summaryrefslogtreecommitdiff
path: root/util/flashrom/flashrom.c
blob: 36462a4bc9b804a7a4d9067cb2b02956620f5925 (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
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2000 Silicon Integrated System Corporation
 * Copyright (C) 2004 Tyan Corp <yhlu@tyan.com>
 * Copyright (C) 2005-2007 coresystems GmbH 
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <pci/pci.h>
/* for iopl */
#if defined (__sun) && (defined(__i386) || defined(__amd64))
#include <strings.h>
#include <sys/sysi86.h>
#include <sys/psw.h>
#include <asm/sunddi.h>
#endif
#include "flash.h"

char *chip_to_probe = NULL;
struct pci_access *pacc;	/* For board and chipset_enable */
int exclude_start_page, exclude_end_page;
int force = 0, verbose = 0;
int fd_mem;

struct pci_dev *pci_dev_find(uint16_t vendor, uint16_t device)
{
	struct pci_dev *temp;
	struct pci_filter filter;

	pci_filter_init(NULL, &filter);
	filter.vendor = vendor;
	filter.device = device;

	for (temp = pacc->devices; temp; temp = temp->next)
		if (pci_filter_match(&filter, temp))
			return temp;

	return NULL;
}

struct pci_dev *pci_card_find(uint16_t vendor, uint16_t device,
			      uint16_t card_vendor, uint16_t card_device)
{
	struct pci_dev *temp;
	struct pci_filter filter;

	pci_filter_init(NULL, &filter);
	filter.vendor = vendor;
	filter.device = device;

	for (temp = pacc->devices; temp; temp = temp->next)
		if (pci_filter_match(&filter, temp)) {
			if ((card_vendor == pci_read_word(temp, 0x2C)) &&
			    (card_device == pci_read_word(temp, 0x2E)))
				return temp;
		}

	return NULL;
}

int map_flash_registers(struct flashchip *flash)
{
	volatile uint8_t *registers;
	size_t size = flash->total_size * 1024;

	registers = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
			 fd_mem, (off_t) (0xFFFFFFFF - 0x400000 - size + 1));

	if (registers == MAP_FAILED) {
		perror("Can't mmap registers using " MEM_DEV);
		exit(1);
	}
	flash->virtual_registers = registers;

	return 0;
}

struct flashchip *probe_flash(struct flashchip *flash)
{
	volatile uint8_t *bios;
	unsigned long flash_baseaddr, size;

	while (flash->name != NULL) {
		if (chip_to_probe && strcmp(flash->name, chip_to_probe) != 0) {
			flash++;
			continue;
		}
		printf_debug("Probing for %s, %d KB\n",
			     flash->name, flash->total_size);

		size = flash->total_size * 1024;

#ifdef TS5300
		// FIXME: Wrong place for this decision
		// FIXME: This should be autodetected. It is trivial.
		flash_baseaddr = 0x9400000;
#else
		flash_baseaddr = (0xffffffff - size + 1);
#endif

		/* If getpagesize() > size -> 
		 * "Can't mmap memory using /dev/mem: Invalid argument"
		 * This should never happen as we don't support any flash chips
		 * smaller than 4k or 8k (yet).
		 */

		if (getpagesize() > size) {
			size = getpagesize();
			printf("WARNING: size: %d -> %ld (page size)\n",
			       flash->total_size * 1024, (unsigned long)size);
		}

		bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
			    fd_mem, (off_t) flash_baseaddr);
		if (bios == MAP_FAILED) {
			perror("Can't mmap memory using " MEM_DEV);
			exit(1);
		}
		flash->virtual_memory = bios;

		if (flash->probe(flash) == 1) {
			printf("%s found at physical address: 0x%lx\n",
			       flash->name, flash_baseaddr);
			return flash;
		}
		munmap((void *)bios, size);

		flash++;
	}

	return NULL;
}

int verify_flash(struct flashchip *flash, uint8_t *buf)
{
	int idx;
	int total_size = flash->total_size * 1024;
	volatile uint8_t *bios = flash->virtual_memory;

	printf("Verifying flash ");

	if (verbose)
		printf("address: 0x00000000\b\b\b\b\b\b\b\b\b\b");

	for (idx = 0; idx < total_size; idx++) {
		if (verbose && ((idx & 0xfff) == 0xfff))
			printf("0x%08x", idx);

