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Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: [WATCHDOG] orion5x_wdt.c: add spinlocking [WATCHDOG] Orion: add hardware watchdog support [WATCHDOG] omap_wdt.c: cleanup a bit omap_wdt.c [WATCHDOG] omap_wdt.c: another ioremap() fix [WATCHDOG] omap_wdt.c: sync linux-omap changes [WATCHDOG] Add AT91SAM9X watchdog [WATCHDOG] Add driver for winbond w83697ug/uf watchdog feature [WATCHDOG] add watchdog driver IT8716 IT8726 IT8712J/K
This commit is contained in:
Linus Torvalds
@@ -157,9 +157,11 @@
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#define CPU_CONF ORION5X_BRIDGE_REG(0x100)
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#define CPU_CTRL ORION5X_BRIDGE_REG(0x104)
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#define CPU_RESET_MASK ORION5X_BRIDGE_REG(0x108)
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#define WDT_RESET 0x0002
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#define CPU_SOFT_RESET ORION5X_BRIDGE_REG(0x10c)
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#define POWER_MNG_CTRL_REG ORION5X_BRIDGE_REG(0x11C)
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#define BRIDGE_CAUSE ORION5X_BRIDGE_REG(0x110)
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#define WDT_INT_REQ 0x0008
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#define BRIDGE_MASK ORION5X_BRIDGE_REG(0x114)
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#define BRIDGE_INT_TIMER0 0x0002
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#define BRIDGE_INT_TIMER1 0x0004
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@@ -441,16 +441,8 @@ static inline void omap_init_uwire(void) {}
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#if defined(CONFIG_OMAP_WATCHDOG) || defined(CONFIG_OMAP_WATCHDOG_MODULE)
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#ifdef CONFIG_ARCH_OMAP24XX
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#define OMAP_WDT_BASE 0x48022000
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#else
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#define OMAP_WDT_BASE 0xfffeb000
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#endif
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static struct resource wdt_resources[] = {
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{
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.start = OMAP_WDT_BASE,
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.end = OMAP_WDT_BASE + 0x4f,
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.flags = IORESOURCE_MEM,
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},
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};
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@@ -464,6 +456,19 @@ static struct platform_device omap_wdt_device = {
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static void omap_init_wdt(void)
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{
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if (cpu_is_omap16xx())
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wdt_resources[0].start = 0xfffeb000;
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else if (cpu_is_omap2420())
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wdt_resources[0].start = 0x48022000; /* WDT2 */
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else if (cpu_is_omap2430())
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wdt_resources[0].start = 0x49016000; /* WDT2 */
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else if (cpu_is_omap343x())
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wdt_resources[0].start = 0x48314000; /* WDT2 */
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else
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return;
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wdt_resources[0].end = wdt_resources[0].start + 0x4f;
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(void) platform_device_register(&omap_wdt_device);
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}
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#else
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@@ -66,6 +66,13 @@ config AT91RM9200_WATCHDOG
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Watchdog timer embedded into AT91RM9200 chips. This will reboot your
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system when the timeout is reached.
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config AT91SAM9X_WATCHDOG
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tristate "AT91SAM9X watchdog"
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depends on WATCHDOG && (ARCH_AT91SAM9260 || ARCH_AT91SAM9261)
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help
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Watchdog timer embedded into AT91SAM9X chips. This will reboot your
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system when the timeout is reached.
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config 21285_WATCHDOG
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tristate "DC21285 watchdog"
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depends on FOOTBRIDGE
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@@ -217,6 +224,15 @@ config DAVINCI_WATCHDOG
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NOTE: once enabled, this timer cannot be disabled.
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Say N if you are unsure.
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config ORION5X_WATCHDOG
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tristate "Orion5x watchdog"
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depends on ARCH_ORION5X
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help
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Say Y here if to include support for the watchdog timer
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in the Orion5x ARM SoCs.
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To compile this driver as a module, choose M here: the
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module will be called orion5x_wdt.
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# ARM26 Architecture
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# AVR32 Architecture
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@@ -416,6 +432,18 @@ config IT8712F_WDT
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To compile this driver as a module, choose M here: the
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module will be called it8712f_wdt.
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config IT87_WDT
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tristate "IT87 Watchdog Timer"
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depends on X86 && EXPERIMENTAL
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---help---
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This is the driver for the hardware watchdog on the ITE IT8716,
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IT8718, IT8726, IT8712(Version J,K) Super I/O chips. This watchdog
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simply watches your kernel to make sure it doesn't freeze, and if
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it does, it reboots your computer after a certain amount of time.
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To compile this driver as a module, choose M here: the module will
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be called it87_wdt.
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config HP_WATCHDOG
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tristate "HP Proliant iLO 2 Hardware Watchdog Timer"
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depends on X86
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@@ -573,6 +601,21 @@ config W83697HF_WDT
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Most people will say N.
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config W83697UG_WDT
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tristate "W83697UG/W83697UF Watchdog Timer"
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depends on X86
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---help---
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This is the driver for the hardware watchdog on the W83697UG/UF
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chipset as used in MSI Fuzzy CX700 VIA motherboards (and likely others).
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This watchdog simply watches your kernel to make sure it doesn't
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freeze, and if it does, it reboots your computer after a certain
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amount of time.
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To compile this driver as a module, choose M here: the
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module will be called w83697ug_wdt.
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Most people will say N.
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config W83877F_WDT
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tristate "W83877F (EMACS) Watchdog Timer"
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depends on X86
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@@ -26,6 +26,7 @@ obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
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# ARM Architecture
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obj-$(CONFIG_AT91RM9200_WATCHDOG) += at91rm9200_wdt.o
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obj-$(CONFIG_AT91SAM9X_WATCHDOG) += at91sam9_wdt.o
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obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
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obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
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obj-$(CONFIG_977_WATCHDOG) += wdt977.o
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@@ -39,6 +40,7 @@ obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
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obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
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obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o
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obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o
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obj-$(CONFIG_ORION5X_WATCHDOG) += orion5x_wdt.o
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# ARM26 Architecture
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@@ -71,6 +73,7 @@ ifeq ($(CONFIG_ITCO_VENDOR_SUPPORT),y)
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obj-$(CONFIG_ITCO_WDT) += iTCO_vendor_support.o
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endif
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obj-$(CONFIG_IT8712F_WDT) += it8712f_wdt.o
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obj-$(CONFIG_IT87_WDT) += it87_wdt.o
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obj-$(CONFIG_HP_WATCHDOG) += hpwdt.o
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obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
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obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
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@@ -83,6 +86,7 @@ obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
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obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
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obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
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obj-$(CONFIG_W83697HF_WDT) += w83697hf_wdt.o
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obj-$(CONFIG_W83697UG_WDT) += w83697ug_wdt.o
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obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
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obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
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obj-$(CONFIG_MACHZ_WDT) += machzwd.o
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@@ -0,0 +1,328 @@
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/*
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* Watchdog driver for Atmel AT91SAM9x processors.
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*
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* Copyright (C) 2008 Renaud CERRATO r.cerrato@til-technologies.fr
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* The Watchdog Timer Mode Register can be only written to once. If the
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* timeout need to be set from Linux, be sure that the bootstrap or the
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* bootloader doesn't write to this register.
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*/
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <linux/watchdog.h>
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#include <linux/jiffies.h>
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#include <linux/timer.h>
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#include <linux/bitops.h>
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#include <linux/uaccess.h>
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#include <asm/arch/at91_wdt.h>
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#define DRV_NAME "AT91SAM9 Watchdog"
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/* AT91SAM9 watchdog runs a 12bit counter @ 256Hz,
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* use this to convert a watchdog
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* value from/to milliseconds.
