diff options
Diffstat (limited to 'target/linux/atheros/patches-2.6.35/130-watchdog.patch')
| -rw-r--r-- | target/linux/atheros/patches-2.6.35/130-watchdog.patch | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/target/linux/atheros/patches-2.6.35/130-watchdog.patch b/target/linux/atheros/patches-2.6.35/130-watchdog.patch new file mode 100644 index 0000000000..80d244e447 --- /dev/null +++ b/target/linux/atheros/patches-2.6.35/130-watchdog.patch @@ -0,0 +1,228 @@ +--- /dev/null ++++ b/drivers/watchdog/ar2315-wtd.c +@@ -0,0 +1,200 @@ ++/* ++ * 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 <ar231x_platform.h> ++#include <ar2315_regs.h> ++#include <ar231x.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) ++{ ++ ar231x_write_reg(AR2315_WD, wdt_timeout * CLOCK_RATE); ++ ar231x_write_reg(AR2315_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"); ++ emergency_restart(); ++ } else { ++ ar231x_write_reg(AR2315_WDC, 0); ++ ar231x_write_reg(AR2315_WD, 0); ++ ar231x_write_reg(AR2315_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); +--- a/drivers/watchdog/Kconfig ++++ b/drivers/watchdog/Kconfig +@@ -857,6 +857,12 @@ config TXX9_WDT + help + Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs. + ++config ATHEROS_WDT ++ tristate "Atheros wisoc Watchdog Timer" ++ depends on ATHEROS_AR231X ++ help ++ Hardware driver for the Atheros wisoc Watchdog Timer. ++ + # PARISC Architecture + + # POWERPC Architecture +--- a/drivers/watchdog/Makefile ++++ b/drivers/watchdog/Makefile +@@ -113,6 +113,7 @@ obj-$(CONFIG_PNX833X_WDT) += pnx833x_wdt + obj-$(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 + |