You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.1 KiB
107 lines
3.1 KiB
/*
|
|
* Copyright (c) 2019-2020, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#ifndef BRCM_SCPI_H
|
|
#define BRCM_SCPI_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/*
|
|
* An SCPI command consists of a header and a payload.
|
|
* The following structure describes the header. It is 64-bit long.
|
|
*/
|
|
typedef struct {
|
|
/* Command ID */
|
|
uint32_t id : 7;
|
|
/* Set ID. Identifies whether this is a standard or extended command. */
|
|
uint32_t set : 1;
|
|
/* Sender ID to match a reply. The value is sender specific. */
|
|
uint32_t sender : 8;
|
|
/* Size of the payload in bytes (0 - 511) */
|
|
uint32_t size : 9;
|
|
uint32_t reserved : 7;
|
|
/*
|
|
* Status indicating the success of a command.
|
|
* See the enum below.
|
|
*/
|
|
uint32_t status;
|
|
} scpi_cmd_t;
|
|
|
|
typedef enum {
|
|
SCPI_SET_NORMAL = 0, /* Normal SCPI commands */
|
|
SCPI_SET_EXTENDED /* Extended SCPI commands */
|
|
} scpi_set_t;
|
|
|
|
enum {
|
|
SCP_OK = 0, /* Success */
|
|
SCP_E_PARAM, /* Invalid parameter(s) */
|
|
SCP_E_ALIGN, /* Invalid alignment */
|
|
SCP_E_SIZE, /* Invalid size */
|
|
SCP_E_HANDLER, /* Invalid handler or callback */
|
|
SCP_E_ACCESS, /* Invalid access or permission denied */
|
|
SCP_E_RANGE, /* Value out of range */
|
|
SCP_E_TIMEOUT, /* Time out has ocurred */
|
|
SCP_E_NOMEM, /* Invalid memory area or pointer */
|
|
SCP_E_PWRSTATE, /* Invalid power state */
|
|
SCP_E_SUPPORT, /* Feature not supported or disabled */
|
|
SCPI_E_DEVICE, /* Device error */
|
|
SCPI_E_BUSY, /* Device is busy */
|
|
};
|
|
|
|
typedef uint32_t scpi_status_t;
|
|
typedef enum {
|
|
SCPI_CMD_SCP_READY = 0x01,
|
|
SCPI_CMD_SET_POWER_STATE = 0x03,
|
|
SCPI_CMD_GET_POWER_STATE = 0x04,
|
|
SCPI_CMD_SYS_POWER_STATE = 0x05
|
|
} scpi_command_t;
|
|
|
|
/*
|
|
* Macros to parse SCP response to GET_POWER_STATE command
|
|
*
|
|
* [3:0] : cluster ID
|
|
* [7:4] : cluster state: 0 = on; 3 = off; rest are reserved
|
|
* [15:8]: on/off state for individual CPUs in the cluster
|
|
*
|
|
* Payload is in little-endian
|
|
*/
|
|
#define CLUSTER_ID(_resp) ((_resp) & 0xf)
|
|
#define CLUSTER_POWER_STATE(_resp) (((_resp) >> 4) & 0xf)
|
|
|
|
/* Result is a bit mask of CPU on/off states in the cluster */
|
|
#define CPU_POWER_STATE(_resp) (((_resp) >> 8) & 0xff)
|
|
|
|
/*
|
|
* For GET_POWER_STATE, SCP returns the power states of every cluster. The
|
|
* size of response depends on the number of clusters in the system. The
|
|
* SCP-to-AP payload contains 2 bytes per cluster. Make sure the response is
|
|
* large enough to contain power states of a given cluster
|
|
*/
|
|
#define CHECK_RESPONSE(_resp, _clus) (_resp.size >= (((_clus) + 1) * 2))
|
|
|
|
typedef enum {
|
|
scpi_power_on = 0,
|
|
scpi_power_retention = 1,
|
|
scpi_power_off = 3,
|
|
} scpi_power_state_t;
|
|
|
|
typedef enum {
|
|
scpi_system_shutdown = 0,
|
|
scpi_system_reboot = 1,
|
|
scpi_system_reset = 2
|
|
} scpi_system_state_t;
|
|
|
|
extern int scpi_wait_ready(void);
|
|
extern void scpi_set_brcm_power_state(unsigned int mpidr,
|
|
scpi_power_state_t cpu_state,
|
|
scpi_power_state_t cluster_state,
|
|
scpi_power_state_t css_state);
|
|
int scpi_get_brcm_power_state(unsigned int mpidr, unsigned int *cpu_state_p,
|
|
unsigned int *cluster_state_p);
|
|
uint32_t scpi_sys_power_state(scpi_system_state_t system_state);
|
|
|
|
#endif /* BRCM_SCPI_H */
|
|
|