^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * System Control and Power Interface (SCPI) Message Protocol driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * SCPI Message Protocol is used between the System Control Processor(SCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * and the Application Processors(AP). The Message Handling Unit(MHU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * provides a mechanism for inter-processor communication between SCP's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Cortex M3 and AP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * SCP offers control and management of the core/cluster power states,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * various power domain DVFS including the core/cluster, certain system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * clocks configuration, thermal sensors and many others.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Copyright (C) 2015 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/bitmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/bitfield.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/mailbox_client.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/printk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/pm_opp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/scpi_protocol.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/sort.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define CMD_ID_MASK GENMASK(6, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define CMD_TOKEN_ID_MASK GENMASK(15, 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define CMD_DATA_SIZE_MASK GENMASK(24, 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define CMD_LEGACY_DATA_SIZE_MASK GENMASK(28, 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define PACK_SCPI_CMD(cmd_id, tx_sz) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) (FIELD_PREP(CMD_ID_MASK, cmd_id) | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) FIELD_PREP(CMD_DATA_SIZE_MASK, tx_sz))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define PACK_LEGACY_SCPI_CMD(cmd_id, tx_sz) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) (FIELD_PREP(CMD_ID_MASK, cmd_id) | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) FIELD_PREP(CMD_LEGACY_DATA_SIZE_MASK, tx_sz))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define CMD_SIZE(cmd) FIELD_GET(CMD_DATA_SIZE_MASK, cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define CMD_UNIQ_MASK (CMD_TOKEN_ID_MASK | CMD_ID_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define CMD_XTRACT_UNIQ(cmd) ((cmd) & CMD_UNIQ_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define SCPI_SLOT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define MAX_DVFS_DOMAINS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define MAX_DVFS_OPPS 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define PROTO_REV_MAJOR_MASK GENMASK(31, 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define PROTO_REV_MINOR_MASK GENMASK(15, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define FW_REV_MAJOR_MASK GENMASK(31, 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define FW_REV_MINOR_MASK GENMASK(23, 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define FW_REV_PATCH_MASK GENMASK(15, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define MAX_RX_TIMEOUT (msecs_to_jiffies(30))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) enum scpi_error_codes {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) SCPI_SUCCESS = 0, /* Success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) SCPI_ERR_PARAM = 1, /* Invalid parameter(s) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) SCPI_ERR_ALIGN = 2, /* Invalid alignment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) SCPI_ERR_SIZE = 3, /* Invalid size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) SCPI_ERR_HANDLER = 4, /* Invalid handler/callback */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) SCPI_ERR_ACCESS = 5, /* Invalid access/permission denied */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) SCPI_ERR_RANGE = 6, /* Value out of range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) SCPI_ERR_TIMEOUT = 7, /* Timeout has occurred */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) SCPI_ERR_NOMEM = 8, /* Invalid memory area or pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) SCPI_ERR_PWRSTATE = 9, /* Invalid power state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) SCPI_ERR_SUPPORT = 10, /* Not supported or disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) SCPI_ERR_DEVICE = 11, /* Device error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) SCPI_ERR_BUSY = 12, /* Device busy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) SCPI_ERR_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* SCPI Standard commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) enum scpi_std_cmd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) SCPI_CMD_INVALID = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) SCPI_CMD_SCPI_READY = 0x01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) SCPI_CMD_SCPI_CAPABILITIES = 0x02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) SCPI_CMD_SET_CSS_PWR_STATE = 0x03,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) SCPI_CMD_GET_CSS_PWR_STATE = 0x04,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) SCPI_CMD_SET_SYS_PWR_STATE = 0x05,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) SCPI_CMD_SET_CPU_TIMER = 0x06,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) SCPI_CMD_CANCEL_CPU_TIMER = 0x07,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) SCPI_CMD_DVFS_CAPABILITIES = 0x08,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) SCPI_CMD_GET_DVFS_INFO = 0x09,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) SCPI_CMD_SET_DVFS = 0x0a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) SCPI_CMD_GET_DVFS = 0x0b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) SCPI_CMD_GET_DVFS_STAT = 0x0c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) SCPI_CMD_CLOCK_CAPABILITIES = 0x0d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) SCPI_CMD_GET_CLOCK_INFO = 0x0e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) SCPI_CMD_SET_CLOCK_VALUE = 0x0f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) SCPI_CMD_GET_CLOCK_VALUE = 0x10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) SCPI_CMD_PSU_CAPABILITIES = 0x11,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) SCPI_CMD_GET_PSU_INFO = 0x12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) SCPI_CMD_SET_PSU = 0x13,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) SCPI_CMD_GET_PSU = 0x14,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) SCPI_CMD_SENSOR_CAPABILITIES = 