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b9944a77 DE |
1 | /* |
2 | * (C) Copyright 2013 | |
3 | * Reinhard Pfau, Guntermann & Drunck GmbH, reinhard.pfau@gdsys.cc | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; either version 2 of the License, or (at your option) | |
8 | * any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
18 | * MA 02110-1301, USA. | |
19 | */ | |
20 | ||
21 | /* TODO: some more #ifdef's to avoid unneeded code for stage 1 / stage 2 */ | |
22 | ||
23 | #ifdef CCDM_ID_DEBUG | |
24 | #define DEBUG | |
25 | #endif | |
26 | ||
27 | #include <common.h> | |
28 | #include <malloc.h> | |
29 | #include <fs.h> | |
30 | #include <i2c.h> | |
31 | #include <mmc.h> | |
32 | #include <tpm.h> | |
2b9912e6 | 33 | #include <u-boot/sha1.h> |
b9944a77 DE |
34 | #include <asm/byteorder.h> |
35 | #include <asm/unaligned.h> | |
36 | #include <pca9698.h> | |
37 | ||
38 | #undef CCDM_FIRST_STAGE | |
39 | #undef CCDM_SECOND_STAGE | |
40 | #undef CCDM_AUTO_FIRST_STAGE | |
41 | ||
42 | #ifdef CONFIG_DEVELOP | |
43 | #define CCDM_DEVELOP | |
44 | #endif | |
45 | ||
46 | #ifdef CONFIG_TRAILBLAZER | |
47 | #define CCDM_FIRST_STAGE | |
48 | #undef CCDM_SECOND_STAGE | |
49 | #else | |
50 | #undef CCDM_FIRST_STAGE | |
51 | #define CCDM_SECOND_STAGE | |
52 | #endif | |
53 | ||
54 | #if defined(CCDM_DEVELOP) && defined(CCDM_SECOND_STAGE) && \ | |
55 | !defined(CCCM_FIRST_STAGE) | |
56 | #define CCDM_AUTO_FIRST_STAGE | |
57 | #endif | |
58 | ||
59 | /* enums from TCG specs */ | |
60 | enum { | |
61 | /* capability areas */ | |
62 | TPM_CAP_NV_INDEX = 0x00000011, | |
63 | TPM_CAP_HANDLE = 0x00000014, | |
64 | /* resource types */ | |
65 | TPM_RT_KEY = 0x00000001, | |
66 | }; | |
67 | ||
68 | /* CCDM specific contants */ | |
69 | enum { | |
70 | /* NV indices */ | |
71 | NV_COMMON_DATA_INDEX = 0x40000001, | |
72 | /* magics for key blob chains */ | |
73 | MAGIC_KEY_PROGRAM = 0x68726500, | |
74 | MAGIC_HMAC = 0x68616300, | |
75 | MAGIC_END_OF_CHAIN = 0x00000000, | |
76 | /* sizes */ | |
77 | NV_COMMON_DATA_MIN_SIZE = 3 * sizeof(uint64_t) + 2 * sizeof(uint16_t), | |
78 | }; | |
79 | ||
80 | /* other constants */ | |
81 | enum { | |
82 | ESDHC_BOOT_IMAGE_SIG_OFS = 0x40, | |
83 | ESDHC_BOOT_IMAGE_SIZE_OFS = 0x48, | |
84 | ESDHC_BOOT_IMAGE_ADDR_OFS = 0x50, | |
85 | ESDHC_BOOT_IMAGE_TARGET_OFS = 0x58, | |
86 | ESDHC_BOOT_IMAGE_ENTRY_OFS = 0x60, | |
87 | }; | |
88 | ||
35ecf752 DE |
89 | enum { |
90 | I2C_SOC_0 = 0, | |
91 | I2C_SOC_1 = 1, | |
92 | }; | |
93 | ||
b9944a77 DE |
94 | struct key_program { |
95 | uint32_t magic; | |
96 | uint32_t code_crc; | |
97 | uint32_t code_size; | |
98 | uint8_t code[]; | |
99 | }; | |
100 | ||
101 | struct h_reg { | |
102 | bool valid; | |
103 | uint8_t digest[20]; | |
104 | }; | |
105 | ||
106 | ||
107 | enum access_mode { | |
108 | HREG_NONE = 0, | |
109 | HREG_RD = 1, | |
110 | HREG_WR = 2, | |
111 | HREG_RDWR = 3, | |
112 | }; | |
113 | ||
114 | /* register constants */ | |
115 | enum { | |
116 | FIX_HREG_DEVICE_ID_HASH = 0, | |
117 | FIX_HREG_SELF_HASH = 1, | |
118 | FIX_HREG_STAGE2_HASH = 2, | |
119 | FIX_HREG_VENDOR = 3, | |
120 | COUNT_FIX_HREGS | |
121 | }; | |
122 | ||
123 | ||
124 | /* hre opcodes */ | |
125 | enum { | |
126 | /* opcodes w/o data */ | |
127 | HRE_NOP = 0x00, | |
128 | HRE_SYNC = HRE_NOP, | |
129 | HRE_CHECK0 = 0x01, | |
130 | /* opcodes w/o data, w/ sync dst */ | |
131 | /* opcodes w/ data */ | |
132 | HRE_LOAD = 0x81, | |
133 | /* opcodes w/data, w/sync dst */ | |
134 | HRE_XOR = 0xC1, | |
135 | HRE_AND = 0xC2, | |
136 | HRE_OR = 0xC3, | |
137 | HRE_EXTEND = 0xC4, | |
138 | HRE_LOADKEY = 0xC5, | |
139 | }; | |
140 | ||
141 | /* hre errors */ | |
142 | enum { | |
143 | HRE_E_OK = 0, | |
144 | HRE_E_TPM_FAILURE, | |
145 | HRE_E_INVALID_HREG, | |
146 | }; | |
147 | ||
148 | static uint64_t device_id; | |
149 | static uint64_t device_cl; | |
150 | static uint64_t device_type; | |
151 | ||
152 | static uint32_t platform_key_handle; | |
153 | ||
154 | static void(*bl2_entry)(void); | |
155 | ||
156 | static struct h_reg pcr_hregs[24]; | |
157 | static struct h_reg fix_hregs[COUNT_FIX_HREGS]; | |
158 | static struct h_reg var_hregs[8]; | |
159 | static uint32_t hre_tpm_err; | |
160 | static int hre_err = HRE_E_OK; | |
161 | ||
162 | #define IS_PCR_HREG(spec) ((spec) & 0x20) | |
163 | #define IS_FIX_HREG(spec) (((spec) & 0x38) == 0x08) | |
164 | #define IS_VAR_HREG(spec) (((spec) & 0x38) == 0x10) | |
165 | #define HREG_IDX(spec) ((spec) & (IS_PCR_HREG(spec) ? 0x1f : 0x7)) | |
166 | ||
167 | ||
168 | static const uint8_t prg_stage1_prepare[] = { | |
169 | 0x00, 0x20, 0x00, 0x00, /* opcode: SYNC f0 */ | |
170 | 0x00, 0x24, 0x00, 0x00, /* opcode: SYNC f1 */ | |
171 | 0x01, 0x80, 0x00, 0x00, /* opcode: CHECK0 PCR0 */ | |
172 | 0x81, 0x22, 0x00, 0x00, /* opcode: LOAD PCR0, f0 */ | |
173 | 0x01, 0x84, 0x00, 0x00, /* opcode: CHECK0 PCR1 */ | |
174 | 0x81, 0x26, 0x10, 0x00, /* opcode: LOAD PCR1, f1 */ | |
