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

ACPICA commit a06fdba686cefccd5dd5b93b52fa0f1e3f984906

ACPI 6.2 introduced a new resource that is used to specify fine-grained
configuration of a pin or set of pins used by a device. The ASL syntax of
this new resource looks like:

  PinConfig (Shared/Exclusive, PinConfigType, PinConfigValue,
             ResourceSource, ResourceSourceIndex, ResourceUsage,
             DescriptorName, Vendordata) {Pin List}

PinConfigType is an integer with following accepted values:

  0x00 (Default) - No configuration is applied to the pin
  0x01 (Bias Pull-up) - Pin is pulled up using certain size resistor
  0x02 (Bias Pull-down) - Pin is pulled down using certain size resistor
  0x03 (Bias Default) - Set to default biasing
  0x04 (Bias Disable) - All bias settings will be disabled
  0x05 (Bias High Impedance) - Configure the pin as hi_z
  0x06 (Bias Bus Hold) - Configure the pin in a weak latch state where
                         it drives the last value on a tristate bus
  0x07 (Drive Open Drain) - Configure the pin into open drain state
  0x08 (Drive Open Source) - Configure the pin into open source state
  0x09 (Drive Push Pull) - Configure the pin into push-pull state
  0x0a (Drive Strength) - How much the pin can supply current
  0x0b (Slew Rate) - Configure slew rate of the pin
  0x0c (Input Debounce) - Enable input debouncer for the pin
  0x0d (Input Schmitt Trigger) - Enable schmitt trigger for the pin
  0x0e - 0x7f - Reserved
  0x80 - 0xff - Vendor defined types

The PinConfigValue depends on the type and is expressed as units
suitable for that type (for example bias uses Ohms).

Link: https://github.com/acpica/acpica/commit/a06fdba6
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>

drivers/acpi/acpica/aclocal.h

@@ -1144,7 +1144,8 @@ struct acpi_port_info {
 #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
+#define ACPI_RESOURCE_NAME_PIN_CONFIG           0x8F
+#define ACPI_RESOURCE_NAME_LARGE_MAX            0x8F
 
 /*****************************************************************************
  *

drivers/acpi/acpica/acresrc.h

@@ -330,6 +330,7 @@ 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[];
+extern struct acpi_rsconvert_info acpi_rs_convert_pin_config[];
 
 /* These resources require separate get/set tables */
 
@@ -380,6 +381,7 @@ extern struct acpi_rsdump_info acpi_rs_dump_i2c_serial_bus[];
 extern struct acpi_rsdump_info acpi_rs_dump_spi_serial_bus[];
 extern struct acpi_rsdump_info acpi_rs_dump_uart_serial_bus[];
 extern struct acpi_rsdump_info acpi_rs_dump_general_flags[];
+extern struct acpi_rsdump_info acpi_rs_dump_pin_config[];
 #endif
 
 #endif				/* __ACRESRC_H__ */

drivers/acpi/acpica/acutils.h

@@ -85,6 +85,7 @@ extern const char *acpi_gbl_bpb_decode[];
 extern const char *acpi_gbl_sb_decode[];
 extern const char *acpi_gbl_fc_decode[];
 extern const char *acpi_gbl_pt_decode[];
+extern const char *acpi_gbl_ptyp_decode[];
 #endif
 
 /*

drivers/acpi/acpica/amlresrc.h

@@ -85,6 +85,8 @@
 #define ACPI_RESTAG_PHASE                       "_PHA"
 #define ACPI_RESTAG_PIN                         "_PIN"
 #define ACPI_RESTAG_PINCONFIG                   "_PPI"
+#define ACPI_RESTAG_PINCONFIG_TYPE              "_TYP"
+#define ACPI_RESTAG_PINCONFIG_VALUE             "_VAL"
 #define ACPI_RESTAG_POLARITY                    "_POL"
 #define ACPI_RESTAG_REGISTERBITOFFSET           "_RBO"
 #define ACPI_RESTAG_REGISTERBITWIDTH            "_RBW"
@@ -425,6 +427,26 @@ struct aml_resource_pin_function {
 
 #define AML_RESOURCE_PIN_FUNCTION_REVISION      1	/* ACPI 6.2 */
 
+struct aml_resource_pin_config {
+	AML_RESOURCE_LARGE_HEADER_COMMON u8 revision_id;
+	u16 flags;
+	u8 pin_config_type;
+	u32 pin_config_value;
+	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_CONFIG_REVISION      1	/* ACPI 6.2 */
+
 /* restore default alignment */
 
