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linux-davinci
Commit cd3c1cde authored by Linus Torvalds's avatar Linus Torvalds
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  [WATCHDOG] orion5x_wdt.c: 'ORION5X_TCLK' undeclared
  [WATCHDOG] gef_wdt.c: fsl_get_sys_freq() failure not noticed
  [WATCHDOG] ks8695_wdt.c: 'CLOCK_TICK_RATE' undeclared
  [WATCHDOG] rc32434_wdt: fix sections
  [WATCHDOG] rc32434_wdt: fix watchdog driver
parents 5b61f6ac c9a0c8a6
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Showing with 72 additions and 100 deletions
drivers/watchdog/gef_wdt.c
View file @ cd3c1cde
......@@ -269,7 +269,7 @@ static int __devinit gef_wdt_probe(struct of_device *dev,
bus_clk = 133; /* in MHz */
freq = fsl_get_sys_freq();
if (freq > 0)
if (freq != -1)
bus_clk = freq;
/* Map devices registers into memory */
......
drivers/watchdog/ks8695_wdt.c
View file @ cd3c1cde
......@@ -21,6 +21,7 @@
#include <linux/watchdog.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <mach/timex.h>
#include <mach/regs-timer.h>
#define WDT_DEFAULT_TIME 5 /* seconds */
......
drivers/watchdog/orion5x_wdt.c
View file @ cd3c1cde
......@@ -29,6 +29,7 @@
#define WDT_EN 0x0010
#define WDT_VAL (TIMER_VIRT_BASE + 0x0024)
#define ORION5X_TCLK 166666667
#define WDT_MAX_DURATION (0xffffffff / ORION5X_TCLK)
#define WDT_IN_USE 0
#define WDT_OK_TO_CLOSE 1
......
drivers/watchdog/rc32434_wdt.c
View file @ cd3c1cde
......@@ -34,104 +34,89 @@
#include <asm/time.h>
#include <asm/mach-rc32434/integ.h>
#define MAX_TIMEOUT 20
#define RC32434_WDT_INTERVAL (15 * HZ)
#define VERSION "0.2"
#define VERSION "0.4"
static struct {
struct completion stop;
int running;
struct timer_list timer;
int queue;
int default_ticks;
unsigned long inuse;
} rc32434_wdt_device;
static struct integ __iomem *wdt_reg;
static int ticks = 100 * HZ;
static int expect_close;
static int timeout;
/* Board internal clock speed in Hz,
* the watchdog timer ticks at. */
extern unsigned int idt_cpu_freq;
/* translate wtcompare value to seconds and vice versa */
#define WTCOMP2SEC(x) (x / idt_cpu_freq)
#define SEC2WTCOMP(x) (x * idt_cpu_freq)
/* Use a default timeout of 20s. This should be
* safe for CPU clock speeds up to 400MHz, as
* ((2 ^ 32) - 1) / (400MHz / 2) = 21s. */
#define WATCHDOG_TIMEOUT 20
static int timeout = 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) ")");
/* apply or and nand masks to data read from addr and write back */
#define SET_BITS(addr, or, nand) \
writel((readl(&addr) | or) & ~nand, &addr)
static void rc32434_wdt_start(void)
{
u32 val;
if (!rc32434_wdt_device.inuse) {
writel(0, &wdt_reg->wtcount);
u32 or, nand;
val = RC32434_ERR_WRE;
writel(readl(&wdt_reg->errcs) | val, &wdt_reg->errcs);
/* zero the counter before enabling */
writel(0, &wdt_reg->wtcount);
val = RC32434_WTC_EN;
writel(readl(&wdt_reg->wtc) | val, &wdt_reg->wtc);
}
rc32434_wdt_device.running++;
}
/* don't generate a non-maskable interrupt,
* do a warm reset instead */
nand = 1 << RC32434_ERR_WNE;
or = 1 << RC32434_ERR_WRE;
static void rc32434_wdt_stop(void)
{
u32 val;
/* reset the ERRCS timeout bit in case it's set */
nand |= 1 << RC32434_ERR_WTO;
if (rc32434_wdt_device.running) {
SET_BITS(wdt_reg->errcs, or, nand);
val = ~RC32434_WTC_EN;
writel(readl(&wdt_reg->wtc) & val, &wdt_reg->wtc);
/* reset WTC timeout bit and enable WDT */
nand = 1 << RC32434_WTC_TO;
or = 1 << RC32434_WTC_EN;
val = ~RC32434_ERR_WRE;
writel(readl(&wdt_reg->errcs) & val, &wdt_reg->errcs);
SET_BITS(wdt_reg->wtc, or, nand);
}
rc32434_wdt_device.running = 0;
}
static void rc32434_wdt_stop(void)
{
/* Disable WDT */
SET_BITS(wdt_reg->wtc, 0, 1 << RC32434_WTC_EN);
}
static void rc32434_wdt_set(int new_timeout)
static int rc32434_wdt_set(int new_timeout)
{
u32 cmp = new_timeout * HZ;
u32 state, val;
int max_to = WTCOMP2SEC((u32)-1);
if (new_timeout < 0 || new_timeout > max_to) {
printk(KERN_ERR KBUILD_MODNAME
": timeout value must be between 0 and %d",
max_to);
return -EINVAL;
}
timeout = new_timeout;
/*
* store and disable WTC
*/
state = (u32)(readl(&wdt_reg->wtc) & RC32434_WTC_EN);
val = ~RC32434_WTC_EN;
writel(readl(&wdt_reg->wtc) & val, &wdt_reg->wtc);
writel(0, &wdt_reg->wtcount);
writel(cmp, &wdt_reg->wtcompare);
