@@ -33,6 +33,7 @@ struct {
{SCMI_PROTOCOL_ID_SENSOR, "Sensor management"},
{SCMI_PROTOCOL_ID_RESET_DOMAIN, "Reset domain management"},
{SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN, "Voltage domain management"},
+ {SCMI_PROTOCOL_ID_PIN_CONTROL, "Pin control"},
};
/**
@@ -41,3 +41,6 @@ config SCMI_AGENT_OPTEE
help
Enable the SCMI communication channel based on OP-TEE transport
for compatible "linaro,scmi-optee".
+
+config SCMI_PINCTRL
+ bool
@@ -4,4 +4,5 @@ obj-y += smt.o
obj-$(CONFIG_SCMI_AGENT_SMCCC) += smccc_agent.o
obj-$(CONFIG_SCMI_AGENT_MAILBOX) += mailbox_agent.o
obj-$(CONFIG_SCMI_AGENT_OPTEE) += optee_agent.o
+obj-$(CONFIG_SCMI_PINCTRL) += pinctrl.o
obj-$(CONFIG_SANDBOX) += sandbox-scmi_agent.o sandbox-scmi_devices.o
new file mode 100644
@@ -0,0 +1,412 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * SCMI Pin control protocol as U-Boot device
+ *
+ * Copyright (C) 2023 Linaro Limited
+ * author: AKASHI Takahiro <takahiro.akashi@linaro.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <malloc.h>
+#include <scmi_agent.h>
+#include <scmi_protocols.h>
+#include <string.h>
+#include <asm/types.h>
+#include <dm/device_compat.h>
+#include <linux/kernel.h>
+
+/**
+ * struct scmi_pinctrl_priv - Private data for SCMI Pin control protocol
+ * @channel: Reference to the SCMI channel to use
+ */
+struct scmi_pinctrl_priv {
+ struct scmi_channel *channel;
+};
+
+int scmi_pinctrl_protocol_attrs(struct udevice *dev, u32 *num_pins,
+ u32 *num_groups, u32 *num_functions)
+{
+ struct scmi_pinctrl_protocol_attrs_out out;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PROTOCOL_ATTRIBUTES,
+ .out_msg = (u8 *)&out,
+ .out_msg_sz = sizeof(out),
+ };
+ int ret;
+
+ if (!dev || !num_pins || !num_groups || !num_functions)
+ return -EINVAL;
+
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (out.status)
+ return scmi_to_linux_errno(out.status);
+
+ *num_groups = SCMI_PINCTRL_ATTRS_NUM_GROUPS(out.attributes_low);
+ *num_pins = SCMI_PINCTRL_ATTRS_NUM_PINS(out.attributes_low);
+ *num_functions = SCMI_PINCTRL_ATTRS_NUM_FUNCTIONS(out.attributes_high);
+
+ return 0;
+}
+
+int scmi_pinctrl_attrs(struct udevice *dev, u32 id, u32 flags,
+ bool *extended_name, u8 **name)
+{
+ struct scmi_pinctrl_attrs_in in;
+ struct scmi_pinctrl_attrs_out out;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_ATTRIBUTES,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&out,
+ .out_msg_sz = sizeof(out),
+ };
+ int ret;
+
+ if (!dev || !extended_name || !name)
+ return -EINVAL;
+
+ in.id = id;
+ in.flags = flags;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (out.status)
+ return scmi_to_linux_errno(out.status);
+
+ *extended_name = SCMI_PINCTRL_ATTRS_EXTENDED_NAME(out.attributes);
+ *name = strdup(out.name);
+ if (!*name)
+ return -ENOMEM;
+
+ return 0;
+}
+
+int scmi_pinctrl_list_assocs(struct udevice *dev, u32 id, u32 flags,
+ u16 **array)
+{
+ struct scmi_pinctrl_list_assocs_in in;
