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-rw-r--r--drivers/watchdog/Kconfig33
-rw-r--r--drivers/watchdog/Makefile3
-rw-r--r--drivers/watchdog/alim1535_wdt.c20
-rw-r--r--drivers/watchdog/alim7101_wdt.c18
-rw-r--r--drivers/watchdog/ar7_wdt.c2
-rw-r--r--drivers/watchdog/at32ap700x_wdt.c69
-rw-r--r--drivers/watchdog/bfin_wdt.c4
-rw-r--r--drivers/watchdog/it8712f_wdt.c400
-rw-r--r--drivers/watchdog/mpc5200_wdt.c2
-rw-r--r--drivers/watchdog/mtx-1_wdt.c2
-rw-r--r--drivers/watchdog/sbc60xxwdt.c18
-rw-r--r--drivers/watchdog/sbc7240_wdt.c324
-rw-r--r--drivers/watchdog/scx200_wdt.c10
-rw-r--r--drivers/watchdog/shwdt.c2
-rw-r--r--drivers/watchdog/txx9wdt.c276
-rw-r--r--drivers/watchdog/w83877f_wdt.c18
-rw-r--r--drivers/watchdog/w83977f_wdt.c18
-rw-r--r--drivers/watchdog/wdt.c30
-rw-r--r--drivers/watchdog/wdt977.c18
19 files changed, 1192 insertions, 75 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 2792bc1a726..afcdc69e37d 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -223,7 +223,7 @@ config DAVINCI_WATCHDOG
config AT32AP700X_WDT
tristate "AT32AP700x watchdog"
- depends on CPU_AT32AP7000
+ depends on CPU_AT32AP700X
help
Watchdog timer embedded into AT32AP700x devices. This will reboot
your system when the timeout is reached.
@@ -392,6 +392,16 @@ config ITCO_VENDOR_SUPPORT
devices. At this moment we only have additional support for some
SuperMicro Inc. motherboards.
+config IT8712F_WDT
+ tristate "IT8712F (Smart Guardian) Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the built-in watchdog timer on the IT8712F
+ Super I/0 chipset used on many motherboards.
+
+ To compile this driver as a module, choose M here: the
+ module will be called it8712f_wdt.
+
config SC1200_WDT
tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
depends on X86
@@ -456,6 +466,19 @@ config SBC8360_WDT
Most people will say N.
+config SBC7240_WDT
+ tristate "SBC Nano 7240 Watchdog Timer"
+ depends on X86_32
+ ---help---
+ This is the driver for the hardware watchdog found on the IEI
+ single board computers EPIC Nano 7240 (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 sbc7240_wdt.
+
config CPU5_WDT
tristate "SMA CPU5 Watchdog"
depends on X86
@@ -586,7 +609,7 @@ config SBC_EPX_C3_WATCHDOG
config INDYDOG
tristate "Indy/I2 Hardware Watchdog"
- depends on SGI_IP22
+ depends on SGI_HAS_INDYDOG
help
Hardware driver for the Indy's/I2's watchdog. This is a
watchdog timer that will reboot the machine after a 60 second
@@ -616,6 +639,12 @@ config AR7_WDT
help
Hardware driver for the TI AR7 Watchdog Timer.
+config TXX9_WDT
+ tristate "Toshiba TXx9 Watchdog Timer"
+ depends on CPU_TX39XX || CPU_TX49XX
+ help
+ Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
+
# PARISC Architecture
# POWERPC Architecture
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 7d9e5734f8b..ebc21146d40 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -66,11 +66,13 @@ obj-$(CONFIG_IBMASR) += ibmasr.o
obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o iTCO_vendor_support.o
+obj-$(CONFIG_IT8712F_WDT) += it8712f_wdt.o
obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
+obj-$(CONFIG_SBC7240_WDT) += sbc7240_wdt.o
obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
@@ -91,6 +93,7 @@ obj-$(CONFIG_INDYDOG) += indydog.o
obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
+obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
# PARISC Architecture
diff --git a/drivers/watchdog/alim1535_wdt.c b/drivers/watchdog/alim1535_wdt.c
index b481cc0e32e..2b1fbdb2fcf 100644
--- a/drivers/watchdog/alim1535_wdt.c
+++ b/drivers/watchdog/alim1535_wdt.c
@@ -413,18 +413,18 @@ static int __init watchdog_init(void)
/* Calculate the watchdog's timeout */
ali_settimer(timeout);
- ret = misc_register(&ali_miscdev);
+ ret = register_reboot_notifier(&ali_notifier);
if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
goto out;
}
- ret = register_reboot_notifier(&ali_notifier);
+ ret = misc_register(&ali_miscdev);
if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto unreg_miscdev;
+ 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",
@@ -432,8 +432,8 @@ static int __init watchdog_init(void)
out:
return ret;
-unreg_miscdev:
- misc_deregister(&ali_miscdev);
+unreg_reboot:
+ unregister_reboot_notifier(&ali_notifier);
goto out;
}
@@ -449,8 +449,8 @@ static void __exit watchdog_exit(void)
ali_stop();
/* Deregister */
- unregister_reboot_notifier(&ali_notifier);
misc_deregister(&ali_miscdev);
+ unregister_reboot_notifier(&ali_notifier);
pci_dev_put(ali_pci);
}
diff --git a/drivers/watchdog/alim7101_wdt.c b/drivers/watchdog/alim7101_wdt.c
index 67aed9f8c36..238273c9865 100644
--- a/drivers/watchdog/alim7101_wdt.c
+++ b/drivers/watchdog/alim7101_wdt.c
@@ -377,18 +377,18 @@ static int __init alim7101_wdt_init(void)
timeout);
}
- rc = misc_register(&wdt_miscdev);
+ rc = register_reboot_notifier(&wdt_notifier);
if (rc) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
goto err_out;
}
- rc = register_reboot_notifier(&wdt_notifier);
+ rc = misc_register(&wdt_miscdev);
if (rc) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_reboot;
}
if (nowayout) {
@@ -399,8 +399,8 @@ static int __init alim7101_wdt_init(void)
timeout, nowayout);
return 0;
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
+err_out_reboot:
+ unregister_reboot_notifier(&wdt_notifier);
err_out:
pci_dev_put(alim7101_pmu);
return rc;
diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c
index cdaab8c3d3d..2eb48c0df32 100644
--- a/drivers/watchdog/ar7_wdt.c
+++ b/drivers/watchdog/ar7_wdt.c
@@ -279,7 +279,7 @@ static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
}
}
-static struct file_operations ar7_wdt_fops = {
+static const struct file_operations ar7_wdt_fops = {
.owner = THIS_MODULE,
.write = ar7_wdt_write,
.ioctl = ar7_wdt_ioctl,
diff --git a/drivers/watchdog/at32ap700x_wdt.c b/drivers/watchdog/at32ap700x_wdt.c
index 54a516169d0..fb5ed6478f7 100644
--- a/drivers/watchdog/at32ap700x_wdt.c
+++ b/drivers/watchdog/at32ap700x_wdt.c
@@ -6,6 +6,19 @@
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
+ *
+ *
+ * Errata: WDT Clear is blocked after WDT Reset
+ *
+ * A watchdog timer event will, after reset, block writes to the WDT_CLEAR
+ * register, preventing the program to clear the next Watchdog Timer Reset.
