forked from luck/tmp_suning_uos_patched
75ec6e55f1
Changes to correct several GPIO issues: 1) The update_rule in a GPIO field definition is now ignored; a read-modify-write operation is never performed for GPIO fields. (Internally, this means that the field assembly/disassembly code is completely bypassed for GPIO.) 2) The Address parameter passed to a GPIO region handler is now the bit offset of the field from a previous Connection() operator. Thus, it becomes a "Pin Number Index" into the Connection() resource descriptor. 3) The bit_width parameter passed to a GPIO region handler is now the exact bit width of the GPIO field. Thus, it can be interpreted as "number of pins". Overall, we can now say that the region handler interface to GPIO handlers is a raw "bit/pin" addressed interface, not a byte-addressed interface like the system_memory handler interface. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: 3.15+ <stable@vger.kernel.org> # 3.15+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
537 lines
16 KiB
C
537 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: exfield - ACPI AML (p-code) execution - field manipulation
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, 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 "acdispat.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exfield")
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/* Local prototypes */
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static u32
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acpi_ex_get_serial_access_length(u32 accessor_type, u32 access_length);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_get_serial_access_length
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*
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* PARAMETERS: accessor_type - The type of the protocol indicated by region
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* field access attributes
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* access_length - The access length of the region field
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*
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* RETURN: Decoded access length
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*
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* DESCRIPTION: This routine returns the length of the generic_serial_bus
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* protocol bytes
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*
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******************************************************************************/
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static u32
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acpi_ex_get_serial_access_length(u32 accessor_type, u32 access_length)
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{
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u32 length;
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switch (accessor_type) {
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case AML_FIELD_ATTRIB_QUICK:
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length = 0;
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break;
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case AML_FIELD_ATTRIB_SEND_RCV:
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case AML_FIELD_ATTRIB_BYTE:
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length = 1;
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break;
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case AML_FIELD_ATTRIB_WORD:
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case AML_FIELD_ATTRIB_WORD_CALL:
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length = 2;
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break;
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case AML_FIELD_ATTRIB_MULTIBYTE:
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case AML_FIELD_ATTRIB_RAW_BYTES:
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case AML_FIELD_ATTRIB_RAW_PROCESS:
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length = access_length;
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break;
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case AML_FIELD_ATTRIB_BLOCK:
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case AML_FIELD_ATTRIB_BLOCK_CALL:
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default:
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length = ACPI_GSBUS_BUFFER_SIZE - 2;
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break;
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}
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return (length);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_read_data_from_field
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*
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* PARAMETERS: walk_state - Current execution state
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* obj_desc - The named field
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* ret_buffer_desc - Where the return data object is stored
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from a named field. Returns either an Integer or a
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* Buffer, depending on the size of the field.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_read_data_from_field(struct acpi_walk_state * walk_state,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **ret_buffer_desc)
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{
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acpi_status status;
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union acpi_operand_object *buffer_desc;
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acpi_size length;
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void *buffer;
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u32 function;
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u16 accessor_type;
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ACPI_FUNCTION_TRACE_PTR(ex_read_data_from_field, obj_desc);
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/* Parameter validation */
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if (!obj_desc) {
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return_ACPI_STATUS(AE_AML_NO_OPERAND);
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}
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if (!ret_buffer_desc) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) {
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/*
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* If the buffer_field arguments have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
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status = acpi_ds_get_buffer_field_arguments(obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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} else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_SMBUS
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|| obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_GSBUS
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|| obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_IPMI)) {
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/*
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* This is an SMBus, GSBus or IPMI read. We must create a buffer to hold
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* the data and then directly access the region handler.
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*
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* Note: SMBus and GSBus protocol value is passed in upper 16-bits of Function
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*/
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if (obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_SMBUS) {
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length = ACPI_SMBUS_BUFFER_SIZE;
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function =
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ACPI_READ | (obj_desc->field.attribute << 16);
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} else if (obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_GSBUS) {
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accessor_type = obj_desc->field.attribute;
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length = acpi_ex_get_serial_access_length(accessor_type,
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obj_desc->
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field.
