| |
| /******************************************************************************* |
| * |
| * Module Name: hwregs - Read/write access functions for the various ACPI |
| * control and status registers. |
| * |
| ******************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2006, 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 <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: Flags - Lock the hardware or not |
| * |
| * 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(u32 flags) |
| { |
| acpi_status status; |
| |
| 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_evt_blk.address)); |
| |
| if (flags & ACPI_MTX_LOCK) { |
| status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| } |
| |
| status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
| 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_evt_blk.address) { |
| status = |
| acpi_hw_low_level_write(16, ACPI_BITMASK_ALL_FIXED_STATUS, |
| &acpi_gbl_FADT->xpm1b_evt_blk); |
| 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: |
| if (flags & ACPI_MTX_LOCK) { |
| (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
| } |
| 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_parameter_info info; |
| char *sleep_state_name; |
| |
| 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); |
| } |
| |
| /* Evaluate the namespace object containing the values for this state */ |
| |
| info.parameters = NULL; |
| info.return_object = NULL; |
| sleep_state_name = |
| ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]); |
| |
| status = acpi_ns_evaluate_by_name(sleep_state_name, &info); |
| if (ACPI_FAILURE(status)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| "%s while evaluating SleepState [%s]\n", |
| acpi_format_exception(status), |
| sleep_state_name)); |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /* Must have a return object */ |
| |
| if (!info.return_object) { |
| ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]", |
| sleep_state_name)); |
| 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", |
| sleep_state_name, info.return_object, |
| acpi_ut_get_object_type_name(info. |
| return_object))); |
| } |
| |
| acpi_ut_remove_reference(info.return_object); |
| 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 |
| * Flags - Lock the hardware or not |
| * |
| * 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(u32 register_id, u32 * return_value, u32 flags) |
| { |
| 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); |
| } |
| |
| if (flags & ACPI_MTX_LOCK) { |
| status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| } |
| |
| /* Read from the register */ |
| |
| status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
| bit_reg_info->parent_register, |
| ®ister_value); |
| |
| if (flags & ACPI_MTX_LOCK) { |
| (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
| } |
| |
| 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_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 |
| * Flags - Lock the hardware or not |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: ACPI Bit Register write function. |
| * |
| ******************************************************************************/ |
| acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags) |
| { |
| u32 register_value = 0; |
| struct acpi_bit_register_info *bit_reg_info; |
| acpi_status status; |
| |
| 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); |
| } |
| |
| if (flags & ACPI_MTX_LOCK) { |
| status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| } |
| |
| /* Always do a register read first so we can insert the new bits */ |
| |
| status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
| 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_MTX_DO_NOT_LOCK, |
| 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_MTX_DO_NOT_LOCK, |
| 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_MTX_DO_NOT_LOCK, |
| ACPI_REGISTER_PM1_CONTROL, |
| (u16) register_value); |
| break; |
| |
| case ACPI_REGISTER_PM2_CONTROL: |
| |
| status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
| 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_cnt_blk.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_cnt_blk.address))); |
| |
| status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
| ACPI_REGISTER_PM2_CONTROL, |
| (u8) (register_value)); |
| break; |
| |
| default: |
| break; |
| } |
| |
| unlock_and_exit: |
| |
| if (flags & ACPI_MTX_LOCK) { |
| (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
| } |
| |
| /* 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: use_lock - Mutex hw access |
| * register_id - register_iD + Offset |
| * return_value - Where the register value is returned |
| * |
| * RETURN: Status and the value read. |
