[mirror_ubuntu-artful-kernel.git] / drivers / net / arcnet / com20020.c

/*
 * Linux ARCnet driver - COM20020 chipset support
 *
 * Written 1997 by David Woodhouse.
 * Written 1994-1999 by Avery Pennarun.
 * Written 1999 by Martin Mares <mj@ucw.cz>.
 * Derived from skeleton.c by Donald Becker.
 *
 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
 *  for sponsoring the further development of this driver.
 *
 * **********************
 *
 * The original copyright of skeleton.c was as follows:
 *
 * skeleton.c Written 1993 by Donald Becker.
 * Copyright 1993 United States Government as represented by the
 * Director, National Security Agency.  This software may only be used
 * and distributed according to the terms of the GNU General Public License as
 * modified by SRC, incorporated herein by reference.
 *
 * **********************
 *
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */

#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include "arcdevice.h"
#include "com20020.h"

static const char * const clockrates[] = {
	"XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s",
	"1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s",
	"Reserved", "Reserved", "Reserved"
};

static void com20020_command(struct net_device *dev, int command);
static int com20020_status(struct net_device *dev);
static void com20020_setmask(struct net_device *dev, int mask);
static int com20020_reset(struct net_device *dev, int really_reset);
static void com20020_copy_to_card(struct net_device *dev, int bufnum,
				  int offset, void *buf, int count);
static void com20020_copy_from_card(struct net_device *dev, int bufnum,
				    int offset, void *buf, int count);
static void com20020_set_mc_list(struct net_device *dev);
static void com20020_close(struct net_device *);

static void com20020_copy_from_card(struct net_device *dev, int bufnum,
				    int offset, void *buf, int count)
{
	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;

	/* set up the address register */
	arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag,
		    ioaddr, COM20020_REG_W_ADDR_HI);
	arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);

	/* copy the data */
	TIME(dev, "insb", count,
	     arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
}

static void com20020_copy_to_card(struct net_device *dev, int bufnum,
				  int offset, void *buf, int count)
{
	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;

	/* set up the address register */
	arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI);
	arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);

	/* copy the data */
	TIME(dev, "outsb", count,
	     arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
}

/* Reset the card and check some basic stuff during the detection stage. */
int com20020_check(struct net_device *dev)
{
	int ioaddr = dev->base_addr, status;
	struct arcnet_local *lp = netdev_priv(dev);

	arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
	udelay(5);
	arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG);
	mdelay(RESETtime);

	lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
	lp->setup2 = (lp->clockm << 4) | 8;

	/* CHECK: should we do this for SOHARD cards ? */
	/* Enable P1Mode for backplane mode */
	lp->setup = lp->setup | P1MODE;

	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);

	if (lp->clockm != 0) {
		com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
		arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);

		/* must now write the magic "restart operation" command */
		mdelay(1);
		arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
	}

	lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
	/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
	arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG);

	status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);

	if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
		arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status);
		return -ENODEV;
	}
	arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status);

	arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
		    ioaddr, COM20020_REG_W_COMMAND);
	status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
	arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n",
		   status);

	/* Read first location of memory */
	arcnet_outb(0 | RDDATAflag | AUTOINCflag,
		    ioaddr, COM20020_REG_W_ADDR_HI);
	arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO);

	status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA);
	if (status != TESTvalue) {
		arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
			   status);
		return -ENODEV;
	}
	return 0;
}

static int com20020_set_hwaddr(struct net_device *dev, void *addr)
{
	int ioaddr = dev->base_addr;
	struct arcnet_local *lp = netdev_priv(dev);
	struct sockaddr *hwaddr = addr;

	memcpy(dev->dev_addr, hwaddr->sa_data, 1);
	com20020_set_subaddress(lp, ioaddr, SUB_NODE);
	arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);

	return 0;
}

static int com20020_netdev_open(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct arcnet_local *lp = netdev_priv(dev);

	lp->config |= TXENcfg;
	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);

	return arcnet_open(dev);
}

static int com20020_netdev_close(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct arcnet_local *lp = netdev_priv(dev);

	arcnet_close(dev);

