[deliverable/linux.git] / drivers / net / arcnet / arc-rimi.c

/*
 * Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards
 *
 * 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 <asm/io.h>
#include <linux/arcdevice.h>


#define VERSION "arcnet: RIM I (entirely mem-mapped) support\n"


/* Internal function declarations */

static int arcrimi_probe(struct net_device *dev);
static int arcrimi_found(struct net_device *dev);
static void arcrimi_command(struct net_device *dev, int command);
static int arcrimi_status(struct net_device *dev);
static void arcrimi_setmask(struct net_device *dev, int mask);
static int arcrimi_reset(struct net_device *dev, int really_reset);
static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count);
static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
				   void *buf, int count);

/* Handy defines for ARCnet specific stuff */

/* Amount of I/O memory used by the card */
#define BUFFER_SIZE	(512)
#define MIRROR_SIZE	(BUFFER_SIZE * 4)

/* 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()	readb(_STATUS)
#define ACOMMAND(cmd)	writeb((cmd), _COMMAND)
#define AINTMASK(msk)	writeb((msk), _INTMASK)
#define SETCONF()	writeb(lp->config, _CONFIG)


/*
 * We cannot probe for a RIM I card; one reason is I don't know how to reset
 * them.  In fact, we can't even get their node ID automatically.  So, we
 * need to be passed a specific shmem address, IRQ, and node ID.
 */
static int __init arcrimi_probe(struct net_device *dev)
{
	BUGLVL(D_NORMAL) printk(VERSION);
	BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");

	BUGLVL(D_NORMAL) printk("Given: node %02Xh, shmem %lXh, irq %d\n",
				dev->dev_addr[0], dev->mem_start, dev->irq);

	if (dev->mem_start <= 0 || dev->irq <= 0) {
		BUGLVL(D_NORMAL) printk("No autoprobe for RIM I; you "
		       "must specify the shmem and irq!\n");
		return -ENODEV;
	}
	if (dev->dev_addr[0] == 0) {
		BUGLVL(D_NORMAL) printk("You need to specify your card's station "
		       "ID!\n");
		return -ENODEV;
	}
	/*
	 * Grab the memory region at mem_start for MIRROR_SIZE bytes.
	 * Later in arcrimi_found() the real size will be determined
	 * and this reserve will be released and the correct size
	 * will be taken.
	 */
	if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
		BUGLVL(D_NORMAL) printk("Card memory already allocated\n");
		return -ENODEV;
	}
	return arcrimi_found(dev);
}

static int check_mirror(unsigned long addr, size_t size)
{
	void __iomem *p;
	int res = -1;

	if (!request_mem_region(addr, size, "arcnet (90xx)"))
		return -1;

	p = ioremap(addr, size);
	if (p) {
		if (readb(p) == TESTvalue)
			res = 1;
		else
			res = 0;
		iounmap(p);
	}

	release_mem_region(addr, size);
	return res;
}

/*
 * Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init arcrimi_found(struct net_device *dev)
{
	struct arcnet_local *lp;
	unsigned long first_mirror, last_mirror, shmem;
	void __iomem *p;
	int mirror_size;
	int err;

	p = ioremap(dev->mem_start, MIRROR_SIZE);
	if (!p) {
		release_mem_region(dev->mem_start, MIRROR_SIZE);
		BUGMSG(D_NORMAL, "Can't ioremap\n");
		return -ENODEV;
	}

	/* reserve the irq */
	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
		iounmap(p);
		release_mem_region(dev->mem_start, MIRROR_SIZE);
		BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}

	shmem = dev->mem_start;
	writeb(TESTvalue, p);
	writeb(dev->dev_addr[0], p + 1);	/* actually the node ID */

