* 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
...
+#include <stdio.h>
#include <stdlib.h>
+#include <unistd.h>
#include <fcntl.h>
int main(int argc, const char *argv[]) {
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
-CONFIG_AT91_WATCHDOG=y
+CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
-CONFIG_AT91_WATCHDOG=y
+CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
-CONFIG_AT91_WATCHDOG=y
+CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
-CONFIG_AT91_WATCHDOG=y
+CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
# 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
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
-CONFIG_AT91_WATCHDOG=y
+CONFIG_AT91RM9200_WATCHDOG=y
#
# USB-based Watchdog Cards
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
# ARM Architecture
-config AT91_WATCHDOG
+config AT91RM9200_WATCHDOG
tristate "AT91RM9200 watchdog"
depends on WATCHDOG && ARCH_AT91RM9200
help
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.
Most people will say N.
config IBMASR
- tristate "IBM Automatic Server Restart"
- depends on WATCHDOG && X86
- help
+ tristate "IBM Automatic Server Restart"
+ 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.
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
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
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
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.
To compile this driver as a module, choose M here: the
module will be called sbc_epx_c3.
-
# PowerPC Architecture
config 8xx_WDT
help
This driver adds watchdog support for the RTAS watchdog.
- To compile this driver as a module, choose M here. The module
+ To compile this driver as a module, choose M here. The module
will be called wdrtas.
# MIPS Architecture
help
If you say Y here, user applications will be able to mmap the
WDT/CPG registers.
-#
+
# SPARC64 Architecture
config WATCHDOG_CP1XXX
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
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
+++ /dev/null
-/*
- * Watchdog driver for Atmel AT91RM9200 (Thunder)
- *
- * Copyright (C) 2003 SAN People (Pty) Ltd
- *
- * 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.
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <asm/bitops.h>
-#include <asm/uaccess.h>
-
-
-#define WDT_DEFAULT_TIME 5 /* seconds */
-#define WDT_MAX_TIME 256 /* seconds */
-
-static int wdt_time = WDT_DEFAULT_TIME;
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(wdt_time, int, 0);
-MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
-
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-#endif
-
-
-static unsigned long at91wdt_busy;
-
-/* ......................................................................... */
-
-/*
- * Disable the watchdog.
- */
-static void inline at91_wdt_stop(void)
-{
- at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN);
-}
-
-/*
- * Enable and reset the watchdog.
- */
-static void inline at91_wdt_start(void)
-{
- at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN | (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
- at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
-}
-
-/*
- * Reload the watchdog timer. (ie, pat the watchdog)
- */
-static void inline at91_wdt_reload(void)
-{
- at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
-}
-
-/* ......................................................................... */
-
-/*
- * Watchdog device is opened, and watchdog starts running.
- */
-static int at91_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &at91wdt_busy))
- return -EBUSY;
-
- at91_wdt_start();
- return nonseekable_open(inode, file);
-}
-
-/*
- * Close the watchdog device.
- * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
- * disabled.
- */
-static int at91_wdt_close(struct inode *inode, struct file *file)
-{
- if (!nowayout)
- at91_wdt_stop(); /* Disable the watchdog when file is closed */
-
- clear_bit(0, &at91wdt_busy);
- return 0;
-}
-
-/*
- * Change the watchdog time interval.
- */
-static int at91_wdt_settimeout(int new_time)
-{
- /*
- * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
- *
- * Since WDV is a 16-bit counter, the maximum period is
- * 65536 / 0.256 = 256 seconds.
- */
- if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
- return -EINVAL;
-
- /* Set new watchdog time. It will be used when at91_wdt_start() is called. */
- wdt_time = new_time;
- return 0;
-}
-
-static struct watchdog_info at91_wdt_info = {
- .identity = "at91 watchdog",
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
-};
-
-/*
- * Handle commands from user-space.