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*/
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#define ms_to_ticks(t) (((t << 8) / 1000) - 1)
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#define ticks_to_ms(t) (((t + 1) * 1000) >> 8)
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/* Hardware timeout in seconds */
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#define WDT_HW_TIMEOUT 2
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/* Timer heartbeat (500ms) */
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#define WDT_TIMEOUT (HZ/2)
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/* User land timeout */
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#define WDT_HEARTBEAT 15
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static int heartbeat = WDT_HEARTBEAT;
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module_param(heartbeat, int, 0);
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MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
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"(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
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static int nowayout = WATCHDOG_NOWAYOUT;
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module_param(nowayout, int, 0);
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MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
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"(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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static void at91_ping(unsigned long data);
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static struct {
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unsigned long next_heartbeat; /* the next_heartbeat for the timer */
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unsigned long open;
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char expect_close;
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struct timer_list timer; /* The timer that pings the watchdog */
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} at91wdt_private;
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/* ......................................................................... */
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/*
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* Reload the watchdog timer. (ie, pat the watchdog)
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*/
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static inline void at91_wdt_reset(void)
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{
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at91_sys_write(AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
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}
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/*
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* Timer tick
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*/
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static void at91_ping(unsigned long data)
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{
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if (time_before(jiffies, at91wdt_private.next_heartbeat) ||
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(!nowayout && !at91wdt_private.open)) {
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at91_wdt_reset();
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mod_timer(&at91wdt_private.timer, jiffies + WDT_TIMEOUT);
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} else
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printk(KERN_CRIT DRV_NAME": I will reset your machine !\n");
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}
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/*
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* Watchdog device is opened, and watchdog starts running.
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*/
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static int at91_wdt_open(struct inode *inode, struct file *file)
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{
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if (test_and_set_bit(0, &at91wdt_private.open))
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return -EBUSY;
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at91wdt_private.next_heartbeat = jiffies + heartbeat * HZ;
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mod_timer(&at91wdt_private.timer, jiffies + WDT_TIMEOUT);
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return nonseekable_open(inode, file);
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}
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/*
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* Close the watchdog device.
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*/
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static int at91_wdt_close(struct inode *inode, struct file *file)
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{
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clear_bit(0, &at91wdt_private.open);
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/* stop internal ping */
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if (!at91wdt_private.expect_close)
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del_timer(&at91wdt_private.timer);
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at91wdt_private.expect_close = 0;
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return 0;
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}
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/*
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* Set the watchdog time interval in 1/256Hz (write-once)
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* Counter is 12 bit.
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*/
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static int at91_wdt_settimeout(unsigned int timeout)
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{
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unsigned int reg;
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unsigned int mr;
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/* Check if disabled */
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mr = at91_sys_read(AT91_WDT_MR);
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if (mr & AT91_WDT_WDDIS) {
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printk(KERN_ERR DRV_NAME": sorry, watchdog is disabled\n");
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return -EIO;
|
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}
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/*
|
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* All counting occurs at SLOW_CLOCK / 128 = 256 Hz
|
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*
|
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* Since WDV is a 12-bit counter, the maximum period is
|
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* 4096 / 256 = 16 seconds.
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*/
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reg = AT91_WDT_WDRSTEN /* causes watchdog reset */
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/* | AT91_WDT_WDRPROC causes processor reset only */
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| AT91_WDT_WDDBGHLT /* disabled in debug mode */
|
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| AT91_WDT_WDD /* restart at any time */
|
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| (timeout & AT91_WDT_WDV); /* timer value */
|
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at91_sys_write(AT91_WDT_MR, reg);
|
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|
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return 0;
|
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}
|
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|
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static const struct watchdog_info at91_wdt_info = {
|
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.identity = DRV_NAME,
|
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.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
|
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};
|
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|
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/*
|
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* Handle commands from user-space.