+ struct scmi_pinctrl_list_assocs_out out;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_LIST_ASSOCIATIONS,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&out,
+ .out_msg_sz = sizeof(out),
+ };
+ u32 index;
+ u16 *buf;
+ int i, ret;
+
+ if (!dev || !array)
+ return -EINVAL;
+
+ in.id = id;
+ in.flags = flags;
+
+ buf = calloc(sizeof(u16), SCMI_PINCTRL_ARRAY_SIZE);
+ if (!buf)
+ return -ENOMEM;
+
+ index = 0;
+ while (1) {
+ in.index = index;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ goto err;
+ if (out.status) {
+ ret = scmi_to_linux_errno(out.status);
+ goto err;
+ }
+
+ for (i = 0; i < SCMI_PINCTRL_LIST_NUM_PINGROUP(out.flags);
+ i++, index++)
+ buf[index] = out.array[i];
+
+ /* realloc should happen only once */
+ if (SCMI_PINCTRL_LIST_NUM_REMAINING(out.flags)) {
+ buf = realloc(buf, sizeof(u16) *
+ (SCMI_PINCTRL_ARRAY_SIZE
+ + SCMI_PINCTRL_LIST_NUM_REMAINING(out.flags)));
+ if (!buf)
+ return -ENOMEM;
+ } else {
+ break;
+ }
+ }
+
+ *array = buf;
+
+ return index;
+err:
+ free(buf);
+
+ return ret;
+}
+
+int scmi_pinctrl_config_get(struct udevice *dev, u32 id, bool all_configs,
+ int selector, unsigned int config_type,
+ struct scmi_pin_entry **configs)
+
+{
+ struct scmi_pinctrl_config_get_in in;
+ struct scmi_pinctrl_config_get_out out;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_CONFIG_GET,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&out,
+ .out_msg_sz = sizeof(out),
+ };
+ struct scmi_pin_entry *entry;
+ int cur, num, remaining, ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ if (!all_configs) {
+ in.id = id;
+ in.attributes = SCMI_PINCTRL_CONFIG_GET_ATTRS(0, selector, 0,
+ config_type);
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (out.status)
+ return scmi_to_linux_errno(out.status);
+
+ entry = malloc(sizeof(*entry));
+ if (!entry)
+ return -ENOMEM;
+
+ *entry = out.configs[0];
+ *configs = entry;
+
+ return 0;
+ }
+
+ entry = NULL;
+ cur = 0;
+ while (1) {
+ in.id = id;
+ in.attributes = SCMI_PINCTRL_CONFIG_GET_ATTRS(1, selector, cur,
+ 0);
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (out.status)
+ return scmi_to_linux_errno(out.status);
+
+ num = SCMI_PINCTRL_CONFIG_GET_NUM_RET(out.num_configs);
+ remaining = SCMI_PINCTRL_CONFIG_GET_REMAINING(out.num_configs);
+
+ if (!entry)
+ entry = malloc(sizeof(*entry) * (num + remaining));
+ if (!entry)
+ return -ENOMEM;
+
+ memcpy(entry + cur, &out.configs, sizeof(*entry) * num);
+
+ if (!remaining)
+ break;
+
+ cur += num;
+ }
+
+ return 0;
+}
+
+int scmi_pinctrl_config_set(struct udevice *dev, u32 id, int selector,
+ int num_configs, struct scmi_pin_entry *configs)
+{
+ s32 status;
+ struct scmi_pinctrl_config_set_in in;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_CONFIG_SET,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&status,
+ .out_msg_sz = sizeof(status),
+ };
+ int cur, num, ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ cur = 0;
+ while (num_configs) {
+ if (num_configs < SCMI_PINCTRL_CONFIG_ENTRY_MAX)
