594 lines
17 KiB
C
594 lines
17 KiB
C
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/******************************************************************************
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*
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* Module Name: hwxface - Public ACPICA hardware interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME("hwxface")
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/******************************************************************************
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*
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* FUNCTION: acpi_reset
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Set reset register in memory or IO space. Note: Does not
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* support reset register in PCI config space, this must be
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* handled separately.
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*
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******************************************************************************/
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acpi_status acpi_reset(void)
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{
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struct acpi_generic_address *reset_reg;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_reset);
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reset_reg = &acpi_gbl_FADT.reset_register;
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/* Check if the reset register is supported */
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if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) ||
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!reset_reg->address) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/* Write the reset value to the reset register */
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status = acpi_write(acpi_gbl_FADT.reset_value, reset_reg);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_reset)
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/******************************************************************************
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*
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* FUNCTION: acpi_read
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*
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* PARAMETERS: Value - Where the value is returned
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* Reg - GAS register structure
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from either memory or IO space.
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*
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******************************************************************************/
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acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg)
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{
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u32 width;
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u64 address;
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acpi_status status;
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ACPI_FUNCTION_NAME(acpi_read);
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/*
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* Must have a valid pointer to a GAS structure, and
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* a non-zero address within. However, don't return an error
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* because the PM1A/B code must not fail if B isn't present.
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*/
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if (!reg) {
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return (AE_OK);
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}
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/* Get a local copy of the address. Handles possible alignment issues */
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ACPI_MOVE_64_TO_64(&address, ®->address);
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if (!address) {
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return (AE_OK);
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}
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/* Supported widths are 8/16/32 */
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width = reg->bit_width;
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if ((width != 8) && (width != 16) && (width != 32)) {
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return (AE_SUPPORT);
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}
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/* Initialize entire 32-bit return value to zero */
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*value = 0;
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/*
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* Two address spaces supported: Memory or IO.
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* PCI_Config is not supported here because the GAS struct is insufficient
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*/
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switch (reg->space_id) {
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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status = acpi_os_read_memory((acpi_physical_address) address,
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value, width);
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break;
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case ACPI_ADR_SPACE_SYSTEM_IO:
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status =
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acpi_os_read_port((acpi_io_address) address, value, width);
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unsupported address space: %X", reg->space_id));
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return (AE_BAD_PARAMETER);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_IO,
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"Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
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*value, width, ACPI_FORMAT_UINT64(address),
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acpi_ut_get_region_name(reg->space_id)));
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_read)
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/******************************************************************************
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*
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* FUNCTION: acpi_write
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*
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* PARAMETERS: Value - To be written
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* Reg - GAS register structure
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to either memory or IO space.
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*
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******************************************************************************/
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acpi_status acpi_write(u32 value, struct acpi_generic_address *reg)
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{
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u32 width;
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u64 address;
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acpi_status status;
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ACPI_FUNCTION_NAME(acpi_write);
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/*
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* Must have a valid pointer to a GAS structure, and
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* a non-zero address within. However, don't return an error
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* because the PM1A/B code must not fail if B isn't present.
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*/
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if (!reg) {
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return (AE_OK);
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}
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/* Get a local copy of the address. Handles possible alignment issues */
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ACPI_MOVE_64_TO_64(&address, ®->address);
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if (!address) {
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return (AE_OK);
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}
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/* Supported widths are 8/16/32 */
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width = reg->bit_width;
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if ((width != 8) && (width != 16) && (width != 32)) {
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return (AE_SUPPORT);
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}
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/*
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* Two address spaces supported: Memory or IO.
