summaryrefslogtreecommitdiff
path: root/drivers/mtd/spi/sandbox.c
blob: 1cf2f98310a17493a5a99cce29caa652cb9aabd1 (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
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
/*
 * Simulate a SPI flash
 *
 * Copyright (c) 2011-2013 The Chromium OS Authors.
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * Licensed under the GPL-2 or later.
 */

#include <common.h>
#include <dm.h>
#include <malloc.h>
#include <spi.h>
#include <os.h>

#include <spi_flash.h>
#include "sf_internal.h"

#include <asm/getopt.h>
#include <asm/spi.h>
#include <asm/state.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/uclass-internal.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * The different states that our SPI flash transitions between.
 * We need to keep track of this across multiple xfer calls since
 * the SPI bus could possibly call down into us multiple times.
 */
enum sandbox_sf_state {
	SF_CMD,   /* default state -- we're awaiting a command */
	SF_ID,    /* read the flash's (jedec) ID code */
	SF_ADDR,  /* processing the offset in the flash to read/etc... */
	SF_READ,  /* reading data from the flash */
	SF_WRITE, /* writing data to the flash, i.e. page programming */
	SF_ERASE, /* erase the flash */
	SF_READ_STATUS, /* read the flash's status register */
	SF_READ_STATUS1, /* read the flash's status register upper 8 bits*/
	SF_WRITE_STATUS, /* write the flash's status register */
};

static const char *sandbox_sf_state_name(enum sandbox_sf_state state)
{
	static const char * const states[] = {
		"CMD", "ID", "ADDR", "READ", "WRITE", "ERASE", "READ_STATUS",
		"READ_STATUS1", "WRITE_STATUS",
	};
	return states[state];
}

/* Bits for the status register */
#define STAT_WIP	(1 << 0)
#define STAT_WEL	(1 << 1)

/* Assume all SPI flashes have 3 byte addresses since they do atm */
#define SF_ADDR_LEN	3

#define IDCODE_LEN 3

/* Used to quickly bulk erase backing store */
static u8 sandbox_sf_0xff[0x1000];

/* Internal state data for each SPI flash */
struct sandbox_spi_flash {
	unsigned int cs;	/* Chip select we are attached to */
	/*
	 * As we receive data over the SPI bus, our flash transitions
	 * between states.  For example, we start off in the SF_CMD
	 * state where the first byte tells us what operation to perform
	 * (such as read or write the flash).  But the operation itself
	 * can go through a few states such as first reading in the
	 * offset in the flash to perform the requested operation.
	 * Thus "state" stores the exact state that our machine is in
	 * while "cmd" stores the overall command we're processing.
	 */
	enum sandbox_sf_state state;
	uint cmd;
	/* Erase size of current erase command */
	uint erase_size;
	/* Current position in the flash; used when reading/writing/etc... */
	uint off;
	/* How many address bytes we've consumed */
	uint addr_bytes, pad_addr_bytes;
	/* The current flash status (see STAT_XXX defines above) */
	u16 status;
	/* Data describing the flash we're emulating */
	const struct spi_flash_params *data;
	/* The file on disk to serv up data from */
	int fd;
};

struct sandbox_spi_flash_plat_data {
	const char *filename;
	const char *device_name;
	int bus;
	int cs;
};

/**
 * This is a very strange probe function. If it has platform data (which may
 * have come from the device tree) then this function gets the filename and
 * device type from there. Failing that it looks at the command line
 * parameter.
 */
static int sandbox_sf_probe(struct udevice *dev)
{
	/* spec = idcode:file */
	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
	const char *file;
	size_t len, idname_len;
	const struct spi_flash_params *data;
	struct sandbox_spi_flash_plat_data *pdata = dev_get_platdata(dev);
	struct sandbox_state *state = state_get_current();
	struct udevice *bus = dev->parent;
	const char *spec = NULL;
	int ret = 0;
	int cs = -1;
	int i;

	debug("%s: bus %d, looking for emul=%p: ", __func__, bus->seq, dev);
	if (bus->seq >= 0 && bus->seq < CONFIG_SANDBOX_SPI_MAX_BUS) {
		for (i = 0; i < CONFIG_SANDBOX_SPI_MAX_CS; i++) {
			if (state->spi[bus->seq][i].emul == dev)
				cs = i;
		}
	}
	if (cs == -1) {
		printf("Error: Unknown chip select for device '%s'",
		       dev->name);
		return -EINVAL;
	}
	debug("found at cs %d\n", cs);