- */
-static int at91_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_value;
-
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- at91_wdt_reload(); /* pat the watchdog */
- return 0;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &at91_wdt_info, sizeof(at91_wdt_info)) ? -EFAULT : 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (at91_wdt_settimeout(new_value))
- return -EINVAL;
-
- /* Enable new time value */
- at91_wdt_start();
-
- /* Return current value */
- return put_user(wdt_time, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(wdt_time, p);
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_SETOPTIONS:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (new_value & WDIOS_DISABLECARD)
- at91_wdt_stop();
- if (new_value & WDIOS_ENABLECARD)
- at91_wdt_start();
- return 0;
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * Pat the watchdog whenever device is written to.
- */
-static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- at91_wdt_reload(); /* pat the watchdog */
- return len;
-}
-
-/* ......................................................................... */
-
-static const struct file_operations at91wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = at91_wdt_ioctl,
- .open = at91_wdt_open,
- .release = at91_wdt_close,
- .write = at91_wdt_write,
-};
-
-static struct miscdevice at91wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &at91wdt_fops,
-};
-
-static int __init at91wdt_probe(struct platform_device *pdev)
-{
- int res;
-
- if (at91wdt_miscdev.dev)
- return -EBUSY;
- at91wdt_miscdev.dev = &pdev->dev;
-
- res = misc_register(&at91wdt_miscdev);
- if (res)
- return res;
-
- printk("AT91 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
- return 0;
-}
-
-static int __exit at91wdt_remove(struct platform_device *pdev)
-{
- int res;
-
- res = misc_deregister(&at91wdt_miscdev);
- if (!res)
- at91wdt_miscdev.dev = NULL;
-
- return res;
-}
-
-static void at91wdt_shutdown(struct platform_device *pdev)
-{
- at91_wdt_stop();
-}
-
-#ifdef CONFIG_PM
-
-static int at91wdt_suspend(struct platform_device *pdev, pm_message_t message)
-{
- at91_wdt_stop();
- return 0;
-}
-
-static int at91wdt_resume(struct platform_device *pdev)
-{
- if (at91wdt_busy)
- at91_wdt_start();
- return 0;
-}
-
-#else
-#define at91wdt_suspend NULL
-#define at91wdt_resume NULL
-#endif
-
-static struct platform_driver at91wdt_driver = {
- .probe = at91wdt_probe,
- .remove = __exit_p(at91wdt_remove),
- .shutdown = at91wdt_shutdown,
- .suspend = at91wdt_suspend,
- .resume = at91wdt_resume,
- .driver = {
- .name = "at91_wdt",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init at91_wdt_init(void)
-{
- /* Check that the heartbeat value is within range; if not reset to the default */
- if (at91_wdt_settimeout(wdt_time)) {
- at91_wdt_settimeout(WDT_DEFAULT_TIME);
- pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time);
- }
-
- return platform_driver_register(&at91wdt_driver);
-}
-
-static void __exit at91_wdt_exit(void)
-{
- platform_driver_unregister(&at91wdt_driver);
-}
-
-module_init(at91_wdt_init);
-module_exit(at91_wdt_exit);
-
-MODULE_AUTHOR("Andrew Victor");
-MODULE_DESCRIPTION("Watchdog driver for Atmel AT91RM9200");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog driver for Atmel AT91RM9200 (Thunder)
+ *
+ * Copyright (C) 2003 SAN People (Pty) Ltd
+ *
+ * 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.
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <asm/bitops.h>
+#include <asm/uaccess.h>
+
+
+#define WDT_DEFAULT_TIME 5 /* seconds */
+#define WDT_MAX_TIME 256 /* seconds */
+
+static int wdt_time = WDT_DEFAULT_TIME;
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+module_param(wdt_time, int, 0);
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
+
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+#endif
+
+
+static unsigned long at91wdt_busy;
+
+/* ......................................................................... */
+
+/*
+ * Disable the watchdog.
