ACPICA: ACPI 6.2: Add support for PinFunction() resource

ACPICA commit 6bbc6357f7061f1243601adde0ea45f7a89274e0

ACPI 6.2 introduced a new resource that is used to describe how certain
pins are muxed for a device. The ASL syntax of this new resource looks
like below:

  PinFunction(Shared, PinConfig, FunctionNumber, ResourceSource,
              ResourceSourceIndex, ResourceUsage, DescriptorName,
              VendorData) {Pin List}

Which is pretty similar to GpioIo()/GpioInt() resources.

Teach ACPICA about this new resource.

Link: https://github.com/acpica/acpica/commit/6bbc6357
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

8 files changed, 165 insertions, 3 deletions

diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index f63faa4c9d22..b73db9bdfa69 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -1142,6 +1142,7 @@ struct acpi_port_info {
 #define ACPI_RESOURCE_NAME_ADDRESS64            0x8A
 #define ACPI_RESOURCE_NAME_EXTENDED_ADDRESS64   0x8B
 #define ACPI_RESOURCE_NAME_GPIO                 0x8C
+#define ACPI_RESOURCE_NAME_PIN_FUNCTION         0x8D
 #define ACPI_RESOURCE_NAME_SERIAL_BUS           0x8E
 #define ACPI_RESOURCE_NAME_LARGE_MAX            0x8E
 
diff --git a/drivers/acpi/acpica/acresrc.h b/drivers/acpi/acpica/acresrc.h
index b4d22f6e48e2..bd238b410c42 100644
--- a/drivers/acpi/acpica/acresrc.h
+++ b/drivers/acpi/acpica/acresrc.h
@@ -329,6 +329,7 @@ extern struct acpi_rsconvert_info acpi_rs_convert_fixed_dma[];
 extern struct acpi_rsconvert_info acpi_rs_convert_i2c_serial_bus[];
 extern struct acpi_rsconvert_info acpi_rs_convert_spi_serial_bus[];
 extern struct acpi_rsconvert_info acpi_rs_convert_uart_serial_bus[];
+extern struct acpi_rsconvert_info acpi_rs_convert_pin_function[];
 
 /* These resources require separate get/set tables */
 
@@ -372,6 +373,7 @@ extern struct acpi_rsdump_info acpi_rs_dump_ext_address64[];
 extern struct acpi_rsdump_info acpi_rs_dump_ext_irq[];
 extern struct acpi_rsdump_info acpi_rs_dump_generic_reg[];
 extern struct acpi_rsdump_info acpi_rs_dump_gpio[];
+extern struct acpi_rsdump_info acpi_rs_dump_pin_function[];
 extern struct acpi_rsdump_info acpi_rs_dump_fixed_dma[];
 extern struct acpi_rsdump_info acpi_rs_dump_common_serial_bus[];
 extern struct acpi_rsdump_info acpi_rs_dump_i2c_serial_bus[];
diff --git a/drivers/acpi/acpica/amlresrc.h b/drivers/acpi/acpica/amlresrc.h
index 653a3d1ef5d5..e34396cab75d 100644
--- a/drivers/acpi/acpica/amlresrc.h
+++ b/drivers/acpi/acpica/amlresrc.h
@@ -65,6 +65,7 @@
 #define ACPI_RESTAG_DRIVESTRENGTH               "_DRS"
 #define ACPI_RESTAG_ENDIANNESS                  "_END"
 #define ACPI_RESTAG_FLOWCONTROL                 "_FLC"
+#define ACPI_RESTAG_FUNCTION                    "_FUN"
 #define ACPI_RESTAG_GRANULARITY                 "_GRA"
 #define ACPI_RESTAG_INTERRUPT                   "_INT"
 #define ACPI_RESTAG_INTERRUPTLEVEL              "_LL_"	/* active_lo(1), active_hi(0) */
@@ -404,6 +405,26 @@ struct aml_resource_uart_serialbus {
 #define AML_RESOURCE_UART_TYPE_REVISION         1	/* ACPI 5.0 */
 #define AML_RESOURCE_UART_MIN_DATA_LEN          10
 
