[net-next-2.6.git] / drivers / watchdog / ib700wdt.c

/*
 *	IB700 Single Board Computer WDT driver
 *
 *	(c) Copyright 2001 Charles Howes <chowes@vsol.net>
 *
 *	Based on advantechwdt.c which is based on acquirewdt.c which
 *	is based on wdt.c.
 *
 *	(c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
 *
 *	Based on acquirewdt.c which is based on wdt.c.
 *	Original copyright messages:
 *
 *	(c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
 *				http://www.redhat.com
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 *
 *	Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
 *	warranty for any of this software. This material is provided
 *	"AS-IS" and at no charge.
 *
 *	(c) Copyright 1995    Alan Cox <alan@redhat.com>
 *
 *	14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
 *	     Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
 *	     Added timeout module option to override default
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/ioport.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/uaccess.h>

#include <asm/system.h>

static struct platform_device *ibwdt_platform_device;
static unsigned long ibwdt_is_open;
static DEFINE_SPINLOCK(ibwdt_lock);
static char expect_close;

/* Module information */
#define DRV_NAME "ib700wdt"
#define PFX DRV_NAME ": "

/*
 *
 * Watchdog Timer Configuration
 *
 * The function of the watchdog timer is to reset the system
 * automatically and is defined at I/O port 0443H.  To enable the
 * watchdog timer and allow the system to reset, write I/O port 0443H.
 * To disable the timer, write I/O port 0441H for the system to stop the
 * watchdog function.  The timer has a tolerance of 20% for its
 * intervals.
 *
 * The following describes how the timer should be programmed.
 *
 * Enabling Watchdog:
 * MOV AX,000FH (Choose the values from 0 to F)
 * MOV DX,0443H
 * OUT DX,AX
 *
 * Disabling Watchdog:
 * MOV AX,000FH (Any value is fine.)
 * MOV DX,0441H
 * OUT DX,AX
 *
 * Watchdog timer control table:
 * Level   Value  Time/sec | Level Value Time/sec
 *   1       F       0     |   9     7      16
 *   2       E       2     |   10    6      18
 *   3       D       4     |   11    5      20
 *   4       C       6     |   12    4      22
 *   5       B       8     |   13    3      24
 *   6       A       10    |   14    2      26
 *   7       9       12    |   15    1      28
 *   8       8       14    |   16    0      30
 *
 */

static int wd_times[] = {
	30,	/* 0x0 */
	28,	/* 0x1 */
	26,	/* 0x2 */
	24,	/* 0x3 */
	22,	/* 0x4 */
	20,	/* 0x5 */
	18,	/* 0x6 */
	16,	/* 0x7 */
	14,	/* 0x8 */
	12,	/* 0x9 */
	10,	/* 0xA */
	8,	/* 0xB */
	6,	/* 0xC */
	4,	/* 0xD */
	2,	/* 0xE */
	0,	/* 0xF */
};

#define WDT_STOP 0x441
#define WDT_START 0x443

/* Default timeout */
#define WD_TIMO 0		/* 30 seconds +/- 20%, from table */

static int wd_margin = WD_TIMO;

static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout,
		"Watchdog cannot be stopped once started (default="
				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");


/*
 *	Watchdog Operations
 */

static void ibwdt_ping(void)
{
	spin_lock(&ibwdt_lock);

	/* Write a watchdog value */
	outb_p(wd_margin, WDT_START);

	spin_unlock(&ibwdt_lock);
}

static void ibwdt_disable(void)
{
	spin_lock(&ibwdt_lock);
	outb_p(0, WDT_STOP);
	spin_unlock(&ibwdt_lock);
}

static int ibwdt_set_heartbeat(int t)
{
	int i;

	if ((t < 0) || (t > 30))
		return -EINVAL;

	for (i = 0x0F; i > -1; i--)
		if (wd_times[i] >= t)
			break;
	wd_margin = i;
	return 0;
}

/*
 *	/dev/watchdog handling
 */

static ssize_t ibwdt_write(struct file *file, const char __user *buf,
						size_t count, loff_t *ppos)
{
	if (count) {
		if (!nowayout) {
			size_t i;

			/* In case it was set long ago */
			expect_close = 0;

			for (i = 0; i != count; i++) {
				char c;
				if (get_user(c, buf + i))
					return -EFAULT;
				if (c == 'V')
					expect_close = 42;
			}
		}
		ibwdt_ping();
	}
	return count;
}

static long ibwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	int new_margin;
	void __user *argp = (void __user *)arg;
	int __user *p = argp;

	static struct watchdog_info ident = {
		.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
							| WDIOF_MAGICCLOSE,
		.firmware_version = 1,
		.identity = "IB700 WDT",
	};

	switch (cmd) {
	case WDIOC_GETSUPPORT:
		if (copy_to_user(argp, &ident, sizeof(ident)))
			return -EFAULT;
		break;

	case WDIOC_GETSTATUS:
	case WDIOC_GETBOOTSTATUS:
		return put_user(0, p);

	case WDIOC_SETOPTIONS:
	{
		int options, retval = -EINVAL;

		if (get_user(options, p))
			return -EFAULT;

		if (options & WDIOS_DISABLECARD) {
			ibwdt_disable();
			retval = 0;
		}
		if (options & WDIOS_ENABLECARD) {
			ibwdt_ping();
			retval = 0;
		}
		return retval;
	}
	case WDIOC_KEEPALIVE:
		ibwdt_ping();
		break;

	case WDIOC_SETTIMEOUT:
		if (get_user(new_margin, p))
			return -EFAULT;
		if (ibwdt_set_heartbeat(new_margin))
			return -EINVAL;
		ibwdt_ping();
		/* Fall */

	case WDIOC_GETTIMEOUT:
		return put_user(wd_times[wd_margin], p);

	default:
		return -ENOTTY;
	}
	return 0;
}

static int ibwdt_open(struct inode *inode, struct file *file)
{
	if (test_and_set_bit(0, &ibwdt_is_open))
		return -EBUSY;
	if (nowayout)
		__module_get(THIS_MODULE);

	/* Activate */
	ibwdt_ping();
	return nonseekable_open(inode, file);
}

static int ibwdt_close(struct inode *inode, struct file *file)
{
	if (expect_close == 42) {
		ibwdt_disable();
	} else {
		printk(KERN_CRIT PFX
		     "WDT device closed unexpectedly.  WDT will not stop!\n");
		ibwdt_ping();
	}
	clear_bit(0, &ibwdt_is_open);
	expect_close = 0;
	return 0;
}

/*
 *	Kernel Interfaces
 */

static const struct file_operations ibwdt_fops = {
	.owner		= THIS_MODULE,
	.llseek		= no_llseek,
	.write		= ibwdt_write,
	.unlocked_ioctl	= ibwdt_ioctl,
	.open		= ibwdt_open,
	.release	= ibwdt_close,
};

static struct miscdevice ibwdt_miscdev = {
	.minor = WATCHDOG_MINOR,
	.name = "watchdog",
	.fops = &ibwdt_fops,
};

/*
 *	Init & exit routines
 */

static int __devinit ibwdt_probe(struct platform_device *dev)
{
	int res;

#if WDT_START != WDT_STOP
	if (!request_region(WDT_STOP, 1, "IB700 WDT")) {
		printk(KERN_ERR PFX "STOP method I/O %X is not available.\n",
								WDT_STOP);
		res = -EIO;
		goto out_nostopreg;
	}
#endif

	if (!request_region(WDT_START, 1, "IB700 WDT")) {
		printk(KERN_ERR PFX "START method I/O %X is not available.\n",
								WDT_START);
		res = -EIO;
		goto out_nostartreg;
	}

	res = misc_register(&ibwdt_miscdev);
	if (res) {
		printk(KERN_ERR PFX "failed to register misc device\n");
		goto out_nomisc;
	}
	return 0;

out_nomisc:
	release_region(WDT_START, 1);
out_nostartreg:
#if WDT_START != WDT_STOP
	release_region(WDT_STOP, 1);
#endif
out_nostopreg:
	return res;
}

static int __devexit ibwdt_remove(struct platform_device *dev)
{
	misc_deregister(&ibwdt_miscdev);
	release_region(WDT_START, 1);
#if WDT_START != WDT_STOP
	release_region(WDT_STOP, 1);
#endif
	return 0;
}

