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

#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 "arcdevice.h"

/* 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 COM9026_REG_W_INTMASK	0	/* writable */
#define COM9026_REG_R_STATUS	0	/* readable */
#define COM9026_REG_W_COMMAND	1	/* writable, returns random vals on read (?) */
#define COM9026_REG_RW_CONFIG	2	/* Configuration register */
#define COM9026_REG_R_RESET	8	/* software reset (on read) */
#define COM9026_REG_RW_MEMDATA	12	/* Data port for IO-mapped memory */
#define COM9026_REG_W_ADDR_LO	14	/* Control registers for said */
#define COM9026_REG_W_ADDR_HI	15

#define COM9026_REG_R_STATION	1	/* Station ID */

/* 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)
{
	if (BUGLVL(D_NORMAL)) {
		pr_info("%s\n", "RIM I (entirely mem-mapped) support");
		pr_info("E-mail me if you actually test the RIM I driver, please!\n");
		pr_info("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) {
		if (BUGLVL(D_NORMAL))
			pr_err("No autoprobe for RIM I; you must specify the shmem and irq!\n");
		return -ENODEV;
	}
	if (dev->dev_addr[0] == 0) {
		if (BUGLVL(D_NORMAL))
			pr_err("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)")) {
		if (BUGLVL(D_NORMAL))
			pr_notice("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 (arcnet_readb(p, COM9026_REG_R_STATUS) == 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);
		arc_printk(D_NORMAL, dev, "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);
		arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}

	shmem = dev->mem_start;
	arcnet_writeb(TESTvalue, p, COM9026_REG_W_INTMASK);
	arcnet_writeb(TESTvalue, p, COM9026_REG_W_COMMAND);
					/* actually the station/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 (arcnet_readb(p, COM9026_REG_R_STATUS) == 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)")) {
		arc_printk(D_NORMAL, dev, "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) {
		arc_printk(D_NORMAL, dev, "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] = arcnet_readb(lp->mem_start, COM9026_REG_R_STATION);

	arc_printk(D_NORMAL, dev, "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;

	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
		   dev->name, arcnet_readb(ioaddr, COM9026_REG_R_STATUS));

	if (really_reset) {
		arcnet_writeb(TESTvalue, ioaddr, -0x800);	/* fake reset */
		return 0;
	}
	/* clear flags & end reset */
	arcnet_writeb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
	arcnet_writeb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);

	/* enable extended (512-byte) packets */
	arcnet_writeb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);

	/* 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;

