diff options
Diffstat (limited to 'drivers/acpi/acpica/exfield.c')
| -rw-r--r-- | drivers/acpi/acpica/exfield.c | 364 |
1 files changed, 0 insertions, 364 deletions
diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c index f3e5e988e219..e5798f15793a 100644 --- a/drivers/acpi/acpica/exfield.c +++ b/drivers/acpi/acpica/exfield.c @@ -16,31 +16,12 @@ #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME("exfield") -/* Local prototypes */ -static acpi_status -acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc, - union acpi_operand_object **return_buffer); - -static 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); - -static acpi_status -acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer); - -static acpi_status -acpi_ex_write_gpio(union acpi_operand_object *source_desc, - union acpi_operand_object *obj_desc, - union acpi_operand_object **return_buffer); - /* * This table maps the various Attrib protocols to the byte transfer * length. Used for the generic serial bus. */ #define ACPI_INVALID_PROTOCOL_ID 0x80 #define ACPI_MAX_PROTOCOL_ID 0x0F - const u8 acpi_protocol_lengths[] = { ACPI_INVALID_PROTOCOL_ID, /* 0 - reserved */ ACPI_INVALID_PROTOCOL_ID, /* 1 - reserved */ @@ -343,348 +324,3 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, acpi_ex_release_global_lock(obj_desc->common_field.field_flags); return_ACPI_STATUS(status); } - -/******************************************************************************* - * - * FUNCTION: acpi_ex_read_gpio - * - * PARAMETERS: obj_desc - The named field to read - * buffer - Where the return data is returnd - * - * RETURN: Status - * - * DESCRIPTION: Read from a named field that references a Generic Serial Bus - * field - * - ******************************************************************************/ - -static 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. - * - ******************************************************************************/ - -static 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). - * - ******************************************************************************/ - -static 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). - * - ******************************************************************************/ - -static 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; - u32 data_length; - 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; - data_length = ACPI_SMBUS_DATA_SIZE; - function = ACPI_WRITE | (obj_desc->field.attribute << 16); - break; - - case ACPI_ADR_SPACE_IPMI: - - buffer_length = ACPI_IPMI_BUFFER_SIZE; - data_length = ACPI_IPMI_DATA_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; - data_length = source_desc->buffer.pointer[1]; - function = ACPI_WRITE | (accessor_type << 16); - break; - - default: - return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID); - } - -#if 0 - OBSOLETE ? - /* Check for possible buffer overflow */ - if (data_length > source_desc->buffer.length) { - ACPI_ERROR((AE_INFO, - "Length in buffer header (%u)(%u) is greater than " - "the physical buffer length (%u) and will overflow", - data_length, buffer_length, - source_desc->buffer.length)); - - return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); - } -#endif - - /* 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; - memcpy(buffer, source_desc->buffer.pointer, data_length); - - /* 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); -} |