0x15,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) SCPI_CMD_SENSOR_INFO = 0x16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) SCPI_CMD_SENSOR_VALUE = 0x17,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) SCPI_CMD_SENSOR_CFG_PERIODIC = 0x18,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) SCPI_CMD_SENSOR_CFG_BOUNDS = 0x19,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) SCPI_CMD_SENSOR_ASYNC_VALUE = 0x1a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) SCPI_CMD_SET_DEVICE_PWR_STATE = 0x1b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) SCPI_CMD_GET_DEVICE_PWR_STATE = 0x1c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) SCPI_CMD_COUNT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* SCPI Legacy Commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) enum legacy_scpi_std_cmd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) LEGACY_SCPI_CMD_INVALID = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) LEGACY_SCPI_CMD_SCPI_READY = 0x01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) LEGACY_SCPI_CMD_SCPI_CAPABILITIES = 0x02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) LEGACY_SCPI_CMD_EVENT = 0x03,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) LEGACY_SCPI_CMD_SET_CSS_PWR_STATE = 0x04,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) LEGACY_SCPI_CMD_GET_CSS_PWR_STATE = 0x05,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) LEGACY_SCPI_CMD_CFG_PWR_STATE_STAT = 0x06,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) LEGACY_SCPI_CMD_GET_PWR_STATE_STAT = 0x07,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) LEGACY_SCPI_CMD_SYS_PWR_STATE = 0x08,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) LEGACY_SCPI_CMD_L2_READY = 0x09,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) LEGACY_SCPI_CMD_SET_AP_TIMER = 0x0a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) LEGACY_SCPI_CMD_CANCEL_AP_TIME = 0x0b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) LEGACY_SCPI_CMD_DVFS_CAPABILITIES = 0x0c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) LEGACY_SCPI_CMD_GET_DVFS_INFO = 0x0d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) LEGACY_SCPI_CMD_SET_DVFS = 0x0e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) LEGACY_SCPI_CMD_GET_DVFS = 0x0f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) LEGACY_SCPI_CMD_GET_DVFS_STAT = 0x10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) LEGACY_SCPI_CMD_SET_RTC = 0x11,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) LEGACY_SCPI_CMD_GET_RTC = 0x12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) LEGACY_SCPI_CMD_CLOCK_CAPABILITIES = 0x13,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) LEGACY_SCPI_CMD_SET_CLOCK_INDEX = 0x14,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) LEGACY_SCPI_CMD_SET_CLOCK_VALUE = 0x15,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) LEGACY_SCPI_CMD_GET_CLOCK_VALUE = 0x16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) LEGACY_SCPI_CMD_PSU_CAPABILITIES = 0x17,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) LEGACY_SCPI_CMD_SET_PSU = 0x18,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) LEGACY_SCPI_CMD_GET_PSU = 0x19,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) LEGACY_SCPI_CMD_SENSOR_CAPABILITIES = 0x1a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) LEGACY_SCPI_CMD_SENSOR_INFO = 0x1b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) LEGACY_SCPI_CMD_SENSOR_VALUE = 0x1c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) LEGACY_SCPI_CMD_SENSOR_CFG_PERIODIC = 0x1d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) LEGACY_SCPI_CMD_SENSOR_CFG_BOUNDS = 0x1e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) LEGACY_SCPI_CMD_SENSOR_ASYNC_VALUE = 0x1f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) LEGACY_SCPI_CMD_COUNT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* List all commands that are required to go through the high priority link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int legacy_hpriority_cmds[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) LEGACY_SCPI_CMD_GET_CSS_PWR_STATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) LEGACY_SCPI_CMD_CFG_PWR_STATE_STAT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) LEGACY_SCPI_CMD_GET_PWR_STATE_STAT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) LEGACY_SCPI_CMD_SET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) LEGACY_SCPI_CMD_GET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) LEGACY_SCPI_CMD_SET_RTC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) LEGACY_SCPI_CMD_GET_RTC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) LEGACY_SCPI_CMD_SET_CLOCK_INDEX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) LEGACY_SCPI_CMD_SET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) LEGACY_SCPI_CMD_GET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) LEGACY_SCPI_CMD_SET_PSU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) LEGACY_SCPI_CMD_GET_PSU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) LEGACY_SCPI_CMD_SENSOR_CFG_PERIODIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) LEGACY_SCPI_CMD_SENSOR_CFG_BOUNDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /* List all commands used by this driver, used as indexes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) enum scpi_drv_cmds {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) CMD_SCPI_CAPABILITIES = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) CMD_GET_CLOCK_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) CMD_GET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) CMD_SET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) CMD_GET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) CMD_SET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) CMD_GET_DVFS_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) CMD_SENSOR_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) CMD_SENSOR_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) CMD_SENSOR_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) CMD_SET_DEVICE_PWR_STATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) CMD_GET_DEVICE_PWR_STATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) CMD_MAX_COUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int scpi_std_commands[CMD_MAX_COUNT] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) SCPI_CMD_SCPI_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) SCPI_CMD_GET_CLOCK_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) SCPI_CMD_GET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) SCPI_CMD_SET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) SCPI_CMD_GET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) SCPI_CMD_SET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) SCPI_CMD_GET_DVFS_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) SCPI_CMD_SENSOR_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) SCPI_CMD_SENSOR_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) SCPI_CMD_SENSOR_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) SCPI_CMD_SET_DEVICE_PWR_STATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) SCPI_CMD_GET_DEVICE_PWR_STATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static