/*
* restore WTC
*/
writel(readl(&wdt_reg->wtc) | state, &wdt_reg);
}
writel(SEC2WTCOMP(timeout), &wdt_reg->wtcompare);
static void rc32434_wdt_reset(void)
{
ticks = rc32434_wdt_device.default_ticks;
return 0;
}
static void rc32434_wdt_update(unsigned long unused)
static void rc32434_wdt_ping(void)
{
if (rc32434_wdt_device.running)
ticks--;
writel(0, &wdt_reg->wtcount);
if (rc32434_wdt_device.queue && ticks)
mod_timer(&rc32434_wdt_device.timer,
jiffies + RC32434_WDT_INTERVAL);
else
complete(&rc32434_wdt_device.stop);
}
static int rc32434_wdt_open(struct inode *inode, struct file *file)
......@@ -142,19 +127,23 @@ static int rc32434_wdt_open(struct inode *inode, struct file *file)
if (nowayout)
__module_get(THIS_MODULE);
rc32434_wdt_start();
rc32434_wdt_ping();
return nonseekable_open(inode, file);
}
static int rc32434_wdt_release(struct inode *inode, struct file *file)
{
if (expect_close && nowayout == 0) {
if (expect_close == 42) {
rc32434_wdt_stop();
printk(KERN_INFO KBUILD_MODNAME ": disabling watchdog timer\n");
module_put(THIS_MODULE);
} else
} else {
printk(KERN_CRIT KBUILD_MODNAME
": device closed unexpectedly. WDT will not stop !\n");
rc32434_wdt_ping();
}
clear_bit(0, &rc32434_wdt_device.inuse);
return 0;
}
......@@ -174,10 +163,10 @@ static ssize_t rc32434_wdt_write(struct file *file, const char *data,
if (get_user(c, data + i))
return -EFAULT;
if (c == 'V')
expect_close = 1;
expect_close = 42;
}
}
rc32434_wdt_update(0);
rc32434_wdt_ping();
return len;
}
return 0;
......@@ -197,11 +186,11 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
};
switch (cmd) {
case WDIOC_KEEPALIVE:
rc32434_wdt_reset();
rc32434_wdt_ping();
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
value = readl(&wdt_reg->wtcount);
value = 0;
if (copy_to_user(argp, &value, sizeof(int)))
return -EFAULT;
break;
......@@ -218,6 +207,7 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
break;
case WDIOS_DISABLECARD:
rc32434_wdt_stop();
break;
default:
return -EINVAL;
}
......@@ -225,11 +215,9 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
case WDIOC_SETTIMEOUT:
if (copy_from_user(&new_timeout, argp, sizeof(int)))
return -EFAULT;
if (new_timeout < 1)
if (rc32434_wdt_set(new_timeout))
return -EINVAL;
if (new_timeout > MAX_TIMEOUT)
return -EINVAL;
rc32434_wdt_set(new_timeout);
/* Fall through */
case WDIOC_GETTIMEOUT:
return copy_to_user(argp, &timeout, sizeof(int));
default:
......@@ -254,15 +242,15 @@ static struct miscdevice rc32434_wdt_miscdev = {
.fops = &rc32434_wdt_fops,
};
static char banner[] = KERN_INFO KBUILD_MODNAME
static char banner[] __devinitdata = KERN_INFO KBUILD_MODNAME
": Watchdog Timer version " VERSION ", timer margin: %d sec\n";
static int rc32434_wdt_probe(struct platform_device *pdev)
static int __devinit rc32434_wdt_probe(struct platform_device *pdev)
{
int ret;
struct resource *r;
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rb500_wdt_res");
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rb532_wdt_res");
if (!r) {
printk(KERN_ERR KBUILD_MODNAME
"failed to retrieve resources\n");
......@@ -277,24 +265,12 @@ static int rc32434_wdt_probe(struct platform_device *pdev)
}
ret = misc_register(&rc32434_wdt_miscdev);
if (ret < 0) {
printk(KERN_ERR KBUILD_MODNAME
"failed to register watchdog device\n");
goto unmap;
}
init_completion(&rc32434_wdt_device.stop);
rc32434_wdt_device.queue = 0;
clear_bit(0, &rc32434_wdt_device.inuse);
setup_timer(&rc32434_wdt_device.timer, rc32434_wdt_update, 0L);
rc32434_wdt_device.default_ticks = ticks;
rc32434_wdt_start();
printk(banner, timeout);
return 0;
......@@ -304,23 +280,17 @@ unmap:
return ret;
}
static int rc32434_wdt_remove(struct platform_device *pdev)
static int __devexit rc32434_wdt_remove(struct platform_device *pdev)
{
if (rc32434_wdt_device.queue) {
rc32434_wdt_device.queue = 0;
wait_for_completion(&rc32434_wdt_device.stop);
}
misc_deregister(&rc32434_wdt_miscdev);
iounmap(wdt_reg);
return 0;
}
static struct platform_driver rc32434_wdt = {
.probe = rc32434_wdt_probe,
.remove = rc32434_wdt_remove,
.driver = {
.remove = __devexit_p(rc32434_wdt_remove),
.driver = {
.name = "rc32434_wdt",
}
};
......
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