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yaml
---
r: 107821
b: refs/heads/master
c: 3930964
h: refs/heads/master
i:
  107819: 1615775
v: v3
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Alan Cox authored and Wim Van Sebroeck committed Jun 13, 2008
1 parent 3e15cb3 commit f7133cc
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Showing 2 changed files with 64 additions and 71 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 325ea4d3a8a90b19d7a076714d0f8f238a5a6a69
refs/heads/master: 3930964532f8e454910cbe0d9909e98a02d9f552
133 changes: 63 additions & 70 deletions trunk/drivers/watchdog/mixcomwd.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,8 @@
* - support for one more type board
*
* Version 0.5 (2001/12/14) Matt Domsch <Matt_Domsch@dell.com>
* - added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
* - added nowayout module option to override
* CONFIG_WATCHDOG_NOWAYOUT
*
* Version 0.6 (2002/04/12): Rob Radez <rob@osinvestor.com>
* - make mixcomwd_opened unsigned,
Expand All @@ -53,8 +54,8 @@
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/uaccess.h>
#include <linux/io.h>

/*
* We have two types of cards that can be probed:
Expand Down Expand Up @@ -108,18 +109,19 @@ static char expect_close;

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) ")");
MODULE_PARM_DESC(nowayout,
"Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");

static void mixcomwd_ping(void)
{
outb_p(55,watchdog_port);
outb_p(55, watchdog_port);
return;
}

static void mixcomwd_timerfun(unsigned long d)
{
mixcomwd_ping();

mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
}

Expand All @@ -129,22 +131,22 @@ static void mixcomwd_timerfun(unsigned long d)

static int mixcomwd_open(struct inode *inode, struct file *file)
{
if(test_and_set_bit(0,&mixcomwd_opened)) {
if (test_and_set_bit(0, &mixcomwd_opened))
return -EBUSY;
}

mixcomwd_ping();

if (nowayout) {
if (nowayout)
/*
* fops_get() code via open() has already done
* a try_module_get() so it is safe to do the
* __module_get().
*/
__module_get(THIS_MODULE);
} else {
if(mixcomwd_timer_alive) {
else {
if (mixcomwd_timer_alive) {
del_timer(&mixcomwd_timer);
mixcomwd_timer_alive=0;
mixcomwd_timer_alive = 0;
}
}
return nonseekable_open(inode, file);
Expand All @@ -153,26 +155,27 @@ static int mixcomwd_open(struct inode *inode, struct file *file)
static int mixcomwd_release(struct inode *inode, struct file *file)
{
if (expect_close == 42) {
if(mixcomwd_timer_alive) {
printk(KERN_ERR PFX "release called while internal timer alive");
if (mixcomwd_timer_alive) {
printk(KERN_ERR PFX
"release called while internal timer alive");
return -EBUSY;
}
mixcomwd_timer_alive=1;
mixcomwd_timer_alive = 1;
mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
} else {
printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
}
} else
printk(KERN_CRIT PFX
"WDT device closed unexpectedly. WDT will not stop!\n");

clear_bit(0,&mixcomwd_opened);
expect_close=0;
clear_bit(0, &mixcomwd_opened);
expect_close = 0;
return 0;
}


static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
static ssize_t mixcomwd_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
if(len)
{
if (len) {
if (!nowayout) {
size_t i;

Expand All @@ -192,8 +195,8 @@ static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t
return len;
}

static int mixcomwd_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
static long mixcomwd_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
Expand All @@ -204,32 +207,23 @@ static int mixcomwd_ioctl(struct inode *inode, struct file *file,
.identity = "MixCOM watchdog",
};

switch(cmd)
{
case WDIOC_GETSTATUS:
status=mixcomwd_opened;
if (!nowayout) {
status|=mixcomwd_timer_alive;
}
if (copy_to_user(p, &status, sizeof(int))) {
return -EFAULT;
}
break;
case WDIOC_GETBOOTSTATUS:
if (copy_to_user(p, &status, sizeof(int))) {
return -EFAULT;
}
break;
case WDIOC_GETSUPPORT:
if (copy_to_user(argp, &ident, sizeof(ident))) {
return -EFAULT;
}
break;
case WDIOC_KEEPALIVE:
mixcomwd_ping();
break;
default:
return -ENOTTY;
switch (cmd) {
case WDIOC_GETSTATUS:
status = mixcomwd_opened;
if (!nowayout)
status |= mixcomwd_timer_alive;
return put_user(status, p);
case WDIOC_GETBOOTSTATUS:
return put_user(0, p);
case WDIOC_GETSUPPORT:
if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
case WDIOC_KEEPALIVE:
mixcomwd_ping();
break;
default:
return -ENOTTY;
}
return 0;
}
Expand All @@ -238,7 +232,7 @@ static const struct file_operations mixcomwd_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mixcomwd_write,
.ioctl = mixcomwd_ioctl,
.unlocked_ioctl = mixcomwd_ioctl,
.open = mixcomwd_open,
.release = mixcomwd_release,
};
Expand All @@ -253,15 +247,14 @@ static int __init checkcard(int port, int card_id)
{
int id;

if (!request_region(port, 1, "MixCOM watchdog")) {
if (!request_region(port, 1, "MixCOM watchdog"))
return 0;
}

id=inb_p(port);
if (card_id==MIXCOM_ID)
id = inb_p(port);
if (card_id == MIXCOM_ID)
id &= 0x3f;

if (id!=card_id) {
if (id != card_id) {
release_region(port, 1);
return 0;
}
Expand All @@ -270,9 +263,7 @@ static int __init checkcard(int port, int card_id)

static int __init mixcomwd_init(void)
{
int i;
int ret;
int found=0;
int i, ret, found = 0;

for (i = 0; !found && mixcomwd_io_info[i].ioport != 0; i++) {
if (checkcard(mixcomwd_io_info[i].ioport,
Expand All @@ -283,20 +274,22 @@ static int __init mixcomwd_init(void)
}

if (!found) {
printk(KERN_ERR PFX "No card detected, or port not available.\n");
printk(KERN_ERR PFX
"No card detected, or port not available.\n");
return -ENODEV;
}

ret = misc_register(&mixcomwd_miscdev);
if (ret)
{
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
if (ret) {
printk(KERN_ERR PFX
"cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
goto error_misc_register_watchdog;
}

printk(KERN_INFO "MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
VERSION, watchdog_port);
printk(KERN_INFO
"MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
VERSION, watchdog_port);

return 0;

Expand All @@ -309,15 +302,15 @@ static int __init mixcomwd_init(void)
static void __exit mixcomwd_exit(void)
{
if (!nowayout) {
if(mixcomwd_timer_alive) {
if (mixcomwd_timer_alive) {
printk(KERN_WARNING PFX "I quit now, hardware will"
" probably reboot!\n");
del_timer_sync(&mixcomwd_timer);
mixcomwd_timer_alive=0;
mixcomwd_timer_alive = 0;
}
}
misc_deregister(&mixcomwd_miscdev);
release_region(watchdog_port,1);
release_region(watchdog_port, 1);
}

module_init(mixcomwd_init);
Expand Down

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