diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/hardware/Makefile | 2 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwregs.c | 498 | ||||
| -rw-r--r-- | drivers/acpi/hardware/hwxface.c | 555 |
3 files changed, 558 insertions, 497 deletions
diff --git a/drivers/acpi/hardware/Makefile b/drivers/acpi/hardware/Makefile index 438ad373b9a..238fbe513b8 100644 --- a/drivers/acpi/hardware/Makefile +++ b/drivers/acpi/hardware/Makefile @@ -2,7 +2,7 @@ # Makefile for all Linux ACPI interpreter subdirectories # -obj-y := hwacpi.o hwgpe.o hwregs.o hwsleep.o +obj-y := hwacpi.o hwgpe.o hwregs.o hwsleep.o hwxface.o obj-$(ACPI_FUTURE_USAGE) += hwtimer.o diff --git a/drivers/acpi/hardware/hwregs.c b/drivers/acpi/hardware/hwregs.c index d6d2ec6969f..981e5db21a3 100644 --- a/drivers/acpi/hardware/hwregs.c +++ b/drivers/acpi/hardware/hwregs.c @@ -56,7 +56,7 @@ ACPI_MODULE_NAME("hwregs") * * PARAMETERS: None * - * RETURN: None + * RETURN: Status * * DESCRIPTION: Clears all fixed and general purpose status bits * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED @@ -102,125 +102,6 @@ acpi_status acpi_hw_clear_acpi_status(void) /******************************************************************************* * - * 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 @@ -230,6 +111,7 @@ ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data) * 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(); @@ -243,223 +125,6 @@ struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id) return (&acpi_gbl_bit_register_info[register_id]); } -ACPI_EXPORT_SYMBOL(acpi_get_register_unlocked) - -/******************************************************************************* - * - * 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 @@ -685,162 +350,3 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value) exit: return_ACPI_STATUS(status); } - -/****************************************************************************** - * - * FUNCTION: acpi_read - * - * PARAMETERS: Value - Where the value is returned - * Reg - GAS register structure - * - * RETURN: Status - * - * DESCRIPTION: Read from either memory or IO space. - * - ******************************************************************************/ - -acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg) -{ - u32 width; - u64 address; - acpi_status status; - - ACPI_FUNCTION_NAME(acpi_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); - } - - /* Supported widths are 8/16/32 */ - - width = reg->bit_width; - if ((width != 8) && (width != 16) && (width != 32)) { - return (AE_SUPPORT); - } - - /* Initialize entire 32-bit return value to zero */ - - *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); -} - -ACPI_EXPORT_SYMBOL(acpi_read) - -/****************************************************************************** - * - * FUNCTION: acpi_write - * - * PARAMETERS: Value - To be written - * Reg - GAS register structure - * - * RETURN: Status - * - * DESCRIPTION: Write to either memory or IO space. - * - ******************************************************************************/ - -acpi_status -acpi_write(u32 value, struct acpi_generic_address *reg) -{ - u32 width; - u64 address; - acpi_status status; - - ACPI_FUNCTION_NAME(acpi_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); - } - - /* Supported widths are 8/16/32 */ - - width = reg->bit_width; - if ((width != 8) && (width != 16) && (width != 32)) { - return (AE_SUPPORT); - } - - /* - * 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); -} - -ACPI_EXPORT_SYMBOL(acpi_write) diff --git a/drivers/acpi/hardware/hwxface.c b/drivers/acpi/hardware/hwxface.c new file mode 100644 index 00000000000..b6244a0fcf4 --- /dev/null +++ b/drivers/acpi/hardware/hwxface.c @@ -0,0 +1,555 @@ + +/****************************************************************************** + * + * Module Name: hwxface - Public ACPICA hardware interfaces + * + *****************************************************************************/ + +/* + * 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> + +#define _COMPONENT ACPI_HARDWARE +ACPI_MODULE_NAME("hwxface") + +/****************************************************************************** + * + * FUNCTION: acpi_read + * + * PARAMETERS: Value - Where the value is returned + * Reg - GAS register structure + * + * RETURN: Status + * + * DESCRIPTION: Read from either memory or IO space. + * + ******************************************************************************/ +acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg) +{ + u32 width; + u64 address; + acpi_status status; + + ACPI_FUNCTION_NAME(acpi_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); + } + + /* Supported widths are 8/16/32 */ + + width = reg->bit_width; + if ((width != 8) && (width != 16) && (width != 32)) { + return (AE_SUPPORT); + } + + /* Initialize entire 32-bit return value to zero */ + + *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); +} + +ACPI_EXPORT_SYMBOL(acpi_read) + +/****************************************************************************** + * + * FUNCTION: acpi_write + * + * PARAMETERS: Value - To be written + * Reg - GAS register structure + * + * RETURN: Status + * + * DESCRIPTION: Write to either memory or IO space. + * + ******************************************************************************/ +acpi_status acpi_write(u32 value, struct acpi_generic_address *reg) +{ + u32 width; + u64 address; + acpi_status status; + + ACPI_FUNCTION_NAME(acpi_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); + } + + /* Supported widths are 8/16/32 */ + + width = reg->bit_width; + if ((width != 8) && (width != 16) && (width != 32)) { + return (AE_SUPPORT); + } + + /* + * 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); +} + +ACPI_EXPORT_SYMBOL(acpi_write) + +/******************************************************************************* + * + * FUNCTION: acpi_get_register_unlocked + * + * 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. Does not acquire the HW lock. + * + ******************************************************************************/ +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_unlocked); + + /* 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_EXPORT_SYMBOL(acpi_get_register_unlocked) + +/******************************************************************************* + * + * 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(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_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) |