int scpi_legacy_commands[CMD_MAX_COUNT] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) LEGACY_SCPI_CMD_SCPI_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) -1, /* GET_CLOCK_INFO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) LEGACY_SCPI_CMD_GET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) LEGACY_SCPI_CMD_SET_CLOCK_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) LEGACY_SCPI_CMD_GET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) LEGACY_SCPI_CMD_SET_DVFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) LEGACY_SCPI_CMD_GET_DVFS_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) LEGACY_SCPI_CMD_SENSOR_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) LEGACY_SCPI_CMD_SENSOR_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) LEGACY_SCPI_CMD_SENSOR_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) -1, /* SET_DEVICE_PWR_STATE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) -1, /* GET_DEVICE_PWR_STATE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct scpi_xfer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) u32 slot; /* has to be first element */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) u32 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) u32 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) const void *tx_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) void *rx_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) unsigned int tx_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) unsigned int rx_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) struct list_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct completion done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct scpi_chan {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct mbox_client cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct mbox_chan *chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) void __iomem *tx_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) void __iomem *rx_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct list_head rx_pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct list_head xfers_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct scpi_xfer *xfers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) spinlock_t rx_lock; /* locking for the rx pending list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct mutex xfers_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) u8 token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct scpi_drvinfo {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) u32 protocol_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) u32 firmware_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) bool is_legacy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int num_chans;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int *commands;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) DECLARE_BITMAP(cmd_priority, LEGACY_SCPI_CMD_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) atomic_t next_chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct scpi_ops *scpi_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct scpi_chan *channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct scpi_dvfs_info *dvfs[MAX_DVFS_DOMAINS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * The SCP firmware only executes in little-endian mode, so any buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * shared through SCPI should have their contents converted to little-endian
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct scpi_shared_mem {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) __le32 command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) __le32 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) u8 payload[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) struct legacy_scpi_shared_mem {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) __le32 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) u8 payload[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct scp_capabilities {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) __le32 protocol_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) __le32 event_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) __le32 platform_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) __le32 commands[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) struct clk_get_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) __le16 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) __le16 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) __le32 min_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) __le32 max_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) u8 name[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct clk_set_value {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) __le16 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) __le16 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) __le32 rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct legacy_clk_set_value {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) __le32 rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) __le16 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) __le16 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct dvfs_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) u8 domain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) u8 opp_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) __le16 latency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) __le32 freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) __le32 m_volt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) } opps[MAX_DVFS_OPPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct dvfs_set {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) u8 domain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) u8 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct _scpi_sensor_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) __le16 sensor_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) u8 class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) u8 trigger_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) char name[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct dev_pstate_set {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) __le16 dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) u8 pstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static struct scpi_drvinfo *scpi_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static int scpi_linux_errmap[SCPI_ERR_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* better than switch case as long as return value is continuous */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 0, /* SCPI_SUCCESS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) -EINVAL, /* SCPI_ERR_PARAM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) -ENOEXEC, /* SCPI_ERR_ALIGN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) -EMSGSIZE, /* SCPI_ERR_SIZE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) -EINVAL, /* SCPI_ERR_HANDLER */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) -EACCES, /* SCPI_ERR_ACCESS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) -ERANGE, /* SCPI_ERR_RANGE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) -ETIMEDOUT, /* SCPI_ERR_TIMEOUT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) -ENOMEM, /* SCPI_ERR_NOMEM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) -EINVAL, /* SCPI_ERR_PWRSTATE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) -EOPNOTSUPP, /* SCPI_ERR_SUPPORT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) -EIO, /* SCPI_ERR_DEVICE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) -EBUSY, /* SCPI_ERR_BUSY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static inline int scpi_to_linux_errno(int errno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (errno >= SCPI_SUCCESS && errno < SCPI_ERR_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return scpi_linux_errmap[errno];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) struct scpi_xfer *t, *match = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) spin_lock_irqsave(&ch->rx_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (list_empty(&ch->rx_pending)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) spin_unlock_irqrestore(&ch->rx_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) /* Command type is not replied by the SCP Firmware in legacy Mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * We should consider that command is the head of pending RX commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * if the list is not empty. In TX only mode, the list would be empty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (scpi_info->is_legacy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) match = list_first_entry(&ch->rx_pending, struct scpi_xfer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) list_del(&match->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) list_for_each_entry(t, &ch->rx_pending, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (CMD_XTRACT_UNIQ(t->cmd) == CMD_XTRACT_UNIQ(cmd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) list_del(&t->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) match = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /* check if wait_for_completion is in progress or timed-out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (match && !completion_done(&match->done)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (scpi_info->is_legacy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct legacy_scpi_shared_mem __iomem *mem =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) ch->rx_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) /* RX Length is not replied by the legacy Firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) len = match->rx_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) match->status = ioread32(&mem->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) memcpy_fromio(match->rx_buf, mem->payload, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct scpi_shared_mem __iomem *mem = ch->rx_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) len = min_t(unsigned int, match->rx_len, CMD_SIZE(cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) match->status = ioread32(&mem->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) memcpy_fromio(match->rx_buf, mem->payload, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (match->rx_len > len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) memset(match->rx_buf + len, 0, match->rx_len - len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) complete(&match->done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) spin_unlock_irqrestore(&ch->rx_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static void scpi_handle_remote_msg(struct mbox_client *c, void *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct scpi_chan *ch = container_of(c, struct scpi_chan, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct scpi_shared_mem __iomem *mem = ch->rx_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) u32 cmd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (!scpi_info->is_legacy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) cmd = ioread32(&mem->command);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) scpi_process_cmd(ch, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) static void scpi_tx_prepare(struct mbox_client *c, void *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct scpi_xfer *t = msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct scpi_chan *ch = container_of(c, struct scpi_chan, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) struct scpi_shared_mem __iomem *mem = ch->tx_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (t->tx_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (scpi_info->is_legacy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) memcpy_toio(ch->tx_payload, t->tx_buf, t->tx_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) memcpy_toio(mem->payload, t->tx_buf, t->tx_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (t->rx_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (!(++ch->token))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) ++ch->token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) t->cmd |= FIELD_PREP(CMD_TOKEN_ID_MASK, ch->token);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) spin_lock_irqsave(&ch->rx_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) list_add_tail(&t->node, &ch->rx_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) spin_unlock_irqrestore(&ch->rx_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (!scpi_info->is_legacy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) iowrite32(t->cmd, &mem->command);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) static struct scpi_xfer *get_scpi_xfer(struct scpi_chan *ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct scpi_xfer *t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) mutex_lock(&ch->xfers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (list_empty(&ch->xfers_list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) mutex_unlock(&ch->xfers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) t = list_first_entry(&ch->xfers_list, struct scpi_xfer, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) list_del(&t->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) mutex_unlock(&ch->xfers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) static void put_scpi_xfer(struct scpi_xfer *t, struct scpi_chan *ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) mutex_lock(&ch->xfers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) list_add_tail(&t->node, &ch->xfers_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) mutex_unlock(&ch->xfers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static int scpi_send_message(u8 idx, void *tx_buf, unsigned int tx_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) void *rx_buf, unsigned int rx_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) u8 chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) u8 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct scpi_xfer *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct scpi_chan *scpi_chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (scpi_info->commands[idx] < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) cmd = scpi_info->commands[idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (scpi_info->is_legacy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) chan = test_bit(cmd, scpi_info->cmd_priority) ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) chan = atomic_inc_return(&scpi_info->next_chan) %
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) scpi_info->num_chans;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) scpi_chan = scpi_info->channels + chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) msg = get_scpi_xfer(scpi_chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (!msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (scpi_info->is_legacy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) msg->cmd = PACK_LEGACY_SCPI_CMD(cmd, tx_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) msg->slot = msg->cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) msg->slot = BIT(SCPI_SLOT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) msg->cmd = PACK_SCPI_CMD(cmd, tx_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) msg->tx_buf = tx_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) msg->tx_len = tx_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) msg->rx_buf = rx_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) msg->rx_len = rx_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) reinit_completion(&msg->done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) ret = mbox_send_message(scpi_chan->chan, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (ret < 0 || !rx_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (!wait_for_completion_timeout(&msg->done, MAX_RX_TIMEOUT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) ret = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /* first status word */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) ret = msg->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (ret < 0 && rx_buf) /* remove entry from the list if timed-out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) scpi_process_cmd(scpi_chan, msg->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) put_scpi_xfer(msg, scpi_chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) /* SCPI error codes > 0, translate them to Linux scale*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) return ret > 0 ? scpi_to_linux_errno(ret) : ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) static u32 scpi_get_version(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return scpi_info->protocol_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) scpi_clk_get_range(u16 clk_id, unsigned long *min, unsigned long *max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) struct clk_get_info clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) __le16 le_clk_id = cpu_to_le16(clk_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) ret = scpi_send_message(CMD_GET_CLOCK_INFO, &le_clk_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) sizeof(le_clk_id), &clk, sizeof(clk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) *min = le32_to_cpu(clk.min_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) *max = le32_to_cpu(clk.max_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) static unsigned long scpi_clk_get_val(u16 clk_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) __le32 rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) __le16 le_clk_id = cpu_to_le16(clk_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) ret = scpi_send_message(CMD_GET_CLOCK_VALUE, &le_clk_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) sizeof(le_clk_id), &rate, sizeof(rate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return le32_to_cpu(rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) static int scpi_clk_set_val(u16 clk_id, unsigned long rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) int stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) struct clk_set_value clk = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) .id = cpu_to_le16(clk_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) .rate = cpu_to_le32(rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return scpi_send_message(CMD_SET_CLOCK_VALUE, &clk, sizeof(clk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) &stat, sizeof(stat));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) static int legacy_scpi_clk_set_val(u16 clk_id, unsigned long rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) int stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) struct legacy_clk_set_value clk = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) .id = cpu_to_le16(clk_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) .rate = cpu_to_le32(rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return scpi_send_message(CMD_SET_CLOCK_VALUE, &clk, sizeof(clk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) &stat, sizeof(stat));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) static int scpi_dvfs_get_idx(u8 domain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) u8 dvfs_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) ret = scpi_send_message(CMD_GET_DVFS, &domain, sizeof(domain),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) &dvfs_idx, sizeof(dvfs_idx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) return ret ? ret : dvfs_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) static int scpi_dvfs_set_idx(u8 domain, u8 index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) int stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) struct dvfs_set dvfs = {domain, index};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) return scpi_send_message(CMD_SET_DVFS, &dvfs, sizeof(dvfs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) &stat, sizeof(stat));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) static int opp_cmp_func(const void *opp1, const void *opp2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) const struct scpi_opp *t1 = opp1, *t2 = opp2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return t1->freq - t2->freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) struct scpi_dvfs_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct scpi_opp *opp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) struct dvfs_info buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (domain >= MAX_DVFS_DOMAINS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) if (scpi_info->dvfs[domain]) /* data already populated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) return scpi_info->dvfs[domain];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) ret = scpi_send_message(CMD_GET_DVFS_INFO, &domain, sizeof(domain),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) &buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) info = kmalloc(sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) info->count = buf.opp_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) info->latency = le16_to_cpu(buf.latency) * 1000; /* uS to nS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) info->opps = kcalloc(info->count, sizeof(*opp), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (!info->opps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) for (i = 0, opp = info->opps; i < info->count; i++, opp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) opp->freq = le32_to_cpu(buf.opps[i].freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) opp->m_volt = le32_to_cpu(buf.opps[i].m_volt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) sort(info->opps, info->count, sizeof(*opp), opp_cmp_func, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) scpi_info->dvfs[domain] = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) static int scpi_dev_domain_id(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) struct of_phandle_args clkspec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) 0, &clkspec))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return clkspec.args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) static struct scpi_dvfs_info *scpi_dvfs_info(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) int domain = scpi_dev_domain_id(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (domain < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) return ERR_PTR(domain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) return scpi_dvfs_get_info(domain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) static int scpi_dvfs_get_transition_latency(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) struct scpi_dvfs_info *info = scpi_dvfs_info(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (IS_ERR(info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return PTR_ERR(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return info->latency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) static int scpi_dvfs_add_opps_to_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) int idx, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) struct scpi_opp *opp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) struct scpi_dvfs_info *info = scpi_dvfs_info(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (IS_ERR(info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return PTR_ERR(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) if (!info->opps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) for (opp = info->opps, idx = 0; idx < info->count; idx++, opp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) ret = dev_pm_opp_add(dev, opp->freq, opp->m_volt * 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) dev_warn(dev, "failed to add opp %uHz %umV\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) opp->freq, opp->m_volt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) while (idx-- > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) dev_pm_opp_remove(dev, (--opp)->freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) static int scpi_sensor_get_capability(u16 *sensors)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) __le16 cap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) ret = scpi_send_message(CMD_SENSOR_CAPABILITIES, NULL, 0, &cap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) sizeof(cap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) *sensors = le16_to_cpu(cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) static int scpi_sensor_get_info(u16 sensor_id, struct scpi_sensor_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) __le16 id = cpu_to_le16(sensor_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) struct _scpi_sensor_info _info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) ret = scpi_send_message(CMD_SENSOR_INFO, &id, sizeof(id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) &_info, sizeof(_info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) memcpy(info, &_info, sizeof(*info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) info->sensor_id = le16_to_cpu(_info.sensor_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) static int scpi_sensor_get_value(u16 sensor, u64 *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) __le16 id = cpu_to_le16(sensor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) __le64 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) ret = scpi_send_message(CMD_SENSOR_VALUE, &id, sizeof(id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) &value, sizeof(value));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) if (scpi_info->is_legacy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) /* only 32-bits supported, upper 32 bits can be junk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) *val = le32_to_cpup((__le32 *)&value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) *val = le64_to_cpu(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) static int scpi_device_get_power_state(u16 dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) u8 pstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) __le16 id = cpu_to_le16(dev_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) ret = scpi_send_message(CMD_GET_DEVICE_PWR_STATE, &id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) sizeof(id), &pstate, sizeof(pstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return ret ? ret : pstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) static int