[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/acpi/sleep.c b/ap/os/linux/linux-3.4.x/drivers/acpi/sleep.c
new file mode 100644
index 0000000..189c704
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/acpi/sleep.c
@@ -0,0 +1,951 @@
+/*
+ * sleep.c - ACPI sleep support.
+ *
+ * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
+ * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
+ * Copyright (c) 2000-2003 Patrick Mochel
+ * Copyright (c) 2003 Open Source Development Lab
+ *
+ * This file is released under the GPLv2.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/dmi.h>
+#include <linux/device.h>
+#include <linux/suspend.h>
+#include <linux/reboot.h>
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+
+#include <asm/io.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+#include "internal.h"
+#include "sleep.h"
+
+u8 wake_sleep_flags = ACPI_NO_OPTIONAL_METHODS;
+static unsigned int gts, bfs;
+static int set_param_wake_flag(const char *val, struct kernel_param *kp)
+{
+ int ret = param_set_int(val, kp);
+
+ if (ret)
+ return ret;
+
+ if (kp->arg == (const char *)>s) {
+ if (gts)
+ wake_sleep_flags |= ACPI_EXECUTE_GTS;
+ else
+ wake_sleep_flags &= ~ACPI_EXECUTE_GTS;
+ }
+ if (kp->arg == (const char *)&bfs) {
+ if (bfs)
+ wake_sleep_flags |= ACPI_EXECUTE_BFS;
+ else
+ wake_sleep_flags &= ~ACPI_EXECUTE_BFS;
+ }
+ return ret;
+}
+module_param_call(gts, set_param_wake_flag, param_get_int, >s, 0644);
+module_param_call(bfs, set_param_wake_flag, param_get_int, &bfs, 0644);
+MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
+MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
+
+static 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
+ /* do we have a wakeup address for S2 and S3? */
+ if (acpi_state == ACPI_STATE_S3) {
+ if (!acpi_wakeup_address) {
+ return -EFAULT;
+ }
+ acpi_set_firmware_waking_vector(
+ (acpi_physical_address)acpi_wakeup_address);
+
+ }
+ ACPI_FLUSH_CPU_CACHE();
+#endif
+ printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
+ acpi_state);
+ acpi_enable_wakeup_devices(acpi_state);
+ acpi_enter_sleep_state_prep(acpi_state);
+ return 0;
+}
+
+#ifdef CONFIG_ACPI_SLEEP
+static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+
+/*
+ * The ACPI specification wants us to save NVS memory regions during hibernation
+ * and to restore them during the subsequent resume. Windows does that also for
+ * suspend to RAM. However, it is known that this mechanism does not work on
+ * all machines, so we allow the user to disable it with the help of the
+ * 'acpi_sleep=nonvs' kernel command line option.
+ */
+static bool nvs_nosave;
+
+void __init acpi_nvs_nosave(void)
+{
+ nvs_nosave = 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.
+ */
+static bool old_suspend_ordering;
+
+void __init acpi_old_suspend_ordering(void)
+{
+ old_suspend_ordering = true;
+}
+
+static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
+{
+ acpi_old_suspend_ordering();
+ return 0;
+}
+
+static int __init init_nvs_nosave(const struct dmi_system_id *d)
+{
+ acpi_nvs_nosave();
+ 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"),
+ },
+ },
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "M2N8L"),
+ },
+ },
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Panasonic CF51-2L",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR,
+ "Matsushita Electric Industrial Co.,Ltd."),
+ DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VGN-FW41E_H",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VGN-FW21E",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VPCEB17FX",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VGN-SR11M",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Everex StepNote Series",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VPCEB1Z1E",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VGN-NW130D",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VPCCW29FX",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Averatec AV1020-ED2",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
+ },
+ },
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Asus A8N-SLI DELUXE",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
+ },
+ },
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Asus A8N-SLI Premium",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Sony Vaio VGN-SR26GN_P",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"),
+ },
+ },
+ {
+ .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"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Asus K54C",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "K54C"),
+ },
+ },
+ {
+ .callback = init_nvs_nosave,
+ .ident = "Asus K54HR",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"),
+ },
+ },
+ {},
+};
+
+static void acpi_sleep_dmi_check(void)
+{
+ dmi_check_system(acpisleep_dmi_table);
+}
+
+/**
+ * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
+ */
+static int acpi_pm_freeze(void)
+{
+ acpi_disable_all_gpes();
+ acpi_os_wait_events_complete(NULL);
+ acpi_ec_block_transactions();
+ return 0;
+}
+
+/**
+ * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
+ */
+static int acpi_pm_pre_suspend(void)
+{
+ acpi_pm_freeze();
+ return suspend_nvs_save();
+}
+
+/**
+ * __acpi_pm_prepare - Prepare the platform to enter the target state.
