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34#include <linux/module.h>
35#include <linux/slab.h>
36
37#include <scsi/scsi.h>
38#include <scsi/scsi_cmnd.h>
39#include <scsi/scsi_device.h>
40
41#include "usb.h"
42#include "transport.h"
43#include "protocol.h"
44#include "debug.h"
45
46MODULE_DESCRIPTION("Driver for Alauda-based card readers");
47MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>");
48MODULE_LICENSE("GPL");
49
50
51
52
53#define ALAUDA_STATUS_ERROR 0x01
54#define ALAUDA_STATUS_READY 0x40
55
56
57
58
59#define ALAUDA_GET_XD_MEDIA_STATUS 0x08
60#define ALAUDA_GET_SM_MEDIA_STATUS 0x98
61#define ALAUDA_ACK_XD_MEDIA_CHANGE 0x0a
62#define ALAUDA_ACK_SM_MEDIA_CHANGE 0x9a
63#define ALAUDA_GET_XD_MEDIA_SIG 0x86
64#define ALAUDA_GET_SM_MEDIA_SIG 0x96
65
66
67
68
69#define ALAUDA_BULK_CMD 0x40
70
71
72
73
74#define ALAUDA_BULK_GET_REDU_DATA 0x85
75#define ALAUDA_BULK_READ_BLOCK 0x94
76#define ALAUDA_BULK_ERASE_BLOCK 0xa3
77#define ALAUDA_BULK_WRITE_BLOCK 0xb4
78#define ALAUDA_BULK_GET_STATUS2 0xb7
79#define ALAUDA_BULK_RESET_MEDIA 0xe0
80
81
82
83
84#define ALAUDA_PORT_XD 0x00
85#define ALAUDA_PORT_SM 0x01
86
87
88
89
90#define UNDEF 0xffff
91#define SPARE 0xfffe
92#define UNUSABLE 0xfffd
93
94struct alauda_media_info {
95 unsigned long capacity;
96 unsigned int pagesize;
97 unsigned int blocksize;
98 unsigned int uzonesize;
99 unsigned int zonesize;
100 unsigned int blockmask;
101
102 unsigned char pageshift;
103 unsigned char blockshift;
104 unsigned char zoneshift;
105
106 u16 **lba_to_pba;
107 u16 **pba_to_lba;
108};
109
110struct alauda_info {
111 struct alauda_media_info port[2];
112 int wr_ep;
113
114 unsigned char sense_key;
115 unsigned long sense_asc;
116 unsigned long sense_ascq;
117};
118
119#define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
120#define LSB_of(s) ((s)&0xFF)
121#define MSB_of(s) ((s)>>8)
122
123#define MEDIA_PORT(us) us->srb->device->lun
124#define MEDIA_INFO(us) ((struct alauda_info *)us->extra)->port[MEDIA_PORT(us)]
125
126#define PBA_LO(pba) ((pba & 0xF) << 5)
127#define PBA_HI(pba) (pba >> 3)
128#define PBA_ZONE(pba) (pba >> 11)
129
130static int init_alauda(struct us_data *us);
131
132
133
134
135
136#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
137 vendorName, productName, useProtocol, useTransport, \
138 initFunction, flags) \
139{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
140 .driver_info = (flags) }
141
142static struct usb_device_id alauda_usb_ids[] = {
143# include "unusual_alauda.h"
144 { }
145};
146MODULE_DEVICE_TABLE(usb, alauda_usb_ids);
147
148#undef UNUSUAL_DEV
149
150
151
152
153#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
154 vendor_name, product_name, use_protocol, use_transport, \
155 init_function, Flags) \
156{ \
157 .vendorName = vendor_name, \
158 .productName = product_name, \
159 .useProtocol = use_protocol, \
160 .useTransport = use_transport, \
161 .initFunction = init_function, \
162}
163
164static struct us_unusual_dev alauda_unusual_dev_list[] = {
165# include "unusual_alauda.h"
166 { }
167};
168
169#undef UNUSUAL_DEV
170
171
172
173
174
175
176struct alauda_card_info {
177 unsigned char id;
178 unsigned char chipshift;
179 unsigned char pageshift;
180 unsigned char blockshift;
181 unsigned char zoneshift;
182};
183
184static struct alauda_card_info alauda_card_ids[] = {
185
186 { 0x6e, 20, 8, 4, 8},
