diff options
Diffstat (limited to 'drivers/acpi/hardware')
| -rw-r--r-- | drivers/acpi/hardware/Makefile | 9 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwacpi.c | 184 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwgpe.c | 477 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwregs.c | 857 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwsleep.c | 643 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwtimer.c | 187 |
6 files changed, 0 insertions, 2357 deletions
diff --git a/drivers/acpi/hardware/Makefile b/drivers/acpi/hardware/Makefile deleted file mode 100644 index 438ad373b9a..00000000000 --- a/drivers/acpi/hardware/Makefile +++ /dev/null @@ -1,9 +0,0 @@ -# -# Makefile for all Linux ACPI interpreter subdirectories -# - -obj-y := hwacpi.o hwgpe.o hwregs.o hwsleep.o - -obj-$(ACPI_FUTURE_USAGE) += hwtimer.o - -EXTRA_CFLAGS += $(ACPI_CFLAGS) diff --git a/drivers/acpi/hardware/hwacpi.c b/drivers/acpi/hardware/hwacpi.c deleted file mode 100644 index 816894ea839..00000000000 --- a/drivers/acpi/hardware/hwacpi.c +++ /dev/null @@ -1,184 +0,0 @@ - -/****************************************************************************** - * - * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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 <acpi/acpi.h> - -#define _COMPONENT ACPI_HARDWARE -ACPI_MODULE_NAME("hwacpi") - -/****************************************************************************** - * - * FUNCTION: acpi_hw_set_mode - * - * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY - * - * RETURN: Status - * - * DESCRIPTION: Transitions the system into the requested mode. - * - ******************************************************************************/ -acpi_status acpi_hw_set_mode(u32 mode) -{ - - acpi_status status; - u32 retry; - - ACPI_FUNCTION_TRACE(hw_set_mode); - - /* - * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, - * system does not support mode transition. - */ - if (!acpi_gbl_FADT.smi_command) { - ACPI_ERROR((AE_INFO, - "No SMI_CMD in FADT, mode transition failed")); - return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); - } - - /* - * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE - * in FADT: If it is zero, enabling or disabling is not supported. - * As old systems may have used zero for mode transition, - * we make sure both the numbers are zero to determine these - * transitions are not supported. - */ - if (!acpi_gbl_FADT.acpi_enable && !acpi_gbl_FADT.acpi_disable) { - ACPI_ERROR((AE_INFO, - "No ACPI mode transition supported in this system (enable/disable both zero)")); - return_ACPI_STATUS(AE_OK); - } - - switch (mode) { - case ACPI_SYS_MODE_ACPI: - - /* BIOS should have disabled ALL fixed and GP events */ - - status = acpi_os_write_port(acpi_gbl_FADT.smi_command, - (u32) acpi_gbl_FADT.acpi_enable, 8); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Attempting to enable ACPI mode\n")); - break; - - case ACPI_SYS_MODE_LEGACY: - - /* - * BIOS should clear all fixed status bits and restore fixed event - * enable bits to default - */ - status = acpi_os_write_port(acpi_gbl_FADT.smi_command, - (u32) acpi_gbl_FADT.acpi_disable, - 8); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Attempting to enable Legacy (non-ACPI) mode\n")); - break; - - default: - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Could not write ACPI mode change")); - return_ACPI_STATUS(status); - } - - /* - * Some hardware takes a LONG time to switch modes. Give them 3 sec to - * do so, but allow faster systems to proceed more quickly. - */ - retry = 3000; - while (retry) { - if (acpi_hw_get_mode() == mode) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Mode %X successfully enabled\n", - mode)); - return_ACPI_STATUS(AE_OK); - } - acpi_os_stall(1000); - retry--; - } - - ACPI_ERROR((AE_INFO, "Hardware did not change modes")); - return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); -} - -/******************************************************************************* - * - * FUNCTION: acpi_hw_get_mode - * - * PARAMETERS: none - * - * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY - * - * DESCRIPTION: Return current operating state of system. Determined by - * querying the SCI_EN bit. - * - ******************************************************************************/ - -u32 acpi_hw_get_mode(void) -{ - acpi_status status; - u32 value; - - ACPI_FUNCTION_TRACE(hw_get_mode); - - /* - * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, - * system does not support mode transition. - */ - if (!acpi_gbl_FADT.smi_command) { - return_UINT32(ACPI_SYS_MODE_ACPI); - } - - status = acpi_get_register(ACPI_BITREG_SCI_ENABLE, &value); - if (ACPI_FAILURE(status)) { - return_UINT32(ACPI_SYS_MODE_LEGACY); - } - - if (value) { - return_UINT32(ACPI_SYS_MODE_ACPI); - } else { - return_UINT32(ACPI_SYS_MODE_LEGACY); - } -} diff --git a/drivers/acpi/hardware/hwgpe.c b/drivers/acpi/hardware/hwgpe.c deleted file mode 100644 index 0b80db9d919..00000000000 --- a/drivers/acpi/hardware/hwgpe.c +++ /dev/null @@ -1,477 +0,0 @@ - -/****************************************************************************** - * - * Module Name: hwgpe - Low level GPE enable/disable/clear functions - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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 <acpi/acpi.h> -#include <acpi/acevents.h> - -#define _COMPONENT ACPI_HARDWARE -ACPI_MODULE_NAME("hwgpe") - -/* Local prototypes */ -static acpi_status -acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, - struct acpi_gpe_block_info *gpe_block); - -/****************************************************************************** - * - * FUNCTION: acpi_hw_low_disable_gpe - * - * PARAMETERS: gpe_event_info - Info block for the GPE to be disabled - * - * RETURN: Status - * - * DESCRIPTION: Disable a single GPE in the enable register. - * - ******************************************************************************/ - -acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info) -{ - struct acpi_gpe_register_info *gpe_register_info; - acpi_status status; - u32 enable_mask; - - /* Get the info block for the entire GPE register */ - - gpe_register_info = gpe_event_info->register_info; - if (!gpe_register_info) { - return (AE_NOT_EXIST); - } - - /* Get current value of the enable register that contains this GPE */ - - status = acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, &enable_mask, - &gpe_register_info->enable_address); - if (ACPI_FAILURE(status)) { - return (status); - } - - /* Clear just the bit that corresponds to this GPE */ - - ACPI_CLEAR_BIT(enable_mask, - ((u32) 1 << - (gpe_event_info->gpe_number - - gpe_register_info->base_gpe_number))); - - /* Write the updated enable mask */ - - status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, enable_mask, - &gpe_register_info->enable_address); - - return (status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_write_gpe_enable_reg - * - * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled - * - * RETURN: Status - * - * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must - * already be cleared or set in the parent register - * enable_for_run mask. - * - ******************************************************************************/ - -acpi_status -acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info) -{ - struct acpi_gpe_register_info *gpe_register_info; - acpi_status status; - - ACPI_FUNCTION_ENTRY(); - - /* Get the info block for the entire GPE register */ - - gpe_register_info = gpe_event_info->register_info; - if (!gpe_register_info) { - return (AE_NOT_EXIST); - } - - /* Write the entire GPE (runtime) enable register */ - - status = acpi_hw_low_level_write(8, gpe_register_info->enable_for_run, - &gpe_register_info->enable_address); - - return (status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_clear_gpe - * - * PARAMETERS: gpe_event_info - Info block for the GPE to be cleared - * - * RETURN: Status - * - * DESCRIPTION: Clear the status bit for a single GPE. - * - ******************************************************************************/ - -acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info) -{ - acpi_status status; - u8 register_bit; - - ACPI_FUNCTION_ENTRY(); - - register_bit = (u8) - (1 << - (gpe_event_info->gpe_number - - gpe_event_info->register_info->base_gpe_number)); - - /* - * Write a one to the appropriate bit in the status register to - * clear this GPE. - */ - status = acpi_hw_low_level_write(8, register_bit, - &gpe_event_info->register_info-> - status_address); - - return (status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_get_gpe_status - * - * PARAMETERS: gpe_event_info - Info block for the GPE to queried - * event_status - Where the GPE status is returned - * - * RETURN: Status - * - * DESCRIPTION: Return the status of a single GPE. - * - ******************************************************************************/ - -acpi_status -acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info, - acpi_event_status * event_status) -{ - u32 in_byte; - u8 register_bit; - struct acpi_gpe_register_info *gpe_register_info; - acpi_status status; - acpi_event_status local_event_status = 0; - - ACPI_FUNCTION_ENTRY(); - - if (!event_status) { - return (AE_BAD_PARAMETER); - } - - /* Get the info block for the entire GPE register */ - - gpe_register_info = gpe_event_info->register_info; - - /* Get the register bitmask for this GPE */ - - register_bit = (u8) - (1 << - (gpe_event_info->gpe_number - - gpe_event_info->register_info->base_gpe_number)); - - /* GPE currently enabled? (enabled for runtime?) */ - - if (register_bit & gpe_register_info->enable_for_run) { - local_event_status |= ACPI_EVENT_FLAG_ENABLED; - } - - /* GPE enabled for wake? */ - - if (register_bit & gpe_register_info->enable_for_wake) { - local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED; - } - - /* GPE currently active (status bit == 1)? */ - - status = - acpi_hw_low_level_read(8, &in_byte, - &gpe_register_info->status_address); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - if (register_bit & in_byte) { - local_event_status |= ACPI_EVENT_FLAG_SET; - } - - /* Set return value */ - - (*event_status) = local_event_status; - - unlock_and_exit: - return (status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_disable_gpe_block - * - * PARAMETERS: gpe_xrupt_info - GPE Interrupt info - * gpe_block - Gpe Block info - * - * RETURN: Status - * - * DESCRIPTION: Disable all GPEs within a single GPE block - * - ******************************************************************************/ - -acpi_status -acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info, - struct acpi_gpe_block_info * gpe_block) -{ - u32 i; - acpi_status status; - - /* Examine each GPE Register within the block */ - - for (i = 0; i < gpe_block->register_count; i++) { - - /* Disable all GPEs in this register */ - - status = acpi_hw_low_level_write(8, 0x00, - &gpe_block->register_info[i]. - enable_address); - if (ACPI_FAILURE(status)) { - return (status); - } - } - - return (AE_OK); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_clear_gpe_block - * - * PARAMETERS: gpe_xrupt_info - GPE Interrupt info - * gpe_block - Gpe Block info - * - * RETURN: Status - * - * DESCRIPTION: Clear status bits for all GPEs within a single GPE block - * - ******************************************************************************/ - -acpi_status -acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info, - struct acpi_gpe_block_info * gpe_block) -{ - u32 i; - acpi_status status; - - /* Examine each GPE Register within the block */ - - for (i = 0; i < gpe_block->register_count; i++) { - - /* Clear status on all GPEs in this register */ - - status = acpi_hw_low_level_write(8, 0xFF, - &gpe_block->register_info[i]. - status_address); - if (ACPI_FAILURE(status)) { - return (status); - } - } - - return (AE_OK); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_enable_runtime_gpe_block - * - * PARAMETERS: gpe_xrupt_info - GPE Interrupt info - * gpe_block - Gpe Block info - * - * RETURN: Status - * - * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes - * combination wake/run GPEs. - * - ******************************************************************************/ - -acpi_status -acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info, - struct acpi_gpe_block_info * gpe_block) -{ - u32 i; - acpi_status status; - - /* NOTE: assumes that all GPEs are currently disabled */ - - /* Examine each GPE Register within the block */ - - for (i = 0; i < gpe_block->register_count; i++) { - if (!gpe_block->register_info[i].enable_for_run) { - continue; - } - - /* Enable all "runtime" GPEs in this register */ - - status = - acpi_hw_low_level_write(8, - gpe_block->register_info[i]. - enable_for_run, - &gpe_block->register_info[i]. - enable_address); - if (ACPI_FAILURE(status)) { - return (status); - } - } - - return (AE_OK); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_enable_wakeup_gpe_block - * - * PARAMETERS: gpe_xrupt_info - GPE Interrupt info - * gpe_block - Gpe Block info - * - * RETURN: Status - * - * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes - * combination wake/run GPEs. - * - ******************************************************************************/ - -static acpi_status -acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, - struct acpi_gpe_block_info *gpe_block) -{ - u32 i; - acpi_status status; - - /* Examine each GPE Register within the block */ - - for (i = 0; i < gpe_block->register_count; i++) { - if (!gpe_block->register_info[i].enable_for_wake) { - continue; - } - - /* Enable all "wake" GPEs in this register */ - - status = acpi_hw_low_level_write(8, - gpe_block->register_info[i]. - enable_for_wake, - &gpe_block->register_info[i]. - enable_address); - if (ACPI_FAILURE(status)) { - return (status); - } - } - - return (AE_OK); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_disable_all_gpes - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Disable and clear all GPEs in all GPE blocks - * - ******************************************************************************/ - -acpi_status acpi_hw_disable_all_gpes(void) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(hw_disable_all_gpes); - - status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block); - status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block); - return_ACPI_STATUS(status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_enable_all_runtime_gpes - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks - * - ******************************************************************************/ - -acpi_status acpi_hw_enable_all_runtime_gpes(void) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes); - - status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block); - return_ACPI_STATUS(status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_enable_all_wakeup_gpes - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks - * - ******************************************************************************/ - -acpi_status acpi_hw_enable_all_wakeup_gpes(void) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes); - - status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block); - return_ACPI_STATUS(status); -} diff --git a/drivers/acpi/hardware/hwregs.c b/drivers/acpi/hardware/hwregs.c deleted file mode 100644 index ddf792adcf9..00000000000 --- a/drivers/acpi/hardware/hwregs.c +++ /dev/null @@ -1,857 +0,0 @@ - -/******************************************************************************* - * - * Module Name: hwregs - Read/write access functions for the various ACPI - * control and status registers. - * - ******************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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 <acpi/acpi.h> -#include <acpi/acnamesp.h> -#include <acpi/acevents.h> - -#define _COMPONENT ACPI_HARDWARE -ACPI_MODULE_NAME("hwregs") - -/******************************************************************************* - * - * FUNCTION: acpi_hw_clear_acpi_status - * - * PARAMETERS: None - * - * RETURN: None - * - * DESCRIPTION: Clears all fixed and general purpose status bits - * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED - * - ******************************************************************************/ -acpi_status acpi_hw_clear_acpi_status(void) -{ - acpi_status status; - acpi_cpu_flags lock_flags = 0; - - ACPI_FUNCTION_TRACE(hw_clear_acpi_status); - - ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %04X\n", - ACPI_BITMASK_ALL_FIXED_STATUS, - (u16) acpi_gbl_FADT.xpm1a_event_block.address)); - - lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); - - status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS, - ACPI_BITMASK_ALL_FIXED_STATUS); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - /* Clear the fixed events */ - - if (acpi_gbl_FADT.xpm1b_event_block.address) { - status = - acpi_hw_low_level_write(16, ACPI_BITMASK_ALL_FIXED_STATUS, - &acpi_gbl_FADT.xpm1b_event_block); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - } - - /* Clear the GPE Bits in all GPE registers in all GPE blocks */ - - status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block); - - unlock_and_exit: - acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_get_sleep_type_data - * - * PARAMETERS: sleep_state - Numeric sleep state - * *sleep_type_a - Where SLP_TYPa is returned - * *sleep_type_b - Where SLP_TYPb is returned - * - * RETURN: Status - ACPI status - * - * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep - * state. - * - ******************************************************************************/ - -acpi_status -acpi_get_sleep_type_data(u8 sleep_state, u8 * sleep_type_a, u8 * sleep_type_b) -{ - acpi_status status = AE_OK; - struct acpi_evaluate_info *info; - - ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data); - - /* Validate parameters */ - - if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Allocate the evaluation information block */ - - info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); - if (!info) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - info->pathname = - ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]); - - /* Evaluate the namespace object containing the values for this state */ - - status = acpi_ns_evaluate(info); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, - "%s while evaluating SleepState [%s]\n", - acpi_format_exception(status), - info->pathname)); - - goto cleanup; - } - - /* Must have a return object */ - - if (!info->return_object) { - ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]", - info->pathname)); - status = AE_NOT_EXIST; - } - - /* It must be of type Package */ - - else if (ACPI_GET_OBJECT_TYPE(info->return_object) != ACPI_TYPE_PACKAGE) { - ACPI_ERROR((AE_INFO, - "Sleep State return object is not a Package")); - status = AE_AML_OPERAND_TYPE; - } - - /* - * The package must have at least two elements. NOTE (March 2005): This - * goes against the current ACPI spec which defines this object as a - * package with one encoded DWORD element. However, existing practice - * by BIOS vendors seems to be to have 2 or more elements, at least - * one per sleep type (A/B). - */ - else if (info->return_object->package.count < 2) { - ACPI_ERROR((AE_INFO, - "Sleep State return package does not have at least two elements")); - status = AE_AML_NO_OPERAND; - } - - /* The first two elements must both be of type Integer */ - - else if ((ACPI_GET_OBJECT_TYPE(info->return_object->package.elements[0]) - != ACPI_TYPE_INTEGER) || - (ACPI_GET_OBJECT_TYPE(info->return_object->package.elements[1]) - != ACPI_TYPE_INTEGER)) { - ACPI_ERROR((AE_INFO, - "Sleep State return package elements are not both Integers (%s, %s)", - acpi_ut_get_object_type_name(info->return_object-> - package.elements[0]), - acpi_ut_get_object_type_name(info->return_object-> - package.elements[1]))); - status = AE_AML_OPERAND_TYPE; - } else { - /* Valid _Sx_ package size, type, and value */ - - *sleep_type_a = (u8) - (info->return_object->package.elements[0])->integer.value; - *sleep_type_b = (u8) - (info->return_object->package.elements[1])->integer.value; - } - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "While evaluating SleepState [%s], bad Sleep object %p type %s", - info->pathname, info->return_object, - acpi_ut_get_object_type_name(info-> - return_object))); - } - - acpi_ut_remove_reference(info->return_object); - - cleanup: - ACPI_FREE(info); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data) - -/******************************************************************************* - * - * FUNCTION: acpi_hw_get_register_bit_mask - * - * PARAMETERS: register_id - Index of ACPI Register to access - * - * RETURN: The bitmask to be used when accessing the register - * - * DESCRIPTION: Map register_id into a register bitmask. - * - ******************************************************************************/ -struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id) -{ - ACPI_FUNCTION_ENTRY(); - - if (register_id > ACPI_BITREG_MAX) { - ACPI_ERROR((AE_INFO, "Invalid BitRegister ID: %X", - register_id)); - return (NULL); - } - - return (&acpi_gbl_bit_register_info[register_id]); -} - -/******************************************************************************* - * - * FUNCTION: acpi_get_register - * - * PARAMETERS: register_id - ID of ACPI bit_register to access - * return_value - Value that was read from the register - * - * RETURN: Status and the value read from specified Register. Value - * returned is normalized to bit0 (is shifted all the way right) - * - * DESCRIPTION: ACPI bit_register read function. - * - ******************************************************************************/ - -acpi_status acpi_get_register_unlocked(u32 register_id, u32 * return_value) -{ - u32 register_value = 0; - struct acpi_bit_register_info *bit_reg_info; - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_get_register); - - /* Get the info structure corresponding to the requested ACPI Register */ - - bit_reg_info = acpi_hw_get_bit_register_info(register_id); - if (!bit_reg_info) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Read from the register */ - - status = acpi_hw_register_read(bit_reg_info->parent_register, - ®ister_value); - - if (ACPI_SUCCESS(status)) { - - /* Normalize the value that was read */ - - register_value = - ((register_value & bit_reg_info->access_bit_mask) - >> bit_reg_info->bit_position); - - *return_value = register_value; - - ACPI_DEBUG_PRINT((ACPI_DB_IO, "Read value %8.8X register %X\n", - register_value, - bit_reg_info->parent_register)); - } - - return_ACPI_STATUS(status); -} - -acpi_status acpi_get_register(u32 register_id, u32 * return_value) -{ - acpi_status status; - acpi_cpu_flags flags; - flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); - status = acpi_get_register_unlocked(register_id, return_value); - acpi_os_release_lock(acpi_gbl_hardware_lock, flags); - return status; -} - -ACPI_EXPORT_SYMBOL(acpi_get_register) - -/******************************************************************************* - * - * FUNCTION: acpi_set_register - * - * PARAMETERS: register_id - ID of ACPI bit_register to access - * Value - (only used on write) value to write to the - * Register, NOT pre-normalized to the bit pos - * - * RETURN: Status - * - * DESCRIPTION: ACPI Bit Register write function. - * - ******************************************************************************/ -acpi_status acpi_set_register(u32 register_id, u32 value) -{ - u32 register_value = 0; - struct acpi_bit_register_info *bit_reg_info; - acpi_status status; - acpi_cpu_flags