+ */
+static void inline at91_wdt_stop(void)
+{
+ at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN);
+}
+
+/*
+ * Enable and reset the watchdog.
+ */
+static void inline at91_wdt_start(void)
+{
+ at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN | (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
+ at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
+/*
+ * Reload the watchdog timer. (ie, pat the watchdog)
+ */
+static void inline at91_wdt_reload(void)
+{
+ at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
+/* ......................................................................... */
+
+/*
+ * Watchdog device is opened, and watchdog starts running.
+ */
+static int at91_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &at91wdt_busy))
+ return -EBUSY;
+
+ at91_wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+/*
+ * Close the watchdog device.
+ * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
+ * disabled.
+ */
+static int at91_wdt_close(struct inode *inode, struct file *file)
+{
+ if (!nowayout)
+ at91_wdt_stop(); /* Disable the watchdog when file is closed */
+
+ clear_bit(0, &at91wdt_busy);
+ return 0;
+}
+
+/*
+ * Change the watchdog time interval.
+ */
+static int at91_wdt_settimeout(int new_time)
+{
+ /*
+ * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
+ *
+ * Since WDV is a 16-bit counter, the maximum period is
+ * 65536 / 0.256 = 256 seconds.
+ */
+ if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
+ return -EINVAL;
+
+ /* Set new watchdog time. It will be used when at91_wdt_start() is called. */
+ wdt_time = new_time;
+ return 0;
+}
+
+static struct watchdog_info at91_wdt_info = {
+ .identity = "at91 watchdog",
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+};
+
+/*
+ * Handle commands from user-space.
+ */
+static int at91_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_value;
+
+ switch(cmd) {
+ case WDIOC_KEEPALIVE:
+ at91_wdt_reload(); /* pat the watchdog */
+ return 0;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &at91_wdt_info, sizeof(at91_wdt_info)) ? -EFAULT : 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (at91_wdt_settimeout(new_value))
+ return -EINVAL;
+
+ /* Enable new time value */
+ at91_wdt_start();
+
+ /* Return current value */
+ return put_user(wdt_time, p);
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdt_time, p);
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (new_value & WDIOS_DISABLECARD)
+ at91_wdt_stop();
+ if (new_value & WDIOS_ENABLECARD)
+ at91_wdt_start();
+ return 0;
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+ * Pat the watchdog whenever device is written to.
+ */
+static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ at91_wdt_reload(); /* pat the watchdog */
+ return len;
+}
+
+/* ......................................................................... */
+
+static const struct file_operations at91wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = at91_wdt_ioctl,
+ .open = at91_wdt_open,
+ .release = at91_wdt_close,
+ .write = at91_wdt_write,
+};
+
+static struct miscdevice at91wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &at91wdt_fops,
+};
+
+static int __init at91wdt_probe(struct platform_device *pdev)
+{
+ int res;
+
+ if (at91wdt_miscdev.dev)
+ return -EBUSY;
+ at91wdt_miscdev.dev = &pdev->dev;
+
+ res = misc_register(&at91wdt_miscdev);
+ if (res)
+ return res;
+
+ printk("AT91 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
+ return 0;
+}
+
+static int __exit at91wdt_remove(struct platform_device *pdev)
+{
+ int res;
+
+ res = misc_deregister(&at91wdt_miscdev);