	/* find the real shared memory start/end points, including mirrors */

	/* guess the actual size of one "memory mirror" - the number of
	 * bytes between copies of the shared memory.  On most cards, it's
	 * 2k (or there are no mirrors at all) but on some, it's 4k.
	 */
	mirror_size = MIRROR_SIZE;
	if (readb(p) == TESTvalue &&
	    check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
	    check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
		mirror_size = 2 * MIRROR_SIZE;

	first_mirror = shmem - mirror_size;
	while (check_mirror(first_mirror, mirror_size) == 1)
		first_mirror -= mirror_size;
	first_mirror += mirror_size;

	last_mirror = shmem + mirror_size;
	while (check_mirror(last_mirror, mirror_size) == 1)
		last_mirror += mirror_size;
	last_mirror -= mirror_size;

	dev->mem_start = first_mirror;
	dev->mem_end = last_mirror + MIRROR_SIZE - 1;

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

	lp = netdev_priv(dev);
	lp->card_name = "RIM I";
	lp->hw.command = arcrimi_command;
	lp->hw.status = arcrimi_status;
	lp->hw.intmask = arcrimi_setmask;
	lp->hw.reset = arcrimi_reset;
	lp->hw.owner = THIS_MODULE;
	lp->hw.copy_to_card = arcrimi_copy_to_card;
	lp->hw.copy_from_card = arcrimi_copy_from_card;

	/*
	 * re-reserve the memory region - arcrimi_probe() alloced this reqion
	 * but didn't know the real size.  Free that region and then re-get
	 * with the correct size.  There is a VERY slim chance this could
	 * fail.
	 */
	iounmap(p);
	release_mem_region(shmem, MIRROR_SIZE);
	if (!request_mem_region(dev->mem_start,
				dev->mem_end - dev->mem_start + 1,
				"arcnet (90xx)")) {
		BUGMSG(D_NORMAL, "Card memory already allocated\n");
		goto err_free_irq;
	}

	lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	if (!lp->mem_start) {
		BUGMSG(D_NORMAL, "Can't remap device memory!\n");
		goto err_release_mem;
	}

	/* get and check the station ID from offset 1 in shmem */
	dev->dev_addr[0] = readb(lp->mem_start + 1);

	BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
	       "ShMem %lXh (%ld*%d bytes).\n",
	       dev->dev_addr[0],
	       dev->irq, dev->mem_start,
	 (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);

	err = register_netdev(dev);
	if (err)
		goto err_unmap;

	return 0;

err_unmap:
	iounmap(lp->mem_start);
err_release_mem:
	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
err_free_irq:
	free_irq(dev->irq, dev);
	return -EIO;
}


/*
 * 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 arcrimi_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *ioaddr = lp->mem_start + 0x800;

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

	if (really_reset) {
		writeb(TESTvalue, ioaddr - 0x800);	/* fake reset */
		return 0;
	}
	ACOMMAND(CFLAGScmd | RESETclear);	/* clear flags & end reset */
	ACOMMAND(CFLAGScmd | CONFIGclear);

	/* enable extended (512-byte) packets */
	ACOMMAND(CONFIGcmd | EXTconf);

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

static void arcrimi_setmask(struct net_device *dev, int mask)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *ioaddr = lp->mem_start + 0x800;

	AINTMASK(mask);
}

static int arcrimi_status(struct net_device *dev)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *ioaddr = lp->mem_start + 0x800;

	return ASTATUS();
}

static void arcrimi_command(struct net_device *dev, int cmd)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *ioaddr = lp->mem_start + 0x800;

	ACOMMAND(cmd);
}

static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
	TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
}


static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
				   void *buf, int count)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
	TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
}

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

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

static struct net_device *my_dev;

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

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

	if (node && node != 0xff)
		dev->dev_addr[0] = node;

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

	if (arcrimi_probe(dev)) {
		free_netdev(dev);
		return -EIO;
	}

	my_dev = dev;
	return 0;
}

static void __exit arc_rimi_exit(void)
{
	struct net_device *dev = my_dev;
	struct arcnet_local *lp = netdev_priv(dev);

	unregister_netdev(dev);
	iounmap(lp->mem_start);
	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	free_irq(dev->irq, dev);
	free_netdev(dev);
}

