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Diffstat (limited to 'drivers/char/watchdog/sbc8360.c')
-rw-r--r--drivers/char/watchdog/sbc8360.c413
1 files changed, 0 insertions, 413 deletions
diff --git a/drivers/char/watchdog/sbc8360.c b/drivers/char/watchdog/sbc8360.c
deleted file mode 100644
index 285d8528953..00000000000
--- a/drivers/char/watchdog/sbc8360.c
+++ /dev/null
@@ -1,413 +0,0 @@
-/*
- * SBC8360 Watchdog driver
- *
- * (c) Copyright 2005 Webcon, Inc.
- *
- * Based on ib700wdt.c, which is based on advantechwdt.c which is based
- * on acquirewdt.c which is based on wdt.c.
- *
- * (c) Copyright 2001 Charles Howes <chowes@vsol.net>
- *
- * Based on advantechwdt.c which is based on acquirewdt.c which
- * is based on wdt.c.
- *
- * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
- *
- * Based on acquirewdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996 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@redhat.com>
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- * Added timeout module option to override default
- *
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/notifier.h>
-#include <linux/fs.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/moduleparam.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-static unsigned long sbc8360_is_open;
-static spinlock_t sbc8360_lock;
-static char expect_close;
-
-#define PFX "sbc8360: "
-
-/*
- *
- * Watchdog Timer Configuration
- *
- * The function of the watchdog timer is to reset the system automatically
- * and is defined at I/O port 0120H and 0121H. To enable the watchdog timer
- * and allow the system to reset, write appropriate values from the table
- * below to I/O port 0120H and 0121H. To disable the timer, write a zero
- * value to I/O port 0121H for the system to stop the watchdog function.
- *
- * The following describes how the timer should be programmed (according to
- * the vendor documentation)
- *
- * Enabling Watchdog:
- * MOV AX,000AH (enable, phase I)
- * MOV DX,0120H
- * OUT DX,AX
- * MOV AX,000BH (enable, phase II)
- * MOV DX,0120H
- * OUT DX,AX
- * MOV AX,000nH (set multiplier n, from 1-4)
- * MOV DX,0120H
- * OUT DX,AX
- * MOV AX,000mH (set base timer m, from 0-F)
- * MOV DX,0121H
- * OUT DX,AX
- *
- * Reset timer:
- * MOV AX,000mH (same as set base timer, above)
- * MOV DX,0121H
- * OUT DX,AX
- *
- * Disabling Watchdog:
- * MOV AX,0000H (a zero value)
- * MOV DX,0120H
- * OUT DX,AX
- *
- * Watchdog timeout configuration values:
- * N
- * M | 1 2 3 4
- * --|----------------------------------
- * 0 | 0.5s 5s 50s 100s
- * 1 | 1s 10s 100s 200s
- * 2 | 1.5s 15s 150s 300s
