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path: root/drivers/watchdog/it87_wdt.c
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Diffstat (limited to 'drivers/watchdog/it87_wdt.c')
-rw-r--r--drivers/watchdog/it87_wdt.c226
1 files changed, 19 insertions, 207 deletions
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c
index 9a6523e70ffc..29aea28628c8 100644
--- a/drivers/watchdog/it87_wdt.c
+++ b/drivers/watchdog/it87_wdt.c
@@ -33,7 +33,6 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/ioport.h>
#include <linux/watchdog.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
@@ -42,8 +41,6 @@
#define WATCHDOG_NAME "IT87 WDT"
/* Defaults for Module Parameter */
-#define DEFAULT_NOGAMEPORT 0
-#define DEFAULT_NOCIR 0
#define DEFAULT_TIMEOUT 60
#define DEFAULT_TESTMODE 0
#define DEFAULT_NOWAYOUT WATCHDOG_NOWAYOUT
@@ -54,15 +51,11 @@
/* Logical device Numbers LDN */
#define GPIO 0x07
-#define GAMEPORT 0x09
-#define CIR 0x0a
/* Configuration Registers and Functions */
#define LDNREG 0x07
#define CHIPID 0x20
#define CHIPREV 0x22
-#define ACTREG 0x30
-#define BASEREG 0x60
/* Chip Id numbers */
#define NO_DEV_ID 0xffff
@@ -84,14 +77,6 @@
#define WDTVALLSB 0x73
#define WDTVALMSB 0x74
-/* GPIO Bits WDTCTRL */
-#define WDT_CIRINT 0x80
-#define WDT_MOUSEINT 0x40
-#define WDT_KYBINT 0x20
-#define WDT_GAMEPORT 0x10 /* not in it8718, it8720, it8721, it8728 */
-#define WDT_FORCE 0x02
-#define WDT_ZERO 0x01
-
/* GPIO Bits WDTCFG */
#define WDT_TOV1 0x80
#define WDT_KRST 0x40
@@ -99,46 +84,12 @@
#define WDT_PWROK 0x10 /* not in it8721 */
#define WDT_INT_MASK 0x0f
-/* CIR Configuration Register LDN=0x0a */
-#define CIR_ILS 0x70
-
-/* The default Base address is not always available, we use this */
-#define CIR_BASE 0x0208
-
-/* CIR Controller */
-#define CIR_DR(b) (b)
-#define CIR_IER(b) (b + 1)
-#define CIR_RCR(b) (b + 2)
-#define CIR_TCR1(b) (b + 3)
-#define CIR_TCR2(b) (b + 4)
-#define CIR_TSR(b) (b + 5)
-#define CIR_RSR(b) (b + 6)
-#define CIR_BDLR(b) (b + 5)
-#define CIR_BDHR(b) (b + 6)
-#define CIR_IIR(b) (b + 7)
-
-/* Default Base address of Game port */
-#define GP_BASE_DEFAULT 0x0201
+static unsigned int max_units, chip_type;
-/* wdt_status */
-#define WDTS_USE_GP 0
-#define WDTS_USE_CIR 1
-
-static unsigned int base, gpact, ciract, max_units, chip_type;
-static unsigned long wdt_status;
-
-static int nogameport = DEFAULT_NOGAMEPORT;
-static int nocir = DEFAULT_NOCIR;
static unsigned int timeout = DEFAULT_TIMEOUT;
-static int testmode = DEFAULT_TESTMODE;
-static bool nowayout = DEFAULT_NOWAYOUT;
-
-module_param(nogameport, int, 0);
-MODULE_PARM_DESC(nogameport, "Forbid the activation of game port, default="
- __MODULE_STRING(DEFAULT_NOGAMEPORT));
-module_param(nocir, int, 0);
-MODULE_PARM_DESC(nocir, "Forbid the use of Consumer IR interrupts to reset timer, default="
- __MODULE_STRING(DEFAULT_NOCIR));
+static int testmode = DEFAULT_TESTMODE;
+static bool nowayout = DEFAULT_NOWAYOUT;
+
module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds, default="
__MODULE_STRING(DEFAULT_TIMEOUT));
@@ -210,29 +161,28 @@ static inline void superio_outw(int val, int reg)
}
