path: root/drivers/watchdog/iTCO_wdt.c

/*
 *	intel TCO Watchdog Driver
 *
 *	(c) Copyright 2006-2010 Wim Van Sebroeck <wim@iguana.be>.
 *
 *	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 Wim Van Sebroeck nor Iguana vzw. admit liability nor
 *	provide warranty for any of this software. This material is
 *	provided "AS-IS" and at no charge.
 *
 *	The TCO watchdog is implemented in the following I/O controller hubs:
 *	(See the intel documentation on http://developer.intel.com.)
 *	document number 290655-003, 290677-014: 82801AA (ICH), 82801AB (ICHO)
 *	document number 290687-002, 298242-027: 82801BA (ICH2)
 *	document number 290733-003, 290739-013: 82801CA (ICH3-S)
 *	document number 290716-001, 290718-007: 82801CAM (ICH3-M)
 *	document number 290744-001, 290745-025: 82801DB (ICH4)
 *	document number 252337-001, 252663-008: 82801DBM (ICH4-M)
 *	document number 273599-001, 273645-002: 82801E (C-ICH)
 *	document number 252516-001, 252517-028: 82801EB (ICH5), 82801ER (ICH5R)
 *	document number 300641-004, 300884-013: 6300ESB
 *	document number 301473-002, 301474-026: 82801F (ICH6)
 *	document number 313082-001, 313075-006: 631xESB, 632xESB
 *	document number 307013-003, 307014-024: 82801G (ICH7)
 *	document number 322896-001, 322897-001: NM10
 *	document number 313056-003, 313057-017: 82801H (ICH8)
 *	document number 316972-004, 316973-012: 82801I (ICH9)
 *	document number 319973-002, 319974-002: 82801J (ICH10)
 *	document number 322169-001, 322170-003: 5 Series, 3400 Series (PCH)
 *	document number 320066-003, 320257-008: EP80597 (IICH)
 *	document number 324645-001, 324646-001: Cougar Point (CPT)
 *	document number TBD                   : Patsburg (PBG)
 *	document number TBD                   : DH89xxCC
 *	document number TBD                   : Panther Point
 */

/*
 *	Includes, defines, variables, module parameters, ...
 */

/* Module and version information */
#define DRV_NAME	"iTCO_wdt"
#define DRV_VERSION	"1.06"
#define PFX		DRV_NAME ": "

/* Includes */
#include <linux/module.h>		/* For module specific items */
#include <linux/moduleparam.h>		/* For new moduleparam's */
#include <linux/types.h>		/* For standard types (like size_t) */
#include <linux/errno.h>		/* For the -ENODEV/... values */
#include <linux/kernel.h>		/* For printk/panic/... */
#include <linux/miscdevice.h>		/* For MODULE_ALIAS_MISCDEV
							(WATCHDOG_MINOR) */
#include <linux/watchdog.h>		/* For the watchdog specific items */
#include <linux/init.h>			/* For __init/__exit/... */
#include <linux/fs.h>			/* For file operations */
#include <linux/platform_device.h>	/* For platform_driver framework */
#include <linux/pci.h>			/* For pci functions */
#include <linux/ioport.h>		/* For io-port access */
#include <linux/spinlock.h>		/* For spin_lock/spin_unlock/... */
#include <linux/uaccess.h>		/* For copy_to_user/put_user/... */
#include <linux/io.h>			/* For inb/outb/... */

#include "iTCO_vendor.h"