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* PCI_Config is not supported here because the GAS struct is insufficient
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*/
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switch (reg->space_id) {
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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status = acpi_os_write_memory((acpi_physical_address) address,
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value, width);
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break;
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case ACPI_ADR_SPACE_SYSTEM_IO:
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status = acpi_os_write_port((acpi_io_address) address, value,
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width);
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unsupported address space: %X", reg->space_id));
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return (AE_BAD_PARAMETER);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_IO,
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"Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
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value, width, ACPI_FORMAT_UINT64(address),
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acpi_ut_get_region_name(reg->space_id)));
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_write)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_register_unlocked
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*
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* PARAMETERS: register_id - ID of ACPI bit_register to access
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* return_value - Value that was read from the register
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*
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* RETURN: Status and the value read from specified Register. Value
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* returned is normalized to bit0 (is shifted all the way right)
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*
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* DESCRIPTION: ACPI bit_register read function. Does not acquire the HW lock.
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*
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******************************************************************************/
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acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value)
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{
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u32 register_value = 0;
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struct acpi_bit_register_info *bit_reg_info;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_get_register_unlocked);
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/* Get the info structure corresponding to the requested ACPI Register */
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bit_reg_info = acpi_hw_get_bit_register_info(register_id);
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if (!bit_reg_info) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Read from the register */
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status = acpi_hw_register_read(bit_reg_info->parent_register,
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®ister_value);
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if (ACPI_SUCCESS(status)) {
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/* Normalize the value that was read */
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register_value =
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((register_value & bit_reg_info->access_bit_mask)
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>> bit_reg_info->bit_position);
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*return_value = register_value;
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ACPI_DEBUG_PRINT((ACPI_DB_IO, "Read value %8.8X register %X\n",
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register_value,
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bit_reg_info->parent_register));
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}
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_register_unlocked)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_register
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*
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* PARAMETERS: register_id - ID of ACPI bit_register to access
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* return_value - Value that was read from the register
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*
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* RETURN: Status and the value read from specified Register. Value
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* returned is normalized to bit0 (is shifted all the way right)
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*
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* DESCRIPTION: ACPI bit_register read function.
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*
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******************************************************************************/
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acpi_status acpi_get_register(u32 register_id, u32 *return_value)
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{
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acpi_status status;
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acpi_cpu_flags flags;
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flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
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status = acpi_get_register_unlocked(register_id, return_value);
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acpi_os_release_lock(acpi_gbl_hardware_lock, flags);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_register)
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/*******************************************************************************
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*
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* FUNCTION: acpi_set_register
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*
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* PARAMETERS: register_id - ID of ACPI bit_register to access
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* Value - (only used on write) value to write to the
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* Register, NOT pre-normalized to the bit pos
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*
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* RETURN: Status
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*
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* DESCRIPTION: ACPI Bit Register write function.
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*
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******************************************************************************/
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acpi_status acpi_set_register(u32 register_id, u32 value)
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{
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u32 register_value = 0;
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struct acpi_bit_register_info *bit_reg_info;
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acpi_status status;
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acpi_cpu_flags lock_flags;
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ACPI_FUNCTION_TRACE_U32(acpi_set_register, register_id);
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/* Get the info structure corresponding to the requested ACPI Register */
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bit_reg_info = acpi_hw_get_bit_register_info(register_id);
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if (!bit_reg_info) {
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ACPI_ERROR((AE_INFO, "Bad ACPI HW RegisterId: %X",
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register_id));
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
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/* Always do a register read first so we can insert the new bits */
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status = acpi_hw_register_read(bit_reg_info->parent_register,
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®ister_value);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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/*
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* Decode the Register ID
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* Register ID = [Register block ID] | [bit ID]
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*
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* Check bit ID to fine locate Register offset.
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* Check Mask to determine Register offset, and then read-write.
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*/
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switch (bit_reg_info->parent_register) {
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case ACPI_REGISTER_PM1_STATUS:
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/*
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* Status Registers are different from the rest. Clear by
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* writing 1, and writing 0 has no effect. So, the only relevant
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* information is the single bit we're interested in, all others should
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* be written as 0 so they will be left unchanged.