	arcnet_writeb(mask, ioaddr, COM9026_REG_W_INTMASK);
}

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

	return arcnet_readb(ioaddr, COM9026_REG_R_STATUS);
}

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

	arcnet_writeb(cmd, ioaddr, COM9026_REG_W_COMMAND);
}

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(dev, "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(dev, "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 */
		pr_err("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	*/
05a24b23 JP	27
	28	#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
	29
1da177e4 LT	30	#include <linux/kernel.h>
	31	#include <linux/module.h>
	32	#include <linux/moduleparam.h>
	33	#include <linux/ioport.h>
1da177e4 LT	34	#include <linux/delay.h>
	35	#include <linux/netdevice.h>
	36	#include <linux/bootmem.h>
	37	#include <linux/init.h>
a6b7a407	38	#include <linux/interrupt.h>
5e7ef913	39	#include <linux/io.h>
26c6d281 JP	40
26c6d281 JP	41	#include "arcdevice.h"
1da177e4	42
1da177e4 LT	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);
d6d7d3ed JP	53	static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	54	int offset, void *buf, int count);
1da177e4 LT	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 */
4e2f9f1b JP	63	#define COM9026_REG_W_INTMASK 0 /* writable */
	64	#define COM9026_REG_R_STATUS 0 /* readable */
	65	#define COM9026_REG_W_COMMAND 1 /* writable, returns random vals on read (?) */
	66	#define COM9026_REG_RW_CONFIG 2 /* Configuration register */
	67	#define COM9026_REG_R_RESET 8 /* software reset (on read) */
	68	#define COM9026_REG_RW_MEMDATA 12 /* Data port for IO-mapped memory */
	69	#define COM9026_REG_W_ADDR_LO 14 /* Control registers for said */
	70	#define COM9026_REG_W_ADDR_HI 15
	71
	72	#define COM9026_REG_R_STATION 1 /* Station ID */
1da177e4	73
f2f0a16b	74	/* We cannot probe for a RIM I card; one reason is I don't know how to reset
1da177e4 LT	75	* them. In fact, we can't even get their node ID automatically. So, we
	76	* need to be passed a specific shmem address, IRQ, and node ID.
	77	*/
	78	static int __init arcrimi_probe(struct net_device *dev)
	79	{
72aeea48	80	if (BUGLVL(D_NORMAL)) {
05a24b23 JP	81	pr_info("%s\n", "RIM I (entirely mem-mapped) support");
	82	pr_info("E-mail me if you actually test the RIM I driver, please!\n");
	83	pr_info("Given: node %02Xh, shmem %lXh, irq %d\n",
	84	dev->dev_addr[0], dev->mem_start, dev->irq);
72aeea48	85	}
1da177e4 LT	86
1da177e4 LT	87	if (dev->mem_start <= 0 \|\| dev->irq <= 0) {
72aeea48	88	if (BUGLVL(D_NORMAL))
05a24b23	89	pr_err("No autoprobe for RIM I; you must specify the shmem and irq!\n");
1da177e4 LT	90	return -ENODEV;
1da177e4 LT	91	}
d0f6ecad	92	if (dev->dev_addr[0] == 0) {
72aeea48	93	if (BUGLVL(D_NORMAL))
05a24b23	94	pr_err("You need to specify your card's station ID!\n");
d0f6ecad AV	95	return -ENODEV;
d0f6ecad AV	96	}
f2f0a16b	97	/* Grab the memory region at mem_start for MIRROR_SIZE bytes.
1da177e4 LT	98	* Later in arcrimi_found() the real size will be determined
	99	* and this reserve will be released and the correct size
	100	* will be taken.
	101	*/
d0f6ecad	102	if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
72aeea48	103	if (BUGLVL(D_NORMAL))
05a24b23	104	pr_notice("Card memory already allocated\n");
1da177e4 LT	105	return -ENODEV;
1da177e4 LT	106	}
1da177e4 LT	107	return arcrimi_found(dev);
	108	}
	109
d0f6ecad AV	110	static int check_mirror(unsigned long addr, size_t size)
	111	{
	112	void __iomem *p;
	113	int res = -1;
	114
	115	if (!request_mem_region(addr, size, "arcnet (90xx)"))
	116	return -1;
	117
	118	p = ioremap(addr, size);
	119	if (p) {
4e2f9f1b	120	if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue)
d0f6ecad AV	121	res = 1;
	122	else
	123	res = 0;
	124	iounmap(p);
	125	}
	126
	127	release_mem_region(addr, size);
	128	return res;
	129	}
1da177e4	130
f2f0a16b JP	131	/* Set up the struct net_device associated with this card.
f2f0a16b JP	132	* Called after probing succeeds.
1da177e4 LT	133	*/
	134	static int __init arcrimi_found(struct net_device *dev)
	135	{
	136	struct arcnet_local *lp;
	137	unsigned long first_mirror, last_mirror, shmem;
d0f6ecad	138	void __iomem *p;
1da177e4 LT	139	int mirror_size;
	140	int err;
	141
d0f6ecad AV	142	p = ioremap(dev->mem_start, MIRROR_SIZE);
