iwl3945: Remaining host command cleanups

[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / iwlwifi / iwl-core.c

/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <net/mac80211.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h" /* FIXME: remove */
#include "iwl-debug.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-rfkill.h"
#include "iwl-power.h"
#include "iwl-sta.h"


MODULE_DESCRIPTION("iwl core");
MODULE_VERSION(IWLWIFI_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");

#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
        [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
                                    IWL_RATE_SISO_##s##M_PLCP, \
                                    IWL_RATE_MIMO2_##s##M_PLCP,\
                                    IWL_RATE_MIMO3_##s##M_PLCP,\
                                    IWL_RATE_##r##M_IEEE,      \
                                    IWL_RATE_##ip##M_INDEX,    \
                                    IWL_RATE_##in##M_INDEX,    \
                                    IWL_RATE_##rp##M_INDEX,    \
                                    IWL_RATE_##rn##M_INDEX,    \
                                    IWL_RATE_##pp##M_INDEX,    \
                                    IWL_RATE_##np##M_INDEX }

/*
 * Parameter order:
 *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 *
 * If there isn't a valid next or previous rate then INV is used which
 * maps to IWL_RATE_INVALID
 *
 */
const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
        IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
        IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
        IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
        IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
        IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
        IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
        IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
        IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
        IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
        IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
        IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
        IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
        IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
        /* FIXME:RS:          ^^    should be INV (legacy) */
};
EXPORT_SYMBOL(iwl_rates);

/**
 * translate ucode response to mac80211 tx status control values
 */
void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
                                  struct ieee80211_tx_info *info)
{
        int rate_index;
        struct ieee80211_tx_rate *r = &info->control.rates[0];

        info->antenna_sel_tx =
                ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
        if (rate_n_flags & RATE_MCS_HT_MSK)
                r->flags |= IEEE80211_TX_RC_MCS;
        if (rate_n_flags & RATE_MCS_GF_MSK)
                r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
        if (rate_n_flags & RATE_MCS_FAT_MSK)
                r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
        if (rate_n_flags & RATE_MCS_DUP_MSK)
                r->flags |= IEEE80211_TX_RC_DUP_DATA;
        if (rate_n_flags & RATE_MCS_SGI_MSK)
                r->flags |= IEEE80211_TX_RC_SHORT_GI;
        rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
        if (info->band == IEEE80211_BAND_5GHZ)
                rate_index -= IWL_FIRST_OFDM_RATE;
        r->idx = rate_index;
}
EXPORT_SYMBOL(iwl_hwrate_to_tx_control);

int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
{
        int idx = 0;

        /* HT rate format */
        if (rate_n_flags & RATE_MCS_HT_MSK) {
                idx = (rate_n_flags & 0xff);

                if (idx >= IWL_RATE_MIMO3_6M_PLCP)
                        idx = idx - IWL_RATE_MIMO3_6M_PLCP;
                else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
                        idx = idx - IWL_RATE_MIMO2_6M_PLCP;

                idx += IWL_FIRST_OFDM_RATE;
                /* skip 9M not supported in ht*/
                if (idx >= IWL_RATE_9M_INDEX)
                        idx += 1;
                if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
                        return idx;

        /* legacy rate format, search for match in table */
        } else {
                for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
                        if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
                                return idx;
        }

        return -1;
}
EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);

u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
{
        int i;
        u8 ind = ant;
        for (i = 0; i < RATE_ANT_NUM - 1; i++) {
                ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
                if (priv->hw_params.valid_tx_ant & BIT(ind))
                        return ind;
        }
        return ant;
}

const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
EXPORT_SYMBOL(iwl_bcast_addr);


/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
                struct ieee80211_ops *hw_ops)
{
        struct iwl_priv *priv;

        /* mac80211 allocates memory for this device instance, including
         *   space for this driver's private structure */
        struct ieee80211_hw *hw =
                ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
        if (hw == NULL) {
                printk(KERN_ERR "%s: Can not allocate network device\n",
                       cfg->name);
                goto out;
        }

        priv = hw->priv;
        priv->hw = hw;

out:
        return hw;
}
EXPORT_SYMBOL(iwl_alloc_all);

void iwl_hw_detect(struct iwl_priv *priv)
{
        priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
        priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
        pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
}
EXPORT_SYMBOL(iwl_hw_detect);

int iwl_hw_nic_init(struct iwl_priv *priv)
{
        unsigned long flags;
        struct iwl_rx_queue *rxq = &priv->rxq;
        int ret;

        /* nic_init */
        spin_lock_irqsave(&priv->lock, flags);
        priv->cfg->ops->lib->apm_ops.init(priv);
        iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
        spin_unlock_irqrestore(&priv->lock, flags);

        ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);

        priv->cfg->ops->lib->apm_ops.config(priv);

        /* Allocate the RX queue, or reset if it is already allocated */
        if (!rxq->bd) {
                ret = iwl_rx_queue_alloc(priv);
                if (ret) {
                        IWL_ERR(priv, "Unable to initialize Rx queue\n");
                        return -ENOMEM;
                }
        } else
                iwl_rx_queue_reset(priv, rxq);

        iwl_rx_replenish(priv);

        iwl_rx_init(priv, rxq);

        spin_lock_irqsave(&priv->lock, flags);

        rxq->need_update = 1;
        iwl_rx_queue_update_write_ptr(priv, rxq);

        spin_unlock_irqrestore(&priv->lock, flags);