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access_length);
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/*
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* Add additional 2 bytes for the generic_serial_bus data buffer:
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*
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* Status; (Byte 0 of the data buffer)
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* Length; (Byte 1 of the data buffer)
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* Data[x-1]; (Bytes 2-x of the arbitrary length data buffer)
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*/
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length += 2;
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function = ACPI_READ | (accessor_type << 16);
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} else { /* IPMI */
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length = ACPI_IPMI_BUFFER_SIZE;
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function = ACPI_READ;
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}
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buffer_desc = acpi_ut_create_buffer_object(length);
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if (!buffer_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Call the region handler for the read */
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status = acpi_ex_access_region(obj_desc, 0,
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ACPI_CAST_PTR(u64,
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buffer_desc->
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buffer.pointer),
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function);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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goto exit;
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}
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/*
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* Allocate a buffer for the contents of the field.
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*
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* If the field is larger than the current integer width, create
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* a BUFFER to hold it. Otherwise, use an INTEGER. This allows
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* the use of arithmetic operators on the returned value if the
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* field size is equal or smaller than an Integer.
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*
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* Note: Field.length is in bits.
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*/
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length =
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(acpi_size) ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length);
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if (length > acpi_gbl_integer_byte_width) {
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/* Field is too large for an Integer, create a Buffer instead */
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buffer_desc = acpi_ut_create_buffer_object(length);
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if (!buffer_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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buffer = buffer_desc->buffer.pointer;
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} else {
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/* Field will fit within an Integer (normal case) */
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buffer_desc = acpi_ut_create_integer_object((u64) 0);
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if (!buffer_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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length = acpi_gbl_integer_byte_width;
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buffer = &buffer_desc->integer.value;
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}
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if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_GPIO)) {
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/*
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* For GPIO (general_purpose_io), the Address will be the bit offset
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* from the previous Connection() operator, making it effectively a
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* pin number index. The bit_length is the length of the field, which
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* is thus the number of pins.
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"GPIO FieldRead [FROM]: Pin %u Bits %u\n",
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obj_desc->field.pin_number_index,
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obj_desc->field.bit_length));
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Perform the write */
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status = acpi_ex_access_region(obj_desc, 0,
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(u64 *)buffer, ACPI_READ);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(buffer_desc);
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} else {
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*ret_buffer_desc = buffer_desc;
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}
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n",
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obj_desc, obj_desc->common.type, buffer,
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(u32) length));
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n",
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obj_desc->common_field.bit_length,
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obj_desc->common_field.start_field_bit_offset,
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obj_desc->common_field.base_byte_offset));
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Read from the field */
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status = acpi_ex_extract_from_field(obj_desc, buffer, (u32) length);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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exit:
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(buffer_desc);
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} else {
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*ret_buffer_desc = buffer_desc;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_write_data_to_field
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*
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* PARAMETERS: source_desc - Contains data to write
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* obj_desc - The named field
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* result_desc - Where the return value is returned, if any
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to a named field
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*
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******************************************************************************/
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acpi_status
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acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **result_desc)
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{
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acpi_status status;
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u32 length;
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void *buffer;
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union acpi_operand_object *buffer_desc;
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u32 function;
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u16 accessor_type;
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ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc);
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/* Parameter validation */
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if (!source_desc || !obj_desc) {
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return_ACPI_STATUS(AE_AML_NO_OPERAND);
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}
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if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) {
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/*
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* If the buffer_field arguments have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
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status = acpi_ds_get_buffer_field_arguments(obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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} else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_SMBUS
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|| obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_GSBUS
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|| obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_IPMI)) {
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/*
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* This is an SMBus, GSBus or IPMI write. We will bypass the entire field
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* mechanism and handoff the buffer directly to the handler. For
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* these address spaces, the buffer is bi-directional; on a write,
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* return data is returned in the same buffer.
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*
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* Source must be a buffer of sufficient size:
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* ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE.