 #pragma pack()
@@ -468,6 +490,7 @@ union aml_resource {
 	struct aml_resource_uart_serialbus uart_serial_bus;
 	struct aml_resource_common_serialbus common_serial_bus;
 	struct aml_resource_pin_function pin_function;
+	struct aml_resource_pin_config pin_config;
 
 	/* Utility overlays */
 

drivers/acpi/acpica/rscalc.c

@@ -375,6 +375,20 @@ acpi_rs_get_aml_length(struct acpi_resource *resource,
 
 			break;
 
+		case ACPI_RESOURCE_TYPE_PIN_CONFIG:
+
+			total_size = (acpi_rs_length)(total_size +
+						      (resource->data.
+						       pin_config.
+						       pin_table_length * 2) +
+						      resource->data.pin_config.
+						      resource_source.
+						      string_length +
+						      resource->data.pin_config.
+						      vendor_length);
+
+			break;
+
 		default:
 
 			break;
@@ -581,6 +595,23 @@ acpi_rs_get_list_length(u8 *aml_buffer,
 			    minimum_aml_resource_length;
 			break;
 
+		case ACPI_RESOURCE_NAME_PIN_CONFIG:
+
+			/* Vendor data is optional */
+
+			if (aml_resource->pin_config.vendor_length) {
+				extra_struct_bytes +=
+				    aml_resource->pin_config.vendor_offset -
+				    aml_resource->pin_config.pin_table_offset +
+				    aml_resource->pin_config.vendor_length;
+			} else {
+				extra_struct_bytes +=
+				    aml_resource->large_header.resource_length +
+				    sizeof(struct aml_resource_large_header) -
+				    aml_resource->pin_config.pin_table_offset;
+			}
+			break;
+
 		default:
 
 			break;

drivers/acpi/acpica/rsdumpinfo.c

@@ -337,6 +337,31 @@ struct acpi_rsdump_info acpi_rs_dump_pin_function[10] = {
 	 "VendorData", NULL},
 };
 
+struct acpi_rsdump_info acpi_rs_dump_pin_config[11] = {
+	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_pin_config),
+	 "PinConfig", NULL},
+	{ACPI_RSD_UINT8, ACPI_RSD_OFFSET(pin_config.revision_id), "RevisionId",
+	 NULL},
+	{ACPI_RSD_1BITFLAG, ACPI_RSD_OFFSET(pin_config.producer_consumer),
+	 "ProducerConsumer", acpi_gbl_consume_decode},
+	{ACPI_RSD_1BITFLAG, ACPI_RSD_OFFSET(pin_config.sharable), "Sharing",
+	 acpi_gbl_shr_decode},
+	{ACPI_RSD_UINT8, ACPI_RSD_OFFSET(pin_config.pin_config_type),
+	 "PinConfigType", NULL},
+	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(pin_config.pin_config_value),
+	 "PinConfigValue", NULL},
+	{ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(pin_config.resource_source),
+	 "ResourceSource", NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(pin_config.pin_table_length),
+	 "PinTableLength", NULL},
+	{ACPI_RSD_WORDLIST, ACPI_RSD_OFFSET(pin_config.pin_table), "PinTable",
+	 NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(pin_config.vendor_length),
+	 "VendorLength", NULL},
+	{ACPI_RSD_SHORTLISTX, ACPI_RSD_OFFSET(pin_config.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},

drivers/acpi/acpica/rsinfo.c

@@ -81,6 +81,7 @@ struct acpi_rsconvert_info *acpi_gbl_set_resource_dispatch[] = {
 	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 */
+	acpi_rs_convert_pin_config,	/* 0x15, ACPI_RESOURCE_TYPE_PIN_CONFIG */
 };
 
 /* Dispatch tables for AML-to-resource (Get Resource) conversion functions */
@@ -122,6 +123,7 @@ struct acpi_rsconvert_info *acpi_gbl_get_resource_dispatch[] = {
 	acpi_rs_convert_gpio,	/* 0x0C, ACPI_RESOURCE_NAME_GPIO */
 	acpi_rs_convert_pin_function,	/* 0x0D, ACPI_RESOURCE_NAME_PIN_FUNCTION */
 	NULL,			/* 0x0E, ACPI_RESOURCE_NAME_SERIAL_BUS - Use subtype table below */
+	acpi_rs_convert_pin_config,	/* 0x0F, ACPI_RESOURCE_NAME_PIN_CONFIG */
 };
 