|
||||
*/
|
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static long at91_wdt_ioctl(struct file *file,
|
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unsigned int cmd, unsigned long arg)
|
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{
|
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void __user *argp = (void __user *)arg;
|
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int __user *p = argp;
|
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int new_value;
|
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|
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switch (cmd) {
|
||||
case WDIOC_GETSUPPORT:
|
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return copy_to_user(argp, &at91_wdt_info,
|
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sizeof(at91_wdt_info)) ? -EFAULT : 0;
|
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|
||||
case WDIOC_GETSTATUS:
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
return put_user(0, p);
|
||||
|
||||
case WDIOC_KEEPALIVE:
|
||||
at91wdt_private.next_heartbeat = jiffies + heartbeat * HZ;
|
||||
return 0;
|
||||
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(new_value, p))
|
||||
return -EFAULT;
|
||||
|
||||
heartbeat = new_value;
|
||||
at91wdt_private.next_heartbeat = jiffies + heartbeat * HZ;
|
||||
|
||||
return put_user(new_value, p); /* return current value */
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
return put_user(heartbeat, p);
|
||||
}
|
||||
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)
|
||||
{
|
||||
if (!len)
|
||||
return 0;
|
||||
|
||||
/* Scan for magic character */
|
||||
if (!nowayout) {
|
||||
size_t i;
|
||||
|
||||
at91wdt_private.expect_close = 0;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
char c;
|
||||
if (get_user(c, data + i))
|
||||
return -EFAULT;
|
||||
if (c == 'V') {
|
||||
at91wdt_private.expect_close = 42;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
at91wdt_private.next_heartbeat = jiffies + heartbeat * HZ;
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
/* ......................................................................... */
|
||||
|
||||
static const struct file_operations at91wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.unlocked_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.parent)
|
||||
return -EBUSY;
|
||||
at91wdt_miscdev.parent = &pdev->dev;
|
||||
|
||||
/* Set watchdog */
|
||||
res = at91_wdt_settimeout(ms_to_ticks(WDT_HW_TIMEOUT * 1000));
|
||||
if (res)
|
||||
return res;
|
||||
|
||||
res = misc_register(&at91wdt_miscdev);
|
||||
if (res)
|
||||
return res;
|
||||
|
||||
at91wdt_private.next_heartbeat = jiffies + heartbeat * HZ;
|
||||
setup_timer(&at91wdt_private.timer, at91_ping, 0);
|
||||
mod_timer(&at91wdt_private.timer, jiffies + WDT_TIMEOUT);
|
||||
|
||||
printk(KERN_INFO DRV_NAME " enabled (heartbeat=%d sec, nowayout=%d)\n",
|
||||
heartbeat, nowayout);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __exit at91wdt_remove(struct platform_device *pdev)
|
||||
{
|
||||
int res;
|
||||
|
||||
res = misc_deregister(&at91wdt_miscdev);
|
||||
if (!res)
|
||||
at91wdt_miscdev.parent = NULL;
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
|
||||
static int at91wdt_suspend(struct platform_device *pdev, pm_message_t message)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int at91wdt_resume(struct platform_device *pdev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