/* Internal function, should be called after superio_select(GPIO) */
-static void _wdt_update_timeout(void)
+static void _wdt_update_timeout(unsigned int t)
{
unsigned char cfg = WDT_KRST;
- int tm = timeout;
if (testmode)
cfg = 0;
- if (tm <= max_units)
+ if (t <= max_units)
cfg |= WDT_TOV1;
else
- tm /= 60;
+ t /= 60;
if (chip_type != IT8721_ID)
cfg |= WDT_PWROK;
superio_outb(cfg, WDTCFG);
- superio_outb(tm, WDTVALLSB);
+ superio_outb(t, WDTVALLSB);
if (max_units > 255)
- superio_outb(tm>>8, WDTVALMSB);
+ superio_outb(t >> 8, WDTVALMSB);
}
-static int wdt_update_timeout(void)
+static int wdt_update_timeout(unsigned int t)
{
int ret;
@@ -241,7 +191,7 @@ static int wdt_update_timeout(void)
return ret;
superio_select(GPIO);
- _wdt_update_timeout();
+ _wdt_update_timeout(t);
superio_exit();
return 0;
@@ -256,55 +206,14 @@ static int wdt_round_time(int t)
/* watchdog timer handling */
-static int wdt_keepalive(struct watchdog_device *wdd)
-{
- int ret = 0;
-
- if (test_bit(WDTS_USE_GP, &wdt_status))
- inb(base);
- else if (test_bit(WDTS_USE_CIR, &wdt_status))
- /* The timer reloads with around 5 msec delay */
- outb(0x55, CIR_DR(base));
- else
- ret = wdt_update_timeout();
-
- return ret;
-}
-
static int wdt_start(struct watchdog_device *wdd)
{
- int ret = superio_enter();
- if (ret)
- return ret;
-
- superio_select(GPIO);
- if (test_bit(WDTS_USE_GP, &wdt_status))
- superio_outb(WDT_GAMEPORT, WDTCTRL);
- else if (test_bit(WDTS_USE_CIR, &wdt_status))
- superio_outb(WDT_CIRINT, WDTCTRL);
-
- _wdt_update_timeout();
-
- superio_exit();
-
- return 0;
+ return wdt_update_timeout(wdd->timeout);
}
static int wdt_stop(struct watchdog_device *wdd)
{
- int ret = superio_enter();
- if (ret)
- return ret;
-
- superio_select(GPIO);
- superio_outb(0x00, WDTCTRL);
- superio_outb(WDT_TOV1, WDTCFG);
- superio_outb(0x00, WDTVALLSB);
- if (max_units > 255)
- superio_outb(0x00, WDTVALMSB);
-
- superio_exit();
- return 0;
+ return wdt_update_timeout(0);
}
/**
@@ -327,7 +236,7 @@ static int wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
wdd->timeout = t;
if (watchdog_hw_running(wdd))
- ret = wdt_update_timeout();
+ ret = wdt_update_timeout(t);
return ret;
}
@@ -342,7 +251,6 @@ static struct watchdog_ops wdt_ops = {
.owner = THIS_MODULE,
.start = wdt_start,
.stop = wdt_stop,
- .ping = wdt_keepalive,
.set_timeout = wdt_set_timeout,
};
@@ -366,12 +274,8 @@ static struct notifier_block wdt_notifier = {
static int __init it87_wdt_init(void)
{
- int rc = 0;
- int try_gameport = !nogameport;
u8 chip_rev;
- int gp_rreq_fail = 0;
-
- wdt_status = 0;
+ int rc;
rc = superio_enter();
if (rc)
@@ -399,7 +303,6 @@ static int __init it87_wdt_init(void)
case IT8728_ID:
case IT8783_ID:
max_units = 65535;
- try_gameport = 0;
break;
case IT8705_ID:
pr_err("Unsupported Chip found, Chip %04x Revision %02x\n",
@@ -421,48 +324,7 @@ static int __init it87_wdt_init(void)
superio_select(GPIO);
superio_outb(WDT_TOV1, WDTCFG);
superio_outb(0x00, WDTCTRL);
-
- /* First try to get Gameport support */
- if (try_gameport) {
- superio_select(GAMEPORT);
- base = superio_inw(BASEREG);
- if (!base) {
- base = GP_BASE_DEFAULT;
- superio_outw(base, BASEREG);
- }
