aboutsummaryrefslogtreecommitdiffstats
path: root/libflashrom.c
blob: 44f297f6601820c0d51c9efef653aea659808c39 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2012, 2016 secunet Security Networks AG
 * (Written by Nico Huber <nico.huber@secunet.com> for secunet)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>

#include "flash.h"
#include "fmap.h"
#include "programmer.h"
#include "layout.h"
#include "ich_descriptors.h"
#include "libflashrom.h"
#include "writeprotect.h"


/** Pointer to log callback function. */
static flashrom_log_callback *global_log_callback = NULL;

int flashrom_init(const int perform_selfcheck)
{
	if (perform_selfcheck && selfcheck())
		return 1;
	myusec_calibrate_delay();
	return 0;
}

int flashrom_shutdown(void)
{
	return 0; /* TODO: nothing to do? */
}

/* TODO: flashrom_set_loglevel()? do we need it?
         For now, let the user decide in their callback. */
void flashrom_set_log_callback(flashrom_log_callback *const log_callback)
{
	global_log_callback = log_callback;
}
/** @private */
int print(const enum flashrom_log_level level, const char *const fmt, ...)
{
	if (global_log_callback) {
		int ret;
		va_list args;
		va_start(args, fmt);
		ret = global_log_callback(level, fmt, args);
		va_end(args);
		return ret;
	}
	return 0;
}

void flashrom_set_progress_callback(struct flashrom_flashctx *flashctx, flashrom_progress_callback *progress_callback, struct flashrom_progress *progress_state)
{
	flashctx->progress_callback = progress_callback;
	flashctx->progress_state = progress_state;
}
/** @private */
void update_progress(struct flashrom_flashctx *flashctx, enum flashrom_progress_stage stage, size_t current, size_t total)
{
	if (flashctx->progress_callback == NULL)
		return;
	if (current > total)
		current = total;

	flashctx->progress_state->stage = stage;
	flashctx->progress_state->current = current;
	flashctx->progress_state->total = total;
	flashctx->progress_callback(flashctx);
}

const char *flashrom_version_info(void)
{
	return flashrom_version;
}

struct flashrom_flashchip_info *flashrom_supported_flash_chips(void)
{
	struct flashrom_flashchip_info *supported_flashchips =
		malloc(flashchips_size * sizeof(*supported_flashchips));

	if (!supported_flashchips) {
		msg_gerr("Memory allocation error!\n");
		return NULL;
	}

	for (unsigned int i = 0; i < flashchips_size; ++i) {
		supported_flashchips[i].vendor = flashchips[i].vendor;
		supported_flashchips[i].name = flashchips[i].name;
		supported_flashchips[i].tested.erase =
			(enum flashrom_test_state)flashchips[i].tested.erase;
		supported_flashchips[i].tested.probe =
			(enum flashrom_test_state)flashchips[i].tested.probe;
		supported_flashchips[i].tested.read =
			(enum flashrom_test_state)flashchips[i].tested.read;
		supported_flashchips[i].tested.write =
			(enum flashrom_test_state)flashchips[i].tested.write;
		supported_flashchips[i].total_size = flashchips[i].total_size;
	}

	return supported_flashchips;
}

struct flashrom_board_info *flashrom_supported_boards(void)
{
#if CONFIG_INTERNAL == 1
	int boards_known_size = 0;
	const struct board_info *binfo = boards_known;

	while ((binfo++)->vendor)
		++boards_known_size;
	binfo = boards_known;
	/* add place for {0} */
	++boards_known_size;

	struct flashrom_board_info *supported_boards =
		malloc(boards_known_size * sizeof(*supported_boards));

	if (!supported_boards) {
		msg_gerr("Memory allocation error!\n");
		return NULL;
	}

	for (int i = 0; i < boards_known_size; ++i) {
		supported_boards[i].vendor = binfo[i].vendor;
		supported_boards[i].name = binfo[i].name;
		supported_boards[i].working =
			(enum flashrom_test_state) binfo[i].working;
	}

	return supported_boards;
#else
	return NULL;
#endif
}

struct flashrom_chipset_info *flashrom_supported_chipsets(void)
{
#if CONFIG_INTERNAL == 1
	int chipset_enables_size = 0;
	const struct penable *chipset = chipset_enables;

