networking: make skb_put & friends return void pointers

[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / intel / ipw2x00 / ipw2200.c

/******************************************************************************

  Copyright(c) 2003 - 2006 Intel Corporation. All rights reserved.

  802.11 status code portion of this file from ethereal-0.10.6:
    Copyright 2000, Axis Communications AB
    Ethereal - Network traffic analyzer
    By Gerald Combs <gerald@ethereal.com>
    Copyright 1998 Gerald Combs

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  The full GNU General Public License is included in this distribution in the
  file called LICENSE.

  Contact Information:
  Intel Linux Wireless <ilw@linux.intel.com>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

******************************************************************************/

#include <linux/sched.h>
#include <linux/slab.h>
#include <net/cfg80211-wext.h>
#include "ipw2200.h"
#include "ipw.h"


#ifndef KBUILD_EXTMOD
#define VK "k"
#else
#define VK
#endif

#ifdef CONFIG_IPW2200_DEBUG
#define VD "d"
#else
#define VD
#endif

#ifdef CONFIG_IPW2200_MONITOR
#define VM "m"
#else
#define VM
#endif

#ifdef CONFIG_IPW2200_PROMISCUOUS
#define VP "p"
#else
#define VP
#endif

#ifdef CONFIG_IPW2200_RADIOTAP
#define VR "r"
#else
#define VR
#endif

#ifdef CONFIG_IPW2200_QOS
#define VQ "q"
#else
#define VQ
#endif

#define IPW2200_VERSION "1.2.2" VK VD VM VP VR VQ
#define DRV_DESCRIPTION "Intel(R) PRO/Wireless 2200/2915 Network Driver"
#define DRV_COPYRIGHT   "Copyright(c) 2003-2006 Intel Corporation"
#define DRV_VERSION     IPW2200_VERSION

#define ETH_P_80211_STATS (ETH_P_80211_RAW + 1)

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("ipw2200-ibss.fw");
#ifdef CONFIG_IPW2200_MONITOR
MODULE_FIRMWARE("ipw2200-sniffer.fw");
#endif
MODULE_FIRMWARE("ipw2200-bss.fw");

static int cmdlog = 0;
static int debug = 0;
static int default_channel = 0;
static int network_mode = 0;

static u32 ipw_debug_level;
static int associate;
static int auto_create = 1;
static int led_support = 1;
static int disable = 0;
static int bt_coexist = 0;
static int hwcrypto = 0;
static int roaming = 1;
static const char ipw_modes[] = {
        'a', 'b', 'g', '?'
};
static int antenna = CFG_SYS_ANTENNA_BOTH;

#ifdef CONFIG_IPW2200_PROMISCUOUS
static int rtap_iface = 0;     /* def: 0 -- do not create rtap interface */
#endif

static struct ieee80211_rate ipw2200_rates[] = {
        { .bitrate = 10 },
        { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
        { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
        { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
        { .bitrate = 60 },
        { .bitrate = 90 },
        { .bitrate = 120 },
        { .bitrate = 180 },
        { .bitrate = 240 },
        { .bitrate = 360 },
        { .bitrate = 480 },
        { .bitrate = 540 }
};

#define ipw2200_a_rates         (ipw2200_rates + 4)
#define ipw2200_num_a_rates     8
#define ipw2200_bg_rates        (ipw2200_rates + 0)
#define ipw2200_num_bg_rates    12

/* Ugly macro to convert literal channel numbers into their mhz equivalents
 * There are certianly some conditions that will break this (like feeding it '30')
 * but they shouldn't arise since nothing talks on channel 30. */
#define ieee80211chan2mhz(x) \
        (((x) <= 14) ? \
        (((x) == 14) ? 2484 : ((x) * 5) + 2407) : \
        ((x) + 1000) * 5)

#ifdef CONFIG_IPW2200_QOS
static int qos_enable = 0;
static int qos_burst_enable = 0;
static int qos_no_ack_mask = 0;
static int burst_duration_CCK = 0;
static int burst_duration_OFDM = 0;

static struct libipw_qos_parameters def_qos_parameters_OFDM = {
        {QOS_TX0_CW_MIN_OFDM, QOS_TX1_CW_MIN_OFDM, QOS_TX2_CW_MIN_OFDM,
         QOS_TX3_CW_MIN_OFDM},
        {QOS_TX0_CW_MAX_OFDM, QOS_TX1_CW_MAX_OFDM, QOS_TX2_CW_MAX_OFDM,
         QOS_TX3_CW_MAX_OFDM},
        {QOS_TX0_AIFS, QOS_TX1_AIFS, QOS_TX2_AIFS, QOS_TX3_AIFS},
        {QOS_TX0_ACM, QOS_TX1_ACM, QOS_TX2_ACM, QOS_TX3_ACM},
        {QOS_TX0_TXOP_LIMIT_OFDM, QOS_TX1_TXOP_LIMIT_OFDM,
         QOS_TX2_TXOP_LIMIT_OFDM, QOS_TX3_TXOP_LIMIT_OFDM}
};

static struct libipw_qos_parameters def_qos_parameters_CCK = {
        {QOS_TX0_CW_MIN_CCK, QOS_TX1_CW_MIN_CCK, QOS_TX2_CW_MIN_CCK,
         QOS_TX3_CW_MIN_CCK},
        {QOS_TX0_CW_MAX_CCK, QOS_TX1_CW_MAX_CCK, QOS_TX2_CW_MAX_CCK,
         QOS_TX3_CW_MAX_CCK},
        {QOS_TX0_AIFS, QOS_TX1_AIFS, QOS_TX2_AIFS, QOS_TX3_AIFS},
        {QOS_TX0_ACM, QOS_TX1_ACM, QOS_TX2_ACM, QOS_TX3_ACM},
        {QOS_TX0_TXOP_LIMIT_CCK, QOS_TX1_TXOP_LIMIT_CCK, QOS_TX2_TXOP_LIMIT_CCK,
         QOS_TX3_TXOP_LIMIT_CCK}
};

static struct libipw_qos_parameters def_parameters_OFDM = {
        {DEF_TX0_CW_MIN_OFDM, DEF_TX1_CW_MIN_OFDM, DEF_TX2_CW_MIN_OFDM,
         DEF_TX3_CW_MIN_OFDM},
        {DEF_TX0_CW_MAX_OFDM, DEF_TX1_CW_MAX_OFDM, DEF_TX2_CW_MAX_OFDM,
         DEF_TX3_CW_MAX_OFDM},
        {DEF_TX0_AIFS, DEF_TX1_AIFS, DEF_TX2_AIFS, DEF_TX3_AIFS},
        {DEF_TX0_ACM, DEF_TX1_ACM, DEF_TX2_ACM, DEF_TX3_ACM},
        {DEF_TX0_TXOP_LIMIT_OFDM, DEF_TX1_TXOP_LIMIT_OFDM,
         DEF_TX2_TXOP_LIMIT_OFDM, DEF_TX3_TXOP_LIMIT_OFDM}
};

static struct libipw_qos_parameters def_parameters_CCK = {
        {DEF_TX0_CW_MIN_CCK, DEF_TX1_CW_MIN_CCK, DEF_TX2_CW_MIN_CCK,
         DEF_TX3_CW_MIN_CCK},
        {DEF_TX0_CW_MAX_CCK, DEF_TX1_CW_MAX_CCK, DEF_TX2_CW_MAX_CCK,
         DEF_TX3_CW_MAX_CCK},
        {DEF_TX0_AIFS, DEF_TX1_AIFS, DEF_TX2_AIFS, DEF_TX3_AIFS},
        {DEF_TX0_ACM, DEF_TX1_ACM, DEF_TX2_ACM, DEF_TX3_ACM},
        {DEF_TX0_TXOP_LIMIT_CCK, DEF_TX1_TXOP_LIMIT_CCK, DEF_TX2_TXOP_LIMIT_CCK,
         DEF_TX3_TXOP_LIMIT_CCK}
};

static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };

static int from_priority_to_tx_queue[] = {
        IPW_TX_QUEUE_1, IPW_TX_QUEUE_2, IPW_TX_QUEUE_2, IPW_TX_QUEUE_1,
        IPW_TX_QUEUE_3, IPW_TX_QUEUE_3, IPW_TX_QUEUE_4, IPW_TX_QUEUE_4
};

static u32 ipw_qos_get_burst_duration(struct ipw_priv *priv);

static int ipw_send_qos_params_command(struct ipw_priv *priv, struct libipw_qos_parameters
                                       *qos_param);
static int ipw_send_qos_info_command(struct ipw_priv *priv, struct libipw_qos_information_element
                                     *qos_param);
#endif                          /* CONFIG_IPW2200_QOS */

static struct iw_statistics *ipw_get_wireless_stats(struct net_device *dev);
static void ipw_remove_current_network(struct ipw_priv *priv);
static void ipw_rx(struct ipw_priv *priv);
static int ipw_queue_tx_reclaim(struct ipw_priv *priv,
                                struct clx2_tx_queue *txq, int qindex);
static int ipw_queue_reset(struct ipw_priv *priv);

static int ipw_queue_tx_hcmd(struct ipw_priv *priv, int hcmd, void *buf,
                             int len, int sync);

static void ipw_tx_queue_free(struct ipw_priv *);

static struct ipw_rx_queue *ipw_rx_queue_alloc(struct ipw_priv *);
static void ipw_rx_queue_free(struct ipw_priv *, struct ipw_rx_queue *);
static void ipw_rx_queue_replenish(void *);
static int ipw_up(struct ipw_priv *);
static void ipw_bg_up(struct work_struct *work);
static void ipw_down(struct ipw_priv *);
static void ipw_bg_down(struct work_struct *work);
static int ipw_config(struct ipw_priv *);
static int init_supported_rates(struct ipw_priv *priv,
                                struct ipw_supported_rates *prates);
static void ipw_set_hwcrypto_keys(struct ipw_priv *);
static void ipw_send_wep_keys(struct ipw_priv *, int);

static int snprint_line(char *buf, size_t count,
                        const u8 * data, u32 len, u32 ofs)
{
        int out, i, j, l;
        char c;

        out = snprintf(buf, count, "%08X", ofs);

        for (l = 0, i = 0; i < 2; i++) {
                out += snprintf(buf + out, count - out, " ");
                for (j = 0; j < 8 && l < len; j++, l++)
                        out += snprintf(buf + out, count - out, "%02X ",
                                        data[(i * 8 + j)]);
                for (; j < 8; j++)
                        out += snprintf(buf + out, count - out, "   ");
        }

        out += snprintf(buf + out, count - out, " ");
        for (l = 0, i = 0; i < 2; i++) {
                out += snprintf(buf + out, count - out, " ");
                for (j = 0; j < 8 && l < len; j++, l++) {
                        c = data[(i * 8 + j)];
                        if (!isascii(c) || !isprint(c))
                                c = '.';

                        out += snprintf(buf + out, count - out, "%c", c);
                }

                for (; j < 8; j++)
                        out += snprintf(buf + out, count - out, " ");
        }

        return out;
}

static void printk_buf(int level, const u8 * data, u32 len)
{
        char line[81];
        u32 ofs = 0;
        if (!(ipw_debug_level & level))
                return;

        while (len) {
                snprint_line(line, sizeof(line), &data[ofs],
                             min(len, 16U), ofs);
                printk(KERN_DEBUG "%s\n", line);
                ofs += 16;
                len -= min(len, 16U);
        }
}

static int snprintk_buf(u8 * output, size_t size, const u8 * data, size_t len)
{
        size_t out = size;
        u32 ofs = 0;
        int total = 0;

        while (size && len) {
                out = snprint_line(output, size, &data[ofs],
                                   min_t(size_t, len, 16U), ofs);

                ofs += 16;
                output += out;
                size -= out;
                len -= min_t(size_t, len, 16U);
                total += out;
        }
        return total;
}

/* alias for 32-bit indirect read (for SRAM/reg above 4K), with debug wrapper */
static u32 _ipw_read_reg32(struct ipw_priv *priv, u32 reg);
#define ipw_read_reg32(a, b) _ipw_read_reg32(a, b)

/* alias for 8-bit indirect read (for SRAM/reg above 4K), with debug wrapper */
static u8 _ipw_read_reg8(struct ipw_priv *ipw, u32 reg);
#define ipw_read_reg8(a, b) _ipw_read_reg8(a, b)

/* 8-bit indirect write (for SRAM/reg above 4K), with debug wrapper */
static void _ipw_write_reg8(struct ipw_priv *priv, u32 reg, u8 value);
static inline void ipw_write_reg8(struct ipw_priv *a, u32 b, u8 c)
{
        IPW_DEBUG_IO("%s %d: write_indirect8(0x%08X, 0x%08X)\n", __FILE__,
                     __LINE__, (u32) (b), (u32) (c));
        _ipw_write_reg8(a, b, c);
}

/* 16-bit indirect write (for SRAM/reg above 4K), with debug wrapper */
static void _ipw_write_reg16(struct ipw_priv *priv, u32 reg, u16 value);
static inline void ipw_write_reg16(struct ipw_priv *a, u32 b, u16 c)
{
        IPW_DEBUG_IO("%s %d: write_indirect16(0x%08X, 0x%08X)\n", __FILE__,
                     __LINE__, (u32) (b), (u32) (c));
        _ipw_write_reg16(a, b, c);
}

/* 32-bit indirect write (for SRAM/reg above 4K), with debug wrapper */
static void _ipw_write_reg32(struct ipw_priv *priv, u32 reg, u32 value);
static inline void ipw_write_reg32(struct ipw_priv *a, u32 b, u32 c)
{
        IPW_DEBUG_IO("%s %d: write_indirect32(0x%08X, 0x%08X)\n", __FILE__,
                     __LINE__, (u32) (b), (u32) (c));
        _ipw_write_reg32(a, b, c);
}

/* 8-bit direct write (low 4K) */
static inline void _ipw_write8(struct ipw_priv *ipw, unsigned long ofs,
                u8 val)
{
        writeb(val, ipw->hw_base + ofs);
}

/* 8-bit direct write (for low 4K of SRAM/regs), with debug wrapper */
#define ipw_write8(ipw, ofs, val) do { \
        IPW_DEBUG_IO("%s %d: write_direct8(0x%08X, 0x%08X)\n", __FILE__, \
                        __LINE__, (u32)(ofs), (u32)(val)); \
        _ipw_write8(ipw, ofs, val); \
} while (0)

/* 16-bit direct write (low 4K) */
static inline void _ipw_write16(struct ipw_priv *ipw, unsigned long ofs,
                u16 val)
{
        writew(val, ipw->hw_base + ofs);
}

/* 16-bit direct write (for low 4K of SRAM/regs), with debug wrapper */
#define ipw_write16(ipw, ofs, val) do { \
        IPW_DEBUG_IO("%s %d: write_direct16(0x%08X, 0x%08X)\n", __FILE__, \
                        __LINE__, (u32)(ofs), (u32)(val)); \
        _ipw_write16(ipw, ofs, val); \
} while (0)

/* 32-bit direct write (low 4K) */
static inline void _ipw_write32(struct ipw_priv *ipw, unsigned long ofs,
                u32 val)
{
        writel(val, ipw->hw_base + ofs);
}

/* 32-bit direct write (for low 4K of SRAM/regs), with debug wrapper */
#define ipw_write32(ipw, ofs, val) do { \
        IPW_DEBUG_IO("%s %d: write_direct32(0x%08X, 0x%08X)\n", __FILE__, \
                        __LINE__, (u32)(ofs), (u32)(val)); \
        _ipw_write32(ipw, ofs, val); \
} while (0)

/* 8-bit direct read (low 4K) */
static inline u8 _ipw_read8(struct ipw_priv *ipw, unsigned long ofs)
{
        return readb(ipw->hw_base + ofs);
}

/* alias to 8-bit direct read (low 4K of SRAM/regs), with debug wrapper */
#define ipw_read8(ipw, ofs) ({ \
        IPW_DEBUG_IO("%s %d: read_direct8(0x%08X)\n", __FILE__, __LINE__, \
                        (u32)(ofs)); \
        _ipw_read8(ipw, ofs); \
})

/* 16-bit direct read (low 4K) */
static inline u16 _ipw_read16(struct ipw_priv *ipw, unsigned long ofs)
{
        return readw(ipw->hw_base + ofs);
}

/* alias to 16-bit direct read (low 4K of SRAM/regs), with debug wrapper */
#define ipw_read16(ipw, ofs) ({ \
        IPW_DEBUG_IO("%s %d: read_direct16(0x%08X)\n", __FILE__, __LINE__, \
                        (u32)(ofs)); \
        _ipw_read16(ipw, ofs); \
})

/* 32-bit direct read (low 4K) */
static inline u32 _ipw_read32(struct ipw_priv *ipw, unsigned long ofs)
{
        return readl(ipw->hw_base + ofs);
}

/* alias to 32-bit direct read (low 4K of SRAM/regs), with debug wrapper */
#define ipw_read32(ipw, ofs) ({ \
        IPW_DEBUG_IO("%s %d: read_direct32(0x%08X)\n", __FILE__, __LINE__, \
                        (u32)(ofs)); \
        _ipw_read32(ipw, ofs); \
})

static void _ipw_read_indirect(struct ipw_priv *, u32, u8 *, int);
/* alias to multi-byte read (SRAM/regs above 4K), with debug wrapper */
#define ipw_read_indirect(a, b, c, d) ({ \
        IPW_DEBUG_IO("%s %d: read_indirect(0x%08X) %u bytes\n", __FILE__, \
                        __LINE__, (u32)(b), (u32)(d)); \
        _ipw_read_indirect(a, b, c, d); \
})

/* alias to multi-byte read (SRAM/regs above 4K), with debug wrapper */
static void _ipw_write_indirect(struct ipw_priv *priv, u32 addr, u8 * data,
                                int num);
#define ipw_write_indirect(a, b, c, d) do { \
        IPW_DEBUG_IO("%s %d: write_indirect(0x%08X) %u bytes\n", __FILE__, \
                        __LINE__, (u32)(b), (u32)(d)); \
        _ipw_write_indirect(a, b, c, d); \
} while (0)

/* 32-bit indirect write (above 4K) */
static void _ipw_write_reg32(struct ipw_priv *priv, u32 reg, u32 value)
{
        IPW_DEBUG_IO(" %p : reg = 0x%8X : value = 0x%8X\n", priv, reg, value);
        _ipw_write32(priv, IPW_INDIRECT_ADDR, reg);
        _ipw_write32(priv, IPW_INDIRECT_DATA, value);
}

/* 8-bit indirect write (above 4K) */
static void _ipw_write_reg8(struct ipw_priv *priv, u32 reg, u8 value)
{
        u32 aligned_addr = reg & IPW_INDIRECT_ADDR_MASK;        /* dword align */
        u32 dif_len = reg - aligned_addr;

        IPW_DEBUG_IO(" reg = 0x%8X : value = 0x%8X\n", reg, value);
        _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
        _ipw_write8(priv, IPW_INDIRECT_DATA + dif_len, value);
}

/* 16-bit indirect write (above 4K) */
static void _ipw_write_reg16(struct ipw_priv *priv, u32 reg, u16 value)
{
        u32 aligned_addr = reg & IPW_INDIRECT_ADDR_MASK;        /* dword align */
        u32 dif_len = (reg - aligned_addr) & (~0x1ul);

        IPW_DEBUG_IO(" reg = 0x%8X : value = 0x%8X\n", reg, value);
        _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
        _ipw_write16(priv, IPW_INDIRECT_DATA + dif_len, value);
}

/* 8-bit indirect read (above 4K) */
static u8 _ipw_read_reg8(struct ipw_priv *priv, u32 reg)
{
        u32 word;
        _ipw_write32(priv, IPW_INDIRECT_ADDR, reg & IPW_INDIRECT_ADDR_MASK);
        IPW_DEBUG_IO(" reg = 0x%8X :\n", reg);
        word = _ipw_read32(priv, IPW_INDIRECT_DATA);
        return (word >> ((reg & 0x3) * 8)) & 0xff;
}

/* 32-bit indirect read (above 4K) */
static u32 _ipw_read_reg32(struct ipw_priv *priv, u32 reg)
{
        u32 value;

        IPW_DEBUG_IO("%p : reg = 0x%08x\n", priv, reg);

        _ipw_write32(priv, IPW_INDIRECT_ADDR, reg);
        value = _ipw_read32(priv, IPW_INDIRECT_DATA);
        IPW_DEBUG_IO(" reg = 0x%4X : value = 0x%4x\n", reg, value);
        return value;
}

/* General purpose, no alignment requirement, iterative (multi-byte) read, */
/*    for area above 1st 4K of SRAM/reg space */
static void _ipw_read_indirect(struct ipw_priv *priv, u32 addr, u8 * buf,
                               int num)
{
        u32 aligned_addr = addr & IPW_INDIRECT_ADDR_MASK;       /* dword align */
        u32 dif_len = addr - aligned_addr;
        u32 i;

        IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);

        if (num <= 0) {
                return;
        }

        /* Read the first dword (or portion) byte by byte */
        if (unlikely(dif_len)) {
                _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
                /* Start reading at aligned_addr + dif_len */
                for (i = dif_len; ((i < 4) && (num > 0)); i++, num--)
                        *buf++ = _ipw_read8(priv, IPW_INDIRECT_DATA + i);
                aligned_addr += 4;
        }

        /* Read all of the middle dwords as dwords, with auto-increment */
        _ipw_write32(priv, IPW_AUTOINC_ADDR, aligned_addr);
        for (; num >= 4; buf += 4, aligned_addr += 4, num -= 4)
                *(u32 *) buf = _ipw_read32(priv, IPW_AUTOINC_DATA);

        /* Read the last dword (or portion) byte by byte */
        if (unlikely(num)) {
                _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
                for (i = 0; num > 0; i++, num--)
                        *buf++ = ipw_read8(priv, IPW_INDIRECT_DATA + i);
        }
}

/* General purpose, no alignment requirement, iterative (multi-byte) write, */
/*    for area above 1st 4K of SRAM/reg space */
static void _ipw_write_indirect(struct ipw_priv *priv, u32 addr, u8 * buf,
                                int num)
{
        u32 aligned_addr = addr & IPW_INDIRECT_ADDR_MASK;       /* dword align */
        u32 dif_len = addr - aligned_addr;
        u32 i;

        IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);

        if (num <= 0) {
                return;
        }

        /* Write the first dword (or portion) byte by byte */
        if (unlikely(dif_len)) {
                _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
                /* Start writing at aligned_addr + dif_len */
                for (i = dif_len; ((i < 4) && (num > 0)); i++, num--, buf++)
                        _ipw_write8(priv, IPW_INDIRECT_DATA + i, *buf);
                aligned_addr += 4;
        }

        /* Write all of the middle dwords as dwords, with auto-increment */
        _ipw_write32(priv, IPW_AUTOINC_ADDR, aligned_addr);
        for (; num >= 4; buf += 4, aligned_addr += 4, num -= 4)
                _ipw_write32(priv, IPW_AUTOINC_DATA, *(u32 *) buf);

        /* Write the last dword (or portion) byte by byte */
        if (unlikely(num)) {
                _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
                for (i = 0; num > 0; i++, num--, buf++)
                        _ipw_write8(priv, IPW_INDIRECT_DATA + i, *buf);
        }
}

/* General purpose, no alignment requirement, iterative (multi-byte) write, */
/*    for 1st 4K of SRAM/regs space */
static void ipw_write_direct(struct ipw_priv *priv, u32 addr, void *buf,
                             int num)
{
        memcpy_toio((priv->hw_base + addr), buf, num);
}

/* Set bit(s) in low 4K of SRAM/regs */
static inline void ipw_set_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
        ipw_write32(priv, reg, ipw_read32(priv, reg) | mask);
}

/* Clear bit(s) in low 4K of SRAM/regs */
static inline void ipw_clear_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
        ipw_write32(priv, reg, ipw_read32(priv, reg) & ~mask);
}

static inline void __ipw_enable_interrupts(struct ipw_priv *priv)
{
        if (priv->status & STATUS_INT_ENABLED)
                return;
        priv->status |= STATUS_INT_ENABLED;
        ipw_write32(priv, IPW_INTA_MASK_R, IPW_INTA_MASK_ALL);
}

static inline void __ipw_disable_interrupts(struct ipw_priv *priv)
{
        if (!(priv->status & STATUS_INT_ENABLED))
                return;
        priv->status &= ~STATUS_INT_ENABLED;
        ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
}

static inline void ipw_enable_interrupts(struct ipw_priv *priv)
{
        unsigned long flags;

        spin_lock_irqsave(&priv->irq_lock, flags);
        __ipw_enable_interrupts(priv);
        spin_unlock_irqrestore(&priv->irq_lock, flags);
}

static inline void ipw_disable_interrupts(struct ipw_priv *priv)
{
        unsigned long flags;

        spin_lock_irqsave(&priv->irq_lock, flags);
        __ipw_disable_interrupts(priv);
        spin_unlock_irqrestore(&priv->irq_lock, flags);
}

static char *ipw_error_desc(u32 val)
{
        switch (val) {
        case IPW_FW_ERROR_OK:
                return "ERROR_OK";
        case IPW_FW_ERROR_FAIL:
                return "ERROR_FAIL";
        case IPW_FW_ERROR_MEMORY_UNDERFLOW:
                return "MEMORY_UNDERFLOW";
        case IPW_FW_ERROR_MEMORY_OVERFLOW:
                return "MEMORY_OVERFLOW";
        case IPW_FW_ERROR_BAD_PARAM:
                return "BAD_PARAM";
        case IPW_FW_ERROR_BAD_CHECKSUM:
                return "BAD_CHECKSUM";
        case IPW_FW_ERROR_NMI_INTERRUPT:
                return "NMI_INTERRUPT";
        case IPW_FW_ERROR_BAD_DATABASE:
                return "BAD_DATABASE";
        case IPW_FW_ERROR_ALLOC_FAIL:
                return "ALLOC_FAIL";
        case IPW_FW_ERROR_DMA_UNDERRUN:
                return "DMA_UNDERRUN";
        case IPW_FW_ERROR_DMA_STATUS:
                return "DMA_STATUS";
        case IPW_FW_ERROR_DINO_ERROR:
                return "DINO_ERROR";
        case IPW_FW_ERROR_EEPROM_ERROR:
                return "EEPROM_ERROR";
        case IPW_FW_ERROR_SYSASSERT:
                return "SYSASSERT";
        case IPW_FW_ERROR_FATAL_ERROR:
                return "FATAL_ERROR";
        default:
                return "UNKNOWN_ERROR";
        }
}

static void ipw_dump_error_log(struct ipw_priv *priv,
                               struct ipw_fw_error *error)
{
        u32 i;

        if (!error) {
                IPW_ERROR("Error allocating and capturing error log.  "
                          "Nothing to dump.\n");
                return;
        }

        IPW_ERROR("Start IPW Error Log Dump:\n");
        IPW_ERROR("Status: 0x%08X, Config: %08X\n",
                  error->status, error->config);

        for (i = 0; i < error->elem_len; i++)
                IPW_ERROR("%s %i 0x%08x  0x%08x  0x%08x  0x%08x  0x%08x\n",
                          ipw_error_desc(error->elem[i].desc),
                          error->elem[i].time,
                          error->elem[i].blink1,
                          error->elem[i].blink2,
                          error->elem[i].link1,
                          error->elem[i].link2, error->elem[i].data);
        for (i = 0; i < error->log_len; i++)
                IPW_ERROR("%i\t0x%08x\t%i\n",
                          error->log[i].time,
                          error->log[i].data, error->log[i].event);
}

static inline int ipw_is_init(struct ipw_priv *priv)
{
        return (priv->status & STATUS_INIT) ? 1 : 0;
}

static int ipw_get_ordinal(struct ipw_priv *priv, u32 ord, void *val, u32 * len)
{
        u32 addr, field_info, field_len, field_count, total_len;

        IPW_DEBUG_ORD("ordinal = %i\n", ord);

        if (!priv || !val || !len) {
                IPW_DEBUG_ORD("Invalid argument\n");
                return -EINVAL;
        }

        /* verify device ordinal tables have been initialized */
        if (!priv->table0_addr || !priv->table1_addr || !priv->table2_addr) {
                IPW_DEBUG_ORD("Access ordinals before initialization\n");
                return -EINVAL;
        }

        switch (IPW_ORD_TABLE_ID_MASK & ord) {
        case IPW_ORD_TABLE_0_MASK:
                /*
                 * TABLE 0: Direct access to a table of 32 bit values
                 *
                 * This is a very simple table with the data directly
                 * read from the table
                 */

                /* remove the table id from the ordinal */
                ord &= IPW_ORD_TABLE_VALUE_MASK;

                /* boundary check */
                if (ord > priv->table0_len) {
                        IPW_DEBUG_ORD("ordinal value (%i) longer then "
                                      "max (%i)\n", ord, priv->table0_len);
                        return -EINVAL;
                }

                /* verify we have enough room to store the value */
                if (*len < sizeof(u32)) {
                        IPW_DEBUG_ORD("ordinal buffer length too small, "
                                      "need %zd\n", sizeof(u32));
                        return -EINVAL;
                }

                IPW_DEBUG_ORD("Reading TABLE0[%i] from offset 0x%08x\n",
                              ord, priv->table0_addr + (ord << 2));

                *len = sizeof(u32);
                ord <<= 2;
                *((u32 *) val) = ipw_read32(priv, priv->table0_addr + ord);
                break;

        case IPW_ORD_TABLE_1_MASK:
                /*
                 * TABLE 1: Indirect access to a table of 32 bit values
                 *
                 * This is a fairly large table of u32 values each
                 * representing starting addr for the data (which is
                 * also a u32)
                 */

                /* remove the table id from the ordinal */
                ord &= IPW_ORD_TABLE_VALUE_MASK;

                /* boundary check */
                if (ord > priv->table1_len) {
                        IPW_DEBUG_ORD("ordinal value too long\n");
                        return -EINVAL;
                }

                /* verify we have enough room to store the value */
                if (*len < sizeof(u32)) {
                        IPW_DEBUG_ORD("ordinal buffer length too small, "
                                      "need %zd\n", sizeof(u32));
                        return -EINVAL;
                }

                *((u32 *) val) =
                    ipw_read_reg32(priv, (priv->table1_addr + (ord << 2)));
                *len = sizeof(u32);
                break;

        case IPW_ORD_TABLE_2_MASK:
                /*
                 * TABLE 2: Indirect access to a table of variable sized values
                 *
                 * This table consist of six values, each containing
                 *     - dword containing the starting offset of the data
                 *     - dword containing the lengh in the first 16bits
                 *       and the count in the second 16bits
                 */

                /* remove the table id from the ordinal */
                ord &= IPW_ORD_TABLE_VALUE_MASK;

                /* boundary check */
                if (ord > priv->table2_len) {
                        IPW_DEBUG_ORD("ordinal value too long\n");
                        return -EINVAL;
                }

                /* get the address of statistic */
                addr = ipw_read_reg32(priv, priv->table2_addr + (ord << 3));

                /* get the second DW of statistics ;
                 * two 16-bit words - first is length, second is count */
                field_info =
                    ipw_read_reg32(priv,
                                   priv->table2_addr + (ord << 3) +
                                   sizeof(u32));

                /* get each entry length */
                field_len = *((u16 *) & field_info);

                /* get number of entries */
                field_count = *(((u16 *) & field_info) + 1);

                /* abort if not enough memory */
                total_len = field_len * field_count;
                if (total_len > *len) {
                        *len = total_len;
                        return -EINVAL;
                }

                *len = total_len;
                if (!total_len)
                        return 0;

                IPW_DEBUG_ORD("addr = 0x%08x, total_len = %i, "
                              "field_info = 0x%08x\n",
                              addr, total_len, field_info);
                ipw_read_indirect(priv, addr, val, total_len);
                break;

        default:
                IPW_DEBUG_ORD("Invalid ordinal!\n");
                return -EINVAL;

        }

        return 0;
}

static void ipw_init_ordinals(struct ipw_priv *priv)
{
        priv->table0_addr = IPW_ORDINALS_TABLE_LOWER;
        priv->table0_len = ipw_read32(priv, priv->table0_addr);

        IPW_DEBUG_ORD("table 0 offset at 0x%08x, len = %i\n",
                      priv->table0_addr, priv->table0_len);

        priv->table1_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_1);
        priv->table1_len = ipw_read_reg32(priv, priv->table1_addr);

        IPW_DEBUG_ORD("table 1 offset at 0x%08x, len = %i\n",
                      priv->table1_addr, priv->table1_len);

        priv->table2_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_2);
        priv->table2_len = ipw_read_reg32(priv, priv->table2_addr);
        priv->table2_len &= 0x0000ffff; /* use first two bytes */

        IPW_DEBUG_ORD("table 2 offset at 0x%08x, len = %i\n",
                      priv->table2_addr, priv->table2_len);

}

static u32 ipw_register_toggle(u32 reg)
{
        reg &= ~IPW_START_STANDBY;
        if (reg & IPW_GATE_ODMA)
                reg &= ~IPW_GATE_ODMA;
        if (reg & IPW_GATE_IDMA)
                reg &= ~IPW_GATE_IDMA;
        if (reg & IPW_GATE_ADMA)
                reg &= ~IPW_GATE_ADMA;
        return reg;
}

/*
 * LED behavior:
 * - On radio ON, turn on any LEDs that require to be on during start
 * - On initialization, start unassociated blink
 * - On association, disable unassociated blink
 * - On disassociation, start unassociated blink
 * - On radio OFF, turn off any LEDs started during radio on
 *
 */
#define LD_TIME_LINK_ON msecs_to_jiffies(300)
#define LD_TIME_LINK_OFF msecs_to_jiffies(2700)
#define LD_TIME_ACT_ON msecs_to_jiffies(250)

static void ipw_led_link_on(struct ipw_priv *priv)
{
        unsigned long flags;
        u32 led;

        /* If configured to not use LEDs, or nic_type is 1,
         * then we don't toggle a LINK led */
        if (priv->config & CFG_NO_LED || priv->nic_type == EEPROM_NIC_TYPE_1)
                return;

        spin_lock_irqsave(&priv->lock, flags);

        if (!(priv->status & STATUS_RF_KILL_MASK) &&
            !(priv->status & STATUS_LED_LINK_ON)) {
                IPW_DEBUG_LED("Link LED On\n");
                led = ipw_read_reg32(priv, IPW_EVENT_REG);
                led |= priv->led_association_on;

                led = ipw_register_toggle(led);

                IPW_DEBUG_LED("Reg: 0x%08X\n", led);
                ipw_write_reg32(priv, IPW_EVENT_REG, led);

                priv->status |= STATUS_LED_LINK_ON;

                /* If we aren't associated, schedule turning the LED off */
                if (!(priv->status & STATUS_ASSOCIATED))
                        schedule_delayed_work(&priv->led_link_off,
                                              LD_TIME_LINK_ON);
        }

        spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_link_on(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, led_link_on.work);
        mutex_lock(&priv->mutex);
        ipw_led_link_on(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_led_link_off(struct ipw_priv *priv)
{
        unsigned long flags;
        u32 led;

        /* If configured not to use LEDs, or nic type is 1,
         * then we don't goggle the LINK led. */
        if (priv->config & CFG_NO_LED || priv->nic_type == EEPROM_NIC_TYPE_1)
                return;

        spin_lock_irqsave(&priv->lock, flags);

        if (priv->status & STATUS_LED_LINK_ON) {
                led = ipw_read_reg32(priv, IPW_EVENT_REG);
                led &= priv->led_association_off;
                led = ipw_register_toggle(led);

                IPW_DEBUG_LED("Reg: 0x%08X\n", led);
                ipw_write_reg32(priv, IPW_EVENT_REG, led);

                IPW_DEBUG_LED("Link LED Off\n");

                priv->status &= ~STATUS_LED_LINK_ON;

                /* If we aren't associated and the radio is on, schedule
                 * turning the LED on (blink while unassociated) */
                if (!(priv->status & STATUS_RF_KILL_MASK) &&
                    !(priv->status & STATUS_ASSOCIATED))
                        schedule_delayed_work(&priv->led_link_on,
                                              LD_TIME_LINK_OFF);

        }

        spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_link_off(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, led_link_off.work);
        mutex_lock(&priv->mutex);
        ipw_led_link_off(priv);
        mutex_unlock(&priv->mutex);
}

static void __ipw_led_activity_on(struct ipw_priv *priv)
{
        u32 led;

        if (priv->config & CFG_NO_LED)
                return;

        if (priv->status & STATUS_RF_KILL_MASK)
                return;

        if (!(priv->status & STATUS_LED_ACT_ON)) {
                led = ipw_read_reg32(priv, IPW_EVENT_REG);
                led |= priv->led_activity_on;

                led = ipw_register_toggle(led);

                IPW_DEBUG_LED("Reg: 0x%08X\n", led);
                ipw_write_reg32(priv, IPW_EVENT_REG, led);

                IPW_DEBUG_LED("Activity LED On\n");

                priv->status |= STATUS_LED_ACT_ON;

                cancel_delayed_work(&priv->led_act_off);
                schedule_delayed_work(&priv->led_act_off, LD_TIME_ACT_ON);
        } else {
                /* Reschedule LED off for full time period */
                cancel_delayed_work(&priv->led_act_off);
                schedule_delayed_work(&priv->led_act_off, LD_TIME_ACT_ON);
        }
}

#if 0
void ipw_led_activity_on(struct ipw_priv *priv)
{
        unsigned long flags;
        spin_lock_irqsave(&priv->lock, flags);
        __ipw_led_activity_on(priv);
        spin_unlock_irqrestore(&priv->lock, flags);
}
#endif  /*  0  */

static void ipw_led_activity_off(struct ipw_priv *priv)
{
        unsigned long flags;
        u32 led;

        if (priv->config & CFG_NO_LED)
                return;

        spin_lock_irqsave(&priv->lock, flags);

        if (priv->status & STATUS_LED_ACT_ON) {
                led = ipw_read_reg32(priv, IPW_EVENT_REG);
                led &= priv->led_activity_off;

                led = ipw_register_toggle(led);

                IPW_DEBUG_LED("Reg: 0x%08X\n", led);
                ipw_write_reg32(priv, IPW_EVENT_REG, led);

                IPW_DEBUG_LED("Activity LED Off\n");

                priv->status &= ~STATUS_LED_ACT_ON;
        }

        spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_activity_off(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, led_act_off.work);
        mutex_lock(&priv->mutex);
        ipw_led_activity_off(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_led_band_on(struct ipw_priv *priv)
{
        unsigned long flags;
        u32 led;

        /* Only nic type 1 supports mode LEDs */
        if (priv->config & CFG_NO_LED ||
            priv->nic_type != EEPROM_NIC_TYPE_1 || !priv->assoc_network)
                return;

        spin_lock_irqsave(&priv->lock, flags);

        led = ipw_read_reg32(priv, IPW_EVENT_REG);
        if (priv->assoc_network->mode == IEEE_A) {
                led |= priv->led_ofdm_on;
                led &= priv->led_association_off;
                IPW_DEBUG_LED("Mode LED On: 802.11a\n");
        } else if (priv->assoc_network->mode == IEEE_G) {
                led |= priv->led_ofdm_on;
                led |= priv->led_association_on;
                IPW_DEBUG_LED("Mode LED On: 802.11g\n");
        } else {
                led &= priv->led_ofdm_off;
                led |= priv->led_association_on;
                IPW_DEBUG_LED("Mode LED On: 802.11b\n");
        }

        led = ipw_register_toggle(led);

        IPW_DEBUG_LED("Reg: 0x%08X\n", led);
        ipw_write_reg32(priv, IPW_EVENT_REG, led);

        spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_led_band_off(struct ipw_priv *priv)
{
        unsigned long flags;
        u32 led;

        /* Only nic type 1 supports mode LEDs */
        if (priv->config & CFG_NO_LED || priv->nic_type != EEPROM_NIC_TYPE_1)
                return;

        spin_lock_irqsave(&priv->lock, flags);

        led = ipw_read_reg32(priv, IPW_EVENT_REG);
        led &= priv->led_ofdm_off;
        led &= priv->led_association_off;

        led = ipw_register_toggle(led);

        IPW_DEBUG_LED("Reg: 0x%08X\n", led);
        ipw_write_reg32(priv, IPW_EVENT_REG, led);

        spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_led_radio_on(struct ipw_priv *priv)
{
        ipw_led_link_on(priv);
}

static void ipw_led_radio_off(struct ipw_priv *priv)
{
        ipw_led_activity_off(priv);
        ipw_led_link_off(priv);
}

static void ipw_led_link_up(struct ipw_priv *priv)
{
        /* Set the Link Led on for all nic types */
        ipw_led_link_on(priv);
}

static void ipw_led_link_down(struct ipw_priv *priv)
{
        ipw_led_activity_off(priv);
        ipw_led_link_off(priv);

        if (priv->status & STATUS_RF_KILL_MASK)
                ipw_led_radio_off(priv);
}

static void ipw_led_init(struct ipw_priv *priv)
{
        priv->nic_type = priv->eeprom[EEPROM_NIC_TYPE];

        /* Set the default PINs for the link and activity leds */
        priv->led_activity_on = IPW_ACTIVITY_LED;
        priv->led_activity_off = ~(IPW_ACTIVITY_LED);

        priv->led_association_on = IPW_ASSOCIATED_LED;
        priv->led_association_off = ~(IPW_ASSOCIATED_LED);

        /* Set the default PINs for the OFDM leds */
        priv->led_ofdm_on = IPW_OFDM_LED;
        priv->led_ofdm_off = ~(IPW_OFDM_LED);

        switch (priv->nic_type) {
        case EEPROM_NIC_TYPE_1:
                /* In this NIC type, the LEDs are reversed.... */
                priv->led_activity_on = IPW_ASSOCIATED_LED;
                priv->led_activity_off = ~(IPW_ASSOCIATED_LED);
                priv->led_association_on = IPW_ACTIVITY_LED;
                priv->led_association_off = ~(IPW_ACTIVITY_LED);

                if (!(priv->config & CFG_NO_LED))
                        ipw_led_band_on(priv);

                /* And we don't blink link LEDs for this nic, so
                 * just return here */
                return;

        case EEPROM_NIC_TYPE_3:
        case EEPROM_NIC_TYPE_2:
        case EEPROM_NIC_TYPE_4:
        case EEPROM_NIC_TYPE_0:
                break;

        default:
                IPW_DEBUG_INFO("Unknown NIC type from EEPROM: %d\n",
                               priv->nic_type);
                priv->nic_type = EEPROM_NIC_TYPE_0;
                break;
        }

        if (!(priv->config & CFG_NO_LED)) {
                if (priv->status & STATUS_ASSOCIATED)
                        ipw_led_link_on(priv);
                else
                        ipw_led_link_off(priv);
        }
}

static void ipw_led_shutdown(struct ipw_priv *priv)
{
        ipw_led_activity_off(priv);
        ipw_led_link_off(priv);
        ipw_led_band_off(priv);
        cancel_delayed_work(&priv->led_link_on);
        cancel_delayed_work(&priv->led_link_off);
        cancel_delayed_work(&priv->led_act_off);
}

/*
 * The following adds a new attribute to the sysfs representation
 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/ipw/)
 * used for controlling the debug level.
 *
 * See the level definitions in ipw for details.
 */
static ssize_t show_debug_level(struct device_driver *d, char *buf)
{
        return sprintf(buf, "0x%08X\n", ipw_debug_level);
}

static ssize_t store_debug_level(struct device_driver *d, const char *buf,
                                 size_t count)
{
        char *p = (char *)buf;
        u32 val;

        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
                p++;
                if (p[0] == 'x' || p[0] == 'X')
                        p++;
                val = simple_strtoul(p, &p, 16);
        } else
                val = simple_strtoul(p, &p, 10);
        if (p == buf)
                printk(KERN_INFO DRV_NAME
                       ": %s is not in hex or decimal form.\n", buf);
        else
                ipw_debug_level = val;

        return strnlen(buf, count);
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
                   show_debug_level, store_debug_level);

static inline u32 ipw_get_event_log_len(struct ipw_priv *priv)
{
        /* length = 1st dword in log */
        return ipw_read_reg32(priv, ipw_read32(priv, IPW_EVENT_LOG));
}

static void ipw_capture_event_log(struct ipw_priv *priv,
                                  u32 log_len, struct ipw_event *log)
{
        u32 base;

        if (log_len) {
                base = ipw_read32(priv, IPW_EVENT_LOG);
                ipw_read_indirect(priv, base + sizeof(base) + sizeof(u32),
                                  (u8 *) log, sizeof(*log) * log_len);
        }
}

static struct ipw_fw_error *ipw_alloc_error_log(struct ipw_priv *priv)
{
        struct ipw_fw_error *error;
        u32 log_len = ipw_get_event_log_len(priv);
        u32 base = ipw_read32(priv, IPW_ERROR_LOG);
        u32 elem_len = ipw_read_reg32(priv, base);

        error = kmalloc(sizeof(*error) +
                        sizeof(*error->elem) * elem_len +
                        sizeof(*error->log) * log_len, GFP_ATOMIC);
        if (!error) {
                IPW_ERROR("Memory allocation for firmware error log "
                          "failed.\n");
                return NULL;
        }
        error->jiffies = jiffies;
        error->status = priv->status;
        error->config = priv->config;
        error->elem_len = elem_len;
        error->log_len = log_len;
        error->elem = (struct ipw_error_elem *)error->payload;
        error->log = (struct ipw_event *)(error->elem + elem_len);

        ipw_capture_event_log(priv, log_len, error->log);

        if (elem_len)
                ipw_read_indirect(priv, base + sizeof(base), (u8 *) error->elem,
                                  sizeof(*error->elem) * elem_len);

        return error;
}

static ssize_t show_event_log(struct device *d,
                              struct device_attribute *attr, char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        u32 log_len = ipw_get_event_log_len(priv);
        u32 log_size;
        struct ipw_event *log;
        u32 len = 0, i;

        /* not using min() because of its strict type checking */
        log_size = PAGE_SIZE / sizeof(*log) > log_len ?
                        sizeof(*log) * log_len : PAGE_SIZE;
        log = kzalloc(log_size, GFP_KERNEL);
        if (!log) {
                IPW_ERROR("Unable to allocate memory for log\n");
                return 0;
        }
        log_len = log_size / sizeof(*log);
        ipw_capture_event_log(priv, log_len, log);

        len += snprintf(buf + len, PAGE_SIZE - len, "%08X", log_len);
        for (i = 0; i < log_len; i++)
                len += snprintf(buf + len, PAGE_SIZE - len,
                                "\n%08X%08X%08X",
                                log[i].time, log[i].event, log[i].data);
        len += snprintf(buf + len, PAGE_SIZE - len, "\n");
        kfree(log);
        return len;
}

static DEVICE_ATTR(event_log, S_IRUGO, show_event_log, NULL);

static ssize_t show_error(struct device *d,
                          struct device_attribute *attr, char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        u32 len = 0, i;
        if (!priv->error)
                return 0;
        len += snprintf(buf + len, PAGE_SIZE - len,
                        "%08lX%08X%08X%08X",
                        priv->error->jiffies,
                        priv->error->status,
                        priv->error->config, priv->error->elem_len);
        for (i = 0; i < priv->error->elem_len; i++)
                len += snprintf(buf + len, PAGE_SIZE - len,
                                "\n%08X%08X%08X%08X%08X%08X%08X",
                                priv->error->elem[i].time,
                                priv->error->elem[i].desc,
                                priv->error->elem[i].blink1,
                                priv->error->elem[i].blink2,
                                priv->error->elem[i].link1,
                                priv->error->elem[i].link2,
                                priv->error->elem[i].data);

        len += snprintf(buf + len, PAGE_SIZE - len,
                        "\n%08X", priv->error->log_len);
        for (i = 0; i < priv->error->log_len; i++)
                len += snprintf(buf + len, PAGE_SIZE - len,
                                "\n%08X%08X%08X",
                                priv->error->log[i].time,
                                priv->error->log[i].event,
                                priv->error->log[i].data);
        len += snprintf(buf + len, PAGE_SIZE - len, "\n");
        return len;
}

static ssize_t clear_error(struct device *d,
                           struct device_attribute *attr,
                           const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        kfree(priv->error);
        priv->error = NULL;
        return count;
}

static DEVICE_ATTR(error, S_IRUGO | S_IWUSR, show_error, clear_error);

static ssize_t show_cmd_log(struct device *d,
                            struct device_attribute *attr, char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        u32 len = 0, i;
        if (!priv->cmdlog)
                return 0;
        for (i = (priv->cmdlog_pos + 1) % priv->cmdlog_len;
             (i != priv->cmdlog_pos) && (len < PAGE_SIZE);
             i = (i + 1) % priv->cmdlog_len) {
                len +=
                    snprintf(buf + len, PAGE_SIZE - len,
                             "\n%08lX%08X%08X%08X\n", priv->cmdlog[i].jiffies,
                             priv->cmdlog[i].retcode, priv->cmdlog[i].cmd.cmd,
                             priv->cmdlog[i].cmd.len);
                len +=
                    snprintk_buf(buf + len, PAGE_SIZE - len,
                                 (u8 *) priv->cmdlog[i].cmd.param,
                                 priv->cmdlog[i].cmd.len);
                len += snprintf(buf + len, PAGE_SIZE - len, "\n");
        }
        len += snprintf(buf + len, PAGE_SIZE - len, "\n");
        return len;
}

static DEVICE_ATTR(cmd_log, S_IRUGO, show_cmd_log, NULL);

#ifdef CONFIG_IPW2200_PROMISCUOUS
static void ipw_prom_free(struct ipw_priv *priv);
static int ipw_prom_alloc(struct ipw_priv *priv);
static ssize_t store_rtap_iface(struct device *d,
                         struct device_attribute *attr,
                         const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        int rc = 0;

        if (count < 1)
                return -EINVAL;

        switch (buf[0]) {
        case '0':
                if (!rtap_iface)
                        return count;

                if (netif_running(priv->prom_net_dev)) {
                        IPW_WARNING("Interface is up.  Cannot unregister.\n");
                        return count;
                }

                ipw_prom_free(priv);
                rtap_iface = 0;
                break;

        case '1':
                if (rtap_iface)
                        return count;

                rc = ipw_prom_alloc(priv);
                if (!rc)
                        rtap_iface = 1;
                break;

        default:
                return -EINVAL;
        }

        if (rc) {
                IPW_ERROR("Failed to register promiscuous network "
                          "device (error %d).\n", rc);
        }

        return count;
}

static ssize_t show_rtap_iface(struct device *d,
                        struct device_attribute *attr,
                        char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        if (rtap_iface)
                return sprintf(buf, "%s", priv->prom_net_dev->name);
        else {
                buf[0] = '-';
                buf[1] = '1';
                buf[2] = '\0';
                return 3;
        }
}

static DEVICE_ATTR(rtap_iface, S_IWUSR | S_IRUSR, show_rtap_iface,
                   store_rtap_iface);

static ssize_t store_rtap_filter(struct device *d,
                         struct device_attribute *attr,
                         const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        if (!priv->prom_priv) {
                IPW_ERROR("Attempting to set filter without "
                          "rtap_iface enabled.\n");
                return -EPERM;
        }

        priv->prom_priv->filter = simple_strtol(buf, NULL, 0);

