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Code Activity

Register the second uart on tnetd7300 and fix the watchdog register for 7200/7300, thanks to DerAgo (#2149)

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8280 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
florian
2007-07-31 15:52:06 +00:00
parent 174f70763e
commit 247c33e26d
3 changed files with 90 additions and 56 deletions
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38
target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
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@@ -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);