|
|
|
@ -73,10 +73,27 @@ static unsigned expect_close;
|
|
|
|
|
/* XXX currently fixed, allows max margin ~68.72 secs */
|
|
|
|
|
#define prescale_value 0xFFFF
|
|
|
|
|
|
|
|
|
|
// Offset of the WDT registers
|
|
|
|
|
static unsigned long ar7_regs_wdt;
|
|
|
|
|
// Pointer to the remapped WDT IO space
|
|
|
|
|
static ar7_wdt_t *ar7_wdt;
|
|
|
|
|
static void ar7_wdt_get_regs(void)
|
|
|
|
|
{
|
|
|
|
|
u16 chip_id = ar7_chip_id();
|
|
|
|
|
switch (chip_id)
|
|
|
|
|
{
|
|
|
|
|
case AR7_CHIP_7100:
|
|
|
|
|
case AR7_CHIP_7200:
|
|
|
|
|
ar7_regs_wdt = AR7_REGS_WDT;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
ar7_regs_wdt = UR8_REGS_WDT;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void ar7_wdt_kick(u32 value)
|
|
|
|
|
{
|
|
|
|
|
volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
|
|
|
|
|
|
|
|
|
ar7_wdt->kick_lock = 0x5555;
|
|
|
|
|
if ((ar7_wdt->kick_lock & 3) == 1) {
|
|
|
|
|
ar7_wdt->kick_lock = 0xAAAA;
|
|
|
|
@ -90,8 +107,6 @@ static void ar7_wdt_kick(u32 value)
|
|
|
|
|
|
|
|
|
|
static void ar7_wdt_prescale(u32 value)
|
|
|
|
|
{
|
|
|
|
|
volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
|
|
|
|
|
|
|
|
|
ar7_wdt->prescale_lock = 0x5A5A;
|
|
|
|
|
if ((ar7_wdt->prescale_lock & 3) == 1) {
|
|
|
|
|
ar7_wdt->prescale_lock = 0xA5A5;
|
|
|
|
@ -105,8 +120,6 @@ static void ar7_wdt_prescale(u32 value)
|
|
|
|
|
|
|
|
|
|
static void ar7_wdt_change(u32 value)
|
|
|
|
|
{
|
|
|
|
|
volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
|
|
|
|
|
|
|
|
|
ar7_wdt->change_lock = 0x6666;
|
|
|
|
|
if ((ar7_wdt->change_lock & 3) == 1) {
|
|
|
|
|
ar7_wdt->change_lock = 0xBBBB;
|
|
|
|
@ -120,8 +133,6 @@ static void ar7_wdt_change(u32 value)
|
|
|
|
|
|
|
|
|
|
static void ar7_wdt_disable(u32 value)
|
|
|
|
|
{
|
|
|
|
|
volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
|
|
|
|
|
|
|
|
|
ar7_wdt->disable_lock = 0x7777;
|
|
|
|
|
if ((ar7_wdt->disable_lock & 3) == 1) {
|
|
|
|
|
ar7_wdt->disable_lock = 0xCCCC;
|
|
|
|
@ -285,12 +296,16 @@ static struct miscdevice ar7_wdt_miscdev = {
|
|
|
|
|
static int __init ar7_wdt_init(void)
|
|
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
ar7_wdt_get_regs();
|
|
|
|
|
|
|
|
|
|
if (!request_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t), LONGNAME)) {
|
|
|
|
|
if (!request_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t), LONGNAME)) {
|
|
|
|
|
printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");
|
|
|
|
|
return -EBUSY;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ar7_wdt = (ar7_wdt_t *)ioremap(ar7_regs_wdt, sizeof(ar7_wdt_t));
|
|
|
|
|
|
|
|
|
|
ar7_wdt_disable_wdt();
|
|
|
|
|
ar7_wdt_prescale(prescale_value);
|
|
|
|
|
ar7_wdt_update_margin(margin);
|
|
|
|
@ -313,7 +328,7 @@ static int __init ar7_wdt_init(void)
|
|
|
|
|
out_register:
|
|
|
|
|
misc_deregister(&ar7_wdt_miscdev);
|
|
|
|
|
out_alloc:
|
|
|
|
|
release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
|
|
|
|
release_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t));
|
|
|
|
|
out:
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
@ -322,7 +337,8 @@ static void __exit ar7_wdt_cleanup(void)
|
|
|
|
|
{
|
|
|
|
|
unregister_reboot_notifier(&ar7_wdt_notifier);
|
|
|
|
|
misc_deregister(&ar7_wdt_miscdev);
|
|
|
|
|
release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
|
|
|
|
iounmap(ar7_wdt);
|
|
|
|
|
release_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
module_init(ar7_wdt_init);
|
|
|
|
|