[mirror_ubuntu-artful-kernel.git] / drivers / acpi / sleep / main.c

/*
 * 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 <asm/io.h>

#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include "sleep.h"

u8 sleep_states[ACPI_S_STATE_COUNT];

#ifdef CONFIG_PM_SLEEP
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
#endif

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();
	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;
}

#ifdef CONFIG_SUSPEND
static struct platform_suspend_ops acpi_suspend_ops;

extern void do_suspend_lowlevel(void);

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
};

static int init_8259A_after_S1;

/**
 *	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;

	if (sleep_states[acpi_state]) {
		acpi_target_sleep_state = acpi_state;
	} else {
		printk(KERN_ERR "ACPI does not support this state: %d\n",
			pm_state);
		error = -ENOSYS;
	}
	return error;
}

/**
 *	acpi_suspend_prepare - Do preliminary suspend work.
 *
 *	If necessary, set the firmware waking vector and do arch-specific
 *	nastiness to get the wakeup code to the waking vector.
 */

static int acpi_suspend_prepare(void)
{
	int error = acpi_sleep_prepare(acpi_target_sleep_state);

	if (error) {
		acpi_target_sleep_state = ACPI_STATE_S0;
		return error;
	}

	return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
}

/**
 *	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;
	unsigned long flags = 0;
	u32 acpi_state = acpi_target_sleep_state;

	ACPI_FLUSH_CPU_CACHE();

	/* Do arch specific saving of state. */
	if (acpi_state == ACPI_STATE_S3) {
		int error = acpi_save_state_mem();

		if (error)
			return error;
	}

	local_irq_save(flags);
	acpi_enable_wakeup_device(acpi_state);
	switch (acpi_state) {
	case ACPI_STATE_S1:
		barrier();
		status = acpi_enter_sleep_state(acpi_state);
		break;

	case ACPI_STATE_S3:
		do_suspend_lowlevel();
		break;
	}

	/* Reprogram control registers and execute _BFS */
	acpi_leave_sleep_state_prep(acpi_state);

	/* 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_hw_disable_all_gpes();

	local_irq_restore(flags);
	printk(KERN_DEBUG "Back to C!\n");

	/* restore processor state */
	if (acpi_state == ACPI_STATE_S3)
		acpi_restore_state_mem();

	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
}

/**
 *	acpi_suspend_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_suspend_finish(void)
{
	u32 acpi_state = acpi_target_sleep_state;

	acpi_disable_wakeup_device(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;

#ifdef CONFIG_X86
	if (init_8259A_after_S1) {
		printk("Broken toshiba laptop -> kicking interrupts\n");
		init_8259A(0);
	}
#endif
}

/**
 *	acpi_suspend_end - Finish up suspend sequence.
 */

static void acpi_suspend_end(void)
{
	/*
	 * This is necessary in case acpi_suspend_finish() is not called during a
	 * failing transition to a sleep state.
	 */
	acpi_target_sleep_state = ACPI_STATE_S0;
}

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 struct platform_suspend_ops acpi_suspend_ops = {
	.valid = acpi_suspend_state_valid,
	.begin = acpi_suspend_begin,
	.prepare = acpi_suspend_prepare,
	.enter = acpi_suspend_enter,
	.finish = acpi_suspend_finish,
	.end = acpi_suspend_end,
};

/*
 * Toshiba fails to preserve interrupts over S1, reinitialization
 * of 8259 is needed after S1 resume.
 */
static int __init init_ints_after_s1(const struct dmi_system_id *d)
{
	printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
	init_8259A_after_S1 = 1;
	return 0;
}

static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
	{
	 .callback = init_ints_after_s1,
	 .ident = "Toshiba Satellite 4030cdt",
	 .matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),},
	 },
	{},
};
#endif /* CONFIG_SUSPEND */

#ifdef CONFIG_HIBERNATION
static int acpi_hibernation_begin(void)
{
	acpi_target_sleep_state = ACPI_STATE_S4;

	return 0;
}

static int acpi_hibernation_prepare(void)
{
	int error = acpi_sleep_prepare(ACPI_STATE_S4);

	if (error) {
		acpi_target_sleep_state = ACPI_STATE_S0;
		return error;
	}

	return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
}

static int acpi_hibernation_enter(void)
{
	acpi_status status = AE_OK;
	unsigned long flags = 0;