        IPW_DEBUG_INFO("Setting rtap filter to " BIT_FMT16 "\n",
                       BIT_ARG16(priv->prom_priv->filter));

        return count;
}

static ssize_t show_rtap_filter(struct device *d,
                        struct device_attribute *attr,
                        char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        return sprintf(buf, "0x%04X",
                       priv->prom_priv ? priv->prom_priv->filter : 0);
}

static DEVICE_ATTR(rtap_filter, S_IWUSR | S_IRUSR, show_rtap_filter,
                   store_rtap_filter);
#endif

static ssize_t show_scan_age(struct device *d, struct device_attribute *attr,
                             char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        return sprintf(buf, "%d\n", priv->ieee->scan_age);
}

static ssize_t store_scan_age(struct device *d, struct device_attribute *attr,
                              const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        struct net_device *dev = priv->net_dev;
        char buffer[] = "00000000";
        unsigned long len =
            (sizeof(buffer) - 1) > count ? count : sizeof(buffer) - 1;
        unsigned long val;
        char *p = buffer;

        IPW_DEBUG_INFO("enter\n");

        strncpy(buffer, buf, len);
        buffer[len] = 0;

        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
                p++;
                if (p[0] == 'x' || p[0] == 'X')
                        p++;
                val = simple_strtoul(p, &p, 16);
        } else
                val = simple_strtoul(p, &p, 10);
        if (p == buffer) {
                IPW_DEBUG_INFO("%s: user supplied invalid value.\n", dev->name);
        } else {
                priv->ieee->scan_age = val;
                IPW_DEBUG_INFO("set scan_age = %u\n", priv->ieee->scan_age);
        }

        IPW_DEBUG_INFO("exit\n");
        return len;
}

static DEVICE_ATTR(scan_age, S_IWUSR | S_IRUGO, show_scan_age, store_scan_age);

static ssize_t show_led(struct device *d, struct device_attribute *attr,
                        char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        return sprintf(buf, "%d\n", (priv->config & CFG_NO_LED) ? 0 : 1);
}

static ssize_t store_led(struct device *d, struct device_attribute *attr,
                         const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        IPW_DEBUG_INFO("enter\n");

        if (count == 0)
                return 0;

        if (*buf == 0) {
                IPW_DEBUG_LED("Disabling LED control.\n");
                priv->config |= CFG_NO_LED;
                ipw_led_shutdown(priv);
        } else {
                IPW_DEBUG_LED("Enabling LED control.\n");
                priv->config &= ~CFG_NO_LED;
                ipw_led_init(priv);
        }

        IPW_DEBUG_INFO("exit\n");
        return count;
}

static DEVICE_ATTR(led, S_IWUSR | S_IRUGO, show_led, store_led);

static ssize_t show_status(struct device *d,
                           struct device_attribute *attr, char *buf)
{
        struct ipw_priv *p = dev_get_drvdata(d);
        return sprintf(buf, "0x%08x\n", (int)p->status);
}

static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

static ssize_t show_cfg(struct device *d, struct device_attribute *attr,
                        char *buf)
{
        struct ipw_priv *p = dev_get_drvdata(d);
        return sprintf(buf, "0x%08x\n", (int)p->config);
}

static DEVICE_ATTR(cfg, S_IRUGO, show_cfg, NULL);

static ssize_t show_nic_type(struct device *d,
                             struct device_attribute *attr, char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        return sprintf(buf, "TYPE: %d\n", priv->nic_type);
}

static DEVICE_ATTR(nic_type, S_IRUGO, show_nic_type, NULL);

static ssize_t show_ucode_version(struct device *d,
                                  struct device_attribute *attr, char *buf)
{
        u32 len = sizeof(u32), tmp = 0;
        struct ipw_priv *p = dev_get_drvdata(d);

        if (ipw_get_ordinal(p, IPW_ORD_STAT_UCODE_VERSION, &tmp, &len))
                return 0;

        return sprintf(buf, "0x%08x\n", tmp);
}

static DEVICE_ATTR(ucode_version, S_IWUSR | S_IRUGO, show_ucode_version, NULL);

static ssize_t show_rtc(struct device *d, struct device_attribute *attr,
                        char *buf)
{
        u32 len = sizeof(u32), tmp = 0;
        struct ipw_priv *p = dev_get_drvdata(d);

        if (ipw_get_ordinal(p, IPW_ORD_STAT_RTC, &tmp, &len))
                return 0;

        return sprintf(buf, "0x%08x\n", tmp);
}

static DEVICE_ATTR(rtc, S_IWUSR | S_IRUGO, show_rtc, NULL);

/*
 * Add a device attribute to view/control the delay between eeprom
 * operations.
 */
static ssize_t show_eeprom_delay(struct device *d,
                                 struct device_attribute *attr, char *buf)
{
        struct ipw_priv *p = dev_get_drvdata(d);
        int n = p->eeprom_delay;
        return sprintf(buf, "%i\n", n);
}
static ssize_t store_eeprom_delay(struct device *d,
                                  struct device_attribute *attr,
                                  const char *buf, size_t count)
{
        struct ipw_priv *p = dev_get_drvdata(d);
        sscanf(buf, "%i", &p->eeprom_delay);
        return strnlen(buf, count);
}

static DEVICE_ATTR(eeprom_delay, S_IWUSR | S_IRUGO,
                   show_eeprom_delay, store_eeprom_delay);

static ssize_t show_command_event_reg(struct device *d,
                                      struct device_attribute *attr, char *buf)
{
        u32 reg = 0;
        struct ipw_priv *p = dev_get_drvdata(d);

        reg = ipw_read_reg32(p, IPW_INTERNAL_CMD_EVENT);
        return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_command_event_reg(struct device *d,
                                       struct device_attribute *attr,
                                       const char *buf, size_t count)
{
        u32 reg;
        struct ipw_priv *p = dev_get_drvdata(d);

        sscanf(buf, "%x", &reg);
        ipw_write_reg32(p, IPW_INTERNAL_CMD_EVENT, reg);
        return strnlen(buf, count);
}

static DEVICE_ATTR(command_event_reg, S_IWUSR | S_IRUGO,
                   show_command_event_reg, store_command_event_reg);

static ssize_t show_mem_gpio_reg(struct device *d,
                                 struct device_attribute *attr, char *buf)
{
        u32 reg = 0;
        struct ipw_priv *p = dev_get_drvdata(d);

        reg = ipw_read_reg32(p, 0x301100);
        return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_mem_gpio_reg(struct device *d,
                                  struct device_attribute *attr,
                                  const char *buf, size_t count)
{
        u32 reg;
        struct ipw_priv *p = dev_get_drvdata(d);

        sscanf(buf, "%x", &reg);
        ipw_write_reg32(p, 0x301100, reg);
        return strnlen(buf, count);
}

static DEVICE_ATTR(mem_gpio_reg, S_IWUSR | S_IRUGO,
                   show_mem_gpio_reg, store_mem_gpio_reg);

static ssize_t show_indirect_dword(struct device *d,
                                   struct device_attribute *attr, char *buf)
{
        u32 reg = 0;
        struct ipw_priv *priv = dev_get_drvdata(d);

        if (priv->status & STATUS_INDIRECT_DWORD)
                reg = ipw_read_reg32(priv, priv->indirect_dword);
        else
                reg = 0;

        return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_indirect_dword(struct device *d,
                                    struct device_attribute *attr,
                                    const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        sscanf(buf, "%x", &priv->indirect_dword);
        priv->status |= STATUS_INDIRECT_DWORD;
        return strnlen(buf, count);
}

static DEVICE_ATTR(indirect_dword, S_IWUSR | S_IRUGO,
                   show_indirect_dword, store_indirect_dword);

static ssize_t show_indirect_byte(struct device *d,
                                  struct device_attribute *attr, char *buf)
{
        u8 reg = 0;
        struct ipw_priv *priv = dev_get_drvdata(d);

        if (priv->status & STATUS_INDIRECT_BYTE)
                reg = ipw_read_reg8(priv, priv->indirect_byte);
        else
                reg = 0;

        return sprintf(buf, "0x%02x\n", reg);
}
static ssize_t store_indirect_byte(struct device *d,
                                   struct device_attribute *attr,
                                   const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        sscanf(buf, "%x", &priv->indirect_byte);
        priv->status |= STATUS_INDIRECT_BYTE;
        return strnlen(buf, count);
}

static DEVICE_ATTR(indirect_byte, S_IWUSR | S_IRUGO,
                   show_indirect_byte, store_indirect_byte);

static ssize_t show_direct_dword(struct device *d,
                                 struct device_attribute *attr, char *buf)
{
        u32 reg = 0;
        struct ipw_priv *priv = dev_get_drvdata(d);

        if (priv->status & STATUS_DIRECT_DWORD)
                reg = ipw_read32(priv, priv->direct_dword);
        else
                reg = 0;

        return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_direct_dword(struct device *d,
                                  struct device_attribute *attr,
                                  const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        sscanf(buf, "%x", &priv->direct_dword);
        priv->status |= STATUS_DIRECT_DWORD;
        return strnlen(buf, count);
}

static DEVICE_ATTR(direct_dword, S_IWUSR | S_IRUGO,
                   show_direct_dword, store_direct_dword);

static int rf_kill_active(struct ipw_priv *priv)
{
        if (0 == (ipw_read32(priv, 0x30) & 0x10000)) {
                priv->status |= STATUS_RF_KILL_HW;
                wiphy_rfkill_set_hw_state(priv->ieee->wdev.wiphy, true);
        } else {
                priv->status &= ~STATUS_RF_KILL_HW;
                wiphy_rfkill_set_hw_state(priv->ieee->wdev.wiphy, false);
        }

        return (priv->status & STATUS_RF_KILL_HW) ? 1 : 0;
}

static ssize_t show_rf_kill(struct device *d, struct device_attribute *attr,
                            char *buf)
{
        /* 0 - RF kill not enabled
           1 - SW based RF kill active (sysfs)
           2 - HW based RF kill active
           3 - Both HW and SW baed RF kill active */
        struct ipw_priv *priv = dev_get_drvdata(d);
        int val = ((priv->status & STATUS_RF_KILL_SW) ? 0x1 : 0x0) |
            (rf_kill_active(priv) ? 0x2 : 0x0);
        return sprintf(buf, "%i\n", val);
}

static int ipw_radio_kill_sw(struct ipw_priv *priv, int disable_radio)
{
        if ((disable_radio ? 1 : 0) ==
            ((priv->status & STATUS_RF_KILL_SW) ? 1 : 0))
                return 0;

        IPW_DEBUG_RF_KILL("Manual SW RF Kill set to: RADIO  %s\n",
                          disable_radio ? "OFF" : "ON");

        if (disable_radio) {
                priv->status |= STATUS_RF_KILL_SW;

                cancel_delayed_work(&priv->request_scan);
                cancel_delayed_work(&priv->request_direct_scan);
                cancel_delayed_work(&priv->request_passive_scan);
                cancel_delayed_work(&priv->scan_event);
                schedule_work(&priv->down);
        } else {
                priv->status &= ~STATUS_RF_KILL_SW;
                if (rf_kill_active(priv)) {
                        IPW_DEBUG_RF_KILL("Can not turn radio back on - "
                                          "disabled by HW switch\n");
                        /* Make sure the RF_KILL check timer is running */
                        cancel_delayed_work(&priv->rf_kill);
                        schedule_delayed_work(&priv->rf_kill,
                                              round_jiffies_relative(2 * HZ));
                } else
                        schedule_work(&priv->up);
        }

        return 1;
}

static ssize_t store_rf_kill(struct device *d, struct device_attribute *attr,
                             const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);

        ipw_radio_kill_sw(priv, buf[0] == '1');

        return count;
}

static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);

static ssize_t show_speed_scan(struct device *d, struct device_attribute *attr,
                               char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        int pos = 0, len = 0;
        if (priv->config & CFG_SPEED_SCAN) {
                while (priv->speed_scan[pos] != 0)
                        len += sprintf(&buf[len], "%d ",
                                       priv->speed_scan[pos++]);
                return len + sprintf(&buf[len], "\n");
        }

        return sprintf(buf, "0\n");
}

static ssize_t store_speed_scan(struct device *d, struct device_attribute *attr,
                                const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        int channel, pos = 0;
        const char *p = buf;

        /* list of space separated channels to scan, optionally ending with 0 */
        while ((channel = simple_strtol(p, NULL, 0))) {
                if (pos == MAX_SPEED_SCAN - 1) {
                        priv->speed_scan[pos] = 0;
                        break;
                }

                if (libipw_is_valid_channel(priv->ieee, channel))
                        priv->speed_scan[pos++] = channel;
                else
                        IPW_WARNING("Skipping invalid channel request: %d\n",
                                    channel);
                p = strchr(p, ' ');
                if (!p)
                        break;
                while (*p == ' ' || *p == '\t')
                        p++;
        }

        if (pos == 0)
                priv->config &= ~CFG_SPEED_SCAN;
        else {
                priv->speed_scan_pos = 0;
                priv->config |= CFG_SPEED_SCAN;
        }

        return count;
}

static DEVICE_ATTR(speed_scan, S_IWUSR | S_IRUGO, show_speed_scan,
                   store_speed_scan);

static ssize_t show_net_stats(struct device *d, struct device_attribute *attr,
                              char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        return sprintf(buf, "%c\n", (priv->config & CFG_NET_STATS) ? '1' : '0');
}

static ssize_t store_net_stats(struct device *d, struct device_attribute *attr,
                               const char *buf, size_t count)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        if (buf[0] == '1')
                priv->config |= CFG_NET_STATS;
        else
                priv->config &= ~CFG_NET_STATS;

        return count;
}

static DEVICE_ATTR(net_stats, S_IWUSR | S_IRUGO,
                   show_net_stats, store_net_stats);

static ssize_t show_channels(struct device *d,
                             struct device_attribute *attr,
                             char *buf)
{
        struct ipw_priv *priv = dev_get_drvdata(d);
        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
        int len = 0, i;

        len = sprintf(&buf[len],
                      "Displaying %d channels in 2.4Ghz band "
                      "(802.11bg):\n", geo->bg_channels);

        for (i = 0; i < geo->bg_channels; i++) {
                len += sprintf(&buf[len], "%d: BSS%s%s, %s, Band %s.\n",
                               geo->bg[i].channel,
                               geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT ?
                               " (radar spectrum)" : "",
                               ((geo->bg[i].flags & LIBIPW_CH_NO_IBSS) ||
                                (geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT))
                               ? "" : ", IBSS",
                               geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY ?
                               "passive only" : "active/passive",
                               geo->bg[i].flags & LIBIPW_CH_B_ONLY ?
                               "B" : "B/G");
        }

        len += sprintf(&buf[len],
                       "Displaying %d channels in 5.2Ghz band "
                       "(802.11a):\n", geo->a_channels);
        for (i = 0; i < geo->a_channels; i++) {
                len += sprintf(&buf[len], "%d: BSS%s%s, %s.\n",
                               geo->a[i].channel,
                               geo->a[i].flags & LIBIPW_CH_RADAR_DETECT ?
                               " (radar spectrum)" : "",
                               ((geo->a[i].flags & LIBIPW_CH_NO_IBSS) ||
                                (geo->a[i].flags & LIBIPW_CH_RADAR_DETECT))
                               ? "" : ", IBSS",
                               geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY ?
                               "passive only" : "active/passive");
        }

        return len;
}

static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);

static void notify_wx_assoc_event(struct ipw_priv *priv)
{
        union iwreq_data wrqu;
        wrqu.ap_addr.sa_family = ARPHRD_ETHER;
        if (priv->status & STATUS_ASSOCIATED)
                memcpy(wrqu.ap_addr.sa_data, priv->bssid, ETH_ALEN);
        else
                eth_zero_addr(wrqu.ap_addr.sa_data);
        wireless_send_event(priv->net_dev, SIOCGIWAP, &wrqu, NULL);
}

static void ipw_irq_tasklet(struct ipw_priv *priv)
{
        u32 inta, inta_mask, handled = 0;
        unsigned long flags;
        int rc = 0;

        spin_lock_irqsave(&priv->irq_lock, flags);

        inta = ipw_read32(priv, IPW_INTA_RW);
        inta_mask = ipw_read32(priv, IPW_INTA_MASK_R);

        if (inta == 0xFFFFFFFF) {
                /* Hardware disappeared */
                IPW_WARNING("TASKLET INTA == 0xFFFFFFFF\n");
                /* Only handle the cached INTA values */
                inta = 0;
        }
        inta &= (IPW_INTA_MASK_ALL & inta_mask);

        /* Add any cached INTA values that need to be handled */
        inta |= priv->isr_inta;

        spin_unlock_irqrestore(&priv->irq_lock, flags);

        spin_lock_irqsave(&priv->lock, flags);

        /* handle all the justifications for the interrupt */
        if (inta & IPW_INTA_BIT_RX_TRANSFER) {
                ipw_rx(priv);
                handled |= IPW_INTA_BIT_RX_TRANSFER;
        }

        if (inta & IPW_INTA_BIT_TX_CMD_QUEUE) {
                IPW_DEBUG_HC("Command completed.\n");
                rc = ipw_queue_tx_reclaim(priv, &priv->txq_cmd, -1);
                priv->status &= ~STATUS_HCMD_ACTIVE;
                wake_up_interruptible(&priv->wait_command_queue);
                handled |= IPW_INTA_BIT_TX_CMD_QUEUE;
        }

        if (inta & IPW_INTA_BIT_TX_QUEUE_1) {
                IPW_DEBUG_TX("TX_QUEUE_1\n");
                rc = ipw_queue_tx_reclaim(priv, &priv->txq[0], 0);
                handled |= IPW_INTA_BIT_TX_QUEUE_1;
        }

        if (inta & IPW_INTA_BIT_TX_QUEUE_2) {
                IPW_DEBUG_TX("TX_QUEUE_2\n");
                rc = ipw_queue_tx_reclaim(priv, &priv->txq[1], 1);
                handled |= IPW_INTA_BIT_TX_QUEUE_2;
        }

        if (inta & IPW_INTA_BIT_TX_QUEUE_3) {
                IPW_DEBUG_TX("TX_QUEUE_3\n");
                rc = ipw_queue_tx_reclaim(priv, &priv->txq[2], 2);
                handled |= IPW_INTA_BIT_TX_QUEUE_3;
        }

        if (inta & IPW_INTA_BIT_TX_QUEUE_4) {
                IPW_DEBUG_TX("TX_QUEUE_4\n");
                rc = ipw_queue_tx_reclaim(priv, &priv->txq[3], 3);
                handled |= IPW_INTA_BIT_TX_QUEUE_4;
        }

        if (inta & IPW_INTA_BIT_STATUS_CHANGE) {
                IPW_WARNING("STATUS_CHANGE\n");
                handled |= IPW_INTA_BIT_STATUS_CHANGE;
        }

        if (inta & IPW_INTA_BIT_BEACON_PERIOD_EXPIRED) {
                IPW_WARNING("TX_PERIOD_EXPIRED\n");
                handled |= IPW_INTA_BIT_BEACON_PERIOD_EXPIRED;
        }

        if (inta & IPW_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE) {
                IPW_WARNING("HOST_CMD_DONE\n");
                handled |= IPW_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE;
        }

        if (inta & IPW_INTA_BIT_FW_INITIALIZATION_DONE) {
                IPW_WARNING("FW_INITIALIZATION_DONE\n");
                handled |= IPW_INTA_BIT_FW_INITIALIZATION_DONE;
        }

        if (inta & IPW_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE) {
                IPW_WARNING("PHY_OFF_DONE\n");
                handled |= IPW_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE;
        }

        if (inta & IPW_INTA_BIT_RF_KILL_DONE) {
                IPW_DEBUG_RF_KILL("RF_KILL_DONE\n");
                priv->status |= STATUS_RF_KILL_HW;
                wiphy_rfkill_set_hw_state(priv->ieee->wdev.wiphy, true);
                wake_up_interruptible(&priv->wait_command_queue);
                priv->status &= ~(STATUS_ASSOCIATED | STATUS_ASSOCIATING);
                cancel_delayed_work(&priv->request_scan);
                cancel_delayed_work(&priv->request_direct_scan);
                cancel_delayed_work(&priv->request_passive_scan);
                cancel_delayed_work(&priv->scan_event);
                schedule_work(&priv->link_down);
                schedule_delayed_work(&priv->rf_kill, 2 * HZ);
                handled |= IPW_INTA_BIT_RF_KILL_DONE;
        }

        if (inta & IPW_INTA_BIT_FATAL_ERROR) {
                IPW_WARNING("Firmware error detected.  Restarting.\n");
                if (priv->error) {
                        IPW_DEBUG_FW("Sysfs 'error' log already exists.\n");
                        if (ipw_debug_level & IPW_DL_FW_ERRORS) {
                                struct ipw_fw_error *error =
                                    ipw_alloc_error_log(priv);
                                ipw_dump_error_log(priv, error);
                                kfree(error);
                        }
                } else {
                        priv->error = ipw_alloc_error_log(priv);
                        if (priv->error)
                                IPW_DEBUG_FW("Sysfs 'error' log captured.\n");
                        else
                                IPW_DEBUG_FW("Error allocating sysfs 'error' "
                                             "log.\n");
                        if (ipw_debug_level & IPW_DL_FW_ERRORS)
                                ipw_dump_error_log(priv, priv->error);
                }

                /* XXX: If hardware encryption is for WPA/WPA2,
                 * we have to notify the supplicant. */
                if (priv->ieee->sec.encrypt) {
                        priv->status &= ~STATUS_ASSOCIATED;
                        notify_wx_assoc_event(priv);
                }

                /* Keep the restart process from trying to send host
                 * commands by clearing the INIT status bit */
                priv->status &= ~STATUS_INIT;

                /* Cancel currently queued command. */
                priv->status &= ~STATUS_HCMD_ACTIVE;
                wake_up_interruptible(&priv->wait_command_queue);

                schedule_work(&priv->adapter_restart);
                handled |= IPW_INTA_BIT_FATAL_ERROR;
        }

        if (inta & IPW_INTA_BIT_PARITY_ERROR) {
                IPW_ERROR("Parity error\n");
                handled |= IPW_INTA_BIT_PARITY_ERROR;
        }

        if (handled != inta) {
                IPW_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
        }

        spin_unlock_irqrestore(&priv->lock, flags);

        /* enable all interrupts */
        ipw_enable_interrupts(priv);
}

#define IPW_CMD(x) case IPW_CMD_ ## x : return #x
static char *get_cmd_string(u8 cmd)
{
        switch (cmd) {
                IPW_CMD(HOST_COMPLETE);
                IPW_CMD(POWER_DOWN);
                IPW_CMD(SYSTEM_CONFIG);
                IPW_CMD(MULTICAST_ADDRESS);
                IPW_CMD(SSID);
                IPW_CMD(ADAPTER_ADDRESS);
                IPW_CMD(PORT_TYPE);
                IPW_CMD(RTS_THRESHOLD);
                IPW_CMD(FRAG_THRESHOLD);
                IPW_CMD(POWER_MODE);
                IPW_CMD(WEP_KEY);
                IPW_CMD(TGI_TX_KEY);
                IPW_CMD(SCAN_REQUEST);
                IPW_CMD(SCAN_REQUEST_EXT);
                IPW_CMD(ASSOCIATE);
                IPW_CMD(SUPPORTED_RATES);
                IPW_CMD(SCAN_ABORT);
                IPW_CMD(TX_FLUSH);
                IPW_CMD(QOS_PARAMETERS);
                IPW_CMD(DINO_CONFIG);
                IPW_CMD(RSN_CAPABILITIES);
                IPW_CMD(RX_KEY);
                IPW_CMD(CARD_DISABLE);
                IPW_CMD(SEED_NUMBER);
                IPW_CMD(TX_POWER);
                IPW_CMD(COUNTRY_INFO);
                IPW_CMD(AIRONET_INFO);
                IPW_CMD(AP_TX_POWER);
                IPW_CMD(CCKM_INFO);
                IPW_CMD(CCX_VER_INFO);
                IPW_CMD(SET_CALIBRATION);
                IPW_CMD(SENSITIVITY_CALIB);
                IPW_CMD(RETRY_LIMIT);
                IPW_CMD(IPW_PRE_POWER_DOWN);
                IPW_CMD(VAP_BEACON_TEMPLATE);
                IPW_CMD(VAP_DTIM_PERIOD);
                IPW_CMD(EXT_SUPPORTED_RATES);
                IPW_CMD(VAP_LOCAL_TX_PWR_CONSTRAINT);
                IPW_CMD(VAP_QUIET_INTERVALS);
                IPW_CMD(VAP_CHANNEL_SWITCH);
                IPW_CMD(VAP_MANDATORY_CHANNELS);
                IPW_CMD(VAP_CELL_PWR_LIMIT);
                IPW_CMD(VAP_CF_PARAM_SET);
                IPW_CMD(VAP_SET_BEACONING_STATE);
                IPW_CMD(MEASUREMENT);
                IPW_CMD(POWER_CAPABILITY);
                IPW_CMD(SUPPORTED_CHANNELS);
                IPW_CMD(TPC_REPORT);
                IPW_CMD(WME_INFO);
                IPW_CMD(PRODUCTION_COMMAND);
        default:
                return "UNKNOWN";
        }
}

#define HOST_COMPLETE_TIMEOUT HZ

static int __ipw_send_cmd(struct ipw_priv *priv, struct host_cmd *cmd)
{
        int rc = 0;
        unsigned long flags;
        unsigned long now, end;

        spin_lock_irqsave(&priv->lock, flags);
        if (priv->status & STATUS_HCMD_ACTIVE) {
                IPW_ERROR("Failed to send %s: Already sending a command.\n",
                          get_cmd_string(cmd->cmd));
                spin_unlock_irqrestore(&priv->lock, flags);
                return -EAGAIN;
        }

        priv->status |= STATUS_HCMD_ACTIVE;

        if (priv->cmdlog) {
                priv->cmdlog[priv->cmdlog_pos].jiffies = jiffies;
                priv->cmdlog[priv->cmdlog_pos].cmd.cmd = cmd->cmd;
                priv->cmdlog[priv->cmdlog_pos].cmd.len = cmd->len;
                memcpy(priv->cmdlog[priv->cmdlog_pos].cmd.param, cmd->param,
                       cmd->len);
                priv->cmdlog[priv->cmdlog_pos].retcode = -1;
        }

        IPW_DEBUG_HC("%s command (#%d) %d bytes: 0x%08X\n",
                     get_cmd_string(cmd->cmd), cmd->cmd, cmd->len,
                     priv->status);

#ifndef DEBUG_CMD_WEP_KEY
        if (cmd->cmd == IPW_CMD_WEP_KEY)
                IPW_DEBUG_HC("WEP_KEY command masked out for secure.\n");
        else
#endif
                printk_buf(IPW_DL_HOST_COMMAND, (u8 *) cmd->param, cmd->len);

        rc = ipw_queue_tx_hcmd(priv, cmd->cmd, cmd->param, cmd->len, 0);
        if (rc) {
                priv->status &= ~STATUS_HCMD_ACTIVE;
                IPW_ERROR("Failed to send %s: Reason %d\n",
                          get_cmd_string(cmd->cmd), rc);
                spin_unlock_irqrestore(&priv->lock, flags);
                goto exit;
        }
        spin_unlock_irqrestore(&priv->lock, flags);

        now = jiffies;
        end = now + HOST_COMPLETE_TIMEOUT;
again:
        rc = wait_event_interruptible_timeout(priv->wait_command_queue,
                                              !(priv->
                                                status & STATUS_HCMD_ACTIVE),
                                              end - now);
        if (rc < 0) {
                now = jiffies;
                if (time_before(now, end))
                        goto again;
                rc = 0;
        }

        if (rc == 0) {
                spin_lock_irqsave(&priv->lock, flags);
                if (priv->status & STATUS_HCMD_ACTIVE) {
                        IPW_ERROR("Failed to send %s: Command timed out.\n",
                                  get_cmd_string(cmd->cmd));
                        priv->status &= ~STATUS_HCMD_ACTIVE;
                        spin_unlock_irqrestore(&priv->lock, flags);
                        rc = -EIO;
                        goto exit;
                }
                spin_unlock_irqrestore(&priv->lock, flags);
        } else
                rc = 0;

        if (priv->status & STATUS_RF_KILL_HW) {
                IPW_ERROR("Failed to send %s: Aborted due to RF kill switch.\n",
                          get_cmd_string(cmd->cmd));
                rc = -EIO;
                goto exit;
        }

      exit:
        if (priv->cmdlog) {
                priv->cmdlog[priv->cmdlog_pos++].retcode = rc;
                priv->cmdlog_pos %= priv->cmdlog_len;
        }
        return rc;
}

static int ipw_send_cmd_simple(struct ipw_priv *priv, u8 command)
{
        struct host_cmd cmd = {
                .cmd = command,
        };

        return __ipw_send_cmd(priv, &cmd);
}

static int ipw_send_cmd_pdu(struct ipw_priv *priv, u8 command, u8 len,
                            void *data)
{
        struct host_cmd cmd = {
                .cmd = command,
                .len = len,
                .param = data,
        };

        return __ipw_send_cmd(priv, &cmd);
}

static int ipw_send_host_complete(struct ipw_priv *priv)
{
        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_simple(priv, IPW_CMD_HOST_COMPLETE);
}

static int ipw_send_system_config(struct ipw_priv *priv)
{
        return ipw_send_cmd_pdu(priv, IPW_CMD_SYSTEM_CONFIG,
                                sizeof(priv->sys_config),
                                &priv->sys_config);
}

static int ipw_send_ssid(struct ipw_priv *priv, u8 * ssid, int len)
{
        if (!priv || !ssid) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_SSID, min(len, IW_ESSID_MAX_SIZE),
                                ssid);
}

static int ipw_send_adapter_address(struct ipw_priv *priv, u8 * mac)
{
        if (!priv || !mac) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        IPW_DEBUG_INFO("%s: Setting MAC to %pM\n",
                       priv->net_dev->name, mac);

        return ipw_send_cmd_pdu(priv, IPW_CMD_ADAPTER_ADDRESS, ETH_ALEN, mac);
}

static void ipw_adapter_restart(void *adapter)
{
        struct ipw_priv *priv = adapter;

        if (priv->status & STATUS_RF_KILL_MASK)
                return;

        ipw_down(priv);

        if (priv->assoc_network &&
            (priv->assoc_network->capability & WLAN_CAPABILITY_IBSS))
                ipw_remove_current_network(priv);

        if (ipw_up(priv)) {
                IPW_ERROR("Failed to up device\n");
                return;
        }
}

static void ipw_bg_adapter_restart(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, adapter_restart);
        mutex_lock(&priv->mutex);
        ipw_adapter_restart(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_abort_scan(struct ipw_priv *priv);

#define IPW_SCAN_CHECK_WATCHDOG (5 * HZ)

static void ipw_scan_check(void *data)
{
        struct ipw_priv *priv = data;

        if (priv->status & STATUS_SCAN_ABORTING) {
                IPW_DEBUG_SCAN("Scan completion watchdog resetting "
                               "adapter after (%dms).\n",
                               jiffies_to_msecs(IPW_SCAN_CHECK_WATCHDOG));
                schedule_work(&priv->adapter_restart);
        } else if (priv->status & STATUS_SCANNING) {
                IPW_DEBUG_SCAN("Scan completion watchdog aborting scan "
                               "after (%dms).\n",
                               jiffies_to_msecs(IPW_SCAN_CHECK_WATCHDOG));
                ipw_abort_scan(priv);
                schedule_delayed_work(&priv->scan_check, HZ);
        }
}

static void ipw_bg_scan_check(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, scan_check.work);
        mutex_lock(&priv->mutex);
        ipw_scan_check(priv);
        mutex_unlock(&priv->mutex);
}

static int ipw_send_scan_request_ext(struct ipw_priv *priv,
                                     struct ipw_scan_request_ext *request)
{
        return ipw_send_cmd_pdu(priv, IPW_CMD_SCAN_REQUEST_EXT,
                                sizeof(*request), request);
}

static int ipw_send_scan_abort(struct ipw_priv *priv)
{
        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_simple(priv, IPW_CMD_SCAN_ABORT);
}

static int ipw_set_sensitivity(struct ipw_priv *priv, u16 sens)
{
        struct ipw_sensitivity_calib calib = {
                .beacon_rssi_raw = cpu_to_le16(sens),
        };

        return ipw_send_cmd_pdu(priv, IPW_CMD_SENSITIVITY_CALIB, sizeof(calib),
                                &calib);
}

static int ipw_send_associate(struct ipw_priv *priv,
                              struct ipw_associate *associate)
{
        if (!priv || !associate) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_ASSOCIATE, sizeof(*associate),
                                associate);
}

static int ipw_send_supported_rates(struct ipw_priv *priv,
                                    struct ipw_supported_rates *rates)
{
        if (!priv || !rates) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_SUPPORTED_RATES, sizeof(*rates),
                                rates);
}

static int ipw_set_random_seed(struct ipw_priv *priv)
{
        u32 val;

        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        get_random_bytes(&val, sizeof(val));

        return ipw_send_cmd_pdu(priv, IPW_CMD_SEED_NUMBER, sizeof(val), &val);
}

static int ipw_send_card_disable(struct ipw_priv *priv, u32 phy_off)
{
        __le32 v = cpu_to_le32(phy_off);
        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_CARD_DISABLE, sizeof(v), &v);
}

static int ipw_send_tx_power(struct ipw_priv *priv, struct ipw_tx_power *power)
{
        if (!priv || !power) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_TX_POWER, sizeof(*power), power);
}

static int ipw_set_tx_power(struct ipw_priv *priv)
{
        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
        struct ipw_tx_power tx_power;
        s8 max_power;
        int i;

        memset(&tx_power, 0, sizeof(tx_power));

        /* configure device for 'G' band */
        tx_power.ieee_mode = IPW_G_MODE;
        tx_power.num_channels = geo->bg_channels;
        for (i = 0; i < geo->bg_channels; i++) {
                max_power = geo->bg[i].max_power;
                tx_power.channels_tx_power[i].channel_number =
                    geo->bg[i].channel;
                tx_power.channels_tx_power[i].tx_power = max_power ?
                    min(max_power, priv->tx_power) : priv->tx_power;
        }
        if (ipw_send_tx_power(priv, &tx_power))
                return -EIO;

        /* configure device to also handle 'B' band */
        tx_power.ieee_mode = IPW_B_MODE;
        if (ipw_send_tx_power(priv, &tx_power))
                return -EIO;

        /* configure device to also handle 'A' band */
        if (priv->ieee->abg_true) {
                tx_power.ieee_mode = IPW_A_MODE;
                tx_power.num_channels = geo->a_channels;
                for (i = 0; i < tx_power.num_channels; i++) {
                        max_power = geo->a[i].max_power;
                        tx_power.channels_tx_power[i].channel_number =
                            geo->a[i].channel;
                        tx_power.channels_tx_power[i].tx_power = max_power ?
                            min(max_power, priv->tx_power) : priv->tx_power;
                }
                if (ipw_send_tx_power(priv, &tx_power))
                        return -EIO;
        }
        return 0;
}

static int ipw_send_rts_threshold(struct ipw_priv *priv, u16 rts)
{
        struct ipw_rts_threshold rts_threshold = {
                .rts_threshold = cpu_to_le16(rts),
        };

        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_RTS_THRESHOLD,
                                sizeof(rts_threshold), &rts_threshold);
}

static int ipw_send_frag_threshold(struct ipw_priv *priv, u16 frag)
{
        struct ipw_frag_threshold frag_threshold = {
                .frag_threshold = cpu_to_le16(frag),
        };

        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_FRAG_THRESHOLD,
                                sizeof(frag_threshold), &frag_threshold);
}

static int ipw_send_power_mode(struct ipw_priv *priv, u32 mode)
{
        __le32 param;

        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        /* If on battery, set to 3, if AC set to CAM, else user
         * level */
        switch (mode) {
        case IPW_POWER_BATTERY:
                param = cpu_to_le32(IPW_POWER_INDEX_3);
                break;
        case IPW_POWER_AC:
                param = cpu_to_le32(IPW_POWER_MODE_CAM);
                break;
        default:
                param = cpu_to_le32(mode);
                break;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_POWER_MODE, sizeof(param),
                                &param);
}

static int ipw_send_retry_limit(struct ipw_priv *priv, u8 slimit, u8 llimit)
{
        struct ipw_retry_limit retry_limit = {
                .short_retry_limit = slimit,
                .long_retry_limit = llimit
        };

        if (!priv) {
                IPW_ERROR("Invalid args\n");
                return -1;
        }

        return ipw_send_cmd_pdu(priv, IPW_CMD_RETRY_LIMIT, sizeof(retry_limit),
                                &retry_limit);
}

/*
 * The IPW device contains a Microwire compatible EEPROM that stores
 * various data like the MAC address.  Usually the firmware has exclusive
 * access to the eeprom, but during device initialization (before the
 * device driver has sent the HostComplete command to the firmware) the
 * device driver has read access to the EEPROM by way of indirect addressing
 * through a couple of memory mapped registers.
 *
 * The following is a simplified implementation for pulling data out of the
 * the eeprom, along with some helper functions to find information in
 * the per device private data's copy of the eeprom.
 *
 * NOTE: To better understand how these functions work (i.e what is a chip
 *       select and why do have to keep driving the eeprom clock?), read
 *       just about any data sheet for a Microwire compatible EEPROM.
 */

/* write a 32 bit value into the indirect accessor register */
static inline void eeprom_write_reg(struct ipw_priv *p, u32 data)
{
        ipw_write_reg32(p, FW_MEM_REG_EEPROM_ACCESS, data);

        /* the eeprom requires some time to complete the operation */
        udelay(p->eeprom_delay);
}

/* perform a chip select operation */
static void eeprom_cs(struct ipw_priv *priv)
{
        eeprom_write_reg(priv, 0);
        eeprom_write_reg(priv, EEPROM_BIT_CS);
        eeprom_write_reg(priv, EEPROM_BIT_CS | EEPROM_BIT_SK);
        eeprom_write_reg(priv, EEPROM_BIT_CS);
}

/* perform a chip select operation */
static void eeprom_disable_cs(struct ipw_priv *priv)
{
        eeprom_write_reg(priv, EEPROM_BIT_CS);
        eeprom_write_reg(priv, 0);
        eeprom_write_reg(priv, EEPROM_BIT_SK);
}

/* push a single bit down to the eeprom */
static inline void eeprom_write_bit(struct ipw_priv *p, u8 bit)
{
        int d = (bit ? EEPROM_BIT_DI : 0);
        eeprom_write_reg(p, EEPROM_BIT_CS | d);
        eeprom_write_reg(p, EEPROM_BIT_CS | d | EEPROM_BIT_SK);
}

/* push an opcode followed by an address down to the eeprom */
static void eeprom_op(struct ipw_priv *priv, u8 op, u8 addr)
{
        int i;

        eeprom_cs(priv);
        eeprom_write_bit(priv, 1);
        eeprom_write_bit(priv, op & 2);
        eeprom_write_bit(priv, op & 1);
        for (i = 7; i >= 0; i--) {
                eeprom_write_bit(priv, addr & (1 << i));
        }
}

/* pull 16 bits off the eeprom, one bit at a time */
static u16 eeprom_read_u16(struct ipw_priv *priv, u8 addr)
{
        int i;
        u16 r = 0;

        /* Send READ Opcode */
        eeprom_op(priv, EEPROM_CMD_READ, addr);

        /* Send dummy bit */
        eeprom_write_reg(priv, EEPROM_BIT_CS);

        /* Read the byte off the eeprom one bit at a time */
        for (i = 0; i < 16; i++) {
                u32 data = 0;
                eeprom_write_reg(priv, EEPROM_BIT_CS | EEPROM_BIT_SK);
                eeprom_write_reg(priv, EEPROM_BIT_CS);
                data = ipw_read_reg32(priv, FW_MEM_REG_EEPROM_ACCESS);
                r = (r << 1) | ((data & EEPROM_BIT_DO) ? 1 : 0);
        }

        /* Send another dummy bit */
        eeprom_write_reg(priv, 0);
        eeprom_disable_cs(priv);

        return r;
}

/* helper function for pulling the mac address out of the private */
/* data's copy of the eeprom data                                 */
static void eeprom_parse_mac(struct ipw_priv *priv, u8 * mac)
{
        memcpy(mac, &priv->eeprom[EEPROM_MAC_ADDRESS], ETH_ALEN);
}

static void ipw_read_eeprom(struct ipw_priv *priv)
{
        int i;
        __le16 *eeprom = (__le16 *) priv->eeprom;

        IPW_DEBUG_TRACE(">>\n");

        /* read entire contents of eeprom into private buffer */
        for (i = 0; i < 128; i++)
                eeprom[i] = cpu_to_le16(eeprom_read_u16(priv, (u8) i));

        IPW_DEBUG_TRACE("<<\n");
}

/*
 * Either the device driver (i.e. the host) or the firmware can
 * load eeprom data into the designated region in SRAM.  If neither
 * happens then the FW will shutdown with a fatal error.
 *
 * In order to signal the FW to load the EEPROM, the EEPROM_LOAD_DISABLE
 * bit needs region of shared SRAM needs to be non-zero.
 */
static void ipw_eeprom_init_sram(struct ipw_priv *priv)
{
        int i;

        IPW_DEBUG_TRACE(">>\n");

        /*
           If the data looks correct, then copy it to our private
           copy.  Otherwise let the firmware know to perform the operation
           on its own.
         */
        if (priv->eeprom[EEPROM_VERSION] != 0) {
                IPW_DEBUG_INFO("Writing EEPROM data into SRAM\n");

                /* write the eeprom data to sram */
                for (i = 0; i < IPW_EEPROM_IMAGE_SIZE; i++)
                        ipw_write8(priv, IPW_EEPROM_DATA + i, priv->eeprom[i]);

                /* Do not load eeprom data on fatal error or suspend */
                ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 0);
        } else {
                IPW_DEBUG_INFO("Enabling FW initializationg of SRAM\n");

                /* Load eeprom data on fatal error or suspend */
                ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 1);
        }

        IPW_DEBUG_TRACE("<<\n");
}

static void ipw_zero_memory(struct ipw_priv *priv, u32 start, u32 count)
{
        count >>= 2;
        if (!count)
                return;
        _ipw_write32(priv, IPW_AUTOINC_ADDR, start);
        while (count--)
                _ipw_write32(priv, IPW_AUTOINC_DATA, 0);
}

static inline void ipw_fw_dma_reset_command_blocks(struct ipw_priv *priv)
{
        ipw_zero_memory(priv, IPW_SHARED_SRAM_DMA_CONTROL,
                        CB_NUMBER_OF_ELEMENTS_SMALL *
                        sizeof(struct command_block));
}

static int ipw_fw_dma_enable(struct ipw_priv *priv)
{                               /* start dma engine but no transfers yet */

        IPW_DEBUG_FW(">> :\n");

        /* Start the dma */
        ipw_fw_dma_reset_command_blocks(priv);

        /* Write CB base address */
        ipw_write_reg32(priv, IPW_DMA_I_CB_BASE, IPW_SHARED_SRAM_DMA_CONTROL);

        IPW_DEBUG_FW("<< :\n");
        return 0;
}

static void ipw_fw_dma_abort(struct ipw_priv *priv)
{
        u32 control = 0;

        IPW_DEBUG_FW(">> :\n");

        /* set the Stop and Abort bit */
        control = DMA_CONTROL_SMALL_CB_CONST_VALUE | DMA_CB_STOP_AND_ABORT;
        ipw_write_reg32(priv, IPW_DMA_I_DMA_CONTROL, control);
        priv->sram_desc.last_cb_index = 0;

        IPW_DEBUG_FW("<<\n");
}

static int ipw_fw_dma_write_command_block(struct ipw_priv *priv, int index,
                                          struct command_block *cb)
{
        u32 address =
            IPW_SHARED_SRAM_DMA_CONTROL +
            (sizeof(struct command_block) * index);
        IPW_DEBUG_FW(">> :\n");

        ipw_write_indirect(priv, address, (u8 *) cb,
                           (int)sizeof(struct command_block));

        IPW_DEBUG_FW("<< :\n");
        return 0;

}

static int ipw_fw_dma_kick(struct ipw_priv *priv)
{
        u32 control = 0;
        u32 index = 0;

        IPW_DEBUG_FW(">> :\n");

        for (index = 0; index < priv->sram_desc.last_cb_index; index++)
                ipw_fw_dma_write_command_block(priv, index,
                                               &priv->sram_desc.cb_list[index]);

        /* Enable the DMA in the CSR register */
        ipw_clear_bit(priv, IPW_RESET_REG,
                      IPW_RESET_REG_MASTER_DISABLED |
                      IPW_RESET_REG_STOP_MASTER);

        /* Set the Start bit. */
        control = DMA_CONTROL_SMALL_CB_CONST_VALUE | DMA_CB_START;
        ipw_write_reg32(priv, IPW_DMA_I_DMA_CONTROL, control);

        IPW_DEBUG_FW("<< :\n");
        return 0;
}

static void ipw_fw_dma_dump_command_block(struct ipw_priv *priv)
{
        u32 address;
        u32 register_value = 0;
        u32 cb_fields_address = 0;

        IPW_DEBUG_FW(">> :\n");
        address = ipw_read_reg32(priv, IPW_DMA_I_CURRENT_CB);
        IPW_DEBUG_FW_INFO("Current CB is 0x%x\n", address);

        /* Read the DMA Controlor register */
        register_value = ipw_read_reg32(priv, IPW_DMA_I_DMA_CONTROL);
        IPW_DEBUG_FW_INFO("IPW_DMA_I_DMA_CONTROL is 0x%x\n", register_value);

        /* Print the CB values */
        cb_fields_address = address;
        register_value = ipw_read_reg32(priv, cb_fields_address);
        IPW_DEBUG_FW_INFO("Current CB Control Field is 0x%x\n", register_value);

        cb_fields_address += sizeof(u32);
        register_value = ipw_read_reg32(priv, cb_fields_address);
        IPW_DEBUG_FW_INFO("Current CB Source Field is 0x%x\n", register_value);

        cb_fields_address += sizeof(u32);
        register_value = ipw_read_reg32(priv, cb_fields_address);
        IPW_DEBUG_FW_INFO("Current CB Destination Field is 0x%x\n",
                          register_value);

        cb_fields_address += sizeof(u32);
        register_value = ipw_read_reg32(priv, cb_fields_address);
        IPW_DEBUG_FW_INFO("Current CB Status Field is 0x%x\n", register_value);

        IPW_DEBUG_FW(">> :\n");
}

static int ipw_fw_dma_command_block_index(struct ipw_priv *priv)
{
        u32 current_cb_address = 0;
        u32 current_cb_index = 0;

        IPW_DEBUG_FW("<< :\n");
        current_cb_address = ipw_read_reg32(priv, IPW_DMA_I_CURRENT_CB);

        current_cb_index = (current_cb_address - IPW_SHARED_SRAM_DMA_CONTROL) /
            sizeof(struct command_block);

        IPW_DEBUG_FW_INFO("Current CB index 0x%x address = 0x%X\n",
                          current_cb_index, current_cb_address);

        IPW_DEBUG_FW(">> :\n");
        return current_cb_index;

}

static int ipw_fw_dma_add_command_block(struct ipw_priv *priv,
                                        u32 src_address,
                                        u32 dest_address,
                                        u32 length,
                                        int interrupt_enabled, int is_last)
{

        u32 control = CB_VALID | CB_SRC_LE | CB_DEST_LE | CB_SRC_AUTOINC |
            CB_SRC_IO_GATED | CB_DEST_AUTOINC | CB_SRC_SIZE_LONG |
            CB_DEST_SIZE_LONG;
        struct command_block *cb;
        u32 last_cb_element = 0;

        IPW_DEBUG_FW_INFO("src_address=0x%x dest_address=0x%x length=0x%x\n",
                          src_address, dest_address, length);

        if (priv->sram_desc.last_cb_index >= CB_NUMBER_OF_ELEMENTS_SMALL)
                return -1;

        last_cb_element = priv->sram_desc.last_cb_index;
        cb = &priv->sram_desc.cb_list[last_cb_element];
        priv->sram_desc.last_cb_index++;

        /* Calculate the new CB control word */
        if (interrupt_enabled)
                control |= CB_INT_ENABLED;

        if (is_last)
                control |= CB_LAST_VALID;

        control |= length;

        /* Calculate the CB Element's checksum value */
        cb->status = control ^ src_address ^ dest_address;

        /* Copy the Source and Destination addresses */
        cb->dest_addr = dest_address;
        cb->source_addr = src_address;

        /* Copy the Control Word last */
        cb->control = control;

        return 0;
}

static int ipw_fw_dma_add_buffer(struct ipw_priv *priv, dma_addr_t *src_address,
                                 int nr, u32 dest_address, u32 len)
{
        int ret, i;
        u32 size;

        IPW_DEBUG_FW(">>\n");
        IPW_DEBUG_FW_INFO("nr=%d dest_address=0x%x len=0x%x\n",
                          nr, dest_address, len);

        for (i = 0; i < nr; i++) {
                size = min_t(u32, len - i * CB_MAX_LENGTH, CB_MAX_LENGTH);
                ret = ipw_fw_dma_add_command_block(priv, src_address[i],
                                                   dest_address +
                                                   i * CB_MAX_LENGTH, size,
                                                   0, 0);
                if (ret) {
                        IPW_DEBUG_FW_INFO(": Failed\n");
                        return -1;
                } else
                        IPW_DEBUG_FW_INFO(": Added new cb\n");
        }

        IPW_DEBUG_FW("<<\n");
        return 0;
}

static int ipw_fw_dma_wait(struct ipw_priv *priv)
{
        u32 current_index = 0, previous_index;
        u32 watchdog = 0;

