diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-2.6.35/020-watchdog.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-2.6.35/020-watchdog.patch | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-2.6.35/020-watchdog.patch b/target/linux/brcm63xx/patches-2.6.35/020-watchdog.patch new file mode 100644 index 0000000000..2a75d06a60 --- /dev/null +++ b/target/linux/brcm63xx/patches-2.6.35/020-watchdog.patch @@ -0,0 +1,386 @@ +--- a/drivers/watchdog/Makefile ++++ b/drivers/watchdog/Makefile +@@ -114,6 +114,7 @@ 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_BCM63XX_WDT) += bcm63xx_wdt.o + + # PARISC Architecture + +--- a/drivers/watchdog/Kconfig ++++ b/drivers/watchdog/Kconfig +@@ -875,6 +875,16 @@ config TXX9_WDT + help + Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs. + ++config BCM63XX_WDT ++ tristate "Broadcom BCM63xx hardware watchdog" ++ depends on BCM63XX ++ help ++ Watchdog driver for the built in watchdog hardware in Broadcom ++ BCM63xx SoC. ++ ++ To compile thi driver as a loadable module, choose M here. ++ The module will be called bcm63xx_wdt. ++ + # PARISC Architecture + + # POWERPC Architecture +--- /dev/null ++++ b/drivers/watchdog/bcm63xx_wdt.c +@@ -0,0 +1,354 @@ ++/* ++ * Broadcom BCM63xx SoC watchdog driver ++ * ++ * Copyright (C) 2007, Miguel Gaio <miguel.gaio@efixo.com> ++ * Copyright (C) 2008, Florian Fainelli <florian@openwrt.org> ++ * ++ * 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. ++ */ ++ ++#include <linux/bitops.h> ++#include <linux/errno.h> ++#include <linux/fs.h> ++#include <linux/init.h> ++#include <linux/kernel.h> ++#include <linux/miscdevice.h> ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/reboot.h> ++#include <linux/types.h> ++#include <linux/uaccess.h> ++#include <linux/watchdog.h> ++#include <linux/timer.h> ++#include <linux/jiffies.h> ++#include <linux/interrupt.h> ++#include <linux/ptrace.h> ++#include <linux/resource.h> ++#include <linux/platform_device.h> ++ ++#include <bcm63xx_cpu.h> ++#include <bcm63xx_io.h> ++#include <bcm63xx_regs.h> ++#include <bcm63xx_timer.h> ++ ++#define PFX KBUILD_MODNAME ++ ++#define WDT_HZ 50000000 /* Fclk */ ++#define WDT_DEFAULT_TIME 30 /* seconds */ ++#define WDT_MAX_TIME 256 /* seconds */ ++ ++static struct { ++ void __iomem *regs; ++ struct timer_list timer; ++ int default_ticks; ++ unsigned long inuse; ++ atomic_t ticks; ++} bcm63xx_wdt_device; ++ ++static int expect_close; ++ ++static int wdt_time = WDT_DEFAULT_TIME; ++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) ")"); ++ ++/* HW functions */ ++static void bcm63xx_wdt_hw_start(void) ++{ ++ bcm_writel(0xfffffffe, bcm63xx_wdt_device.regs + WDT_DEFVAL_REG); ++ bcm_writel(WDT_START_1, bcm63xx_wdt_device.regs + WDT_CTL_REG); ++ bcm_writel(WDT_START_2, bcm63xx_wdt_device.regs + WDT_CTL_REG); ++} ++ ++static void bcm63xx_wdt_hw_stop(void) ++{ ++ bcm_writel(WDT_STOP_1, bcm63xx_wdt_device.regs + WDT_CTL_REG); ++ bcm_writel(WDT_STOP_2, bcm63xx_wdt_device.regs + WDT_CTL_REG); ++} ++ ++static void bcm63xx_wdt_isr(void *data) ++{ ++ struct pt_regs *regs = get_irq_regs(); ++ ++ die(PFX " fire", regs); ++} ++ ++static void bcm63xx_timer_tick(unsigned long unused) ++{ ++ if (!atomic_dec_and_test(&bcm63xx_wdt_device.ticks)) { ++ bcm63xx_wdt_hw_start(); ++ mod_timer(&bcm63xx_wdt_device.timer, jiffies + HZ); ++ } else ++ printk(KERN_CRIT PFX ": watchdog will restart system\n"); ++} ++ ++static void bcm63xx_wdt_pet(void) ++{ ++ atomic_set(&bcm63xx_wdt_device.ticks, wdt_time); ++} ++ ++static void bcm63xx_wdt_start(void) ++{ ++ bcm63xx_wdt_pet(); ++ bcm63xx_timer_tick(0); ++} ++ ++static void bcm63xx_wdt_pause(void) ++{ ++ del_timer_sync(&bcm63xx_wdt_device.timer); ++ bcm63xx_wdt_hw_stop(); ++} ++ ++static int bcm63xx_wdt_settimeout(int new_time) ++{ ++ if ((new_time <= 0) || (new_time > WDT_MAX_TIME)) ++ return -EINVAL; ++ ++ wdt_time = new_time; ++ ++ return 0; ++} ++ ++static int bcm63xx_wdt_open(struct inode *inode, struct file *file) ++{ ++ if (test_and_set_bit(0, &bcm63xx_wdt_device.inuse)) ++ return -EBUSY; ++ ++ bcm63xx_wdt_start(); ++ return nonseekable_open(inode, file); ++} ++ ++static int bcm63xx_wdt_release(struct inode *inode, struct file *file) ++{ ++ if (expect_close == 42) ++ bcm63xx_wdt_pause(); ++ else { ++ printk(KERN_CRIT PFX ++ ": Unexpected close, not stopping watchdog!\n"); ++ bcm63xx_wdt_start(); ++ } ++ clear_bit(0, &bcm63xx_wdt_device.inuse); ++ expect_close = 0; ++ return 0; ++} ++ ++static ssize_t bcm63xx_wdt_write(struct file *file, const char *data, ++ size_t len, loff_t *ppos) ++{ ++ if (len) { ++ if (!nowayout) { ++ size_t i; ++ ++ /* In case it was set long ago */ ++ 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; ++ } ++ } ++ bcm63xx_wdt_pet(); ++ } ++ return len; ++} ++ ++static struct watchdog_info bcm63xx_wdt_info = { ++ .identity = PFX, ++ .options = WDIOF_SETTIMEOUT | ++ WDIOF_KEEPALIVEPING | ++ WDIOF_MAGICCLOSE, ++}; ++ ++ ++static long bcm63xx_wdt_ioctl(struct file *file, unsigned int cmd, ++ unsigned long arg) ++{ ++ void __user *argp = (void __user *)arg; ++ int __user *p = argp; ++ int new_value, retval = -EINVAL; ++ ++ switch (cmd) { ++ case WDIOC_GETSUPPORT: ++ return copy_to_user(argp, &bcm63xx_wdt_info, ++ sizeof(bcm63xx_wdt_info)) ? -EFAULT : 0; ++ ++ case WDIOC_GETSTATUS: ++ case WDIOC_GETBOOTSTATUS: ++ return put_user(0, p); ++ ++ case WDIOC_SETOPTIONS: ++ if (get_user(new_value, p)) ++ return -EFAULT; ++ ++ if (new_value & WDIOS_DISABLECARD) { ++ bcm63xx_wdt_pause(); ++ retval = 0; ++ } ++ if (new_value & WDIOS_ENABLECARD) { ++ bcm63xx_wdt_start(); ++ retval = 0; ++ } ++ ++ return retval; ++ ++ case WDIOC_KEEPALIVE: ++ bcm63xx_wdt_pet(); ++ return 0; ++ ++ case WDIOC_SETTIMEOUT: ++ if (get_user(new_value, p)) ++ return -EFAULT; ++ ++ if (bcm63xx_wdt_settimeout(new_value)) ++ return -EINVAL; ++ ++ bcm63xx_wdt_pet(); ++ ++ case WDIOC_GETTIMEOUT: ++ return put_user(wdt_time, p); ++ ++ default: ++ return -ENOTTY; ++ ++ } ++} ++ ++static int bcm63xx_wdt_notify_sys(struct notifier_block *this, ++ unsigned long code, void *unused) ++{ ++ if (code == SYS_DOWN || code == SYS_HALT) ++ bcm63xx_wdt_pause(); ++ return NOTIFY_DONE; ++} ++ ++static const