summaryrefslogtreecommitdiffstats
path: root/dummyflasher.c
blob: 822bc736589962239ce138a724cebb1337d7d4df (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
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2009,2010 Carl-Daniel Hailfinger
 *
 * 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; version 2 of the License.
 *
 * 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 <string.h>
#include <stdlib.h>
#include "flash.h"
#include "chipdrivers.h"
#include "programmer.h"

/* Remove the #define below if you don't want SPI flash chip emulation. */
#define EMULATE_SPI_CHIP 1

#if EMULATE_SPI_CHIP
#define EMULATE_CHIP 1
#include "spi.h"
#endif

#if EMULATE_CHIP
#include <sys/types.h>
#include <sys/stat.h>
#endif

#if EMULATE_CHIP
static uint8_t *flashchip_contents = NULL;
enum emu_chip {
	EMULATE_NONE,
	EMULATE_ST_M25P10_RES,
	EMULATE_SST_SST25VF040_REMS,
	EMULATE_SST_SST25VF032B,
};
static enum emu_chip emu_chip = EMULATE_NONE;
static char *emu_persistent_image = NULL;
static int emu_chip_size = 0;
#if EMULATE_SPI_CHIP
static int emu_max_byteprogram_size = 0;
static int emu_max_aai_size = 0;
static int emu_jedec_se_size = 0;
static int emu_jedec_be_52_size = 0;
static int emu_jedec_be_d8_size = 0;
static int emu_jedec_ce_60_size = 0;
static int emu_jedec_ce_c7_size = 0;
#endif
#endif

static int spi_write_256_chunksize = 256;

static int dummy_spi_send_command(unsigned int writecnt, unsigned int readcnt,
		      const unsigned char *writearr, unsigned char *readarr);
static int dummy_spi_write_256(struct flashchip *flash, uint8_t *buf,
			       int start, int len);

static const struct spi_programmer spi_programmer_dummyflasher = {
	.type		= SPI_CONTROLLER_DUMMY,
	.max_data_read	= MAX_DATA_READ_UNLIMITED,
	.max_data_write	= MAX_DATA_UNSPECIFIED,
	.command	= dummy_spi_send_command,
	.multicommand	= default_spi_send_multicommand,
	.read		= default_spi_read,
	.write_256	= dummy_spi_write_256,
};

static const struct par_programmer par_programmer_dummy = {
		.chip_readb		= dummy_chip_readb,
		.chip_readw		= dummy_chip_readw,
		.chip_readl		= dummy_chip_readl,
		.chip_readn		= dummy_chip_readn,
		.chip_writeb		= dummy_chip_writeb,
		.chip_writew		= dummy_chip_writew,
		.chip_writel		= dummy_chip_writel,
		.chip_writen		= dummy_chip_writen,
};

enum chipbustype dummy_buses_supported = BUS_NONE;

static int dummy_shutdown(void *data)
{
	msg_pspew("%s\n", __func__);
#if EMULATE_CHIP
	if (emu_chip != EMULATE_NONE) {
		if (emu_persistent_image) {
			msg_pdbg("Writing %s\n", emu_persistent_image);
			write_buf_to_file(flashchip_contents, emu_chip_size,
					  emu_persistent_image);
		}
		free(flashchip_contents);
	}
#endif
	return 0;
}

int dummy_init(void)
{
	char *bustext = NULL;
	char *tmp = NULL;
#if EMULATE_CHIP
	struct stat image_stat;
#endif

	msg_pspew("%s\n", __func__);

	bustext = extract_programmer_param("bus");
	msg_pdbg("Requested buses are: %s\n", bustext ? bustext : "default");
	if (!bustext)
		bustext = strdup("parallel+lpc+fwh+spi");
	/* Convert the parameters to lowercase. */
	tolower_string(bustext);