#define at91wdt_suspend NULL
|
||||
#define at91wdt_resume NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver at91wdt_driver = {
|
||||
.remove = __exit_p(at91wdt_remove),
|
||||
.suspend = at91wdt_suspend,
|
||||
.resume = at91wdt_resume,
|
||||
.driver = {
|
||||
.name = "at91_wdt",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init at91sam_wdt_init(void)
|
||||
{
|
||||
return platform_driver_probe(&at91wdt_driver, at91wdt_probe);
|
||||
}
|
||||
|
||||
static void __exit at91sam_wdt_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&at91wdt_driver);
|
||||
}
|
||||
|
||||
module_init(at91sam_wdt_init);
|
||||
module_exit(at91sam_wdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Renaud CERRATO <r.cerrato@til-technologies.fr>");
|
||||
MODULE_DESCRIPTION("Watchdog driver for Atmel AT91SAM9x processors");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
File diff suppressed because it is too large
Load Diff
+226
-115
File diff suppressed because it is too large
Load Diff
@@ -30,25 +30,15 @@
|
||||
#ifndef _OMAP_WATCHDOG_H
|
||||
#define _OMAP_WATCHDOG_H
|
||||
|
||||
#define OMAP1610_WATCHDOG_BASE 0xfffeb000
|
||||
#define OMAP2420_WATCHDOG_BASE 0x48022000 /*WDT Timer 2 */
|
||||
|
||||
#ifdef CONFIG_ARCH_OMAP24XX
|
||||
#define OMAP_WATCHDOG_BASE OMAP2420_WATCHDOG_BASE
|
||||
#else
|
||||
#define OMAP_WATCHDOG_BASE OMAP1610_WATCHDOG_BASE
|
||||
#define RM_RSTST_WKUP 0
|
||||
#endif
|
||||
|
||||
#define OMAP_WATCHDOG_REV (OMAP_WATCHDOG_BASE + 0x00)
|
||||
#define OMAP_WATCHDOG_SYS_CONFIG (OMAP_WATCHDOG_BASE + 0x10)
|
||||
#define OMAP_WATCHDOG_STATUS (OMAP_WATCHDOG_BASE + 0x14)
|
||||
#define OMAP_WATCHDOG_CNTRL (OMAP_WATCHDOG_BASE + 0x24)
|
||||
#define OMAP_WATCHDOG_CRR (OMAP_WATCHDOG_BASE + 0x28)
|
||||
#define OMAP_WATCHDOG_LDR (OMAP_WATCHDOG_BASE + 0x2c)
|
||||
#define OMAP_WATCHDOG_TGR (OMAP_WATCHDOG_BASE + 0x30)
|
||||
#define OMAP_WATCHDOG_WPS (OMAP_WATCHDOG_BASE + 0x34)
|
||||
#define OMAP_WATCHDOG_SPR (OMAP_WATCHDOG_BASE + 0x48)
|
||||
#define OMAP_WATCHDOG_REV (0x00)
|
||||
#define OMAP_WATCHDOG_SYS_CONFIG (0x10)
|
||||
#define OMAP_WATCHDOG_STATUS (0x14)
|
||||
#define OMAP_WATCHDOG_CNTRL (0x24)
|
||||
#define OMAP_WATCHDOG_CRR (0x28)
|
||||
#define OMAP_WATCHDOG_LDR (0x2c)
|
||||
#define OMAP_WATCHDOG_TGR (0x30)
|
||||
#define OMAP_WATCHDOG_WPS (0x34)
|
||||
#define OMAP_WATCHDOG_SPR (0x48)
|
||||
|
||||
/* Using the prescaler, the OMAP watchdog could go for many
|
||||
* months before firing. These limits work without scaling,
|
||||
|
||||
@@ -0,0 +1,245 @@
|
||||
/*
|
||||
* drivers/watchdog/orion5x_wdt.c
|
||||
*
|
||||
* Watchdog driver for Orion5x processors
|
||||
*
|
||||
* Author: Sylver Bruneau <sylver.bruneau@googlemail.com>
|
||||
*
|
||||
* This file is licensed under the terms of the GNU General Public
|
||||
* License version 2. This program is licensed "as is" without any
|
||||
* warranty of any kind, whether express or implied.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/watchdog.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
/*
|
||||
* Watchdog timer block registers.
|
||||
*/
|
||||
#define TIMER_CTRL (TIMER_VIRT_BASE + 0x0000)
|
||||
#define WDT_EN 0x0010
|
||||
#define WDT_VAL (TIMER_VIRT_BASE + 0x0024)
|
||||
|
||||
#define WDT_MAX_DURATION (0xffffffff / ORION5X_TCLK)
|
||||
#define WDT_IN_USE 0
|
||||
#define WDT_OK_TO_CLOSE 1