#ifndef MODULE
static int __init arcrimi_setup(char *s)
{
	int ints[8];
	s = get_options(s, 8, ints);
	if (!ints[0])
		return 1;
	switch (ints[0]) {
	default:		/* ERROR */
		printk("arcrimi: Too many arguments.\n");
	case 3:		/* Node ID */
		node = ints[3];
	case 2:		/* IRQ */
		irq = ints[2];
	case 1:		/* IO address */
		io = ints[1];
	}
	if (*s)
		snprintf(device, sizeof(device), "%s", s);
	return 1;
}
__setup("arcrimi=", arcrimi_setup);
#endif				/* MODULE */

module_init(arc_rimi_init)
module_exit(arc_rimi_exit)
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards
cb334648	3	*
1da177e4 LT	4	* Written 1994-1999 by Avery Pennarun.
	5	* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
	6	* Derived from skeleton.c by Donald Becker.
	7	*
	8	* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
	9	* for sponsoring the further development of this driver.
	10	*
	11	* **********************
	12	*
	13	* The original copyright of skeleton.c was as follows:
	14	*
	15	* skeleton.c Written 1993 by Donald Becker.
	16	* Copyright 1993 United States Government as represented by the
	17	* Director, National Security Agency. This software may only be used
	18	* and distributed according to the terms of the GNU General Public License as
	19	* modified by SRC, incorporated herein by reference.
	20	*
	21	* **********************
	22	*
	23	* For more details, see drivers/net/arcnet.c
	24	*
	25	* **********************
	26	*/
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
	29	#include <linux/moduleparam.h>
	30	#include <linux/ioport.h>
1da177e4 LT	31	#include <linux/delay.h>
	32	#include <linux/netdevice.h>
	33	#include <linux/bootmem.h>
	34	#include <linux/init.h>
a6b7a407	35	#include <linux/interrupt.h>
1da177e4 LT	36	#include <asm/io.h>
	37	#include <linux/arcdevice.h>
	38
	39
	40	#define VERSION "arcnet: RIM I (entirely mem-mapped) support\n"
	41
	42
	43	/* Internal function declarations */
	44
	45	static int arcrimi_probe(struct net_device *dev);
	46	static int arcrimi_found(struct net_device *dev);
	47	static void arcrimi_command(struct net_device *dev, int command);
	48	static int arcrimi_status(struct net_device *dev);
	49	static void arcrimi_setmask(struct net_device *dev, int mask);
	50	static int arcrimi_reset(struct net_device *dev, int really_reset);
	51	static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
	52	void *buf, int count);
	53	static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
	54	void *buf, int count);
	55
	56	/* Handy defines for ARCnet specific stuff */
	57
	58	/* Amount of I/O memory used by the card */
cb334648 JP	59	#define BUFFER_SIZE (512)
cb334648 JP	60	#define MIRROR_SIZE (BUFFER_SIZE * 4)
1da177e4 LT	61
1da177e4 LT	62	/* COM 9026 controller chip --> ARCnet register addresses */
cb334648 JP	63	#define _INTMASK (ioaddr + 0) /* writable */
	64	#define _STATUS (ioaddr + 0) /* readable */
	65	#define _COMMAND (ioaddr + 1) /* writable, returns random vals on read (?) */
	66	#define _RESET (ioaddr + 8) /* software reset (on read) */
	67	#define _MEMDATA (ioaddr + 12) /* Data port for IO-mapped memory */
	68	#define _ADDR_HI (ioaddr + 15) /* Control registers for said */
	69	#define _ADDR_LO (ioaddr + 14)
	70	#define _CONFIG (ioaddr + 2) /* Configuration register */
1da177e4 LT	71
	72	#undef ASTATUS
	73	#undef ACOMMAND
	74	#undef AINTMASK
	75
