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@@ -1,571 +0,0 @@
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-/*
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- * i8xx_tco: TCO timer driver for i8xx chipsets
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- *
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- * (c) Copyright 2000 kernel concepts <nils@kernelconcepts.de>, All Rights Reserved.
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- * http://www.kernelconcepts.de
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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- *
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- * Neither kernel concepts nor Nils Faerber admit liability nor provide
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- * warranty for any of this software. This material is provided
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- * "AS-IS" and at no charge.
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- *
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- * (c) Copyright 2000 kernel concepts <nils@kernelconcepts.de>
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- * developed for
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- * Jentro AG, Haar/Munich (Germany)
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- *
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- * TCO timer driver for i8xx chipsets
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- * based on softdog.c by Alan Cox <alan@redhat.com>
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- *
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- * The TCO timer is implemented in the following I/O controller hubs:
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- * (See the intel documentation on http://developer.intel.com.)
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- * 82801AA (ICH) : document number 290655-003, 290677-014,
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- * 82801AB (ICHO) : document number 290655-003, 290677-014,
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- * 82801BA (ICH2) : document number 290687-002, 298242-027,
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- * 82801BAM (ICH2-M) : document number 290687-002, 298242-027,
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- * 82801CA (ICH3-S) : document number 290733-003, 290739-013,
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- * 82801CAM (ICH3-M) : document number 290716-001, 290718-007,
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- * 82801DB (ICH4) : document number 290744-001, 290745-020,
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- * 82801DBM (ICH4-M) : document number 252337-001, 252663-005,
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- * 82801E (C-ICH) : document number 273599-001, 273645-002,
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- * 82801EB (ICH5) : document number 252516-001, 252517-003,
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- * 82801ER (ICH5R) : document number 252516-001, 252517-003,
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- *
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- * 20000710 Nils Faerber
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- * Initial Version 0.01
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- * 20000728 Nils Faerber
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- * 0.02 Fix for SMI_EN->TCO_EN bit, some cleanups
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- * 20011214 Matt Domsch <Matt_Domsch@dell.com>
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- * 0.03 Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
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- * Didn't add timeout option as i810_margin already exists.
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- * 20020224 Joel Becker, Wim Van Sebroeck
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- * 0.04 Support for 82801CA(M) chipset, timer margin needs to be > 3,
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- * add support for WDIOC_SETTIMEOUT and WDIOC_GETTIMEOUT.
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- * 20020412 Rob Radez <rob@osinvestor.com>, Wim Van Sebroeck
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- * 0.05 Fix possible timer_alive race, add expect close support,
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- * clean up ioctls (WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS and
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- * WDIOC_SETOPTIONS), made i810tco_getdevice __init,
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- * removed boot_status, removed tco_timer_read,
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- * added support for 82801DB and 82801E chipset,
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- * added support for 82801EB and 8280ER chipset,
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- * general cleanup.
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- * 20030921 Wim Van Sebroeck <wim@iguana.be>
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- * 0.06 change i810_margin to heartbeat, use module_param,
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- * added notify system support, renamed module to i8xx_tco.
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- * 20050128 Wim Van Sebroeck <wim@iguana.be>
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- * 0.07 Added support for the ICH4-M, ICH6, ICH6R, ICH6-M, ICH6W and ICH6RW
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- * chipsets. Also added support for the "undocumented" ICH7 chipset.
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- * 20050807 Wim Van Sebroeck <wim@iguana.be>
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- * 0.08 Make sure that the watchdog is only "armed" when started.
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- * (Kernel Bug 4251)
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- * 20060416 Wim Van Sebroeck <wim@iguana.be>
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- * 0.09 Remove support for the ICH6, ICH6R, ICH6-M, ICH6W and ICH6RW and
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- * ICH7 chipsets. (See Kernel Bug 6031 - other code will support these
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- * chipsets)
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- */
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-
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-/*
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- * Includes, defines, variables, module parameters, ...
