6a0bc3522e
For boot with OP-TEE on STM32MP13, the communication with the secure world no more use STMicroelectronics SMC but communication with the STM32MP BSEC TA, for data access (read/write) or lock operation: - all the request are sent to OP-TEE trusted application, - for upper OTP with ECC protection and with word programming only each OTP are permanently locked when programmed to avoid ECC error on the second write operation Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20230206134356.839737-18-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* OP-TEE STM32MP BSEC PTA interface, used by STM32 ROMEM driver
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*
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* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
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*/
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#if IS_ENABLED(CONFIG_NVMEM_STM32_BSEC_OPTEE_TA)
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/**
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* stm32_bsec_optee_ta_open() - initialize the STM32 BSEC TA
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* @ctx: the OP-TEE context on success
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*
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* Return:
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* On success, 0. On failure, -errno.
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*/
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int stm32_bsec_optee_ta_open(struct tee_context **ctx);
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/**
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* stm32_bsec_optee_ta_close() - release the STM32 BSEC TA
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* @ctx: the OP-TEE context
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*
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* This function used to clean the OP-TEE resources initialized in
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* stm32_bsec_optee_ta_open(); it can be used as callback to
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* devm_add_action_or_reset()
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*/
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void stm32_bsec_optee_ta_close(void *ctx);
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/**
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* stm32_bsec_optee_ta_read() - nvmem read access using TA client driver
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* @ctx: the OP-TEE context provided by stm32_bsec_optee_ta_open
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* @offset: nvmem offset
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* @buf: buffer to fill with nvem values
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* @bytes: number of bytes to read
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*
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* Return:
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* On success, 0. On failure, -errno.
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*/
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int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset,
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void *buf, size_t bytes);
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/**
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* stm32_bsec_optee_ta_write() - nvmem write access using TA client driver
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* @ctx: the OP-TEE context provided by stm32_bsec_optee_ta_open
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* @lower: number of lower OTP, not protected by ECC
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* @offset: nvmem offset
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* @buf: buffer with nvem values
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* @bytes: number of bytes to write
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*
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* Return:
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* On success, 0. On failure, -errno.
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*/
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int stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower,
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unsigned int offset, void *buf, size_t bytes);
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#else
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static inline int stm32_bsec_optee_ta_open(struct tee_context **ctx)
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{
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return -EOPNOTSUPP;
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}
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static inline void stm32_bsec_optee_ta_close(void *ctx)
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{
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}
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static inline int stm32_bsec_optee_ta_read(struct tee_context *ctx,
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unsigned int offset, void *buf,
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size_t bytes)
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{
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return -EOPNOTSUPP;
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}
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static inline int stm32_bsec_optee_ta_write(struct tee_context *ctx,
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unsigned int lower,
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unsigned int offset, void *buf,
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size_t bytes)
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{
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return -EOPNOTSUPP;
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}
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#endif /* CONFIG_NVMEM_STM32_BSEC_OPTEE_TA */
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