	while ((chipset++)->vendor_name)
		++chipset_enables_size;
	chipset = chipset_enables;
	/* add place for {0}*/
	++chipset_enables_size;

	struct flashrom_chipset_info *supported_chipsets =
		malloc(chipset_enables_size * sizeof(*supported_chipsets));

	if (!supported_chipsets) {
		msg_gerr("Memory allocation error!\n");
		return NULL;
	}

	for (int i = 0; i < chipset_enables_size; ++i) {
		supported_chipsets[i].vendor = chipset[i].vendor_name;
		supported_chipsets[i].chipset = chipset[i].device_name;
		supported_chipsets[i].vendor_id = chipset[i].vendor_id;
		supported_chipsets[i].chipset_id = chipset[i].device_id;
		supported_chipsets[i].status =
			(enum flashrom_test_state) chipset[i].status;
	}

	return supported_chipsets;
#else
	return NULL;
#endif
}

int flashrom_data_free(void *const p)
{
	free(p);
	return 0;
}

int flashrom_programmer_init(struct flashrom_programmer **const flashprog,
			     const char *const prog_name, const char *const prog_param)
{
	unsigned prog;

	for (prog = 0; prog < programmer_table_size; prog++) {
		if (strcmp(prog_name, programmer_table[prog]->name) == 0)
			break;
	}
	if (prog >= programmer_table_size) {
		msg_ginfo("Error: Unknown programmer \"%s\". Valid choices are:\n", prog_name);
		list_programmers_linebreak(0, 80, 0);
		return 1;
	}
	return programmer_init(programmer_table[prog], prog_param);
}

int flashrom_programmer_shutdown(struct flashrom_programmer *const flashprog)
{
	return programmer_shutdown();
}

/* TODO: flashrom_programmer_capabilities()? */

int flashrom_flash_probe(struct flashrom_flashctx **const flashctx,
			 const struct flashrom_programmer *const flashprog,
			 const char *const chip_name)
{
	int i, ret = 2;
	struct flashrom_flashctx second_flashctx = { 0, };

	*flashctx = malloc(sizeof(**flashctx));
	if (!*flashctx)
		return 1;
	memset(*flashctx, 0, sizeof(**flashctx));

	for (i = 0; i < registered_master_count; ++i) {
		int flash_idx = -1;
		if (!ret || (flash_idx = probe_flash(&registered_masters[i], 0, *flashctx, 0, chip_name)) != -1) {
			ret = 0;
			/* We found one chip, now check that there is no second match. */
			if (probe_flash(&registered_masters[i], flash_idx + 1, &second_flashctx, 0, chip_name) != -1) {
				flashrom_layout_release(second_flashctx.default_layout);
				free(second_flashctx.chip);
				ret = 3;
				break;
			}
		}
	}
	if (ret) {
		flashrom_flash_release(*flashctx);
		*flashctx = NULL;
	}
	return ret;
}

size_t flashrom_flash_getsize(const struct flashrom_flashctx *const flashctx)
{
	return flashctx->chip->total_size * 1024;
}

void flashrom_flash_release(struct flashrom_flashctx *const flashctx)
{
	if (!flashctx)
		return;

	flashrom_layout_release(flashctx->default_layout);
	free(flashctx->chip);
	free(flashctx);
}

void flashrom_flag_set(struct flashrom_flashctx *const flashctx,
		       const enum flashrom_flag flag, const bool value)
{
	switch (flag) {
		case FLASHROM_FLAG_FORCE:		flashctx->flags.force = value; break;
		case FLASHROM_FLAG_FORCE_BOARDMISMATCH:	flashctx->flags.force_boardmismatch = value; break;
		case FLASHROM_FLAG_VERIFY_AFTER_WRITE:	flashctx->flags.verify_after_write = value; break;
		case FLASHROM_FLAG_VERIFY_WHOLE_CHIP:	flashctx->flags.verify_whole_chip = value; break;
	}
}