struct file_operations bcm63xx_wdt_fops = { ++ .owner = THIS_MODULE, ++ .llseek = no_llseek, ++ .write = bcm63xx_wdt_write, ++ .unlocked_ioctl = bcm63xx_wdt_ioctl, ++ .open = bcm63xx_wdt_open, ++ .release = bcm63xx_wdt_release, ++}; ++ ++static struct miscdevice bcm63xx_wdt_miscdev = { ++ .minor = WATCHDOG_MINOR, ++ .name = "watchdog", ++ .fops = &bcm63xx_wdt_fops, ++}; ++ ++static struct notifier_block bcm63xx_wdt_notifier = { ++ .notifier_call = bcm63xx_wdt_notify_sys, ++}; ++ ++ ++static int bcm63xx_wdt_probe(struct platform_device *pdev) ++{ ++ int ret; ++ struct resource *r; ++ ++ setup_timer(&bcm63xx_wdt_device.timer, bcm63xx_timer_tick, 0L); ++ ++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if (!r) { ++ printk(KERN_ERR PFX ++ "failed to retrieve resources\n"); ++ return -ENODEV; ++ } ++ ++ bcm63xx_wdt_device.regs = ioremap_nocache(r->start, r->end - r->start); ++ if (!bcm63xx_wdt_device.regs) { ++ printk(KERN_ERR PFX ++ "failed to remap I/O resources\n"); ++ return -ENXIO; ++ } ++ ++ ret = bcm63xx_timer_register(TIMER_WDT_ID, bcm63xx_wdt_isr, NULL); ++ if (ret < 0) { ++ printk(KERN_ERR PFX ++ "failed to register wdt timer isr\n"); ++ goto unmap; ++ } ++ ++ if (bcm63xx_wdt_settimeout(wdt_time)) { ++ bcm63xx_wdt_settimeout(WDT_DEFAULT_TIME); ++ printk(KERN_INFO PFX ++ ": wdt_time value must be 1 <= wdt_time <= 256, using %d\n", ++ wdt_time); ++ } ++ ++ ret = register_reboot_notifier(&bcm63xx_wdt_notifier); ++ if (ret) { ++ printk(KERN_ERR PFX ++ "failed to register reboot_notifier\n"); ++ goto unregister_timer; ++ } ++ ++ ret = misc_register(&bcm63xx_wdt_miscdev); ++ if (ret < 0) { ++ printk(KERN_ERR PFX ++ "failed to register watchdog device\n"); ++ goto unregister_reboot_notifier; ++ } ++ ++ printk(KERN_INFO PFX " started, timer margin: %d sec\n", WDT_DEFAULT_TIME); ++ ++ return 0; ++ ++unregister_reboot_notifier: ++ unregister_reboot_notifier(&bcm63xx_wdt_notifier); ++unregister_timer: ++ bcm63xx_timer_unregister(TIMER_WDT_ID); ++unmap: ++ iounmap(bcm63xx_wdt_device.regs); ++ return ret; ++} ++ ++static int bcm63xx_wdt_remove(struct platform_device *pdev) ++{ ++ if (!nowayout) ++ bcm63xx_wdt_pause(); ++ ++ misc_deregister(&bcm63xx_wdt_miscdev); ++ ++ iounmap(bcm63xx_wdt_device.regs); ++ ++ unregister_reboot_notifier(&bcm63xx_wdt_notifier); ++ bcm63xx_timer_unregister(TIMER_WDT_ID); ++ ++ return 0; ++} ++ ++static struct platform_driver bcm63xx_wdt = { ++ .probe = bcm63xx_wdt_probe, ++ .remove = bcm63xx_wdt_remove, ++ .driver = { ++ .name = "bcm63xx-wdt", ++ } ++}; ++ ++static int __init bcm63xx_wdt_init(void) ++{ ++ return platform_driver_register(&bcm63xx_wdt); ++} ++ ++static void __exit bcm63xx_wdt_exit(void) ++{ ++ platform_driver_unregister(&bcm63xx_wdt); ++} ++ ++module_init(bcm63xx_wdt_init); ++module_exit(bcm63xx_wdt_exit); ++ ++MODULE_AUTHOR("Miguel Gaio <miguel.gaio@efixo.com>"); ++MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); ++MODULE_DESCRIPTION("Driver for the Broadcom BCM63xx SoC watchdog"); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); ++MODULE_ALIAS("platform:bcm63xx-wdt"); |