ACPI 5.0: Support for GeneralPurposeIo and GenericSerialBus operation region

Signed-off-by: Bob Moore <[e-mail]>
Signed-off-by: Lin Ming <[e-mail]>
Signed-off-by: Len Brown <[e-mail]>

drivers/acpi/acpica/acconfig.h

···
 #define ACPI_RSDP_CHECKSUM_LENGTH       20
 #define ACPI_RSDP_XCHECKSUM_LENGTH      36
 
-/* SMBus and IPMI bidirectional buffer size */
+/* SMBus, GSBus and IPMI bidirectional buffer size */
 
 #define ACPI_SMBUS_BUFFER_SIZE          34
+#define ACPI_GSBUS_BUFFER_SIZE          34
 #define ACPI_IPMI_BUFFER_SIZE           66
 
 /* _sx_d and _sx_w control methods */

drivers/acpi/acpica/amlcode.h

···
  * access_as keyword
  */
 typedef enum {
-	AML_FIELD_ATTRIB_SMB_QUICK = 0x02,
-	AML_FIELD_ATTRIB_SMB_SEND_RCV = 0x04,
-	AML_FIELD_ATTRIB_SMB_BYTE = 0x06,
-	AML_FIELD_ATTRIB_SMB_WORD = 0x08,
-	AML_FIELD_ATTRIB_SMB_BLOCK = 0x0A,
-	AML_FIELD_ATTRIB_SMB_WORD_CALL = 0x0C,
-	AML_FIELD_ATTRIB_SMB_BLOCK_CALL = 0x0D
+	AML_FIELD_ATTRIB_QUICK = 0x02,
+	AML_FIELD_ATTRIB_SEND_RCV = 0x04,
+	AML_FIELD_ATTRIB_BYTE = 0x06,
+	AML_FIELD_ATTRIB_WORD = 0x08,
+	AML_FIELD_ATTRIB_BLOCK = 0x0A,
+	AML_FIELD_ATTRIB_MULTIBYTE = 0x0B,
+	AML_FIELD_ATTRIB_WORD_CALL = 0x0C,
+	AML_FIELD_ATTRIB_BLOCK_CALL = 0x0D,
+	AML_FIELD_ATTRIB_RAW_BYTES = 0x0E,
+	AML_FIELD_ATTRIB_RAW_PROCESS = 0x0F
 } AML_ACCESS_ATTRIBUTE;
 
 /* Bit fields in the AML method_flags byte */

drivers/acpi/acpica/exfield.c

···
 		   (obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_SMBUS
 		    || obj_desc->field.region_obj->region.space_id ==
+		    ACPI_ADR_SPACE_GSBUS
+		    || obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_IPMI)) {
 		/*
-		 * This is an SMBus or IPMI read. We must create a buffer to hold
+		 * 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 protocol value is passed in upper 16-bits of Function
+		 * Note: SMBus and GSBus protocol value is passed in upper 16-bits of Function
 		 */
 		if (obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_SMBUS) {
 			length = ACPI_SMBUS_BUFFER_SIZE;
+			function =
+			    ACPI_READ | (obj_desc->field.attribute << 16);
+		} else if (obj_desc->field.region_obj->region.space_id ==
+			   ACPI_ADR_SPACE_GSBUS) {
+			length = ACPI_GSBUS_BUFFER_SIZE;
 			function =
 			    ACPI_READ | (obj_desc->field.attribute << 16);
 		} else {	/* IPMI */
···
 		   (obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_SMBUS
 		    || obj_desc->field.region_obj->region.space_id ==
+		    ACPI_ADR_SPACE_GSBUS
+		    || obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_IPMI)) {
 		/*
-		 * This is an SMBus or IPMI write. We will bypass the entire field
+		 * 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 bi-directional; on a write,
 		 * return data is returned in the same buffer.
 		 *
 		 * Source must be a buffer of sufficient size:
-		 * ACPI_SMBUS_BUFFER_SIZE or ACPI_IPMI_BUFFER_SIZE.
+		 * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE.
 		 *
-		 * Note: SMBus protocol type is passed in upper 16-bits of Function
+		 * Note: SMBus and GSBus protocol type is passed in upper 16-bits of Function
 		 */
 		if (source_desc->common.type != ACPI_TYPE_BUFFER) {
 			ACPI_ERROR((AE_INFO,
-				    "SMBus or IPMI write requires Buffer, found type %s",
+				    "SMBus/IPMI/GenericSerialBus write requires Buffer, found type %s",
 				    acpi_ut_get_object_type_name(source_desc)));
 
 			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
···
 			length = ACPI_SMBUS_BUFFER_SIZE;
 			function =
 			    ACPI_WRITE | (obj_desc->field.attribute << 16);
+		} else if (obj_desc->field.region_obj->region.space_id ==
+			   ACPI_ADR_SPACE_GSBUS) {
+			length = ACPI_GSBUS_BUFFER_SIZE;
+			function =
+			    ACPI_WRITE | (obj_desc->field.attribute << 16);
 		} else {	/* IPMI */
 
 			length = ACPI_IPMI_BUFFER_SIZE;
···
 
 		if (source_desc->buffer.length < length) {
 			ACPI_ERROR((AE_INFO,
-				    "SMBus or IPMI write requires Buffer of length %u, found length %u",
+				    "SMBus/IPMI/GenericSerialBus write requires Buffer of length %u, found length %u",
 				    length, source_desc->buffer.length));
 
 			return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);

drivers/acpi/acpica/exfldio.c

···
 	}
 
 	/*
-	 * Exit now for SMBus or IPMI address space, it has a non-linear
+	 * Exit now for SMBus, GSBus or IPMI address space, it has a non-linear
 	 * address space and the request cannot be directly validated
 	 */
 	if (space_id == ACPI_ADR_SPACE_SMBUS ||
+	    space_id == ACPI_ADR_SPACE_GSBUS ||
 	    space_id == ACPI_ADR_SPACE_IPMI) {
 
 		/* SMBus or IPMI has a non-linear address space */

drivers/acpi/acpica/utdecode.c

···
 	"SMBus",
 	"SystemCMOS",
 	"PCIBARTarget",
-	"IPMI"
+	"IPMI",
+	"GeneralPurposeIo",
+	"GenericSerialBus"
 };
 
 char *acpi_ut_get_region_name(u8 space_id)

include/acpi/actypes.h

···
 #define ACPI_ADR_SPACE_CMOS             (acpi_adr_space_type) 5
 #define ACPI_ADR_SPACE_PCI_BAR_TARGET   (acpi_adr_space_type) 6
 #define ACPI_ADR_SPACE_IPMI             (acpi_adr_space_type) 7
+#define ACPI_ADR_SPACE_GPIO             (acpi_adr_space_type) 8
+#define ACPI_ADR_SPACE_GSBUS            (acpi_adr_space_type) 9
 
-#define ACPI_NUM_PREDEFINED_REGIONS     8
+#define ACPI_NUM_PREDEFINED_REGIONS     10
 
 /*
  * Special Address Spaces