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Diffstat (limited to 'drivers/watchdog/cpwd.c')
-rw-r--r--drivers/watchdog/cpwd.c101
1 files changed, 51 insertions, 50 deletions
diff --git a/drivers/watchdog/cpwd.c b/drivers/watchdog/cpwd.c
index 084dfe9cecfb..41070e4771a0 100644
--- a/drivers/watchdog/cpwd.c
+++ b/drivers/watchdog/cpwd.c
@@ -1,13 +1,13 @@
/* cpwd.c - driver implementation for hardware watchdog
* timers found on Sun Microsystems CP1400 and CP1500 boards.
*
- * This device supports both the generic Linux watchdog
+ * This device supports both the generic Linux watchdog
* interface and Solaris-compatible ioctls as best it is
* able.
*
* NOTE: CP1400 systems appear to have a defective intr_mask
* register on the PLD, preventing the disabling of
- * timer interrupts. We use a timer to periodically
+ * timer interrupts. We use a timer to periodically
* reset 'stopped' watchdogs on affected platforms.
*
* Copyright (c) 2000 Eric Brower (ebrower@usa.net)
@@ -28,10 +28,9 @@
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/uaccess.h>
#include <asm/irq.h>
-#include <asm/uaccess.h>
-
#include <asm/watchdog.h>
#define DRIVER_NAME "cpwd"
@@ -43,8 +42,8 @@
#define WD_BLIMIT 0xFFFF
#define WD0_MINOR 212
-#define WD1_MINOR 213
-#define WD2_MINOR 214
+#define WD1_MINOR 213
+#define WD2_MINOR 214
/* Internal driver definitions. */
#define WD0_ID 0
@@ -91,16 +90,16 @@ struct cpwd {
static struct cpwd *cpwd_device;
-/* Sun uses Altera PLD EPF8820ATC144-4
+/* Sun uses Altera PLD EPF8820ATC144-4
* providing three hardware watchdogs:
*
- * 1) RIC - sends an interrupt when triggered
- * 2) XIR - asserts XIR_B_RESET when triggered, resets CPU
- * 3) POR - asserts POR_B_RESET when triggered, resets CPU, backplane, board
+ * 1) RIC - sends an interrupt when triggered
+ * 2) XIR - asserts XIR_B_RESET when triggered, resets CPU
+ * 3) POR - asserts POR_B_RESET when triggered, resets CPU, backplane, board
*
*** Timer register block definition (struct wd_timer_regblk)
*
- * dcntr and limit registers (halfword access):
+ * dcntr and limit registers (halfword access):
* -------------------
* | 15 | ...| 1 | 0 |
* -------------------
@@ -108,7 +107,8 @@ static struct cpwd *cpwd_device;
* -------------------
* dcntr - Current 16-bit downcounter value.
* When downcounter reaches '0' watchdog expires.
- * Reading this register resets downcounter with 'limit' value.
+ * Reading this register resets downcounter with
+ * 'limit' value.
* limit - 16-bit countdown value in 1/10th second increments.
* Writing this register begins countdown with input value.
* Reading from this register does not affect counter.
@@ -158,11 +158,11 @@ static int wd0_timeout = 0;
static int wd1_timeout = 0;
static int wd2_timeout = 0;
-module_param (wd0_timeout, int, 0);
+module_param(wd0_timeout, int, 0);
MODULE_PARM_DESC(wd0_timeout, "Default watchdog0 timeout in 1/10secs");
-module_param (wd1_timeout, int, 0);
+module_param(wd1_timeout, int, 0);
MODULE_PARM_DESC(wd1_timeout, "Default watchdog1 timeout in 1/10secs");
-module_param (wd2_timeout, int, 0);
+module_param(wd2_timeout, int, 0);
MODULE_PARM_DESC(wd2_timeout, "Default watchdog2 timeout in 1/10secs");
MODULE_AUTHOR("Eric Brower <ebrower@usa.net>");
@@ -201,9 +201,9 @@ static u8 cpwd_readb(void __iomem *addr)
static void cpwd_toggleintr(struct cpwd *p, int index, int enable)
{
unsigned char curregs = cpwd_readb(p->regs + PLD_IMASK);
- unsigned char setregs =
- (index == -1) ?
- (WD0_INTR_MASK | WD1_INTR_MASK | WD2_INTR_MASK) :
+ unsigned char setregs =
+ (index == -1) ?
+ (WD0_INTR_MASK | WD1_INTR_MASK | WD2_INTR_MASK) :
(p->devs[index].intr_mask);
if (enable == WD_INTR_ON)
@@ -303,24 +303,24 @@ static int cpwd_getstatus(struct cpwd *p, int index)
unsigned char ret = WD_STOPPED;
/* determine STOPPED */
- if (!stat)
+ if (!stat)
return ret;
/* determine EXPIRED vs FREERUN vs RUNNING */
else if (WD_S_EXPIRED & stat) {
ret = WD_EXPIRED;
- } else if(WD_S_RUNNING & stat) {
+ } else if (WD_S_RUNNING & stat) {
if (intr & p->devs[index].intr_mask) {
ret = WD_FREERUN;
} else {
/* Fudge WD_EXPIRED status for defective CP1400--
- * IF timer is running
- * AND brokenstop is set
+ * IF timer is running
+ * AND brokenstop is set
* AND an interrupt has been serviced
* we are WD_EXPIRED.