	/* disable transmitter */
	lp->config &= ~TXENcfg;
	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
	return 0;
}

const struct net_device_ops com20020_netdev_ops = {
	.ndo_open	= com20020_netdev_open,
	.ndo_stop	= com20020_netdev_close,
	.ndo_start_xmit = arcnet_send_packet,
	.ndo_tx_timeout = arcnet_timeout,
	.ndo_set_mac_address = com20020_set_hwaddr,
	.ndo_set_rx_mode = com20020_set_mc_list,
};

/* Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
int com20020_found(struct net_device *dev, int shared)
{
	struct arcnet_local *lp;
	int ioaddr = dev->base_addr;

	/* Initialize the rest of the device structure. */

	lp = netdev_priv(dev);

	lp->hw.owner = THIS_MODULE;
	lp->hw.command = com20020_command;
	lp->hw.status = com20020_status;
	lp->hw.intmask = com20020_setmask;
	lp->hw.reset = com20020_reset;
	lp->hw.copy_to_card = com20020_copy_to_card;
	lp->hw.copy_from_card = com20020_copy_from_card;
	lp->hw.close = com20020_close;

	/* FIXME: do this some other way! */
	if (!dev->dev_addr[0])
		dev->dev_addr[0] = arcnet_inb(ioaddr, 8);

	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);

	if (lp->card_flags & ARC_CAN_10MBIT) {
		com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
		arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);

		/* must now write the magic "restart operation" command */
		mdelay(1);
		arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
	}

	lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
	/* Default 0x38 + register: Node ID */
	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
	arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);

	/* reserve the irq */
	if (request_irq(dev->irq, arcnet_interrupt, shared,
			"arcnet (COM20020)", dev)) {
		arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}

	dev->base_addr = ioaddr;

	arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
		   lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);

	if (lp->backplane)
		arc_printk(D_NORMAL, dev, "Using backplane mode.\n");

	if (lp->timeout != 3)
		arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n",
			   lp->timeout);

	arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n",
		   lp->setup >> 1,
		   clockrates[3 -
			      ((lp->setup2 & 0xF0) >> 4) +
			      ((lp->setup & 0x0F) >> 1)]);
			/* The clockrates array index looks very fragile.
			 * It seems like it could have negative indexing.
			 */

	if (register_netdev(dev)) {
		free_irq(dev->irq, dev);
		return -EIO;
	}
	return 0;
}

/* Do a hardware reset on the card, and set up necessary registers.
 *
 * This should be called as little as possible, because it disrupts the
 * token on the network (causes a RECON) and requires a significant delay.
 *
 * However, it does make sure the card is in a defined state.
 */
static int com20020_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	u_int ioaddr = dev->base_addr;
	u_char inbyte;

	arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
		   __FILE__, __LINE__, __func__, dev, lp, dev->name);
	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
		   dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS));

	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
	lp->config |= (lp->timeout << 3) | (lp->backplane << 2);
	/* power-up defaults */
	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);

	if (really_reset) {
		/* reset the card */
		arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
		udelay(5);
		arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
		mdelay(RESETtime * 2);
				/* COM20020 seems to be slower sometimes */
	}
	/* clear flags & end reset */
	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
	arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
		    ioaddr, COM20020_REG_W_COMMAND);

	/* verify that the ARCnet signature byte is present */
	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);

	com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
	if (inbyte != TESTvalue) {
		arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
			   __FILE__, __LINE__, __func__);
		arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
		return 1;
	}
	/* enable extended (512-byte) packets */
	arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND);

	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);