        /* Allocate and init all Tx and Command queues */
        ret = iwl_txq_ctx_reset(priv);
        if (ret)
                return ret;

        set_bit(STATUS_INIT, &priv->status);

        return 0;
}
EXPORT_SYMBOL(iwl_hw_nic_init);

void iwl_reset_qos(struct iwl_priv *priv)
{
        u16 cw_min = 15;
        u16 cw_max = 1023;
        u8 aifs = 2;
        bool is_legacy = false;
        unsigned long flags;
        int i;

        spin_lock_irqsave(&priv->lock, flags);
        /* QoS always active in AP and ADHOC mode
         * In STA mode wait for association
         */
        if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
            priv->iw_mode == NL80211_IFTYPE_AP)
                priv->qos_data.qos_active = 1;
        else
                priv->qos_data.qos_active = 0;

        /* check for legacy mode */
        if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
            (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
            (priv->iw_mode == NL80211_IFTYPE_STATION &&
            (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
                cw_min = 31;
                is_legacy = 1;
        }

        if (priv->qos_data.qos_active)
                aifs = 3;

        priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
        priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
        priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
        priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
        priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;

        if (priv->qos_data.qos_active) {
                i = 1;
                priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
                priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
                priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
                priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
                priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

                i = 2;
                priv->qos_data.def_qos_parm.ac[i].cw_min =
                        cpu_to_le16((cw_min + 1) / 2 - 1);
                priv->qos_data.def_qos_parm.ac[i].cw_max =
                        cpu_to_le16(cw_max);
                priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
                if (is_legacy)
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(6016);
                else
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(3008);
                priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

                i = 3;
                priv->qos_data.def_qos_parm.ac[i].cw_min =
                        cpu_to_le16((cw_min + 1) / 4 - 1);
                priv->qos_data.def_qos_parm.ac[i].cw_max =
                        cpu_to_le16((cw_max + 1) / 2 - 1);
                priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
                priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
                if (is_legacy)
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(3264);
                else
                        priv->qos_data.def_qos_parm.ac[i].edca_txop =
                                cpu_to_le16(1504);
        } else {
                for (i = 1; i < 4; i++) {
                        priv->qos_data.def_qos_parm.ac[i].cw_min =
                                cpu_to_le16(cw_min);
                        priv->qos_data.def_qos_parm.ac[i].cw_max =
                                cpu_to_le16(cw_max);
                        priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
                        priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
                        priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
                }
        }
        IWL_DEBUG_QOS("set QoS to default \n");

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

#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
                              struct ieee80211_sta_ht_cap *ht_info,
                              enum ieee80211_band band)
{
        u16 max_bit_rate = 0;
        u8 rx_chains_num = priv->hw_params.rx_chains_num;
        u8 tx_chains_num = priv->hw_params.tx_chains_num;

        ht_info->cap = 0;
        memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));

        ht_info->ht_supported = true;

        ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
        ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
        ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
                             (WLAN_HT_CAP_SM_PS_DISABLED << 2));

        max_bit_rate = MAX_BIT_RATE_20_MHZ;
        if (priv->hw_params.fat_channel & BIT(band)) {
                ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
                ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
                ht_info->mcs.rx_mask[4] = 0x01;
                max_bit_rate = MAX_BIT_RATE_40_MHZ;
        }

        if (priv->cfg->mod_params->amsdu_size_8K)
                ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;

        ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
        ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;

        ht_info->mcs.rx_mask[0] = 0xFF;
        if (rx_chains_num >= 2)
                ht_info->mcs.rx_mask[1] = 0xFF;
        if (rx_chains_num >= 3)
                ht_info->mcs.rx_mask[2] = 0xFF;

        /* Highest supported Rx data rate */
        max_bit_rate *= rx_chains_num;
        WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
        ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);

        /* Tx MCS capabilities */
        ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
        if (tx_chains_num != rx_chains_num) {
                ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
                ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
                                IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
        }
}

static void iwlcore_init_hw_rates(struct iwl_priv *priv,
                              struct ieee80211_rate *rates)
{
        int i;

        for (i = 0; i < IWL_RATE_COUNT; i++) {
                rates[i].bitrate = iwl_rates[i].ieee * 5;
                rates[i].hw_value = i; /* Rate scaling will work on indexes */
                rates[i].hw_value_short = i;
                rates[i].flags = 0;
                if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
                        /*
                         * If CCK != 1M then set short preamble rate flag.
                         */
                        rates[i].flags |=
                                (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
                                        0 : IEEE80211_RATE_SHORT_PREAMBLE;
                }
        }
}

/**
 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 */
int iwlcore_init_geos(struct iwl_priv *priv)
{
        struct iwl_channel_info *ch;
        struct ieee80211_supported_band *sband;
        struct ieee80211_channel *channels;
        struct ieee80211_channel *geo_ch;
        struct ieee80211_rate *rates;
        int i = 0;

        if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
            priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
                IWL_DEBUG_INFO("Geography modes already initialized.\n");
                set_bit(STATUS_GEO_CONFIGURED, &priv->status);
                return 0;
        }

        channels = kzalloc(sizeof(struct ieee80211_channel) *
                           priv->channel_count, GFP_KERNEL);
        if (!channels)
                return -ENOMEM;

        rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
                        GFP_KERNEL);
        if (!rates) {
                kfree(channels);
                return -ENOMEM;
        }

