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12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/slab.h>
15#include <linux/delay.h>
16#include <linux/device.h>
17#include <linux/mutex.h>
18#include <linux/err.h>
19#include <linux/math64.h>
20
21#include <linux/spi/spi.h>
22#include <linux/spi/flash.h>
23
24#include <linux/mtd/mtd.h>
25#include <linux/mtd/partitions.h>
26
27
28
29
30
31
32
33
34
35
36
37
38
39#define OP_READ_CONTINUOUS 0xE8
40#define OP_READ_PAGE 0xD2
41
42
43#define OP_READ_STATUS 0xD7
44
45
46#define OP_READ_BUFFER1 0xD4
47#define OP_READ_BUFFER2 0xD6
48#define OP_WRITE_BUFFER1 0x84
49#define OP_WRITE_BUFFER2 0x87
50
51
52#define OP_ERASE_PAGE 0x81
53#define OP_ERASE_BLOCK 0x50
54
55
56#define OP_TRANSFER_BUF1 0x53
57#define OP_TRANSFER_BUF2 0x55
58#define OP_MREAD_BUFFER1 0xD4
59#define OP_MREAD_BUFFER2 0xD6
60#define OP_MWERASE_BUFFER1 0x83
61#define OP_MWERASE_BUFFER2 0x86
62#define OP_MWRITE_BUFFER1 0x88
63#define OP_MWRITE_BUFFER2 0x89
64
65
66#define OP_PROGRAM_VIA_BUF1 0x82
67#define OP_PROGRAM_VIA_BUF2 0x85
68
69
70#define OP_COMPARE_BUF1 0x60
71#define OP_COMPARE_BUF2 0x61
72
73
74#define OP_REWRITE_VIA_BUF1 0x58
75#define OP_REWRITE_VIA_BUF2 0x59
76
77
78
79
80#define OP_READ_ID 0x9F
81#define OP_READ_SECURITY 0x77
82#define OP_WRITE_SECURITY_REVC 0x9A
83#define OP_WRITE_SECURITY 0x9B
84
85
86struct dataflash {
87 uint8_t command[4];
88 char name[24];
89
90 unsigned partitioned:1;
91
92 unsigned short page_offset;
93 unsigned int page_size;
94
95 struct mutex lock;
96 struct spi_device *spi;
97
98 struct mtd_info mtd;
99};
100
101
102
103
104
105
106static inline int dataflash_status(struct spi_device *spi)
107{
108
109
110
111 return spi_w8r8(spi, OP_READ_STATUS);
112}
113
114
115
116
117
118static int dataflash_waitready(struct spi_device *spi)
119{
120 int status;
121
122 for (;;) {
123 status = dataflash_status(spi);
124 if (status < 0) {
125 DEBUG(MTD_DEBUG_LEVEL1, "%s: status %d?\n",
126 dev_name(&spi->dev), status);
127 status = 0;
128 }
129
130 if (status & (1 << 7))
131 return status;
132
133 msleep(3);
134 }
135}
136
137
138
139
140
141
142static int dataflash_erase(struct mtd_info *mtd, struct erase_info *instr)
143{
144 struct dataflash *priv = (struct dataflash *)mtd->priv;
145 struct spi_device *spi = priv->spi;
146 struct spi_transfer x = { .tx_dma = 0, };
147 struct spi_message msg;
148 unsigned blocksize = priv->page_size << 3;
149 uint8_t *command;
150 uint32_t rem;
151
152 DEBUG(MTD_DEBUG_LEVEL2, "%s: erase addr=0x%llx len 0x%llx\n",
153 dev_name(&spi->dev), (long long)instr->addr,
154 (long long)instr->len);
155
156
157 if (instr->addr + instr->len > mtd->size)
158 return -EINVAL;
159 div_u64_rem(instr->len, priv->page_size, &rem);
160 if (rem)
161 return -EINVAL;
162 div_u64_rem(instr->addr, priv->page_size, &rem);
163 if (rem)
164 return -EINVAL;
165
166 spi_message_init(&msg);
167
168 x.tx_buf = command = priv->command;
169 x.len = 4;