175 | 0x01, 0x88, 0x00, 0x00, /* opcode: CHECK0 PCR2 */ | |
176 | 0x81, 0x2a, 0x20, 0x00, /* opcode: LOAD PCR2, f2 */ | |
177 | 0x01, 0x8c, 0x00, 0x00, /* opcode: CHECK0 PCR3 */ | |
178 | 0x81, 0x2e, 0x30, 0x00, /* opcode: LOAD PCR3, f3 */ | |
179 | }; | |
180 | ||
181 | static const uint8_t prg_stage2_prepare[] = { | |
182 | 0x00, 0x80, 0x00, 0x00, /* opcode: SYNC PCR0 */ | |
183 | 0x00, 0x84, 0x00, 0x00, /* opcode: SYNC PCR1 */ | |
184 | 0x00, 0x88, 0x00, 0x00, /* opcode: SYNC PCR2 */ | |
185 | 0x00, 0x8c, 0x00, 0x00, /* opcode: SYNC PCR3 */ | |
186 | 0x00, 0x90, 0x00, 0x00, /* opcode: SYNC PCR4 */ | |
187 | }; | |
188 | ||
189 | static const uint8_t prg_stage2_success[] = { | |
190 | 0x81, 0x02, 0x40, 0x14, /* opcode: LOAD PCR4, #<20B data> */ | |
191 | 0x48, 0xfd, 0x95, 0x17, 0xe7, 0x54, 0x6b, 0x68, /* data */ | |
192 | 0x92, 0x31, 0x18, 0x05, 0xf8, 0x58, 0x58, 0x3c, /* data */ | |
193 | 0xe4, 0xd2, 0x81, 0xe0, /* data */ | |
194 | }; | |
195 | ||
196 | static const uint8_t prg_stage_fail[] = { | |
197 | 0x81, 0x01, 0x00, 0x14, /* opcode: LOAD v0, #<20B data> */ | |
198 | 0xc0, 0x32, 0xad, 0xc1, 0xff, 0x62, 0x9c, 0x9b, /* data */ | |
199 | 0x66, 0xf2, 0x27, 0x49, 0xad, 0x66, 0x7e, 0x6b, /* data */ | |
200 | 0xea, 0xdf, 0x14, 0x4b, /* data */ | |
201 | 0x81, 0x42, 0x30, 0x00, /* opcode: LOAD PCR3, v0 */ | |
202 | 0x81, 0x42, 0x40, 0x00, /* opcode: LOAD PCR4, v0 */ | |
203 | }; | |
204 | ||
205 | static const uint8_t vendor[] = "Guntermann & Drunck"; | |
206 | ||
207 | ||
208 | /** | |
209 | * @brief read a bunch of data from MMC into memory. | |
210 | * | |
211 | * @param mmc pointer to the mmc structure to use. | |
212 | * @param src offset where the data starts on MMC/SD device (in bytes). | |
213 | * @param dst pointer to the location where the read data should be stored. | |
214 | * @param size number of bytes to read from the MMC/SD device. | |
215 | * @return number of bytes read or -1 on error. | |
216 | */ | |
217 | static int ccdm_mmc_read(struct mmc *mmc, u64 src, u8 *dst, int size) | |
218 | { | |
219 | int result = 0; | |
220 | u32 blk_len, ofs; | |
221 | ulong block_no, n, cnt; | |
222 | u8 *tmp_buf = NULL; | |
223 | ||
224 | if (size <= 0) | |
225 | goto end; | |
226 | ||
227 | blk_len = mmc->read_bl_len; | |
228 | tmp_buf = malloc(blk_len); | |
229 | if (!tmp_buf) | |
230 | goto failure; | |
231 | block_no = src / blk_len; | |
232 | ofs = src % blk_len; | |
233 | ||
234 | if (ofs) { | |
235 | n = mmc->block_dev.block_read(mmc->block_dev.dev, block_no++, 1, | |
236 | tmp_buf); | |
237 | if (!n) | |
238 | goto failure; | |
b4141195 | 239 | result = min(size, (int)(blk_len - ofs)); |
b9944a77 DE |
240 | memcpy(dst, tmp_buf + ofs, result); |
241 | dst += result; | |
242 | size -= result; | |
243 | } | |
244 | cnt = size / blk_len; | |
245 | if (cnt) { | |
246 | n = mmc->block_dev.block_read(mmc->block_dev.dev, block_no, cnt, | |
247 | dst); | |
248 | if (n != cnt) | |
249 | goto failure; | |
250 | size -= cnt * blk_len; | |
251 | result += cnt * blk_len; | |
252 | dst += cnt * blk_len; | |
253 | block_no += cnt; | |
254 | } | |
255 | if (size) { | |
256 | n = mmc->block_dev.block_read(mmc->block_dev.dev, block_no++, 1, | |
257 | tmp_buf); | |
258 | if (!n) | |
259 | goto failure; | |
260 | memcpy(dst, tmp_buf, size); | |
261 | result += size; | |
262 | } | |
263 | goto end; | |
264 | failure: | |
265 | result = -1; | |
266 | end: | |
267 | if (tmp_buf) | |
268 | free(tmp_buf); | |
269 | return result; | |
270 | } | |
271 | ||
272 | /** | |
273 | * @brief returns a location where the 2nd stage bootloader can be(/ is) placed. | |
274 | * | |
275 | * @return pointer to the location for/of the 2nd stage bootloader | |
276 | */ | |
277 | static u8 *get_2nd_stage_bl_location(ulong target_addr) | |
278 | { | |
279 | ulong addr; | |
280 | #ifdef CCDM_SECOND_STAGE | |
281 | addr = getenv_ulong("loadaddr", 16, CONFIG_LOADADDR); | |
282 | #else | |
283 | addr = target_addr; | |
284 | #endif | |
285 | return (u8 *)(addr); | |
286 | } | |
287 | ||
288 | ||
289 | #ifdef CCDM_SECOND_STAGE | |
290 | /** | |
291 | * @brief returns a location where the image can be(/ is) placed. | |
292 | * | |
293 | * @return pointer to the location for/of the image | |
294 | */ | |
295 | static u8 *get_image_location(void) | |
296 | { | |
297 | ulong addr; | |
298 | /* TODO use other area? */ | |
299 | addr = getenv_ulong("loadaddr", 16, CONFIG_LOADADDR); | |
300 | return (u8 *)(addr); | |
301 | } | |
302 | #endif | |
303 | ||
304 | /** | |
305 | * @brief get the size of a given (TPM) NV area | |
306 | * @param index NV index of the area to get size for | |
307 | * @param size pointer to the size | |
308 | * @return 0 on success, != 0 on error | |
309 | */ | |
310 | static int get_tpm_nv_size(uint32_t index, uint32_t *size) | |
311 | { | |
312 | uint32_t err; | |
313 | uint8_t info[72]; | |
314 | uint8_t *ptr; | |
315 | uint16_t v16; | |
