提交 9ef38eaf 编写于 作者: L Linus Torvalds

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] HP ProLiant WatchDog driver
  [WATCHDOG] blackfin Watchdog driver: relocate all strings used in __init functions to __initdata
  [WATCHDOG] Convert mtx1 wdt to be a platform device and use generic GPIO API
  [WATCHDOG] Add support for SB1 hardware watchdog
......@@ -402,6 +402,18 @@ config IT8712F_WDT
To compile this driver as a module, choose M here: the
module will be called it8712f_wdt.
config HP_WATCHDOG
tristate "HP Proliant iLO 2 Hardware Watchdog Timer"
depends on X86
help
A software monitoring watchdog and NMI sourcing driver. This driver
will detect lockups and provide stack trace. Also, when an NMI
occurs this driver will make the necessary BIOS calls to log
the cause of the NMI. This is a driver that will only load on a
HP ProLiant system with a minimum of iLO2 support.
To compile this driver as a module, choose M here: the
module will be called hpwdt.
config SC1200_WDT
tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
depends on X86
......@@ -633,6 +645,19 @@ config WDT_RM9K_GPI
To compile this driver as a module, choose M here: the
module will be called rm9k_wdt.
config SIBYTE_WDOG
tristate "Sibyte SoC hardware watchdog"
depends on CPU_SB1
help
Watchdog driver for the built in watchdog hardware in Sibyte
SoC processors. There are apparently two watchdog timers
on such processors; this driver supports only the first one,
because currently Linux only supports exporting one watchdog
to userspace.
To compile this driver as a loadable module, choose M here.
The module will be called sb_wdog.
config AR7_WDT
tristate "TI AR7 Watchdog Timer"
depends on AR7
......
......@@ -67,6 +67,7 @@ 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-$(CONFIG_HP_WATCHDOG) += hpwdt.o
obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
......@@ -92,6 +93,7 @@ obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
obj-$(CONFIG_INDYDOG) += indydog.o
obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
......
......@@ -29,6 +29,7 @@
#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
#define stampit() stamp("here i am")
#define pr_init(fmt, args...) ({ static const __initdata char __fmt[] = fmt; printk(__fmt, ## args); })
#define WATCHDOG_NAME "bfin-wdt"
#define PFX WATCHDOG_NAME ": "
......@@ -445,19 +446,19 @@ static int __init bfin_wdt_init(void)
ret = register_reboot_notifier(&bfin_wdt_notifier);
if (ret) {
printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
pr_init(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
return ret;
}
ret = misc_register(&bfin_wdt_miscdev);
if (ret) {
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
pr_init(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
unregister_reboot_notifier(&bfin_wdt_notifier);
return ret;
}
printk(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
pr_init(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
return 0;
......
此差异已折叠。
......@@ -45,10 +45,13 @@
#include <linux/completion.h>
#include <linux/jiffies.h>
#include <linux/watchdog.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/gpio.h>
#define MTX1_WDT_INTERVAL (5 * HZ)
......@@ -61,6 +64,7 @@ static struct {
volatile int queue;
int default_ticks;
unsigned long inuse;
unsigned gpio;
} mtx1_wdt_device;
static void mtx1_wdt_trigger(unsigned long unused)
......@@ -73,7 +77,8 @@ static void mtx1_wdt_trigger(unsigned long unused)
* toggle GPIO2_15
*/
tmp = au_readl(GPIO2_DIR);
tmp = (tmp & ~(1<<15)) | ((~tmp) & (1<<15));
tmp = (tmp & ~(1 << mtx1_wdt_device.gpio)) |
((~tmp) & (1 << mtx1_wdt_device.gpio));
au_writel (tmp, GPIO2_DIR);
if (mtx1_wdt_device.queue && ticks)
......@@ -93,7 +98,7 @@ static void mtx1_wdt_start(void)
{
if (!mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 1;
au_writel (au_readl(GPIO2_DIR) | (u32)(1<<15), GPIO2_DIR);
gpio_set_value(mtx1_wdt_device.gpio, 1);
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
}
mtx1_wdt_device.running++;
......@@ -103,7 +108,7 @@ static int mtx1_wdt_stop(void)
{
if (mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 0;
au_writel (au_readl(GPIO2_DIR) & ~((u32)(1<<15)), GPIO2_DIR);
gpio_set_value(mtx1_wdt_device.gpio, 0);
}
ticks = mtx1_wdt_device.default_ticks;
......@@ -197,10 +202,12 @@ static struct miscdevice mtx1_wdt_misc = {
};
static int __init mtx1_wdt_init(void)
static int mtx1_wdt_probe(struct platform_device *pdev)
{
int ret;
mtx1_wdt_device.gpio = pdev->resource[0].start;