	ACPI_FLUSH_CPU_CACHE();

	local_irq_save(flags);
	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;
}

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);
}

static void acpi_hibernation_finish(void)
{
	acpi_disable_wakeup_device(ACPI_STATE_S4);
	acpi_leave_sleep_state(ACPI_STATE_S4);

	/* reset firmware waking vector */
	acpi_set_firmware_waking_vector((acpi_physical_address) 0);

	acpi_target_sleep_state = ACPI_STATE_S0;
}

static void acpi_hibernation_end(void)
{
	/*
	 * This is necessary in case acpi_hibernation_finish() is not called
	 * during a failing transition to the sleep state.
	 */
	acpi_target_sleep_state = ACPI_STATE_S0;
}

static int acpi_hibernation_pre_restore(void)
{
	acpi_status status;

	status = acpi_hw_disable_all_gpes();

	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
}

static void acpi_hibernation_restore_cleanup(void)
{
	acpi_hw_enable_all_runtime_gpes();
}

static struct platform_hibernation_ops acpi_hibernation_ops = {
	.begin = acpi_hibernation_begin,
	.end = acpi_hibernation_end,
	.pre_snapshot = acpi_hibernation_prepare,
	.finish = acpi_hibernation_finish,
	.prepare = acpi_hibernation_prepare,
	.enter = acpi_hibernation_enter,
	.leave = acpi_hibernation_leave,
	.pre_restore = acpi_hibernation_pre_restore,
	.restore_cleanup = acpi_hibernation_restore_cleanup,
};
#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_SLEEP
/**
 *	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
 *	@wake: if set, the device 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 wake, 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;

	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 ||
	    (wake && adev->wakeup.state.enabled &&
	     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)) {
			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

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)
{
	/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
	printk("%s called\n", __func__);
	local_irq_disable();
	acpi_enable_wakeup_device(ACPI_STATE_S5);
	acpi_enter_sleep_state(ACPI_STATE_S5);
}

int __init acpi_sleep_init(void)
{
	acpi_status status;
	u8 type_a, type_b;
#ifdef CONFIG_SUSPEND
	int i = 0;

	dmi_check_system(acpisleep_dmi_table);
#endif

	if (acpi_disabled)
		return 0;