	/* done!  return success. */
	return 0;
}

static void com20020_setmask(struct net_device *dev, int mask)
{
	u_int ioaddr = dev->base_addr;

	arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr);
	arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK);
}

static void com20020_command(struct net_device *dev, int cmd)
{
	u_int ioaddr = dev->base_addr;

	arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND);
}

static int com20020_status(struct net_device *dev)
{
	u_int ioaddr = dev->base_addr;

	return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) +
		(arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8);
}

static void com20020_close(struct net_device *dev)
{
	struct arcnet_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	/* disable transmitter */
	lp->config &= ~TXENcfg;
	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
}

/* Set or clear the multicast filter for this adaptor.
 * num_addrs == -1    Promiscuous mode, receive all packets
 * num_addrs == 0       Normal mode, clear multicast list
 * num_addrs > 0        Multicast mode, receive normal and MC packets, and do
 *                      best-effort filtering.
 *      FIXME - do multicast stuff, not just promiscuous.
 */
static void com20020_set_mc_list(struct net_device *dev)
{
	struct arcnet_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {
		/* Enable promiscuous mode */
		if (!(lp->setup & PROMISCset))
			arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n");
		com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
		lp->setup |= PROMISCset;
		arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
	} else {
		/* Disable promiscuous mode, use normal mode */
		if ((lp->setup & PROMISCset))
			arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n");
		com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
		lp->setup &= ~PROMISCset;
		arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
	}
}

#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
    defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
    defined(CONFIG_ARCNET_COM20020_CS_MODULE)
EXPORT_SYMBOL(com20020_check);
EXPORT_SYMBOL(com20020_found);
EXPORT_SYMBOL(com20020_netdev_ops);
#endif

MODULE_LICENSE("GPL");

#ifdef MODULE

static int __init com20020_module_init(void)
{
	if (BUGLVL(D_NORMAL))
		pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)");
	return 0;
}