|
||||
|
||||
static int nowayout = WATCHDOG_NOWAYOUT;
|
||||
static int heartbeat = WDT_MAX_DURATION; /* (seconds) */
|
||||
static unsigned long wdt_status;
|
||||
static spinlock_t wdt_lock;
|
||||
|
||||
static void wdt_enable(void)
|
||||
{
|
||||
u32 reg;
|
||||
|
||||
spin_lock(&wdt_lock);
|
||||
|
||||
/* Set watchdog duration */
|
||||
writel(ORION5X_TCLK * heartbeat, WDT_VAL);
|
||||
|
||||
/* Clear watchdog timer interrupt */
|
||||
reg = readl(BRIDGE_CAUSE);
|
||||
reg &= ~WDT_INT_REQ;
|
||||
writel(reg, BRIDGE_CAUSE);
|
||||
|
||||
/* Enable watchdog timer */
|
||||
reg = readl(TIMER_CTRL);
|
||||
reg |= WDT_EN;
|
||||
writel(reg, TIMER_CTRL);
|
||||
|
||||
/* Enable reset on watchdog */
|
||||
reg = readl(CPU_RESET_MASK);
|
||||
reg |= WDT_RESET;
|
||||
writel(reg, CPU_RESET_MASK);
|
||||
|
||||
spin_unlock(&wdt_lock);
|
||||
}
|
||||
|
||||
static void wdt_disable(void)
|
||||
{
|
||||
u32 reg;
|
||||
|
||||
spin_lock(&wdt_lock);
|
||||
|
||||
/* Disable reset on watchdog */
|
||||
reg = readl(CPU_RESET_MASK);
|
||||
reg &= ~WDT_RESET;
|
||||
writel(reg, CPU_RESET_MASK);
|
||||
|
||||
/* Disable watchdog timer */
|
||||
reg = readl(TIMER_CTRL);
|
||||
reg &= ~WDT_EN;
|
||||
writel(reg, TIMER_CTRL);
|
||||
|
||||
spin_unlock(&wdt_lock);
|
||||
}
|
||||
|
||||
static int orion5x_wdt_get_timeleft(int *time_left)
|
||||
{
|
||||
spin_lock(&wdt_lock);
|
||||
*time_left = readl(WDT_VAL) / ORION5X_TCLK;
|
||||
spin_unlock(&wdt_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int orion5x_wdt_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
if (test_and_set_bit(WDT_IN_USE, &wdt_status))
|
||||
return -EBUSY;
|
||||
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
||||
wdt_enable();
|
||||
return nonseekable_open(inode, file);
|
||||
}
|
||||
|
||||
static ssize_t orion5x_wdt_write(struct file *file, const char *data,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
if (len) {
|
||||
if (!nowayout) {
|
||||
size_t i;
|
||||
|
||||
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
||||
for (i = 0; i != len; i++) {
|
||||
char c;
|
||||
|
||||
if (get_user(c, data + i))
|
||||
return -EFAULT;
|
||||
if (c == 'V')
|
||||
set_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
||||
}
|
||||
}
|
||||
wdt_enable();
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
static struct watchdog_info ident = {
|
||||
.options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
|
||||
WDIOF_KEEPALIVEPING,
|
||||
.identity = "Orion5x Watchdog",
|
||||
};
|
||||
|
||||
|
||||
static long orion5x_wdt_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
int ret = -ENOTTY;
|
||||
int time;
|
||||
|
||||
switch (cmd) {
|
||||
case WDIOC_GETSUPPORT:
|
||||
ret = copy_to_user((struct watchdog_info *)arg, &ident,
|
||||
sizeof(ident)) ? -EFAULT : 0;
|
||||
break;
|
||||
|
||||
case WDIOC_GETSTATUS:
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
ret = put_user(0, (int *)arg);
|
||||
break;
|
||||
|
||||
case WDIOC_KEEPALIVE:
|
||||
wdt_enable();
|
||||
ret = 0;
|
||||
break;
|
||||
|
||||
case WDIOC_SETTIMEOUT:
|
||||
ret = get_user(time, (int *)arg);
|
||||
if (ret)
|
||||
break;
|
||||
|
||||
if (time <= 0 || time > WDT_MAX_DURATION) {
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
heartbeat = time;
|
||||
wdt_enable();
|
||||
/* Fall through */
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
ret = put_user(heartbeat, (int *)arg);