 /* Subtype table for serial_bus -- I2C, SPI, and UART */
@@ -159,6 +161,7 @@ struct acpi_rsdump_info *acpi_gbl_dump_resource_dispatch[] = {
 	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 */
+	acpi_rs_dump_pin_config,	/* ACPI_RESOURCE_TYPE_PIN_CONFIG */
 };
 
 struct acpi_rsdump_info *acpi_gbl_dump_serial_bus_dispatch[] = {
@@ -196,6 +199,7 @@ const u8 acpi_gbl_aml_resource_sizes[] = {
 	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 */
+	sizeof(struct aml_resource_pin_config),	/* ACPI_RESOURCE_TYPE_PIN_CONFIG */
 };
 
 const u8 acpi_gbl_resource_struct_sizes[] = {
@@ -234,7 +238,8 @@ const u8 acpi_gbl_resource_struct_sizes[] = {
 	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)
+	ACPI_RS_SIZE(struct acpi_resource_common_serialbus),
+	ACPI_RS_SIZE(struct acpi_resource_pin_config),
 };
 
 const u8 acpi_gbl_aml_resource_serial_bus_sizes[] = {

drivers/acpi/acpica/rsserial.c

@@ -534,3 +534,81 @@ struct acpi_rsconvert_info acpi_rs_convert_uart_serial_bus[23] = {
 	 AML_OFFSET(uart_serial_bus.default_baud_rate),
 	 1},
 };
+
+/*******************************************************************************
+ *
+ * acpi_rs_convert_pin_config
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_convert_pin_config[14] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_PIN_CONFIG,
+	 ACPI_RS_SIZE(struct acpi_resource_pin_config),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_pin_config)},
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_PIN_CONFIG,
+	 sizeof(struct aml_resource_pin_config),
+	 0},
+
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.pin_config.revision_id),
+	 AML_OFFSET(pin_config.revision_id),
+	 1},
+
+	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.pin_config.sharable),
+	 AML_OFFSET(pin_config.flags),
+	 0},
+
+	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.pin_config.producer_consumer),
+	 AML_OFFSET(pin_config.flags),
+	 1},
+
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.pin_config.pin_config_type),
+	 AML_OFFSET(pin_config.pin_config_type),
+	 1},
+
+	{ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.pin_config.pin_config_value),
+	 AML_OFFSET(pin_config.pin_config_value),
+	 1},
+
+	/* 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_config.pin_table_length),
+	 AML_OFFSET(pin_config.pin_table_offset),
+	 AML_OFFSET(pin_config.res_source_offset)},
+
+	{ACPI_RSC_MOVE_GPIO_PIN, ACPI_RS_OFFSET(data.pin_config.pin_table),
+	 AML_OFFSET(pin_config.pin_table_offset),
+	 0},
+
+	/* Resource Source */
+
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.pin_config.resource_source.index),
+	 AML_OFFSET(pin_config.res_source_index),
+	 1},
+
+	{ACPI_RSC_COUNT_GPIO_RES,
+	 ACPI_RS_OFFSET(data.pin_config.resource_source.string_length),
+	 AML_OFFSET(pin_config.res_source_offset),
+	 AML_OFFSET(pin_config.vendor_offset)},
+
+	{ACPI_RSC_MOVE_GPIO_RES,
+	 ACPI_RS_OFFSET(data.pin_config.resource_source.string_ptr),
+	 AML_OFFSET(pin_config.res_source_offset),
+	 0},
+
+	/* Vendor Data */
+
+	{ACPI_RSC_COUNT_GPIO_VEN, ACPI_RS_OFFSET(data.pin_config.vendor_length),
+	 AML_OFFSET(pin_config.vendor_length),
+	 1},
+
+	{ACPI_RSC_MOVE_GPIO_RES, ACPI_RS_OFFSET(data.pin_config.vendor_data),
+	 AML_OFFSET(pin_config.vendor_offset),
+	 0},
+};

drivers/acpi/acpica/utresrc.c

@@ -291,6 +291,25 @@ const char *acpi_gbl_pt_decode[] = {
 	"/* UNKNOWN parity keyword */"
 };
 
