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// SPDX-License-Identifier: GPL-2.0+
/*
* SCMI (System Control and Management Interface) utility command
*
* Copyright (c) 2023 Linaro Limited
* Author: AKASHI Takahiro
*/
#include <command.h>
#include <exports.h>
#include <scmi_agent.h>
#include <scmi_agent-uclass.h>
#include <stdlib.h>
#include <asm/types.h>
#include <dm/device.h>
#include <dm/uclass.h> /* uclass_get_device */
#include <linux/bitfield.h>
#include <linux/bitops.h>
struct {
enum scmi_std_protocol id;
const char *name;
} protocol_name[] = {
{SCMI_PROTOCOL_ID_BASE, "Base"},
{SCMI_PROTOCOL_ID_POWER_DOMAIN, "Power domain management"},
{SCMI_PROTOCOL_ID_SYSTEM, "System power management"},
{SCMI_PROTOCOL_ID_PERF, "Performance domain management"},
{SCMI_PROTOCOL_ID_CLOCK, "Clock management"},
{SCMI_PROTOCOL_ID_SENSOR, "Sensor management"},
{SCMI_PROTOCOL_ID_RESET_DOMAIN, "Reset domain management"},
{SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN, "Voltage domain management"},
};
/**
* get_agent() - get SCMI agent device
*
* Return: Pointer to SCMI agent device on success, NULL on failure
*/
static struct udevice *get_agent(void)
{
struct udevice *agent;
if (uclass_get_device(UCLASS_SCMI_AGENT, 0, &agent)) {
printf("Cannot find any SCMI agent\n");
return NULL;
}
return agent;
}
/**
* get_base_proto() - get SCMI base protocol device
* @agent: SCMI agent device
*
* Return: Pointer to SCMI base protocol device on success,
* NULL on failure
*/
static struct udevice *get_base_proto(struct udevice *agent)
{
struct udevice *base_proto;
if (!agent) {
agent = get_agent();
if (!agent)
return NULL;
}
base_proto = scmi_get_protocol(agent, SCMI_PROTOCOL_ID_BASE);
if (!base_proto) {
printf("SCMI base protocol not found\n");
return NULL;
}
return base_proto;
}
/**
* get_proto_name() - get the name of SCMI protocol
*
* @id: SCMI Protocol ID
*
* Get the printable name of the protocol, @id
*
* Return: Name string on success, NULL on failure
*/
static const char *get_proto_name(enum scmi_std_protocol id)
{
int i;
for (i = 0; i < ARRAY_SIZE(protocol_name); i++)
if (id == protocol_name[i].id)
return protocol_name[i].name;
return NULL;
}
/**
* do_scmi_info() - get the information of SCMI services
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
*
* Get the information of SCMI services using various interfaces
* provided by the Base protocol.
*
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*/
static int do_scmi_info(struct cmd_tbl *cmdtp, int flag, int argc,
char * const argv[])
{
struct udevice *agent, *base_proto;
u32 agent_id, num_protocols;
u8 *agent_name, *protocols;
int i, ret;
if (argc != 1)
return CMD_RET_USAGE;
agent = get_agent();
if (!agent)
return CMD_RET_FAILURE;
base_proto = get_base_proto(agent);
if (!base_proto)
return CMD_RET_FAILURE;
printf("SCMI device: %s\n", agent->name);
printf(" protocol version: 0x%x\n", scmi_version(agent));
printf(" # of agents: %d\n", scmi_num_agents(agent));
for (i = 0; i < scmi_num_agents(agent); i++) {
ret = scmi_base_discover_agent(base_proto, i, &agent_id,
&agent_name);
if (ret) {
if (ret != -EOPNOTSUPP)
printf("base_discover_agent() failed for id: %d (%d)\n",
i, ret);
break;
}
printf(" %c%2d: %s\n", i == scmi_agent_id(agent) ? '>' : ' ',
i, agent_name);
free(agent_name);
}
printf(" # of protocols: %d\n", scmi_num_protocols(agent));
num_protocols = scmi_num_protocols(agent);
protocols = scmi_protocols(agent);
if (protocols)
for (i = 0; i < num_protocols; i++)
printf(" %s\n", get_proto_name(protocols[i]));
printf(" vendor: %s\n", scmi_vendor(agent));
printf(" sub vendor: %s\n", scmi_sub_vendor(agent));
printf(" impl version: 0x%x\n", scmi_impl_version(agent));
return CMD_RET_SUCCESS;
}
/**
* do_scmi_set_dev() - set access permission to device
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
*
* Set access permission to device with SCMI_BASE_SET_DEVICE_PERMISSIONS
*
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*/
static int do_scmi_set_dev(struct cmd_tbl *cmdtp, int flag, int argc,
char * const argv[])
{
u32 agent_id, device_id, flags, attributes;
char *end;
struct udevice *base_proto;
int ret;
if (argc != 4)
return CMD_RET_USAGE;
agent_id = simple_strtoul(argv[1], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
device_id = simple_strtoul(argv[2], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