static void ibwdt_shutdown(struct platform_device *dev)
{
	/* Turn the WDT off if we have a soft shutdown */
	ibwdt_disable();
}

static struct platform_driver ibwdt_driver = {
	.probe		= ibwdt_probe,
	.remove		= __devexit_p(ibwdt_remove),
	.shutdown	= ibwdt_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= DRV_NAME,
	},
};

static int __init ibwdt_init(void)
{
	int err;

	printk(KERN_INFO PFX
		"WDT driver for IB700 single board computer initialising.\n");

	err = platform_driver_register(&ibwdt_driver);
	if (err)
		return err;

	ibwdt_platform_device = platform_device_register_simple(DRV_NAME,
								-1, NULL, 0);
	if (IS_ERR(ibwdt_platform_device)) {
		err = PTR_ERR(ibwdt_platform_device);
		goto unreg_platform_driver;
	}

	return 0;

unreg_platform_driver:
	platform_driver_unregister(&ibwdt_driver);
	return err;
}

static void __exit ibwdt_exit(void)
{
	platform_device_unregister(ibwdt_platform_device);
	platform_driver_unregister(&ibwdt_driver);
	printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
}

module_init(ibwdt_init);
module_exit(ibwdt_exit);

MODULE_AUTHOR("Charles Howes <chowes@vsol.net>");
MODULE_DESCRIPTION("IB700 SBC watchdog driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);

