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path: root/drivers/acpi/sleep
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Diffstat (limited to 'drivers/acpi/sleep')
-rw-r--r--drivers/acpi/sleep/main.c144
-rw-r--r--drivers/acpi/sleep/proc.c46
-rw-r--r--drivers/acpi/sleep/sleep.h2
3 files changed, 135 insertions, 57 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 2c0b6630f8ba..7f97e32fc33f 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -26,9 +26,24 @@ u8 sleep_states[ACPI_S_STATE_COUNT];
#ifdef CONFIG_PM_SLEEP
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+static bool acpi_sleep_finish_wake_up;
+
+/*
+ * ACPI 2.0 and later want us to execute _PTS after suspending devices, so we
+ * allow the user to request that behavior by using the 'acpi_new_pts_ordering'
+ * kernel command line option that causes the following variable to be set.
+ */
+static bool new_pts_ordering;
+
+static int __init acpi_new_pts_ordering(char *str)
+{
+ new_pts_ordering = true;
+ return 1;
+}
+__setup("acpi_new_pts_ordering", acpi_new_pts_ordering);
#endif
-int acpi_sleep_prepare(u32 acpi_state)
+static int acpi_sleep_prepare(u32 acpi_state)
{
#ifdef CONFIG_ACPI_SLEEP
/* do we have a wakeup address for S2 and S3? */
@@ -44,6 +59,8 @@ int acpi_sleep_prepare(u32 acpi_state)
ACPI_FLUSH_CPU_CACHE();
acpi_enable_wakeup_device_prep(acpi_state);
#endif
+ printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
+ acpi_state);
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
@@ -63,17 +80,25 @@ static u32 acpi_suspend_states[] = {
static int init_8259A_after_S1;
/**
- * acpi_pm_set_target - Set the target system sleep state to the state
+ * acpi_pm_begin - Set the target system sleep state to the state
* associated with given @pm_state, if supported.
*/
-static int acpi_pm_set_target(suspend_state_t pm_state)
+static int acpi_pm_begin(suspend_state_t pm_state)
{
u32 acpi_state = acpi_suspend_states[pm_state];
int error = 0;
if (sleep_states[acpi_state]) {
acpi_target_sleep_state = acpi_state;
+ if (new_pts_ordering)
+ return 0;
+
+ error = acpi_sleep_prepare(acpi_state);
+ if (error)
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ else
+ acpi_sleep_finish_wake_up = true;
} else {
printk(KERN_ERR "ACPI does not support this state: %d\n",
pm_state);
@@ -91,12 +116,17 @@ static int acpi_pm_set_target(suspend_state_t pm_state)
static int acpi_pm_prepare(void)
{
- int error = acpi_sleep_prepare(acpi_target_sleep_state);
+ if (new_pts_ordering) {
+ int error = acpi_sleep_prepare(acpi_target_sleep_state);
- if (error)
- acpi_target_sleep_state = ACPI_STATE_S0;
+ if (error) {
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ return error;
+ }
+ acpi_sleep_finish_wake_up = true;
+ }
- return error;
+ return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
}
/**
@@ -120,10 +150,8 @@ static int acpi_pm_enter(suspend_state_t pm_state)
if (acpi_state == ACPI_STATE_S3) {
int error = acpi_save_state_mem();
- if (error) {
- acpi_target_sleep_state = ACPI_STATE_S0;
+ if (error)
return error;
- }
}
local_irq_save(flags);
@@ -139,6 +167,9 @@ static int acpi_pm_enter(suspend_state_t pm_state)
break;
}
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(acpi_state);
+
/* ACPI 3.0 specs (P62) says that it's the responsabilty
* of the OSPM to clear the status bit [ implying that the
* POWER_BUTTON event should not reach userspace ]
@@ -146,6 +177,13 @@ static int acpi_pm_enter(suspend_state_t pm_state)
if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3))
acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
+ /*
+ * Disable and clear GPE status before interrupt is enabled. Some GPEs
+ * (like wakeup GPE) haven't handler, this can avoid such GPE misfire.
