xref: /arm-trusted-firmware/include/drivers/st/bsec.h (revision 91f16700b400a8c0651d24a598fc48ee2997a0d7)

/*
 * Copyright (c) 2017-2022, STMicroelectronics - All Rights Reserved
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef BSEC_H
#define BSEC_H

#include <stdbool.h>
#include <stdint.h>

#include <lib/utils_def.h>

/*
 * IP configuration
 */
#define BSEC_OTP_MASK			GENMASK(4, 0)
#define BSEC_OTP_BANK_SHIFT		5
#define BSEC_TIMEOUT_VALUE		0xFFFF

/*
 * Return status
 */
#define BSEC_OK				0U
#define BSEC_ERROR			0xFFFFFFFFU
#define BSEC_DISTURBED			0xFFFFFFFEU
#define BSEC_INVALID_PARAM		0xFFFFFFFCU
#define BSEC_PROG_FAIL			0xFFFFFFFBU
#define BSEC_LOCK_FAIL			0xFFFFFFFAU
#define BSEC_TIMEOUT			0xFFFFFFF9U
#define BSEC_RETRY			0xFFFFFFF8U
#define BSEC_NOT_SUPPORTED		0xFFFFFFF7U
#define BSEC_WRITE_LOCKED		0xFFFFFFF6U
#define BSEC_ERROR_INVALID_FVR		0xFFFFFFF5U

/*
 * OTP MODE
 */
#define BSEC_MODE_OPEN1			0x00U
#define BSEC_MODE_SECURED		0x01U
#define BSEC_MODE_OPEN2			0x02U
#define BSEC_MODE_INVALID		0x04U

/*
 * OTP Lock services definition.
 * Value must corresponding to the bit number in the register.
 * Special case: (bit number << 1) for BSEC3.
 */
#define BSEC_LOCK_UPPER_OTP		0x00
#define BSEC_LOCK_GWLOCK		0x01
#define BSEC_LOCK_DEBUG			0x02
#define BSEC_LOCK_PROGRAM		0x03
#define BSEC_LOCK_KVLOCK		0x04

/*
 * Values for struct bsec_config::freq
 */
#define FREQ_10_20_MHZ			0x0
#define FREQ_20_30_MHZ			0x1
#define FREQ_30_45_MHZ			0x2
#define FREQ_45_67_MHZ			0x3

/*
 * Device info structure, providing device-specific functions and a means of
 * adding driver-specific state.
 */
struct bsec_config {
	uint8_t den_lock;	/*
				 * Debug enable sticky lock
				 * 1 debug enable is locked until next reset
				 */

	/*  BSEC2 only */
	uint8_t tread;		/* SAFMEM Reading current level default 0 */
	uint8_t pulse_width;	/* SAFMEM Programming pulse width default 1 */
	uint8_t freq;		/*
				 * SAFMEM CLOCK see freq value define
				 * default FREQ_45_67_MHZ
				 */
	uint8_t power;		/* Power up SAFMEM. 1 power up, 0 power off */
	uint8_t prog_lock;	/*
				 * Programming Sticky lock
				 * 1 programming is locked until next reset
				 */
	uint8_t upper_otp_lock;	/*
				 * Shadowing of upper OTP sticky lock
				 * 1 shadowing of upper OTP is locked
				 * until next reset
				 */
};

uint32_t bsec_probe(void);
uint32_t bsec_get_base(void);

uint32_t bsec_set_config(struct bsec_config *cfg);
uint32_t bsec_get_config(struct bsec_config *cfg);

uint32_t bsec_shadow_register(uint32_t otp);
uint32_t bsec_read_otp(uint32_t *val, uint32_t otp);
uint32_t bsec_write_otp(uint32_t val, uint32_t otp);
uint32_t bsec_program_otp(uint32_t val, uint32_t otp);
uint32_t bsec_permanent_lock_otp(uint32_t otp);

void bsec_write_debug_conf(uint32_t val);
uint32_t bsec_read_debug_conf(void);

void bsec_write_scratch(uint32_t val);
uint32_t bsec_read_scratch(void);

uint32_t bsec_get_status(void);
uint32_t bsec_get_hw_conf(void);
uint32_t bsec_get_version(void);
uint32_t bsec_get_id(void);
uint32_t bsec_get_magic_id(void);

uint32_t bsec_set_sr_lock(uint32_t otp);
uint32_t bsec_read_sr_lock(uint32_t otp, bool *value);
uint32_t bsec_set_sw_lock(uint32_t otp);
uint32_t bsec_read_sw_lock(uint32_t otp, bool *value);
uint32_t bsec_set_sp_lock(uint32_t otp);
uint32_t bsec_read_sp_lock(uint32_t otp, bool *value);
uint32_t bsec_read_permanent_lock(uint32_t otp, bool *value);
uint32_t bsec_otp_lock(uint32_t service);

uint32_t bsec_shadow_read_otp(uint32_t *otp_value, uint32_t word);
uint32_t bsec_check_nsec_access_rights(uint32_t otp);

#endif /* BSEC_H */