mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-08-20 11:14:21 +03:00
There is an error in the unlzma system in the kernel. A lzma compressed squashfs filesystem does not work for me. This should compile and works for me on my Asus WL-500GP, please test it on more systems. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16441 3c298f89-4303-0410-b956-a3cf2f4a3e73
327 lines
7.6 KiB
Diff
327 lines
7.6 KiB
Diff
This add watchdog driver for broadcom 47xx device.
|
|
It uses the ssb subsytem to access embeded watchdog device.
|
|
|
|
Because the watchdog timeout is very short (about 2s), a soft timer is used
|
|
to increase the watchdog period.
|
|
|
|
Note : A patch for exporting the ssb_watchdog_timer_set will
|
|
be submitted on next linux-mips merge. Without this patch it can't
|
|
be build as a module.
|
|
|
|
Signed-off-by: Aleksandar Radovanovic <biblbroks@sezampro.rs>
|
|
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
|
|
--- a/drivers/watchdog/Kconfig
|
|
+++ b/drivers/watchdog/Kconfig
|
|
@@ -764,6 +764,12 @@ config TXX9_WDT
|
|
help
|
|
Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
|
|
|
|
+config BCM47XX_WDT
|
|
+ tristate "Broadcom BCM47xx Watchdog Timer"
|
|
+ depends on BCM47XX
|
|
+ help
|
|
+ Hardware driver for the Broadcom BCM47xx Watchog Timer.
|
|
+
|
|
# PARISC Architecture
|
|
|
|
# POWERPC Architecture
|
|
--- a/drivers/watchdog/Makefile
|
|
+++ b/drivers/watchdog/Makefile
|
|
@@ -105,6 +105,7 @@ obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
|
|
obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
|
|
obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
|
|
obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
|
|
+obj-$(CONFIG_BCM47XX_WDT) += bcm47xx_wdt.o
|
|
|
|
# PARISC Architecture
|
|
|
|
--- /dev/null
|
|
+++ b/drivers/watchdog/bcm47xx_wdt.c
|
|
@@ -0,0 +1,286 @@
|
|
+/*
|
|
+ * Watchdog driver for Broadcom BCM47XX
|
|
+ *
|
|
+ * Copyright (C) 2008 Aleksandar Radovanovic <biblbroks@sezampro.rs>
|
|
+ * Copyright (C) 2009 Matthieu CASTET <castet.matthieu@free.fr>
|
|
+ *
|
|
+ * 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/ssb/ssb_embedded.h>
|
|
+#include <asm/mach-bcm47xx/bcm47xx.h>
|
|
+
|
|
+#define DRV_NAME "bcm47xx_wdt"
|
|
+
|
|
+#define WDT_DEFAULT_TIME 30 /* seconds */
|
|
+#define WDT_MAX_TIME 256 /* seconds */
|
|
+
|
|
+static int wdt_time = WDT_DEFAULT_TIME;
|
|
+static int nowayout = WATCHDOG_NOWAYOUT;
|
|
+
|
|
+module_param(wdt_time, int, 0);
|
|
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
|
|
+ __MODULE_STRING(WDT_DEFAULT_TIME) ")");
|
|
+
|
|
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
|
|
+module_param(nowayout, int, 0);
|
|
+MODULE_PARM_DESC(nowayout,
|
|
+ "Watchdog cannot be stopped once started (default="
|
|
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
