[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);

	/* 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	*/
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);
	52	static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
	53	void *buf, int count);
	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
	99	static void put_buffer_byte(struct net_device *dev, unsigned offset, u_char datum)
	100	{
	101	int ioaddr = dev->base_addr;
	102
	103	outb(offset >> 8, _ADDR_HI);
	104	outb(offset & 0xff, _ADDR_LO);
	105
	106	outb(datum, _MEMDATA);
	107	}
	108
	109	#endif
	110
1da177e4 LT	111	static void get_whole_buffer(struct net_device dev, unsigned offset, unsigned length, char dest)
	112	{
	113	int ioaddr = dev->base_addr;
	114
	115	outb((offset >> 8) \| AUTOINCflag, _ADDR_HI);
	116	outb(offset & 0xff, _ADDR_LO);
	117
	118	while (length--)
	119	#ifdef ONE_AT_A_TIME_RX
	120	*(dest++) = get_buffer_byte(dev, offset++);
	121	#else
	122	*(dest++) = inb(_MEMDATA);
	123	#endif
	124	}
	125
	126	static void put_whole_buffer(struct net_device dev, unsigned offset, unsigned length, char dest)
	127	{
	128	int ioaddr = dev->base_addr;
	129
	130	outb((offset >> 8) \| AUTOINCflag, _ADDR_HI);
	131	outb(offset & 0xff, _ADDR_LO);
	132
	133	while (length--)
	134	#ifdef ONE_AT_A_TIME_TX
	135	put_buffer_byte(dev, offset++, *(dest++));
	136	#else
	137	outb(*(dest++), _MEMDATA);
	138	#endif
	139	}
	140
f2f0a16b	141	/* We cannot probe for an IO mapped card either, although we can check that
1da177e4 LT	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
72aeea48	149	if (BUGLVL(D_NORMAL)) {
05a24b23 JP	150	pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
05a24b23 JP	151	pr_info("E-mail me if you actually test this driver, please!\n");
72aeea48	152	}
1da177e4 LT	153
1da177e4 LT	154	if (!ioaddr) {
a34c0932	155	arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
1da177e4 LT	156	return -ENODEV;
	157	}
	158	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
a34c0932 JP	159	arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
a34c0932 JP	160	ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
1da177e4 LT	161	return -ENXIO;
	162	}
	163	if (ASTATUS() == 0xFF) {
a34c0932 JP	164	arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
a34c0932 JP	165	ioaddr);
1da177e4 LT	166	goto err_out;
	167	}
	168	inb(_RESET);
	169	mdelay(RESETtime);
	170
	171	status = ASTATUS();
	172
	173	if ((status & 0x9D) != (NORXflag \| RECONflag \| TXFREEflag \| RESETflag)) {
a34c0932 JP	174	arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
a34c0932 JP	175	status);
1da177e4 LT	176	goto err_out;
1da177e4 LT	177	}
a34c0932	178	arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
1da177e4 LT	179
	180	ACOMMAND(CFLAGScmd \| RESETclear \| CONFIGclear);
	181
a34c0932 JP	182	arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
a34c0932 JP	183	status);
1da177e4 LT	184
	185	status = ASTATUS();
	186
	187	if (status & RESETflag) {
a34c0932 JP	188	arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
a34c0932 JP	189	status);
1da177e4 LT	190	goto err_out;
	191	}
	192	outb((0x16 \| IOMAPflag) & ~ENABLE16flag, _CONFIG);
	193
	194	/* Read first loc'n of memory */
	195
	196	outb(AUTOINCflag, _ADDR_HI);
	197	outb(0, _ADDR_LO);
	198
97464edd JP	199	status = inb(_MEMDATA);
97464edd JP	200	if (status != 0xd1) {
a34c0932 JP	201	arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
a34c0932 JP	202	status);
1da177e4 LT	203	goto err_out;
	204	}
	205	if (!dev->irq) {
f2f0a16b	206	/* if we do this, we're sure to get an IRQ since the
1da177e4 LT	207	* card has just reset and the NORXflag is on until
	208	* we tell it to start receiving.
	209	*/
	210
	211	airqmask = probe_irq_on();
	212	outb(NORXflag, _INTMASK);
	213	udelay(1);
	214	outb(0, _INTMASK);
	215	dev->irq = probe_irq_off(airqmask);
	216
0a6efc78	217	if ((int)dev->irq <= 0) {
a34c0932	218	arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
1da177e4 LT	219	goto err_out;
	220	}
	221	}
	222	release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
	223	return com90io_found(dev);
	224
	225	err_out:
	226	release_region(ioaddr, ARCNET_TOTAL_SIZE);
	227	return -ENODEV;
	228	}
	229
1da177e4 LT	230	/* Set up the struct net_device associated with this card. Called after
	231	* probing succeeds.