	dummy_buses_supported = BUS_NONE;
	if (strstr(bustext, "parallel")) {
		dummy_buses_supported |= BUS_PARALLEL;
		msg_pdbg("Enabling support for %s flash.\n", "parallel");
	}
	if (strstr(bustext, "lpc")) {
		dummy_buses_supported |= BUS_LPC;
		msg_pdbg("Enabling support for %s flash.\n", "LPC");
	}
	if (strstr(bustext, "fwh")) {
		dummy_buses_supported |= BUS_FWH;
		msg_pdbg("Enabling support for %s flash.\n", "FWH");
	}
	if (strstr(bustext, "spi")) {
		dummy_buses_supported |= BUS_SPI;
		msg_pdbg("Enabling support for %s flash.\n", "SPI");
	}
	if (dummy_buses_supported == BUS_NONE)
		msg_pdbg("Support for all flash bus types disabled.\n");
	free(bustext);

	tmp = extract_programmer_param("spi_write_256_chunksize");
	if (tmp) {
		spi_write_256_chunksize = atoi(tmp);
		free(tmp);
		if (spi_write_256_chunksize < 1) {
			msg_perr("invalid spi_write_256_chunksize\n");
			return 1;
		}
	}

#if EMULATE_CHIP
	tmp = extract_programmer_param("emulate");
	if (!tmp) {
		msg_pdbg("Not emulating any flash chip.\n");
		/* Nothing else to do. */
		goto dummy_init_out;
	}
#if EMULATE_SPI_CHIP
	if (!strcmp(tmp, "M25P10.RES")) {
		emu_chip = EMULATE_ST_M25P10_RES;
		emu_chip_size = 128 * 1024;
		emu_max_byteprogram_size = 128;
		emu_max_aai_size = 0;
		emu_jedec_se_size = 0;
		emu_jedec_be_52_size = 0;
		emu_jedec_be_d8_size = 32 * 1024;
		emu_jedec_ce_60_size = 0;
		emu_jedec_ce_c7_size = emu_chip_size;
		msg_pdbg("Emulating ST M25P10.RES SPI flash chip (RES, page "
			 "write)\n");
	}
	if (!strcmp(tmp, "SST25VF040.REMS")) {
		emu_chip = EMULATE_SST_SST25VF040_REMS;
		emu_chip_size = 512 * 1024;
		emu_max_byteprogram_size = 1;
		emu_max_aai_size = 0;
		emu_jedec_se_size = 4 * 1024;
		emu_jedec_be_52_size = 32 * 1024;
		emu_jedec_be_d8_size = 0;
		emu_jedec_ce_60_size = emu_chip_size;
		emu_jedec_ce_c7_size = 0;
		msg_pdbg("Emulating SST SST25VF040.REMS SPI flash chip (REMS, "
			 "byte write)\n");
	}
	if (!strcmp(tmp, "SST25VF032B")) {
		emu_chip = EMULATE_SST_SST25VF032B;
		emu_chip_size = 4 * 1024 * 1024;
		emu_max_byteprogram_size = 1;
		emu_max_aai_size = 2;
		emu_jedec_se_size = 4 * 1024;
		emu_jedec_be_52_size = 32 * 1024;
		emu_jedec_be_d8_size = 64 * 1024;
		emu_jedec_ce_60_size = emu_chip_size;
		emu_jedec_ce_c7_size = emu_chip_size;
		msg_pdbg("Emulating SST SST25VF032B SPI flash chip (RDID, AAI "
			 "write)\n");
	}
#endif
	if (emu_chip == EMULATE_NONE) {
		msg_perr("Invalid chip specified for emulation: %s\n", tmp);
		free(tmp);
		return 1;
	}
	free(tmp);
	flashchip_contents = malloc(emu_chip_size);
	if (!flashchip_contents) {
		msg_perr("Out of memory!\n");
		return 1;
	}

	msg_pdbg("Filling fake flash chip with 0xff, size %i\n", emu_chip_size);
	memset(flashchip_contents, 0xff, emu_chip_size);

	emu_persistent_image = extract_programmer_param("image");
	if (!emu_persistent_image) {
		/* Nothing else to do. */
		goto dummy_init_out;
	}
	if (!stat(emu_persistent_image, &image_stat)) {
		msg_pdbg("Found persistent image %s, size %li ",
			 emu_persistent_image, (long)image_stat.st_size);
		if (image_stat.st_size == emu_chip_size) {
			msg_pdbg("matches.\n");
			msg_pdbg("Reading %s\n", emu_persistent_image);
			read_buf_from_file(flashchip_contents, emu_chip_size,
					   emu_persistent_image);
		} else {
			msg_pdbg("doesn't match.\n");
		}
	}
#endif

dummy_init_out:
	if (register_shutdown(dummy_shutdown, NULL)) {
		free(flashchip_contents);
		return 1;
	}
	if (dummy_buses_supported & (BUS_PARALLEL | BUS_LPC | BUS_FWH))
		register_par_programmer(&par_programmer_dummy,
					dummy_buses_supported &
						(BUS_PARALLEL | BUS_LPC |
						 BUS_FWH));
	if (dummy_buses_supported & BUS_SPI)
		register_spi_programmer(&spi_programmer_dummyflasher);

	return 0;
}

void *dummy_map(const char *descr, unsigned long phys_addr, size_t len)
{
	msg_pspew("%s: Mapping %s, 0x%lx bytes at 0x%08lx\n",
		  __func__, descr, (unsigned long)len, phys_addr);
	return (void *)phys_addr;
}

void dummy_unmap(void *virt_addr, size_t len)
{
	msg_pspew("%s: Unmapping 0x%lx bytes at %p\n",
		  __func__, (unsigned long)len, virt_addr);
}

void dummy_chip_writeb(uint8_t val, chipaddr addr)
{
	msg_pspew("%s: addr=0x%lx, val=0x%02x\n", __func__, addr, val);
}

void dummy_chip_writew(uint16_t val, chipaddr addr)
{
	msg_pspew("%s: addr=0x%lx, val=0x%04x\n", __func__, addr, val);
}

void dummy_chip_writel(uint32_t val, chipaddr addr)
{
	msg_pspew("%s: addr=0x%lx, val=0x%08x\n", __func__, addr, val);
}

void dummy_chip_writen(uint8_t *buf, chipaddr addr, size_t len)
{
	size_t i;
	msg_pspew("%s: addr=0x%lx, len=0x%08lx, writing data (hex):",
		  __func__, addr, (unsigned long)len);
	for (i = 0; i < len; i++) {
		if ((i % 16) == 0)
			msg_pspew("\n");
		msg_pspew("%02x ", buf[i]);
	}
}

uint8_t dummy_chip_readb(const chipaddr addr)
{
	msg_pspew("%s:  addr=0x%lx, returning 0xff\n", __func__, addr);
	return 0xff;
}

uint16_t dummy_chip_readw(const chipaddr addr)
{
	msg_pspew("%s:  addr=0x%lx, returning 0xffff\n", __func__, addr);
	return 0xffff;
}

uint32_t dummy_chip_readl(const chipaddr addr)
{
	msg_pspew("%s:  addr=0x%lx, returning 0xffffffff\n", __func__, addr);
	return 0xffffffff;
}

void dummy_chip_readn(uint8_t *buf, const chipaddr addr, size_t len)
{
	msg_pspew("%s:  addr=0x%lx, len=0x%lx, returning array of 0xff\n",
		  __func__, addr, (unsigned long)len);
	memset(buf, 0xff, len);
	return;
}

#if EMULATE_SPI_CHIP
static int emulate_spi_chip_response(unsigned int writecnt, unsigned int readcnt,
		      const unsigned char *writearr, unsigned char *readarr)
{
	int offs;
	static int aai_offs;
	static int aai_active = 0;