- * 3 | 2s 20s 200s 400s
- * 4 | 2.5s 25s 250s 500s
- * 5 | 3s 30s 300s 600s
- * 6 | 3.5s 35s 350s 700s
- * 7 | 4s 40s 400s 800s
- * 8 | 4.5s 45s 450s 900s
- * 9 | 5s 50s 500s 1000s
- * A | 5.5s 55s 550s 1100s
- * B | 6s 60s 600s 1200s
- * C | 6.5s 65s 650s 1300s
- * D | 7s 70s 700s 1400s
- * E | 7.5s 75s 750s 1500s
- * F | 8s 80s 800s 1600s
- *
- * Another way to say the same things is:
- * For N=1, Timeout = (M+1) * 0.5s
- * For N=2, Timeout = (M+1) * 5s
- * For N=3, Timeout = (M+1) * 50s
- * For N=4, Timeout = (M+1) * 100s
- *
- */
-
-static int wd_times[64][2] = {
- {0, 1}, /* 0 = 0.5s */
- {1, 1}, /* 1 = 1s */
- {2, 1}, /* 2 = 1.5s */
- {3, 1}, /* 3 = 2s */
- {4, 1}, /* 4 = 2.5s */
- {5, 1}, /* 5 = 3s */
- {6, 1}, /* 6 = 3.5s */
- {7, 1}, /* 7 = 4s */
- {8, 1}, /* 8 = 4.5s */
- {9, 1}, /* 9 = 5s */
- {0xA, 1}, /* 10 = 5.5s */
- {0xB, 1}, /* 11 = 6s */
- {0xC, 1}, /* 12 = 6.5s */
- {0xD, 1}, /* 13 = 7s */
- {0xE, 1}, /* 14 = 7.5s */
- {0xF, 1}, /* 15 = 8s */
- {0, 2}, /* 16 = 5s */
- {1, 2}, /* 17 = 10s */
- {2, 2}, /* 18 = 15s */
- {3, 2}, /* 19 = 20s */
- {4, 2}, /* 20 = 25s */
- {5, 2}, /* 21 = 30s */
- {6, 2}, /* 22 = 35s */
- {7, 2}, /* 23 = 40s */
- {8, 2}, /* 24 = 45s */
- {9, 2}, /* 25 = 50s */
- {0xA, 2}, /* 26 = 55s */
- {0xB, 2}, /* 27 = 60s */
- {0xC, 2}, /* 28 = 65s */
- {0xD, 2}, /* 29 = 70s */
- {0xE, 2}, /* 30 = 75s */
- {0xF, 2}, /* 31 = 80s */
- {0, 3}, /* 32 = 50s */
- {1, 3}, /* 33 = 100s */
- {2, 3}, /* 34 = 150s */
- {3, 3}, /* 35 = 200s */
- {4, 3}, /* 36 = 250s */
- {5, 3}, /* 37 = 300s */
- {6, 3}, /* 38 = 350s */
- {7, 3}, /* 39 = 400s */
- {8, 3}, /* 40 = 450s */
- {9, 3}, /* 41 = 500s */
- {0xA, 3}, /* 42 = 550s */
- {0xB, 3}, /* 43 = 600s */
- {0xC, 3}, /* 44 = 650s */
- {0xD, 3}, /* 45 = 700s */
- {0xE, 3}, /* 46 = 750s */
- {0xF, 3}, /* 47 = 800s */
- {0, 4}, /* 48 = 100s */
- {1, 4}, /* 49 = 200s */
- {2, 4}, /* 50 = 300s */
- {3, 4}, /* 51 = 400s */
- {4, 4}, /* 52 = 500s */
- {5, 4}, /* 53 = 600s */
- {6, 4}, /* 54 = 700s */
- {7, 4}, /* 55 = 800s */
- {8, 4}, /* 56 = 900s */
- {9, 4}, /* 57 = 1000s */
- {0xA, 4}, /* 58 = 1100s */
- {0xB, 4}, /* 59 = 1200s */
- {0xC, 4}, /* 60 = 1300s */
- {0xD, 4}, /* 61 = 1400s */
- {0xE, 4}, /* 62 = 1500s */
- {0xF, 4} /* 63 = 1600s */
-};
-
-#define SBC8360_ENABLE 0x120
-#define SBC8360_BASETIME 0x121
-
-static int timeout = 27;
-static int wd_margin = 0xB;
-static int wd_multiplier = 2;
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Index into timeout table (0-63) (default=27 (60s))");
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout,
- "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Kernel methods.