static void __exit com20020_module_exit(void)
{
}
module_init(com20020_module_init);
module_exit(com20020_module_exit);
#endif				/* MODULE */
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Linux ARCnet driver - COM20020 chipset support
cb334648	3	*
1da177e4 LT	4	* Written 1997 by David Woodhouse.
	5	* Written 1994-1999 by Avery Pennarun.
	6	* Written 1999 by Martin Mares <mj@ucw.cz>.
	7	* Derived from skeleton.c by Donald Becker.
	8	*
	9	* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
	10	* for sponsoring the further development of this driver.
	11	*
	12	* **********************
	13	*
	14	* The original copyright of skeleton.c was as follows:
	15	*
	16	* skeleton.c Written 1993 by Donald Becker.
	17	* Copyright 1993 United States Government as represented by the
	18	* Director, National Security Agency. This software may only be used
	19	* and distributed according to the terms of the GNU General Public License as
	20	* modified by SRC, incorporated herein by reference.
	21	*
	22	* **********************
	23	*
	24	* For more details, see drivers/net/arcnet.c
	25	*
	26	* **********************
	27	*/
05a24b23 JP	28
	29	#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
	30
1da177e4 LT	31	#include <linux/module.h>
	32	#include <linux/kernel.h>
	33	#include <linux/types.h>
	34	#include <linux/ioport.h>
1da177e4 LT	35	#include <linux/errno.h>
	36	#include <linux/delay.h>
	37	#include <linux/netdevice.h>
	38	#include <linux/init.h>
a6b7a407	39	#include <linux/interrupt.h>
5e7ef913	40	#include <linux/io.h>
1da177e4	41
26c6d281 JP	42	#include "arcdevice.h"
	43	#include "com20020.h"
	44
4e299b92 JP	45	static const char * const clockrates[] = {
	46	"XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s",
	47	"1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s",
	48	"Reserved", "Reserved", "Reserved"
7f5e760c	49	};
1da177e4 LT	50
	51	static void com20020_command(struct net_device *dev, int command);
	52	static int com20020_status(struct net_device *dev);
	53	static void com20020_setmask(struct net_device *dev, int mask);
	54	static int com20020_reset(struct net_device *dev, int really_reset);
	55	static void com20020_copy_to_card(struct net_device *dev, int bufnum,
	56	int offset, void *buf, int count);
	57	static void com20020_copy_from_card(struct net_device *dev, int bufnum,
	58	int offset, void *buf, int count);
	59	static void com20020_set_mc_list(struct net_device *dev);
	60	static void com20020_close(struct net_device *);
	61
	62	static void com20020_copy_from_card(struct net_device *dev, int bufnum,
	63	int offset, void *buf, int count)
	64	{
	65	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
	66
	67	/* set up the address register */
0fec6513 JP	68	arcnet_outb((ofs >> 8) \| RDDATAflag \| AUTOINCflag,
	69	ioaddr, COM20020_REG_W_ADDR_HI);
	70	arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
1da177e4 LT	71
1da177e4 LT	72	/* copy the data */
0fec6513 JP	73	TIME(dev, "insb", count,
0fec6513 JP	74	arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
1da177e4 LT	75	}
1da177e4 LT	76
1da177e4 LT	77	static void com20020_copy_to_card(struct net_device *dev, int bufnum,
	78	int offset, void *buf, int count)
	79	{
	80	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
	81
	82	/* set up the address register */
0fec6513 JP	83	arcnet_outb((ofs >> 8) \| AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI);
0fec6513 JP	84	arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
1da177e4 LT	85
1da177e4 LT	86	/* copy the data */
0fec6513 JP	87	TIME(dev, "outsb", count,
0fec6513 JP	88	arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
1da177e4 LT	89	}
1da177e4 LT	90
1da177e4 LT	91	/* Reset the card and check some basic stuff during the detection stage. */
	92	int com20020_check(struct net_device *dev)
	93	{
	94	int ioaddr = dev->base_addr, status;
454d7c9b	95	struct arcnet_local *lp = netdev_priv(dev);
1da177e4	96
84286f19	97	arcnet_outb(XTOcfg(3) \| RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
0fec6513	98	udelay(5);
84286f19	99	arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG);
1da177e4 LT	100	mdelay(RESETtime);
	101
	102	lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