	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(&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(&acpi_hibernation_ops);
		sleep_states[ACPI_STATE_S4] = 1;
		printk(" S4");
	}
#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");
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sleep.c - ACPI sleep support.
	3	*
e2a5b420	4	* Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
1da177e4 LT	5	* Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
	6	* Copyright (c) 2000-2003 Patrick Mochel
	7	* Copyright (c) 2003 Open Source Development Lab
	8	*
	9	* This file is released under the GPLv2.
	10	*
	11	*/
	12
	13	#include <linux/delay.h>
	14	#include <linux/irq.h>
	15	#include <linux/dmi.h>
	16	#include <linux/device.h>
	17	#include <linux/suspend.h>
f216cc37 AS	18
	19	#include <asm/io.h>
	20
1da177e4 LT	21	#include <acpi/acpi_bus.h>
	22	#include <acpi/acpi_drivers.h>
	23	#include "sleep.h"
	24
	25	u8 sleep_states[ACPI_S_STATE_COUNT];
	26
853298bc	27	#ifdef CONFIG_PM_SLEEP
296699de	28	static u32 acpi_target_sleep_state = ACPI_STATE_S0;
853298bc	29	#endif
296699de	30
c9b6c8f6	31	static int acpi_sleep_prepare(u32 acpi_state)
2f3f2226 AS	32	{
	33	#ifdef CONFIG_ACPI_SLEEP
	34	/* do we have a wakeup address for S2 and S3? */
	35	if (acpi_state == ACPI_STATE_S3) {
	36	if (!acpi_wakeup_address) {
	37	return -EFAULT;
	38	}
4b4f7280 PA	39	acpi_set_firmware_waking_vector(
4b4f7280 PA	40	(acpi_physical_address)acpi_wakeup_address);
2f3f2226 AS	41
	42	}
	43	ACPI_FLUSH_CPU_CACHE();
	44	acpi_enable_wakeup_device_prep(acpi_state);
	45	#endif
c9b6c8f6 RW	46	printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
c9b6c8f6 RW	47	acpi_state);
2f3f2226 AS	48	acpi_enter_sleep_state_prep(acpi_state);
	49	return 0;
	50	}
	51
296699de	52	#ifdef CONFIG_SUSPEND
2c6e33c3	53	static struct platform_suspend_ops acpi_suspend_ops;
1da177e4	54
1da177e4 LT	55	extern void do_suspend_lowlevel(void);
	56
	57	static u32 acpi_suspend_states[] = {
e2a5b420 AS	58	[PM_SUSPEND_ON] = ACPI_STATE_S0,
	59	[PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
	60	[PM_SUSPEND_MEM] = ACPI_STATE_S3,
e2a5b420	61	[PM_SUSPEND_MAX] = ACPI_STATE_S5
1da177e4 LT	62	};
	63
	64	static int init_8259A_after_S1;
	65
e9b3aba8	66	/**
2c6e33c3	67	* acpi_suspend_begin - Set the target system sleep state to the state
e9b3aba8 RW	68	* associated with given @pm_state, if supported.
	69	*/
	70
2c6e33c3	71	static int acpi_suspend_begin(suspend_state_t pm_state)
e9b3aba8 RW	72	{
	73	u32 acpi_state = acpi_suspend_states[pm_state];
	74	int error = 0;
	75
	76	if (sleep_states[acpi_state]) {
	77	acpi_target_sleep_state = acpi_state;
	78	} else {
	79	printk(KERN_ERR "ACPI does not support this state: %d\n",
	80	pm_state);
	81	error = -ENOSYS;
	82	}
	83	return error;
	84	}
	85
1da177e4	86	/**
2c6e33c3	87	* acpi_suspend_prepare - Do preliminary suspend work.
1da177e4	88	*
e9b3aba8 RW	89	* If necessary, set the firmware waking vector and do arch-specific
e9b3aba8 RW	90	* nastiness to get the wakeup code to the waking vector.
1da177e4 LT	91	*/
1da177e4 LT	92
2c6e33c3	93	static int acpi_suspend_prepare(void)
1da177e4	94	{
7731ce63	95	int error = acpi_sleep_prepare(acpi_target_sleep_state);
1da177e4	96
7731ce63 RW	97	if (error) {
	98	acpi_target_sleep_state = ACPI_STATE_S0;
	99	return error;
60417f59	100	}
e9b3aba8	101
60417f59	102	return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
1da177e4 LT	103	}
1da177e4 LT	104
1da177e4	105	/**
2c6e33c3	106	* acpi_suspend_enter - Actually enter a sleep state.
