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-rw-r--r--drivers/char/watchdog/Kconfig7
-rw-r--r--drivers/char/watchdog/Makefile72
-rw-r--r--drivers/char/watchdog/booke_wdt.c192
-rw-r--r--drivers/char/watchdog/ixp2000_wdt.c2
-rw-r--r--drivers/char/watchdog/ixp4xx_wdt.c2
-rw-r--r--drivers/char/watchdog/s3c2410_wdt.c87
-rw-r--r--drivers/char/watchdog/scx200_wdt.c2
-rw-r--r--drivers/char/watchdog/softdog.c13
-rw-r--r--drivers/char/watchdog/w83627hf_wdt.c6
9 files changed, 321 insertions, 62 deletions
diff --git a/drivers/char/watchdog/Kconfig b/drivers/char/watchdog/Kconfig
index b53e2e2b5aee..c3898afce3ae 100644
--- a/drivers/char/watchdog/Kconfig
+++ b/drivers/char/watchdog/Kconfig
@@ -346,6 +346,13 @@ config 8xx_WDT
tristate "MPC8xx Watchdog Timer"
depends on WATCHDOG && 8xx
+config BOOKE_WDT
+ tristate "PowerPC Book-E Watchdog Timer"
+ depends on WATCHDOG && (BOOKE || 4xx)
+ ---help---
+ Please see Documentation/watchdog/watchdog-api.txt for
+ more information.
+
# MIPS Architecture
config INDYDOG
diff --git a/drivers/char/watchdog/Makefile b/drivers/char/watchdog/Makefile
index c1838834ea7f..cfeac6f10137 100644
--- a/drivers/char/watchdog/Makefile
+++ b/drivers/char/watchdog/Makefile
@@ -2,42 +2,68 @@
# Makefile for the WatchDog device drivers.
#
+# Only one watchdog can succeed. We probe the ISA/PCI/USB based
+# watchdog-cards first, then the architecture specific watchdog
+# drivers and then the architecture independant "softdog" driver.
+# This means that if your ISA/PCI/USB card isn't detected that
+# you can fall back to an architecture specific driver and if
+# that also fails then you can fall back to the software watchdog
+# to give you some cover.
+
+# ISA-based Watchdog Cards
obj-$(CONFIG_PCWATCHDOG) += pcwd.o
-obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
-obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
-obj-$(CONFIG_IB700_WDT) += ib700wdt.o
obj-$(CONFIG_MIXCOMWD) += mixcomwd.o
-obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
-obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
obj-$(CONFIG_WDT) += wdt.o
+
+# PCI-based Watchdog Cards
+obj-$(CONFIG_PCIPCWATCHDOG) += pcwd_pci.o
obj-$(CONFIG_WDTPCI) += wdt_pci.o
+
+# USB-based Watchdog Cards
+obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
+
+# ARM Architecture
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
-obj-$(CONFIG_I8XX_TCO) += i8xx_tco.o
-obj-$(CONFIG_MACHZ_WDT) += machzwd.o
-obj-$(CONFIG_SH_WDT) += shwdt.o
+obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
+obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
-obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o
-obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
-obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
-obj-$(CONFIG_SC520_WDT) += sc520_wdt.o
-obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o
+
+# X86 (i386 + ia64 + x86_64) Architecture
+obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
+obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
obj-$(CONFIG_ALIM1535_WDT) += alim1535_wdt.o
-obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
+obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o
+obj-$(CONFIG_SC520_WDT) += sc520_wdt.o
+obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o
+obj-$(CONFIG_IB700_WDT) += ib700wdt.o
obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
+obj-$(CONFIG_I8XX_TCO) += i8xx_tco.o
+obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
+obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
+obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
-obj-$(CONFIG_INDYDOG) += indydog.o
-obj-$(CONFIG_PCIPCWATCHDOG) += pcwd_pci.o
-obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
-obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
-obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
+obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
+obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
+obj-$(CONFIG_MACHZ_WDT) += machzwd.o
+
+# PowerPC Architecture
obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
+
+# PPC64 Architecture
obj-$(CONFIG_WATCHDOG_RTAS) += wdrtas.o
+obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
+
+# MIPS Architecture
+obj-$(CONFIG_INDYDOG) += indydog.o
+
+# S390 Architecture
+
+# SUPERH Architecture
+obj-$(CONFIG_SH_WDT) += shwdt.o
-# Only one watchdog can succeed. We probe the hardware watchdog
-# drivers first, then the softdog driver. This means if your hardware
-# watchdog dies or is 'borrowed' for some reason the software watchdog
-# still gives you some cover.