+ *
+ * If you still want to use the WDT after a WDT reset a small code can be
+ * insterted at the startup checking the AVR32_PM.rcause register for WDT reset
+ * and use a GPIO pin to reset the system. This method requires that one of the
+ * GPIO pins are available and connected externally to the RESET_N pin. After
+ * the GPIO pin has pulled down the reset line the GPIO will be reset and leave
+ * the pin tristated with pullup.
*/
#include <linux/init.h>
@@ -44,6 +57,13 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
#define WDT_CLR 0x04
+#define WDT_RCAUSE 0x10
+#define WDT_RCAUSE_POR 0
+#define WDT_RCAUSE_EXT 2
+#define WDT_RCAUSE_WDT 3
+#define WDT_RCAUSE_JTAG 4
+#define WDT_RCAUSE_SERP 5
+
#define WDT_BIT(name) (1 << WDT_##name)
#define WDT_BF(name, value) ((value) << WDT_##name)
@@ -56,6 +76,7 @@ struct wdt_at32ap700x {
void __iomem *regs;
spinlock_t io_lock;
int timeout;
+ int boot_status;
unsigned long users;
struct miscdevice miscdev;
};
@@ -126,7 +147,7 @@ static int at32_wdt_close(struct inode *inode, struct file *file)
at32_wdt_stop();
} else {
dev_dbg(wdt->miscdev.parent,
- "Unexpected close, not stopping watchdog!\n");
+ "unexpected close, not stopping watchdog!\n");
at32_wdt_pat();
}
clear_bit(1, &wdt->users);
@@ -154,6 +175,33 @@ static int at32_wdt_settimeout(int time)
return 0;
}
+/*
+ * Get the watchdog status.
+ */
+static int at32_wdt_get_status(void)
+{
+ int rcause;
+ int status = 0;
+
+ rcause = wdt_readl(wdt, RCAUSE);
+
+ switch (rcause) {
+ case WDT_BIT(RCAUSE_EXT):
+ status = WDIOF_EXTERN1;
+ break;
+ case WDT_BIT(RCAUSE_WDT):
+ status = WDIOF_CARDRESET;
+ break;
+ case WDT_BIT(RCAUSE_POR): /* fall through */
+ case WDT_BIT(RCAUSE_JTAG): /* fall through */
+ case WDT_BIT(RCAUSE_SERP): /* fall through */
+ default:
+ break;
+ }
+
+ return status;
+}
+
static struct watchdog_info at32_wdt_info = {
.identity = "at32ap700x watchdog",
.options = WDIOF_SETTIMEOUT |
@@ -194,10 +242,12 @@ static int at32_wdt_ioctl(struct inode *inode, struct file *file,
case WDIOC_GETTIMEOUT:
ret = put_user(wdt->timeout, p);
break;
- case WDIOC_GETSTATUS: /* fall through */
- case WDIOC_GETBOOTSTATUS:
+ case WDIOC_GETSTATUS:
ret = put_user(0, p);
break;
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(wdt->boot_status, p);
+ break;
case WDIOC_SETOPTIONS:
ret = get_user(time, p);
if (ret)
@@ -282,8 +332,19 @@ static int __init at32_wdt_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "could not map I/O memory\n");
goto err_free;
}
+
spin_lock_init(&wdt->io_lock);
- wdt->users = 0;
+ wdt->boot_status = at32_wdt_get_status();
+
+ /* Work-around for watchdog silicon errata. */
+ if (wdt->boot_status & WDIOF_CARDRESET) {
+ dev_info(&pdev->dev, "CPU must be reset with external "
+ "reset or POR due to silicon errata.\n");
+ ret = -EIO;
+ goto err_iounmap;
+ } else {
+ wdt->users = 0;
+ }
wdt->miscdev.minor = WATCHDOG_MINOR;
wdt->miscdev.name = "watchdog";
wdt->miscdev.fops = &at32_wdt_fops;
diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c
index 309d27913fc..472be10f068 100644
--- a/drivers/watchdog/bfin_wdt.c
+++ b/drivers/watchdog/bfin_wdt.c
@@ -71,7 +71,7 @@ static int nowayout = WATCHDOG_NOWAYOUT;
static struct watchdog_info bfin_wdt_info;
static unsigned long open_check;
static char expect_close;
-static spinlock_t bfin_wdt_spinlock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(bfin_wdt_spinlock);
/**
* bfin_wdt_keepalive - Keep the Userspace Watchdog Alive
@@ -390,7 +390,7 @@ static struct platform_driver bfin_wdt_driver = {
.resume = bfin_wdt_resume,
};
-static struct file_operations bfin_wdt_fops = {
+static const struct file_operations bfin_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = bfin_wdt_write,
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
new file mode 100644
index 00000000000..1b6d7d1b715
--- /dev/null
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -0,0 +1,400 @@
+/*
+ * IT8712F "Smart Guardian" Watchdog support
+ *
+ * Copyright (c) 2006-2007 Jorge Boncompte - DTI2 <jorge@dti2.net>
+ *
+ * Based on info and code taken from:
+ *
+ * drivers/char/watchdog/scx200_wdt.c
+ * drivers/hwmon/it87.c
+ * IT8712F EC-LPC I/O Preliminary Specification 0.9.2.pdf
+ *
+ * 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 author(s) of this software shall not be held liable for damages
