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authorWim Van Sebroeck <wim@iguana.be>2007-08-17 08:38:02 +0000
committerWim Van Sebroeck <wim@iguana.be>2007-10-18 10:39:03 +0000
commitb7e04f8c61a46d742de23af5d7ca2b41b33e40ac (patch)
treec52a7ea568648e2d8ed0d423098b42298de2058b /drivers/char/watchdog/booke_wdt.c
parentd85714d81cc0408daddb68c10f7fd69eafe7c213 (diff)
downloadlinux-b7e04f8c61a46d742de23af5d7ca2b41b33e40ac.tar.bz2
mv watchdog tree under drivers
move watchdog tree from drivers/char/watchdog to drivers/watchdog. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/char/watchdog/booke_wdt.c')
-rw-r--r--drivers/char/watchdog/booke_wdt.c194
1 files changed, 0 insertions, 194 deletions
diff --git a/drivers/char/watchdog/booke_wdt.c b/drivers/char/watchdog/booke_wdt.c
deleted file mode 100644
index d362f5bf658a..000000000000
--- a/drivers/char/watchdog/booke_wdt.c
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * drivers/char/watchdog/booke_wdt.c
- *
- * Watchdog timer for PowerPC Book-E systems
- *
- * Author: Matthew McClintock
- * Maintainer: Kumar Gala <galak@kernel.crashing.org>
- *
- * Copyright 2005 Freescale Semiconductor Inc.
- *
- * 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/module.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/notifier.h>
-#include <linux/watchdog.h>
-
-#include <asm/reg_booke.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-/* If the kernel parameter wdt=1, the watchdog will be enabled at boot.
- * Also, the wdt_period sets the watchdog timer period timeout.
- * For E500 cpus the wdt_period sets which bit changing from 0->1 will
- * trigger a watchog timeout. This watchdog timeout will occur 3 times, the
- * first time nothing will happen, the second time a watchdog exception will
- * occur, and the final time the board will reset.
- */
-
-#ifdef CONFIG_FSL_BOOKE
-#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz , reset=~40sec */
-#else
-#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */
-#endif /* for timing information */
-
-u32 booke_wdt_enabled = 0;
-u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
-
-#ifdef CONFIG_FSL_BOOKE
-#define WDTP(x) ((((63-x)&0x3)<<30)|(((63-x)&0x3c)<<15))
-#else
-#define WDTP(x) (TCR_WP(x))
-#endif
-
-/*
- * booke_wdt_ping:
- */
-static __inline__ void booke_wdt_ping(void)
-{
- mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
-}
-
-/*
- * booke_wdt_enable:
- */
-static __inline__ void booke_wdt_enable(void)
-{
- u32 val;
-
- /* clear status before enabling watchdog */
- booke_wdt_ping();
- val = mfspr(SPRN_TCR);
- val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
-
- mtspr(SPRN_TCR, val);
-}
-
-/*
- * booke_wdt_write:
- */
-static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- booke_wdt_ping();
- return count;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .firmware_version = 0,
- .identity = "PowerPC Book-E Watchdog",
-};
-
-/*
- * booke_wdt_ioctl:
- */
-static int booke_wdt_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- u32 tmp = 0;
- u32 __user *p = (u32 __user *)arg;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user ((struct watchdog_info __user *) arg, &ident,
- sizeof(struct watchdog_info)))
- return -EFAULT;
- case WDIOC_GETSTATUS:
- return put_user(ident.options, p);
- case WDIOC_GETBOOTSTATUS:
- /* XXX: something is clearing TSR */
- tmp = mfspr(SPRN_TSR) & TSR_WRS(3);
- /* returns 1 if last reset was caused by the WDT */
- return (tmp ? 1 : 0);
- case WDIOC_KEEPALIVE:
- booke_wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(booke_wdt_period, p))
- return -EFAULT;
- mtspr(SPRN_TCR, (mfspr(SPRN_TCR)&~WDTP(0))|WDTP(booke_wdt_period));
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(booke_wdt_period, p);
- case WDIOC_SETOPTIONS:
- if (get_user(tmp, p))
- return -EINVAL;
- if (tmp == WDIOS_ENABLECARD) {
- booke_wdt_ping();
- break;
- } else
- return -EINVAL;
- return 0;
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-/*
- * booke_wdt_open:
- */
-static int booke_wdt_open (struct inode *inode, struct file *file)
-{
- if (booke_wdt_enabled == 0) {
- booke_wdt_enabled = 1;
- booke_wdt_enable();
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
- booke_wdt_period);
- }
-
- return nonseekable_open(inode, file);
-}
-
-static const struct file_operations booke_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = booke_wdt_write,
- .ioctl = booke_wdt_ioctl,
- .open = booke_wdt_open,
-};
-
-static struct miscdevice booke_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &booke_wdt_fops,
-};
-
-static void __exit booke_wdt_exit(void)
-{
- misc_deregister(&booke_wdt_miscdev);
-}
-
-/*
- * booke_wdt_init:
- */
-static int __init booke_wdt_init(void)
-{
- int ret = 0;
-
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
- ident.firmware_version = cur_cpu_spec->pvr_value;
-
- ret = misc_register(&booke_wdt_miscdev);
- if (ret) {
- printk (KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- return ret;
- }
-
- if (booke_wdt_enabled == 1) {
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
- booke_wdt_period);
- booke_wdt_enable();
- }
-
- return ret;
-}
-device_initcall(booke_wdt_init);