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Diffstat (limited to 'drivers/watchdog/i6300esb.c')
-rw-r--r--drivers/watchdog/i6300esb.c101
1 files changed, 64 insertions, 37 deletions
diff --git a/drivers/watchdog/i6300esb.c b/drivers/watchdog/i6300esb.c
index 74f951c18b90..2dbe83570d65 100644
--- a/drivers/watchdog/i6300esb.c
+++ b/drivers/watchdog/i6300esb.c
@@ -13,7 +13,7 @@
*
* The timer is implemented in the following I/O controller hubs:
* (See the intel documentation on http://developer.intel.com.)
- * 6300ESB chip : document number 300641-003
+ * 6300ESB chip : document number 300641-004
*
* 2004YYZZ Ross Biro
* Initial version 0.01
@@ -34,7 +34,7 @@
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
-#include <linux/reboot.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/ioport.h>
@@ -42,7 +42,7 @@
#include <linux/io.h>
/* Module and version information */
-#define ESB_VERSION "0.03"
+#define ESB_VERSION "0.04"
#define ESB_MODULE_NAME "i6300ESB timer"
#define ESB_DRIVER_NAME ESB_MODULE_NAME ", v" ESB_VERSION
#define PFX ESB_MODULE_NAME ": "
@@ -81,6 +81,7 @@ static unsigned long timer_alive;
static struct pci_dev *esb_pci;
static unsigned short triggered; /* The status of the watchdog upon boot */
static char esb_expect_close;
+static struct platform_device *esb_platform_device;
/* module parameters */
/* 30 sec default heartbeat (1 < heartbeat < 2*1023) */
@@ -114,13 +115,18 @@ static inline void esb_unlock_registers(void)
writeb(ESB_UNLOCK2, ESB_RELOAD_REG);
}
-static void esb_timer_start(void)
+static int esb_timer_start(void)
{
u8 val;
+ spin_lock(&esb_lock);
+ esb_unlock_registers();
+ writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
/* Enable or Enable + Lock? */
val = 0x02 | (nowayout ? 0x01 : 0x00);
pci_write_config_byte(esb_pci, ESB_LOCK_REG, val);
+ spin_unlock(&esb_lock);
+ return 0;
}
static int esb_timer_stop(void)
@@ -207,7 +213,6 @@ static int esb_open(struct inode *inode, struct file *file)
return -EBUSY;
/* Reload and activate timer */
- esb_timer_keepalive();
esb_timer_start();
return nonseekable_open(inode, file);
@@ -240,7 +245,8 @@ static ssize_t esb_write(struct file *file, const char __user *data,
* five months ago... */
esb_expect_close = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the
+ * magic character */
for (i = 0; i != len; i++) {
char c;
if (get_user(c, data + i))
@@ -292,7 +298,6 @@ static long esb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
if (new_options & WDIOS_ENABLECARD) {
- esb_timer_keepalive();
esb_timer_start();
retval = 0;
}
@@ -319,19 +324,6 @@ static long esb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
/*
- * Notify system
- */
-
-static int esb_notify_sys(struct notifier_block *this,
- unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- esb_timer_stop(); /* Turn the WDT off */
-
- return NOTIFY_DONE;
-}
-
-/*
* Kernel Interfaces
*/
@@ -350,10 +342,6 @@ static struct miscdevice esb_miscdev = {
.fops = &esb_fops,
};
-static struct notifier_block esb_notifier = {
- .notifier_call = esb_notify_sys,
-};
-
/*
* Data for PCI driver interface
*
@@ -372,7 +360,7 @@ MODULE_DEVICE_TABLE(pci, esb_pci_tbl);
* Init & exit routines
*/
-static unsigned char __init esb_getdevice(void)
+static unsigned char __devinit esb_getdevice(void)
{
u8 val1;
unsigned short val2;
@@ -443,7 +431,7 @@ err_devput:
return 0;
}
-static int __init watchdog_init(void)
+static int __devinit esb_probe(struct platform_device *dev)
{
int ret;
@@ -459,19 +447,13 @@ static int __init watchdog_init(void)
"heartbeat value must be 1<heartbeat<2046, using %d\n",
heartbeat);
}
- ret = register_reboot_notifier(&esb_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX
- "cannot register reboot notifier (err=%d)\n", ret);
- goto err_unmap;
- }
ret = misc_register(&esb_miscdev);
if (ret != 0) {
printk(KERN_ERR PFX
"cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
- goto err_notifier;
+ goto err_unmap;
}
esb_timer_stop();
printk(KERN_INFO PFX
@@ -479,8 +461,6 @@ static int __init watchdog_init(void)
BASEADDR, heartbeat, nowayout);
return 0;
-err_notifier:
- unregister_reboot_notifier(&esb_notifier);
err_unmap:
iounmap(BASEADDR);
/* err_release: */
@@ -492,7 +472,7 @@ err_unmap:
return ret;
}
-static void __exit watchdog_cleanup(void)
+static int __devexit esb_remove(struct platform_device *dev)
{
/* Stop the timer before we leave */
if (!nowayout)
@@ -500,11 +480,58 @@ static void __exit watchdog_cleanup(void)
/* Deregister */
misc_deregister(&esb_miscdev);
- unregister_reboot_notifier(&esb_notifier);
iounmap(BASEADDR);
pci_release_region(esb_pci, 0);
pci_disable_device(esb_pci);
pci_dev_put(esb_pci);
+ return 0;
+}
+
+static void esb_shutdown(struct platform_device *dev)
+{
+ esb_timer_stop();
+}
+
+static struct platform_driver esb_platform_driver = {
+ .probe = esb_probe,
+ .remove = __devexit_p(esb_remove),
+ .shutdown = esb_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = ESB_MODULE_NAME,
+ },
+};
+
+static int __init watchdog_init(void)
+{
+ int err;
+
+ printk(KERN_INFO PFX "Intel 6300ESB WatchDog Timer Driver v%s\n",
+ ESB_VERSION);
+
+ err = platform_driver_register(&esb_platform_driver);
+ if (err)
+ return err;
+
+ esb_platform_device = platform_device_register_simple(ESB_MODULE_NAME,
+ -1, NULL, 0);
+ if (IS_ERR(esb_platform_device)) {
+ err = PTR_ERR(esb_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&esb_platform_driver);
+ return err;
+}
+
+static void __exit watchdog_cleanup(void)
+{
+ platform_device_unregister(esb_platform_device);
+ platform_driver_unregister(&esb_platform_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
}
module_init(watchdog_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 12:22:08 +0100