+struct aml_resource_pin_function {
+	AML_RESOURCE_LARGE_HEADER_COMMON u8 revision_id;
+	u16 flags;
+	u8 pin_config;
+	u16 function_number;
+	u16 pin_table_offset;
+	u8 res_source_index;
+	u16 res_source_offset;
+	u16 vendor_offset;
+	u16 vendor_length;
+	/*
+	 * Optional fields follow immediately:
+	 * 1) PIN list (Words)
+	 * 2) Resource Source String
+	 * 3) Vendor Data bytes
+	 */
+};
+
+#define AML_RESOURCE_PIN_FUNCTION_REVISION      1	/* ACPI 6.2 */
+
 /* restore default alignment */
 
 #pragma pack()
@@ -446,6 +467,7 @@ union aml_resource {
 	struct aml_resource_spi_serialbus spi_serial_bus;
 	struct aml_resource_uart_serialbus uart_serial_bus;
 	struct aml_resource_common_serialbus common_serial_bus;
+	struct aml_resource_pin_function pin_function;
 
 	/* Utility overlays */
 
diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c
index 74e47f829ccb..167ece92fb55 100644
--- a/drivers/acpi/acpica/rscalc.c
+++ b/drivers/acpi/acpica/rscalc.c
@@ -340,6 +340,22 @@ acpi_rs_get_aml_length(struct acpi_resource *resource,
 
 			break;
 
+		case ACPI_RESOURCE_TYPE_PIN_FUNCTION:
+
+			total_size = (acpi_rs_length)(total_size +
+						      (resource->data.
+						       pin_function.
+						       pin_table_length * 2) +
+						      resource->data.
+						      pin_function.
+						      resource_source.
+						      string_length +
+						      resource->data.
+						      pin_function.
+						      vendor_length);
+
+			break;
+
 		case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 
 			total_size =
@@ -537,6 +553,24 @@ acpi_rs_get_list_length(u8 *aml_buffer,
 			}
 			break;
 
+		case ACPI_RESOURCE_NAME_PIN_FUNCTION:
+
+			/* Vendor data is optional */
+
+			if (aml_resource->pin_function.vendor_length) {
+				extra_struct_bytes +=
+				    aml_resource->pin_function.vendor_offset -
+				    aml_resource->pin_function.
+				    pin_table_offset +
+				    aml_resource->pin_function.vendor_length;
+			} else {
+				extra_struct_bytes +=
+				    aml_resource->large_header.resource_length +
+				    sizeof(struct aml_resource_large_header) -
+				    aml_resource->pin_function.pin_table_offset;
+			}
+			break;
+
 		case ACPI_RESOURCE_NAME_SERIAL_BUS:
 
 			minimum_aml_resource_length =
diff --git a/drivers/acpi/acpica/rsdumpinfo.c b/drivers/acpi/acpica/rsdumpinfo.c
index 8aacd28293fa..afc0441f7dfb 100644
--- a/drivers/acpi/acpica/rsdumpinfo.c
+++ b/drivers/acpi/acpica/rsdumpinfo.c
@@ -314,6 +314,29 @@ struct acpi_rsdump_info acpi_rs_dump_gpio[16] = {
 	 NULL},
 };
 