	76	#define ASTATUS() readb(_STATUS)
cb334648 JP	77	#define ACOMMAND(cmd) writeb((cmd), _COMMAND)
	78	#define AINTMASK(msk) writeb((msk), _INTMASK)
	79	#define SETCONF() writeb(lp->config, _CONFIG)
1da177e4 LT	80
	81
	82	/*
	83	* We cannot probe for a RIM I card; one reason is I don't know how to reset
	84	* them. In fact, we can't even get their node ID automatically. So, we
	85	* need to be passed a specific shmem address, IRQ, and node ID.
	86	*/
	87	static int __init arcrimi_probe(struct net_device *dev)
	88	{
	89	BUGLVL(D_NORMAL) printk(VERSION);
	90	BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");
	91
b95465c8	92	BUGLVL(D_NORMAL) printk("Given: node %02Xh, shmem %lXh, irq %d\n",
cb334648	93	dev->dev_addr[0], dev->mem_start, dev->irq);
1da177e4 LT	94
1da177e4 LT	95	if (dev->mem_start <= 0 \|\| dev->irq <= 0) {
b95465c8	96	BUGLVL(D_NORMAL) printk("No autoprobe for RIM I; you "
1da177e4 LT	97	"must specify the shmem and irq!\n");
	98	return -ENODEV;
	99	}
d0f6ecad	100	if (dev->dev_addr[0] == 0) {
b95465c8	101	BUGLVL(D_NORMAL) printk("You need to specify your card's station "
d0f6ecad AV	102	"ID!\n");
	103	return -ENODEV;
	104	}
1da177e4	105	/*
d0f6ecad	106	* Grab the memory region at mem_start for MIRROR_SIZE bytes.
1da177e4 LT	107	* Later in arcrimi_found() the real size will be determined
	108	* and this reserve will be released and the correct size
	109	* will be taken.
	110	*/
d0f6ecad	111	if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
b95465c8	112	BUGLVL(D_NORMAL) printk("Card memory already allocated\n");
1da177e4 LT	113	return -ENODEV;
1da177e4 LT	114	}
1da177e4 LT	115	return arcrimi_found(dev);
	116	}
	117
d0f6ecad AV	118	static int check_mirror(unsigned long addr, size_t size)
	119	{
	120	void __iomem *p;
	121	int res = -1;
	122
	123	if (!request_mem_region(addr, size, "arcnet (90xx)"))
	124	return -1;
	125
	126	p = ioremap(addr, size);
	127	if (p) {
	128	if (readb(p) == TESTvalue)
	129	res = 1;
	130	else
	131	res = 0;
	132	iounmap(p);
	133	}
	134
	135	release_mem_region(addr, size);
	136	return res;
	137	}
1da177e4 LT	138
	139	/*
	140	* Set up the struct net_device associated with this card. Called after
	141	* probing succeeds.
	142	*/
	143	static int __init arcrimi_found(struct net_device *dev)
	144	{
	145	struct arcnet_local *lp;
	146	unsigned long first_mirror, last_mirror, shmem;
d0f6ecad	147	void __iomem *p;
1da177e4 LT	148	int mirror_size;
	149	int err;
	150
d0f6ecad AV	151	p = ioremap(dev->mem_start, MIRROR_SIZE);
	152	if (!p) {
	153	release_mem_region(dev->mem_start, MIRROR_SIZE);
	154	BUGMSG(D_NORMAL, "Can't ioremap\n");
	155	return -ENODEV;
	156	}
	157
1da177e4	158	/* reserve the irq */
a0607fd3	159	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
d0f6ecad AV	160	iounmap(p);
d0f6ecad AV	161	release_mem_region(dev->mem_start, MIRROR_SIZE);
1da177e4 LT	162	BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
	163	return -ENODEV;
	164	}
	165
	166	shmem = dev->mem_start;
d0f6ecad AV	167	writeb(TESTvalue, p);
d0f6ecad AV	168	writeb(dev->dev_addr[0], p + 1); /* actually the node ID */
1da177e4 LT	169
	170	/* find the real shared memory start/end points, including mirrors */
	171
	172	/* guess the actual size of one "memory mirror" - the number of
	173	* bytes between copies of the shared memory. On most cards, it's
	174	* 2k (or there are no mirrors at all) but on some, it's 4k.
	175	*/
	176	mirror_size = MIRROR_SIZE;
8e95a202 JP	177	if (readb(p) == TESTvalue &&
	178	check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
	179	check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
d0f6ecad	180	mirror_size = 2 * MIRROR_SIZE;
1da177e4	181
d0f6ecad AV	182	first_mirror = shmem - mirror_size;
d0f6ecad AV	183	while (check_mirror(first_mirror, mirror_size) == 1)
1da177e4 LT	184	first_mirror -= mirror_size;
	185	first_mirror += mirror_size;
	186
d0f6ecad AV	187	last_mirror = shmem + mirror_size;
d0f6ecad AV	188	while (check_mirror(last_mirror, mirror_size) == 1)
1da177e4 LT	189	last_mirror += mirror_size;
	190	last_mirror -= mirror_size;
	191
	192	dev->mem_start = first_mirror;
	193	dev->mem_end = last_mirror + MIRROR_SIZE - 1;
	194
	195	/* initialize the rest of the device structure. */
	196
454d7c9b	197	lp = netdev_priv(dev);
1da177e4 LT	198	lp->card_name = "RIM I";
	199	lp->hw.command = arcrimi_command;
	200	lp->hw.status = arcrimi_status;
	201	lp->hw.intmask = arcrimi_setmask;
	202	lp->hw.reset = arcrimi_reset;
	203	lp->hw.owner = THIS_MODULE;
	204	lp->hw.copy_to_card = arcrimi_copy_to_card;
	205	lp->hw.copy_from_card = arcrimi_copy_from_card;
	206
	207	/*
	208	* re-reserve the memory region - arcrimi_probe() alloced this reqion
	209	* but didn't know the real size. Free that region and then re-get
	210	* with the correct size. There is a VERY slim chance this could
	211	* fail.
	212	*/
d0f6ecad AV	213	iounmap(p);
d0f6ecad AV	214	release_mem_region(shmem, MIRROR_SIZE);
1da177e4 LT	215	if (!request_mem_region(dev->mem_start,
	216	dev->mem_end - dev->mem_start + 1,
	217	"arcnet (90xx)")) {
	218	BUGMSG(D_NORMAL, "Card memory already allocated\n");
	219	goto err_free_irq;
	220	}
	221
	222	lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	223	if (!lp->mem_start) {
	224	BUGMSG(D_NORMAL, "Can't remap device memory!\n");
	225	goto err_release_mem;
	226	}
	227
	228	/* get and check the station ID from offset 1 in shmem */
	229	dev->dev_addr[0] = readb(lp->mem_start + 1);
	230
	231	BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
	232	"ShMem %lXh (%ld*%d bytes).\n",
	233	dev->dev_addr[0],
	234	dev->irq, dev->mem_start,
	235	(dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
	236
	237	err = register_netdev(dev);
	238	if (err)
	239	goto err_unmap;
	240
	241	return 0;
	242
	243	err_unmap:
	244	iounmap(lp->mem_start);
	245	err_release_mem:
	246	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	247	err_free_irq:
	248	free_irq(dev->irq, dev);
	249	return -EIO;
	250	}
	251
	252
	253	/*
	254	* Do a hardware reset on the card, and set up necessary registers.
	255	*
	256	* This should be called as little as possible, because it disrupts the
	257	* token on the network (causes a RECON) and requires a significant delay.
	258	*
	259	* However, it does make sure the card is in a defined state.
	260	*/
	261	static int arcrimi_reset(struct net_device *dev, int really_reset)
	262	{
454d7c9b	263	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	264	void __iomem *ioaddr = lp->mem_start + 0x800;
	265
	266	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());
	267
	268	if (really_reset) {
	269	writeb(TESTvalue, ioaddr - 0x800); /* fake reset */
	270	return 0;
	271	}
	272	ACOMMAND(CFLAGScmd \| RESETclear); /* clear flags & end reset */