|
||||
break;
|
||||
|
||||
case WDIOC_GETTIMELEFT:
|
||||
if (orion5x_wdt_get_timeleft(&time)) {
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
ret = put_user(time, (int *)arg);
|
||||
break;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int orion5x_wdt_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
|
||||
wdt_disable();
|
||||
else
|
||||
printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
|
||||
"timer will not stop\n");
|
||||
clear_bit(WDT_IN_USE, &wdt_status);
|
||||
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static const struct file_operations orion5x_wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.write = orion5x_wdt_write,
|
||||
.unlocked_ioctl = orion5x_wdt_ioctl,
|
||||
.open = orion5x_wdt_open,
|
||||
.release = orion5x_wdt_release,
|
||||
};
|
||||
|
||||
static struct miscdevice orion5x_wdt_miscdev = {
|
||||
.minor = WATCHDOG_MINOR,
|
||||
.name = "watchdog",
|
||||
.fops = &orion5x_wdt_fops,
|
||||
};
|
||||
|
||||
static int __init orion5x_wdt_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
spin_lock_init(&wdt_lock);
|
||||
|
||||
ret = misc_register(&orion5x_wdt_miscdev);
|
||||
if (ret == 0)
|
||||
printk("Orion5x Watchdog Timer: heartbeat %d sec\n",
|
||||
heartbeat);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit orion5x_wdt_exit(void)
|
||||
{
|
||||
misc_deregister(&orion5x_wdt_miscdev);
|
||||
}
|
||||
|
||||
module_init(orion5x_wdt_init);
|
||||
module_exit(orion5x_wdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Sylver Bruneau <sylver.bruneau@googlemail.com>");
|
||||
MODULE_DESCRIPTION("Orion5x Processor Watchdog");
|
||||
|
||||
module_param(heartbeat, int, 0);
|
||||
MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default is "
|
||||
__MODULE_STRING(WDT_MAX_DURATION) ")");
|
||||
|
||||
module_param(nowayout, int, 0);
|
||||
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
@@ -0,0 +1,392 @@
|
||||
/*
|
||||
* w83697ug/uf WDT driver
|
||||
*
|
||||
* (c) Copyright 2008 Flemming Fransen <ff@nrvissing.net>
|
||||
* reused original code to supoprt w83697ug/uf.
|
||||
*
|
||||
* Based on w83627hf_wdt.c which is based on advantechwdt.c
|
||||
* which is based on wdt.c.
|
||||
* Original copyright messages:
|
||||
*
|
||||
* (c) Copyright 2007 Vlad Drukker <vlad@storewiz.com>
|
||||
* added support for W83627THF.
|
||||
*
|
||||
* (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 Alan Cox nor CymruNet Ltd. admit liability nor provide
|
||||
* warranty for any of this software. This material is provided
|
||||
* "AS-IS" and at no charge.
|
||||
*
|
||||
* (c) Copyright 1995 Alan Cox <alan@redhat.com>
|
||||
*/
|
||||
|
||||
#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 <linux/io.h>
|
||||
#include <linux/uaccess.h>
|
||||
|
||||
#include <asm/system.h>
|
||||
|
||||
#define WATCHDOG_NAME "w83697ug/uf WDT"
|
||||
#define PFX WATCHDOG_NAME ": "
|
||||
#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
|
||||
|
||||
static unsigned long wdt_is_open;
|
||||
static char expect_close;
|
||||
static DEFINE_SPINLOCK(io_lock);
|
||||
|
||||
static int wdt_io = 0x2e;
|
||||
module_param(wdt_io, int, 0);
|
||||
MODULE_PARM_DESC(wdt_io, "w83697ug/uf WDT io port (default 0x2e)");
|
||||
|
||||
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="
|
||||
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
||||
|
||||
/*
|
||||
* Kernel methods.
