Commit 6d03a68e authored by Linus Torvalds's avatar Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: (33 commits)
  [WATCHDOG] remove experimental on iTCO_wdt.c
  [WATCHDOG] Atmel AT91RM9200 rename.
  [WATCHDOG] includes for sample watchdog program.
  [WATCHDOG] watchdog/iTCO_wdt: fix bug related to gcc uninit warning
  [WATCHDOG] add ich8 support to iTCO_wdt.c (patch 2)
  [WATCHDOG] add ich8 support to iTCO_wdt.c
  [WATCHDOG] ioremap balanced with iounmap for drivers/char/watchdog/s3c2410_wdt.c
  [WATCHDOG] w83697hf/hg WDT driver - Kconfig patch
  [WATCHDOG] w83697hf/hg WDT driver - autodetect patch
  [WATCHDOG] w83697hf/hg WDT driver - patch 16
  [WATCHDOG] w83697hf/hg WDT driver - patch 15
  [WATCHDOG] w83697hf/hg WDT driver - patch 14
  [WATCHDOG] w83697hf/hg WDT driver - patch 13
  [WATCHDOG] w83697hf/hg WDT driver - patch 12
  [WATCHDOG] w83697hf/hg WDT driver - patch 11
  [WATCHDOG] w83697hf/hg WDT driver - patch 10
  [WATCHDOG] w83697hf/hg WDT driver - patch 9
  [WATCHDOG] w83697hf/hg WDT driver - patch 8
  [WATCHDOG] w83697hf/hg WDT driver - patch 7
  [WATCHDOG] w83697hf/hg WDT driver - patch 6
  ...
parents 0c0e4668 cbf40d3f
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int main(int argc, const char *argv[]) {
......
......@@ -577,7 +577,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_AT91_WATCHDOG=y
CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
......
......@@ -558,7 +558,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_AT91_WATCHDOG=y
CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
......
......@@ -615,7 +615,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_AT91_WATCHDOG=y
CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
......
......@@ -615,7 +615,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_AT91_WATCHDOG=y
CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
......
......@@ -560,7 +560,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_AT91_WATCHDOG=y
CONFIG_AT91RM9200_WATCHDOG=y
# CONFIG_NVRAM is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
......
......@@ -607,7 +607,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_AT91_WATCHDOG=y
CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
......
......@@ -13,7 +13,7 @@ config WATCHDOG
subsequently opening the file and then failing to write to it for
longer than 1 minute will result in rebooting the machine. This
could be useful for a networked machine that needs to come back
online as fast as possible after a lock-up. There's both a watchdog
on-line as fast as possible after a lock-up. There's both a watchdog
implementation entirely in software (which can sometimes fail to
reboot the machine) and a driver for hardware watchdog boards, which
are more robust and can also keep track of the temperature inside
......@@ -60,7 +60,7 @@ config SOFT_WATCHDOG
# ARM Architecture
config AT91_WATCHDOG
config AT91RM9200_WATCHDOG
tristate "AT91RM9200 watchdog"
depends on WATCHDOG && ARCH_AT91RM9200
help
......@@ -71,7 +71,7 @@ config 21285_WATCHDOG
tristate "DC21285 watchdog"
depends on WATCHDOG && FOOTBRIDGE
help
The Intel Footbridge chip contains a builtin watchdog circuit. Say Y
The Intel Footbridge chip contains a built-in watchdog circuit. Say Y
here if you wish to use this. Alternatively say M to compile the
driver as a module, which will be called wdt285.
......@@ -273,7 +273,7 @@ config IBMASR
depends on WATCHDOG && X86
help
This is the driver for the IBM Automatic Server Restart watchdog
timer builtin into some eServer xSeries machines.
timer built-in into some eServer xSeries machines.
To compile this driver as a module, choose M here: the
module will be called ibmasr.
......@@ -316,13 +316,16 @@ config I8XX_TCO
To compile this driver as a module, choose M here: the
module will be called i8xx_tco.
