mirror of https://github.com/wolfSSL/wolfTPM.git
108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/* tpm_io_microchip.c
|
|
*
|
|
* Copyright (C) 2006-2024 wolfSSL Inc.
|
|
*
|
|
* This file is part of wolfTPM.
|
|
*
|
|
* wolfTPM is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* wolfTPM is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
|
*/
|
|
|
|
/* This example shows IO interfaces for Microchip micro-controllers using
|
|
* MPLAB X and Harmony
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <wolftpm/tpm2.h>
|
|
#include <wolftpm/tpm2_tis.h>
|
|
#include "tpm_io.h"
|
|
|
|
/******************************************************************************/
|
|
/* --- BEGIN IO Callback Logic -- */
|
|
/******************************************************************************/
|
|
|
|
/* Included via tpm_io.c if WOLFTPM_INCLUDE_IO_FILE is defined */
|
|
#ifdef WOLFTPM_INCLUDE_IO_FILE
|
|
|
|
#if ! (defined(WOLFTPM_LINUX_DEV) || \
|
|
defined(WOLFTPM_SWTPM) || \
|
|
defined(WOLFTPM_WINAPI) )
|
|
|
|
/* Use the max speed by default - see tpm2_types.h for chip specific max values */
|
|
#ifndef TPM2_SPI_HZ
|
|
#define TPM2_SPI_HZ TPM2_SPI_MAX_HZ
|
|
#endif
|
|
|
|
#if defined(WOLFTPM_MICROCHIP_HARMONY)
|
|
|
|
#ifdef WOLFTPM_CHECK_WAIT_STATE
|
|
#error This driver does not support check wait state yet
|
|
#endif
|
|
|
|
#include "configuration.h"
|
|
#include "definitions.h"
|
|
|
|
/* TPM Chip Select Pin (default PC5) */
|
|
#ifndef TPM_SPI_PIN
|
|
#define SYS_PORT_PIN_PC5
|
|
#endif
|
|
|
|
int TPM2_IoCb_Microchip_SPI(TPM2_CTX* ctx, const byte* txBuf, byte* rxBuf,
|
|
word16 xferSz, void* userCtx)
|
|
{
|
|
int ret = TPM_RC_FAILURE;
|
|
DRV_HANDLE handle = DRV_HANDLE_INVALID;
|
|
DRV_SPI_TRANSFER_SETUP setup;
|
|
|
|
/* Setup SPI */
|
|
handle = DRV_SPI_Open(DRV_SPI_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
|
|
if (handle == DRV_HANDLE_INVALID) {
|
|
return TPM_RC_FAILURE;
|
|
}
|
|
|
|
memset(&setup, 0, sizeof(setup));
|
|
setup.baudRateInHz = TPM2_SPI_HZ;
|
|
setup.clockPhase = DRV_SPI_CLOCK_PHASE_VALID_TRAILING_EDGE;
|
|
setup.clockPolarity = DRV_SPI_CLOCK_POLARITY_IDLE_LOW;
|
|
setup.dataBits = DRV_SPI_DATA_BITS_8;
|
|
setup.chipSelect = TPM_SPI_PIN;
|
|
setup.csPolarity = DRV_SPI_CS_POLARITY_ACTIVE_LOW;
|
|
DRV_SPI_TransferSetup(handle, &setup);
|
|
|
|
/* Send Entire Message blocking - no wait states */
|
|
if (DRV_SPI_WriteReadTransfer(handle, (byte*)txBuf, xferSz, rxBuf,
|
|
xferSz) == true) {
|
|
ret = TPM_RC_SUCCESS
|
|
}
|
|
|
|
(void)ctx;
|
|
(void)userCtx;
|
|
|
|
DRV_SPI_Close(handle);
|
|
handle = DRV_HANDLE_INVALID;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* WOLFTPM_MICROCHIP_HARMONY */
|
|
#endif /* !(WOLFTPM_LINUX_DEV || WOLFTPM_SWTPM || WOLFTPM_WINAPI) */
|
|
#endif /* WOLFTPM_INCLUDE_IO_FILE */
|
|
|
|
/******************************************************************************/
|
|
/* --- END IO Callback Logic -- */
|
|
/******************************************************************************/
|