+ * acpi_leave_sleep_state will reenable specific GPEs later
+ */
+ acpi_hw_disable_all_gpes();
+
local_irq_restore(flags);
printk(KERN_DEBUG "Back to C!\n");
@@ -157,7 +195,7 @@ static int acpi_pm_enter(suspend_state_t pm_state)
}
/**
- * acpi_pm_finish - Finish up suspend sequence.
+ * acpi_pm_finish - Instruct the platform to leave a sleep state.
*
* This is called after we wake back up (or if entering the sleep state
* failed).
@@ -174,6 +212,7 @@ static void acpi_pm_finish(void)
acpi_set_firmware_waking_vector((acpi_physical_address) 0);
acpi_target_sleep_state = ACPI_STATE_S0;
+ acpi_sleep_finish_wake_up = false;
#ifdef CONFIG_X86
if (init_8259A_after_S1) {
@@ -183,6 +222,20 @@ static void acpi_pm_finish(void)
#endif
}
+/**
+ * acpi_pm_end - Finish up suspend sequence.
+ */
+
+static void acpi_pm_end(void)
+{
+ /*
+ * This is necessary in case acpi_pm_finish() is not called directly
+ * during a failing transition to a sleep state.
+ */
+ if (acpi_sleep_finish_wake_up)
+ acpi_pm_finish();
+}
+
static int acpi_pm_state_valid(suspend_state_t pm_state)
{
u32 acpi_state;
@@ -201,10 +254,11 @@ static int acpi_pm_state_valid(suspend_state_t pm_state)
static struct platform_suspend_ops acpi_pm_ops = {
.valid = acpi_pm_state_valid,
- .set_target = acpi_pm_set_target,
+ .begin = acpi_pm_begin,
.prepare = acpi_pm_prepare,
.enter = acpi_pm_enter,
.finish = acpi_pm_finish,
+ .end = acpi_pm_end,
};
/*
@@ -229,15 +283,36 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATION
-static int acpi_hibernation_start(void)
+static int acpi_hibernation_begin(void)
{
+ int error;
+
acpi_target_sleep_state = ACPI_STATE_S4;
- return 0;
+ if (new_pts_ordering)
+ return 0;
+
+ error = acpi_sleep_prepare(ACPI_STATE_S4);
+ if (error)
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ else
+ acpi_sleep_finish_wake_up = true;
+
+ return error;
}
static int acpi_hibernation_prepare(void)
{
- return acpi_sleep_prepare(ACPI_STATE_S4);
+ if (new_pts_ordering) {
+ int error = acpi_sleep_prepare(ACPI_STATE_S4);
+
+ if (error) {
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ return error;
+ }
+ acpi_sleep_finish_wake_up = true;
+ }
+
+ return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
}
static int acpi_hibernation_enter(void)
@@ -251,6 +326,8 @@ static int acpi_hibernation_enter(void)
acpi_enable_wakeup_device(ACPI_STATE_S4);
/* This shouldn't return. If it returns, we have a problem */
status = acpi_enter_sleep_state(ACPI_STATE_S4);
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4);
local_irq_restore(flags);
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
@@ -263,15 +340,12 @@ static void acpi_hibernation_leave(void)
* enable it here.
*/
acpi_enable();
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4);
}
static void acpi_hibernation_finish(void)
{
- /*
- * If ACPI is not enabled by the BIOS and the boot kernel, we need to
- * enable it here.
- */
- acpi_enable();
acpi_disable_wakeup_device(ACPI_STATE_S4);
acpi_leave_sleep_state(ACPI_STATE_S4);
@@ -279,6 +353,17 @@ static void acpi_hibernation_finish(void)
acpi_set_firmware_waking_vector((acpi_physical_address) 0);
acpi_target_sleep_state = ACPI_STATE_S0;
+ acpi_sleep_finish_wake_up = false;
+}
+
+static void acpi_hibernation_end(void)
+{
+ /*
+ * This is necessary in case acpi_hibernation_finish() is not called
+ * directly during a failing transition to the sleep state.