316 | ||
317 | err = tpm_get_capability(TPM_CAP_NV_INDEX, index, | |
318 | info, sizeof(info)); | |
319 | if (err) { | |
320 | printf("tpm_get_capability(CAP_NV_INDEX, %08x) failed: %u\n", | |
321 | index, err); | |
322 | return 1; | |
323 | } | |
324 | ||
325 | /* skip tag and nvIndex */ | |
326 | ptr = info + 6; | |
327 | /* skip 2 pcr info fields */ | |
328 | v16 = get_unaligned_be16(ptr); | |
329 | ptr += 2 + v16 + 1 + 20; | |
330 | v16 = get_unaligned_be16(ptr); | |
331 | ptr += 2 + v16 + 1 + 20; | |
332 | /* skip permission and flags */ | |
333 | ptr += 6 + 3; | |
334 | ||
335 | *size = get_unaligned_be32(ptr); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | /** | |
340 | * @brief search for a key by usage auth and pub key hash. | |
341 | * @param auth usage auth of the key to search for | |
342 | * @param pubkey_digest (SHA1) hash of the pub key structure of the key | |
343 | * @param[out] handle the handle of the key iff found | |
344 | * @return 0 if key was found in TPM; != 0 if not. | |
345 | */ | |
346 | static int find_key(const uint8_t auth[20], const uint8_t pubkey_digest[20], | |
347 | uint32_t *handle) | |
348 | { | |
349 | uint16_t key_count; | |
350 | uint32_t key_handles[10]; | |
351 | uint8_t buf[288]; | |
352 | uint8_t *ptr; | |
353 | uint32_t err; | |
354 | uint8_t digest[20]; | |
355 | size_t buf_len; | |
356 | unsigned int i; | |
357 | ||
358 | /* fetch list of already loaded keys in the TPM */ | |
359 | err = tpm_get_capability(TPM_CAP_HANDLE, TPM_RT_KEY, buf, sizeof(buf)); | |
360 | if (err) | |
361 | return -1; | |
362 | key_count = get_unaligned_be16(buf); | |
363 | ptr = buf + 2; | |
364 | for (i = 0; i < key_count; ++i, ptr += 4) | |
365 | key_handles[i] = get_unaligned_be32(ptr); | |
366 | ||
367 | /* now search a(/ the) key which we can access with the given auth */ | |
368 | for (i = 0; i < key_count; ++i) { | |
369 | buf_len = sizeof(buf); | |
370 | err = tpm_get_pub_key_oiap(key_handles[i], auth, buf, &buf_len); | |
371 | if (err && err != TPM_AUTHFAIL) | |
372 | return -1; | |
373 | if (err) | |
374 | continue; | |
375 | sha1_csum(buf, buf_len, digest); | |
376 | if (!memcmp(digest, pubkey_digest, 20)) { | |
377 | *handle = key_handles[i]; | |
378 | return 0; | |
379 | } | |
380 | } | |
381 | return 1; | |
382 | } | |
383 | ||
384 | /** | |
385 | * @brief read CCDM common data from TPM NV | |
386 | * @return 0 if CCDM common data was found and read, !=0 if something failed. | |
387 | */ | |
388 | static int read_common_data(void) | |
389 | { | |
390 | uint32_t size; | |
391 | uint32_t err; | |
392 | uint8_t buf[256]; | |
393 | sha1_context ctx; | |
394 | ||
395 | if (get_tpm_nv_size(NV_COMMON_DATA_INDEX, &size) || | |
396 | size < NV_COMMON_DATA_MIN_SIZE) | |
397 | return 1; | |
398 | err = tpm_nv_read_value(NV_COMMON_DATA_INDEX, | |
399 | buf, min(sizeof(buf), size)); | |
400 | if (err) { | |
401 | printf("tpm_nv_read_value() failed: %u\n", err); | |
402 | return 1; | |
403 | } | |
404 | ||
405 | device_id = get_unaligned_be64(buf); | |
406 | device_cl = get_unaligned_be64(buf + 8); | |
407 | device_type = get_unaligned_be64(buf + 16); | |
408 | ||
409 | sha1_starts(&ctx); | |
410 | sha1_update(&ctx, buf, 24); | |
411 | sha1_finish(&ctx, fix_hregs[FIX_HREG_DEVICE_ID_HASH].digest); | |
412 | fix_hregs[FIX_HREG_DEVICE_ID_HASH].valid = true; | |
413 | ||
414 | platform_key_handle = get_unaligned_be32(buf + 24); | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | /** | |
420 | * @brief compute hash of bootloader itself. | |
421 | * @param[out] dst hash register where the hash should be stored | |
422 | * @return 0 on success, != 0 on failure. | |
423 | * | |
424 | * @note MUST be called at a time where the boot loader is accessible at the | |
425 | * configured location (; so take care when code is reallocated). | |
426 | */ | |
427 | static int compute_self_hash(struct h_reg *dst) | |
428 | { | |
429 | sha1_csum((const uint8_t *)CONFIG_SYS_MONITOR_BASE, | |
430 | CONFIG_SYS_MONITOR_LEN, dst->digest); | |
431 | dst->valid = true; | |
432 | return 0; | |
433 | } | |
434 | ||
435 | int ccdm_compute_self_hash(void) | |
436 | { | |
437 | if (!fix_hregs[FIX_HREG_SELF_HASH].valid) | |
438 | compute_self_hash(&fix_hregs[FIX_HREG_SELF_HASH]); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | /** | |
443 | * @brief compute the hash of the 2nd stage boot loader (on SD card) | |
444 | * @param[out] dst hash register to store the computed hash | |
445 | * @return 0 on success, != 0 on failure | |
446 | * | |
447 | * Determines the size and location of the 2nd stage boot loader on SD card, | |
448 | * loads the 2nd stage boot loader and computes the (SHA1) hash value. | |
449 | * Within the 1st stage boot loader, the 2nd stage boot loader is loaded at | |
450 | * the desired memory location and the variable @a bl2_entry is set. | |
451 | * | |
452 | * @note This sets the variable @a bl2_entry to the entry point when the | |