+ num = num_configs;
+ else
+ num = SCMI_PINCTRL_CONFIG_ENTRY_MAX;
+
+ in.id = id;
+ in.attributes = SCMI_PINCTRL_CONFIG_SET_ATTRS(num, selector);
+ memcpy(&in.configs[cur], configs,
+ sizeof(struct scmi_pin_entry) * num);
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (status)
+ return scmi_to_linux_errno(status);
+
+ num_configs -= num;
+ cur += num;
+ }
+
+ return 0;
+}
+
+int scmi_pinctrl_function_select(struct udevice *dev, u32 id, u32 function_id,
+ u32 flags)
+{
+ s32 status;
+ struct scmi_pinctrl_function_select_in in;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_FUNCTION_SELECT,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&status,
+ .out_msg_sz = sizeof(status),
+ };
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ in.id = id;
+ in.function_id = function_id;
+ in.flags = flags;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (status)
+ return scmi_to_linux_errno(status);
+
+ return 0;
+}
+
+int scmi_pinctrl_request(struct udevice *dev, u32 id, u32 flags)
+{
+ s32 status;
+ struct scmi_pinctrl_request_in in;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_REQUEST,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&status,
+ .out_msg_sz = sizeof(status),
+ };
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ in.id = id;
+ in.flags = flags;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (status)
+ return scmi_to_linux_errno(status);
+
+ return 0;
+}
+
+int scmi_pinctrl_release(struct udevice *dev, u32 id, u32 flags)
+{
+ s32 status;
+ struct scmi_pinctrl_release_in in;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_RELEASE,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&status,
+ .out_msg_sz = sizeof(status),
+ };
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ in.id = id;
+ in.flags = flags;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (status)
+ return scmi_to_linux_errno(status);
+
+ return 0;
+}
+
+int scmi_pinctrl_name_get(struct udevice *dev, u32 id, u32 flags, u8 **name)
+{
+ struct scmi_pinctrl_name_get_in in;
+ struct scmi_pinctrl_name_get_out out;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_NAME_GET,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&out,
+ .out_msg_sz = sizeof(out),
+ };
+ int ret;
+
+ if (!dev || !name)
+ return -EINVAL;
+
+ in.id = id;
+ in.flags = flags;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (out.status)
+ return scmi_to_linux_errno(out.status);
+
+ *name = strdup(out.name);
+ if (!*name)
+ return -ENOMEM;
+
+ return 0;
+}
+
+int scmi_pinctrl_set_permissions(struct udevice *dev, u32 agent_id, u32 id,
+ u32 flags)
+{
+ s32 status;
+ struct scmi_pinctrl_set_permissions_in in;
+ struct scmi_msg msg = {
+ .protocol_id = SCMI_PROTOCOL_ID_PIN_CONTROL,
+ .message_id = SCMI_PINCTRL_SET_PERMISSIONS,
+ .in_msg = (u8 *)&in,
+ .in_msg_sz = sizeof(in),
+ .out_msg = (u8 *)&status,
+ .out_msg_sz = sizeof(status),
+ };
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ in.agent_id = agent_id;
