diff options
4 files changed, 236 insertions, 1 deletions
diff --git a/target/linux/atheros/config-2.6.26 b/target/linux/atheros/config-2.6.26 index a143817bb..0747fe96a 100644 --- a/target/linux/atheros/config-2.6.26 +++ b/target/linux/atheros/config-2.6.26 @@ -242,3 +242,4 @@ CONFIG_VIDEO_V4L1=m CONFIG_VIDEO_V4L2=m CONFIG_VIDEO_V4L2_COMMON=m CONFIG_ZONE_DMA_FLAG=0 +CONFIG_ATHEROS_WDT=y diff --git a/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c b/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c index 96c6f8fef..f7c45bae2 100644 --- a/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c +++ b/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c @@ -109,7 +109,13 @@ static struct platform_device ar5315_gpio_leds = { }; #endif -static __initdata struct platform_device *ar5315_devs[5]; +static struct platform_device ar5315_wdt = +{ + .id = 0, + .name = "ar2315_wdt", +}; + +static __initdata struct platform_device *ar5315_devs[6]; static void *flash_regs; @@ -243,6 +249,7 @@ int __init ar5315_init_devices(void) ar5315_devs[dev++] = &ar5315_eth; ar5315_devs[dev++] = &ar5315_wmac; ar5315_devs[dev++] = &ar5315_spiflash; + ar5315_devs[dev++] = &ar5315_wdt; #ifdef CONFIG_LEDS_GPIO ar5315_led_data.num_leds = 0; diff --git a/target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c b/target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c new file mode 100644 index 000000000..1737b968f --- /dev/null +++ b/target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c @@ -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); diff --git a/target/linux/atheros/patches-2.6.26/120-watchdog.patch b/target/linux/atheros/patches-2.6.26/120-watchdog.patch new file mode 100644 index 000000000..64ac6871c --- /dev/null +++ b/target/linux/atheros/patches-2.6.26/120-watchdog.patch @@ -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 + |