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linux/drivers/acpi/hardware/hwsleep.c
Robert Moore 73459f73e5 ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> 
ACPICA 20050617:

Moved the object cache operations into the OS interface
layer (OSL) to allow the host OS to handle these operations
if desired (for example, the Linux OSL will invoke the
slab allocator).  This support is optional; the compile
time define ACPI_USE_LOCAL_CACHE may be used to utilize
the original cache code in the ACPI CA core.  The new OSL
interfaces are shown below.  See utalloc.c for an example
implementation, and acpiosxf.h for the exact interface
definitions.  Thanks to Alexey Starikovskiy.
	acpi_os_create_cache
	acpi_os_delete_cache
	acpi_os_purge_cache
	acpi_os_acquire_object
	acpi_os_release_object

Modified the interfaces to acpi_os_acquire_lock and
acpi_os_release_lock to return and restore a flags
parameter.  This fits better with many OS lock models.
Note: the current execution state (interrupt handler
or not) is no longer passed to these interfaces.  If
necessary, the OSL must determine this state by itself, a
simple and fast operation.  Thanks to Alexey Starikovskiy.

Fixed a problem in the ACPI table handling where a valid
XSDT was assumed present if the revision of the RSDP
was 2 or greater.  According to the ACPI specification,
the XSDT is optional in all cases, and the table manager
therefore now checks for both an RSDP >=2 and a valid
XSDT pointer.  Otherwise, the RSDT pointer is used.
Some ACPI 2.0 compliant BIOSs contain only the RSDT.

Fixed an interpreter problem with the Mid() operator in the
case of an input string where the resulting output string
is of zero length.  It now correctly returns a valid,
null terminated string object instead of a string object
with a null pointer.

Fixed a problem with the control method argument handling
to allow a store to an Arg object that already contains an
object of type Device.  The Device object is now correctly
overwritten.  Previously, an error was returned.

ACPICA 20050624:

Modified the new OSL cache interfaces to use ACPI_CACHE_T
as the type for the host-defined cache object.  This allows
the OSL implementation to define and type this object in
any manner desired, simplifying the OSL implementation.
For example, ACPI_CACHE_T is defined as kmem_cache_t for
Linux, and should be defined in the OS-specific header
file for other operating systems as required.

Changed the interface to AcpiOsAcquireObject to directly
return the requested object as the function return (instead
of ACPI_STATUS.) This change was made for performance
reasons, since this is the purpose of the interface in the
first place.  acpi_os_acquire_object is now similar to the
acpi_os_allocate interface.  Thanks to Alexey Starikovskiy.

Modified the initialization sequence in
acpi_initialize_subsystem to call the OSL interface
acpi_osl_initialize first, before any local initialization.
This change was required because the global initialization
now calls OSL interfaces.

Restructured the code base to split some files because
of size and/or because the code logically belonged in a
separate file.  New files are listed below.

  utilities/utcache.c	/* Local cache interfaces */
  utilities/utmutex.c	/* Local mutex support */
  utilities/utstate.c	/* State object support */
  parser/psloop.c	/* Main AML parse loop */