+ in.id = id;
+ in.flags = flags;
+ ret = devm_scmi_process_msg(dev, &msg);
+ if (ret)
+ return ret;
+ if (status)
+ return scmi_to_linux_errno(status);
+
+ return 0;
+}
@@ -95,6 +95,9 @@ struct udevice *scmi_get_protocol(struct udevice *dev,
case SCMI_PROTOCOL_ID_CLOCK:
proto = priv->clock_dev;
break;
+ case SCMI_PROTOCOL_ID_PIN_CONTROL:
+ proto = priv->pinctrl_dev;
+ break;
case SCMI_PROTOCOL_ID_RESET_DOMAIN:
proto = priv->resetdom_dev;
break;
@@ -142,6 +145,9 @@ static int scmi_add_protocol(struct udevice *dev,
case SCMI_PROTOCOL_ID_CLOCK:
priv->clock_dev = proto;
break;
+ case SCMI_PROTOCOL_ID_PIN_CONTROL:
+ priv->pinctrl_dev = proto;
+ break;
case SCMI_PROTOCOL_ID_RESET_DOMAIN:
priv->resetdom_dev = proto;
break;
@@ -414,6 +420,11 @@ static int scmi_bind_protocols(struct udevice *dev)
scmi_protocol_is_supported(dev, protocol_id))
drv = DM_DRIVER_GET(scmi_clock);
break;
+ case SCMI_PROTOCOL_ID_PIN_CONTROL:
+ if (IS_ENABLED(CONFIG_PINCTRL_SCMI) &&
+ scmi_protocol_is_supported(dev, protocol_id))
+ drv = DM_DRIVER_GET(scmi_pinctrl);
+ break;
case SCMI_PROTOCOL_ID_RESET_DOMAIN:
if (IS_ENABLED(CONFIG_RESET_SCMI) &&
scmi_protocol_is_supported(dev, protocol_id))
@@ -25,6 +25,7 @@ struct scmi_channel;
* @base_dev: SCMI base protocol device
* @clock_dev: SCMI clock protocol device
* @resetdom_dev: SCMI reset domain protocol device
+ * @pinctrl_dev: SCMI pin control protocol device
* @voltagedom_dev: SCMI voltage domain protocol device
*/
struct scmi_agent_priv {
@@ -40,6 +41,7 @@ struct scmi_agent_priv {
struct udevice *base_dev;
struct udevice *clock_dev;
struct udevice *resetdom_dev;
+ struct udevice *pinctrl_dev;
struct udevice *voltagedom_dev;
};
@@ -24,6 +24,7 @@ enum scmi_std_protocol {
SCMI_PROTOCOL_ID_SENSOR = 0x15,
SCMI_PROTOCOL_ID_RESET_DOMAIN = 0x16,
SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN = 0x17,
+ SCMI_PROTOCOL_ID_PIN_CONTROL = 0x19,
};
enum scmi_status_code {
@@ -683,4 +684,438 @@ struct scmi_voltd_level_get_out {
s32 voltage_level;
};
+/*
+ * SCMI Pin Control Protocol
+ */
+#define SCMI_PIN_CONTROL_PROTOCOL_VERSION 0x10000
+
+enum scmi_pin_control_id {
+ SCMI_PINCTRL_ATTRIBUTES = 0x3,
+ SCMI_PINCTRL_LIST_ASSOCIATIONS = 0x4,
+ SCMI_PINCTRL_CONFIG_GET = 0x5,
+ SCMI_PINCTRL_CONFIG_SET = 0x6,
+ SCMI_PINCTRL_FUNCTION_SELECT = 0x7,
+ SCMI_PINCTRL_REQUEST = 0x8,
+ SCMI_PINCTRL_RELEASE = 0x9,
+ SCMI_PINCTRL_NAME_GET = 0xa,
+ SCMI_PINCTRL_SET_PERMISSIONS = 0xb,
+};
+
+#define SCMI_PINCTRL_NAME_LENGTH_MAX 16
+
+/**
+ * struct scmi_pinctrl_protocol_attrs_out - Response for PINCTRL's
+ * PROTOCOL_ATTRIBUTES command
+ * @status: SCMI command status
+ * @attributes_low: Protocol attributes (lower bytes)
+ * @attributes_high: Protocol attributes (higher bytes)
+ */
+struct scmi_pinctrl_protocol_attrs_out {
+ s32 status;
+ u32 attributes_low;
+ u32 attributes_high;
+};
+
+#define SCMI_PINCTRL_ATTRS_NUM_GROUPS(attributes_low) \
+ (((attributes_low) & GENMASK(31, 16)) >> 16)