+ */
+ if (acpi_sleep_finish_wake_up)
+ acpi_hibernation_finish();
}
static int acpi_hibernation_pre_restore(void)
@@ -296,7 +381,8 @@ static void acpi_hibernation_restore_cleanup(void)
}
static struct platform_hibernation_ops acpi_hibernation_ops = {
- .start = acpi_hibernation_start,
+ .begin = acpi_hibernation_begin,
+ .end = acpi_hibernation_end,
.pre_snapshot = acpi_hibernation_prepare,
.finish = acpi_hibernation_finish,
.prepare = acpi_hibernation_prepare,
@@ -386,11 +472,20 @@ int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p)
if (acpi_target_sleep_state == ACPI_STATE_S0 ||
(wake && adev->wakeup.state.enabled &&
adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
+ acpi_status status;
+
acpi_method[3] = 'W';
- acpi_evaluate_integer(handle, acpi_method, NULL, &d_max);
- /* Sanity check */
- if (d_max < d_min)
+ status = acpi_evaluate_integer(handle, acpi_method, NULL,
+ &d_max);
+ if (ACPI_FAILURE(status)) {
+ d_max = d_min;
+ } else if (d_max < d_min) {
+ /* Warn the user of the broken DSDT */
+ printk(KERN_WARNING "ACPI: Wrong value from %s\n",
+ acpi_method);
+ /* Sanitize it */
d_min = d_max;
+ }
}
if (d_min_p)
@@ -403,6 +498,7 @@ static void acpi_power_off_prepare(void)
{
/* Prepare to power off the system */
acpi_sleep_prepare(ACPI_STATE_S5);
+ acpi_hw_disable_all_gpes();
}
static void acpi_power_off(void)
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 1538355c266b..f8df5217d477 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -178,6 +178,9 @@ static int get_date_field(char **p, u32 * value)
* Try to find delimeter, only to insert null. The end of the
* string won't have one, but is still valid.
*/
+ if (*p == NULL)
+ return result;
+
next = strpbrk(*p, "- :");
if (next)
*next++ = '\0';
@@ -190,6 +193,8 @@ static int get_date_field(char **p, u32 * value)
if (next)
*p = next;
+ else
+ *p = NULL;
return result;
}
@@ -251,27 +256,6 @@ acpi_system_write_alarm(struct file *file,
if ((result = get_date_field(&p, &sec)))
goto end;
- if (sec > 59) {
- min += 1;
- sec -= 60;
- }
- if (min > 59) {
- hr += 1;
- min -= 60;
- }
- if (hr > 23) {
- day += 1;
- hr -= 24;
- }
- if (day > 31) {
- mo += 1;
- day -= 31;
- }
- if (mo > 12) {
- yr += 1;
- mo -= 12;
- }
-
spin_lock_irq(&rtc_lock);
rtc_control = CMOS_READ(RTC_CONTROL);
@@ -288,24 +272,24 @@ acpi_system_write_alarm(struct file *file,
spin_unlock_irq(&rtc_lock);
if (sec > 59) {
- min++;
- sec -= 60;
+ min += sec/60;
+ sec = sec%60;
}
if (min > 59) {
- hr++;
- min -= 60;
+ hr += min/60;
+ min = min%60;
}
if (hr > 23) {
- day++;
- hr -= 24;
+ day += hr/24;
+ hr = hr%24;
}
if (day > 31) {
- mo++;
- day -= 31;
+ mo += day/32;
+ day = day%32;
}
if (mo > 12) {
- yr++;
- mo -= 12;
+ yr += mo/13;
+ mo = mo%13;
}
spin_lock_irq(&rtc_lock);
diff --git a/drivers/acpi/sleep/sleep.h b/drivers/acpi/sleep/sleep.h
index a2ea125ae2d0..cfaf8f5b0a14 100644
--- a/drivers/acpi/sleep/sleep.h
+++ b/drivers/acpi/sleep/sleep.h
@@ -5,5 +5,3 @@ extern int acpi_suspend (u32 state);
extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
extern void acpi_enable_wakeup_device(u8 sleep_state);
extern void acpi_disable_wakeup_device(u8 sleep_state);
-
-extern int acpi_sleep_prepare(u32 acpi_state);
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-06 22:09:38 +0000