e9b3aba8	107	* @pm_state: ignored
1da177e4	108	*
50ad147a RW	109	* Flush caches and go to sleep. For STR we have to call arch-specific
50ad147a RW	110	* assembly, which in turn call acpi_enter_sleep_state().
1da177e4 LT	111	* It's unfortunate, but it works. Please fix if you're feeling frisky.
	112	*/
	113
2c6e33c3	114	static int acpi_suspend_enter(suspend_state_t pm_state)
1da177e4 LT	115	{
	116	acpi_status status = AE_OK;
	117	unsigned long flags = 0;
e9b3aba8	118	u32 acpi_state = acpi_target_sleep_state;
1da177e4 LT	119
	120	ACPI_FLUSH_CPU_CACHE();
	121
	122	/* Do arch specific saving of state. */
50ad147a	123	if (acpi_state == ACPI_STATE_S3) {
1da177e4	124	int error = acpi_save_state_mem();
e9b3aba8	125
60417f59	126	if (error)
1da177e4 LT	127	return error;
	128	}
	129
1da177e4 LT	130	local_irq_save(flags);
1da177e4 LT	131	acpi_enable_wakeup_device(acpi_state);
e9b3aba8 RW	132	switch (acpi_state) {
e9b3aba8 RW	133	case ACPI_STATE_S1:
1da177e4 LT	134	barrier();
	135	status = acpi_enter_sleep_state(acpi_state);
	136	break;
	137
e9b3aba8	138	case ACPI_STATE_S3:
1da177e4 LT	139	do_suspend_lowlevel();
1da177e4 LT	140	break;
1da177e4	141	}
872d83d0	142
c95d47a8 RW	143	/* Reprogram control registers and execute _BFS */
	144	acpi_leave_sleep_state_prep(acpi_state);
	145
23b168d4	146	/* ACPI 3.0 specs (P62) says that it's the responsibility
872d83d0 AP	147	* of the OSPM to clear the status bit [ implying that the
	148	* POWER_BUTTON event should not reach userspace ]
	149	*/
	150	if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3))
	151	acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
	152
a3627f67 SL	153	/*
	154	* Disable and clear GPE status before interrupt is enabled. Some GPEs
	155	* (like wakeup GPE) haven't handler, this can avoid such GPE misfire.
	156	* acpi_leave_sleep_state will reenable specific GPEs later
	157	*/
	158	acpi_hw_disable_all_gpes();
	159
1da177e4 LT	160	local_irq_restore(flags);
	161	printk(KERN_DEBUG "Back to C!\n");
	162
e9b3aba8	163	/* restore processor state */
50ad147a	164	if (acpi_state == ACPI_STATE_S3)
1da177e4 LT	165	acpi_restore_state_mem();
1da177e4 LT	166
1da177e4 LT	167	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
	168	}
	169
1da177e4	170	/**
2c6e33c3	171	* acpi_suspend_finish - Instruct the platform to leave a sleep state.
1da177e4 LT	172	*
	173	* This is called after we wake back up (or if entering the sleep state
	174	* failed).
	175	*/
	176
2c6e33c3	177	static void acpi_suspend_finish(void)
1da177e4	178	{
e9b3aba8	179	u32 acpi_state = acpi_target_sleep_state;
1da177e4	180
1da177e4	181	acpi_disable_wakeup_device(acpi_state);
1dbc1fda	182	acpi_leave_sleep_state(acpi_state);
1da177e4 LT	183
	184	/* reset firmware waking vector */
	185	acpi_set_firmware_waking_vector((acpi_physical_address) 0);
	186
e9b3aba8 RW	187	acpi_target_sleep_state = ACPI_STATE_S0;
e9b3aba8 RW	188
e8b2fd01	189	#ifdef CONFIG_X86
1da177e4 LT	190	if (init_8259A_after_S1) {
	191	printk("Broken toshiba laptop -> kicking interrupts\n");
	192	init_8259A(0);
	193	}
e8b2fd01	194	#endif
1da177e4 LT	195	}
1da177e4 LT	196
c697eece	197	/**
2c6e33c3	198	* acpi_suspend_end - Finish up suspend sequence.
c697eece RW	199	*/
c697eece RW	200
2c6e33c3	201	static void acpi_suspend_end(void)
c697eece RW	202	{
c697eece RW	203	/*
2c6e33c3	204	* This is necessary in case acpi_suspend_finish() is not called during a
7731ce63	205	* failing transition to a sleep state.
c697eece	206	*/
7731ce63	207	acpi_target_sleep_state = ACPI_STATE_S0;