- */
-
-/* Activate and pre-configure watchdog */
-static void sbc8360_activate(void)
-{
- /* Enable the watchdog */
- outb(0x0A, SBC8360_ENABLE);
- msleep_interruptible(100);
- outb(0x0B, SBC8360_ENABLE);
- msleep_interruptible(100);
- /* Set timeout multiplier */
- outb(wd_multiplier, SBC8360_ENABLE);
- msleep_interruptible(100);
- /* Nothing happens until first sbc8360_ping() */
-}
-
-/* Kernel pings watchdog */
-static void sbc8360_ping(void)
-{
- /* Write the base timer register */
- outb(wd_margin, SBC8360_BASETIME);
-}
-
-/* Userspace pings kernel driver, or requests clean close */
-static ssize_t sbc8360_write(struct file *file, const char __user * buf,
- size_t count, loff_t * ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- sbc8360_ping();
- }
- return count;
-}
-
-static int sbc8360_open(struct inode *inode, struct file *file)
-{
- spin_lock(&sbc8360_lock);
- if (test_and_set_bit(0, &sbc8360_is_open)) {
- spin_unlock(&sbc8360_lock);
- return -EBUSY;
- }
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate and ping once to start the countdown */
- spin_unlock(&sbc8360_lock);
- sbc8360_activate();
- sbc8360_ping();
- return nonseekable_open(inode, file);
-}
-
-static int sbc8360_close(struct inode *inode, struct file *file)
-{
- spin_lock(&sbc8360_lock);
- if (expect_close == 42)
- outb(0, SBC8360_ENABLE);
- else
- printk(KERN_CRIT PFX
- "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
-
- clear_bit(0, &sbc8360_is_open);
- expect_close = 0;
- spin_unlock(&sbc8360_lock);
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int sbc8360_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Disable the SBC8360 Watchdog */
- outb(0, SBC8360_ENABLE);
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations sbc8360_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = sbc8360_write,
- .open = sbc8360_open,
- .release = sbc8360_close,
-};
-
-static struct miscdevice sbc8360_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &sbc8360_fops,
-};
-
-/*
- * The SBC8360 needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block sbc8360_notifier = {
- .notifier_call = sbc8360_notify_sys,
-};
-
-static int __init sbc8360_init(void)
-{
- int res;
- unsigned long int mseconds = 60000;
-
- if (timeout < 0 || timeout > 63) {
- printk(KERN_ERR PFX "Invalid timeout index (must be 0-63).\n");
- res = -EINVAL;
- goto out;
- }
-
- if (!request_region(SBC8360_ENABLE, 1, "SBC8360")) {
- printk(KERN_ERR PFX "ENABLE method I/O %X is not available.\n",
- SBC8360_ENABLE);
- res = -EIO;
- goto out;
- }
- if (!request_region(SBC8360_BASETIME, 1, "SBC8360")) {
- printk(KERN_ERR PFX
- "BASETIME method I/O %X is not available.\n",
- SBC8360_BASETIME);
- res = -EIO;
- goto out_nobasetimereg;
- }
-
- res = register_reboot_notifier(&sbc8360_notifier);
- if (res) {
- printk(KERN_ERR PFX "Failed to register reboot notifier.\n");
- goto out_noreboot;
- }
-
- spin_lock_init(&sbc8360_lock);
- res = misc_register(&sbc8360_miscdev);
- if (res) {
- printk(KERN_ERR PFX "failed to register misc device\n");
- goto out_nomisc;
- }
-
- wd_margin = wd_times[timeout][0];
- wd_multiplier = wd_times[timeout][1];
-
- if (wd_multiplier == 1)
- mseconds = (wd_margin + 1) * 500;
- else if (wd_multiplier == 2)
- mseconds = (wd_margin + 1) * 5000;
- else if (wd_multiplier == 3)
- mseconds = (wd_margin + 1) * 50000;
- else if (wd_multiplier == 4)
- mseconds = (wd_margin + 1) * 100000;
-
- /* My kingdom for the ability to print "0.5 seconds" in the kernel! */
- printk(KERN_INFO PFX "Timeout set at %ld ms.\n", mseconds);
-
- return 0;
-
- out_nomisc:
- unregister_reboot_notifier(&sbc8360_notifier);
- out_noreboot:
- release_region(SBC8360_BASETIME, 1);
- out_nobasetimereg:
- release_region(SBC8360_ENABLE, 1);
- out:
- return res;
-}
-
-static void __exit sbc8360_exit(void)
-{
- misc_deregister(&sbc8360_miscdev);
- unregister_reboot_notifier(&sbc8360_notifier);
- release_region(SBC8360_ENABLE, 1);
- release_region(SBC8360_BASETIME, 1);
-}
-
-module_init(sbc8360_init);
-module_exit(sbc8360_exit);
-
-MODULE_AUTHOR("Ian E. Morgan <imorgan@webcon.ca>");
-MODULE_DESCRIPTION("SBC8360 watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.01");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-/* end of sbc8360.c */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 05:02:39 +0000