+ if (!res)
+ at91wdt_miscdev.dev = NULL;
+
+ return res;
+}
+
+static void at91wdt_shutdown(struct platform_device *pdev)
+{
+ at91_wdt_stop();
+}
+
+#ifdef CONFIG_PM
+
+static int at91wdt_suspend(struct platform_device *pdev, pm_message_t message)
+{
+ at91_wdt_stop();
+ return 0;
+}
+
+static int at91wdt_resume(struct platform_device *pdev)
+{
+ if (at91wdt_busy)
+ at91_wdt_start();
+ return 0;
+}
+
+#else
+#define at91wdt_suspend NULL
+#define at91wdt_resume NULL
+#endif
+
+static struct platform_driver at91wdt_driver = {
+ .probe = at91wdt_probe,
+ .remove = __exit_p(at91wdt_remove),
+ .shutdown = at91wdt_shutdown,
+ .suspend = at91wdt_suspend,
+ .resume = at91wdt_resume,
+ .driver = {
+ .name = "at91_wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init at91_wdt_init(void)
+{
+ /* Check that the heartbeat value is within range; if not reset to the default */
+ if (at91_wdt_settimeout(wdt_time)) {
+ at91_wdt_settimeout(WDT_DEFAULT_TIME);
+ pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time);
+ }
+
+ return platform_driver_register(&at91wdt_driver);
+}
+
+static void __exit at91_wdt_exit(void)
+{
+ platform_driver_unregister(&at91wdt_driver);
+}
+
+module_init(at91_wdt_init);
+module_exit(at91_wdt_exit);
+
+MODULE_AUTHOR("Andrew Victor");
+MODULE_DESCRIPTION("Watchdog driver for Atmel AT91RM9200");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
* 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
*/
/* 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 */
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 {
{"ICH7 or ICH7R", 2},
{"ICH7-M", 2},
{"ICH7-M DH", 2},
+ {"ICH8 or ICH8R", 2},
+ {"ICH8DH", 2},
+ {"ICH8DO", 2},
{NULL,0}
};
{ 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);
spin_unlock(&iTCO_wdt_private.io_lock);
*time_left = (val8 * 6) / 10;
- }
+ } else
+ return -EINVAL;
return 0;
}
{
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 = {
case WDIOC_GETTIMELEFT:
{
+ int time_left;
+
if (iTCO_wdt_get_timeleft(&time_left))
return -EINVAL;
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;
}
if (ret) {
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (%d)\n",
WATCHDOG_MINOR, ret);
+ iounmap(wdt_base);
return ret;
}
wdt_clock = NULL;
}
+ iounmap(wdt_base);
misc_deregister(&s3c2410wdt_miscdev);
return 0;
}
--- /dev/null
+/*
+ * SMsC 37B787 Watchdog Timer driver for Linux 2.6.x.x
+ *
+ * Based on acquirewdt.c by Alan Cox <alan@redhat.com>
+ * and some other existing drivers
+ *
+ * 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.
+ *
+ * The authors do NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * (C) Copyright 2003-2006 Sven Anders <anders@anduras.de>
+ *
+ * History:
+ * 2003 - Created version 1.0 for Linux 2.4.x.
+ * 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
+ * features. Released version 1.1
+ *
+ * Theory of operation:
+ *
+ * A Watchdog Timer (WDT) is a hardware circuit that can
+ * reset the computer system in case of a software fault.
+ * You probably knew that already.
+ *
+ * Usually a userspace daemon will notify the kernel WDT driver
+ * via the /dev/watchdog special device file that userspace is
+ * still alive, at regular intervals. When such a notification
+ * occurs, the driver will usually tell the hardware watchdog
+ * that everything is in order, and that the watchdog should wait
+ * for yet another little while to reset the system.
+ * If userspace fails (RAM error, kernel bug, whatever), the
+ * notifications cease to occur, and the hardware watchdog will
+ * reset the system (causing a reboot) after the timeout occurs.