453 | * 2nd stage boot loader is loaded at its configured memory location. | |
454 | */ | |
455 | static int compute_second_stage_hash(struct h_reg *dst) | |
456 | { | |
457 | int result = 0; | |
458 | u32 code_len, code_offset, target_addr, exec_entry; | |
459 | struct mmc *mmc; | |
460 | u8 *load_addr = NULL; | |
461 | u8 buf[128]; | |
462 | ||
463 | mmc = find_mmc_device(0); | |
464 | if (!mmc) | |
465 | goto failure; | |
466 | mmc_init(mmc); | |
467 | ||
468 | if (ccdm_mmc_read(mmc, 0, buf, sizeof(buf)) < 0) | |
469 | goto failure; | |
470 | ||
471 | code_offset = *(u32 *)(buf + ESDHC_BOOT_IMAGE_ADDR_OFS); | |
472 | code_len = *(u32 *)(buf + ESDHC_BOOT_IMAGE_SIZE_OFS); | |
473 | target_addr = *(u32 *)(buf + ESDHC_BOOT_IMAGE_TARGET_OFS); | |
474 | exec_entry = *(u32 *)(buf + ESDHC_BOOT_IMAGE_ENTRY_OFS); | |
475 | ||
476 | load_addr = get_2nd_stage_bl_location(target_addr); | |
477 | if (load_addr == (u8 *)target_addr) | |
478 | bl2_entry = (void(*)(void))exec_entry; | |
479 | ||
480 | if (ccdm_mmc_read(mmc, code_offset, load_addr, code_len) < 0) | |
481 | goto failure; | |
482 | ||
483 | sha1_csum(load_addr, code_len, dst->digest); | |
484 | dst->valid = true; | |
485 | ||
486 | goto end; | |
487 | failure: | |
488 | result = 1; | |
489 | bl2_entry = NULL; | |
490 | end: | |
491 | return result; | |
492 | } | |
493 | ||
494 | /** | |
495 | * @brief get pointer to hash register by specification | |
496 | * @param spec specification of a hash register | |
497 | * @return pointer to hash register or NULL if @a spec does not qualify a | |
498 | * valid hash register; NULL else. | |
499 | */ | |
500 | static struct h_reg *get_hreg(uint8_t spec) | |
501 | { | |
502 | uint8_t idx; | |
503 | ||
504 | idx = HREG_IDX(spec); | |
505 | if (IS_FIX_HREG(spec)) { | |
506 | if (idx < ARRAY_SIZE(fix_hregs)) | |
507 | return fix_hregs + idx; | |
508 | hre_err = HRE_E_INVALID_HREG; | |
509 | } else if (IS_PCR_HREG(spec)) { | |
510 | if (idx < ARRAY_SIZE(pcr_hregs)) | |
511 | return pcr_hregs + idx; | |
512 | hre_err = HRE_E_INVALID_HREG; | |
513 | } else if (IS_VAR_HREG(spec)) { | |
514 | if (idx < ARRAY_SIZE(var_hregs)) | |
515 | return var_hregs + idx; | |
516 | hre_err = HRE_E_INVALID_HREG; | |
517 | } | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | /** | |
522 | * @brief get pointer of a hash register by specification and usage. | |
523 | * @param spec specification of a hash register | |
524 | * @param mode access mode (read or write or read/write) | |
525 | * @return pointer to hash register if found and valid; NULL else. | |
526 | * | |
527 | * This func uses @a get_reg() to determine the hash register for a given spec. | |
528 | * If a register is found it is validated according to the desired access mode. | |
529 | * The value of automatic registers (PCR register and fixed registers) is | |
530 | * loaded or computed on read access. | |
531 | */ | |
532 | static struct h_reg *access_hreg(uint8_t spec, enum access_mode mode) | |
533 | { | |
534 | struct h_reg *result; | |
535 | ||
536 | result = get_hreg(spec); | |
537 | if (!result) | |
538 | return NULL; | |
539 | ||
540 | if (mode & HREG_WR) { | |
541 | if (IS_FIX_HREG(spec)) { | |
542 | hre_err = HRE_E_INVALID_HREG; | |
543 | return NULL; | |
544 | } | |
545 | } | |
546 | if (mode & HREG_RD) { | |
547 | if (!result->valid) { | |
548 | if (IS_PCR_HREG(spec)) { | |
549 | hre_tpm_err = tpm_pcr_read(HREG_IDX(spec), | |
550 | result->digest, 20); | |
551 | result->valid = (hre_tpm_err == TPM_SUCCESS); | |
552 | } else if (IS_FIX_HREG(spec)) { | |
553 | switch (HREG_IDX(spec)) { | |
554 | case FIX_HREG_DEVICE_ID_HASH: | |
555 | read_common_data(); | |
556 | break; | |
557 | case FIX_HREG_SELF_HASH: | |
558 | ccdm_compute_self_hash(); | |
559 | break; | |
560 | case FIX_HREG_STAGE2_HASH: | |
561 | compute_second_stage_hash(result); | |
562 | break; | |
563 | case FIX_HREG_VENDOR: | |
564 | memcpy(result->digest, vendor, 20); | |
565 | result->valid = true; | |
566 | break; | |
567 | } | |
568 | } else { | |
569 | result->valid = true; | |
570 | } | |
571 | } | |
572 | if (!result->valid) { | |
573 | hre_err = HRE_E_INVALID_HREG; | |
574 | return NULL; | |
575 | } | |
576 | } | |
577 | ||
578 | return result; | |
579 | } | |
580 | ||
581 | static void *compute_and(void *_dst, const void *_src, size_t n) | |
582 | { | |
583 | uint8_t *dst = _dst; | |
584 | const uint8_t *src = _src; | |
585 | size_t i; | |
586 | ||
587 | for (i = n; i-- > 0; ) | |
588 | *dst++ &= *src++; | |
589 | ||
590 | return _dst; | |
591 | } | |
592 | ||
593 | static void *compute_or(void *_dst, const void *_src, size_t n) | |
594 | { | |
595 | uint8_t *dst = _dst; | |
596 | const uint8_t *src = _src; | |
597 | size_t i; | |
598 | ||
599 | for (i = n; i-- > 0; ) | |
600 | *dst++ |= *src++; | |
601 | ||
602 | return _dst; | |
603 | } | |
604 | ||
