[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
 *
 * **********************
 */

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

#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>

/* 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;

	if (BUGLVL(D_NORMAL)) {
		pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
		pr_info("E-mail me if you actually test this driver, please!\n");
	}

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

	status = ASTATUS();

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

	ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);

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

	status = ASTATUS();

	if (status & RESETflag) {
		arc_printk(D_INIT_REASONS, dev, "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);

	status = inb(_MEMDATA);
	if (status != 0xd1) {
		arc_printk(D_INIT_REASONS, dev, "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) {
			arc_printk(D_INIT_REASONS, dev, "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)) {
		arc_printk(D_NORMAL, dev, "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;
	}

	arc_printk(D_NORMAL, dev, "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;

	arc_printk(D_INIT, dev, "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) {
		arc_printk(D_NORMAL, dev, "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(dev, "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(dev, "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 */
		pr_err("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);

	/* In case the old driver is loaded later,
	 * set the thing back to MMAP mode
	 */
	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	*/
05a24b23 JP	28
	29	#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
	30
1da177e4 LT	31	#include <linux/kernel.h>
	32	#include <linux/module.h>
	33	#include <linux/moduleparam.h>
	34	#include <linux/ioport.h>
1da177e4 LT	35	#include <linux/delay.h>
	36	#include <linux/netdevice.h>
	37	#include <linux/bootmem.h>
	38	#include <linux/init.h>
a6b7a407	39	#include <linux/interrupt.h>
5e7ef913	40	#include <linux/io.h>
1da177e4 LT	41	#include <linux/arcdevice.h>
1da177e4 LT	42
1da177e4 LT	43	/* Internal function declarations */
	44
	45	static int com90io_found(struct net_device *dev);
	46	static void com90io_command(struct net_device *dev, int command);
	47	static int com90io_status(struct net_device *dev);
	48	static void com90io_setmask(struct net_device *dev, int mask);
	49	static int com90io_reset(struct net_device *dev, int really_reset);
	50	static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
	51	void *buf, int count);
d6d7d3ed JP	52	static void com90io_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	53	int offset, void *buf, int count);
1da177e4	54
1da177e4 LT	55	/* Handy defines for ARCnet specific stuff */
	56
	57	/* The number of low I/O ports used by the card. */
	58	#define ARCNET_TOTAL_SIZE 16
	59
	60	/* COM 9026 controller chip --> ARCnet register addresses */
cb334648 JP	61	#define _INTMASK (ioaddr + 0) /* writable */
	62	#define _STATUS (ioaddr + 0) /* readable */
	63	#define _COMMAND (ioaddr + 1) /* writable, returns random vals on read (?) */
	64	#define _RESET (ioaddr + 8) /* software reset (on read) */
	65	#define _MEMDATA (ioaddr + 12) /* Data port for IO-mapped memory */
	66	#define _ADDR_HI (ioaddr + 15) /* Control registers for said */
	67	#define _ADDR_LO (ioaddr + 14)
	68	#define _CONFIG (ioaddr + 2) /* Configuration register */
1da177e4 LT	69
	70	#undef ASTATUS
	71	#undef ACOMMAND
	72	#undef AINTMASK
	73