+# SPARC64 Architecture
+# Architecture Independant
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
diff --git a/drivers/char/watchdog/booke_wdt.c b/drivers/char/watchdog/booke_wdt.c
new file mode 100644
index 000000000000..abc30cca6645
--- /dev/null
+++ b/drivers/char/watchdog/booke_wdt.c
@@ -0,0 +1,192 @@
+/*
+ * drivers/char/watchdog/booke_wdt.c
+ *
+ * Watchdog timer for PowerPC Book-E systems
+ *
+ * Author: Matthew McClintock
+ * Maintainer: Kumar Gala <kumar.gala@freescale.com>
+ *
+ * Copyright 2005 Freescale Semiconductor Inc.
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/notifier.h>
+#include <linux/watchdog.h>
+
+#include <asm/reg_booke.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+/* If the kernel parameter wdt_enable=1, the watchdog will be enabled at boot.
+ * Also, the wdt_period sets the watchdog timer period timeout.
+ * For E500 cpus the wdt_period sets which bit changing from 0->1 will
+ * trigger a watchog timeout. This watchdog timeout will occur 3 times, the
+ * first time nothing will happen, the second time a watchdog exception will
+ * occur, and the final time the board will reset.
+ */
+
+#ifdef CONFIG_FSL_BOOKE
+#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz , reset=~40sec */
+#else
+#define WDT_PERIOD_DEFAULT 4 /* Refer to the PPC40x and PPC4xx manuals */
+#endif /* for timing information */
+
+u32 booke_wdt_enabled = 0;
+u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
+
+#ifdef CONFIG_FSL_BOOKE
+#define WDTP(x) ((((63-x)&0x3)<<30)|(((63-x)&0x3c)<<15))
+#else
+#define WDTP(x) (TCR_WP(x))
+#endif
+
+/*
+ * booke_wdt_enable:
+ */
+static __inline__ void booke_wdt_enable(void)
+{
+ u32 val;
+
+ val = mfspr(SPRN_TCR);
+ val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
+
+ mtspr(SPRN_TCR, val);
+}
+
+/*
+ * booke_wdt_ping:
+ */
+static __inline__ void booke_wdt_ping(void)
+{
+ mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
+}
+
+/*
+ * booke_wdt_write:
+ */
+static ssize_t booke_wdt_write (struct file *file, const char *buf,
+ size_t count, loff_t *ppos)
+{
+ booke_wdt_ping();
+ return count;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .firmware_version = 0,
+ .identity = "PowerPC Book-E Watchdog",
+};
+
+/*
+ * booke_wdt_ioctl:
+ */
+static int booke_wdt_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ u32 tmp = 0;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user ((struct watchdog_info *) arg, &ident,
+ sizeof(struct watchdog_info)))
+ return -EFAULT;
+ case WDIOC_GETSTATUS:
+ return put_user(ident.options, (u32 *) arg);
+ case WDIOC_GETBOOTSTATUS:
+ /* XXX: something is clearing TSR */
+ tmp = mfspr(SPRN_TSR) & TSR_WRS(3);
+ /* returns 1 if last reset was caused by the WDT */
+ return (tmp ? 1 : 0);
+ case WDIOC_KEEPALIVE:
+ booke_wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(booke_wdt_period, (u32 *) arg))
+ return -EFAULT;
+ mtspr(SPRN_TCR, (mfspr(SPRN_TCR)&~WDTP(0))|WDTP(booke_wdt_period));
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(booke_wdt_period, (u32 *) arg);
+ case WDIOC_SETOPTIONS:
+ if (get_user(tmp, (u32 *) arg))
+ return -EINVAL;
+ if (tmp == WDIOS_ENABLECARD) {
+ booke_wdt_ping();
+ break;
+ } else
+ return -EINVAL;
+ return 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return 0;
+}
+/*
+ * booke_wdt_open:
+ */
+static int booke_wdt_open (struct inode *inode, struct file *file)
+{
+ if (booke_wdt_enabled == 0) {
+ booke_wdt_enabled = 1;
+ booke_wdt_enable();
+ printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
+ booke_wdt_period);
+ }
+
+ return 0;
+}
+
+static struct file_operations booke_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = booke_wdt_write,
+ .ioctl = booke_wdt_ioctl,
+ .open = booke_wdt_open,
+};
+
+static struct miscdevice booke_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &booke_wdt_fops,
+};
+
