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openwrt/target/linux/ifxmips/patches-2.6.30/150-wdt.patch
John Crispin 5432846140 ifxmips: fold files/drivers/* into patches 
SVN-Revision: 18082
2009-10-19 20:56:55 +00:00

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Index: linux-2.6.30.8/drivers/watchdog/Makefile
===================================================================
--- linux-2.6.30.8.orig/drivers/watchdog/Makefile 2009-09-24 17:28:02.000000000 +0200
+++ linux-2.6.30.8/drivers/watchdog/Makefile 2009-10-19 21:31:32.000000000 +0200
@@ -105,6 +105,7 @@
obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
+obj-$(CONFIG_IFXMIPS_WDT) += ifxmips_wdt.o
# PARISC Architecture
Index: linux-2.6.30.8/drivers/watchdog/Kconfig
===================================================================
--- linux-2.6.30.8.orig/drivers/watchdog/Kconfig 2009-09-24 17:28:02.000000000 +0200
+++ linux-2.6.30.8/drivers/watchdog/Kconfig 2009-10-19 21:31:32.000000000 +0200
@@ -764,6 +764,12 @@
help
Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
+config IFXMIPS_WDT
+ bool "IFXMips watchdog"
+ depends on IFXMIPS
+ help
+ Hardware driver for the IFXMIPS Watchdog Timer.
+
# PARISC Architecture
# POWERPC Architecture
Index: linux-2.6.30.8/drivers/watchdog/ifxmips_wdt.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.30.8/drivers/watchdog/ifxmips_wdt.c 2009-10-19 21:40:17.000000000 +0200
@@ -0,0 +1,195 @@
+/*
+ * 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 wdt driver
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+
+#include <ifxmips.h>
+#include <ifxmips_cgu.h>
+
+#define IFXMIPS_WDT_PW1 0x00BE0000
+#define IFXMIPS_WDT_PW2 0x00DC0000
+
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+static int wdt_ok_to_close;
+#endif
+
+static int wdt_timeout = 30;
+
+int ifxmips_wdt_enable(unsigned int timeout)
+{
+ u32 fpi;
+ fpi = cgu_get_io_region_clock();
+ ifxmips_w32(IFXMIPS_WDT_PW1, IFXMIPS_BIU_WDT_CR);
+ ifxmips_w32(IFXMIPS_WDT_PW2 |
+ (0x3 << 26) | /* PWL */
+ (0x3 << 24) | /* CLKDIV */
+ (0x1 << 31) | /* enable */
+ ((timeout * (fpi / 0x40000)) + 0x1000), /* reload */
+ IFXMIPS_BIU_WDT_CR);
+ return 0;
+}
+
+void ifxmips_wdt_disable(void)
+{
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ wdt_ok_to_close = 0;
+#endif
+ ifxmips_w32(IFXMIPS_WDT_PW1, IFXMIPS_BIU_WDT_CR);
+ ifxmips_w32(IFXMIPS_WDT_PW2, IFXMIPS_BIU_WDT_CR);
+}
+
+static ssize_t ifxmips_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ size_t i;
+
+ if (!len)
+ return 0;
+
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ wdt_ok_to_close = 1;
+ }
+#endif
+ ifxmips_wdt_enable(wdt_timeout);
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_MAGICCLOSE,
+ .identity = "ifxmips Watchdog",
+};
+
+static int ifxmips_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret = -ENOTTY;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info __user *)arg, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(wdt_timeout, (int __user *)arg);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(wdt_timeout, (int __user *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ ifxmips_wdt_enable(wdt_timeout);
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int ifxmips_wdt_open(struct inode *inode, struct file *file)
+{
+ ifxmips_wdt_enable(wdt_timeout);
+ return nonseekable_open(inode, file);
+}
+
+static int ifxmips_wdt_release(struct inode *inode, struct file *file)
+{
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ if (wdt_ok_to_close)
+ ifxmips_wdt_disable();
+ else
+#endif
+ printk(KERN_ERR "ifxmips_wdt: watchdog closed without warning,"
+ " rebooting system\n");
+ return 0;
+}
+
+static const struct file_operations ifxmips_wdt_fops = {
+ .owner = THIS_MODULE,
+ .write = ifxmips_wdt_write,
+ .ioctl = ifxmips_wdt_ioctl,
+ .open = ifxmips_wdt_open,
+ .release = ifxmips_wdt_release,
+};
+
+static struct miscdevice ifxmips_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ifxmips_wdt_fops,
+};
+
+static int ifxmips_wdt_probe(struct platform_device *dev)
+{
+ int err;
+ err = misc_register(&ifxmips_wdt_miscdev);
+ if (err)
+ printk(KERN_INFO "ifxmips_wdt: error creating device\n");
+ else
+ printk(KERN_INFO "ifxmips_wdt: loaded\n");
+ return err;
+}
+
+static int ifxmips_wdt_remove(struct platform_device *dev)
+{
+ ifxmips_wdt_disable();
+ misc_deregister(&ifxmips_wdt_miscdev);
+ return 0;
+}
+
+
+static struct platform_driver ifxmips_wdt_driver = {
+ .probe = ifxmips_wdt_probe,
+ .remove = ifxmips_wdt_remove,
+ .driver = {
+ .name = "ifxmips_wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init init_ifxmips_wdt(void)
+{
+ int ret = platform_driver_register(&ifxmips_wdt_driver);
+ if (ret)
+ printk(KERN_INFO "ifxmips_wdt: error registering platfom driver!");
+ return ret;
+}
+
+static void __exit exit_ifxmips_wdt(void)
+{
+ platform_driver_unregister(&ifxmips_wdt_driver);
+}
+
+module_init(init_ifxmips_wdt);
+module_exit(exit_ifxmips_wdt);
+
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("ifxmips Watchdog");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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