	if (writecnt == 0) {
		msg_perr("No command sent to the chip!\n");
		return 1;
	}
	/* TODO: Implement command blacklists here. */
	switch (writearr[0]) {
	case JEDEC_RES:
		if (emu_chip != EMULATE_ST_M25P10_RES)
			break;
		/* Respond with ST_M25P10_RES. */
		if (readcnt > 0)
			readarr[0] = 0x10;
		break;
	case JEDEC_REMS:
		if (emu_chip != EMULATE_SST_SST25VF040_REMS)
			break;
		/* Respond with SST_SST25VF040_REMS. */
		if (readcnt > 0)
			readarr[0] = 0xbf;
		if (readcnt > 1)
			readarr[1] = 0x44;
		break;
	case JEDEC_RDID:
		if (emu_chip != EMULATE_SST_SST25VF032B)
			break;
		/* Respond with SST_SST25VF032B. */
		if (readcnt > 0)
			readarr[0] = 0xbf;
		if (readcnt > 1)
			readarr[1] = 0x25;
		if (readcnt > 2)
			readarr[2] = 0x4a;
		break;
	case JEDEC_RDSR:
		memset(readarr, 0, readcnt);
		if (aai_active)
			memset(readarr, 1 << 6, readcnt);
		break;
	case JEDEC_READ:
		offs = writearr[1] << 16 | writearr[2] << 8 | writearr[3];
		/* Truncate to emu_chip_size. */
		offs %= emu_chip_size;
		if (readcnt > 0)
			memcpy(readarr, flashchip_contents + offs, readcnt);
		break;
	case JEDEC_BYTE_PROGRAM:
		offs = writearr[1] << 16 | writearr[2] << 8 | writearr[3];
		/* Truncate to emu_chip_size. */
		offs %= emu_chip_size;
		if (writecnt < 5) {
			msg_perr("BYTE PROGRAM size too short!\n");
			return 1;
		}
		if (writecnt - 4 > emu_max_byteprogram_size) {
			msg_perr("Max BYTE PROGRAM size exceeded!\n");
			return 1;
		}
		memcpy(flashchip_contents + offs, writearr + 4, writecnt - 4);
		break;
	case JEDEC_AAI_WORD_PROGRAM:
		if (!emu_max_aai_size)
			break;
		if (!aai_active) {
			if (writecnt < JEDEC_AAI_WORD_PROGRAM_OUTSIZE) {
				msg_perr("Initial AAI WORD PROGRAM size too "
					 "short!\n");
				return 1;
			}
			if (writecnt > JEDEC_AAI_WORD_PROGRAM_OUTSIZE) {
				msg_perr("Initial AAI WORD PROGRAM size too "
					 "long!\n");
				return 1;
			}
			aai_active = 1;
			aai_offs = writearr[1] << 16 | writearr[2] << 8 |
				   writearr[3];
			/* Truncate to emu_chip_size. */
			aai_offs %= emu_chip_size;
			memcpy(flashchip_contents + aai_offs, writearr + 4, 2);
			aai_offs += 2;
		} else {
			if (writecnt < JEDEC_AAI_WORD_PROGRAM_CONT_OUTSIZE) {
				msg_perr("Continuation AAI WORD PROGRAM size "
					 "too short!\n");
				return 1;
			}
			if (writecnt > JEDEC_AAI_WORD_PROGRAM_CONT_OUTSIZE) {
				msg_perr("Continuation AAI WORD PROGRAM size "
					 "too long!\n");
				return 1;
			}
			memcpy(flashchip_contents + aai_offs, writearr + 1, 2);
			aai_offs += 2;
		}
		break;
	case JEDEC_WRDI:
		if (!emu_max_aai_size)
			break;
		aai_active = 0;
		break;
	case JEDEC_SE:
		if (!emu_jedec_se_size)
			break;
		if (writecnt != JEDEC_SE_OUTSIZE) {
			msg_perr("SECTOR ERASE 0x20 outsize invalid!\n");
			return 1;
		}
		if (readcnt != JEDEC_SE_INSIZE) {
			msg_perr("SECTOR ERASE 0x20 insize invalid!\n");
			return 1;
		}
		offs = writearr[1] << 16 | writearr[2] << 8 | writearr[3];
		if (offs & (emu_jedec_se_size - 1))
			msg_pdbg("Unaligned SECTOR ERASE 0x20: 0x%x\n", offs);
		offs &= ~(emu_jedec_se_size - 1);
		memset(flashchip_contents + offs, 0xff, emu_jedec_se_size);
		break;
	case JEDEC_BE_52:
		if (!emu_jedec_be_52_size)
			break;
		if (writecnt != JEDEC_BE_52_OUTSIZE) {
			msg_perr("BLOCK ERASE 0x52 outsize invalid!\n");
			return 1;
		}
		if (readcnt != JEDEC_BE_52_INSIZE) {
			msg_perr("BLOCK ERASE 0x52 insize invalid!\n");
			return 1;
		}
		offs = writearr[1] << 16 | writearr[2] << 8 | writearr[3];
		if (offs & (emu_jedec_be_52_size - 1))
			msg_pdbg("Unaligned BLOCK ERASE 0x52: 0x%x\n", offs);
		offs &= ~(emu_jedec_be_52_size - 1);
		memset(flashchip_contents + offs, 0xff, emu_jedec_be_52_size);
		break;
	case JEDEC_BE_D8:
		if (!emu_jedec_be_d8_size)
			break;
		if (writecnt != JEDEC_BE_D8_OUTSIZE) {
			msg_perr("BLOCK ERASE 0xd8 outsize invalid!\n");
			return 1;
		}
		if (readcnt != JEDEC_BE_D8_INSIZE) {
			msg_perr("BLOCK ERASE 0xd8 insize invalid!\n");
			return 1;
		}
		offs = writearr[1] << 16 | writearr[2] << 8 | writearr[3];
		if (offs & (emu_jedec_be_d8_size - 1))
			msg_pdbg("Unaligned BLOCK ERASE 0xd8: 0x%x\n", offs);
		offs &= ~(emu_jedec_be_d8_size - 1);
		memset(flashchip_contents + offs, 0xff, emu_jedec_be_d8_size);
		break;
	case JEDEC_CE_60:
		if (!emu_jedec_ce_60_size)
			break;
		if (writecnt != JEDEC_CE_60_OUTSIZE) {
			msg_perr("CHIP ERASE 0x60 outsize invalid!\n");
			return 1;
		}
		if (readcnt != JEDEC_CE_60_INSIZE) {
			msg_perr("CHIP ERASE 0x60 insize invalid!\n");
			return 1;
		}
		/* JEDEC_CE_60_OUTSIZE is 1 (no address) -> no offset. */
		/* emu_jedec_ce_60_size is emu_chip_size. */
		memset(flashchip_contents, 0xff, emu_jedec_ce_60_size);
		break;
	case JEDEC_CE_C7:
		if (!emu_jedec_ce_c7_size)
			break;
		if (writecnt != JEDEC_CE_C7_OUTSIZE) {
			msg_perr("CHIP ERASE 0xc7 outsize invalid!\n");
			return 1;
		}
		if (readcnt != JEDEC_CE_C7_INSIZE) {
			msg_perr("CHIP ERASE 0xc7 insize invalid!\n");
			return 1;
		}
		/* JEDEC_CE_C7_OUTSIZE is 1 (no address) -> no offset. */
		/* emu_jedec_ce_c7_size is emu_chip_size. */
		memset(flashchip_contents, 0xff, emu_jedec_ce_c7_size);
		break;
	default:
		/* No special response. */
		break;
	}
	return 0;
}
#endif