c697eece RW	208	}
c697eece RW	209
2c6e33c3	210	static int acpi_suspend_state_valid(suspend_state_t pm_state)
eb9289eb	211	{
e8c9c502	212	u32 acpi_state;
eb9289eb	213
e8c9c502 JB	214	switch (pm_state) {
	215	case PM_SUSPEND_ON:
	216	case PM_SUSPEND_STANDBY:
	217	case PM_SUSPEND_MEM:
	218	acpi_state = acpi_suspend_states[pm_state];
	219
	220	return sleep_states[acpi_state];
	221	default:
	222	return 0;
	223	}
eb9289eb SL	224	}
eb9289eb SL	225
2c6e33c3 LB	226	static struct platform_suspend_ops acpi_suspend_ops = {
	227	.valid = acpi_suspend_state_valid,
	228	.begin = acpi_suspend_begin,
	229	.prepare = acpi_suspend_prepare,
	230	.enter = acpi_suspend_enter,
	231	.finish = acpi_suspend_finish,
	232	.end = acpi_suspend_end,
1da177e4 LT	233	};
1da177e4 LT	234
296699de RW	235	/*
	236	* Toshiba fails to preserve interrupts over S1, reinitialization
	237	* of 8259 is needed after S1 resume.
	238	*/
1855256c	239	static int __init init_ints_after_s1(const struct dmi_system_id *d)
296699de RW	240	{
	241	printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
	242	init_8259A_after_S1 = 1;
	243	return 0;
	244	}
	245
	246	static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
	247	{
	248	.callback = init_ints_after_s1,
	249	.ident = "Toshiba Satellite 4030cdt",
	250	.matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),},
	251	},
	252	{},
	253	};
	254	#endif /* CONFIG_SUSPEND */
	255
b0cb1a19	256	#ifdef CONFIG_HIBERNATION
caea99ef	257	static int acpi_hibernation_begin(void)
74f270af RW	258	{
74f270af RW	259	acpi_target_sleep_state = ACPI_STATE_S4;
7258ec5d	260
7731ce63	261	return 0;
74f270af RW	262	}
74f270af RW	263
a3d25c27 RW	264	static int acpi_hibernation_prepare(void)
a3d25c27 RW	265	{
7731ce63	266	int error = acpi_sleep_prepare(ACPI_STATE_S4);
3c1d2b60	267
7731ce63 RW	268	if (error) {
	269	acpi_target_sleep_state = ACPI_STATE_S0;
	270	return error;
7258ec5d	271	}
3c1d2b60	272
7258ec5d	273	return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
a3d25c27 RW	274	}
	275
	276	static int acpi_hibernation_enter(void)
	277	{
	278	acpi_status status = AE_OK;
	279	unsigned long flags = 0;
	280
	281	ACPI_FLUSH_CPU_CACHE();
	282
	283	local_irq_save(flags);
	284	acpi_enable_wakeup_device(ACPI_STATE_S4);
	285	/* This shouldn't return. If it returns, we have a problem */
	286	status = acpi_enter_sleep_state(ACPI_STATE_S4);
c95d47a8 RW	287	/* Reprogram control registers and execute _BFS */
c95d47a8 RW	288	acpi_leave_sleep_state_prep(ACPI_STATE_S4);
a3d25c27 RW	289	local_irq_restore(flags);
	290
	291	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
	292	}
	293
c7e0831d RW	294	static void acpi_hibernation_leave(void)
	295	{
	296	/*
	297	* If ACPI is not enabled by the BIOS and the boot kernel, we need to
	298	* enable it here.
	299	*/
	300	acpi_enable();
c95d47a8 RW	301	/* Reprogram control registers and execute _BFS */
c95d47a8 RW	302	acpi_leave_sleep_state_prep(ACPI_STATE_S4);
c7e0831d RW	303	}
c7e0831d RW	304
a3d25c27 RW	305	static void acpi_hibernation_finish(void)
a3d25c27 RW	306	{
a3d25c27	307	acpi_disable_wakeup_device(ACPI_STATE_S4);
1dbc1fda	308	acpi_leave_sleep_state(ACPI_STATE_S4);
a3d25c27 RW	309
	310	/* reset firmware waking vector */
	311	acpi_set_firmware_waking_vector((acpi_physical_address) 0);
74f270af RW	312
74f270af RW	313	acpi_target_sleep_state = ACPI_STATE_S0;
a3d25c27 RW	314	}
a3d25c27 RW	315
caea99ef RW	316	static void acpi_hibernation_end(void)
	317	{
	318	/*
