[linux-block.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/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 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

/****************************************************************************
 *                                                                          *
 * 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;

	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);

	return arcnet_inb(ioaddr, COM9026_REG_RW_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;

	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);

	arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
}

#endif

static void get_whole_buffer(struct net_device *dev, unsigned offset,
			     unsigned length, char *dest)
{
	int ioaddr = dev->base_addr;

	arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);

	while (length--)
#ifdef ONE_AT_A_TIME_RX
		*(dest++) = get_buffer_byte(dev, offset++);
#else
		*(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
#endif
}

static void put_whole_buffer(struct net_device *dev, unsigned offset,
			     unsigned length, char *dest)
{
	int ioaddr = dev->base_addr;

	arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
	arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);

	while (length--)
#ifdef ONE_AT_A_TIME_TX
		put_buffer_byte(dev, offset++, *(dest++));
#else
		arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_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 (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
		arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
			   ioaddr);
		goto err_out;
	}
	arcnet_inb(ioaddr, COM9026_REG_R_RESET);
	mdelay(RESETtime);

	status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);

	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);

	arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
		    ioaddr, COM9026_REG_W_COMMAND);

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

	status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);

	if (status & RESETflag) {
		arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
			   status);
		goto err_out;
	}
	arcnet_outb((0x16 | IOMAPflag) & ~ENABLE16flag,
		    ioaddr, COM9026_REG_RW_CONFIG);

	/* Read first loc'n of memory */

	arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
	arcnet_outb(0, ioaddr,  COM9026_REG_W_ADDR_LO);

	status = arcnet_inb(ioaddr, COM9026_REG_RW_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();
		arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
		udelay(1);
		arcnet_outb(0, ioaddr, COM9026_REG_W_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;
	arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);

	/* 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) {
		arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
			    ioaddr, COM9026_REG_RW_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, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));

	if (really_reset) {
		/* reset the card */
		arcnet_inb(ioaddr, COM9026_REG_R_RESET);
		mdelay(RESETtime);
	}
	/* Set the thing to IO-mapped, 8-bit  mode */
	lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
	arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);

	arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
					/* clear flags & end reset */
	arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);

	/* 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 */
	arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
	/* done!  return success. */
	return 0;
}

static void com90io_command(struct net_device *dev, int cmd)
{
	short ioaddr = dev->base_addr;

	arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
}

static int com90io_status(struct net_device *dev)
{
	short ioaddr = dev->base_addr;

	return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
}

static void com90io_setmask(struct net_device *dev, int mask)
{
	short ioaddr = dev->base_addr;

	arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
}

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_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param_string(device, device, sizeof(device), 0);
MODULE_LICENSE("GPL");

#ifndef MODULE
static int __init com90io_setup(char *s)
{
	int ints[4];

	s = get_options(s, 4, ints);
	if (!ints[0])
		return 0;
	switch (ints[0]) {
	default:		/* ERROR */
		pr_err("Too many arguments\n");
	case 2:		/* IRQ */
		irq = ints[2];
	case 1:		/* IO address */
		io = ints[1];
	}
	if (*s)
		snprintf(device, sizeof(device), "%s", s);
	return 1;
}
__setup("com90io=", com90io_setup);
#endif

static struct net_device *my_dev;

static int __init com90io_init(void)
{
	struct net_device *dev;
	int err;

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

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

	err = com90io_probe(dev);

	if (err) {
		free_netdev(dev);
		return err;
	}

	my_dev = dev;
	return 0;
}

static void __exit com90io_exit(void)
{
	struct net_device *dev = my_dev;
	int ioaddr = dev->base_addr;

	unregister_netdev(dev);

