[mirror_ubuntu-jammy-kernel.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/memblock.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include "arcdevice.h"
#include "com9026.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)

/* 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");
		fallthrough;
	case 3:		/* Node ID */
		node = ints[3];
		fallthrough;
	case 2:		/* IRQ */
		irq = ints[2];
		fallthrough;
	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>
1da177e4 LT	35	#include <linux/netdevice.h>
57c8a661	36	#include <linux/memblock.h>
1da177e4	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"
8e0f295e	42	#include "com9026.h"
1da177e4	43
1da177e4 LT	44	/* Internal function declarations */
	45
	46	static int arcrimi_probe(struct net_device *dev);
	47	static int arcrimi_found(struct net_device *dev);
	48	static void arcrimi_command(struct net_device *dev, int command);
	49	static int arcrimi_status(struct net_device *dev);
	50	static void arcrimi_setmask(struct net_device *dev, int mask);
	51	static int arcrimi_reset(struct net_device *dev, int really_reset);
	52	static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
	53	void *buf, int count);
d6d7d3ed JP	54	static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	55	int offset, void *buf, int count);
1da177e4 LT	56
	57	/* Handy defines for ARCnet specific stuff */
	58
	59	/* Amount of I/O memory used by the card */
cb334648 JP	60	#define BUFFER_SIZE (512)
cb334648 JP	61	#define MIRROR_SIZE (BUFFER_SIZE * 4)
1da177e4	62
f2f0a16b	63	/* We cannot probe for a RIM I card; one reason is I don't know how to reset
1da177e4 LT	64	* them. In fact, we can't even get their node ID automatically. So, we
	65	* need to be passed a specific shmem address, IRQ, and node ID.
	66	*/
	67	static int __init arcrimi_probe(struct net_device *dev)
	68	{
72aeea48	69	if (BUGLVL(D_NORMAL)) {
05a24b23 JP	70	pr_info("%s\n", "RIM I (entirely mem-mapped) support");
	71	pr_info("E-mail me if you actually test the RIM I driver, please!\n");
	72	pr_info("Given: node %02Xh, shmem %lXh, irq %d\n",
	73	dev->dev_addr[0], dev->mem_start, dev->irq);
72aeea48	74	}
1da177e4 LT	75
1da177e4 LT	76	if (dev->mem_start <= 0 \|\| dev->irq <= 0) {
72aeea48	77	if (BUGLVL(D_NORMAL))
05a24b23	78	pr_err("No autoprobe for RIM I; you must specify the shmem and irq!\n");
1da177e4 LT	79	return -ENODEV;
1da177e4 LT	80	}
d0f6ecad	81	if (dev->dev_addr[0] == 0) {
72aeea48	82	if (BUGLVL(D_NORMAL))
05a24b23	83	pr_err("You need to specify your card's station ID!\n");
d0f6ecad AV	84	return -ENODEV;
d0f6ecad AV	85	}
f2f0a16b	86	/* Grab the memory region at mem_start for MIRROR_SIZE bytes.
1da177e4 LT	87	* Later in arcrimi_found() the real size will be determined
	88	* and this reserve will be released and the correct size
	89	* will be taken.
	90	*/
d0f6ecad	91	if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
72aeea48	92	if (BUGLVL(D_NORMAL))
05a24b23	93	pr_notice("Card memory already allocated\n");
1da177e4 LT	94	return -ENODEV;
1da177e4 LT	95	}
1da177e4 LT	96	return arcrimi_found(dev);
	97	}
	98
d0f6ecad AV	99	static int check_mirror(unsigned long addr, size_t size)
	100	{
	101	void __iomem *p;
	102	int res = -1;
	103
	104	if (!request_mem_region(addr, size, "arcnet (90xx)"))
	105	return -1;
	106
	107	p = ioremap(addr, size);
	108	if (p) {
4e2f9f1b	109	if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue)
d0f6ecad AV	110	res = 1;
	111	else
	112	res = 0;
	113	iounmap(p);
	114	}
	115
	116	release_mem_region(addr, size);
	117	return res;
	118	}
1da177e4	119
f2f0a16b JP	120	/* Set up the struct net_device associated with this card.
f2f0a16b JP	121	* Called after probing succeeds.
