2018-10-03 21:45:37 +03:00
|
|
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
|
|
/******************************************************************************
|
|
|
|
*
|
|
|
|
* Module Name: exserial - field_unit support for serial address spaces
|
|
|
|
*
|
2020-01-10 22:31:49 +03:00
|
|
|
* Copyright (C) 2000 - 2020, Intel Corp.
|
2018-10-03 21:45:37 +03:00
|
|
|
*
|
|
|
|
*****************************************************************************/
|
|
|
|
|
|
|
|
#include <acpi/acpi.h>
|
|
|
|
#include "accommon.h"
|
|
|
|
#include "acdispat.h"
|
|
|
|
#include "acinterp.h"
|
|
|
|
#include "amlcode.h"
|
|
|
|
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
|
|
ACPI_MODULE_NAME("exserial")
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_read_gpio
|
|
|
|
*
|
|
|
|
* PARAMETERS: obj_desc - The named field to read
|
2019-02-16 00:36:19 +03:00
|
|
|
* buffer - Where the return data is returned
|
2018-10-03 21:45:37 +03:00
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Read from a named field that references a Generic Serial Bus
|
|
|
|
* field
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_read_gpio, obj_desc);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* For GPIO (general_purpose_io), the Address will be the bit offset
|
|
|
|
* from the previous Connection() operator, making it effectively a
|
|
|
|
* pin number index. The bit_length is the length of the field, which
|
|
|
|
* is thus the number of pins.
|
|
|
|
*/
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
|
|
|
|
"GPIO FieldRead [FROM]: Pin %u Bits %u\n",
|
|
|
|
obj_desc->field.pin_number_index,
|
|
|
|
obj_desc->field.bit_length));
|
|
|
|
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
|
|
|
|
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
|
|
|
|
/* Perform the read */
|
|
|
|
|
|
|
|
status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, ACPI_READ);
|
|
|
|
|
|
|
|
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_write_gpio
|
|
|
|
*
|
|
|
|
* PARAMETERS: source_desc - Contains data to write. Expect to be
|
|
|
|
* an Integer object.
|
|
|
|
* obj_desc - The named field
|
|
|
|
* result_desc - Where the return value is returned, if any
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Write to a named field that references a General Purpose I/O
|
|
|
|
* field.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
acpi_status
|
|
|
|
acpi_ex_write_gpio(union acpi_operand_object *source_desc,
|
|
|
|
union acpi_operand_object *obj_desc,
|
|
|
|
union acpi_operand_object **return_buffer)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
void *buffer;
|
|
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_write_gpio, obj_desc);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* For GPIO (general_purpose_io), we will bypass the entire field
|
|
|
|
* mechanism and handoff the bit address and bit width directly to
|
|
|
|
* the handler. The Address will be the bit offset
|
|
|
|
* from the previous Connection() operator, making it effectively a
|
|
|
|
* pin number index. The bit_length is the length of the field, which
|
|
|
|
* is thus the number of pins.
|
|
|
|
*/
|
|
|
|
if (source_desc->common.type != ACPI_TYPE_INTEGER) {
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
|
|
}
|
|
|
|
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
|
|
|
|
"GPIO FieldWrite [FROM]: (%s:%X), Value %.8X [TO]: Pin %u Bits %u\n",
|
|
|
|
acpi_ut_get_type_name(source_desc->common.type),
|
|
|
|
source_desc->common.type,
|
|
|
|
(u32)source_desc->integer.value,
|
|
|
|
obj_desc->field.pin_number_index,
|
|
|
|
obj_desc->field.bit_length));
|
|
|
|
|
|
|
|
buffer = &source_desc->integer.value;
|
|
|
|
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
|
|
|
|
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
|
|
|
|
/* Perform the write */
|
|
|
|
|
|
|
|
status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, ACPI_WRITE);
|
|
|
|
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_read_serial_bus
|
|
|
|
*
|
|
|
|
* PARAMETERS: obj_desc - The named field to read
|
|
|
|
* return_buffer - Where the return value is returned, if any
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Read from a named field that references a serial bus
|
|
|
|
* (SMBus, IPMI, or GSBus).
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
acpi_status
|
|
|
|
acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
|
|
|
|
union acpi_operand_object **return_buffer)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
u32 buffer_length;
|
|
|
|
union acpi_operand_object *buffer_desc;
|
|
|
|
u32 function;
|
|
|
|
u16 accessor_type;
|
|
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_read_serial_bus, obj_desc);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is an SMBus, GSBus or IPMI read. We must create a buffer to
|
|
|
|
* hold the data and then directly access the region handler.
