mirror of https://github.com/wolfSSL/wolfTPM.git
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/* tpm_io_barebox.c
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*
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* Copyright (C) 2006-2024 wolfSSL Inc.
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*
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* This file is part of wolfTPM.
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*
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* wolfTPM is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfTPM is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/* This example shows IO interfaces for Barebox */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <wolftpm/tpm2.h>
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#include <wolftpm/tpm2_tis.h>
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#include "tpm_io.h"
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/******************************************************************************/
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/* --- BEGIN IO Callback Logic -- */
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/******************************************************************************/
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/* Included via tpm_io.c if WOLFTPM_INCLUDE_IO_FILE is defined */
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#ifdef WOLFTPM_INCLUDE_IO_FILE
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#if ! (defined(WOLFTPM_LINUX_DEV) || \
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defined(WOLFTPM_SWTPM) || \
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defined(WOLFTPM_WINAPI) )
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/* Use the max speed by default - see tpm2_types.h for chip specific max values */
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#ifndef TPM2_SPI_HZ
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#define TPM2_SPI_HZ TPM2_SPI_MAX_HZ
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#endif
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#if defined(__BAREBOX__)
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#include <spi/spi.h>
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#include <spi/spi_gpio.h>
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int TPM2_IoCb_Barebox_SPI(TPM2_CTX* ctx, const byte* txBuf,
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byte* rxBuf, word16 xferSz, void* userCtx)
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{
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int ret = TPM_RC_FAILURE;
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struct spi_device spi;
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int bus = 0;
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struct spi_transfer t;
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struct spi_message m;
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#ifdef WOLFTPM_CHECK_WAIT_STATE
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#error SPI check wait state logic not supported for BareBox
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#endif
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XMEMSET(&spi, 0, sizeof(spi));
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spi.master = spi_get_master(bus); /* get bus 0 master */
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spi.max_speed_hz = 1 * 1000 * 1000; /* 1 MHz */
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spi.mode = 0; /* Mode 0 (CPOL=0, CPHA=0) */
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spi.bits_per_word = 8; /* 8-bits */
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spi.chip_select = 0; /* Use CS 0 */
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/* setup SPI master */
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ret = spi.master->setup(&spi);
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/* setup transfer */
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XMEMSET(&t, 0, sizeof(t));
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t.tx_buf = txBuf;
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t.rx_buf = rxBuf;
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t.len = xferSz;
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spi_message_init(&m);
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spi_message_add_tail(&t, &m);
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ret = spi_sync(&spi, &m);
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if (ret == 0)
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ret = TPM_RC_SUCCESS;
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(void)userCtx;
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(void)ctx;
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return ret;
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}
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#endif
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#endif /* !(WOLFTPM_LINUX_DEV || WOLFTPM_SWTPM || WOLFTPM_WINAPI) */
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#endif /* WOLFTPM_INCLUDE_IO_FILE */
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/******************************************************************************/
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/* --- END IO Callback Logic -- */
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/******************************************************************************/
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