[mirror_ubuntu-artful-kernel.git] / drivers / net / arcnet / com90io.c

/*
 * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
 *
 * Written 1997 by David Woodhouse.
 * Written 1994-1999 by Avery Pennarun.
 * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
 * Derived from skeleton.c by Donald Becker.
 *
 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
 *  for sponsoring the further development of this driver.
 *
 * **********************
 *
 * The original copyright of skeleton.c was as follows:
 *
 * skeleton.c Written 1993 by Donald Becker.
 * Copyright 1993 United States Government as represented by the
 * Director, National Security Agency.  This software may only be used
 * and distributed according to the terms of the GNU General Public License as
 * modified by SRC, incorporated herein by reference.
 *
 * **********************
 *
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */

#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include "arcdevice.h"

/* Internal function declarations */

static int com90io_found(struct net_device *dev);
static void com90io_command(struct net_device *dev, int command);
static int com90io_status(struct net_device *dev);
static void com90io_setmask(struct net_device *dev, int mask);
static int com90io_reset(struct net_device *dev, int really_reset);
static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count);
static void com90io_copy_from_card(struct net_device *dev, int bufnum,
				   int offset, void *buf, int count);

/* Handy defines for ARCnet specific stuff */

/* The number of low I/O ports used by the card. */
#define ARCNET_TOTAL_SIZE 16

/* COM 9026 controller chip --> ARCnet register addresses */
#define 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

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

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

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

static struct net_device *my_dev;

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

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

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

	err = com90io_probe(dev);

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

	my_dev = dev;
	return 0;
}

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

	unregister_netdev(dev);