*
- * IF timer is running
- * AND brokenstop is set
+ * IF timer is running
+ * AND brokenstop is set
* AND no interrupt has been serviced
* we are WD_FREERUN.
*/
@@ -329,7 +329,8 @@ static int cpwd_getstatus(struct cpwd *p, int index)
if (p->devs[index].runstatus & WD_STAT_SVCD) {
ret = WD_EXPIRED;
} else {
- /* we could as well pretend we are expired */
+ /* we could as well pretend
+ * we are expired */
ret = WD_FREERUN;
}
} else {
@@ -342,7 +343,7 @@ static int cpwd_getstatus(struct cpwd *p, int index)
if (p->devs[index].runstatus & WD_STAT_SVCD)
ret |= WD_SERVICED;
- return(ret);
+ return ret;
}
static irqreturn_t cpwd_interrupt(int irq, void *dev_id)
@@ -367,22 +368,22 @@ static int cpwd_open(struct inode *inode, struct file *f)
struct cpwd *p = cpwd_device;
lock_kernel();
- switch(iminor(inode)) {
- case WD0_MINOR:
- case WD1_MINOR:
- case WD2_MINOR:
- break;
+ switch (iminor(inode)) {
+ case WD0_MINOR:
+ case WD1_MINOR:
+ case WD2_MINOR:
+ break;
- default:
- unlock_kernel();
- return -ENODEV;
+ default:
+ unlock_kernel();
+ return -ENODEV;
}
/* Register IRQ on first open of device */
if (!p->initialized) {
- if (request_irq(p->irq, &cpwd_interrupt,
+ if (request_irq(p->irq, &cpwd_interrupt,
IRQF_SHARED, DRIVER_NAME, p)) {
- printk(KERN_ERR PFX "Cannot register IRQ %d\n",
+ printk(KERN_ERR PFX "Cannot register IRQ %d\n",
p->irq);
unlock_kernel();
return -EBUSY;
@@ -400,8 +401,7 @@ static int cpwd_release(struct inode *inode, struct file *file)
return 0;
}
-static int cpwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long cpwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
static struct watchdog_info info = {
.options = WDIOF_SETTIMEOUT,
@@ -409,6 +409,7 @@ static int cpwd_ioctl(struct inode *inode, struct file *file,
.identity = DRIVER_NAME,
};
void __user *argp = (void __user *)arg;
+ struct inode *inode = file->f_path.dentry->d_inode;
int index = iminor(inode) - WD0_MINOR;
struct cpwd *p = cpwd_device;
int setopt = 0;
@@ -442,7 +443,7 @@ static int cpwd_ioctl(struct inode *inode, struct file *file,
cpwd_starttimer(p, index);
} else {
return -EINVAL;
- }
+ }
break;
/* Solaris-compatible IOCTLs */
@@ -458,7 +459,7 @@ static int cpwd_ioctl(struct inode *inode, struct file *file,
case WIOCSTOP:
if (p->enabled)
- return(-EINVAL);
+ return -EINVAL;
cpwd_stoptimer(p, index);
break;
@@ -481,7 +482,7 @@ static long cpwd_compat_ioctl(struct file *file, unsigned int cmd,
case WIOCSTOP:
case WIOCGSTAT:
lock_kernel();
- rval = cpwd_ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
+ rval = cpwd_ioctl(file, cmd, arg);
unlock_kernel();
break;
@@ -493,7 +494,7 @@ static long cpwd_compat_ioctl(struct file *file, unsigned int cmd,
return rval;
}
-static ssize_t cpwd_write(struct file *file, const char __user *buf,
+static ssize_t cpwd_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct inode *inode = file->f_path.dentry->d_inode;
@@ -508,20 +509,20 @@ static ssize_t cpwd_write(struct file *file, const char __user *buf,
return 0;
}
-static ssize_t cpwd_read(struct file * file, char __user *buffer,
+static ssize_t cpwd_read(struct file *file, char __user *buffer,
size_t count, loff_t *ppos)
{
return -EINVAL;
}
static const struct file_operations cpwd_fops = {
- .owner = THIS_MODULE,
- .ioctl = cpwd_ioctl,
- .compat_ioctl = cpwd_compat_ioctl,
- .open = cpwd_open,
- .write = cpwd_write,
- .read = cpwd_read,
- .release = cpwd_release,
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = cpwd_ioctl,
+ .compat_ioctl = cpwd_compat_ioctl,
+ .open = cpwd_open,
+ .write = cpwd_write,
+ .read = cpwd_read,
+ .release = cpwd_release,
};
static int __devinit cpwd_probe(struct of_device *op,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 03:42:56 +0100