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1f213ee4db
Implement voltage regulators interfaced by the SCMI voltage domain protocol. The DT bindings are defined in the Linux kernel since SCMI voltage domain and regulators patches [1] and [2] integration in v5.11-rc7. Link: [1]0f80fcec08Link: [2]2add5cacffSigned-off-by: Etienne Carriere <etienne.carriere@linaro.org> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
293 lines
6.6 KiB
C
293 lines
6.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
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/*
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* Copyright (c) 2015-2019, Arm Limited and Contributors. All rights reserved.
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* Copyright (C) 2019-2020, Linaro Limited
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*/
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#ifndef _SCMI_PROTOCOLS_H
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#define _SCMI_PROTOCOLS_H
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#include <linux/bitops.h>
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#include <asm/types.h>
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/*
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* Subset the SCMI protocols definition
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* based on SCMI specification v2.0 (DEN0056B)
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* https://developer.arm.com/docs/den0056/b
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*/
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enum scmi_std_protocol {
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SCMI_PROTOCOL_ID_BASE = 0x10,
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SCMI_PROTOCOL_ID_POWER_DOMAIN = 0x11,
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SCMI_PROTOCOL_ID_SYSTEM = 0x12,
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SCMI_PROTOCOL_ID_PERF = 0x13,
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SCMI_PROTOCOL_ID_CLOCK = 0x14,
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SCMI_PROTOCOL_ID_SENSOR = 0x15,
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SCMI_PROTOCOL_ID_RESET_DOMAIN = 0x16,
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SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN = 0x17,
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};
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enum scmi_status_code {
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SCMI_SUCCESS = 0,
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SCMI_NOT_SUPPORTED = -1,
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SCMI_INVALID_PARAMETERS = -2,
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SCMI_DENIED = -3,
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SCMI_NOT_FOUND = -4,
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SCMI_OUT_OF_RANGE = -5,
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SCMI_BUSY = -6,
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SCMI_COMMS_ERROR = -7,
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SCMI_GENERIC_ERROR = -8,
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SCMI_HARDWARE_ERROR = -9,
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SCMI_PROTOCOL_ERROR = -10,
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};
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/*
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* SCMI Clock Protocol
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*/
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enum scmi_clock_message_id {
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SCMI_CLOCK_RATE_SET = 0x5,
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SCMI_CLOCK_RATE_GET = 0x6,
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SCMI_CLOCK_CONFIG_SET = 0x7,
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};
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#define SCMI_CLK_RATE_ASYNC_NOTIFY BIT(0)
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#define SCMI_CLK_RATE_ASYNC_NORESP (BIT(0) | BIT(1))
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#define SCMI_CLK_RATE_ROUND_DOWN 0
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#define SCMI_CLK_RATE_ROUND_UP BIT(2)
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#define SCMI_CLK_RATE_ROUND_CLOSEST BIT(3)
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/**
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* struct scmi_clk_state_in - Message payload for CLOCK_CONFIG_SET command
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* @clock_id: SCMI clock ID
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* @attributes: Attributes of the targets clock state
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*/
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struct scmi_clk_state_in {
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u32 clock_id;
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u32 attributes;
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};
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/**
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* struct scmi_clk_state_out - Response payload for CLOCK_CONFIG_SET command
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* @status: SCMI command status
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*/
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struct scmi_clk_state_out {
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s32 status;
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};
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/**
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* struct scmi_clk_state_in - Message payload for CLOCK_RATE_GET command
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* @clock_id: SCMI clock ID
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* @attributes: Attributes of the targets clock state
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*/
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struct scmi_clk_rate_get_in {
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u32 clock_id;
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};
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/**
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* struct scmi_clk_rate_get_out - Response payload for CLOCK_RATE_GET command
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* @status: SCMI command status
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* @rate_lsb: 32bit LSB of the clock rate in Hertz
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* @rate_msb: 32bit MSB of the clock rate in Hertz
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*/
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struct scmi_clk_rate_get_out {
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s32 status;
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u32 rate_lsb;
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u32 rate_msb;
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};
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/**
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* struct scmi_clk_state_in - Message payload for CLOCK_RATE_SET command
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* @clock_id: SCMI clock ID
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* @flags: Flags for the clock rate set request
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* @rate_lsb: 32bit LSB of the clock rate in Hertz
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* @rate_msb: 32bit MSB of the clock rate in Hertz
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*/
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struct scmi_clk_rate_set_in {
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u32 clock_id;
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u32 flags;
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u32 rate_lsb;
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u32 rate_msb;
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};
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/**
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* struct scmi_clk_rate_set_out - Response payload for CLOCK_RATE_SET command
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* @status: SCMI command status
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*/
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struct scmi_clk_rate_set_out {
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s32 status;
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};
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/*
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* SCMI Reset Domain Protocol
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*/
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enum scmi_reset_domain_message_id {
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SCMI_RESET_DOMAIN_ATTRIBUTES = 0x3,
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SCMI_RESET_DOMAIN_RESET = 0x4,
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};
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#define SCMI_RD_NAME_LEN 16
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#define SCMI_RD_ATTRIBUTES_FLAG_ASYNC BIT(31)
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#define SCMI_RD_ATTRIBUTES_FLAG_NOTIF BIT(30)
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#define SCMI_RD_RESET_FLAG_ASYNC BIT(2)
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#define SCMI_RD_RESET_FLAG_ASSERT BIT(1)
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#define SCMI_RD_RESET_FLAG_CYCLE BIT(0)
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/**
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* struct scmi_rd_attr_in - Payload for RESET_DOMAIN_ATTRIBUTES message
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* @domain_id: SCMI reset domain ID
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*/
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struct scmi_rd_attr_in {
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u32 domain_id;
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};
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/**
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* struct scmi_rd_attr_out - Payload for RESET_DOMAIN_ATTRIBUTES response
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* @status: SCMI command status
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* @attributes: Retrieved attributes of the reset domain
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* @latency: Reset cycle max lantency
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* @name: Reset domain name
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*/
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struct scmi_rd_attr_out {
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s32 status;
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u32 attributes;
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u32 latency;
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char name[SCMI_RD_NAME_LEN];
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};
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/**
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* struct scmi_rd_reset_in - Message payload for RESET command
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* @domain_id: SCMI reset domain ID
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* @flags: Flags for the reset request
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* @reset_state: Reset target state
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*/
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struct scmi_rd_reset_in {
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u32 domain_id;
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u32 flags;
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u32 reset_state;
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};
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/**
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* struct scmi_rd_reset_out - Response payload for RESET command
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* @status: SCMI command status
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*/
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struct scmi_rd_reset_out {
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s32 status;
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};
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/*
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* SCMI Voltage Domain Protocol
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*/
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enum scmi_voltage_domain_message_id {
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SCMI_VOLTAGE_DOMAIN_ATTRIBUTES = 0x3,
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SCMI_VOLTAGE_DOMAIN_CONFIG_SET = 0x5,
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SCMI_VOLTAGE_DOMAIN_CONFIG_GET = 0x6,
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SCMI_VOLTAGE_DOMAIN_LEVEL_SET = 0x7,
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SCMI_VOLTAGE_DOMAIN_LEVEL_GET = 0x8,
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};
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#define SCMI_VOLTD_NAME_LEN 16
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#define SCMI_VOLTD_CONFIG_MASK GENMASK(3, 0)
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#define SCMI_VOLTD_CONFIG_OFF 0
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#define SCMI_VOLTD_CONFIG_ON 0x7
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/**
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* struct scmi_voltd_attr_in - Payload for VOLTAGE_DOMAIN_ATTRIBUTES message
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* @domain_id: SCMI voltage domain ID
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*/
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struct scmi_voltd_attr_in {
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u32 domain_id;
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};
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/**
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* struct scmi_voltd_attr_out - Payload for VOLTAGE_DOMAIN_ATTRIBUTES response
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* @status: SCMI command status
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* @attributes: Retrieved attributes of the voltage domain
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* @name: Voltage domain name
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*/
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struct scmi_voltd_attr_out {
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s32 status;
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u32 attributes;
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char name[SCMI_VOLTD_NAME_LEN];
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};
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/**
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* struct scmi_voltd_config_set_in - Message payload for VOLTAGE_CONFIG_SET cmd
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* @domain_id: SCMI voltage domain ID
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* @config: Configuration data of the voltage domain
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*/
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struct scmi_voltd_config_set_in {
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u32 domain_id;
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u32 config;
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};
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/**
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* struct scmi_voltd_config_set_out - Response for VOLTAGE_CONFIG_SET command
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* @status: SCMI command status
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*/
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struct scmi_voltd_config_set_out {
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s32 status;
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};
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/**
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* struct scmi_voltd_config_get_in - Message payload for VOLTAGE_CONFIG_GET cmd
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* @domain_id: SCMI voltage domain ID
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*/
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struct scmi_voltd_config_get_in {
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u32 domain_id;
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};
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/**
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* struct scmi_voltd_config_get_out - Response for VOLTAGE_CONFIG_GET command
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* @status: SCMI command status
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* @config: Configuration data of the voltage domain
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*/
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struct scmi_voltd_config_get_out {
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s32 status;
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u32 config;
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};
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/**
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* struct scmi_voltd_level_set_in - Message payload for VOLTAGE_LEVEL_SET cmd
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* @domain_id: SCMI voltage domain ID
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* @flags: Parameter flags for configuring target level
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* @voltage_level: Target voltage level in microvolts (uV)
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*/
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struct scmi_voltd_level_set_in {
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u32 domain_id;
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u32 flags;
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s32 voltage_level;
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};
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/**
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* struct scmi_voltd_level_set_out - Response for VOLTAGE_LEVEL_SET command
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* @status: SCMI command status
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*/
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struct scmi_voltd_level_set_out {
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s32 status;
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};
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/**
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* struct scmi_voltd_level_get_in - Message payload for VOLTAGE_LEVEL_GET cmd
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* @domain_id: SCMI voltage domain ID
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*/
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struct scmi_voltd_level_get_in {
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u32 domain_id;
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};
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/**
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* struct scmi_voltd_level_get_out - Response for VOLTAGE_LEVEL_GET command
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* @status: SCMI command status
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* @voltage_level: Voltage level in microvolts (uV)
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*/
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struct scmi_voltd_level_get_out {
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s32 status;
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s32 voltage_level;
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};
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#endif /* _SCMI_PROTOCOLS_H */
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