[deliverable/linux.git] / drivers / net / arcnet / com90io.c

/*
 * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
 *
 * Written 1997 by David Woodhouse.
 * Written 1994-1999 by Avery Pennarun.
 * Written 1999-2000 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
 *
 * **********************
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/arcdevice.h>

#define VERSION "arcnet: COM90xx IO-mapped mode support (by David Woodhouse et el.)\n"

/* Internal function declarations */

static int com90io_found(struct net_device *dev);
static void com90io_command(struct net_device *dev, int command);
static int com90io_status(struct net_device *dev);
static void com90io_setmask(struct net_device *dev, int mask);
static int com90io_reset(struct net_device *dev, int really_reset);
static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count);
static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
				   void *buf, int count);

/* Handy defines for ARCnet specific stuff */

/* The number of low I/O ports used by the card. */
#define ARCNET_TOTAL_SIZE 16

/* COM 9026 controller chip --> ARCnet register addresses */
#define _INTMASK	(ioaddr + 0)	/* writable */
#define _STATUS		(ioaddr + 0)	/* readable */
#define _COMMAND	(ioaddr + 1)	/* writable, returns random vals on read (?) */
#define _RESET		(ioaddr + 8)	/* software reset (on read) */
#define _MEMDATA	(ioaddr + 12)	/* Data port for IO-mapped memory */
#define _ADDR_HI	(ioaddr + 15)	/* Control registers for said */
#define _ADDR_LO	(ioaddr + 14)
#define _CONFIG		(ioaddr + 2)	/* Configuration register */

#undef ASTATUS
#undef ACOMMAND
#undef AINTMASK

#define ASTATUS()	inb(_STATUS)
#define ACOMMAND(cmd)	outb((cmd), _COMMAND)
#define AINTMASK(msk)	outb((msk), _INTMASK)
#define SETCONF()	outb((lp->config), _CONFIG)

/****************************************************************************
 *                                                                          *
 * IO-mapped operation routines                                             *
 *                                                                          *
 ****************************************************************************/

#undef ONE_AT_A_TIME_TX
#undef ONE_AT_A_TIME_RX

static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
{
	int ioaddr = dev->base_addr;

	outb(offset >> 8, _ADDR_HI);
	outb(offset & 0xff, _ADDR_LO);

	return inb(_MEMDATA);
}

#ifdef ONE_AT_A_TIME_TX
static void put_buffer_byte(struct net_device *dev, unsigned offset, u_char datum)
{
	int ioaddr = dev->base_addr;

	outb(offset >> 8, _ADDR_HI);
	outb(offset & 0xff, _ADDR_LO);

	outb(datum, _MEMDATA);
}

#endif

static void get_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest)
{
	int ioaddr = dev->base_addr;

	outb((offset >> 8) | AUTOINCflag, _ADDR_HI);
	outb(offset & 0xff, _ADDR_LO);

	while (length--)
#ifdef ONE_AT_A_TIME_RX
		*(dest++) = get_buffer_byte(dev, offset++);
#else
		*(dest++) = inb(_MEMDATA);
#endif
}

static void put_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest)
{
	int ioaddr = dev->base_addr;

	outb((offset >> 8) | AUTOINCflag, _ADDR_HI);
	outb(offset & 0xff, _ADDR_LO);

	while (length--)
#ifdef ONE_AT_A_TIME_TX
		put_buffer_byte(dev, offset++, *(dest++));
#else
		outb(*(dest++), _MEMDATA);
#endif
}

/*
 * We cannot probe for an IO mapped card either, although we can check that
 * it's where we were told it was, and even autoirq
 */
static int __init com90io_probe(struct net_device *dev)
{
	int ioaddr = dev->base_addr, status;
	unsigned long airqmask;