- gpact = superio_inb(ACTREG);
- superio_outb(0x01, ACTREG);
- if (request_region(base, 1, WATCHDOG_NAME))
- set_bit(WDTS_USE_GP, &wdt_status);
- else
- gp_rreq_fail = 1;
- }
-
- /* If we haven't Gameport support, try to get CIR support */
- if (!nocir && !test_bit(WDTS_USE_GP, &wdt_status)) {
- if (!request_region(CIR_BASE, 8, WATCHDOG_NAME)) {
- if (gp_rreq_fail)
- pr_err("I/O Address 0x%04x and 0x%04x already in use\n",
- base, CIR_BASE);
- else
- pr_err("I/O Address 0x%04x already in use\n",
- CIR_BASE);
- rc = -EIO;
- goto err_out;
- }
- base = CIR_BASE;
-
- superio_select(CIR);
- superio_outw(base, BASEREG);
- superio_outb(0x00, CIR_ILS);
- ciract = superio_inb(ACTREG);
- superio_outb(0x01, ACTREG);
- if (gp_rreq_fail) {
- superio_select(GAMEPORT);
- superio_outb(gpact, ACTREG);
- }
- set_bit(WDTS_USE_CIR, &wdt_status);
- }
+ superio_exit();
if (timeout < 1 || timeout > max_units * 60) {
timeout = DEFAULT_TIMEOUT;
@@ -479,18 +341,7 @@ static int __init it87_wdt_init(void)
rc = register_reboot_notifier(&wdt_notifier);
if (rc) {
pr_err("Cannot register reboot notifier (err=%d)\n", rc);
- goto err_out_region;
- }
-
- /* Initialize CIR to use it as keepalive source */
- if (test_bit(WDTS_USE_CIR, &wdt_status)) {
- outb(0x00, CIR_RCR(base));
- outb(0xc0, CIR_TCR1(base));
- outb(0x5c, CIR_TCR2(base));
- outb(0x10, CIR_IER(base));
- outb(0x00, CIR_BDHR(base));
- outb(0x01, CIR_BDLR(base));
- outb(0x09, CIR_IER(base));
+ return rc;
}
rc = watchdog_register_device(&wdt_dev);
@@ -499,59 +350,20 @@ static int __init it87_wdt_init(void)
goto err_out_reboot;
}
- pr_info("Chip IT%04x revision %d initialized. timeout=%d sec (nowayout=%d testmode=%d nogameport=%d nocir=%d)\n",
- chip_type, chip_rev, timeout,
- nowayout, testmode, nogameport, nocir);
+ pr_info("Chip IT%04x revision %d initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
+ chip_type, chip_rev, timeout, nowayout, testmode);
- superio_exit();
return 0;
err_out_reboot:
unregister_reboot_notifier(&wdt_notifier);
-err_out_region:
- if (test_bit(WDTS_USE_GP, &wdt_status))
- release_region(base, 1);
- else if (test_bit(WDTS_USE_CIR, &wdt_status)) {
- release_region(base, 8);
- superio_select(CIR);
- superio_outb(ciract, ACTREG);
- }
-err_out:
- if (try_gameport) {
- superio_select(GAMEPORT);
- superio_outb(gpact, ACTREG);
- }
-
- superio_exit();
return rc;
}
static void __exit it87_wdt_exit(void)
{
- if (superio_enter() == 0) {
- superio_select(GPIO);
- superio_outb(0x00, WDTCTRL);
- superio_outb(0x00, WDTCFG);
- superio_outb(0x00, WDTVALLSB);
- if (max_units > 255)
- superio_outb(0x00, WDTVALMSB);
- if (test_bit(WDTS_USE_GP, &wdt_status)) {
- superio_select(GAMEPORT);
- superio_outb(gpact, ACTREG);
- } else if (test_bit(WDTS_USE_CIR, &wdt_status)) {
- superio_select(CIR);
- superio_outb(ciract, ACTREG);
- }
- superio_exit();
- }
-
watchdog_unregister_device(&wdt_dev);
unregister_reboot_notifier(&wdt_notifier);
-
- if (test_bit(WDTS_USE_GP, &wdt_status))
- release_region(base, 1);
- else if (test_bit(WDTS_USE_CIR, &wdt_status))
- release_region(base, 8);
}
module_init(it87_wdt_init);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-31 20:13:51 +0000