| * |
| * DESCRIPTION: Acpi register read function. Registers are read at the |
| * given offset. |
| * |
| ******************************************************************************/ |
| acpi_status |
| acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value) |
| { |
| u32 value1 = 0; |
| u32 value2 = 0; |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(hw_register_read); |
| |
| if (ACPI_MTX_LOCK == use_lock) { |
| status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| } |
| |
| switch (register_id) { |
| case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ |
| |
| status = |
| acpi_hw_low_level_read(16, &value1, |
| &acpi_gbl_FADT->xpm1a_evt_blk); |
| if (ACPI_FAILURE(status)) { |
| goto unlock_and_exit; |
| } |
| |
| /* PM1B is optional */ |
| |
| status = |
| acpi_hw_low_level_read(16, &value2, |
| &acpi_gbl_FADT->xpm1b_evt_blk); |
| 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 unlock_and_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_cnt_blk); |
| if (ACPI_FAILURE(status)) { |
| goto unlock_and_exit; |
| } |
| |
| status = |
| acpi_hw_low_level_read(16, &value2, |
| &acpi_gbl_FADT->xpm1b_cnt_blk); |
| value1 |= value2; |
| break; |
| |
| case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ |
| |
| status = |
| acpi_hw_low_level_read(8, &value1, |
| &acpi_gbl_FADT->xpm2_cnt_blk); |
| break; |
| |
| case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ |
| |
| status = |
| acpi_hw_low_level_read(32, &value1, |
| &acpi_gbl_FADT->xpm_tmr_blk); |
| break; |
| |
| case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ |
| |
| status = acpi_os_read_port(acpi_gbl_FADT->smi_cmd, &value1, 8); |
| break; |
| |
| default: |
| ACPI_ERROR((AE_INFO, "Unknown Register ID: %X", register_id)); |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| unlock_and_exit: |
| if (ACPI_MTX_LOCK == use_lock) { |
| (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
| } |
| |
| if (ACPI_SUCCESS(status)) { |
| *return_value = value1; |
| } |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_hw_register_write |
| * |
| * PARAMETERS: use_lock - Mutex hw access |
| * register_id - register_iD + Offset |
| * Value - The value to write |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Acpi register Write function. Registers are written at the |
| * given offset. |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_hw_register_write(u8 use_lock, u32 register_id, u32 value) |
| { |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(hw_register_write); |
| |
| if (ACPI_MTX_LOCK == use_lock) { |
| status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| } |
| |
| switch (register_id) { |
| case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ |
| |
| status = |
| acpi_hw_low_level_write(16, value, |
| &acpi_gbl_FADT->xpm1a_evt_blk); |
| if (ACPI_FAILURE(status)) { |
| goto unlock_and_exit; |
| } |
| |
| /* PM1B is optional */ |
| |
| status = |
| acpi_hw_low_level_write(16, value, |
| &acpi_gbl_FADT->xpm1b_evt_blk); |
| 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 unlock_and_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 */ |
| |
| status = |
| acpi_hw_low_level_write(16, value, |
| &acpi_gbl_FADT->xpm1a_cnt_blk); |
| if (ACPI_FAILURE(status)) { |
| goto unlock_and_exit; |
| } |
| |
| status = |
| acpi_hw_low_level_write(16, value, |
| &acpi_gbl_FADT->xpm1b_cnt_blk); |
| break; |
| |
| case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ |
| |
| status = |
| acpi_hw_low_level_write(16, value, |
| &acpi_gbl_FADT->xpm1a_cnt_blk); |
| break; |
| |
| case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ |
| |
| status = |
| acpi_hw_low_level_write(16, value, |
| &acpi_gbl_FADT->xpm1b_cnt_blk); |
| break; |
| |
| case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ |
| |
| status = |
| acpi_hw_low_level_write(8, value, |
| &acpi_gbl_FADT->xpm2_cnt_blk); |
| break; |
| |
| case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ |
| |
| status = |
| acpi_hw_low_level_write(32, value, |
| &acpi_gbl_FADT->xpm_tmr_blk); |
| 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_cmd, value, 8); |
| break; |
| |
| default: |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| unlock_and_exit: |
| if (ACPI_MTX_LOCK == use_lock) { |
| (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
| } |
| |
| 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->address_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->address_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->address_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->address_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->address_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->address_space_id))); |
| |
| return (status); |
| } |