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-13 23:45:36 -04:00

589 lines
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/******************************************************************************
*
* Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <linux/module.h>
#include <acpi/acpi.h>
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME ("hwsleep")
/*******************************************************************************
*
* FUNCTION: acpi_set_firmware_waking_vector
*
* PARAMETERS: physical_address - Physical address of ACPI real mode
* entry point.
*
* RETURN: Status
*
* DESCRIPTION: Access function for the firmware_waking_vector field in FACS
*
******************************************************************************/
acpi_status
acpi_set_firmware_waking_vector (
acpi_physical_address physical_address)
{
ACPI_FUNCTION_TRACE ("acpi_set_firmware_waking_vector");
/* Set the vector */
if (acpi_gbl_common_fACS.vector_width == 32) {
*(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector))
= (u32) physical_address;
}
else {
*acpi_gbl_common_fACS.firmware_waking_vector
= physical_address;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_get_firmware_waking_vector
*
* PARAMETERS: *physical_address - Where the contents of
* the firmware_waking_vector field of
* the FACS will be returned.
*
* RETURN: Status, vector
*
* DESCRIPTION: Access function for the firmware_waking_vector field in FACS
*
******************************************************************************/
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_get_firmware_waking_vector (
acpi_physical_address *physical_address)
{
ACPI_FUNCTION_TRACE ("acpi_get_firmware_waking_vector");
if (!physical_address) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the vector */
if (acpi_gbl_common_fACS.vector_width == 32) {
*physical_address = (acpi_physical_address)
*(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector));
}
else {
*physical_address =
*acpi_gbl_common_fACS.firmware_waking_vector;
}
return_ACPI_STATUS (AE_OK);
}
#endif
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state_prep
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
* This function must execute with interrupts enabled.
* We break sleeping into 2 stages so that OSPM can handle
* various OS-specific tasks between the two steps.
*
******************************************************************************/
acpi_status
acpi_enter_sleep_state_prep (
u8 sleep_state)
{
acpi_status status;
struct acpi_object_list arg_list;
union acpi_object arg;
ACPI_FUNCTION_TRACE ("acpi_enter_sleep_state_prep");
/*
* _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
*/
status = acpi_get_sleep_type_data (sleep_state,
&acpi_gbl_sleep_type_a, &acpi_gbl_sleep_type_b);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Setup parameter object */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
/* Run the _PTS and _GTS methods */
status = acpi_evaluate_object (NULL, METHOD_NAME__PTS, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS (status);
}
status = acpi_evaluate_object (NULL, METHOD_NAME__GTS, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS (status);
}
/* Setup the argument to _SST */
switch (sleep_state) {
case ACPI_STATE_S0:
arg.integer.value = ACPI_SST_WORKING;
break;
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
arg.integer.value = ACPI_SST_SLEEPING;
break;
case ACPI_STATE_S4:
arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
break;
default:
arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */
break;
}
/* Set the system indicators to show the desired sleep state. */
status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
ACPI_REPORT_ERROR (("Method _SST failed, %s\n",
acpi_format_exception (status)));
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status asmlinkage
acpi_enter_sleep_state (
u8 sleep_state)
{
u32 PM1Acontrol;
u32 PM1Bcontrol;
struct acpi_bit_register_info *sleep_type_reg_info;
struct acpi_bit_register_info *sleep_enable_reg_info;
u32 in_value;
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_enter_sleep_state");
if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
(acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
ACPI_REPORT_ERROR (("Sleep values out of range: A=%X B=%X\n",
acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
sleep_type_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A);
sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE);
/* Clear wake status */
status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Clear all fixed and general purpose status bits */
status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* 1) Disable/Clear all GPEs
* 2) Enable all wakeup GPEs
*/
status = acpi_hw_disable_all_gpes ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
acpi_gbl_system_awake_and_running = FALSE;
status = acpi_hw_enable_all_wakeup_gpes ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Get current value of PM1A control */
status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Entering sleep state [S%d]\n", sleep_state));
/* Clear SLP_EN and SLP_TYP fields */
PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
sleep_enable_reg_info->access_bit_mask);
PM1Bcontrol = PM1Acontrol;
/* Insert SLP_TYP bits */
PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
/*
* We split the writes of SLP_TYP and SLP_EN to workaround
* poorly implemented hardware.
*/