lock_flags; - - ACPI_FUNCTION_TRACE_U32(acpi_set_register, register_id); - - /* Get the info structure corresponding to the requested ACPI Register */ - - bit_reg_info = acpi_hw_get_bit_register_info(register_id); - if (!bit_reg_info) { - ACPI_ERROR((AE_INFO, "Bad ACPI HW RegisterId: %X", - register_id)); - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); - - /* Always do a register read first so we can insert the new bits */ - - status = acpi_hw_register_read(bit_reg_info->parent_register, - ®ister_value); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - /* - * Decode the Register ID - * Register ID = [Register block ID] | [bit ID] - * - * Check bit ID to fine locate Register offset. - * Check Mask to determine Register offset, and then read-write. - */ - switch (bit_reg_info->parent_register) { - case ACPI_REGISTER_PM1_STATUS: - - /* - * Status Registers are different from the rest. Clear by - * writing 1, and writing 0 has no effect. So, the only relevant - * information is the single bit we're interested in, all others should - * be written as 0 so they will be left unchanged. - */ - value = ACPI_REGISTER_PREPARE_BITS(value, - bit_reg_info->bit_position, - bit_reg_info-> - access_bit_mask); - if (value) { - status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS, - (u16) value); - register_value = 0; - } - break; - - case ACPI_REGISTER_PM1_ENABLE: - - ACPI_REGISTER_INSERT_VALUE(register_value, - bit_reg_info->bit_position, - bit_reg_info->access_bit_mask, - value); - - status = acpi_hw_register_write(ACPI_REGISTER_PM1_ENABLE, - (u16) register_value); - break; - - case ACPI_REGISTER_PM1_CONTROL: - - /* - * Write the PM1 Control register. - * Note that at this level, the fact that there are actually TWO - * registers (A and B - and B may not exist) is abstracted. - */ - ACPI_DEBUG_PRINT((ACPI_DB_IO, "PM1 control: Read %X\n", - register_value)); - - ACPI_REGISTER_INSERT_VALUE(register_value, - bit_reg_info->bit_position, - bit_reg_info->access_bit_mask, - value); - - status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, - (u16) register_value); - break; - - case ACPI_REGISTER_PM2_CONTROL: - - status = acpi_hw_register_read(ACPI_REGISTER_PM2_CONTROL, - ®ister_value); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - ACPI_DEBUG_PRINT((ACPI_DB_IO, - "PM2 control: Read %X from %8.8X%8.8X\n", - register_value, - ACPI_FORMAT_UINT64(acpi_gbl_FADT. - xpm2_control_block. - address))); - - ACPI_REGISTER_INSERT_VALUE(register_value, - bit_reg_info->bit_position, - bit_reg_info->access_bit_mask, - value); - - ACPI_DEBUG_PRINT((ACPI_DB_IO, - "About to write %4.4X to %8.8X%8.8X\n", - register_value, - ACPI_FORMAT_UINT64(acpi_gbl_FADT. - xpm2_control_block. - address))); - - status = acpi_hw_register_write(ACPI_REGISTER_PM2_CONTROL, - (u8) (register_value)); - break; - - default: - break; - } - - unlock_and_exit: - - acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags); - - /* Normalize the value that was read */ - - ACPI_DEBUG_EXEC(register_value = - ((register_value & bit_reg_info->access_bit_mask) >> - bit_reg_info->bit_position)); - - ACPI_DEBUG_PRINT((ACPI_DB_IO, - "Set bits: %8.8X actual %8.8X register %X\n", value, - register_value, bit_reg_info->parent_register)); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_set_register) - -/****************************************************************************** - * - * FUNCTION: acpi_hw_register_read - * - * PARAMETERS: register_id - ACPI Register ID - * return_value - Where the register value is returned - * - * RETURN: Status and the value read. - * - * DESCRIPTION: Read from the specified ACPI register - * - ******************************************************************************/ -acpi_status -acpi_hw_register_read(u32 register_id, u32 * return_value) -{ - u32 value1 = 0; - u32 value2 = 0; - acpi_status status; - - ACPI_FUNCTION_TRACE(hw_register_read); - - switch (register_id) { - case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ - - status = - acpi_hw_low_level_read(16, &value1, - &acpi_gbl_FADT.xpm1a_event_block); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* PM1B is optional */ - - status = - acpi_hw_low_level_read(16, &value2, - &acpi_gbl_FADT.xpm1b_event_block); - value1 |= value2; - break; - - case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ - - status = - acpi_hw_low_level_read(16, &value1, &acpi_gbl_xpm1a_enable); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* PM1B is optional */ - - status = - acpi_hw_low_level_read(16, &value2, &acpi_gbl_xpm1b_enable); - value1 |= value2; - break; - - case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ - - status = - acpi_hw_low_level_read(16, &value1, - &acpi_gbl_FADT.xpm1a_control_block); - if (ACPI_FAILURE(status)) { - goto exit; - } - - status = - acpi_hw_low_level_read(16, &value2, - &acpi_gbl_FADT.xpm1b_control_block); - value1 |= value2; - break; - - case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ - - status = - acpi_hw_low_level_read(8, &value1, - &acpi_gbl_FADT.xpm2_control_block); - break; - - case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ - - status = - acpi_hw_low_level_read(32, &value1, - &acpi_gbl_FADT.xpm_timer_block); - break; - - case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ - - status = - acpi_os_read_port(acpi_gbl_FADT.smi_command, &value1, 8); - break; - - default: - ACPI_ERROR((AE_INFO, "Unknown Register ID: %X", register_id)); - status = AE_BAD_PARAMETER; - break; - } - - exit: - - if (ACPI_SUCCESS(status)) { - *return_value = value1; - } - - return_ACPI_STATUS(status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_register_write - * - * PARAMETERS: register_id - ACPI Register ID - * Value - The value to write - * - * RETURN: Status - * - * DESCRIPTION: Write to the specified ACPI register - * - * NOTE: In accordance with the ACPI specification, this function automatically - * preserves the value of the following bits, meaning that these