	143	if (!p) {
	144	release_mem_region(dev->mem_start, MIRROR_SIZE);
a34c0932	145	arc_printk(D_NORMAL, dev, "Can't ioremap\n");
d0f6ecad AV	146	return -ENODEV;
	147	}
	148
1da177e4	149	/* reserve the irq */
a0607fd3	150	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
d0f6ecad AV	151	iounmap(p);
d0f6ecad AV	152	release_mem_region(dev->mem_start, MIRROR_SIZE);
a34c0932	153	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	154	return -ENODEV;
	155	}
	156
	157	shmem = dev->mem_start;
4e2f9f1b JP	158	arcnet_writeb(TESTvalue, p, COM9026_REG_W_INTMASK);
	159	arcnet_writeb(TESTvalue, p, COM9026_REG_W_COMMAND);
	160	/* actually the station/node ID */
1da177e4 LT	161
	162	/* find the real shared memory start/end points, including mirrors */
	163
	164	/* guess the actual size of one "memory mirror" - the number of
	165	* bytes between copies of the shared memory. On most cards, it's
	166	* 2k (or there are no mirrors at all) but on some, it's 4k.
	167	*/
	168	mirror_size = MIRROR_SIZE;
4e2f9f1b	169	if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue &&
8e95a202 JP	170	check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
8e95a202 JP	171	check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
d0f6ecad	172	mirror_size = 2 * MIRROR_SIZE;
1da177e4	173
d0f6ecad AV	174	first_mirror = shmem - mirror_size;
d0f6ecad AV	175	while (check_mirror(first_mirror, mirror_size) == 1)
1da177e4 LT	176	first_mirror -= mirror_size;
	177	first_mirror += mirror_size;
	178
d0f6ecad AV	179	last_mirror = shmem + mirror_size;
d0f6ecad AV	180	while (check_mirror(last_mirror, mirror_size) == 1)
1da177e4 LT	181	last_mirror += mirror_size;
	182	last_mirror -= mirror_size;
	183
	184	dev->mem_start = first_mirror;
	185	dev->mem_end = last_mirror + MIRROR_SIZE - 1;
	186
	187	/* initialize the rest of the device structure. */
	188
454d7c9b	189	lp = netdev_priv(dev);
1da177e4 LT	190	lp->card_name = "RIM I";
	191	lp->hw.command = arcrimi_command;
	192	lp->hw.status = arcrimi_status;
	193	lp->hw.intmask = arcrimi_setmask;
	194	lp->hw.reset = arcrimi_reset;
	195	lp->hw.owner = THIS_MODULE;
	196	lp->hw.copy_to_card = arcrimi_copy_to_card;
	197	lp->hw.copy_from_card = arcrimi_copy_from_card;
	198
f2f0a16b	199	/* re-reserve the memory region - arcrimi_probe() alloced this reqion
1da177e4 LT	200	* but didn't know the real size. Free that region and then re-get
	201	* with the correct size. There is a VERY slim chance this could
	202	* fail.
	203	*/
d0f6ecad AV	204	iounmap(p);
d0f6ecad AV	205	release_mem_region(shmem, MIRROR_SIZE);
1da177e4 LT	206	if (!request_mem_region(dev->mem_start,
	207	dev->mem_end - dev->mem_start + 1,
	208	"arcnet (90xx)")) {
a34c0932	209	arc_printk(D_NORMAL, dev, "Card memory already allocated\n");
1da177e4 LT	210	goto err_free_irq;
	211	}
	212
d6d7d3ed JP	213	lp->mem_start = ioremap(dev->mem_start,
d6d7d3ed JP	214	dev->mem_end - dev->mem_start + 1);
1da177e4	215	if (!lp->mem_start) {
a34c0932	216	arc_printk(D_NORMAL, dev, "Can't remap device memory!\n");
1da177e4 LT	217	goto err_release_mem;
	218	}
	219
	220	/* get and check the station ID from offset 1 in shmem */
4e2f9f1b	221	dev->dev_addr[0] = arcnet_readb(lp->mem_start, COM9026_REG_R_STATION);
1da177e4	222
a34c0932 JP	223	arc_printk(D_NORMAL, dev, "ARCnet RIM I: station %02Xh found at IRQ %d, ShMem %lXh (%ld*%d bytes)\n",
	224	dev->dev_addr[0],
	225	dev->irq, dev->mem_start,
	226	(dev->mem_end - dev->mem_start + 1) / mirror_size,
	227	mirror_size);
1da177e4 LT	228
	229	err = register_netdev(dev);
	230	if (err)
	231	goto err_unmap;
	232
	233	return 0;
	234
	235	err_unmap:
	236	iounmap(lp->mem_start);
	237	err_release_mem:
	238	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	239	err_free_irq:
	240	free_irq(dev->irq, dev);
	241	return -EIO;
	242	}
	243
f2f0a16b	244	/* Do a hardware reset on the card, and set up necessary registers.
1da177e4 LT	245	*
	246	* This should be called as little as possible, because it disrupts the
	247	* token on the network (causes a RECON) and requires a significant delay.
	248	*
	249	* However, it does make sure the card is in a defined state.
	250	*/
	251	static int arcrimi_reset(struct net_device *dev, int really_reset)
	252	{
454d7c9b	253	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	254	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	255
