Update of /cvsroot/linux-mips/linux/drivers/char
In directory usw-pr-cvs1:/tmp/cvs-serv26996/drivers/char
Modified Files:
Config.in Makefile
Added Files:
indydog.c
Log Message:
IP22 watchdog.
--- NEW FILE: indydog.c ---
/*
* IndyDog 0.2 A Hardware Watchdog Device for SGI IP22
*
* (c) Copyright 2002 Guido Guenther <ag...@si...>, All Rights Reserved.
*
* 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.
*
* based on softdog.c by Alan Cox <al...@re...>
*/
#include <linux/module.h>
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <asm/sgi/sgimc.h>
static int indydog_alive;
static struct sgimc_misc_ctrl *mcmisc_regs;
static void indydog_ping()
{
mcmisc_regs->watchdogt = 0;
}
/*
* Allow only one person to hold it open
*/
static int indydog_open(struct inode *inode, struct file *file)
{
u32 mc_ctrl0;
if(indydog_alive)
return -EBUSY;
#ifdef CONFIG_WATCHDOG_NOWAYOUT
MOD_INC_USE_COUNT;
#endif
/*
* Activate timer
*/
mcmisc_regs = (struct sgimc_misc_ctrl *)(KSEG1+0x1fa00000);
mc_ctrl0 = mcmisc_regs->cpuctrl0 | SGIMC_CCTRL0_WDOG;
mcmisc_regs->cpuctrl0 = mc_ctrl0;
indydog_ping();
indydog_alive=1;
printk("Started watchdog timer.\n");
return 0;
}
static int indydog_release(struct inode *inode, struct file *file)
{
/*
* Shut off the timer.
* Lock it in if it's a module and we defined ...NOWAYOUT
*/
lock_kernel();
#ifndef CONFIG_WATCHDOG_NOWAYOUT
{
u32 mc_ctrl0 = mcmisc_regs->cpuctrl0;
mc_ctrl0 &= ~SGIMC_CCTRL0_WDOG;
mcmisc_regs->cpuctrl0 = mc_ctrl0;
printk("Stopped watchdog timer.\n");
}
#endif
indydog_alive=0;
unlock_kernel();
return 0;
}
static ssize_t indydog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
{
/* Can't seek (pwrite) on this device */
if (ppos != &file->f_pos)
return -ESPIPE;
/*
* Refresh the timer.
*/
if(len) {
indydog_ping();
return 1;
}
return 0;
}
static int indydog_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
static struct watchdog_info ident = {
identity: "Hardware Watchdog for SGI IP22",
};
switch (cmd) {
default:
return -ENOIOCTLCMD;
case WDIOC_GETSUPPORT:
if(copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident)))
return -EFAULT;
return 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0,(int *)arg);
case WDIOC_KEEPALIVE:
indydog_ping();
return 0;
}
}
static struct file_operations indydog_fops = {
owner: THIS_MODULE,
write: indydog_write,
ioctl: indydog_ioctl,
open: indydog_open,
release: indydog_release,
};
static struct miscdevice indydog_miscdev = {
minor: WATCHDOG_MINOR,
name: "watchdog",
fops: &indydog_fops,
};
static const char banner[] __initdata = KERN_INFO "Hardware Watchdog Timer for SGI IP22: 0.2\n";
static int __init watchdog_init(void)
{
int ret;
ret = misc_register(&indydog_miscdev);
if (ret)
return ret;
printk(banner);
return 0;
}
static void __exit watchdog_exit(void)
{
misc_deregister(&indydog_miscdev);
}
module_init(watchdog_init);
module_exit(watchdog_exit);
MODULE_LICENSE("GPL");
Index: Config.in
===================================================================
RCS file: /cvsroot/linux-mips/linux/drivers/char/Config.in,v
retrieving revision 1.30
retrieving revision 1.31
diff -u -d -r1.30 -r1.31
--- Config.in 18 Jan 2002 21:22:22 -0000 1.30
+++ Config.in 26 Feb 2002 17:46:06 -0000 1.31
@@ -207,6 +207,7 @@
tristate ' W83877F (EMACS) Watchdog Timer' CONFIG_W83877F_WDT
tristate ' ZF MachZ Watchdog' CONFIG_MACHZ_WDT
dep_tristate ' NEC VR41xx Watchdog (DSU)' CONFIG_VR41XX_WDT $CONFIG_CPU_VR41XX
+ dep_tristate ' Indy/I2 Hardware Watchdog' CONFIG_INDYDOG $CONFIG_SGI_IP22
fi
endmenu
Index: Makefile
===================================================================
RCS file: /cvsroot/linux-mips/linux/drivers/char/Makefile,v
retrieving revision 1.25
retrieving revision 1.26
diff -u -d -r1.25 -r1.26
--- Makefile 18 Jan 2002 21:22:23 -0000 1.25
+++ Makefile 26 Feb 2002 17:46:07 -0000 1.26
@@ -256,6 +256,7 @@
obj-$(CONFIG_SH_WDT) += shwdt.o
obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
+obj-$(CONFIG_INDYDOG) += indydog.o
obj-$(CONFIG_VR41XX_WDT) += vr41xxwdt.o
subdir-$(CONFIG_MWAVE) += mwave
|