bool flashrom_flag_get(const struct flashrom_flashctx *const flashctx, const enum flashrom_flag flag)
{
	switch (flag) {
		case FLASHROM_FLAG_FORCE:		return flashctx->flags.force;
		case FLASHROM_FLAG_FORCE_BOARDMISMATCH:	return flashctx->flags.force_boardmismatch;
		case FLASHROM_FLAG_VERIFY_AFTER_WRITE:	return flashctx->flags.verify_after_write;
		case FLASHROM_FLAG_VERIFY_WHOLE_CHIP:	return flashctx->flags.verify_whole_chip;
		default:				return false;
	}
}

int flashrom_layout_read_from_ifd(struct flashrom_layout **const layout, struct flashctx *const flashctx,
				  const void *const dump, const size_t len)
{
#ifndef __FLASHROM_LITTLE_ENDIAN__
	return 6;
#else
	struct flashrom_layout *dump_layout = NULL, *chip_layout = NULL;
	int ret = 1;

	void *const desc = malloc(0x1000);
	if (prepare_flash_access(flashctx, true, false, false, false))
		goto _free_ret;

	msg_cinfo("Reading ich descriptor... ");
	if (read_flash(flashctx, desc, 0, 0x1000)) {
		msg_cerr("Read operation failed!\n");
		msg_cinfo("FAILED.\n");
		ret = 2;
		goto _finalize_ret;
	}
	msg_cinfo("done.\n");

	if (layout_from_ich_descriptors(&chip_layout, desc, 0x1000)) {
		msg_cerr("Couldn't parse the descriptor!\n");
		ret = 3;
		goto _finalize_ret;
	}

	if (dump) {
		if (layout_from_ich_descriptors(&dump_layout, dump, len)) {
			msg_cerr("Couldn't parse the descriptor!\n");
			ret = 4;
			goto _finalize_ret;
		}

		const struct romentry *chip_entry = layout_next(chip_layout, NULL);
		const struct romentry *dump_entry = layout_next(dump_layout, NULL);
		while (chip_entry && dump_entry && !memcmp(chip_entry, dump_entry, sizeof(*chip_entry))) {
			chip_entry = layout_next(chip_layout, chip_entry);
			dump_entry = layout_next(dump_layout, dump_entry);
		}
		flashrom_layout_release(dump_layout);
		if (chip_entry || dump_entry) {
			msg_cerr("Descriptors don't match!\n");
			ret = 5;
			goto _finalize_ret;
		}
	}

	*layout = (struct flashrom_layout *)chip_layout;
	ret = 0;

_finalize_ret:
	finalize_flash_access(flashctx);
_free_ret:
	if (ret)
		flashrom_layout_release(chip_layout);
	free(desc);
	return ret;
#endif
}

#ifdef __FLASHROM_LITTLE_ENDIAN__
static int flashrom_layout_parse_fmap(struct flashrom_layout **layout,
		struct flashctx *const flashctx, const struct fmap *const fmap)
{
	int i;
	char name[FMAP_STRLEN + 1];
	const struct fmap_area *area;
	struct flashrom_layout *l;

	if (!fmap || flashrom_layout_new(&l))
		return 1;

	for (i = 0, area = fmap->areas; i < fmap->nareas; i++, area++) {
		snprintf(name, sizeof(name), "%s", area->name);
		if (flashrom_layout_add_region(l, area->offset, area->offset + area->size - 1, name)) {
			flashrom_layout_release(l);
			return 1;
		}
	}

	*layout = l;
	return 0;
}
#endif /* __FLASHROM_LITTLE_ENDIAN__ */

int flashrom_layout_read_fmap_from_rom(struct flashrom_layout **const layout,
		struct flashctx *const flashctx, size_t offset, size_t len)
{
#ifndef __FLASHROM_LITTLE_ENDIAN__
	return 3;
#else
	struct fmap *fmap = NULL;
	int ret = 0;

	msg_gdbg("Attempting to read fmap from ROM content.\n");
	if (fmap_read_from_rom(&fmap, flashctx, offset, len)) {
		msg_gerr("Failed to read fmap from ROM.\n");
		return 1;
	}

	msg_gdbg("Adding fmap layout to global layout.\n");
	if (flashrom_layout_parse_fmap(layout, flashctx, fmap)) {
		msg_gerr("Failed to add fmap regions to layout.\n");
		ret = 1;
	}