	74	#define ASTATUS() inb(_STATUS)
cb334648 JP	75	#define ACOMMAND(cmd) outb((cmd), _COMMAND)
	76	#define AINTMASK(msk) outb((msk), _INTMASK)
	77	#define SETCONF() outb((lp->config), _CONFIG)
1da177e4	78
1da177e4 LT	79	/****************************************************************************
	80	* *
	81	* IO-mapped operation routines *
	82	* *
	83	****************************************************************************/
	84
	85	#undef ONE_AT_A_TIME_TX
	86	#undef ONE_AT_A_TIME_RX
	87
	88	static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
	89	{
	90	int ioaddr = dev->base_addr;
	91
	92	outb(offset >> 8, _ADDR_HI);
	93	outb(offset & 0xff, _ADDR_LO);
	94
	95	return inb(_MEMDATA);
	96	}
	97
	98	#ifdef ONE_AT_A_TIME_TX
d6d7d3ed JP	99	static void put_buffer_byte(struct net_device *dev, unsigned offset,
d6d7d3ed JP	100	u_char datum)
1da177e4 LT	101	{
	102	int ioaddr = dev->base_addr;
	103
	104	outb(offset >> 8, _ADDR_HI);
	105	outb(offset & 0xff, _ADDR_LO);
	106
	107	outb(datum, _MEMDATA);
	108	}
	109
	110	#endif
	111
d6d7d3ed JP	112	static void get_whole_buffer(struct net_device *dev, unsigned offset,
d6d7d3ed JP	113	unsigned length, char *dest)
1da177e4 LT	114	{
	115	int ioaddr = dev->base_addr;
	116
	117	outb((offset >> 8) \| AUTOINCflag, _ADDR_HI);
	118	outb(offset & 0xff, _ADDR_LO);
	119
	120	while (length--)
	121	#ifdef ONE_AT_A_TIME_RX
	122	*(dest++) = get_buffer_byte(dev, offset++);
	123	#else
	124	*(dest++) = inb(_MEMDATA);
	125	#endif
	126	}
	127
d6d7d3ed JP	128	static void put_whole_buffer(struct net_device *dev, unsigned offset,
d6d7d3ed JP	129	unsigned length, char *dest)
1da177e4 LT	130	{
	131	int ioaddr = dev->base_addr;
	132
	133	outb((offset >> 8) \| AUTOINCflag, _ADDR_HI);
	134	outb(offset & 0xff, _ADDR_LO);
	135
	136	while (length--)
	137	#ifdef ONE_AT_A_TIME_TX
	138	put_buffer_byte(dev, offset++, *(dest++));
	139	#else
	140	outb(*(dest++), _MEMDATA);
	141	#endif
	142	}
	143
f2f0a16b	144	/* We cannot probe for an IO mapped card either, although we can check that
1da177e4 LT	145	* it's where we were told it was, and even autoirq
	146	*/
	147	static int __init com90io_probe(struct net_device *dev)
	148	{
	149	int ioaddr = dev->base_addr, status;
	150	unsigned long airqmask;
	151
72aeea48	152	if (BUGLVL(D_NORMAL)) {
05a24b23 JP	153	pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
05a24b23 JP	154	pr_info("E-mail me if you actually test this driver, please!\n");
72aeea48	155	}
1da177e4 LT	156
1da177e4 LT	157	if (!ioaddr) {
a34c0932	158	arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
1da177e4 LT	159	return -ENODEV;
	160	}
	161	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
a34c0932 JP	162	arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
a34c0932 JP	163	ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
1da177e4 LT	164	return -ENXIO;
	165	}
	166	if (ASTATUS() == 0xFF) {
a34c0932 JP	167	arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
a34c0932 JP	168	ioaddr);
1da177e4 LT	169	goto err_out;
	170	}
	171	inb(_RESET);
	172	mdelay(RESETtime);
	173
	174	status = ASTATUS();
	175
	176	if ((status & 0x9D) != (NORXflag \| RECONflag \| TXFREEflag \| RESETflag)) {
a34c0932 JP	177	arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
a34c0932 JP	178	status);
1da177e4 LT	179	goto err_out;
1da177e4 LT	180	}
a34c0932	181	arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
1da177e4 LT	182
	183	ACOMMAND(CFLAGScmd \| RESETclear \| CONFIGclear);
	184
a34c0932 JP	185	arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
a34c0932 JP	186	status);
1da177e4 LT	187
	188	status = ASTATUS();
	189