a34c0932	256	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
4e2f9f1b	257	dev->name, arcnet_readb(ioaddr, COM9026_REG_R_STATUS));
1da177e4 LT	258
1da177e4 LT	259	if (really_reset) {
4e2f9f1b	260	arcnet_writeb(TESTvalue, ioaddr, -0x800); /* fake reset */
1da177e4 LT	261	return 0;
1da177e4 LT	262	}
4e2f9f1b JP	263	/* clear flags & end reset */
	264	arcnet_writeb(CFLAGScmd \| RESETclear, ioaddr, COM9026_REG_W_COMMAND);
	265	arcnet_writeb(CFLAGScmd \| CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	266
1da177e4 LT	267	/* enable extended (512-byte) packets */
4e2f9f1b	268	arcnet_writeb(CONFIGcmd \| EXTconf, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	269
	270	/* done! return success. */
	271	return 0;
	272	}
	273
	274	static void arcrimi_setmask(struct net_device *dev, int mask)
	275	{
454d7c9b	276	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	277	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	278
4e2f9f1b	279	arcnet_writeb(mask, ioaddr, COM9026_REG_W_INTMASK);
1da177e4 LT	280	}
	281
	282	static int arcrimi_status(struct net_device *dev)
	283	{
454d7c9b	284	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	285	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	286
4e2f9f1b	287	return arcnet_readb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	288	}
	289
	290	static void arcrimi_command(struct net_device *dev, int cmd)
	291	{
454d7c9b	292	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	293	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	294
4e2f9f1b	295	arcnet_writeb(cmd, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	296	}
	297
	298	static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
	299	void *buf, int count)
	300	{
454d7c9b	301	struct arcnet_local *lp = netdev_priv(dev);
1da177e4	302	void __iomem memaddr = lp->mem_start + 0x800 + bufnum 512 + offset;
01a1d5ac	303
a34c0932	304	TIME(dev, "memcpy_toio", count, memcpy_toio(memaddr, buf, count));
1da177e4 LT	305	}
1da177e4 LT	306
d6d7d3ed JP	307	static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	308	int offset, void *buf, int count)
1da177e4	309	{
454d7c9b	310	struct arcnet_local *lp = netdev_priv(dev);
1da177e4	311	void __iomem memaddr = lp->mem_start + 0x800 + bufnum 512 + offset;
01a1d5ac	312
a34c0932	313	TIME(dev, "memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
1da177e4 LT	314	}
	315
	316	static int node;
	317	static int io; /* use the insmod io= irq= node= options */
	318	static int irq;
	319	static char device[9]; /* use eg. device=arc1 to change name */
	320
	321	module_param(node, int, 0);
	322	module_param(io, int, 0);
	323	module_param(irq, int, 0);
	324	module_param_string(device, device, sizeof(device), 0);
	325	MODULE_LICENSE("GPL");
	326
	327	static struct net_device *my_dev;
	328
	329	static int __init arc_rimi_init(void)
	330	{
	331	struct net_device *dev;
	332
	333	dev = alloc_arcdev(device);
	334	if (!dev)
	335	return -ENOMEM;
	336
	337	if (node && node != 0xff)
	338	dev->dev_addr[0] = node;
	339
	340	dev->mem_start = io;
	341	dev->irq = irq;
	342	if (dev->irq == 2)
	343	dev->irq = 9;
	344
	345	if (arcrimi_probe(dev)) {
	346	free_netdev(dev);
	347	return -EIO;
	348	}
	349
	350	my_dev = dev;
	351	return 0;
	352	}
	353
	354	static void __exit arc_rimi_exit(void)
	355	{
	356	struct net_device *dev = my_dev;
454d7c9b	357	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	358
	359	unregister_netdev(dev);
	360	iounmap(lp->mem_start);
	361	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	362	free_irq(dev->irq, dev);
	363	free_netdev(dev);
	364	}
	365
	366	#ifndef MODULE
	367	static int __init arcrimi_setup(char *s)
	368	{
	369	int ints[8];
01a1d5ac	370
1da177e4 LT	371	s = get_options(s, 8, ints);
	372	if (!ints[0])
	373	return 1;
	374	switch (ints[0]) {
	375	default: /* ERROR */
05a24b23	376	pr_err("Too many arguments\n");
1da177e4 LT	377	case 3: /* Node ID */
	378	node = ints[3];
	379	case 2: /* IRQ */
	380	irq = ints[2];
	381	case 1: /* IO address */
	382	io = ints[1];
	383	}
	384	if (*s)
	385	snprintf(device, sizeof(device), "%s", s);
	386	return 1;
	387	}
	388	__setup("arcrimi=", arcrimi_setup);
	389	#endif /* MODULE */
	390
	391	module_init(arc_rimi_init)
	392	module_exit(arc_rimi_exit)