	if (!pdata->filename) {
		struct sandbox_state *state = state_get_current();

		assert(bus->seq != -1);
		if (bus->seq < CONFIG_SANDBOX_SPI_MAX_BUS)
			spec = state->spi[bus->seq][cs].spec;
		if (!spec)
			return -ENOENT;

		file = strchr(spec, ':');
		if (!file) {
			printf("sandbox_sf: unable to parse file\n");
			ret = -EINVAL;
			goto error;
		}
		idname_len = file - spec;
		pdata->filename = file + 1;
		pdata->device_name = spec;
		++file;
	} else {
		spec = strchr(pdata->device_name, ',');
		if (spec)
			spec++;
		else
			spec = pdata->device_name;
		idname_len = strlen(spec);
	}
	debug("%s: device='%s'\n", __func__, spec);

	for (data = spi_flash_params_table; data->name; data++) {
		len = strlen(data->name);
		if (idname_len != len)
			continue;
		if (!strncasecmp(spec, data->name, len))
			break;
	}
	if (!data->name) {
		printf("sandbox_sf: unknown flash '%*s'\n", (int)idname_len,
		       spec);
		ret = -EINVAL;
		goto error;
	}

	if (sandbox_sf_0xff[0] == 0x00)
		memset(sandbox_sf_0xff, 0xff, sizeof(sandbox_sf_0xff));

	sbsf->fd = os_open(pdata->filename, 02);
	if (sbsf->fd == -1) {
		free(sbsf);
		printf("sandbox_sf: unable to open file '%s'\n",
		       pdata->filename);
		ret = -EIO;
		goto error;
	}

	sbsf->data = data;
	sbsf->cs = cs;

	return 0;

 error:
	return ret;
}

static int sandbox_sf_remove(struct udevice *dev)
{
	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);

	os_close(sbsf->fd);

	return 0;
}

static void sandbox_sf_cs_activate(struct udevice *dev)
{
	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);

	debug("sandbox_sf: CS activated; state is fresh!\n");

	/* CS is asserted, so reset state */
	sbsf->off = 0;
	sbsf->addr_bytes = 0;
	sbsf->pad_addr_bytes = 0;
	sbsf->state = SF_CMD;
	sbsf->cmd = SF_CMD;
}

static void sandbox_sf_cs_deactivate(struct udevice *dev)
{
	debug("sandbox_sf: CS deactivated; cmd done processing!\n");
}

/*
 * There are times when the data lines are allowed to tristate.  What
 * is actually sensed on the line depends on the hardware.  It could
 * always be 0xFF/0x00 (if there are pull ups/downs), or things could
 * float and so we'd get garbage back.  This func encapsulates that
 * scenario so we can worry about the details here.
 */
static void sandbox_spi_tristate(u8 *buf, uint len)
{
	/* XXX: make this into a user config option ? */
	memset(buf, 0xff, len);
}

/* Figure out what command this stream is telling us to do */
static int sandbox_sf_process_cmd(struct sandbox_spi_flash *sbsf, const u8 *rx,
				  u8 *tx)
{
	enum sandbox_sf_state oldstate = sbsf->state;

	/* We need to output a byte for the cmd byte we just ate */
	if (tx)
		sandbox_spi_tristate(tx, 1);

	sbsf->cmd = rx[0];
	switch (sbsf->cmd) {
	case CMD_READ_ID:
		sbsf->state = SF_ID;
		sbsf->cmd = SF_ID;
		break;
	case CMD_READ_ARRAY_FAST:
		sbsf->pad_addr_bytes = 1;
	case CMD_READ_ARRAY_SLOW:
	case CMD_PAGE_PROGRAM:
		sbsf->state = SF_ADDR;
		break;
	case CMD_WRITE_DISABLE:
		debug(" write disabled\n");
		sbsf->status &= ~STAT_WEL;
		break;
	case CMD_READ_STATUS:
		sbsf->state = SF_READ_STATUS;
		break;
	case CMD_READ_STATUS1:
		sbsf->state = SF_READ_STATUS1;
		break;
	case CMD_WRITE_ENABLE:
		debug(" write enabled\n");
		sbsf->status |= STAT_WEL;
		break;
	case CMD_WRITE_STATUS:
		sbsf->state = SF_WRITE_STATUS;
		break;
	default: {
		int flags = sbsf->data->flags;