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- */
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-
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-#include <linux/module.h>
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-#include <linux/moduleparam.h>
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-#include <linux/types.h>
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-#include <linux/miscdevice.h>
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-#include <linux/watchdog.h>
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-#include <linux/notifier.h>
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-#include <linux/reboot.h>
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-#include <linux/init.h>
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-#include <linux/fs.h>
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-#include <linux/pci.h>
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-#include <linux/ioport.h>
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-
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-#include <asm/uaccess.h>
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-#include <asm/io.h>
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-
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-#include "i8xx_tco.h"
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-
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-/* Module and version information */
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-#define TCO_VERSION "0.09"
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-#define TCO_MODULE_NAME "i8xx TCO timer"
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-#define TCO_DRIVER_NAME TCO_MODULE_NAME ", v" TCO_VERSION
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-#define PFX TCO_MODULE_NAME ": "
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-
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-/* internal variables */
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-static unsigned int ACPIBASE;
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-static spinlock_t tco_lock; /* Guards the hardware */
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-static unsigned long timer_alive;
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-static char tco_expect_close;
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-static struct pci_dev *i8xx_tco_pci;
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-
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-/* module parameters */
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-#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat (2<heartbeat<39) */
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-static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
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-module_param(heartbeat, int, 0);
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-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<heartbeat<39, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
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-
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-static int nowayout = WATCHDOG_NOWAYOUT;
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-module_param(nowayout, int, 0);
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-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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-
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-/*
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- * Some TCO specific functions
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- */
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-
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-static inline unsigned char seconds_to_ticks(int seconds)
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-{
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- /* the internal timer is stored as ticks which decrement
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- * every 0.6 seconds */
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- return (seconds * 10) / 6;
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-}
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-
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-static int tco_timer_start (void)
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-{
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- unsigned char val;
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-
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- spin_lock(&tco_lock);
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-
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- /* disable chipset's NO_REBOOT bit */
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- pci_read_config_byte (i8xx_tco_pci, 0xd4, &val);
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- val &= 0xfd;
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- pci_write_config_byte (i8xx_tco_pci, 0xd4, val);
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-
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- /* Bit 11: TCO Timer Halt -> 0 = The TCO timer is enabled to count */
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- val = inb (TCO1_CNT + 1);
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- val &= 0xf7;
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- outb (val, TCO1_CNT + 1);
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- val = inb (TCO1_CNT + 1);
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-
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- spin_unlock(&tco_lock);
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-
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- if (val & 0x08)
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- return -1;
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- return 0;
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-}
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-
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-static int tco_timer_stop (void)
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-{
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- unsigned char val, val1;
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-
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- spin_lock(&tco_lock);
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- /* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
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- val = inb (TCO1_CNT + 1);
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- val |= 0x08;
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- outb (val, TCO1_CNT + 1);
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- val = inb (TCO1_CNT + 1);
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-
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- /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
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- pci_read_config_byte (i8xx_tco_pci, 0xd4, &val1);
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- val1 |= 0x02;
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- pci_write_config_byte (i8xx_tco_pci, 0xd4, val1);
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-
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- spin_unlock(&tco_lock);
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-
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- if ((val & 0x08) == 0)
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- return -1;
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- return 0;
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-}
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-
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-static int tco_timer_keepalive (void)
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-{
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- spin_lock(&tco_lock);
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- /* Reload the timer by writing to the TCO Timer Reload register */
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- outb (0x01, TCO1_RLD);
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- spin_unlock(&tco_lock);
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- return 0;
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-}
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-
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-static int tco_timer_set_heartbeat (int t)
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-{
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- unsigned char val;
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- unsigned char tmrval;
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-
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- tmrval = seconds_to_ticks(t);
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- /* from the specs: */
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- /* "Values of 0h-3h are ignored and should not be attempted" */
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- if (tmrval > 0x3f || tmrval < 0x04)
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- return -EINVAL;
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-
