/*
 * Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Description:
 *      System Control and Management Interface (SCMI) support.
 */

#ifndef INTERNAL_SCMI_SENSOR_H
#define INTERNAL_SCMI_SENSOR_H

#include <stdint.h>

#define SCMI_PROTOCOL_VERSION_SENSOR UINT32_C(0x10000)

/*
 * PROTOCOL_ATTRIBUTES
 */
struct scmi_sensor_protocol_attributes_p2a {
	int32_t status;
	uint32_t attributes;
	uint32_t sensor_reg_address_low;
	uint32_t sensor_reg_address_high;
	uint32_t sensor_reg_len;
};

/*
 * SENSOR_READING_GET
 */
#define SCMI_SENSOR_PROTOCOL_READING_GET_ASYNC_FLAG_MASK    (1 << 0)

struct scmi_sensor_protocol_reading_get_a2p {
	uint32_t sensor_id;
	uint32_t flags;
};

struct scmi_sensor_protocol_reading_get_p2a {
	int32_t status;
	uint32_t sensor_value_low;
	uint32_t sensor_value_high;
};

/*
 * SENSOR_DESCRIPTION_GET
 */
 #define SCMI_SENSOR_DESCS_MAX(MAILBOX_SIZE) \
	((sizeof(struct scmi_sensor_protocol_description_get_p2a) < MAILBOX_SIZE) \
	? ((MAILBOX_SIZE - \
	   sizeof(struct scmi_sensor_protocol_description_get_p2a)) \
	   / sizeof(struct scmi_sensor_desc)) \
	: 0)

#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_TYPE_POS              0
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_POS   11
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_POS 22
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_INTERVAL_POS   27

#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_TYPE_MASK \
	(UINT32_C(0xFF) << SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_TYPE_POS)
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_MASK \
	(UINT32_C(0x1F) << SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_POS)
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_MASK \
	(UINT32_C(0x1F) << \
	SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_POS)
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_INTERVAL_MASK \
	(UINT32_C(0x1F) << SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_INTERVAL_POS)

#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_MAX \
	(int32_t)(SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_MASK >> 1)
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_MIN \
	(-(SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_MAX + 1))

#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_MAX \
	(int32_t)(SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_INTERVAL_MASK >> 1)
#define SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_MIN \
	(-(SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_MAX + 1))

#define SCMI_SENSOR_DESC_ATTRIBUTES_HIGH(SENSOR_TYPE, UNIT_MULTIPLIER, \
					 UPDATE_MULTIPLIER, UPDATE_INTERVAL) \
	( \
	(((SENSOR_TYPE) << \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_TYPE_POS) & \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_TYPE_MASK) | \
	   (((UNIT_MULTIPLIER) << \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_POS) & \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UNIT_MULTIPLIER_MASK) | \
	   (((UPDATE_MULTIPLIER) << \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_POS) & \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_MULTIPLIER_MASK) | \
	   (((UPDATE_INTERVAL) << \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_INTERVAL_POS) & \
	   SCMI_SENSOR_DESC_ATTRS_HIGH_SENSOR_UPDATE_INTERVAL_MASK) \
	)

#define SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_DESCS_POS              0
#define SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_REMAINING_DESCS_POS   16

#define SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_DESCS_MASK \
	(UINT32_C(0xFFF) << SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_DESCS_POS)
#define SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_REMAINING_DESCS_MASK \
	(UINT32_C(0xFFFF) << SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_REMAINING_DESCS_POS)

#define SCMI_SENSOR_NUM_SENSOR_FLAGS(NUM_DESCS, NUM_REMAINING_DESCS) \
	( \
	(((NUM_DESCS) << \
	  SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_DESCS_POS) & \
	  SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_DESCS_MASK) | \
	  (((NUM_REMAINING_DESCS) << \
	    SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_REMAINING_DESCS_POS) & \
	    SCMI_SENSOR_NUM_SENSOR_FLAGS_NUM_REMAINING_DESCS_MASK) \
	)

#define SCMI_SENSOR_NAME_LEN    16

struct scmi_sensor_desc {
	uint32_t sensor_id;
	uint32_t sensor_attributes_low;
	uint32_t sensor_attributes_high;
	char sensor_name[SCMI_SENSOR_NAME_LEN];
};

struct scmi_sensor_protocol_description_get_a2p {
	uint32_t desc_index;
};

struct scmi_sensor_protocol_description_get_p2a {
	int32_t status;
	uint32_t num_sensor_flags;
	struct scmi_sensor_desc sensor_desc[];
};

/* Event indices */
enum scmi_sensor_api_idx {
	SCMI_SENSOR_EVENT_IDX_REQUEST,
	SCMI_SENSOR_EVENT_IDX_COUNT,
};

#endif /* INTERNAL_SCMI_SENSOR_H */