parent
58fb9f67ec
commit
9379dc19b6
@ -0,0 +1,198 @@ |
||||
/*
|
||||
* 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. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||||
* |
||||
* Copyright (C) 2008 John Crispin <blogic@openwrt.org> |
||||
* Based on EP93xx and ifxmips wdt driver |
||||
*/ |
||||
|
||||
#include <linux/interrupt.h> |
||||
#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/platform_device.h> |
||||
|
||||
#include <asm/io.h> |
||||
#include <asm/uaccess.h> |
||||
#include <asm/system.h> |
||||
#include <asm/addrspace.h> |
||||
#include <ar531x.h> |
||||
|
||||
#define CLOCK_RATE 40000000 |
||||
#define HEARTBEAT(x) (x < 1 || x > 90)?(20):(x) |
||||
|
||||
static int wdt_timeout = 20; |
||||
static int started = 0; |
||||
static int in_use = 0; |
||||
|
||||
static void |
||||
ar2315_wdt_enable(void) |
||||
{ |
||||
sysRegWrite(AR5315_WD, wdt_timeout * CLOCK_RATE); |
||||
sysRegWrite(AR5315_ISR, 0x80); |
||||
} |
||||
|
||||
static ssize_t |
||||
ar2315_wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos) |
||||
{ |
||||
if(len) |
||||
ar2315_wdt_enable(); |
||||
return len; |
||||
} |
||||
|
||||
static int |
||||
ar2315_wdt_open(struct inode *inode, struct file *file) |
||||
{ |
||||
if(in_use) |
||||
return -EBUSY; |
||||
ar2315_wdt_enable(); |
||||
in_use = started = 1; |
||||
return nonseekable_open(inode, file); |
||||
} |
||||
|
||||
static int |
||||
ar2315_wdt_release(struct inode *inode, struct file *file) |
||||
{ |
||||
in_use = 0; |
||||
return 0; |
||||
} |
||||
|
||||
static irqreturn_t |
||||
ar2315_wdt_interrupt(int irq, void *dev_id) |
||||
{ |
||||
if(started) |
||||
{ |
||||
printk(KERN_CRIT "watchdog expired, rebooting system\n"); |
||||
sysRegWrite(AR5315_COLD_RESET, RESET_SYSTEM); |
||||
} else { |
||||
sysRegWrite(AR5315_WDC, 0); |
||||
sysRegWrite(AR5315_WD, 0); |
||||
sysRegWrite(AR5315_ISR, 0x80); |
||||
} |
||||
return IRQ_HANDLED; |
||||
} |
||||
|
||||
static struct watchdog_info ident = { |
||||
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, |
||||
.identity = "ar2315 Watchdog", |
||||
}; |
||||
|
||||
static int |
||||
ar2315_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
||||
{ |
||||
int new_wdt_timeout; |
||||
int ret = -ENOIOCTLCMD; |
||||
|
||||
switch(cmd) |
||||
{ |
||||
case WDIOC_GETSUPPORT: |
||||
ret = copy_to_user((struct watchdog_info __user *)arg, &ident, sizeof(ident)) ? -EFAULT : 0; |
||||
break; |
||||
|
||||
case WDIOC_KEEPALIVE: |
||||
ar2315_wdt_enable(); |
||||
ret = 0; |
||||
break; |
||||
|
||||
case WDIOC_SETTIMEOUT: |
||||
if((ret = get_user(new_wdt_timeout, (int __user *)arg))) |
||||
break; |
||||
wdt_timeout = HEARTBEAT(new_wdt_timeout); |
||||
ar2315_wdt_enable(); |
||||
break; |
||||
|
||||
case WDIOC_GETTIMEOUT: |
||||
ret = put_user(wdt_timeout, (int __user *)arg); |
||||
break; |
||||
} |
||||
return ret; |
||||
} |
||||
|
||||
static struct file_operations ar2315_wdt_fops = { |
||||
.owner = THIS_MODULE, |
||||
.llseek = no_llseek, |
||||
.write = ar2315_wdt_write, |
||||