170 spi_message_add_tail(&x, &msg);
171
172 mutex_lock(&priv->lock);
173 while (instr->len > 0) {
174 unsigned int pageaddr;
175 int status;
176 int do_block;
177
178
179
180
181 pageaddr = div_u64(instr->addr, priv->page_size);
182 do_block = (pageaddr & 0x7) == 0 && instr->len >= blocksize;
183 pageaddr = pageaddr << priv->page_offset;
184
185 command[0] = do_block ? OP_ERASE_BLOCK : OP_ERASE_PAGE;
186 command[1] = (uint8_t)(pageaddr >> 16);
187 command[2] = (uint8_t)(pageaddr >> 8);
188 command[3] = 0;
189
190 DEBUG(MTD_DEBUG_LEVEL3, "ERASE %s: (%x) %x %x %x [%i]\n",
191 do_block ? "block" : "page",
192 command[0], command[1], command[2], command[3],
193 pageaddr);
194
195 status = spi_sync(spi, &msg);
196 (void) dataflash_waitready(spi);
197
198 if (status < 0) {
199 printk(KERN_ERR "%s: erase %x, err %d\n",
200 dev_name(&spi->dev), pageaddr, status);
201
202
203
204 continue;
205 }
206
207 if (do_block) {
208 instr->addr += blocksize;
209 instr->len -= blocksize;
210 } else {
211 instr->addr += priv->page_size;
212 instr->len -= priv->page_size;
213 }
214 }
215 mutex_unlock(&priv->lock);
216
217
218 instr->state = MTD_ERASE_DONE;
219 mtd_erase_callback(instr);
220
221 return 0;
222}
223
224
225
226
227
228
229
230
231static int dataflash_read(struct mtd_info *mtd, loff_t from, size_t len,
232 size_t *retlen, u_char *buf)
233{
234 struct dataflash *priv = (struct dataflash *)mtd->priv;
235 struct spi_transfer x[2] = { { .tx_dma = 0, }, };
236 struct spi_message msg;
237 unsigned int addr;
238 uint8_t *command;
239 int status;
240
241 DEBUG(MTD_DEBUG_LEVEL2, "%s: read 0x%x..0x%x\n",
242 dev_name(&priv->spi->dev), (unsigned)from, (unsigned)(from + len));
243
244 *retlen = 0;
245
246
247 if (!len)
248 return 0;
249 if (from + len > mtd->size)
250 return -EINVAL;
251
252
253 addr = (((unsigned)from / priv->page_size) << priv->page_offset)
254 + ((unsigned)from % priv->page_size);
255
256 command = priv->command;
257
258 DEBUG(MTD_DEBUG_LEVEL3, "READ: (%x) %x %x %x\n",
259 command[0], command[1], command[2], command[3]);
260
261 spi_message_init(&msg);
262
263 x[0].tx_buf = command;
264 x[0].len = 8;
265 spi_message_add_tail(&x[0], &msg);
266
267 x[1].rx_buf = buf;
268 x[1].len = len;
269 spi_message_add_tail(&x[1], &msg);
270
271 mutex_lock(&priv->lock);
272
273
274
275
276
277 command[0] = OP_READ_CONTINUOUS;
278 command[1] = (uint8_t)(addr >> 16);
279 command[2] = (uint8_t)(addr >> 8);
280 command[3] = (uint8_t)(addr >> 0);
281
282
283 status = spi_sync(priv->spi, &msg);
284 mutex_unlock(&priv->lock);
285
286 if (status >= 0) {
287 *retlen = msg.actual_length - 8;
288 status = 0;
289 } else
290 DEBUG(MTD_DEBUG_LEVEL1, "%s: read %x..%x --> %d\n",
291 dev_name(&priv->spi->dev),
292 (unsigned)from, (unsigned)(from + len),
293 status);
294 return status;
295}
296
297
298
299
300
301
302
303
304static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len,
305 size_t * retlen, const u_char * buf)
306{