605 | static void *compute_xor(void *_dst, const void *_src, size_t n) | |
606 | { | |
607 | uint8_t *dst = _dst; | |
608 | const uint8_t *src = _src; | |
609 | size_t i; | |
610 | ||
611 | for (i = n; i-- > 0; ) | |
612 | *dst++ ^= *src++; | |
613 | ||
614 | return _dst; | |
615 | } | |
616 | ||
617 | static void *compute_extend(void *_dst, const void *_src, size_t n) | |
618 | { | |
619 | uint8_t digest[20]; | |
620 | sha1_context ctx; | |
621 | ||
622 | sha1_starts(&ctx); | |
623 | sha1_update(&ctx, _dst, n); | |
624 | sha1_update(&ctx, _src, n); | |
625 | sha1_finish(&ctx, digest); | |
626 | memcpy(_dst, digest, min(n, sizeof(digest))); | |
627 | ||
628 | return _dst; | |
629 | } | |
630 | ||
631 | static int hre_op_loadkey(struct h_reg *src_reg, struct h_reg *dst_reg, | |
632 | const void *key, size_t key_size) | |
633 | { | |
634 | uint32_t parent_handle; | |
635 | uint32_t key_handle; | |
636 | ||
637 | if (!src_reg || !dst_reg || !src_reg->valid || !dst_reg->valid) | |
638 | return -1; | |
639 | if (find_key(src_reg->digest, dst_reg->digest, &parent_handle)) | |
640 | return -1; | |
641 | hre_tpm_err = tpm_load_key2_oiap(parent_handle, key, key_size, | |
642 | src_reg->digest, &key_handle); | |
643 | if (hre_tpm_err) { | |
644 | hre_err = HRE_E_TPM_FAILURE; | |
645 | return -1; | |
646 | } | |
647 | /* TODO remember key handle somehow? */ | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | /** | |
653 | * @brief executes the next opcode on the hash register engine. | |
654 | * @param[in,out] ip pointer to the opcode (instruction pointer) | |
655 | * @param[in,out] code_size (remaining) size of the code | |
656 | * @return new instruction pointer on success, NULL on error. | |
657 | */ | |
658 | static const uint8_t *hre_execute_op(const uint8_t **ip, size_t *code_size) | |
659 | { | |
660 | bool dst_modified = false; | |
661 | uint32_t ins; | |
662 | uint8_t opcode; | |
663 | uint8_t src_spec; | |
664 | uint8_t dst_spec; | |
665 | uint16_t data_size; | |
666 | struct h_reg *src_reg, *dst_reg; | |
667 | uint8_t buf[20]; | |
668 | const uint8_t *src_buf, *data; | |
669 | uint8_t *ptr; | |
670 | int i; | |
671 | void * (*bin_func)(void *, const void *, size_t); | |
672 | ||
673 | if (*code_size < 4) | |
674 | return NULL; | |
675 | ||
676 | ins = get_unaligned_be32(*ip); | |
677 | opcode = **ip; | |
678 | data = *ip + 4; | |
679 | src_spec = (ins >> 18) & 0x3f; | |
680 | dst_spec = (ins >> 12) & 0x3f; | |
681 | data_size = (ins & 0x7ff); | |
682 | ||
683 | debug("HRE: ins=%08x (op=%02x, s=%02x, d=%02x, L=%d)\n", ins, | |
684 | opcode, src_spec, dst_spec, data_size); | |
685 | ||
686 | if ((opcode & 0x80) && (data_size + 4) > *code_size) | |
687 | return NULL; | |
688 | ||
689 | src_reg = access_hreg(src_spec, HREG_RD); | |
690 | if (hre_err || hre_tpm_err) | |
691 | return NULL; | |
692 | dst_reg = access_hreg(dst_spec, (opcode & 0x40) ? HREG_RDWR : HREG_WR); | |
693 | if (hre_err || hre_tpm_err) | |
694 | return NULL; | |
695 | ||
696 | switch (opcode) { | |
697 | case HRE_NOP: | |
698 | goto end; | |
699 | case HRE_CHECK0: | |
700 | if (src_reg) { | |
701 | for (i = 0; i < 20; ++i) { | |
702 | if (src_reg->digest[i]) | |
703 | return NULL; | |
704 | } | |
705 | } | |
706 | break; | |
707 | case HRE_LOAD: | |
708 | bin_func = memcpy; | |
709 | goto do_bin_func; | |
710 | case HRE_XOR: | |
711 | bin_func = compute_xor; | |
712 | goto do_bin_func; | |
713 | case HRE_AND: | |
714 | bin_func = compute_and; | |
715 | goto do_bin_func; | |
716 | case HRE_OR: | |
717 | bin_func = compute_or; | |
718 | goto do_bin_func; | |
719 | case HRE_EXTEND: | |
720 | bin_func = compute_extend; | |
721 | do_bin_func: | |
722 | if (!dst_reg) | |
723 | return NULL; | |
724 | if (src_reg) { | |
725 | src_buf = src_reg->digest; | |
726 | } else { | |
727 | if (!data_size) { | |
728 | memset(buf, 0, 20); | |
729 | src_buf = buf; | |
730 | } else if (data_size == 1) { | |
731 | memset(buf, *data, 20); | |
732 | src_buf = buf; | |
733 | } else if (data_size >= 20) { | |
734 | src_buf = data; | |
735 | } else { | |
736 | src_buf = buf; | |
737 | for (ptr = (uint8_t *)src_buf, i = 20; i > 0; | |
738 | i -= data_size, ptr += data_size) | |
b4141195 MY |
739 | memcpy(ptr, data, |
740 | min_t(size_t, i, data_size)); | |
b9944a77 DE |
741 | } |
742 | } | |
743 | bin_func(dst_reg->digest, src_buf, 20); | |
744 | dst_reg->valid = true; | |
745 | dst_modified = true; | |
746 | break; | |
747 | case HRE_LOADKEY: | |
748 | if (hre_op_loadkey(src_reg, dst_reg, data, data_size)) | |
749 | return NULL; | |
750 | break; | |
751 | default: | |
752 | return NULL; | |
753 | } | |
754 | ||
755 | if (dst_reg && dst_modified && IS_PCR_HREG(dst_spec)) { | |
756 | hre_tpm_err = tpm_extend(HREG_IDX(dst_spec), dst_reg->digest, | |
757 | dst_reg->digest); | |
758 | if (hre_tpm_err) { | |
759 | hre_err = HRE_E_TPM_FAILURE; | |
760 | return NULL; | |
761 | } | |
762 | } | |
763 | end: | |
764 | *ip += 4; | |