        /* 5.2GHz channels start after the 2.4GHz channels */
        sband = &priv->bands[IEEE80211_BAND_5GHZ];
        sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
        /* just OFDM */
        sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
        sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;

        if (priv->cfg->sku & IWL_SKU_N)
                iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
                                         IEEE80211_BAND_5GHZ);

        sband = &priv->bands[IEEE80211_BAND_2GHZ];
        sband->channels = channels;
        /* OFDM & CCK */
        sband->bitrates = rates;
        sband->n_bitrates = IWL_RATE_COUNT;

        if (priv->cfg->sku & IWL_SKU_N)
                iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
                                         IEEE80211_BAND_2GHZ);

        priv->ieee_channels = channels;
        priv->ieee_rates = rates;

        for (i = 0;  i < priv->channel_count; i++) {
                ch = &priv->channel_info[i];

                /* FIXME: might be removed if scan is OK */
                if (!is_channel_valid(ch))
                        continue;

                if (is_channel_a_band(ch))
                        sband =  &priv->bands[IEEE80211_BAND_5GHZ];
                else
                        sband =  &priv->bands[IEEE80211_BAND_2GHZ];

                geo_ch = &sband->channels[sband->n_channels++];

                geo_ch->center_freq =
                                ieee80211_channel_to_frequency(ch->channel);
                geo_ch->max_power = ch->max_power_avg;
                geo_ch->max_antenna_gain = 0xff;
                geo_ch->hw_value = ch->channel;

                if (is_channel_valid(ch)) {
                        if (!(ch->flags & EEPROM_CHANNEL_IBSS))
                                geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;

                        if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
                                geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;

                        if (ch->flags & EEPROM_CHANNEL_RADAR)
                                geo_ch->flags |= IEEE80211_CHAN_RADAR;

                        geo_ch->flags |= ch->fat_extension_channel;

                        if (ch->max_power_avg > priv->tx_power_channel_lmt)
                                priv->tx_power_channel_lmt = ch->max_power_avg;
                } else {
                        geo_ch->flags |= IEEE80211_CHAN_DISABLED;
                }

                /* Save flags for reg domain usage */
                geo_ch->orig_flags = geo_ch->flags;

                IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
                                ch->channel, geo_ch->center_freq,
                                is_channel_a_band(ch) ?  "5.2" : "2.4",
                                geo_ch->flags & IEEE80211_CHAN_DISABLED ?
                                "restricted" : "valid",
                                 geo_ch->flags);
        }

        if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
             priv->cfg->sku & IWL_SKU_A) {
                IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
                        "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
                           priv->pci_dev->device,
                           priv->pci_dev->subsystem_device);
                priv->cfg->sku &= ~IWL_SKU_A;
        }

        IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
                   priv->bands[IEEE80211_BAND_2GHZ].n_channels,
                   priv->bands[IEEE80211_BAND_5GHZ].n_channels);

        set_bit(STATUS_GEO_CONFIGURED, &priv->status);

        return 0;
}
EXPORT_SYMBOL(iwlcore_init_geos);

/*
 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 */
void iwlcore_free_geos(struct iwl_priv *priv)
{
        kfree(priv->ieee_channels);
        kfree(priv->ieee_rates);
        clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
EXPORT_SYMBOL(iwlcore_free_geos);

static bool is_single_rx_stream(struct iwl_priv *priv)
{
        return !priv->current_ht_config.is_ht ||
               ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
                (priv->current_ht_config.mcs.rx_mask[2] == 0));
}

static u8 iwl_is_channel_extension(struct iwl_priv *priv,
                                   enum ieee80211_band band,
                                   u16 channel, u8 extension_chan_offset)
{
        const struct iwl_channel_info *ch_info;

        ch_info = iwl_get_channel_info(priv, band, channel);
        if (!is_channel_valid(ch_info))
                return 0;

        if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
                return !(ch_info->fat_extension_channel &
                                        IEEE80211_CHAN_NO_FAT_ABOVE);
        else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
                return !(ch_info->fat_extension_channel &
                                        IEEE80211_CHAN_NO_FAT_BELOW);

        return 0;
}

u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
                         struct ieee80211_sta_ht_cap *sta_ht_inf)
{
        struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;

        if ((!iwl_ht_conf->is_ht) ||
           (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
           (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE))
                return 0;

        if (sta_ht_inf) {
                if ((!sta_ht_inf->ht_supported) ||
                   (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)))
                        return 0;
        }

        return iwl_is_channel_extension(priv, priv->band,
                                        le16_to_cpu(priv->staging_rxon.channel),
                                        iwl_ht_conf->extension_chan_offset);
}
EXPORT_SYMBOL(iwl_is_fat_tx_allowed);

void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
{
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
        u32 val;

        if (!ht_info->is_ht) {
                rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
                        RXON_FLG_CHANNEL_MODE_PURE_40_MSK |
                        RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
                        RXON_FLG_FAT_PROT_MSK |
                        RXON_FLG_HT_PROT_MSK);
                return;
        }

        /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
        if (iwl_is_fat_tx_allowed(priv, NULL))
                rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
        else
                rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
                                 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);