	319	* This is necessary in case acpi_hibernation_finish() is not called
7731ce63	320	* during a failing transition to the sleep state.
caea99ef	321	*/
7731ce63	322	acpi_target_sleep_state = ACPI_STATE_S0;
caea99ef RW	323	}
caea99ef RW	324
a634cc10 RW	325	static int acpi_hibernation_pre_restore(void)
	326	{
	327	acpi_status status;
	328
	329	status = acpi_hw_disable_all_gpes();
	330
	331	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
	332	}
	333
	334	static void acpi_hibernation_restore_cleanup(void)
	335	{
	336	acpi_hw_enable_all_runtime_gpes();
	337	}
	338
b3dac3b3	339	static struct platform_hibernation_ops acpi_hibernation_ops = {
caea99ef RW	340	.begin = acpi_hibernation_begin,
caea99ef RW	341	.end = acpi_hibernation_end,
74f270af RW	342	.pre_snapshot = acpi_hibernation_prepare,
74f270af RW	343	.finish = acpi_hibernation_finish,
a3d25c27 RW	344	.prepare = acpi_hibernation_prepare,
a3d25c27 RW	345	.enter = acpi_hibernation_enter,
c7e0831d	346	.leave = acpi_hibernation_leave,
a634cc10 RW	347	.pre_restore = acpi_hibernation_pre_restore,
a634cc10 RW	348	.restore_cleanup = acpi_hibernation_restore_cleanup,
a3d25c27	349	};
b0cb1a19	350	#endif /* CONFIG_HIBERNATION */
a3d25c27	351
296699de RW	352	int acpi_suspend(u32 acpi_state)
	353	{
	354	suspend_state_t states[] = {
	355	[1] = PM_SUSPEND_STANDBY,
	356	[3] = PM_SUSPEND_MEM,
	357	[5] = PM_SUSPEND_MAX
	358	};
	359
	360	if (acpi_state < 6 && states[acpi_state])
	361	return pm_suspend(states[acpi_state]);
	362	if (acpi_state == 4)
	363	return hibernate();
	364	return -EINVAL;
	365	}
	366
853298bc	367	#ifdef CONFIG_PM_SLEEP
fd4aff1a SL	368	/**
	369	* acpi_pm_device_sleep_state - return preferred power state of ACPI device
	370	* in the system sleep state given by %acpi_target_sleep_state
	371	* @dev: device to examine
	372	* @wake: if set, the device should be able to wake up the system
	373	* @d_min_p: used to store the upper limit of allowed states range
	374	* Return value: preferred power state of the device on success, -ENODEV on
	375	* failure (ie. if there's no 'struct acpi_device' for @dev)
	376	*
	377	* Find the lowest power (highest number) ACPI device power state that
	378	* device @dev can be in while the system is in the sleep state represented
	379	* by %acpi_target_sleep_state. If @wake is nonzero, the device should be
	380	* able to wake up the system from this sleep state. If @d_min_p is set,
	381	* the highest power (lowest number) device power state of @dev allowed
	382	* in this system sleep state is stored at the location pointed to by it.
	383	*
	384	* The caller must ensure that @dev is valid before using this function.
	385	* The caller is also responsible for figuring out if the device is
	386	* supposed to be able to wake up the system and passing this information
	387	* via @wake.
	388	*/
	389
	390	int acpi_pm_device_sleep_state(struct device dev, int wake, int d_min_p)
	391	{
	392	acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
	393	struct acpi_device *adev;
	394	char acpi_method[] = "_SxD";
	395	unsigned long d_min, d_max;
	396
	397	if (!handle \|\| ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
ead77594	398	printk(KERN_DEBUG "ACPI handle has no context!\n");
fd4aff1a SL	399	return -ENODEV;
	400	}
	401
	402	acpi_method[2] = '0' + acpi_target_sleep_state;
	403	/*
	404	* If the sleep state is S0, we will return D3, but if the device has
	405	* _S0W, we will use the value from _S0W
	406	*/
	407	d_min = ACPI_STATE_D0;
	408	d_max = ACPI_STATE_D3;
	409
	410	/*