static int dummy_spi_send_command(unsigned int writecnt, unsigned int readcnt,
		      const unsigned char *writearr, unsigned char *readarr)
{
	int i;

	msg_pspew("%s:", __func__);

	msg_pspew(" writing %u bytes:", writecnt);
	for (i = 0; i < writecnt; i++)
		msg_pspew(" 0x%02x", writearr[i]);

	/* Response for unknown commands and missing chip is 0xff. */
	memset(readarr, 0xff, readcnt);
#if EMULATE_SPI_CHIP
	switch (emu_chip) {
	case EMULATE_ST_M25P10_RES:
	case EMULATE_SST_SST25VF040_REMS:
	case EMULATE_SST_SST25VF032B:
		if (emulate_spi_chip_response(writecnt, readcnt, writearr,
					      readarr)) {
			msg_perr("Invalid command sent to flash chip!\n");
			return 1;
		}
		break;
	default:
		break;
	}
#endif
	msg_pspew(" reading %u bytes:", readcnt);
	for (i = 0; i < readcnt; i++)
		msg_pspew(" 0x%02x", readarr[i]);
	msg_pspew("\n");
	return 0;
}

static int dummy_spi_write_256(struct flashchip *flash, uint8_t *buf,
			       int start, int len)
{
	return spi_write_chunked(flash, buf, start, len,
				 spi_write_256_chunksize);
}