        /* Note: control channel is opposite of extension channel */
        switch (ht_info->extension_chan_offset) {
        case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
                rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
                break;
        case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
                rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
                break;
        case IEEE80211_HT_PARAM_CHA_SEC_NONE:
        default:
                rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
                break;
        }

        val = ht_info->ht_protection;

        rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);

        iwl_set_rxon_chain(priv);

        IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
                        "rxon flags 0x%X operation mode :0x%X "
                        "extension channel offset 0x%x\n",
                        ht_info->mcs.rx_mask[0],
                        ht_info->mcs.rx_mask[1],
                        ht_info->mcs.rx_mask[2],
                        le32_to_cpu(rxon->flags), ht_info->ht_protection,
                        ht_info->extension_chan_offset);
        return;
}
EXPORT_SYMBOL(iwl_set_rxon_ht);

#define IWL_NUM_RX_CHAINS_MULTIPLE      3
#define IWL_NUM_RX_CHAINS_SINGLE        2
#define IWL_NUM_IDLE_CHAINS_DUAL        2
#define IWL_NUM_IDLE_CHAINS_SINGLE      1

/* Determine how many receiver/antenna chains to use.
 * More provides better reception via diversity.  Fewer saves power.
 * MIMO (dual stream) requires at least 2, but works better with 3.
 * This does not determine *which* chains to use, just how many.
 */
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
{
        bool is_single = is_single_rx_stream(priv);
        bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);

        /* # of Rx chains to use when expecting MIMO. */
        if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
                                                 WLAN_HT_CAP_SM_PS_STATIC)))
                return IWL_NUM_RX_CHAINS_SINGLE;
        else
                return IWL_NUM_RX_CHAINS_MULTIPLE;
}

static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
        int idle_cnt;
        bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
        /* # Rx chains when idling and maybe trying to save power */
        switch (priv->current_ht_config.sm_ps) {
        case WLAN_HT_CAP_SM_PS_STATIC:
        case WLAN_HT_CAP_SM_PS_DYNAMIC:
                idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
                                        IWL_NUM_IDLE_CHAINS_SINGLE;
                break;
        case WLAN_HT_CAP_SM_PS_DISABLED:
                idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
                break;
        case WLAN_HT_CAP_SM_PS_INVALID:
        default:
                IWL_ERR(priv, "invalid mimo ps mode %d\n",
                           priv->current_ht_config.sm_ps);
                WARN_ON(1);
                idle_cnt = -1;
                break;
        }
        return idle_cnt;
}

/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
        u8 res;
        res = (chain_bitmap & BIT(0)) >> 0;
        res += (chain_bitmap & BIT(1)) >> 1;
        res += (chain_bitmap & BIT(2)) >> 2;
        res += (chain_bitmap & BIT(4)) >> 4;
        return res;
}

/**
 * iwl_is_monitor_mode - Determine if interface in monitor mode
 *
 * priv->iw_mode is set in add_interface, but add_interface is
 * never called for monitor mode. The only way mac80211 informs us about
 * monitor mode is through configuring filters (call to configure_filter).
 */
static bool iwl_is_monitor_mode(struct iwl_priv *priv)
{
        return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
}

/**
 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 *
 * Selects how many and which Rx receivers/antennas/chains to use.
 * This should not be used for scan command ... it puts data in wrong place.
 */
void iwl_set_rxon_chain(struct iwl_priv *priv)
{
        bool is_single = is_single_rx_stream(priv);
        bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
        u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
        u32 active_chains;
        u16 rx_chain;

        /* Tell uCode which antennas are actually connected.
         * Before first association, we assume all antennas are connected.
         * Just after first association, iwl_chain_noise_calibration()
         *    checks which antennas actually *are* connected. */
         if (priv->chain_noise_data.active_chains)
                active_chains = priv->chain_noise_data.active_chains;
        else
                active_chains = priv->hw_params.valid_rx_ant;

        rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;

        /* How many receivers should we use? */
        active_rx_cnt = iwl_get_active_rx_chain_count(priv);
        idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);


        /* correct rx chain count according hw settings
         * and chain noise calibration
         */
        valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
        if (valid_rx_cnt < active_rx_cnt)
                active_rx_cnt = valid_rx_cnt;

        if (valid_rx_cnt < idle_rx_cnt)
                idle_rx_cnt = valid_rx_cnt;

        rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
        rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;

        /* copied from 'iwl_bg_request_scan()' */
        /* Force use of chains B and C (0x6) for Rx for 4965
         * Avoid A (0x1) because of its off-channel reception on A-band.
         * MIMO is not used here, but value is required */
        if (iwl_is_monitor_mode(priv) &&
            !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
            ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
                rx_chain = 0x07 << RXON_RX_CHAIN_VALID_POS;
                rx_chain |= 0x06 << RXON_RX_CHAIN_FORCE_SEL_POS;
                rx_chain |= 0x07 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
                rx_chain |= 0x01 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
        }

        priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);

        if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
                priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
        else
                priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;

        IWL_DEBUG_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
                        priv->staging_rxon.rx_chain,
                        active_rx_cnt, idle_rx_cnt);

        WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
                active_rx_cnt < idle_rx_cnt);
}
EXPORT_SYMBOL(iwl_set_rxon_chain);

/**
 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 * @channel: Any channel valid for the requested phymode