	411	* If present, _SxD methods return the minimum D-state (highest power
	412	* state) we can use for the corresponding S-states. Otherwise, the
	413	* minimum D-state is D0 (ACPI 3.x).
	414	*
	415	* NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
	416	* provided -- that's our fault recovery, we ignore retval.
	417	*/
	418	if (acpi_target_sleep_state > ACPI_STATE_S0)
	419	acpi_evaluate_integer(handle, acpi_method, NULL, &d_min);
	420
	421	/*
	422	* If _PRW says we can wake up the system from the target sleep state,
	423	* the D-state returned by _SxD is sufficient for that (we assume a
	424	* wakeup-aware driver if wake is set). Still, if _SxW exists
	425	* (ACPI 3.x), it should return the maximum (lowest power) D-state that
	426	* can wake the system. _S0W may be valid, too.
	427	*/
	428	if (acpi_target_sleep_state == ACPI_STATE_S0 \|\|
	429	(wake && adev->wakeup.state.enabled &&
	430	adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
ad3399c3 RW	431	acpi_status status;
ad3399c3 RW	432
fd4aff1a	433	acpi_method[3] = 'W';
ad3399c3 RW	434	status = acpi_evaluate_integer(handle, acpi_method, NULL,
	435	&d_max);
	436	if (ACPI_FAILURE(status)) {
	437	d_max = d_min;
	438	} else if (d_max < d_min) {
	439	/* Warn the user of the broken DSDT */
	440	printk(KERN_WARNING "ACPI: Wrong value from %s\n",
	441	acpi_method);
	442	/* Sanitize it */
fd4aff1a	443	d_min = d_max;
ad3399c3	444	}
fd4aff1a SL	445	}
	446
	447	if (d_min_p)
	448	*d_min_p = d_min;
	449	return d_max;
	450	}
853298bc	451	#endif
fd4aff1a	452
f216cc37 AS	453	static void acpi_power_off_prepare(void)
	454	{
	455	/* Prepare to power off the system */
	456	acpi_sleep_prepare(ACPI_STATE_S5);
3c1d2b60	457	acpi_hw_disable_all_gpes();
f216cc37 AS	458	}
	459
	460	static void acpi_power_off(void)
	461	{
	462	/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
96b2dd1f	463	printk("%s called\n", __func__);
f216cc37	464	local_irq_disable();
9c1c6a1b	465	acpi_enable_wakeup_device(ACPI_STATE_S5);
f216cc37 AS	466	acpi_enter_sleep_state(ACPI_STATE_S5);
	467	}
	468
aafbcd16	469	int __init acpi_sleep_init(void)
1da177e4	470	{
296699de RW	471	acpi_status status;
	472	u8 type_a, type_b;
	473	#ifdef CONFIG_SUSPEND
e2a5b420	474	int i = 0;
1da177e4 LT	475
1da177e4 LT	476	dmi_check_system(acpisleep_dmi_table);
296699de	477	#endif
1da177e4 LT	478
	479	if (acpi_disabled)
	480	return 0;
	481
5a50fe70 FP	482	sleep_states[ACPI_STATE_S0] = 1;
	483	printk(KERN_INFO PREFIX "(supports S0");
	484
296699de	485	#ifdef CONFIG_SUSPEND
5a50fe70	486	for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) {
1da177e4 LT	487	status = acpi_get_sleep_type_data(i, &type_a, &type_b);
	488	if (ACPI_SUCCESS(status)) {
	489	sleep_states[i] = 1;
	490	printk(" S%d", i);
	491	}
1da177e4	492	}
1da177e4	493
2c6e33c3	494	suspend_set_ops(&acpi_suspend_ops);
296699de	495	#endif
a3d25c27	496
b0cb1a19	497	#ifdef CONFIG_HIBERNATION
296699de RW	498	status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
296699de RW	499	if (ACPI_SUCCESS(status)) {
a3d25c27	500	hibernation_set_ops(&acpi_hibernation_ops);
296699de	501	sleep_states[ACPI_STATE_S4] = 1;
f216cc37	502	printk(" S4");
296699de	503	}
a3d25c27	504	#endif
f216cc37 AS	505	status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
	506	if (ACPI_SUCCESS(status)) {
	507	sleep_states[ACPI_STATE_S5] = 1;
	508	printk(" S5");
	509	pm_power_off_prepare = acpi_power_off_prepare;
	510	pm_power_off = acpi_power_off;
	511	}
	512	printk(")\n");
1da177e4 LT	513	return 0;
1da177e4 LT	514	}