	BUGLVL(D_NORMAL) printk(VERSION);
	BUGLVL(D_NORMAL) printk("E-mail me if you actually test this driver, please!\n");

	if (!ioaddr) {
		BUGMSG(D_NORMAL, "No autoprobe for IO mapped cards; you must specify the base address!\n");
		return -ENODEV;
	}
	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
		BUGMSG(D_INIT_REASONS, "IO request_region %x-%x failed.\n",
		       ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
		return -ENXIO;
	}
	if (ASTATUS() == 0xFF) {
		BUGMSG(D_INIT_REASONS, "IO address %x empty\n", ioaddr);
		goto err_out;
	}
	inb(_RESET);
	mdelay(RESETtime);

	status = ASTATUS();

	if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
		BUGMSG(D_INIT_REASONS, "Status invalid (%Xh).\n", status);
		goto err_out;
	}
	BUGMSG(D_INIT_REASONS, "Status after reset: %X\n", status);

	ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);

	BUGMSG(D_INIT_REASONS, "Status after reset acknowledged: %X\n", status);

	status = ASTATUS();

	if (status & RESETflag) {
		BUGMSG(D_INIT_REASONS, "Eternal reset (status=%Xh)\n", status);
		goto err_out;
	}
	outb((0x16 | IOMAPflag) & ~ENABLE16flag, _CONFIG);

	/* Read first loc'n of memory */

	outb(AUTOINCflag, _ADDR_HI);
	outb(0, _ADDR_LO);

	if ((status = inb(_MEMDATA)) != 0xd1) {
		BUGMSG(D_INIT_REASONS, "Signature byte not found (%Xh instead).\n",
		       status);
		goto err_out;
	}
	if (!dev->irq) {
		/*
		 * if we do this, we're sure to get an IRQ since the
		 * card has just reset and the NORXflag is on until
		 * we tell it to start receiving.
		 */

		airqmask = probe_irq_on();
		outb(NORXflag, _INTMASK);
		udelay(1);
		outb(0, _INTMASK);
		dev->irq = probe_irq_off(airqmask);

		if ((int)dev->irq <= 0) {
			BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed\n");
			goto err_out;
		}
	}
	release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
	return com90io_found(dev);

err_out:
	release_region(ioaddr, ARCNET_TOTAL_SIZE);
	return -ENODEV;
}

/* Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init com90io_found(struct net_device *dev)
{
	struct arcnet_local *lp;
	int ioaddr = dev->base_addr;
	int err;

	/* Reserve the irq */
	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) {
		BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}
	/* Reserve the I/O region */
	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) {
		free_irq(dev->irq, dev);
		return -EBUSY;
	}

	lp = netdev_priv(dev);
	lp->card_name = "COM90xx I/O";
	lp->hw.command = com90io_command;
	lp->hw.status = com90io_status;
	lp->hw.intmask = com90io_setmask;
	lp->hw.reset = com90io_reset;
	lp->hw.owner = THIS_MODULE;
	lp->hw.copy_to_card = com90io_copy_to_card;
	lp->hw.copy_from_card = com90io_copy_from_card;

	lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
	SETCONF();

	/* get and check the station ID from offset 1 in shmem */

	dev->dev_addr[0] = get_buffer_byte(dev, 1);

	err = register_netdev(dev);
	if (err) {
		outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
		free_irq(dev->irq, dev);
		release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
		return err;
	}

	BUGMSG(D_NORMAL, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
	       dev->dev_addr[0], dev->base_addr, dev->irq);

	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 com90io_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	short ioaddr = dev->base_addr;

	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());

	if (really_reset) {
		/* reset the card */
		inb(_RESET);
		mdelay(RESETtime);
	}
	/* Set the thing to IO-mapped, 8-bit  mode */
	lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
	SETCONF();

	ACOMMAND(CFLAGScmd | RESETclear);	/* clear flags & end reset */
	ACOMMAND(CFLAGScmd | CONFIGclear);

	/* verify that the ARCnet signature byte is present */
	if (get_buffer_byte(dev, 0) != TESTvalue) {
		BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
		return 1;
	}
	/* enable extended (512-byte) packets */
	ACOMMAND(CONFIGcmd | EXTconf);

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

static void com90io_command(struct net_device *dev, int cmd)
{
	short ioaddr = dev->base_addr;

	ACOMMAND(cmd);
}

static int com90io_status(struct net_device *dev)
{
	short ioaddr = dev->base_addr;

	return ASTATUS();
}

static void com90io_setmask(struct net_device *dev, int mask)
{
	short ioaddr = dev->base_addr;