        IPW_DEBUG_FW(">> :\n");

        current_index = ipw_fw_dma_command_block_index(priv);
        IPW_DEBUG_FW_INFO("sram_desc.last_cb_index:0x%08X\n",
                          (int)priv->sram_desc.last_cb_index);

        while (current_index < priv->sram_desc.last_cb_index) {
                udelay(50);
                previous_index = current_index;
                current_index = ipw_fw_dma_command_block_index(priv);

                if (previous_index < current_index) {
                        watchdog = 0;
                        continue;
                }
                if (++watchdog > 400) {
                        IPW_DEBUG_FW_INFO("Timeout\n");
                        ipw_fw_dma_dump_command_block(priv);
                        ipw_fw_dma_abort(priv);
                        return -1;
                }
        }

        ipw_fw_dma_abort(priv);

        /*Disable the DMA in the CSR register */
        ipw_set_bit(priv, IPW_RESET_REG,
                    IPW_RESET_REG_MASTER_DISABLED | IPW_RESET_REG_STOP_MASTER);

        IPW_DEBUG_FW("<< dmaWaitSync\n");
        return 0;
}

static void ipw_remove_current_network(struct ipw_priv *priv)
{
        struct list_head *element, *safe;
        struct libipw_network *network = NULL;
        unsigned long flags;

        spin_lock_irqsave(&priv->ieee->lock, flags);
        list_for_each_safe(element, safe, &priv->ieee->network_list) {
                network = list_entry(element, struct libipw_network, list);
                if (ether_addr_equal(network->bssid, priv->bssid)) {
                        list_del(element);
                        list_add_tail(&network->list,
                                      &priv->ieee->network_free_list);
                }
        }
        spin_unlock_irqrestore(&priv->ieee->lock, flags);
}

/**
 * Check that card is still alive.
 * Reads debug register from domain0.
 * If card is present, pre-defined value should
 * be found there.
 *
 * @param priv
 * @return 1 if card is present, 0 otherwise
 */
static inline int ipw_alive(struct ipw_priv *priv)
{
        return ipw_read32(priv, 0x90) == 0xd55555d5;
}

/* timeout in msec, attempted in 10-msec quanta */
static int ipw_poll_bit(struct ipw_priv *priv, u32 addr, u32 mask,
                               int timeout)
{
        int i = 0;

        do {
                if ((ipw_read32(priv, addr) & mask) == mask)
                        return i;
                mdelay(10);
                i += 10;
        } while (i < timeout);

        return -ETIME;
}

/* These functions load the firmware and micro code for the operation of
 * the ipw hardware.  It assumes the buffer has all the bits for the
 * image and the caller is handling the memory allocation and clean up.
 */

static int ipw_stop_master(struct ipw_priv *priv)
{
        int rc;

        IPW_DEBUG_TRACE(">>\n");
        /* stop master. typical delay - 0 */
        ipw_set_bit(priv, IPW_RESET_REG, IPW_RESET_REG_STOP_MASTER);

        /* timeout is in msec, polled in 10-msec quanta */
        rc = ipw_poll_bit(priv, IPW_RESET_REG,
                          IPW_RESET_REG_MASTER_DISABLED, 100);
        if (rc < 0) {
                IPW_ERROR("wait for stop master failed after 100ms\n");
                return -1;
        }

        IPW_DEBUG_INFO("stop master %dms\n", rc);

        return rc;
}

static void ipw_arc_release(struct ipw_priv *priv)
{
        IPW_DEBUG_TRACE(">>\n");
        mdelay(5);

        ipw_clear_bit(priv, IPW_RESET_REG, CBD_RESET_REG_PRINCETON_RESET);

        /* no one knows timing, for safety add some delay */
        mdelay(5);
}

struct fw_chunk {
        __le32 address;
        __le32 length;
};

static int ipw_load_ucode(struct ipw_priv *priv, u8 * data, size_t len)
{
        int rc = 0, i, addr;
        u8 cr = 0;
        __le16 *image;

        image = (__le16 *) data;

        IPW_DEBUG_TRACE(">>\n");

        rc = ipw_stop_master(priv);

        if (rc < 0)
                return rc;

        for (addr = IPW_SHARED_LOWER_BOUND;
             addr < IPW_REGISTER_DOMAIN1_END; addr += 4) {
                ipw_write32(priv, addr, 0);
        }

        /* no ucode (yet) */
        memset(&priv->dino_alive, 0, sizeof(priv->dino_alive));
        /* destroy DMA queues */
        /* reset sequence */

        ipw_write_reg32(priv, IPW_MEM_HALT_AND_RESET, IPW_BIT_HALT_RESET_ON);
        ipw_arc_release(priv);
        ipw_write_reg32(priv, IPW_MEM_HALT_AND_RESET, IPW_BIT_HALT_RESET_OFF);
        mdelay(1);

        /* reset PHY */
        ipw_write_reg32(priv, IPW_INTERNAL_CMD_EVENT, IPW_BASEBAND_POWER_DOWN);
        mdelay(1);

        ipw_write_reg32(priv, IPW_INTERNAL_CMD_EVENT, 0);
        mdelay(1);

        /* enable ucode store */
        ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, 0x0);
        ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, DINO_ENABLE_CS);
        mdelay(1);

        /* write ucode */
        /**
         * @bug
         * Do NOT set indirect address register once and then
         * store data to indirect data register in the loop.
         * It seems very reasonable, but in this case DINO do not
         * accept ucode. It is essential to set address each time.
         */
        /* load new ipw uCode */
        for (i = 0; i < len / 2; i++)
                ipw_write_reg16(priv, IPW_BASEBAND_CONTROL_STORE,
                                le16_to_cpu(image[i]));

        /* enable DINO */
        ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, 0);
        ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, DINO_ENABLE_SYSTEM);

        /* this is where the igx / win driver deveates from the VAP driver. */

        /* wait for alive response */
        for (i = 0; i < 100; i++) {
                /* poll for incoming data */
                cr = ipw_read_reg8(priv, IPW_BASEBAND_CONTROL_STATUS);
                if (cr & DINO_RXFIFO_DATA)
                        break;
                mdelay(1);
        }

        if (cr & DINO_RXFIFO_DATA) {
                /* alive_command_responce size is NOT multiple of 4 */
                __le32 response_buffer[(sizeof(priv->dino_alive) + 3) / 4];

                for (i = 0; i < ARRAY_SIZE(response_buffer); i++)
                        response_buffer[i] =
                            cpu_to_le32(ipw_read_reg32(priv,
                                                       IPW_BASEBAND_RX_FIFO_READ));
                memcpy(&priv->dino_alive, response_buffer,
                       sizeof(priv->dino_alive));
                if (priv->dino_alive.alive_command == 1
                    && priv->dino_alive.ucode_valid == 1) {
                        rc = 0;
                        IPW_DEBUG_INFO
                            ("Microcode OK, rev. %d (0x%x) dev. %d (0x%x) "
                             "of %02d/%02d/%02d %02d:%02d\n",
                             priv->dino_alive.software_revision,
                             priv->dino_alive.software_revision,
                             priv->dino_alive.device_identifier,
                             priv->dino_alive.device_identifier,
                             priv->dino_alive.time_stamp[0],
                             priv->dino_alive.time_stamp[1],
                             priv->dino_alive.time_stamp[2],
                             priv->dino_alive.time_stamp[3],
                             priv->dino_alive.time_stamp[4]);
                } else {
                        IPW_DEBUG_INFO("Microcode is not alive\n");
                        rc = -EINVAL;
                }
        } else {
                IPW_DEBUG_INFO("No alive response from DINO\n");
                rc = -ETIME;
        }

        /* disable DINO, otherwise for some reason
           firmware have problem getting alive resp. */
        ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, 0);

        return rc;
}

static int ipw_load_firmware(struct ipw_priv *priv, u8 * data, size_t len)
{
        int ret = -1;
        int offset = 0;
        struct fw_chunk *chunk;
        int total_nr = 0;
        int i;
        struct pci_pool *pool;
        void **virts;
        dma_addr_t *phys;

        IPW_DEBUG_TRACE("<< :\n");

        virts = kmalloc(sizeof(void *) * CB_NUMBER_OF_ELEMENTS_SMALL,
                        GFP_KERNEL);
        if (!virts)
                return -ENOMEM;

        phys = kmalloc(sizeof(dma_addr_t) * CB_NUMBER_OF_ELEMENTS_SMALL,
                        GFP_KERNEL);
        if (!phys) {
                kfree(virts);
                return -ENOMEM;
        }
        pool = pci_pool_create("ipw2200", priv->pci_dev, CB_MAX_LENGTH, 0, 0);
        if (!pool) {
                IPW_ERROR("pci_pool_create failed\n");
                kfree(phys);
                kfree(virts);
                return -ENOMEM;
        }

        /* Start the Dma */
        ret = ipw_fw_dma_enable(priv);

        /* the DMA is already ready this would be a bug. */
        BUG_ON(priv->sram_desc.last_cb_index > 0);

        do {
                u32 chunk_len;
                u8 *start;
                int size;
                int nr = 0;

                chunk = (struct fw_chunk *)(data + offset);
                offset += sizeof(struct fw_chunk);
                chunk_len = le32_to_cpu(chunk->length);
                start = data + offset;

                nr = (chunk_len + CB_MAX_LENGTH - 1) / CB_MAX_LENGTH;
                for (i = 0; i < nr; i++) {
                        virts[total_nr] = pci_pool_alloc(pool, GFP_KERNEL,
                                                         &phys[total_nr]);
                        if (!virts[total_nr]) {
                                ret = -ENOMEM;
                                goto out;
                        }
                        size = min_t(u32, chunk_len - i * CB_MAX_LENGTH,
                                     CB_MAX_LENGTH);
                        memcpy(virts[total_nr], start, size);
                        start += size;
                        total_nr++;
                        /* We don't support fw chunk larger than 64*8K */
                        BUG_ON(total_nr > CB_NUMBER_OF_ELEMENTS_SMALL);
                }

                /* build DMA packet and queue up for sending */
                /* dma to chunk->address, the chunk->length bytes from data +
                 * offeset*/
                /* Dma loading */
                ret = ipw_fw_dma_add_buffer(priv, &phys[total_nr - nr],
                                            nr, le32_to_cpu(chunk->address),
                                            chunk_len);
                if (ret) {
                        IPW_DEBUG_INFO("dmaAddBuffer Failed\n");
                        goto out;
                }

                offset += chunk_len;
        } while (offset < len);

        /* Run the DMA and wait for the answer */
        ret = ipw_fw_dma_kick(priv);
        if (ret) {
                IPW_ERROR("dmaKick Failed\n");
                goto out;
        }

        ret = ipw_fw_dma_wait(priv);
        if (ret) {
                IPW_ERROR("dmaWaitSync Failed\n");
                goto out;
        }
 out:
        for (i = 0; i < total_nr; i++)
                pci_pool_free(pool, virts[i], phys[i]);

        pci_pool_destroy(pool);
        kfree(phys);
        kfree(virts);

        return ret;
}

/* stop nic */
static int ipw_stop_nic(struct ipw_priv *priv)
{
        int rc = 0;

        /* stop */
        ipw_write32(priv, IPW_RESET_REG, IPW_RESET_REG_STOP_MASTER);

        rc = ipw_poll_bit(priv, IPW_RESET_REG,
                          IPW_RESET_REG_MASTER_DISABLED, 500);
        if (rc < 0) {
                IPW_ERROR("wait for reg master disabled failed after 500ms\n");
                return rc;
        }

        ipw_set_bit(priv, IPW_RESET_REG, CBD_RESET_REG_PRINCETON_RESET);

        return rc;
}

static void ipw_start_nic(struct ipw_priv *priv)
{
        IPW_DEBUG_TRACE(">>\n");

        /* prvHwStartNic  release ARC */
        ipw_clear_bit(priv, IPW_RESET_REG,
                      IPW_RESET_REG_MASTER_DISABLED |
                      IPW_RESET_REG_STOP_MASTER |
                      CBD_RESET_REG_PRINCETON_RESET);

        /* enable power management */
        ipw_set_bit(priv, IPW_GP_CNTRL_RW,
                    IPW_GP_CNTRL_BIT_HOST_ALLOWS_STANDBY);

        IPW_DEBUG_TRACE("<<\n");
}

static int ipw_init_nic(struct ipw_priv *priv)
{
        int rc;

        IPW_DEBUG_TRACE(">>\n");
        /* reset */
        /*prvHwInitNic */
        /* set "initialization complete" bit to move adapter to D0 state */
        ipw_set_bit(priv, IPW_GP_CNTRL_RW, IPW_GP_CNTRL_BIT_INIT_DONE);

        /* low-level PLL activation */
        ipw_write32(priv, IPW_READ_INT_REGISTER,
                    IPW_BIT_INT_HOST_SRAM_READ_INT_REGISTER);

        /* wait for clock stabilization */
        rc = ipw_poll_bit(priv, IPW_GP_CNTRL_RW,
                          IPW_GP_CNTRL_BIT_CLOCK_READY, 250);
        if (rc < 0)
                IPW_DEBUG_INFO("FAILED wait for clock stablization\n");

        /* assert SW reset */
        ipw_set_bit(priv, IPW_RESET_REG, IPW_RESET_REG_SW_RESET);

        udelay(10);

        /* set "initialization complete" bit to move adapter to D0 state */
        ipw_set_bit(priv, IPW_GP_CNTRL_RW, IPW_GP_CNTRL_BIT_INIT_DONE);

        IPW_DEBUG_TRACE(">>\n");
        return 0;
}

/* Call this function from process context, it will sleep in request_firmware.
 * Probe is an ok place to call this from.
 */
static int ipw_reset_nic(struct ipw_priv *priv)
{
        int rc = 0;
        unsigned long flags;

        IPW_DEBUG_TRACE(">>\n");

        rc = ipw_init_nic(priv);

        spin_lock_irqsave(&priv->lock, flags);
        /* Clear the 'host command active' bit... */
        priv->status &= ~STATUS_HCMD_ACTIVE;
        wake_up_interruptible(&priv->wait_command_queue);
        priv->status &= ~(STATUS_SCANNING | STATUS_SCAN_ABORTING);
        wake_up_interruptible(&priv->wait_state);
        spin_unlock_irqrestore(&priv->lock, flags);

        IPW_DEBUG_TRACE("<<\n");
        return rc;
}


struct ipw_fw {
        __le32 ver;
        __le32 boot_size;
        __le32 ucode_size;
        __le32 fw_size;
        u8 data[0];
};

static int ipw_get_fw(struct ipw_priv *priv,
                      const struct firmware **raw, const char *name)
{
        struct ipw_fw *fw;
        int rc;

        /* ask firmware_class module to get the boot firmware off disk */
        rc = request_firmware(raw, name, &priv->pci_dev->dev);
        if (rc < 0) {
                IPW_ERROR("%s request_firmware failed: Reason %d\n", name, rc);
                return rc;
        }

        if ((*raw)->size < sizeof(*fw)) {
                IPW_ERROR("%s is too small (%zd)\n", name, (*raw)->size);
                return -EINVAL;
        }

        fw = (void *)(*raw)->data;

        if ((*raw)->size < sizeof(*fw) + le32_to_cpu(fw->boot_size) +
            le32_to_cpu(fw->ucode_size) + le32_to_cpu(fw->fw_size)) {
                IPW_ERROR("%s is too small or corrupt (%zd)\n",
                          name, (*raw)->size);
                return -EINVAL;
        }

        IPW_DEBUG_INFO("Read firmware '%s' image v%d.%d (%zd bytes)\n",
                       name,
                       le32_to_cpu(fw->ver) >> 16,
                       le32_to_cpu(fw->ver) & 0xff,
                       (*raw)->size - sizeof(*fw));
        return 0;
}

#define IPW_RX_BUF_SIZE (3000)

static void ipw_rx_queue_reset(struct ipw_priv *priv,
                                      struct ipw_rx_queue *rxq)
{
        unsigned long flags;
        int i;

        spin_lock_irqsave(&rxq->lock, flags);

        INIT_LIST_HEAD(&rxq->rx_free);
        INIT_LIST_HEAD(&rxq->rx_used);

        /* Fill the rx_used queue with _all_ of the Rx buffers */
        for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
                /* In the reset function, these buffers may have been allocated
                 * to an SKB, so we need to unmap and free potential storage */
                if (rxq->pool[i].skb != NULL) {
                        pci_unmap_single(priv->pci_dev, rxq->pool[i].dma_addr,
                                         IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
                        dev_kfree_skb(rxq->pool[i].skb);
                        rxq->pool[i].skb = NULL;
                }
                list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
        }

        /* Set us so that we have processed and used all buffers, but have
         * not restocked the Rx queue with fresh buffers */
        rxq->read = rxq->write = 0;
        rxq->free_count = 0;
        spin_unlock_irqrestore(&rxq->lock, flags);
}

#ifdef CONFIG_PM
static int fw_loaded = 0;
static const struct firmware *raw = NULL;

static void free_firmware(void)
{
        if (fw_loaded) {
                release_firmware(raw);
                raw = NULL;
                fw_loaded = 0;
        }
}
#else
#define free_firmware() do {} while (0)
#endif

static int ipw_load(struct ipw_priv *priv)
{
#ifndef CONFIG_PM
        const struct firmware *raw = NULL;
#endif
        struct ipw_fw *fw;
        u8 *boot_img, *ucode_img, *fw_img;
        u8 *name = NULL;
        int rc = 0, retries = 3;

        switch (priv->ieee->iw_mode) {
        case IW_MODE_ADHOC:
                name = "ipw2200-ibss.fw";
                break;
#ifdef CONFIG_IPW2200_MONITOR
        case IW_MODE_MONITOR:
                name = "ipw2200-sniffer.fw";
                break;
#endif
        case IW_MODE_INFRA:
                name = "ipw2200-bss.fw";
                break;
        }

        if (!name) {
                rc = -EINVAL;
                goto error;
        }

#ifdef CONFIG_PM
        if (!fw_loaded) {
#endif
                rc = ipw_get_fw(priv, &raw, name);
                if (rc < 0)
                        goto error;
#ifdef CONFIG_PM
        }
#endif

        fw = (void *)raw->data;
        boot_img = &fw->data[0];
        ucode_img = &fw->data[le32_to_cpu(fw->boot_size)];
        fw_img = &fw->data[le32_to_cpu(fw->boot_size) +
                           le32_to_cpu(fw->ucode_size)];

        if (!priv->rxq)
                priv->rxq = ipw_rx_queue_alloc(priv);
        else
                ipw_rx_queue_reset(priv, priv->rxq);
        if (!priv->rxq) {
                IPW_ERROR("Unable to initialize Rx queue\n");
                rc = -ENOMEM;
                goto error;
        }

      retry:
        /* Ensure interrupts are disabled */
        ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
        priv->status &= ~STATUS_INT_ENABLED;

        /* ack pending interrupts */
        ipw_write32(priv, IPW_INTA_RW, IPW_INTA_MASK_ALL);

        ipw_stop_nic(priv);

        rc = ipw_reset_nic(priv);
        if (rc < 0) {
                IPW_ERROR("Unable to reset NIC\n");
                goto error;
        }

        ipw_zero_memory(priv, IPW_NIC_SRAM_LOWER_BOUND,
                        IPW_NIC_SRAM_UPPER_BOUND - IPW_NIC_SRAM_LOWER_BOUND);

        /* DMA the initial boot firmware into the device */
        rc = ipw_load_firmware(priv, boot_img, le32_to_cpu(fw->boot_size));
        if (rc < 0) {
                IPW_ERROR("Unable to load boot firmware: %d\n", rc);
                goto error;
        }

        /* kick start the device */
        ipw_start_nic(priv);

        /* wait for the device to finish its initial startup sequence */
        rc = ipw_poll_bit(priv, IPW_INTA_RW,
                          IPW_INTA_BIT_FW_INITIALIZATION_DONE, 500);
        if (rc < 0) {
                IPW_ERROR("device failed to boot initial fw image\n");
                goto error;
        }
        IPW_DEBUG_INFO("initial device response after %dms\n", rc);

        /* ack fw init done interrupt */
        ipw_write32(priv, IPW_INTA_RW, IPW_INTA_BIT_FW_INITIALIZATION_DONE);

        /* DMA the ucode into the device */
        rc = ipw_load_ucode(priv, ucode_img, le32_to_cpu(fw->ucode_size));
        if (rc < 0) {
                IPW_ERROR("Unable to load ucode: %d\n", rc);
                goto error;
        }

        /* stop nic */
        ipw_stop_nic(priv);

        /* DMA bss firmware into the device */
        rc = ipw_load_firmware(priv, fw_img, le32_to_cpu(fw->fw_size));
        if (rc < 0) {
                IPW_ERROR("Unable to load firmware: %d\n", rc);
                goto error;
        }
#ifdef CONFIG_PM
        fw_loaded = 1;
#endif

        ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 0);

        rc = ipw_queue_reset(priv);
        if (rc < 0) {
                IPW_ERROR("Unable to initialize queues\n");
                goto error;
        }

        /* Ensure interrupts are disabled */
        ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
        /* ack pending interrupts */
        ipw_write32(priv, IPW_INTA_RW, IPW_INTA_MASK_ALL);

        /* kick start the device */
        ipw_start_nic(priv);

        if (ipw_read32(priv, IPW_INTA_RW) & IPW_INTA_BIT_PARITY_ERROR) {
                if (retries > 0) {
                        IPW_WARNING("Parity error.  Retrying init.\n");
                        retries--;
                        goto retry;
                }

                IPW_ERROR("TODO: Handle parity error -- schedule restart?\n");
                rc = -EIO;
                goto error;
        }

        /* wait for the device */
        rc = ipw_poll_bit(priv, IPW_INTA_RW,
                          IPW_INTA_BIT_FW_INITIALIZATION_DONE, 500);
        if (rc < 0) {
                IPW_ERROR("device failed to start within 500ms\n");
                goto error;
        }
        IPW_DEBUG_INFO("device response after %dms\n", rc);

        /* ack fw init done interrupt */
        ipw_write32(priv, IPW_INTA_RW, IPW_INTA_BIT_FW_INITIALIZATION_DONE);

        /* read eeprom data */
        priv->eeprom_delay = 1;
        ipw_read_eeprom(priv);
        /* initialize the eeprom region of sram */
        ipw_eeprom_init_sram(priv);

        /* enable interrupts */
        ipw_enable_interrupts(priv);

        /* Ensure our queue has valid packets */
        ipw_rx_queue_replenish(priv);

        ipw_write32(priv, IPW_RX_READ_INDEX, priv->rxq->read);

        /* ack pending interrupts */
        ipw_write32(priv, IPW_INTA_RW, IPW_INTA_MASK_ALL);

#ifndef CONFIG_PM
        release_firmware(raw);
#endif
        return 0;

      error:
        if (priv->rxq) {
                ipw_rx_queue_free(priv, priv->rxq);
                priv->rxq = NULL;
        }
        ipw_tx_queue_free(priv);
        release_firmware(raw);
#ifdef CONFIG_PM
        fw_loaded = 0;
        raw = NULL;
#endif

        return rc;
}

/**
 * DMA services
 *
 * Theory of operation
 *
 * A queue is a circular buffers with 'Read' and 'Write' pointers.
 * 2 empty entries always kept in the buffer to protect from overflow.
 *
 * For Tx queue, there are low mark and high mark limits. If, after queuing
 * the packet for Tx, free space become < low mark, Tx queue stopped. When
 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 * Tx queue resumed.
 *
 * The IPW operates with six queues, one receive queue in the device's
 * sram, one transmit queue for sending commands to the device firmware,
 * and four transmit queues for data.
 *
 * The four transmit queues allow for performing quality of service (qos)
 * transmissions as per the 802.11 protocol.  Currently Linux does not
 * provide a mechanism to the user for utilizing prioritized queues, so
 * we only utilize the first data transmit queue (queue1).
 */

/**
 * Driver allocates buffers of this size for Rx
 */

/**
 * ipw_rx_queue_space - Return number of free slots available in queue.
 */
static int ipw_rx_queue_space(const struct ipw_rx_queue *q)
{
        int s = q->read - q->write;
        if (s <= 0)
                s += RX_QUEUE_SIZE;
        /* keep some buffer to not confuse full and empty queue */
        s -= 2;
        if (s < 0)
                s = 0;
        return s;
}

static inline int ipw_tx_queue_space(const struct clx2_queue *q)
{
        int s = q->last_used - q->first_empty;
        if (s <= 0)
                s += q->n_bd;
        s -= 2;                 /* keep some reserve to not confuse empty and full situations */
        if (s < 0)
                s = 0;
        return s;
}

static inline int ipw_queue_inc_wrap(int index, int n_bd)
{
        return (++index == n_bd) ? 0 : index;
}

/**
 * Initialize common DMA queue structure
 *
 * @param q                queue to init
 * @param count            Number of BD's to allocate. Should be power of 2
 * @param read_register    Address for 'read' register
 *                         (not offset within BAR, full address)
 * @param write_register   Address for 'write' register
 *                         (not offset within BAR, full address)
 * @param base_register    Address for 'base' register
 *                         (not offset within BAR, full address)
 * @param size             Address for 'size' register
 *                         (not offset within BAR, full address)
 */
static void ipw_queue_init(struct ipw_priv *priv, struct clx2_queue *q,
                           int count, u32 read, u32 write, u32 base, u32 size)
{
        q->n_bd = count;

        q->low_mark = q->n_bd / 4;
        if (q->low_mark < 4)
                q->low_mark = 4;

        q->high_mark = q->n_bd / 8;
        if (q->high_mark < 2)
                q->high_mark = 2;

        q->first_empty = q->last_used = 0;
        q->reg_r = read;
        q->reg_w = write;

        ipw_write32(priv, base, q->dma_addr);
        ipw_write32(priv, size, count);
        ipw_write32(priv, read, 0);
        ipw_write32(priv, write, 0);

        _ipw_read32(priv, 0x90);
}

static int ipw_queue_tx_init(struct ipw_priv *priv,
                             struct clx2_tx_queue *q,
                             int count, u32 read, u32 write, u32 base, u32 size)
{
        struct pci_dev *dev = priv->pci_dev;

        q->txb = kmalloc(sizeof(q->txb[0]) * count, GFP_KERNEL);
        if (!q->txb) {
                IPW_ERROR("vmalloc for auxiliary BD structures failed\n");
                return -ENOMEM;
        }

        q->bd =
            pci_alloc_consistent(dev, sizeof(q->bd[0]) * count, &q->q.dma_addr);
        if (!q->bd) {
                IPW_ERROR("pci_alloc_consistent(%zd) failed\n",
                          sizeof(q->bd[0]) * count);
                kfree(q->txb);
                q->txb = NULL;
                return -ENOMEM;
        }

        ipw_queue_init(priv, &q->q, count, read, write, base, size);
        return 0;
}

/**
 * Free one TFD, those at index [txq->q.last_used].
 * Do NOT advance any indexes
 *
 * @param dev
 * @param txq
 */
static void ipw_queue_tx_free_tfd(struct ipw_priv *priv,
                                  struct clx2_tx_queue *txq)
{
        struct tfd_frame *bd = &txq->bd[txq->q.last_used];
        struct pci_dev *dev = priv->pci_dev;
        int i;

        /* classify bd */
        if (bd->control_flags.message_type == TX_HOST_COMMAND_TYPE)
                /* nothing to cleanup after for host commands */
                return;

        /* sanity check */
        if (le32_to_cpu(bd->u.data.num_chunks) > NUM_TFD_CHUNKS) {
                IPW_ERROR("Too many chunks: %i\n",
                          le32_to_cpu(bd->u.data.num_chunks));
                /** @todo issue fatal error, it is quite serious situation */
                return;
        }

        /* unmap chunks if any */
        for (i = 0; i < le32_to_cpu(bd->u.data.num_chunks); i++) {
                pci_unmap_single(dev, le32_to_cpu(bd->u.data.chunk_ptr[i]),
                                 le16_to_cpu(bd->u.data.chunk_len[i]),
                                 PCI_DMA_TODEVICE);
                if (txq->txb[txq->q.last_used]) {
                        libipw_txb_free(txq->txb[txq->q.last_used]);
                        txq->txb[txq->q.last_used] = NULL;
                }
        }
}

/**
 * Deallocate DMA queue.
 *
 * Empty queue by removing and destroying all BD's.
 * Free all buffers.
 *
 * @param dev
 * @param q
 */
static void ipw_queue_tx_free(struct ipw_priv *priv, struct clx2_tx_queue *txq)
{
        struct clx2_queue *q = &txq->q;
        struct pci_dev *dev = priv->pci_dev;

        if (q->n_bd == 0)
                return;

        /* first, empty all BD's */
        for (; q->first_empty != q->last_used;
             q->last_used = ipw_queue_inc_wrap(q->last_used, q->n_bd)) {
                ipw_queue_tx_free_tfd(priv, txq);
        }

        /* free buffers belonging to queue itself */
        pci_free_consistent(dev, sizeof(txq->bd[0]) * q->n_bd, txq->bd,
                            q->dma_addr);
        kfree(txq->txb);

        /* 0 fill whole structure */
        memset(txq, 0, sizeof(*txq));
}

/**
 * Destroy all DMA queues and structures
 *
 * @param priv
 */
static void ipw_tx_queue_free(struct ipw_priv *priv)
{
        /* Tx CMD queue */
        ipw_queue_tx_free(priv, &priv->txq_cmd);

        /* Tx queues */
        ipw_queue_tx_free(priv, &priv->txq[0]);
        ipw_queue_tx_free(priv, &priv->txq[1]);
        ipw_queue_tx_free(priv, &priv->txq[2]);
        ipw_queue_tx_free(priv, &priv->txq[3]);
}

static void ipw_create_bssid(struct ipw_priv *priv, u8 * bssid)
{
        /* First 3 bytes are manufacturer */
        bssid[0] = priv->mac_addr[0];
        bssid[1] = priv->mac_addr[1];
        bssid[2] = priv->mac_addr[2];

        /* Last bytes are random */
        get_random_bytes(&bssid[3], ETH_ALEN - 3);

        bssid[0] &= 0xfe;       /* clear multicast bit */
        bssid[0] |= 0x02;       /* set local assignment bit (IEEE802) */
}

static u8 ipw_add_station(struct ipw_priv *priv, u8 * bssid)
{
        struct ipw_station_entry entry;
        int i;

        for (i = 0; i < priv->num_stations; i++) {
                if (ether_addr_equal(priv->stations[i], bssid)) {
                        /* Another node is active in network */
                        priv->missed_adhoc_beacons = 0;
                        if (!(priv->config & CFG_STATIC_CHANNEL))
                                /* when other nodes drop out, we drop out */
                                priv->config &= ~CFG_ADHOC_PERSIST;

                        return i;
                }
        }

        if (i == MAX_STATIONS)
                return IPW_INVALID_STATION;

        IPW_DEBUG_SCAN("Adding AdHoc station: %pM\n", bssid);

        entry.reserved = 0;
        entry.support_mode = 0;
        memcpy(entry.mac_addr, bssid, ETH_ALEN);
        memcpy(priv->stations[i], bssid, ETH_ALEN);
        ipw_write_direct(priv, IPW_STATION_TABLE_LOWER + i * sizeof(entry),
                         &entry, sizeof(entry));
        priv->num_stations++;

        return i;
}

static u8 ipw_find_station(struct ipw_priv *priv, u8 * bssid)
{
        int i;

        for (i = 0; i < priv->num_stations; i++)
                if (ether_addr_equal(priv->stations[i], bssid))
                        return i;

        return IPW_INVALID_STATION;
}

static void ipw_send_disassociate(struct ipw_priv *priv, int quiet)
{
        int err;

        if (priv->status & STATUS_ASSOCIATING) {
                IPW_DEBUG_ASSOC("Disassociating while associating.\n");
                schedule_work(&priv->disassociate);
                return;
        }

        if (!(priv->status & STATUS_ASSOCIATED)) {
                IPW_DEBUG_ASSOC("Disassociating while not associated.\n");
                return;
        }

        IPW_DEBUG_ASSOC("Disassociation attempt from %pM "
                        "on channel %d.\n",
                        priv->assoc_request.bssid,
                        priv->assoc_request.channel);

        priv->status &= ~(STATUS_ASSOCIATING | STATUS_ASSOCIATED);
        priv->status |= STATUS_DISASSOCIATING;

        if (quiet)
                priv->assoc_request.assoc_type = HC_DISASSOC_QUIET;
        else
                priv->assoc_request.assoc_type = HC_DISASSOCIATE;

        err = ipw_send_associate(priv, &priv->assoc_request);
        if (err) {
                IPW_DEBUG_HC("Attempt to send [dis]associate command "
                             "failed.\n");
                return;
        }

}

static int ipw_disassociate(void *data)
{
        struct ipw_priv *priv = data;
        if (!(priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)))
                return 0;
        ipw_send_disassociate(data, 0);
        netif_carrier_off(priv->net_dev);
        return 1;
}

static void ipw_bg_disassociate(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, disassociate);
        mutex_lock(&priv->mutex);
        ipw_disassociate(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_system_config(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, system_config);

#ifdef CONFIG_IPW2200_PROMISCUOUS
        if (priv->prom_net_dev && netif_running(priv->prom_net_dev)) {
                priv->sys_config.accept_all_data_frames = 1;
                priv->sys_config.accept_non_directed_frames = 1;
                priv->sys_config.accept_all_mgmt_bcpr = 1;
                priv->sys_config.accept_all_mgmt_frames = 1;
        }
#endif

        ipw_send_system_config(priv);
}

struct ipw_status_code {
        u16 status;
        const char *reason;
};

static const struct ipw_status_code ipw_status_codes[] = {
        {0x00, "Successful"},
        {0x01, "Unspecified failure"},
        {0x0A, "Cannot support all requested capabilities in the "
         "Capability information field"},
        {0x0B, "Reassociation denied due to inability to confirm that "
         "association exists"},
        {0x0C, "Association denied due to reason outside the scope of this "
         "standard"},
        {0x0D,
         "Responding station does not support the specified authentication "
         "algorithm"},
        {0x0E,
         "Received an Authentication frame with authentication sequence "
         "transaction sequence number out of expected sequence"},
        {0x0F, "Authentication rejected because of challenge failure"},
        {0x10, "Authentication rejected due to timeout waiting for next "
         "frame in sequence"},
        {0x11, "Association denied because AP is unable to handle additional "
         "associated stations"},
        {0x12,
         "Association denied due to requesting station not supporting all "
         "of the datarates in the BSSBasicServiceSet Parameter"},
        {0x13,
         "Association denied due to requesting station not supporting "
         "short preamble operation"},
        {0x14,
         "Association denied due to requesting station not supporting "
         "PBCC encoding"},
        {0x15,
         "Association denied due to requesting station not supporting "
         "channel agility"},
        {0x19,
         "Association denied due to requesting station not supporting "
         "short slot operation"},
        {0x1A,
         "Association denied due to requesting station not supporting "
         "DSSS-OFDM operation"},
        {0x28, "Invalid Information Element"},
        {0x29, "Group Cipher is not valid"},
        {0x2A, "Pairwise Cipher is not valid"},
        {0x2B, "AKMP is not valid"},
        {0x2C, "Unsupported RSN IE version"},
        {0x2D, "Invalid RSN IE Capabilities"},
        {0x2E, "Cipher suite is rejected per security policy"},
};

static const char *ipw_get_status_code(u16 status)
{
        int i;
        for (i = 0; i < ARRAY_SIZE(ipw_status_codes); i++)
                if (ipw_status_codes[i].status == (status & 0xff))
                        return ipw_status_codes[i].reason;
        return "Unknown status value.";
}

static inline void average_init(struct average *avg)
{
        memset(avg, 0, sizeof(*avg));
}

#define DEPTH_RSSI 8
#define DEPTH_NOISE 16
static s16 exponential_average(s16 prev_avg, s16 val, u8 depth)
{
        return ((depth-1)*prev_avg +  val)/depth;
}

static void average_add(struct average *avg, s16 val)
{
        avg->sum -= avg->entries[avg->pos];
        avg->sum += val;
        avg->entries[avg->pos++] = val;
        if (unlikely(avg->pos == AVG_ENTRIES)) {
                avg->init = 1;
                avg->pos = 0;
        }
}

static s16 average_value(struct average *avg)
{
        if (!unlikely(avg->init)) {
                if (avg->pos)
                        return avg->sum / avg->pos;
                return 0;
        }

        return avg->sum / AVG_ENTRIES;
}

static void ipw_reset_stats(struct ipw_priv *priv)
{
        u32 len = sizeof(u32);

        priv->quality = 0;

        average_init(&priv->average_missed_beacons);
        priv->exp_avg_rssi = -60;
        priv->exp_avg_noise = -85 + 0x100;

        priv->last_rate = 0;
        priv->last_missed_beacons = 0;
        priv->last_rx_packets = 0;
        priv->last_tx_packets = 0;
        priv->last_tx_failures = 0;

        /* Firmware managed, reset only when NIC is restarted, so we have to
         * normalize on the current value */
        ipw_get_ordinal(priv, IPW_ORD_STAT_RX_ERR_CRC,
                        &priv->last_rx_err, &len);
        ipw_get_ordinal(priv, IPW_ORD_STAT_TX_FAILURE,
                        &priv->last_tx_failures, &len);

        /* Driver managed, reset with each association */
        priv->missed_adhoc_beacons = 0;
        priv->missed_beacons = 0;
        priv->tx_packets = 0;
        priv->rx_packets = 0;

}

static u32 ipw_get_max_rate(struct ipw_priv *priv)
{
        u32 i = 0x80000000;
        u32 mask = priv->rates_mask;
        /* If currently associated in B mode, restrict the maximum
         * rate match to B rates */
        if (priv->assoc_request.ieee_mode == IPW_B_MODE)
                mask &= LIBIPW_CCK_RATES_MASK;

        /* TODO: Verify that the rate is supported by the current rates
         * list. */

        while (i && !(mask & i))
                i >>= 1;
        switch (i) {
        case LIBIPW_CCK_RATE_1MB_MASK:
                return 1000000;
        case LIBIPW_CCK_RATE_2MB_MASK:
                return 2000000;
        case LIBIPW_CCK_RATE_5MB_MASK:
                return 5500000;
        case LIBIPW_OFDM_RATE_6MB_MASK:
                return 6000000;
        case LIBIPW_OFDM_RATE_9MB_MASK:
                return 9000000;
        case LIBIPW_CCK_RATE_11MB_MASK:
                return 11000000;
        case LIBIPW_OFDM_RATE_12MB_MASK:
                return 12000000;
        case LIBIPW_OFDM_RATE_18MB_MASK:
                return 18000000;
        case LIBIPW_OFDM_RATE_24MB_MASK:
                return 24000000;
        case LIBIPW_OFDM_RATE_36MB_MASK:
                return 36000000;
        case LIBIPW_OFDM_RATE_48MB_MASK:
                return 48000000;
        case LIBIPW_OFDM_RATE_54MB_MASK:
                return 54000000;
        }

        if (priv->ieee->mode == IEEE_B)
                return 11000000;
        else
                return 54000000;
}

static u32 ipw_get_current_rate(struct ipw_priv *priv)
{
        u32 rate, len = sizeof(rate);
        int err;

        if (!(priv->status & STATUS_ASSOCIATED))
                return 0;

        if (priv->tx_packets > IPW_REAL_RATE_RX_PACKET_THRESHOLD) {
                err = ipw_get_ordinal(priv, IPW_ORD_STAT_TX_CURR_RATE, &rate,
                                      &len);
                if (err) {
                        IPW_DEBUG_INFO("failed querying ordinals.\n");
                        return 0;
                }
        } else
                return ipw_get_max_rate(priv);

        switch (rate) {
        case IPW_TX_RATE_1MB:
                return 1000000;
        case IPW_TX_RATE_2MB:
                return 2000000;
        case IPW_TX_RATE_5MB:
                return 5500000;
        case IPW_TX_RATE_6MB:
                return 6000000;
        case IPW_TX_RATE_9MB:
                return 9000000;
        case IPW_TX_RATE_11MB:
                return 11000000;
        case IPW_TX_RATE_12MB:
                return 12000000;
        case IPW_TX_RATE_18MB:
                return 18000000;
        case IPW_TX_RATE_24MB:
                return 24000000;
        case IPW_TX_RATE_36MB:
                return 36000000;
        case IPW_TX_RATE_48MB:
                return 48000000;
        case IPW_TX_RATE_54MB:
                return 54000000;
        }

        return 0;
}

#define IPW_STATS_INTERVAL (2 * HZ)
static void ipw_gather_stats(struct ipw_priv *priv)
{
        u32 rx_err, rx_err_delta, rx_packets_delta;
        u32 tx_failures, tx_failures_delta, tx_packets_delta;
        u32 missed_beacons_percent, missed_beacons_delta;
        u32 quality = 0;
        u32 len = sizeof(u32);
        s16 rssi;
        u32 beacon_quality, signal_quality, tx_quality, rx_quality,
            rate_quality;
        u32 max_rate;

        if (!(priv->status & STATUS_ASSOCIATED)) {
                priv->quality = 0;
                return;
        }

        /* Update the statistics */
        ipw_get_ordinal(priv, IPW_ORD_STAT_MISSED_BEACONS,
                        &priv->missed_beacons, &len);
        missed_beacons_delta = priv->missed_beacons - priv->last_missed_beacons;
        priv->last_missed_beacons = priv->missed_beacons;
        if (priv->assoc_request.beacon_interval) {
                missed_beacons_percent = missed_beacons_delta *
                    (HZ * le16_to_cpu(priv->assoc_request.beacon_interval)) /
                    (IPW_STATS_INTERVAL * 10);
        } else {
                missed_beacons_percent = 0;
        }
        average_add(&priv->average_missed_beacons, missed_beacons_percent);

        ipw_get_ordinal(priv, IPW_ORD_STAT_RX_ERR_CRC, &rx_err, &len);
        rx_err_delta = rx_err - priv->last_rx_err;
        priv->last_rx_err = rx_err;

        ipw_get_ordinal(priv, IPW_ORD_STAT_TX_FAILURE, &tx_failures, &len);
        tx_failures_delta = tx_failures - priv->last_tx_failures;
        priv->last_tx_failures = tx_failures;

        rx_packets_delta = priv->rx_packets - priv->last_rx_packets;
        priv->last_rx_packets = priv->rx_packets;

        tx_packets_delta = priv->tx_packets - priv->last_tx_packets;
        priv->last_tx_packets = priv->tx_packets;

        /* Calculate quality based on the following:
         *
         * Missed beacon: 100% = 0, 0% = 70% missed
         * Rate: 60% = 1Mbs, 100% = Max
         * Rx and Tx errors represent a straight % of total Rx/Tx
         * RSSI: 100% = > -50,  0% = < -80
         * Rx errors: 100% = 0, 0% = 50% missed
         *
         * The lowest computed quality is used.
         *
         */
#define BEACON_THRESHOLD 5
        beacon_quality = 100 - missed_beacons_percent;
        if (beacon_quality < BEACON_THRESHOLD)
                beacon_quality = 0;
        else
                beacon_quality = (beacon_quality - BEACON_THRESHOLD) * 100 /
                    (100 - BEACON_THRESHOLD);
        IPW_DEBUG_STATS("Missed beacon: %3d%% (%d%%)\n",
                        beacon_quality, missed_beacons_percent);

        priv->last_rate = ipw_get_current_rate(priv);
        max_rate = ipw_get_max_rate(priv);
        rate_quality = priv->last_rate * 40 / max_rate + 60;
        IPW_DEBUG_STATS("Rate quality : %3d%% (%dMbs)\n",
                        rate_quality, priv->last_rate / 1000000);

        if (rx_packets_delta > 100 && rx_packets_delta + rx_err_delta)
                rx_quality = 100 - (rx_err_delta * 100) /
                    (rx_packets_delta + rx_err_delta);
        else
                rx_quality = 100;
        IPW_DEBUG_STATS("Rx quality   : %3d%% (%u errors, %u packets)\n",
                        rx_quality, rx_err_delta, rx_packets_delta);

        if (tx_packets_delta > 100 && tx_packets_delta + tx_failures_delta)
                tx_quality = 100 - (tx_failures_delta * 100) /
                    (tx_packets_delta + tx_failures_delta);
        else
                tx_quality = 100;
        IPW_DEBUG_STATS("Tx quality   : %3d%% (%u errors, %u packets)\n",
                        tx_quality, tx_failures_delta, tx_packets_delta);

        rssi = priv->exp_avg_rssi;
        signal_quality =
            (100 *
             (priv->ieee->perfect_rssi - priv->ieee->worst_rssi) *
             (priv->ieee->perfect_rssi - priv->ieee->worst_rssi) -
             (priv->ieee->perfect_rssi - rssi) *
             (15 * (priv->ieee->perfect_rssi - priv->ieee->worst_rssi) +
              62 * (priv->ieee->perfect_rssi - rssi))) /
            ((priv->ieee->perfect_rssi - priv->ieee->worst_rssi) *
             (priv->ieee->perfect_rssi - priv->ieee->worst_rssi));
        if (signal_quality > 100)
                signal_quality = 100;
        else if (signal_quality < 1)
                signal_quality = 0;

        IPW_DEBUG_STATS("Signal level : %3d%% (%d dBm)\n",
                        signal_quality, rssi);

        quality = min(rx_quality, signal_quality);
        quality = min(tx_quality, quality);
        quality = min(rate_quality, quality);
        quality = min(beacon_quality, quality);
        if (quality == beacon_quality)
                IPW_DEBUG_STATS("Quality (%d%%): Clamped to missed beacons.\n",
                                quality);
        if (quality == rate_quality)
                IPW_DEBUG_STATS("Quality (%d%%): Clamped to rate quality.\n",
                                quality);
        if (quality == tx_quality)
                IPW_DEBUG_STATS("Quality (%d%%): Clamped to Tx quality.\n",
                                quality);
        if (quality == rx_quality)
                IPW_DEBUG_STATS("Quality (%d%%): Clamped to Rx quality.\n",
                                quality);
        if (quality == signal_quality)
                IPW_DEBUG_STATS("Quality (%d%%): Clamped to signal quality.\n",
                                quality);

        priv->quality = quality;

        schedule_delayed_work(&priv->gather_stats, IPW_STATS_INTERVAL);
}

static void ipw_bg_gather_stats(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, gather_stats.work);
        mutex_lock(&priv->mutex);
        ipw_gather_stats(priv);
        mutex_unlock(&priv->mutex);
}

/* Missed beacon behavior:
 * 1st missed -> roaming_threshold, just wait, don't do any scan/roam.
 * roaming_threshold -> disassociate_threshold, scan and roam for better signal.
 * Above disassociate threshold, give up and stop scanning.
 * Roaming is disabled if disassociate_threshold <= roaming_threshold  */
static void ipw_handle_missed_beacon(struct ipw_priv *priv,
                                            int missed_count)
{
        priv->notif_missed_beacons = missed_count;

        if (missed_count > priv->disassociate_threshold &&
            priv->status & STATUS_ASSOCIATED) {
                /* If associated and we've hit the missed
                 * beacon threshold, disassociate, turn
                 * off roaming, and abort any active scans */
                IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF |
                          IPW_DL_STATE | IPW_DL_ASSOC,
                          "Missed beacon: %d - disassociate\n", missed_count);
                priv->status &= ~STATUS_ROAMING;
                if (priv->status & STATUS_SCANNING) {
                        IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF |
                                  IPW_DL_STATE,
                                  "Aborting scan with missed beacon.\n");
                        schedule_work(&priv->abort_scan);
                }

                schedule_work(&priv->disassociate);
                return;
        }

        if (priv->status & STATUS_ROAMING) {
                /* If we are currently roaming, then just
                 * print a debug statement... */
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
                          "Missed beacon: %d - roam in progress\n",
                          missed_count);
                return;
        }

        if (roaming &&
            (missed_count > priv->roaming_threshold &&
             missed_count <= priv->disassociate_threshold)) {
                /* If we are not already roaming, set the ROAM
                 * bit in the status and kick off a scan.
                 * This can happen several times before we reach
                 * disassociate_threshold. */
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
                          "Missed beacon: %d - initiate "
                          "roaming\n", missed_count);
                if (!(priv->status & STATUS_ROAMING)) {
                        priv->status |= STATUS_ROAMING;
                        if (!(priv->status & STATUS_SCANNING))
                                schedule_delayed_work(&priv->request_scan, 0);
                }
                return;
        }

        if (priv->status & STATUS_SCANNING &&
            missed_count > IPW_MB_SCAN_CANCEL_THRESHOLD) {
                /* Stop scan to keep fw from getting
                 * stuck (only if we aren't roaming --
                 * otherwise we'll never scan more than 2 or 3
                 * channels..) */
                IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF | IPW_DL_STATE,
                          "Aborting scan with missed beacon.\n");
                schedule_work(&priv->abort_scan);
        }

        IPW_DEBUG_NOTIF("Missed beacon: %d\n", missed_count);
}

static void ipw_scan_event(struct work_struct *work)
{
        union iwreq_data wrqu;

        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, scan_event.work);

        wrqu.data.length = 0;
        wrqu.data.flags = 0;
        wireless_send_event(priv->net_dev, SIOCGIWSCAN, &wrqu, NULL);
}

static void handle_scan_event(struct ipw_priv *priv)
{
        /* Only userspace-requested scan completion events go out immediately */
        if (!priv->user_requested_scan) {
                schedule_delayed_work(&priv->scan_event,
                                      round_jiffies_relative(msecs_to_jiffies(4000)));
        } else {
                priv->user_requested_scan = 0;
                mod_delayed_work(system_wq, &priv->scan_event, 0);
        }
}

/**
 * Handle host notification packet.
 * Called from interrupt routine
 */
static void ipw_rx_notification(struct ipw_priv *priv,
                                       struct ipw_rx_notification *notif)
{
        u16 size = le16_to_cpu(notif->size);

        IPW_DEBUG_NOTIF("type = %i (%d bytes)\n", notif->subtype, size);

        switch (notif->subtype) {
        case HOST_NOTIFICATION_STATUS_ASSOCIATED:{
                        struct notif_association *assoc = &notif->u.assoc;

                        switch (assoc->state) {
                        case CMAS_ASSOCIATED:{
                                        IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                                  IPW_DL_ASSOC,
                                                  "associated: '%*pE' %pM\n",
                                                  priv->essid_len, priv->essid,
                                                  priv->bssid);

                                        switch (priv->ieee->iw_mode) {
                                        case IW_MODE_INFRA:
                                                memcpy(priv->ieee->bssid,
                                                       priv->bssid, ETH_ALEN);
                                                break;

                                        case IW_MODE_ADHOC:
                                                memcpy(priv->ieee->bssid,
                                                       priv->bssid, ETH_ALEN);