+#define SCMI_PINCTRL_ATTRS_NUM_PINS(attributes_low) \
+ ((attributes_low) & GENMASK(15, 0))
+#define SCMI_PINCTRL_ATTRS_NUM_FUNCTIONS(attributes_high) \
+ ((attributes_high) & GENMASK(15, 0))
+
+/**
+ * struct scmi_pinctrl_attrs_in - Message payload for
+ * SCMI_PINCTRL_ATTRIBUTES command
+ * @id: Identifier of pin, group or function
+ * @flags: A set of flags
+ */
+struct scmi_pinctrl_attrs_in {
+ u32 id;
+ u32 flags;
+};
+
+/**
+ * struct scmi_pinctrl_attrs_out - Response payload for
+ * SCMI_PINCTRL_ATTRIBUTES command
+ * @status: SCMI command status
+ * @attributes: Attributes of pin, group for function
+ * @name: Name of pin, group or function
+ */
+struct scmi_pinctrl_attrs_out {
+ u32 status;
+ u32 attributes;
+ u8 name[SCMI_PINCTRL_NAME_LENGTH_MAX];
+};
+
+#define SCMI_PINCTRL_TYPE(flags) ((flags) & GENMASK(1, 0))
+#define SCMI_PINCTRL_TYPE_PIN 0x0
+#define SCMI_PINCTRL_TYPE_GROUP 0x1
+#define SCMI_PINCTRL_TYPE_FUNCTION 0x2
+
+#define SCMI_PINCTRL_ATTRS_EXTENDED_NAME(attributes) \
+ ((attributes) & BIT(31))
+#define SCMI_PINCTRL_ATTRS_NUM_PINGROUP(attributes) \
+ ((attributes) & GENMASK(15, 0))
+
+/**
+ * struct scmi_pinctrl_list_assocs_in - Message payload for
+ * SCMI_PINCTRL_LIST_ASSOCIATIONS command
+ * @id: Identifier of group or function
+ * @flags: A set of flags
+ * @index: Index of first group to be described
+ */
+struct scmi_pinctrl_list_assocs_in {
+ u32 id;
+ u32 flags;
+ u32 index;
+};
+
+#define SCMI_PINCTRL_ARRAY_SIZE 8
+
+/**
+ * struct scmi_pinctrl_list_assocs_out - Response payload for
+ * SCMI_PINCTRL_LIST_ASSOCIATIONS command
+ * @status: SCMI command status
+ * @attributes: A set of flags
+ * @array: Array of pin or group identifiers
+ */
+struct scmi_pinctrl_list_assocs_out {
+ u32 status;
+ u32 flags;
+ u16 array[SCMI_PINCTRL_ARRAY_SIZE];
+};
+
+#define SCMI_PINCTRL_LIST_NUM_REMAINING(flags) \
+ (((flags) & GENMASK(31, 16)) >> 16)
+#define SCMI_PINCTRL_LIST_NUM_PINGROUP(flags) \
+ ((flags) & GENMASK(11, 0))
+
+/* FIXME: depends on transport */
+#define SCMI_PINCTRL_CONFIG_ENTRY_MAX 8
+
+struct scmi_pin_entry {
+ u32 type;
+ u32 value;
+};
+
+/**
+ * struct scmi_pinctrl_config_get_in - Message payload for
+ * SCMI_PINCTRL_CONFIG_GET command
+ * @id: Identifier of pin or group
+ * @attributes: Configuration attributes
+ */
+struct scmi_pinctrl_config_get_in {
+ u32 id;
+ u32 attributes;
+};
+
+#define SCMI_PINCTRL_CONFIG_GET_ATTRS(all, selector, skip, type) \
+ (((all) << 18) | ((selector) << 16) | \
+ (((skip) << 8) | (type)))
+
+#define SCMI_PINCTRL_CONFIG_GET_ALL BIT(18)
+#define SCMI_PINCTRL_CONFIG_GET_PINCTRL_TYPE(attributes) \
+ (((attributes) & GENMASK(17, 16)) >> 16)
+#define SCMI_PINCTRL_CONFIG_GET_SKIP(attributes) \
+ (((attributes) & GENMASK(15, 8)) >> 8)
+#define SCMI_PINCTRL_CONFIG_GET_TYPE(attributes) \
+ ((attributes) & GENMASK(7, 0))
+
+/**
+ * struct scmi_pinctrl_confige_get_out - Response payload for
+ * SCMI_PINCTRL_CONFIG_GET command
+ * @status: SCMI command status