/* TCO related info */
enum iTCO_chipsets {
	TCO_ICH = 0,	/* ICH */
	TCO_ICH0,	/* ICH0 */
	TCO_ICH2,	/* ICH2 */
	TCO_ICH2M,	/* ICH2-M */
	TCO_ICH3,	/* ICH3-S */
	TCO_ICH3M,	/* ICH3-M */
	TCO_ICH4,	/* ICH4 */
	TCO_ICH4M,	/* ICH4-M */
	TCO_CICH,	/* C-ICH */
	TCO_ICH5,	/* ICH5 & ICH5R */
	TCO_6300ESB,	/* 6300ESB */
	TCO_ICH6,	/* ICH6 & ICH6R */
	TCO_ICH6M,	/* ICH6-M */
	TCO_ICH6W,	/* ICH6W & ICH6RW */
	TCO_631XESB,	/* 631xESB/632xESB */
	TCO_ICH7,	/* ICH7 & ICH7R */
	TCO_ICH7DH,	/* ICH7DH */
	TCO_ICH7M,	/* ICH7-M & ICH7-U */
	TCO_ICH7MDH,	/* ICH7-M DH */
	TCO_NM10,	/* NM10 */
	TCO_ICH8,	/* ICH8 & ICH8R */
	TCO_ICH8DH,	/* ICH8DH */
	TCO_ICH8DO,	/* ICH8DO */
	TCO_ICH8M,	/* ICH8M */
	TCO_ICH8ME,	/* ICH8M-E */
	TCO_ICH9,	/* ICH9 */
	TCO_ICH9R,	/* ICH9R */
	TCO_ICH9DH,	/* ICH9DH */
	TCO_ICH9DO,	/* ICH9DO */
	TCO_ICH9M,	/* ICH9M */
	TCO_ICH9ME,	/* ICH9M-E */
	TCO_ICH10,	/* ICH10 */
	TCO_ICH10R,	/* ICH10R */
	TCO_ICH10D,	/* ICH10D */
	TCO_ICH10DO,	/* ICH10DO */
	TCO_PCH,	/* PCH Desktop Full Featured */
	TCO_PCHM,	/* PCH Mobile Full Featured */
	TCO_P55,	/* P55 */
	TCO_PM55,	/* PM55 */
	TCO_H55,	/* H55 */
	TCO_QM57,	/* QM57 */
	TCO_H57,	/* H57 */
	TCO_HM55,	/* HM55 */
	TCO_Q57,	/* Q57 */
	TCO_HM57,	/* HM57 */
	TCO_PCHMSFF,	/* PCH Mobile SFF Full Featured */
	TCO_QS57,	/* QS57 */
	TCO_3400,	/* 3400 */
	TCO_3420,	/* 3420 */
	TCO_3450,	/* 3450 */
	TCO_EP80579,	/* EP80579 */
	TCO_CPT1,	/* Cougar Point */
	TCO_CPT2,	/* Cougar Point Desktop */
	TCO_CPT3,	/* Cougar Point Mobile */
	TCO_CPT4,	/* Cougar Point */
	TCO_CPT5,	/* Cougar Point */
	TCO_CPT6,	/* Cougar Point */
	TCO_CPT7,	/* Cougar Point */
	TCO_CPT8,	/* Cougar Point */
	TCO_CPT9,	/* Cougar Point */
	TCO_CPT10,	/* Cougar Point */
	TCO_CPT11,	/* Cougar Point */
	TCO_CPT12,	/* Cougar Point */
	TCO_CPT13,	/* Cougar Point */
	TCO_CPT14,	/* Cougar Point */
	TCO_CPT15,	/* Cougar Point */
	TCO_CPT16,	/* Cougar Point */
	TCO_CPT17,	/* Cougar Point */
	TCO_CPT18,	/* Cougar Point */
	TCO_CPT19,	/* Cougar Point */
	TCO_CPT20,	/* Cougar Point */
	TCO_CPT21,	/* Cougar Point */
	TCO_CPT22,	/* Cougar Point */
	TCO_CPT23,	/* Cougar Point */
	TCO_CPT24,	/* Cougar Point */
	TCO_CPT25,	/* Cougar Point */
	TCO_CPT26,	/* Cougar Point */
	TCO_CPT27,	/* Cougar Point */
	TCO_CPT28,	/* Cougar Point */
	TCO_CPT29,	/* Cougar Point */
	TCO_CPT30,	/* Cougar Point */
	TCO_CPT31,	/* Cougar Point */
	TCO_PBG1,	/* Patsburg */
	TCO_PBG2,	/* Patsburg */
	TCO_DH89XXCC,	/* DH89xxCC */
	TCO_PPT0,	/* Panther Point */
	TCO_PPT1,	/* Panther Point */
	TCO_PPT2,	/* Panther Point */
	TCO_PPT3,	/* Panther Point */