                                                /* clear out the station table */
                                                priv->num_stations = 0;

                                                IPW_DEBUG_ASSOC
                                                    ("queueing adhoc check\n");
                                                schedule_delayed_work(
                                                        &priv->adhoc_check,
                                                        le16_to_cpu(priv->
                                                        assoc_request.
                                                        beacon_interval));
                                                break;
                                        }

                                        priv->status &= ~STATUS_ASSOCIATING;
                                        priv->status |= STATUS_ASSOCIATED;
                                        schedule_work(&priv->system_config);

#ifdef CONFIG_IPW2200_QOS
#define IPW_GET_PACKET_STYPE(x) WLAN_FC_GET_STYPE( \
                         le16_to_cpu(((struct ieee80211_hdr *)(x))->frame_control))
                                        if ((priv->status & STATUS_AUTH) &&
                                            (IPW_GET_PACKET_STYPE(&notif->u.raw)
                                             == IEEE80211_STYPE_ASSOC_RESP)) {
                                                if ((sizeof
                                                     (struct
                                                      libipw_assoc_response)
                                                     <= size)
                                                    && (size <= 2314)) {
                                                        struct
                                                        libipw_rx_stats
                                                            stats = {
                                                                .len = size - 1,
                                                        };

                                                        IPW_DEBUG_QOS
                                                            ("QoS Associate "
                                                             "size %d\n", size);
                                                        libipw_rx_mgt(priv->
                                                                         ieee,
                                                                         (struct
                                                                          libipw_hdr_4addr
                                                                          *)
                                                                         &notif->u.raw, &stats);
                                                }
                                        }
#endif

                                        schedule_work(&priv->link_up);

                                        break;
                                }

                        case CMAS_AUTHENTICATED:{
                                        if (priv->
                                            status & (STATUS_ASSOCIATED |
                                                      STATUS_AUTH)) {
                                                struct notif_authenticate *auth
                                                    = &notif->u.auth;
                                                IPW_DEBUG(IPW_DL_NOTIF |
                                                          IPW_DL_STATE |
                                                          IPW_DL_ASSOC,
                                                          "deauthenticated: '%*pE' %pM: (0x%04X) - %s\n",
                                                          priv->essid_len,
                                                          priv->essid,
                                                          priv->bssid,
                                                          le16_to_cpu(auth->status),
                                                          ipw_get_status_code
                                                          (le16_to_cpu
                                                           (auth->status)));

                                                priv->status &=
                                                    ~(STATUS_ASSOCIATING |
                                                      STATUS_AUTH |
                                                      STATUS_ASSOCIATED);

                                                schedule_work(&priv->link_down);
                                                break;
                                        }

                                        IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                                  IPW_DL_ASSOC,
                                                  "authenticated: '%*pE' %pM\n",
                                                  priv->essid_len, priv->essid,
                                                  priv->bssid);
                                        break;
                                }

                        case CMAS_INIT:{
                                        if (priv->status & STATUS_AUTH) {
                                                struct
                                                    libipw_assoc_response
                                                *resp;
                                                resp =
                                                    (struct
                                                     libipw_assoc_response
                                                     *)&notif->u.raw;
                                                IPW_DEBUG(IPW_DL_NOTIF |
                                                          IPW_DL_STATE |
                                                          IPW_DL_ASSOC,
                                                          "association failed (0x%04X): %s\n",
                                                          le16_to_cpu(resp->status),
                                                          ipw_get_status_code
                                                          (le16_to_cpu
                                                           (resp->status)));
                                        }

                                        IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                                  IPW_DL_ASSOC,
                                                  "disassociated: '%*pE' %pM\n",
                                                  priv->essid_len, priv->essid,
                                                  priv->bssid);

                                        priv->status &=
                                            ~(STATUS_DISASSOCIATING |
                                              STATUS_ASSOCIATING |
                                              STATUS_ASSOCIATED | STATUS_AUTH);
                                        if (priv->assoc_network
                                            && (priv->assoc_network->
                                                capability &
                                                WLAN_CAPABILITY_IBSS))
                                                ipw_remove_current_network
                                                    (priv);

                                        schedule_work(&priv->link_down);

                                        break;
                                }

                        case CMAS_RX_ASSOC_RESP:
                                break;

                        default:
                                IPW_ERROR("assoc: unknown (%d)\n",
                                          assoc->state);
                                break;
                        }

                        break;
                }

        case HOST_NOTIFICATION_STATUS_AUTHENTICATE:{
                        struct notif_authenticate *auth = &notif->u.auth;
                        switch (auth->state) {
                        case CMAS_AUTHENTICATED:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
                                          "authenticated: '%*pE' %pM\n",
                                          priv->essid_len, priv->essid,
                                          priv->bssid);
                                priv->status |= STATUS_AUTH;
                                break;

                        case CMAS_INIT:
                                if (priv->status & STATUS_AUTH) {
                                        IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                                  IPW_DL_ASSOC,
                                                  "authentication failed (0x%04X): %s\n",
                                                  le16_to_cpu(auth->status),
                                                  ipw_get_status_code(le16_to_cpu
                                                                      (auth->
                                                                       status)));
                                }
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC,
                                          "deauthenticated: '%*pE' %pM\n",
                                          priv->essid_len, priv->essid,
                                          priv->bssid);

                                priv->status &= ~(STATUS_ASSOCIATING |
                                                  STATUS_AUTH |
                                                  STATUS_ASSOCIATED);

                                schedule_work(&priv->link_down);
                                break;

                        case CMAS_TX_AUTH_SEQ_1:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUTH_SEQ_1\n");
                                break;
                        case CMAS_RX_AUTH_SEQ_2:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUTH_SEQ_2\n");
                                break;
                        case CMAS_AUTH_SEQ_1_PASS:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUTH_SEQ_1_PASS\n");
                                break;
                        case CMAS_AUTH_SEQ_1_FAIL:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUTH_SEQ_1_FAIL\n");
                                break;
                        case CMAS_TX_AUTH_SEQ_3:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUTH_SEQ_3\n");
                                break;
                        case CMAS_RX_AUTH_SEQ_4:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "RX_AUTH_SEQ_4\n");
                                break;
                        case CMAS_AUTH_SEQ_2_PASS:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUTH_SEQ_2_PASS\n");
                                break;
                        case CMAS_AUTH_SEQ_2_FAIL:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "AUT_SEQ_2_FAIL\n");
                                break;
                        case CMAS_TX_ASSOC:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "TX_ASSOC\n");
                                break;
                        case CMAS_RX_ASSOC_RESP:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "RX_ASSOC_RESP\n");

                                break;
                        case CMAS_ASSOCIATED:
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                                          IPW_DL_ASSOC, "ASSOCIATED\n");
                                break;
                        default:
                                IPW_DEBUG_NOTIF("auth: failure - %d\n",
                                                auth->state);
                                break;
                        }
                        break;
                }

        case HOST_NOTIFICATION_STATUS_SCAN_CHANNEL_RESULT:{
                        struct notif_channel_result *x =
                            &notif->u.channel_result;

                        if (size == sizeof(*x)) {
                                IPW_DEBUG_SCAN("Scan result for channel %d\n",
                                               x->channel_num);
                        } else {
                                IPW_DEBUG_SCAN("Scan result of wrong size %d "
                                               "(should be %zd)\n",
                                               size, sizeof(*x));
                        }
                        break;
                }

        case HOST_NOTIFICATION_STATUS_SCAN_COMPLETED:{
                        struct notif_scan_complete *x = &notif->u.scan_complete;
                        if (size == sizeof(*x)) {
                                IPW_DEBUG_SCAN
                                    ("Scan completed: type %d, %d channels, "
                                     "%d status\n", x->scan_type,
                                     x->num_channels, x->status);
                        } else {
                                IPW_ERROR("Scan completed of wrong size %d "
                                          "(should be %zd)\n",
                                          size, sizeof(*x));
                        }

                        priv->status &=
                            ~(STATUS_SCANNING | STATUS_SCAN_ABORTING);

                        wake_up_interruptible(&priv->wait_state);
                        cancel_delayed_work(&priv->scan_check);

                        if (priv->status & STATUS_EXIT_PENDING)
                                break;

                        priv->ieee->scans++;

#ifdef CONFIG_IPW2200_MONITOR
                        if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
                                priv->status |= STATUS_SCAN_FORCED;
                                schedule_delayed_work(&priv->request_scan, 0);
                                break;
                        }
                        priv->status &= ~STATUS_SCAN_FORCED;
#endif                          /* CONFIG_IPW2200_MONITOR */

                        /* Do queued direct scans first */
                        if (priv->status & STATUS_DIRECT_SCAN_PENDING)
                                schedule_delayed_work(&priv->request_direct_scan, 0);

                        if (!(priv->status & (STATUS_ASSOCIATED |
                                              STATUS_ASSOCIATING |
                                              STATUS_ROAMING |
                                              STATUS_DISASSOCIATING)))
                                schedule_work(&priv->associate);
                        else if (priv->status & STATUS_ROAMING) {
                                if (x->status == SCAN_COMPLETED_STATUS_COMPLETE)
                                        /* If a scan completed and we are in roam mode, then
                                         * the scan that completed was the one requested as a
                                         * result of entering roam... so, schedule the
                                         * roam work */
                                        schedule_work(&priv->roam);
                                else
                                        /* Don't schedule if we aborted the scan */
                                        priv->status &= ~STATUS_ROAMING;
                        } else if (priv->status & STATUS_SCAN_PENDING)
                                schedule_delayed_work(&priv->request_scan, 0);
                        else if (priv->config & CFG_BACKGROUND_SCAN
                                 && priv->status & STATUS_ASSOCIATED)
                                schedule_delayed_work(&priv->request_scan,
                                                      round_jiffies_relative(HZ));

                        /* Send an empty event to user space.
                         * We don't send the received data on the event because
                         * it would require us to do complex transcoding, and
                         * we want to minimise the work done in the irq handler
                         * Use a request to extract the data.
                         * Also, we generate this even for any scan, regardless
                         * on how the scan was initiated. User space can just
                         * sync on periodic scan to get fresh data...
                         * Jean II */
                        if (x->status == SCAN_COMPLETED_STATUS_COMPLETE)
                                handle_scan_event(priv);
                        break;
                }

        case HOST_NOTIFICATION_STATUS_FRAG_LENGTH:{
                        struct notif_frag_length *x = &notif->u.frag_len;

                        if (size == sizeof(*x))
                                IPW_ERROR("Frag length: %d\n",
                                          le16_to_cpu(x->frag_length));
                        else
                                IPW_ERROR("Frag length of wrong size %d "
                                          "(should be %zd)\n",
                                          size, sizeof(*x));
                        break;
                }

        case HOST_NOTIFICATION_STATUS_LINK_DETERIORATION:{
                        struct notif_link_deterioration *x =
                            &notif->u.link_deterioration;

                        if (size == sizeof(*x)) {
                                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
                                        "link deterioration: type %d, cnt %d\n",
                                        x->silence_notification_type,
                                        x->silence_count);
                                memcpy(&priv->last_link_deterioration, x,
                                       sizeof(*x));
                        } else {
                                IPW_ERROR("Link Deterioration of wrong size %d "
                                          "(should be %zd)\n",
                                          size, sizeof(*x));
                        }
                        break;
                }

        case HOST_NOTIFICATION_DINO_CONFIG_RESPONSE:{
                        IPW_ERROR("Dino config\n");
                        if (priv->hcmd
                            && priv->hcmd->cmd != HOST_CMD_DINO_CONFIG)
                                IPW_ERROR("Unexpected DINO_CONFIG_RESPONSE\n");

                        break;
                }

        case HOST_NOTIFICATION_STATUS_BEACON_STATE:{
                        struct notif_beacon_state *x = &notif->u.beacon_state;
                        if (size != sizeof(*x)) {
                                IPW_ERROR
                                    ("Beacon state of wrong size %d (should "
                                     "be %zd)\n", size, sizeof(*x));
                                break;
                        }

                        if (le32_to_cpu(x->state) ==
                            HOST_NOTIFICATION_STATUS_BEACON_MISSING)
                                ipw_handle_missed_beacon(priv,
                                                         le32_to_cpu(x->
                                                                     number));

                        break;
                }

        case HOST_NOTIFICATION_STATUS_TGI_TX_KEY:{
                        struct notif_tgi_tx_key *x = &notif->u.tgi_tx_key;
                        if (size == sizeof(*x)) {
                                IPW_ERROR("TGi Tx Key: state 0x%02x sec type "
                                          "0x%02x station %d\n",
                                          x->key_state, x->security_type,
                                          x->station_index);
                                break;
                        }

                        IPW_ERROR
                            ("TGi Tx Key of wrong size %d (should be %zd)\n",
                             size, sizeof(*x));
                        break;
                }

        case HOST_NOTIFICATION_CALIB_KEEP_RESULTS:{
                        struct notif_calibration *x = &notif->u.calibration;

                        if (size == sizeof(*x)) {
                                memcpy(&priv->calib, x, sizeof(*x));
                                IPW_DEBUG_INFO("TODO: Calibration\n");
                                break;
                        }

                        IPW_ERROR
                            ("Calibration of wrong size %d (should be %zd)\n",
                             size, sizeof(*x));
                        break;
                }

        case HOST_NOTIFICATION_NOISE_STATS:{
                        if (size == sizeof(u32)) {
                                priv->exp_avg_noise =
                                    exponential_average(priv->exp_avg_noise,
                                    (u8) (le32_to_cpu(notif->u.noise.value) & 0xff),
                                    DEPTH_NOISE);
                                break;
                        }

                        IPW_ERROR
                            ("Noise stat is wrong size %d (should be %zd)\n",
                             size, sizeof(u32));
                        break;
                }

        default:
                IPW_DEBUG_NOTIF("Unknown notification: "
                                "subtype=%d,flags=0x%2x,size=%d\n",
                                notif->subtype, notif->flags, size);
        }
}

/**
 * Destroys all DMA structures and initialise them again
 *
 * @param priv
 * @return error code
 */
static int ipw_queue_reset(struct ipw_priv *priv)
{
        int rc = 0;
        /** @todo customize queue sizes */
        int nTx = 64, nTxCmd = 8;
        ipw_tx_queue_free(priv);
        /* Tx CMD queue */
        rc = ipw_queue_tx_init(priv, &priv->txq_cmd, nTxCmd,
                               IPW_TX_CMD_QUEUE_READ_INDEX,
                               IPW_TX_CMD_QUEUE_WRITE_INDEX,
                               IPW_TX_CMD_QUEUE_BD_BASE,
                               IPW_TX_CMD_QUEUE_BD_SIZE);
        if (rc) {
                IPW_ERROR("Tx Cmd queue init failed\n");
                goto error;
        }
        /* Tx queue(s) */
        rc = ipw_queue_tx_init(priv, &priv->txq[0], nTx,
                               IPW_TX_QUEUE_0_READ_INDEX,
                               IPW_TX_QUEUE_0_WRITE_INDEX,
                               IPW_TX_QUEUE_0_BD_BASE, IPW_TX_QUEUE_0_BD_SIZE);
        if (rc) {
                IPW_ERROR("Tx 0 queue init failed\n");
                goto error;
        }
        rc = ipw_queue_tx_init(priv, &priv->txq[1], nTx,
                               IPW_TX_QUEUE_1_READ_INDEX,
                               IPW_TX_QUEUE_1_WRITE_INDEX,
                               IPW_TX_QUEUE_1_BD_BASE, IPW_TX_QUEUE_1_BD_SIZE);
        if (rc) {
                IPW_ERROR("Tx 1 queue init failed\n");
                goto error;
        }
        rc = ipw_queue_tx_init(priv, &priv->txq[2], nTx,
                               IPW_TX_QUEUE_2_READ_INDEX,
                               IPW_TX_QUEUE_2_WRITE_INDEX,
                               IPW_TX_QUEUE_2_BD_BASE, IPW_TX_QUEUE_2_BD_SIZE);
        if (rc) {
                IPW_ERROR("Tx 2 queue init failed\n");
                goto error;
        }
        rc = ipw_queue_tx_init(priv, &priv->txq[3], nTx,
                               IPW_TX_QUEUE_3_READ_INDEX,
                               IPW_TX_QUEUE_3_WRITE_INDEX,
                               IPW_TX_QUEUE_3_BD_BASE, IPW_TX_QUEUE_3_BD_SIZE);
        if (rc) {
                IPW_ERROR("Tx 3 queue init failed\n");
                goto error;
        }
        /* statistics */
        priv->rx_bufs_min = 0;
        priv->rx_pend_max = 0;
        return rc;

      error:
        ipw_tx_queue_free(priv);
        return rc;
}

/**
 * Reclaim Tx queue entries no more used by NIC.
 *
 * When FW advances 'R' index, all entries between old and
 * new 'R' index need to be reclaimed. As result, some free space
 * forms. If there is enough free space (> low mark), wake Tx queue.
 *
 * @note Need to protect against garbage in 'R' index
 * @param priv
 * @param txq
 * @param qindex
 * @return Number of used entries remains in the queue
 */
static int ipw_queue_tx_reclaim(struct ipw_priv *priv,
                                struct clx2_tx_queue *txq, int qindex)
{
        u32 hw_tail;
        int used;
        struct clx2_queue *q = &txq->q;

        hw_tail = ipw_read32(priv, q->reg_r);
        if (hw_tail >= q->n_bd) {
                IPW_ERROR
                    ("Read index for DMA queue (%d) is out of range [0-%d)\n",
                     hw_tail, q->n_bd);
                goto done;
        }
        for (; q->last_used != hw_tail;
             q->last_used = ipw_queue_inc_wrap(q->last_used, q->n_bd)) {
                ipw_queue_tx_free_tfd(priv, txq);
                priv->tx_packets++;
        }
      done:
        if ((ipw_tx_queue_space(q) > q->low_mark) &&
            (qindex >= 0))
                netif_wake_queue(priv->net_dev);
        used = q->first_empty - q->last_used;
        if (used < 0)
                used += q->n_bd;

        return used;
}

static int ipw_queue_tx_hcmd(struct ipw_priv *priv, int hcmd, void *buf,
                             int len, int sync)
{
        struct clx2_tx_queue *txq = &priv->txq_cmd;
        struct clx2_queue *q = &txq->q;
        struct tfd_frame *tfd;

        if (ipw_tx_queue_space(q) < (sync ? 1 : 2)) {
                IPW_ERROR("No space for Tx\n");
                return -EBUSY;
        }

        tfd = &txq->bd[q->first_empty];
        txq->txb[q->first_empty] = NULL;

        memset(tfd, 0, sizeof(*tfd));
        tfd->control_flags.message_type = TX_HOST_COMMAND_TYPE;
        tfd->control_flags.control_bits = TFD_NEED_IRQ_MASK;
        priv->hcmd_seq++;
        tfd->u.cmd.index = hcmd;
        tfd->u.cmd.length = len;
        memcpy(tfd->u.cmd.payload, buf, len);
        q->first_empty = ipw_queue_inc_wrap(q->first_empty, q->n_bd);
        ipw_write32(priv, q->reg_w, q->first_empty);
        _ipw_read32(priv, 0x90);

        return 0;
}

/*
 * Rx theory of operation
 *
 * The host allocates 32 DMA target addresses and passes the host address
 * to the firmware at register IPW_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 * 0 to 31
 *
 * Rx Queue Indexes
 * The host/firmware share two index registers for managing the Rx buffers.
 *
 * The READ index maps to the first position that the firmware may be writing
 * to -- the driver can read up to (but not including) this position and get
 * good data.
 * The READ index is managed by the firmware once the card is enabled.
 *
 * The WRITE index maps to the last position the driver has read from -- the
 * position preceding WRITE is the last slot the firmware can place a packet.
 *
 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 * WRITE = READ.
 *
 * During initialization the host sets up the READ queue position to the first
 * INDEX position, and WRITE to the last (READ - 1 wrapped)
 *
 * When the firmware places a packet in a buffer it will advance the READ index
 * and fire the RX interrupt.  The driver can then query the READ index and
 * process as many packets as possible, moving the WRITE index forward as it
 * resets the Rx queue buffers with new memory.
 *
 * The management in the driver is as follows:
 * + A list of pre-allocated SKBs is stored in ipw->rxq->rx_free.  When
 *   ipw->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 *   to replensish the ipw->rxq->rx_free.
 * + In ipw_rx_queue_replenish (scheduled) if 'processed' != 'read' then the
 *   ipw->rxq is replenished and the READ INDEX is updated (updating the
 *   'processed' and 'read' driver indexes as well)
 * + A received packet is processed and handed to the kernel network stack,
 *   detached from the ipw->rxq.  The driver 'processed' index is updated.
 * + The Host/Firmware ipw->rxq is replenished at tasklet time from the rx_free
 *   list. If there are no allocated buffers in ipw->rxq->rx_free, the READ
 *   INDEX is not incremented and ipw->status(RX_STALLED) is set.  If there
 *   were enough free buffers and RX_STALLED is set it is cleared.
 *
 *
 * Driver sequence:
 *
 * ipw_rx_queue_alloc()       Allocates rx_free
 * ipw_rx_queue_replenish()   Replenishes rx_free list from rx_used, and calls
 *                            ipw_rx_queue_restock
 * ipw_rx_queue_restock()     Moves available buffers from rx_free into Rx
 *                            queue, updates firmware pointers, and updates
 *                            the WRITE index.  If insufficient rx_free buffers
 *                            are available, schedules ipw_rx_queue_replenish
 *
 * -- enable interrupts --
 * ISR - ipw_rx()             Detach ipw_rx_mem_buffers from pool up to the
 *                            READ INDEX, detaching the SKB from the pool.
 *                            Moves the packet buffer from queue to rx_used.
 *                            Calls ipw_rx_queue_restock to refill any empty
 *                            slots.
 * ...
 *
 */

/*
 * If there are slots in the RX queue that  need to be restocked,
 * and we have free pre-allocated buffers, fill the ranks as much
 * as we can pulling from rx_free.
 *
 * This moves the 'write' index forward to catch up with 'processed', and
 * also updates the memory address in the firmware to reference the new
 * target buffer.
 */
static void ipw_rx_queue_restock(struct ipw_priv *priv)
{
        struct ipw_rx_queue *rxq = priv->rxq;
        struct list_head *element;
        struct ipw_rx_mem_buffer *rxb;
        unsigned long flags;
        int write;

        spin_lock_irqsave(&rxq->lock, flags);
        write = rxq->write;
        while ((ipw_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
                element = rxq->rx_free.next;
                rxb = list_entry(element, struct ipw_rx_mem_buffer, list);
                list_del(element);

                ipw_write32(priv, IPW_RFDS_TABLE_LOWER + rxq->write * RFD_SIZE,
                            rxb->dma_addr);
                rxq->queue[rxq->write] = rxb;
                rxq->write = (rxq->write + 1) % RX_QUEUE_SIZE;
                rxq->free_count--;
        }
        spin_unlock_irqrestore(&rxq->lock, flags);

        /* If the pre-allocated buffer pool is dropping low, schedule to
         * refill it */
        if (rxq->free_count <= RX_LOW_WATERMARK)
                schedule_work(&priv->rx_replenish);

        /* If we've added more space for the firmware to place data, tell it */
        if (write != rxq->write)
                ipw_write32(priv, IPW_RX_WRITE_INDEX, rxq->write);
}

/*
 * Move all used packet from rx_used to rx_free, allocating a new SKB for each.
 * Also restock the Rx queue via ipw_rx_queue_restock.
 *
 * This is called as a scheduled work item (except for during initialization)
 */
static void ipw_rx_queue_replenish(void *data)
{
        struct ipw_priv *priv = data;
        struct ipw_rx_queue *rxq = priv->rxq;
        struct list_head *element;
        struct ipw_rx_mem_buffer *rxb;
        unsigned long flags;

        spin_lock_irqsave(&rxq->lock, flags);
        while (!list_empty(&rxq->rx_used)) {
                element = rxq->rx_used.next;
                rxb = list_entry(element, struct ipw_rx_mem_buffer, list);
                rxb->skb = alloc_skb(IPW_RX_BUF_SIZE, GFP_ATOMIC);
                if (!rxb->skb) {
                        printk(KERN_CRIT "%s: Can not allocate SKB buffers.\n",
                               priv->net_dev->name);
                        /* We don't reschedule replenish work here -- we will
                         * call the restock method and if it still needs
                         * more buffers it will schedule replenish */
                        break;
                }
                list_del(element);

                rxb->dma_addr =
                    pci_map_single(priv->pci_dev, rxb->skb->data,
                                   IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);

                list_add_tail(&rxb->list, &rxq->rx_free);
                rxq->free_count++;
        }
        spin_unlock_irqrestore(&rxq->lock, flags);

        ipw_rx_queue_restock(priv);
}

static void ipw_bg_rx_queue_replenish(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, rx_replenish);
        mutex_lock(&priv->mutex);
        ipw_rx_queue_replenish(priv);
        mutex_unlock(&priv->mutex);
}

/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
 * This free routine walks the list of POOL entries and if SKB is set to
 * non NULL it is unmapped and freed
 */
static void ipw_rx_queue_free(struct ipw_priv *priv, struct ipw_rx_queue *rxq)
{
        int i;

        if (!rxq)
                return;

        for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
                if (rxq->pool[i].skb != NULL) {
                        pci_unmap_single(priv->pci_dev, rxq->pool[i].dma_addr,
                                         IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
                        dev_kfree_skb(rxq->pool[i].skb);
                }
        }

        kfree(rxq);
}

static struct ipw_rx_queue *ipw_rx_queue_alloc(struct ipw_priv *priv)
{
        struct ipw_rx_queue *rxq;
        int i;

        rxq = kzalloc(sizeof(*rxq), GFP_KERNEL);
        if (unlikely(!rxq)) {
                IPW_ERROR("memory allocation failed\n");
                return NULL;
        }
        spin_lock_init(&rxq->lock);
        INIT_LIST_HEAD(&rxq->rx_free);
        INIT_LIST_HEAD(&rxq->rx_used);

        /* Fill the rx_used queue with _all_ of the Rx buffers */
        for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
                list_add_tail(&rxq->pool[i].list, &rxq->rx_used);

        /* Set us so that we have processed and used all buffers, but have
         * not restocked the Rx queue with fresh buffers */
        rxq->read = rxq->write = 0;
        rxq->free_count = 0;

        return rxq;
}

static int ipw_is_rate_in_mask(struct ipw_priv *priv, int ieee_mode, u8 rate)
{
        rate &= ~LIBIPW_BASIC_RATE_MASK;
        if (ieee_mode == IEEE_A) {
                switch (rate) {
                case LIBIPW_OFDM_RATE_6MB:
                        return priv->rates_mask & LIBIPW_OFDM_RATE_6MB_MASK ?
                            1 : 0;
                case LIBIPW_OFDM_RATE_9MB:
                        return priv->rates_mask & LIBIPW_OFDM_RATE_9MB_MASK ?
                            1 : 0;
                case LIBIPW_OFDM_RATE_12MB:
                        return priv->
                            rates_mask & LIBIPW_OFDM_RATE_12MB_MASK ? 1 : 0;
                case LIBIPW_OFDM_RATE_18MB:
                        return priv->
                            rates_mask & LIBIPW_OFDM_RATE_18MB_MASK ? 1 : 0;
                case LIBIPW_OFDM_RATE_24MB:
                        return priv->
                            rates_mask & LIBIPW_OFDM_RATE_24MB_MASK ? 1 : 0;
                case LIBIPW_OFDM_RATE_36MB:
                        return priv->
                            rates_mask & LIBIPW_OFDM_RATE_36MB_MASK ? 1 : 0;
                case LIBIPW_OFDM_RATE_48MB:
                        return priv->
                            rates_mask & LIBIPW_OFDM_RATE_48MB_MASK ? 1 : 0;
                case LIBIPW_OFDM_RATE_54MB:
                        return priv->
                            rates_mask & LIBIPW_OFDM_RATE_54MB_MASK ? 1 : 0;
                default:
                        return 0;
                }
        }

        /* B and G mixed */
        switch (rate) {
        case LIBIPW_CCK_RATE_1MB:
                return priv->rates_mask & LIBIPW_CCK_RATE_1MB_MASK ? 1 : 0;
        case LIBIPW_CCK_RATE_2MB:
                return priv->rates_mask & LIBIPW_CCK_RATE_2MB_MASK ? 1 : 0;
        case LIBIPW_CCK_RATE_5MB:
                return priv->rates_mask & LIBIPW_CCK_RATE_5MB_MASK ? 1 : 0;
        case LIBIPW_CCK_RATE_11MB:
                return priv->rates_mask & LIBIPW_CCK_RATE_11MB_MASK ? 1 : 0;
        }

        /* If we are limited to B modulations, bail at this point */
        if (ieee_mode == IEEE_B)
                return 0;

        /* G */
        switch (rate) {
        case LIBIPW_OFDM_RATE_6MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_6MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_9MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_9MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_12MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_12MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_18MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_18MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_24MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_24MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_36MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_36MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_48MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_48MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_54MB:
                return priv->rates_mask & LIBIPW_OFDM_RATE_54MB_MASK ? 1 : 0;
        }

        return 0;
}

static int ipw_compatible_rates(struct ipw_priv *priv,
                                const struct libipw_network *network,
                                struct ipw_supported_rates *rates)
{
        int num_rates, i;

        memset(rates, 0, sizeof(*rates));
        num_rates = min(network->rates_len, (u8) IPW_MAX_RATES);
        rates->num_rates = 0;
        for (i = 0; i < num_rates; i++) {
                if (!ipw_is_rate_in_mask(priv, network->mode,
                                         network->rates[i])) {

                        if (network->rates[i] & LIBIPW_BASIC_RATE_MASK) {
                                IPW_DEBUG_SCAN("Adding masked mandatory "
                                               "rate %02X\n",
                                               network->rates[i]);
                                rates->supported_rates[rates->num_rates++] =
                                    network->rates[i];
                                continue;
                        }

                        IPW_DEBUG_SCAN("Rate %02X masked : 0x%08X\n",
                                       network->rates[i], priv->rates_mask);
                        continue;
                }

                rates->supported_rates[rates->num_rates++] = network->rates[i];
        }

        num_rates = min(network->rates_ex_len,
                        (u8) (IPW_MAX_RATES - num_rates));
        for (i = 0; i < num_rates; i++) {
                if (!ipw_is_rate_in_mask(priv, network->mode,
                                         network->rates_ex[i])) {
                        if (network->rates_ex[i] & LIBIPW_BASIC_RATE_MASK) {
                                IPW_DEBUG_SCAN("Adding masked mandatory "
                                               "rate %02X\n",
                                               network->rates_ex[i]);
                                rates->supported_rates[rates->num_rates++] =
                                    network->rates[i];
                                continue;
                        }

                        IPW_DEBUG_SCAN("Rate %02X masked : 0x%08X\n",
                                       network->rates_ex[i], priv->rates_mask);
                        continue;
                }

                rates->supported_rates[rates->num_rates++] =
                    network->rates_ex[i];
        }

        return 1;
}

static void ipw_copy_rates(struct ipw_supported_rates *dest,
                                  const struct ipw_supported_rates *src)
{
        u8 i;
        for (i = 0; i < src->num_rates; i++)
                dest->supported_rates[i] = src->supported_rates[i];
        dest->num_rates = src->num_rates;
}

/* TODO: Look at sniffed packets in the air to determine if the basic rate
 * mask should ever be used -- right now all callers to add the scan rates are
 * set with the modulation = CCK, so BASIC_RATE_MASK is never set... */
static void ipw_add_cck_scan_rates(struct ipw_supported_rates *rates,
                                   u8 modulation, u32 rate_mask)
{
        u8 basic_mask = (LIBIPW_OFDM_MODULATION == modulation) ?
            LIBIPW_BASIC_RATE_MASK : 0;

        if (rate_mask & LIBIPW_CCK_RATE_1MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_BASIC_RATE_MASK | LIBIPW_CCK_RATE_1MB;

        if (rate_mask & LIBIPW_CCK_RATE_2MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_BASIC_RATE_MASK | LIBIPW_CCK_RATE_2MB;

        if (rate_mask & LIBIPW_CCK_RATE_5MB_MASK)
                rates->supported_rates[rates->num_rates++] = basic_mask |
                    LIBIPW_CCK_RATE_5MB;

        if (rate_mask & LIBIPW_CCK_RATE_11MB_MASK)
                rates->supported_rates[rates->num_rates++] = basic_mask |
                    LIBIPW_CCK_RATE_11MB;
}

static void ipw_add_ofdm_scan_rates(struct ipw_supported_rates *rates,
                                    u8 modulation, u32 rate_mask)
{
        u8 basic_mask = (LIBIPW_OFDM_MODULATION == modulation) ?
            LIBIPW_BASIC_RATE_MASK : 0;

        if (rate_mask & LIBIPW_OFDM_RATE_6MB_MASK)
                rates->supported_rates[rates->num_rates++] = basic_mask |
                    LIBIPW_OFDM_RATE_6MB;

        if (rate_mask & LIBIPW_OFDM_RATE_9MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_OFDM_RATE_9MB;

        if (rate_mask & LIBIPW_OFDM_RATE_12MB_MASK)
                rates->supported_rates[rates->num_rates++] = basic_mask |
                    LIBIPW_OFDM_RATE_12MB;

        if (rate_mask & LIBIPW_OFDM_RATE_18MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_OFDM_RATE_18MB;

        if (rate_mask & LIBIPW_OFDM_RATE_24MB_MASK)
                rates->supported_rates[rates->num_rates++] = basic_mask |
                    LIBIPW_OFDM_RATE_24MB;

        if (rate_mask & LIBIPW_OFDM_RATE_36MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_OFDM_RATE_36MB;

        if (rate_mask & LIBIPW_OFDM_RATE_48MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_OFDM_RATE_48MB;

        if (rate_mask & LIBIPW_OFDM_RATE_54MB_MASK)
                rates->supported_rates[rates->num_rates++] =
                    LIBIPW_OFDM_RATE_54MB;
}

struct ipw_network_match {
        struct libipw_network *network;
        struct ipw_supported_rates rates;
};

static int ipw_find_adhoc_network(struct ipw_priv *priv,
                                  struct ipw_network_match *match,
                                  struct libipw_network *network,
                                  int roaming)
{
        struct ipw_supported_rates rates;

        /* Verify that this network's capability is compatible with the
         * current mode (AdHoc or Infrastructure) */
        if ((priv->ieee->iw_mode == IW_MODE_ADHOC &&
             !(network->capability & WLAN_CAPABILITY_IBSS))) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded due to capability mismatch.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        if (unlikely(roaming)) {
                /* If we are roaming, then ensure check if this is a valid
                 * network to try and roam to */
                if ((network->ssid_len != match->network->ssid_len) ||
                    memcmp(network->ssid, match->network->ssid,
                           network->ssid_len)) {
                        IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of non-network ESSID.\n",
                                        network->ssid_len, network->ssid,
                                        network->bssid);
                        return 0;
                }
        } else {
                /* If an ESSID has been configured then compare the broadcast
                 * ESSID to ours */
                if ((priv->config & CFG_STATIC_ESSID) &&
                    ((network->ssid_len != priv->essid_len) ||
                     memcmp(network->ssid, priv->essid,
                            min(network->ssid_len, priv->essid_len)))) {
                        IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of ESSID mismatch: '%*pE'.\n",
                                        network->ssid_len, network->ssid,
                                        network->bssid, priv->essid_len,
                                        priv->essid);
                        return 0;
                }
        }

        /* If the old network rate is better than this one, don't bother
         * testing everything else. */

        if (network->time_stamp[0] < match->network->time_stamp[0]) {
                IPW_DEBUG_MERGE("Network '%*pE excluded because newer than current network.\n",
                                match->network->ssid_len, match->network->ssid);
                return 0;
        } else if (network->time_stamp[1] < match->network->time_stamp[1]) {
                IPW_DEBUG_MERGE("Network '%*pE excluded because newer than current network.\n",
                                match->network->ssid_len, match->network->ssid);
                return 0;
        }

        /* Now go through and see if the requested network is valid... */
        if (priv->ieee->scan_age != 0 &&
            time_after(jiffies, network->last_scanned + priv->ieee->scan_age)) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of age: %ums.\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                jiffies_to_msecs(jiffies -
                                                 network->last_scanned));
                return 0;
        }

        if ((priv->config & CFG_STATIC_CHANNEL) &&
            (network->channel != priv->channel)) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of channel mismatch: %d != %d.\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                network->channel, priv->channel);
                return 0;
        }

        /* Verify privacy compatibility */
        if (((priv->capability & CAP_PRIVACY_ON) ? 1 : 0) !=
            ((network->capability & WLAN_CAPABILITY_PRIVACY) ? 1 : 0)) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of privacy mismatch: %s != %s.\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                priv->
                                capability & CAP_PRIVACY_ON ? "on" : "off",
                                network->
                                capability & WLAN_CAPABILITY_PRIVACY ? "on" :
                                "off");
                return 0;
        }

        if (ether_addr_equal(network->bssid, priv->bssid)) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of the same BSSID match: %pM.\n",
                                network->ssid_len, network->ssid,
                                network->bssid, priv->bssid);
                return 0;
        }

        /* Filter out any incompatible freq / mode combinations */
        if (!libipw_is_valid_mode(priv->ieee, network->mode)) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of invalid frequency/mode combination.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        /* Ensure that the rates supported by the driver are compatible with
         * this AP, including verification of basic rates (mandatory) */
        if (!ipw_compatible_rates(priv, network, &rates)) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because configured rate mask excludes AP mandatory rate.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        if (rates.num_rates == 0) {
                IPW_DEBUG_MERGE("Network '%*pE (%pM)' excluded because of no compatible rates.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        /* TODO: Perform any further minimal comparititive tests.  We do not
         * want to put too much policy logic here; intelligent scan selection
         * should occur within a generic IEEE 802.11 user space tool.  */

        /* Set up 'new' AP to this network */
        ipw_copy_rates(&match->rates, &rates);
        match->network = network;
        IPW_DEBUG_MERGE("Network '%*pE (%pM)' is a viable match.\n",
                        network->ssid_len, network->ssid, network->bssid);

        return 1;
}

static void ipw_merge_adhoc_network(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, merge_networks);
        struct libipw_network *network = NULL;
        struct ipw_network_match match = {
                .network = priv->assoc_network
        };

        if ((priv->status & STATUS_ASSOCIATED) &&
            (priv->ieee->iw_mode == IW_MODE_ADHOC)) {
                /* First pass through ROAM process -- look for a better
                 * network */
                unsigned long flags;

                spin_lock_irqsave(&priv->ieee->lock, flags);
                list_for_each_entry(network, &priv->ieee->network_list, list) {
                        if (network != priv->assoc_network)
                                ipw_find_adhoc_network(priv, &match, network,
                                                       1);
                }
                spin_unlock_irqrestore(&priv->ieee->lock, flags);

                if (match.network == priv->assoc_network) {
                        IPW_DEBUG_MERGE("No better ADHOC in this network to "
                                        "merge to.\n");
                        return;
                }

                mutex_lock(&priv->mutex);
                if ((priv->ieee->iw_mode == IW_MODE_ADHOC)) {
                        IPW_DEBUG_MERGE("remove network %*pE\n",
                                        priv->essid_len, priv->essid);
                        ipw_remove_current_network(priv);
                }

                ipw_disassociate(priv);
                priv->assoc_network = match.network;
                mutex_unlock(&priv->mutex);
                return;
        }
}

static int ipw_best_network(struct ipw_priv *priv,
                            struct ipw_network_match *match,
                            struct libipw_network *network, int roaming)
{
        struct ipw_supported_rates rates;

        /* Verify that this network's capability is compatible with the
         * current mode (AdHoc or Infrastructure) */
        if ((priv->ieee->iw_mode == IW_MODE_INFRA &&
             !(network->capability & WLAN_CAPABILITY_ESS)) ||
            (priv->ieee->iw_mode == IW_MODE_ADHOC &&
             !(network->capability & WLAN_CAPABILITY_IBSS))) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded due to capability mismatch.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        if (unlikely(roaming)) {
                /* If we are roaming, then ensure check if this is a valid
                 * network to try and roam to */
                if ((network->ssid_len != match->network->ssid_len) ||
                    memcmp(network->ssid, match->network->ssid,
                           network->ssid_len)) {
                        IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of non-network ESSID.\n",
                                        network->ssid_len, network->ssid,
                                        network->bssid);
                        return 0;
                }
        } else {
                /* If an ESSID has been configured then compare the broadcast
                 * ESSID to ours */
                if ((priv->config & CFG_STATIC_ESSID) &&
                    ((network->ssid_len != priv->essid_len) ||
                     memcmp(network->ssid, priv->essid,
                            min(network->ssid_len, priv->essid_len)))) {
                        IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of ESSID mismatch: '%*pE'.\n",
                                        network->ssid_len, network->ssid,
                                        network->bssid, priv->essid_len,
                                        priv->essid);
                        return 0;
                }
        }

        /* If the old network rate is better than this one, don't bother
         * testing everything else. */
        if (match->network && match->network->stats.rssi > network->stats.rssi) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because '%*pE (%pM)' has a stronger signal.\n",
                                network->ssid_len, network->ssid,
                                network->bssid, match->network->ssid_len,
                                match->network->ssid, match->network->bssid);
                return 0;
        }

        /* If this network has already had an association attempt within the
         * last 3 seconds, do not try and associate again... */
        if (network->last_associate &&
            time_after(network->last_associate + (HZ * 3UL), jiffies)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of storming (%ums since last assoc attempt).\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                jiffies_to_msecs(jiffies -
                                                 network->last_associate));
                return 0;
        }

        /* Now go through and see if the requested network is valid... */
        if (priv->ieee->scan_age != 0 &&
            time_after(jiffies, network->last_scanned + priv->ieee->scan_age)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of age: %ums.\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                jiffies_to_msecs(jiffies -
                                                 network->last_scanned));
                return 0;
        }

        if ((priv->config & CFG_STATIC_CHANNEL) &&
            (network->channel != priv->channel)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of channel mismatch: %d != %d.\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                network->channel, priv->channel);
                return 0;
        }

        /* Verify privacy compatibility */
        if (((priv->capability & CAP_PRIVACY_ON) ? 1 : 0) !=
            ((network->capability & WLAN_CAPABILITY_PRIVACY) ? 1 : 0)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of privacy mismatch: %s != %s.\n",
                                network->ssid_len, network->ssid,
                                network->bssid,
                                priv->capability & CAP_PRIVACY_ON ? "on" :
                                "off",
                                network->capability &
                                WLAN_CAPABILITY_PRIVACY ? "on" : "off");
                return 0;
        }

        if ((priv->config & CFG_STATIC_BSSID) &&
            !ether_addr_equal(network->bssid, priv->bssid)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of BSSID mismatch: %pM.\n",
                                network->ssid_len, network->ssid,
                                network->bssid, priv->bssid);
                return 0;
        }

        /* Filter out any incompatible freq / mode combinations */
        if (!libipw_is_valid_mode(priv->ieee, network->mode)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of invalid frequency/mode combination.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        /* Filter out invalid channel in current GEO */
        if (!libipw_is_valid_channel(priv->ieee, network->channel)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of invalid channel in current GEO\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        /* Ensure that the rates supported by the driver are compatible with
         * this AP, including verification of basic rates (mandatory) */
        if (!ipw_compatible_rates(priv, network, &rates)) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because configured rate mask excludes AP mandatory rate.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        if (rates.num_rates == 0) {
                IPW_DEBUG_ASSOC("Network '%*pE (%pM)' excluded because of no compatible rates.\n",
                                network->ssid_len, network->ssid,
                                network->bssid);
                return 0;
        }

        /* TODO: Perform any further minimal comparititive tests.  We do not
         * want to put too much policy logic here; intelligent scan selection
         * should occur within a generic IEEE 802.11 user space tool.  */

        /* Set up 'new' AP to this network */
        ipw_copy_rates(&match->rates, &rates);
        match->network = network;

        IPW_DEBUG_ASSOC("Network '%*pE (%pM)' is a viable match.\n",
                        network->ssid_len, network->ssid, network->bssid);

        return 1;
}

static void ipw_adhoc_create(struct ipw_priv *priv,
                             struct libipw_network *network)
{
        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
        int i;

        /*
         * For the purposes of scanning, we can set our wireless mode
         * to trigger scans across combinations of bands, but when it
         * comes to creating a new ad-hoc network, we have tell the FW
         * exactly which band to use.
         *
         * We also have the possibility of an invalid channel for the
         * chossen band.  Attempting to create a new ad-hoc network
         * with an invalid channel for wireless mode will trigger a
         * FW fatal error.
         *
         */
        switch (libipw_is_valid_channel(priv->ieee, priv->channel)) {
        case LIBIPW_52GHZ_BAND:
                network->mode = IEEE_A;
                i = libipw_channel_to_index(priv->ieee, priv->channel);
                BUG_ON(i == -1);
                if (geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY) {
                        IPW_WARNING("Overriding invalid channel\n");
                        priv->channel = geo->a[0].channel;
                }
                break;

        case LIBIPW_24GHZ_BAND:
                if (priv->ieee->mode & IEEE_G)
                        network->mode = IEEE_G;
                else
                        network->mode = IEEE_B;
                i = libipw_channel_to_index(priv->ieee, priv->channel);
                BUG_ON(i == -1);
                if (geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY) {
                        IPW_WARNING("Overriding invalid channel\n");
                        priv->channel = geo->bg[0].channel;
                }
                break;

        default:
                IPW_WARNING("Overriding invalid channel\n");
                if (priv->ieee->mode & IEEE_A) {
                        network->mode = IEEE_A;
                        priv->channel = geo->a[0].channel;
                } else if (priv->ieee->mode & IEEE_G) {
                        network->mode = IEEE_G;
                        priv->channel = geo->bg[0].channel;
                } else {
                        network->mode = IEEE_B;
                        priv->channel = geo->bg[0].channel;
                }
                break;
        }

        network->channel = priv->channel;
        priv->config |= CFG_ADHOC_PERSIST;
        ipw_create_bssid(priv, network->bssid);
        network->ssid_len = priv->essid_len;
        memcpy(network->ssid, priv->essid, priv->essid_len);
        memset(&network->stats, 0, sizeof(network->stats));
        network->capability = WLAN_CAPABILITY_IBSS;
        if (!(priv->config & CFG_PREAMBLE_LONG))
                network->capability |= WLAN_CAPABILITY_SHORT_PREAMBLE;
        if (priv->capability & CAP_PRIVACY_ON)
                network->capability |= WLAN_CAPABILITY_PRIVACY;
        network->rates_len = min(priv->rates.num_rates, MAX_RATES_LENGTH);
        memcpy(network->rates, priv->rates.supported_rates, network->rates_len);
        network->rates_ex_len = priv->rates.num_rates - network->rates_len;
        memcpy(network->rates_ex,
               &priv->rates.supported_rates[network->rates_len],
               network->rates_ex_len);
        network->last_scanned = 0;
        network->flags = 0;
        network->last_associate = 0;
        network->time_stamp[0] = 0;
        network->time_stamp[1] = 0;
        network->beacon_interval = 100; /* Default */
        network->listen_interval = 10;  /* Default */
        network->atim_window = 0;       /* Default */
        network->wpa_ie_len = 0;
        network->rsn_ie_len = 0;
}

static void ipw_send_tgi_tx_key(struct ipw_priv *priv, int type, int index)
{
        struct ipw_tgi_tx_key key;

        if (!(priv->ieee->sec.flags & (1 << index)))
                return;

        key.key_id = index;
        memcpy(key.key, priv->ieee->sec.keys[index], SCM_TEMPORAL_KEY_LENGTH);
        key.security_type = type;
        key.station_index = 0;  /* always 0 for BSS */
        key.flags = 0;
        /* 0 for new key; previous value of counter (after fatal error) */
        key.tx_counter[0] = cpu_to_le32(0);
        key.tx_counter[1] = cpu_to_le32(0);

        ipw_send_cmd_pdu(priv, IPW_CMD_TGI_TX_KEY, sizeof(key), &key);
}

static void ipw_send_wep_keys(struct ipw_priv *priv, int type)
{
        struct ipw_wep_key key;
        int i;

        key.cmd_id = DINO_CMD_WEP_KEY;
        key.seq_num = 0;