187 { 0xe8, 20, 8, 4, 8},
188 { 0xec, 20, 8, 4, 8},
189 { 0x64, 21, 8, 4, 9},
190 { 0xea, 21, 8, 4, 9},
191 { 0x6b, 22, 9, 4, 9},
192 { 0xe3, 22, 9, 4, 9},
193 { 0xe5, 22, 9, 4, 9},
194 { 0xe6, 23, 9, 4, 10},
195 { 0x73, 24, 9, 5, 10},
196 { 0x75, 25, 9, 5, 10},
197 { 0x76, 26, 9, 5, 10},
198 { 0x79, 27, 9, 5, 10},
199 { 0x71, 28, 9, 5, 10},
200
201
202 { 0x5d, 21, 9, 4, 8},
203 { 0xd5, 22, 9, 4, 9},
204 { 0xd6, 23, 9, 4, 10},
205 { 0x57, 24, 9, 4, 11},
206 { 0x58, 25, 9, 4, 12},
207 { 0,}
208};
209
210static struct alauda_card_info *alauda_card_find_id(unsigned char id) {
211 int i;
212
213 for (i = 0; alauda_card_ids[i].id != 0; i++)
214 if (alauda_card_ids[i].id == id)
215 return &(alauda_card_ids[i]);
216 return NULL;
217}
218
219
220
221
222
223static unsigned char parity[256];
224static unsigned char ecc2[256];
225
226static void nand_init_ecc(void) {
227 int i, j, a;
228
229 parity[0] = 0;
230 for (i = 1; i < 256; i++)
231 parity[i] = (parity[i&(i-1)] ^ 1);
232
233 for (i = 0; i < 256; i++) {
234 a = 0;
235 for (j = 0; j < 8; j++) {
236 if (i & (1<<j)) {
237 if ((j & 1) == 0)
238 a ^= 0x04;
239 if ((j & 2) == 0)
240 a ^= 0x10;
241 if ((j & 4) == 0)
242 a ^= 0x40;
243 }
244 }
245 ecc2[i] = ~(a ^ (a<<1) ^ (parity[i] ? 0xa8 : 0));
246 }
247}
248
249
250static void nand_compute_ecc(unsigned char *data, unsigned char *ecc) {
251 int i, j, a;
252 unsigned char par = 0, bit, bits[8] = {0};
253
254
255 for (i = 0; i < 256; i++) {
256 par ^= data[i];
257 bit = parity[data[i]];
258 for (j = 0; j < 8; j++)
259 if ((i & (1<<j)) == 0)
260 bits[j] ^= bit;
261 }
262
263
264 a = (bits[3] << 6) + (bits[2] << 4) + (bits[1] << 2) + bits[0];
265 ecc[0] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0));
266
267 a = (bits[7] << 6) + (bits[6] << 4) + (bits[5] << 2) + bits[4];
268 ecc[1] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0));
269
270 ecc[2] = ecc2[par];
271}
272
273static int nand_compare_ecc(unsigned char *data, unsigned char *ecc) {
274 return (data[0] == ecc[0] && data[1] == ecc[1] && data[2] == ecc[2]);
275}
276
277static void nand_store_ecc(unsigned char *data, unsigned char *ecc) {
278 memcpy(data, ecc, 3);
279}
280
281
282
283
284
285
286
287
288static void alauda_free_maps (struct alauda_media_info *media_info)
289{
290 unsigned int shift = media_info->zoneshift
291 + media_info->blockshift + media_info->pageshift;
292 unsigned int num_zones = media_info->capacity >> shift;
293 unsigned int i;
294
295 if (media_info->lba_to_pba != NULL)
296 for (i = 0; i < num_zones; i++) {
297 kfree(media_info->lba_to_pba[i]);
298 media_info->lba_to_pba[i] = NULL;
299 }
300
301 if (media_info->pba_to_lba != NULL)
302 for (i = 0; i < num_zones; i++) {
303 kfree(media_info->pba_to_lba[i]);
304 media_info->pba_to_lba[i] = NULL;
305 }
306}
307
308
309
310
311
312static int alauda_get_media_status(struct us_data *us, unsigned char *data)
313{
314 int rc;
315 unsigned char command;
316
317 if (MEDIA_PORT(us) == ALAUDA_PORT_XD)
318 command = ALAUDA_GET_XD_MEDIA_STATUS;
319 else
320 command = ALAUDA_GET_SM_MEDIA_STATUS;
321
322 rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
323 command, 0xc0, 0, 1, data, 2);
324
325 usb_stor_dbg(us, "Media status %02X %02X\n", data[0], data[1]);
326
327 return rc;
328}
329
330
331
332
333
334static int alauda_ack_media(struct us_data *us)
335{
336 unsigned char command;
337