307 struct dataflash *priv = (struct dataflash *)mtd->priv;
308 struct spi_device *spi = priv->spi;
309 struct spi_transfer x[2] = { { .tx_dma = 0, }, };
310 struct spi_message msg;
311 unsigned int pageaddr, addr, offset, writelen;
312 size_t remaining = len;
313 u_char *writebuf = (u_char *) buf;
314 int status = -EINVAL;
315 uint8_t *command;
316
317 DEBUG(MTD_DEBUG_LEVEL2, "%s: write 0x%x..0x%x\n",
318 dev_name(&spi->dev), (unsigned)to, (unsigned)(to + len));
319
320 *retlen = 0;
321
322
323 if (!len)
324 return 0;
325 if ((to + len) > mtd->size)
326 return -EINVAL;
327
328 spi_message_init(&msg);
329
330 x[0].tx_buf = command = priv->command;
331 x[0].len = 4;
332 spi_message_add_tail(&x[0], &msg);
333
334 pageaddr = ((unsigned)to / priv->page_size);
335 offset = ((unsigned)to % priv->page_size);
336 if (offset + len > priv->page_size)
337 writelen = priv->page_size - offset;
338 else
339 writelen = len;
340
341 mutex_lock(&priv->lock);
342 while (remaining > 0) {
343 DEBUG(MTD_DEBUG_LEVEL3, "write @ %i:%i len=%i\n",
344 pageaddr, offset, writelen);
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362 addr = pageaddr << priv->page_offset;
363
364
365 if (writelen != priv->page_size) {
366 command[0] = OP_TRANSFER_BUF1;
367 command[1] = (addr & 0x00FF0000) >> 16;
368 command[2] = (addr & 0x0000FF00) >> 8;
369 command[3] = 0;
370
371 DEBUG(MTD_DEBUG_LEVEL3, "TRANSFER: (%x) %x %x %x\n",
372 command[0], command[1], command[2], command[3]);
373
374 status = spi_sync(spi, &msg);
375 if (status < 0)
376 DEBUG(MTD_DEBUG_LEVEL1, "%s: xfer %u -> %d \n",
377 dev_name(&spi->dev), addr, status);
378
379 (void) dataflash_waitready(priv->spi);
380 }
381
382
383 addr += offset;
384 command[0] = OP_PROGRAM_VIA_BUF1;
385 command[1] = (addr & 0x00FF0000) >> 16;
386 command[2] = (addr & 0x0000FF00) >> 8;
387 command[3] = (addr & 0x000000FF);
388
389 DEBUG(MTD_DEBUG_LEVEL3, "PROGRAM: (%x) %x %x %x\n",
390 command[0], command[1], command[2], command[3]);
391
392 x[1].tx_buf = writebuf;
393 x[1].len = writelen;
394 spi_message_add_tail(x + 1, &msg);
395 status = spi_sync(spi, &msg);
396 spi_transfer_del(x + 1);
397 if (status < 0)
398 DEBUG(MTD_DEBUG_LEVEL1, "%s: pgm %u/%u -> %d \n",
399 dev_name(&spi->dev), addr, writelen, status);
400
401 (void) dataflash_waitready(priv->spi);
402
403
404#ifdef CONFIG_MTD_DATAFLASH_WRITE_VERIFY
405
406
407 addr = pageaddr << priv->page_offset;
408 command[0] = OP_COMPARE_BUF1;
409 command[1] = (addr & 0x00FF0000) >> 16;
410 command[2] = (addr & 0x0000FF00) >> 8;
411 command[3] = 0;
412
413 DEBUG(MTD_DEBUG_LEVEL3, "COMPARE: (%x) %x %x %x\n",
414 command[0], command[1], command[2], command[3]);
415
416 status = spi_sync(spi, &msg);
417 if (status < 0)
418 DEBUG(MTD_DEBUG_LEVEL1, "%s: compare %u -> %d \n",
419 dev_name(&spi->dev), addr, status);
420
421 status = dataflash_waitready(priv->spi);
422
423
424 if (status & (1 << 6)) {
425 printk(KERN_ERR "%s: compare page %u, err %d\n",