        /* Note: AES keys cannot be set for multiple times.
         * Only set it at the first time. */
        for (i = 0; i < 4; i++) {
                key.key_index = i | type;
                if (!(priv->ieee->sec.flags & (1 << i))) {
                        key.key_size = 0;
                        continue;
                }

                key.key_size = priv->ieee->sec.key_sizes[i];
                memcpy(key.key, priv->ieee->sec.keys[i], key.key_size);

                ipw_send_cmd_pdu(priv, IPW_CMD_WEP_KEY, sizeof(key), &key);
        }
}

static void ipw_set_hw_decrypt_unicast(struct ipw_priv *priv, int level)
{
        if (priv->ieee->host_encrypt)
                return;

        switch (level) {
        case SEC_LEVEL_3:
                priv->sys_config.disable_unicast_decryption = 0;
                priv->ieee->host_decrypt = 0;
                break;
        case SEC_LEVEL_2:
                priv->sys_config.disable_unicast_decryption = 1;
                priv->ieee->host_decrypt = 1;
                break;
        case SEC_LEVEL_1:
                priv->sys_config.disable_unicast_decryption = 0;
                priv->ieee->host_decrypt = 0;
                break;
        case SEC_LEVEL_0:
                priv->sys_config.disable_unicast_decryption = 1;
                break;
        default:
                break;
        }
}

static void ipw_set_hw_decrypt_multicast(struct ipw_priv *priv, int level)
{
        if (priv->ieee->host_encrypt)
                return;

        switch (level) {
        case SEC_LEVEL_3:
                priv->sys_config.disable_multicast_decryption = 0;
                break;
        case SEC_LEVEL_2:
                priv->sys_config.disable_multicast_decryption = 1;
                break;
        case SEC_LEVEL_1:
                priv->sys_config.disable_multicast_decryption = 0;
                break;
        case SEC_LEVEL_0:
                priv->sys_config.disable_multicast_decryption = 1;
                break;
        default:
                break;
        }
}

static void ipw_set_hwcrypto_keys(struct ipw_priv *priv)
{
        switch (priv->ieee->sec.level) {
        case SEC_LEVEL_3:
                if (priv->ieee->sec.flags & SEC_ACTIVE_KEY)
                        ipw_send_tgi_tx_key(priv,
                                            DCT_FLAG_EXT_SECURITY_CCM,
                                            priv->ieee->sec.active_key);

                if (!priv->ieee->host_mc_decrypt)
                        ipw_send_wep_keys(priv, DCW_WEP_KEY_SEC_TYPE_CCM);
                break;
        case SEC_LEVEL_2:
                if (priv->ieee->sec.flags & SEC_ACTIVE_KEY)
                        ipw_send_tgi_tx_key(priv,
                                            DCT_FLAG_EXT_SECURITY_TKIP,
                                            priv->ieee->sec.active_key);
                break;
        case SEC_LEVEL_1:
                ipw_send_wep_keys(priv, DCW_WEP_KEY_SEC_TYPE_WEP);
                ipw_set_hw_decrypt_unicast(priv, priv->ieee->sec.level);
                ipw_set_hw_decrypt_multicast(priv, priv->ieee->sec.level);
                break;
        case SEC_LEVEL_0:
        default:
                break;
        }
}

static void ipw_adhoc_check(void *data)
{
        struct ipw_priv *priv = data;

        if (priv->missed_adhoc_beacons++ > priv->disassociate_threshold &&
            !(priv->config & CFG_ADHOC_PERSIST)) {
                IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF |
                          IPW_DL_STATE | IPW_DL_ASSOC,
                          "Missed beacon: %d - disassociate\n",
                          priv->missed_adhoc_beacons);
                ipw_remove_current_network(priv);
                ipw_disassociate(priv);
                return;
        }

        schedule_delayed_work(&priv->adhoc_check,
                              le16_to_cpu(priv->assoc_request.beacon_interval));
}

static void ipw_bg_adhoc_check(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, adhoc_check.work);
        mutex_lock(&priv->mutex);
        ipw_adhoc_check(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_debug_config(struct ipw_priv *priv)
{
        IPW_DEBUG_INFO("Scan completed, no valid APs matched "
                       "[CFG 0x%08X]\n", priv->config);
        if (priv->config & CFG_STATIC_CHANNEL)
                IPW_DEBUG_INFO("Channel locked to %d\n", priv->channel);
        else
                IPW_DEBUG_INFO("Channel unlocked.\n");
        if (priv->config & CFG_STATIC_ESSID)
                IPW_DEBUG_INFO("ESSID locked to '%*pE'\n",
                               priv->essid_len, priv->essid);
        else
                IPW_DEBUG_INFO("ESSID unlocked.\n");
        if (priv->config & CFG_STATIC_BSSID)
                IPW_DEBUG_INFO("BSSID locked to %pM\n", priv->bssid);
        else
                IPW_DEBUG_INFO("BSSID unlocked.\n");
        if (priv->capability & CAP_PRIVACY_ON)
                IPW_DEBUG_INFO("PRIVACY on\n");
        else
                IPW_DEBUG_INFO("PRIVACY off\n");
        IPW_DEBUG_INFO("RATE MASK: 0x%08X\n", priv->rates_mask);
}

static void ipw_set_fixed_rate(struct ipw_priv *priv, int mode)
{
        /* TODO: Verify that this works... */
        struct ipw_fixed_rate fr;
        u32 reg;
        u16 mask = 0;
        u16 new_tx_rates = priv->rates_mask;

        /* Identify 'current FW band' and match it with the fixed
         * Tx rates */

        switch (priv->ieee->freq_band) {
        case LIBIPW_52GHZ_BAND: /* A only */
                /* IEEE_A */
                if (priv->rates_mask & ~LIBIPW_OFDM_RATES_MASK) {
                        /* Invalid fixed rate mask */
                        IPW_DEBUG_WX
                            ("invalid fixed rate mask in ipw_set_fixed_rate\n");
                        new_tx_rates = 0;
                        break;
                }

                new_tx_rates >>= LIBIPW_OFDM_SHIFT_MASK_A;
                break;

        default:                /* 2.4Ghz or Mixed */
                /* IEEE_B */
                if (mode == IEEE_B) {
                        if (new_tx_rates & ~LIBIPW_CCK_RATES_MASK) {
                                /* Invalid fixed rate mask */
                                IPW_DEBUG_WX
                                    ("invalid fixed rate mask in ipw_set_fixed_rate\n");
                                new_tx_rates = 0;
                        }
                        break;
                }

                /* IEEE_G */
                if (new_tx_rates & ~(LIBIPW_CCK_RATES_MASK |
                                    LIBIPW_OFDM_RATES_MASK)) {
                        /* Invalid fixed rate mask */
                        IPW_DEBUG_WX
                            ("invalid fixed rate mask in ipw_set_fixed_rate\n");
                        new_tx_rates = 0;
                        break;
                }

                if (LIBIPW_OFDM_RATE_6MB_MASK & new_tx_rates) {
                        mask |= (LIBIPW_OFDM_RATE_6MB_MASK >> 1);
                        new_tx_rates &= ~LIBIPW_OFDM_RATE_6MB_MASK;
                }

                if (LIBIPW_OFDM_RATE_9MB_MASK & new_tx_rates) {
                        mask |= (LIBIPW_OFDM_RATE_9MB_MASK >> 1);
                        new_tx_rates &= ~LIBIPW_OFDM_RATE_9MB_MASK;
                }

                if (LIBIPW_OFDM_RATE_12MB_MASK & new_tx_rates) {
                        mask |= (LIBIPW_OFDM_RATE_12MB_MASK >> 1);
                        new_tx_rates &= ~LIBIPW_OFDM_RATE_12MB_MASK;
                }

                new_tx_rates |= mask;
                break;
        }

        fr.tx_rates = cpu_to_le16(new_tx_rates);

        reg = ipw_read32(priv, IPW_MEM_FIXED_OVERRIDE);
        ipw_write_reg32(priv, reg, *(u32 *) & fr);
}

static void ipw_abort_scan(struct ipw_priv *priv)
{
        int err;

        if (priv->status & STATUS_SCAN_ABORTING) {
                IPW_DEBUG_HC("Ignoring concurrent scan abort request.\n");
                return;
        }
        priv->status |= STATUS_SCAN_ABORTING;

        err = ipw_send_scan_abort(priv);
        if (err)
                IPW_DEBUG_HC("Request to abort scan failed.\n");
}

static void ipw_add_scan_channels(struct ipw_priv *priv,
                                  struct ipw_scan_request_ext *scan,
                                  int scan_type)
{
        int channel_index = 0;
        const struct libipw_geo *geo;
        int i;

        geo = libipw_get_geo(priv->ieee);

        if (priv->ieee->freq_band & LIBIPW_52GHZ_BAND) {
                int start = channel_index;
                for (i = 0; i < geo->a_channels; i++) {
                        if ((priv->status & STATUS_ASSOCIATED) &&
                            geo->a[i].channel == priv->channel)
                                continue;
                        channel_index++;
                        scan->channels_list[channel_index] = geo->a[i].channel;
                        ipw_set_scan_type(scan, channel_index,
                                          geo->a[i].
                                          flags & LIBIPW_CH_PASSIVE_ONLY ?
                                          IPW_SCAN_PASSIVE_FULL_DWELL_SCAN :
                                          scan_type);
                }

                if (start != channel_index) {
                        scan->channels_list[start] = (u8) (IPW_A_MODE << 6) |
                            (channel_index - start);
                        channel_index++;
                }
        }

        if (priv->ieee->freq_band & LIBIPW_24GHZ_BAND) {
                int start = channel_index;
                if (priv->config & CFG_SPEED_SCAN) {
                        int index;
                        u8 channels[LIBIPW_24GHZ_CHANNELS] = {
                                /* nop out the list */
                                [0] = 0
                        };

                        u8 channel;
                        while (channel_index < IPW_SCAN_CHANNELS - 1) {
                                channel =
                                    priv->speed_scan[priv->speed_scan_pos];
                                if (channel == 0) {
                                        priv->speed_scan_pos = 0;
                                        channel = priv->speed_scan[0];
                                }
                                if ((priv->status & STATUS_ASSOCIATED) &&
                                    channel == priv->channel) {
                                        priv->speed_scan_pos++;
                                        continue;
                                }

                                /* If this channel has already been
                                 * added in scan, break from loop
                                 * and this will be the first channel
                                 * in the next scan.
                                 */
                                if (channels[channel - 1] != 0)
                                        break;

                                channels[channel - 1] = 1;
                                priv->speed_scan_pos++;
                                channel_index++;
                                scan->channels_list[channel_index] = channel;
                                index =
                                    libipw_channel_to_index(priv->ieee, channel);
                                ipw_set_scan_type(scan, channel_index,
                                                  geo->bg[index].
                                                  flags &
                                                  LIBIPW_CH_PASSIVE_ONLY ?
                                                  IPW_SCAN_PASSIVE_FULL_DWELL_SCAN
                                                  : scan_type);
                        }
                } else {
                        for (i = 0; i < geo->bg_channels; i++) {
                                if ((priv->status & STATUS_ASSOCIATED) &&
                                    geo->bg[i].channel == priv->channel)
                                        continue;
                                channel_index++;
                                scan->channels_list[channel_index] =
                                    geo->bg[i].channel;
                                ipw_set_scan_type(scan, channel_index,
                                                  geo->bg[i].
                                                  flags &
                                                  LIBIPW_CH_PASSIVE_ONLY ?
                                                  IPW_SCAN_PASSIVE_FULL_DWELL_SCAN
                                                  : scan_type);
                        }
                }

                if (start != channel_index) {
                        scan->channels_list[start] = (u8) (IPW_B_MODE << 6) |
                            (channel_index - start);
                }
        }
}

static int ipw_passive_dwell_time(struct ipw_priv *priv)
{
        /* staying on passive channels longer than the DTIM interval during a
         * scan, while associated, causes the firmware to cancel the scan
         * without notification. Hence, don't stay on passive channels longer
         * than the beacon interval.
         */
        if (priv->status & STATUS_ASSOCIATED
            && priv->assoc_network->beacon_interval > 10)
                return priv->assoc_network->beacon_interval - 10;
        else
                return 120;
}

static int ipw_request_scan_helper(struct ipw_priv *priv, int type, int direct)
{
        struct ipw_scan_request_ext scan;
        int err = 0, scan_type;

        if (!(priv->status & STATUS_INIT) ||
            (priv->status & STATUS_EXIT_PENDING))
                return 0;

        mutex_lock(&priv->mutex);

        if (direct && (priv->direct_scan_ssid_len == 0)) {
                IPW_DEBUG_HC("Direct scan requested but no SSID to scan for\n");
                priv->status &= ~STATUS_DIRECT_SCAN_PENDING;
                goto done;
        }

        if (priv->status & STATUS_SCANNING) {
                IPW_DEBUG_HC("Concurrent scan requested.  Queuing.\n");
                priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING :
                                        STATUS_SCAN_PENDING;
                goto done;
        }

        if (!(priv->status & STATUS_SCAN_FORCED) &&
            priv->status & STATUS_SCAN_ABORTING) {
                IPW_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
                priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING :
                                        STATUS_SCAN_PENDING;
                goto done;
        }

        if (priv->status & STATUS_RF_KILL_MASK) {
                IPW_DEBUG_HC("Queuing scan due to RF Kill activation\n");
                priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING :
                                        STATUS_SCAN_PENDING;
                goto done;
        }

        memset(&scan, 0, sizeof(scan));
        scan.full_scan_index = cpu_to_le32(libipw_get_scans(priv->ieee));

        if (type == IW_SCAN_TYPE_PASSIVE) {
                IPW_DEBUG_WX("use passive scanning\n");
                scan_type = IPW_SCAN_PASSIVE_FULL_DWELL_SCAN;
                scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] =
                        cpu_to_le16(ipw_passive_dwell_time(priv));
                ipw_add_scan_channels(priv, &scan, scan_type);
                goto send_request;
        }

        /* Use active scan by default. */
        if (priv->config & CFG_SPEED_SCAN)
                scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] =
                        cpu_to_le16(30);
        else
                scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] =
                        cpu_to_le16(20);

        scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN] =
                cpu_to_le16(20);

        scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] =
                cpu_to_le16(ipw_passive_dwell_time(priv));
        scan.dwell_time[IPW_SCAN_ACTIVE_DIRECT_SCAN] = cpu_to_le16(20);

#ifdef CONFIG_IPW2200_MONITOR
        if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
                u8 channel;
                u8 band = 0;

                switch (libipw_is_valid_channel(priv->ieee, priv->channel)) {
                case LIBIPW_52GHZ_BAND:
                        band = (u8) (IPW_A_MODE << 6) | 1;
                        channel = priv->channel;
                        break;

                case LIBIPW_24GHZ_BAND:
                        band = (u8) (IPW_B_MODE << 6) | 1;
                        channel = priv->channel;
                        break;

                default:
                        band = (u8) (IPW_B_MODE << 6) | 1;
                        channel = 9;
                        break;
                }

                scan.channels_list[0] = band;
                scan.channels_list[1] = channel;
                ipw_set_scan_type(&scan, 1, IPW_SCAN_PASSIVE_FULL_DWELL_SCAN);

                /* NOTE:  The card will sit on this channel for this time
                 * period.  Scan aborts are timing sensitive and frequently
                 * result in firmware restarts.  As such, it is best to
                 * set a small dwell_time here and just keep re-issuing
                 * scans.  Otherwise fast channel hopping will not actually
                 * hop channels.
                 *
                 * TODO: Move SPEED SCAN support to all modes and bands */
                scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] =
                        cpu_to_le16(2000);
        } else {
#endif                          /* CONFIG_IPW2200_MONITOR */
                /* Honor direct scans first, otherwise if we are roaming make
                 * this a direct scan for the current network.  Finally,
                 * ensure that every other scan is a fast channel hop scan */
                if (direct) {
                        err = ipw_send_ssid(priv, priv->direct_scan_ssid,
                                            priv->direct_scan_ssid_len);
                        if (err) {
                                IPW_DEBUG_HC("Attempt to send SSID command  "
                                             "failed\n");
                                goto done;
                        }

                        scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN;
                } else if ((priv->status & STATUS_ROAMING)
                           || (!(priv->status & STATUS_ASSOCIATED)
                               && (priv->config & CFG_STATIC_ESSID)
                               && (le32_to_cpu(scan.full_scan_index) % 2))) {
                        err = ipw_send_ssid(priv, priv->essid, priv->essid_len);
                        if (err) {
                                IPW_DEBUG_HC("Attempt to send SSID command "
                                             "failed.\n");
                                goto done;
                        }

                        scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN;
                } else
                        scan_type = IPW_SCAN_ACTIVE_BROADCAST_SCAN;

                ipw_add_scan_channels(priv, &scan, scan_type);
#ifdef CONFIG_IPW2200_MONITOR
        }
#endif

send_request:
        err = ipw_send_scan_request_ext(priv, &scan);
        if (err) {
                IPW_DEBUG_HC("Sending scan command failed: %08X\n", err);
                goto done;
        }

        priv->status |= STATUS_SCANNING;
        if (direct) {
                priv->status &= ~STATUS_DIRECT_SCAN_PENDING;
                priv->direct_scan_ssid_len = 0;
        } else
                priv->status &= ~STATUS_SCAN_PENDING;

        schedule_delayed_work(&priv->scan_check, IPW_SCAN_CHECK_WATCHDOG);
done:
        mutex_unlock(&priv->mutex);
        return err;
}

static void ipw_request_passive_scan(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, request_passive_scan.work);
        ipw_request_scan_helper(priv, IW_SCAN_TYPE_PASSIVE, 0);
}

static void ipw_request_scan(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, request_scan.work);
        ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE, 0);
}

static void ipw_request_direct_scan(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, request_direct_scan.work);
        ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE, 1);
}

static void ipw_bg_abort_scan(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, abort_scan);
        mutex_lock(&priv->mutex);
        ipw_abort_scan(priv);
        mutex_unlock(&priv->mutex);
}

static int ipw_wpa_enable(struct ipw_priv *priv, int value)
{
        /* This is called when wpa_supplicant loads and closes the driver
         * interface. */
        priv->ieee->wpa_enabled = value;
        return 0;
}

static int ipw_wpa_set_auth_algs(struct ipw_priv *priv, int value)
{
        struct libipw_device *ieee = priv->ieee;
        struct libipw_security sec = {
                .flags = SEC_AUTH_MODE,
        };
        int ret = 0;

        if (value & IW_AUTH_ALG_SHARED_KEY) {
                sec.auth_mode = WLAN_AUTH_SHARED_KEY;
                ieee->open_wep = 0;
        } else if (value & IW_AUTH_ALG_OPEN_SYSTEM) {
                sec.auth_mode = WLAN_AUTH_OPEN;
                ieee->open_wep = 1;
        } else if (value & IW_AUTH_ALG_LEAP) {
                sec.auth_mode = WLAN_AUTH_LEAP;
                ieee->open_wep = 1;
        } else
                return -EINVAL;

        if (ieee->set_security)
                ieee->set_security(ieee->dev, &sec);
        else
                ret = -EOPNOTSUPP;

        return ret;
}

static void ipw_wpa_assoc_frame(struct ipw_priv *priv, char *wpa_ie,
                                int wpa_ie_len)
{
        /* make sure WPA is enabled */
        ipw_wpa_enable(priv, 1);
}

static int ipw_set_rsn_capa(struct ipw_priv *priv,
                            char *capabilities, int length)
{
        IPW_DEBUG_HC("HOST_CMD_RSN_CAPABILITIES\n");

        return ipw_send_cmd_pdu(priv, IPW_CMD_RSN_CAPABILITIES, length,
                                capabilities);
}

/*
 * WE-18 support
 */

/* SIOCSIWGENIE */
static int ipw_wx_set_genie(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct libipw_device *ieee = priv->ieee;
        u8 *buf;
        int err = 0;

        if (wrqu->data.length > MAX_WPA_IE_LEN ||
            (wrqu->data.length && extra == NULL))
                return -EINVAL;

        if (wrqu->data.length) {
                buf = kmemdup(extra, wrqu->data.length, GFP_KERNEL);
                if (buf == NULL) {
                        err = -ENOMEM;
                        goto out;
                }

                kfree(ieee->wpa_ie);
                ieee->wpa_ie = buf;
                ieee->wpa_ie_len = wrqu->data.length;
        } else {
                kfree(ieee->wpa_ie);
                ieee->wpa_ie = NULL;
                ieee->wpa_ie_len = 0;
        }

        ipw_wpa_assoc_frame(priv, ieee->wpa_ie, ieee->wpa_ie_len);
      out:
        return err;
}

/* SIOCGIWGENIE */
static int ipw_wx_get_genie(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct libipw_device *ieee = priv->ieee;
        int err = 0;

        if (ieee->wpa_ie_len == 0 || ieee->wpa_ie == NULL) {
                wrqu->data.length = 0;
                goto out;
        }

        if (wrqu->data.length < ieee->wpa_ie_len) {
                err = -E2BIG;
                goto out;
        }

        wrqu->data.length = ieee->wpa_ie_len;
        memcpy(extra, ieee->wpa_ie, ieee->wpa_ie_len);

      out:
        return err;
}

static int wext_cipher2level(int cipher)
{
        switch (cipher) {
        case IW_AUTH_CIPHER_NONE:
                return SEC_LEVEL_0;
        case IW_AUTH_CIPHER_WEP40:
        case IW_AUTH_CIPHER_WEP104:
                return SEC_LEVEL_1;
        case IW_AUTH_CIPHER_TKIP:
                return SEC_LEVEL_2;
        case IW_AUTH_CIPHER_CCMP:
                return SEC_LEVEL_3;
        default:
                return -1;
        }
}

/* SIOCSIWAUTH */
static int ipw_wx_set_auth(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct libipw_device *ieee = priv->ieee;
        struct iw_param *param = &wrqu->param;
        struct lib80211_crypt_data *crypt;
        unsigned long flags;
        int ret = 0;

        switch (param->flags & IW_AUTH_INDEX) {
        case IW_AUTH_WPA_VERSION:
                break;
        case IW_AUTH_CIPHER_PAIRWISE:
                ipw_set_hw_decrypt_unicast(priv,
                                           wext_cipher2level(param->value));
                break;
        case IW_AUTH_CIPHER_GROUP:
                ipw_set_hw_decrypt_multicast(priv,
                                             wext_cipher2level(param->value));
                break;
        case IW_AUTH_KEY_MGMT:
                /*
                 * ipw2200 does not use these parameters
                 */
                break;

        case IW_AUTH_TKIP_COUNTERMEASURES:
                crypt = priv->ieee->crypt_info.crypt[priv->ieee->crypt_info.tx_keyidx];
                if (!crypt || !crypt->ops->set_flags || !crypt->ops->get_flags)
                        break;

                flags = crypt->ops->get_flags(crypt->priv);

                if (param->value)
                        flags |= IEEE80211_CRYPTO_TKIP_COUNTERMEASURES;
                else
                        flags &= ~IEEE80211_CRYPTO_TKIP_COUNTERMEASURES;

                crypt->ops->set_flags(flags, crypt->priv);

                break;

        case IW_AUTH_DROP_UNENCRYPTED:{
                        /* HACK:
                         *
                         * wpa_supplicant calls set_wpa_enabled when the driver
                         * is loaded and unloaded, regardless of if WPA is being
                         * used.  No other calls are made which can be used to
                         * determine if encryption will be used or not prior to
                         * association being expected.  If encryption is not being
                         * used, drop_unencrypted is set to false, else true -- we
                         * can use this to determine if the CAP_PRIVACY_ON bit should
                         * be set.
                         */
                        struct libipw_security sec = {
                                .flags = SEC_ENABLED,
                                .enabled = param->value,
                        };
                        priv->ieee->drop_unencrypted = param->value;
                        /* We only change SEC_LEVEL for open mode. Others
                         * are set by ipw_wpa_set_encryption.
                         */
                        if (!param->value) {
                                sec.flags |= SEC_LEVEL;
                                sec.level = SEC_LEVEL_0;
                        } else {
                                sec.flags |= SEC_LEVEL;
                                sec.level = SEC_LEVEL_1;
                        }
                        if (priv->ieee->set_security)
                                priv->ieee->set_security(priv->ieee->dev, &sec);
                        break;
                }

        case IW_AUTH_80211_AUTH_ALG:
                ret = ipw_wpa_set_auth_algs(priv, param->value);
                break;

        case IW_AUTH_WPA_ENABLED:
                ret = ipw_wpa_enable(priv, param->value);
                ipw_disassociate(priv);
                break;

        case IW_AUTH_RX_UNENCRYPTED_EAPOL:
                ieee->ieee802_1x = param->value;
                break;

        case IW_AUTH_PRIVACY_INVOKED:
                ieee->privacy_invoked = param->value;
                break;

        default:
                return -EOPNOTSUPP;
        }
        return ret;
}

/* SIOCGIWAUTH */
static int ipw_wx_get_auth(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct libipw_device *ieee = priv->ieee;
        struct lib80211_crypt_data *crypt;
        struct iw_param *param = &wrqu->param;

        switch (param->flags & IW_AUTH_INDEX) {
        case IW_AUTH_WPA_VERSION:
        case IW_AUTH_CIPHER_PAIRWISE:
        case IW_AUTH_CIPHER_GROUP:
        case IW_AUTH_KEY_MGMT:
                /*
                 * wpa_supplicant will control these internally
                 */
                return -EOPNOTSUPP;

        case IW_AUTH_TKIP_COUNTERMEASURES:
                crypt = priv->ieee->crypt_info.crypt[priv->ieee->crypt_info.tx_keyidx];
                if (!crypt || !crypt->ops->get_flags)
                        break;

                param->value = (crypt->ops->get_flags(crypt->priv) &
                                IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) ? 1 : 0;

                break;

        case IW_AUTH_DROP_UNENCRYPTED:
                param->value = ieee->drop_unencrypted;
                break;

        case IW_AUTH_80211_AUTH_ALG:
                param->value = ieee->sec.auth_mode;
                break;

        case IW_AUTH_WPA_ENABLED:
                param->value = ieee->wpa_enabled;
                break;

        case IW_AUTH_RX_UNENCRYPTED_EAPOL:
                param->value = ieee->ieee802_1x;
                break;

        case IW_AUTH_ROAMING_CONTROL:
        case IW_AUTH_PRIVACY_INVOKED:
                param->value = ieee->privacy_invoked;
                break;

        default:
                return -EOPNOTSUPP;
        }
        return 0;
}

/* SIOCSIWENCODEEXT */
static int ipw_wx_set_encodeext(struct net_device *dev,
                                struct iw_request_info *info,
                                union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;

        if (hwcrypto) {
                if (ext->alg == IW_ENCODE_ALG_TKIP) {
                        /* IPW HW can't build TKIP MIC,
                           host decryption still needed */
                        if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY)
                                priv->ieee->host_mc_decrypt = 1;
                        else {
                                priv->ieee->host_encrypt = 0;
                                priv->ieee->host_encrypt_msdu = 1;
                                priv->ieee->host_decrypt = 1;
                        }
                } else {
                        priv->ieee->host_encrypt = 0;
                        priv->ieee->host_encrypt_msdu = 0;
                        priv->ieee->host_decrypt = 0;
                        priv->ieee->host_mc_decrypt = 0;
                }
        }

        return libipw_wx_set_encodeext(priv->ieee, info, wrqu, extra);
}

/* SIOCGIWENCODEEXT */
static int ipw_wx_get_encodeext(struct net_device *dev,
                                struct iw_request_info *info,
                                union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        return libipw_wx_get_encodeext(priv->ieee, info, wrqu, extra);
}

/* SIOCSIWMLME */
static int ipw_wx_set_mlme(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct iw_mlme *mlme = (struct iw_mlme *)extra;
        __le16 reason;

        reason = cpu_to_le16(mlme->reason_code);

        switch (mlme->cmd) {
        case IW_MLME_DEAUTH:
                /* silently ignore */
                break;

        case IW_MLME_DISASSOC:
                ipw_disassociate(priv);
                break;

        default:
                return -EOPNOTSUPP;
        }
        return 0;
}

#ifdef CONFIG_IPW2200_QOS

/* QoS */
/*
* get the modulation type of the current network or
* the card current mode
*/
static u8 ipw_qos_current_mode(struct ipw_priv * priv)
{
        u8 mode = 0;

        if (priv->status & STATUS_ASSOCIATED) {
                unsigned long flags;

                spin_lock_irqsave(&priv->ieee->lock, flags);
                mode = priv->assoc_network->mode;
                spin_unlock_irqrestore(&priv->ieee->lock, flags);
        } else {
                mode = priv->ieee->mode;
        }
        IPW_DEBUG_QOS("QoS network/card mode %d\n", mode);
        return mode;
}

/*
* Handle management frame beacon and probe response
*/
static int ipw_qos_handle_probe_response(struct ipw_priv *priv,
                                         int active_network,
                                         struct libipw_network *network)
{
        u32 size = sizeof(struct libipw_qos_parameters);

        if (network->capability & WLAN_CAPABILITY_IBSS)
                network->qos_data.active = network->qos_data.supported;

        if (network->flags & NETWORK_HAS_QOS_MASK) {
                if (active_network &&
                    (network->flags & NETWORK_HAS_QOS_PARAMETERS))
                        network->qos_data.active = network->qos_data.supported;

                if ((network->qos_data.active == 1) && (active_network == 1) &&
                    (network->flags & NETWORK_HAS_QOS_PARAMETERS) &&
                    (network->qos_data.old_param_count !=
                     network->qos_data.param_count)) {
                        network->qos_data.old_param_count =
                            network->qos_data.param_count;
                        schedule_work(&priv->qos_activate);
                        IPW_DEBUG_QOS("QoS parameters change call "
                                      "qos_activate\n");
                }
        } else {
                if ((priv->ieee->mode == IEEE_B) || (network->mode == IEEE_B))
                        memcpy(&network->qos_data.parameters,
                               &def_parameters_CCK, size);
                else
                        memcpy(&network->qos_data.parameters,
                               &def_parameters_OFDM, size);

                if ((network->qos_data.active == 1) && (active_network == 1)) {
                        IPW_DEBUG_QOS("QoS was disabled call qos_activate\n");
                        schedule_work(&priv->qos_activate);
                }

                network->qos_data.active = 0;
                network->qos_data.supported = 0;
        }
        if ((priv->status & STATUS_ASSOCIATED) &&
            (priv->ieee->iw_mode == IW_MODE_ADHOC) && (active_network == 0)) {
                if (!ether_addr_equal(network->bssid, priv->bssid))
                        if (network->capability & WLAN_CAPABILITY_IBSS)
                                if ((network->ssid_len ==
                                     priv->assoc_network->ssid_len) &&
                                    !memcmp(network->ssid,
                                            priv->assoc_network->ssid,
                                            network->ssid_len)) {
                                        schedule_work(&priv->merge_networks);
                                }
        }

        return 0;
}

/*
* This function set up the firmware to support QoS. It sends
* IPW_CMD_QOS_PARAMETERS and IPW_CMD_WME_INFO
*/
static int ipw_qos_activate(struct ipw_priv *priv,
                            struct libipw_qos_data *qos_network_data)
{
        int err;
        struct libipw_qos_parameters qos_parameters[QOS_QOS_SETS];
        struct libipw_qos_parameters *active_one = NULL;
        u32 size = sizeof(struct libipw_qos_parameters);
        u32 burst_duration;
        int i;
        u8 type;

        type = ipw_qos_current_mode(priv);

        active_one = &(qos_parameters[QOS_PARAM_SET_DEF_CCK]);
        memcpy(active_one, priv->qos_data.def_qos_parm_CCK, size);
        active_one = &(qos_parameters[QOS_PARAM_SET_DEF_OFDM]);
        memcpy(active_one, priv->qos_data.def_qos_parm_OFDM, size);

        if (qos_network_data == NULL) {
                if (type == IEEE_B) {
                        IPW_DEBUG_QOS("QoS activate network mode %d\n", type);
                        active_one = &def_parameters_CCK;
                } else
                        active_one = &def_parameters_OFDM;

                memcpy(&qos_parameters[QOS_PARAM_SET_ACTIVE], active_one, size);
                burst_duration = ipw_qos_get_burst_duration(priv);
                for (i = 0; i < QOS_QUEUE_NUM; i++)
                        qos_parameters[QOS_PARAM_SET_ACTIVE].tx_op_limit[i] =
                            cpu_to_le16(burst_duration);
        } else if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
                if (type == IEEE_B) {
                        IPW_DEBUG_QOS("QoS activate IBSS network mode %d\n",
                                      type);
                        if (priv->qos_data.qos_enable == 0)
                                active_one = &def_parameters_CCK;
                        else
                                active_one = priv->qos_data.def_qos_parm_CCK;
                } else {
                        if (priv->qos_data.qos_enable == 0)
                                active_one = &def_parameters_OFDM;
                        else
                                active_one = priv->qos_data.def_qos_parm_OFDM;
                }
                memcpy(&qos_parameters[QOS_PARAM_SET_ACTIVE], active_one, size);
        } else {
                unsigned long flags;
                int active;

                spin_lock_irqsave(&priv->ieee->lock, flags);
                active_one = &(qos_network_data->parameters);
                qos_network_data->old_param_count =
                    qos_network_data->param_count;
                memcpy(&qos_parameters[QOS_PARAM_SET_ACTIVE], active_one, size);
                active = qos_network_data->supported;
                spin_unlock_irqrestore(&priv->ieee->lock, flags);

                if (active == 0) {
                        burst_duration = ipw_qos_get_burst_duration(priv);
                        for (i = 0; i < QOS_QUEUE_NUM; i++)
                                qos_parameters[QOS_PARAM_SET_ACTIVE].
                                    tx_op_limit[i] = cpu_to_le16(burst_duration);
                }
        }

        IPW_DEBUG_QOS("QoS sending IPW_CMD_QOS_PARAMETERS\n");
        err = ipw_send_qos_params_command(priv, &qos_parameters[0]);
        if (err)
                IPW_DEBUG_QOS("QoS IPW_CMD_QOS_PARAMETERS failed\n");

        return err;
}

/*
* send IPW_CMD_WME_INFO to the firmware
*/
static int ipw_qos_set_info_element(struct ipw_priv *priv)
{
        int ret = 0;
        struct libipw_qos_information_element qos_info;

        if (priv == NULL)
                return -1;

        qos_info.elementID = QOS_ELEMENT_ID;
        qos_info.length = sizeof(struct libipw_qos_information_element) - 2;

        qos_info.version = QOS_VERSION_1;
        qos_info.ac_info = 0;

        memcpy(qos_info.qui, qos_oui, QOS_OUI_LEN);
        qos_info.qui_type = QOS_OUI_TYPE;
        qos_info.qui_subtype = QOS_OUI_INFO_SUB_TYPE;

        ret = ipw_send_qos_info_command(priv, &qos_info);
        if (ret != 0) {
                IPW_DEBUG_QOS("QoS error calling ipw_send_qos_info_command\n");
        }
        return ret;
}

/*
* Set the QoS parameter with the association request structure
*/
static int ipw_qos_association(struct ipw_priv *priv,
                               struct libipw_network *network)
{
        int err = 0;
        struct libipw_qos_data *qos_data = NULL;
        struct libipw_qos_data ibss_data = {
                .supported = 1,
                .active = 1,
        };

        switch (priv->ieee->iw_mode) {
        case IW_MODE_ADHOC:
                BUG_ON(!(network->capability & WLAN_CAPABILITY_IBSS));

                qos_data = &ibss_data;
                break;

        case IW_MODE_INFRA:
                qos_data = &network->qos_data;
                break;

        default:
                BUG();
                break;
        }

        err = ipw_qos_activate(priv, qos_data);
        if (err) {
                priv->assoc_request.policy_support &= ~HC_QOS_SUPPORT_ASSOC;
                return err;
        }

        if (priv->qos_data.qos_enable && qos_data->supported) {
                IPW_DEBUG_QOS("QoS will be enabled for this association\n");
                priv->assoc_request.policy_support |= HC_QOS_SUPPORT_ASSOC;
                return ipw_qos_set_info_element(priv);
        }

        return 0;
}

/*
* handling the beaconing responses. if we get different QoS setting
* off the network from the associated setting, adjust the QoS
* setting
*/
static int ipw_qos_association_resp(struct ipw_priv *priv,
                                    struct libipw_network *network)
{
        int ret = 0;
        unsigned long flags;
        u32 size = sizeof(struct libipw_qos_parameters);
        int set_qos_param = 0;

        if ((priv == NULL) || (network == NULL) ||
            (priv->assoc_network == NULL))
                return ret;

        if (!(priv->status & STATUS_ASSOCIATED))
                return ret;

        if ((priv->ieee->iw_mode != IW_MODE_INFRA))
                return ret;

        spin_lock_irqsave(&priv->ieee->lock, flags);
        if (network->flags & NETWORK_HAS_QOS_PARAMETERS) {
                memcpy(&priv->assoc_network->qos_data, &network->qos_data,
                       sizeof(struct libipw_qos_data));
                priv->assoc_network->qos_data.active = 1;
                if ((network->qos_data.old_param_count !=
                     network->qos_data.param_count)) {
                        set_qos_param = 1;
                        network->qos_data.old_param_count =
                            network->qos_data.param_count;
                }

        } else {
                if ((network->mode == IEEE_B) || (priv->ieee->mode == IEEE_B))
                        memcpy(&priv->assoc_network->qos_data.parameters,
                               &def_parameters_CCK, size);
                else
                        memcpy(&priv->assoc_network->qos_data.parameters,
                               &def_parameters_OFDM, size);
                priv->assoc_network->qos_data.active = 0;
                priv->assoc_network->qos_data.supported = 0;
                set_qos_param = 1;
        }

        spin_unlock_irqrestore(&priv->ieee->lock, flags);

        if (set_qos_param == 1)
                schedule_work(&priv->qos_activate);

        return ret;
}

static u32 ipw_qos_get_burst_duration(struct ipw_priv *priv)
{
        u32 ret = 0;

        if ((priv == NULL))
                return 0;

        if (!(priv->ieee->modulation & LIBIPW_OFDM_MODULATION))
                ret = priv->qos_data.burst_duration_CCK;
        else
                ret = priv->qos_data.burst_duration_OFDM;

        return ret;
}

/*
* Initialize the setting of QoS global
*/
static void ipw_qos_init(struct ipw_priv *priv, int enable,
                         int burst_enable, u32 burst_duration_CCK,
                         u32 burst_duration_OFDM)
{
        priv->qos_data.qos_enable = enable;

        if (priv->qos_data.qos_enable) {
                priv->qos_data.def_qos_parm_CCK = &def_qos_parameters_CCK;
                priv->qos_data.def_qos_parm_OFDM = &def_qos_parameters_OFDM;
                IPW_DEBUG_QOS("QoS is enabled\n");
        } else {
                priv->qos_data.def_qos_parm_CCK = &def_parameters_CCK;
                priv->qos_data.def_qos_parm_OFDM = &def_parameters_OFDM;
                IPW_DEBUG_QOS("QoS is not enabled\n");
        }

        priv->qos_data.burst_enable = burst_enable;

        if (burst_enable) {
                priv->qos_data.burst_duration_CCK = burst_duration_CCK;
                priv->qos_data.burst_duration_OFDM = burst_duration_OFDM;
        } else {
                priv->qos_data.burst_duration_CCK = 0;
                priv->qos_data.burst_duration_OFDM = 0;
        }
}

/*
* map the packet priority to the right TX Queue
*/
static int ipw_get_tx_queue_number(struct ipw_priv *priv, u16 priority)
{
        if (priority > 7 || !priv->qos_data.qos_enable)
                priority = 0;

        return from_priority_to_tx_queue[priority] - 1;
}

static int ipw_is_qos_active(struct net_device *dev,
                             struct sk_buff *skb)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct libipw_qos_data *qos_data = NULL;
        int active, supported;
        u8 *daddr = skb->data + ETH_ALEN;
        int unicast = !is_multicast_ether_addr(daddr);

        if (!(priv->status & STATUS_ASSOCIATED))
                return 0;

        qos_data = &priv->assoc_network->qos_data;

        if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
                if (unicast == 0)
                        qos_data->active = 0;
                else
                        qos_data->active = qos_data->supported;
        }
        active = qos_data->active;
        supported = qos_data->supported;
        IPW_DEBUG_QOS("QoS  %d network is QoS active %d  supported %d  "
                      "unicast %d\n",
                      priv->qos_data.qos_enable, active, supported, unicast);
        if (active && priv->qos_data.qos_enable)
                return 1;

        return 0;

}
/*
* add QoS parameter to the TX command
*/
static int ipw_qos_set_tx_queue_command(struct ipw_priv *priv,
                                        u16 priority,
                                        struct tfd_data *tfd)
{
        int tx_queue_id = 0;


        tx_queue_id = from_priority_to_tx_queue[priority] - 1;
        tfd->tx_flags_ext |= DCT_FLAG_EXT_QOS_ENABLED;

        if (priv->qos_data.qos_no_ack_mask & (1UL << tx_queue_id)) {
                tfd->tx_flags &= ~DCT_FLAG_ACK_REQD;
                tfd->tfd.tfd_26.mchdr.qos_ctrl |= cpu_to_le16(CTRL_QOS_NO_ACK);
        }
        return 0;
}

/*
* background support to run QoS activate functionality
*/
static void ipw_bg_qos_activate(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, qos_activate);

        mutex_lock(&priv->mutex);

        if (priv->status & STATUS_ASSOCIATED)
                ipw_qos_activate(priv, &(priv->assoc_network->qos_data));

        mutex_unlock(&priv->mutex);
}

static int ipw_handle_probe_response(struct net_device *dev,
                                     struct libipw_probe_response *resp,
                                     struct libipw_network *network)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int active_network = ((priv->status & STATUS_ASSOCIATED) &&
                              (network == priv->assoc_network));

        ipw_qos_handle_probe_response(priv, active_network, network);

        return 0;
}

static int ipw_handle_beacon(struct net_device *dev,
                             struct libipw_beacon *resp,
                             struct libipw_network *network)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int active_network = ((priv->status & STATUS_ASSOCIATED) &&
                              (network == priv->assoc_network));

        ipw_qos_handle_probe_response(priv, active_network, network);

        return 0;
}

static int ipw_handle_assoc_response(struct net_device *dev,
                                     struct libipw_assoc_response *resp,
                                     struct libipw_network *network)
{
        struct ipw_priv *priv = libipw_priv(dev);
        ipw_qos_association_resp(priv, network);
        return 0;
}

static int ipw_send_qos_params_command(struct ipw_priv *priv, struct libipw_qos_parameters
                                       *qos_param)
{
        return ipw_send_cmd_pdu(priv, IPW_CMD_QOS_PARAMETERS,
                                sizeof(*qos_param) * 3, qos_param);
}

static int ipw_send_qos_info_command(struct ipw_priv *priv, struct libipw_qos_information_element
                                     *qos_param)
{
        return ipw_send_cmd_pdu(priv, IPW_CMD_WME_INFO, sizeof(*qos_param),
                                qos_param);
}

#endif                          /* CONFIG_IPW2200_QOS */

static int ipw_associate_network(struct ipw_priv *priv,
                                 struct libipw_network *network,
                                 struct ipw_supported_rates *rates, int roaming)
{
        int err;

        if (priv->config & CFG_FIXED_RATE)
                ipw_set_fixed_rate(priv, network->mode);

        if (!(priv->config & CFG_STATIC_ESSID)) {
                priv->essid_len = min(network->ssid_len,
                                      (u8) IW_ESSID_MAX_SIZE);
                memcpy(priv->essid, network->ssid, priv->essid_len);
        }

        network->last_associate = jiffies;

        memset(&priv->assoc_request, 0, sizeof(priv->assoc_request));
        priv->assoc_request.channel = network->channel;
        priv->assoc_request.auth_key = 0;

        if ((priv->capability & CAP_PRIVACY_ON) &&
            (priv->ieee->sec.auth_mode == WLAN_AUTH_SHARED_KEY)) {
                priv->assoc_request.auth_type = AUTH_SHARED_KEY;
                priv->assoc_request.auth_key = priv->ieee->sec.active_key;

                if (priv->ieee->sec.level == SEC_LEVEL_1)
                        ipw_send_wep_keys(priv, DCW_WEP_KEY_SEC_TYPE_WEP);

        } else if ((priv->capability & CAP_PRIVACY_ON) &&
                   (priv->ieee->sec.auth_mode == WLAN_AUTH_LEAP))
                priv->assoc_request.auth_type = AUTH_LEAP;
        else
                priv->assoc_request.auth_type = AUTH_OPEN;

        if (priv->ieee->wpa_ie_len) {
                priv->assoc_request.policy_support = cpu_to_le16(0x02); /* RSN active */
                ipw_set_rsn_capa(priv, priv->ieee->wpa_ie,
                                 priv->ieee->wpa_ie_len);
        }

        /*
         * It is valid for our ieee device to support multiple modes, but
         * when it comes to associating to a given network we have to choose
         * just one mode.
         */
        if (network->mode & priv->ieee->mode & IEEE_A)
                priv->assoc_request.ieee_mode = IPW_A_MODE;
        else if (network->mode & priv->ieee->mode & IEEE_G)
                priv->assoc_request.ieee_mode = IPW_G_MODE;
        else if (network->mode & priv->ieee->mode & IEEE_B)
                priv->assoc_request.ieee_mode = IPW_B_MODE;

        priv->assoc_request.capability = cpu_to_le16(network->capability);
        if ((network->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
            && !(priv->config & CFG_PREAMBLE_LONG)) {
                priv->assoc_request.preamble_length = DCT_FLAG_SHORT_PREAMBLE;
        } else {
                priv->assoc_request.preamble_length = DCT_FLAG_LONG_PREAMBLE;

                /* Clear the short preamble if we won't be supporting it */
                priv->assoc_request.capability &=
                    ~cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
        }

        /* Clear capability bits that aren't used in Ad Hoc */
        if (priv->ieee->iw_mode == IW_MODE_ADHOC)
                priv->assoc_request.capability &=
                    ~cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);

        IPW_DEBUG_ASSOC("%ssociation attempt: '%*pE', channel %d, 802.11%c [%d], %s[:%s], enc=%s%s%s%c%c\n",
                        roaming ? "Rea" : "A",
                        priv->essid_len, priv->essid,
                        network->channel,
                        ipw_modes[priv->assoc_request.ieee_mode],
                        rates->num_rates,
                        (priv->assoc_request.preamble_length ==
                         DCT_FLAG_LONG_PREAMBLE) ? "long" : "short",
                        network->capability &
                        WLAN_CAPABILITY_SHORT_PREAMBLE ? "short" : "long",
                        priv->capability & CAP_PRIVACY_ON ? "on " : "off",
                        priv->capability & CAP_PRIVACY_ON ?
                        (priv->capability & CAP_SHARED_KEY ? "(shared)" :
                         "(open)") : "",
                        priv->capability & CAP_PRIVACY_ON ? " key=" : "",
                        priv->capability & CAP_PRIVACY_ON ?
                        '1' + priv->ieee->sec.active_key : '.',
                        priv->capability & CAP_PRIVACY_ON ? '.' : ' ');

        priv->assoc_request.beacon_interval = cpu_to_le16(network->beacon_interval);
        if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
            (network->time_stamp[0] == 0) && (network->time_stamp[1] == 0)) {
                priv->assoc_request.assoc_type = HC_IBSS_START;
                priv->assoc_request.assoc_tsf_msw = 0;
                priv->assoc_request.assoc_tsf_lsw = 0;
        } else {
                if (unlikely(roaming))
                        priv->assoc_request.assoc_type = HC_REASSOCIATE;
                else
                        priv->assoc_request.assoc_type = HC_ASSOCIATE;
                priv->assoc_request.assoc_tsf_msw = cpu_to_le32(network->time_stamp[1]);
                priv->assoc_request.assoc_tsf_lsw = cpu_to_le32(network->time_stamp[0]);
        }

        memcpy(priv->assoc_request.bssid, network->bssid, ETH_ALEN);

        if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
                eth_broadcast_addr(priv->assoc_request.dest);
                priv->assoc_request.atim_window = cpu_to_le16(network->atim_window);
        } else {
                memcpy(priv->assoc_request.dest, network->bssid, ETH_ALEN);
                priv->assoc_request.atim_window = 0;
        }

        priv->assoc_request.listen_interval = cpu_to_le16(network->listen_interval);

        err = ipw_send_ssid(priv, priv->essid, priv->essid_len);
        if (err) {
                IPW_DEBUG_HC("Attempt to send SSID command failed.\n");
                return err;
        }

        rates->ieee_mode = priv->assoc_request.ieee_mode;
        rates->purpose = IPW_RATE_CONNECT;
        ipw_send_supported_rates(priv, rates);

        if (priv->assoc_request.ieee_mode == IPW_G_MODE)
                priv->sys_config.dot11g_auto_detection = 1;
        else
                priv->sys_config.dot11g_auto_detection = 0;

        if (priv->ieee->iw_mode == IW_MODE_ADHOC)
                priv->sys_config.answer_broadcast_ssid_probe = 1;
        else
                priv->sys_config.answer_broadcast_ssid_probe = 0;

        err = ipw_send_system_config(priv);
        if (err) {
                IPW_DEBUG_HC("Attempt to send sys config command failed.\n");
                return err;
        }

        IPW_DEBUG_ASSOC("Association sensitivity: %d\n", network->stats.rssi);
        err = ipw_set_sensitivity(priv, network->stats.rssi + IPW_RSSI_TO_DBM);
        if (err) {
                IPW_DEBUG_HC("Attempt to send associate command failed.\n");
                return err;
        }

        /*
         * If preemption is enabled, it is possible for the association
         * to complete before we return from ipw_send_associate.  Therefore
         * we have to be sure and update our priviate data first.
         */
        priv->channel = network->channel;
        memcpy(priv->bssid, network->bssid, ETH_ALEN);
        priv->status |= STATUS_ASSOCIATING;
        priv->status &= ~STATUS_SECURITY_UPDATED;

        priv->assoc_network = network;

#ifdef CONFIG_IPW2200_QOS
        ipw_qos_association(priv, network);
#endif

        err = ipw_send_associate(priv, &priv->assoc_request);
        if (err) {
                IPW_DEBUG_HC("Attempt to send associate command failed.\n");
                return err;
        }

        IPW_DEBUG(IPW_DL_STATE, "associating: '%*pE' %pM\n",
                  priv->essid_len, priv->essid, priv->bssid);

        return 0;
}

static void ipw_roam(void *data)
{
        struct ipw_priv *priv = data;
        struct libipw_network *network = NULL;
        struct ipw_network_match match = {
                .network = priv->assoc_network
        };

        /* The roaming process is as follows:
         *
         * 1.  Missed beacon threshold triggers the roaming process by
         *     setting the status ROAM bit and requesting a scan.
         * 2.  When the scan completes, it schedules the ROAM work
         * 3.  The ROAM work looks at all of the known networks for one that
         *     is a better network than the currently associated.  If none
         *     found, the ROAM process is over (ROAM bit cleared)
         * 4.  If a better network is found, a disassociation request is
         *     sent.
         * 5.  When the disassociation completes, the roam work is again
         *     scheduled.  The second time through, the driver is no longer
         *     associated, and the newly selected network is sent an
         *     association request.
         * 6.  At this point ,the roaming process is complete and the ROAM
         *     status bit is cleared.
         */

        /* If we are no longer associated, and the roaming bit is no longer
         * set, then we are not actively roaming, so just return */
        if (!(priv->status & (STATUS_ASSOCIATED | STATUS_ROAMING)))
                return;

        if (priv->status & STATUS_ASSOCIATED) {
                /* First pass through ROAM process -- look for a better
                 * network */
                unsigned long flags;
                u8 rssi = priv->assoc_network->stats.rssi;
                priv->assoc_network->stats.rssi = -128;
                spin_lock_irqsave(&priv->ieee->lock, flags);
                list_for_each_entry(network, &priv->ieee->network_list, list) {
                        if (network != priv->assoc_network)
                                ipw_best_network(priv, &match, network, 1);
                }
                spin_unlock_irqrestore(&priv->ieee->lock, flags);
                priv->assoc_network->stats.rssi = rssi;

                if (match.network == priv->assoc_network) {
                        IPW_DEBUG_ASSOC("No better APs in this network to "
                                        "roam to.\n");
                        priv->status &= ~STATUS_ROAMING;
                        ipw_debug_config(priv);
                        return;
                }

                ipw_send_disassociate(priv, 1);
                priv->assoc_network = match.network;

                return;
        }

        /* Second pass through ROAM process -- request association */
        ipw_compatible_rates(priv, priv->assoc_network, &match.rates);
        ipw_associate_network(priv, priv->assoc_network, &match.rates, 1);
        priv->status &= ~STATUS_ROAMING;
}

static void ipw_bg_roam(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, roam);
        mutex_lock(&priv->mutex);
        ipw_roam(priv);
        mutex_unlock(&priv->mutex);
}

static int ipw_associate(void *data)
{
        struct ipw_priv *priv = data;

        struct libipw_network *network = NULL;
        struct ipw_network_match match = {
                .network = NULL
        };
        struct ipw_supported_rates *rates;
        struct list_head *element;
        unsigned long flags;

        if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
                IPW_DEBUG_ASSOC("Not attempting association (monitor mode)\n");
                return 0;
        }

        if (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
                IPW_DEBUG_ASSOC("Not attempting association (already in "
                                "progress)\n");
                return 0;
        }

        if (priv->status & STATUS_DISASSOCIATING) {
                IPW_DEBUG_ASSOC("Not attempting association (in "
                                "disassociating)\n ");
                schedule_work(&priv->associate);
                return 0;
        }

        if (!ipw_is_init(priv) || (priv->status & STATUS_SCANNING)) {
                IPW_DEBUG_ASSOC("Not attempting association (scanning or not "
                                "initialized)\n");
                return 0;
        }

        if (!(priv->config & CFG_ASSOCIATE) &&
            !(priv->config & (CFG_STATIC_ESSID | CFG_STATIC_BSSID))) {
                IPW_DEBUG_ASSOC("Not attempting association (associate=0)\n");
                return 0;
        }