bits cannot be - * changed via this interface: - * - * PM1_CONTROL[0] = SCI_EN - * PM1_CONTROL[9] - * PM1_STATUS[11] - * - * ACPI References: - * 1) Hardware Ignored Bits: When software writes to a register with ignored - * bit fields, it preserves the ignored bit fields - * 2) SCI_EN: OSPM always preserves this bit position - * - ******************************************************************************/ - -acpi_status acpi_hw_register_write(u32 register_id, u32 value) -{ - acpi_status status; - u32 read_value; - - ACPI_FUNCTION_TRACE(hw_register_write); - - switch (register_id) { - case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ - - /* Perform a read first to preserve certain bits (per ACPI spec) */ - - status = acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, - &read_value); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* Insert the bits to be preserved */ - - ACPI_INSERT_BITS(value, ACPI_PM1_STATUS_PRESERVED_BITS, - read_value); - - /* Now we can write the data */ - - status = - acpi_hw_low_level_write(16, value, - &acpi_gbl_FADT.xpm1a_event_block); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* PM1B is optional */ - - status = - acpi_hw_low_level_write(16, value, - &acpi_gbl_FADT.xpm1b_event_block); - break; - - case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ - - status = - acpi_hw_low_level_write(16, value, &acpi_gbl_xpm1a_enable); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* PM1B is optional */ - - status = - acpi_hw_low_level_write(16, value, &acpi_gbl_xpm1b_enable); - break; - - case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ - - /* - * Perform a read first to preserve certain bits (per ACPI spec) - */ - status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, - &read_value); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* Insert the bits to be preserved */ - - ACPI_INSERT_BITS(value, ACPI_PM1_CONTROL_PRESERVED_BITS, - read_value); - - /* Now we can write the data */ - - status = - acpi_hw_low_level_write(16, value, - &acpi_gbl_FADT.xpm1a_control_block); - if (ACPI_FAILURE(status)) { - goto exit; - } - - status = - acpi_hw_low_level_write(16, value, - &acpi_gbl_FADT.xpm1b_control_block); - break; - - case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ - - status = - acpi_hw_low_level_write(16, value, - &acpi_gbl_FADT.xpm1a_control_block); - break; - - case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ - - status = - acpi_hw_low_level_write(16, value, - &acpi_gbl_FADT.xpm1b_control_block); - break; - - case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ - - status = - acpi_hw_low_level_write(8, value, - &acpi_gbl_FADT.xpm2_control_block); - break; - - case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ - - status = - acpi_hw_low_level_write(32, value, - &acpi_gbl_FADT.xpm_timer_block); - break; - - case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ - - /* SMI_CMD is currently always in IO space */ - - status = - acpi_os_write_port(acpi_gbl_FADT.smi_command, value, 8); - break; - - default: - status = AE_BAD_PARAMETER; - break; - } - - exit: - return_ACPI_STATUS(status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_low_level_read - * - * PARAMETERS: Width - 8, 16, or 32 - * Value - Where the value is returned - * Reg - GAS register structure - * - * RETURN: Status - * - * DESCRIPTION: Read from either memory or IO space. - * - ******************************************************************************/ - -acpi_status -acpi_hw_low_level_read(u32 width, u32 * value, struct acpi_generic_address *reg) -{ - u64 address; - acpi_status status; - - ACPI_FUNCTION_NAME(hw_low_level_read); - - /* - * Must have a valid pointer to a GAS structure, and - * a non-zero address within. However, don't return an error - * because the PM1A/B code must not fail if B isn't present. - */ - if (!reg) { - return (AE_OK); - } - - /* Get a local copy of the address. Handles possible alignment issues */ - - ACPI_MOVE_64_TO_64(&address, ®->address); - if (!address) { - return (AE_OK); - } - *value = 0; - - /* - * Two address spaces supported: Memory or IO. - * PCI_Config is not supported here because the GAS struct is insufficient - */ - switch (reg->space_id) { - case ACPI_ADR_SPACE_SYSTEM_MEMORY: - - status = acpi_os_read_memory((acpi_physical_address) address, - value, width); - break; - - case ACPI_ADR_SPACE_SYSTEM_IO: - - status = - acpi_os_read_port((acpi_io_address) address, value, width); - break; - - default: - ACPI_ERROR((AE_INFO, - "Unsupported address space: %X", reg->space_id)); - return (AE_BAD_PARAMETER); - } - - ACPI_DEBUG_PRINT((ACPI_DB_IO, - "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", - *value, width, ACPI_FORMAT_UINT64(address), - acpi_ut_get_region_name(reg->space_id))); - - return (status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_hw_low_level_write - * - * PARAMETERS: Width - 8, 16, or 32 - * Value - To be written - * Reg - GAS register structure - * - * RETURN: Status - * - * DESCRIPTION: Write to either memory or IO space. - * - ******************************************************************************/ - -acpi_status -acpi_hw_low_level_write(u32 width, u32 value, struct acpi_generic_address * reg) -{ - u64 address; - acpi_status status; - - ACPI_FUNCTION_NAME(hw_low_level_write); - - /* - * Must have a valid pointer to a GAS structure, and - * a non-zero address within. However, don't return an error - * because the PM1A/B code must not fail if B isn't present. - */ - if (!reg) { - return (AE_OK); - } - - /* Get a local copy of the address. Handles possible alignment issues */ - - ACPI_MOVE_64_TO_64(&address, ®->address); - if (!address) { - return (AE_OK); - } - - /* - * Two address spaces supported: Memory or IO. - * PCI_Config is not supported here because the GAS struct is insufficient - */ - switch (reg->space_id) { - case ACPI_ADR_SPACE_SYSTEM_MEMORY: - - status = acpi_os_write_memory((acpi_physical_address) address, - value, width); - break; - - case ACPI_ADR_SPACE_SYSTEM_IO: - - status = acpi_os_write_port((acpi_io_address) address, value, - width); - break; - - default: - ACPI_ERROR((AE_INFO, - "Unsupported address space: %X", reg->space_id)); - return (AE_BAD_PARAMETER); - } - - ACPI_DEBUG_PRINT((ACPI_DB_IO, - "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", - value, width, ACPI_FORMAT_UINT64(address), - acpi_ut_get_region_name(reg->space_id))); - - return (status); -} diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c deleted file mode 100644 index 25dccdf179b..00000000000 --- a/drivers/acpi/hardware/hwsleep.c +++ /dev/null @@ -1,643 +0,0 @@ - -/****************************************************************************** - * - * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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 <acpi/acpi.h> -#include <acpi/actables.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) -{ - struct acpi_table_facs *facs; - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); - - /* Get the FACS */ - - status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, - ACPI_CAST_INDIRECT_PTR(struct - acpi_table_header, - &facs)); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* - * According to the ACPI specification 2.0c and later, the 64-bit - * waking vector should be cleared and the 32-bit waking vector should - * be used, unless we want the wake-up code to be called by the BIOS in - * Protected Mode. Some systems (for example HP dv5-1004nr) are known - * to fail to resume if the 64-bit vector is used. - */ - if (facs->version >= 1) - facs->xfirmware_waking_vector = 0; - - facs->firmware_waking_vector = (u32)physical_address; - - return_ACPI_STATUS(AE_OK); -} - -ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) - -/******************************************************************************* - * - * 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) -{ - struct acpi_table_facs *facs; - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector); - - if (!physical_address) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Get the FACS */ - - status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, - ACPI_CAST_INDIRECT_PTR(struct - acpi_table_header, - &facs)); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Get the vector */ - *physical_address = (acpi_physical_address)facs->firmware_waking_vector; - - return_ACPI_STATUS(AE_OK); -} - -ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector) -#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 method */ - - status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &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. - * _SST is an optional method (return no error if not found) - */ - status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { - ACPI_EXCEPTION((AE_INFO, status, - "While executing method _SST")); - } - - return_ACPI_STATUS(AE_OK); -} - -ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) - -/******************************************************************************* - * - * 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; - struct acpi_object_list arg_list; - union acpi_object arg; - 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_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", - 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); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Clear all fixed and general purpose status bits */ - - status = acpi_hw_clear_acpi_status(); - 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); - } - - /* Execute the _GTS method */ - - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = sleep_state; - - status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { - return_ACPI_STATUS(status); - } - - /* Get current value of PM1A control */ - - status = acpi_hw_register_read(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_REGISTER_PM1A_CONTROL, - PM1Acontrol); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - status = acpi_hw_register_write(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_REGISTER_PM1A_CONTROL, - PM1Acontrol); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - status = acpi_hw_register_write(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_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_unlocked(ACPI_BITREG_WAKE_STATUS, - &in_value); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Spin until we wake */ - - } while (!in_value); - - return_ACPI_STATUS(AE_OK); -} - -ACPI_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); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - status = acpi_hw_clear_acpi_status(); - 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_command, - (u32) acpi_gbl_FADT.S4bios_request, 8); - - do { - acpi_os_stall(1000); - status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - } while (!in_value); - - return_ACPI_STATUS(AE_OK); -} - -ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) - -/******************************************************************************* - * - * FUNCTION: acpi_leave_sleep_state_prep - * - * PARAMETERS: sleep_state - Which sleep state we are exiting - * - * RETURN: Status - * - * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a - * sleep. - * Called with interrupts DISABLED. - * - ******************************************************************************/ -acpi_status acpi_leave_sleep_state_prep(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_prep); - - /* - * 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_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_REGISTER_PM1A_CONTROL, - PM1Acontrol); - (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, - PM1Bcontrol); - } - } - - /* Execute the _BFS method */ - - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - 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_EXCEPTION((AE_INFO, status, "During