+static void __exit booke_wdt_exit(void)
+{
+ misc_deregister(&booke_wdt_miscdev);
+}
+
+/*
+ * booke_wdt_init:
+ */
+static int __init booke_wdt_init(void)
+{
+ int ret = 0;
+
+ printk (KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
+ ident.firmware_version = cpu_specs[0].pvr_value;
+
+ ret = misc_register(&booke_wdt_miscdev);
+ if (ret) {
+ printk (KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ return ret;
+ }
+
+ if (booke_wdt_enabled == 1) {
+ printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
+ booke_wdt_period);
+ booke_wdt_enable();
+ }
+
+ return ret;
+}
+device_initcall(booke_wdt_init);
diff --git a/drivers/char/watchdog/ixp2000_wdt.c b/drivers/char/watchdog/ixp2000_wdt.c
index e7640bc4904b..0cfb9b9c4a4b 100644
--- a/drivers/char/watchdog/ixp2000_wdt.c
+++ b/drivers/char/watchdog/ixp2000_wdt.c
@@ -182,7 +182,7 @@ static struct file_operations ixp2000_wdt_fops =
static struct miscdevice ixp2000_wdt_miscdev =
{
.minor = WATCHDOG_MINOR,
- .name = "IXP2000 Watchdog",
+ .name = "watchdog",
.fops = &ixp2000_wdt_fops,
};
diff --git a/drivers/char/watchdog/ixp4xx_wdt.c b/drivers/char/watchdog/ixp4xx_wdt.c
index 8d916afbf4fa..b5be8b11104a 100644
--- a/drivers/char/watchdog/ixp4xx_wdt.c
+++ b/drivers/char/watchdog/ixp4xx_wdt.c
@@ -176,7 +176,7 @@ static struct file_operations ixp4xx_wdt_fops =
static struct miscdevice ixp4xx_wdt_miscdev =
{
.minor = WATCHDOG_MINOR,
- .name = "IXP4xx Watchdog",
+ .name = "watchdog",
.fops = &ixp4xx_wdt_fops,
};
diff --git a/drivers/char/watchdog/s3c2410_wdt.c b/drivers/char/watchdog/s3c2410_wdt.c
index f85ac898a49a..8b292bf343c4 100644
--- a/drivers/char/watchdog/s3c2410_wdt.c
+++ b/drivers/char/watchdog/s3c2410_wdt.c
@@ -27,7 +27,10 @@
* Fixed tmr_count / wdt_count confusion
* Added configurable debug
*
- * 11-Jan-2004 BJD Fixed divide-by-2 in timeout code
+ * 11-Jan-2005 BJD Fixed divide-by-2 in timeout code
+ *
+ * 25-Jan-2005 DA Added suspend/resume support
+ * Replaced reboot notifier with .shutdown method
*
* 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
*/
@@ -40,8 +43,6 @@
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/fs.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/interrupt.h>
@@ -317,20 +318,6 @@ static int s3c2410wdt_ioctl(struct inode *inode, struct file *file,
}
}
-/*
- * Notifier for system down
- */
-
-static int s3c2410wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- s3c2410wdt_stop();
- }
- return NOTIFY_DONE;
-}
-
/* kernel interface */
static struct file_operations s3c2410wdt_fops = {
@@ -348,10 +335,6 @@ static struct miscdevice s3c2410wdt_miscdev = {
.fops = &s3c2410wdt_fops,
};
-static struct notifier_block s3c2410wdt_notifier = {
- .notifier_call = s3c2410wdt_notify_sys,
-};
-
/* interrupt handler code */
static irqreturn_t s3c2410wdt_irq(int irqno, void *param,
@@ -432,18 +415,10 @@ static int s3c2410wdt_probe(struct device *dev)
}
}
- ret = register_reboot_notifier(&s3c2410wdt_notifier);
- if (ret) {
- printk (KERN_ERR PFX "cannot register reboot notifier (%d)\n",
- ret);
- return ret;
- }
-
ret = misc_register(&s3c2410wdt_miscdev);
if (ret) {
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (%d)\n",
WATCHDOG_MINOR, ret);
- unregister_reboot_notifier(&s3c2410wdt_notifier);
return ret;
}
@@ -479,15 +454,63 @@ static int s3c2410wdt_remove(struct device *dev)
return 0;
}
+static void s3c2410wdt_shutdown(struct device *dev)
+{
+ s3c2410wdt_stop();
+}
+
+#ifdef CONFIG_PM
+
+static unsigned long wtcon_save;
+static unsigned long wtdat_save;
+
+static int s3c2410wdt_suspend(struct device *dev, u32 state, u32 level)
+{
+ if (level == SUSPEND_POWER_DOWN) {
+ /* Save watchdog state, and turn it off. */
+ wtcon_save = readl(wdt_base + S3C2410_WTCON);
+ wtdat_save = readl(wdt_base + S3C2410_WTDAT);
+
+ /* Note that WTCNT doesn't need to be saved. */
+ s3c2410wdt_stop();
+ }