	103	lp->setup2 = (lp->clockm << 4) \| 8;
	104
	105	/* CHECK: should we do this for SOHARD cards ? */
	106	/* Enable P1Mode for backplane mode */
	107	lp->setup = lp->setup \| P1MODE;
	108
0fec6513 JP	109	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
0fec6513 JP	110	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
1da177e4	111
7f5e760c	112	if (lp->clockm != 0) {
0fec6513 JP	113	com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
0fec6513 JP	114	arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
cb334648	115
1da177e4 LT	116	/* must now write the magic "restart operation" command */
1da177e4 LT	117	mdelay(1);
84286f19	118	arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
1da177e4 LT	119	}
1da177e4 LT	120
27daf6ed	121	lp->config = (lp->timeout << 3) \| (lp->backplane << 2) \| SUB_NODE;
1da177e4	122	/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
0fec6513 JP	123	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
0fec6513 JP	124	arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG);
1da177e4	125
0fec6513	126	status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
1da177e4 LT	127
1da177e4 LT	128	if ((status & 0x99) != (NORXflag \| TXFREEflag \| RESETflag)) {
a34c0932	129	arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status);
1da177e4 LT	130	return -ENODEV;
1da177e4 LT	131	}
a34c0932	132	arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status);
1da177e4	133
0fec6513 JP	134	arcnet_outb(CFLAGScmd \| RESETclear \| CONFIGclear,
	135	ioaddr, COM20020_REG_W_COMMAND);
	136	status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
a34c0932 JP	137	arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n",
a34c0932 JP	138	status);
1da177e4 LT	139
1da177e4 LT	140	/* Read first location of memory */
0fec6513 JP	141	arcnet_outb(0 \| RDDATAflag \| AUTOINCflag,
	142	ioaddr, COM20020_REG_W_ADDR_HI);
	143	arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO);
1da177e4	144
0fec6513	145	status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA);
97464edd	146	if (status != TESTvalue) {
a34c0932 JP	147	arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
a34c0932 JP	148	status);
1da177e4 LT	149	return -ENODEV;
	150	}
	151	return 0;
	152	}
	153
a0d2e513 MG	154	static int com20020_set_hwaddr(struct net_device dev, void addr)
	155	{
	156	int ioaddr = dev->base_addr;
	157	struct arcnet_local *lp = netdev_priv(dev);
	158	struct sockaddr *hwaddr = addr;
	159
	160	memcpy(dev->dev_addr, hwaddr->sa_data, 1);
0fec6513 JP	161	com20020_set_subaddress(lp, ioaddr, SUB_NODE);
0fec6513 JP	162	arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
a0d2e513 MG	163
	164	return 0;
	165	}
	166
27daf6ed MG	167	static int com20020_netdev_open(struct net_device *dev)
	168	{
	169	int ioaddr = dev->base_addr;
	170	struct arcnet_local *lp = netdev_priv(dev);
	171
	172	lp->config \|= TXENcfg;
	173	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
	174
	175	return arcnet_open(dev);
	176	}
	177
	178	static int com20020_netdev_close(struct net_device *dev)
	179	{
	180	int ioaddr = dev->base_addr;
	181	struct arcnet_local *lp = netdev_priv(dev);
	182
	183	arcnet_close(dev);
	184
	185	/* disable transmitter */
	186	lp->config &= ~TXENcfg;
	187	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
	188	return 0;
	189	}
	190
a1799af4	191	const struct net_device_ops com20020_netdev_ops = {
27daf6ed MG	192	.ndo_open = com20020_netdev_open,
27daf6ed MG	193	.ndo_stop = com20020_netdev_close,
a1799af4 SH	194	.ndo_start_xmit = arcnet_send_packet,
a1799af4 SH	195	.ndo_tx_timeout = arcnet_timeout,
a0d2e513	196	.ndo_set_mac_address = com20020_set_hwaddr,
afc4b13d	197	.ndo_set_rx_mode = com20020_set_mc_list,
a1799af4 SH	198	};
a1799af4 SH	199
1da177e4 LT	200	/* Set up the struct net_device associated with this card. Called after
	201	* probing succeeds.
	202	*/
	203	int com20020_found(struct net_device *dev, int shared)
	204	{
	205	struct arcnet_local *lp;
	206	int ioaddr = dev->base_addr;
	207
	208	/* Initialize the rest of the device structure. */
	209
454d7c9b	210	lp = netdev_priv(dev);
1da177e4 LT	211
	212	lp->hw.owner = THIS_MODULE;
	213	lp->hw.command = com20020_command;
	214	lp->hw.status = com20020_status;