.ioctl = ar2315_wdt_ioctl, |
||||
.open = ar2315_wdt_open, |
||||
.release = ar2315_wdt_release, |
||||
}; |
||||
|
||||
static struct miscdevice ar2315_wdt_miscdev = { |
||||
.minor = WATCHDOG_MINOR, |
||||
.name = "watchdog", |
||||
.fops = &ar2315_wdt_fops, |
||||
}; |
||||
|
||||
static int |
||||
ar2315_wdt_probe(struct platform_device *dev) |
||||
{ |
||||
int ret = 0; |
||||
|
||||
ar2315_wdt_enable(); |
||||
ret = request_irq(AR531X_MISC_IRQ_WATCHDOG, ar2315_wdt_interrupt, IRQF_DISABLED, "ar2315_wdt", NULL); |
||||
if(ret) |
||||
{ |
||||
printk(KERN_ERR "ar2315wdt: failed to register inetrrupt\n"); |
||||
goto out; |
||||
} |
||||
|
||||
ret = misc_register(&ar2315_wdt_miscdev); |
||||
if(ret) |
||||
printk(KERN_ERR "ar2315wdt: failed to register miscdev\n"); |
||||
|
||||
out: |
||||
return ret; |
||||
} |
||||
|
||||
static int |
||||
ar2315_wdt_remove(struct platform_device *dev) |
||||
{ |
||||
misc_deregister(&ar2315_wdt_miscdev); |
||||
free_irq(AR531X_MISC_IRQ_WATCHDOG, NULL); |
||||
return 0; |
||||
} |
||||
|
||||
static struct platform_driver ar2315_wdt_driver = { |
||||
.probe = ar2315_wdt_probe, |
||||
.remove = ar2315_wdt_remove, |
||||
.driver = { |
||||
.name = "ar2315_wdt", |
||||
.owner = THIS_MODULE, |
||||
}, |
||||
}; |
||||
|
||||
static int __init |
||||
init_ar2315_wdt(void) |
||||
{ |
||||
int ret = platform_driver_register(&ar2315_wdt_driver); |
||||
if(ret) |
||||
printk(KERN_INFO "ar2315_wdt: error registering platfom driver!"); |
||||
return ret; |
||||
} |
||||
|
||||
static void __exit |
||||
exit_ar2315_wdt(void) |
||||
{ |
||||
platform_driver_unregister(&ar2315_wdt_driver); |
||||
} |
||||
|
||||
module_init(init_ar2315_wdt); |
||||
module_exit(exit_ar2315_wdt); |
@ -0,0 +1,29 @@ |
||||
Index: linux-2.6.26.2/drivers/watchdog/Kconfig
|
||||
===================================================================
|
||||
--- linux-2.6.26.2.orig/drivers/watchdog/Kconfig 2008-08-14 16:54:30.000000000 +0200
|
||||
+++ linux-2.6.26.2/drivers/watchdog/Kconfig 2008-08-14 16:55:40.000000000 +0200
|
||||
@@ -683,6 +683,12 @@
|
||||
help
|
||||
Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
|
||||
|
||||
+config ATHEROS_WDT
|
||||
+ tristate "Atheros wisoc Watchdog Timer"
|
||||
+ depends on ATHEROS
|
||||
+ help
|
||||
+ Hardware driver for the Atheros wisoc Watchdog Timer.
|
||||
+
|
||||
# PARISC Architecture
|
||||
|
||||
# POWERPC Architecture
|
||||
Index: linux-2.6.26.2/drivers/watchdog/Makefile
|
||||
===================================================================
|
||||
--- linux-2.6.26.2.orig/drivers/watchdog/Makefile 2008-08-14 16:55:44.000000000 +0200
|
||||
+++ linux-2.6.26.2/drivers/watchdog/Makefile 2008-08-14 16:58:16.000000000 +0200
|
||||
@@ -97,6 +97,7 @@
|
||||
obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
|
||||
obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
|
||||
obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
|
||||
+obj-$(CONFIG_ATHEROS_WDT) += ar2315-wtd.o
|
||||
|
||||
# PARISC Architecture
|
||||
|
Loading…
Reference in new issue