if ((ret = misc_register(&mtx1_wdt_misc)) < 0) {
printk(KERN_ERR " mtx-1_wdt : failed to register\n");
return ret;
......@@ -222,13 +229,30 @@ static int __init mtx1_wdt_init(void)
return 0;
}
static void __exit mtx1_wdt_exit(void)
static int mtx1_wdt_remove(struct platform_device *pdev)
{
if (mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 0;
wait_for_completion(&mtx1_wdt_device.stop);
}
misc_deregister(&mtx1_wdt_misc);
return 0;
}
static struct platform_driver mtx1_wdt = {
.probe = mtx1_wdt_probe,
.remove = mtx1_wdt_remove,
.driver.name = "mtx1-wdt",
};
static int __init mtx1_wdt_init(void)
{
return platform_driver_register(&mtx1_wdt);
}
static void __exit mtx1_wdt_exit(void)
{
platform_driver_unregister(&mtx1_wdt);
}
module_init(mtx1_wdt_init);
......@@ -237,3 +261,4 @@ module_exit(mtx1_wdt_exit);
MODULE_AUTHOR("Michael Stickel, Florian Fainelli");
MODULE_DESCRIPTION("Driver for the MTX-1 watchdog");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
/*
* Watchdog driver for SiByte SB1 SoCs
*
* Copyright (C) 2007 OnStor, Inc. * Andrew Sharp <andy.sharp@onstor.com>
*
* This driver is intended to make the second of two hardware watchdogs
* on the Sibyte 12XX and 11XX SoCs available to the user. There are two
* such devices available on the SoC, but it seems that there isn't an
* enumeration class for watchdogs in Linux like there is for RTCs.
* The second is used rather than the first because it uses IRQ 1,
* thereby avoiding all that IRQ 0 problematic nonsense.
*
* I have not tried this driver on a 1480 processor; it might work
* just well enough to really screw things up.
*
* It is a simple timer, and there is an interrupt that is raised the
* first time the timer expires. The second time it expires, the chip
* is reset and there is no way to redirect that NMI. Which could
* be problematic in some cases where this chip is sitting on the HT
* bus and has just taken responsibility for providing a cache block.
* Since the reset can't be redirected to the external reset pin, it is
* possible that other HT connected processors might hang and not reset.
* For Linux, a soft reset would probably be even worse than a hard reset.
* There you have it.
*
* The timer takes 23 bits of a 64 bit register (?) as a count value,
* and decrements the count every microsecond, for a max value of
* 0x7fffff usec or about 8.3ish seconds.
*
* This watchdog borrows some user semantics from the softdog driver,
* in that if you close the fd, it leaves the watchdog running, unless
* you previously wrote a 'V' to the fd, in which case it disables
* the watchdog when you close the fd like some other drivers.
*
* Based on various other watchdog drivers, which are probably all
* loosely based on something Alan Cox wrote years ago.
*
* (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
* version 1 or 2 as published by the Free Software Foundation.
*
*/
#include <linux/module.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/reboot.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/interrupt.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/sb1250_regs.h>
#include <asm/sibyte/sb1250_int.h>
#include <asm/sibyte/sb1250_scd.h>
/*
* set the initial count value of a timer
*
* wdog is the iomem address of the cfg register
*/
void sbwdog_set(char __iomem *wdog, unsigned long t)
{
__raw_writeb(0, wdog - 0x10);
__raw_writeq(t & 0x7fffffUL, wdog);
}
/*
* cause the timer to [re]load it's initial count and start counting
* all over again
*
* wdog is the iomem address of the cfg register
*/
void sbwdog_pet(char __iomem *wdog)
{
__raw_writeb(__raw_readb(wdog) | 1, wdog);
}
static unsigned long sbwdog_gate; /* keeps it to one thread only */
static char __iomem *kern_dog = (char __iomem *)(IO_BASE + (A_SCD_WDOG_CFG_0));
static char __iomem *user_dog = (char __iomem *)(IO_BASE + (A_SCD_WDOG_CFG_1));
static unsigned long timeout = 0x7fffffUL; /* useconds: 8.3ish secs. */
static int expect_close;
static struct watchdog_info ident = {
.options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
.identity = "SiByte Watchdog",
};
/*
* Allow only a single thread to walk the dog
*/
static int sbwdog_open(struct inode *inode, struct file *file)
{
nonseekable_open(inode, file);
if (test_and_set_bit(0, &sbwdog_gate)) {
return -EBUSY;
}
__module_get(THIS_MODULE);
/*
* Activate the timer
*/
sbwdog_set(user_dog, timeout);
__raw_writeb(1, user_dog);
return 0;
}
/*
* Put the dog back in the kennel.