	free(fmap);
	return ret;
#endif
}

int flashrom_layout_read_fmap_from_buffer(struct flashrom_layout **const layout,
		struct flashctx *const flashctx, const uint8_t *const buf, size_t size)
{
#ifndef __FLASHROM_LITTLE_ENDIAN__
	return 3;
#else
	struct fmap *fmap = NULL;
	int ret = 1;

	if (!buf || !size)
		goto _ret;

	msg_gdbg("Attempting to read fmap from buffer.\n");
	if (fmap_read_from_buffer(&fmap, buf, size)) {
		msg_gerr("Failed to read fmap from buffer.\n");
		goto _ret;
	}

	msg_gdbg("Adding fmap layout to global layout.\n");
	if (flashrom_layout_parse_fmap(layout, flashctx, fmap)) {
		msg_gerr("Failed to add fmap regions to layout.\n");
		goto _free_ret;
	}

	ret = 0;
_free_ret:
	free(fmap);
_ret:
	return ret;
#endif
}

void flashrom_layout_set(struct flashrom_flashctx *const flashctx, const struct flashrom_layout *const layout)
{
	flashctx->layout = layout;
}

enum flashrom_wp_result flashrom_wp_cfg_new(struct flashrom_wp_cfg **cfg)
{
	*cfg = calloc(1, sizeof(**cfg));
	return *cfg ? 0 : FLASHROM_WP_ERR_OTHER;
}

void flashrom_wp_cfg_release(struct flashrom_wp_cfg *cfg)
{
	free(cfg);
}

void flashrom_wp_set_mode(struct flashrom_wp_cfg *cfg, enum flashrom_wp_mode mode)
{
	cfg->mode = mode;
}

enum flashrom_wp_mode flashrom_wp_get_mode(const struct flashrom_wp_cfg *cfg)
{
	return cfg->mode;
}

void flashrom_wp_set_range(struct flashrom_wp_cfg *cfg, size_t start, size_t len)
{
	cfg->range.start = start;
	cfg->range.len = len;
}

void flashrom_wp_get_range(size_t *start, size_t *len, const struct flashrom_wp_cfg *cfg)
{
	*start = cfg->range.start;
	*len = cfg->range.len;
}

enum flashrom_wp_result flashrom_wp_write_cfg(struct flashctx *flash, const struct flashrom_wp_cfg *cfg)
{
	if (flash->mst->buses_supported & BUS_PROG && flash->mst->opaque.wp_write_cfg)
		return flash->mst->opaque.wp_write_cfg(flash, cfg);

	if (wp_operations_available(flash))
		return wp_write_cfg(flash, cfg);

	return FLASHROM_WP_ERR_OTHER;
}

enum flashrom_wp_result flashrom_wp_read_cfg(struct flashrom_wp_cfg *cfg, struct flashctx *flash)
{
	if (flash->mst->buses_supported & BUS_PROG && flash->mst->opaque.wp_read_cfg)
		return flash->mst->opaque.wp_read_cfg(cfg, flash);

	if (wp_operations_available(flash))
		return wp_read_cfg(cfg, flash);

	return FLASHROM_WP_ERR_OTHER;
}

enum flashrom_wp_result flashrom_wp_get_available_ranges(struct flashrom_wp_ranges **list, struct flashrom_flashctx *flash)
{
	if (flash->mst->buses_supported & BUS_PROG && flash->mst->opaque.wp_get_ranges)
		return flash->mst->opaque.wp_get_ranges(list, flash);

	if (wp_operations_available(flash))
		return wp_get_available_ranges(list, flash);

	return FLASHROM_WP_ERR_OTHER;
}

size_t flashrom_wp_ranges_get_count(const struct flashrom_wp_ranges *list)
{
	return list->count;
}

enum flashrom_wp_result flashrom_wp_ranges_get_range(size_t *start, size_t *len, const struct flashrom_wp_ranges *list, unsigned int index)
{
	if (index >= list->count)
		return FLASHROM_WP_ERR_OTHER;

	*start = list->ranges[index].start;
	*len = list->ranges[index].len;

	return 0;
}

void flashrom_wp_ranges_release(struct flashrom_wp_ranges *list)
{
	if (!list)
		return;

	free(list->ranges);
	free(list);
}