+ *
+ * Create device with:
+ * mknod /dev/watchdog c 10 130
+ *
+ * For an example userspace keep-alive daemon, see:
+ * Documentation/watchdog/watchdog.txt
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/delay.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>
+
+/* enable support for minutes as units? */
+/* (does not always work correctly, so disabled by default!) */
+#define SMSC_SUPPORT_MINUTES
+#undef SMSC_SUPPORT_MINUTES
+
+#define MAX_TIMEOUT 255
+
+#define UNIT_SECOND 0
+#define UNIT_MINUTE 1
+
+#define MODNAME "smsc37b787_wdt: "
+#define VERSION "1.1"
+
+#define IOPORT 0x3F0
+#define IOPORT_SIZE 2
+#define IODEV_NO 8
+
+static int unit = UNIT_SECOND; /* timer's unit */
+static int timeout = 60; /* timeout value: default is 60 "units" */
+static unsigned long timer_enabled = 0; /* is the timer enabled? */
+
+static char expect_close; /* is the close expected? */
+
+static spinlock_t io_lock; /* to guard the watchdog from io races */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+/* -- Low level function ----------------------------------------*/
+
+/* unlock the IO chip */
+
+static inline void open_io_config(void)
+{
+ outb(0x55, IOPORT);
+ mdelay(1);
+ outb(0x55, IOPORT);
+}
+
+/* lock the IO chip */
+static inline void close_io_config(void)
+{
+ outb(0xAA, IOPORT);
+}
+
+/* select the IO device */
+static inline void select_io_device(unsigned char devno)
+{
+ outb(0x07, IOPORT);
+ outb(devno, IOPORT+1);
+}
+
+/* write to the control register */
+static inline void write_io_cr(unsigned char reg, unsigned char data)
+{
+ outb(reg, IOPORT);
+ outb(data, IOPORT+1);
+}
+
+/* read from the control register */
+static inline char read_io_cr(unsigned char reg)
+{
+ outb(reg, IOPORT);
+ return inb(IOPORT+1);
+}
+
+/* -- Medium level functions ------------------------------------*/
+
+static inline void gpio_bit12(unsigned char reg)
+{
+ // -- General Purpose I/O Bit 1.2 --
+ // Bit 0, In/Out: 0 = Output, 1 = Input
+ // Bit 1, Polarity: 0 = No Invert, 1 = Invert
+ // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
+ // Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
+ // 11 = Either Edge Triggered Intr. 2
+ // Bit 5/6 (Reserved)
+ // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
+ write_io_cr(0xE2, reg);
+}
+
+static inline void gpio_bit13(unsigned char reg)
+{
+ // -- General Purpose I/O Bit 1.3 --
+ // Bit 0, In/Out: 0 = Output, 1 = Input
+ // Bit 1, Polarity: 0 = No Invert, 1 = Invert
+ // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
+ // Bit 3, Function select: 0 = GPI/O, 1 = LED
+ // Bit 4-6 (Reserved)
+ // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
+ write_io_cr(0xE3, reg);
+}
+
+static inline void wdt_timer_units(unsigned char new_units)
+{
+ // -- Watchdog timer units --
+ // Bit 0-6 (Reserved)
+ // Bit 7, WDT Time-out Value Units Select
+ // (0 = Minutes, 1 = Seconds)
+ write_io_cr(0xF1, new_units);
+}
+
+static inline void wdt_timeout_value(unsigned char new_timeout)
+{
+ // -- Watchdog Timer Time-out Value --
+ // Bit 0-7 Binary coded units (0=Disabled, 1..255)
+ write_io_cr(0xF2, new_timeout);
+}
+
+static inline void wdt_timer_conf(unsigned char conf)
+{
+ // -- Watchdog timer configuration --
+ // Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O
+ // Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
+ // Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr.
+ // Bit 3 Reset the timer
+ // (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled)
+ // Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
+ // 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
+ write_io_cr(0xF3, conf);
+}
+
+static inline void wdt_timer_ctrl(unsigned char reg)
+{
+ // -- Watchdog timer control --
+ // Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
+ // Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
+ // Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
+ // Bit 3 P20 Force Timeout enabled:
+ // 0 = P20 activity does not generate the WD timeout event
+ // 1 = P20 Allows rising edge of P20, from the keyboard
+ // controller, to force the WD timeout event.