	AINTMASK(mask);
}

static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count)
{
	TIME("put_whole_buffer", count, put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
}

static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
				   void *buf, int count)
{
	TIME("get_whole_buffer", count, get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
}

static int io;			/* use the insmod io= irq= shmem= options */
static int irq;
static char device[9];		/* use eg. device=arc1 to change name */

module_param(io, int, 0);
module_param(irq, int, 0);
module_param_string(device, device, sizeof(device), 0);
MODULE_LICENSE("GPL");

#ifndef MODULE
static int __init com90io_setup(char *s)
{
	int ints[4];

	s = get_options(s, 4, ints);
	if (!ints[0])
		return 0;
	switch (ints[0]) {
	default:		/* ERROR */
		printk("com90io: Too many arguments.\n");
	case 2:		/* IRQ */
		irq = ints[2];
	case 1:		/* IO address */
		io = ints[1];
	}
	if (*s)
		snprintf(device, sizeof(device), "%s", s);
	return 1;
}
__setup("com90io=", com90io_setup);
#endif

static struct net_device *my_dev;

static int __init com90io_init(void)
{
	struct net_device *dev;
	int err;

	dev = alloc_arcdev(device);
	if (!dev)
		return -ENOMEM;

	dev->base_addr = io;
	dev->irq = irq;
	if (dev->irq == 2)
		dev->irq = 9;

	err = com90io_probe(dev);

	if (err) {
		free_netdev(dev);
		return err;
	}

	my_dev = dev;
	return 0;
}

static void __exit com90io_exit(void)
{
	struct net_device *dev = my_dev;
	int ioaddr = dev->base_addr;

	unregister_netdev(dev);

	/* Set the thing back to MMAP mode, in case the old driver is loaded later */
	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);

	free_irq(dev->irq, dev);
	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	free_netdev(dev);
}

