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Diffstat (limited to 'drivers/char/watchdog/wafer5823wdt.c')
-rw-r--r--drivers/char/watchdog/wafer5823wdt.c325
1 files changed, 0 insertions, 325 deletions
diff --git a/drivers/char/watchdog/wafer5823wdt.c b/drivers/char/watchdog/wafer5823wdt.c
deleted file mode 100644
index 950905d3c39..00000000000
--- a/drivers/char/watchdog/wafer5823wdt.c
+++ /dev/null
@@ -1,325 +0,0 @@
-/*
- * ICP Wafer 5823 Single Board Computer WDT driver
- * http://www.icpamerica.com/wafer_5823.php
- * May also work on other similar models
- *
- * (c) Copyright 2002 Justin Cormack <justin@street-vision.com>
- *
- * Release 0.02
- *
- * Based on advantechwdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * 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.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.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/spinlock.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#define WATCHDOG_NAME "Wafer 5823 WDT"
-#define PFX WATCHDOG_NAME ": "
-#define WD_TIMO 60 /* 60 sec default timeout */
-
-static unsigned long wafwdt_is_open;
-static char expect_close;
-static spinlock_t wafwdt_lock;
-
-/*
- * You must set these - there is no sane way to probe for this board.
- *
- * To enable, write the timeout value in seconds (1 to 255) to I/O
- * port WDT_START, then read the port to start the watchdog. To pat
- * the dog, read port WDT_STOP to stop the timer, then read WDT_START
- * to restart it again.
- */
-
-static int wdt_stop = 0x843;
-static int wdt_start = 0x443;
-
-static int timeout = WD_TIMO; /* in seconds */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) ".");
-
-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) ")");
-
-static void wafwdt_ping(void)
-{
- /* pat watchdog */
- spin_lock(&wafwdt_lock);
- inb_p(wdt_stop);
- inb_p(wdt_start);
- spin_unlock(&wafwdt_lock);
-}
-
-static void wafwdt_start(void)
-{
- /* start up watchdog */
- outb_p(timeout, wdt_start);
- inb_p(wdt_start);
-}
-
-static void
-wafwdt_stop(void)
-{
- /* stop watchdog */
- inb_p(wdt_stop);
-}
-
-static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- /* Well, anyhow someone wrote to us, we should return that favour */
- wafwdt_ping();
- }
- return count;
-}
-
-static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int new_timeout;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "Wafer 5823 WDT",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof (ident)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- wafwdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if ((new_timeout < 1) || (new_timeout > 255))
- return -EINVAL;
- timeout = new_timeout;
- wafwdt_stop();
- wafwdt_start();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wafwdt_start();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wafwdt_stop();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int wafwdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &wafwdt_is_open))
- return -EBUSY;
-
- /*
- * Activate
- */
- wafwdt_start();
- return nonseekable_open(inode, file);
-}
-
-static int
-wafwdt_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- wafwdt_stop();
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
- wafwdt_ping();
- }
- clear_bit(0, &wafwdt_is_open);
- expect_close = 0;
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the WDT off */
- wafwdt_stop();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations wafwdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wafwdt_write,
- .ioctl = wafwdt_ioctl,
- .open = wafwdt_open,
- .release = wafwdt_close,
-};
-
-static struct miscdevice wafwdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wafwdt_fops,
-};
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wafwdt_notifier = {
- .notifier_call = wafwdt_notify_sys,
-};
-
-static int __init wafwdt_init(void)
-{
- int ret;
-
- printk(KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n");
-
- spin_lock_init(&wafwdt_lock);
-
- if (timeout < 1 || timeout > 255) {
- timeout = WD_TIMO;
- printk (KERN_INFO PFX "timeout value must be 1<=x<=255, using %d\n",
- timeout);
- }
-
- if (wdt_stop != wdt_start) {
- if(!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
- ret = -EIO;
- goto error;
- }
- }
-
- if(!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
- ret = -EIO;
- goto error2;
- }
-
- ret = register_reboot_notifier(&wafwdt_notifier);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto error3;
- }
-
- ret = misc_register(&wafwdt_miscdev);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto error4;
- }
-
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
- return ret;
-error4:
- unregister_reboot_notifier(&wafwdt_notifier);
-error3:
- release_region(wdt_start, 1);
-error2:
- if (wdt_stop != wdt_start)
- release_region(wdt_stop, 1);
-error:
- return ret;
-}
-
-static void __exit wafwdt_exit(void)
-{
- misc_deregister(&wafwdt_miscdev);
- unregister_reboot_notifier(&wafwdt_notifier);
- if(wdt_stop != wdt_start)
- release_region(wdt_stop, 1);
- release_region(wdt_start, 1);
-}
-
-module_init(wafwdt_init);
-module_exit(wafwdt_exit);
-
-MODULE_AUTHOR("Justin Cormack");
-MODULE_DESCRIPTION("ICP Wafer 5823 Single Board Computer WDT driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-/* end of wafer5823wdt.c */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 19:59:42 +0000