*/
static int sbwdog_release(struct inode *inode, struct file *file)
{
if (expect_close == 42) {
__raw_writeb(0, user_dog);
module_put(THIS_MODULE);
} else {
printk(KERN_CRIT "%s: Unexpected close, not stopping watchdog!\n",
ident.identity);
sbwdog_pet(user_dog);
}
clear_bit(0, &sbwdog_gate);
expect_close = 0;
return 0;
}
/*
* 42 - the answer
*/
static ssize_t sbwdog_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
int i;
if (len) {
/*
* restart the timer
*/
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;
}
}
sbwdog_pet(user_dog);
}
return len;
}
static int sbwdog_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int ret = -ENOTTY;
unsigned long time;
void __user *argp = (void __user *)arg;
int __user *p = argp;
switch (cmd) {
case WDIOC_GETSUPPORT:
ret = copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
ret = put_user(0, p);
break;
case WDIOC_SETTIMEOUT:
ret = get_user(time, p);
if (ret) {
break;
}
time *= 1000000;
if (time > 0x7fffffUL) {
ret = -EINVAL;
break;
}
timeout = time;
sbwdog_set(user_dog, timeout);
sbwdog_pet(user_dog);
case WDIOC_GETTIMEOUT:
/*
* get the remaining count from the ... count register
* which is 1*8 before the config register
*/
ret = put_user(__raw_readq(user_dog - 8) / 1000000, p);
break;
case WDIOC_KEEPALIVE:
sbwdog_pet(user_dog);
ret = 0;
break;
}
return ret;
}
/*
* Notifier for system down
*/
static int
sbwdog_notify_sys(struct notifier_block *this, unsigned long code, void *erf)
{
if (code == SYS_DOWN || code == SYS_HALT) {
/*
* sit and sit
*/
__raw_writeb(0, user_dog);
__raw_writeb(0, kern_dog);
}
return NOTIFY_DONE;
}
static const struct file_operations sbwdog_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = sbwdog_write,
.ioctl = sbwdog_ioctl,
.open = sbwdog_open,
.release = sbwdog_release,
};
static struct miscdevice sbwdog_miscdev =
{
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &sbwdog_fops,
};
static struct notifier_block sbwdog_notifier = {
.notifier_call = sbwdog_notify_sys,
};
/*
* interrupt handler
*
* doesn't do a whole lot for user, but oh so cleverly written so kernel
* code can use it to re-up the watchdog, thereby saving the kernel from
* having to create and maintain a timer, just to tickle another timer,
* which is just so wrong.
*/
irqreturn_t sbwdog_interrupt(int irq, void *addr)
{
unsigned long wd_init;
char *wd_cfg_reg = (char *)addr;
u8 cfg;
cfg = __raw_readb(wd_cfg_reg);
wd_init = __raw_readq(wd_cfg_reg - 8) & 0x7fffff;
/*
* if it's the second watchdog timer, it's for those users
*/
if (wd_cfg_reg == user_dog) {
printk(KERN_CRIT
"%s in danger of initiating system reset in %ld.%01ld seconds\n",
ident.identity, wd_init / 1000000, (wd_init / 100000) % 10);
} else {
cfg |= 1;
}
__raw_writeb(cfg, wd_cfg_reg);
return IRQ_HANDLED;
}
static int __init sbwdog_init(void)
{
int ret;
/*
* register a reboot notifier
*/
ret = register_reboot_notifier(&sbwdog_notifier);
if (ret) {
printk (KERN_ERR "%s: cannot register reboot notifier (err=%d)\n",
ident.identity, ret);
return ret;
}
/*
* get the resources
*/
ret = misc_register(&sbwdog_miscdev);
if (ret == 0) {
printk(KERN_INFO "%s: timeout is %ld.%ld secs\n", ident.identity,
timeout / 1000000, (timeout / 100000) % 10);
}
ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
ident.identity, (void *)user_dog);
if (ret) {
printk(KERN_ERR "%s: failed to request irq 1 - %d\n", ident.identity,
ret);
misc_deregister(&sbwdog_miscdev);
}
return ret;
}
static void __exit sbwdog_exit(void)
{
misc_deregister(&sbwdog_miscdev);
}
module_init(sbwdog_init);
module_exit(sbwdog_exit);
MODULE_AUTHOR("Andrew Sharp <andy.sharp@onstor.com>");
MODULE_DESCRIPTION("SiByte Watchdog");
module_param(timeout, ulong, 0);
MODULE_PARM_DESC(timeout,
"Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
/*
* example code that can be put in a platform code area to utilize the
* first watchdog timer for the kernels own purpose.
void
platform_wd_setup(void)
{
int ret;
ret = request_irq(0, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
"Kernel Watchdog", IOADDR(A_SCD_WDOG_CFG_0));
if (ret) {
printk(KERN_CRIT "Watchdog IRQ zero(0) failed to be requested - %d\n",
ret);
}
}
*/
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