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- /* Write new heartbeat to watchdog */
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- spin_lock(&tco_lock);
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- val = inb (TCO1_TMR);
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- val &= 0xc0;
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- val |= tmrval;
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- outb (val, TCO1_TMR);
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- val = inb (TCO1_TMR);
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- spin_unlock(&tco_lock);
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-
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- if ((val & 0x3f) != tmrval)
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- return -EINVAL;
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-
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- heartbeat = t;
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- return 0;
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-}
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-
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-static int tco_timer_get_timeleft (int *time_left)
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-{
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- unsigned char val;
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-
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- spin_lock(&tco_lock);
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-
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- /* read the TCO Timer */
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- val = inb (TCO1_RLD);
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- val &= 0x3f;
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-
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- spin_unlock(&tco_lock);
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-
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- *time_left = (int)((val * 6) / 10);
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-
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- return 0;
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-}
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-
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-/*
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- * /dev/watchdog handling
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- */
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-
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-static int i8xx_tco_open (struct inode *inode, struct file *file)
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-{
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- /* /dev/watchdog can only be opened once */
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- if (test_and_set_bit(0, &timer_alive))
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- return -EBUSY;
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-
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- /*
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- * Reload and activate timer
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- */
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- tco_timer_keepalive ();
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- tco_timer_start ();
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- return nonseekable_open(inode, file);
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-}
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-
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-static int i8xx_tco_release (struct inode *inode, struct file *file)
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-{
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- /*
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- * Shut off the timer.
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- */
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- if (tco_expect_close == 42) {
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- tco_timer_stop ();
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- } else {
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- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
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- tco_timer_keepalive ();
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- }
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- clear_bit(0, &timer_alive);
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- tco_expect_close = 0;
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- return 0;
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-}
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-
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-static ssize_t i8xx_tco_write (struct file *file, const char __user *data,
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- size_t len, loff_t * ppos)
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-{
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- /* See if we got the magic character 'V' and reload the timer */
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- if (len) {
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- if (!nowayout) {
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- size_t i;
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-
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- /* note: just in case someone wrote the magic character
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- * five months ago... */
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- tco_expect_close = 0;
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-
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- /* scan to see whether or not we got the magic character */
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- for (i = 0; i != len; i++) {
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- char c;
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- if(get_user(c, data+i))
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- return -EFAULT;
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- if (c == 'V')
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- tco_expect_close = 42;
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- }
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- }
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-
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- /* someone wrote to us, we should reload the timer */
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- tco_timer_keepalive ();
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- }
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- return len;
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-}
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-
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-static int i8xx_tco_ioctl (struct inode *inode, struct file *file,
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- unsigned int cmd, unsigned long arg)
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-{
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- int new_options, retval = -EINVAL;
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- int new_heartbeat;
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- int time_left;
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- void __user *argp = (void __user *)arg;
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- int __user *p = argp;
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- static struct watchdog_info ident = {
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- .options = WDIOF_SETTIMEOUT |
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- WDIOF_KEEPALIVEPING |
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- WDIOF_MAGICCLOSE,
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- .firmware_version = 0,
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- .identity = TCO_MODULE_NAME,
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- };
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-
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- switch (cmd) {
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- case WDIOC_GETSUPPORT:
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- return copy_to_user(argp, &ident,
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- sizeof (ident)) ? -EFAULT : 0;
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-
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- case WDIOC_GETSTATUS:
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- case WDIOC_GETBOOTSTATUS:
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- return put_user (0, p);
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-
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- case WDIOC_KEEPALIVE:
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- tco_timer_keepalive ();
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- return 0;
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-
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- case WDIOC_SETOPTIONS:
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- {
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- if (get_user (new_options, p))
