diff options
Diffstat (limited to 'plat/amlogic/common/aml_scpi.c')
| -rw-r--r-- | plat/amlogic/common/aml_scpi.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/plat/amlogic/common/aml_scpi.c b/plat/amlogic/common/aml_scpi.c new file mode 100644 index 0000000..c8a6772 --- /dev/null +++ b/plat/amlogic/common/aml_scpi.c @@ -0,0 +1,234 @@ +/* + * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <crypto/sha_dma.h> +#include <lib/mmio.h> +#include <plat/common/platform.h> +#include <platform_def.h> +#include <string.h> + +#include "aml_private.h" + +#define SIZE_SHIFT 20 +#define SIZE_MASK 0x1FF +#define SIZE_FWBLK 0x200UL + +/* + * 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 +#define SCPI_CMD_CHIP_ID 0xC6 + +#define SCPI_CMD_COPY_FW 0xd4 +#define SCPI_CMD_SET_FW_ADDR 0xd3 +#define SCPI_CMD_FW_SIZE 0xd2 + +static inline uint32_t aml_scpi_cmd(uint32_t command, uint32_t size) +{ + return command | (size << SIZE_SHIFT); +} + +static void aml_scpi_secure_message_send(uint32_t command, uint32_t size) +{ + aml_mhu_secure_message_send(aml_scpi_cmd(command, size)); +} + +static uint32_t aml_scpi_secure_message_receive(void **message_out, size_t *size_out) +{ + uint32_t response = aml_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 *)AML_MHU_SECURE_SCP_TO_AP_PAYLOAD; + + return response; +} + +void aml_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); + + aml_mhu_secure_message_start(); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD, state); + aml_mhu_secure_message_send(aml_scpi_cmd(SCPI_CMD_SET_CSS_POWER_STATE, 4)); + aml_mhu_secure_message_wait(); + aml_mhu_secure_message_end(); +} + +uint32_t aml_scpi_sys_power_state(uint64_t system_state) +{ + uint32_t *response; + size_t size; + + aml_mhu_secure_message_start(); + mmio_write_8(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD, system_state); + aml_mhu_secure_message_send(aml_scpi_cmd(SCPI_CMD_SET_SYS_POWER_STATE, 1)); + aml_scpi_secure_message_receive((void *)&response, &size); + aml_mhu_secure_message_end(); + + return *response; +} + +void aml_scpi_jtag_set_state(uint32_t state, uint8_t select) +{ + assert(state <= AML_JTAG_STATE_OFF); + + if (select > AML_JTAG_A53_EE) { + WARN("BL31: Invalid JTAG select (0x%x).\n", select); + return; + } + + aml_mhu_secure_message_start(); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD, + (state << 8) | (uint32_t)select); + aml_mhu_secure_message_send(aml_scpi_cmd(SCPI_CMD_JTAG_SET_STATE, 4)); + aml_mhu_secure_message_wait(); + aml_mhu_secure_message_end(); +} + +uint32_t aml_scpi_efuse_read(void *dst, uint32_t base, uint32_t size) +{ + uint32_t *response; + size_t resp_size; + + if (size > 0x1FC) + return 0; + + aml_mhu_secure_message_start(); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD, base); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD + 4, size); + aml_mhu_secure_message_send(aml_scpi_cmd(SCPI_CMD_EFUSE_READ, 8)); + aml_scpi_secure_message_receive((void *)&response, &resp_size); + aml_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 aml_scpi_unknown_thermal(uint32_t arg0, uint32_t arg1, + uint32_t arg2, uint32_t arg3) +{ + aml_mhu_secure_message_start(); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0x0, arg0); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0x4, arg1); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0x8, arg2); + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD + 0xC, arg3); + aml_mhu_secure_message_send(aml_scpi_cmd(0xC3, 16)); + aml_mhu_secure_message_wait(); + aml_mhu_secure_message_end(); +} + +uint32_t aml_scpi_get_chip_id(uint8_t *obuff, uint32_t osize) +{ + uint32_t *response; + size_t resp_size; + + if ((osize != 16) && (osize != 12)) + return 0; + + aml_mhu_secure_message_start(); + aml_mhu_secure_message_send(aml_scpi_cmd(SCPI_CMD_CHIP_ID, osize)); + aml_scpi_secure_message_receive((void *)&response, &resp_size); + aml_mhu_secure_message_end(); + + if (!((resp_size == 16) && (osize == 16)) && + !((resp_size == 0) && (osize == 12))) + return 0; + + memcpy((void *)obuff, (const void *)response, osize); + + return osize; +} + +static inline void aml_scpi_copy_scp_data(uint8_t *data, size_t len) +{ + void *dst = (void *)AML_MHU_SECURE_AP_TO_SCP_PAYLOAD; + size_t sz; + + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD, len); + aml_scpi_secure_message_send(SCPI_CMD_FW_SIZE, len); + aml_mhu_secure_message_wait(); + + for (sz = 0; sz < len; sz += SIZE_FWBLK) { + memcpy(dst, data + sz, MIN(SIZE_FWBLK, len - sz)); + aml_mhu_secure_message_send(SCPI_CMD_COPY_FW); + } +} + +static inline void aml_scpi_set_scp_addr(uint64_t addr, size_t len) +{ + volatile uint64_t *dst = (uint64_t *)AML_MHU_SECURE_AP_TO_SCP_PAYLOAD; + + /* + * It is ok as AML_MHU_SECURE_AP_TO_SCP_PAYLOAD is mapped as + * non cachable + */ + *dst = addr; + aml_scpi_secure_message_send(SCPI_CMD_SET_FW_ADDR, sizeof(addr)); + aml_mhu_secure_message_wait(); + + mmio_write_32(AML_MHU_SECURE_AP_TO_SCP_PAYLOAD, len); + aml_scpi_secure_message_send(SCPI_CMD_FW_SIZE, len); + aml_mhu_secure_message_wait(); +} + +static inline void aml_scpi_send_fw_hash(uint8_t hash[], size_t len) +{ + void *dst = (void *)AML_MHU_SECURE_AP_TO_SCP_PAYLOAD; + + memcpy(dst, hash, len); + aml_mhu_secure_message_send(0xd0); + aml_mhu_secure_message_send(0xd1); + aml_mhu_secure_message_send(0xd5); + aml_mhu_secure_message_end(); +} + +/** + * Upload a FW to SCP. + * + * @param addr: firmware data address + * @param size: size of firmware + * @param send: If set, actually copy the firmware in SCP memory otherwise only + * send the firmware address. + */ +void aml_scpi_upload_scp_fw(uintptr_t addr, size_t size, int send) +{ + struct asd_ctx ctx; + + asd_sha_init(&ctx, ASM_SHA256); + asd_sha_update(&ctx, (void *)addr, size); + asd_sha_finalize(&ctx); + + aml_mhu_secure_message_start(); + if (send == 0) + aml_scpi_set_scp_addr(addr, size); + else + aml_scpi_copy_scp_data((void *)addr, size); + + aml_scpi_send_fw_hash(ctx.digest, sizeof(ctx.digest)); +} |