	/* In case the old driver is loaded later,
	 * set the thing back to MMAP mode
	 */
	arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
		    ioaddr, COM9026_REG_RW_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>
1da177e4 LT	36	#include <linux/netdevice.h>
57c8a661	37	#include <linux/memblock.h>
1da177e4	38	#include <linux/init.h>
a6b7a407	39	#include <linux/interrupt.h>
5e7ef913	40	#include <linux/io.h>
26c6d281 JP	41
26c6d281 JP	42	#include "arcdevice.h"
8e0f295e	43	#include "com9026.h"
1da177e4	44
1da177e4 LT	45	/* Internal function declarations */
	46
	47	static int com90io_found(struct net_device *dev);
	48	static void com90io_command(struct net_device *dev, int command);
	49	static int com90io_status(struct net_device *dev);
	50	static void com90io_setmask(struct net_device *dev, int mask);
	51	static int com90io_reset(struct net_device *dev, int really_reset);
	52	static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
	53	void *buf, int count);
d6d7d3ed JP	54	static void com90io_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	55	int offset, void *buf, int count);
1da177e4	56
1da177e4 LT	57	/* Handy defines for ARCnet specific stuff */
	58
	59	/* The number of low I/O ports used by the card. */
	60	#define ARCNET_TOTAL_SIZE 16
	61
1da177e4 LT	62	/****************************************************************************
	63	* *
	64	* IO-mapped operation routines *
	65	* *
	66	****************************************************************************/
	67
	68	#undef ONE_AT_A_TIME_TX
	69	#undef ONE_AT_A_TIME_RX
	70
	71	static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
	72	{
	73	int ioaddr = dev->base_addr;
	74
f0b9c27c JP	75	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	76	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4	77
f0b9c27c	78	return arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	79	}
	80
	81	#ifdef ONE_AT_A_TIME_TX
d6d7d3ed JP	82	static void put_buffer_byte(struct net_device *dev, unsigned offset,
d6d7d3ed JP	83	u_char datum)
1da177e4 LT	84	{
	85	int ioaddr = dev->base_addr;
	86
f0b9c27c JP	87	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	88	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4	89
f0b9c27c	90	arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	91	}
	92
	93	#endif
	94
d6d7d3ed JP	95	static void get_whole_buffer(struct net_device *dev, unsigned offset,
d6d7d3ed JP	96	unsigned length, char *dest)
1da177e4 LT	97	{
	98	int ioaddr = dev->base_addr;
	99
f0b9c27c JP	100	arcnet_outb((offset >> 8) \| AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	101	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4 LT	102
	103	while (length--)
	104	#ifdef ONE_AT_A_TIME_RX
	105	*(dest++) = get_buffer_byte(dev, offset++);
	106	#else
f0b9c27c	107	*(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	108	#endif
	109	}
	110
d6d7d3ed JP	111	static void put_whole_buffer(struct net_device *dev, unsigned offset,
d6d7d3ed JP	112	unsigned length, char *dest)
1da177e4 LT	113	{
	114	int ioaddr = dev->base_addr;
	115
f0b9c27c JP	116	arcnet_outb((offset >> 8) \| AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	117	arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);
1da177e4 LT	118
	119	while (length--)
	120	#ifdef ONE_AT_A_TIME_TX
	121	put_buffer_byte(dev, offset++, *(dest++));
	122	#else
f0b9c27c	123	arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	124	#endif
	125	}
	126
f2f0a16b	127	/* We cannot probe for an IO mapped card either, although we can check that
1da177e4 LT	128	* it's where we were told it was, and even autoirq
	129	*/
	130	static int __init com90io_probe(struct net_device *dev)
	131	{
	132	int ioaddr = dev->base_addr, status;
	133	unsigned long airqmask;
	134
72aeea48	135	if (BUGLVL(D_NORMAL)) {
05a24b23 JP	136	pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
05a24b23 JP	137	pr_info("E-mail me if you actually test this driver, please!\n");
72aeea48	138	}
1da177e4 LT	139
1da177e4 LT	140	if (!ioaddr) {
a34c0932	141	arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
1da177e4 LT	142	return -ENODEV;
	143	}
	144	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
a34c0932 JP	145	arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
a34c0932 JP	146	ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
1da177e4 LT	147	return -ENXIO;
1da177e4 LT	148	}
f0b9c27c	149	if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
a34c0932 JP	150	arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
a34c0932 JP	151	ioaddr);
1da177e4 LT	152	goto err_out;
