# 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
-# 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.
+# MIPS Architecture
+obj-$(CONFIG_INDYDOG) += indydog.o
+
+# S390 Architecture
+
+# SUPERH Architecture
+obj-$(CONFIG_SH_WDT) += shwdt.o
+
+# SPARC64 Architecture
+# Architecture Independant
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
static struct miscdevice ixp2000_wdt_miscdev =
{
.minor = WATCHDOG_MINOR,
- .name = "IXP2000 Watchdog",
+ .name = "watchdog",
.fops = &ixp2000_wdt_fops,
};
static struct miscdevice ixp4xx_wdt_miscdev =
{
.minor = WATCHDOG_MINOR,
- .name = "IXP4xx Watchdog",
+ .name = "watchdog",
.fops = &ixp4xx_wdt_fops,
};
* 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
*/
#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>
}
}
-/*
- * 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 = {
.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,
}
}
- 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;
}
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)
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);
static struct miscdevice scx200_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
- .name = NAME,
+ .name = "watchdog",
.fops = &scx200_wdt_fops,
};
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;
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
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
*/
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;
}
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 */
projects / linux-2.6 / commitdiff