Note: This driver will be removed in the near future. Please
use the Intel TCO Timer/Watchdog driver.
config ITCO_WDT
tristate "Intel TCO Timer/Watchdog (EXPERIMENTAL)"
depends on WATCHDOG && (X86 || IA64) && PCI && EXPERIMENTAL
tristate "Intel TCO Timer/Watchdog"
depends on WATCHDOG && (X86 || IA64) && PCI
---help---
Hardware driver for the intel TCO timer based watchdog devices.
These drivers are included in the Intel 82801 I/O Controller
Hub family 'from ICH0 up to ICH7) and in the Intel 6300ESB
Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
controller hub.
The TCO (Total Cost of Ownership) timer is a watchdog timer
......@@ -395,6 +398,26 @@ config CPU5_WDT
To compile this driver as a module, choose M here: the
module will be called cpu5wdt.
config SMSC37B787_WDT
tristate "Winbond SMsC37B787 Watchdog Timer"
depends on WATCHDOG && X86
---help---
This is the driver for the hardware watchdog component on the
Winbond SMsC37B787 chipset as used on the NetRunner Mainboard
from Vision Systems and maybe others.
This watchdog simply watches your kernel to make sure it doesn't
freeze, and if it does, it reboots your computer after a certain
amount of time.
Usually a userspace daemon will notify the kernel WDT driver that
userspace is still alive, at regular intervals.
To compile this driver as a module, choose M here: the
module will be called smsc37b787_wdt.
Most people will say N.
config W83627HF_WDT
tristate "W83627HF Watchdog Timer"
depends on WATCHDOG && X86
......@@ -410,6 +433,21 @@ config W83627HF_WDT
Most people will say N.
config W83697HF_WDT
tristate "W83697HF/W83697HG Watchdog Timer"
depends on WATCHDOG && X86
---help---
This is the driver for the hardware watchdog on the W83697HF/HG
chipset as used in Dedibox/VIA motherboards (and likely others).
This watchdog simply watches your kernel to make sure it doesn't
freeze, and if it does, it reboots your computer after a certain
amount of time.
To compile this driver as a module, choose M here: the
module will be called w83697hf_wdt.
Most people will say N.
config W83877F_WDT
tristate "W83877F (EMACS) Watchdog Timer"
depends on WATCHDOG && X86
......@@ -443,7 +481,7 @@ config MACHZ_WDT
depends on WATCHDOG && X86
---help---
If you are using a ZF Micro MachZ processor, say Y here, otherwise
N. This is the driver for the watchdog timer builtin on that
N. This is the driver for the watchdog timer built-in on that
processor using ZF-Logic interface. This watchdog simply watches
your kernel to make sure it doesn't freeze, and if it does, it
reboots your computer after a certain amount of time.
......@@ -472,7 +510,6 @@ config SBC_EPX_C3_WATCHDOG
To compile this driver as a module, choose M here: the
module will be called sbc_epx_c3.
# PowerPC Architecture
config 8xx_WDT
......@@ -556,7 +593,7 @@ config SH_WDT_MMAP
help
If you say Y here, user applications will be able to mmap the
WDT/CPG registers.
#
# SPARC64 Architecture
config WATCHDOG_CP1XXX
......
......@@ -23,7 +23,7 @@ obj-$(CONFIG_WDTPCI) += wdt_pci.o
obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
# ARM Architecture
obj-$(CONFIG_AT91_WATCHDOG) += at91_wdt.o
obj-$(CONFIG_AT91RM9200_WATCHDOG) += at91rm9200_wdt.o
obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
......@@ -53,7 +53,9 @@ obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
obj-$(CONFIG_W83697HF_WDT) += w83697hf_wdt.o
obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
obj-$(CONFIG_MACHZ_WDT) += machzwd.o
......
