blob: daa495e4fff78f38835c54b29b895f28851c3864 [file] [log] [blame]
/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <lib/mmio.h>
#include <plat/common/platform.h>
#include <platform_def.h>
#include <string.h>
#include "gxl_private.h"
#define SIZE_SHIFT 20
#define SIZE_MASK 0x1FF
/*
* Note: The Amlogic SCP firmware uses the legacy SCPI protocol.
*/
#define SCPI_CMD_SET_CSS_POWER_STATE 0x04
#define SCPI_CMD_SET_SYS_POWER_STATE 0x08
#define SCPI_CMD_JTAG_SET_STATE 0xC0
#define SCPI_CMD_EFUSE_READ 0xC2
static inline uint32_t scpi_cmd(uint32_t command, uint32_t size)
{
return command | (size << SIZE_SHIFT);
}
void scpi_secure_message_send(uint32_t command, uint32_t size)
{
mhu_secure_message_send(scpi_cmd(command, size));
}
uint32_t scpi_secure_message_receive(void **message_out, size_t *size_out)
{
uint32_t response = mhu_secure_message_wait();
size_t size = (response >> SIZE_SHIFT) & SIZE_MASK;
response &= ~(SIZE_MASK << SIZE_SHIFT);
if (size_out != NULL)
*size_out = size;
if (message_out != NULL)
*message_out = (void *)GXBB_MHU_SECURE_SCP_TO_AP_PAYLOAD;
return response;
}
void scpi_set_css_power_state(u_register_t mpidr, uint32_t cpu_state,
uint32_t cluster_state, uint32_t css_state)
{
uint32_t state = (mpidr & 0x0F) | /* CPU ID */
((mpidr & 0xF00) >> 4) | /* Cluster ID */
(cpu_state << 8) |
(cluster_state << 12) |
(css_state << 16);
mhu_secure_message_start();
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD, state);
mhu_secure_message_send(scpi_cmd(SCPI_CMD_SET_CSS_POWER_STATE, 4));
mhu_secure_message_wait();
mhu_secure_message_end();
}
uint32_t scpi_sys_power_state(uint64_t system_state)
{
uint32_t *response;
size_t size;
mhu_secure_message_start();
mmio_write_8(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD, system_state);
mhu_secure_message_send(scpi_cmd(SCPI_CMD_SET_SYS_POWER_STATE, 1));
scpi_secure_message_receive((void *)&response, &size);
mhu_secure_message_end();
return *response;
}
void scpi_jtag_set_state(uint32_t state, uint8_t select)
{
assert(state <= GXBB_JTAG_STATE_OFF);
if (select > GXBB_JTAG_A53_EE) {
WARN("BL31: Invalid JTAG select (0x%x).\n", select);
return;
}
mhu_secure_message_start();
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD,
(state << 8) | (uint32_t)select);
mhu_secure_message_send(scpi_cmd(SCPI_CMD_JTAG_SET_STATE, 4));
mhu_secure_message_wait();
mhu_secure_message_end();
}
uint32_t scpi_efuse_read(void *dst, uint32_t base, uint32_t size)
{
uint32_t *response;
size_t resp_size;
if (size > 0x1FC)
return 0;
mhu_secure_message_start();
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD, base);
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD + 4, size);
mhu_secure_message_send(scpi_cmd(SCPI_CMD_EFUSE_READ, 8));
scpi_secure_message_receive((void *)&response, &resp_size);
mhu_secure_message_end();
/*
* response[0] is the size of the response message.
* response[1 ... N] are the contents.
*/
if (*response != 0)
memcpy(dst, response + 1, *response);
return *response;
}
void scpi_unknown_thermal(uint32_t arg0, uint32_t arg1,
uint32_t arg2, uint32_t arg3)
{
mhu_secure_message_start();
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0x0, arg0);
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0x4, arg1);
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0x8, arg2);
mmio_write_32(GXBB_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0xC, arg3);
mhu_secure_message_send(scpi_cmd(0xC3, 16));
mhu_secure_message_wait();
mhu_secure_message_end();
}