1da177e4 LT	153	}
f0b9c27c	154	arcnet_inb(ioaddr, COM9026_REG_R_RESET);
1da177e4 LT	155	mdelay(RESETtime);
1da177e4 LT	156
f0b9c27c	157	status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	158
1da177e4 LT	159	if ((status & 0x9D) != (NORXflag \| RECONflag \| TXFREEflag \| RESETflag)) {
a34c0932 JP	160	arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
a34c0932 JP	161	status);
1da177e4 LT	162	goto err_out;
1da177e4 LT	163	}
a34c0932	164	arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
1da177e4	165
f0b9c27c JP	166	arcnet_outb(CFLAGScmd \| RESETclear \| CONFIGclear,
f0b9c27c JP	167	ioaddr, COM9026_REG_W_COMMAND);
1da177e4	168
a34c0932 JP	169	arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
a34c0932 JP	170	status);
1da177e4	171
f0b9c27c	172	status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	173
1da177e4 LT	174	if (status & RESETflag) {
a34c0932 JP	175	arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
a34c0932 JP	176	status);
1da177e4 LT	177	goto err_out;
1da177e4 LT	178	}
f0b9c27c JP	179	arcnet_outb((0x16 \| IOMAPflag) & ~ENABLE16flag,
f0b9c27c JP	180	ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	181
	182	/* Read first loc'n of memory */
	183
f0b9c27c JP	184	arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	185	arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4	186
f0b9c27c	187	status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
97464edd	188	if (status != 0xd1) {
a34c0932 JP	189	arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
a34c0932 JP	190	status);
1da177e4 LT	191	goto err_out;
	192	}
	193	if (!dev->irq) {
f2f0a16b	194	/* if we do this, we're sure to get an IRQ since the
1da177e4 LT	195	* card has just reset and the NORXflag is on until
	196	* we tell it to start receiving.
	197	*/
	198
	199	airqmask = probe_irq_on();
f0b9c27c	200	arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
1da177e4	201	udelay(1);
f0b9c27c	202	arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
1da177e4 LT	203	dev->irq = probe_irq_off(airqmask);
1da177e4 LT	204
0a6efc78	205	if ((int)dev->irq <= 0) {
a34c0932	206	arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
1da177e4 LT	207	goto err_out;
	208	}
	209	}
	210	release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
	211	return com90io_found(dev);
	212
	213	err_out:
	214	release_region(ioaddr, ARCNET_TOTAL_SIZE);
	215	return -ENODEV;
	216	}
	217
1da177e4 LT	218	/* Set up the struct net_device associated with this card. Called after
	219	* probing succeeds.
	220	*/
	221	static int __init com90io_found(struct net_device *dev)
	222	{
	223	struct arcnet_local *lp;
	224	int ioaddr = dev->base_addr;
	225	int err;
	226
	227	/* Reserve the irq */
d6d7d3ed JP	228	if (request_irq(dev->irq, arcnet_interrupt, 0,
d6d7d3ed JP	229	"arcnet (COM90xx-IO)", dev)) {
a34c0932	230	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	231	return -ENODEV;
1da177e4 LT	232	}
fb911ee8	233	/* Reserve the I/O region */
d6d7d3ed JP	234	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
d6d7d3ed JP	235	"arcnet (COM90xx-IO)")) {
1da177e4 LT	236	free_irq(dev->irq, dev);
	237	return -EBUSY;
	238	}
	239
454d7c9b	240	lp = netdev_priv(dev);
1da177e4 LT	241	lp->card_name = "COM90xx I/O";
	242	lp->hw.command = com90io_command;
	243	lp->hw.status = com90io_status;
	244	lp->hw.intmask = com90io_setmask;
	245	lp->hw.reset = com90io_reset;
	246	lp->hw.owner = THIS_MODULE;
	247	lp->hw.copy_to_card = com90io_copy_to_card;
	248	lp->hw.copy_from_card = com90io_copy_from_card;
	249
	250	lp->config = (0x16 \| IOMAPflag) & ~ENABLE16flag;
f0b9c27c	251	arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	252
	253	/* get and check the station ID from offset 1 in shmem */
	254
	255	dev->dev_addr[0] = get_buffer_byte(dev, 1);
	256
	257	err = register_netdev(dev);
	258	if (err) {
f0b9c27c JP	259	arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
f0b9c27c JP	260	ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	261	free_irq(dev->irq, dev);
	262	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	263	return err;
	264	}
	265
a34c0932 JP	266	arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
a34c0932 JP	267	dev->dev_addr[0], dev->base_addr, dev->irq);
1da177e4 LT	268
	269	return 0;
	270	}
	271
f2f0a16b	272	/* Do a hardware reset on the card, and set up necessary registers.
1da177e4 LT	273	*
	274	* This should be called as little as possible, because it disrupts the
	275	* token on the network (causes a RECON) and requires a significant delay.
	276	*
	277	* However, it does make sure the card is in a defined state.