	215	lp->hw.intmask = com20020_setmask;
	216	lp->hw.reset = com20020_reset;
	217	lp->hw.copy_to_card = com20020_copy_to_card;
	218	lp->hw.copy_from_card = com20020_copy_from_card;
	219	lp->hw.close = com20020_close;
	220
d6d7d3ed	221	/* FIXME: do this some other way! */
1da177e4	222	if (!dev->dev_addr[0])
0fec6513	223	dev->dev_addr[0] = arcnet_inb(ioaddr, 8);
1da177e4	224
0fec6513 JP	225	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
0fec6513 JP	226	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
1da177e4	227
7f5e760c	228	if (lp->card_flags & ARC_CAN_10MBIT) {
0fec6513 JP	229	com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
0fec6513 JP	230	arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
cb334648	231
1da177e4 LT	232	/* must now write the magic "restart operation" command */
1da177e4 LT	233	mdelay(1);
84286f19	234	arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
1da177e4 LT	235	}
1da177e4 LT	236
27daf6ed	237	lp->config = (lp->timeout << 3) \| (lp->backplane << 2) \| SUB_NODE;
1da177e4	238	/* Default 0x38 + register: Node ID */
0fec6513 JP	239	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
0fec6513 JP	240	arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
1da177e4 LT	241
1da177e4 LT	242	/* reserve the irq */
a0607fd3	243	if (request_irq(dev->irq, arcnet_interrupt, shared,
1da177e4	244	"arcnet (COM20020)", dev)) {
a34c0932	245	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	246	return -ENODEV;
	247	}
	248
	249	dev->base_addr = ioaddr;
	250
a34c0932 JP	251	arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
a34c0932 JP	252	lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
1da177e4 LT	253
1da177e4 LT	254	if (lp->backplane)
a34c0932	255	arc_printk(D_NORMAL, dev, "Using backplane mode.\n");
1da177e4 LT	256
1da177e4 LT	257	if (lp->timeout != 3)
a34c0932 JP	258	arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n",
a34c0932 JP	259	lp->timeout);
1da177e4	260
a34c0932 JP	261	arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n",
a34c0932 JP	262	lp->setup >> 1,
4e299b92 JP	263	clockrates[3 -
	264	((lp->setup2 & 0xF0) >> 4) +
	265	((lp->setup & 0x0F) >> 1)]);
	266	/* The clockrates array index looks very fragile.
	267	* It seems like it could have negative indexing.
	268	*/
1da177e4 LT	269
	270	if (register_netdev(dev)) {
	271	free_irq(dev->irq, dev);
	272	return -EIO;
	273	}
	274	return 0;
	275	}
	276
f2f0a16b	277	/* Do a hardware reset on the card, and set up necessary registers.
cb334648	278	*
1da177e4 LT	279	* This should be called as little as possible, because it disrupts the
	280	* token on the network (causes a RECON) and requires a significant delay.
	281	*
	282	* However, it does make sure the card is in a defined state.
	283	*/
	284	static int com20020_reset(struct net_device *dev, int really_reset)
	285	{
454d7c9b	286	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	287	u_int ioaddr = dev->base_addr;
	288	u_char inbyte;
	289
a34c0932 JP	290	arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
	291	__FILE__, __LINE__, __func__, dev, lp, dev->name);
	292	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
0fec6513	293	dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
1da177e4	294
a34c0932	295	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
27daf6ed	296	lp->config \|= (lp->timeout << 3) \| (lp->backplane << 2);
1da177e4	297	/* power-up defaults */
0fec6513	298	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
a34c0932	299	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
1da177e4 LT	300
	301	if (really_reset) {
	302	/* reset the card */
84286f19	303	arcnet_outb(lp->config \| RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
0fec6513 JP	304	udelay(5);
0fec6513 JP	305	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
d6d7d3ed JP	306	mdelay(RESETtime * 2);
d6d7d3ed JP	307	/* COM20020 seems to be slower sometimes */
1da177e4 LT	308	}
1da177e4 LT	309	/* clear flags & end reset */
a34c0932	310	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
0fec6513 JP	311	arcnet_outb(CFLAGScmd \| RESETclear \| CONFIGclear,
0fec6513 JP	312	ioaddr, COM20020_REG_W_COMMAND);
1da177e4 LT	313
1da177e4 LT	314	/* verify that the ARCnet signature byte is present */