+ * of any nature resulting due to the use of this software. This
+ * software is provided AS-IS with no warranties.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/fs.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define NAME "it8712f_wdt"
+
+MODULE_AUTHOR("Jorge Boncompte - DTI2 <jorge@dti2.net>");
+MODULE_DESCRIPTION("IT8712F Watchdog Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+static int margin = 60; /* in seconds */
+module_param(margin, int, 0);
+MODULE_PARM_DESC(margin, "Watchdog margin in seconds");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
+
+static struct semaphore it8712f_wdt_sem;
+static unsigned expect_close;
+static spinlock_t io_lock;
+
+/* Dog Food address - We use the game port address */
+static unsigned short address;
+
+#define REG 0x2e /* The register to read/write */
+#define VAL 0x2f /* The value to read/write */
+
+#define LDN 0x07 /* Register: Logical device select */
+#define DEVID 0x20 /* Register: Device ID */
+#define DEVREV 0x22 /* Register: Device Revision */
+#define ACT_REG 0x30 /* LDN Register: Activation */
+#define BASE_REG 0x60 /* LDN Register: Base address */
+
+#define IT8712F_DEVID 0x8712
+
+#define LDN_GPIO 0x07 /* GPIO and Watch Dog Timer */
+#define LDN_GAME 0x09 /* Game Port */
+
+#define WDT_CONTROL 0x71 /* WDT Register: Control */
+#define WDT_CONFIG 0x72 /* WDT Register: Configuration */
+#define WDT_TIMEOUT 0x73 /* WDT Register: Timeout Value */
+
+#define WDT_RESET_GAME 0x10
+#define WDT_RESET_KBD 0x20
+#define WDT_RESET_MOUSE 0x40
+#define WDT_RESET_CIR 0x80
+
+#define WDT_UNIT_SEC 0x80 /* If 0 in MINUTES */
+
+#define WDT_OUT_PWROK 0x10
+#define WDT_OUT_KRST 0x40
+
+static int
+superio_inb(int reg)
+{
+ outb(reg, REG);
+ return inb(VAL);
+}
+
+static void
+superio_outb(int val, int reg)
+{
+ outb(reg, REG);
+ outb(val, VAL);
+}
+
+static int
+superio_inw(int reg)
+{
+ int val;
+ outb(reg++, REG);
+ val = inb(VAL) << 8;
+ outb(reg, REG);
+ val |= inb(VAL);
+ return val;
+}
+
+static inline void
+superio_select(int ldn)
+{
+ outb(LDN, REG);
+ outb(ldn, VAL);
+}
+
+static inline void
+superio_enter(void)
+{
+ spin_lock(&io_lock);
+ outb(0x87, REG);
+ outb(0x01, REG);
+ outb(0x55, REG);
+ outb(0x55, REG);
+}
+
+static inline void
+superio_exit(void)
+{
+ outb(0x02, REG);
+ outb(0x02, VAL);
+ spin_unlock(&io_lock);
+}
+
+static inline void
+it8712f_wdt_ping(void)
+{
+ inb(address);
+}
+
+static void
+it8712f_wdt_update_margin(void)
+{
+ int config = WDT_OUT_KRST | WDT_OUT_PWROK;
+
+ printk(KERN_INFO NAME ": timer margin %d seconds\n", margin);
+
+ /* The timeout register only has 8bits wide */
+ if (margin < 256)
+ config |= WDT_UNIT_SEC; /* else UNIT are MINUTES */
+ superio_outb(config, WDT_CONFIG);
+
+ superio_outb((margin > 255) ? (margin / 60) : margin, WDT_TIMEOUT);
+}
+
+static void
+it8712f_wdt_enable(void)
+{
+ printk(KERN_DEBUG NAME ": enabling watchdog timer\n");
+ superio_enter();
+ superio_select(LDN_GPIO);
+
+ superio_outb(WDT_RESET_GAME, WDT_CONTROL);
+
+ it8712f_wdt_update_margin();
+
+ superio_exit();
+
+ it8712f_wdt_ping();
+}
+
+static void
+it8712f_wdt_disable(void)
+{
+ printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
+
+ superio_enter();
+ superio_select(LDN_GPIO);
+
+ superio_outb(0, WDT_CONFIG);
+ superio_outb(0, WDT_CONTROL);
+ superio_outb(0, WDT_TIMEOUT);
+
+ superio_exit();
+}
+
+static int
+it8712f_wdt_notify(struct notifier_block *this,
+ unsigned long code, void *unused)
+{
+ if (code == SYS_HALT || code == SYS_POWER_OFF)
+ if (!nowayout)
+ it8712f_wdt_disable();
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block it8712f_wdt_notifier = {
+ .notifier_call = it8712f_wdt_notify,
+};
+
+static ssize_t
+it8712f_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* check for a magic close character */
+ if (len) {
+ size_t i;
+
+ it8712f_wdt_ping();
+
+ expect_close = 0;
+ for (i = 0; i < len; ++i) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ return len;
+}
+
+static int
+it8712f_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .identity = "IT8712F Watchdog",
+ .firmware_version = 1,
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ };
+ int new_margin;
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ it8712f_wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (new_margin < 1)
+ return -EINVAL;
