mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 15:32:50 +02:00
4d9258acb3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19921 3c298f89-4303-0410-b956-a3cf2f4a3e73
367 lines
8.5 KiB
Diff
367 lines
8.5 KiB
Diff
--- a/drivers/watchdog/Makefile
|
|
+++ b/drivers/watchdog/Makefile
|
|
@@ -112,6 +112,7 @@ 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
|
|
@@ -840,6 +840,16 @@ 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 +1,334 @@
|
|
+/*
|
|
+ * 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/resource.h>
|
|
+#include <linux/platform_device.h>
|
|
+
|
|
+#include <bcm63xx_cpu.h>
|
|
+#include <bcm63xx_io.h>
|
|
+#include <bcm63xx_regs.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 timeout;
|
|
+
|
|
+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_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;
|
|
+ }
|
|
+
|
|
+ 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");
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ ret = misc_register(&bcm63xx_wdt_miscdev);
|
|
+ if (ret < 0) {
|
|
+ printk(KERN_ERR PFX
|
|
+ "failed to register watchdog device\n");
|
|
+ goto unmap;
|
|
+ }
|
|
+
|
|
+ printk(KERN_INFO PFX " started, timer margin: %d sec\n", WDT_DEFAULT_TIME);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+unmap:
|
|
+ unregister_reboot_notifier(&bcm63xx_wdt_notifier);
|
|
+ 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);
|
|
+
|
|
+ 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");
|