/* end of ib700wdt.c */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* IB700 Single Board Computer WDT driver
	3	*
	4	* (c) Copyright 2001 Charles Howes <chowes@vsol.net>
	5	*
c9d7710e WVS	6	* Based on advantechwdt.c which is based on acquirewdt.c which
c9d7710e WVS	7	* is based on wdt.c.
1da177e4 LT	8	*
	9	* (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
	10	*
	11	* Based on acquirewdt.c which is based on wdt.c.
	12	* Original copyright messages:
	13	*
	14	* (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
	15	* http://www.redhat.com
	16	*
	17	* This program is free software; you can redistribute it and/or
	18	* modify it under the terms of the GNU General Public License
	19	* as published by the Free Software Foundation; either version
	20	* 2 of the License, or (at your option) any later version.
	21	*
	22	* Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
	23	* warranty for any of this software. This material is provided
	24	* "AS-IS" and at no charge.
	25	*
	26	* (c) Copyright 1995 Alan Cox <alan@redhat.com>
	27	*
c9d7710e WVS	28	* 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
	29	* Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
	30	* Added timeout module option to override default
1da177e4 LT	31	*
	32	*/
	33
1da177e4 LT	34	#include <linux/module.h>
	35	#include <linux/types.h>
	36	#include <linux/miscdevice.h>
	37	#include <linux/watchdog.h>
	38	#include <linux/ioport.h>
1da177e4	39	#include <linux/fs.h>
1da177e4 LT	40	#include <linux/init.h>
	41	#include <linux/spinlock.h>
	42	#include <linux/moduleparam.h>
745ac1ea	43	#include <linux/platform_device.h>
2e43ba73 AC	44	#include <linux/io.h>
2e43ba73 AC	45	#include <linux/uaccess.h>
089ab079	46
1da177e4 LT	47	#include <asm/system.h>
1da177e4 LT	48
745ac1ea	49	static struct platform_device *ibwdt_platform_device;
1da177e4	50	static unsigned long ibwdt_is_open;
c7dfd0cc	51	static DEFINE_SPINLOCK(ibwdt_lock);
1da177e4 LT	52	static char expect_close;
1da177e4 LT	53
745ac1ea WVS	54	/* Module information */
	55	#define DRV_NAME "ib700wdt"
	56	#define PFX DRV_NAME ": "
1da177e4 LT	57
	58	/*
	59	*
	60	* Watchdog Timer Configuration
	61	*
	62	* The function of the watchdog timer is to reset the system
	63	* automatically and is defined at I/O port 0443H. To enable the
	64	* watchdog timer and allow the system to reset, write I/O port 0443H.
	65	* To disable the timer, write I/O port 0441H for the system to stop the
	66	* watchdog function. The timer has a tolerance of 20% for its
	67	* intervals.
	68	*
	69	* The following describes how the timer should be programmed.
	70	*
	71	* Enabling Watchdog:
	72	* MOV AX,000FH (Choose the values from 0 to F)
	73	* MOV DX,0443H
	74	* OUT DX,AX
	75	*
	76	* Disabling Watchdog:
	77	* MOV AX,000FH (Any value is fine.)
	78	* MOV DX,0441H
	79	* OUT DX,AX
	80	*
	81	* Watchdog timer control table:
	82	* Level Value Time/sec \| Level Value Time/sec
	83	* 1 F 0 \| 9 7 16
	84	* 2 E 2 \| 10 6 18
	85	* 3 D 4 \| 11 5 20
	86	* 4 C 6 \| 12 4 22
	87	* 5 B 8 \| 13 3 24
	88	* 6 A 10 \| 14 2 26
	89	* 7 9 12 \| 15 1 28
	90	* 8 8 14 \| 16 0 30
	91	*
	92	*/
	93
	94	static int wd_times[] = {
	95	30, /* 0x0 */
	96	28, /* 0x1 */
	97	26, /* 0x2 */
	98	24, /* 0x3 */
	99	22, /* 0x4 */
	100	20, /* 0x5 */
	101	18, /* 0x6 */
	102	16, /* 0x7 */
	103	14, /* 0x8 */
	104	12, /* 0x9 */
	105	10, /* 0xA */
	106	8, /* 0xB */
	107	6, /* 0xC */
	108	4, /* 0xD */
	109	2, /* 0xE */
	110	0, /* 0xF */
	111	};
	112
	113	#define WDT_STOP 0x441
	114	#define WDT_START 0x443
	115
	116	/* Default timeout */
	117	#define WD_TIMO 0 /* 30 seconds +/- 20%, from table */
	118
	119	static int wd_margin = WD_TIMO;
	120
4bfdf378	121	static int nowayout = WATCHDOG_NOWAYOUT;
1da177e4	122	module_param(nowayout, int, 0);
2e43ba73 AC	123	MODULE_PARM_DESC(nowayout,