765 | *code_size -= 4; | |
766 | if (opcode & 0x80) { | |
767 | *ip += data_size; | |
768 | *code_size -= data_size; | |
769 | } | |
770 | ||
771 | return *ip; | |
772 | } | |
773 | ||
774 | /** | |
775 | * @brief runs a program on the hash register engine. | |
776 | * @param code pointer to the (HRE) code. | |
777 | * @param code_size size of the code (in bytes). | |
778 | * @return 0 on success, != 0 on failure. | |
779 | */ | |
780 | static int hre_run_program(const uint8_t *code, size_t code_size) | |
781 | { | |
782 | size_t code_left; | |
783 | const uint8_t *ip = code; | |
784 | ||
785 | code_left = code_size; | |
786 | hre_tpm_err = 0; | |
787 | hre_err = HRE_E_OK; | |
788 | while (code_left > 0) | |
789 | if (!hre_execute_op(&ip, &code_left)) | |
790 | return -1; | |
791 | ||
792 | return hre_err; | |
793 | } | |
794 | ||
795 | static int check_hmac(struct key_program *hmac, | |
796 | const uint8_t *data, size_t data_size) | |
797 | { | |
798 | uint8_t key[20], computed_hmac[20]; | |
799 | uint32_t type; | |
800 | ||
801 | type = get_unaligned_be32(hmac->code); | |
802 | if (type != 0) | |
803 | return 1; | |
804 | memset(key, 0, sizeof(key)); | |
805 | compute_extend(key, pcr_hregs[1].digest, 20); | |
806 | compute_extend(key, pcr_hregs[2].digest, 20); | |
807 | compute_extend(key, pcr_hregs[3].digest, 20); | |
808 | compute_extend(key, pcr_hregs[4].digest, 20); | |
809 | ||
810 | sha1_hmac(key, sizeof(key), data, data_size, computed_hmac); | |
811 | ||
812 | return memcmp(computed_hmac, hmac->code + 4, 20); | |
813 | } | |
814 | ||
815 | static int verify_program(struct key_program *prg) | |
816 | { | |
817 | uint32_t crc; | |
818 | crc = crc32(0, prg->code, prg->code_size); | |
819 | ||
820 | if (crc != prg->code_crc) { | |
821 | printf("HRC crc mismatch: %08x != %08x\n", | |
822 | crc, prg->code_crc); | |
823 | return 1; | |
824 | } | |
825 | return 0; | |
826 | } | |
827 | ||
828 | #if defined(CCDM_FIRST_STAGE) || (defined CCDM_AUTO_FIRST_STAGE) | |
829 | static struct key_program *load_sd_key_program(void) | |
830 | { | |
831 | u32 code_len, code_offset; | |
832 | struct mmc *mmc; | |
833 | u8 buf[128]; | |
834 | struct key_program *result = NULL, *hmac = NULL; | |
835 | struct key_program header; | |
836 | ||
837 | mmc = find_mmc_device(0); | |
838 | if (!mmc) | |
839 | return NULL; | |
840 | mmc_init(mmc); | |
841 | ||
842 | if (ccdm_mmc_read(mmc, 0, buf, sizeof(buf)) <= 0) | |
843 | goto failure; | |
844 | ||
845 | code_offset = *(u32 *)(buf + ESDHC_BOOT_IMAGE_ADDR_OFS); | |
846 | code_len = *(u32 *)(buf + ESDHC_BOOT_IMAGE_SIZE_OFS); | |
847 | ||
848 | code_offset += code_len; | |
849 | /* TODO: the following needs to be the size of the 2nd stage env */ | |
850 | code_offset += CONFIG_ENV_SIZE; | |
851 | ||
852 | if (ccdm_mmc_read(mmc, code_offset, buf, 4*3) < 0) | |
853 | goto failure; | |
854 | ||
855 | header.magic = get_unaligned_be32(buf); | |
856 | header.code_crc = get_unaligned_be32(buf + 4); | |
857 | header.code_size = get_unaligned_be32(buf + 8); | |
858 | ||
859 | if (header.magic != MAGIC_KEY_PROGRAM) | |
860 | goto failure; | |
861 | ||
862 | result = malloc(sizeof(struct key_program) + header.code_size); | |
863 | if (!result) | |
864 | goto failure; | |
865 | *result = header; | |
866 | ||
867 | printf("load key program chunk from SD card (%u bytes) ", | |
868 | header.code_size); | |
869 | code_offset += 12; | |
870 | if (ccdm_mmc_read(mmc, code_offset, result->code, header.code_size) | |
871 | < 0) | |
872 | goto failure; | |
873 | code_offset += header.code_size; | |
874 | puts("\n"); | |
875 | ||
876 | if (verify_program(result)) | |
877 | goto failure; | |
878 | ||
879 | if (ccdm_mmc_read(mmc, code_offset, buf, 4*3) < 0) | |
880 | goto failure; | |
881 | ||
882 | header.magic = get_unaligned_be32(buf); | |
883 | header.code_crc = get_unaligned_be32(buf + 4); | |
884 | header.code_size = get_unaligned_be32(buf + 8); | |
885 | ||
886 | if (header.magic == MAGIC_HMAC) { | |
887 | puts("check integrity\n"); | |
888 | hmac = malloc(sizeof(struct key_program) + header.code_size); | |
889 | if (!hmac) | |
890 | goto failure; | |
891 | *hmac = header; | |
892 | code_offset += 12; | |
893 | if (ccdm_mmc_read(mmc, code_offset, hmac->code, | |
894 | hmac->code_size) < 0) | |
895 | goto failure; | |
896 | if (verify_program(hmac)) | |
897 | goto failure; | |
898 | if (check_hmac(hmac, result->code, result->code_size)) { | |
899 | puts("key program integrity could not be verified\n"); | |
900 | goto failure; | |
901 | } | |
902 | puts("key program verified\n"); | |
903 | } | |
904 | ||
905 | goto end; | |
906 | failure: | |
907 | if (result) | |
908 | free(result); | |
909 | result = NULL; | |
910 | end: | |
911 | if (hmac) | |
912 | free(hmac); | |
913 | ||
914 | return result; | |
915 | } | |
916 | #endif | |
917 | ||
918 | #ifdef CCDM_SECOND_STAGE | |
919 | /** | |
920 | * @brief load a key program from file system. | |