+ margin = new_margin;
+ superio_enter();
+ superio_select(LDN_GPIO);
+
+ it8712f_wdt_update_margin();
+
+ superio_exit();
+ it8712f_wdt_ping();
+ case WDIOC_GETTIMEOUT:
+ if (put_user(margin, p))
+ return -EFAULT;
+ return 0;
+ }
+}
+
+static int
+it8712f_wdt_open(struct inode *inode, struct file *file)
+{
+ /* only allow one at a time */
+ if (down_trylock(&it8712f_wdt_sem))
+ return -EBUSY;
+ it8712f_wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static int
+it8712f_wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close != 42) {
+ printk(KERN_WARNING NAME
+ ": watchdog device closed unexpectedly, will not"
+ " disable the watchdog timer\n");
+ } else if (!nowayout) {
+ it8712f_wdt_disable();
+ }
+ expect_close = 0;
+ up(&it8712f_wdt_sem);
+
+ return 0;
+}
+
+static const struct file_operations it8712f_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = it8712f_wdt_write,
+ .ioctl = it8712f_wdt_ioctl,
+ .open = it8712f_wdt_open,
+ .release = it8712f_wdt_release,
+};
+
+static struct miscdevice it8712f_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &it8712f_wdt_fops,
+};
+
+static int __init
+it8712f_wdt_find(unsigned short *address)
+{
+ int err = -ENODEV;
+ int chip_type;
+
+ superio_enter();
+ chip_type = superio_inw(DEVID);
+ if (chip_type != IT8712F_DEVID)
+ goto exit;
+
+ superio_select(LDN_GAME);
+ superio_outb(1, ACT_REG);
+ if (!(superio_inb(ACT_REG) & 0x01)) {
+ printk(KERN_ERR NAME ": Device not activated, skipping\n");
+ goto exit;
+ }
+
+ *address = superio_inw(BASE_REG);
+ if (*address == 0) {
+ printk(KERN_ERR NAME ": Base address not set, skipping\n");
+ goto exit;
+ }
+
+ err = 0;
+ printk(KERN_DEBUG NAME ": Found IT%04xF chip revision %d - "
+ "using DogFood address 0x%x\n",
+ chip_type, superio_inb(DEVREV) & 0x0f, *address);
+
+exit:
+ superio_exit();
+ return err;
+}
+
+static int __init
+it8712f_wdt_init(void)
+{
+ int err = 0;
+
+ spin_lock_init(&io_lock);
+
+ if (it8712f_wdt_find(&address))
+ return -ENODEV;
+
+ if (!request_region(address, 1, "IT8712F Watchdog")) {
+ printk(KERN_WARNING NAME ": watchdog I/O region busy\n");
+ return -EBUSY;
+ }
+
+ it8712f_wdt_disable();
+
+ sema_init(&it8712f_wdt_sem, 1);
+
+ err = register_reboot_notifier(&it8712f_wdt_notifier);
+ if (err) {
+ printk(KERN_ERR NAME ": unable to register reboot notifier\n");
+ goto out;
+ }
+
+ err = misc_register(&it8712f_wdt_miscdev);
+ if (err) {
+ printk(KERN_ERR NAME
+ ": cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, err);
+ goto reboot_out;
+ }
+
+ return 0;
+
+
+reboot_out:
+ unregister_reboot_notifier(&it8712f_wdt_notifier);
+out:
+ release_region(address, 1);
+ return err;
+}
+
+static void __exit
+it8712f_wdt_exit(void)
+{
+ misc_deregister(&it8712f_wdt_miscdev);
+ unregister_reboot_notifier(&it8712f_wdt_notifier);
+ release_region(address, 1);
+}
+
+module_init(it8712f_wdt_init);
+module_exit(it8712f_wdt_exit);
diff --git a/drivers/watchdog/mpc5200_wdt.c b/drivers/watchdog/mpc5200_wdt.c
index 11f6a111e75..80a91d4cea1 100644
--- a/drivers/watchdog/mpc5200_wdt.c
+++ b/drivers/watchdog/mpc5200_wdt.c
@@ -158,7 +158,7 @@ static int mpc5200_wdt_release(struct inode *inode, struct file *file)
return 0;
}
-static struct file_operations mpc5200_wdt_fops = {
+static const struct file_operations mpc5200_wdt_fops = {
.owner = THIS_MODULE,
.write = mpc5200_wdt_write,
.ioctl = mpc5200_wdt_ioctl,
diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
index dcfd401a7ad..98451747d3c 100644
--- a/drivers/watchdog/mtx-1_wdt.c
+++ b/drivers/watchdog/mtx-1_wdt.c
@@ -180,7 +180,7 @@ static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count,
return count;
}
-static struct file_operations mtx1_wdt_fops = {
+static const struct file_operations mtx1_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = mtx1_wdt_ioctl,
diff --git a/drivers/watchdog/sbc60xxwdt.c b/drivers/watchdog/sbc60xxwdt.c
index e4f3cb6090b..ef76f01625e 100644
--- a/drivers/watchdog/sbc60xxwdt.c
+++ b/drivers/watchdog/sbc60xxwdt.c
@@ -359,20 +359,20 @@ static int __init sbc60xxwdt_init(void)
}
}
- rc = misc_register(&wdt_miscdev);
+ rc = register_reboot_notifier(&wdt_notifier);
if (rc)
{
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
goto err_out_region2;
}
- rc = register_reboot_notifier(&wdt_notifier);
+ rc = misc_register(&wdt_miscdev);