		/* we only support erase here */
		if (sbsf->cmd == CMD_ERASE_CHIP) {
			sbsf->erase_size = sbsf->data->sector_size *
				sbsf->data->nr_sectors;
		} else if (sbsf->cmd == CMD_ERASE_4K && (flags & SECT_4K)) {
			sbsf->erase_size = 4 << 10;
		} else if (sbsf->cmd == CMD_ERASE_32K && (flags & SECT_32K)) {
			sbsf->erase_size = 32 << 10;
		} else if (sbsf->cmd == CMD_ERASE_64K &&
			   !(flags & (SECT_4K | SECT_32K))) {
			sbsf->erase_size = 64 << 10;
		} else {
			debug(" cmd unknown: %#x\n", sbsf->cmd);
			return -EIO;
		}
		sbsf->state = SF_ADDR;
		break;
	}
	}

	if (oldstate != sbsf->state)
		debug(" cmd: transition to %s state\n",
		      sandbox_sf_state_name(sbsf->state));

	return 0;
}

int sandbox_erase_part(struct sandbox_spi_flash *sbsf, int size)
{
	int todo;
	int ret;

	while (size > 0) {
		todo = min(size, sizeof(sandbox_sf_0xff));
		ret = os_write(sbsf->fd, sandbox_sf_0xff, todo);
		if (ret != todo)
			return ret;
		size -= todo;
	}

	return 0;
}

static int sandbox_sf_xfer(struct udevice *dev, unsigned int bitlen,
			   const void *rxp, void *txp, unsigned long flags)
{
	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
	const uint8_t *rx = rxp;
	uint8_t *tx = txp;
	uint cnt, pos = 0;
	int bytes = bitlen / 8;
	int ret;

	debug("sandbox_sf: state:%x(%s) bytes:%u\n", sbsf->state,
	      sandbox_sf_state_name(sbsf->state), bytes);

	if ((flags & SPI_XFER_BEGIN))
		sandbox_sf_cs_activate(dev);

	if (sbsf->state == SF_CMD) {
		/* Figure out the initial state */
		ret = sandbox_sf_process_cmd(sbsf, rx, tx);
		if (ret)
			return ret;
		++pos;
	}

	/* Process the remaining data */
	while (pos < bytes) {
		switch (sbsf->state) {
		case SF_ID: {
			u8 id;

			debug(" id: off:%u tx:", sbsf->off);
			if (sbsf->off < IDCODE_LEN) {
				/* Extract correct byte from ID 0x00aabbcc */
				id = sbsf->data->jedec >>
					(8 * (IDCODE_LEN - 1 - sbsf->off));
			} else {
				id = 0;
			}
			debug("%d %02x\n", sbsf->off, id);
			tx[pos++] = id;
			++sbsf->off;
			break;
		}
		case SF_ADDR:
			debug(" addr: bytes:%u rx:%02x ", sbsf->addr_bytes,
			      rx[pos]);

			if (sbsf->addr_bytes++ < SF_ADDR_LEN)
				sbsf->off = (sbsf->off << 8) | rx[pos];
			debug("addr:%06x\n", sbsf->off);

			if (tx)
				sandbox_spi_tristate(&tx[pos], 1);
			pos++;

			/* See if we're done processing */
			if (sbsf->addr_bytes <
					SF_ADDR_LEN + sbsf->pad_addr_bytes)
				break;

			/* Next state! */
			if (os_lseek(sbsf->fd, sbsf->off, OS_SEEK_SET) < 0) {
				puts("sandbox_sf: os_lseek() failed");
				return -EIO;
			}
			switch (sbsf->cmd) {
			case CMD_READ_ARRAY_FAST:
			case CMD_READ_ARRAY_SLOW:
				sbsf->state = SF_READ;
				break;
			case CMD_PAGE_PROGRAM:
				sbsf->state = SF_WRITE;
				break;
			default:
				/* assume erase state ... */
				sbsf->state = SF_ERASE;
				goto case_sf_erase;
			}
			debug(" cmd: transition to %s state\n",
			      sandbox_sf_state_name(sbsf->state));
			break;
		case SF_READ:
			/*
			 * XXX: need to handle exotic behavior:
			 *      - reading past end of device
			 */