921 | * @param ifname interface of the file system | |
922 | * @param dev_part_str device part of the file system | |
923 | * @param fs_type tyep of the file system | |
924 | * @param path path of the file to load. | |
925 | * @return the loaded structure or NULL on failure. | |
926 | */ | |
927 | static struct key_program *load_key_chunk(const char *ifname, | |
928 | const char *dev_part_str, int fs_type, | |
929 | const char *path) | |
930 | { | |
931 | struct key_program *result = NULL; | |
932 | struct key_program header; | |
933 | uint32_t crc; | |
934 | uint8_t buf[12]; | |
935 | int i; | |
936 | ||
937 | if (fs_set_blk_dev(ifname, dev_part_str, fs_type)) | |
938 | goto failure; | |
939 | i = fs_read(path, (ulong)buf, 0, 12); | |
940 | if (i < 12) | |
941 | goto failure; | |
942 | header.magic = get_unaligned_be32(buf); | |
943 | header.code_crc = get_unaligned_be32(buf + 4); | |
944 | header.code_size = get_unaligned_be32(buf + 8); | |
945 | ||
946 | if (header.magic != MAGIC_HMAC && header.magic != MAGIC_KEY_PROGRAM) | |
947 | goto failure; | |
948 | ||
949 | result = malloc(sizeof(struct key_program) + header.code_size); | |
950 | if (!result) | |
951 | goto failure; | |
952 | if (fs_set_blk_dev(ifname, dev_part_str, fs_type)) | |
953 | goto failure; | |
954 | i = fs_read(path, (ulong)result, 0, | |
955 | sizeof(struct key_program) + header.code_size); | |
956 | if (i <= 0) | |
957 | goto failure; | |
958 | *result = header; | |
959 | ||
960 | crc = crc32(0, result->code, result->code_size); | |
961 | ||
962 | if (crc != result->code_crc) { | |
963 | printf("%s: HRC crc mismatch: %08x != %08x\n", | |
964 | path, crc, result->code_crc); | |
965 | goto failure; | |
966 | } | |
967 | goto end; | |
968 | failure: | |
969 | if (result) { | |
970 | free(result); | |
971 | result = NULL; | |
972 | } | |
973 | end: | |
974 | return result; | |
975 | } | |
976 | #endif | |
977 | ||
978 | #if defined(CCDM_FIRST_STAGE) || (defined CCDM_AUTO_FIRST_STAGE) | |
979 | static int first_stage_actions(void) | |
980 | { | |
981 | int result = 0; | |
982 | struct key_program *sd_prg = NULL; | |
983 | ||
984 | puts("CCDM S1: start actions\n"); | |
985 | #ifndef CCDM_SECOND_STAGE | |
986 | if (tpm_continue_self_test()) | |
987 | goto failure; | |
988 | #else | |
989 | tpm_continue_self_test(); | |
990 | #endif | |
991 | mdelay(37); | |
992 | ||
993 | if (hre_run_program(prg_stage1_prepare, sizeof(prg_stage1_prepare))) | |
994 | goto failure; | |
995 | ||
996 | sd_prg = load_sd_key_program(); | |
997 | if (sd_prg) { | |
998 | if (hre_run_program(sd_prg->code, sd_prg->code_size)) | |
999 | goto failure; | |
1000 | puts("SD code run successfully\n"); | |
1001 | } else { | |
1002 | puts("no key program found on SD\n"); | |
1003 | goto failure; | |
1004 | } | |
1005 | goto end; | |
1006 | failure: | |
1007 | result = 1; | |
1008 | end: | |
1009 | if (sd_prg) | |
1010 | free(sd_prg); | |
1011 | printf("CCDM S1: actions done (%d)\n", result); | |
1012 | return result; | |
1013 | } | |
1014 | #endif | |
1015 | ||
1016 | #ifdef CCDM_FIRST_STAGE | |
1017 | static int first_stage_init(void) | |
1018 | { | |
1019 | int res = 0; | |
1020 | puts("CCDM S1\n"); | |
1021 | if (tpm_init() || tpm_startup(TPM_ST_CLEAR)) | |
1022 | return 1; | |
1023 | res = first_stage_actions(); | |
1024 | #ifndef CCDM_SECOND_STAGE | |
1025 | if (!res) { | |
1026 | if (bl2_entry) | |
1027 | (*bl2_entry)(); | |
1028 | res = 1; | |
1029 | } | |
1030 | #endif | |
1031 | return res; | |
1032 | } | |
1033 | #endif | |
1034 | ||
1035 | #ifdef CCDM_SECOND_STAGE | |
1036 | static int second_stage_init(void) | |
1037 | { | |
1038 | static const char mac_suffix[] = ".mac"; | |
1039 | bool did_first_stage_run = true; | |
1040 | int result = 0; | |
1041 | char *cptr, *mmcdev = NULL; | |
1042 | struct key_program *hmac_blob = NULL; | |
1043 | const char *image_path = "/ccdm.itb"; | |
1044 | char *mac_path = NULL; | |
1045 | ulong image_addr; | |
1046 | size_t image_size; | |
1047 | uint32_t err; | |
1048 | ||
1049 | printf("CCDM S2\n"); | |
1050 | if (tpm_init()) | |
1051 | return 1; | |
1052 | err = tpm_startup(TPM_ST_CLEAR); | |
1053 | if (err != TPM_INVALID_POSTINIT) | |
1054 | did_first_stage_run = false; | |
1055 | ||
1056 | #ifdef CCDM_AUTO_FIRST_STAGE | |
1057 | if (!did_first_stage_run && first_stage_actions()) | |
1058 | goto failure; | |
1059 | #else | |
1060 | if (!did_first_stage_run) | |
1061 | goto failure; | |
1062 | #endif | |
1063 | ||
1064 | if (hre_run_program(prg_stage2_prepare, sizeof(prg_stage2_prepare))) | |
1065 | goto failure; | |
1066 | ||
1067 | /* run "prepboot" from env to get "mmcdev" set */ | |
1068 | cptr = getenv("prepboot"); | |
1069 | if (cptr && !run_command(cptr, 0)) | |
1070 | mmcdev = getenv("mmcdev"); | |
1071 | if (!mmcdev) | |
1072 | goto failure; | |
1073 | ||
1074 | cptr = getenv("ramdiskimage"); | |
1075 | if (cptr) | |