 * In addition to setting the staging RXON, priv->phymode is also set.
 *
 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 * in the staging RXON flag structure based on the phymode
 */
int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
{
        enum ieee80211_band band = ch->band;
        u16 channel = ieee80211_frequency_to_channel(ch->center_freq);

        if (!iwl_get_channel_info(priv, band, channel)) {
                IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
                               channel, band);
                return -EINVAL;
        }

        if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
            (priv->band == band))
                return 0;

        priv->staging_rxon.channel = cpu_to_le16(channel);
        if (band == IEEE80211_BAND_5GHZ)
                priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
        else
                priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;

        priv->band = band;

        IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);

        return 0;
}
EXPORT_SYMBOL(iwl_set_rxon_channel);

int iwl_setup_mac(struct iwl_priv *priv)
{
        int ret;
        struct ieee80211_hw *hw = priv->hw;
        hw->rate_control_algorithm = "iwl-agn-rs";

        /* Tell mac80211 our characteristics */
        hw->flags = IEEE80211_HW_SIGNAL_DBM |
                    IEEE80211_HW_NOISE_DBM |
                    IEEE80211_HW_AMPDU_AGGREGATION |
                    IEEE80211_HW_SUPPORTS_PS;
        hw->wiphy->interface_modes =
                BIT(NL80211_IFTYPE_STATION) |
                BIT(NL80211_IFTYPE_ADHOC);

        hw->wiphy->custom_regulatory = true;

        /* Default value; 4 EDCA QOS priorities */
        hw->queues = 4;
        /* queues to support 11n aggregation */
        if (priv->cfg->sku & IWL_SKU_N)
                hw->ampdu_queues = priv->cfg->mod_params->num_of_ampdu_queues;

        hw->conf.beacon_int = 100;
        hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;

        if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
                priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
                        &priv->bands[IEEE80211_BAND_2GHZ];
        if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
                priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
                        &priv->bands[IEEE80211_BAND_5GHZ];

        ret = ieee80211_register_hw(priv->hw);
        if (ret) {
                IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
                return ret;
        }
        priv->mac80211_registered = 1;

        return 0;
}
EXPORT_SYMBOL(iwl_setup_mac);

int iwl_set_hw_params(struct iwl_priv *priv)
{
        priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
        priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
        priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
        if (priv->cfg->mod_params->amsdu_size_8K)
                priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
        else
                priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
        priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;

        if (priv->cfg->mod_params->disable_11n)
                priv->cfg->sku &= ~IWL_SKU_N;

        /* Device-specific setup */
        return priv->cfg->ops->lib->set_hw_params(priv);
}
EXPORT_SYMBOL(iwl_set_hw_params);

int iwl_init_drv(struct iwl_priv *priv)
{
        int ret;

        priv->ibss_beacon = NULL;

        spin_lock_init(&priv->lock);
        spin_lock_init(&priv->power_data.lock);
        spin_lock_init(&priv->sta_lock);
        spin_lock_init(&priv->hcmd_lock);

        INIT_LIST_HEAD(&priv->free_frames);

        mutex_init(&priv->mutex);

        /* Clear the driver's (not device's) station table */
        iwl_clear_stations_table(priv);

        priv->data_retry_limit = -1;
        priv->ieee_channels = NULL;
        priv->ieee_rates = NULL;
        priv->band = IEEE80211_BAND_2GHZ;

        priv->iw_mode = NL80211_IFTYPE_STATION;

        priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;

        /* Choose which receivers/antennas to use */
        iwl_set_rxon_chain(priv);
        iwl_init_scan_params(priv);

        iwl_reset_qos(priv);

        priv->qos_data.qos_active = 0;
        priv->qos_data.qos_cap.val = 0;

        priv->rates_mask = IWL_RATES_MASK;
        /* If power management is turned on, default to AC mode */
        priv->power_mode = IWL_POWER_AC;
        priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;

        ret = iwl_init_channel_map(priv);
        if (ret) {
                IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
                goto err;
        }

        ret = iwlcore_init_geos(priv);
        if (ret) {
                IWL_ERR(priv, "initializing geos failed: %d\n", ret);
                goto err_free_channel_map;
        }
        iwlcore_init_hw_rates(priv, priv->ieee_rates);

        return 0;

err_free_channel_map:
        iwl_free_channel_map(priv);
err:
        return ret;
}
EXPORT_SYMBOL(iwl_init_drv);

int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
        int ret = 0;
        if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
                IWL_WARN(priv, "Requested user TXPOWER %d below limit.\n",
                            priv->tx_power_user_lmt);
                return -EINVAL;
        }

        if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
                IWL_WARN(priv, "Requested user TXPOWER %d above limit.\n",
                            priv->tx_power_user_lmt);
                return -EINVAL;
        }

        if (priv->tx_power_user_lmt != tx_power)
                force = true;

        priv->tx_power_user_lmt = tx_power;

        if (force && priv->cfg->ops->lib->send_tx_power)
                ret = priv->cfg->ops->lib->send_tx_power(priv);

        return ret;
}
EXPORT_SYMBOL(iwl_set_tx_power);

void iwl_uninit_drv(struct iwl_priv *priv)
{
        iwl_calib_free_results(priv);
        iwlcore_free_geos(priv);
        iwl_free_channel_map(priv);
        kfree(priv->scan);
}
EXPORT_SYMBOL(iwl_uninit_drv);


void iwl_disable_interrupts(struct iwl_priv *priv)
{
        clear_bit(STATUS_INT_ENABLED, &priv->status);