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- return -EFAULT;
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-
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- if (new_options & WDIOS_DISABLECARD) {
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- tco_timer_stop ();
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- retval = 0;
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- }
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-
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- if (new_options & WDIOS_ENABLECARD) {
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- tco_timer_keepalive ();
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- tco_timer_start ();
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- retval = 0;
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- }
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-
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- return retval;
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- }
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-
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- case WDIOC_SETTIMEOUT:
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- {
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- if (get_user(new_heartbeat, p))
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- return -EFAULT;
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-
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- if (tco_timer_set_heartbeat(new_heartbeat))
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- return -EINVAL;
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-
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- tco_timer_keepalive ();
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- /* Fall */
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- }
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-
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- case WDIOC_GETTIMEOUT:
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- return put_user(heartbeat, p);
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-
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- case WDIOC_GETTIMELEFT:
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- {
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- if (tco_timer_get_timeleft(&time_left))
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- return -EINVAL;
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-
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- return put_user(time_left, p);
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- }
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-
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- default:
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- return -ENOTTY;
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- }
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-}
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-
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-/*
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- * Notify system
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- */
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-
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-static int i8xx_tco_notify_sys (struct notifier_block *this, unsigned long code, void *unused)
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-{
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- if (code==SYS_DOWN || code==SYS_HALT) {
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- /* Turn the WDT off */
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- tco_timer_stop ();
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- }
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-
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- return NOTIFY_DONE;
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-}
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-
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-/*
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- * Kernel Interfaces
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- */
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-
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-static const struct file_operations i8xx_tco_fops = {
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- .owner = THIS_MODULE,
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- .llseek = no_llseek,
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- .write = i8xx_tco_write,
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- .ioctl = i8xx_tco_ioctl,
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- .open = i8xx_tco_open,
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- .release = i8xx_tco_release,
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-};
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-
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-static struct miscdevice i8xx_tco_miscdev = {
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- .minor = WATCHDOG_MINOR,
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- .name = "watchdog",
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- .fops = &i8xx_tco_fops,
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-};
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-
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-static struct notifier_block i8xx_tco_notifier = {
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- .notifier_call = i8xx_tco_notify_sys,
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-};
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-
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-/*
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- * Data for PCI driver interface
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- *
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- * This data only exists for exporting the supported
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- * PCI ids via MODULE_DEVICE_TABLE. We do not actually
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- * register a pci_driver, because someone else might one day
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- * want to register another driver on the same PCI id.
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- */
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-static struct pci_device_id i8xx_tco_pci_tbl[] = {
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801E_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0) },
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- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1) },
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- { }, /* End of list */
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-};
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-MODULE_DEVICE_TABLE (pci, i8xx_tco_pci_tbl);
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-
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-/*
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- * Init & exit routines
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- */
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-
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-static unsigned char __init i8xx_tco_getdevice (void)
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-{
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- struct pci_dev *dev = NULL;
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- u8 val1, val2;
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- u16 badr;
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- /*
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- * Find the PCI device
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- */
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-
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- for_each_pci_dev(dev)
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- if (pci_match_id(i8xx_tco_pci_tbl, dev)) {
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- i8xx_tco_pci = dev;
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- break;
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- }
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-
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- if (i8xx_tco_pci) {
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- /*
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- * Find the ACPI base I/O address which is the base
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- * for the TCO registers (TCOBASE=ACPIBASE + 0x60)
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- * ACPIBASE is bits [15:7] from 0x40-0x43
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- */
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- pci_read_config_byte (i8xx_tco_pci, 0x40, &val1);
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- pci_read_config_byte (i8xx_tco_pci, 0x41, &val2);
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- badr = ((val2 << 1) | (val1 >> 7)) << 7;
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- ACPIBASE = badr;
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- /* Something's wrong here, ACPIBASE has to be set */
