projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 576fb1ed VB |
1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. | |
| 3 | * | |
| 4 | * See file CREDITS for list of people who contributed to this | |
| 5 | * project. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU General Public License as | |
| 9 | * published by the Free Software Foundation; either version 2 of | |
| 10 | * the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 20 | * MA 02111-1307 USA | |
| 21 | */ | |
| 22 | ||
| 23 | #include <common.h> | |
| 24 | #include <command.h> | |
| 25 | #include <tpm.h> | |
| 26 | ||
| 27 | #define MAX_TRANSACTION_SIZE 30 | |
| 28 | ||
| 29 | /* | |
| 30 | * tpm_write() expects a variable number of parameters: the internal address | |
| 31 | * followed by data to write, byte by byte. | |
| 32 | * | |
| 33 | * Returns 0 on success or -1 on errors (wrong arguments or TPM failure). | |
| 34 | */ | |
| 35 | static int tpm_process(int argc, char * const argv[], cmd_tbl_t *cmdtp) | |
| 36 | { | |
| 37 | u8 tpm_buffer[MAX_TRANSACTION_SIZE]; | |
| 38 | u32 write_size, read_size; | |
| 39 | char *p; | |
| 40 | int rv = -1; | |
| 41 | ||
| 42 | for (write_size = 0; write_size < argc; write_size++) { | |
| 43 | u32 datum = simple_strtoul(argv[write_size], &p, 0); | |
| 44 | if (*p || (datum > 0xff)) { | |
| 45 | printf("\n%s: bad data value\n\n", argv[write_size]); | |
| 46 | cmd_usage(cmdtp); | |
| 47 | return rv; | |
| 48 | } | |
| 49 | tpm_buffer[write_size] = (u8)datum; | |
| 50 | } | |
| 51 | ||
| 52 | read_size = sizeof(tpm_buffer); | |
| 53 | if (!tis_sendrecv(tpm_buffer, write_size, tpm_buffer, &read_size)) { | |
| 54 | int i; | |
| 55 | puts("Got TPM response:\n"); | |
| 56 | for (i = 0; i < read_size; i++) | |
| 57 | printf(" %2.2x", tpm_buffer[i]); | |
| 58 | puts("\n"); | |
| 59 | rv = 0; | |
| 60 | } else { | |
| 61 | puts("tpm command failed\n"); | |
| 62 | } | |
| 63 | return rv; | |
| 64 | } | |
| 65 | ||
| 66 | static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
| 67 | { | |
| 68 | int rv = 0; | |
| 69 | ||
| 70 | /* | |
| 71 | * Verify that in case it is present, the first argument, it is | |
| 72 | * exactly one character in size. | |
| 73 | */ | |
| 74 | if (argc < 7) { | |
| 75 | puts("command should be at least six bytes in size\n"); | |
| 76 | return -1; | |
| 77 | } | |
| 78 | ||
| 79 | if (tis_init()) { | |
| 80 | puts("tis_init() failed!\n"); | |
| 81 | return -1; | |
| 82 | } | |
| 83 | ||
| 84 | if (tis_open()) { | |
| 85 | puts("tis_open() failed!\n"); | |
| 86 | return -1; | |
| 87 | } | |
| 88 | ||
| 89 | rv = tpm_process(argc - 1, argv + 1, cmdtp); | |
| 90 | ||
| 91 | if (tis_close()) { | |
| 92 | puts("tis_close() failed!\n"); | |
| 93 | rv = -1; | |
| 94 | } | |
| 95 | ||
| 96 | return rv; | |
| 97 | } | |
| 98 | ||
| 99 | U_BOOT_CMD(tpm, MAX_TRANSACTION_SIZE, 1, do_tpm, | |
| 100 | "<byte> [<byte> ...] - write data and read response", | |
| 101 | "send arbitrary data (at least 6 bytes) to the TPM " | |
| 102 | "device and read the response" | |
| 103 | ); |