u-boot/drivers/tee/optee/optee_private.h
Jorge Ramirez-Ortiz 4e96356185 drivers: tee: i2c trampoline driver
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>
2021-02-16 11:48:20 -05:00

82 lines
2.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2018 Linaro Limited
*/
#ifndef __OPTEE_PRIVATE_H
#define __OPTEE_PRIVATE_H
#include <tee.h>
#include <log.h>
/**
* struct optee_private - OP-TEE driver private data
* @rpmb_mmc: mmc device for the RPMB partition
* @rpmb_dev_id: mmc device id matching @rpmb_mmc
* @rpmb_original_part: the previosly active partition on the mmc device,
* used to restore active the partition when the RPMB
* accesses are finished
*/
struct optee_private {
struct mmc *rpmb_mmc;
int rpmb_dev_id;
int rpmb_original_part;
};
struct optee_msg_arg;
void optee_suppl_cmd(struct udevice *dev, struct tee_shm *shm_arg,
void **page_list);
#ifdef CONFIG_SUPPORT_EMMC_RPMB
/**
* optee_suppl_cmd_rpmb() - route RPMB frames to mmc
* @dev: device with the selected RPMB partition
* @arg: OP-TEE message holding the frames to transmit to the mmc
* and space for the response frames.
*
* Routes signed (MACed) RPMB frames from OP-TEE Secure OS to MMC and vice
* versa to manipulate the RPMB partition.
*/
void optee_suppl_cmd_rpmb(struct udevice *dev, struct optee_msg_arg *arg);
/**
* optee_suppl_rpmb_release() - release mmc device
* @dev: mmc device
*
* Releases the mmc device and restores the previously selected partition.
*/
void optee_suppl_rpmb_release(struct udevice *dev);
#else
static inline void optee_suppl_cmd_rpmb(struct udevice *dev,
struct optee_msg_arg *arg)
{
debug("OPTEE_MSG_RPC_CMD_RPMB not implemented\n");
arg->ret = TEE_ERROR_NOT_IMPLEMENTED;
}
static inline void optee_suppl_rpmb_release(struct udevice *dev)
{
}
#endif
#ifdef CONFIG_DM_I2C
/**
* optee_suppl_cmd_i2c_transfer() - route I2C requests to an I2C chip
* @arg: OP-TEE message (layout specified in optee_msg.h) defining the
* transfer mode (read/write), adapter, chip and control flags.
*
* Handles OP-TEE requests to transfer data to the I2C chip on the I2C adapter.
*/
void optee_suppl_cmd_i2c_transfer(struct optee_msg_arg *arg);
#else
static inline void optee_suppl_cmd_i2c_transfer(struct optee_msg_arg *arg)
{
debug("OPTEE_MSG_RPC_CMD_I2C_TRANSFER not implemented\n");
arg->ret = TEE_ERROR_NOT_IMPLEMENTED;
}
#endif
void *optee_alloc_and_init_page_list(void *buf, ulong len, u64 *phys_buf_ptr);
#endif /* __OPTEE_PRIVATE_H */