        /* disable interrupts from uCode/NIC to host */
        iwl_write32(priv, CSR_INT_MASK, 0x00000000);

        /* acknowledge/clear/reset any interrupts still pending
         * from uCode or flow handler (Rx/Tx DMA) */
        iwl_write32(priv, CSR_INT, 0xffffffff);
        iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
        IWL_DEBUG_ISR("Disabled interrupts\n");
}
EXPORT_SYMBOL(iwl_disable_interrupts);

void iwl_enable_interrupts(struct iwl_priv *priv)
{
        IWL_DEBUG_ISR("Enabling interrupts\n");
        set_bit(STATUS_INT_ENABLED, &priv->status);
        iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
}
EXPORT_SYMBOL(iwl_enable_interrupts);

int iwl_send_bt_config(struct iwl_priv *priv)
{
        struct iwl_bt_cmd bt_cmd = {
                .flags = 3,
                .lead_time = 0xAA,
                .max_kill = 1,
                .kill_ack_mask = 0,
                .kill_cts_mask = 0,
        };

        return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
                                sizeof(struct iwl_bt_cmd), &bt_cmd);
}
EXPORT_SYMBOL(iwl_send_bt_config);

int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
{
        u32 stat_flags = 0;
        struct iwl_host_cmd cmd = {
                .id = REPLY_STATISTICS_CMD,
                .meta.flags = flags,
                .len = sizeof(stat_flags),
                .data = (u8 *) &stat_flags,
        };
        return iwl_send_cmd(priv, &cmd);
}
EXPORT_SYMBOL(iwl_send_statistics_request);

/**
 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
 *   using sample data 100 bytes apart.  If these sample points are good,
 *   it's a pretty good bet that everything between them is good, too.
 */
static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
        u32 val;
        int ret = 0;
        u32 errcnt = 0;
        u32 i;

        IWL_DEBUG_INFO("ucode inst image size is %u\n", len);

        ret = iwl_grab_nic_access(priv);
        if (ret)
                return ret;

        for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
                /* read data comes through single port, auto-incr addr */
                /* NOTE: Use the debugless read so we don't flood kernel log
                 * if IWL_DL_IO is set */
                iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
                        i + IWL49_RTC_INST_LOWER_BOUND);
                val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
                if (val != le32_to_cpu(*image)) {
                        ret = -EIO;
                        errcnt++;
                        if (errcnt >= 3)
                                break;
                }
        }

        iwl_release_nic_access(priv);

        return ret;
}

/**
 * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
 *     looking at all data.
 */
static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
                                 u32 len)
{
        u32 val;
        u32 save_len = len;
        int ret = 0;
        u32 errcnt;

        IWL_DEBUG_INFO("ucode inst image size is %u\n", len);

        ret = iwl_grab_nic_access(priv);
        if (ret)
                return ret;

        iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
                           IWL49_RTC_INST_LOWER_BOUND);

        errcnt = 0;
        for (; len > 0; len -= sizeof(u32), image++) {
                /* read data comes through single port, auto-incr addr */
                /* NOTE: Use the debugless read so we don't flood kernel log
                 * if IWL_DL_IO is set */
                val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
                if (val != le32_to_cpu(*image)) {
                        IWL_ERR(priv, "uCode INST section is invalid at "
                                  "offset 0x%x, is 0x%x, s/b 0x%x\n",
                                  save_len - len, val, le32_to_cpu(*image));
                        ret = -EIO;
                        errcnt++;
                        if (errcnt >= 20)
                                break;
                }
        }

        iwl_release_nic_access(priv);

        if (!errcnt)
                IWL_DEBUG_INFO
                    ("ucode image in INSTRUCTION memory is good\n");

        return ret;
}

/**
 * iwl_verify_ucode - determine which instruction image is in SRAM,
 *    and verify its contents
 */
int iwl_verify_ucode(struct iwl_priv *priv)
{
        __le32 *image;
        u32 len;
        int ret;

        /* Try bootstrap */
        image = (__le32 *)priv->ucode_boot.v_addr;
        len = priv->ucode_boot.len;
        ret = iwlcore_verify_inst_sparse(priv, image, len);
        if (!ret) {
                IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
                return 0;
        }

        /* Try initialize */
        image = (__le32 *)priv->ucode_init.v_addr;
        len = priv->ucode_init.len;
        ret = iwlcore_verify_inst_sparse(priv, image, len);
        if (!ret) {
                IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
                return 0;
        }

        /* Try runtime/protocol */
        image = (__le32 *)priv->ucode_code.v_addr;
        len = priv->ucode_code.len;
        ret = iwlcore_verify_inst_sparse(priv, image, len);
        if (!ret) {
                IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
                return 0;
        }

        IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");