	273	ACOMMAND(CFLAGScmd \| CONFIGclear);
	274
	275	/* enable extended (512-byte) packets */
	276	ACOMMAND(CONFIGcmd \| EXTconf);
	277
	278	/* done! return success. */
	279	return 0;
	280	}
	281
	282	static void arcrimi_setmask(struct net_device *dev, int mask)
	283	{
454d7c9b	284	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	285	void __iomem *ioaddr = lp->mem_start + 0x800;
	286
	287	AINTMASK(mask);
	288	}
	289
	290	static int arcrimi_status(struct net_device *dev)
	291	{
454d7c9b	292	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	293	void __iomem *ioaddr = lp->mem_start + 0x800;
	294
	295	return ASTATUS();
	296	}
	297
	298	static void arcrimi_command(struct net_device *dev, int cmd)
	299	{
454d7c9b	300	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	301	void __iomem *ioaddr = lp->mem_start + 0x800;
	302
	303	ACOMMAND(cmd);
	304	}
	305
	306	static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
	307	void *buf, int count)
	308	{
454d7c9b	309	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	310	void __iomem memaddr = lp->mem_start + 0x800 + bufnum 512 + offset;
	311	TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
	312	}
	313
	314
	315	static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
	316	void *buf, int count)
	317	{
454d7c9b	318	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	319	void __iomem memaddr = lp->mem_start + 0x800 + bufnum 512 + offset;
	320	TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
	321	}
	322
	323	static int node;
	324	static int io; /* use the insmod io= irq= node= options */
	325	static int irq;
	326	static char device[9]; /* use eg. device=arc1 to change name */
	327
	328	module_param(node, int, 0);
	329	module_param(io, int, 0);
	330	module_param(irq, int, 0);
	331	module_param_string(device, device, sizeof(device), 0);
	332	MODULE_LICENSE("GPL");
	333
	334	static struct net_device *my_dev;
	335
	336	static int __init arc_rimi_init(void)
	337	{
	338	struct net_device *dev;
	339
	340	dev = alloc_arcdev(device);
	341	if (!dev)
	342	return -ENOMEM;
	343
	344	if (node && node != 0xff)
	345	dev->dev_addr[0] = node;
	346
	347	dev->mem_start = io;
	348	dev->irq = irq;
	349	if (dev->irq == 2)
	350	dev->irq = 9;
	351
	352	if (arcrimi_probe(dev)) {
	353	free_netdev(dev);
	354	return -EIO;
	355	}
	356
	357	my_dev = dev;
	358	return 0;
	359	}
	360
	361	static void __exit arc_rimi_exit(void)
	362	{
	363	struct net_device *dev = my_dev;
454d7c9b	364	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	365
	366	unregister_netdev(dev);
	367	iounmap(lp->mem_start);
	368	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	369	free_irq(dev->irq, dev);
	370	free_netdev(dev);
	371	}
	372
	373	#ifndef MODULE
	374	static int __init arcrimi_setup(char *s)
	375	{
	376	int ints[8];
	377	s = get_options(s, 8, ints);
	378	if (!ints[0])
	379	return 1;
	380	switch (ints[0]) {
	381	default: /* ERROR */
	382	printk("arcrimi: Too many arguments.\n");
	383	case 3: /* Node ID */
	384	node = ints[3];
	385	case 2: /* IRQ */
	386	irq = ints[2];
	387	case 1: /* IO address */
	388	io = ints[1];
	389	}
	390	if (*s)
	391	snprintf(device, sizeof(device), "%s", s);
	392	return 1;
	393	}
	394	__setup("arcrimi=", arcrimi_setup);
	395	#endif /* MODULE */
	396
	397	module_init(arc_rimi_init)
	398	module_exit(arc_rimi_exit)