        /* Protect our use of the network_list */
        spin_lock_irqsave(&priv->ieee->lock, flags);
        list_for_each_entry(network, &priv->ieee->network_list, list)
            ipw_best_network(priv, &match, network, 0);

        network = match.network;
        rates = &match.rates;

        if (network == NULL &&
            priv->ieee->iw_mode == IW_MODE_ADHOC &&
            priv->config & CFG_ADHOC_CREATE &&
            priv->config & CFG_STATIC_ESSID &&
            priv->config & CFG_STATIC_CHANNEL) {
                /* Use oldest network if the free list is empty */
                if (list_empty(&priv->ieee->network_free_list)) {
                        struct libipw_network *oldest = NULL;
                        struct libipw_network *target;

                        list_for_each_entry(target, &priv->ieee->network_list, list) {
                                if ((oldest == NULL) ||
                                    (target->last_scanned < oldest->last_scanned))
                                        oldest = target;
                        }

                        /* If there are no more slots, expire the oldest */
                        list_del(&oldest->list);
                        target = oldest;
                        IPW_DEBUG_ASSOC("Expired '%*pE' (%pM) from network list.\n",
                                        target->ssid_len, target->ssid,
                                        target->bssid);
                        list_add_tail(&target->list,
                                      &priv->ieee->network_free_list);
                }

                element = priv->ieee->network_free_list.next;
                network = list_entry(element, struct libipw_network, list);
                ipw_adhoc_create(priv, network);
                rates = &priv->rates;
                list_del(element);
                list_add_tail(&network->list, &priv->ieee->network_list);
        }
        spin_unlock_irqrestore(&priv->ieee->lock, flags);

        /* If we reached the end of the list, then we don't have any valid
         * matching APs */
        if (!network) {
                ipw_debug_config(priv);

                if (!(priv->status & STATUS_SCANNING)) {
                        if (!(priv->config & CFG_SPEED_SCAN))
                                schedule_delayed_work(&priv->request_scan,
                                                      SCAN_INTERVAL);
                        else
                                schedule_delayed_work(&priv->request_scan, 0);
                }

                return 0;
        }

        ipw_associate_network(priv, network, rates, 0);

        return 1;
}

static void ipw_bg_associate(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, associate);
        mutex_lock(&priv->mutex);
        ipw_associate(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_rebuild_decrypted_skb(struct ipw_priv *priv,
                                      struct sk_buff *skb)
{
        struct ieee80211_hdr *hdr;
        u16 fc;

        hdr = (struct ieee80211_hdr *)skb->data;
        fc = le16_to_cpu(hdr->frame_control);
        if (!(fc & IEEE80211_FCTL_PROTECTED))
                return;

        fc &= ~IEEE80211_FCTL_PROTECTED;
        hdr->frame_control = cpu_to_le16(fc);
        switch (priv->ieee->sec.level) {
        case SEC_LEVEL_3:
                /* Remove CCMP HDR */
                memmove(skb->data + LIBIPW_3ADDR_LEN,
                        skb->data + LIBIPW_3ADDR_LEN + 8,
                        skb->len - LIBIPW_3ADDR_LEN - 8);
                skb_trim(skb, skb->len - 16);   /* CCMP_HDR_LEN + CCMP_MIC_LEN */
                break;
        case SEC_LEVEL_2:
                break;
        case SEC_LEVEL_1:
                /* Remove IV */
                memmove(skb->data + LIBIPW_3ADDR_LEN,
                        skb->data + LIBIPW_3ADDR_LEN + 4,
                        skb->len - LIBIPW_3ADDR_LEN - 4);
                skb_trim(skb, skb->len - 8);    /* IV + ICV */
                break;
        case SEC_LEVEL_0:
                break;
        default:
                printk(KERN_ERR "Unknown security level %d\n",
                       priv->ieee->sec.level);
                break;
        }
}

static void ipw_handle_data_packet(struct ipw_priv *priv,
                                   struct ipw_rx_mem_buffer *rxb,
                                   struct libipw_rx_stats *stats)
{
        struct net_device *dev = priv->net_dev;
        struct libipw_hdr_4addr *hdr;
        struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;

        /* We received data from the HW, so stop the watchdog */
        netif_trans_update(dev);

        /* We only process data packets if the
         * interface is open */
        if (unlikely((le16_to_cpu(pkt->u.frame.length) + IPW_RX_FRAME_SIZE) >
                     skb_tailroom(rxb->skb))) {
                dev->stats.rx_errors++;
                priv->wstats.discard.misc++;
                IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
                return;
        } else if (unlikely(!netif_running(priv->net_dev))) {
                dev->stats.rx_dropped++;
                priv->wstats.discard.misc++;
                IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
                return;
        }

        /* Advance skb->data to the start of the actual payload */
        skb_reserve(rxb->skb, offsetof(struct ipw_rx_packet, u.frame.data));

        /* Set the size of the skb to the size of the frame */
        skb_put(rxb->skb, le16_to_cpu(pkt->u.frame.length));

        IPW_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);

        /* HW decrypt will not clear the WEP bit, MIC, PN, etc. */
        hdr = (struct libipw_hdr_4addr *)rxb->skb->data;
        if (priv->ieee->iw_mode != IW_MODE_MONITOR &&
            (is_multicast_ether_addr(hdr->addr1) ?
             !priv->ieee->host_mc_decrypt : !priv->ieee->host_decrypt))
                ipw_rebuild_decrypted_skb(priv, rxb->skb);

        if (!libipw_rx(priv->ieee, rxb->skb, stats))
                dev->stats.rx_errors++;
        else {                  /* libipw_rx succeeded, so it now owns the SKB */
                rxb->skb = NULL;
                __ipw_led_activity_on(priv);
        }
}

#ifdef CONFIG_IPW2200_RADIOTAP
static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
                                           struct ipw_rx_mem_buffer *rxb,
                                           struct libipw_rx_stats *stats)
{
        struct net_device *dev = priv->net_dev;
        struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;
        struct ipw_rx_frame *frame = &pkt->u.frame;

        /* initial pull of some data */
        u16 received_channel = frame->received_channel;
        u8 antennaAndPhy = frame->antennaAndPhy;
        s8 antsignal = frame->rssi_dbm - IPW_RSSI_TO_DBM;       /* call it signed anyhow */
        u16 pktrate = frame->rate;

        /* Magic struct that slots into the radiotap header -- no reason
         * to build this manually element by element, we can write it much
         * more efficiently than we can parse it. ORDER MATTERS HERE */
        struct ipw_rt_hdr *ipw_rt;

        unsigned short len = le16_to_cpu(pkt->u.frame.length);

        /* We received data from the HW, so stop the watchdog */
        netif_trans_update(dev);

        /* We only process data packets if the
         * interface is open */
        if (unlikely((le16_to_cpu(pkt->u.frame.length) + IPW_RX_FRAME_SIZE) >
                     skb_tailroom(rxb->skb))) {
                dev->stats.rx_errors++;
                priv->wstats.discard.misc++;
                IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
                return;
        } else if (unlikely(!netif_running(priv->net_dev))) {
                dev->stats.rx_dropped++;
                priv->wstats.discard.misc++;
                IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
                return;
        }

        /* Libpcap 0.9.3+ can handle variable length radiotap, so we'll use
         * that now */
        if (len > IPW_RX_BUF_SIZE - sizeof(struct ipw_rt_hdr)) {
                /* FIXME: Should alloc bigger skb instead */
                dev->stats.rx_dropped++;
                priv->wstats.discard.misc++;
                IPW_DEBUG_DROP("Dropping too large packet in monitor\n");
                return;
        }

        /* copy the frame itself */
        memmove(rxb->skb->data + sizeof(struct ipw_rt_hdr),
                rxb->skb->data + IPW_RX_FRAME_SIZE, len);

        ipw_rt = (struct ipw_rt_hdr *)rxb->skb->data;

        ipw_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
        ipw_rt->rt_hdr.it_pad = 0;      /* always good to zero */
        ipw_rt->rt_hdr.it_len = cpu_to_le16(sizeof(struct ipw_rt_hdr)); /* total header+data */

        /* Big bitfield of all the fields we provide in radiotap */
        ipw_rt->rt_hdr.it_present = cpu_to_le32(
             (1 << IEEE80211_RADIOTAP_TSFT) |
             (1 << IEEE80211_RADIOTAP_FLAGS) |
             (1 << IEEE80211_RADIOTAP_RATE) |
             (1 << IEEE80211_RADIOTAP_CHANNEL) |
             (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
             (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
             (1 << IEEE80211_RADIOTAP_ANTENNA));

        /* Zero the flags, we'll add to them as we go */
        ipw_rt->rt_flags = 0;
        ipw_rt->rt_tsf = (u64)(frame->parent_tsf[3] << 24 |
                               frame->parent_tsf[2] << 16 |
                               frame->parent_tsf[1] << 8  |
                               frame->parent_tsf[0]);

        /* Convert signal to DBM */
        ipw_rt->rt_dbmsignal = antsignal;
        ipw_rt->rt_dbmnoise = (s8) le16_to_cpu(frame->noise);

        /* Convert the channel data and set the flags */
        ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(received_channel));
        if (received_channel > 14) {    /* 802.11a */
                ipw_rt->rt_chbitmask =
                    cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
        } else if (antennaAndPhy & 32) {        /* 802.11b */
                ipw_rt->rt_chbitmask =
                    cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
        } else {                /* 802.11g */
                ipw_rt->rt_chbitmask =
                    cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ);
        }

        /* set the rate in multiples of 500k/s */
        switch (pktrate) {
        case IPW_TX_RATE_1MB:
                ipw_rt->rt_rate = 2;
                break;
        case IPW_TX_RATE_2MB:
                ipw_rt->rt_rate = 4;
                break;
        case IPW_TX_RATE_5MB:
                ipw_rt->rt_rate = 10;
                break;
        case IPW_TX_RATE_6MB:
                ipw_rt->rt_rate = 12;
                break;
        case IPW_TX_RATE_9MB:
                ipw_rt->rt_rate = 18;
                break;
        case IPW_TX_RATE_11MB:
                ipw_rt->rt_rate = 22;
                break;
        case IPW_TX_RATE_12MB:
                ipw_rt->rt_rate = 24;
                break;
        case IPW_TX_RATE_18MB:
                ipw_rt->rt_rate = 36;
                break;
        case IPW_TX_RATE_24MB:
                ipw_rt->rt_rate = 48;
                break;
        case IPW_TX_RATE_36MB:
                ipw_rt->rt_rate = 72;
                break;
        case IPW_TX_RATE_48MB:
                ipw_rt->rt_rate = 96;
                break;
        case IPW_TX_RATE_54MB:
                ipw_rt->rt_rate = 108;
                break;
        default:
                ipw_rt->rt_rate = 0;
                break;
        }

        /* antenna number */
        ipw_rt->rt_antenna = (antennaAndPhy & 3);       /* Is this right? */

        /* set the preamble flag if we have it */
        if ((antennaAndPhy & 64))
                ipw_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

        /* Set the size of the skb to the size of the frame */
        skb_put(rxb->skb, len + sizeof(struct ipw_rt_hdr));

        IPW_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);

        if (!libipw_rx(priv->ieee, rxb->skb, stats))
                dev->stats.rx_errors++;
        else {                  /* libipw_rx succeeded, so it now owns the SKB */
                rxb->skb = NULL;
                /* no LED during capture */
        }
}
#endif

#ifdef CONFIG_IPW2200_PROMISCUOUS
#define libipw_is_probe_response(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && \
    (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP )

#define libipw_is_management(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)

#define libipw_is_control(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)

#define libipw_is_data(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)

#define libipw_is_assoc_request(fc) \
   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ)

#define libipw_is_reassoc_request(fc) \
   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)

static void ipw_handle_promiscuous_rx(struct ipw_priv *priv,
                                      struct ipw_rx_mem_buffer *rxb,
                                      struct libipw_rx_stats *stats)
{
        struct net_device *dev = priv->prom_net_dev;
        struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;
        struct ipw_rx_frame *frame = &pkt->u.frame;
        struct ipw_rt_hdr *ipw_rt;

        /* First cache any information we need before we overwrite
         * the information provided in the skb from the hardware */
        struct ieee80211_hdr *hdr;
        u16 channel = frame->received_channel;
        u8 phy_flags = frame->antennaAndPhy;
        s8 signal = frame->rssi_dbm - IPW_RSSI_TO_DBM;
        s8 noise = (s8) le16_to_cpu(frame->noise);
        u8 rate = frame->rate;
        unsigned short len = le16_to_cpu(pkt->u.frame.length);
        struct sk_buff *skb;
        int hdr_only = 0;
        u16 filter = priv->prom_priv->filter;

        /* If the filter is set to not include Rx frames then return */
        if (filter & IPW_PROM_NO_RX)
                return;

        /* We received data from the HW, so stop the watchdog */
        netif_trans_update(dev);

        if (unlikely((len + IPW_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
                dev->stats.rx_errors++;
                IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
                return;
        }

        /* We only process data packets if the interface is open */
        if (unlikely(!netif_running(dev))) {
                dev->stats.rx_dropped++;
                IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
                return;
        }

        /* Libpcap 0.9.3+ can handle variable length radiotap, so we'll use
         * that now */
        if (len > IPW_RX_BUF_SIZE - sizeof(struct ipw_rt_hdr)) {
                /* FIXME: Should alloc bigger skb instead */
                dev->stats.rx_dropped++;
                IPW_DEBUG_DROP("Dropping too large packet in monitor\n");
                return;
        }

        hdr = (void *)rxb->skb->data + IPW_RX_FRAME_SIZE;
        if (libipw_is_management(le16_to_cpu(hdr->frame_control))) {
                if (filter & IPW_PROM_NO_MGMT)
                        return;
                if (filter & IPW_PROM_MGMT_HEADER_ONLY)
                        hdr_only = 1;
        } else if (libipw_is_control(le16_to_cpu(hdr->frame_control))) {
                if (filter & IPW_PROM_NO_CTL)
                        return;
                if (filter & IPW_PROM_CTL_HEADER_ONLY)
                        hdr_only = 1;
        } else if (libipw_is_data(le16_to_cpu(hdr->frame_control))) {
                if (filter & IPW_PROM_NO_DATA)
                        return;
                if (filter & IPW_PROM_DATA_HEADER_ONLY)
                        hdr_only = 1;
        }

        /* Copy the SKB since this is for the promiscuous side */
        skb = skb_copy(rxb->skb, GFP_ATOMIC);
        if (skb == NULL) {
                IPW_ERROR("skb_clone failed for promiscuous copy.\n");
                return;
        }

        /* copy the frame data to write after where the radiotap header goes */
        ipw_rt = (void *)skb->data;

        if (hdr_only)
                len = libipw_get_hdrlen(le16_to_cpu(hdr->frame_control));

        memcpy(ipw_rt->payload, hdr, len);

        ipw_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
        ipw_rt->rt_hdr.it_pad = 0;      /* always good to zero */
        ipw_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*ipw_rt));   /* total header+data */

        /* Set the size of the skb to the size of the frame */
        skb_put(skb, sizeof(*ipw_rt) + len);

        /* Big bitfield of all the fields we provide in radiotap */
        ipw_rt->rt_hdr.it_present = cpu_to_le32(
             (1 << IEEE80211_RADIOTAP_TSFT) |
             (1 << IEEE80211_RADIOTAP_FLAGS) |
             (1 << IEEE80211_RADIOTAP_RATE) |
             (1 << IEEE80211_RADIOTAP_CHANNEL) |
             (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
             (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
             (1 << IEEE80211_RADIOTAP_ANTENNA));

        /* Zero the flags, we'll add to them as we go */
        ipw_rt->rt_flags = 0;
        ipw_rt->rt_tsf = (u64)(frame->parent_tsf[3] << 24 |
                               frame->parent_tsf[2] << 16 |
                               frame->parent_tsf[1] << 8  |
                               frame->parent_tsf[0]);

        /* Convert to DBM */
        ipw_rt->rt_dbmsignal = signal;
        ipw_rt->rt_dbmnoise = noise;

        /* Convert the channel data and set the flags */
        ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(channel));
        if (channel > 14) {     /* 802.11a */
                ipw_rt->rt_chbitmask =
                    cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
        } else if (phy_flags & (1 << 5)) {      /* 802.11b */
                ipw_rt->rt_chbitmask =
                    cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
        } else {                /* 802.11g */
                ipw_rt->rt_chbitmask =
                    cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ);
        }

        /* set the rate in multiples of 500k/s */
        switch (rate) {
        case IPW_TX_RATE_1MB:
                ipw_rt->rt_rate = 2;
                break;
        case IPW_TX_RATE_2MB:
                ipw_rt->rt_rate = 4;
                break;
        case IPW_TX_RATE_5MB:
                ipw_rt->rt_rate = 10;
                break;
        case IPW_TX_RATE_6MB:
                ipw_rt->rt_rate = 12;
                break;
        case IPW_TX_RATE_9MB:
                ipw_rt->rt_rate = 18;
                break;
        case IPW_TX_RATE_11MB:
                ipw_rt->rt_rate = 22;
                break;
        case IPW_TX_RATE_12MB:
                ipw_rt->rt_rate = 24;
                break;
        case IPW_TX_RATE_18MB:
                ipw_rt->rt_rate = 36;
                break;
        case IPW_TX_RATE_24MB:
                ipw_rt->rt_rate = 48;
                break;
        case IPW_TX_RATE_36MB:
                ipw_rt->rt_rate = 72;
                break;
        case IPW_TX_RATE_48MB:
                ipw_rt->rt_rate = 96;
                break;
        case IPW_TX_RATE_54MB:
                ipw_rt->rt_rate = 108;
                break;
        default:
                ipw_rt->rt_rate = 0;
                break;
        }

        /* antenna number */
        ipw_rt->rt_antenna = (phy_flags & 3);

        /* set the preamble flag if we have it */
        if (phy_flags & (1 << 6))
                ipw_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

        IPW_DEBUG_RX("Rx packet of %d bytes.\n", skb->len);

        if (!libipw_rx(priv->prom_priv->ieee, skb, stats)) {
                dev->stats.rx_errors++;
                dev_kfree_skb_any(skb);
        }
}
#endif

static int is_network_packet(struct ipw_priv *priv,
                                    struct libipw_hdr_4addr *header)
{
        /* Filter incoming packets to determine if they are targeted toward
         * this network, discarding packets coming from ourselves */
        switch (priv->ieee->iw_mode) {
        case IW_MODE_ADHOC:     /* Header: Dest. | Source    | BSSID */
                /* packets from our adapter are dropped (echo) */
                if (ether_addr_equal(header->addr2, priv->net_dev->dev_addr))
                        return 0;

                /* {broad,multi}cast packets to our BSSID go through */
                if (is_multicast_ether_addr(header->addr1))
                        return ether_addr_equal(header->addr3, priv->bssid);

                /* packets to our adapter go through */
                return ether_addr_equal(header->addr1,
                                        priv->net_dev->dev_addr);

        case IW_MODE_INFRA:     /* Header: Dest. | BSSID | Source */
                /* packets from our adapter are dropped (echo) */
                if (ether_addr_equal(header->addr3, priv->net_dev->dev_addr))
                        return 0;

                /* {broad,multi}cast packets to our BSS go through */
                if (is_multicast_ether_addr(header->addr1))
                        return ether_addr_equal(header->addr2, priv->bssid);

                /* packets to our adapter go through */
                return ether_addr_equal(header->addr1,
                                        priv->net_dev->dev_addr);
        }

        return 1;
}

#define IPW_PACKET_RETRY_TIME HZ

static  int is_duplicate_packet(struct ipw_priv *priv,
                                      struct libipw_hdr_4addr *header)
{
        u16 sc = le16_to_cpu(header->seq_ctl);
        u16 seq = WLAN_GET_SEQ_SEQ(sc);
        u16 frag = WLAN_GET_SEQ_FRAG(sc);
        u16 *last_seq, *last_frag;
        unsigned long *last_time;

        switch (priv->ieee->iw_mode) {
        case IW_MODE_ADHOC:
                {
                        struct list_head *p;
                        struct ipw_ibss_seq *entry = NULL;
                        u8 *mac = header->addr2;
                        int index = mac[5] % IPW_IBSS_MAC_HASH_SIZE;

                        list_for_each(p, &priv->ibss_mac_hash[index]) {
                                entry =
                                    list_entry(p, struct ipw_ibss_seq, list);
                                if (ether_addr_equal(entry->mac, mac))
                                        break;
                        }
                        if (p == &priv->ibss_mac_hash[index]) {
                                entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
                                if (!entry) {
                                        IPW_ERROR
                                            ("Cannot malloc new mac entry\n");
                                        return 0;
                                }
                                memcpy(entry->mac, mac, ETH_ALEN);
                                entry->seq_num = seq;
                                entry->frag_num = frag;
                                entry->packet_time = jiffies;
                                list_add(&entry->list,
                                         &priv->ibss_mac_hash[index]);
                                return 0;
                        }
                        last_seq = &entry->seq_num;
                        last_frag = &entry->frag_num;
                        last_time = &entry->packet_time;
                        break;
                }
        case IW_MODE_INFRA:
                last_seq = &priv->last_seq_num;
                last_frag = &priv->last_frag_num;
                last_time = &priv->last_packet_time;
                break;
        default:
                return 0;
        }
        if ((*last_seq == seq) &&
            time_after(*last_time + IPW_PACKET_RETRY_TIME, jiffies)) {
                if (*last_frag == frag)
                        goto drop;
                if (*last_frag + 1 != frag)
                        /* out-of-order fragment */
                        goto drop;
        } else
                *last_seq = seq;

        *last_frag = frag;
        *last_time = jiffies;
        return 0;

      drop:
        /* Comment this line now since we observed the card receives
         * duplicate packets but the FCTL_RETRY bit is not set in the
         * IBSS mode with fragmentation enabled.
         BUG_ON(!(le16_to_cpu(header->frame_control) & IEEE80211_FCTL_RETRY)); */
        return 1;
}

static void ipw_handle_mgmt_packet(struct ipw_priv *priv,
                                   struct ipw_rx_mem_buffer *rxb,
                                   struct libipw_rx_stats *stats)
{
        struct sk_buff *skb = rxb->skb;
        struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)skb->data;
        struct libipw_hdr_4addr *header = (struct libipw_hdr_4addr *)
            (skb->data + IPW_RX_FRAME_SIZE);

        libipw_rx_mgt(priv->ieee, header, stats);

        if (priv->ieee->iw_mode == IW_MODE_ADHOC &&
            ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) ==
              IEEE80211_STYPE_PROBE_RESP) ||
             (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) ==
              IEEE80211_STYPE_BEACON))) {
                if (ether_addr_equal(header->addr3, priv->bssid))
                        ipw_add_station(priv, header->addr2);
        }

        if (priv->config & CFG_NET_STATS) {
                IPW_DEBUG_HC("sending stat packet\n");

                /* Set the size of the skb to the size of the full
                 * ipw header and 802.11 frame */
                skb_put(skb, le16_to_cpu(pkt->u.frame.length) +
                        IPW_RX_FRAME_SIZE);

                /* Advance past the ipw packet header to the 802.11 frame */
                skb_pull(skb, IPW_RX_FRAME_SIZE);

                /* Push the libipw_rx_stats before the 802.11 frame */
                memcpy(skb_push(skb, sizeof(*stats)), stats, sizeof(*stats));

                skb->dev = priv->ieee->dev;

                /* Point raw at the libipw_stats */
                skb_reset_mac_header(skb);

                skb->pkt_type = PACKET_OTHERHOST;
                skb->protocol = cpu_to_be16(ETH_P_80211_STATS);
                memset(skb->cb, 0, sizeof(rxb->skb->cb));
                netif_rx(skb);
                rxb->skb = NULL;
        }
}

/*
 * Main entry function for receiving a packet with 80211 headers.  This
 * should be called when ever the FW has notified us that there is a new
 * skb in the receive queue.
 */
static void ipw_rx(struct ipw_priv *priv)
{
        struct ipw_rx_mem_buffer *rxb;
        struct ipw_rx_packet *pkt;
        struct libipw_hdr_4addr *header;
        u32 r, w, i;
        u8 network_packet;
        u8 fill_rx = 0;

        r = ipw_read32(priv, IPW_RX_READ_INDEX);
        w = ipw_read32(priv, IPW_RX_WRITE_INDEX);
        i = priv->rxq->read;

        if (ipw_rx_queue_space (priv->rxq) > (RX_QUEUE_SIZE / 2))
                fill_rx = 1;

        while (i != r) {
                rxb = priv->rxq->queue[i];
                if (unlikely(rxb == NULL)) {
                        printk(KERN_CRIT "Queue not allocated!\n");
                        break;
                }
                priv->rxq->queue[i] = NULL;

                pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
                                            IPW_RX_BUF_SIZE,
                                            PCI_DMA_FROMDEVICE);

                pkt = (struct ipw_rx_packet *)rxb->skb->data;
                IPW_DEBUG_RX("Packet: type=%02X seq=%02X bits=%02X\n",
                             pkt->header.message_type,
                             pkt->header.rx_seq_num, pkt->header.control_bits);

                switch (pkt->header.message_type) {
                case RX_FRAME_TYPE:     /* 802.11 frame */  {
                                struct libipw_rx_stats stats = {
                                        .rssi = pkt->u.frame.rssi_dbm -
                                            IPW_RSSI_TO_DBM,
                                        .signal =
                                            pkt->u.frame.rssi_dbm -
                                            IPW_RSSI_TO_DBM + 0x100,
                                        .noise =
                                            le16_to_cpu(pkt->u.frame.noise),
                                        .rate = pkt->u.frame.rate,
                                        .mac_time = jiffies,
                                        .received_channel =
                                            pkt->u.frame.received_channel,
                                        .freq =
                                            (pkt->u.frame.
                                             control & (1 << 0)) ?
                                            LIBIPW_24GHZ_BAND :
                                            LIBIPW_52GHZ_BAND,
                                        .len = le16_to_cpu(pkt->u.frame.length),
                                };

                                if (stats.rssi != 0)
                                        stats.mask |= LIBIPW_STATMASK_RSSI;
                                if (stats.signal != 0)
                                        stats.mask |= LIBIPW_STATMASK_SIGNAL;
                                if (stats.noise != 0)
                                        stats.mask |= LIBIPW_STATMASK_NOISE;
                                if (stats.rate != 0)
                                        stats.mask |= LIBIPW_STATMASK_RATE;

                                priv->rx_packets++;

#ifdef CONFIG_IPW2200_PROMISCUOUS
        if (priv->prom_net_dev && netif_running(priv->prom_net_dev))
                ipw_handle_promiscuous_rx(priv, rxb, &stats);
#endif

#ifdef CONFIG_IPW2200_MONITOR
                                if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
#ifdef CONFIG_IPW2200_RADIOTAP

                ipw_handle_data_packet_monitor(priv,
                                               rxb,
                                               &stats);
#else
                ipw_handle_data_packet(priv, rxb,
                                       &stats);
#endif
                                        break;
                                }
#endif

                                header =
                                    (struct libipw_hdr_4addr *)(rxb->skb->
                                                                   data +
                                                                   IPW_RX_FRAME_SIZE);
                                /* TODO: Check Ad-Hoc dest/source and make sure
                                 * that we are actually parsing these packets
                                 * correctly -- we should probably use the
                                 * frame control of the packet and disregard
                                 * the current iw_mode */

                                network_packet =
                                    is_network_packet(priv, header);
                                if (network_packet && priv->assoc_network) {
                                        priv->assoc_network->stats.rssi =
                                            stats.rssi;
                                        priv->exp_avg_rssi =
                                            exponential_average(priv->exp_avg_rssi,
                                            stats.rssi, DEPTH_RSSI);
                                }

                                IPW_DEBUG_RX("Frame: len=%u\n",
                                             le16_to_cpu(pkt->u.frame.length));

                                if (le16_to_cpu(pkt->u.frame.length) <
                                    libipw_get_hdrlen(le16_to_cpu(
                                                    header->frame_ctl))) {
                                        IPW_DEBUG_DROP
                                            ("Received packet is too small. "
                                             "Dropping.\n");
                                        priv->net_dev->stats.rx_errors++;
                                        priv->wstats.discard.misc++;
                                        break;
                                }

                                switch (WLAN_FC_GET_TYPE
                                        (le16_to_cpu(header->frame_ctl))) {

                                case IEEE80211_FTYPE_MGMT:
                                        ipw_handle_mgmt_packet(priv, rxb,
                                                               &stats);
                                        break;

                                case IEEE80211_FTYPE_CTL:
                                        break;

                                case IEEE80211_FTYPE_DATA:
                                        if (unlikely(!network_packet ||
                                                     is_duplicate_packet(priv,
                                                                         header)))
                                        {
                                                IPW_DEBUG_DROP("Dropping: "
                                                               "%pM, "
                                                               "%pM, "
                                                               "%pM\n",
                                                               header->addr1,
                                                               header->addr2,
                                                               header->addr3);
                                                break;
                                        }

                                        ipw_handle_data_packet(priv, rxb,
                                                               &stats);

                                        break;
                                }
                                break;
                        }

                case RX_HOST_NOTIFICATION_TYPE:{
                                IPW_DEBUG_RX
                                    ("Notification: subtype=%02X flags=%02X size=%d\n",
                                     pkt->u.notification.subtype,
                                     pkt->u.notification.flags,
                                     le16_to_cpu(pkt->u.notification.size));
                                ipw_rx_notification(priv, &pkt->u.notification);
                                break;
                        }

                default:
                        IPW_DEBUG_RX("Bad Rx packet of type %d\n",
                                     pkt->header.message_type);
                        break;
                }

                /* For now we just don't re-use anything.  We can tweak this
                 * later to try and re-use notification packets and SKBs that
                 * fail to Rx correctly */
                if (rxb->skb != NULL) {
                        dev_kfree_skb_any(rxb->skb);
                        rxb->skb = NULL;
                }

                pci_unmap_single(priv->pci_dev, rxb->dma_addr,
                                 IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
                list_add_tail(&rxb->list, &priv->rxq->rx_used);

                i = (i + 1) % RX_QUEUE_SIZE;

                /* If there are a lot of unsued frames, restock the Rx queue
                 * so the ucode won't assert */
                if (fill_rx) {
                        priv->rxq->read = i;
                        ipw_rx_queue_replenish(priv);
                }
        }

        /* Backtrack one entry */
        priv->rxq->read = i;
        ipw_rx_queue_restock(priv);
}

#define DEFAULT_RTS_THRESHOLD     2304U
#define MIN_RTS_THRESHOLD         1U
#define MAX_RTS_THRESHOLD         2304U
#define DEFAULT_BEACON_INTERVAL   100U
#define DEFAULT_SHORT_RETRY_LIMIT 7U
#define DEFAULT_LONG_RETRY_LIMIT  4U

/**
 * ipw_sw_reset
 * @option: options to control different reset behaviour
 *          0 = reset everything except the 'disable' module_param
 *          1 = reset everything and print out driver info (for probe only)
 *          2 = reset everything
 */
static int ipw_sw_reset(struct ipw_priv *priv, int option)
{
        int band, modulation;
        int old_mode = priv->ieee->iw_mode;

        /* Initialize module parameter values here */
        priv->config = 0;

        /* We default to disabling the LED code as right now it causes
         * too many systems to lock up... */
        if (!led_support)
                priv->config |= CFG_NO_LED;

        if (associate)
                priv->config |= CFG_ASSOCIATE;
        else
                IPW_DEBUG_INFO("Auto associate disabled.\n");

        if (auto_create)
                priv->config |= CFG_ADHOC_CREATE;
        else
                IPW_DEBUG_INFO("Auto adhoc creation disabled.\n");

        priv->config &= ~CFG_STATIC_ESSID;
        priv->essid_len = 0;
        memset(priv->essid, 0, IW_ESSID_MAX_SIZE);

        if (disable && option) {
                priv->status |= STATUS_RF_KILL_SW;
                IPW_DEBUG_INFO("Radio disabled.\n");
        }

        if (default_channel != 0) {
                priv->config |= CFG_STATIC_CHANNEL;
                priv->channel = default_channel;
                IPW_DEBUG_INFO("Bind to static channel %d\n", default_channel);
                /* TODO: Validate that provided channel is in range */
        }
#ifdef CONFIG_IPW2200_QOS
        ipw_qos_init(priv, qos_enable, qos_burst_enable,
                     burst_duration_CCK, burst_duration_OFDM);
#endif                          /* CONFIG_IPW2200_QOS */

        switch (network_mode) {
        case 1:
                priv->ieee->iw_mode = IW_MODE_ADHOC;
                priv->net_dev->type = ARPHRD_ETHER;

                break;
#ifdef CONFIG_IPW2200_MONITOR
        case 2:
                priv->ieee->iw_mode = IW_MODE_MONITOR;
#ifdef CONFIG_IPW2200_RADIOTAP
                priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
#else
                priv->net_dev->type = ARPHRD_IEEE80211;
#endif
                break;
#endif
        default:
        case 0:
                priv->net_dev->type = ARPHRD_ETHER;
                priv->ieee->iw_mode = IW_MODE_INFRA;
                break;
        }

        if (hwcrypto) {
                priv->ieee->host_encrypt = 0;
                priv->ieee->host_encrypt_msdu = 0;
                priv->ieee->host_decrypt = 0;
                priv->ieee->host_mc_decrypt = 0;
        }
        IPW_DEBUG_INFO("Hardware crypto [%s]\n", hwcrypto ? "on" : "off");

        /* IPW2200/2915 is abled to do hardware fragmentation. */
        priv->ieee->host_open_frag = 0;

        if ((priv->pci_dev->device == 0x4223) ||
            (priv->pci_dev->device == 0x4224)) {
                if (option == 1)
                        printk(KERN_INFO DRV_NAME
                               ": Detected Intel PRO/Wireless 2915ABG Network "
                               "Connection\n");
                priv->ieee->abg_true = 1;
                band = LIBIPW_52GHZ_BAND | LIBIPW_24GHZ_BAND;
                modulation = LIBIPW_OFDM_MODULATION |
                    LIBIPW_CCK_MODULATION;
                priv->adapter = IPW_2915ABG;
                priv->ieee->mode = IEEE_A | IEEE_G | IEEE_B;
        } else {
                if (option == 1)
                        printk(KERN_INFO DRV_NAME
                               ": Detected Intel PRO/Wireless 2200BG Network "
                               "Connection\n");

                priv->ieee->abg_true = 0;
                band = LIBIPW_24GHZ_BAND;
                modulation = LIBIPW_OFDM_MODULATION |
                    LIBIPW_CCK_MODULATION;
                priv->adapter = IPW_2200BG;
                priv->ieee->mode = IEEE_G | IEEE_B;
        }

        priv->ieee->freq_band = band;
        priv->ieee->modulation = modulation;

        priv->rates_mask = LIBIPW_DEFAULT_RATES_MASK;

        priv->disassociate_threshold = IPW_MB_DISASSOCIATE_THRESHOLD_DEFAULT;
        priv->roaming_threshold = IPW_MB_ROAMING_THRESHOLD_DEFAULT;

        priv->rts_threshold = DEFAULT_RTS_THRESHOLD;
        priv->short_retry_limit = DEFAULT_SHORT_RETRY_LIMIT;
        priv->long_retry_limit = DEFAULT_LONG_RETRY_LIMIT;

        /* If power management is turned on, default to AC mode */
        priv->power_mode = IPW_POWER_AC;
        priv->tx_power = IPW_TX_POWER_DEFAULT;

        return old_mode == priv->ieee->iw_mode;
}

/*
 * This file defines the Wireless Extension handlers.  It does not
 * define any methods of hardware manipulation and relies on the
 * functions defined in ipw_main to provide the HW interaction.
 *
 * The exception to this is the use of the ipw_get_ordinal()
 * function used to poll the hardware vs. making unnecessary calls.
 *
 */

static int ipw_set_channel(struct ipw_priv *priv, u8 channel)
{
        if (channel == 0) {
                IPW_DEBUG_INFO("Setting channel to ANY (0)\n");
                priv->config &= ~CFG_STATIC_CHANNEL;
                IPW_DEBUG_ASSOC("Attempting to associate with new "
                                "parameters.\n");
                ipw_associate(priv);
                return 0;
        }

        priv->config |= CFG_STATIC_CHANNEL;

        if (priv->channel == channel) {
                IPW_DEBUG_INFO("Request to set channel to current value (%d)\n",
                               channel);
                return 0;
        }

        IPW_DEBUG_INFO("Setting channel to %i\n", (int)channel);
        priv->channel = channel;

#ifdef CONFIG_IPW2200_MONITOR
        if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
                int i;
                if (priv->status & STATUS_SCANNING) {
                        IPW_DEBUG_SCAN("Scan abort triggered due to "
                                       "channel change.\n");
                        ipw_abort_scan(priv);
                }

                for (i = 1000; i && (priv->status & STATUS_SCANNING); i--)
                        udelay(10);

                if (priv->status & STATUS_SCANNING)
                        IPW_DEBUG_SCAN("Still scanning...\n");
                else
                        IPW_DEBUG_SCAN("Took %dms to abort current scan\n",
                                       1000 - i);

                return 0;
        }
#endif                          /* CONFIG_IPW2200_MONITOR */

        /* Network configuration changed -- force [re]association */
        IPW_DEBUG_ASSOC("[re]association triggered due to channel change.\n");
        if (!ipw_disassociate(priv))
                ipw_associate(priv);

        return 0;
}

static int ipw_wx_set_freq(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
        struct iw_freq *fwrq = &wrqu->freq;
        int ret = 0, i;
        u8 channel, flags;
        int band;

        if (fwrq->m == 0) {
                IPW_DEBUG_WX("SET Freq/Channel -> any\n");
                mutex_lock(&priv->mutex);
                ret = ipw_set_channel(priv, 0);
                mutex_unlock(&priv->mutex);
                return ret;
        }
        /* if setting by freq convert to channel */
        if (fwrq->e == 1) {
                channel = libipw_freq_to_channel(priv->ieee, fwrq->m);
                if (channel == 0)
                        return -EINVAL;
        } else
                channel = fwrq->m;

        if (!(band = libipw_is_valid_channel(priv->ieee, channel)))
                return -EINVAL;

        if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
                i = libipw_channel_to_index(priv->ieee, channel);
                if (i == -1)
                        return -EINVAL;

                flags = (band == LIBIPW_24GHZ_BAND) ?
                    geo->bg[i].flags : geo->a[i].flags;
                if (flags & LIBIPW_CH_PASSIVE_ONLY) {
                        IPW_DEBUG_WX("Invalid Ad-Hoc channel for 802.11a\n");
                        return -EINVAL;
                }
        }

        IPW_DEBUG_WX("SET Freq/Channel -> %d\n", fwrq->m);
        mutex_lock(&priv->mutex);
        ret = ipw_set_channel(priv, channel);
        mutex_unlock(&priv->mutex);
        return ret;
}

static int ipw_wx_get_freq(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        wrqu->freq.e = 0;

        /* If we are associated, trying to associate, or have a statically
         * configured CHANNEL then return that; otherwise return ANY */
        mutex_lock(&priv->mutex);
        if (priv->config & CFG_STATIC_CHANNEL ||
            priv->status & (STATUS_ASSOCIATING | STATUS_ASSOCIATED)) {
                int i;

                i = libipw_channel_to_index(priv->ieee, priv->channel);
                BUG_ON(i == -1);
                wrqu->freq.e = 1;

                switch (libipw_is_valid_channel(priv->ieee, priv->channel)) {
                case LIBIPW_52GHZ_BAND:
                        wrqu->freq.m = priv->ieee->geo.a[i].freq * 100000;
                        break;

                case LIBIPW_24GHZ_BAND:
                        wrqu->freq.m = priv->ieee->geo.bg[i].freq * 100000;
                        break;

                default:
                        BUG();
                }
        } else
                wrqu->freq.m = 0;

        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("GET Freq/Channel -> %d\n", priv->channel);
        return 0;
}

static int ipw_wx_set_mode(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int err = 0;

        IPW_DEBUG_WX("Set MODE: %d\n", wrqu->mode);

        switch (wrqu->mode) {
#ifdef CONFIG_IPW2200_MONITOR
        case IW_MODE_MONITOR:
#endif
        case IW_MODE_ADHOC:
        case IW_MODE_INFRA:
                break;
        case IW_MODE_AUTO:
                wrqu->mode = IW_MODE_INFRA;
                break;
        default:
                return -EINVAL;
        }
        if (wrqu->mode == priv->ieee->iw_mode)
                return 0;

        mutex_lock(&priv->mutex);

        ipw_sw_reset(priv, 0);

#ifdef CONFIG_IPW2200_MONITOR
        if (priv->ieee->iw_mode == IW_MODE_MONITOR)
                priv->net_dev->type = ARPHRD_ETHER;

        if (wrqu->mode == IW_MODE_MONITOR)
#ifdef CONFIG_IPW2200_RADIOTAP
                priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
#else
                priv->net_dev->type = ARPHRD_IEEE80211;
#endif
#endif                          /* CONFIG_IPW2200_MONITOR */

        /* Free the existing firmware and reset the fw_loaded
         * flag so ipw_load() will bring in the new firmware */
        free_firmware();

        priv->ieee->iw_mode = wrqu->mode;

        schedule_work(&priv->adapter_restart);
        mutex_unlock(&priv->mutex);
        return err;
}

static int ipw_wx_get_mode(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        wrqu->mode = priv->ieee->iw_mode;
        IPW_DEBUG_WX("Get MODE -> %d\n", wrqu->mode);
        mutex_unlock(&priv->mutex);
        return 0;
}

/* Values are in microsecond */
static const s32 timeout_duration[] = {
        350000,
        250000,
        75000,
        37000,
        25000,
};

static const s32 period_duration[] = {
        400000,
        700000,
        1000000,
        1000000,
        1000000
};

static int ipw_wx_get_range(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct iw_range *range = (struct iw_range *)extra;
        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
        int i = 0, j;

        wrqu->data.length = sizeof(*range);
        memset(range, 0, sizeof(*range));

        /* 54Mbs == ~27 Mb/s real (802.11g) */
        range->throughput = 27 * 1000 * 1000;

        range->max_qual.qual = 100;
        /* TODO: Find real max RSSI and stick here */
        range->max_qual.level = 0;
        range->max_qual.noise = 0;
        range->max_qual.updated = 7;    /* Updated all three */

        range->avg_qual.qual = 70;
        /* TODO: Find real 'good' to 'bad' threshold value for RSSI */
        range->avg_qual.level = 0;      /* FIXME to real average level */
        range->avg_qual.noise = 0;
        range->avg_qual.updated = 7;    /* Updated all three */
        mutex_lock(&priv->mutex);
        range->num_bitrates = min(priv->rates.num_rates, (u8) IW_MAX_BITRATES);

        for (i = 0; i < range->num_bitrates; i++)
                range->bitrate[i] = (priv->rates.supported_rates[i] & 0x7F) *
                    500000;

        range->max_rts = DEFAULT_RTS_THRESHOLD;
        range->min_frag = MIN_FRAG_THRESHOLD;
        range->max_frag = MAX_FRAG_THRESHOLD;

        range->encoding_size[0] = 5;
        range->encoding_size[1] = 13;
        range->num_encoding_sizes = 2;
        range->max_encoding_tokens = WEP_KEYS;

        /* Set the Wireless Extension versions */
        range->we_version_compiled = WIRELESS_EXT;
        range->we_version_source = 18;

        i = 0;
        if (priv->ieee->mode & (IEEE_B | IEEE_G)) {
                for (j = 0; j < geo->bg_channels && i < IW_MAX_FREQUENCIES; j++) {
                        if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
                            (geo->bg[j].flags & LIBIPW_CH_PASSIVE_ONLY))
                                continue;

                        range->freq[i].i = geo->bg[j].channel;
                        range->freq[i].m = geo->bg[j].freq * 100000;
                        range->freq[i].e = 1;
                        i++;
                }
        }

        if (priv->ieee->mode & IEEE_A) {
                for (j = 0; j < geo->a_channels && i < IW_MAX_FREQUENCIES; j++) {
                        if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
                            (geo->a[j].flags & LIBIPW_CH_PASSIVE_ONLY))
                                continue;

                        range->freq[i].i = geo->a[j].channel;
                        range->freq[i].m = geo->a[j].freq * 100000;
                        range->freq[i].e = 1;
                        i++;
                }
        }

        range->num_channels = i;
        range->num_frequency = i;

        mutex_unlock(&priv->mutex);

        /* Event capability (kernel + driver) */
        range->event_capa[0] = (IW_EVENT_CAPA_K_0 |
                                IW_EVENT_CAPA_MASK(SIOCGIWTHRSPY) |
                                IW_EVENT_CAPA_MASK(SIOCGIWAP) |
                                IW_EVENT_CAPA_MASK(SIOCGIWSCAN));
        range->event_capa[1] = IW_EVENT_CAPA_K_1;

        range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
                IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;

        range->scan_capa = IW_SCAN_CAPA_ESSID | IW_SCAN_CAPA_TYPE;

        IPW_DEBUG_WX("GET Range\n");
        return 0;
}

static int ipw_wx_set_wap(struct net_device *dev,
                          struct iw_request_info *info,
                          union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        if (wrqu->ap_addr.sa_family != ARPHRD_ETHER)
                return -EINVAL;
        mutex_lock(&priv->mutex);
        if (is_broadcast_ether_addr(wrqu->ap_addr.sa_data) ||
            is_zero_ether_addr(wrqu->ap_addr.sa_data)) {
                /* we disable mandatory BSSID association */
                IPW_DEBUG_WX("Setting AP BSSID to ANY\n");
                priv->config &= ~CFG_STATIC_BSSID;
                IPW_DEBUG_ASSOC("Attempting to associate with new "
                                "parameters.\n");
                ipw_associate(priv);
                mutex_unlock(&priv->mutex);
                return 0;
        }

        priv->config |= CFG_STATIC_BSSID;
        if (ether_addr_equal(priv->bssid, wrqu->ap_addr.sa_data)) {
                IPW_DEBUG_WX("BSSID set to current BSSID.\n");
                mutex_unlock(&priv->mutex);
                return 0;
        }

        IPW_DEBUG_WX("Setting mandatory BSSID to %pM\n",
                     wrqu->ap_addr.sa_data);

        memcpy(priv->bssid, wrqu->ap_addr.sa_data, ETH_ALEN);

        /* Network configuration changed -- force [re]association */
        IPW_DEBUG_ASSOC("[re]association triggered due to BSSID change.\n");
        if (!ipw_disassociate(priv))
                ipw_associate(priv);

        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_get_wap(struct net_device *dev,
                          struct iw_request_info *info,
                          union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        /* If we are associated, trying to associate, or have a statically
         * configured BSSID then return that; otherwise return ANY */
        mutex_lock(&priv->mutex);
        if (priv->config & CFG_STATIC_BSSID ||
            priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
                wrqu->ap_addr.sa_family = ARPHRD_ETHER;
                memcpy(wrqu->ap_addr.sa_data, priv->bssid, ETH_ALEN);
        } else
                eth_zero_addr(wrqu->ap_addr.sa_data);

        IPW_DEBUG_WX("Getting WAP BSSID: %pM\n",
                     wrqu->ap_addr.sa_data);
        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_set_essid(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int length;

        mutex_lock(&priv->mutex);

        if (!wrqu->essid.flags)
        {
                IPW_DEBUG_WX("Setting ESSID to ANY\n");
                ipw_disassociate(priv);
                priv->config &= ~CFG_STATIC_ESSID;
                ipw_associate(priv);
                mutex_unlock(&priv->mutex);
                return 0;
        }

        length = min((int)wrqu->essid.length, IW_ESSID_MAX_SIZE);

        priv->config |= CFG_STATIC_ESSID;

        if (priv->essid_len == length && !memcmp(priv->essid, extra, length)
            && (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING))) {
                IPW_DEBUG_WX("ESSID set to current ESSID.\n");
                mutex_unlock(&priv->mutex);
                return 0;
        }

        IPW_DEBUG_WX("Setting ESSID: '%*pE' (%d)\n", length, extra, length);

        priv->essid_len = length;
        memcpy(priv->essid, extra, priv->essid_len);

        /* Network configuration changed -- force [re]association */
        IPW_DEBUG_ASSOC("[re]association triggered due to ESSID change.\n");
        if (!ipw_disassociate(priv))
                ipw_associate(priv);

        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_get_essid(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        /* If we are associated, trying to associate, or have a statically
         * configured ESSID then return that; otherwise return ANY */
        mutex_lock(&priv->mutex);
        if (priv->config & CFG_STATIC_ESSID ||
            priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
                IPW_DEBUG_WX("Getting essid: '%*pE'\n",
                             priv->essid_len, priv->essid);
                memcpy(extra, priv->essid, priv->essid_len);
                wrqu->essid.length = priv->essid_len;
                wrqu->essid.flags = 1;  /* active */
        } else {
                IPW_DEBUG_WX("Getting essid: ANY\n");
                wrqu->essid.length = 0;
                wrqu->essid.flags = 0;  /* active */
        }
        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_set_nick(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        IPW_DEBUG_WX("Setting nick to '%s'\n", extra);
        if (wrqu->data.length > IW_ESSID_MAX_SIZE)
                return -E2BIG;
        mutex_lock(&priv->mutex);
        wrqu->data.length = min_t(size_t, wrqu->data.length, sizeof(priv->nick));
        memset(priv->nick, 0, sizeof(priv->nick));
        memcpy(priv->nick, extra, wrqu->data.length);
        IPW_DEBUG_TRACE("<<\n");
        mutex_unlock(&priv->mutex);
        return 0;