+struct acpi_rsdump_info acpi_rs_dump_pin_function[10] = {
+	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_pin_function),
+	 "PinFunction", NULL},
+	{ACPI_RSD_UINT8, ACPI_RSD_OFFSET(pin_function.revision_id),
+	 "RevisionId", NULL},
+	{ACPI_RSD_UINT8, ACPI_RSD_OFFSET(pin_function.pin_config), "PinConfig",
+	 acpi_gbl_ppc_decode},
+	{ACPI_RSD_1BITFLAG, ACPI_RSD_OFFSET(pin_function.sharable), "Sharing",
+	 acpi_gbl_shr_decode},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(pin_function.function_number),
+	 "FunctionNumber", NULL},
+	{ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(pin_function.resource_source),
+	 "ResourceSource", NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(pin_function.pin_table_length),
+	 "PinTableLength", NULL},
+	{ACPI_RSD_WORDLIST, ACPI_RSD_OFFSET(pin_function.pin_table), "PinTable",
+	 NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(pin_function.vendor_length),
+	 "VendorLength", NULL},
+	{ACPI_RSD_SHORTLISTX, ACPI_RSD_OFFSET(pin_function.vendor_data),
+	 "VendorData", NULL},
+};
+
 struct acpi_rsdump_info acpi_rs_dump_fixed_dma[4] = {
 	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_fixed_dma),
 	 "FixedDma", NULL},
diff --git a/drivers/acpi/acpica/rsinfo.c b/drivers/acpi/acpica/rsinfo.c
index 475da9d6aed5..e7310712b86f 100644
--- a/drivers/acpi/acpica/rsinfo.c
+++ b/drivers/acpi/acpica/rsinfo.c
@@ -80,6 +80,7 @@ struct acpi_rsconvert_info *acpi_gbl_set_resource_dispatch[] = {
 	acpi_rs_convert_gpio,	/* 0x11, ACPI_RESOURCE_TYPE_GPIO */
 	acpi_rs_convert_fixed_dma,	/* 0x12, ACPI_RESOURCE_TYPE_FIXED_DMA */
 	NULL,			/* 0x13, ACPI_RESOURCE_TYPE_SERIAL_BUS - Use subtype table below */
+	acpi_rs_convert_pin_function,	/* 0x14, ACPI_RESOURCE_TYPE_PIN_FUNCTION */
 };
 
 /* Dispatch tables for AML-to-resource (Get Resource) conversion functions */
@@ -119,7 +120,7 @@ struct acpi_rsconvert_info *acpi_gbl_get_resource_dispatch[] = {
 	acpi_rs_convert_address64,	/* 0x0A, ACPI_RESOURCE_NAME_ADDRESS64 */
 	acpi_rs_convert_ext_address64,	/* 0x0B, ACPI_RESOURCE_NAME_EXTENDED_ADDRESS64 */
 	acpi_rs_convert_gpio,	/* 0x0C, ACPI_RESOURCE_NAME_GPIO */
-	NULL,			/* 0x0D, Reserved */
+	acpi_rs_convert_pin_function,	/* 0x0D, ACPI_RESOURCE_NAME_PIN_FUNCTION */
 	NULL,			/* 0x0E, ACPI_RESOURCE_NAME_SERIAL_BUS - Use subtype table below */
 };
 
@@ -157,6 +158,7 @@ struct acpi_rsdump_info *acpi_gbl_dump_resource_dispatch[] = {
 	acpi_rs_dump_gpio,	/* ACPI_RESOURCE_TYPE_GPIO */
 	acpi_rs_dump_fixed_dma,	/* ACPI_RESOURCE_TYPE_FIXED_DMA */
 	NULL,			/* ACPI_RESOURCE_TYPE_SERIAL_BUS */
+	acpi_rs_dump_pin_function,	/* ACPI_RESOURCE_TYPE_PIN_FUNCTION */
 };
 
 struct acpi_rsdump_info *acpi_gbl_dump_serial_bus_dispatch[] = {
@@ -193,6 +195,7 @@ const u8 acpi_gbl_aml_resource_sizes[] = {
 	sizeof(struct aml_resource_gpio),	/* ACPI_RESOURCE_TYPE_GPIO */
 	sizeof(struct aml_resource_fixed_dma),	/* ACPI_RESOURCE_TYPE_FIXED_DMA */
 	sizeof(struct aml_resource_common_serialbus),	/* ACPI_RESOURCE_TYPE_SERIAL_BUS */
+	sizeof(struct aml_resource_pin_function),	/* ACPI_RESOURCE_TYPE_PIN_FUNCTION */
 };
 
 const u8 acpi_gbl_resource_struct_sizes[] = {
@@ -230,6 +233,7 @@ const u8 acpi_gbl_resource_struct_sizes[] = {
 	ACPI_RS_SIZE(struct acpi_resource_address64),
 	ACPI_RS_SIZE(struct acpi_resource_extended_address64),
 	ACPI_RS_SIZE(struct acpi_resource_gpio),
+	ACPI_RS_SIZE(struct acpi_resource_pin_function),
 	ACPI_RS_SIZE(struct acpi_resource_common_serialbus)
 };
 
diff --git a/drivers/acpi/acpica/rsserial.c b/drivers/acpi/acpica/rsserial.c
index c20e6d07928d..fd11d0c10c17 100644
--- a/drivers/acpi/acpica/rsserial.c
+++ b/drivers/acpi/acpica/rsserial.c
@@ -147,6 +147,82 @@ struct acpi_rsconvert_info acpi_rs_convert_gpio[18] = {
 
