81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* OP-TEE STM32MP BSEC PTA interface, used by STM32 ROMEM driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_NVMEM_STM32_BSEC_OPTEE_TA)
|
||
|
|
/**
|
||
|
|
* stm32_bsec_optee_ta_open() - initialize the STM32 BSEC TA
|
||
|
|
* @ctx: the OP-TEE context on success
|
||
|
|
*
|
||
|
|
* Return:
|
||
|
|
* On success, 0. On failure, -errno.
|
||
|
|
*/
|
||
|
|
int stm32_bsec_optee_ta_open(struct tee_context **ctx);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* stm32_bsec_optee_ta_close() - release the STM32 BSEC TA
|
||
|
|
* @ctx: the OP-TEE context
|
||
|
|
*
|
||
|
|
* This function used to clean the OP-TEE resources initialized in
|
||
|
|
* stm32_bsec_optee_ta_open(); it can be used as callback to
|
||
|
|
* devm_add_action_or_reset()
|
||
|
|
*/
|
||
|
|
void stm32_bsec_optee_ta_close(void *ctx);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* stm32_bsec_optee_ta_read() - nvmem read access using TA client driver
|
||
|
|
* @ctx: the OP-TEE context provided by stm32_bsec_optee_ta_open
|
||
|
|
* @offset: nvmem offset
|
||
|
|
* @buf: buffer to fill with nvem values
|
||
|
|
* @bytes: number of bytes to read
|
||
|
|
*
|
||
|
|
* Return:
|
||
|
|
* On success, 0. On failure, -errno.
|
||
|
|
*/
|
||
|
|
int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset,
|
||
|
|
void *buf, size_t bytes);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* stm32_bsec_optee_ta_write() - nvmem write access using TA client driver
|
||
|
|
* @ctx: the OP-TEE context provided by stm32_bsec_optee_ta_open
|
||
|
|
* @lower: number of lower OTP, not protected by ECC
|
||
|
|
* @offset: nvmem offset
|
||
|
|
* @buf: buffer with nvem values
|
||
|
|
* @bytes: number of bytes to write
|
||
|
|
*
|
||
|
|
* Return:
|
||
|
|
* On success, 0. On failure, -errno.
|
||
|
|
*/
|
||
|
|
int stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower,
|
||
|
|
unsigned int offset, void *buf, size_t bytes);
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static inline int stm32_bsec_optee_ta_open(struct tee_context **ctx)
|
||
|
|
{
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stm32_bsec_optee_ta_close(void *ctx)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int stm32_bsec_optee_ta_read(struct tee_context *ctx,
|
||
|
|
unsigned int offset, void *buf,
|
||
|
|
size_t bytes)
|
||
|
|
{
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int stm32_bsec_optee_ta_write(struct tee_context *ctx,
|
||
|
|
unsigned int lower,
|
||
|
|
unsigned int offset, void *buf,
|
||
|
|
size_t bytes)
|
||
|
|
{
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_NVMEM_STM32_BSEC_OPTEE_TA */
|