mirror of https://gitee.com/openkylin/linux.git
[WATCHDOG] pcwd.c: Port to the new device driver model
Port the pcwd.c driver to the new device driver model. Since this is an ISA card, I used Rene Herman's new isa bus type. This made the probing for the card very "easy". Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck
parent
9f7afa6b34
commit
5aa15050a2
|
|
@ -59,10 +59,10 @@
|
|||
#include <linux/jiffies.h> /* For jiffies stuff */
|
||||
#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
|
||||
#include <linux/watchdog.h> /* For the watchdog specific items */
|
||||
#include <linux/notifier.h> /* For notifier support */
|
||||
#include <linux/reboot.h> /* For reboot_notifier stuff */
|
||||
#include <linux/reboot.h> /* For kernel_power_off() */
|
||||
#include <linux/init.h> /* For __init/__exit/... */
|
||||
#include <linux/fs.h> /* For file operations */
|
||||
#include <linux/isa.h> /* For isa devices */
|
||||
#include <linux/ioport.h> /* For io-port access */
|
||||
#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
|
||||
|
||||
|
|
@ -70,8 +70,8 @@
|
|||
#include <asm/io.h> /* For inb/outb/... */
|
||||
|
||||
/* Module and version information */
|
||||
#define WATCHDOG_VERSION "1.18"
|
||||
#define WATCHDOG_DATE "21 Jan 2007"
|
||||
#define WATCHDOG_VERSION "1.20"
|
||||
#define WATCHDOG_DATE "18 Feb 2007"
|
||||
#define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
|
||||
#define WATCHDOG_NAME "pcwd"
|
||||
#define PFX WATCHDOG_NAME ": "
|
||||
|
|
@ -88,6 +88,15 @@
|
|||
#define PCWD_REVISION_A 1
|
||||
#define PCWD_REVISION_C 2
|
||||
|
||||
/*
|
||||
* These are the auto-probe addresses available.
|
||||
*
|
||||
* Revision A only uses ports 0x270 and 0x370. Revision C introduced 0x350.
|
||||
* Revision A has an address range of 2 addresses, while Revision C has 4.
|
||||
*/
|
||||
#define PCWD_ISA_NR_CARDS 3
|
||||
static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 };
|
||||
|
||||
/*
|
||||
* These are the defines that describe the control status bits for the
|
||||
* PCI-PC Watchdog card.
|
||||
|
|
@ -485,7 +494,7 @@ static int pcwd_get_status(int *status)
|
|||
if (control_status & WD_T110) {
|
||||
*status |= WDIOF_OVERHEAT;
|
||||
if (temp_panic) {
|
||||
printk (KERN_INFO PFX "Temperature overheat trip!\n");
|
||||
printk(KERN_INFO PFX "Temperature overheat trip!\n");
|
||||
kernel_power_off();
|
||||
/* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
|
||||
}
|
||||
|
|
@ -497,7 +506,7 @@ static int pcwd_get_status(int *status)
|
|||
if (control_status & WD_REVC_TTRP) {
|
||||
*status |= WDIOF_OVERHEAT;
|
||||
if (temp_panic) {
|
||||
printk (KERN_INFO PFX "Temperature overheat trip!\n");
|
||||
printk(KERN_INFO PFX "Temperature overheat trip!\n");
|
||||
kernel_power_off();
|
||||
/* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
|
||||
}
|
||||
|
|
@ -733,20 +742,6 @@ static int pcwd_temp_close(struct inode *inode, struct file *file)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Notify system
|
||||
*/
|
||||
|
||||
static int pcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
|
||||
{
|
||||
if (code==SYS_DOWN || code==SYS_HALT) {
|
||||
/* Turn the WDT off */
|
||||
pcwd_stop();
|
||||
}
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
/*
|
||||
* Kernel Interfaces
|
||||
*/
|
||||
|
|
@ -780,10 +775,6 @@ static struct miscdevice temp_miscdev = {
|
|||
.fops = &pcwd_temp_fops,
|
||||
};
|
||||
|
||||
static struct notifier_block pcwd_notifier = {
|
||||
.notifier_call = pcwd_notify_sys,
|
||||
};
|
||||
|
||||
/*
|
||||
* Init & exit routines
|
||||
*/
|
||||
|
|
@ -803,10 +794,67 @@ static inline int get_revision(void)
|
|||
return r;
|
||||
}
|
||||
|
||||
static int __devinit pcwatchdog_init(int base_addr)
|
||||
/*
|
||||
* The ISA cards have a heartbeat bit in one of the registers, which
|
||||
* register is card dependent. The heartbeat bit is monitored, and if
|
||||
* found, is considered proof that a Berkshire card has been found.
|
||||
* The initial rate is once per second at board start up, then twice
|
||||
* per second for normal operation.