if (rc)
{
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_reboot;
}
printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised. timeout=%d sec (nowayout=%d)\n",
@@ -380,8 +380,8 @@ static int __init sbc60xxwdt_init(void)
return 0;
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
+err_out_reboot:
+ unregister_reboot_notifier(&wdt_notifier);
err_out_region2:
if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
release_region(wdt_stop,1);
diff --git a/drivers/watchdog/sbc7240_wdt.c b/drivers/watchdog/sbc7240_wdt.c
new file mode 100644
index 00000000000..4c8cefbd862
--- /dev/null
+++ b/drivers/watchdog/sbc7240_wdt.c
@@ -0,0 +1,324 @@
+/*
+ * NANO7240 SBC Watchdog device driver
+ *
+ * Based on w83877f.c by Scott Jennings,
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * (c) Copyright 2007 Gilles GIGAN <gilles.gigan@jcu.edu.au>
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/miscdevice.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <asm/atomic.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#define SBC7240_PREFIX "sbc7240_wdt: "
+
+#define SBC7240_ENABLE_PORT 0x443
+#define SBC7240_DISABLE_PORT 0x043
+#define SBC7240_SET_TIMEOUT_PORT SBC7240_ENABLE_PORT
+#define SBC7240_MAGIC_CHAR 'V'
+
+#define SBC7240_TIMEOUT 30
+#define SBC7240_MAX_TIMEOUT 255
+static int timeout = SBC7240_TIMEOUT; /* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<="
+ __MODULE_STRING(SBC7240_MAX_TIMEOUT) ", default="
+ __MODULE_STRING(SBC7240_TIMEOUT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Disable watchdog when closing device file");
+
+#define SBC7240_OPEN_STATUS_BIT 0
+#define SBC7240_ENABLED_STATUS_BIT 1
+#define SBC7240_EXPECT_CLOSE_STATUS_BIT 2
+static unsigned long wdt_status;
+
+/*
+ * Utility routines
+ */
+
+static void wdt_disable(void)
+{
+ /* disable the watchdog */
+ if (test_and_clear_bit(SBC7240_ENABLED_STATUS_BIT, &wdt_status)) {
+ inb_p(SBC7240_DISABLE_PORT);
+ printk(KERN_INFO SBC7240_PREFIX
+ "Watchdog timer is now disabled.\n");
+ }
+}
+
+static void wdt_enable(void)
+{
+ /* enable the watchdog */
+ if (!test_and_set_bit(SBC7240_ENABLED_STATUS_BIT, &wdt_status)) {
+ inb_p(SBC7240_ENABLE_PORT);
+ printk(KERN_INFO SBC7240_PREFIX
+ "Watchdog timer is now enabled.\n");
+ }
+}
+
+static int wdt_set_timeout(int t)
+{
+ if (t < 1 || t > SBC7240_MAX_TIMEOUT) {
+ printk(KERN_ERR SBC7240_PREFIX
+ "timeout value must be 1<=x<=%d\n",
+ SBC7240_MAX_TIMEOUT);
+ return -1;
+ }
+ /* set the timeout */
+ outb_p((unsigned)t, SBC7240_SET_TIMEOUT_PORT);
+ timeout = t;
+ printk(KERN_INFO SBC7240_PREFIX "timeout set to %d seconds\n", t);
+ return 0;
+}
+
+/* Whack the dog */
+static inline void wdt_keepalive(void)
+{
+ if (test_bit(SBC7240_ENABLED_STATUS_BIT, &wdt_status))
+ inb_p(SBC7240_ENABLE_PORT);
+}
+
+/*
+ * /dev/watchdog handling
+ */
+static ssize_t fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ size_t i;
+ char c;
+
+ if (count) {
+ if (!nowayout) {
+ clear_bit(SBC7240_EXPECT_CLOSE_STATUS_BIT,
+ &wdt_status);
+
+ /* is there a magic char ? */
+ for (i = 0; i != count; i++) {
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == SBC7240_MAGIC_CHAR) {
+ set_bit(SBC7240_EXPECT_CLOSE_STATUS_BIT,
+ &wdt_status);
+ break;
+ }
+ }
+ }
+
+ wdt_keepalive();
+ }
+
+ return count;
+}
+
+static int fop_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(SBC7240_OPEN_STATUS_BIT, &wdt_status))
+ return -EBUSY;
+
+ wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static int fop_close(struct inode *inode, struct file *file)
+{
+ if (test_and_clear_bit(SBC7240_EXPECT_CLOSE_STATUS_BIT, &wdt_status)
+ || !nowayout) {
+ wdt_disable();
+ } else {
+ printk(KERN_CRIT SBC7240_PREFIX
+ "Unexpected close, not stopping watchdog!\n");
+ wdt_keepalive();
+ }
+
+ clear_bit(SBC7240_OPEN_STATUS_BIT, &wdt_status);
+ return 0;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING|
+ WDIOF_SETTIMEOUT|
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "SBC7240",
+};
+
+
+static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user
+ ((void __user *)arg, &ident, sizeof(ident))
+ ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, (int __user *)arg);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:{
+ int options;
+ int retval = -EINVAL;
+