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- if (badr == 0x0001 || badr == 0x0000) {
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- printk (KERN_ERR PFX "failed to get TCOBASE address\n");
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- pci_dev_put(i8xx_tco_pci);
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- return 0;
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- }
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-
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- /* Check chipset's NO_REBOOT bit */
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- pci_read_config_byte (i8xx_tco_pci, 0xd4, &val1);
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- if (val1 & 0x02) {
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- val1 &= 0xfd;
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- pci_write_config_byte (i8xx_tco_pci, 0xd4, val1);
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- pci_read_config_byte (i8xx_tco_pci, 0xd4, &val1);
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- if (val1 & 0x02) {
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- printk (KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
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- pci_dev_put(i8xx_tco_pci);
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- return 0; /* Cannot reset NO_REBOOT bit */
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- }
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- }
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- /* Disable reboots untill the watchdog starts */
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- val1 |= 0x02;
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- pci_write_config_byte (i8xx_tco_pci, 0xd4, val1);
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-
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- /* Set the TCO_EN bit in SMI_EN register */
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- if (!request_region (SMI_EN + 1, 1, "i8xx TCO")) {
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- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
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- SMI_EN + 1);
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- pci_dev_put(i8xx_tco_pci);
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- return 0;
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- }
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- val1 = inb (SMI_EN + 1);
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- val1 &= 0xdf;
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- outb (val1, SMI_EN + 1);
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- release_region (SMI_EN + 1, 1);
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- return 1;
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- }
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- return 0;
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-}
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-
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-static int __init watchdog_init (void)
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-{
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- int ret;
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-
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- spin_lock_init(&tco_lock);
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-
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- /* Check whether or not the hardware watchdog is there */
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- if (!i8xx_tco_getdevice () || i8xx_tco_pci == NULL)
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- return -ENODEV;
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-
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- if (!request_region (TCOBASE, 0x10, "i8xx TCO")) {
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- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
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- TCOBASE);
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- ret = -EIO;
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- goto out;
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- }
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-
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- /* Clear out the (probably old) status */
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- outb (0, TCO1_STS);
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- outb (3, TCO2_STS);
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-
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- /* Check that the heartbeat value is within it's range ; if not reset to the default */
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- if (tco_timer_set_heartbeat (heartbeat)) {
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- heartbeat = WATCHDOG_HEARTBEAT;
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- tco_timer_set_heartbeat (heartbeat);
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- printk(KERN_INFO PFX "heartbeat value must be 2<heartbeat<39, using %d\n",
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- heartbeat);
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- }
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-
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- ret = register_reboot_notifier(&i8xx_tco_notifier);
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- if (ret != 0) {
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- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
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- ret);
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- goto unreg_region;
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- }
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-
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- ret = misc_register(&i8xx_tco_miscdev);
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- if (ret != 0) {
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- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
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- WATCHDOG_MINOR, ret);
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- goto unreg_notifier;
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- }
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-
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- tco_timer_stop ();
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-
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- printk (KERN_INFO PFX "initialized (0x%04x). heartbeat=%d sec (nowayout=%d)\n",
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- TCOBASE, heartbeat, nowayout);
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-
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- return 0;
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-
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-unreg_notifier:
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- unregister_reboot_notifier(&i8xx_tco_notifier);
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-unreg_region:
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- release_region (TCOBASE, 0x10);
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-out:
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- pci_dev_put(i8xx_tco_pci);
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- return ret;
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-}
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-
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-static void __exit watchdog_cleanup (void)
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-{
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- /* Stop the timer before we leave */
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- if (!nowayout)
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- tco_timer_stop ();
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-
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- /* Deregister */
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- misc_deregister (&i8xx_tco_miscdev);
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- unregister_reboot_notifier(&i8xx_tco_notifier);
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- release_region (TCOBASE, 0x10);
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-
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- pci_dev_put(i8xx_tco_pci);
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-}
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-
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-module_init(watchdog_init);
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-module_exit(watchdog_cleanup);
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-
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-MODULE_AUTHOR("Nils Faerber");
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-MODULE_DESCRIPTION("TCO timer driver for i8xx chipsets");
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-MODULE_LICENSE("GPL");
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-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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Adrian Bunk