|
||||
*/
|
||||
static int __devinit pcwd_isa_match(struct device *dev, unsigned int id)
|
||||
{
|
||||
int base_addr=pcwd_ioports[id];
|
||||
int port0, last_port0; /* Reg 0, in case it's REV A */
|
||||
int port1, last_port1; /* Register 1 for REV C cards */
|
||||
int i;
|
||||
int retval;
|
||||
|
||||
if (debug >= DEBUG)
|
||||
printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n",
|
||||
id);
|
||||
|
||||
if (!request_region (base_addr, 4, "PCWD")) {
|
||||
printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
retval = 0;
|
||||
|
||||
port0 = inb_p(base_addr); /* For REV A boards */
|
||||
port1 = inb_p(base_addr + 1); /* For REV C boards */
|
||||
if (port0 != 0xff || port1 != 0xff) {
|
||||
/* Not an 'ff' from a floating bus, so must be a card! */
|
||||
for (i = 0; i < 4; ++i) {
|
||||
|
||||
msleep(500);
|
||||
|
||||
last_port0 = port0;
|
||||
last_port1 = port1;
|
||||
|
||||
port0 = inb_p(base_addr);
|
||||
port1 = inb_p(base_addr + 1);
|
||||
|
||||
/* Has either hearbeat bit changed? */
|
||||
if ((port0 ^ last_port0) & WD_HRTBT ||
|
||||
(port1 ^ last_port1) & WD_REVC_HRBT) {
|
||||
retval = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
release_region (base_addr, 4);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (debug >= DEBUG)
|
||||
printk(KERN_DEBUG PFX "pcwd_isa_probe id=%d\n",
|
||||
id);
|
||||
|
||||
cards_found++;
|
||||
if (cards_found == 1)
|
||||
printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", WD_VER);
|
||||
|
|
@ -816,11 +864,13 @@ static int __devinit pcwatchdog_init(int base_addr)
|
|||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (base_addr == 0x0000) {
|
||||
if (pcwd_ioports[id] == 0x0000) {
|
||||
printk(KERN_ERR PFX "No I/O-Address for card detected\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
pcwd_private.io_addr = base_addr;
|
||||
pcwd_private.io_addr = pcwd_ioports[id];
|
||||
|
||||
spin_lock_init(&pcwd_private.io_lock);
|
||||
|
||||
/* Check card's revision */
|
||||
pcwd_private.revision = get_revision();
|
||||
|
|
@ -828,8 +878,8 @@ static int __devinit pcwatchdog_init(int base_addr)
|
|||
if (!request_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) {
|
||||
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
|
||||
pcwd_private.io_addr);
|
||||
pcwd_private.io_addr = 0x0000;
|
||||
return -EIO;
|
||||
ret=-EIO;
|
||||
goto error_request_region;
|
||||
}
|
||||
|
||||
/* Initial variables */
|
||||
|
|
@ -865,24 +915,12 @@ static int __devinit pcwatchdog_init(int base_addr)
|
|||
WATCHDOG_HEARTBEAT);
|
||||
}
|
||||
|
||||
ret = register_reboot_notifier(&pcwd_notifier);
|
||||
if (ret) {
|
||||
printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
|
||||
ret);
|
||||
release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
|
||||
pcwd_private.io_addr = 0x0000;
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (pcwd_private.supports_temp) {
|
||||
ret = misc_register(&temp_miscdev);
|
||||
if (ret) {
|
||||
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
|
||||
TEMP_MINOR, ret);
|
||||
unregister_reboot_notifier(&pcwd_notifier);
|
||||
release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
|
||||
pcwd_private.io_addr = 0x0000;
|
||||
return ret;
|
||||
goto error_misc_register_temp;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -890,22 +928,34 @@ static int __devinit pcwatchdog_init(int base_addr)
|
|||
if (ret) {
|
||||
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
|
||||
WATCHDOG_MINOR, ret);
|
||||
if (pcwd_private.supports_temp)
|
||||
misc_deregister(&temp_miscdev);
|
||||
unregister_reboot_notifier(&pcwd_notifier);
|
||||
release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
|
||||
pcwd_private.io_addr = 0x0000;
|
||||
return ret;
|
||||
goto error_misc_register_watchdog;
|
||||
}
|
||||
|
||||
printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
|
||||
heartbeat, nowayout);
|
||||
|
||||
return 0;
|
||||
|
||||
error_misc_register_watchdog:
|
||||
if (pcwd_private.supports_temp)
|
||||
misc_deregister(&temp_miscdev);
|
||||
error_misc_register_temp:
|
||||
release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
|
||||
error_request_region:
|
||||
pcwd_private.io_addr = 0x0000;
|
||||
cards_found--;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __devexit pcwatchdog_exit(void)
|
||||
static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id)
|
||||
{
|
||||
if (debug >= DEBUG)
|
||||
printk(KERN_DEBUG PFX "pcwd_isa_remove id=%d\n",
|
||||
id);
|
||||
|
||||
if (!pcwd_private.io_addr)
|
||||
return 1;
|
||||
|
||||
/* Disable the board */
|
||||
if (!nowayout)
|
||||
pcwd_stop();
|
||||
|
|
@ -914,102 +964,50 @@ static void __devexit pcwatchdog_exit(void)
|
|||
misc_deregister(&pcwd_miscdev);
|
||||
if (pcwd_private.supports_temp)
|
||||
misc_deregister(&temp_miscdev);
|
||||
unregister_reboot_notifier(&pcwd_notifier);
|
||||
release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
|
||||
pcwd_private.io_addr = 0x0000;
|
||||
cards_found--;
|
||||
}
|
||||
|
||||
/*
|
||||
* The ISA cards have a heartbeat bit in one of the registers, which
|
||||
* register is card dependent. The heartbeat bit is monitored, and if
|
||||
* found, is considered proof that a Berkshire card has been found.