module_init(com90io_init)
module_exit(com90io_exit)
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
cb334648	3	*
1da177e4 LT	4	* Written 1997 by David Woodhouse.
	5	* Written 1994-1999 by Avery Pennarun.
	6	* Written 1999-2000 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	*/
	28	#include <linux/kernel.h>
	29	#include <linux/module.h>
	30	#include <linux/moduleparam.h>
	31	#include <linux/ioport.h>
1da177e4 LT	32	#include <linux/delay.h>
	33	#include <linux/netdevice.h>
	34	#include <linux/bootmem.h>
	35	#include <linux/init.h>
a6b7a407	36	#include <linux/interrupt.h>
5e7ef913	37	#include <linux/io.h>
1da177e4 LT	38	#include <linux/arcdevice.h>
1da177e4 LT	39
1da177e4 LT	40	#define VERSION "arcnet: COM90xx IO-mapped mode support (by David Woodhouse et el.)\n"
1da177e4 LT	41
1da177e4 LT	42	/* Internal function declarations */
	43
	44	static int com90io_found(struct net_device *dev);
	45	static void com90io_command(struct net_device *dev, int command);
	46	static int com90io_status(struct net_device *dev);
	47	static void com90io_setmask(struct net_device *dev, int mask);
	48	static int com90io_reset(struct net_device *dev, int really_reset);
	49	static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
	50	void *buf, int count);
	51	static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
	52	void *buf, int count);
	53
1da177e4 LT	54	/* Handy defines for ARCnet specific stuff */
	55
	56	/* The number of low I/O ports used by the card. */
	57	#define ARCNET_TOTAL_SIZE 16
	58
	59	/* COM 9026 controller chip --> ARCnet register addresses */
cb334648 JP	60	#define _INTMASK (ioaddr + 0) /* writable */
	61	#define _STATUS (ioaddr + 0) /* readable */
	62	#define _COMMAND (ioaddr + 1) /* writable, returns random vals on read (?) */
	63	#define _RESET (ioaddr + 8) /* software reset (on read) */
	64	#define _MEMDATA (ioaddr + 12) /* Data port for IO-mapped memory */
	65	#define _ADDR_HI (ioaddr + 15) /* Control registers for said */
	66	#define _ADDR_LO (ioaddr + 14)
	67	#define _CONFIG (ioaddr + 2) /* Configuration register */
1da177e4 LT	68
	69	#undef ASTATUS
	70	#undef ACOMMAND
	71	#undef AINTMASK
	72
	73	#define ASTATUS() inb(_STATUS)
cb334648 JP	74	#define ACOMMAND(cmd) outb((cmd), _COMMAND)
	75	#define AINTMASK(msk) outb((msk), _INTMASK)
	76	#define SETCONF() outb((lp->config), _CONFIG)
1da177e4	77
1da177e4 LT	78	/****************************************************************************
	79	* *
	80	* IO-mapped operation routines *
	81	* *
	82	****************************************************************************/
	83
	84	#undef ONE_AT_A_TIME_TX
	85	#undef ONE_AT_A_TIME_RX
	86
	87	static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
	88	{
	89	int ioaddr = dev->base_addr;
	90
	91	outb(offset >> 8, _ADDR_HI);
	92	outb(offset & 0xff, _ADDR_LO);
	93
	94	return inb(_MEMDATA);
	95	}
	96
	97	#ifdef ONE_AT_A_TIME_TX
	98	static void put_buffer_byte(struct net_device *dev, unsigned offset, u_char datum)
	99	{
	100	int ioaddr = dev->base_addr;
	101
	102	outb(offset >> 8, _ADDR_HI);
	103	outb(offset & 0xff, _ADDR_LO);
	104
	105	outb(datum, _MEMDATA);
	106	}
	107
	108	#endif
	109
1da177e4 LT	110	static void get_whole_buffer(struct net_device dev, unsigned offset, unsigned length, char dest)
	111	{
	112	int ioaddr = dev->base_addr;
	113
	114	outb((offset >> 8) \| AUTOINCflag, _ADDR_HI);
	115	outb(offset & 0xff, _ADDR_LO);
	116
	117	while (length--)
	118	#ifdef ONE_AT_A_TIME_RX
	119	*(dest++) = get_buffer_byte(dev, offset++);
	120	#else
	121	*(dest++) = inb(_MEMDATA);
	122	#endif
	123	}
	124
	125	static void put_whole_buffer(struct net_device dev, unsigned offset, unsigned length, char dest)
	126	{
	127	int ioaddr = dev->base_addr;
	128
	129	outb((offset >> 8) \| AUTOINCflag, _ADDR_HI);
	130	outb(offset & 0xff, _ADDR_LO);
	131
	132	while (length--)
	133	#ifdef ONE_AT_A_TIME_TX
	134	put_buffer_byte(dev, offset++, *(dest++));
	135	#else
	136	outb(*(dest++), _MEMDATA);
	137	#endif
	138	}
	139
	140	/*
	141	* We cannot probe for an IO mapped card either, although we can check that