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*/
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value = ACPI_REGISTER_PREPARE_BITS(value,
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bit_reg_info->bit_position,
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bit_reg_info->
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access_bit_mask);
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if (value) {
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status =
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acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS,
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(u16) value);
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register_value = 0;
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}
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break;
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case ACPI_REGISTER_PM1_ENABLE:
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ACPI_REGISTER_INSERT_VALUE(register_value,
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bit_reg_info->bit_position,
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bit_reg_info->access_bit_mask,
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value);
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status = acpi_hw_register_write(ACPI_REGISTER_PM1_ENABLE,
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(u16) register_value);
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break;
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case ACPI_REGISTER_PM1_CONTROL:
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/*
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* Write the PM1 Control register.
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* Note that at this level, the fact that there are actually TWO
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* registers (A and B - and B may not exist) is abstracted.
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_IO, "PM1 control: Read %X\n",
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register_value));
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ACPI_REGISTER_INSERT_VALUE(register_value,
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bit_reg_info->bit_position,
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bit_reg_info->access_bit_mask,
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value);
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status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
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(u16) register_value);
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break;
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case ACPI_REGISTER_PM2_CONTROL:
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status = acpi_hw_register_read(ACPI_REGISTER_PM2_CONTROL,
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®ister_value);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_IO,
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"PM2 control: Read %X from %8.8X%8.8X\n",
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register_value,
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ACPI_FORMAT_UINT64(acpi_gbl_FADT.
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xpm2_control_block.
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address)));
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ACPI_REGISTER_INSERT_VALUE(register_value,
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bit_reg_info->bit_position,
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bit_reg_info->access_bit_mask,
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value);
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ACPI_DEBUG_PRINT((ACPI_DB_IO,
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"About to write %4.4X to %8.8X%8.8X\n",
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register_value,
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ACPI_FORMAT_UINT64(acpi_gbl_FADT.
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xpm2_control_block.
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address)));
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status = acpi_hw_register_write(ACPI_REGISTER_PM2_CONTROL,
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(u8) (register_value));
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break;
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default:
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break;
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}
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unlock_and_exit:
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acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
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/* Normalize the value that was read */
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ACPI_DEBUG_EXEC(register_value =
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((register_value & bit_reg_info->access_bit_mask) >>
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bit_reg_info->bit_position));
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ACPI_DEBUG_PRINT((ACPI_DB_IO,
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"Set bits: %8.8X actual %8.8X register %X\n", value,
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register_value, bit_reg_info->parent_register));
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_set_register)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_sleep_type_data
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*
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* PARAMETERS: sleep_state - Numeric sleep state
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* *sleep_type_a - Where SLP_TYPa is returned
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* *sleep_type_b - Where SLP_TYPb is returned
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*
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* RETURN: Status - ACPI status
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*
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* DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
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* state.
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*
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******************************************************************************/
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acpi_status
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acpi_get_sleep_type_data(u8 sleep_state, u8 *sleep_type_a, u8 *sleep_type_b)
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{
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acpi_status status = AE_OK;
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struct acpi_evaluate_info *info;
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ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data);
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/* Validate parameters */
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if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Allocate the evaluation information block */
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info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
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if (!info) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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info->pathname =
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ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]);
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/* Evaluate the namespace object containing the values for this state */
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status = acpi_ns_evaluate(info);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"%s while evaluating SleepState [%s]\n",
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acpi_format_exception(status),
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info->pathname));
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goto cleanup;
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}
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/* Must have a return object */
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if (!info->return_object) {
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ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]",
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info->pathname));
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status = AE_NOT_EXIST;
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}
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/* It must be of type Package */
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else if (ACPI_GET_OBJECT_TYPE(info->return_object) != ACPI_TYPE_PACKAGE) {
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ACPI_ERROR((AE_INFO,
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"Sleep State return object is not a Package"));
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status = AE_AML_OPERAND_TYPE;
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}
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/*
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* 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)
|