	190	if (status & RESETflag) {
a34c0932 JP	191	arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
a34c0932 JP	192	status);
1da177e4 LT	193	goto err_out;
	194	}
	195	outb((0x16 \| IOMAPflag) & ~ENABLE16flag, _CONFIG);
	196
	197	/* Read first loc'n of memory */
	198
	199	outb(AUTOINCflag, _ADDR_HI);
	200	outb(0, _ADDR_LO);
	201
97464edd JP	202	status = inb(_MEMDATA);
97464edd JP	203	if (status != 0xd1) {
a34c0932 JP	204	arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
a34c0932 JP	205	status);
1da177e4 LT	206	goto err_out;
	207	}
	208	if (!dev->irq) {
f2f0a16b	209	/* if we do this, we're sure to get an IRQ since the
1da177e4 LT	210	* card has just reset and the NORXflag is on until
	211	* we tell it to start receiving.
	212	*/
	213
	214	airqmask = probe_irq_on();
	215	outb(NORXflag, _INTMASK);
	216	udelay(1);
	217	outb(0, _INTMASK);
	218	dev->irq = probe_irq_off(airqmask);
	219
0a6efc78	220	if ((int)dev->irq <= 0) {
a34c0932	221	arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
1da177e4 LT	222	goto err_out;
	223	}
	224	}
	225	release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
	226	return com90io_found(dev);
	227
	228	err_out:
	229	release_region(ioaddr, ARCNET_TOTAL_SIZE);
	230	return -ENODEV;
	231	}
	232
1da177e4 LT	233	/* Set up the struct net_device associated with this card. Called after
	234	* probing succeeds.
	235	*/
	236	static int __init com90io_found(struct net_device *dev)
	237	{
	238	struct arcnet_local *lp;
	239	int ioaddr = dev->base_addr;
	240	int err;
	241
	242	/* Reserve the irq */
d6d7d3ed JP	243	if (request_irq(dev->irq, arcnet_interrupt, 0,
d6d7d3ed JP	244	"arcnet (COM90xx-IO)", dev)) {
a34c0932	245	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	246	return -ENODEV;
1da177e4 LT	247	}
fb911ee8	248	/* Reserve the I/O region */
d6d7d3ed JP	249	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
d6d7d3ed JP	250	"arcnet (COM90xx-IO)")) {
1da177e4 LT	251	free_irq(dev->irq, dev);
	252	return -EBUSY;
	253	}
	254
454d7c9b	255	lp = netdev_priv(dev);
1da177e4 LT	256	lp->card_name = "COM90xx I/O";
	257	lp->hw.command = com90io_command;
	258	lp->hw.status = com90io_status;
	259	lp->hw.intmask = com90io_setmask;
	260	lp->hw.reset = com90io_reset;
	261	lp->hw.owner = THIS_MODULE;
	262	lp->hw.copy_to_card = com90io_copy_to_card;
	263	lp->hw.copy_from_card = com90io_copy_from_card;
	264
	265	lp->config = (0x16 \| IOMAPflag) & ~ENABLE16flag;
	266	SETCONF();
	267
	268	/* get and check the station ID from offset 1 in shmem */
	269
	270	dev->dev_addr[0] = get_buffer_byte(dev, 1);
	271
	272	err = register_netdev(dev);
	273	if (err) {
	274	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
	275	free_irq(dev->irq, dev);
	276	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	277	return err;
	278	}
	279
a34c0932 JP	280	arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
a34c0932 JP	281	dev->dev_addr[0], dev->base_addr, dev->irq);
1da177e4 LT	282
	283	return 0;
	284	}
	285
f2f0a16b	286	/* Do a hardware reset on the card, and set up necessary registers.
1da177e4 LT	287	*
	288	* This should be called as little as possible, because it disrupts the
	289	* token on the network (causes a RECON) and requires a significant delay.
	290	*
	291	* However, it does make sure the card is in a defined state.
	292	*/
	293	static int com90io_reset(struct net_device *dev, int really_reset)
	294	{
454d7c9b	295	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	296	short ioaddr = dev->base_addr;
1da177e4 LT	297
a34c0932 JP	298	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
a34c0932 JP	299	dev->name, ASTATUS());