426 dev_name(&spi->dev), pageaddr, status);
427 remaining = 0;
428 status = -EIO;
429 break;
430 } else
431 status = 0;
432
433#endif
434
435 remaining = remaining - writelen;
436 pageaddr++;
437 offset = 0;
438 writebuf += writelen;
439 *retlen += writelen;
440
441 if (remaining > priv->page_size)
442 writelen = priv->page_size;
443 else
444 writelen = remaining;
445 }
446 mutex_unlock(&priv->lock);
447
448 return status;
449}
450
451
452
453#ifdef CONFIG_MTD_DATAFLASH_OTP
454
455static int dataflash_get_otp_info(struct mtd_info *mtd,
456 struct otp_info *info, size_t len)
457{
458
459
460
461
462 info->start = 0;
463 info->length = 64;
464 info->locked = 1;
465 return sizeof(*info);
466}
467
468static ssize_t otp_read(struct spi_device *spi, unsigned base,
469 uint8_t *buf, loff_t off, size_t len)
470{
471 struct spi_message m;
472 size_t l;
473 uint8_t *scratch;
474 struct spi_transfer t;
475 int status;
476
477 if (off > 64)
478 return -EINVAL;
479
480 if ((off + len) > 64)
481 len = 64 - off;
482 if (len == 0)
483 return len;
484
485 spi_message_init(&m);
486
487 l = 4 + base + off + len;
488 scratch = kzalloc(l, GFP_KERNEL);
489 if (!scratch)
490 return -ENOMEM;
491
492
493
494
495 scratch[0] = OP_READ_SECURITY;
496
497 memset(&t, 0, sizeof t);
498 t.tx_buf = scratch;
499 t.rx_buf = scratch;
500 t.len = l;
501 spi_message_add_tail(&t, &m);
502
503 dataflash_waitready(spi);
504
505 status = spi_sync(spi, &m);
506 if (status >= 0) {
507 memcpy(buf, scratch + 4 + base + off, len);
508 status = len;
509 }
510
511 kfree(scratch);
512 return status;
513}
514
515static int dataflash_read_fact_otp(struct mtd_info *mtd,
516 loff_t from, size_t len, size_t *retlen, u_char *buf)
517{
518 struct dataflash *priv = (struct dataflash *)mtd->priv;
519 int status;
520
521
522 mutex_lock(&priv->lock);
523 status = otp_read(priv->spi, 64, buf, from, len);
524 mutex_unlock(&priv->lock);
525
526 if (status < 0)
527 return status;
528 *retlen = status;
529 return 0;
530}
531
532static int dataflash_read_user_otp(struct mtd_info *mtd,
533 loff_t from, size_t len, size_t *retlen, u_char *buf)
534{
535 struct dataflash *priv = (struct dataflash *)mtd->priv;
536 int status;
537
538
539 mutex_lock(&priv->lock);
540 status = otp_read(priv->spi, 0, buf, from, len);
541 mutex_unlock(&priv->lock);
542
543 if (status < 0)
544 return status;
545 *retlen = status;
546 return 0;
547}
548
549static int dataflash_write_user_otp(struct mtd_info *mtd,
550 loff_t from, size_t len, size_t *retlen, u_char *buf)
551{
552 struct spi_message m;
553 const size_t l = 4 + 64;
554 uint8_t *scratch;
555 struct spi_transfer t;
556 struct dataflash *priv = (struct dataflash *)mtd->priv;
557 int status;
558
559 if (len > 64)
560 return -EINVAL;
561
562
563
564
565 if ((from + len) > 64)
566 return -EINVAL;
567
568
569
570
571 scratch = kzalloc(l, GFP_KERNEL);
572 if (!scratch)
573 return -ENOMEM;
574 scratch[0] = OP_WRITE_SECURITY;
