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4e96356185
This commit gives the secure world access to the I2C bus so it can
communicate with I2C slaves (typically those would be secure elements
like the NXP SE050).
A similar service implementation has been merged in linux:
c05210ab ("drivers: optee: allow op-tee to access devices on the i2c
bus")
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2018 Linaro Limited
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*/
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#ifndef __OPTEE_PRIVATE_H
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#define __OPTEE_PRIVATE_H
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#include <tee.h>
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#include <log.h>
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/**
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* struct optee_private - OP-TEE driver private data
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* @rpmb_mmc: mmc device for the RPMB partition
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* @rpmb_dev_id: mmc device id matching @rpmb_mmc
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* @rpmb_original_part: the previosly active partition on the mmc device,
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* used to restore active the partition when the RPMB
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* accesses are finished
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*/
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struct optee_private {
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struct mmc *rpmb_mmc;
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int rpmb_dev_id;
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int rpmb_original_part;
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};
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struct optee_msg_arg;
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void optee_suppl_cmd(struct udevice *dev, struct tee_shm *shm_arg,
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void **page_list);
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#ifdef CONFIG_SUPPORT_EMMC_RPMB
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/**
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* optee_suppl_cmd_rpmb() - route RPMB frames to mmc
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* @dev: device with the selected RPMB partition
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* @arg: OP-TEE message holding the frames to transmit to the mmc
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* and space for the response frames.
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*
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* Routes signed (MACed) RPMB frames from OP-TEE Secure OS to MMC and vice
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* versa to manipulate the RPMB partition.
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*/
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void optee_suppl_cmd_rpmb(struct udevice *dev, struct optee_msg_arg *arg);
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/**
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* optee_suppl_rpmb_release() - release mmc device
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* @dev: mmc device
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*
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* Releases the mmc device and restores the previously selected partition.
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*/
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void optee_suppl_rpmb_release(struct udevice *dev);
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#else
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static inline void optee_suppl_cmd_rpmb(struct udevice *dev,
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struct optee_msg_arg *arg)
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{
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debug("OPTEE_MSG_RPC_CMD_RPMB not implemented\n");
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arg->ret = TEE_ERROR_NOT_IMPLEMENTED;
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}
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static inline void optee_suppl_rpmb_release(struct udevice *dev)
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{
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}
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#endif
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#ifdef CONFIG_DM_I2C
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/**
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* optee_suppl_cmd_i2c_transfer() - route I2C requests to an I2C chip
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* @arg: OP-TEE message (layout specified in optee_msg.h) defining the
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* transfer mode (read/write), adapter, chip and control flags.
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*
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* Handles OP-TEE requests to transfer data to the I2C chip on the I2C adapter.
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*/
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void optee_suppl_cmd_i2c_transfer(struct optee_msg_arg *arg);
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#else
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static inline void optee_suppl_cmd_i2c_transfer(struct optee_msg_arg *arg)
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{
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debug("OPTEE_MSG_RPC_CMD_I2C_TRANSFER not implemented\n");
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arg->ret = TEE_ERROR_NOT_IMPLEMENTED;
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}
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#endif
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void *optee_alloc_and_init_page_list(void *buf, ulong len, u64 *phys_buf_ptr);
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#endif /* __OPTEE_PRIVATE_H */
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