+ * @num_configs: Number of configuration types
+ * @configs: Values of configuration types
+ */
+struct scmi_pinctrl_config_get_out {
+ u32 status;
+ u32 num_configs;
+ struct scmi_pin_entry configs[SCMI_PINCTRL_CONFIG_ENTRY_MAX];
+};
+
+#define SCMI_PINCTRL_CONFIG_GET_REMAINING(attributes) \
+ (((attributes) & GENMASK(31, 24)) >> 24)
+#define SCMI_PINCTRL_CONFIG_GET_NUM_RET(attributes) \
+ ((attributes) & GENMASK(7, 0))
+#define SCMI_PINCTRL_CONFIG_GET_NUM_CONFIGS(remaining, num) \
+ (((remaining) << 24) | (num))
+
+#define SCMI_PINCTRL_CONFIG_ID_SHIFT 8
+
+#define SCMI_PINCTRL_CONFIG_DEFAULT 0
+#define SCMI_PINCTRL_CONFIG_BIAS_BUS_HOLD 1
+#define SCMI_PINCTRL_CONFIG_BIAS_DISABLE 2
+#define SCMI_PINCTRL_CONFIG_BIAS_HI_IMPEDANCE 3
+#define SCMI_PINCTRL_CONFIG_BIAS_PULL_UP 4
+#define SCMI_PINCTRL_CONFIG_BIAS_PULL_DEF 5
+#define SCMI_PINCTRL_CONFIG_BIAS_PULL_DOWN 6
+#define SCMI_PINCTRL_CONFIG_DRIVE_OPEN_DRAIN 7
+#define SCMI_PINCTRL_CONFIG_DRIVE_OPEN_SOURCE 8
+#define SCMI_PINCTRL_CONFIG_DRIVE_PUSH_PULL 9
+#define SCMI_PINCTRL_CONFIG_DRIVE_STRENGTH 10
+#define SCMI_PINCTRL_CONFIG_INPUT_DEBOUNCE 11
+#define SCMI_PINCTRL_CONFIG_INPUT_MODE 12
+#define SCMI_PINCTRL_CONFIG_PULL_MODE 13
+#define SCMI_PINCTRL_CONFIG_INPUT_VALUE 14
+#define SCMI_PINCTRL_CONFIG_INPUT_SCHMITT 15
+#define SCMI_PINCTRL_CONFIG_LOW_POWER_MODE 16
+#define SCMI_PINCTRL_CONFIG_OUTPUT_MODE 17
+#define SCMI_PINCTRL_CONFIG_OUTPUT_VALUE 18
+#define SCMI_PINCTRL_CONFIG_POWER_SOURCE 19
+#define SCMI_PINCTRL_CONFIG_SLEW_RATE 20
+#define SCMI_PINCTRL_CONFIG_RESERVED 21
+#define SCMI_PINCTRL_CONFIG_OEM 192
+
+/**
+ * struct scmi_pinctrl_config_set_in - Message payload for
+ * SCMI_PINCTRL_CONFIG_GET command
+ * @id: Identifier of pin or group
+ * @attributes: Configuration attributes
+ * @configs: Values of configuration types
+ */
+struct scmi_pinctrl_config_set_in {
+ u32 id;
+ u32 attributes;
+ struct scmi_pin_entry configs[SCMI_PINCTRL_CONFIG_ENTRY_MAX];
+};
+
+#define SCMI_PINCTRL_CONFIG_SET_ATTRS(num, type) \
+ (((num) << 2) | (type))
+#define SCMI_PINCTRL_CONFIG_SET_NUM_CONFIGS(attributes) \
+ (((attributes) & GENMASK(9, 2)) >> 2)
+#define SCMI_PINCTRL_CONFIG_SET_PINCTRL_TYPE(attributes) \
+ ((attributes) & GENMASK(1, 0))
+
+/**
+ * struct scmi_pinctrl_function_select_in - Message payload for
+ * SCMI_PINCTRL_FUNCTION_SELECT command
+ * @id: Identifier of pin or group
+ * @function_id: Identifier of function
+ * @flags: A set of flags
+ */
+struct scmi_pinctrl_function_select_in {
+ u32 id;
+ u32 function_id;
+ u32 flags;
+};
+
+/**
+ * struct scmi_pinctrl_request_in - Message payload for
+ * SCMI_PINCTRL_REQUEST command
+ * @id: Identifier of pin or group
+ * @flags: A set of flags
+ */
+struct scmi_pinctrl_request_in {
+ u32 id;
+ u32 flags;
+};
+
+/**
+ * struct scmi_pinctrl_release_in - Message payload for
+ * SCMI_PINCTRL_RELEASE command
+ * @id: Identifier of pin or group
+ * @flags: A set of flags
+ */
+struct scmi_pinctrl_release_in {
+ u32 id;
+ u32 flags;
+};
+
+/**
+ * struct scmi_pinctrl_name_get_in - Message payload for
+ * SCMI_PINCTRL_NAME_GET command
+ * @id: Identifier of pin, group or function
+ * @flags: A set of flags
+ */
+struct scmi_pinctrl_name_get_in {
+ u32 id;
+ u32 flags;
+};
+
+/**
+ * struct scmi_pinctrl_name_get_out - Response payload for
+ * SCMI_PINCTRL_NAME_GET command
+ * @status: SCMI command status
+ * @flags: A set of flags (reserved)
+ * @name: Name in string
+ */
+struct scmi_pinctrl_name_get_out {
+ u32 status;
+ u32 flags;
+ u8 name[64];
+};
+
+/**
+ * struct scmi_pinctrl_set_permissions_in - Message payload for
+ * SCMI_PINCTRL_SET_PERMISSIONS command
+ * @agent_id: Identifier of the agent
+ * @id: Identifier of pin or group
+ * @flags: A set of flags
+ */
+struct scmi_pinctrl_set_permissions_in {
+ u32 agent_id;
+ u32 id;
+ u32 flags;
+};
+
+#define SCMI_PINCTRL_PERMISSION BIT(2)
+
+/**
+ * scmi_pinctrl_protocol_attrs - get attributes of pinctrl protocol
+ * @dev: SCMI pinctrl device
+ * @num_pins: A number of pins
+ * @num_groups: A number of groups
+ * @num_functions: A number of functions
+ *
+ * Get a number of available pins, groups and functions, respectively,
+ * in @num_pins, @num_groups, @num_functions.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_protocol_attrs(struct udevice *dev, u32 *num_pins,
+ u32 *num_groups, u32 *num_functions);
+
+/**
+ * scmi_pinctrl_attrs - get attributes of pin, group or function
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin, group or function
+ * @flags: A set of flags
+ * @extended_name: Bit flag for extended name
+ * @name: Name of pin, group or function
+ *
+ * Get the name of @id in @name.
+ * @flags can be SCMI_PINCTRL_TYPE_PIN, GROUP or FUNCTION.
+ * If @id has an extended name, @extended_name is set to true.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_attrs(struct udevice *dev, u32 id, u32 flags,
+ bool *extended_name, u8 **name);
+
+/**
+ * scmi_pinctrl_list_assocs - Get a list of pins or groups
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of group or function
+ * @flags: A set of flags
+ * @array: A pointer to a list of pins, groups or functions
+ *
+ * Get a list of pins or groups associated with @id in @array.
+ * @flags can be SCMI_PINCTRL_TYPE_GROUP or FUNCTION.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_list_assocs(struct udevice *dev, u32 id, u32 flags,
+ u16 **array);
+
+/**
+ * scmi_pinctrl_config_get - Get configuration
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin or group
+ * @all_configs: Identifier of pin or group
+ * @selector: Type of id
+ * @config_type: Type of configuration
+ * @configs: A pointer to an array of configuration data
+ *
+ * If @all_configs is set, get a list of values of all configuration types
+ * associated with @id in @configs, otherwise get the configuration for
+ * a specific @config_type. Each configuration data is presented in a form
+ * of struct scmi_pin_entry.
+ * @selector can be SCMI_PINCTRL_TYPE_PIN or GROUP.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_config_get(struct udevice *dev, u32 id, bool all_configs,
+ int selector, unsigned int config_type,
+ struct scmi_pin_entry **configs);
+
+/**
+ * scmi_pinctrl_config_set - Set configuration
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin or group
+ * @selector: Type of id
+ * @num_configs: A number of configuration data
+ * @configs: A pointer to an array of configuration data
+ *
+ * Configure a pin or group associated with @id using @configs.
+ * Each configuration data is presented in a form of struct scmi_pin_entry.
+ * @selector can be SCMI_PINCTRL_TYPE_PIN or GROUP.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_config_set(struct udevice *dev, u32 id, int selector,
+ int num_configs, struct scmi_pin_entry *configs);
+
+/**
+ * scmi_pinctrl_function_select - Select a function
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin or group
+ * @function_id: Identifier of function
+ * @flags: A set of flags
+ *
+ * Select a function, @function_id, for a pin or group with @id.
+ * @flags can be SCMI_PINCTRL_TYPE_PIN or GROUP.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_function_select(struct udevice *dev, u32 id, u32 function_id,
+ u32 flags);
+
+/**
+ * scmi_pinctrl_request - Request exclusive control
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin or group
+ * @flags: A set of flags
+ *
+ * Make a request for exclusive control of pin or group with @id by this agent.
+ * Once granted, no other agent can access @id until released.
+ * @flags can be SCMI_PINCTRL_TYPE_PIN or GROUP.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_request(struct udevice *dev, u32 id, u32 flags);
+
+/**
+ * scmi_pinctrl_release - Release exclusive control
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin or group
+ * @flags: A set of flags
+ *
+ * Release exclusive control of pin or group with @id by this agent.
+ * @flags can be SCMI_PINCTRL_TYPE_PIN or GROUP.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_release(struct udevice *dev, u32 id, u32 flags);
+
+/**
+ * scmi_pinctrl_name_get - Get extended name
+ * @dev: SCMI pinctrl device
+ * @id: Identifier of pin, group or function
+ * @flags: A set of flags
+ *
+ * Get an extended name of pin, group or function with @id.
+ * @flags can be SCMI_PINCTRL_TYPE_PIN, GROUP or FUNCTION.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_name_get(struct udevice *dev, u32 id, u32 flags, u8 **name);
+
+/**
+ * scmi_pinctrl_set_permissions - Claim access permission
+ * @dev: SCMI pinctrl device
+ * @agent_id: Identifier of SCMI agent
+ * @id: Identifier of pin or group
+ * @flags: A set of flags
+ *
+ * Request to set or deny access permission against @id for the agent
+ * with @agent_id.
+ * Bit[2] of @flags indicates "allow access" if set, otherwise "deny access".
+ * @flags should have SCMI_PINCTRL_TYPE_PIN or GROUP.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+int scmi_pinctrl_set_permissions(struct udevice *dev, u32 agent_id, u32 id,
+ u32 flags);
+
#endif /* _SCMI_PROTOCOLS_H */
With this patch, transport-level utility functions for SCMI pinctrl protocol are added. DM-compliant device drivers, pinctrl and gpio, are added in the following patches. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> --- cmd/scmi.c | 1 + drivers/firmware/scmi/Kconfig | 3 + drivers/firmware/scmi/Makefile | 1 + drivers/firmware/scmi/pinctrl.c | 412 ++++++++++++++++++++ drivers/firmware/scmi/scmi_agent-uclass.c | 11 + include/scmi_agent-uclass.h | 2 + include/scmi_protocols.h | 435 ++++++++++++++++++++++ 7 files changed, 865 insertions(+) create mode 100644 drivers/firmware/scmi/pinctrl.c