	124	"Watchdog cannot be stopped once started (default="
	125	__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
1da177e4 LT	126
	127
	128	/*
35d55c94	129	* Watchdog Operations
1da177e4 LT	130	*/
1da177e4 LT	131
7944d3a5	132	static void ibwdt_ping(void)
1da177e4	133	{
e42162a4 WVS	134	spin_lock(&ibwdt_lock);
e42162a4 WVS	135
1da177e4 LT	136	/* Write a watchdog value */
1da177e4 LT	137	outb_p(wd_margin, WDT_START);
e42162a4 WVS	138
e42162a4 WVS	139	spin_unlock(&ibwdt_lock);
1da177e4 LT	140	}
1da177e4 LT	141
7944d3a5	142	static void ibwdt_disable(void)
35d55c94	143	{
e42162a4	144	spin_lock(&ibwdt_lock);
35d55c94	145	outb_p(0, WDT_STOP);
e42162a4	146	spin_unlock(&ibwdt_lock);
35d55c94 WVS	147	}
35d55c94 WVS	148
7944d3a5	149	static int ibwdt_set_heartbeat(int t)
35d55c94 WVS	150	{
	151	int i;
	152
	153	if ((t < 0) \|\| (t > 30))
	154	return -EINVAL;
	155
	156	for (i = 0x0F; i > -1; i--)
7c2500f1	157	if (wd_times[i] >= t)
35d55c94 WVS	158	break;
	159	wd_margin = i;
	160	return 0;
	161	}
	162
	163	/*
	164	* /dev/watchdog handling
	165	*/
	166
2e43ba73 AC	167	static ssize_t ibwdt_write(struct file file, const char __user buf,
2e43ba73 AC	168	size_t count, loff_t *ppos)
1da177e4 LT	169	{
	170	if (count) {
	171	if (!nowayout) {
	172	size_t i;
	173
	174	/* In case it was set long ago */
	175	expect_close = 0;
	176
	177	for (i = 0; i != count; i++) {
	178	char c;
	179	if (get_user(c, buf + i))
	180	return -EFAULT;
	181	if (c == 'V')
	182	expect_close = 42;
	183	}
	184	}
	185	ibwdt_ping();
	186	}
	187	return count;
	188	}
	189
2e43ba73	190	static long ibwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1da177e4	191	{
35d55c94	192	int new_margin;
1da177e4 LT	193	void __user argp = (void __user )arg;
	194	int __user *p = argp;
	195
	196	static struct watchdog_info ident = {
2e43ba73 AC	197	.options = WDIOF_KEEPALIVEPING \| WDIOF_SETTIMEOUT
2e43ba73 AC	198	\| WDIOF_MAGICCLOSE,
1da177e4 LT	199	.firmware_version = 1,
	200	.identity = "IB700 WDT",
	201	};
	202
	203	switch (cmd) {
	204	case WDIOC_GETSUPPORT:
2e43ba73 AC	205	if (copy_to_user(argp, &ident, sizeof(ident)))
	206	return -EFAULT;
	207	break;
1da177e4 LT	208
1da177e4 LT	209	case WDIOC_GETSTATUS:
c9d7710e	210	case WDIOC_GETBOOTSTATUS:
2e43ba73	211	return put_user(0, p);
1da177e4	212
e42162a4 WVS	213	case WDIOC_SETOPTIONS:
e42162a4 WVS	214	{
2e43ba73	215	int options, retval = -EINVAL;
e42162a4	216
2e43ba73 AC	217	if (get_user(options, p))
2e43ba73 AC	218	return -EFAULT;
e42162a4	219
2e43ba73 AC	220	if (options & WDIOS_DISABLECARD) {
	221	ibwdt_disable();
	222	retval = 0;
	223	}
	224	if (options & WDIOS_ENABLECARD) {
	225	ibwdt_ping();
	226	retval = 0;
	227	}
	228	return retval;
e42162a4	229	}
0c06090c WVS	230	case WDIOC_KEEPALIVE:
	231	ibwdt_ping();
	232	break;
	233
	234	case WDIOC_SETTIMEOUT:
	235	if (get_user(new_margin, p))
	236	return -EFAULT;
	237	if (ibwdt_set_heartbeat(new_margin))
	238	return -EINVAL;
	239	ibwdt_ping();
	240	/* Fall */
	241
	242	case WDIOC_GETTIMEOUT:
	243	return put_user(wd_times[wd_margin], p);
	244
1da177e4	245	default:
2e43ba73	246	return -ENOTTY;
1da177e4 LT	247	}
	248	return 0;
	249	}
	250
2e43ba73	251	static int ibwdt_open(struct inode inode, struct file file)
1da177e4	252	{
2e43ba73	253	if (test_and_set_bit(0, &ibwdt_is_open))
1da177e4	254	return -EBUSY;
1da177e4 LT	255	if (nowayout)
	256	__module_get(THIS_MODULE);
	257
	258	/* Activate */
	259	ibwdt_ping();
1da177e4 LT	260	return nonseekable_open(inode, file);
	261	}
	262
7944d3a5	263	static int ibwdt_close(struct inode inode, struct file file)
1da177e4	264	{
c9d7710e	265	if (expect_close == 42) {
35d55c94	266	ibwdt_disable();
c9d7710e	267	} else {
2e43ba73 AC	268	printk(KERN_CRIT PFX
2e43ba73 AC	269	"WDT device closed unexpectedly. WDT will not stop!\n");