575 memcpy(scratch + 4 + from, buf, len);
576
577 spi_message_init(&m);
578
579 memset(&t, 0, sizeof t);
580 t.tx_buf = scratch;
581 t.len = l;
582 spi_message_add_tail(&t, &m);
583
584
585
586
587 mutex_lock(&priv->lock);
588 dataflash_waitready(priv->spi);
589 status = spi_sync(priv->spi, &m);
590 mutex_unlock(&priv->lock);
591
592 kfree(scratch);
593
594 if (status >= 0) {
595 status = 0;
596 *retlen = len;
597 }
598 return status;
599}
600
601static char *otp_setup(struct mtd_info *device, char revision)
602{
603 device->get_fact_prot_info = dataflash_get_otp_info;
604 device->read_fact_prot_reg = dataflash_read_fact_otp;
605 device->get_user_prot_info = dataflash_get_otp_info;
606 device->read_user_prot_reg = dataflash_read_user_otp;
607
608
609
610
611 if (revision > 'c')
612 device->write_user_prot_reg = dataflash_write_user_otp;
613
614 return ", OTP";
615}
616
617#else
618
619static char *otp_setup(struct mtd_info *device, char revision)
620{
621 return " (OTP)";
622}
623
624#endif
625
626
627
628
629
630
631static int __devinit
632add_dataflash_otp(struct spi_device *spi, char *name,
633 int nr_pages, int pagesize, int pageoffset, char revision)
634{
635 struct dataflash *priv;
636 struct mtd_info *device;
637 struct flash_platform_data *pdata = spi->dev.platform_data;
638 char *otp_tag = "";
639
640 priv = kzalloc(sizeof *priv, GFP_KERNEL);
641 if (!priv)
642 return -ENOMEM;
643
644 mutex_init(&priv->lock);
645 priv->spi = spi;
646 priv->page_size = pagesize;
647 priv->page_offset = pageoffset;
648
649
650 sprintf(priv->name, "spi%d.%d-%s",
651 spi->master->bus_num, spi->chip_select,
652 name);
653
654 device = &priv->mtd;
655 device->name = (pdata && pdata->name) ? pdata->name : priv->name;
656 device->size = nr_pages * pagesize;
657 device->erasesize = pagesize;
658 device->writesize = pagesize;
659 device->owner = THIS_MODULE;
660 device->type = MTD_DATAFLASH;
661 device->flags = MTD_WRITEABLE;
662 device->erase = dataflash_erase;
663 device->read = dataflash_read;
664 device->write = dataflash_write;
665 device->priv = priv;
666
667 device->dev.parent = &spi->dev;
668
669 if (revision >= 'c')
670 otp_tag = otp_setup(device, revision);
671
672 dev_info(&spi->dev, "%s (%lld KBytes) pagesize %d bytes%s\n",
673 name, (long long)((device->size + 1023) >> 10),
674 pagesize, otp_tag);
675 dev_set_drvdata(&spi->dev, priv);
676
677 if (mtd_has_partitions()) {
678 struct mtd_partition *parts;
679 int nr_parts = 0;
680
681 if (mtd_has_cmdlinepart()) {
682 static const char *part_probes[]
683 = { "cmdlinepart", NULL, };
684
685 nr_parts = parse_mtd_partitions(device,
686 part_probes, &parts, 0);
687 }
688
689 if (nr_parts <= 0 && pdata && pdata->parts) {
690 parts = pdata->parts;
691 nr_parts = pdata->nr_parts;
692 }
693
694 if (nr_parts > 0) {
695 priv->partitioned = 1;
696 return add_mtd_partitions(device, parts, nr_parts);
697 }
698 } else if (pdata && pdata->nr_parts)
699 dev_warn(&spi->dev, "ignoring %d default partitions on %s\n",
