diff options
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 203 |
1 files changed, 30 insertions, 173 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index fdcdbb65291..1e25319164f 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -18,7 +18,6 @@ #include <linux/reboot.h> #include <linux/acpi.h> #include <linux/module.h> -#include <linux/pm_runtime.h> #include <asm/io.h> @@ -81,6 +80,12 @@ static int acpi_sleep_prepare(u32 acpi_state) #ifdef CONFIG_ACPI_SLEEP static u32 acpi_target_sleep_state = ACPI_STATE_S0; + +u32 acpi_target_system_state(void) +{ + return acpi_target_sleep_state; +} + static bool pwr_btn_event_pending; /* @@ -98,6 +103,21 @@ void __init acpi_nvs_nosave(void) } /* + * The ACPI specification wants us to save NVS memory regions during hibernation + * but says nothing about saving NVS during S3. Not all versions of Windows + * save NVS on S3 suspend either, and it is clear that not all systems need + * NVS to be saved at S3 time. To improve suspend/resume time, allow the + * user to disable saving NVS on S3 if their system does not require it, but + * continue to save/restore NVS for S4 as specified. + */ +static bool nvs_nosave_s3; + +void __init acpi_nvs_nosave_s3(void) +{ + nvs_nosave_s3 = true; +} + +/* * 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' * kernel command line option that causes the following variable to be set. @@ -243,7 +263,7 @@ static int acpi_suspend_begin(suspend_state_t pm_state) u32 acpi_state = acpi_suspend_states[pm_state]; int error = 0; - error = nvs_nosave ? 0 : suspend_nvs_alloc(); + error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); if (error) return error; @@ -519,6 +539,14 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = { }, { .callback = init_nvs_nosave, + .ident = "Sony Vaio VPCEB1S1E", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), + }, + }, + { + .callback = init_nvs_nosave, .ident = "Sony Vaio VGN-FW520F", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), @@ -681,177 +709,6 @@ int acpi_suspend(u32 acpi_state) return -EINVAL; } -#ifdef CONFIG_PM -/** - * acpi_pm_device_sleep_state - return preferred power state of ACPI device - * in the system sleep state given by %acpi_target_sleep_state - * @dev: device to examine; its driver model wakeup flags control - * whether it should be able to wake up the system - * @d_min_p: used to store the upper limit of allowed states range - * @d_max_in: specify the lowest allowed states - * Return value: preferred power state of the device on success, -ENODEV - * (ie. if there's no 'struct acpi_device' for @dev) or -EINVAL on failure - * - * Find the lowest power (highest number) ACPI device power state that - * device @dev can be in while the system is in the sleep state represented - * by %acpi_target_sleep_state. If @wake is nonzero, the device should be - * able to wake up the system from this sleep state. If @d_min_p is set, - * the highest power (lowest number) device power state of @dev allowed - * in this system sleep state is stored at the location pointed to by it. - * - * The caller must ensure that @dev is valid before using this function. - * The caller is also responsible for figuring out if the device is - * supposed to be able to wake up the system and passing this information - * via @wake. - */ - -int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in) -{ - acpi_handle handle = DEVICE_ACPI_HANDLE(dev); - struct acpi_device *adev; - char acpi_method[] = "_SxD"; - unsigned long long d_min, d_max; - - if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) - return -EINVAL; - if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { - printk(KERN_DEBUG "ACPI handle has no context!\n"); - return -ENODEV; - } - - acpi_method[2] = '0' + acpi_target_sleep_state; - /* - * If the sleep state is S0, the lowest limit from ACPI is D3, - * but if the device has _S0W, we will use the value from _S0W - * as the lowest limit from ACPI. Finally, we will constrain - * the lowest limit with the specified one. - */ - d_min = ACPI_STATE_D0; - d_max = ACPI_STATE_D3; - - /* - * If present, _SxD methods return the minimum D-state (highest power - * state) we can use for the corresponding S-states. Otherwise, the - * minimum D-state is D0 (ACPI 3.x). - * - * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer - * provided -- that's our fault recovery, we ignore retval. - */ - if (acpi_target_sleep_state > ACPI_STATE_S0) - acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); - - /* - * If _PRW says we can wake up the system from the target sleep state, - * the D-state returned by _SxD is sufficient for that (we assume a - * wakeup-aware driver if wake is set). Still, if _SxW exists - * (ACPI 3.x), it should return the maximum (lowest power) D-state that - * can wake the system. _S0W may be valid, too. - */ - if (acpi_target_sleep_state == ACPI_STATE_S0 || - (device_may_wakeup(dev) && adev->wakeup.flags.valid && - adev->wakeup.sleep_state >= acpi_target_sleep_state)) { - acpi_status status; - - acpi_method[3] = 'W'; - status = acpi_evaluate_integer(handle, acpi_method, NULL, - &d_max); - if (ACPI_FAILURE(status)) { - if (acpi_target_sleep_state != ACPI_STATE_S0 || - status != AE_NOT_FOUND) - 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_max_in < d_min) - return -EINVAL; - if (d_min_p) - *d_min_p = d_min; - /* constrain d_max with specified lowest limit (max number) */ - if (d_max > d_max_in) { - for (d_max = d_max_in; d_max > d_min; d_max--) { - if (adev->power.states[d_max].flags.valid) - break; - } - } - return d_max; -} -EXPORT_SYMBOL(acpi_pm_device_sleep_state); -#endif /* CONFIG_PM */ - -#ifdef CONFIG_PM_SLEEP -/** - * acpi_pm_device_run_wake - Enable/disable wake-up for given device. - * @phys_dev: Device to enable/disable the platform to wake-up the system for. - * @enable: Whether enable or disable the wake-up functionality. - * - * Find the ACPI device object corresponding to @pci_dev and try to - * enable/disable the GPE associated with it. - */ -int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) -{ - struct acpi_device *dev; - acpi_handle handle; - - if (!device_run_wake(phys_dev)) - return -EINVAL; - - handle = DEVICE_ACPI_HANDLE(phys_dev); - if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) { - dev_dbg(phys_dev, "ACPI handle has no context in %s!\n", - __func__); - return -ENODEV; - } - - if (enable) { - acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0); - acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); - } else { - acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); - acpi_disable_wakeup_device_power(dev); - } - - return 0; -} -EXPORT_SYMBOL(acpi_pm_device_run_wake); - -/** - * acpi_pm_device_sleep_wake - enable or disable the system wake-up - * capability of given device - * @dev: device to handle - * @enable: 'true' - enable, 'false' - disable the wake-up capability - */ -int acpi_pm_device_sleep_wake(struct device *dev, bool enable) -{ - acpi_handle handle; - struct acpi_device *adev; - int error; - - if (!device_can_wakeup(dev)) - return -EINVAL; - - handle = DEVICE_ACPI_HANDLE(dev); - if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { - dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); - return -ENODEV; - } - - error = enable ? - acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : - acpi_disable_wakeup_device_power(adev); - if (!error) - dev_info(dev, "wake-up capability %s by ACPI\n", - enable ? "enabled" : "disabled"); - - return error; -} -#endif /* CONFIG_PM_SLEEP */ - static void acpi_power_off_prepare(void) { /* Prepare to power off the system */ |