	142	* it's where we were told it was, and even autoirq
	143	*/
	144	static int __init com90io_probe(struct net_device *dev)
	145	{
	146	int ioaddr = dev->base_addr, status;
	147	unsigned long airqmask;
	148
	149	BUGLVL(D_NORMAL) printk(VERSION);
	150	BUGLVL(D_NORMAL) printk("E-mail me if you actually test this driver, please!\n");
	151
	152	if (!ioaddr) {
3b4e5551	153	BUGMSG(D_NORMAL, "No autoprobe for IO mapped cards; you must specify the base address!\n");
1da177e4 LT	154	return -ENODEV;
	155	}
	156	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
fb911ee8	157	BUGMSG(D_INIT_REASONS, "IO request_region %x-%x failed.\n",
1da177e4 LT	158	ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
	159	return -ENXIO;
	160	}
	161	if (ASTATUS() == 0xFF) {
	162	BUGMSG(D_INIT_REASONS, "IO address %x empty\n", ioaddr);
	163	goto err_out;
	164	}
	165	inb(_RESET);
	166	mdelay(RESETtime);
	167
	168	status = ASTATUS();
	169
	170	if ((status & 0x9D) != (NORXflag \| RECONflag \| TXFREEflag \| RESETflag)) {
	171	BUGMSG(D_INIT_REASONS, "Status invalid (%Xh).\n", status);
	172	goto err_out;
	173	}
	174	BUGMSG(D_INIT_REASONS, "Status after reset: %X\n", status);
	175
	176	ACOMMAND(CFLAGScmd \| RESETclear \| CONFIGclear);
	177
	178	BUGMSG(D_INIT_REASONS, "Status after reset acknowledged: %X\n", status);
	179
	180	status = ASTATUS();
	181
	182	if (status & RESETflag) {
	183	BUGMSG(D_INIT_REASONS, "Eternal reset (status=%Xh)\n", status);
	184	goto err_out;
	185	}
	186	outb((0x16 \| IOMAPflag) & ~ENABLE16flag, _CONFIG);
	187
	188	/* Read first loc'n of memory */
	189
	190	outb(AUTOINCflag, _ADDR_HI);
	191	outb(0, _ADDR_LO);
	192
	193	if ((status = inb(_MEMDATA)) != 0xd1) {
3b4e5551 JP	194	BUGMSG(D_INIT_REASONS, "Signature byte not found (%Xh instead).\n",
3b4e5551 JP	195	status);
1da177e4 LT	196	goto err_out;
	197	}
	198	if (!dev->irq) {
	199	/*
	200	* if we do this, we're sure to get an IRQ since the
	201	* card has just reset and the NORXflag is on until
	202	* we tell it to start receiving.
	203	*/
	204
	205	airqmask = probe_irq_on();
	206	outb(NORXflag, _INTMASK);
	207	udelay(1);
	208	outb(0, _INTMASK);
	209	dev->irq = probe_irq_off(airqmask);
	210
0a6efc78	211	if ((int)dev->irq <= 0) {
1da177e4 LT	212	BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed\n");
	213	goto err_out;
	214	}
	215	}
	216	release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
	217	return com90io_found(dev);
	218
	219	err_out:
	220	release_region(ioaddr, ARCNET_TOTAL_SIZE);
	221	return -ENODEV;
	222	}
	223
1da177e4 LT	224	/* Set up the struct net_device associated with this card. Called after
	225	* probing succeeds.
	226	*/
	227	static int __init com90io_found(struct net_device *dev)
	228	{
	229	struct arcnet_local *lp;
	230	int ioaddr = dev->base_addr;
	231	int err;
	232
	233	/* Reserve the irq */
a0607fd3	234	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) {
1da177e4 LT	235	BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
	236	return -ENODEV;
	237	}
fb911ee8	238	/* Reserve the I/O region */
1da177e4 LT	239	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) {
	240	free_irq(dev->irq, dev);
	241	return -EBUSY;
	242	}
	243
454d7c9b	244	lp = netdev_priv(dev);
1da177e4 LT	245	lp->card_name = "COM90xx I/O";
	246	lp->hw.command = com90io_command;
	247	lp->hw.status = com90io_status;
	248	lp->hw.intmask = com90io_setmask;
	249	lp->hw.reset = com90io_reset;
	250	lp->hw.owner = THIS_MODULE;
	251	lp->hw.copy_to_card = com90io_copy_to_card;
	252	lp->hw.copy_from_card = com90io_copy_from_card;
	253
	254	lp->config = (0x16 \| IOMAPflag) & ~ENABLE16flag;
	255	SETCONF();
	256
	257	/* get and check the station ID from offset 1 in shmem */
	258
	259	dev->dev_addr[0] = get_buffer_byte(dev, 1);
	260
	261	err = register_netdev(dev);
	262	if (err) {
	263	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
	264	free_irq(dev->irq, dev);
	265	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	266	return err;
	267	}
	268
	269	BUGMSG(D_NORMAL, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