	/* 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>
	36	#include <linux/netdevice.h>
	37	#include <linux/bootmem.h>
	38	#include <linux/init.h>
a6b7a407	39	#include <linux/interrupt.h>
5e7ef913	40	#include <linux/io.h>
26c6d281 JP	41
26c6d281 JP	42	#include "arcdevice.h"
1da177e4	43
1da177e4 LT	44	/* Internal function declarations */
	45
	46	static int com90io_found(struct net_device *dev);
	47	static void com90io_command(struct net_device *dev, int command);
	48	static int com90io_status(struct net_device *dev);
	49	static void com90io_setmask(struct net_device *dev, int mask);
	50	static int com90io_reset(struct net_device *dev, int really_reset);
	51	static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
	52	void *buf, int count);
d6d7d3ed JP	53	static void com90io_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	54	int offset, void *buf, int count);
1da177e4	55
1da177e4 LT	56	/* Handy defines for ARCnet specific stuff */
	57
	58	/* The number of low I/O ports used by the card. */
	59	#define ARCNET_TOTAL_SIZE 16
	60
	61	/* COM 9026 controller chip --> ARCnet register addresses */
f0b9c27c JP	62	#define COM9026_REG_W_INTMASK 0 /* writable */
	63	#define COM9026_REG_R_STATUS 0 /* readable */
	64	#define COM9026_REG_W_COMMAND 1 /* writable, returns random vals on read (?) */
	65	#define COM9026_REG_RW_CONFIG 2 /* Configuration register */
	66	#define COM9026_REG_R_RESET 8 /* software reset (on read) */
	67	#define COM9026_REG_RW_MEMDATA 12 /* Data port for IO-mapped memory */
	68	#define COM9026_REG_W_ADDR_LO 14 /* Control registers for said */
	69	#define COM9026_REG_W_ADDR_HI 15
1da177e4	70
1da177e4 LT	71	/****************************************************************************
	72	* *
	73	* IO-mapped operation routines *
	74	* *
	75	****************************************************************************/
	76
	77	#undef ONE_AT_A_TIME_TX
	78	#undef ONE_AT_A_TIME_RX
	79
	80	static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
	81	{
	82	int ioaddr = dev->base_addr;
	83
f0b9c27c JP	84	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	85	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4	86
f0b9c27c	87	return arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	88	}
	89
	90	#ifdef ONE_AT_A_TIME_TX
d6d7d3ed JP	91	static void put_buffer_byte(struct net_device *dev, unsigned offset,
d6d7d3ed JP	92	u_char datum)
1da177e4 LT	93	{
	94	int ioaddr = dev->base_addr;
	95
f0b9c27c JP	96	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	97	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4	98
f0b9c27c	99	arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	100	}
	101
	102	#endif
	103
d6d7d3ed JP	104	static void get_whole_buffer(struct net_device *dev, unsigned offset,
d6d7d3ed JP	105	unsigned length, char *dest)
1da177e4 LT	106	{
	107	int ioaddr = dev->base_addr;
	108
f0b9c27c JP	109	arcnet_outb((offset >> 8) \| AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	110	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4 LT	111
	112	while (length--)
	113	#ifdef ONE_AT_A_TIME_RX
	114	*(dest++) = get_buffer_byte(dev, offset++);
	115	#else
f0b9c27c	116	*(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	117	#endif
	118	}
	119
d6d7d3ed JP	120	static void put_whole_buffer(struct net_device *dev, unsigned offset,
d6d7d3ed JP	121	unsigned length, char *dest)
1da177e4 LT	122	{
	123	int ioaddr = dev->base_addr;
	124
f0b9c27c JP	125	arcnet_outb((offset >> 8) \| AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	126	arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);
1da177e4 LT	127
	128	while (length--)
	129	#ifdef ONE_AT_A_TIME_TX
	130	put_buffer_byte(dev, offset++, *(dest++));
	131	#else
f0b9c27c	132	arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_MEMDATA);
1da177e4 LT	133	#endif
	134	}
	135
f2f0a16b	136	/* We cannot probe for an IO mapped card either, although we can check that
1da177e4 LT	137	* it's where we were told it was, and even autoirq
	138	*/
	139	static int __init com90io_probe(struct net_device *dev)
	140	{
	141	int ioaddr = dev->base_addr, status;
	142	unsigned long airqmask;
	143
72aeea48	144	if (BUGLVL(D_NORMAL)) {
05a24b23 JP	145	pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
05a24b23 JP	146	pr_info("E-mail me if you actually test this driver, please!\n");
72aeea48	147	}
1da177e4 LT	148
1da177e4 LT	149	if (!ioaddr) {
a34c0932	150	arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
1da177e4 LT	151	return -ENODEV;
	152	}
	153	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
a34c0932 JP	154	arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
a34c0932 JP	155	ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