|
||||
* The initial rate is once per second at board start up, then twice
|
||||
* per second for normal operation.
|
||||
*/
|
||||
static int __init pcwd_checkcard(int base_addr)
|
||||
{
|
||||
int port0, last_port0; /* Reg 0, in case it's REV A */
|
||||
int port1, last_port1; /* Register 1 for REV C cards */
|
||||
int i;
|
||||
int retval;
|
||||
|
||||
if (!request_region (base_addr, 4, "PCWD")) {
|
||||
printk (KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
retval = 0;
|
||||
|
||||
port0 = inb_p(base_addr); /* For REV A boards */
|
||||
port1 = inb_p(base_addr + 1); /* For REV C boards */
|
||||
if (port0 != 0xff || port1 != 0xff) {
|
||||
/* Not an 'ff' from a floating bus, so must be a card! */
|
||||
for (i = 0; i < 4; ++i) {
|
||||
|
||||
msleep(500);
|
||||
|
||||
last_port0 = port0;
|
||||
last_port1 = port1;
|
||||
|
||||
port0 = inb_p(base_addr);
|
||||
port1 = inb_p(base_addr + 1);
|
||||
|
||||
/* Has either hearbeat bit changed? */
|
||||
if ((port0 ^ last_port0) & WD_HRTBT ||
|
||||
(port1 ^ last_port1) & WD_REVC_HRBT) {
|
||||
retval = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
release_region (base_addr, 4);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
/*
|
||||
* These are the auto-probe addresses available.
|
||||
*
|
||||
* Revision A only uses ports 0x270 and 0x370. Revision C introduced 0x350.
|
||||
* Revision A has an address range of 2 addresses, while Revision C has 4.
|
||||
*/
|
||||
static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 };
|
||||
|
||||
static int __init pcwd_init_module(void)
|
||||
{
|
||||
int i, found = 0;
|
||||
|
||||
spin_lock_init(&pcwd_private.io_lock);
|
||||
|
||||
for (i = 0; pcwd_ioports[i] != 0; i++) {
|
||||
if (pcwd_checkcard(pcwd_ioports[i])) {
|
||||
if (!(pcwatchdog_init(pcwd_ioports[i])))
|
||||
found++;
|
||||
}
|
||||
}
|
||||
|
||||
if (!found) {
|
||||
printk (KERN_INFO PFX "No card detected, or port not available\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pcwd_isa_shutdown(struct device *dev, unsigned int id)
|
||||
{
|
||||
if (debug >= DEBUG)
|
||||
printk(KERN_DEBUG PFX "pcwd_isa_shutdown id=%d\n",
|
||||
id);
|
||||
|
||||
pcwd_stop();
|
||||
}
|
||||
|
||||
static struct isa_driver pcwd_isa_driver = {
|
||||
.match = pcwd_isa_match,
|
||||
.probe = pcwd_isa_probe,
|
||||
.remove = __devexit_p(pcwd_isa_remove),
|
||||
.shutdown = pcwd_isa_shutdown,
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = WATCHDOG_NAME,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init pcwd_init_module(void)
|
||||
{
|
||||
return isa_register_driver(&pcwd_isa_driver, PCWD_ISA_NR_CARDS);
|
||||
}
|
||||
|
||||
static void __exit pcwd_cleanup_module(void)
|
||||
{
|
||||
if (pcwd_private.io_addr)
|
||||
pcwatchdog_exit();
|
||||
|
||||
isa_unregister_driver(&pcwd_isa_driver);
|
||||
printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
|
||||
}
|
||||
|
||||
module_init(pcwd_init_module);
|
||||
module_exit(pcwd_cleanup_module);
|
||||
|
||||
MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>");
|
||||
MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>, Wim Van Sebroeck <wim@iguana.be>");
|
||||
MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver");
|
||||
MODULE_VERSION(WATCHDOG_VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
MODULE_ALIAS_MISCDEV(TEMP_MINOR);
|
||||
|
|
|
|||
Loading…
Reference in New Issue