+ // Bit 4 (Reserved)
+ // -- Soft power management --
+ // Bit 5 Stop Counter: 1 = Stop software power down counter
+ // set via register 0xB8, (self-cleaning)
+ // (Upon read: 0 = Counter running, 1 = Counter stopped)
+ // Bit 6 Restart Counter: 1 = Restart software power down counter
+ // set via register 0xB8, (self-cleaning)
+ // Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
+
+ write_io_cr(0xF4, reg);
+}
+
+/* -- Higher level functions ------------------------------------*/
+
+/* initialize watchdog */
+
+static void wb_smsc_wdt_initialize(void)
+{
+ unsigned char old;
+
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // enable the watchdog
+ gpio_bit13(0x08); // Select pin 80 = LED not GPIO
+ gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert
+
+ // disable the timeout
+ wdt_timeout_value(0);
+
+ // reset control register
+ wdt_timer_ctrl(0x00);
+
+ // reset configuration register
+ wdt_timer_conf(0x00);
+
+ // read old (timer units) register
+ old = read_io_cr(0xF1) & 0x7F;
+ if (unit == UNIT_SECOND) old |= 0x80; // set to seconds
+
+ // set the watchdog timer units
+ wdt_timer_units(old);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* shutdown the watchdog */
+
+static void wb_smsc_wdt_shutdown(void)
+{
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // disable the watchdog
+ gpio_bit13(0x09);
+ gpio_bit12(0x09);
+
+ // reset watchdog config register
+ wdt_timer_conf(0x00);
+
+ // reset watchdog control register
+ wdt_timer_ctrl(0x00);
+
+ // disable timeout
+ wdt_timeout_value(0x00);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* set timeout => enable watchdog */
+
+static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
+{
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // set Power LED to blink, if we enable the timeout
+ wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
+
+ // set timeout value
+ wdt_timeout_value(new_timeout);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* get timeout */
+
+static unsigned char wb_smsc_wdt_get_timeout(void)
+{
+ unsigned char set_timeout;
+
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+ set_timeout = read_io_cr(0xF2);
+ close_io_config();
+ spin_unlock(&io_lock);
+
+ return set_timeout;
+}
+
+/* disable watchdog */
+
+static void wb_smsc_wdt_disable(void)
+{
+ // set the timeout to 0 to disable the watchdog
+ wb_smsc_wdt_set_timeout(0);
+}
+
+/* enable watchdog by setting the current timeout */
+
+static void wb_smsc_wdt_enable(void)
+{
+ // set the current timeout...
+ wb_smsc_wdt_set_timeout(timeout);
+}
+
+/* reset the timer */
+
+static void wb_smsc_wdt_reset_timer(void)
+{
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // reset the timer
+ wdt_timeout_value(timeout);
+ wdt_timer_conf(0x08);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* return, if the watchdog is enabled (timeout is set...) */
+
+static int wb_smsc_wdt_status(void)
+{
+ return (wb_smsc_wdt_get_timeout() == 0) ? 0 : WDIOF_KEEPALIVEPING;
+}
+
+
+/* -- File operations -------------------------------------------*/
+
+/* open => enable watchdog and set initial timeout */
+
+static int wb_smsc_wdt_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+
+ if (test_and_set_bit(0, &timer_enabled))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Reload and activate timer */
+ wb_smsc_wdt_enable();
+
+ printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
+
+ return nonseekable_open(inode, file);
+}
+
+/* close => shut off the timer */
+
+static int wb_smsc_wdt_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer. */
+
+ if (expect_close == 42) {
+ wb_smsc_wdt_disable();
+ printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n");
+ } else {
+ printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n");
+ wb_smsc_wdt_reset_timer();
+ }
+
+ clear_bit(0, &timer_enabled);
+ expect_close = 0;
+ return 0;
+}
+
+/* write => update the timer to keep the machine alive */
+
+static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* reset expect flag */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ wb_smsc_wdt_reset_timer();
+ }
+ return len;
+}
+
+/* ioctl => control interface */
+
+static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_timeout;
+
+ union {
+ struct watchdog_info __user *ident;
+ int __user *i;
+ } uarg;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "SMsC 37B787 Watchdog"
+ };
+
+ uarg.i = (int __user *)arg;
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ return put_user(wb_smsc_wdt_status(), uarg.i);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+
+ case WDIOC_KEEPALIVE:
+ wb_smsc_wdt_reset_timer();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+
+ // the API states this is given in secs
+ if (unit == UNIT_MINUTE)
+ new_timeout /= 60;
+
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wb_smsc_wdt_set_timeout(timeout);
+
+ // fall through and return the new timeout...
