*
* PARAMETERS: None
*
- * RETURN: None
+ * RETURN: Status
*
* DESCRIPTION: Clears all fixed and general purpose status bits
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
/*******************************************************************************
*
- * 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
* 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();
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
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)
--- /dev/null
+
+/******************************************************************************
+ *
+ * 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)
projects / kernel / kernel-generic.git / commitdiff