+ *
+ * If necessary, set the firmware waking vector and do arch-specific
+ * nastiness to get the wakeup code to the waking vector.
+ */
+static int __acpi_pm_prepare(void)
+{
+ int error = acpi_sleep_prepare(acpi_target_sleep_state);
+ if (error)
+ acpi_target_sleep_state = ACPI_STATE_S0;
+
+ return error;
+}
+
+/**
+ * acpi_pm_prepare - Prepare the platform to enter the target sleep
+ * state and disable the GPEs.
+ */
+static int acpi_pm_prepare(void)
+{
+ int error = __acpi_pm_prepare();
+ if (!error)
+ error = acpi_pm_pre_suspend();
+
+ return error;
+}
+
+/**
+ * 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).
+ */
+static void acpi_pm_finish(void)
+{
+ u32 acpi_state = acpi_target_sleep_state;
+
+ acpi_ec_unblock_transactions();
+ suspend_nvs_free();
+
+ if (acpi_state == ACPI_STATE_S0)
+ return;
+
+ printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
+ acpi_state);
+ acpi_disable_wakeup_devices(acpi_state);
+ acpi_leave_sleep_state(acpi_state);
+
+ /* reset firmware waking vector */
+ acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+
+ acpi_target_sleep_state = ACPI_STATE_S0;
+}
+
+/**
+ * acpi_pm_end - Finish up suspend sequence.
+ */
+static void acpi_pm_end(void)
+{
+ /*
+ * This is necessary in case acpi_pm_finish() is not called during a
+ * failing transition to a sleep state.
+ */
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
+}
+#else /* !CONFIG_ACPI_SLEEP */
+#define acpi_target_sleep_state ACPI_STATE_S0
+static inline void acpi_sleep_dmi_check(void) {}
+#endif /* CONFIG_ACPI_SLEEP */
+
+#ifdef CONFIG_SUSPEND
+static u32 acpi_suspend_states[] = {
+ [PM_SUSPEND_ON] = ACPI_STATE_S0,
+ [PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
+ [PM_SUSPEND_MEM] = ACPI_STATE_S3,
+ [PM_SUSPEND_MAX] = ACPI_STATE_S5
+};
+
+/**
+ * acpi_suspend_begin - Set the target system sleep state to the state
+ * associated with given @pm_state, if supported.
+ */
+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();
+ if (error)
+ return error;
+
+ 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);
+ error = -ENOSYS;
+ }
+ return error;
+}
+
+/**
+ * acpi_suspend_enter - Actually enter a sleep state.
+ * @pm_state: ignored
+ *
+ * Flush caches and go to sleep. For STR we have to call arch-specific
+ * assembly, which in turn call acpi_enter_sleep_state().
+ * It's unfortunate, but it works. Please fix if you're feeling frisky.
+ */
+static int acpi_suspend_enter(suspend_state_t pm_state)
+{
+ acpi_status status = AE_OK;
+ u32 acpi_state = acpi_target_sleep_state;
+ int error;
+
+ ACPI_FLUSH_CPU_CACHE();
+
+ switch (acpi_state) {
+ case ACPI_STATE_S1:
+ barrier();
+ status = acpi_enter_sleep_state(acpi_state, wake_sleep_flags);
+ break;
+
+ case ACPI_STATE_S3:
+ error = acpi_suspend_lowlevel();
+ if (error)
+ return error;
+ pr_info(PREFIX "Low-level resume complete\n");
+ break;
+ }
+
+ /* This violates the spec but is required for bug compatibility. */
+ acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
+
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(acpi_state, wake_sleep_flags);
+
+ /* ACPI 3.0 specs (P62) says that it's the responsibility
+ * of the OSPM to clear the status bit [ implying that the
+ * POWER_BUTTON event should not reach userspace ]
+ */
+ 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_disable_all_gpes();
+ /* Allow EC transactions to happen. */
+ acpi_ec_unblock_transactions_early();
+
+ suspend_nvs_restore();
+
+ return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+static int acpi_suspend_state_valid(suspend_state_t pm_state)
+{
+ u32 acpi_state;
+
+ switch (pm_state) {
+ case PM_SUSPEND_ON:
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ acpi_state = acpi_suspend_states[pm_state];
+
+ return sleep_states[acpi_state];
+ default:
+ return 0;
+ }
+}
+
+static const struct platform_suspend_ops acpi_suspend_ops = {
+ .valid = acpi_suspend_state_valid,
+ .begin = acpi_suspend_begin,
+ .prepare_late = acpi_pm_prepare,
+ .enter = acpi_suspend_enter,
+ .wake = acpi_pm_finish,
+ .end = acpi_pm_end,
+};
+
+/**
+ * acpi_suspend_begin_old - Set the target system sleep state to the
+ * state associated with given @pm_state, if supported, and
+ * execute the _PTS control method. This function is used if the
+ * pre-ACPI 2.0 suspend ordering has been requested.
+ */
+static int acpi_suspend_begin_old(suspend_state_t pm_state)
+{
+ int error = acpi_suspend_begin(pm_state);
+ if (!error)
+ error = __acpi_pm_prepare();
+
+ return error;
+}
+
+/*
+ * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
+ * been requested.
+ */
+static const struct platform_suspend_ops acpi_suspend_ops_old = {
+ .valid = acpi_suspend_state_valid,
+ .begin = acpi_suspend_begin_old,
+ .prepare_late = acpi_pm_pre_suspend,
+ .enter = acpi_suspend_enter,
+ .wake = acpi_pm_finish,
+ .end = acpi_pm_end,
+ .recover = acpi_pm_finish,
+};
+#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)
+{
+ int error;
+
+ error = nvs_nosave ? 0 : suspend_nvs_alloc();
+ if (!error) {
+ acpi_target_sleep_state = ACPI_STATE_S4;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
+ }
+
+ return error;
+}
+
+static int acpi_hibernation_enter(void)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FLUSH_CPU_CACHE();
+
+ /* This shouldn't return. If it returns, we have a problem */
+ status = acpi_enter_sleep_state(ACPI_STATE_S4, wake_sleep_flags);
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags);
+
+ return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+static void acpi_hibernation_leave(void)
+{
+ /*
+ * If ACPI is not enabled by the BIOS and the boot kernel, we need to
+ * enable it here.
+ */
+ acpi_enable();
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags);
+ /* 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");
+ }
+ /* Restore the NVS memory area */
+ suspend_nvs_restore();
+ /* Allow EC transactions to happen. */
+ acpi_ec_unblock_transactions_early();
+}
+
+static void acpi_pm_thaw(void)
+{
+ acpi_ec_unblock_transactions();
+ acpi_enable_all_runtime_gpes();
+}
+
+static const struct platform_hibernation_ops acpi_hibernation_ops = {
+ .begin = acpi_hibernation_begin,
+ .end = acpi_pm_end,
+ .pre_snapshot = acpi_pm_prepare,
+ .finish = acpi_pm_finish,
+ .prepare = acpi_pm_prepare,
+ .enter = acpi_hibernation_enter,
+ .leave = acpi_hibernation_leave,
+ .pre_restore = acpi_pm_freeze,
+ .restore_cleanup = acpi_pm_thaw,
+};
+
+/**
+ * acpi_hibernation_begin_old - Set the target system sleep state to
+ * ACPI_STATE_S4 and execute the _PTS control method. This
+ * function is used if the pre-ACPI 2.0 suspend ordering has been
+ * requested.
+ */
+static int acpi_hibernation_begin_old(void)
+{
+ 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) {
+ if (!nvs_nosave)
+ error = suspend_nvs_alloc();
+ if (!error)
+ acpi_target_sleep_state = ACPI_STATE_S4;
+ }
+ return error;
+}
+
+/*
+ * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
+ * been requested.