}

static int ipw_wx_get_nick(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        IPW_DEBUG_WX("Getting nick\n");
        mutex_lock(&priv->mutex);
        wrqu->data.length = strlen(priv->nick);
        memcpy(extra, priv->nick, wrqu->data.length);
        wrqu->data.flags = 1;   /* active */
        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_set_sens(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int err = 0;

        IPW_DEBUG_WX("Setting roaming threshold to %d\n", wrqu->sens.value);
        IPW_DEBUG_WX("Setting disassociate threshold to %d\n", 3*wrqu->sens.value);
        mutex_lock(&priv->mutex);

        if (wrqu->sens.fixed == 0)
        {
                priv->roaming_threshold = IPW_MB_ROAMING_THRESHOLD_DEFAULT;
                priv->disassociate_threshold = IPW_MB_DISASSOCIATE_THRESHOLD_DEFAULT;
                goto out;
        }
        if ((wrqu->sens.value > IPW_MB_ROAMING_THRESHOLD_MAX) ||
            (wrqu->sens.value < IPW_MB_ROAMING_THRESHOLD_MIN)) {
                err = -EINVAL;
                goto out;
        }

        priv->roaming_threshold = wrqu->sens.value;
        priv->disassociate_threshold = 3*wrqu->sens.value;
      out:
        mutex_unlock(&priv->mutex);
        return err;
}

static int ipw_wx_get_sens(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        wrqu->sens.fixed = 1;
        wrqu->sens.value = priv->roaming_threshold;
        mutex_unlock(&priv->mutex);

        IPW_DEBUG_WX("GET roaming threshold -> %s %d\n",
                     wrqu->power.disabled ? "OFF" : "ON", wrqu->power.value);

        return 0;
}

static int ipw_wx_set_rate(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        /* TODO: We should use semaphores or locks for access to priv */
        struct ipw_priv *priv = libipw_priv(dev);
        u32 target_rate = wrqu->bitrate.value;
        u32 fixed, mask;

        /* value = -1, fixed = 0 means auto only, so we should use all rates offered by AP */
        /* value = X, fixed = 1 means only rate X */
        /* value = X, fixed = 0 means all rates lower equal X */

        if (target_rate == -1) {
                fixed = 0;
                mask = LIBIPW_DEFAULT_RATES_MASK;
                /* Now we should reassociate */
                goto apply;
        }

        mask = 0;
        fixed = wrqu->bitrate.fixed;

        if (target_rate == 1000000 || !fixed)
                mask |= LIBIPW_CCK_RATE_1MB_MASK;
        if (target_rate == 1000000)
                goto apply;

        if (target_rate == 2000000 || !fixed)
                mask |= LIBIPW_CCK_RATE_2MB_MASK;
        if (target_rate == 2000000)
                goto apply;

        if (target_rate == 5500000 || !fixed)
                mask |= LIBIPW_CCK_RATE_5MB_MASK;
        if (target_rate == 5500000)
                goto apply;

        if (target_rate == 6000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_6MB_MASK;
        if (target_rate == 6000000)
                goto apply;

        if (target_rate == 9000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_9MB_MASK;
        if (target_rate == 9000000)
                goto apply;

        if (target_rate == 11000000 || !fixed)
                mask |= LIBIPW_CCK_RATE_11MB_MASK;
        if (target_rate == 11000000)
                goto apply;

        if (target_rate == 12000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_12MB_MASK;
        if (target_rate == 12000000)
                goto apply;

        if (target_rate == 18000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_18MB_MASK;
        if (target_rate == 18000000)
                goto apply;

        if (target_rate == 24000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_24MB_MASK;
        if (target_rate == 24000000)
                goto apply;

        if (target_rate == 36000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_36MB_MASK;
        if (target_rate == 36000000)
                goto apply;

        if (target_rate == 48000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_48MB_MASK;
        if (target_rate == 48000000)
                goto apply;

        if (target_rate == 54000000 || !fixed)
                mask |= LIBIPW_OFDM_RATE_54MB_MASK;
        if (target_rate == 54000000)
                goto apply;

        IPW_DEBUG_WX("invalid rate specified, returning error\n");
        return -EINVAL;

      apply:
        IPW_DEBUG_WX("Setting rate mask to 0x%08X [%s]\n",
                     mask, fixed ? "fixed" : "sub-rates");
        mutex_lock(&priv->mutex);
        if (mask == LIBIPW_DEFAULT_RATES_MASK) {
                priv->config &= ~CFG_FIXED_RATE;
                ipw_set_fixed_rate(priv, priv->ieee->mode);
        } else
                priv->config |= CFG_FIXED_RATE;

        if (priv->rates_mask == mask) {
                IPW_DEBUG_WX("Mask set to current mask.\n");
                mutex_unlock(&priv->mutex);
                return 0;
        }

        priv->rates_mask = mask;

        /* Network configuration changed -- force [re]association */
        IPW_DEBUG_ASSOC("[re]association triggered due to rates change.\n");
        if (!ipw_disassociate(priv))
                ipw_associate(priv);

        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_get_rate(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        wrqu->bitrate.value = priv->last_rate;
        wrqu->bitrate.fixed = (priv->config & CFG_FIXED_RATE) ? 1 : 0;
        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("GET Rate -> %d\n", wrqu->bitrate.value);
        return 0;
}

static int ipw_wx_set_rts(struct net_device *dev,
                          struct iw_request_info *info,
                          union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        if (wrqu->rts.disabled || !wrqu->rts.fixed)
                priv->rts_threshold = DEFAULT_RTS_THRESHOLD;
        else {
                if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
                    wrqu->rts.value > MAX_RTS_THRESHOLD) {
                        mutex_unlock(&priv->mutex);
                        return -EINVAL;
                }
                priv->rts_threshold = wrqu->rts.value;
        }

        ipw_send_rts_threshold(priv, priv->rts_threshold);
        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("SET RTS Threshold -> %d\n", priv->rts_threshold);
        return 0;
}

static int ipw_wx_get_rts(struct net_device *dev,
                          struct iw_request_info *info,
                          union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        wrqu->rts.value = priv->rts_threshold;
        wrqu->rts.fixed = 0;    /* no auto select */
        wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("GET RTS Threshold -> %d\n", wrqu->rts.value);
        return 0;
}

static int ipw_wx_set_txpow(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int err = 0;

        mutex_lock(&priv->mutex);
        if (ipw_radio_kill_sw(priv, wrqu->power.disabled)) {
                err = -EINPROGRESS;
                goto out;
        }

        if (!wrqu->power.fixed)
                wrqu->power.value = IPW_TX_POWER_DEFAULT;

        if (wrqu->power.flags != IW_TXPOW_DBM) {
                err = -EINVAL;
                goto out;
        }

        if ((wrqu->power.value > IPW_TX_POWER_MAX) ||
            (wrqu->power.value < IPW_TX_POWER_MIN)) {
                err = -EINVAL;
                goto out;
        }

        priv->tx_power = wrqu->power.value;
        err = ipw_set_tx_power(priv);
      out:
        mutex_unlock(&priv->mutex);
        return err;
}

static int ipw_wx_get_txpow(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        wrqu->power.value = priv->tx_power;
        wrqu->power.fixed = 1;
        wrqu->power.flags = IW_TXPOW_DBM;
        wrqu->power.disabled = (priv->status & STATUS_RF_KILL_MASK) ? 1 : 0;
        mutex_unlock(&priv->mutex);

        IPW_DEBUG_WX("GET TX Power -> %s %d\n",
                     wrqu->power.disabled ? "OFF" : "ON", wrqu->power.value);

        return 0;
}

static int ipw_wx_set_frag(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        if (wrqu->frag.disabled || !wrqu->frag.fixed)
                priv->ieee->fts = DEFAULT_FTS;
        else {
                if (wrqu->frag.value < MIN_FRAG_THRESHOLD ||
                    wrqu->frag.value > MAX_FRAG_THRESHOLD) {
                        mutex_unlock(&priv->mutex);
                        return -EINVAL;
                }

                priv->ieee->fts = wrqu->frag.value & ~0x1;
        }

        ipw_send_frag_threshold(priv, wrqu->frag.value);
        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("SET Frag Threshold -> %d\n", wrqu->frag.value);
        return 0;
}

static int ipw_wx_get_frag(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        wrqu->frag.value = priv->ieee->fts;
        wrqu->frag.fixed = 0;   /* no auto select */
        wrqu->frag.disabled = (wrqu->frag.value == DEFAULT_FTS);
        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("GET Frag Threshold -> %d\n", wrqu->frag.value);

        return 0;
}

static int ipw_wx_set_retry(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        if (wrqu->retry.flags & IW_RETRY_LIFETIME || wrqu->retry.disabled)
                return -EINVAL;

        if (!(wrqu->retry.flags & IW_RETRY_LIMIT))
                return 0;

        if (wrqu->retry.value < 0 || wrqu->retry.value >= 255)
                return -EINVAL;

        mutex_lock(&priv->mutex);
        if (wrqu->retry.flags & IW_RETRY_SHORT)
                priv->short_retry_limit = (u8) wrqu->retry.value;
        else if (wrqu->retry.flags & IW_RETRY_LONG)
                priv->long_retry_limit = (u8) wrqu->retry.value;
        else {
                priv->short_retry_limit = (u8) wrqu->retry.value;
                priv->long_retry_limit = (u8) wrqu->retry.value;
        }

        ipw_send_retry_limit(priv, priv->short_retry_limit,
                             priv->long_retry_limit);
        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("SET retry limit -> short:%d long:%d\n",
                     priv->short_retry_limit, priv->long_retry_limit);
        return 0;
}

static int ipw_wx_get_retry(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);

        mutex_lock(&priv->mutex);
        wrqu->retry.disabled = 0;

        if ((wrqu->retry.flags & IW_RETRY_TYPE) == IW_RETRY_LIFETIME) {
                mutex_unlock(&priv->mutex);
                return -EINVAL;
        }

        if (wrqu->retry.flags & IW_RETRY_LONG) {
                wrqu->retry.flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
                wrqu->retry.value = priv->long_retry_limit;
        } else if (wrqu->retry.flags & IW_RETRY_SHORT) {
                wrqu->retry.flags = IW_RETRY_LIMIT | IW_RETRY_SHORT;
                wrqu->retry.value = priv->short_retry_limit;
        } else {
                wrqu->retry.flags = IW_RETRY_LIMIT;
                wrqu->retry.value = priv->short_retry_limit;
        }
        mutex_unlock(&priv->mutex);

        IPW_DEBUG_WX("GET retry -> %d\n", wrqu->retry.value);

        return 0;
}

static int ipw_wx_set_scan(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct iw_scan_req *req = (struct iw_scan_req *)extra;
        struct delayed_work *work = NULL;

        mutex_lock(&priv->mutex);

        priv->user_requested_scan = 1;

        if (wrqu->data.length == sizeof(struct iw_scan_req)) {
                if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
                        int len = min((int)req->essid_len,
                                      (int)sizeof(priv->direct_scan_ssid));
                        memcpy(priv->direct_scan_ssid, req->essid, len);
                        priv->direct_scan_ssid_len = len;
                        work = &priv->request_direct_scan;
                } else if (req->scan_type == IW_SCAN_TYPE_PASSIVE) {
                        work = &priv->request_passive_scan;
                }
        } else {
                /* Normal active broadcast scan */
                work = &priv->request_scan;
        }

        mutex_unlock(&priv->mutex);

        IPW_DEBUG_WX("Start scan\n");

        schedule_delayed_work(work, 0);

        return 0;
}

static int ipw_wx_get_scan(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        return libipw_wx_get_scan(priv->ieee, info, wrqu, extra);
}

static int ipw_wx_set_encode(struct net_device *dev,
                             struct iw_request_info *info,
                             union iwreq_data *wrqu, char *key)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int ret;
        u32 cap = priv->capability;

        mutex_lock(&priv->mutex);
        ret = libipw_wx_set_encode(priv->ieee, info, wrqu, key);

        /* In IBSS mode, we need to notify the firmware to update
         * the beacon info after we changed the capability. */
        if (cap != priv->capability &&
            priv->ieee->iw_mode == IW_MODE_ADHOC &&
            priv->status & STATUS_ASSOCIATED)
                ipw_disassociate(priv);

        mutex_unlock(&priv->mutex);
        return ret;
}

static int ipw_wx_get_encode(struct net_device *dev,
                             struct iw_request_info *info,
                             union iwreq_data *wrqu, char *key)
{
        struct ipw_priv *priv = libipw_priv(dev);
        return libipw_wx_get_encode(priv->ieee, info, wrqu, key);
}

static int ipw_wx_set_power(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int err;
        mutex_lock(&priv->mutex);
        if (wrqu->power.disabled) {
                priv->power_mode = IPW_POWER_LEVEL(priv->power_mode);
                err = ipw_send_power_mode(priv, IPW_POWER_MODE_CAM);
                if (err) {
                        IPW_DEBUG_WX("failed setting power mode.\n");
                        mutex_unlock(&priv->mutex);
                        return err;
                }
                IPW_DEBUG_WX("SET Power Management Mode -> off\n");
                mutex_unlock(&priv->mutex);
                return 0;
        }

        switch (wrqu->power.flags & IW_POWER_MODE) {
        case IW_POWER_ON:       /* If not specified */
        case IW_POWER_MODE:     /* If set all mask */
        case IW_POWER_ALL_R:    /* If explicitly state all */
                break;
        default:                /* Otherwise we don't support it */
                IPW_DEBUG_WX("SET PM Mode: %X not supported.\n",
                             wrqu->power.flags);
                mutex_unlock(&priv->mutex);
                return -EOPNOTSUPP;
        }

        /* If the user hasn't specified a power management mode yet, default
         * to BATTERY */
        if (IPW_POWER_LEVEL(priv->power_mode) == IPW_POWER_AC)
                priv->power_mode = IPW_POWER_ENABLED | IPW_POWER_BATTERY;
        else
                priv->power_mode = IPW_POWER_ENABLED | priv->power_mode;

        err = ipw_send_power_mode(priv, IPW_POWER_LEVEL(priv->power_mode));
        if (err) {
                IPW_DEBUG_WX("failed setting power mode.\n");
                mutex_unlock(&priv->mutex);
                return err;
        }

        IPW_DEBUG_WX("SET Power Management Mode -> 0x%02X\n", priv->power_mode);
        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_get_power(struct net_device *dev,
                            struct iw_request_info *info,
                            union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        if (!(priv->power_mode & IPW_POWER_ENABLED))
                wrqu->power.disabled = 1;
        else
                wrqu->power.disabled = 0;

        mutex_unlock(&priv->mutex);
        IPW_DEBUG_WX("GET Power Management Mode -> %02X\n", priv->power_mode);

        return 0;
}

static int ipw_wx_set_powermode(struct net_device *dev,
                                struct iw_request_info *info,
                                union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int mode = *(int *)extra;
        int err;

        mutex_lock(&priv->mutex);
        if ((mode < 1) || (mode > IPW_POWER_LIMIT))
                mode = IPW_POWER_AC;

        if (IPW_POWER_LEVEL(priv->power_mode) != mode) {
                err = ipw_send_power_mode(priv, mode);
                if (err) {
                        IPW_DEBUG_WX("failed setting power mode.\n");
                        mutex_unlock(&priv->mutex);
                        return err;
                }
                priv->power_mode = IPW_POWER_ENABLED | mode;
        }
        mutex_unlock(&priv->mutex);
        return 0;
}

#define MAX_WX_STRING 80
static int ipw_wx_get_powermode(struct net_device *dev,
                                struct iw_request_info *info,
                                union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int level = IPW_POWER_LEVEL(priv->power_mode);
        char *p = extra;

        p += snprintf(p, MAX_WX_STRING, "Power save level: %d ", level);

        switch (level) {
        case IPW_POWER_AC:
                p += snprintf(p, MAX_WX_STRING - (p - extra), "(AC)");
                break;
        case IPW_POWER_BATTERY:
                p += snprintf(p, MAX_WX_STRING - (p - extra), "(BATTERY)");
                break;
        default:
                p += snprintf(p, MAX_WX_STRING - (p - extra),
                              "(Timeout %dms, Period %dms)",
                              timeout_duration[level - 1] / 1000,
                              period_duration[level - 1] / 1000);
        }

        if (!(priv->power_mode & IPW_POWER_ENABLED))
                p += snprintf(p, MAX_WX_STRING - (p - extra), " OFF");

        wrqu->data.length = p - extra + 1;

        return 0;
}

static int ipw_wx_set_wireless_mode(struct net_device *dev,
                                    struct iw_request_info *info,
                                    union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int mode = *(int *)extra;
        u8 band = 0, modulation = 0;

        if (mode == 0 || mode & ~IEEE_MODE_MASK) {
                IPW_WARNING("Attempt to set invalid wireless mode: %d\n", mode);
                return -EINVAL;
        }
        mutex_lock(&priv->mutex);
        if (priv->adapter == IPW_2915ABG) {
                priv->ieee->abg_true = 1;
                if (mode & IEEE_A) {
                        band |= LIBIPW_52GHZ_BAND;
                        modulation |= LIBIPW_OFDM_MODULATION;
                } else
                        priv->ieee->abg_true = 0;
        } else {
                if (mode & IEEE_A) {
                        IPW_WARNING("Attempt to set 2200BG into "
                                    "802.11a mode\n");
                        mutex_unlock(&priv->mutex);
                        return -EINVAL;
                }

                priv->ieee->abg_true = 0;
        }

        if (mode & IEEE_B) {
                band |= LIBIPW_24GHZ_BAND;
                modulation |= LIBIPW_CCK_MODULATION;
        } else
                priv->ieee->abg_true = 0;

        if (mode & IEEE_G) {
                band |= LIBIPW_24GHZ_BAND;
                modulation |= LIBIPW_OFDM_MODULATION;
        } else
                priv->ieee->abg_true = 0;

        priv->ieee->mode = mode;
        priv->ieee->freq_band = band;
        priv->ieee->modulation = modulation;
        init_supported_rates(priv, &priv->rates);

        /* Network configuration changed -- force [re]association */
        IPW_DEBUG_ASSOC("[re]association triggered due to mode change.\n");
        if (!ipw_disassociate(priv)) {
                ipw_send_supported_rates(priv, &priv->rates);
                ipw_associate(priv);
        }

        /* Update the band LEDs */
        ipw_led_band_on(priv);

        IPW_DEBUG_WX("PRIV SET MODE: %c%c%c\n",
                     mode & IEEE_A ? 'a' : '.',
                     mode & IEEE_B ? 'b' : '.', mode & IEEE_G ? 'g' : '.');
        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_get_wireless_mode(struct net_device *dev,
                                    struct iw_request_info *info,
                                    union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        switch (priv->ieee->mode) {
        case IEEE_A:
                strncpy(extra, "802.11a (1)", MAX_WX_STRING);
                break;
        case IEEE_B:
                strncpy(extra, "802.11b (2)", MAX_WX_STRING);
                break;
        case IEEE_A | IEEE_B:
                strncpy(extra, "802.11ab (3)", MAX_WX_STRING);
                break;
        case IEEE_G:
                strncpy(extra, "802.11g (4)", MAX_WX_STRING);
                break;
        case IEEE_A | IEEE_G:
                strncpy(extra, "802.11ag (5)", MAX_WX_STRING);
                break;
        case IEEE_B | IEEE_G:
                strncpy(extra, "802.11bg (6)", MAX_WX_STRING);
                break;
        case IEEE_A | IEEE_B | IEEE_G:
                strncpy(extra, "802.11abg (7)", MAX_WX_STRING);
                break;
        default:
                strncpy(extra, "unknown", MAX_WX_STRING);
                break;
        }
        extra[MAX_WX_STRING - 1] = '\0';

        IPW_DEBUG_WX("PRIV GET MODE: %s\n", extra);

        wrqu->data.length = strlen(extra) + 1;
        mutex_unlock(&priv->mutex);

        return 0;
}

static int ipw_wx_set_preamble(struct net_device *dev,
                               struct iw_request_info *info,
                               union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int mode = *(int *)extra;
        mutex_lock(&priv->mutex);
        /* Switching from SHORT -> LONG requires a disassociation */
        if (mode == 1) {
                if (!(priv->config & CFG_PREAMBLE_LONG)) {
                        priv->config |= CFG_PREAMBLE_LONG;

                        /* Network configuration changed -- force [re]association */
                        IPW_DEBUG_ASSOC
                            ("[re]association triggered due to preamble change.\n");
                        if (!ipw_disassociate(priv))
                                ipw_associate(priv);
                }
                goto done;
        }

        if (mode == 0) {
                priv->config &= ~CFG_PREAMBLE_LONG;
                goto done;
        }
        mutex_unlock(&priv->mutex);
        return -EINVAL;

      done:
        mutex_unlock(&priv->mutex);
        return 0;
}

static int ipw_wx_get_preamble(struct net_device *dev,
                               struct iw_request_info *info,
                               union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        mutex_lock(&priv->mutex);
        if (priv->config & CFG_PREAMBLE_LONG)
                snprintf(wrqu->name, IFNAMSIZ, "long (1)");
        else
                snprintf(wrqu->name, IFNAMSIZ, "auto (0)");
        mutex_unlock(&priv->mutex);
        return 0;
}

#ifdef CONFIG_IPW2200_MONITOR
static int ipw_wx_set_monitor(struct net_device *dev,
                              struct iw_request_info *info,
                              union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int *parms = (int *)extra;
        int enable = (parms[0] > 0);
        mutex_lock(&priv->mutex);
        IPW_DEBUG_WX("SET MONITOR: %d %d\n", enable, parms[1]);
        if (enable) {
                if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
#ifdef CONFIG_IPW2200_RADIOTAP
                        priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
#else
                        priv->net_dev->type = ARPHRD_IEEE80211;
#endif
                        schedule_work(&priv->adapter_restart);
                }

                ipw_set_channel(priv, parms[1]);
        } else {
                if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
                        mutex_unlock(&priv->mutex);
                        return 0;
                }
                priv->net_dev->type = ARPHRD_ETHER;
                schedule_work(&priv->adapter_restart);
        }
        mutex_unlock(&priv->mutex);
        return 0;
}

#endif                          /* CONFIG_IPW2200_MONITOR */

static int ipw_wx_reset(struct net_device *dev,
                        struct iw_request_info *info,
                        union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        IPW_DEBUG_WX("RESET\n");
        schedule_work(&priv->adapter_restart);
        return 0;
}

static int ipw_wx_sw_reset(struct net_device *dev,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = libipw_priv(dev);
        union iwreq_data wrqu_sec = {
                .encoding = {
                             .flags = IW_ENCODE_DISABLED,
                             },
        };
        int ret;

        IPW_DEBUG_WX("SW_RESET\n");

        mutex_lock(&priv->mutex);

        ret = ipw_sw_reset(priv, 2);
        if (!ret) {
                free_firmware();
                ipw_adapter_restart(priv);
        }

        /* The SW reset bit might have been toggled on by the 'disable'
         * module parameter, so take appropriate action */
        ipw_radio_kill_sw(priv, priv->status & STATUS_RF_KILL_SW);

        mutex_unlock(&priv->mutex);
        libipw_wx_set_encode(priv->ieee, info, &wrqu_sec, NULL);
        mutex_lock(&priv->mutex);

        if (!(priv->status & STATUS_RF_KILL_MASK)) {
                /* Configuration likely changed -- force [re]association */
                IPW_DEBUG_ASSOC("[re]association triggered due to sw "
                                "reset.\n");
                if (!ipw_disassociate(priv))
                        ipw_associate(priv);
        }

        mutex_unlock(&priv->mutex);

        return 0;
}

/* Rebase the WE IOCTLs to zero for the handler array */
static iw_handler ipw_wx_handlers[] = {
        IW_HANDLER(SIOCGIWNAME, (iw_handler)cfg80211_wext_giwname),
        IW_HANDLER(SIOCSIWFREQ, ipw_wx_set_freq),
        IW_HANDLER(SIOCGIWFREQ, ipw_wx_get_freq),
        IW_HANDLER(SIOCSIWMODE, ipw_wx_set_mode),
        IW_HANDLER(SIOCGIWMODE, ipw_wx_get_mode),
        IW_HANDLER(SIOCSIWSENS, ipw_wx_set_sens),
        IW_HANDLER(SIOCGIWSENS, ipw_wx_get_sens),
        IW_HANDLER(SIOCGIWRANGE, ipw_wx_get_range),
        IW_HANDLER(SIOCSIWAP, ipw_wx_set_wap),
        IW_HANDLER(SIOCGIWAP, ipw_wx_get_wap),
        IW_HANDLER(SIOCSIWSCAN, ipw_wx_set_scan),
        IW_HANDLER(SIOCGIWSCAN, ipw_wx_get_scan),
        IW_HANDLER(SIOCSIWESSID, ipw_wx_set_essid),
        IW_HANDLER(SIOCGIWESSID, ipw_wx_get_essid),
        IW_HANDLER(SIOCSIWNICKN, ipw_wx_set_nick),
        IW_HANDLER(SIOCGIWNICKN, ipw_wx_get_nick),
        IW_HANDLER(SIOCSIWRATE, ipw_wx_set_rate),
        IW_HANDLER(SIOCGIWRATE, ipw_wx_get_rate),
        IW_HANDLER(SIOCSIWRTS, ipw_wx_set_rts),
        IW_HANDLER(SIOCGIWRTS, ipw_wx_get_rts),
        IW_HANDLER(SIOCSIWFRAG, ipw_wx_set_frag),
        IW_HANDLER(SIOCGIWFRAG, ipw_wx_get_frag),
        IW_HANDLER(SIOCSIWTXPOW, ipw_wx_set_txpow),
        IW_HANDLER(SIOCGIWTXPOW, ipw_wx_get_txpow),
        IW_HANDLER(SIOCSIWRETRY, ipw_wx_set_retry),
        IW_HANDLER(SIOCGIWRETRY, ipw_wx_get_retry),
        IW_HANDLER(SIOCSIWENCODE, ipw_wx_set_encode),
        IW_HANDLER(SIOCGIWENCODE, ipw_wx_get_encode),
        IW_HANDLER(SIOCSIWPOWER, ipw_wx_set_power),
        IW_HANDLER(SIOCGIWPOWER, ipw_wx_get_power),
        IW_HANDLER(SIOCSIWSPY, iw_handler_set_spy),
        IW_HANDLER(SIOCGIWSPY, iw_handler_get_spy),
        IW_HANDLER(SIOCSIWTHRSPY, iw_handler_set_thrspy),
        IW_HANDLER(SIOCGIWTHRSPY, iw_handler_get_thrspy),
        IW_HANDLER(SIOCSIWGENIE, ipw_wx_set_genie),
        IW_HANDLER(SIOCGIWGENIE, ipw_wx_get_genie),
        IW_HANDLER(SIOCSIWMLME, ipw_wx_set_mlme),
        IW_HANDLER(SIOCSIWAUTH, ipw_wx_set_auth),
        IW_HANDLER(SIOCGIWAUTH, ipw_wx_get_auth),
        IW_HANDLER(SIOCSIWENCODEEXT, ipw_wx_set_encodeext),
        IW_HANDLER(SIOCGIWENCODEEXT, ipw_wx_get_encodeext),
};

enum {
        IPW_PRIV_SET_POWER = SIOCIWFIRSTPRIV,
        IPW_PRIV_GET_POWER,
        IPW_PRIV_SET_MODE,
        IPW_PRIV_GET_MODE,
        IPW_PRIV_SET_PREAMBLE,
        IPW_PRIV_GET_PREAMBLE,
        IPW_PRIV_RESET,
        IPW_PRIV_SW_RESET,
#ifdef CONFIG_IPW2200_MONITOR
        IPW_PRIV_SET_MONITOR,
#endif
};

static struct iw_priv_args ipw_priv_args[] = {
        {
         .cmd = IPW_PRIV_SET_POWER,
         .set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
         .name = "set_power"},
        {
         .cmd = IPW_PRIV_GET_POWER,
         .get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | MAX_WX_STRING,
         .name = "get_power"},
        {
         .cmd = IPW_PRIV_SET_MODE,
         .set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
         .name = "set_mode"},
        {
         .cmd = IPW_PRIV_GET_MODE,
         .get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | MAX_WX_STRING,
         .name = "get_mode"},
        {
         .cmd = IPW_PRIV_SET_PREAMBLE,
         .set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
         .name = "set_preamble"},
        {
         .cmd = IPW_PRIV_GET_PREAMBLE,
         .get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | IFNAMSIZ,
         .name = "get_preamble"},
        {
         IPW_PRIV_RESET,
         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 0, 0, "reset"},
        {
         IPW_PRIV_SW_RESET,
         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 0, 0, "sw_reset"},
#ifdef CONFIG_IPW2200_MONITOR
        {
         IPW_PRIV_SET_MONITOR,
         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 2, 0, "monitor"},
#endif                          /* CONFIG_IPW2200_MONITOR */
};

static iw_handler ipw_priv_handler[] = {
        ipw_wx_set_powermode,
        ipw_wx_get_powermode,
        ipw_wx_set_wireless_mode,
        ipw_wx_get_wireless_mode,
        ipw_wx_set_preamble,
        ipw_wx_get_preamble,
        ipw_wx_reset,
        ipw_wx_sw_reset,
#ifdef CONFIG_IPW2200_MONITOR
        ipw_wx_set_monitor,
#endif
};

static struct iw_handler_def ipw_wx_handler_def = {
        .standard = ipw_wx_handlers,
        .num_standard = ARRAY_SIZE(ipw_wx_handlers),
        .num_private = ARRAY_SIZE(ipw_priv_handler),
        .num_private_args = ARRAY_SIZE(ipw_priv_args),
        .private = ipw_priv_handler,
        .private_args = ipw_priv_args,
        .get_wireless_stats = ipw_get_wireless_stats,
};

/*
 * Get wireless statistics.
 * Called by /proc/net/wireless
 * Also called by SIOCGIWSTATS
 */
static struct iw_statistics *ipw_get_wireless_stats(struct net_device *dev)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct iw_statistics *wstats;

        wstats = &priv->wstats;

        /* if hw is disabled, then ipw_get_ordinal() can't be called.
         * netdev->get_wireless_stats seems to be called before fw is
         * initialized.  STATUS_ASSOCIATED will only be set if the hw is up
         * and associated; if not associcated, the values are all meaningless
         * anyway, so set them all to NULL and INVALID */
        if (!(priv->status & STATUS_ASSOCIATED)) {
                wstats->miss.beacon = 0;
                wstats->discard.retries = 0;
                wstats->qual.qual = 0;
                wstats->qual.level = 0;
                wstats->qual.noise = 0;
                wstats->qual.updated = 7;
                wstats->qual.updated |= IW_QUAL_NOISE_INVALID |
                    IW_QUAL_QUAL_INVALID | IW_QUAL_LEVEL_INVALID;
                return wstats;
        }

        wstats->qual.qual = priv->quality;
        wstats->qual.level = priv->exp_avg_rssi;
        wstats->qual.noise = priv->exp_avg_noise;
        wstats->qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
            IW_QUAL_NOISE_UPDATED | IW_QUAL_DBM;

        wstats->miss.beacon = average_value(&priv->average_missed_beacons);
        wstats->discard.retries = priv->last_tx_failures;
        wstats->discard.code = priv->ieee->ieee_stats.rx_discards_undecryptable;

/*      if (ipw_get_ordinal(priv, IPW_ORD_STAT_TX_RETRY, &tx_retry, &len))
        goto fail_get_ordinal;
        wstats->discard.retries += tx_retry; */

        return wstats;
}

/* net device stuff */

static  void init_sys_config(struct ipw_sys_config *sys_config)
{
        memset(sys_config, 0, sizeof(struct ipw_sys_config));
        sys_config->bt_coexistence = 0;
        sys_config->answer_broadcast_ssid_probe = 0;
        sys_config->accept_all_data_frames = 0;
        sys_config->accept_non_directed_frames = 1;
        sys_config->exclude_unicast_unencrypted = 0;
        sys_config->disable_unicast_decryption = 1;
        sys_config->exclude_multicast_unencrypted = 0;
        sys_config->disable_multicast_decryption = 1;
        if (antenna < CFG_SYS_ANTENNA_BOTH || antenna > CFG_SYS_ANTENNA_B)
                antenna = CFG_SYS_ANTENNA_BOTH;
        sys_config->antenna_diversity = antenna;
        sys_config->pass_crc_to_host = 0;       /* TODO: See if 1 gives us FCS */
        sys_config->dot11g_auto_detection = 0;
        sys_config->enable_cts_to_self = 0;
        sys_config->bt_coexist_collision_thr = 0;
        sys_config->pass_noise_stats_to_host = 1;       /* 1 -- fix for 256 */
        sys_config->silence_threshold = 0x1e;
}

static int ipw_net_open(struct net_device *dev)
{
        IPW_DEBUG_INFO("dev->open\n");
        netif_start_queue(dev);
        return 0;
}

static int ipw_net_stop(struct net_device *dev)
{
        IPW_DEBUG_INFO("dev->close\n");
        netif_stop_queue(dev);
        return 0;
}

/*
todo:

modify to send one tfd per fragment instead of using chunking.  otherwise
we need to heavily modify the libipw_skb_to_txb.
*/

static int ipw_tx_skb(struct ipw_priv *priv, struct libipw_txb *txb,
                             int pri)
{
        struct libipw_hdr_3addrqos *hdr = (struct libipw_hdr_3addrqos *)
            txb->fragments[0]->data;
        int i = 0;
        struct tfd_frame *tfd;
#ifdef CONFIG_IPW2200_QOS
        int tx_id = ipw_get_tx_queue_number(priv, pri);
        struct clx2_tx_queue *txq = &priv->txq[tx_id];
#else
        struct clx2_tx_queue *txq = &priv->txq[0];
#endif
        struct clx2_queue *q = &txq->q;
        u8 id, hdr_len, unicast;
        int fc;

        if (!(priv->status & STATUS_ASSOCIATED))
                goto drop;

        hdr_len = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
        switch (priv->ieee->iw_mode) {
        case IW_MODE_ADHOC:
                unicast = !is_multicast_ether_addr(hdr->addr1);
                id = ipw_find_station(priv, hdr->addr1);
                if (id == IPW_INVALID_STATION) {
                        id = ipw_add_station(priv, hdr->addr1);
                        if (id == IPW_INVALID_STATION) {
                                IPW_WARNING("Attempt to send data to "
                                            "invalid cell: %pM\n",
                                            hdr->addr1);
                                goto drop;
                        }
                }
                break;

        case IW_MODE_INFRA:
        default:
                unicast = !is_multicast_ether_addr(hdr->addr3);
                id = 0;
                break;
        }

        tfd = &txq->bd[q->first_empty];
        txq->txb[q->first_empty] = txb;
        memset(tfd, 0, sizeof(*tfd));
        tfd->u.data.station_number = id;

        tfd->control_flags.message_type = TX_FRAME_TYPE;
        tfd->control_flags.control_bits = TFD_NEED_IRQ_MASK;

        tfd->u.data.cmd_id = DINO_CMD_TX;
        tfd->u.data.len = cpu_to_le16(txb->payload_size);

        if (priv->assoc_request.ieee_mode == IPW_B_MODE)
                tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_MODE_CCK;
        else
                tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_MODE_OFDM;

        if (priv->assoc_request.preamble_length == DCT_FLAG_SHORT_PREAMBLE)
                tfd->u.data.tx_flags |= DCT_FLAG_SHORT_PREAMBLE;

        fc = le16_to_cpu(hdr->frame_ctl);
        hdr->frame_ctl = cpu_to_le16(fc & ~IEEE80211_FCTL_MOREFRAGS);

        memcpy(&tfd->u.data.tfd.tfd_24.mchdr, hdr, hdr_len);

        if (likely(unicast))
                tfd->u.data.tx_flags |= DCT_FLAG_ACK_REQD;

        if (txb->encrypted && !priv->ieee->host_encrypt) {
                switch (priv->ieee->sec.level) {
                case SEC_LEVEL_3:
                        tfd->u.data.tfd.tfd_24.mchdr.frame_ctl |=
                            cpu_to_le16(IEEE80211_FCTL_PROTECTED);
                        /* XXX: ACK flag must be set for CCMP even if it
                         * is a multicast/broadcast packet, because CCMP
                         * group communication encrypted by GTK is
                         * actually done by the AP. */
                        if (!unicast)
                                tfd->u.data.tx_flags |= DCT_FLAG_ACK_REQD;

                        tfd->u.data.tx_flags &= ~DCT_FLAG_NO_WEP;
                        tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_SECURITY_CCM;
                        tfd->u.data.key_index = 0;
                        tfd->u.data.key_index |= DCT_WEP_INDEX_USE_IMMEDIATE;
                        break;
                case SEC_LEVEL_2:
                        tfd->u.data.tfd.tfd_24.mchdr.frame_ctl |=
                            cpu_to_le16(IEEE80211_FCTL_PROTECTED);
                        tfd->u.data.tx_flags &= ~DCT_FLAG_NO_WEP;
                        tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_SECURITY_TKIP;
                        tfd->u.data.key_index = DCT_WEP_INDEX_USE_IMMEDIATE;
                        break;
                case SEC_LEVEL_1:
                        tfd->u.data.tfd.tfd_24.mchdr.frame_ctl |=
                            cpu_to_le16(IEEE80211_FCTL_PROTECTED);
                        tfd->u.data.key_index = priv->ieee->crypt_info.tx_keyidx;
                        if (priv->ieee->sec.key_sizes[priv->ieee->crypt_info.tx_keyidx] <=
                            40)
                                tfd->u.data.key_index |= DCT_WEP_KEY_64Bit;
                        else
                                tfd->u.data.key_index |= DCT_WEP_KEY_128Bit;
                        break;
                case SEC_LEVEL_0:
                        break;
                default:
                        printk(KERN_ERR "Unknown security level %d\n",
                               priv->ieee->sec.level);
                        break;
                }
        } else
                /* No hardware encryption */
                tfd->u.data.tx_flags |= DCT_FLAG_NO_WEP;

#ifdef CONFIG_IPW2200_QOS
        if (fc & IEEE80211_STYPE_QOS_DATA)
                ipw_qos_set_tx_queue_command(priv, pri, &(tfd->u.data));
#endif                          /* CONFIG_IPW2200_QOS */

        /* payload */
        tfd->u.data.num_chunks = cpu_to_le32(min((u8) (NUM_TFD_CHUNKS - 2),
                                                 txb->nr_frags));
        IPW_DEBUG_FRAG("%i fragments being sent as %i chunks.\n",
                       txb->nr_frags, le32_to_cpu(tfd->u.data.num_chunks));
        for (i = 0; i < le32_to_cpu(tfd->u.data.num_chunks); i++) {
                IPW_DEBUG_FRAG("Adding fragment %i of %i (%d bytes).\n",
                               i, le32_to_cpu(tfd->u.data.num_chunks),
                               txb->fragments[i]->len - hdr_len);
                IPW_DEBUG_TX("Dumping TX packet frag %i of %i (%d bytes):\n",
                             i, tfd->u.data.num_chunks,
                             txb->fragments[i]->len - hdr_len);
                printk_buf(IPW_DL_TX, txb->fragments[i]->data + hdr_len,
                           txb->fragments[i]->len - hdr_len);

                tfd->u.data.chunk_ptr[i] =
                    cpu_to_le32(pci_map_single
                                (priv->pci_dev,
                                 txb->fragments[i]->data + hdr_len,
                                 txb->fragments[i]->len - hdr_len,
                                 PCI_DMA_TODEVICE));
                tfd->u.data.chunk_len[i] =
                    cpu_to_le16(txb->fragments[i]->len - hdr_len);
        }

        if (i != txb->nr_frags) {
                struct sk_buff *skb;
                u16 remaining_bytes = 0;
                int j;

                for (j = i; j < txb->nr_frags; j++)
                        remaining_bytes += txb->fragments[j]->len - hdr_len;

                printk(KERN_INFO "Trying to reallocate for %d bytes\n",
                       remaining_bytes);
                skb = alloc_skb(remaining_bytes, GFP_ATOMIC);
                if (skb != NULL) {
                        tfd->u.data.chunk_len[i] = cpu_to_le16(remaining_bytes);
                        for (j = i; j < txb->nr_frags; j++) {
                                int size = txb->fragments[j]->len - hdr_len;

                                printk(KERN_INFO "Adding frag %d %d...\n",
                                       j, size);
                                skb_put_data(skb,
                                             txb->fragments[j]->data + hdr_len,
                                             size);
                        }
                        dev_kfree_skb_any(txb->fragments[i]);
                        txb->fragments[i] = skb;
                        tfd->u.data.chunk_ptr[i] =
                            cpu_to_le32(pci_map_single
                                        (priv->pci_dev, skb->data,
                                         remaining_bytes,
                                         PCI_DMA_TODEVICE));

                        le32_add_cpu(&tfd->u.data.num_chunks, 1);
                }
        }

        /* kick DMA */
        q->first_empty = ipw_queue_inc_wrap(q->first_empty, q->n_bd);
        ipw_write32(priv, q->reg_w, q->first_empty);

        if (ipw_tx_queue_space(q) < q->high_mark)
                netif_stop_queue(priv->net_dev);

        return NETDEV_TX_OK;

      drop:
        IPW_DEBUG_DROP("Silently dropping Tx packet.\n");
        libipw_txb_free(txb);
        return NETDEV_TX_OK;
}

static int ipw_net_is_queue_full(struct net_device *dev, int pri)
{
        struct ipw_priv *priv = libipw_priv(dev);
#ifdef CONFIG_IPW2200_QOS
        int tx_id = ipw_get_tx_queue_number(priv, pri);
        struct clx2_tx_queue *txq = &priv->txq[tx_id];
#else
        struct clx2_tx_queue *txq = &priv->txq[0];
#endif                          /* CONFIG_IPW2200_QOS */

        if (ipw_tx_queue_space(&txq->q) < txq->q.high_mark)
                return 1;

        return 0;
}

#ifdef CONFIG_IPW2200_PROMISCUOUS
static void ipw_handle_promiscuous_tx(struct ipw_priv *priv,
                                      struct libipw_txb *txb)
{
        struct libipw_rx_stats dummystats;
        struct ieee80211_hdr *hdr;
        u8 n;
        u16 filter = priv->prom_priv->filter;
        int hdr_only = 0;

        if (filter & IPW_PROM_NO_TX)
                return;

        memset(&dummystats, 0, sizeof(dummystats));

        /* Filtering of fragment chains is done against the first fragment */
        hdr = (void *)txb->fragments[0]->data;
        if (libipw_is_management(le16_to_cpu(hdr->frame_control))) {
                if (filter & IPW_PROM_NO_MGMT)
                        return;
                if (filter & IPW_PROM_MGMT_HEADER_ONLY)
                        hdr_only = 1;
        } else if (libipw_is_control(le16_to_cpu(hdr->frame_control))) {
                if (filter & IPW_PROM_NO_CTL)
                        return;
                if (filter & IPW_PROM_CTL_HEADER_ONLY)
                        hdr_only = 1;
        } else if (libipw_is_data(le16_to_cpu(hdr->frame_control))) {
                if (filter & IPW_PROM_NO_DATA)
                        return;
                if (filter & IPW_PROM_DATA_HEADER_ONLY)
                        hdr_only = 1;
        }

        for(n=0; n<txb->nr_frags; ++n) {
                struct sk_buff *src = txb->fragments[n];
                struct sk_buff *dst;
                struct ieee80211_radiotap_header *rt_hdr;
                int len;

                if (hdr_only) {
                        hdr = (void *)src->data;
                        len = libipw_get_hdrlen(le16_to_cpu(hdr->frame_control));
                } else
                        len = src->len;

                dst = alloc_skb(len + sizeof(*rt_hdr) + sizeof(u16)*2, GFP_ATOMIC);
                if (!dst)
                        continue;

                rt_hdr = skb_put(dst, sizeof(*rt_hdr));

                rt_hdr->it_version = PKTHDR_RADIOTAP_VERSION;
                rt_hdr->it_pad = 0;
                rt_hdr->it_present = 0; /* after all, it's just an idea */
                rt_hdr->it_present |=  cpu_to_le32(1 << IEEE80211_RADIOTAP_CHANNEL);

                *(__le16*)skb_put(dst, sizeof(u16)) = cpu_to_le16(
                        ieee80211chan2mhz(priv->channel));
                if (priv->channel > 14)         /* 802.11a */
                        *(__le16*)skb_put(dst, sizeof(u16)) =
                                cpu_to_le16(IEEE80211_CHAN_OFDM |
                                             IEEE80211_CHAN_5GHZ);
                else if (priv->ieee->mode == IEEE_B) /* 802.11b */
                        *(__le16*)skb_put(dst, sizeof(u16)) =
                                cpu_to_le16(IEEE80211_CHAN_CCK |
                                             IEEE80211_CHAN_2GHZ);
                else            /* 802.11g */
                        *(__le16*)skb_put(dst, sizeof(u16)) =
                                cpu_to_le16(IEEE80211_CHAN_OFDM |
                                 IEEE80211_CHAN_2GHZ);

                rt_hdr->it_len = cpu_to_le16(dst->len);

                skb_copy_from_linear_data(src, skb_put(dst, len), len);

                if (!libipw_rx(priv->prom_priv->ieee, dst, &dummystats))
                        dev_kfree_skb_any(dst);
        }
}
#endif

static netdev_tx_t ipw_net_hard_start_xmit(struct libipw_txb *txb,
                                           struct net_device *dev, int pri)
{
        struct ipw_priv *priv = libipw_priv(dev);
        unsigned long flags;
        netdev_tx_t ret;

        IPW_DEBUG_TX("dev->xmit(%d bytes)\n", txb->payload_size);
        spin_lock_irqsave(&priv->lock, flags);

#ifdef CONFIG_IPW2200_PROMISCUOUS
        if (rtap_iface && netif_running(priv->prom_net_dev))
                ipw_handle_promiscuous_tx(priv, txb);
#endif

        ret = ipw_tx_skb(priv, txb, pri);
        if (ret == NETDEV_TX_OK)
                __ipw_led_activity_on(priv);
        spin_unlock_irqrestore(&priv->lock, flags);

        return ret;
}

static void ipw_net_set_multicast_list(struct net_device *dev)
{

}

static int ipw_net_set_mac_address(struct net_device *dev, void *p)
{
        struct ipw_priv *priv = libipw_priv(dev);
        struct sockaddr *addr = p;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;
        mutex_lock(&priv->mutex);
        priv->config |= CFG_CUSTOM_MAC;
        memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
        printk(KERN_INFO "%s: Setting MAC to %pM\n",
               priv->net_dev->name, priv->mac_addr);
        schedule_work(&priv->adapter_restart);
        mutex_unlock(&priv->mutex);
        return 0;
}

static void ipw_ethtool_get_drvinfo(struct net_device *dev,
                                    struct ethtool_drvinfo *info)
{
        struct ipw_priv *p = libipw_priv(dev);
        char vers[64];
        char date[32];
        u32 len;

        strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
        strlcpy(info->version, DRV_VERSION, sizeof(info->version));

        len = sizeof(vers);
        ipw_get_ordinal(p, IPW_ORD_STAT_FW_VERSION, vers, &len);
        len = sizeof(date);
        ipw_get_ordinal(p, IPW_ORD_STAT_FW_DATE, date, &len);

        snprintf(info->fw_version, sizeof(info->fw_version), "%s (%s)",
                 vers, date);
        strlcpy(info->bus_info, pci_name(p->pci_dev),
                sizeof(info->bus_info));
}

static u32 ipw_ethtool_get_link(struct net_device *dev)
{
        struct ipw_priv *priv = libipw_priv(dev);
        return (priv->status & STATUS_ASSOCIATED) != 0;
}

static int ipw_ethtool_get_eeprom_len(struct net_device *dev)
{
        return IPW_EEPROM_IMAGE_SIZE;
}

static int ipw_ethtool_get_eeprom(struct net_device *dev,
                                  struct ethtool_eeprom *eeprom, u8 * bytes)
{
        struct ipw_priv *p = libipw_priv(dev);

        if (eeprom->offset + eeprom->len > IPW_EEPROM_IMAGE_SIZE)
                return -EINVAL;
        mutex_lock(&p->mutex);
        memcpy(bytes, &p->eeprom[eeprom->offset], eeprom->len);
        mutex_unlock(&p->mutex);
        return 0;
}

static int ipw_ethtool_set_eeprom(struct net_device *dev,
                                  struct ethtool_eeprom *eeprom, u8 * bytes)
{
        struct ipw_priv *p = libipw_priv(dev);
        int i;

        if (eeprom->offset + eeprom->len > IPW_EEPROM_IMAGE_SIZE)
                return -EINVAL;
        mutex_lock(&p->mutex);
        memcpy(&p->eeprom[eeprom->offset], bytes, eeprom->len);
        for (i = 0; i < IPW_EEPROM_IMAGE_SIZE; i++)
                ipw_write8(p, i + IPW_EEPROM_DATA, p->eeprom[i]);
        mutex_unlock(&p->mutex);
        return 0;
}

static const struct ethtool_ops ipw_ethtool_ops = {
        .get_link = ipw_ethtool_get_link,
        .get_drvinfo = ipw_ethtool_get_drvinfo,
        .get_eeprom_len = ipw_ethtool_get_eeprom_len,
        .get_eeprom = ipw_ethtool_get_eeprom,
        .set_eeprom = ipw_ethtool_set_eeprom,
};

static irqreturn_t ipw_isr(int irq, void *data)
{
        struct ipw_priv *priv = data;
        u32 inta, inta_mask;

        if (!priv)
                return IRQ_NONE;

        spin_lock(&priv->irq_lock);

        if (!(priv->status & STATUS_INT_ENABLED)) {
                /* IRQ is disabled */
                goto none;
        }

        inta = ipw_read32(priv, IPW_INTA_RW);
        inta_mask = ipw_read32(priv, IPW_INTA_MASK_R);

        if (inta == 0xFFFFFFFF) {
                /* Hardware disappeared */
                IPW_WARNING("IRQ INTA == 0xFFFFFFFF\n");
                goto none;
        }

        if (!(inta & (IPW_INTA_MASK_ALL & inta_mask))) {
                /* Shared interrupt */
                goto none;
        }