        /* Since nothing seems to match, show first several data entries in
         * instruction SRAM, so maybe visual inspection will give a clue.
         * Selection of bootstrap image (vs. other images) is arbitrary. */
        image = (__le32 *)priv->ucode_boot.v_addr;
        len = priv->ucode_boot.len;
        ret = iwl_verify_inst_full(priv, image, len);

        return ret;
}
EXPORT_SYMBOL(iwl_verify_ucode);


static const char *desc_lookup_text[] = {
        "OK",
        "FAIL",
        "BAD_PARAM",
        "BAD_CHECKSUM",
        "NMI_INTERRUPT_WDG",
        "SYSASSERT",
        "FATAL_ERROR",
        "BAD_COMMAND",
        "HW_ERROR_TUNE_LOCK",
        "HW_ERROR_TEMPERATURE",
        "ILLEGAL_CHAN_FREQ",
        "VCC_NOT_STABLE",
        "FH_ERROR",
        "NMI_INTERRUPT_HOST",
        "NMI_INTERRUPT_ACTION_PT",
        "NMI_INTERRUPT_UNKNOWN",
        "UCODE_VERSION_MISMATCH",
        "HW_ERROR_ABS_LOCK",
        "HW_ERROR_CAL_LOCK_FAIL",
        "NMI_INTERRUPT_INST_ACTION_PT",
        "NMI_INTERRUPT_DATA_ACTION_PT",
        "NMI_TRM_HW_ER",
        "NMI_INTERRUPT_TRM",
        "NMI_INTERRUPT_BREAK_POINT"
        "DEBUG_0",
        "DEBUG_1",
        "DEBUG_2",
        "DEBUG_3",
        "UNKNOWN"
};

static const char *desc_lookup(int i)
{
        int max = ARRAY_SIZE(desc_lookup_text) - 1;

        if (i < 0 || i > max)
                i = max;

        return desc_lookup_text[i];
}

#define ERROR_START_OFFSET  (1 * sizeof(u32))
#define ERROR_ELEM_SIZE     (7 * sizeof(u32))

void iwl_dump_nic_error_log(struct iwl_priv *priv)
{
        u32 data2, line;
        u32 desc, time, count, base, data1;
        u32 blink1, blink2, ilink1, ilink2;
        int ret;

        if (priv->ucode_type == UCODE_INIT)
                base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
        else
                base = le32_to_cpu(priv->card_alive.error_event_table_ptr);

        if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
                IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
                return;
        }

        ret = iwl_grab_nic_access(priv);
        if (ret) {
                IWL_WARN(priv, "Can not read from adapter at this time.\n");
                return;
        }

        count = iwl_read_targ_mem(priv, base);

        if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
                IWL_ERR(priv, "Start IWL Error Log Dump:\n");
                IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
                        priv->status, count);
        }

        desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
        blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
        blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
        ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
        ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
        data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
        data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
        line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
        time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));

        IWL_ERR(priv, "Desc                               Time       "
                "data1      data2      line\n");
        IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
                desc_lookup(desc), desc, time, data1, data2, line);
        IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
        IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
                ilink1, ilink2);

        iwl_release_nic_access(priv);
}
EXPORT_SYMBOL(iwl_dump_nic_error_log);

#define EVENT_START_OFFSET  (4 * sizeof(u32))

/**
 * iwl_print_event_log - Dump error event log to syslog
 *
 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
 */
static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
                                u32 num_events, u32 mode)
{
        u32 i;
        u32 base;       /* SRAM byte address of event log header */
        u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
        u32 ptr;        /* SRAM byte address of log data */
        u32 ev, time, data; /* event log data */

        if (num_events == 0)
                return;
        if (priv->ucode_type == UCODE_INIT)
                base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
        else
                base = le32_to_cpu(priv->card_alive.log_event_table_ptr);

        if (mode == 0)
                event_size = 2 * sizeof(u32);
        else
                event_size = 3 * sizeof(u32);

        ptr = base + EVENT_START_OFFSET + (start_idx * event_size);

        /* "time" is actually "data" for mode 0 (no timestamp).
        * place event id # at far right for easier visual parsing. */
        for (i = 0; i < num_events; i++) {
                ev = iwl_read_targ_mem(priv, ptr);
                ptr += sizeof(u32);
                time = iwl_read_targ_mem(priv, ptr);
                ptr += sizeof(u32);
                if (mode == 0) {
                        /* data, ev */
                        IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
                } else {
                        data = iwl_read_targ_mem(priv, ptr);
                        ptr += sizeof(u32);
                        IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
                                        time, data, ev);
                }
        }
}

void iwl_dump_nic_event_log(struct iwl_priv *priv)
{
        int ret;
        u32 base;       /* SRAM byte address of event log header */
        u32 capacity;   /* event log capacity in # entries */
        u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
        u32 num_wraps;  /* # times uCode wrapped to top of log */
        u32 next_entry; /* index of next entry to be written by uCode */
        u32 size;       /* # entries that we'll print */

        if (priv->ucode_type == UCODE_INIT)
                base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
        else
                base = le32_to_cpu(priv->card_alive.log_event_table_ptr);

        if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
                IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
                return;
        }

        ret = iwl_grab_nic_access(priv);
        if (ret) {
                IWL_WARN(priv, "Can not read from adapter at this time.\n");
                return;
        }

        /* event log header */
        capacity = iwl_read_targ_mem(priv, base);
        mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
        num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
        next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));

        size = num_wraps ? capacity : next_entry;

        /* bail out if nothing in log */
        if (size == 0) {
                IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
                iwl_release_nic_access(priv);
                return;
        }

        IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
                        size, num_wraps);

