mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
130 lines
2.5 KiB
C
130 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2011 Infineon Technologies
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*
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* Authors:
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* Peter Huewe <huewe.external@infineon.com>
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*
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* Version: 2.1.1
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*
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* Description:
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*
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* It is based on the Linux kernel driver tpm.c from Leendert van
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* Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
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*/
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#ifndef _TPM_TIS_I2C_H
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#define _TPM_TIS_I2C_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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enum tpm_timeout {
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TPM_TIMEOUT_MS = 5,
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TIS_SHORT_TIMEOUT_MS = 750,
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TIS_LONG_TIMEOUT_MS = 2000,
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SLEEP_DURATION_US = 60,
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SLEEP_DURATION_LONG_US = 210,
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};
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/* Size of external transmit buffer (used in tpm_transmit)*/
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#define TPM_BUFSIZE 4096
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/* Index of Count field in TPM response buffer */
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#define TPM_RSP_SIZE_BYTE 2
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#define TPM_RSP_RC_BYTE 6
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struct tpm_chip {
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int is_open;
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int locality;
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u32 vend_dev;
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unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */
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ulong chip_type;
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};
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struct tpm_input_header {
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__be16 tag;
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__be32 length;
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__be32 ordinal;
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} __packed;
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struct tpm_output_header {
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__be16 tag;
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__be32 length;
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__be32 return_code;
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} __packed;
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struct timeout_t {
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__be32 a;
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__be32 b;
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__be32 c;
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__be32 d;
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} __packed;
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struct duration_t {
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__be32 tpm_short;
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__be32 tpm_medium;
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__be32 tpm_long;
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} __packed;
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union cap_t {
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struct timeout_t timeout;
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struct duration_t duration;
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};
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struct tpm_getcap_params_in {
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__be32 cap;
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__be32 subcap_size;
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__be32 subcap;
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} __packed;
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struct tpm_getcap_params_out {
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__be32 cap_size;
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union cap_t cap;
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} __packed;
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union tpm_cmd_header {
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struct tpm_input_header in;
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struct tpm_output_header out;
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};
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union tpm_cmd_params {
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struct tpm_getcap_params_out getcap_out;
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struct tpm_getcap_params_in getcap_in;
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};
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struct tpm_cmd_t {
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union tpm_cmd_header header;
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union tpm_cmd_params params;
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} __packed;
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/* Max number of iterations after i2c NAK */
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#define MAX_COUNT 3
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/*
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* Max number of iterations after i2c NAK for 'long' commands
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*
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* We need this especially for sending TPM_READY, since the cleanup after the
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* transtion to the ready state may take some time, but it is unpredictable
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* how long it will take.
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*/
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#define MAX_COUNT_LONG 50
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enum tis_access {
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TPM_ACCESS_VALID = 0x80,
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TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
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TPM_ACCESS_REQUEST_PENDING = 0x04,
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TPM_ACCESS_REQUEST_USE = 0x02,
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};
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enum tis_status {
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TPM_STS_VALID = 0x80,
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TPM_STS_COMMAND_READY = 0x40,
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TPM_STS_GO = 0x20,
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TPM_STS_DATA_AVAIL = 0x10,
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TPM_STS_DATA_EXPECT = 0x08,
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};
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#endif
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