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| 1 /* |
| 2 * Copyright (C) 2011 Infineon Technologies |
| 3 * |
| 4 * Authors: |
| 5 * Peter Huewe <huewe.external@infineon.com> |
| 6 * |
| 7 * description: Infineon_TPM-I2C - TDDL supporting FW 2010. |
| 8 * |
| 9 * See file CREDITS for list of people who contributed to this |
| 10 * project. |
| 11 * |
| 12 * Version: 2.1.1 |
| 13 * |
| 14 * This program is free software; you can redistribute it and/or |
| 15 * modify it under the terms of the GNU General Public License as |
| 16 * published by the Free Software Foundation; either version 2 of |
| 17 * the License, or (at your option) any later version. |
| 18 * |
| 19 * This program is distributed in the hope that it will be useful, |
| 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 * GNU General Public License for more details. |
| 23 * |
| 24 * You should have received a copy of the GNU General Public License |
| 25 * along with this program; if not, write to the Free Software |
| 26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 27 * MA 02111-1307 USA |
| 28 */ |
| 29 #include <exports.h> |
| 30 |
| 31 #include "tddl.h" |
| 32 #include "tpm.h" |
| 33 |
| 34 /* buffer supporting tpm_transmit */ |
| 35 uint8_t tmpbuf[TPM_BUFSIZE]; |
| 36 |
| 37 /* Open connection to TPM */ |
| 38 TDDL_RESULT TDDL_Open(uint32_t dev_addr) |
| 39 { |
| 40 int rc; |
| 41 dbg_printf("INFO: initialising TPM\n"); |
| 42 rc = tpm_open(dev_addr); |
| 43 if (rc < 0) { |
| 44 switch (rc) { |
| 45 case -EBUSY: return TDDL_E_ALREADY_OPENED; |
| 46 case -ENODEV: return TDDL_E_COMPONENT_NOT_FOUND; |
| 47 }; |
| 48 return TDDL_E_FAIL; |
| 49 } |
| 50 return TDDL_SUCCESS; |
| 51 } |
| 52 |
| 53 /* Disconnect from the TPM */ |
| 54 TDDL_RESULT TDDL_Close(void) |
| 55 { |
| 56 tpm_close(); |
| 57 return TDDL_SUCCESS; |
| 58 } |
| 59 |
| 60 /* Send the TPM Application Protocol Data Unit (APDU) to the TPM and |
| 61 * return the response APDU */ |
| 62 TDDL_RESULT TDDL_TransmitData(uint8_t *pbTransmitBuf, uint32_t dwTransmitBufLen, |
| 63 uint8_t *pbReceiveBuf, uint32_t *pdwReceiveBufLen) |
| 64 { |
| 65 int len; |
| 66 uint32_t i; |
| 67 TDDL_RESULT rc = TDDL_E_FAIL; |
| 68 |
| 69 dbg_printf("--> xTDDL_TransmitData()\n"); |
| 70 |
| 71 dbg_printf("pbTransmitBuf = "); |
| 72 for (i = 0; i < dwTransmitBufLen; i++) |
| 73 dbg_printf("%02x ", pbTransmitBuf[i]); |
| 74 dbg_printf("\n"); |
| 75 |
| 76 /* copy buffer to make sure transmit data may be overwritten */ |
| 77 memcpy(tmpbuf, pbTransmitBuf, dwTransmitBufLen); |
| 78 |
| 79 /* do transmission */ |
| 80 len = tpm_transmit(tmpbuf, dwTransmitBufLen); |
| 81 |
| 82 if (len >= 10) { |
| 83 memcpy(pbReceiveBuf, tmpbuf, len); |
| 84 dbg_printf("INFO: copied %d bytes into pbReceiveBuf\n", len); |
| 85 *pdwReceiveBufLen = len; |
| 86 rc = TDDL_SUCCESS; |
| 87 } else { |
| 88 dbg_printf("ERROR: tpm_transmit() returned %d\n", len); |
| 89 *pdwReceiveBufLen = 0; |
| 90 } |
| 91 |
| 92 dbg_printf("pbReceiveBuf = "); |
| 93 for (i = 0; i < (*pdwReceiveBufLen); i++) |
| 94 dbg_printf("%02x ", pbReceiveBuf[i]); |
| 95 dbg_printf("\n"); |
| 96 |
| 97 dbg_printf("<-- xTDDL_TransmitData()\n"); |
| 98 |
| 99 return rc; |
| 100 } |
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