			cnt = bytes - pos;
			debug(" tx: read(%u)\n", cnt);
			assert(tx);
			ret = os_read(sbsf->fd, tx + pos, cnt);
			if (ret < 0) {
				puts("sandbox_sf: os_read() failed\n");
				return -EIO;
			}
			pos += ret;
			break;
		case SF_READ_STATUS:
			debug(" read status: %#x\n", sbsf->status);
			cnt = bytes - pos;
			memset(tx + pos, sbsf->status, cnt);
			pos += cnt;
			break;
		case SF_READ_STATUS1:
			debug(" read status: %#x\n", sbsf->status);
			cnt = bytes - pos;
			memset(tx + pos, sbsf->status >> 8, cnt);
			pos += cnt;
			break;
		case SF_WRITE_STATUS:
			debug(" write status: %#x (ignored)\n", rx[pos]);
			pos = bytes;
			break;
		case SF_WRITE:
			/*
			 * XXX: need to handle exotic behavior:
			 *      - unaligned addresses
			 *      - more than a page (256) worth of data
			 *      - reading past end of device
			 */
			if (!(sbsf->status & STAT_WEL)) {
				puts("sandbox_sf: write enable not set before write\n");
				goto done;
			}

			cnt = bytes - pos;
			debug(" rx: write(%u)\n", cnt);
			if (tx)
				sandbox_spi_tristate(&tx[pos], cnt);
			ret = os_write(sbsf->fd, rx + pos, cnt);
			if (ret < 0) {
				puts("sandbox_spi: os_write() failed\n");
				return -EIO;
			}
			pos += ret;
			sbsf->status &= ~STAT_WEL;
			break;
		case SF_ERASE:
 case_sf_erase: {
			if (!(sbsf->status & STAT_WEL)) {
				puts("sandbox_sf: write enable not set before erase\n");
				goto done;
			}

			/* verify address is aligned */
			if (sbsf->off & (sbsf->erase_size - 1)) {
				debug(" sector erase: cmd:%#x needs align:%#x, but we got %#x\n",
				      sbsf->cmd, sbsf->erase_size,
				      sbsf->off);
				sbsf->status &= ~STAT_WEL;
				goto done;
			}

			debug(" sector erase addr: %u, size: %u\n", sbsf->off,
			      sbsf->erase_size);

			cnt = bytes - pos;
			if (tx)
				sandbox_spi_tristate(&tx[pos], cnt);
			pos += cnt;

			/*
			 * TODO(vapier@gentoo.org): latch WIP in status, and
			 * delay before clearing it ?
			 */
			ret = sandbox_erase_part(sbsf, sbsf->erase_size);
			sbsf->status &= ~STAT_WEL;
			if (ret) {
				debug("sandbox_sf: Erase failed\n");
				goto done;
			}
			goto done;
		}
		default:
			debug(" ??? no idea what to do ???\n");
			goto done;
		}
	}

 done:
	if (flags & SPI_XFER_END)
		sandbox_sf_cs_deactivate(dev);
	return pos == bytes ? 0 : -EIO;
}

int sandbox_sf_ofdata_to_platdata(struct udevice *dev)
{
	struct sandbox_spi_flash_plat_data *pdata = dev_get_platdata(dev);
	const void *blob = gd->fdt_blob;
	int node = dev->of_offset;

	pdata->filename = fdt_getprop(blob, node, "sandbox,filename", NULL);
	pdata->device_name = fdt_getprop(blob, node, "compatible", NULL);
	if (!pdata->filename || !pdata->device_name) {
		debug("%s: Missing properties, filename=%s, device_name=%s\n",
		      __func__, pdata->filename, pdata->device_name);
		return -EINVAL;
	}

	return 0;
}

static const struct dm_spi_emul_ops sandbox_sf_emul_ops = {
	.xfer          = sandbox_sf_xfer,
};

#ifdef CONFIG_SPI_FLASH
static int sandbox_cmdline_cb_spi_sf(struct sandbox_state *state,
				     const char *arg)
{
	unsigned long bus, cs;
	const char *spec = sandbox_spi_parse_spec(arg, &bus, &cs);

	if (!spec)
		return 1;