|
+#endif
|
|
+
|
|
+static unsigned long bcm47xx_wdt_busy;
|
|
+static char expect_release;
|
|
+static struct timer_list wdt_timer;
|
|
+static atomic_t ticks;
|
|
+
|
|
+static inline void bcm47xx_wdt_hw_start(void)
|
|
+{
|
|
+ /* this is 2,5s on 100Mhz clock and 2s on 133 Mhz */
|
|
+ ssb_watchdog_timer_set(&ssb_bcm47xx, 0xfffffff);
|
|
+}
|
|
+
|
|
+static inline int bcm47xx_wdt_hw_stop(void)
|
|
+{
|
|
+ return ssb_watchdog_timer_set(&ssb_bcm47xx, 0);
|
|
+}
|
|
+
|
|
+static void bcm47xx_timer_tick(unsigned long unused)
|
|
+{
|
|
+ if (!atomic_dec_and_test(&ticks)) {
|
|
+ bcm47xx_wdt_hw_start();
|
|
+ mod_timer(&wdt_timer, jiffies + HZ);
|
|
+ } else {
|
|
+ printk(KERN_CRIT DRV_NAME "Watchdog will fire soon!!!\n");
|
|
+ }
|
|
+}
|
|
+
|
|
+static inline void bcm47xx_wdt_pet(void)
|
|
+{
|
|
+ atomic_set(&ticks, wdt_time);
|
|
+}
|
|
+
|
|
+static void bcm47xx_wdt_start(void)
|
|
+{
|
|
+ bcm47xx_wdt_pet();
|
|
+ bcm47xx_timer_tick(0);
|
|
+}
|
|
+
|
|
+static void bcm47xx_wdt_pause(void)
|
|
+{
|
|
+ del_timer_sync(&wdt_timer);
|
|
+ bcm47xx_wdt_hw_stop();
|
|
+}
|
|
+
|
|
+static void bcm47xx_wdt_stop(void)
|
|
+{
|
|
+ bcm47xx_wdt_pause();
|
|
+}
|
|
+
|
|
+static int bcm47xx_wdt_settimeout(int new_time)
|
|
+{
|
|
+ if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
|
|
+ return -EINVAL;
|
|
+
|
|
+ wdt_time = new_time;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int bcm47xx_wdt_open(struct inode *inode, struct file *file)
|
|
+{
|
|
+ if (test_and_set_bit(0, &bcm47xx_wdt_busy))
|
|
+ return -EBUSY;
|
|
+
|
|
+ bcm47xx_wdt_start();
|
|
+ return nonseekable_open(inode, file);
|
|
+}
|
|
+
|
|
+static int bcm47xx_wdt_release(struct inode *inode, struct file *file)
|
|
+{
|
|
+ if (expect_release == 42) {
|
|
+ bcm47xx_wdt_stop();
|
|
+ } else {
|
|
+ printk(KERN_CRIT DRV_NAME
|
|
+ ": Unexpected close, not stopping watchdog!\n");
|
|
+ bcm47xx_wdt_start();
|
|
+ }
|
|
+
|
|
+ clear_bit(0, &bcm47xx_wdt_busy);
|
|
+ expect_release = 0;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static ssize_t bcm47xx_wdt_write(struct file *file, const char __user *data,
|
|
+ size_t len, loff_t *ppos)
|
|
+{
|
|
+ if (len) {
|
|
+ if (!nowayout) {
|
|
+ size_t i;
|
|
+
|
|
+ expect_release = 0;
|
|
+
|
|
+ for (i = 0; i != len; i++) {
|
|
+ char c;
|
|
+ if (get_user(c, data + i))
|
|
+ return -EFAULT;
|
|
+ if (c == 'V')
|
|
+ expect_release = 42;
|
|
+ }
|
|
+ }
|
|
+ bcm47xx_wdt_pet();
|
|
+ }
|
|
+ return len;
|
|
+}
|
|
+
|
|
+static struct watchdog_info bcm47xx_wdt_info = {
|
|
+ .identity = DRV_NAME,
|
|
+ .options = WDIOF_SETTIMEOUT |
|
|
+ WDIOF_KEEPALIVEPING |
|
|
+ WDIOF_MAGICCLOSE,
|
|
+};
|
|
+
|
|
+static long bcm47xx_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, &bcm47xx_wdt_info,
|
|