|
|
|
|
*
|
|
|
|
* Note: SMBus and GSBus protocol value is passed in upper 16-bits
|
|
|
|
* of Function
|
|
|
|
*
|
|
|
|
* Common buffer format:
|
|
|
|
* Status; (Byte 0 of the data buffer)
|
|
|
|
* Length; (Byte 1 of the data buffer)
|
|
|
|
* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
|
|
|
|
*/
|
|
|
|
switch (obj_desc->field.region_obj->region.space_id) {
|
|
|
|
case ACPI_ADR_SPACE_SMBUS:
|
|
|
|
|
|
|
|
buffer_length = ACPI_SMBUS_BUFFER_SIZE;
|
|
|
|
function = ACPI_READ | (obj_desc->field.attribute << 16);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_ADR_SPACE_IPMI:
|
|
|
|
|
|
|
|
buffer_length = ACPI_IPMI_BUFFER_SIZE;
|
|
|
|
function = ACPI_READ;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_ADR_SPACE_GSBUS:
|
|
|
|
|
|
|
|
accessor_type = obj_desc->field.attribute;
|
|
|
|
if (accessor_type == AML_FIELD_ATTRIB_RAW_PROCESS_BYTES) {
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
|
|
"Invalid direct read using bidirectional write-then-read protocol"));
|
|
|
|
|
|
|
|
return_ACPI_STATUS(AE_AML_PROTOCOL);
|
|
|
|
}
|
|
|
|
|
|
|
|
status =
|
|
|
|
acpi_ex_get_protocol_buffer_length(accessor_type,
|
|
|
|
&buffer_length);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
|
|
"Invalid protocol ID for GSBus: 0x%4.4X",
|
|
|
|
accessor_type));
|
|
|
|
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Add header length to get the full size of the buffer */
|
|
|
|
|
|
|
|
buffer_length += ACPI_SERIAL_HEADER_SIZE;
|
|
|
|
function = ACPI_READ | (accessor_type << 16);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Create the local transfer buffer that is returned to the caller */
|
|
|
|
|
|
|
|
buffer_desc = acpi_ut_create_buffer_object(buffer_length);
|
|
|
|
if (!buffer_desc) {
|
|
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
|
|
|
|
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
|
|
|
|
/* Call the region handler for the write-then-read */
|
|
|
|
|
|
|
|
status = acpi_ex_access_region(obj_desc, 0,
|
|
|
|
ACPI_CAST_PTR(u64,
|
|
|
|
buffer_desc->buffer.
|
|
|
|
pointer), function);
|
|
|
|
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
|
|
|
|
*return_buffer = buffer_desc;
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_write_serial_bus
|
|
|
|
*
|
|
|
|
* PARAMETERS: source_desc - Contains data to write
|
|
|
|
* obj_desc - The named field
|
|
|
|
* return_buffer - Where the return value is returned, if any
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Write to a named field that references a serial bus
|
|
|
|
* (SMBus, IPMI, GSBus).
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
acpi_status
|
|
|
|
acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
|
|
|
|
union acpi_operand_object *obj_desc,
|
|
|
|
union acpi_operand_object **return_buffer)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
u32 buffer_length;
|
2018-12-13 23:30:34 +03:00
|
|
|
u32 data_length;
|
2018-10-03 21:45:37 +03:00
|
|
|
void *buffer;
|
|
|
|
union acpi_operand_object *buffer_desc;
|
|
|
|
u32 function;
|
|
|
|
u16 accessor_type;
|
|
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_write_serial_bus, obj_desc);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is an SMBus, GSBus or IPMI write. We will bypass the entire
|
|
|
|
* field mechanism and handoff the buffer directly to the handler.
|
|
|
|
* For these address spaces, the buffer is bidirectional; on a
|
|
|
|
* write, return data is returned in the same buffer.
|
|
|
|
*
|
|
|
|
* Source must be a buffer of sufficient size, these are fixed size:
|
|
|
|
* ACPI_SMBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE.
|
|
|
|
*
|
|
|
|
* Note: SMBus and GSBus protocol type is passed in upper 16-bits
|
|
|
|
* of Function
|
|
|
|
*
|
|
|
|
* Common buffer format:
|
|
|
|
* Status; (Byte 0 of the data buffer)
|
|
|
|
* Length; (Byte 1 of the data buffer)
|
|
|
|
* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
|
|
|
|
*/
|
|
|
|
if (source_desc->common.type != ACPI_TYPE_BUFFER) {
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
|
|
"SMBus/IPMI/GenericSerialBus write requires "
|
|
|
|
"Buffer, found type %s",
|
|
|
|
acpi_ut_get_object_type_name(source_desc)));
|
|
|
|
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (obj_desc->field.region_obj->region.space_id) {
|
|
|
|
case ACPI_ADR_SPACE_SMBUS:
|
|
|
|
|
|
|
|
buffer_length = ACPI_SMBUS_BUFFER_SIZE;
|
|
|
|
function = ACPI_WRITE | (obj_desc->field.attribute << 16);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_ADR_SPACE_IPMI:
|
|
|
|
|
|
|
|
buffer_length = ACPI_IPMI_BUFFER_SIZE;
|
|
|
|
function = ACPI_WRITE;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_ADR_SPACE_GSBUS:
|
|
|
|
|
|
|
|
accessor_type = obj_desc->field.attribute;
|
|
|
|
status =
|
|
|
|
acpi_ex_get_protocol_buffer_length(accessor_type,
|
|
|
|
&buffer_length);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
|
|
"Invalid protocol ID for GSBus: 0x%4.4X",
|
|
|
|
accessor_type));
|
|
|
|
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Add header length to get the full size of the buffer */
|
|
|
|
|
|
|
|
buffer_length += ACPI_SERIAL_HEADER_SIZE;
|
|
|
|
function = ACPI_WRITE | (accessor_type << 16);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Create the transfer/bidirectional/return buffer */
|
|
|
|
|
|
|
|
buffer_desc = acpi_ut_create_buffer_object(buffer_length);
|
|
|
|
if (!buffer_desc) {
|
|
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy the input buffer data to the transfer buffer */
|
|
|
|
|
|
|
|
buffer = buffer_desc->buffer.pointer;
|
2018-12-13 23:30:34 +03:00
|
|
|
data_length = (buffer_length < source_desc->buffer.length ?
|
|
|
|
buffer_length : source_desc->buffer.length);
|
|
|
|
memcpy(buffer, source_desc->buffer.pointer, data_length);
|
2018-10-03 21:45:37 +03:00
|
|
|
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
|
|
|
|
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Perform the write (returns status and perhaps data in the
|
|
|
|
* same buffer)
|
|
|
|
*/
|
|
|
|
status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, function);
|
|
|
|
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
|
|
|
|
|
|
|
*return_buffer = buffer_desc;
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
}
|