diff options
Diffstat (limited to 'drivers/acpi/sleep/main.c')
| -rw-r--r-- | drivers/acpi/sleep/main.c | 108 |
1 files changed, 103 insertions, 5 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c index 0489a7d1d42c..26571bafb158 100644 --- a/drivers/acpi/sleep/main.c +++ b/drivers/acpi/sleep/main.c @@ -15,6 +15,7 @@ #include <linux/dmi.h> #include <linux/device.h> #include <linux/suspend.h> +#include <linux/reboot.h> #include <asm/io.h> @@ -24,6 +25,36 @@ u8 sleep_states[ACPI_S_STATE_COUNT]; +static void acpi_sleep_tts_switch(u32 acpi_state) +{ + union acpi_object in_arg = { ACPI_TYPE_INTEGER }; + struct acpi_object_list arg_list = { 1, &in_arg }; + acpi_status status = AE_OK; + + in_arg.integer.value = acpi_state; + status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + /* + * OS can't evaluate the _TTS object correctly. Some warning + * message will be printed. But it won't break anything. + */ + printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); + } +} + +static int tts_notify_reboot(struct notifier_block *this, + unsigned long code, void *x) +{ + acpi_sleep_tts_switch(ACPI_STATE_S5); + return NOTIFY_DONE; +} + +static struct notifier_block tts_notifier = { + .notifier_call = tts_notify_reboot, + .next = NULL, + .priority = 0, +}; + static int acpi_sleep_prepare(u32 acpi_state) { #ifdef CONFIG_ACPI_SLEEP @@ -45,9 +76,8 @@ static int acpi_sleep_prepare(u32 acpi_state) return 0; } -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_ACPI_SLEEP static u32 acpi_target_sleep_state = ACPI_STATE_S0; - /* * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the * user to request that behavior by using the 'acpi_old_suspend_ordering' @@ -131,8 +161,9 @@ static void acpi_pm_end(void) * failing transition to a sleep state. */ acpi_target_sleep_state = ACPI_STATE_S0; + acpi_sleep_tts_switch(acpi_target_sleep_state); } -#endif /* CONFIG_PM_SLEEP */ +#endif /* CONFIG_ACPI_SLEEP */ #ifdef CONFIG_SUSPEND extern void do_suspend_lowlevel(void); @@ -155,6 +186,7 @@ static int acpi_suspend_begin(suspend_state_t pm_state) if (sleep_states[acpi_state]) { acpi_target_sleep_state = acpi_state; + acpi_sleep_tts_switch(acpi_target_sleep_state); } else { printk(KERN_ERR "ACPI does not support this state: %d\n", pm_state); @@ -200,6 +232,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state) break; } + /* If ACPI is not enabled by the BIOS, we need to enable it here. */ + acpi_enable(); /* Reprogram control registers and execute _BFS */ acpi_leave_sleep_state_prep(acpi_state); @@ -280,12 +314,48 @@ static struct platform_suspend_ops acpi_suspend_ops_old = { .end = acpi_pm_end, .recover = acpi_pm_finish, }; + +static int __init init_old_suspend_ordering(const struct dmi_system_id *d) +{ + old_suspend_ordering = true; + return 0; +} + +static struct dmi_system_id __initdata acpisleep_dmi_table[] = { + { + .callback = init_old_suspend_ordering, + .ident = "Abit KN9 (nForce4 variant)", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), + DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), + }, + }, + { + .callback = init_old_suspend_ordering, + .ident = "HP xw4600 Workstation", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), + }, + }, + {}, +}; #endif /* CONFIG_SUSPEND */ #ifdef CONFIG_HIBERNATION +static unsigned long s4_hardware_signature; +static struct acpi_table_facs *facs; +static bool nosigcheck; + +void __init acpi_no_s4_hw_signature(void) +{ + nosigcheck = true; +} + static int acpi_hibernation_begin(void) { acpi_target_sleep_state = ACPI_STATE_S4; + acpi_sleep_tts_switch(acpi_target_sleep_state); return 0; } @@ -316,6 +386,12 @@ static void acpi_hibernation_leave(void) acpi_enable(); /* Reprogram control registers and execute _BFS */ acpi_leave_sleep_state_prep(ACPI_STATE_S4); + /* Check the hardware signature */ + if (facs && s4_hardware_signature != facs->hardware_signature) { + printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " + "cannot resume!\n"); + panic("ACPI S4 hardware signature mismatch"); + } } static void acpi_pm_enable_gpes(void) @@ -343,7 +419,15 @@ static struct platform_hibernation_ops acpi_hibernation_ops = { */ static int acpi_hibernation_begin_old(void) { - int error = acpi_sleep_prepare(ACPI_STATE_S4); + int error; + /* + * The _TTS object should always be evaluated before the _PTS object. + * When the old_suspended_ordering is true, the _PTS object is + * evaluated in the acpi_sleep_prepare. + */ + acpi_sleep_tts_switch(ACPI_STATE_S4); + + error = acpi_sleep_prepare(ACPI_STATE_S4); if (!error) acpi_target_sleep_state = ACPI_STATE_S4; @@ -411,7 +495,7 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) acpi_handle handle = DEVICE_ACPI_HANDLE(dev); struct acpi_device *adev; char acpi_method[] = "_SxD"; - unsigned long d_min, d_max; + unsigned long long d_min, d_max; if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { printk(KERN_DEBUG "ACPI handle has no context!\n"); @@ -516,6 +600,8 @@ int __init acpi_sleep_init(void) u8 type_a, type_b; #ifdef CONFIG_SUSPEND int i = 0; + + dmi_check_system(acpisleep_dmi_table); #endif if (acpi_disabled) @@ -544,6 +630,13 @@ int __init acpi_sleep_init(void) &acpi_hibernation_ops_old : &acpi_hibernation_ops); sleep_states[ACPI_STATE_S4] = 1; printk(" S4"); + if (!nosigcheck) { + acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, + (struct acpi_table_header **)&facs); + if (facs) + s4_hardware_signature = + facs->hardware_signature; + } } #endif status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); @@ -554,5 +647,10 @@ int __init acpi_sleep_init(void) pm_power_off = acpi_power_off; } printk(")\n"); + /* + * Register the tts_notifier to reboot notifier list so that the _TTS + * object can also be evaluated when the system enters S5. + */ + register_reboot_notifier(&tts_notifier); return 0; } |