700 pdata->nr_parts, device->name);
701
702 return add_mtd_device(device) == 1 ? -ENODEV : 0;
703}
704
705static inline int __devinit
706add_dataflash(struct spi_device *spi, char *name,
707 int nr_pages, int pagesize, int pageoffset)
708{
709 return add_dataflash_otp(spi, name, nr_pages, pagesize,
710 pageoffset, 0);
711}
712
713struct flash_info {
714 char *name;
715
716
717
718
719 uint32_t jedec_id;
720
721
722 unsigned nr_pages;
723 uint16_t pagesize;
724 uint16_t pageoffset;
725
726 uint16_t flags;
727#define SUP_POW2PS 0x0002
728#define IS_POW2PS 0x0001
729};
730
731static struct flash_info __devinitdata dataflash_data [] = {
732
733
734
735
736
737
738
739
740
741
742 { "AT45DB011B", 0x1f2200, 512, 264, 9, SUP_POW2PS},
743 { "at45db011d", 0x1f2200, 512, 256, 8, SUP_POW2PS | IS_POW2PS},
744
745 { "AT45DB021B", 0x1f2300, 1024, 264, 9, SUP_POW2PS},
746 { "at45db021d", 0x1f2300, 1024, 256, 8, SUP_POW2PS | IS_POW2PS},
747
748 { "AT45DB041x", 0x1f2400, 2048, 264, 9, SUP_POW2PS},
749 { "at45db041d", 0x1f2400, 2048, 256, 8, SUP_POW2PS | IS_POW2PS},
750
751 { "AT45DB081B", 0x1f2500, 4096, 264, 9, SUP_POW2PS},
752 { "at45db081d", 0x1f2500, 4096, 256, 8, SUP_POW2PS | IS_POW2PS},
753
754 { "AT45DB161x", 0x1f2600, 4096, 528, 10, SUP_POW2PS},
755 { "at45db161d", 0x1f2600, 4096, 512, 9, SUP_POW2PS | IS_POW2PS},
756
757 { "AT45DB321x", 0x1f2700, 8192, 528, 10, 0},
758
759 { "AT45DB321x", 0x1f2701, 8192, 528, 10, SUP_POW2PS},
760 { "at45db321d", 0x1f2701, 8192, 512, 9, SUP_POW2PS | IS_POW2PS},
761
762 { "AT45DB642x", 0x1f2800, 8192, 1056, 11, SUP_POW2PS},
763 { "at45db642d", 0x1f2800, 8192, 1024, 10, SUP_POW2PS | IS_POW2PS},
764};
765
766static struct flash_info *__devinit jedec_probe(struct spi_device *spi)
767{
768 int tmp;
769 uint8_t code = OP_READ_ID;
770 uint8_t id[3];
771 uint32_t jedec;
772 struct flash_info *info;
773 int status;
774
775
776
777
778
779
780
781
782
783 tmp = spi_write_then_read(spi, &code, 1, id, 3);
784 if (tmp < 0) {
785 DEBUG(MTD_DEBUG_LEVEL0, "%s: error %d reading JEDEC ID\n",
786 dev_name(&spi->dev), tmp);
787 return ERR_PTR(tmp);
788 }
789 if (id[0] != 0x1f)
790 return NULL;
791
792 jedec = id[0];
793 jedec = jedec << 8;
794 jedec |= id[1];
795 jedec = jedec << 8;
796 jedec |= id[2];
797
798 for (tmp = 0, info = dataflash_data;
799 tmp < ARRAY_SIZE(dataflash_data);
800 tmp++, info++) {
801 if (info->jedec_id == jedec) {
802 DEBUG(MTD_DEBUG_LEVEL1, "%s: OTP, sector protect%s\n",
803 dev_name(&spi->dev),
804 (info->flags & SUP_POW2PS)
805 ? ", binary pagesize" : ""
806 );
807 if (info->flags & SUP_POW2PS) {
808 status = dataflash_status(spi);
809 if (status < 0) {
810 DEBUG(MTD_DEBUG_LEVEL1,
811 "%s: status error %d\n",
812 dev_name(&spi->dev), status);
813 return ERR_PTR(status);
814 }
815 if (status & 0x1) {
816 if (info->flags & IS_POW2PS)
817 return info;
818 } else {
819 if (!(info->flags & IS_POW2PS))
820 return info;
821 }
822 } else
823 return info;