1da177e4 LT	156	return -ENXIO;
1da177e4 LT	157	}
f0b9c27c	158	if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
a34c0932 JP	159	arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
a34c0932 JP	160	ioaddr);
1da177e4 LT	161	goto err_out;
1da177e4 LT	162	}
f0b9c27c	163	arcnet_inb(ioaddr, COM9026_REG_R_RESET);
1da177e4 LT	164	mdelay(RESETtime);
1da177e4 LT	165
f0b9c27c	166	status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	167
1da177e4 LT	168	if ((status & 0x9D) != (NORXflag \| RECONflag \| TXFREEflag \| RESETflag)) {
a34c0932 JP	169	arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
a34c0932 JP	170	status);
1da177e4 LT	171	goto err_out;
1da177e4 LT	172	}
a34c0932	173	arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
1da177e4	174
f0b9c27c JP	175	arcnet_outb(CFLAGScmd \| RESETclear \| CONFIGclear,
f0b9c27c JP	176	ioaddr, COM9026_REG_W_COMMAND);
1da177e4	177
a34c0932 JP	178	arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
a34c0932 JP	179	status);
1da177e4	180
f0b9c27c	181	status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	182
1da177e4 LT	183	if (status & RESETflag) {
a34c0932 JP	184	arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
a34c0932 JP	185	status);
1da177e4 LT	186	goto err_out;
1da177e4 LT	187	}
f0b9c27c JP	188	arcnet_outb((0x16 \| IOMAPflag) & ~ENABLE16flag,
f0b9c27c JP	189	ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	190
	191	/* Read first loc'n of memory */
	192
f0b9c27c JP	193	arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
f0b9c27c JP	194	arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO);
1da177e4	195
f0b9c27c	196	status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
97464edd	197	if (status != 0xd1) {
a34c0932 JP	198	arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
a34c0932 JP	199	status);
1da177e4 LT	200	goto err_out;
	201	}
	202	if (!dev->irq) {
f2f0a16b	203	/* if we do this, we're sure to get an IRQ since the
1da177e4 LT	204	* card has just reset and the NORXflag is on until
	205	* we tell it to start receiving.
	206	*/
	207
	208	airqmask = probe_irq_on();
f0b9c27c	209	arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
1da177e4	210	udelay(1);
f0b9c27c	211	arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
1da177e4 LT	212	dev->irq = probe_irq_off(airqmask);
1da177e4 LT	213
0a6efc78	214	if ((int)dev->irq <= 0) {
a34c0932	215	arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
1da177e4 LT	216	goto err_out;
	217	}
	218	}
	219	release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
	220	return com90io_found(dev);
	221
	222	err_out:
	223	release_region(ioaddr, ARCNET_TOTAL_SIZE);
	224	return -ENODEV;
	225	}
	226
1da177e4 LT	227	/* Set up the struct net_device associated with this card. Called after
	228	* probing succeeds.
	229	*/
	230	static int __init com90io_found(struct net_device *dev)
	231	{
	232	struct arcnet_local *lp;
	233	int ioaddr = dev->base_addr;
	234	int err;
	235
	236	/* Reserve the irq */
d6d7d3ed JP	237	if (request_irq(dev->irq, arcnet_interrupt, 0,
d6d7d3ed JP	238	"arcnet (COM90xx-IO)", dev)) {
a34c0932	239	arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
1da177e4 LT	240	return -ENODEV;
1da177e4 LT	241	}
fb911ee8	242	/* Reserve the I/O region */
d6d7d3ed JP	243	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
d6d7d3ed JP	244	"arcnet (COM90xx-IO)")) {
1da177e4 LT	245	free_irq(dev->irq, dev);
	246	return -EBUSY;
	247	}
	248
454d7c9b	249	lp = netdev_priv(dev);
1da177e4 LT	250	lp->card_name = "COM90xx I/O";
	251	lp->hw.command = com90io_command;
	252	lp->hw.status = com90io_status;
	253	lp->hw.intmask = com90io_setmask;
	254	lp->hw.reset = com90io_reset;
	255	lp->hw.owner = THIS_MODULE;
	256	lp->hw.copy_to_card = com90io_copy_to_card;
	257	lp->hw.copy_from_card = com90io_copy_from_card;
	258
	259	lp->config = (0x16 \| IOMAPflag) & ~ENABLE16flag;
f0b9c27c	260	arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	261
	262	/* get and check the station ID from offset 1 in shmem */
	263
	264	dev->dev_addr[0] = get_buffer_byte(dev, 1);
	265
	266	err = register_netdev(dev);
	267	if (err) {
f0b9c27c JP	268	arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
f0b9c27c JP	269	ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	270	free_irq(dev->irq, dev);
	271	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	272	return err;
	273	}
	274
a34c0932 JP	275	arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
a34c0932 JP	276	dev->dev_addr[0], dev->base_addr, dev->irq);
1da177e4 LT	277
	278	return 0;
	279	}
	280
f2f0a16b	281	/* Do a hardware reset on the card, and set up necessary registers.
1da177e4 LT	282	*
	283	* This should be called as little as possible, because it disrupts the