+/* pin_config type */
+
+const char *acpi_gbl_ptyp_decode[] = {
+	"Default",
+	"Bias Pull-up",
+	"Bias Pull-down",
+	"Bias Default",
+	"Bias Disable",
+	"Bias High Impedance",
+	"Bias Bus Hold",
+	"Drive Open Drain",
+	"Drive Open Source",
+	"Drive Push Pull",
+	"Drive Strength",
+	"Slew Rate",
+	"Input Debounce",
+	"Input Schmitt Trigger",
+};
+
 #endif
 
 /*
@@ -334,6 +353,7 @@ const u8 acpi_gbl_resource_aml_sizes[] = {
 	ACPI_AML_SIZE_LARGE(struct aml_resource_gpio),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_pin_function),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_common_serialbus),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_pin_config),
 };
 
 const u8 acpi_gbl_resource_aml_serial_bus_sizes[] = {
@@ -385,7 +405,8 @@ static const u8 acpi_gbl_resource_types[] = {
 	ACPI_FIXED_LENGTH,	/* 0B Extended* address */
 	ACPI_VARIABLE_LENGTH,	/* 0C Gpio* */
 	ACPI_VARIABLE_LENGTH,	/* 0D pin_function */
-	ACPI_VARIABLE_LENGTH	/* 0E *serial_bus */
+	ACPI_VARIABLE_LENGTH,	/* 0E *serial_bus */
+	ACPI_VARIABLE_LENGTH,	/* 0F pin_config */
 };
 
 /*******************************************************************************

include/acpi/acrestyp.h

@@ -546,6 +546,36 @@ struct acpi_resource_pin_function {
 	u8 *vendor_data;
 };
 
+struct acpi_resource_pin_config {
+	u8 revision_id;
+	u8 producer_consumer;	/* For values, see Producer/Consumer above */
+	u8 sharable;		/* For values, see Interrupt Attributes above */
+	u8 pin_config_type;
+	u32 pin_config_value;
+	u16 pin_table_length;
+	u16 vendor_length;
+	struct acpi_resource_source resource_source;
+	u16 *pin_table;
+	u8 *vendor_data;
+};
+
+/* Values for pin_config_type field above */
+
+#define ACPI_PIN_CONFIG_DEFAULT                 0
+#define ACPI_PIN_CONFIG_BIAS_PULL_UP            1
+#define ACPI_PIN_CONFIG_BIAS_PULL_DOWN          2
+#define ACPI_PIN_CONFIG_BIAS_DEFAULT            3
+#define ACPI_PIN_CONFIG_BIAS_DISABLE            4
+#define ACPI_PIN_CONFIG_BIAS_HIGH_IMPEDANCE     5
+#define ACPI_PIN_CONFIG_BIAS_BUS_HOLD           6
+#define ACPI_PIN_CONFIG_DRIVE_OPEN_DRAIN        7
+#define ACPI_PIN_CONFIG_DRIVE_OPEN_SOURCE       8
+#define ACPI_PIN_CONFIG_DRIVE_PUSH_PULL         9
+#define ACPI_PIN_CONFIG_DRIVE_STRENGTH          10
+#define ACPI_PIN_CONFIG_SLEW_RATE               11
+#define ACPI_PIN_CONFIG_INPUT_DEBOUNCE          12
+#define ACPI_PIN_CONFIG_INPUT_SCHMITT_TRIGGER   13
+
 /* ACPI_RESOURCE_TYPEs */
 
 #define ACPI_RESOURCE_TYPE_IRQ                  0
@@ -569,7 +599,8 @@ struct acpi_resource_pin_function {
 #define ACPI_RESOURCE_TYPE_FIXED_DMA            18	/* ACPI 5.0 */
 #define ACPI_RESOURCE_TYPE_SERIAL_BUS           19	/* ACPI 5.0 */
 #define ACPI_RESOURCE_TYPE_PIN_FUNCTION         20	/* ACPI 6.2 */
-#define ACPI_RESOURCE_TYPE_MAX                  20
+#define ACPI_RESOURCE_TYPE_PIN_CONFIG           21	/* ACPI 6.2 */
+#define ACPI_RESOURCE_TYPE_MAX                  21
 
 /* Master union for resource descriptors */
 
@@ -598,6 +629,7 @@ union acpi_resource_data {
 	struct acpi_resource_uart_serialbus uart_serial_bus;
 	struct acpi_resource_common_serialbus common_serial_bus;
 	struct acpi_resource_pin_function pin_function;
+	struct acpi_resource_pin_config pin_config;
 
 	/* Common fields */