......@@ -35,6 +35,10 @@
* 82801GDH (ICH7DH) : document number 307013-002, 307014-009,
* 82801GBM (ICH7-M) : document number 307013-002, 307014-009,
* 82801GHM (ICH7-M DH) : document number 307013-002, 307014-009,
* 82801HB (ICH8) : document number 313056-002, 313057-004,
* 82801HR (ICH8R) : document number 313056-002, 313057-004,
* 82801HH (ICH8DH) : document number 313056-002, 313057-004,
* 82801HO (ICH8DO) : document number 313056-002, 313057-004,
* 6300ESB (6300ESB) : document number 300641-003
*/
......@@ -45,7 +49,7 @@
/* Module and version information */
#define DRV_NAME "iTCO_wdt"
#define DRV_VERSION "1.00"
#define DRV_RELDATE "30-Jul-2006"
#define DRV_RELDATE "08-Oct-2006"
#define PFX DRV_NAME ": "
/* Includes */
......@@ -85,6 +89,9 @@ enum iTCO_chipsets {
TCO_ICH7, /* ICH7 & ICH7R */
TCO_ICH7M, /* ICH7-M */
TCO_ICH7MDH, /* ICH7-M DH */
TCO_ICH8, /* ICH8 & ICH8R */
TCO_ICH8DH, /* ICH8DH */
TCO_ICH8DO, /* ICH8DO */
};
static struct {
......@@ -108,6 +115,9 @@ static struct {
{"ICH7 or ICH7R", 2},
{"ICH7-M", 2},
{"ICH7-M DH", 2},
{"ICH8 or ICH8R", 2},
{"ICH8DH", 2},
{"ICH8DO", 2},
{NULL,0}
};
......@@ -135,6 +145,9 @@ static struct pci_device_id iTCO_wdt_pci_tbl[] = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7 },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7M },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7MDH },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8 },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DH },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DO },
{ 0, }, /* End of list */
};
MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl);
......@@ -355,7 +368,8 @@ static int iTCO_wdt_get_timeleft (int *time_left)
spin_unlock(&iTCO_wdt_private.io_lock);
*time_left = (val8 * 6) / 10;
}
} else
return -EINVAL;
return 0;
}
......@@ -426,7 +440,6 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
{
int new_options, retval = -EINVAL;
int new_heartbeat;
int time_left;
void __user *argp = (void __user *)arg;
int __user *p = argp;
static struct watchdog_info ident = {
......@@ -486,6 +499,8 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
case WDIOC_GETTIMELEFT:
{
int time_left;
if (iTCO_wdt_get_timeleft(&time_left))
return -EINVAL;
......
......@@ -380,18 +380,21 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
printk(KERN_INFO PFX "failed to get irq resource\n");
iounmap(wdt_base);
return -ENOENT;
}
ret = request_irq(res->start, s3c2410wdt_irq, 0, pdev->name, pdev);
if (ret != 0) {
printk(KERN_INFO PFX "failed to install irq (%d)\n", ret);
iounmap(wdt_base);
return ret;
}
wdt_clock = clk_get(&pdev->dev, "watchdog");
if (wdt_clock == NULL) {
printk(KERN_INFO PFX "failed to find watchdog clock source\n");
iounmap(wdt_base);
return -ENOENT;
}
......@@ -415,6 +418,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
if (ret) {
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (%d)\n",
WATCHDOG_MINOR, ret);
iounmap(wdt_base);
return ret;
}
......@@ -451,6 +455,7 @@ static int s3c2410wdt_remove(struct platform_device *dev)
wdt_clock = NULL;
}
iounmap(wdt_base);
misc_deregister(&s3c2410wdt_miscdev);
return 0;
}
......
This diff is collapsed.
......@@ -33,6 +33,7 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/uaccess.h>
......@@ -44,6 +45,7 @@
static unsigned long wdt_is_open;
static char expect_close;
static spinlock_t io_lock;
/* You must set this - there is no sane way to probe for this board. */
static int wdt_io = 0x2E;
......@@ -110,12 +112,16 @@ w83627hf_init(void)
static void
wdt_ctrl(int timeout)
{
spin_lock(&io_lock);
w83627hf_select_wd_register();
outb_p(0xF6, WDT_EFER); /* Select CRF6 */
outb_p(timeout, WDT_EFDR); /* Write Timeout counter to CRF6 */
w83627hf_unselect_wd_register();
spin_unlock(&io_lock);
}
static int
......@@ -303,6 +309,8 @@ wdt_init(void)
{
int ret;
spin_lock_init(&io_lock);
printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF Super I/O chip initialising.\n");
if (wdt_set_heartbeat(timeout)) {
......