		if (*(bios + idx) != *(buf + idx)) {
			if (verbose) {
				printf("0x%08x ", idx);
			}
			printf("- FAILED\n");
			return 1;
		}

		if (verbose && ((idx & 0xfff) == 0xfff))
			printf("\b\b\b\b\b\b\b\b\b\b");
	}
	if (verbose)
		printf("\b\b\b\b\b\b\b\b\b\b ");

	printf("- VERIFIED         \n");

	return 0;
}

void usage(const char *name)
{
	printf("usage: %s [-rwvEVfh] [-c chipname] [-s exclude_start]\n", name);
	printf("       [-e exclude_end] [-m vendor:part] [-l file.layout] [-i imagename] [file]\n");
	printf
	    ("   -r | --read:                    read flash and save into file\n"
	     "   -w | --write:                   write file into flash (default when\n"
	     "                                   file is specified)\n"
	     "   -v | --verify:                  verify flash against file\n"
	     "   -E | --erase:                   erase flash device\n"
	     "   -V | --verbose:                 more verbose output\n"
	     "   -c | --chip <chipname>:         probe only for specified flash chip\n"
	     "   -s | --estart <addr>:           exclude start position\n"
	     "   -e | --eend <addr>:             exclude end postion\n"
	     "   -m | --mainboard <vendor:part>: override mainboard settings\n"
	     "   -f | --force:                   force write without checking image\n"
	     "   -l | --layout <file.layout>:    read rom layout from file\n"
	     "   -i | --image <name>:            only flash image name from flash layout\n"
	     "\n" " If no file is specified, then all that happens\n"
	     " is that flash info is dumped.\n\n");
	exit(1);
}

int main(int argc, char *argv[])
{
	uint8_t *buf;
	unsigned long size;
	FILE *image;
	struct flashchip *flash;
	int opt;
	int option_index = 0;
	int read_it = 0, write_it = 0, erase_it = 0, verify_it = 0;
	int ret = 0;

	static struct option long_options[] = {
		{"read", 0, 0, 'r'},
		{"write", 0, 0, 'w'},
		{"erase", 0, 0, 'E'},
		{"verify", 0, 0, 'v'},
		{"chip", 1, 0, 'c'},
		{"estart", 1, 0, 's'},
		{"eend", 1, 0, 'e'},
		{"mainboard", 1, 0, 'm'},
		{"verbose", 0, 0, 'V'},
		{"force", 0, 0, 'f'},
		{"layout", 1, 0, 'l'},
		{"image", 1, 0, 'i'},
		{"help", 0, 0, 'h'},
		{0, 0, 0, 0}
	};

	char *filename = NULL;

	unsigned int exclude_start_position = 0, exclude_end_position = 0;	// [x,y)
	char *tempstr = NULL, *tempstr2 = NULL;

	if (argc > 1) {
		/* Yes, print them. */
		int i;
		printf_debug("The arguments are:\n");
		for (i = 1; i < argc; ++i)
			printf_debug("%s\n", argv[i]);
	}

	setbuf(stdout, NULL);
	while ((opt = getopt_long(argc, argv, "rwvVEfc:s:e:m:l:i:h",
				  long_options, &option_index)) != EOF) {
		switch (opt) {
		case 'r':
			read_it = 1;
			break;
		case 'w':
			write_it = 1;
			break;
		case 'v':
			verify_it = 1;
			break;
		case 'c':
			chip_to_probe = strdup(optarg);
			break;
		case 'V':
			verbose = 1;
			break;
		case 'E':
			erase_it = 1;
			break;
		case 's':
			tempstr = strdup(optarg);
			sscanf(tempstr, "%x", &exclude_start_position);
			break;
		case 'e':
			tempstr = strdup(optarg);
			sscanf(tempstr, "%x", &exclude_end_position);
			break;
		case 'm':
			tempstr = strdup(optarg);
			strtok(tempstr, ":");
			tempstr2 = strtok(NULL, ":");
			if (tempstr2) {
				lb_vendor = tempstr;
				lb_part = tempstr2;
			} else {
				printf("warning: ignored wrong format of"
				       " mainboard: %s\n", tempstr);
			}
			break;
		case 'f':
			force = 1;
			break;
		case 'l':
			tempstr = strdup(optarg);
			if (read_romlayout(tempstr))
				exit(1);
			break;
		case 'i':
			tempstr = strdup(optarg);
			find_romentry(tempstr);
			break;
		case 'h':
		default:
			usage(argv[0]);
			break;
		}
	}

	if (read_it && write_it) {
		printf("-r and -w are mutually exclusive\n");
		usage(argv[0]);
	}

	if (optind < argc)
		filename = argv[optind++];