+
+ return 0;
+}
+
+static int s3c2410wdt_resume(struct device *dev, u32 level)
+{
+ if (level == RESUME_POWER_ON) {
+ /* Restore watchdog state. */
+
+ writel(wtdat_save, wdt_base + S3C2410_WTDAT);
+ writel(wtdat_save, wdt_base + S3C2410_WTCNT); /* Reset count */
+ writel(wtcon_save, wdt_base + S3C2410_WTCON);
+
+ printk(KERN_INFO PFX "watchdog %sabled\n",
+ (wtcon_save & S3C2410_WTCON_ENABLE) ? "en" : "dis");
+ }
+
+ return 0;
+}
+
+#else
+#define s3c2410wdt_suspend NULL
+#define s3c2410wdt_resume NULL
+#endif /* CONFIG_PM */
+
+
static struct device_driver s3c2410wdt_driver = {
.name = "s3c2410-wdt",
.bus = &platform_bus_type,
.probe = s3c2410wdt_probe,
.remove = s3c2410wdt_remove,
+ .shutdown = s3c2410wdt_shutdown,
+ .suspend = s3c2410wdt_suspend,
+ .resume = s3c2410wdt_resume,
};
-
static char banner[] __initdata = KERN_INFO "S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics\n";
static int __init watchdog_init(void)
@@ -499,13 +522,13 @@ static int __init watchdog_init(void)
static void __exit watchdog_exit(void)
{
driver_unregister(&s3c2410wdt_driver);
- unregister_reboot_notifier(&s3c2410wdt_notifier);
}
module_init(watchdog_init);
module_exit(watchdog_exit);
-MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, "
+ "Dimitry Andric <dimitry.andric@tomtom.com>");
MODULE_DESCRIPTION("S3C2410 Watchdog Device Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/char/watchdog/scx200_wdt.c b/drivers/char/watchdog/scx200_wdt.c
index c4568569f3a8..b4a102a2d7e3 100644
--- a/drivers/char/watchdog/scx200_wdt.c
+++ b/drivers/char/watchdog/scx200_wdt.c
@@ -206,7 +206,7 @@ static struct file_operations scx200_wdt_fops = {
static struct miscdevice scx200_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
- .name = NAME,
+ .name = "watchdog",
.fops = &scx200_wdt_fops,
};
diff --git a/drivers/char/watchdog/softdog.c b/drivers/char/watchdog/softdog.c
index 4d7ed931f5c6..20e5eb8667f2 100644
--- a/drivers/char/watchdog/softdog.c
+++ b/drivers/char/watchdog/softdog.c
@@ -77,7 +77,7 @@ static void watchdog_fire(unsigned long);
static struct timer_list watchdog_ticktock =
TIMER_INITIALIZER(watchdog_fire, 0, 0);
-static unsigned long timer_alive;
+static unsigned long driver_open, orphan_timer;
static char expect_close;
@@ -87,6 +87,9 @@ static char expect_close;
static void watchdog_fire(unsigned long data)
{
+ if (test_and_clear_bit(0, &orphan_timer))
+ module_put(THIS_MODULE);
+
if (soft_noboot)
printk(KERN_CRIT PFX "Triggered - Reboot ignored.\n");
else
@@ -128,9 +131,9 @@ static int softdog_set_heartbeat(int t)
static int softdog_open(struct inode *inode, struct file *file)
{
- if(test_and_set_bit(0, &timer_alive))
+ if (test_and_set_bit(0, &driver_open))
return -EBUSY;
- if (nowayout)
+ if (!test_and_clear_bit(0, &orphan_timer))
__module_get(THIS_MODULE);
/*
* Activate timer
@@ -147,11 +150,13 @@ static int softdog_release(struct inode *inode, struct file *file)
*/
if (expect_close == 42) {
softdog_stop();
+ module_put(THIS_MODULE);
} else {
printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ set_bit(0, &orphan_timer);
softdog_keepalive();
}
- clear_bit(0, &timer_alive);
+ clear_bit(0, &driver_open);
expect_close = 0;
return 0;
}
diff --git a/drivers/char/watchdog/w83627hf_wdt.c b/drivers/char/watchdog/w83627hf_wdt.c
index 465e0fd0423d..b5d821015421 100644
--- a/drivers/char/watchdog/w83627hf_wdt.c
+++ b/drivers/char/watchdog/w83627hf_wdt.c
@@ -93,6 +93,12 @@ w83627hf_init(void)
w83627hf_select_wd_register();
+ outb_p(0xF6, WDT_EFER); /* Select CRF6 */
+ t=inb_p(WDT_EFDR); /* read CRF6 */
+ if (t != 0) {
+ printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
+ outb_p(timeout, WDT_EFDR); /* Write back to CRF6 */
+ }
outb_p(0xF5, WDT_EFER); /* Select CRF5 */
t=inb_p(WDT_EFDR); /* read CRF5 */
t&=~0x0C; /* set second mode & disable keyboard turning off watchdog */