        /* if uCode has wrapped back to top of log, start at the oldest entry,
         * i.e the next one that uCode would fill. */
        if (num_wraps)
                iwl_print_event_log(priv, next_entry,
                                        capacity - next_entry, mode);
        /* (then/else) start at top of log */
        iwl_print_event_log(priv, 0, next_entry, mode);

        iwl_release_nic_access(priv);
}
EXPORT_SYMBOL(iwl_dump_nic_event_log);

void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
        struct iwl_ct_kill_config cmd;
        unsigned long flags;
        int ret = 0;

        spin_lock_irqsave(&priv->lock, flags);
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
                    CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
        spin_unlock_irqrestore(&priv->lock, flags);

        cmd.critical_temperature_R =
                cpu_to_le32(priv->hw_params.ct_kill_threshold);

        ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
                               sizeof(cmd), &cmd);
        if (ret)
                IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
        else
                IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
                        "critical temperature is %d\n",
                        cmd.critical_temperature_R);
}
EXPORT_SYMBOL(iwl_rf_kill_ct_config);


/*
 * CARD_STATE_CMD
 *
 * Use: Sets the device's internal card state to enable, disable, or halt
 *
 * When in the 'enable' state the card operates as normal.
 * When in the 'disable' state, the card enters into a low power mode.
 * When in the 'halt' state, the card is shut down and must be fully
 * restarted to come back on.
 */
int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
{
        struct iwl_host_cmd cmd = {
                .id = REPLY_CARD_STATE_CMD,
                .len = sizeof(u32),
                .data = &flags,
                .meta.flags = meta_flag,
        };

        return iwl_send_cmd(priv, &cmd);
}
EXPORT_SYMBOL(iwl_send_card_state);

void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
{
        unsigned long flags;

        if (test_bit(STATUS_RF_KILL_SW, &priv->status))
                return;

        IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO OFF\n");

        iwl_scan_cancel(priv);
        /* FIXME: This is a workaround for AP */
        if (priv->iw_mode != NL80211_IFTYPE_AP) {
                spin_lock_irqsave(&priv->lock, flags);
                iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
                            CSR_UCODE_SW_BIT_RFKILL);
                spin_unlock_irqrestore(&priv->lock, flags);
                /* call the host command only if no hw rf-kill set */
                if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
                    iwl_is_ready(priv))
                        iwl_send_card_state(priv,
                                CARD_STATE_CMD_DISABLE, 0);
                set_bit(STATUS_RF_KILL_SW, &priv->status);
                        /* make sure mac80211 stop sending Tx frame */
                if (priv->mac80211_registered)
                        ieee80211_stop_queues(priv->hw);
        }
}
EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);

int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
{
        unsigned long flags;

        if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
                return 0;

        IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO ON\n");

        spin_lock_irqsave(&priv->lock, flags);
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);

        /* If the driver is up it will receive CARD_STATE_NOTIFICATION
         * notification where it will clear SW rfkill status.
         * Setting it here would break the handler. Only if the
         * interface is down we can set here since we don't
         * receive any further notification.
         */
        if (!priv->is_open)
                clear_bit(STATUS_RF_KILL_SW, &priv->status);
        spin_unlock_irqrestore(&priv->lock, flags);

        /* wake up ucode */
        msleep(10);

        spin_lock_irqsave(&priv->lock, flags);
        iwl_read32(priv, CSR_UCODE_DRV_GP1);
        if (!iwl_grab_nic_access(priv))
                iwl_release_nic_access(priv);
        spin_unlock_irqrestore(&priv->lock, flags);

        if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
                IWL_DEBUG_RF_KILL("Can not turn radio back on - "
                                  "disabled by HW switch\n");
                return 0;
        }

        /* when driver is up while rfkill is on, it wont receive
         * any CARD_STATE_NOTIFICATION notifications so we have to
         * restart it in here
         */
        if (priv->is_open && !test_bit(STATUS_ALIVE, &priv->status)) {
                clear_bit(STATUS_RF_KILL_SW, &priv->status);
                if (!iwl_is_rfkill(priv))
                        queue_work(priv->workqueue, &priv->up);
        }

        /* If the driver is already loaded, it will receive
         * CARD_STATE_NOTIFICATION notifications and the handler will
         * call restart to reload the driver.
         */
        return 1;
}
EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);

void iwl_bg_rf_kill(struct work_struct *work)
{
        struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);

        wake_up_interruptible(&priv->wait_command_queue);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        mutex_lock(&priv->mutex);

        if (!iwl_is_rfkill(priv)) {
                IWL_DEBUG(IWL_DL_RF_KILL,
                          "HW and/or SW RF Kill no longer active, restarting "
                          "device\n");
                if (!test_bit(STATUS_EXIT_PENDING, &priv->status) &&
                    test_bit(STATUS_ALIVE, &priv->status))
                        queue_work(priv->workqueue, &priv->restart);
        } else {
                /* make sure mac80211 stop sending Tx frame */
                if (priv->mac80211_registered)
                        ieee80211_stop_queues(priv->hw);

                if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
                        IWL_DEBUG_RF_KILL("Can not turn radio back on - "
                                          "disabled by SW switch\n");
                else
                        IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
                                    "Kill switch must be turned off for "
                                    "wireless networking to work.\n");
        }
        mutex_unlock(&priv->mutex);
        iwl_rfkill_set_hw_state(priv);
}
EXPORT_SYMBOL(iwl_bg_rf_kill);