+ if (get_user(options, (int __user *)arg))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ wdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wdt_enable();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:{
+ int new_timeout;
+
+ if (get_user(new_timeout, (int __user *)arg))
+ return -EFAULT;
+
+ if (wdt_set_timeout(new_timeout))
+ return -EINVAL;
+
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, (int __user *)arg);
+ default:
+ return -ENOTTY;
+ }
+}
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = fop_write,
+ .open = fop_open,
+ .release = fop_close,
+ .ioctl = fop_ioctl,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+/*
+ * 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)
+ wdt_disable();
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block wdt_notifier = {
+ .notifier_call = wdt_notify_sys,
+};
+
+static void __exit sbc7240_wdt_unload(void)
+{
+ printk(KERN_INFO SBC7240_PREFIX "Removing watchdog\n");
+ misc_deregister(&wdt_miscdev);
+
+ unregister_reboot_notifier(&wdt_notifier);
+ release_region(SBC7240_ENABLE_PORT, 1);
+}
+
+static int __init sbc7240_wdt_init(void)
+{
+ int rc = -EBUSY;
+
+ if (!request_region(SBC7240_ENABLE_PORT, 1, "SBC7240 WDT")) {
+ printk(KERN_ERR SBC7240_PREFIX
+ "I/O address 0x%04x already in use\n",
+ SBC7240_ENABLE_PORT);
+ rc = -EIO;
+ goto err_out;
+ }
+
+ /* The IO port 0x043 used to disable the watchdog
+ * is already claimed by the system timer, so we
+ * cant request_region() it ...*/
+
+ if (timeout < 1 || timeout > SBC7240_MAX_TIMEOUT) {
+ timeout = SBC7240_TIMEOUT;
+ printk(KERN_INFO SBC7240_PREFIX
+ "timeout value must be 1<=x<=%d, using %d\n",
+ SBC7240_MAX_TIMEOUT, timeout);
+ }
+ wdt_set_timeout(timeout);
+ wdt_disable();
+
+ rc = register_reboot_notifier(&wdt_notifier);
+ if (rc) {
+ printk(KERN_ERR SBC7240_PREFIX
+ "cannot register reboot notifier (err=%d)\n", rc);
+ goto err_out_region;
+ }
+
+ rc = misc_register(&wdt_miscdev);
+ if (rc) {
+ printk(KERN_ERR SBC7240_PREFIX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_reboot_notifier;
+ }
+
+ printk(KERN_INFO SBC7240_PREFIX
+ "Watchdog driver for SBC7240 initialised (nowayout=%d)\n",
+ nowayout);
+
+ return 0;
+
+err_out_reboot_notifier:
+ unregister_reboot_notifier(&wdt_notifier);
+err_out_region:
+ release_region(SBC7240_ENABLE_PORT, 1);
+err_out:
+ return rc;
+}
+
+module_init(sbc7240_wdt_init);
+module_exit(sbc7240_wdt_unload);
+
+MODULE_AUTHOR("Gilles Gigan");
+MODULE_DESCRIPTION("Watchdog device driver for single board"
+ " computers EPIC Nano 7240 from iEi");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
diff --git a/drivers/watchdog/scx200_wdt.c b/drivers/watchdog/scx200_wdt.c
index d4fd0fa2f17..d55882bca31 100644
--- a/drivers/watchdog/scx200_wdt.c
+++ b/drivers/watchdog/scx200_wdt.c
@@ -231,17 +231,17 @@ static int __init scx200_wdt_init(void)
sema_init(&open_semaphore, 1);
- r = misc_register(&scx200_wdt_miscdev);
+ r = register_reboot_notifier(&scx200_wdt_notifier);
if (r) {
+ printk(KERN_ERR NAME ": unable to register reboot notifier");
release_region(scx200_cb_base + SCx200_WDT_OFFSET,
SCx200_WDT_SIZE);
return r;
}
- r = register_reboot_notifier(&scx200_wdt_notifier);
+ r = misc_register(&scx200_wdt_miscdev);
if (r) {
- printk(KERN_ERR NAME ": unable to register reboot notifier");
- misc_deregister(&scx200_wdt_miscdev);
+ unregister_reboot_notifier(&scx200_wdt_notifier);
release_region(scx200_cb_base + SCx200_WDT_OFFSET,
SCx200_WDT_SIZE);
return r;
@@ -252,8 +252,8 @@ static int __init scx200_wdt_init(void)
static void __exit scx200_wdt_cleanup(void)
{
- unregister_reboot_notifier(&scx200_wdt_notifier);
misc_deregister(&scx200_wdt_miscdev);
+ unregister_reboot_notifier(&scx200_wdt_notifier);
release_region(scx200_cb_base + SCx200_WDT_OFFSET,
SCx200_WDT_SIZE);
}
diff --git a/drivers/watchdog/shwdt.c b/drivers/watchdog/shwdt.c
index cecbedd473a..61dde863bd4 100644
--- a/drivers/watchdog/shwdt.c
+++ b/drivers/watchdog/shwdt.c
@@ -52,7 +52,7 @@
* overflow periods respectively.
*
* Also, since we can't really expect userspace to be responsive enough
- * before the overflow happens, we maintain two seperate timers .. One in
+ * before the overflow happens, we maintain two separate timers .. One in
* the kernel for clearing out WOVF every 2ms or so (again, this depends on
* HZ == 1000), and another for monitoring userspace writes to the WDT device.