	284	* token on the network (causes a RECON) and requires a significant delay.
	285	*
	286	* However, it does make sure the card is in a defined state.
	287	*/
	288	static int com90io_reset(struct net_device *dev, int really_reset)
	289	{
454d7c9b	290	struct arcnet_local *lp = netdev_priv(dev);
1da177e4 LT	291	short ioaddr = dev->base_addr;
1da177e4 LT	292
a34c0932	293	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
f0b9c27c	294	dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
1da177e4 LT	295
	296	if (really_reset) {
	297	/* reset the card */
f0b9c27c	298	arcnet_inb(ioaddr, COM9026_REG_R_RESET);
1da177e4 LT	299	mdelay(RESETtime);
	300	}
	301	/* Set the thing to IO-mapped, 8-bit mode */
	302	lp->config = (0x1C \| IOMAPflag) & ~ENABLE16flag;
f0b9c27c	303	arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
1da177e4	304
f0b9c27c JP	305	arcnet_outb(CFLAGScmd \| RESETclear, ioaddr, COM9026_REG_W_COMMAND);
	306	/* clear flags & end reset */
	307	arcnet_outb(CFLAGScmd \| CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	308
	309	/* verify that the ARCnet signature byte is present */
	310	if (get_buffer_byte(dev, 0) != TESTvalue) {
a34c0932	311	arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
1da177e4 LT	312	return 1;
	313	}
	314	/* enable extended (512-byte) packets */
f0b9c27c	315	arcnet_outb(CONFIGcmd \| EXTconf, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	316	/* done! return success. */
	317	return 0;
	318	}
	319
1da177e4 LT	320	static void com90io_command(struct net_device *dev, int cmd)
	321	{
	322	short ioaddr = dev->base_addr;
	323
f0b9c27c	324	arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
1da177e4 LT	325	}
1da177e4 LT	326
1da177e4 LT	327	static int com90io_status(struct net_device *dev)
	328	{
	329	short ioaddr = dev->base_addr;
	330
f0b9c27c	331	return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
1da177e4 LT	332	}
1da177e4 LT	333
1da177e4 LT	334	static void com90io_setmask(struct net_device *dev, int mask)
	335	{
	336	short ioaddr = dev->base_addr;
	337
f0b9c27c	338	arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
1da177e4 LT	339	}
1da177e4 LT	340
d6d7d3ed JP	341	static void com90io_copy_to_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	342	int offset, void *buf, int count)
1da177e4	343	{
a34c0932 JP	344	TIME(dev, "put_whole_buffer", count,
a34c0932 JP	345	put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	346	}
1da177e4 LT	347
d6d7d3ed JP	348	static void com90io_copy_from_card(struct net_device *dev, int bufnum,
d6d7d3ed JP	349	int offset, void *buf, int count)
1da177e4	350	{
a34c0932 JP	351	TIME(dev, "get_whole_buffer", count,
a34c0932 JP	352	get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
1da177e4 LT	353	}
	354
	355	static int io; /* use the insmod io= irq= shmem= options */
	356	static int irq;
	357	static char device[9]; /* use eg. device=arc1 to change name */
	358
	359	module_param(io, int, 0);
	360	module_param(irq, int, 0);
	361	module_param_string(device, device, sizeof(device), 0);
	362	MODULE_LICENSE("GPL");
	363
	364	#ifndef MODULE
	365	static int __init com90io_setup(char *s)
	366	{
	367	int ints[4];
01a1d5ac	368
1da177e4 LT	369	s = get_options(s, 4, ints);
	370	if (!ints[0])
	371	return 0;
	372	switch (ints[0]) {
	373	default: /* ERROR */
05a24b23	374	pr_err("Too many arguments\n");
1da177e4 LT	375	case 2: /* IRQ */
	376	irq = ints[2];
	377	case 1: /* IO address */
	378	io = ints[1];
	379	}
	380	if (*s)
	381	snprintf(device, sizeof(device), "%s", s);
	382	return 1;
	383	}
	384	__setup("com90io=", com90io_setup);
	385	#endif
	386
	387	static struct net_device *my_dev;
	388
	389	static int __init com90io_init(void)
	390	{
	391	struct net_device *dev;
	392	int err;
	393
	394	dev = alloc_arcdev(device);
	395	if (!dev)
	396	return -ENOMEM;
	397
1da177e4 LT	398	dev->base_addr = io;
	399	dev->irq = irq;
	400	if (dev->irq == 2)
	401	dev->irq = 9;
	402
	403	err = com90io_probe(dev);
	404
	405	if (err) {
	406	free_netdev(dev);
	407	return err;
	408	}
	409
	410	my_dev = dev;
	411	return 0;
	412	}
	413
	414	static void __exit com90io_exit(void)
	415	{
	416	struct net_device *dev = my_dev;
	417	int ioaddr = dev->base_addr;
	418
	419	unregister_netdev(dev);
	420
d6d7d3ed JP	421	/* In case the old driver is loaded later,
	422	* set the thing back to MMAP mode
	423	*/
f0b9c27c JP	424	arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
f0b9c27c JP	425	ioaddr, COM9026_REG_RW_CONFIG);
1da177e4 LT	426
	427	free_irq(dev->irq, dev);
	428	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
	429	free_netdev(dev);
	430	}
	431
	432	module_init(com90io_init)
	433	module_exit(com90io_exit)