|
||||
*/
|
||||
|
||||
#define WDT_EFER (wdt_io+0) /* Extended Function Enable Registers */
|
||||
#define WDT_EFIR (wdt_io+0) /* Extended Function Index Register
|
||||
(same as EFER) */
|
||||
#define WDT_EFDR (WDT_EFIR+1) /* Extended Function Data Register */
|
||||
|
||||
static void w83697ug_select_wd_register(void)
|
||||
{
|
||||
unsigned char c;
|
||||
unsigned char version;
|
||||
|
||||
outb_p(0x87, WDT_EFER); /* Enter extended function mode */
|
||||
outb_p(0x87, WDT_EFER); /* Again according to manual */
|
||||
|
||||
outb(0x20, WDT_EFER); /* check chip version */
|
||||
version = inb(WDT_EFDR);
|
||||
|
||||
if (version == 0x68) { /* W83697UG */
|
||||
printk(KERN_INFO PFX "Watchdog chip version 0x%02x = "
|
||||
"W83697UG/UF found at 0x%04x\n", version, wdt_io);
|
||||
|
||||
outb_p(0x2b, WDT_EFER);
|
||||
c = inb_p(WDT_EFDR); /* select WDT0 */
|
||||
c &= ~0x04;
|
||||
outb_p(0x2b, WDT_EFER);
|
||||
outb_p(c, WDT_EFDR); /* set pin118 to WDT0 */
|
||||
|
||||
} else {
|
||||
printk(KERN_ERR PFX "No W83697UG/UF could be found\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
outb_p(0x07, WDT_EFER); /* point to logical device number reg */
|
||||
outb_p(0x08, WDT_EFDR); /* select logical device 8 (GPIO2) */
|
||||
outb_p(0x30, WDT_EFER); /* select CR30 */
|
||||
c = inb_p(WDT_EFDR);
|
||||
outb_p(c || 0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
|
||||
}
|
||||
|
||||
static void w83697ug_unselect_wd_register(void)
|
||||
{
|
||||
outb_p(0xAA, WDT_EFER); /* Leave extended function mode */
|
||||
}
|
||||
|
||||
static void w83697ug_init(void)
|
||||
{
|
||||
unsigned char t;
|
||||
|
||||
w83697ug_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 */
|
||||
outb_p(t, WDT_EFDR); /* Write back to CRF5 */
|
||||
|
||||
w83697ug_unselect_wd_register();
|
||||
}
|
||||
|
||||
static void wdt_ctrl(int timeout)
|
||||
{
|
||||
spin_lock(&io_lock);
|
||||
|
||||
w83697ug_select_wd_register();
|
||||
|
||||
outb_p(0xF4, WDT_EFER); /* Select CRF4 */
|
||||
outb_p(timeout, WDT_EFDR); /* Write Timeout counter to CRF4 */
|
||||
|
||||
w83697ug_unselect_wd_register();
|
||||
|
||||
spin_unlock(&io_lock);
|
||||
}
|
||||
|
||||
static int wdt_ping(void)
|
||||
{
|
||||
wdt_ctrl(timeout);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int wdt_disable(void)
|
||||
{
|
||||
wdt_ctrl(0);
|
||||
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 long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
void __user *argp = (void __user *)arg;
|
||||
int __user *p = argp;
|
||||
int new_timeout;
|
||||
static const struct watchdog_info ident = {
|
||||
.options = WDIOF_KEEPALIVEPING |
|
||||
WDIOF_SETTIMEOUT |
|
||||
WDIOF_MAGICCLOSE,
|
||||
.firmware_version = 1,
|
||||
.identity = "W83697UG 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_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_ping();
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
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_ping();
|
||||
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)
|
||||
wdt_disable(); /* Turn the WDT off */
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
/*
|
||||
* Kernel Interfaces
|
||||
*/
|
||||
|
||||
static const struct file_operations wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.write = wdt_write,
|
||||
.unlocked_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 __init wdt_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
printk(KERN_INFO "WDT driver for the Winbond(TM) W83697UG/UF Super I/O chip initialising.\n");
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
if (!request_region(wdt_io, 1, WATCHDOG_NAME)) {
|
||||
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
|
||||
wdt_io);
|
||||
ret = -EIO;
|
||||
goto out;
|
||||
}
|
||||
|
||||
w83697ug_init();
|
||||
|
||||
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, 1);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void __exit wdt_exit(void)
|
||||
{
|
||||
misc_deregister(&wdt_miscdev);
|
||||
unregister_reboot_notifier(&wdt_notifier);
|
||||
release_region(wdt_io, 1);
|
||||
}
|
||||
|
||||
module_init(wdt_init);
|
||||
module_exit(wdt_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Flemming Frandsen <ff@nrvissing.net>");
|
||||
MODULE_DESCRIPTION("w83697ug/uf WDT driver");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
Reference in New Issue
Block a user