c07f8fbe6f
* Remove 2nd software stack in pc80 drivers directory. * Create TSPI interface for common usage. * Refactor TSS / TIS code base. * Add vendor tss (Cr50) directory. * Change kconfig options for TPM to TPM1. * Add user / board configuration with: * MAINBOARD_HAS_*_TPM # * BUS driver * MAINBOARD_HAS_TPM1 or MAINBOARD_HAS_TPM2 * Add kconfig TPM user selection (e.g. pluggable TPMs) * Fix existing headers and function calls. * Fix vboot for interface usage and antirollback mode. Change-Id: I7ec277e82a3c20c62a0548a1a2b013e6ce8f5b3f Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org> Reviewed-on: https://review.coreboot.org/24903 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2011 Google Inc.
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*
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* This program 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; version 2 of the License.
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*
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* This program 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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#ifndef TIS_H_
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#define TIS_H_
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#include <stddef.h>
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#include <stdint.h>
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enum tis_access {
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TPM_ACCESS_VALID = (1 << 7),
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TPM_ACCESS_ACTIVE_LOCALITY = (1 << 5),
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TPM_ACCESS_REQUEST_PENDING = (1 << 2),
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TPM_ACCESS_REQUEST_USE = (1 << 1),
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TPM_ACCESS_ESTABLISHMENT = (1 << 0),
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};
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enum tis_status {
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TPM_STS_FAMILY_SHIFT = 26,
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TPM_STS_FAMILY_MASK = (0x3 << TPM_STS_FAMILY_SHIFT),
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TPM_STS_FAMILY_TPM_2_0 = (1 << TPM_STS_FAMILY_SHIFT),
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TPM_STS_FAMILY_TPM_1_2 = (0 << TPM_STS_FAMILY_SHIFT),
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TPM_STS_RESET_ESTABLISHMENT = (1 << 25),
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TPM_STS_COMMAND_CANCEL = (1 << 24),
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TPM_STS_BURST_COUNT_SHIFT = 8,
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TPM_STS_BURST_COUNT_MASK = (0xFFFF << TPM_STS_BURST_COUNT_SHIFT),
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TPM_STS_VALID = (1 << 7),
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TPM_STS_COMMAND_READY = (1 << 6),
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TPM_STS_GO = (1 << 5),
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TPM_STS_DATA_AVAIL = (1 << 4),
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TPM_STS_DATA_EXPECT = (1 << 3),
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TPM_STS_SELF_TEST_DONE = (1 << 2),
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TPM_STS_RESPONSE_RETRY = (1 << 1),
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};
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/*
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* tis_init()
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*
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* Initialize the TPM device. Returns 0 on success or -1 on
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* failure (in case device probing did not succeed).
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*/
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int tis_init(void);
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/*
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* tis_open()
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*
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* Requests access to locality 0 for the caller. After all commands have been
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* completed the caller is supposed to call tis_close().
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*
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* Returns 0 on success, -1 on failure.
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*/
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int tis_open(void);
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/*
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* tis_close()
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*
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* terminate the currect session with the TPM by releasing the locked
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* locality. Returns 0 on success of -1 on failure (in case lock
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* removal did not succeed).
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*/
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int tis_close(void);
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/*
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* tis_sendrecv()
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*
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* Send the requested data to the TPM and then try to get its response
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*
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* @sendbuf - buffer of the data to send
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* @send_size size of the data to send
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* @recvbuf - memory to save the response to
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* @recv_len - pointer to the size of the response buffer
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*
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* Returns 0 on success (and places the number of response bytes at recv_len)
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* or -1 on failure.
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*/
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int tis_sendrecv(const u8 *sendbuf, size_t send_size, u8 *recvbuf,
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size_t *recv_len);
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/*
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* tis_plat_irq_status()
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*
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* Check tpm irq and clear it.
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*
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* Returns 1 when irq pending or 0 when not.
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*/
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int tis_plat_irq_status(void);
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#endif /* TIS_H_ */
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