	/* First get full io access */
#if defined (__sun) && (defined(__i386) || defined(__amd64))
	if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) {
#else
	if (iopl(3) != 0) {
#endif
		fprintf(stderr, "ERROR: iopl failed: \"%s\"\n",
			strerror(errno));
		exit(1);
	}

	/* Initialize PCI access for flash enables */
	pacc = pci_alloc();	/* Get the pci_access structure */
	/* Set all options you want -- here we stick with the defaults */
	pci_init(pacc);		/* Initialize the PCI library */
	pci_scan_bus(pacc);	/* We want to get the list of devices */

	/* Open the memory device. A lot of functions need it */
	if ((fd_mem = open(MEM_DEV, O_RDWR)) < 0) {
		perror("Error: Can not access memory using " MEM_DEV
		       ". You need to be root.");
		exit(1);
	}

	myusec_calibrate_delay();

	/* We look at the lbtable first to see if we need a
	 * mainboard specific flash enable sequence.
	 */
	linuxbios_init();

	/* try to enable it. Failure IS an option, since not all motherboards
	 * really need this to be done, etc., etc.
	 */
	ret = chipset_flash_enable();
	if (ret == -2) {
		printf("WARNING: No chipset found. Flash detection "
		       "will most likely fail.\n");
	}

	board_flash_enable(lb_vendor, lb_part);

	if ((flash = probe_flash(flashchips)) == NULL) {
		printf("No EEPROM/flash device found.\n");
		exit(1);
	}

	printf("Flash part is %s (%d KB)\n", flash->name, flash->total_size);

	if (!filename && !erase_it) {
		// FIXME: Do we really want this feature implicitly?
		printf("OK, only ENABLING flash write, but NOT FLASHING.\n");
		return 0;
	}

	size = flash->total_size * 1024;
	buf = (uint8_t *) calloc(size, sizeof(char));

	if (erase_it) {
		printf("Erasing flash chip\n");
		flash->erase(flash);
		exit(0);
	} else if (read_it) {
		if ((image = fopen(filename, "w")) == NULL) {
			perror(filename);
			exit(1);
		}
		printf("Reading Flash...");
		if (flash->read == NULL)
			memcpy(buf, (const char *)flash->virtual_memory, size);
		else
			flash->read(flash, buf);

		if (exclude_end_position - exclude_start_position > 0)
			memset(buf + exclude_start_position, 0,
			       exclude_end_position - exclude_start_position);

		fwrite(buf, sizeof(char), size, image);
		fclose(image);
		printf("done\n");
	} else {
		struct stat image_stat;

		if ((image = fopen(filename, "r")) == NULL) {
			perror(filename);
			exit(1);
		}
		if (fstat(fileno(image), &image_stat) != 0) {
			perror(filename);
			exit(1);
		}
		if (image_stat.st_size != flash->total_size * 1024) {
			fprintf(stderr, "Error: Image size doesnt match\n");
			exit(1);
		}

		fread(buf, sizeof(char), size, image);
		show_id(buf, size);
		fclose(image);
	}

	/* exclude range stuff. Nice idea, but at the moment it is only
	 * supported in hardware by the pm49fl004 chips. 
	 * Instead of implementing this for all chips I suggest advancing
	 * it to the rom layout feature below and drop exclude range
	 * completely once all flash chips can do rom layouts. stepan
	 */

	// ////////////////////////////////////////////////////////////
	if (exclude_end_position - exclude_start_position > 0)
		memcpy(buf + exclude_start_position,
		       (const char *)flash->virtual_memory +
		       exclude_start_position,
		       exclude_end_position - exclude_start_position);

	exclude_start_page = exclude_start_position / flash->page_size;
	if ((exclude_start_position % flash->page_size) != 0) {
		exclude_start_page++;
	}
	exclude_end_page = exclude_end_position / flash->page_size;
	// ////////////////////////////////////////////////////////////

	// This should be moved into each flash part's code to do it 
	// cleanly. This does the job.
	handle_romentries(buf, (uint8_t *) flash->virtual_memory);

	// ////////////////////////////////////////////////////////////

	if (write_it)
		ret |= flash->write(flash, buf);

	if (verify_it)
		ret |= verify_flash(flash, buf);

	return ret;
}