/* Write #1: fill in SLP_TYP data */
status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Insert SLP_ENABLE bit */
PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
/* Write #2: SLP_TYP + SLP_EN */
ACPI_FLUSH_CPU_CACHE ();
status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
if (sleep_state > ACPI_STATE_S3) {
/*
* We wanted to sleep > S3, but it didn't happen (by virtue of the
* fact that we are still executing!)
*
* Wait ten seconds, then try again. This is to get S4/S5 to work on
* all machines.
*
* We wait so long to allow chipsets that poll this reg very slowly to
* still read the right value. Ideally, this block would go
* away entirely.
*/
acpi_os_stall (10000000);
status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_CONTROL,
sleep_enable_reg_info->access_bit_mask);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Wait until we enter sleep state */
do {
status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value,
ACPI_MTX_DO_NOT_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Spin until we wake */
} while (!in_value);
return_ACPI_STATUS (AE_OK);
}
EXPORT_SYMBOL(acpi_enter_sleep_state);
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state_s4bios
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Perform a S4 bios request.
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status asmlinkage
acpi_enter_sleep_state_s4bios (
void)
{
u32 in_value;
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_enter_sleep_state_s4bios");
status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* 1) Disable/Clear all GPEs
* 2) Enable all wakeup GPEs
*/
status = acpi_hw_disable_all_gpes ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
acpi_gbl_system_awake_and_running = FALSE;
status = acpi_hw_enable_all_wakeup_gpes ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_FLUSH_CPU_CACHE ();
status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd,
(u32) acpi_gbl_FADT->S4bios_req, 8);
do {
acpi_os_stall(1000);
status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value,
ACPI_MTX_DO_NOT_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
} while (!in_value);
return_ACPI_STATUS (AE_OK);
}
EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios);
/*******************************************************************************
*
* FUNCTION: acpi_leave_sleep_state
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: Status
*
* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
* Called with interrupts ENABLED.
*
******************************************************************************/
acpi_status
acpi_leave_sleep_state (
u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
struct acpi_bit_register_info *sleep_type_reg_info;
struct acpi_bit_register_info *sleep_enable_reg_info;
u32 PM1Acontrol;
u32 PM1Bcontrol;
ACPI_FUNCTION_TRACE ("acpi_leave_sleep_state");
/*
* Set SLP_TYPE and SLP_EN to state S0.
* This is unclear from the ACPI Spec, but it is required
* by some machines.
*/
status = acpi_get_sleep_type_data (ACPI_STATE_S0,
&acpi_gbl_sleep_type_a, &acpi_gbl_sleep_type_b);
if (ACPI_SUCCESS (status)) {
sleep_type_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A);
sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE);
/* Get current value of PM1A control */
status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
if (ACPI_SUCCESS (status)) {
/* Clear SLP_EN and SLP_TYP fields */
PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
sleep_enable_reg_info->access_bit_mask);
PM1Bcontrol = PM1Acontrol;
/* Insert SLP_TYP bits */
PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
/* Just ignore any errors */
(void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
(void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
}
}
/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
/* Setup parameter object */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
/* Ignore any errors from these methods */
arg.integer.value = ACPI_SST_WAKING;
status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
ACPI_REPORT_ERROR (("Method _SST failed, %s\n",
acpi_format_exception (status)));
}
arg.integer.value = sleep_state;
status = acpi_evaluate_object (NULL, METHOD_NAME__BFS, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
ACPI_REPORT_ERROR (("Method _BFS failed, %s\n",
acpi_format_exception (status)));
}
status = acpi_evaluate_object (NULL, METHOD_NAME__WAK, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
ACPI_REPORT_ERROR (("Method _WAK failed, %s\n",
acpi_format_exception (status)));
}
/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
/*
* Restore the GPEs:
* 1) Disable/Clear all GPEs
* 2) Enable all runtime GPEs
*/
status = acpi_hw_disable_all_gpes ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
acpi_gbl_system_awake_and_running = TRUE;
status = acpi_hw_enable_all_runtime_gpes ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Enable power button */
(void) acpi_set_register(
acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].enable_register_id,
1, ACPI_MTX_DO_NOT_LOCK);
(void) acpi_set_register(
acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].status_register_id,
1, ACPI_MTX_DO_NOT_LOCK);
arg.integer.value = ACPI_SST_WORKING;
status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
ACPI_REPORT_ERROR (("Method _SST failed, %s\n",
acpi_format_exception (status)));
}
return_ACPI_STATUS (status);
}
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