*
diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c
new file mode 100644
index 00000000000..328b3c7211e
--- /dev/null
+++ b/drivers/watchdog/txx9wdt.c
@@ -0,0 +1,276 @@
+/*
+ * txx9wdt: A Hardware Watchdog Driver for TXx9 SoCs
+ *
+ * Copyright (C) 2007 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#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/reboot.h>
+#include <linux/init.h>
+#include <linux/uaccess.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <asm/txx9tmr.h>
+
+#define TIMER_MARGIN 60 /* Default is 60 seconds */
+
+static int timeout = TIMER_MARGIN; /* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. "
+ "(0<timeout<((2^" __MODULE_STRING(TXX9_TIMER_BITS) ")/(IMCLK/256)), "
+ "default=" __MODULE_STRING(TIMER_MARGIN) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started "
+ "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#define WD_TIMER_CCD 7 /* 1/256 */
+#define WD_TIMER_CLK (clk_get_rate(txx9_imclk) / (2 << WD_TIMER_CCD))
+#define WD_MAX_TIMEOUT ((0xffffffff >> (32 - TXX9_TIMER_BITS)) / WD_TIMER_CLK)
+
+static unsigned long txx9wdt_alive;
+static int expect_close;
+static struct txx9_tmr_reg __iomem *txx9wdt_reg;
+static struct clk *txx9_imclk;
+
+static void txx9wdt_ping(void)
+{
+ __raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr);
+}
+
+static void txx9wdt_start(void)
+{
+ __raw_writel(WD_TIMER_CLK * timeout, &txx9wdt_reg->cpra);
+ __raw_writel(WD_TIMER_CCD, &txx9wdt_reg->ccdr);
+ __raw_writel(0, &txx9wdt_reg->tisr); /* clear pending interrupt */
+ __raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG,
+ &txx9wdt_reg->tcr);
+ __raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr);
+}
+
+static void txx9wdt_stop(void)
+{
+ __raw_writel(TXx9_TMWTMR_WDIS, &txx9wdt_reg->wtmr);
+ __raw_writel(__raw_readl(&txx9wdt_reg->tcr) & ~TXx9_TMTCR_TCE,
+ &txx9wdt_reg->tcr);
+}
+
+static int txx9wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &txx9wdt_alive))
+ return -EBUSY;
+
+ if (__raw_readl(&txx9wdt_reg->tcr) & TXx9_TMTCR_TCE) {
+ clear_bit(0, &txx9wdt_alive);
+ return -EBUSY;
+ }
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ txx9wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+static int txx9wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close)
+ txx9wdt_stop();
+ else {
+ printk(KERN_CRIT "txx9wdt: "
+ "Unexpected close, not stopping watchdog!\n");
+ txx9wdt_ping();
+ }
+ clear_bit(0, &txx9wdt_alive);
+ expect_close = 0;
+ return 0;
+}
+
+static ssize_t txx9wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ expect_close = 0;
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 1;
+ }
+ }
+ txx9wdt_ping();
+ }
+ return len;
+}
+
+static int txx9wdt_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_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "Hardware Watchdog for TXx9",
+ };
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ txx9wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (new_timeout < 1 || new_timeout > WD_MAX_TIMEOUT)
+ return -EINVAL;
+ timeout = new_timeout;
+ txx9wdt_stop();
+ txx9wdt_start();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ }
+}
+
+static int txx9wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ txx9wdt_stop();
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations txx9wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = txx9wdt_write,
+ .ioctl = txx9wdt_ioctl,
+ .open = txx9wdt_open,
+ .release = txx9wdt_release,
+};
+
+static struct miscdevice txx9wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &txx9wdt_fops,
+};
+
+static struct notifier_block txx9wdt_notifier = {
+ .notifier_call = txx9wdt_notify_sys
+};
+
+static int __init txx9wdt_probe(struct platform_device *dev)
+{
+ struct resource *res;
+ int ret;
+
+ txx9_imclk = clk_get(NULL, "imbus_clk");
+ if (IS_ERR(txx9_imclk)) {
+ ret = PTR_ERR(txx9_imclk);
+ txx9_imclk = NULL;
+ goto exit;
+ }
+ ret = clk_enable(txx9_imclk);
+ if (ret) {
+ clk_put(txx9_imclk);
+ txx9_imclk = NULL;
+ goto exit;
+ }
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
+ goto exit_busy;
+ if (!devm_request_mem_region(&dev->dev,
+ res->start, res->end - res->start + 1,
+ "txx9wdt"))
+ goto exit_busy;
+ txx9wdt_reg = devm_ioremap(&dev->dev,
+ res->start, res->end - res->start + 1);
+ if (!txx9wdt_reg)
+ goto exit_busy;
+
+ ret = register_reboot_notifier(&txx9wdt_notifier);
+ if (ret)
+ goto exit;
+
+ ret = misc_register(&txx9wdt_miscdev);
+ if (ret) {
+ unregister_reboot_notifier(&txx9wdt_notifier);
+ goto exit;
+ }
+
+ printk(KERN_INFO "Hardware Watchdog Timer for TXx9: "
+ "timeout=%d sec (max %ld) (nowayout= %d)\n",
+ timeout, WD_MAX_TIMEOUT, nowayout);
+
+ return 0;
+exit_busy:
+ ret = -EBUSY;
+exit:
+ if (txx9_imclk) {
+ clk_disable(txx9_imclk);
+ clk_put(txx9_imclk);
+ }
+ return ret;
+}
+
+static int __exit txx9wdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&txx9wdt_miscdev);
+ unregister_reboot_notifier(&txx9wdt_notifier);
+ clk_disable(txx9_imclk);
+ clk_put(txx9_imclk);
+ return 0;
+}
+
+static struct platform_driver txx9wdt_driver = {
+ .remove = __exit_p(txx9wdt_remove),
+ .driver = {
+ .name = "txx9wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init watchdog_init(void)
+{
+ return platform_driver_probe(&txx9wdt_driver, txx9wdt_probe);
+}
+
+static void __exit watchdog_exit(void)
+{
+ platform_driver_unregister(&txx9wdt_driver);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_DESCRIPTION("TXx9 Watchdog Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/watchdog/w83877f_wdt.c b/drivers/watchdog/w83877f_wdt.c