Method _BFS")); - } - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * 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; - - ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); - - /* 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_EXCEPTION((AE_INFO, status, "During Method _SST")); - } - - /* - * GPEs must be enabled before _WAK is called as GPEs - * might get fired there - * - * 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); - } - status = acpi_hw_enable_all_runtime_gpes(); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - arg.integer.value = sleep_state; - status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { - ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); - } - /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ - - /* - * Some BIOSes assume that WAK_STS will be cleared on resume and use - * it to determine whether the system is rebooting or resuming. Clear - * it for compatibility. - */ - acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); - - acpi_gbl_system_awake_and_running = TRUE; - - /* Enable power button */ - - (void) - acpi_set_register(acpi_gbl_fixed_event_info - [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); - - (void) - acpi_set_register(acpi_gbl_fixed_event_info - [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); - - 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_EXCEPTION((AE_INFO, status, "During Method _SST")); - } - - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) diff --git a/drivers/acpi/hardware/hwtimer.c b/drivers/acpi/hardware/hwtimer.c deleted file mode 100644 index b53d575491b..00000000000 --- a/drivers/acpi/hardware/hwtimer.c +++ /dev/null @@ -1,187 +0,0 @@ - -/****************************************************************************** - * - * Name: hwtimer.c - ACPI Power Management Timer Interface - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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 <acpi/acpi.h> - -#define _COMPONENT ACPI_HARDWARE -ACPI_MODULE_NAME("hwtimer") - -/****************************************************************************** - * - * FUNCTION: acpi_get_timer_resolution - * - * PARAMETERS: Resolution - Where the resolution is returned - * - * RETURN: Status and timer resolution - * - * DESCRIPTION: Obtains resolution of the ACPI PM Timer (24 or 32 bits). - * - ******************************************************************************/ -acpi_status acpi_get_timer_resolution(u32 * resolution) -{ - ACPI_FUNCTION_TRACE(acpi_get_timer_resolution); - - if (!resolution) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - if ((acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) == 0) { - *resolution = 24; - } else { - *resolution = 32; - } - - return_ACPI_STATUS(AE_OK); -} - -ACPI_EXPORT_SYMBOL(acpi_get_timer_resolution) - -/****************************************************************************** - * - * FUNCTION: acpi_get_timer - * - * PARAMETERS: Ticks - Where the timer value is returned - * - * RETURN: Status and current timer value (ticks) - * - * DESCRIPTION: Obtains current value of ACPI PM Timer (in ticks). - * - ******************************************************************************/ -acpi_status acpi_get_timer(u32 * ticks) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_get_timer); - - if (!ticks) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - status = - acpi_hw_low_level_read(32, ticks, &acpi_gbl_FADT.xpm_timer_block); - - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_get_timer) - -/****************************************************************************** - * - * FUNCTION: acpi_get_timer_duration - * - * PARAMETERS: start_ticks - Starting timestamp - * end_ticks - End timestamp - * time_elapsed - Where the elapsed time is returned - * - * RETURN: Status and time_elapsed - * - * DESCRIPTION: Computes the time elapsed (in microseconds) between two - * PM Timer time stamps, taking into account the possibility of - * rollovers, the timer resolution, and timer frequency. - * - * The PM Timer's clock ticks at roughly 3.6 times per - * _microsecond_, and its clock continues through Cx state - * transitions (unlike many CPU timestamp counters) -- making it - * a versatile and accurate timer. - * - * Note that this function accommodates only a single timer - * rollover. Thus for 24-bit timers, this function should only - * be used for calculating durations less than ~4.6 seconds - * (~20 minutes for 32-bit timers) -- calculations below: - * - * 2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec - * 2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes - * - ******************************************************************************/ -acpi_status -acpi_get_timer_duration(u32 start_ticks, u32 end_ticks, u32 * time_elapsed) -{ - acpi_status status; - u32 delta_ticks; - acpi_integer quotient; - - ACPI_FUNCTION_TRACE(acpi_get_timer_duration); - - if (!time_elapsed) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* - * Compute Tick Delta: - * Handle (max one) timer rollovers on 24-bit versus 32-bit timers. - */ - if (start_ticks < end_ticks) { - delta_ticks = end_ticks - start_ticks; - } else if (start_ticks > end_ticks) { - if ((acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) == 0) { - - /* 24-bit Timer */ - - delta_ticks = - (((0x00FFFFFF - start_ticks) + - end_ticks) & 0x00FFFFFF); - } else { - /* 32-bit Timer */ - - delta_ticks = (0xFFFFFFFF - start_ticks) + end_ticks; - } - } else { /* start_ticks == end_ticks */ - - *time_elapsed = 0; - return_ACPI_STATUS(AE_OK); - } - - /* - * Compute Duration (Requires a 64-bit multiply and divide): - * - * time_elapsed = (delta_ticks * 1000000) / PM_TIMER_FREQUENCY; - */ - status = acpi_ut_short_divide(((u64) delta_ticks) * 1000000, - PM_TIMER_FREQUENCY, "ient, NULL); - - *time_elapsed = (u32) quotient; - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_get_timer_duration) |