	278	*/
	279	static int com90io_reset(struct net_device *dev, int really_reset)
	280	{
454d7c9b	281	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	282	short ioaddr = dev->base_addr;
1da177e4 LT	283
a34c0932	284	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
f0b9c27c	285	dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
1da177e4 LT	286
	287	if (really_reset) {
	288	/* reset the card */
f0b9c27c	289	arcnet_inb(ioaddr, COM9026_REG_R_RESET);
1da177e4 LT	290	mdelay(RESETtime);
	291	}
	292	/* Set the thing to IO-mapped, 8-bit mode */
	293	lp->config = (0x1C \| IOMAPflag) & ~ENABLE16flag;
f0b9c27c	294	arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
1da177e4	295
f0b9c27c JP	296	arcnet_outb(CFLAGScmd \| RESETclear, ioaddr, COM9026_REG_W_COMMAND);
	297	/* clear flags & end reset */
	298	arcnet_outb(CFLAGScmd \| CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	299
	300	/* verify that the ARCnet signature byte is present */
	301	if (get_buffer_byte(dev, 0) != TESTvalue) {
a34c0932	302	arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
1da177e4 LT	303	return 1;
	304	}
	305	/* enable extended (512-byte) packets */
f0b9c27c	306	arcnet_outb(CONFIGcmd \| EXTconf, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	307	/* done! return success. */
	308	return 0;
	309	}
	310
1da177e4 LT	311	static void com90io_command(struct net_device *dev, int cmd)
	312	{
	313	short ioaddr = dev->base_addr;
	314
f0b9c27c	315	arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	316	}
1da177e4 LT	317
1da177e4 LT	318	static int com90io_status(struct net_device *dev)
	319	{
	320	short ioaddr = dev->base_addr;
	321
f0b9c27c	322	return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	323	}
1da177e4 LT	324
1da177e4 LT	325	static void com90io_setmask(struct net_device *dev, int mask)
	326	{
	327	short ioaddr = dev->base_addr;
	328
f0b9c27c	329	arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
1da177e4 LT	330	}
1da177e4 LT	331
d6d7d3ed JP	332	static void com90io_copy_to_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	333	int offset, void *buf, int count)
1da177e4	334	{
a34c0932 JP	335	TIME(dev, "put_whole_buffer", count,
a34c0932 JP	336	put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	337	}
1da177e4 LT	338
d6d7d3ed JP	339	static void com90io_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	340	int offset, void *buf, int count)
1da177e4	341	{
a34c0932 JP	342	TIME(dev, "get_whole_buffer", count,
a34c0932 JP	343	get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	344	}
	345
	346	static int io; /* use the insmod io= irq= shmem= options */
	347	static int irq;
	348	static char device[9]; /* use eg. device=arc1 to change name */
	349
06a5128a DH	350	module_param_hw(io, int, ioport, 0);
06a5128a DH	351	module_param_hw(irq, int, irq, 0);
1da177e4 LT	352	module_param_string(device, device, sizeof(device), 0);
	353	MODULE_LICENSE("GPL");
	354
	355	#ifndef MODULE
	356	static int __init com90io_setup(char *s)
	357	{
	358	int ints[4];
01a1d5ac	359
1da177e4 LT	360	s = get_options(s, 4, ints);
	361	if (!ints[0])
	362	return 0;
	363	switch (ints[0]) {
	364	default: /* ERROR */
05a24b23	365	pr_err("Too many arguments\n");
1da177e4 LT	366	case 2: /* IRQ */
	367	irq = ints[2];
	368	case 1: /* IO address */
	369	io = ints[1];
	370	}
	371	if (*s)
	372	snprintf(device, sizeof(device), "%s", s);
	373	return 1;
	374	}
	375	__setup("com90io=", com90io_setup);
	376	#endif
	377
	378	static struct net_device *my_dev;
	379
	380	static int __init com90io_init(void)
	381	{
	382	struct net_device *dev;
	383	int err;
	384
	385	dev = alloc_arcdev(device);
	386	if (!dev)
	387	return -ENOMEM;
	388
1da177e4 LT	389	dev->base_addr = io;
	390	dev->irq = irq;
	391	if (dev->irq == 2)
	392	dev->irq = 9;
	393
	394	err = com90io_probe(dev);
	395
	396	if (err) {
	397	free_netdev(dev);
	398	return err;
	399	}
	400
	401	my_dev = dev;
	402	return 0;
	403	}
	404
	405	static void __exit com90io_exit(void)
	406	{
	407	struct net_device *dev = my_dev;
	408	int ioaddr = dev->base_addr;
	409
	410	unregister_netdev(dev);
	411
d6d7d3ed JP	412	/* In case the old driver is loaded later,
	413	* set the thing back to MMAP mode
	414	*/
f0b9c27c JP	415	arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
f0b9c27c JP	416	ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	417
	418	free_irq(dev->irq, dev);
	419	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	420	free_netdev(dev);
	421	}
	422
	423	module_init(com90io_init)
	424	module_exit(com90io_exit)