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*
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* Note: SMBus and GSBus protocol type is passed in upper 16-bits of Function
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*/
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if (source_desc->common.type != ACPI_TYPE_BUFFER) {
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ACPI_ERROR((AE_INFO,
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"SMBus/IPMI/GenericSerialBus write requires Buffer, found type %s",
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acpi_ut_get_object_type_name(source_desc)));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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if (obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_SMBUS) {
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length = ACPI_SMBUS_BUFFER_SIZE;
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function =
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ACPI_WRITE | (obj_desc->field.attribute << 16);
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} else if (obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_GSBUS) {
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accessor_type = obj_desc->field.attribute;
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length = acpi_ex_get_serial_access_length(accessor_type,
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obj_desc->
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field.
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access_length);
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/*
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* Add additional 2 bytes for the generic_serial_bus data buffer:
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*
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* Status; (Byte 0 of the data buffer)
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* Length; (Byte 1 of the data buffer)
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* Data[x-1]; (Bytes 2-x of the arbitrary length data buffer)
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*/
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length += 2;
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function = ACPI_WRITE | (accessor_type << 16);
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} else { /* IPMI */
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length = ACPI_IPMI_BUFFER_SIZE;
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function = ACPI_WRITE;
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}
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if (source_desc->buffer.length < length) {
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ACPI_ERROR((AE_INFO,
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"SMBus/IPMI/GenericSerialBus write requires Buffer of length %u, found length %u",
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length, source_desc->buffer.length));
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return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
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}
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/* Create the bi-directional buffer */
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buffer_desc = acpi_ut_create_buffer_object(length);
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if (!buffer_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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buffer = buffer_desc->buffer.pointer;
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ACPI_MEMCPY(buffer, source_desc->buffer.pointer, length);
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/*
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* Perform the write (returns status and perhaps data in the
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* same buffer)
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*/
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status = acpi_ex_access_region(obj_desc, 0,
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(u64 *) buffer, function);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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*result_desc = buffer_desc;
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return_ACPI_STATUS(status);
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} else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(obj_desc->field.region_obj->region.space_id ==
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ACPI_ADR_SPACE_GPIO)) {
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/*
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* For GPIO (general_purpose_io), we will bypass the entire field
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* mechanism and handoff the bit address and bit width directly to
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* the handler. The Address will be the bit offset
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* from the previous Connection() operator, making it effectively a
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* pin number index. The bit_length is the length of the field, which
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* is thus the number of pins.
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*/
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if (source_desc->common.type != ACPI_TYPE_INTEGER) {
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"GPIO FieldWrite [FROM]: (%s:%X), Val %.8X [TO]: Pin %u Bits %u\n",
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acpi_ut_get_type_name(source_desc->common.
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type),
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source_desc->common.type,
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(u32)source_desc->integer.value,
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obj_desc->field.pin_number_index,
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obj_desc->field.bit_length));
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buffer = &source_desc->integer.value;
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Perform the write */
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status = acpi_ex_access_region(obj_desc, 0,
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(u64 *)buffer, ACPI_WRITE);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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return_ACPI_STATUS(status);
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}
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/* Get a pointer to the data to be written */
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switch (source_desc->common.type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
|
|
buffer = &source_desc->integer.value;
|
|
length = sizeof(source_desc->integer.value);
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
buffer = source_desc->buffer.pointer;
|
|
length = source_desc->buffer.length;
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
|
|
buffer = source_desc->string.pointer;
|
|
length = source_desc->string.length;
|
|
break;
|
|
|
|
default:
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
|
|
"FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n",
|
|
source_desc,
|
|
acpi_ut_get_type_name(source_desc->common.type),
|
|
source_desc->common.type, buffer, length));
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
|
|
"FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n",
|
|
obj_desc,
|
|
acpi_ut_get_type_name(obj_desc->common.type),
|
|
obj_desc->common.type,
|
|
obj_desc->common_field.bit_length,
|
|
obj_desc->common_field.start_field_bit_offset,
|
|
obj_desc->common_field.base_byte_offset));
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
/* Write to the field */
|
|
|
|
status = acpi_ex_insert_into_field(obj_desc, buffer, length);
|
|
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|