a34c0932	315	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
1da177e4 LT	316
1da177e4 LT	317	com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
a34c0932	318	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
1da177e4	319	if (inbyte != TESTvalue) {
a34c0932 JP	320	arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
	321	__FILE__, __LINE__, __func__);
	322	arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
1da177e4 LT	323	return 1;
	324	}
	325	/* enable extended (512-byte) packets */
0fec6513 JP	326	arcnet_outb(CONFIGcmd \| EXTconf, ioaddr, COM20020_REG_W_COMMAND);
0fec6513 JP	327
a34c0932	328	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
1da177e4 LT	329
	330	/* done! return success. */
	331	return 0;
	332	}
	333
1da177e4 LT	334	static void com20020_setmask(struct net_device *dev, int mask)
	335	{
	336	u_int ioaddr = dev->base_addr;
01a1d5ac	337
a34c0932	338	arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr);
0fec6513	339	arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK);
1da177e4 LT	340	}
1da177e4 LT	341
1da177e4 LT	342	static void com20020_command(struct net_device *dev, int cmd)
	343	{
	344	u_int ioaddr = dev->base_addr;
01a1d5ac	345
0fec6513	346	arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND);
1da177e4 LT	347	}
1da177e4 LT	348
1da177e4 LT	349	static int com20020_status(struct net_device *dev)
	350	{
	351	u_int ioaddr = dev->base_addr;
	352
0fec6513 JP	353	return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) +
0fec6513 JP	354	(arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8);
1da177e4 LT	355	}
	356
	357	static void com20020_close(struct net_device *dev)
	358	{
454d7c9b	359	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	360	int ioaddr = dev->base_addr;
	361
	362	/* disable transmitter */
	363	lp->config &= ~TXENcfg;
0fec6513	364	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
1da177e4 LT	365	}
	366
	367	/* Set or clear the multicast filter for this adaptor.
	368	* num_addrs == -1 Promiscuous mode, receive all packets
	369	* num_addrs == 0 Normal mode, clear multicast list
	370	* num_addrs > 0 Multicast mode, receive normal and MC packets, and do
	371	* best-effort filtering.
	372	* FIXME - do multicast stuff, not just promiscuous.
	373	*/
	374	static void com20020_set_mc_list(struct net_device *dev)
	375	{
454d7c9b	376	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	377	int ioaddr = dev->base_addr;
1da177e4 LT	378
d6d7d3ed JP	379	if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {
d6d7d3ed JP	380	/* Enable promiscuous mode */
1da177e4	381	if (!(lp->setup & PROMISCset))
a34c0932	382	arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n");
0fec6513	383	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
1da177e4	384	lp->setup \|= PROMISCset;
0fec6513	385	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
d6d7d3ed	386	} else {
1da177e4	387	/* Disable promiscuous mode, use normal mode */
1da177e4	388	if ((lp->setup & PROMISCset))
a34c0932	389	arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n");
0fec6513	390	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
1da177e4	391	lp->setup &= ~PROMISCset;
0fec6513	392	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
1da177e4 LT	393	}
	394	}
	395
ace48ffb	396	#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) \|\| \
2a10387e RD	397	defined(CONFIG_ARCNET_COM20020_ISA_MODULE) \|\| \
2a10387e RD	398	defined(CONFIG_ARCNET_COM20020_CS_MODULE)
1da177e4 LT	399	EXPORT_SYMBOL(com20020_check);
1da177e4 LT	400	EXPORT_SYMBOL(com20020_found);
dd0a251c	401	EXPORT_SYMBOL(com20020_netdev_ops);
ace48ffb	402	#endif
1da177e4 LT	403
	404	MODULE_LICENSE("GPL");
	405
ace48ffb RD	406	#ifdef MODULE
ace48ffb RD	407
0ebd1c1d	408	static int __init com20020_module_init(void)
1da177e4	409	{
72aeea48	410	if (BUGLVL(D_NORMAL))
d6d7d3ed	411	pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)");
1da177e4 LT	412	return 0;
	413	}
	414
0ebd1c1d	415	static void __exit com20020_module_exit(void)
1da177e4 LT	416	{
1da177e4 LT	417	}
0ebd1c1d JS	418	module_init(com20020_module_init);
0ebd1c1d JS	419	module_exit(com20020_module_exit);
1da177e4	420	#endif /* MODULE */