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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.patch386
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");
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