	232	*/
	233	static int __init com90io_found(struct net_device *dev)
	234	{
	235	struct arcnet_local *lp;
	236	int ioaddr = dev->base_addr;
	237	int err;
	238
	239	/* Reserve the irq */
a0607fd3	240	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) {
a34c0932	241	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	242	return -ENODEV;
1da177e4 LT	243	}
fb911ee8	244	/* Reserve the I/O region */
1da177e4 LT	245	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) {
	246	free_irq(dev->irq, dev);
	247	return -EBUSY;
	248	}
	249
454d7c9b	250	lp = netdev_priv(dev);
1da177e4 LT	251	lp->card_name = "COM90xx I/O";
	252	lp->hw.command = com90io_command;
	253	lp->hw.status = com90io_status;
	254	lp->hw.intmask = com90io_setmask;
	255	lp->hw.reset = com90io_reset;
	256	lp->hw.owner = THIS_MODULE;
	257	lp->hw.copy_to_card = com90io_copy_to_card;
	258	lp->hw.copy_from_card = com90io_copy_from_card;
	259
	260	lp->config = (0x16 \| IOMAPflag) & ~ENABLE16flag;
	261	SETCONF();
	262
	263	/* get and check the station ID from offset 1 in shmem */
	264
	265	dev->dev_addr[0] = get_buffer_byte(dev, 1);
	266
	267	err = register_netdev(dev);
	268	if (err) {
	269	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
	270	free_irq(dev->irq, dev);
	271	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	272	return err;
	273	}
	274
a34c0932 JP	275	arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
a34c0932 JP	276	dev->dev_addr[0], dev->base_addr, dev->irq);
1da177e4 LT	277
	278	return 0;
	279	}
	280
f2f0a16b	281	/* Do a hardware reset on the card, and set up necessary registers.
1da177e4 LT	282	*
	283	* This should be called as little as possible, because it disrupts the
	284	* token on the network (causes a RECON) and requires a significant delay.
	285	*
	286	* However, it does make sure the card is in a defined state.
	287	*/
	288	static int com90io_reset(struct net_device *dev, int really_reset)
	289	{
454d7c9b	290	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	291	short ioaddr = dev->base_addr;
1da177e4 LT	292
a34c0932 JP	293	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
a34c0932 JP	294	dev->name, ASTATUS());
1da177e4 LT	295
	296	if (really_reset) {
	297	/* reset the card */
	298	inb(_RESET);
	299	mdelay(RESETtime);
	300	}
	301	/* Set the thing to IO-mapped, 8-bit mode */
	302	lp->config = (0x1C \| IOMAPflag) & ~ENABLE16flag;
	303	SETCONF();
	304
	305	ACOMMAND(CFLAGScmd \| RESETclear); /* clear flags & end reset */
	306	ACOMMAND(CFLAGScmd \| CONFIGclear);
	307
	308	/* verify that the ARCnet signature byte is present */
	309	if (get_buffer_byte(dev, 0) != TESTvalue) {
a34c0932	310	arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
1da177e4 LT	311	return 1;
	312	}
	313	/* enable extended (512-byte) packets */
	314	ACOMMAND(CONFIGcmd \| EXTconf);
	315
	316	/* done! return success. */
	317	return 0;
	318	}
	319
1da177e4 LT	320	static void com90io_command(struct net_device *dev, int cmd)
	321	{
	322	short ioaddr = dev->base_addr;
	323
	324	ACOMMAND(cmd);
	325	}
	326
1da177e4 LT	327	static int com90io_status(struct net_device *dev)
	328	{
	329	short ioaddr = dev->base_addr;
	330
	331	return ASTATUS();
	332	}
	333
1da177e4 LT	334	static void com90io_setmask(struct net_device *dev, int mask)
	335	{
	336	short ioaddr = dev->base_addr;
	337
	338	AINTMASK(mask);
	339	}
	340
	341	static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
	342	void *buf, int count)
	343	{
a34c0932 JP	344	TIME(dev, "put_whole_buffer", count,
a34c0932 JP	345	put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	346	}
1da177e4 LT	347
1da177e4 LT	348	static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
	349	void *buf, int count)
	350	{
a34c0932 JP	351	TIME(dev, "get_whole_buffer", count,
a34c0932 JP	352	get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	353	}
	354
	355	static int io; /* use the insmod io= irq= shmem= options */
	356	static int irq;
	357	static char device[9]; /* use eg. device=arc1 to change name */
	358
	359	module_param(io, int, 0);
	360	module_param(irq, int, 0);
	361	module_param_string(device, device, sizeof(device), 0);
	362	MODULE_LICENSE("GPL");
	363
	364	#ifndef MODULE
	365	static int __init com90io_setup(char *s)
	366	{
	367	int ints[4];
01a1d5ac	368
1da177e4 LT	369	s = get_options(s, 4, ints);
	370	if (!ints[0])
	371	return 0;
	372	switch (ints[0]) {
	373	default: /* ERROR */
05a24b23	374	pr_err("Too many arguments\n");
1da177e4 LT	375	case 2: /* IRQ */
	376	irq = ints[2];
	377	case 1: /* IO address */
	378	io = ints[1];
	379	}
	380	if (*s)
	381	snprintf(device, sizeof(device), "%s", s);
	382	return 1;
	383	}
	384	__setup("com90io=", com90io_setup);
	385	#endif
	386
	387	static struct net_device *my_dev;
	388
	389	static int __init com90io_init(void)
	390	{
	391	struct net_device *dev;
	392	int err;
	393
	394	dev = alloc_arcdev(device);
	395	if (!dev)
	396	return -ENOMEM;
	397
1da177e4 LT	398	dev->base_addr = io;
	399	dev->irq = irq;
	400	if (dev->irq == 2)
	401	dev->irq = 9;
	402
	403	err = com90io_probe(dev);
	404
	405	if (err) {
	406	free_netdev(dev);
	407	return err;
	408	}
	409
	410	my_dev = dev;
	411	return 0;
	412	}
	413
	414	static void __exit com90io_exit(void)
	415	{
	416	struct net_device *dev = my_dev;
	417	int ioaddr = dev->base_addr;
	418
	419	unregister_netdev(dev);
	420
	421	/* Set the thing back to MMAP mode, in case the old driver is loaded later */
	422	outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
	423
	424	free_irq(dev->irq, dev);
	425	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	426	free_netdev(dev);
	427	}
	428
	429	module_init(com90io_init)
	430	module_exit(com90io_exit)