	270	dev->dev_addr[0], dev->base_addr, dev->irq);
	271
	272	return 0;
	273	}
	274
1da177e4 LT	275	/*
	276	* Do a hardware reset on the card, and set up necessary registers.
	277	*
	278	* This should be called as little as possible, because it disrupts the
	279	* token on the network (causes a RECON) and requires a significant delay.
	280	*
	281	* However, it does make sure the card is in a defined state.
	282	*/
	283	static int com90io_reset(struct net_device *dev, int really_reset)
	284	{
454d7c9b	285	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	286	short ioaddr = dev->base_addr;
	287
	288	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());
	289
	290	if (really_reset) {
	291	/* reset the card */
	292	inb(_RESET);
	293	mdelay(RESETtime);
	294	}
	295	/* Set the thing to IO-mapped, 8-bit mode */
	296	lp->config = (0x1C \| IOMAPflag) & ~ENABLE16flag;
	297	SETCONF();
	298
	299	ACOMMAND(CFLAGScmd \| RESETclear); /* clear flags & end reset */
	300	ACOMMAND(CFLAGScmd \| CONFIGclear);
	301
	302	/* verify that the ARCnet signature byte is present */
	303	if (get_buffer_byte(dev, 0) != TESTvalue) {
	304	BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
	305	return 1;
	306	}
	307	/* enable extended (512-byte) packets */
	308	ACOMMAND(CONFIGcmd \| EXTconf);
	309
	310	/* done! return success. */
	311	return 0;
	312	}
	313
1da177e4 LT	314	static void com90io_command(struct net_device *dev, int cmd)
	315	{
	316	short ioaddr = dev->base_addr;
	317
	318	ACOMMAND(cmd);
	319	}
	320
1da177e4 LT	321	static int com90io_status(struct net_device *dev)
	322	{
	323	short ioaddr = dev->base_addr;
	324
	325	return ASTATUS();
	326	}
	327
1da177e4 LT	328	static void com90io_setmask(struct net_device *dev, int mask)
	329	{
	330	short ioaddr = dev->base_addr;
	331
	332	AINTMASK(mask);
	333	}
	334
	335	static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
	336	void *buf, int count)
	337	{
	338	TIME("put_whole_buffer", count, put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
	339	}
	340
1da177e4 LT	341	static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
	342	void *buf, int count)
	343	{
	344	TIME("get_whole_buffer", count, get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
	345	}
	346
	347	static int io; /* use the insmod io= irq= shmem= options */
	348	static int irq;
	349	static char device[9]; /* use eg. device=arc1 to change name */
	350
	351	module_param(io, int, 0);
	352	module_param(irq, int, 0);
	353	module_param_string(device, device, sizeof(device), 0);
	354	MODULE_LICENSE("GPL");
	355
	356	#ifndef MODULE
	357	static int __init com90io_setup(char *s)
	358	{
	359	int ints[4];
01a1d5ac	360
1da177e4 LT	361	s = get_options(s, 4, ints);
	362	if (!ints[0])
	363	return 0;
	364	switch (ints[0]) {
	365	default: /* ERROR */
	366	printk("com90io: Too many arguments.\n");
	367	case 2: /* IRQ */
	368	irq = ints[2];
	369	case 1: /* IO address */
	370	io = ints[1];
	371	}
	372	if (*s)
	373	snprintf(device, sizeof(device), "%s", s);
	374	return 1;
	375	}
	376	__setup("com90io=", com90io_setup);
	377	#endif
	378
	379	static struct net_device *my_dev;
	380
	381	static int __init com90io_init(void)
	382	{
	383	struct net_device *dev;
	384	int err;
	385
	386	dev = alloc_arcdev(device);
	387	if (!dev)
	388	return -ENOMEM;
	389
1da177e4 LT	390	dev->base_addr = io;
	391	dev->irq = irq;
	392	if (dev->irq == 2)
	393	dev->irq = 9;
	394
	395	err = com90io_probe(dev);
	396
	397	if (err) {
	398	free_netdev(dev);
	399	return err;
	400	}
	401
	402	my_dev = dev;
	403	return 0;
	404	}
	405
	406	static void __exit com90io_exit(void)
	407	{
	408	struct net_device *dev = my_dev;
	409	int ioaddr = dev->base_addr;
	410
	411	unregister_netdev(dev);
	412
	413	/* Set the thing back to MMAP mode, in case the old driver is loaded later */
	414	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
	415
	416	free_irq(dev->irq, dev);
	417	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	418	free_netdev(dev);
	419	}
	420
	421	module_init(com90io_init)
	422	module_exit(com90io_exit)