mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-05 17:50:38 +02:00
2ac9a1a7b3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22851 3c298f89-4303-0410-b956-a3cf2f4a3e73
314 lines
8.3 KiB
Diff
314 lines
8.3 KiB
Diff
--- a/drivers/watchdog/rdc321x_wdt.c
|
|
+++ b/drivers/watchdog/rdc321x_wdt.c
|
|
@@ -36,111 +36,99 @@
|
|
#include <linux/watchdog.h>
|
|
#include <linux/io.h>
|
|
#include <linux/uaccess.h>
|
|
+#include <linux/pci.h>
|
|
+#include <linux/delay.h>
|
|
#include <linux/mfd/rdc321x.h>
|
|
|
|
-#define RDC_WDT_MASK 0x80000000 /* Mask */
|
|
+#define RDC321X_WDT_REG 0x00000044
|
|
+
|
|
#define RDC_WDT_EN 0x00800000 /* Enable bit */
|
|
-#define RDC_WDT_WTI 0x00200000 /* Generate CPU reset/NMI/WDT on timeout */
|
|
-#define RDC_WDT_RST 0x00100000 /* Reset bit */
|
|
-#define RDC_WDT_WIF 0x00040000 /* WDT IRQ Flag */
|
|
-#define RDC_WDT_IRT 0x00000100 /* IRQ Routing table */
|
|
-#define RDC_WDT_CNT 0x00000001 /* WDT count */
|
|
+#define RDC_WDT_WDTIRQ 0x00400000 /* Create WDT IRQ before CPU reset */
|
|
+#define RDC_WDT_NMIIRQ 0x00200000 /* Create NMI IRQ before CPU reset */
|
|
+#define RDC_WDT_RST 0x00100000 /* Reset wdt */
|
|
+#define RDC_WDT_NIF 0x00080000 /* NMI interrupt occured */
|
|
+#define RDC_WDT_WIF 0x00040000 /* WDT interrupt occured */
|
|
+#define RDC_WDT_IRT 0x00000700 /* IRQ Routing table */
|
|
+#define RDC_WDT_CNT 0x0000007F /* WDT count */
|
|
|
|
-#define RDC_CLS_TMR 0x80003844 /* Clear timer */
|
|
+/* default counter value (2.34 s) */
|
|
+#define RDC_WDT_DFLT_CNT 0x00000040
|
|
|
|
-#define RDC_WDT_INTERVAL (HZ/10+1)
|
|
+#define RDC_WDT_SETUP (RDC_WDT_EN | RDC_WDT_NMIIRQ | RDC_WDT_RST | RDC_WDT_DFLT_CNT)
|
|
|
|
static int ticks = 1000;
|
|
|
|
/* some device data */
|
|
|
|
static struct {
|
|
- struct completion stop;
|
|
- int running;
|
|
struct timer_list timer;
|
|
- int queue;
|
|
- int default_ticks;
|
|
- unsigned long inuse;
|
|
- spinlock_t lock;
|
|
+ int seconds_left;
|
|
+ int total_seconds;
|
|
+ bool inuse;
|
|
+ bool running;
|
|
+ bool close_expected;
|
|
+
|
|
struct pci_dev *sb_pdev;
|
|
int base_reg;
|
|
} rdc321x_wdt_device;
|
|
|
|
-/* generic helper functions */
|
|
+static struct watchdog_info ident = {
|
|
+ .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
|
|
+ .identity = "RDC321x WDT",
|
|
+};
|
|
+
|
|
|
|
-static void rdc321x_wdt_trigger(unsigned long unused)
|
|
+/* generic helper functions */
|
|
+static void rdc321x_wdt_timer(unsigned long unused)
|
|
{
|
|
- unsigned long flags;
|
|
- u32 val;
|
|
+ if (!rdc321x_wdt_device.running) {
|
|
+ pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
+ rdc321x_wdt_device.base_reg, 0);
|
|
+ return;
|
|
+ }
|
|
|
|
- if (rdc321x_wdt_device.running)
|
|
- ticks--;
|
|
+ rdc321x_wdt_device.seconds_left--;
|
|
|
|
- /* keep watchdog alive */
|
|
- spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
|
|
- pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
- rdc321x_wdt_device.base_reg, &val);
|
|
- val |= RDC_WDT_EN;
|
|
- pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
- rdc321x_wdt_device.base_reg, val);
|
|
- spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
|
|
+ if (rdc321x_wdt_device.seconds_left < 1)
