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authorJohn Crispin <john@openwrt.org>2010-12-12 22:57:16 +0000
committerJohn Crispin <john@openwrt.org>2010-12-12 22:57:16 +0000
commit9f47e80bb30bed05ebcdfe671d4f2a9e9c7bfe55 (patch)
tree3d80c2524b0e73b5f7c9982eca4fe9301efdf75a /target/linux/lantiq/patches/250-watchdog.patch
parentf590b304ef7d22242e08c86866cbb37927f0a404 (diff)
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adds new lantiq kernel. once the codebase is fully tested and know to be working on all the devices previously supported by ifxmips, we will drop ifxmips support.
SVN-Revision: 24526
Diffstat (limited to 'target/linux/lantiq/patches/250-watchdog.patch')
-rw-r--r--target/linux/lantiq/patches/250-watchdog.patch246
1 files changed, 246 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches/250-watchdog.patch b/target/linux/lantiq/patches/250-watchdog.patch
new file mode 100644
index 0000000000..f86ff71868
--- /dev/null
+++ b/target/linux/lantiq/patches/250-watchdog.patch
@@ -0,0 +1,246 @@
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -840,6 +840,12 @@ config TXX9_WDT
+ help
+ Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
+
++config LANTIQ_WDT
++ bool "Lantiq SoC watchdog"
++ depends on LANTIQ
++ help
++ Hardware driver for the Lantiq SoC Watchdog Timer.
++
+ # PARISC Architecture
+
+ # POWERPC Architecture
+--- 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_LANTIQ_WDT) += lantiq_wdt.o
+
+ # PARISC Architecture
+
+--- /dev/null
++++ b/drivers/watchdog/lantiq_wdt.c
+@@ -0,0 +1,218 @@
++/*
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ * Copyright (C) 2010 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 <linux/clk.h>
++
++#include <lantiq.h>
++
++#define LQ_WDT_PW1 0x00BE0000
++#define LQ_WDT_PW2 0x00DC0000
++
++#define LQ_BIU_WDT_CR 0x3F0
++#define LQ_BIU_WDT_SR 0x3F8
++
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++static int wdt_ok_to_close;
++#endif
++
++static int wdt_timeout = 30;
++static __iomem void *wdt_membase = NULL;
++static unsigned long io_region_clk = 0;
++
++static int
++lq_wdt_enable(unsigned int timeout)
++{
++/* printk("%s:%s[%d] %08X\n",
++ __FILE__, __func__, __LINE__,
++ lq_r32(wdt_membase + LQ_BIU_WDT_SR));
++ if(!lq_r32(wdt_membase + LQ_BIU_WDT_SR))
++ {
++*/ lq_w32(LQ_WDT_PW1, wdt_membase + LQ_BIU_WDT_CR);
++ lq_w32(LQ_WDT_PW2 |
++ (0x3 << 26) | /* PWL */
++ (0x3 << 24) | /* CLKDIV */
++ (0x1 << 31) | /* enable */
++ ((timeout * (io_region_clk / 0x40000)) + 0x1000), /* reload */
++ wdt_membase + LQ_BIU_WDT_CR);
++// }
++ return 0;
++}
++
++static void
++lq_wdt_disable(void)
++{
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++ wdt_ok_to_close = 0;
++#endif
++ lq_w32(LQ_WDT_PW1, wdt_membase + LQ_BIU_WDT_CR);
++ lq_w32(LQ_WDT_PW2, wdt_membase+ LQ_BIU_WDT_CR);
++}
++
++static ssize_t
++lq_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
++ lq_wdt_enable(wdt_timeout);
++ return len;
++}
++
++static struct watchdog_info ident = {
++ .options = WDIOF_MAGICCLOSE,
++ .identity = "lq_wdt",
++};
++
++static int
++lq_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:
++ lq_wdt_enable(wdt_timeout);
++ ret = 0;
++ break;
++ }
++ return ret;
++}
++
++static int
++lq_wdt_open(struct inode *inode, struct file *file)
++{
++ lq_wdt_enable(wdt_timeout);
++ return nonseekable_open(inode, file);
++}
++
++static int
++lq_wdt_release(struct inode *inode, struct file *file)
++{
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++ if (wdt_ok_to_close)
++ lq_wdt_disable();
++ else
++#endif
++ printk(KERN_ERR "lq_wdt: watchdog closed without warning,"
++ " rebooting system\n");
++ return 0;
++}
++
++static const struct file_operations lq_wdt_fops = {
++ .owner = THIS_MODULE,
++ .write = lq_wdt_write,
++ .ioctl = lq_wdt_ioctl,
++ .open = lq_wdt_open,
++ .release = lq_wdt_release,
++};
++
++static struct miscdevice lq_wdt_miscdev = {
++ .minor = WATCHDOG_MINOR,
++ .name = "watchdog",
++ .fops = &lq_wdt_fops,
++};
++
++static int
++lq_wdt_probe(struct platform_device *pdev)
++{
++ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ struct clk *clk;
++ int ret = 0;
++ if(!res)
++ return -ENOENT;
++ res = request_mem_region(res->start, resource_size(res),
++ dev_name(&pdev->dev));
++ if(!res)
++ return -EBUSY;
++ wdt_membase = ioremap_nocache(res->start, resource_size(res));
++ if(!wdt_membase)
++ {
++ ret = -ENOMEM;
++ goto err_release_mem_region;
++ }
++ clk = clk_get(&pdev->dev, "io");
++ io_region_clk = clk_get_rate(clk);;
++ ret = misc_register(&lq_wdt_miscdev);
++ if(!ret)
++ return 0;
++
++ iounmap(wdt_membase);
++err_release_mem_region:
++ release_mem_region(res->start, resource_size(res));
++ return ret;
++}
++
++static int
++lq_wdt_remove(struct platform_device *dev)
++{
++ lq_wdt_disable();
++ misc_deregister(&lq_wdt_miscdev);
++ return 0;
++}
++
++static struct platform_driver lq_wdt_driver = {
++ .probe = lq_wdt_probe,
++ .remove = lq_wdt_remove,
++ .driver = {
++ .name = "lq_wdt",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init
++init_lq_wdt(void)
++{
++ return platform_driver_register(&lq_wdt_driver);
++}
++
++static void __exit
++exit_lq_wdt(void)
++{
++ platform_driver_unregister(&lq_wdt_driver);
++}
++
++module_init(init_lq_wdt);
++module_exit(exit_lq_wdt);
++
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_DESCRIPTION("ifxmips Watchdog");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);