+++ /dev/null
---- /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
-@@ -805,6 +805,12 @@ 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
-@@ -110,6 +110,7 @@ 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_ATHEROS_WDT) += ar2315-wtd.o
-
- # PARISC Architecture
-
projects / openwrt-10.03 / .git / blobdiff