+ sizeof(bcm47xx_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) {
|
|
+ bcm47xx_wdt_stop();
|
|
+ retval = 0;
|
|
+ }
|
|
+
|
|
+ if (new_value & WDIOS_ENABLECARD) {
|
|
+ bcm47xx_wdt_start();
|
|
+ retval = 0;
|
|
+ }
|
|
+
|
|
+ return retval;
|
|
+
|
|
+ case WDIOC_KEEPALIVE:
|
|
+ bcm47xx_wdt_pet();
|
|
+ return 0;
|
|
+
|
|
+ case WDIOC_SETTIMEOUT:
|
|
+ if (get_user(new_value, p))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (bcm47xx_wdt_settimeout(new_value))
|
|
+ return -EINVAL;
|
|
+
|
|
+ bcm47xx_wdt_pet();
|
|
+
|
|
+ case WDIOC_GETTIMEOUT:
|
|
+ return put_user(wdt_time, p);
|
|
+
|
|
+ default:
|
|
+ return -ENOTTY;
|
|
+ }
|
|
+}
|
|
+
|
|
+static int bcm47xx_wdt_notify_sys(struct notifier_block *this,
|
|
+ unsigned long code, void *unused)
|
|
+{
|
|
+ if (code == SYS_DOWN || code == SYS_HALT)
|
|
+ bcm47xx_wdt_stop();
|
|
+ return NOTIFY_DONE;
|
|
+}
|
|
+
|
|
+static const struct file_operations bcm47xx_wdt_fops = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .llseek = no_llseek,
|
|
+ .unlocked_ioctl = bcm47xx_wdt_ioctl,
|
|
+ .open = bcm47xx_wdt_open,
|
|
+ .release = bcm47xx_wdt_release,
|
|
+ .write = bcm47xx_wdt_write,
|
|
+};
|
|
+
|
|
+static struct miscdevice bcm47xx_wdt_miscdev = {
|
|
+ .minor = WATCHDOG_MINOR,
|
|
+ .name = "watchdog",
|
|
+ .fops = &bcm47xx_wdt_fops,
|
|
+};
|
|
+
|
|
+static struct notifier_block bcm47xx_wdt_notifier = {
|
|
+ .notifier_call = bcm47xx_wdt_notify_sys,
|
|
+};
|
|
+
|
|
+static int __init bcm47xx_wdt_init(void)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ if (bcm47xx_wdt_hw_stop() < 0)
|
|
+ return -ENODEV;
|
|
+
|
|
+ setup_timer(&wdt_timer, bcm47xx_timer_tick, 0L);
|
|
+
|
|
+ if (bcm47xx_wdt_settimeout(wdt_time)) {
|
|
+ bcm47xx_wdt_settimeout(WDT_DEFAULT_TIME);
|
|
+ printk(KERN_INFO DRV_NAME
|
|
+ ": wdt_time value must be 1 <= wdt_time <= 256, using %d\n",
|
|
+ wdt_time);
|
|
+ }
|
|
+
|
|
+ ret = register_reboot_notifier(&bcm47xx_wdt_notifier);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
+ ret = misc_register(&bcm47xx_wdt_miscdev);
|
|
+ if (ret) {
|
|
+ unregister_reboot_notifier(&bcm47xx_wdt_notifier);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ printk(KERN_INFO "BCM47xx Watchdog Timer enabled (%d seconds%s)\n",
|
|
+ wdt_time, nowayout ? ", nowayout" : "");
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void __exit bcm47xx_wdt_exit(void)
|
|
+{
|
|
+ if (!nowayout)
|
|
+ bcm47xx_wdt_stop();
|
|
+
|
|
+ misc_deregister(&bcm47xx_wdt_miscdev);
|
|
+
|
|
+ unregister_reboot_notifier(&bcm47xx_wdt_notifier);
|
|
+}
|
|
+
|
|
+module_init(bcm47xx_wdt_init);
|
|
+module_exit(bcm47xx_wdt_exit);
|
|
+
|
|
+MODULE_AUTHOR("Aleksandar Radovanovic");
|
|
+MODULE_DESCRIPTION("Watchdog driver for Broadcom BCM47xx");
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|