	/*
	 * It is safe to not make a copy of 'spec' because it comes from the
	 * command line.
	 *
	 * TODO(sjg@chromium.org): It would be nice if we could parse the
	 * spec here, but the problem is that no U-Boot init has been done
	 * yet. Perhaps we can figure something out.
	 */
	state->spi[bus][cs].spec = spec;
	return 0;
}
SANDBOX_CMDLINE_OPT(spi_sf, 1, "connect a SPI flash: <bus>:<cs>:<id>:<file>");

int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
			 struct udevice *bus, int of_offset, const char *spec)
{
	struct udevice *emul;
	char name[20], *str;
	struct driver *drv;
	int ret;

	/* now the emulator */
	strncpy(name, spec, sizeof(name) - 6);
	name[sizeof(name) - 6] = '\0';
	strcat(name, "-emul");
	str = strdup(name);
	if (!str)
		return -ENOMEM;
	drv = lists_driver_lookup_name("sandbox_sf_emul");
	if (!drv) {
		puts("Cannot find sandbox_sf_emul driver\n");
		return -ENOENT;
	}
	ret = device_bind(bus, drv, str, NULL, of_offset, &emul);
	if (ret) {
		printf("Cannot create emul device for spec '%s' (err=%d)\n",
		       spec, ret);
		return ret;
	}
	state->spi[busnum][cs].emul = emul;

	return 0;
}

void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs)
{
	state->spi[busnum][cs].emul = NULL;
}

static int sandbox_sf_bind_bus_cs(struct sandbox_state *state, int busnum,
				  int cs, const char *spec)
{
	struct udevice *bus, *slave;
	int ret;

	ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, true, &bus);
	if (ret) {
		printf("Invalid bus %d for spec '%s' (err=%d)\n", busnum,
		       spec, ret);
		return ret;
	}
	ret = device_find_child_by_seq(bus, cs, true, &slave);
	if (!ret) {
		printf("Chip select %d already exists for spec '%s'\n", cs,
		       spec);
		return -EEXIST;
	}

	ret = spi_bind_device(bus, cs, "spi_flash_std", spec, &slave);
	if (ret)
		return ret;

	return sandbox_sf_bind_emul(state, busnum, cs, bus, -1, spec);
}

int sandbox_spi_get_emul(struct sandbox_state *state,
			 struct udevice *bus, struct udevice *slave,
			 struct udevice **emulp)
{
	struct sandbox_spi_info *info;
	int busnum = bus->seq;
	int cs = spi_chip_select(slave);
	int ret;

	info = &state->spi[busnum][cs];
	if (!info->emul) {
		/* Use the same device tree node as the SPI flash device */
		debug("%s: busnum=%u, cs=%u: binding SPI flash emulation: ",
		      __func__, busnum, cs);
		ret = sandbox_sf_bind_emul(state, busnum, cs, bus,
					   slave->of_offset, slave->name);
		if (ret) {
			debug("failed (err=%d)\n", ret);
			return ret;
		}
		debug("OK\n");
	}
	*emulp = info->emul;

	return 0;
}

int dm_scan_other(bool pre_reloc_only)
{
	struct sandbox_state *state = state_get_current();
	int busnum, cs;

	if (pre_reloc_only)
		return 0;
	for (busnum = 0; busnum < CONFIG_SANDBOX_SPI_MAX_BUS; busnum++) {
		for (cs = 0; cs < CONFIG_SANDBOX_SPI_MAX_CS; cs++) {
			const char *spec = state->spi[busnum][cs].spec;
			int ret;

			if (spec) {
				ret = sandbox_sf_bind_bus_cs(state, busnum,
							     cs, spec);
				if (ret) {
					debug("%s: Bind failed for bus %d, cs %d\n",
					      __func__, busnum, cs);
					return ret;
				}
			}
		}
	}

	return 0;
}
#endif

static const struct udevice_id sandbox_sf_ids[] = {
	{ .compatible = "sandbox,spi-flash" },
	{ }
};

U_BOOT_DRIVER(sandbox_sf_emul) = {
	.name		= "sandbox_sf_emul",
	.id		= UCLASS_SPI_EMUL,
	.of_match	= sandbox_sf_ids,
	.ofdata_to_platdata = sandbox_sf_ofdata_to_platdata,
	.probe		= sandbox_sf_probe,
	.remove		= sandbox_sf_remove,
	.priv_auto_alloc_size = sizeof(struct sandbox_spi_flash),
	.platdata_auto_alloc_size = sizeof(struct sandbox_spi_flash_plat_data),
	.ops		= &sandbox_sf_emul_ops,
};