1da177e4 LT	300
	301	if (really_reset) {
	302	/* reset the card */
	303	inb(_RESET);
	304	mdelay(RESETtime);
	305	}
	306	/* Set the thing to IO-mapped, 8-bit mode */
	307	lp->config = (0x1C \| IOMAPflag) & ~ENABLE16flag;
	308	SETCONF();
	309
	310	ACOMMAND(CFLAGScmd \| RESETclear); /* clear flags & end reset */
	311	ACOMMAND(CFLAGScmd \| CONFIGclear);
	312
	313	/* verify that the ARCnet signature byte is present */
	314	if (get_buffer_byte(dev, 0) != TESTvalue) {
a34c0932	315	arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
1da177e4 LT	316	return 1;
	317	}
	318	/* enable extended (512-byte) packets */
	319	ACOMMAND(CONFIGcmd \| EXTconf);
	320
	321	/* done! return success. */
	322	return 0;
	323	}
	324
1da177e4 LT	325	static void com90io_command(struct net_device *dev, int cmd)
	326	{
	327	short ioaddr = dev->base_addr;
	328
	329	ACOMMAND(cmd);
	330	}
	331
1da177e4 LT	332	static int com90io_status(struct net_device *dev)
	333	{
	334	short ioaddr = dev->base_addr;
	335
	336	return ASTATUS();
	337	}
	338
1da177e4 LT	339	static void com90io_setmask(struct net_device *dev, int mask)
	340	{
	341	short ioaddr = dev->base_addr;
	342
	343	AINTMASK(mask);
	344	}
	345
d6d7d3ed JP	346	static void com90io_copy_to_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	347	int offset, void *buf, int count)
1da177e4	348	{
a34c0932 JP	349	TIME(dev, "put_whole_buffer", count,
a34c0932 JP	350	put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	351	}
1da177e4 LT	352
d6d7d3ed JP	353	static void com90io_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	354	int offset, void *buf, int count)
1da177e4	355	{
a34c0932 JP	356	TIME(dev, "get_whole_buffer", count,
a34c0932 JP	357	get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	358	}
	359
	360	static int io; /* use the insmod io= irq= shmem= options */
	361	static int irq;
	362	static char device[9]; /* use eg. device=arc1 to change name */
	363
	364	module_param(io, int, 0);
	365	module_param(irq, int, 0);
	366	module_param_string(device, device, sizeof(device), 0);
	367	MODULE_LICENSE("GPL");
	368
	369	#ifndef MODULE
	370	static int __init com90io_setup(char *s)
	371	{
	372	int ints[4];
01a1d5ac	373
1da177e4 LT	374	s = get_options(s, 4, ints);
	375	if (!ints[0])
	376	return 0;
	377	switch (ints[0]) {
	378	default: /* ERROR */
05a24b23	379	pr_err("Too many arguments\n");
1da177e4 LT	380	case 2: /* IRQ */
	381	irq = ints[2];
	382	case 1: /* IO address */
	383	io = ints[1];
	384	}
	385	if (*s)
	386	snprintf(device, sizeof(device), "%s", s);
	387	return 1;
	388	}
	389	__setup("com90io=", com90io_setup);
	390	#endif
	391
	392	static struct net_device *my_dev;
	393
	394	static int __init com90io_init(void)
	395	{
	396	struct net_device *dev;
	397	int err;
	398
	399	dev = alloc_arcdev(device);
	400	if (!dev)
	401	return -ENOMEM;
	402
1da177e4 LT	403	dev->base_addr = io;
	404	dev->irq = irq;
	405	if (dev->irq == 2)
	406	dev->irq = 9;
	407
	408	err = com90io_probe(dev);
	409
	410	if (err) {
	411	free_netdev(dev);
	412	return err;
	413	}
	414
	415	my_dev = dev;
	416	return 0;
	417	}
	418
	419	static void __exit com90io_exit(void)
	420	{
	421	struct net_device *dev = my_dev;
	422	int ioaddr = dev->base_addr;
	423
	424	unregister_netdev(dev);
	425
d6d7d3ed JP	426	/* In case the old driver is loaded later,
	427	* set the thing back to MMAP mode
	428	*/
1da177e4 LT	429	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
	430
	431	free_irq(dev->irq, dev);
	432	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	433	free_netdev(dev);
	434	}
	435
	436	module_init(com90io_init)
	437	module_exit(com90io_exit)