index bcc9d48955d..f510a3a595e 100644
--- a/drivers/watchdog/w83877f_wdt.c
+++ b/drivers/watchdog/w83877f_wdt.c
@@ -373,20 +373,20 @@ static int __init w83877f_wdt_init(void)
goto err_out_region1;
}
- rc = misc_register(&wdt_miscdev);
+ rc = register_reboot_notifier(&wdt_notifier);
if (rc)
{
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
goto err_out_region2;
}
- rc = register_reboot_notifier(&wdt_notifier);
+ rc = misc_register(&wdt_miscdev);
if (rc)
{
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_reboot;
}
printk(KERN_INFO PFX "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
@@ -394,8 +394,8 @@ static int __init w83877f_wdt_init(void)
return 0;
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
+err_out_reboot:
+ unregister_reboot_notifier(&wdt_notifier);
err_out_region2:
release_region(WDT_PING,1);
err_out_region1:
diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c
index b475529d247..b209bcd7f78 100644
--- a/drivers/watchdog/w83977f_wdt.c
+++ b/drivers/watchdog/w83977f_wdt.c
@@ -494,20 +494,20 @@ static int __init w83977f_wdt_init(void)
goto err_out;
}
- rc = misc_register(&wdt_miscdev);
+ rc = register_reboot_notifier(&wdt_notifier);
if (rc)
{
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
goto err_out_region;
}
- rc = register_reboot_notifier(&wdt_notifier);
+ rc = misc_register(&wdt_miscdev);
if (rc)
{
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_reboot;
}
printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
@@ -515,8 +515,8 @@ static int __init w83977f_wdt_init(void)
return 0;
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
+err_out_reboot:
+ unregister_reboot_notifier(&wdt_notifier);
err_out_region:
release_region(IO_INDEX_PORT,2);
err_out:
diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c
index 53d0bb410df..756fb15fdce 100644
--- a/drivers/watchdog/wdt.c
+++ b/drivers/watchdog/wdt.c
@@ -70,6 +70,8 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
static int io=0x240;
static int irq=11;
+static DEFINE_SPINLOCK(wdt_lock);
+
module_param(io, int, 0);
MODULE_PARM_DESC(io, "WDT io port (default=0x240)");
module_param(irq, int, 0);
@@ -109,6 +111,8 @@ static void wdt_ctr_load(int ctr, int val)
static int wdt_start(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
inb_p(WDT_DC); /* Disable watchdog */
wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
@@ -117,6 +121,7 @@ static int wdt_start(void)
wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
wdt_ctr_load(2,65535); /* Length of reset pulse */
outb_p(0, WDT_DC); /* Enable watchdog */
+ spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
@@ -128,9 +133,12 @@ static int wdt_start(void)
static int wdt_stop (void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
/* Turn the card off */
inb_p(WDT_DC); /* Disable watchdog */
wdt_ctr_load(2,0); /* 0 length reset pulses now */
+ spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
@@ -143,11 +151,14 @@ static int wdt_stop (void)
static int wdt_ping(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
/* Write a watchdog value */
inb_p(WDT_DC); /* Disable watchdog */
wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
outb_p(0, WDT_DC); /* Enable watchdog */
+ spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
@@ -182,7 +193,12 @@ static int wdt_set_heartbeat(int t)
static int wdt_get_status(int *status)
{
- unsigned char new_status=inb_p(WDT_SR);
+ unsigned char new_status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdt_lock, flags);
+ new_status = inb_p(WDT_SR);
+ spin_unlock_irqrestore(&wdt_lock, flags);
*status=0;
if (new_status & WDC_SR_ISOI0)
@@ -214,8 +230,12 @@ static int wdt_get_status(int *status)
static int wdt_get_temperature(int *temperature)
{
- unsigned short c=inb_p(WDT_RT);
+ unsigned short c;
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
+ c = inb_p(WDT_RT);
+ spin_unlock_irqrestore(&wdt_lock, flags);
*temperature = (c * 11 / 15) + 7;
return 0;
}
@@ -237,7 +257,10 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id)
* Read the status register see what is up and
* then printk it.
*/
- unsigned char status=inb_p(WDT_SR);
+ unsigned char status;
+
+ spin_lock(&wdt_lock);
+ status = inb_p(WDT_SR);
printk(KERN_CRIT "WDT status %d\n", status);
@@ -265,6 +288,7 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id)
printk(KERN_CRIT "Reset in 5ms.\n");
#endif
}
+ spin_unlock(&wdt_lock);
return IRQ_HANDLED;
}
diff --git a/drivers/watchdog/wdt977.c b/drivers/watchdog/wdt977.c
index 9b7f6b6edef..fb4b876c9fd 100644
--- a/drivers/watchdog/wdt977.c
+++ b/drivers/watchdog/wdt977.c
@@ -470,20 +470,20 @@ static int __init wd977_init(void)
}
}
- rc = misc_register(&wdt977_miscdev);
+ rc = register_reboot_notifier(&wdt977_notifier);
if (rc)
{
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt977_miscdev.minor, rc);
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
goto err_out_region;
}
- rc = register_reboot_notifier(&wdt977_notifier);
+ rc = misc_register(&wdt977_miscdev);
if (rc)
{
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt977_miscdev.minor, rc);
+ goto err_out_reboot;
}
printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
@@ -491,8 +491,8 @@ static int __init wd977_init(void)
return 0;
-err_out_miscdev:
- misc_deregister(&wdt977_miscdev);
+err_out_reboot:
+ unregister_reboot_notifier(&wdt977_notifier);
err_out_region:
if (!machine_is_netwinder())
release_region(IO_INDEX_PORT,2);
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-11 10:25:53 +0000