 /*******************************************************************************
  *
+ * acpi_rs_convert_pinfunction
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_convert_pin_function[13] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_PIN_FUNCTION,
+	 ACPI_RS_SIZE(struct acpi_resource_pin_function),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_pin_function)},
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_PIN_FUNCTION,
+	 sizeof(struct aml_resource_pin_function),
+	 0},
+
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.pin_function.revision_id),
+	 AML_OFFSET(pin_function.revision_id),
+	 1},
+
+	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.pin_function.sharable),
+	 AML_OFFSET(pin_function.flags),
+	 0},
+
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.pin_function.pin_config),
+	 AML_OFFSET(pin_function.pin_config),
+	 1},
+
+	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.pin_function.function_number),
+	 AML_OFFSET(pin_function.function_number),
+	 2},
+
+	/* Pin Table */
+
+	/*
+	 * It is OK to use GPIO operations here because none of them refer GPIO
+	 * structures directly but instead use offsets given here.
+	 */
+
+	{ACPI_RSC_COUNT_GPIO_PIN,
+	 ACPI_RS_OFFSET(data.pin_function.pin_table_length),
+	 AML_OFFSET(pin_function.pin_table_offset),
+	 AML_OFFSET(pin_function.res_source_offset)},
+
+	{ACPI_RSC_MOVE_GPIO_PIN, ACPI_RS_OFFSET(data.pin_function.pin_table),
+	 AML_OFFSET(pin_function.pin_table_offset),
+	 0},
+
+	/* Resource Source */
+
+	{ACPI_RSC_MOVE8,
+	 ACPI_RS_OFFSET(data.pin_function.resource_source.index),
+	 AML_OFFSET(pin_function.res_source_index),
+	 1},
+
+	{ACPI_RSC_COUNT_GPIO_RES,
+	 ACPI_RS_OFFSET(data.pin_function.resource_source.string_length),
+	 AML_OFFSET(pin_function.res_source_offset),
+	 AML_OFFSET(pin_function.vendor_offset)},
+
+	{ACPI_RSC_MOVE_GPIO_RES,
+	 ACPI_RS_OFFSET(data.pin_function.resource_source.string_ptr),
+	 AML_OFFSET(pin_function.res_source_offset),
+	 0},
+
+	/* Vendor Data */
+
+	{ACPI_RSC_COUNT_GPIO_VEN,
+	 ACPI_RS_OFFSET(data.pin_function.vendor_length),
+	 AML_OFFSET(pin_function.vendor_length),
+	 1},
+
+	{ACPI_RSC_MOVE_GPIO_RES, ACPI_RS_OFFSET(data.pin_function.vendor_data),
+	 AML_OFFSET(pin_function.vendor_offset),
+	 0},
+};
+
+/*******************************************************************************
+ *
  * acpi_rs_convert_i2c_serial_bus
  *
  ******************************************************************************/
diff --git a/drivers/acpi/acpica/utresrc.c b/drivers/acpi/acpica/utresrc.c
index e0587c85bafd..8dd09952b826 100644
--- a/drivers/acpi/acpica/utresrc.c
+++ b/drivers/acpi/acpica/utresrc.c
@@ -332,7 +332,7 @@ const u8 acpi_gbl_resource_aml_sizes[] = {
 	ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_gpio),
-	0,
+	ACPI_AML_SIZE_LARGE(struct aml_resource_pin_function),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_common_serialbus),
 };
 
@@ -384,7 +384,7 @@ static const u8 acpi_gbl_resource_types[] = {
 	ACPI_VARIABLE_LENGTH,	/* 0A Qword* address */
 	ACPI_FIXED_LENGTH,	/* 0B Extended* address */
 	ACPI_VARIABLE_LENGTH,	/* 0C Gpio* */
-	0,
+	ACPI_VARIABLE_LENGTH,	/* 0D pin_function */
 	ACPI_VARIABLE_LENGTH	/* 0E *serial_bus */
 };