c9d7710e WVS	270	ibwdt_ping();
c9d7710e WVS	271	}
1da177e4 LT	272	clear_bit(0, &ibwdt_is_open);
1da177e4 LT	273	expect_close = 0;
1da177e4 LT	274	return 0;
	275	}
	276
1da177e4 LT	277	/*
	278	* Kernel Interfaces
	279	*/
	280
62322d25	281	static const struct file_operations ibwdt_fops = {
1da177e4 LT	282	.owner = THIS_MODULE,
	283	.llseek = no_llseek,
	284	.write = ibwdt_write,
2e43ba73	285	.unlocked_ioctl = ibwdt_ioctl,
1da177e4 LT	286	.open = ibwdt_open,
	287	.release = ibwdt_close,
	288	};
	289
	290	static struct miscdevice ibwdt_miscdev = {
	291	.minor = WATCHDOG_MINOR,
	292	.name = "watchdog",
	293	.fops = &ibwdt_fops,
	294	};
	295
f6e48039 WVS	296	/*
	297	* Init & exit routines
	298	*/
	299
745ac1ea	300	static int __devinit ibwdt_probe(struct platform_device *dev)
1da177e4 LT	301	{
	302	int res;
	303
1da177e4 LT	304	#if WDT_START != WDT_STOP
1da177e4 LT	305	if (!request_region(WDT_STOP, 1, "IB700 WDT")) {
2e43ba73 AC	306	printk(KERN_ERR PFX "STOP method I/O %X is not available.\n",
2e43ba73 AC	307	WDT_STOP);
1da177e4 LT	308	res = -EIO;
	309	goto out_nostopreg;
	310	}
	311	#endif
	312
	313	if (!request_region(WDT_START, 1, "IB700 WDT")) {
2e43ba73 AC	314	printk(KERN_ERR PFX "START method I/O %X is not available.\n",
2e43ba73 AC	315	WDT_START);
1da177e4 LT	316	res = -EIO;
	317	goto out_nostartreg;
	318	}
f6e48039	319
f6e48039 WVS	320	res = misc_register(&ibwdt_miscdev);
f6e48039 WVS	321	if (res) {
2e43ba73	322	printk(KERN_ERR PFX "failed to register misc device\n");
f6e48039 WVS	323	goto out_nomisc;
f6e48039 WVS	324	}
1da177e4 LT	325	return 0;
1da177e4 LT	326
f6e48039	327	out_nomisc:
1da177e4 LT	328	release_region(WDT_START, 1);
	329	out_nostartreg:
	330	#if WDT_START != WDT_STOP
	331	release_region(WDT_STOP, 1);
	332	#endif
	333	out_nostopreg:
1da177e4 LT	334	return res;
	335	}
	336
745ac1ea	337	static int __devexit ibwdt_remove(struct platform_device *dev)
1da177e4 LT	338	{
1da177e4 LT	339	misc_deregister(&ibwdt_miscdev);
2e43ba73	340	release_region(WDT_START, 1);
1da177e4	341	#if WDT_START != WDT_STOP
2e43ba73	342	release_region(WDT_STOP, 1);
1da177e4	343	#endif
745ac1ea WVS	344	return 0;
	345	}
	346
35fcf538 WVS	347	static void ibwdt_shutdown(struct platform_device *dev)
	348	{
	349	/* Turn the WDT off if we have a soft shutdown */
	350	ibwdt_disable();
	351	}
	352
745ac1ea WVS	353	static struct platform_driver ibwdt_driver = {
	354	.probe = ibwdt_probe,
	355	.remove = __devexit_p(ibwdt_remove),
35fcf538	356	.shutdown = ibwdt_shutdown,
745ac1ea WVS	357	.driver = {
	358	.owner = THIS_MODULE,
	359	.name = DRV_NAME,
	360	},
	361	};
	362
	363	static int __init ibwdt_init(void)
	364	{
	365	int err;
	366
2e43ba73 AC	367	printk(KERN_INFO PFX
2e43ba73 AC	368	"WDT driver for IB700 single board computer initialising.\n");
745ac1ea WVS	369
	370	err = platform_driver_register(&ibwdt_driver);
	371	if (err)
	372	return err;
	373
2e43ba73 AC	374	ibwdt_platform_device = platform_device_register_simple(DRV_NAME,
2e43ba73 AC	375	-1, NULL, 0);
745ac1ea WVS	376	if (IS_ERR(ibwdt_platform_device)) {
	377	err = PTR_ERR(ibwdt_platform_device);
	378	goto unreg_platform_driver;
	379	}
	380
	381	return 0;
	382
	383	unreg_platform_driver:
	384	platform_driver_unregister(&ibwdt_driver);
	385	return err;
	386	}
	387
	388	static void __exit ibwdt_exit(void)
	389	{
	390	platform_device_unregister(ibwdt_platform_device);
	391	platform_driver_unregister(&ibwdt_driver);
	392	printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
1da177e4 LT	393	}
	394
	395	module_init(ibwdt_init);
	396	module_exit(ibwdt_exit);
	397
	398	MODULE_AUTHOR("Charles Howes <chowes@vsol.net>");
	399	MODULE_DESCRIPTION("IB700 SBC watchdog driver");
	400	MODULE_LICENSE("GPL");
	401	MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
	402
	403	/* end of ib700wdt.c */