1076 | image_path = cptr; | |
1077 | ||
1078 | mac_path = malloc(strlen(image_path) + strlen(mac_suffix) + 1); | |
1079 | if (mac_path == NULL) | |
1080 | goto failure; | |
1081 | strcpy(mac_path, image_path); | |
1082 | strcat(mac_path, mac_suffix); | |
1083 | ||
1084 | /* read image from mmcdev (ccdm.itb) */ | |
1085 | image_addr = (ulong)get_image_location(); | |
1086 | if (fs_set_blk_dev("mmc", mmcdev, FS_TYPE_EXT)) | |
1087 | goto failure; | |
1088 | image_size = fs_read(image_path, image_addr, 0, 0); | |
1089 | if (image_size <= 0) | |
1090 | goto failure; | |
1091 | printf("CCDM image found on %s, %d bytes\n", mmcdev, image_size); | |
1092 | ||
1093 | hmac_blob = load_key_chunk("mmc", mmcdev, FS_TYPE_EXT, mac_path); | |
1094 | if (!hmac_blob) { | |
1095 | puts("failed to load mac file\n"); | |
1096 | goto failure; | |
1097 | } | |
1098 | if (verify_program(hmac_blob)) { | |
1099 | puts("corrupted mac file\n"); | |
1100 | goto failure; | |
1101 | } | |
1102 | if (check_hmac(hmac_blob, (u8 *)image_addr, image_size)) { | |
1103 | puts("image integrity could not be verified\n"); | |
1104 | goto failure; | |
1105 | } | |
1106 | puts("CCDM image OK\n"); | |
1107 | ||
1108 | hre_run_program(prg_stage2_success, sizeof(prg_stage2_success)); | |
1109 | ||
1110 | goto end; | |
1111 | failure: | |
1112 | result = 1; | |
1113 | hre_run_program(prg_stage_fail, sizeof(prg_stage_fail)); | |
1114 | end: | |
1115 | if (hmac_blob) | |
1116 | free(hmac_blob); | |
1117 | if (mac_path) | |
1118 | free(mac_path); | |
1119 | ||
1120 | return result; | |
1121 | } | |
1122 | #endif | |
1123 | ||
1124 | int show_self_hash(void) | |
1125 | { | |
1126 | struct h_reg *hash_ptr; | |
1127 | #ifdef CCDM_SECOND_STAGE | |
1128 | struct h_reg hash; | |
1129 | ||
1130 | hash_ptr = &hash; | |
1131 | if (compute_self_hash(hash_ptr)) | |
1132 | return 1; | |
1133 | #else | |
1134 | hash_ptr = &fix_hregs[FIX_HREG_SELF_HASH]; | |
1135 | #endif | |
1136 | puts("self hash: "); | |
1137 | if (hash_ptr && hash_ptr->valid) | |
1138 | print_buffer(0, hash_ptr->digest, 1, 20, 20); | |
1139 | else | |
1140 | puts("INVALID\n"); | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * @brief let the system hang. | |
1147 | * | |
1148 | * Called on error. | |
1149 | * Will stop the boot process; display a message and signal the error condition | |
1150 | * by blinking the "status" and the "finder" LED of the controller board. | |
1151 | * | |
1152 | * @note the develop version runs the blink cycle 2 times and then returns. | |
1153 | * The release version never returns. | |
1154 | */ | |
1155 | static void ccdm_hang(void) | |
1156 | { | |
1157 | static const u64 f0 = 0x0ba3bb8ba2e880; /* blink code "finder" LED */ | |
1158 | static const u64 s0 = 0x00f0f0f0f0f0f0; /* blink code "status" LED */ | |
1159 | u64 f, s; | |
1160 | int i; | |
1161 | #ifdef CCDM_DEVELOP | |
1162 | int j; | |
1163 | #endif | |
1164 | ||
35ecf752 | 1165 | I2C_SET_BUS(I2C_SOC_0); |
b9944a77 DE |
1166 | pca9698_direction_output(0x22, 0, 0); /* Finder */ |
1167 | pca9698_direction_output(0x22, 4, 0); /* Status */ | |
1168 | ||
1169 | puts("### ERROR ### Please RESET the board ###\n"); | |
1170 | bootstage_error(BOOTSTAGE_ID_NEED_RESET); | |
1171 | #ifdef CCDM_DEVELOP | |
1172 | puts("*** ERROR ******** THIS WOULD HANG ******** ERROR ***\n"); | |
1173 | puts("** but we continue since this is a DEVELOP version **\n"); | |
1174 | puts("*** ERROR ******** THIS WOULD HANG ******** ERROR ***\n"); | |
1175 | for (j = 2; j-- > 0;) { | |
1176 | putc('#'); | |
1177 | #else | |
1178 | for (;;) { | |
1179 | #endif | |
1180 | f = f0; | |
1181 | s = s0; | |
1182 | for (i = 54; i-- > 0;) { | |
1183 | pca9698_set_value(0x22, 0, !(f & 1)); | |
1184 | pca9698_set_value(0x22, 4, (s & 1)); | |
1185 | f >>= 1; | |
1186 | s >>= 1; | |
1187 | mdelay(120); | |
1188 | } | |
1189 | } | |
1190 | puts("\ncontinue...\n"); | |
1191 | } | |
1192 | ||
1193 | int startup_ccdm_id_module(void) | |
1194 | { | |
1195 | int result = 0; | |
1196 | unsigned int orig_i2c_bus; | |
1197 | ||
35ecf752 DE |
1198 | orig_i2c_bus = i2c_get_bus_num(); |
1199 | i2c_set_bus_num(I2C_SOC_1); | |
b9944a77 DE |
1200 | |
1201 | /* goto end; */ | |
1202 | ||
1203 | #ifdef CCDM_DEVELOP | |
1204 | show_self_hash(); | |
1205 | #endif | |
1206 | #ifdef CCDM_FIRST_STAGE | |
1207 | result = first_stage_init(); | |
1208 | if (result) { | |
1209 | puts("1st stage init failed\n"); | |
1210 | goto failure; | |
1211 | } | |
1212 | #endif | |
1213 | #ifdef CCDM_SECOND_STAGE | |
1214 | result = second_stage_init(); | |
1215 | if (result) { | |
1216 | puts("2nd stage init failed\n"); | |
1217 | goto failure; | |
1218 | } | |
1219 | #endif | |
1220 | ||
1221 | goto end; | |
1222 | failure: | |
1223 | result = 1; | |
1224 | end: | |
35ecf752 | 1225 | i2c_set_bus_num(orig_i2c_bus); |
b9944a77 DE |
1226 | if (result) |
1227 | ccdm_hang(); | |
1228 | ||
1229 | return result; | |
1230 | } |