        /* tell the device to stop sending interrupts */
        __ipw_disable_interrupts(priv);

        /* ack current interrupts */
        inta &= (IPW_INTA_MASK_ALL & inta_mask);
        ipw_write32(priv, IPW_INTA_RW, inta);

        /* Cache INTA value for our tasklet */
        priv->isr_inta = inta;

        tasklet_schedule(&priv->irq_tasklet);

        spin_unlock(&priv->irq_lock);

        return IRQ_HANDLED;
      none:
        spin_unlock(&priv->irq_lock);
        return IRQ_NONE;
}

static void ipw_rf_kill(void *adapter)
{
        struct ipw_priv *priv = adapter;
        unsigned long flags;

        spin_lock_irqsave(&priv->lock, flags);

        if (rf_kill_active(priv)) {
                IPW_DEBUG_RF_KILL("RF Kill active, rescheduling GPIO check\n");
                schedule_delayed_work(&priv->rf_kill, 2 * HZ);
                goto exit_unlock;
        }

        /* RF Kill is now disabled, so bring the device back up */

        if (!(priv->status & STATUS_RF_KILL_MASK)) {
                IPW_DEBUG_RF_KILL("HW RF Kill no longer active, restarting "
                                  "device\n");

                /* we can not do an adapter restart while inside an irq lock */
                schedule_work(&priv->adapter_restart);
        } else
                IPW_DEBUG_RF_KILL("HW RF Kill deactivated.  SW RF Kill still "
                                  "enabled\n");

      exit_unlock:
        spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_rf_kill(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, rf_kill.work);
        mutex_lock(&priv->mutex);
        ipw_rf_kill(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_link_up(struct ipw_priv *priv)
{
        priv->last_seq_num = -1;
        priv->last_frag_num = -1;
        priv->last_packet_time = 0;

        netif_carrier_on(priv->net_dev);

        cancel_delayed_work(&priv->request_scan);
        cancel_delayed_work(&priv->request_direct_scan);
        cancel_delayed_work(&priv->request_passive_scan);
        cancel_delayed_work(&priv->scan_event);
        ipw_reset_stats(priv);
        /* Ensure the rate is updated immediately */
        priv->last_rate = ipw_get_current_rate(priv);
        ipw_gather_stats(priv);
        ipw_led_link_up(priv);
        notify_wx_assoc_event(priv);

        if (priv->config & CFG_BACKGROUND_SCAN)
                schedule_delayed_work(&priv->request_scan, HZ);
}

static void ipw_bg_link_up(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, link_up);
        mutex_lock(&priv->mutex);
        ipw_link_up(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_link_down(struct ipw_priv *priv)
{
        ipw_led_link_down(priv);
        netif_carrier_off(priv->net_dev);
        notify_wx_assoc_event(priv);

        /* Cancel any queued work ... */
        cancel_delayed_work(&priv->request_scan);
        cancel_delayed_work(&priv->request_direct_scan);
        cancel_delayed_work(&priv->request_passive_scan);
        cancel_delayed_work(&priv->adhoc_check);
        cancel_delayed_work(&priv->gather_stats);

        ipw_reset_stats(priv);

        if (!(priv->status & STATUS_EXIT_PENDING)) {
                /* Queue up another scan... */
                schedule_delayed_work(&priv->request_scan, 0);
        } else
                cancel_delayed_work(&priv->scan_event);
}

static void ipw_bg_link_down(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, link_down);
        mutex_lock(&priv->mutex);
        ipw_link_down(priv);
        mutex_unlock(&priv->mutex);
}

static int ipw_setup_deferred_work(struct ipw_priv *priv)
{
        int ret = 0;

        init_waitqueue_head(&priv->wait_command_queue);
        init_waitqueue_head(&priv->wait_state);

        INIT_DELAYED_WORK(&priv->adhoc_check, ipw_bg_adhoc_check);
        INIT_WORK(&priv->associate, ipw_bg_associate);
        INIT_WORK(&priv->disassociate, ipw_bg_disassociate);
        INIT_WORK(&priv->system_config, ipw_system_config);
        INIT_WORK(&priv->rx_replenish, ipw_bg_rx_queue_replenish);
        INIT_WORK(&priv->adapter_restart, ipw_bg_adapter_restart);
        INIT_DELAYED_WORK(&priv->rf_kill, ipw_bg_rf_kill);
        INIT_WORK(&priv->up, ipw_bg_up);
        INIT_WORK(&priv->down, ipw_bg_down);
        INIT_DELAYED_WORK(&priv->request_scan, ipw_request_scan);
        INIT_DELAYED_WORK(&priv->request_direct_scan, ipw_request_direct_scan);
        INIT_DELAYED_WORK(&priv->request_passive_scan, ipw_request_passive_scan);
        INIT_DELAYED_WORK(&priv->scan_event, ipw_scan_event);
        INIT_DELAYED_WORK(&priv->gather_stats, ipw_bg_gather_stats);
        INIT_WORK(&priv->abort_scan, ipw_bg_abort_scan);
        INIT_WORK(&priv->roam, ipw_bg_roam);
        INIT_DELAYED_WORK(&priv->scan_check, ipw_bg_scan_check);
        INIT_WORK(&priv->link_up, ipw_bg_link_up);
        INIT_WORK(&priv->link_down, ipw_bg_link_down);
        INIT_DELAYED_WORK(&priv->led_link_on, ipw_bg_led_link_on);
        INIT_DELAYED_WORK(&priv->led_link_off, ipw_bg_led_link_off);
        INIT_DELAYED_WORK(&priv->led_act_off, ipw_bg_led_activity_off);
        INIT_WORK(&priv->merge_networks, ipw_merge_adhoc_network);

#ifdef CONFIG_IPW2200_QOS
        INIT_WORK(&priv->qos_activate, ipw_bg_qos_activate);
#endif                          /* CONFIG_IPW2200_QOS */

        tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
                     ipw_irq_tasklet, (unsigned long)priv);

        return ret;
}

static void shim__set_security(struct net_device *dev,
                               struct libipw_security *sec)
{
        struct ipw_priv *priv = libipw_priv(dev);
        int i;
        for (i = 0; i < 4; i++) {
                if (sec->flags & (1 << i)) {
                        priv->ieee->sec.encode_alg[i] = sec->encode_alg[i];
                        priv->ieee->sec.key_sizes[i] = sec->key_sizes[i];
                        if (sec->key_sizes[i] == 0)
                                priv->ieee->sec.flags &= ~(1 << i);
                        else {
                                memcpy(priv->ieee->sec.keys[i], sec->keys[i],
                                       sec->key_sizes[i]);
                                priv->ieee->sec.flags |= (1 << i);
                        }
                        priv->status |= STATUS_SECURITY_UPDATED;
                } else if (sec->level != SEC_LEVEL_1)
                        priv->ieee->sec.flags &= ~(1 << i);
        }

        if (sec->flags & SEC_ACTIVE_KEY) {
                if (sec->active_key <= 3) {
                        priv->ieee->sec.active_key = sec->active_key;
                        priv->ieee->sec.flags |= SEC_ACTIVE_KEY;
                } else
                        priv->ieee->sec.flags &= ~SEC_ACTIVE_KEY;
                priv->status |= STATUS_SECURITY_UPDATED;
        } else
                priv->ieee->sec.flags &= ~SEC_ACTIVE_KEY;

        if ((sec->flags & SEC_AUTH_MODE) &&
            (priv->ieee->sec.auth_mode != sec->auth_mode)) {
                priv->ieee->sec.auth_mode = sec->auth_mode;
                priv->ieee->sec.flags |= SEC_AUTH_MODE;
                if (sec->auth_mode == WLAN_AUTH_SHARED_KEY)
                        priv->capability |= CAP_SHARED_KEY;
                else
                        priv->capability &= ~CAP_SHARED_KEY;
                priv->status |= STATUS_SECURITY_UPDATED;
        }

        if (sec->flags & SEC_ENABLED && priv->ieee->sec.enabled != sec->enabled) {
                priv->ieee->sec.flags |= SEC_ENABLED;
                priv->ieee->sec.enabled = sec->enabled;
                priv->status |= STATUS_SECURITY_UPDATED;
                if (sec->enabled)
                        priv->capability |= CAP_PRIVACY_ON;
                else
                        priv->capability &= ~CAP_PRIVACY_ON;
        }

        if (sec->flags & SEC_ENCRYPT)
                priv->ieee->sec.encrypt = sec->encrypt;

        if (sec->flags & SEC_LEVEL && priv->ieee->sec.level != sec->level) {
                priv->ieee->sec.level = sec->level;
                priv->ieee->sec.flags |= SEC_LEVEL;
                priv->status |= STATUS_SECURITY_UPDATED;
        }

        if (!priv->ieee->host_encrypt && (sec->flags & SEC_ENCRYPT))
                ipw_set_hwcrypto_keys(priv);

        /* To match current functionality of ipw2100 (which works well w/
         * various supplicants, we don't force a disassociate if the
         * privacy capability changes ... */
#if 0
        if ((priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) &&
            (((priv->assoc_request.capability &
               cpu_to_le16(WLAN_CAPABILITY_PRIVACY)) && !sec->enabled) ||
             (!(priv->assoc_request.capability &
                cpu_to_le16(WLAN_CAPABILITY_PRIVACY)) && sec->enabled))) {
                IPW_DEBUG_ASSOC("Disassociating due to capability "
                                "change.\n");
                ipw_disassociate(priv);
        }
#endif
}

static int init_supported_rates(struct ipw_priv *priv,
                                struct ipw_supported_rates *rates)
{
        /* TODO: Mask out rates based on priv->rates_mask */

        memset(rates, 0, sizeof(*rates));
        /* configure supported rates */
        switch (priv->ieee->freq_band) {
        case LIBIPW_52GHZ_BAND:
                rates->ieee_mode = IPW_A_MODE;
                rates->purpose = IPW_RATE_CAPABILITIES;
                ipw_add_ofdm_scan_rates(rates, LIBIPW_CCK_MODULATION,
                                        LIBIPW_OFDM_DEFAULT_RATES_MASK);
                break;

        default:                /* Mixed or 2.4Ghz */
                rates->ieee_mode = IPW_G_MODE;
                rates->purpose = IPW_RATE_CAPABILITIES;
                ipw_add_cck_scan_rates(rates, LIBIPW_CCK_MODULATION,
                                       LIBIPW_CCK_DEFAULT_RATES_MASK);
                if (priv->ieee->modulation & LIBIPW_OFDM_MODULATION) {
                        ipw_add_ofdm_scan_rates(rates, LIBIPW_CCK_MODULATION,
                                                LIBIPW_OFDM_DEFAULT_RATES_MASK);
                }
                break;
        }

        return 0;
}

static int ipw_config(struct ipw_priv *priv)
{
        /* This is only called from ipw_up, which resets/reloads the firmware
           so, we don't need to first disable the card before we configure
           it */
        if (ipw_set_tx_power(priv))
                goto error;

        /* initialize adapter address */
        if (ipw_send_adapter_address(priv, priv->net_dev->dev_addr))
                goto error;

        /* set basic system config settings */
        init_sys_config(&priv->sys_config);

        /* Support Bluetooth if we have BT h/w on board, and user wants to.
         * Does not support BT priority yet (don't abort or defer our Tx) */
        if (bt_coexist) {
                unsigned char bt_caps = priv->eeprom[EEPROM_SKU_CAPABILITY];

                if (bt_caps & EEPROM_SKU_CAP_BT_CHANNEL_SIG)
                        priv->sys_config.bt_coexistence
                            |= CFG_BT_COEXISTENCE_SIGNAL_CHNL;
                if (bt_caps & EEPROM_SKU_CAP_BT_OOB)
                        priv->sys_config.bt_coexistence
                            |= CFG_BT_COEXISTENCE_OOB;
        }

#ifdef CONFIG_IPW2200_PROMISCUOUS
        if (priv->prom_net_dev && netif_running(priv->prom_net_dev)) {
                priv->sys_config.accept_all_data_frames = 1;
                priv->sys_config.accept_non_directed_frames = 1;
                priv->sys_config.accept_all_mgmt_bcpr = 1;
                priv->sys_config.accept_all_mgmt_frames = 1;
        }
#endif

        if (priv->ieee->iw_mode == IW_MODE_ADHOC)
                priv->sys_config.answer_broadcast_ssid_probe = 1;
        else
                priv->sys_config.answer_broadcast_ssid_probe = 0;

        if (ipw_send_system_config(priv))
                goto error;

        init_supported_rates(priv, &priv->rates);
        if (ipw_send_supported_rates(priv, &priv->rates))
                goto error;

        /* Set request-to-send threshold */
        if (priv->rts_threshold) {
                if (ipw_send_rts_threshold(priv, priv->rts_threshold))
                        goto error;
        }
#ifdef CONFIG_IPW2200_QOS
        IPW_DEBUG_QOS("QoS: call ipw_qos_activate\n");
        ipw_qos_activate(priv, NULL);
#endif                          /* CONFIG_IPW2200_QOS */

        if (ipw_set_random_seed(priv))
                goto error;

        /* final state transition to the RUN state */
        if (ipw_send_host_complete(priv))
                goto error;

        priv->status |= STATUS_INIT;

        ipw_led_init(priv);
        ipw_led_radio_on(priv);
        priv->notif_missed_beacons = 0;

        /* Set hardware WEP key if it is configured. */
        if ((priv->capability & CAP_PRIVACY_ON) &&
            (priv->ieee->sec.level == SEC_LEVEL_1) &&
            !(priv->ieee->host_encrypt || priv->ieee->host_decrypt))
                ipw_set_hwcrypto_keys(priv);

        return 0;

      error:
        return -EIO;
}

/*
 * NOTE:
 *
 * These tables have been tested in conjunction with the
 * Intel PRO/Wireless 2200BG and 2915ABG Network Connection Adapters.
 *
 * Altering this values, using it on other hardware, or in geographies
 * not intended for resale of the above mentioned Intel adapters has
 * not been tested.
 *
 * Remember to update the table in README.ipw2200 when changing this
 * table.
 *
 */
static const struct libipw_geo ipw_geos[] = {
        {                       /* Restricted */
         "---",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         },

        {                       /* Custom US/Canada */
         "ZZF",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         .a_channels = 8,
         .a = {{5180, 36},
               {5200, 40},
               {5220, 44},
               {5240, 48},
               {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
               {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
               {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
               {5320, 64, LIBIPW_CH_PASSIVE_ONLY}},
         },

        {                       /* Rest of World */
         "ZZD",
         .bg_channels = 13,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}, {2467, 12},
                {2472, 13}},
         },

        {                       /* Custom USA & Europe & High */
         "ZZA",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         .a_channels = 13,
         .a = {{5180, 36},
               {5200, 40},
               {5220, 44},
               {5240, 48},
               {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
               {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
               {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
               {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
               {5745, 149},
               {5765, 153},
               {5785, 157},
               {5805, 161},
               {5825, 165}},
         },

        {                       /* Custom NA & Europe */
         "ZZB",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         .a_channels = 13,
         .a = {{5180, 36},
               {5200, 40},
               {5220, 44},
               {5240, 48},
               {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
               {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
               {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
               {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
               {5745, 149, LIBIPW_CH_PASSIVE_ONLY},
               {5765, 153, LIBIPW_CH_PASSIVE_ONLY},
               {5785, 157, LIBIPW_CH_PASSIVE_ONLY},
               {5805, 161, LIBIPW_CH_PASSIVE_ONLY},
               {5825, 165, LIBIPW_CH_PASSIVE_ONLY}},
         },

        {                       /* Custom Japan */
         "ZZC",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         .a_channels = 4,
         .a = {{5170, 34}, {5190, 38},
               {5210, 42}, {5230, 46}},
         },

        {                       /* Custom */
         "ZZM",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         },

        {                       /* Europe */
         "ZZE",
         .bg_channels = 13,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}, {2467, 12},
                {2472, 13}},
         .a_channels = 19,
         .a = {{5180, 36},
               {5200, 40},
               {5220, 44},
               {5240, 48},
               {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
               {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
               {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
               {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
               {5500, 100, LIBIPW_CH_PASSIVE_ONLY},
               {5520, 104, LIBIPW_CH_PASSIVE_ONLY},
               {5540, 108, LIBIPW_CH_PASSIVE_ONLY},
               {5560, 112, LIBIPW_CH_PASSIVE_ONLY},
               {5580, 116, LIBIPW_CH_PASSIVE_ONLY},
               {5600, 120, LIBIPW_CH_PASSIVE_ONLY},
               {5620, 124, LIBIPW_CH_PASSIVE_ONLY},
               {5640, 128, LIBIPW_CH_PASSIVE_ONLY},
               {5660, 132, LIBIPW_CH_PASSIVE_ONLY},
               {5680, 136, LIBIPW_CH_PASSIVE_ONLY},
               {5700, 140, LIBIPW_CH_PASSIVE_ONLY}},
         },

        {                       /* Custom Japan */
         "ZZJ",
         .bg_channels = 14,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}, {2467, 12},
                {2472, 13}, {2484, 14, LIBIPW_CH_B_ONLY}},
         .a_channels = 4,
         .a = {{5170, 34}, {5190, 38},
               {5210, 42}, {5230, 46}},
         },

        {                       /* Rest of World */
         "ZZR",
         .bg_channels = 14,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}, {2467, 12},
                {2472, 13}, {2484, 14, LIBIPW_CH_B_ONLY |
                             LIBIPW_CH_PASSIVE_ONLY}},
         },

        {                       /* High Band */
         "ZZH",
         .bg_channels = 13,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11},
                {2467, 12, LIBIPW_CH_PASSIVE_ONLY},
                {2472, 13, LIBIPW_CH_PASSIVE_ONLY}},
         .a_channels = 4,
         .a = {{5745, 149}, {5765, 153},
               {5785, 157}, {5805, 161}},
         },

        {                       /* Custom Europe */
         "ZZG",
         .bg_channels = 13,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11},
                {2467, 12}, {2472, 13}},
         .a_channels = 4,
         .a = {{5180, 36}, {5200, 40},
               {5220, 44}, {5240, 48}},
         },

        {                       /* Europe */
         "ZZK",
         .bg_channels = 13,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11},
                {2467, 12, LIBIPW_CH_PASSIVE_ONLY},
                {2472, 13, LIBIPW_CH_PASSIVE_ONLY}},
         .a_channels = 24,
         .a = {{5180, 36, LIBIPW_CH_PASSIVE_ONLY},
               {5200, 40, LIBIPW_CH_PASSIVE_ONLY},
               {5220, 44, LIBIPW_CH_PASSIVE_ONLY},
               {5240, 48, LIBIPW_CH_PASSIVE_ONLY},
               {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
               {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
               {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
               {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
               {5500, 100, LIBIPW_CH_PASSIVE_ONLY},
               {5520, 104, LIBIPW_CH_PASSIVE_ONLY},
               {5540, 108, LIBIPW_CH_PASSIVE_ONLY},
               {5560, 112, LIBIPW_CH_PASSIVE_ONLY},
               {5580, 116, LIBIPW_CH_PASSIVE_ONLY},
               {5600, 120, LIBIPW_CH_PASSIVE_ONLY},
               {5620, 124, LIBIPW_CH_PASSIVE_ONLY},
               {5640, 128, LIBIPW_CH_PASSIVE_ONLY},
               {5660, 132, LIBIPW_CH_PASSIVE_ONLY},
               {5680, 136, LIBIPW_CH_PASSIVE_ONLY},
               {5700, 140, LIBIPW_CH_PASSIVE_ONLY},
               {5745, 149, LIBIPW_CH_PASSIVE_ONLY},
               {5765, 153, LIBIPW_CH_PASSIVE_ONLY},
               {5785, 157, LIBIPW_CH_PASSIVE_ONLY},
               {5805, 161, LIBIPW_CH_PASSIVE_ONLY},
               {5825, 165, LIBIPW_CH_PASSIVE_ONLY}},
         },

        {                       /* Europe */
         "ZZL",
         .bg_channels = 11,
         .bg = {{2412, 1}, {2417, 2}, {2422, 3},
                {2427, 4}, {2432, 5}, {2437, 6},
                {2442, 7}, {2447, 8}, {2452, 9},
                {2457, 10}, {2462, 11}},
         .a_channels = 13,
         .a = {{5180, 36, LIBIPW_CH_PASSIVE_ONLY},
               {5200, 40, LIBIPW_CH_PASSIVE_ONLY},
               {5220, 44, LIBIPW_CH_PASSIVE_ONLY},
               {5240, 48, LIBIPW_CH_PASSIVE_ONLY},
               {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
               {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
               {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
               {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
               {5745, 149, LIBIPW_CH_PASSIVE_ONLY},
               {5765, 153, LIBIPW_CH_PASSIVE_ONLY},
               {5785, 157, LIBIPW_CH_PASSIVE_ONLY},
               {5805, 161, LIBIPW_CH_PASSIVE_ONLY},
               {5825, 165, LIBIPW_CH_PASSIVE_ONLY}},
         }
};

static void ipw_set_geo(struct ipw_priv *priv)
{
        int j;

        for (j = 0; j < ARRAY_SIZE(ipw_geos); j++) {
                if (!memcmp(&priv->eeprom[EEPROM_COUNTRY_CODE],
                            ipw_geos[j].name, 3))
                        break;
        }

        if (j == ARRAY_SIZE(ipw_geos)) {
                IPW_WARNING("SKU [%c%c%c] not recognized.\n",
                            priv->eeprom[EEPROM_COUNTRY_CODE + 0],
                            priv->eeprom[EEPROM_COUNTRY_CODE + 1],
                            priv->eeprom[EEPROM_COUNTRY_CODE + 2]);
                j = 0;
        }

        libipw_set_geo(priv->ieee, &ipw_geos[j]);
}

#define MAX_HW_RESTARTS 5
static int ipw_up(struct ipw_priv *priv)
{
        int rc, i;

        /* Age scan list entries found before suspend */
        if (priv->suspend_time) {
                libipw_networks_age(priv->ieee, priv->suspend_time);
                priv->suspend_time = 0;
        }

        if (priv->status & STATUS_EXIT_PENDING)
                return -EIO;

        if (cmdlog && !priv->cmdlog) {
                priv->cmdlog = kcalloc(cmdlog, sizeof(*priv->cmdlog),
                                       GFP_KERNEL);
                if (priv->cmdlog == NULL) {
                        IPW_ERROR("Error allocating %d command log entries.\n",
                                  cmdlog);
                        return -ENOMEM;
                } else {
                        priv->cmdlog_len = cmdlog;
                }
        }

        for (i = 0; i < MAX_HW_RESTARTS; i++) {
                /* Load the microcode, firmware, and eeprom.
                 * Also start the clocks. */
                rc = ipw_load(priv);
                if (rc) {
                        IPW_ERROR("Unable to load firmware: %d\n", rc);
                        return rc;
                }

                ipw_init_ordinals(priv);
                if (!(priv->config & CFG_CUSTOM_MAC))
                        eeprom_parse_mac(priv, priv->mac_addr);
                memcpy(priv->net_dev->dev_addr, priv->mac_addr, ETH_ALEN);

                ipw_set_geo(priv);

                if (priv->status & STATUS_RF_KILL_SW) {
                        IPW_WARNING("Radio disabled by module parameter.\n");
                        return 0;
                } else if (rf_kill_active(priv)) {
                        IPW_WARNING("Radio Frequency Kill Switch is On:\n"
                                    "Kill switch must be turned off for "
                                    "wireless networking to work.\n");
                        schedule_delayed_work(&priv->rf_kill, 2 * HZ);
                        return 0;
                }

                rc = ipw_config(priv);
                if (!rc) {
                        IPW_DEBUG_INFO("Configured device on count %i\n", i);

                        /* If configure to try and auto-associate, kick
                         * off a scan. */
                        schedule_delayed_work(&priv->request_scan, 0);

                        return 0;
                }

                IPW_DEBUG_INFO("Device configuration failed: 0x%08X\n", rc);
                IPW_DEBUG_INFO("Failed to config device on retry %d of %d\n",
                               i, MAX_HW_RESTARTS);

                /* We had an error bringing up the hardware, so take it
                 * all the way back down so we can try again */
                ipw_down(priv);
        }

        /* tried to restart and config the device for as long as our
         * patience could withstand */
        IPW_ERROR("Unable to initialize device after %d attempts.\n", i);

        return -EIO;
}

static void ipw_bg_up(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, up);
        mutex_lock(&priv->mutex);
        ipw_up(priv);
        mutex_unlock(&priv->mutex);
}

static void ipw_deinit(struct ipw_priv *priv)
{
        int i;

        if (priv->status & STATUS_SCANNING) {
                IPW_DEBUG_INFO("Aborting scan during shutdown.\n");
                ipw_abort_scan(priv);
        }

        if (priv->status & STATUS_ASSOCIATED) {
                IPW_DEBUG_INFO("Disassociating during shutdown.\n");
                ipw_disassociate(priv);
        }

        ipw_led_shutdown(priv);

        /* Wait up to 1s for status to change to not scanning and not
         * associated (disassociation can take a while for a ful 802.11
         * exchange */
        for (i = 1000; i && (priv->status &
                             (STATUS_DISASSOCIATING |
                              STATUS_ASSOCIATED | STATUS_SCANNING)); i--)
                udelay(10);

        if (priv->status & (STATUS_DISASSOCIATING |
                            STATUS_ASSOCIATED | STATUS_SCANNING))
                IPW_DEBUG_INFO("Still associated or scanning...\n");
        else
                IPW_DEBUG_INFO("Took %dms to de-init\n", 1000 - i);

        /* Attempt to disable the card */
        ipw_send_card_disable(priv, 0);

        priv->status &= ~STATUS_INIT;
}

static void ipw_down(struct ipw_priv *priv)
{
        int exit_pending = priv->status & STATUS_EXIT_PENDING;

        priv->status |= STATUS_EXIT_PENDING;

        if (ipw_is_init(priv))
                ipw_deinit(priv);

        /* Wipe out the EXIT_PENDING status bit if we are not actually
         * exiting the module */
        if (!exit_pending)
                priv->status &= ~STATUS_EXIT_PENDING;

        /* tell the device to stop sending interrupts */
        ipw_disable_interrupts(priv);

        /* Clear all bits but the RF Kill */
        priv->status &= STATUS_RF_KILL_MASK | STATUS_EXIT_PENDING;
        netif_carrier_off(priv->net_dev);

        ipw_stop_nic(priv);

        ipw_led_radio_off(priv);
}

static void ipw_bg_down(struct work_struct *work)
{
        struct ipw_priv *priv =
                container_of(work, struct ipw_priv, down);
        mutex_lock(&priv->mutex);
        ipw_down(priv);
        mutex_unlock(&priv->mutex);
}

static int ipw_wdev_init(struct net_device *dev)
{
        int i, rc = 0;
        struct ipw_priv *priv = libipw_priv(dev);
        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
        struct wireless_dev *wdev = &priv->ieee->wdev;

        memcpy(wdev->wiphy->perm_addr, priv->mac_addr, ETH_ALEN);

        /* fill-out priv->ieee->bg_band */
        if (geo->bg_channels) {
                struct ieee80211_supported_band *bg_band = &priv->ieee->bg_band;

                bg_band->band = NL80211_BAND_2GHZ;
                bg_band->n_channels = geo->bg_channels;
                bg_band->channels = kcalloc(geo->bg_channels,
                                            sizeof(struct ieee80211_channel),
                                            GFP_KERNEL);
                if (!bg_band->channels) {
                        rc = -ENOMEM;
                        goto out;
                }
                /* translate geo->bg to bg_band.channels */
                for (i = 0; i < geo->bg_channels; i++) {
                        bg_band->channels[i].band = NL80211_BAND_2GHZ;
                        bg_band->channels[i].center_freq = geo->bg[i].freq;
                        bg_band->channels[i].hw_value = geo->bg[i].channel;
                        bg_band->channels[i].max_power = geo->bg[i].max_power;
                        if (geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY)
                                bg_band->channels[i].flags |=
                                        IEEE80211_CHAN_NO_IR;
                        if (geo->bg[i].flags & LIBIPW_CH_NO_IBSS)
                                bg_band->channels[i].flags |=
                                        IEEE80211_CHAN_NO_IR;
                        if (geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT)
                                bg_band->channels[i].flags |=
                                        IEEE80211_CHAN_RADAR;
                        /* No equivalent for LIBIPW_CH_80211H_RULES,
                           LIBIPW_CH_UNIFORM_SPREADING, or
                           LIBIPW_CH_B_ONLY... */
                }
                /* point at bitrate info */
                bg_band->bitrates = ipw2200_bg_rates;
                bg_band->n_bitrates = ipw2200_num_bg_rates;

                wdev->wiphy->bands[NL80211_BAND_2GHZ] = bg_band;
        }

        /* fill-out priv->ieee->a_band */
        if (geo->a_channels) {
                struct ieee80211_supported_band *a_band = &priv->ieee->a_band;

                a_band->band = NL80211_BAND_5GHZ;
                a_band->n_channels = geo->a_channels;
                a_band->channels = kcalloc(geo->a_channels,
                                           sizeof(struct ieee80211_channel),
                                           GFP_KERNEL);
                if (!a_band->channels) {
                        rc = -ENOMEM;
                        goto out;
                }
                /* translate geo->a to a_band.channels */
                for (i = 0; i < geo->a_channels; i++) {
                        a_band->channels[i].band = NL80211_BAND_5GHZ;
                        a_band->channels[i].center_freq = geo->a[i].freq;
                        a_band->channels[i].hw_value = geo->a[i].channel;
                        a_band->channels[i].max_power = geo->a[i].max_power;
                        if (geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY)
                                a_band->channels[i].flags |=
                                        IEEE80211_CHAN_NO_IR;
                        if (geo->a[i].flags & LIBIPW_CH_NO_IBSS)
                                a_band->channels[i].flags |=
                                        IEEE80211_CHAN_NO_IR;
                        if (geo->a[i].flags & LIBIPW_CH_RADAR_DETECT)
                                a_band->channels[i].flags |=
                                        IEEE80211_CHAN_RADAR;
                        /* No equivalent for LIBIPW_CH_80211H_RULES,
                           LIBIPW_CH_UNIFORM_SPREADING, or
                           LIBIPW_CH_B_ONLY... */
                }
                /* point at bitrate info */
                a_band->bitrates = ipw2200_a_rates;
                a_band->n_bitrates = ipw2200_num_a_rates;

                wdev->wiphy->bands[NL80211_BAND_5GHZ] = a_band;
        }

        wdev->wiphy->cipher_suites = ipw_cipher_suites;
        wdev->wiphy->n_cipher_suites = ARRAY_SIZE(ipw_cipher_suites);

        set_wiphy_dev(wdev->wiphy, &priv->pci_dev->dev);

        /* With that information in place, we can now register the wiphy... */
        if (wiphy_register(wdev->wiphy))
                rc = -EIO;
out:
        return rc;
}

/* PCI driver stuff */
static const struct pci_device_id card_ids[] = {
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2701, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2702, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2711, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2712, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2721, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2722, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2731, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2732, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2741, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x103c, 0x2741, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2742, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2751, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2752, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2753, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2754, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2761, 0, 0, 0},
        {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2762, 0, 0, 0},
        {PCI_VDEVICE(INTEL, 0x104f), 0},
        {PCI_VDEVICE(INTEL, 0x4220), 0},        /* BG */
        {PCI_VDEVICE(INTEL, 0x4221), 0},        /* BG */
        {PCI_VDEVICE(INTEL, 0x4223), 0},        /* ABG */
        {PCI_VDEVICE(INTEL, 0x4224), 0},        /* ABG */

        /* required last entry */
        {0,}
};

MODULE_DEVICE_TABLE(pci, card_ids);

static struct attribute *ipw_sysfs_entries[] = {
        &dev_attr_rf_kill.attr,
        &dev_attr_direct_dword.attr,
        &dev_attr_indirect_byte.attr,
        &dev_attr_indirect_dword.attr,
        &dev_attr_mem_gpio_reg.attr,
        &dev_attr_command_event_reg.attr,
        &dev_attr_nic_type.attr,
        &dev_attr_status.attr,
        &dev_attr_cfg.attr,
        &dev_attr_error.attr,
        &dev_attr_event_log.attr,
        &dev_attr_cmd_log.attr,
        &dev_attr_eeprom_delay.attr,
        &dev_attr_ucode_version.attr,
        &dev_attr_rtc.attr,
        &dev_attr_scan_age.attr,
        &dev_attr_led.attr,
        &dev_attr_speed_scan.attr,
        &dev_attr_net_stats.attr,
        &dev_attr_channels.attr,
#ifdef CONFIG_IPW2200_PROMISCUOUS
        &dev_attr_rtap_iface.attr,
        &dev_attr_rtap_filter.attr,
#endif
        NULL
};

static struct attribute_group ipw_attribute_group = {
        .name = NULL,           /* put in device directory */
        .attrs = ipw_sysfs_entries,
};

#ifdef CONFIG_IPW2200_PROMISCUOUS
static int ipw_prom_open(struct net_device *dev)
{
        struct ipw_prom_priv *prom_priv = libipw_priv(dev);
        struct ipw_priv *priv = prom_priv->priv;

        IPW_DEBUG_INFO("prom dev->open\n");
        netif_carrier_off(dev);

        if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
                priv->sys_config.accept_all_data_frames = 1;
                priv->sys_config.accept_non_directed_frames = 1;
                priv->sys_config.accept_all_mgmt_bcpr = 1;
                priv->sys_config.accept_all_mgmt_frames = 1;

                ipw_send_system_config(priv);
        }

        return 0;
}

static int ipw_prom_stop(struct net_device *dev)
{
        struct ipw_prom_priv *prom_priv = libipw_priv(dev);
        struct ipw_priv *priv = prom_priv->priv;

        IPW_DEBUG_INFO("prom dev->stop\n");

        if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
                priv->sys_config.accept_all_data_frames = 0;
                priv->sys_config.accept_non_directed_frames = 0;
                priv->sys_config.accept_all_mgmt_bcpr = 0;
                priv->sys_config.accept_all_mgmt_frames = 0;

                ipw_send_system_config(priv);
        }

        return 0;
}

static netdev_tx_t ipw_prom_hard_start_xmit(struct sk_buff *skb,
                                            struct net_device *dev)
{
        IPW_DEBUG_INFO("prom dev->xmit\n");
        dev_kfree_skb(skb);
        return NETDEV_TX_OK;
}

static const struct net_device_ops ipw_prom_netdev_ops = {
        .ndo_open               = ipw_prom_open,
        .ndo_stop               = ipw_prom_stop,
        .ndo_start_xmit         = ipw_prom_hard_start_xmit,
        .ndo_set_mac_address    = eth_mac_addr,
        .ndo_validate_addr      = eth_validate_addr,
};

static int ipw_prom_alloc(struct ipw_priv *priv)
{
        int rc = 0;

        if (priv->prom_net_dev)
                return -EPERM;

        priv->prom_net_dev = alloc_libipw(sizeof(struct ipw_prom_priv), 1);
        if (priv->prom_net_dev == NULL)
                return -ENOMEM;

        priv->prom_priv = libipw_priv(priv->prom_net_dev);
        priv->prom_priv->ieee = netdev_priv(priv->prom_net_dev);
        priv->prom_priv->priv = priv;

        strcpy(priv->prom_net_dev->name, "rtap%d");
        memcpy(priv->prom_net_dev->dev_addr, priv->mac_addr, ETH_ALEN);

        priv->prom_net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
        priv->prom_net_dev->netdev_ops = &ipw_prom_netdev_ops;

        priv->prom_net_dev->min_mtu = 68;
        priv->prom_net_dev->max_mtu = LIBIPW_DATA_LEN;

        priv->prom_priv->ieee->iw_mode = IW_MODE_MONITOR;
        SET_NETDEV_DEV(priv->prom_net_dev, &priv->pci_dev->dev);

        rc = register_netdev(priv->prom_net_dev);
        if (rc) {
                free_libipw(priv->prom_net_dev, 1);
                priv->prom_net_dev = NULL;
                return rc;
        }

        return 0;
}

static void ipw_prom_free(struct ipw_priv *priv)
{
        if (!priv->prom_net_dev)
                return;

        unregister_netdev(priv->prom_net_dev);
        free_libipw(priv->prom_net_dev, 1);

        priv->prom_net_dev = NULL;
}

#endif

static const struct net_device_ops ipw_netdev_ops = {
        .ndo_open               = ipw_net_open,
        .ndo_stop               = ipw_net_stop,
        .ndo_set_rx_mode        = ipw_net_set_multicast_list,
        .ndo_set_mac_address    = ipw_net_set_mac_address,
        .ndo_start_xmit         = libipw_xmit,
        .ndo_validate_addr      = eth_validate_addr,
};

static int ipw_pci_probe(struct pci_dev *pdev,
                                   const struct pci_device_id *ent)
{
        int err = 0;
        struct net_device *net_dev;
        void __iomem *base;
        u32 length, val;
        struct ipw_priv *priv;
        int i;

        net_dev = alloc_libipw(sizeof(struct ipw_priv), 0);
        if (net_dev == NULL) {
                err = -ENOMEM;
                goto out;
        }

        priv = libipw_priv(net_dev);
        priv->ieee = netdev_priv(net_dev);

        priv->net_dev = net_dev;
        priv->pci_dev = pdev;
        ipw_debug_level = debug;
        spin_lock_init(&priv->irq_lock);
        spin_lock_init(&priv->lock);
        for (i = 0; i < IPW_IBSS_MAC_HASH_SIZE; i++)
                INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);

        mutex_init(&priv->mutex);
        if (pci_enable_device(pdev)) {
                err = -ENODEV;
                goto out_free_libipw;
        }

        pci_set_master(pdev);

        err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
        if (!err)
                err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
        if (err) {
                printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
                goto out_pci_disable_device;
        }

        pci_set_drvdata(pdev, priv);

        err = pci_request_regions(pdev, DRV_NAME);
        if (err)
                goto out_pci_disable_device;

        /* We disable the RETRY_TIMEOUT register (0x41) to keep
         * PCI Tx retries from interfering with C3 CPU state */
        pci_read_config_dword(pdev, 0x40, &val);
        if ((val & 0x0000ff00) != 0)
                pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);

        length = pci_resource_len(pdev, 0);
        priv->hw_len = length;

        base = pci_ioremap_bar(pdev, 0);
        if (!base) {
                err = -ENODEV;
                goto out_pci_release_regions;
        }

        priv->hw_base = base;
        IPW_DEBUG_INFO("pci_resource_len = 0x%08x\n", length);
        IPW_DEBUG_INFO("pci_resource_base = %p\n", base);

        err = ipw_setup_deferred_work(priv);
        if (err) {
                IPW_ERROR("Unable to setup deferred work\n");
                goto out_iounmap;
        }

        ipw_sw_reset(priv, 1);

        err = request_irq(pdev->irq, ipw_isr, IRQF_SHARED, DRV_NAME, priv);
        if (err) {
                IPW_ERROR("Error allocating IRQ %d\n", pdev->irq);
                goto out_iounmap;
        }

        SET_NETDEV_DEV(net_dev, &pdev->dev);

        mutex_lock(&priv->mutex);

        priv->ieee->hard_start_xmit = ipw_net_hard_start_xmit;
        priv->ieee->set_security = shim__set_security;
        priv->ieee->is_queue_full = ipw_net_is_queue_full;

#ifdef CONFIG_IPW2200_QOS
        priv->ieee->is_qos_active = ipw_is_qos_active;
        priv->ieee->handle_probe_response = ipw_handle_beacon;
        priv->ieee->handle_beacon = ipw_handle_probe_response;
        priv->ieee->handle_assoc_response = ipw_handle_assoc_response;
#endif                          /* CONFIG_IPW2200_QOS */

        priv->ieee->perfect_rssi = -20;
        priv->ieee->worst_rssi = -85;

        net_dev->netdev_ops = &ipw_netdev_ops;
        priv->wireless_data.spy_data = &priv->ieee->spy_data;
        net_dev->wireless_data = &priv->wireless_data;
        net_dev->wireless_handlers = &ipw_wx_handler_def;
        net_dev->ethtool_ops = &ipw_ethtool_ops;

        net_dev->min_mtu = 68;
        net_dev->max_mtu = LIBIPW_DATA_LEN;

        err = sysfs_create_group(&pdev->dev.kobj, &ipw_attribute_group);
        if (err) {
                IPW_ERROR("failed to create sysfs device attributes\n");
                mutex_unlock(&priv->mutex);
                goto out_release_irq;
        }

        if (ipw_up(priv)) {
                mutex_unlock(&priv->mutex);
                err = -EIO;
                goto out_remove_sysfs;
        }

        mutex_unlock(&priv->mutex);

        err = ipw_wdev_init(net_dev);
        if (err) {
                IPW_ERROR("failed to register wireless device\n");
                goto out_remove_sysfs;
        }

        err = register_netdev(net_dev);
        if (err) {
                IPW_ERROR("failed to register network device\n");
                goto out_unregister_wiphy;
        }

#ifdef CONFIG_IPW2200_PROMISCUOUS
        if (rtap_iface) {
                err = ipw_prom_alloc(priv);
                if (err) {
                        IPW_ERROR("Failed to register promiscuous network "
                                  "device (error %d).\n", err);
                        unregister_netdev(priv->net_dev);
                        goto out_unregister_wiphy;
                }
        }
#endif

        printk(KERN_INFO DRV_NAME ": Detected geography %s (%d 802.11bg "
               "channels, %d 802.11a channels)\n",
               priv->ieee->geo.name, priv->ieee->geo.bg_channels,
               priv->ieee->geo.a_channels);

        return 0;

      out_unregister_wiphy:
        wiphy_unregister(priv->ieee->wdev.wiphy);
        kfree(priv->ieee->a_band.channels);
        kfree(priv->ieee->bg_band.channels);
      out_remove_sysfs:
        sysfs_remove_group(&pdev->dev.kobj, &ipw_attribute_group);
      out_release_irq:
        free_irq(pdev->irq, priv);
      out_iounmap:
        iounmap(priv->hw_base);
      out_pci_release_regions:
        pci_release_regions(pdev);
      out_pci_disable_device:
        pci_disable_device(pdev);
      out_free_libipw:
        free_libipw(priv->net_dev, 0);
      out:
        return err;
}

static void ipw_pci_remove(struct pci_dev *pdev)
{
        struct ipw_priv *priv = pci_get_drvdata(pdev);
        struct list_head *p, *q;
        int i;

        if (!priv)
                return;

        mutex_lock(&priv->mutex);

        priv->status |= STATUS_EXIT_PENDING;
        ipw_down(priv);
        sysfs_remove_group(&pdev->dev.kobj, &ipw_attribute_group);

        mutex_unlock(&priv->mutex);

        unregister_netdev(priv->net_dev);

        if (priv->rxq) {
                ipw_rx_queue_free(priv, priv->rxq);
                priv->rxq = NULL;
        }
        ipw_tx_queue_free(priv);

        if (priv->cmdlog) {
                kfree(priv->cmdlog);
                priv->cmdlog = NULL;
        }

        /* make sure all works are inactive */
        cancel_delayed_work_sync(&priv->adhoc_check);
        cancel_work_sync(&priv->associate);
        cancel_work_sync(&priv->disassociate);
        cancel_work_sync(&priv->system_config);
        cancel_work_sync(&priv->rx_replenish);
        cancel_work_sync(&priv->adapter_restart);
        cancel_delayed_work_sync(&priv->rf_kill);
        cancel_work_sync(&priv->up);
        cancel_work_sync(&priv->down);
        cancel_delayed_work_sync(&priv->request_scan);
        cancel_delayed_work_sync(&priv->request_direct_scan);
        cancel_delayed_work_sync(&priv->request_passive_scan);
        cancel_delayed_work_sync(&priv->scan_event);
        cancel_delayed_work_sync(&priv->gather_stats);
        cancel_work_sync(&priv->abort_scan);
        cancel_work_sync(&priv->roam);
        cancel_delayed_work_sync(&priv->scan_check);
        cancel_work_sync(&priv->link_up);
        cancel_work_sync(&priv->link_down);
        cancel_delayed_work_sync(&priv->led_link_on);
        cancel_delayed_work_sync(&priv->led_link_off);
        cancel_delayed_work_sync(&priv->led_act_off);
        cancel_work_sync(&priv->merge_networks);

        /* Free MAC hash list for ADHOC */
        for (i = 0; i < IPW_IBSS_MAC_HASH_SIZE; i++) {
                list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
                        list_del(p);
                        kfree(list_entry(p, struct ipw_ibss_seq, list));
                }
        }

        kfree(priv->error);
        priv->error = NULL;

#ifdef CONFIG_IPW2200_PROMISCUOUS
        ipw_prom_free(priv);
#endif

        free_irq(pdev->irq, priv);
        iounmap(priv->hw_base);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
        /* wiphy_unregister needs to be here, before free_libipw */
        wiphy_unregister(priv->ieee->wdev.wiphy);
        kfree(priv->ieee->a_band.channels);
        kfree(priv->ieee->bg_band.channels);
        free_libipw(priv->net_dev, 0);
        free_firmware();
}

#ifdef CONFIG_PM
static int ipw_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
        struct ipw_priv *priv = pci_get_drvdata(pdev);
        struct net_device *dev = priv->net_dev;

        printk(KERN_INFO "%s: Going into suspend...\n", dev->name);

        /* Take down the device; powers it off, etc. */
        ipw_down(priv);

        /* Remove the PRESENT state of the device */
        netif_device_detach(dev);

        pci_save_state(pdev);
        pci_disable_device(pdev);
        pci_set_power_state(pdev, pci_choose_state(pdev, state));

        priv->suspend_at = get_seconds();

        return 0;
}

static int ipw_pci_resume(struct pci_dev *pdev)
{
        struct ipw_priv *priv = pci_get_drvdata(pdev);
        struct net_device *dev = priv->net_dev;
        int err;
        u32 val;

        printk(KERN_INFO "%s: Coming out of suspend...\n", dev->name);

        pci_set_power_state(pdev, PCI_D0);
        err = pci_enable_device(pdev);
        if (err) {
                printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
                       dev->name);
                return err;
        }
        pci_restore_state(pdev);

        /*
         * Suspend/Resume resets the PCI configuration space, so we have to
         * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
         * from interfering with C3 CPU state. pci_restore_state won't help
         * here since it only restores the first 64 bytes pci config header.
         */
        pci_read_config_dword(pdev, 0x40, &val);
        if ((val & 0x0000ff00) != 0)
                pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);

        /* Set the device back into the PRESENT state; this will also wake
         * the queue of needed */
        netif_device_attach(dev);

        priv->suspend_time = get_seconds() - priv->suspend_at;

        /* Bring the device back up */
        schedule_work(&priv->up);

        return 0;
}
#endif

static void ipw_pci_shutdown(struct pci_dev *pdev)
{
        struct ipw_priv *priv = pci_get_drvdata(pdev);

        /* Take down the device; powers it off, etc. */
        ipw_down(priv);

        pci_disable_device(pdev);
}

/* driver initialization stuff */
static struct pci_driver ipw_driver = {
        .name = DRV_NAME,
        .id_table = card_ids,
        .probe = ipw_pci_probe,
        .remove = ipw_pci_remove,
#ifdef CONFIG_PM
        .suspend = ipw_pci_suspend,
        .resume = ipw_pci_resume,
#endif
        .shutdown = ipw_pci_shutdown,
};

static int __init ipw_init(void)
{
        int ret;

        printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
        printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");

        ret = pci_register_driver(&ipw_driver);
        if (ret) {
                IPW_ERROR("Unable to initialize PCI module\n");
                return ret;
        }

        ret = driver_create_file(&ipw_driver.driver, &driver_attr_debug_level);
        if (ret) {
                IPW_ERROR("Unable to create driver sysfs file\n");
                pci_unregister_driver(&ipw_driver);
                return ret;
        }

        return ret;
}

static void __exit ipw_exit(void)
{
        driver_remove_file(&ipw_driver.driver, &driver_attr_debug_level);
        pci_unregister_driver(&ipw_driver);
}

module_param(disable, int, 0444);
MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");

module_param(associate, int, 0444);
MODULE_PARM_DESC(associate, "auto associate when scanning (default off)");

module_param(auto_create, int, 0444);
MODULE_PARM_DESC(auto_create, "auto create adhoc network (default on)");

module_param_named(led, led_support, int, 0444);
MODULE_PARM_DESC(led, "enable led control on some systems (default 1 on)");

module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");

module_param_named(channel, default_channel, int, 0444);
MODULE_PARM_DESC(channel, "channel to limit associate to (default 0 [ANY])");

#ifdef CONFIG_IPW2200_PROMISCUOUS
module_param(rtap_iface, int, 0444);
MODULE_PARM_DESC(rtap_iface, "create the rtap interface (1 - create, default 0)");
#endif

#ifdef CONFIG_IPW2200_QOS
module_param(qos_enable, int, 0444);
MODULE_PARM_DESC(qos_enable, "enable all QoS functionalitis");

module_param(qos_burst_enable, int, 0444);
MODULE_PARM_DESC(qos_burst_enable, "enable QoS burst mode");

module_param(qos_no_ack_mask, int, 0444);
MODULE_PARM_DESC(qos_no_ack_mask, "mask Tx_Queue to no ack");

module_param(burst_duration_CCK, int, 0444);
MODULE_PARM_DESC(burst_duration_CCK, "set CCK burst value");

module_param(burst_duration_OFDM, int, 0444);
MODULE_PARM_DESC(burst_duration_OFDM, "set OFDM burst value");
#endif                          /* CONFIG_IPW2200_QOS */

#ifdef CONFIG_IPW2200_MONITOR
module_param_named(mode, network_mode, int, 0444);
MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS,2=Monitor)");
#else
module_param_named(mode, network_mode, int, 0444);
MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS)");
#endif

module_param(bt_coexist, int, 0444);
MODULE_PARM_DESC(bt_coexist, "enable bluetooth coexistence (default off)");

module_param(hwcrypto, int, 0444);
MODULE_PARM_DESC(hwcrypto, "enable hardware crypto (default off)");

module_param(cmdlog, int, 0444);
MODULE_PARM_DESC(cmdlog,
                 "allocate a ring buffer for logging firmware commands");

module_param(roaming, int, 0444);
MODULE_PARM_DESC(roaming, "enable roaming support (default on)");

module_param(antenna, int, 0444);
MODULE_PARM_DESC(antenna, "select antenna 1=Main, 3=Aux, default 0 [both], 2=slow_diversity (choose the one with lower background noise)");

module_exit(ipw_exit);
module_init(ipw_init);