Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Infineon Technologies |
| 3 | * |
| 4 | * Authors: |
| 5 | * Peter Huewe <huewe.external@infineon.com> |
| 6 | * |
| 7 | * Version: 2.1.1 |
| 8 | * |
| 9 | * Description: |
| 10 | * Device driver for TCG/TCPA TPM (trusted platform module). |
| 11 | * Specifications at www.trustedcomputinggroup.org |
| 12 | * |
| 13 | * It is based on the Linux kernel driver tpm.c from Leendert van |
| 14 | * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall. |
| 15 | * |
Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 16 | * This program is free software; you can redistribute it and/or |
| 17 | * modify it under the terms of the GNU General Public License as |
| 18 | * published by the Free Software Foundation, version 2 of the |
| 19 | * License. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | * GNU General Public License for more details. |
Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 25 | */ |
| 26 | |
| 27 | #ifndef __DRIVERS_TPM_SLB9635_I2C_TPM_H__ |
| 28 | #define __DRIVERS_TPM_SLB9635_I2C_TPM_H__ |
| 29 | |
| 30 | #include <stdint.h> |
| 31 | |
| 32 | enum tpm_timeout { |
| 33 | TPM_TIMEOUT = 1, /* msecs */ |
| 34 | }; |
| 35 | |
Julius Werner | e6cf3c6 | 2014-12-19 14:38:51 -0800 | [diff] [blame] | 36 | /* Size of external transmit buffer (used for stack buffer in tpm_sendrecv) */ |
| 37 | #define TPM_BUFSIZE 1260 |
Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 38 | |
| 39 | /* Index of fields in TPM command buffer */ |
| 40 | #define TPM_CMD_SIZE_BYTE 2 |
| 41 | #define TPM_CMD_ORDINAL_BYTE 6 |
| 42 | |
| 43 | /* Index of Count field in TPM response buffer */ |
| 44 | #define TPM_RSP_SIZE_BYTE 2 |
| 45 | #define TPM_RSP_RC_BYTE 6 |
| 46 | |
| 47 | struct tpm_chip; |
| 48 | |
| 49 | struct tpm_vendor_specific { |
| 50 | const uint8_t req_complete_mask; |
| 51 | const uint8_t req_complete_val; |
| 52 | const uint8_t req_canceled; |
| 53 | int irq; |
| 54 | int (*recv)(struct tpm_chip *, uint8_t *, size_t); |
| 55 | int (*send)(struct tpm_chip *, uint8_t *, size_t); |
| 56 | void (*cancel)(struct tpm_chip *); |
| 57 | uint8_t(*status)(struct tpm_chip *); |
| 58 | int locality; |
| 59 | }; |
| 60 | |
| 61 | struct tpm_chip { |
| 62 | int is_open; |
| 63 | struct tpm_vendor_specific vendor; |
| 64 | }; |
| 65 | |
| 66 | struct tpm_input_header { |
| 67 | uint16_t tag; |
| 68 | uint32_t length; |
| 69 | uint32_t ordinal; |
| 70 | } __attribute__ ((packed)); |
| 71 | |
| 72 | struct tpm_output_header { |
| 73 | uint16_t tag; |
| 74 | uint32_t length; |
| 75 | uint32_t return_code; |
| 76 | } __attribute__ ((packed)); |
| 77 | |
| 78 | struct timeout_t { |
| 79 | uint32_t a; |
| 80 | uint32_t b; |
| 81 | uint32_t c; |
| 82 | uint32_t d; |
| 83 | } __attribute__ ((packed)); |
| 84 | |
| 85 | struct duration_t { |
| 86 | uint32_t tpm_short; |
| 87 | uint32_t tpm_medium; |
| 88 | uint32_t tpm_long; |
| 89 | } __attribute__ ((packed)); |
| 90 | |
| 91 | typedef union { |
| 92 | struct timeout_t timeout; |
| 93 | struct duration_t duration; |
| 94 | } cap_t; |
| 95 | |
| 96 | struct tpm_getcap_params_in { |
| 97 | uint32_t cap; |
| 98 | uint32_t subcap_size; |
| 99 | uint32_t subcap; |
| 100 | } __attribute__ ((packed)); |
| 101 | |
| 102 | struct tpm_getcap_params_out { |
| 103 | uint32_t cap_size; |
| 104 | cap_t cap; |
| 105 | } __attribute__ ((packed)); |
| 106 | |
| 107 | typedef union { |
| 108 | struct tpm_input_header in; |
| 109 | struct tpm_output_header out; |
| 110 | } tpm_cmd_header; |
| 111 | |
| 112 | typedef union { |
| 113 | struct tpm_getcap_params_out getcap_out; |
| 114 | struct tpm_getcap_params_in getcap_in; |
| 115 | } tpm_cmd_params; |
| 116 | |
| 117 | struct tpm_cmd_t { |
| 118 | tpm_cmd_header header; |
| 119 | tpm_cmd_params params; |
| 120 | } __attribute__ ((packed)); |
| 121 | |
Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 122 | /* ---------- Interface for TPM vendor ------------ */ |
| 123 | |
Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 124 | int tpm_vendor_init(unsigned bus, uint32_t dev_addr); |
| 125 | |
| 126 | void tpm_vendor_cleanup(struct tpm_chip *chip); |
| 127 | |
Stefan Reinauer | 7cb01e0 | 2013-08-29 16:05:02 -0700 | [diff] [blame] | 128 | #endif /* __DRIVERS_TPM_SLB9635_I2C_TPM_H__ */ |