+
+ case WDIOC_GETTIMEOUT:
+
+ new_timeout = timeout;
+
+ if (unit == UNIT_MINUTE)
+ new_timeout *= 60;
+
+ return put_user(new_timeout, uarg.i);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, uarg.i))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ wb_smsc_wdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wb_smsc_wdt_enable();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+}
+
+/* -- Notifier funtions -----------------------------------------*/
+
+static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ {
+ // set timeout to 0, to avoid possible race-condition
+ timeout = 0;
+ wb_smsc_wdt_disable();
+ }
+ return NOTIFY_DONE;
+}
+
+/* -- Module's structures ---------------------------------------*/
+
+static struct file_operations wb_smsc_wdt_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wb_smsc_wdt_write,
+ .ioctl = wb_smsc_wdt_ioctl,
+ .open = wb_smsc_wdt_open,
+ .release = wb_smsc_wdt_release,
+};
+
+static struct notifier_block wb_smsc_wdt_notifier =
+{
+ .notifier_call = wb_smsc_wdt_notify_sys,
+};
+
+static struct miscdevice wb_smsc_wdt_miscdev =
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wb_smsc_wdt_fops,
+};
+
+/* -- Module init functions -------------------------------------*/
+
+/* module's "constructor" */
+
+static int __init wb_smsc_wdt_init(void)
+{
+ int ret;
+
+ spin_lock_init(&io_lock);
+
+ printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n");
+
+ if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) {
+ printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT);
+ ret = -EBUSY;
+ goto out_pnp;
+ }
+
+ // set new maximum, if it's too big
+ if (timeout > MAX_TIMEOUT)
+ timeout = MAX_TIMEOUT;
+
+ // init the watchdog timer
+ wb_smsc_wdt_initialize();
+
+ ret = register_reboot_notifier(&wb_smsc_wdt_notifier);
+ if (ret) {
+ printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret);
+ goto out_io;
+ }
+
+ ret = misc_register(&wb_smsc_wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
+ goto out_rbt;
+ }
+
+ // output info
+ printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
+ printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout);
+
+ // ret = 0
+
+out_clean:
+ return ret;
+
+out_rbt:
+ unregister_reboot_notifier(&wb_smsc_wdt_notifier);
+
+out_io:
+ release_region(IOPORT, IOPORT_SIZE);
+
+out_pnp:
+ goto out_clean;
+}
+
+/* module's "destructor" */
+
+static void __exit wb_smsc_wdt_exit(void)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ {
+ wb_smsc_wdt_shutdown();
+ printk(KERN_INFO MODNAME "Watchdog disabled.\n");
+ }
+
+ misc_deregister(&wb_smsc_wdt_miscdev);
+ unregister_reboot_notifier(&wb_smsc_wdt_notifier);
+ release_region(IOPORT, IOPORT_SIZE);
+
+ printk("SMsC 37B787 watchdog component driver removed.\n");
+}
+
+module_init(wb_smsc_wdt_init);
+module_exit(wb_smsc_wdt_exit);
+
+MODULE_AUTHOR("Sven Anders <anders@anduras.de>");
+MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+#ifdef SMSC_SUPPORT_MINUTES
+module_param(unit, int, 0);
+MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0");
+#endif
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/uaccess.h>
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;
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
{
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)) {
--- /dev/null
+/*
+ * 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 Pádraig 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);
projects / powerpc.git / commitdiff