1da177e4 LT	122	*/
	123	static int __init arcrimi_found(struct net_device *dev)
	124	{
	125	struct arcnet_local *lp;
	126	unsigned long first_mirror, last_mirror, shmem;
d0f6ecad	127	void __iomem *p;
1da177e4 LT	128	int mirror_size;
	129	int err;
	130
d0f6ecad AV	131	p = ioremap(dev->mem_start, MIRROR_SIZE);
	132	if (!p) {
	133	release_mem_region(dev->mem_start, MIRROR_SIZE);
a34c0932	134	arc_printk(D_NORMAL, dev, "Can't ioremap\n");
d0f6ecad AV	135	return -ENODEV;
	136	}
	137
1da177e4	138	/* reserve the irq */
a0607fd3	139	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
d0f6ecad AV	140	iounmap(p);
d0f6ecad AV	141	release_mem_region(dev->mem_start, MIRROR_SIZE);
a34c0932	142	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	143	return -ENODEV;
	144	}
	145
	146	shmem = dev->mem_start;
4e2f9f1b JP	147	arcnet_writeb(TESTvalue, p, COM9026_REG_W_INTMASK);
	148	arcnet_writeb(TESTvalue, p, COM9026_REG_W_COMMAND);
	149	/* actually the station/node ID */
1da177e4 LT	150
	151	/* find the real shared memory start/end points, including mirrors */
	152
	153	/* guess the actual size of one "memory mirror" - the number of
	154	* bytes between copies of the shared memory. On most cards, it's
	155	* 2k (or there are no mirrors at all) but on some, it's 4k.
	156	*/
	157	mirror_size = MIRROR_SIZE;
4e2f9f1b	158	if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue &&
8e95a202 JP	159	check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
8e95a202 JP	160	check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
d0f6ecad	161	mirror_size = 2 * MIRROR_SIZE;
1da177e4	162
d0f6ecad AV	163	first_mirror = shmem - mirror_size;
d0f6ecad AV	164	while (check_mirror(first_mirror, mirror_size) == 1)
1da177e4 LT	165	first_mirror -= mirror_size;
	166	first_mirror += mirror_size;
	167
d0f6ecad AV	168	last_mirror = shmem + mirror_size;
d0f6ecad AV	169	while (check_mirror(last_mirror, mirror_size) == 1)
1da177e4 LT	170	last_mirror += mirror_size;
	171	last_mirror -= mirror_size;
	172
	173	dev->mem_start = first_mirror;
	174	dev->mem_end = last_mirror + MIRROR_SIZE - 1;
	175
	176	/* initialize the rest of the device structure. */
	177
454d7c9b	178	lp = netdev_priv(dev);
1da177e4 LT	179	lp->card_name = "RIM I";
	180	lp->hw.command = arcrimi_command;
	181	lp->hw.status = arcrimi_status;
	182	lp->hw.intmask = arcrimi_setmask;
	183	lp->hw.reset = arcrimi_reset;
	184	lp->hw.owner = THIS_MODULE;
	185	lp->hw.copy_to_card = arcrimi_copy_to_card;
	186	lp->hw.copy_from_card = arcrimi_copy_from_card;
	187
f2f0a16b	188	/* re-reserve the memory region - arcrimi_probe() alloced this reqion
1da177e4 LT	189	* but didn't know the real size. Free that region and then re-get
	190	* with the correct size. There is a VERY slim chance this could
	191	* fail.
	192	*/
d0f6ecad AV	193	iounmap(p);
d0f6ecad AV	194	release_mem_region(shmem, MIRROR_SIZE);
1da177e4 LT	195	if (!request_mem_region(dev->mem_start,
	196	dev->mem_end - dev->mem_start + 1,
	197	"arcnet (90xx)")) {
a34c0932	198	arc_printk(D_NORMAL, dev, "Card memory already allocated\n");
1da177e4 LT	199	goto err_free_irq;
	200	}
	201
d6d7d3ed JP	202	lp->mem_start = ioremap(dev->mem_start,
d6d7d3ed JP	203	dev->mem_end - dev->mem_start + 1);
1da177e4	204	if (!lp->mem_start) {
a34c0932	205	arc_printk(D_NORMAL, dev, "Can't remap device memory!\n");
1da177e4 LT	206	goto err_release_mem;
	207	}
	208
	209	/* get and check the station ID from offset 1 in shmem */
4e2f9f1b	210	dev->dev_addr[0] = arcnet_readb(lp->mem_start, COM9026_REG_R_STATION);
1da177e4	211
a34c0932 JP	212	arc_printk(D_NORMAL, dev, "ARCnet RIM I: station %02Xh found at IRQ %d, ShMem %lXh (%ld*%d bytes)\n",
	213	dev->dev_addr[0],
	214	dev->irq, dev->mem_start,
	215	(dev->mem_end - dev->mem_start + 1) / mirror_size,
	216	mirror_size);
1da177e4 LT	217
	218	err = register_netdev(dev);
	219	if (err)
	220	goto err_unmap;
	221
	222	return 0;
	223
	224	err_unmap:
	225	iounmap(lp->mem_start);
	226	err_release_mem:
	227	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	228	err_free_irq:
	229	free_irq(dev->irq, dev);
	230	return -EIO;
	231	}
	232
f2f0a16b	233	/* Do a hardware reset on the card, and set up necessary registers.
1da177e4 LT	234	*
	235	* This should be called as little as possible, because it disrupts the
	236	* token on the network (causes a RECON) and requires a significant delay.
	237	*
	238	* However, it does make sure the card is in a defined state.