/*
* w83697hf/hg WDT driver
*
* (c) Copyright 2006 Samuel Tardieu <sam@rfc1149.net>
* (c) Copyright 2006 Marcus Junker <junker@anduras.de>
*
* Based on w83627hf_wdt.c which is based on advantechwdt.c
* which is based on wdt.c.
* Original copyright messages:
*
* (c) Copyright 2003 Pdraig Brady <P@draigBrady.com>
*
* (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
*
* (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 Marcus Junker nor ANDURAS AG admit liability nor provide
* warranty for any of this software. This material is provided
* "AS-IS" and at no charge.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/fs.h>
#include <linux/ioport.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#define WATCHDOG_NAME "w83697hf/hg WDT"
#define PFX WATCHDOG_NAME ": "
#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
static unsigned long wdt_is_open;
static char expect_close;
static spinlock_t io_lock;
/* You must set this - there is no sane way to probe for this board. */
static int wdt_io = 0x2e;
module_param(wdt_io, int, 0);
MODULE_PARM_DESC(wdt_io, "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)");
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
/*
* Kernel methods.
*/
#define W83697HF_EFER (wdt_io+0) /* Extended Function Enable Register */
#define W83697HF_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
#define W83697HF_EFDR (wdt_io+1) /* Extended Function Data Register */
static inline void
w83697hf_unlock(void)
{
outb_p(0x87, W83697HF_EFER); /* Enter extended function mode */
outb_p(0x87, W83697HF_EFER); /* Again according to manual */
}
static inline void
w83697hf_lock(void)
{
outb_p(0xAA, W83697HF_EFER); /* Leave extended function mode */
}
/*
* The three functions w83697hf_get_reg(), w83697hf_set_reg() and
* w83697hf_write_timeout() must be called with the device unlocked.
*/
static unsigned char
w83697hf_get_reg(unsigned char reg)
{
outb_p(reg, W83697HF_EFIR);
return inb_p(W83697HF_EFDR);
}
static void
w83697hf_set_reg(unsigned char reg, unsigned char data)
{
outb_p(reg, W83697HF_EFIR);
outb_p(data, W83697HF_EFDR);
}
static void
w83697hf_write_timeout(int timeout)
{
w83697hf_set_reg(0xF4, timeout); /* Write Timeout counter to CRF4 */
}
static void
w83697hf_select_wdt(void)
{
w83697hf_unlock();
w83697hf_set_reg(0x07, 0x08); /* Switch to logic device 8 (GPIO2) */
}
static inline void
w83697hf_deselect_wdt(void)
{
w83697hf_lock();
}
static void
w83697hf_init(void)
{
unsigned char bbuf;
w83697hf_select_wdt();
bbuf = w83697hf_get_reg(0x29);
bbuf &= ~0x60;
bbuf |= 0x20;
w83697hf_set_reg(0x29, bbuf); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
bbuf = w83697hf_get_reg(0xF3);
bbuf &= ~0x04;
w83697hf_set_reg(0xF3, bbuf); /* Count mode is seconds */
w83697hf_deselect_wdt();
}
static int
wdt_ping(void)
{
spin_lock(&io_lock);
w83697hf_select_wdt();
w83697hf_write_timeout(timeout);
w83697hf_deselect_wdt();
spin_unlock(&io_lock);
return 0;
}
static int
wdt_enable(void)
{
spin_lock(&io_lock);
w83697hf_select_wdt();
w83697hf_write_timeout(timeout);
w83697hf_set_reg(0x30, 1); /* Enable timer */
w83697hf_deselect_wdt();
spin_unlock(&io_lock);
return 0;
}
static int
wdt_disable(void)
{
spin_lock(&io_lock);
w83697hf_select_wdt();
w83697hf_set_reg(0x30, 0); /* Disable timer */
w83697hf_write_timeout(0);
w83697hf_deselect_wdt();
spin_unlock(&io_lock);
return 0;
}
static int
wdt_set_heartbeat(int t)
{
if ((t < 1) || (t > 255))
return -EINVAL;
timeout = t;
return 0;
}
static ssize_t
wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
size_t i;
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;
}
}
wdt_ping();
}
return count;
}
static int
wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_timeout;
static struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "W83697HF 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_KEEPALIVE:
wdt_ping();
break;
case WDIOC_SETTIMEOUT:
if (get_user(new_timeout, p))
return -EFAULT;
if (wdt_set_heartbeat(new_timeout))
return -EINVAL;
wdt_ping();
/* Fall */
case WDIOC_GETTIMEOUT:
return put_user(timeout, p);
case WDIOC_SETOPTIONS:
{
int options, retval = -EINVAL;
if (get_user(options, p))
return -EFAULT;
if (options & WDIOS_DISABLECARD) {
wdt_disable();
retval = 0;
}
if (options & WDIOS_ENABLECARD) {
wdt_enable();
retval = 0;
}
return retval;
}
default:
return -ENOTTY;
}
return 0;
}
static int
wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
/*
* Activate
*/
wdt_enable();
return nonseekable_open(inode, file);
}
static int
wdt_close(struct inode *inode, struct file *file)
{
if (expect_close == 42) {
wdt_disable();
} else {
printk (KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
wdt_ping();
}
expect_close = 0;
clear_bit(0, &wdt_is_open);
return 0;
}
/*
* Notifier for system down
*/
static int
wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT) {
/* Turn the WDT off */
wdt_disable();
}
return NOTIFY_DONE;
}
/*
* Kernel Interfaces
*/
static struct file_operations wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
.ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_close,
};
static struct miscdevice wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &wdt_fops,
};
/*
* The WDT needs to learn about soft shutdowns in order to
* turn the timebomb registers off.
*/
static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
static int
w83697hf_check_wdt(void)
{
if (!request_region(wdt_io, 2, WATCHDOG_NAME)) {
printk (KERN_ERR PFX "I/O address 0x%x already in use\n", wdt_io);
return -EIO;
}
printk (KERN_DEBUG PFX "Looking for watchdog at address 0x%x\n", wdt_io);
w83697hf_unlock();
if (w83697hf_get_reg(0x20) == 0x60) {
printk (KERN_INFO PFX "watchdog found at address 0x%x\n", wdt_io);
w83697hf_lock();
return 0;
}
w83697hf_lock(); /* Reprotect in case it was a compatible device */
printk (KERN_INFO PFX "watchdog not found at address 0x%x\n", wdt_io);
release_region(wdt_io, 2);
return -EIO;
}
static int w83697hf_ioports[] = { 0x2e, 0x4e, 0x00 };
static int __init
wdt_init(void)
{
int ret, i, found = 0;
spin_lock_init(&io_lock);
printk (KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n");
if (wdt_io == 0) {
/* we will autodetect the W83697HF/HG watchdog */
for (i = 0; ((!found) && (w83697hf_ioports[i] != 0)); i++) {
wdt_io = w83697hf_ioports[i];
if (!w83697hf_check_wdt())
found++;
}
} else {
if (!w83697hf_check_wdt())
found++;
}
if (!found) {
printk (KERN_ERR PFX "No W83697HF/HG could be found\n");
ret = -EIO;
goto out;
}
w83697hf_init();
wdt_disable(); /* Disable watchdog until first use */
if (wdt_set_heartbeat(timeout)) {
wdt_set_heartbeat(WATCHDOG_TIMEOUT);
printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
WATCHDOG_TIMEOUT);
}
ret = register_reboot_notifier(&wdt_notifier);
if (ret != 0) {
printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
ret);
goto unreg_regions;
}
ret = misc_register(&wdt_miscdev);
if (ret != 0) {
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
goto unreg_reboot;
}
printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
out:
return ret;
unreg_reboot:
unregister_reboot_notifier(&wdt_notifier);
unreg_regions:
release_region(wdt_io, 2);
goto out;
}
static void __exit
wdt_exit(void)
{
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
release_region(wdt_io, 2);
}
module_init(wdt_init);
module_exit(wdt_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marcus Junker <junker@anduras.de>, Samuel Tardieu <sam@rfc1149.net>");
MODULE_DESCRIPTION("w83697hf/hg WDT driver");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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