824 }
825 }
826
827
828
829
830
831
832 dev_warn(&spi->dev, "JEDEC id %06x not handled\n", jedec);
833 return ERR_PTR(-ENODEV);
834}
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850static int __devinit dataflash_probe(struct spi_device *spi)
851{
852 int status;
853 struct flash_info *info;
854
855
856
857
858
859
860
861
862 info = jedec_probe(spi);
863 if (IS_ERR(info))
864 return PTR_ERR(info);
865 if (info != NULL)
866 return add_dataflash_otp(spi, info->name, info->nr_pages,
867 info->pagesize, info->pageoffset,
868 (info->flags & SUP_POW2PS) ? 'd' : 'c');
869
870
871
872
873
874 status = dataflash_status(spi);
875 if (status <= 0 || status == 0xff) {
876 DEBUG(MTD_DEBUG_LEVEL1, "%s: status error %d\n",
877 dev_name(&spi->dev), status);
878 if (status == 0 || status == 0xff)
879 status = -ENODEV;
880 return status;
881 }
882
883
884
885
886
887 switch (status & 0x3c) {
888 case 0x0c:
889 status = add_dataflash(spi, "AT45DB011B", 512, 264, 9);
890 break;
891 case 0x14:
892 status = add_dataflash(spi, "AT45DB021B", 1024, 264, 9);
893 break;
894 case 0x1c:
895 status = add_dataflash(spi, "AT45DB041x", 2048, 264, 9);
896 break;
897 case 0x24:
898 status = add_dataflash(spi, "AT45DB081B", 4096, 264, 9);
899 break;
900 case 0x2c:
901 status = add_dataflash(spi, "AT45DB161x", 4096, 528, 10);
902 break;
903 case 0x34:
904 status = add_dataflash(spi, "AT45DB321x", 8192, 528, 10);
905 break;
906 case 0x38:
907 case 0x3c:
908 status = add_dataflash(spi, "AT45DB642x", 8192, 1056, 11);
909 break;
910
911 default:
912 DEBUG(MTD_DEBUG_LEVEL1, "%s: unsupported device (%x)\n",
913 dev_name(&spi->dev), status & 0x3c);
914 status = -ENODEV;
915 }
916
917 if (status < 0)
918 DEBUG(MTD_DEBUG_LEVEL1, "%s: add_dataflash --> %d\n",
919 dev_name(&spi->dev), status);
920
921 return status;
922}
923
924static int __devexit dataflash_remove(struct spi_device *spi)
925{
926 struct dataflash *flash = dev_get_drvdata(&spi->dev);
927 int status;
928
929 DEBUG(MTD_DEBUG_LEVEL1, "%s: remove\n", dev_name(&spi->dev));
930
931 if (mtd_has_partitions() && flash->partitioned)
932 status = del_mtd_partitions(&flash->mtd);
933 else
934 status = del_mtd_device(&flash->mtd);
935 if (status == 0)
936 kfree(flash);
937 return status;
938}
939
940static struct spi_driver dataflash_driver = {
941 .driver = {
942 .name = "mtd_dataflash",
943 .bus = &spi_bus_type,
944 .owner = THIS_MODULE,
945 },
946
947 .probe = dataflash_probe,
948 .remove = __devexit_p(dataflash_remove),
949
950
951};
952
953static int __init dataflash_init(void)
954{
955 return spi_register_driver(&dataflash_driver);
956}
957module_init(dataflash_init);
958
959static void __exit dataflash_exit(void)
960{
961 spi_unregister_driver(&dataflash_driver);
962}
963module_exit(dataflash_exit);
964
965
966MODULE_LICENSE("GPL");
967MODULE_AUTHOR("Andrew Victor, David Brownell");
968MODULE_DESCRIPTION("MTD DataFlash driver");
969MODULE_ALIAS("spi:mtd_dataflash");
970