+ */
+static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
+ .begin = acpi_hibernation_begin_old,
+ .end = acpi_pm_end,
+ .pre_snapshot = acpi_pm_pre_suspend,
+ .prepare = acpi_pm_freeze,
+ .finish = acpi_pm_finish,
+ .enter = acpi_hibernation_enter,
+ .leave = acpi_hibernation_leave,
+ .pre_restore = acpi_pm_freeze,
+ .restore_cleanup = acpi_pm_thaw,
+ .recover = acpi_pm_finish,
+};
+#endif /* CONFIG_HIBERNATION */
+
+int acpi_suspend(u32 acpi_state)
+{
+ suspend_state_t states[] = {
+ [1] = PM_SUSPEND_STANDBY,
+ [3] = PM_SUSPEND_MEM,
+ [5] = PM_SUSPEND_MAX
+ };
+
+ if (acpi_state < 6 && states[acpi_state])
+ return pm_suspend(states[acpi_state]);
+ if (acpi_state == 4)
+ return hibernate();
+ 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
+ * Return value: preferred power state of the device on success, -ENODEV on
+ * failure (ie. if there's no 'struct acpi_device' for @dev)
+ *
+ * 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)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
+ struct acpi_device *adev;
+ char acpi_method[] = "_SxD";
+ 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");
+ return -ENODEV;
+ }
+
+ acpi_method[2] = '0' + acpi_target_sleep_state;
+ /*
+ * If the sleep state is S0, we will return D3, but if the device has
+ * _S0W, we will use the value from _S0W
+ */
+ 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_min_p)
+ *d_min_p = d_min;
+ return d_max;
+}
+#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;
+}
+
+/**
+ * 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 */
+ acpi_sleep_prepare(ACPI_STATE_S5);
+ acpi_disable_all_gpes();
+}
+
+static void acpi_power_off(void)
+{
+ /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
+ printk(KERN_DEBUG "%s called\n", __func__);
+ local_irq_disable();
+ acpi_enter_sleep_state(ACPI_STATE_S5, wake_sleep_flags);
+}
+
+/*
+ * ACPI 2.0 created the optional _GTS and _BFS,
+ * but industry adoption has been neither rapid nor broad.
+ *
+ * Linux gets into trouble when it executes poorly validated
+ * paths through the BIOS, so disable _GTS and _BFS by default,
+ * but do speak up and offer the option to enable them.
+ */
+static void __init acpi_gts_bfs_check(void)
+{
+ acpi_handle dummy;
+
+ if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__GTS, &dummy)))
+ {
+ printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n");
+ printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, "
+ "please notify linux-acpi@vger.kernel.org\n");
+ }
+ if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__BFS, &dummy)))
+ {
+ printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n");
+ printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, "
+ "please notify linux-acpi@vger.kernel.org\n");
+ }
+}
+
+int __init acpi_sleep_init(void)
+{
+ acpi_status status;
+ u8 type_a, type_b;
+#ifdef CONFIG_SUSPEND
+ int i = 0;
+#endif
+
+ if (acpi_disabled)
+ return 0;
+
+ acpi_sleep_dmi_check();
+
+ sleep_states[ACPI_STATE_S0] = 1;
+ printk(KERN_INFO PREFIX "(supports S0");
+
+#ifdef CONFIG_SUSPEND
+ for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) {
+ status = acpi_get_sleep_type_data(i, &type_a, &type_b);
+ if (ACPI_SUCCESS(status)) {
+ sleep_states[i] = 1;
+ printk(" S%d", i);
+ }
+ }
+
+ suspend_set_ops(old_suspend_ordering ?
+ &acpi_suspend_ops_old : &acpi_suspend_ops);
+#endif
+
+#ifdef CONFIG_HIBERNATION
+ status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
+ if (ACPI_SUCCESS(status)) {
+ hibernation_set_ops(old_suspend_ordering ?
+ &acpi_hibernation_ops_old : &acpi_hibernation_ops);
+ sleep_states[ACPI_STATE_S4] = 1;
+ printk(" S4");
+ if (!nosigcheck) {
+ acpi_get_table(ACPI_SIG_FACS, 1,
+ (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);
+ if (ACPI_SUCCESS(status)) {
+ sleep_states[ACPI_STATE_S5] = 1;
+ printk(" S5");
+ pm_power_off_prepare = acpi_power_off_prepare;
+ 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);
+ acpi_gts_bfs_check();
+ return 0;
+}