flags = simple_strtoul(argv[3], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
base_proto = get_base_proto(NULL);
if (!base_proto)
return CMD_RET_FAILURE;
ret = scmi_base_protocol_message_attrs(base_proto,
SCMI_BASE_SET_DEVICE_PERMISSIONS,
&attributes);
if (ret) {
printf("This operation is not supported\n");
return CMD_RET_FAILURE;
}
ret = scmi_base_set_device_permissions(base_proto, agent_id,
device_id, flags);
if (ret) {
printf("%s access to device:%u failed (%d)\n",
flags ? "Allowing" : "Denying", device_id, ret);
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
/**
* do_scmi_set_proto() - set protocol permission to device
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
*
* Set protocol permission to device with SCMI_BASE_SET_PROTOCOL_PERMISSIONS
*
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*/
static int do_scmi_set_proto(struct cmd_tbl *cmdtp, int flag, int argc,
char * const argv[])
{
u32 agent_id, device_id, protocol_id, flags, attributes;
char *end;
struct udevice *base_proto;
int ret;
if (argc != 5)
return CMD_RET_USAGE;
agent_id = simple_strtoul(argv[1], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
device_id = simple_strtoul(argv[2], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
protocol_id = simple_strtoul(argv[3], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
flags = simple_strtoul(argv[4], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
base_proto = get_base_proto(NULL);
if (!base_proto)
return CMD_RET_FAILURE;
ret = scmi_base_protocol_message_attrs(base_proto,
SCMI_BASE_SET_PROTOCOL_PERMISSIONS,
&attributes);
if (ret) {
printf("This operation is not supported\n");
return CMD_RET_FAILURE;
}
ret = scmi_base_set_protocol_permissions(base_proto, agent_id,
device_id, protocol_id,
flags);
if (ret) {
printf("%s access to protocol:0x%x on device:%u failed (%d)\n",
flags ? "Allowing" : "Denying", protocol_id, device_id,
ret);
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
/**
* do_scmi_reset() - reset platform resource settings
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
*
* Reset platform resource settings with BASE_RESET_AGENT_CONFIGURATION
*
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*/
static int do_scmi_reset(struct cmd_tbl *cmdtp, int flag, int argc,
char * const argv[])
{
u32 agent_id, flags, attributes;
char *end;
struct udevice *base_proto;
int ret;
if (argc != 3)
return CMD_RET_USAGE;
agent_id = simple_strtoul(argv[1], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
flags = simple_strtoul(argv[2], &end, 16);
if (*end != '\0')
return CMD_RET_USAGE;
base_proto = get_base_proto(NULL);
if (!base_proto)
return CMD_RET_FAILURE;
ret = scmi_base_protocol_message_attrs(base_proto,
SCMI_BASE_RESET_AGENT_CONFIGURATION,
&attributes);
if (ret) {
printf("Reset is not supported\n");
return CMD_RET_FAILURE;
}
ret = scmi_base_reset_agent_configuration(base_proto, agent_id, flags);
if (ret) {
printf("Reset failed (%d)\n", ret);
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
static struct cmd_tbl cmd_scmi_sub[] = {
U_BOOT_CMD_MKENT(info, CONFIG_SYS_MAXARGS, 1,
do_scmi_info, "", ""),
U_BOOT_CMD_MKENT(perm_dev, CONFIG_SYS_MAXARGS, 1,
do_scmi_set_dev, "", ""),
U_BOOT_CMD_MKENT(perm_proto, CONFIG_SYS_MAXARGS, 1,
do_scmi_set_proto, "", ""),
U_BOOT_CMD_MKENT(reset, CONFIG_SYS_MAXARGS, 1,
do_scmi_reset, "", ""),
};
/**
* do_scmi() - SCMI utility
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
*
* Provide user interfaces to SCMI protocols.
*
* Return: CMD_RET_SUCCESS on success,
* CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
*/
static int do_scmi(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
struct cmd_tbl *cp;
if (argc < 2)
return CMD_RET_USAGE;
argc--; argv++;
cp = find_cmd_tbl(argv[0], cmd_scmi_sub, ARRAY_SIZE(cmd_scmi_sub));
if (!cp)
return CMD_RET_USAGE;
return cp->cmd(cmdtp, flag, argc, argv);
}
U_BOOT_LONGHELP(scmi,
" - SCMI utility\n"
" info - get the info of SCMI services\n"
" perm_dev <agent-id in hex> <device-id in hex> <flags in hex>\n"
" - set access permission to device\n"
" perm_proto <agent-id in hex> <device-id in hex> <protocol-id in hex> <flags in hex>\n"
" - set protocol permission to device\n"
" reset <agent-id in hex> <flags in hex>\n"
" - reset platform resource settings\n");
U_BOOT_CMD(scmi, CONFIG_SYS_MAXARGS, 0, do_scmi, "SCMI utility",
scmi_help_text);