scpi_device_set_power_state(u16 dev_id, u8 pstate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) int stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) struct dev_pstate_set dev_set = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) .dev_id = cpu_to_le16(dev_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) .pstate = pstate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) return scpi_send_message(CMD_SET_DEVICE_PWR_STATE, &dev_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) sizeof(dev_set), &stat, sizeof(stat));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) static struct scpi_ops scpi_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) .get_version = scpi_get_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) .clk_get_range = scpi_clk_get_range,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) .clk_get_val = scpi_clk_get_val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) .clk_set_val = scpi_clk_set_val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) .dvfs_get_idx = scpi_dvfs_get_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) .dvfs_set_idx = scpi_dvfs_set_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) .dvfs_get_info = scpi_dvfs_get_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) .device_domain_id = scpi_dev_domain_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) .get_transition_latency = scpi_dvfs_get_transition_latency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) .add_opps_to_device = scpi_dvfs_add_opps_to_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) .sensor_get_capability = scpi_sensor_get_capability,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) .sensor_get_info = scpi_sensor_get_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) .sensor_get_value = scpi_sensor_get_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) .device_get_power_state = scpi_device_get_power_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) .device_set_power_state = scpi_device_set_power_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) struct scpi_ops *get_scpi_ops(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) return scpi_info ? scpi_info->scpi_ops : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) EXPORT_SYMBOL_GPL(get_scpi_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) static int scpi_init_versions(struct scpi_drvinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) struct scp_capabilities caps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) ret = scpi_send_message(CMD_SCPI_CAPABILITIES, NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) &caps, sizeof(caps));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) info->protocol_version = le32_to_cpu(caps.protocol_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) info->firmware_version = le32_to_cpu(caps.platform_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) /* Ignore error if not implemented */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (scpi_info->is_legacy && ret == -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) static ssize_t protocol_version_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) return sprintf(buf, "%lu.%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) FIELD_GET(PROTO_REV_MAJOR_MASK, scpi_info->protocol_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) FIELD_GET(PROTO_REV_MINOR_MASK, scpi_info->protocol_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) static DEVICE_ATTR_RO(protocol_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) static ssize_t firmware_version_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) return sprintf(buf, "%lu.%lu.%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) FIELD_GET(FW_REV_MAJOR_MASK, scpi_info->firmware_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) FIELD_GET(FW_REV_MINOR_MASK, scpi_info->firmware_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) FIELD_GET(FW_REV_PATCH_MASK, scpi_info->firmware_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) static DEVICE_ATTR_RO(firmware_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) static struct attribute *versions_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) &dev_attr_firmware_version.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) &dev_attr_protocol_version.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) ATTRIBUTE_GROUPS(versions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) static void scpi_free_channels(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) struct scpi_drvinfo *info = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) for (i = 0; i < info->num_chans; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) mbox_free_channel(info->channels[i].chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) static int scpi_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct scpi_drvinfo *info = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) scpi_info = NULL; /* stop exporting SCPI ops through get_scpi_ops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) for (i = 0; i < MAX_DVFS_DOMAINS && info->dvfs[i]; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) kfree(info->dvfs[i]->opps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) kfree(info->dvfs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) #define MAX_SCPI_XFERS 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) static int scpi_alloc_xfer_list(struct device *dev, struct scpi_chan *ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) struct scpi_xfer *xfers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) xfers = devm_kcalloc(dev, MAX_SCPI_XFERS, sizeof(*xfers), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) if (!xfers)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) ch->xfers = xfers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) for (i = 0; i < MAX_SCPI_XFERS; i++, xfers++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) init_completion(&xfers->done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) list_add_tail(&xfers->node, &ch->xfers_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) static const struct of_device_id legacy_scpi_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) {.compatible = "arm,scpi-pre-1.0"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) static int scpi_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) int count, idx, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) struct resource res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) scpi_info = devm_kzalloc(dev, sizeof(*scpi_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) if (!scpi_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (of_match_device(legacy_scpi_of_match, &pdev->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) scpi_info->is_legacy = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) count = of_count_phandle_with_args(np, "mboxes", "#mbox-cells");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (count < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) dev_err(dev, "no mboxes property in '%pOF'\n", np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) scpi_info->channels = devm_kcalloc(dev, count, sizeof(struct scpi_chan),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (!scpi_info->channels)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) ret = devm_add_action(dev, scpi_free_channels, scpi_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) for (; scpi_info->num_chans < count; scpi_info->num_chans++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) resource_size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) int idx = scpi_info->num_chans;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) struct scpi_chan *pchan = scpi_info->channels + idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) struct mbox_client *cl = &pchan->cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) struct device_node *shmem = of_parse_phandle(np, "shmem", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) ret = of_address_to_resource(shmem, 0, &res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) of_node_put(shmem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) dev_err(dev, "failed to get SCPI payload mem resource\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) size = resource_size(&res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) pchan->rx_payload = devm_ioremap(dev, res.start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) if (!pchan->rx_payload) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) dev_err(dev, "failed to ioremap SCPI payload\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) return -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) pchan->tx_payload = pchan->rx_payload + (size >> 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) cl->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) cl->rx_callback = scpi_handle_remote_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) cl->tx_prepare = scpi_tx_prepare;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) cl->tx_block = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) cl->tx_tout = 20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) cl->knows_txdone = false; /* controller can't ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) INIT_LIST_HEAD(&pchan->rx_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) INIT_LIST_HEAD(&pchan->xfers_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) spin_lock_init(&pchan->rx_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) mutex_init(&pchan->xfers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) ret = scpi_alloc_xfer_list(dev, pchan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) pchan->chan = mbox_request_channel(cl, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) if (!IS_ERR(pchan->chan))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) ret = PTR_ERR(pchan->chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) if (ret != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) dev_err(dev, "failed to get channel%d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) idx, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) scpi_info->commands = scpi_std_commands;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) platform_set_drvdata(pdev, scpi_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (scpi_info->is_legacy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) /* Replace with legacy variants */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) scpi_ops.clk_set_val = legacy_scpi_clk_set_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) scpi_info->commands = scpi_legacy_commands;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) /* Fill priority bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) for (idx = 0; idx < ARRAY_SIZE(legacy_hpriority_cmds); idx++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) set_bit(legacy_hpriority_cmds[idx],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) scpi_info->cmd_priority);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) ret = scpi_init_versions(scpi_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) dev_err(dev, "incorrect or no SCP firmware found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) if (scpi_info->is_legacy && !scpi_info->protocol_version &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) !scpi_info->firmware_version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) dev_info(dev, "SCP Protocol legacy pre-1.0 firmware\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) dev_info(dev, "SCP Protocol %lu.%lu Firmware %lu.%lu.%lu version\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) FIELD_GET(PROTO_REV_MAJOR_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) scpi_info->protocol_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) FIELD_GET(PROTO_REV_MINOR_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) scpi_info->protocol_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) FIELD_GET(FW_REV_MAJOR_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) scpi_info->firmware_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) FIELD_GET(FW_REV_MINOR_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) scpi_info->firmware_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) FIELD_GET(FW_REV_PATCH_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) scpi_info->firmware_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) scpi_info->scpi_ops = &scpi_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) return devm_of_platform_populate(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) static const struct of_device_id scpi_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) {.compatible = "arm,scpi"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) {.compatible = "arm,scpi-pre-1.0"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) MODULE_DEVICE_TABLE(of, scpi_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) static struct platform_driver scpi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) .name = "scpi_protocol",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) .of_match_table = scpi_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) .dev_groups = versions_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) .probe = scpi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) .remove = scpi_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) module_platform_driver(scpi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) MODULE_DESCRIPTION("ARM SCPI mailbox protocol driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags