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path: root/drivers/watchdog/advantechwdt.c
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Diffstat (limited to 'drivers/watchdog/advantechwdt.c')
-rw-r--r--drivers/watchdog/advantechwdt.c162
1 files changed, 76 insertions, 86 deletions
diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c
index 8121cc247343..a5110f93a755 100644
--- a/drivers/watchdog/advantechwdt.c
+++ b/drivers/watchdog/advantechwdt.c
@@ -37,9 +37,9 @@
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#define DRV_NAME "advantechwdt"
@@ -47,7 +47,8 @@
#define WATCHDOG_NAME "Advantech WDT"
#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
-static struct platform_device *advwdt_platform_device; /* the watchdog platform device */
+/* the watchdog platform device */
+static struct platform_device *advwdt_platform_device;
static unsigned long advwdt_is_open;
static char adv_expect_close;
@@ -72,35 +73,35 @@ MODULE_PARM_DESC(wdt_start, "Advantech WDT 'start' io port (default 0x443)");
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. 1<= timeout <=63, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
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) ")");
/*
* Watchdog Operations
*/
-static void
-advwdt_ping(void)
+static void advwdt_ping(void)
{
/* Write a watchdog value */
outb_p(timeout, wdt_start);
}
-static void
-advwdt_disable(void)
+static void advwdt_disable(void)
{
inb_p(wdt_stop);
}
-static int
-advwdt_set_heartbeat(int t)
+static int advwdt_set_heartbeat(int t)
{
- if ((t < 1) || (t > 63))
+ if (t < 1 || t > 63)
return -EINVAL;
-
timeout = t;
return 0;
}
@@ -109,8 +110,8 @@ advwdt_set_heartbeat(int t)
* /dev/watchdog handling
*/
-static ssize_t
-advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t advwdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -120,7 +121,7 @@ advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *pp
for (i = 0; i != count; i++) {
char c;
- if (get_user(c, buf+i))
+ if (get_user(c, buf + i))
return -EFAULT;
if (c == 'V')
adv_expect_close = 42;
@@ -131,9 +132,7 @@ advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *pp
return count;
}
-static int
-advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long advwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int new_timeout;
void __user *argp = (void __user *)arg;
@@ -146,57 +145,50 @@ advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
+ 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:
- advwdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if (advwdt_set_heartbeat(new_timeout))
- return -EINVAL;
- advwdt_ping();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
+ return put_user(0, p);
case WDIOC_SETOPTIONS:
{
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- advwdt_disable();
- retval = 0;
- }
+ int options, retval = -EINVAL;
- if (options & WDIOS_ENABLECARD) {
- advwdt_ping();
- retval = 0;
- }
-
- return retval;
+ if (get_user(options, p))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ advwdt_disable();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ advwdt_ping();
+ retval = 0;
+ }
+ return retval;
}
+ case WDIOC_KEEPALIVE:
+ advwdt_ping();
+ break;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (advwdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+ advwdt_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
default:
- return -ENOTTY;
+ return -ENOTTY;
}
return 0;
}
-static int
-advwdt_open(struct inode *inode, struct file *file)
+static int advwdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &advwdt_is_open))
return -EBUSY;
@@ -208,13 +200,13 @@ advwdt_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
-static int
-advwdt_close(struct inode *inode, struct file *file)
+static int advwdt_close(struct inode *inode, struct file *file)
{
if (adv_expect_close == 42) {
advwdt_disable();
} else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
advwdt_ping();
}
clear_bit(0, &advwdt_is_open);
@@ -230,7 +222,7 @@ static const struct file_operations advwdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = advwdt_write,
- .ioctl = advwdt_ioctl,
+ .unlocked_ioctl = advwdt_ioctl,
.open = advwdt_open,
.release = advwdt_close,
};
@@ -245,23 +237,24 @@ static struct miscdevice advwdt_miscdev = {
* Init & exit routines
*/
-static int __devinit
-advwdt_probe(struct platform_device *dev)
+static int __devinit advwdt_probe(struct platform_device *dev)
{
int ret;
if (wdt_stop != wdt_start) {
if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_stop);
ret = -EIO;
goto out;
}
}
if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_start);
ret = -EIO;
goto unreg_stop;
}
@@ -269,20 +262,19 @@ advwdt_probe(struct platform_device *dev)
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if (advwdt_set_heartbeat(timeout)) {
advwdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n",
- timeout);
+ printk(KERN_INFO PFX
+ "timeout value must be 1<=x<=63, using %d\n", timeout);
}
ret = misc_register(&advwdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_regions;
}
-
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
-
out:
return ret;
unreg_regions:
@@ -293,19 +285,17 @@ unreg_stop:
goto out;
}
-static int __devexit
-advwdt_remove(struct platform_device *dev)
+static int __devexit advwdt_remove(struct platform_device *dev)
{
misc_deregister(&advwdt_miscdev);
- release_region(wdt_start,1);
- if(wdt_stop != wdt_start)
- release_region(wdt_stop,1);
+ release_region(wdt_start, 1);
+ if (wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
return 0;
}
-static void
-advwdt_shutdown(struct platform_device *dev)
+static void advwdt_shutdown(struct platform_device *dev)
{
/* Turn the WDT off if we have a soft shutdown */
advwdt_disable();
@@ -321,18 +311,19 @@ static struct platform_driver advwdt_driver = {
},
};
-static int __init
-advwdt_init(void)
+static int __init advwdt_init(void)
{
int err;
- printk(KERN_INFO "WDT driver for Advantech single board computer initialising.\n");
+ printk(KERN_INFO
+ "WDT driver for Advantech single board computer initialising.\n");
err = platform_driver_register(&advwdt_driver);
if (err)
return err;
- advwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ advwdt_platform_device = platform_device_register_simple(DRV_NAME,
+ -1, NULL, 0);
if (IS_ERR(advwdt_platform_device)) {
err = PTR_ERR(advwdt_platform_device);
goto unreg_platform_driver;
@@ -345,8 +336,7 @@ unreg_platform_driver:
return err;
}
-static void __exit
-advwdt_exit(void)
+static void __exit advwdt_exit(void)
{
platform_device_unregister(advwdt_platform_device);
platform_driver_unregister(&advwdt_driver);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 18:15:42 +0100