|
|
+ return;
|
|
|
|
- /* requeue?? */
|
|
- if (rdc321x_wdt_device.queue && ticks)
|
|
- mod_timer(&rdc321x_wdt_device.timer,
|
|
- jiffies + RDC_WDT_INTERVAL);
|
|
- else {
|
|
- /* ticks doesn't matter anyway */
|
|
- complete(&rdc321x_wdt_device.stop);
|
|
- }
|
|
+ pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
+ rdc321x_wdt_device.base_reg, RDC_WDT_SETUP);
|
|
|
|
+ mod_timer(&rdc321x_wdt_device.timer, HZ * 2 + jiffies);
|
|
}
|
|
|
|
static void rdc321x_wdt_reset(void)
|
|
{
|
|
- ticks = rdc321x_wdt_device.default_ticks;
|
|
+ rdc321x_wdt_device.seconds_left = rdc321x_wdt_device.total_seconds;
|
|
}
|
|
|
|
static void rdc321x_wdt_start(void)
|
|
{
|
|
- unsigned long flags;
|
|
-
|
|
- if (!rdc321x_wdt_device.queue) {
|
|
- rdc321x_wdt_device.queue = 1;
|
|
-
|
|
- /* Clear the timer */
|
|
- spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
|
|
- pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
- rdc321x_wdt_device.base_reg, RDC_CLS_TMR);
|
|
-
|
|
- /* Enable watchdog and set the timeout to 81.92 us */
|
|
- pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
- rdc321x_wdt_device.base_reg,
|
|
- RDC_WDT_EN | RDC_WDT_CNT);
|
|
- spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
|
|
+ if (rdc321x_wdt_device.running)
|
|
+ return;
|
|
|
|
- mod_timer(&rdc321x_wdt_device.timer,
|
|
- jiffies + RDC_WDT_INTERVAL);
|
|
- }
|
|
+ rdc321x_wdt_device.seconds_left = rdc321x_wdt_device.total_seconds;
|
|
+ rdc321x_wdt_device.running = true;
|
|
+ rdc321x_wdt_timer(0);
|
|
|
|
- /* if process dies, counter is not decremented */
|
|
- rdc321x_wdt_device.running++;
|
|
+ return;
|
|
}
|
|
|
|
static int rdc321x_wdt_stop(void)
|
|
{
|
|
- if (rdc321x_wdt_device.running)
|
|
- rdc321x_wdt_device.running = 0;
|
|
+ if (WATCHDOG_NOWAYOUT)
|
|
+ return -ENOSYS;
|
|
|
|
- ticks = rdc321x_wdt_device.default_ticks;
|
|
+ rdc321x_wdt_device.running = false;
|
|
|
|
- return -EIO;
|
|
+ return 0;
|
|
}
|
|
|
|
/* filesystem operations */
|
|
static int rdc321x_wdt_open(struct inode *inode, struct file *file)
|
|
{
|
|
- if (test_and_set_bit(0, &rdc321x_wdt_device.inuse))
|
|
+ if (xchg(&rdc321x_wdt_device.inuse, true))
|
|
return -EBUSY;
|
|
|
|
return nonseekable_open(inode, file);
|
|
@@ -148,7 +136,16 @@ static int rdc321x_wdt_open(struct inode
|
|
|
|
static int rdc321x_wdt_release(struct inode *inode, struct file *file)
|
|
{
|
|
- clear_bit(0, &rdc321x_wdt_device.inuse);
|
|
+ int ret;
|
|
+
|
|
+ if (rdc321x_wdt_device.close_expected) {
|
|
+ ret = rdc321x_wdt_stop();
|
|
+ if (ret)
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ rdc321x_wdt_device.inuse = false;
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
@@ -156,30 +153,29 @@ static long rdc321x_wdt_ioctl(struct fil
|
|
unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
- u32 value;
|
|
- static struct watchdog_info ident = {
|
|
- .options = WDIOF_CARDRESET,
|
|
- .identity = "RDC321x WDT",
|
|
- };
|
|
- unsigned long flags;
|
|
+ int value;
|
|
|
|
switch (cmd) {
|
|
case WDIOC_KEEPALIVE:
|
|
rdc321x_wdt_reset();
|
|
break;
|
|
- case WDIOC_GETSTATUS:
|
|
- /* Read the value from the DATA register */
|
|
- spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
|
|
- pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
- rdc321x_wdt_device.base_reg, &value);
|
|
- spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
|
|
- if (copy_to_user(argp, &value, sizeof(u32)))
|
|
- return -EFAULT;
|
|
- break;
|
|
case WDIOC_GETSUPPORT:
|
|
if (copy_to_user(argp, &ident, sizeof(ident)))
|
|
return -EFAULT;
|
|
break;
|
|
+ case WDIOC_SETTIMEOUT:
|
|
+ if (copy_from_user(&rdc321x_wdt_device.total_seconds, argp, sizeof(int)))
|
|
+ return -EFAULT;
|
|
+ rdc321x_wdt_device.seconds_left = rdc321x_wdt_device.total_seconds;
|
|
+ break;
|
|
+ case WDIOC_GETTIMEOUT:
|
|
+ if (copy_to_user(argp, &rdc321x_wdt_device.total_seconds, sizeof(int)))
|
|
+ return -EFAULT;
|
|
+ break;
|
|
+ case WDIOC_GETTIMELEFT:
|
|
+ if (copy_to_user(argp, &rdc321x_wdt_device.seconds_left, sizeof(int)))
|
|
+ return -EFAULT;
|
|
+ break;
|
|
case WDIOC_SETOPTIONS:
|
|
if (copy_from_user(&value, argp, sizeof(int)))
|
|
return -EFAULT;
|
|
@@ -194,17 +190,34 @@ static long rdc321x_wdt_ioctl(struct fil
|
|
}
|
|
break;
|
|
default:
|
|
- return -ENOTTY;
|
|
+ return -EINVAL;
|
|
}
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
+ size_t i;
|
|
+
|
|
if (!count)
|
|
return -EIO;
|
|
|
|
+ rdc321x_wdt_device.close_expected = false;
|
|
+
|
|
+ for (i = 0; i != count; i++) {
|
|
+ char c;
|
|
+
|
|
+ if (get_user(c, buf + i))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (c == 'V') {
|
|
+ rdc321x_wdt_device.close_expected = true;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
rdc321x_wdt_reset();
|
|
|
|
return count;
|
|
@@ -246,27 +259,18 @@ static int __devinit rdc321x_wdt_probe(s
|
|
rdc321x_wdt_device.sb_pdev = pdata->sb_pdev;
|
|
rdc321x_wdt_device.base_reg = r->start;
|
|
|
|
+ rdc321x_wdt_device.running = false;
|
|
+ rdc321x_wdt_device.close_expected = false;
|
|
+ rdc321x_wdt_device.inuse = 0;
|
|
+ setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_timer, 0);
|
|
+ rdc321x_wdt_device.total_seconds = 100;
|
|
+
|
|
err = misc_register(&rdc321x_wdt_misc);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "misc_register failed\n");
|
|
return err;
|
|
}
|
|
|
|
- spin_lock_init(&rdc321x_wdt_device.lock);
|
|
-
|
|
- /* Reset the watchdog */
|
|
- pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
|
|
- rdc321x_wdt_device.base_reg, RDC_WDT_RST);
|
|
-
|
|
- init_completion(&rdc321x_wdt_device.stop);
|
|
- rdc321x_wdt_device.queue = 0;
|
|
-
|
|
- clear_bit(0, &rdc321x_wdt_device.inuse);
|
|
-
|
|
- setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
|
|
-
|
|
- rdc321x_wdt_device.default_ticks = ticks;
|
|
-
|
|
dev_info(&pdev->dev, "watchdog init success\n");
|
|
|
|
return 0;
|
|
@@ -274,10 +278,11 @@ static int __devinit rdc321x_wdt_probe(s
|
|
|
|
static int __devexit rdc321x_wdt_remove(struct platform_device *pdev)
|
|
{
|
|
- if (rdc321x_wdt_device.queue) {
|
|
- rdc321x_wdt_device.queue = 0;
|
|
- wait_for_completion(&rdc321x_wdt_device.stop);
|
|
- }
|
|
+ if (rdc321x_wdt_device.inuse)
|
|
+ rdc321x_wdt_device.inuse = 0;
|
|
+
|
|
+ while (timer_pending(&rdc321x_wdt_device.timer))
|
|
+ msleep(100);
|
|
|
|
misc_deregister(&rdc321x_wdt_misc);
|
|
|