	239	*/
	240	static int arcrimi_reset(struct net_device *dev, int really_reset)
	241	{
454d7c9b	242	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	243	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	244
a34c0932	245	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
4e2f9f1b	246	dev->name, arcnet_readb(ioaddr, COM9026_REG_R_STATUS));
1da177e4 LT	247
1da177e4 LT	248	if (really_reset) {
4e2f9f1b	249	arcnet_writeb(TESTvalue, ioaddr, -0x800); /* fake reset */
1da177e4 LT	250	return 0;
1da177e4 LT	251	}
4e2f9f1b JP	252	/* clear flags & end reset */
	253	arcnet_writeb(CFLAGScmd \| RESETclear, ioaddr, COM9026_REG_W_COMMAND);
	254	arcnet_writeb(CFLAGScmd \| CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	255
1da177e4 LT	256	/* enable extended (512-byte) packets */
4e2f9f1b	257	arcnet_writeb(CONFIGcmd \| EXTconf, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	258
	259	/* done! return success. */
	260	return 0;
	261	}
	262
	263	static void arcrimi_setmask(struct net_device *dev, int mask)
	264	{
454d7c9b	265	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	266	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	267
4e2f9f1b	268	arcnet_writeb(mask, ioaddr, COM9026_REG_W_INTMASK);
1da177e4 LT	269	}
	270
	271	static int arcrimi_status(struct net_device *dev)
	272	{
454d7c9b	273	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	274	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	275
4e2f9f1b	276	return arcnet_readb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	277	}
	278
	279	static void arcrimi_command(struct net_device *dev, int cmd)
	280	{
454d7c9b	281	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	282	void __iomem *ioaddr = lp->mem_start + 0x800;
1da177e4 LT	283
4e2f9f1b	284	arcnet_writeb(cmd, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	285	}
	286
	287	static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
	288	void *buf, int count)
	289	{
454d7c9b	290	struct arcnet_local *lp = netdev_priv(dev);
1da177e4	291	void __iomem memaddr = lp->mem_start + 0x800 + bufnum 512 + offset;
01a1d5ac	292
a34c0932	293	TIME(dev, "memcpy_toio", count, memcpy_toio(memaddr, buf, count));
1da177e4 LT	294	}
1da177e4 LT	295
d6d7d3ed JP	296	static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	297	int offset, void *buf, int count)
1da177e4	298	{
454d7c9b	299	struct arcnet_local *lp = netdev_priv(dev);
1da177e4	300	void __iomem memaddr = lp->mem_start + 0x800 + bufnum 512 + offset;
01a1d5ac	301
a34c0932	302	TIME(dev, "memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
1da177e4 LT	303	}
	304
	305	static int node;
	306	static int io; /* use the insmod io= irq= node= options */
	307	static int irq;
	308	static char device[9]; /* use eg. device=arc1 to change name */
	309
	310	module_param(node, int, 0);
	311	module_param(io, int, 0);
	312	module_param(irq, int, 0);
	313	module_param_string(device, device, sizeof(device), 0);
	314	MODULE_LICENSE("GPL");
	315
	316	static struct net_device *my_dev;
	317
	318	static int __init arc_rimi_init(void)
	319	{
	320	struct net_device *dev;
	321
	322	dev = alloc_arcdev(device);
	323	if (!dev)
	324	return -ENOMEM;
	325
	326	if (node && node != 0xff)
	327	dev->dev_addr[0] = node;
	328
	329	dev->mem_start = io;
	330	dev->irq = irq;
	331	if (dev->irq == 2)
	332	dev->irq = 9;
	333
	334	if (arcrimi_probe(dev)) {
	335	free_netdev(dev);
	336	return -EIO;
	337	}
	338
	339	my_dev = dev;
	340	return 0;
	341	}
	342
	343	static void __exit arc_rimi_exit(void)
	344	{
	345	struct net_device *dev = my_dev;
454d7c9b	346	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	347
	348	unregister_netdev(dev);
	349	iounmap(lp->mem_start);
	350	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	351	free_irq(dev->irq, dev);
	352	free_netdev(dev);
	353	}
	354
	355	#ifndef MODULE
	356	static int __init arcrimi_setup(char *s)
	357	{
	358	int ints[8];
01a1d5ac	359
1da177e4 LT	360	s = get_options(s, 8, ints);
	361	if (!ints[0])
	362	return 1;
	363	switch (ints[0]) {
	364	default: /* ERROR */
05a24b23	365	pr_err("Too many arguments\n");
df561f66	366	fallthrough;
1da177e4 LT	367	case 3: /* Node ID */
1da177e4 LT	368	node = ints[3];
df561f66	369	fallthrough;
1da177e4 LT	370	case 2: /* IRQ */
1da177e4 LT	371	irq = ints[2];
df561f66	372	fallthrough;
1da177e4 LT	373	case 1: /* IO address */
	374	io = ints[1];
	375	}
	376	if (*s)
	377	snprintf(device, sizeof(device), "%s", s);
	378	return 1;
	379	}
	380	__setup("arcrimi=", arcrimi_setup);
	381	#endif /* MODULE */
	382
	383	module_init(arc_rimi_init)
	384	module_exit(arc_rimi_exit)