338 if (MEDIA_PORT(us) == ALAUDA_PORT_XD)
339 command = ALAUDA_ACK_XD_MEDIA_CHANGE;
340 else
341 command = ALAUDA_ACK_SM_MEDIA_CHANGE;
342
343 return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
344 command, 0x40, 0, 1, NULL, 0);
345}
346
347
348
349
350
351static int alauda_get_media_signature(struct us_data *us, unsigned char *data)
352{
353 unsigned char command;
354
355 if (MEDIA_PORT(us) == ALAUDA_PORT_XD)
356 command = ALAUDA_GET_XD_MEDIA_SIG;
357 else
358 command = ALAUDA_GET_SM_MEDIA_SIG;
359
360 return usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
361 command, 0xc0, 0, 0, data, 4);
362}
363
364
365
366
367static int alauda_reset_media(struct us_data *us)
368{
369 unsigned char *command = us->iobuf;
370
371 memset(command, 0, 9);
372 command[0] = ALAUDA_BULK_CMD;
373 command[1] = ALAUDA_BULK_RESET_MEDIA;
374 command[8] = MEDIA_PORT(us);
375
376 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
377 command, 9, NULL);
378}
379
380
381
382
383static int alauda_init_media(struct us_data *us)
384{
385 unsigned char *data = us->iobuf;
386 int ready = 0;
387 struct alauda_card_info *media_info;
388 unsigned int num_zones;
389
390 while (ready == 0) {
391 msleep(20);
392
393 if (alauda_get_media_status(us, data) != USB_STOR_XFER_GOOD)
394 return USB_STOR_TRANSPORT_ERROR;
395
396 if (data[0] & 0x10)
397 ready = 1;
398 }
399
400 usb_stor_dbg(us, "We are ready for action!\n");
401
402 if (alauda_ack_media(us) != USB_STOR_XFER_GOOD)
403 return USB_STOR_TRANSPORT_ERROR;
404
405 msleep(10);
406
407 if (alauda_get_media_status(us, data) != USB_STOR_XFER_GOOD)
408 return USB_STOR_TRANSPORT_ERROR;
409
410 if (data[0] != 0x14) {
411 usb_stor_dbg(us, "Media not ready after ack\n");
412 return USB_STOR_TRANSPORT_ERROR;
413 }
414
415 if (alauda_get_media_signature(us, data) != USB_STOR_XFER_GOOD)
416 return USB_STOR_TRANSPORT_ERROR;
417
418 usb_stor_dbg(us, "Media signature: %4ph\n", data);
419 media_info = alauda_card_find_id(data[1]);
420 if (media_info == NULL) {
421 pr_warn("alauda_init_media: Unrecognised media signature: %4ph\n",
422 data);
423 return USB_STOR_TRANSPORT_ERROR;
424 }
425
426 MEDIA_INFO(us).capacity = 1 << media_info->chipshift;
427 usb_stor_dbg(us, "Found media with capacity: %ldMB\n",
428 MEDIA_INFO(us).capacity >> 20);
429
430 MEDIA_INFO(us).pageshift = media_info->pageshift;
431 MEDIA_INFO(us).blockshift = media_info->blockshift;
432 MEDIA_INFO(us).zoneshift = media_info->zoneshift;
433
434 MEDIA_INFO(us).pagesize = 1 << media_info->pageshift;
435 MEDIA_INFO(us).blocksize = 1 << media_info->blockshift;
436 MEDIA_INFO(us).zonesize = 1 << media_info->zoneshift;
437
438 MEDIA_INFO(us).uzonesize = ((1 << media_info->zoneshift) / 128) * 125;
439 MEDIA_INFO(us).blockmask = MEDIA_INFO(us).blocksize - 1;
440
441 num_zones = MEDIA_INFO(us).capacity >> (MEDIA_INFO(us).zoneshift
442 + MEDIA_INFO(us).blockshift + MEDIA_INFO(us).pageshift);
443 MEDIA_INFO(us).pba_to_lba = kcalloc(num_zones, sizeof(u16*), GFP_NOIO);
444 MEDIA_INFO(us).lba_to_pba = kcalloc(num_zones, sizeof(u16*), GFP_NOIO);
445
446 if (alauda_reset_media(us) != USB_STOR_XFER_GOOD)
447 return USB_STOR_TRANSPORT_ERROR;
448
449 return USB_STOR_TRANSPORT_GOOD;
450}
451
452
453
454
455
456static int alauda_check_media(struct us_data *us)
457{
458 struct alauda_info *info = (struct alauda_info *) us->extra;
459 unsigned char status[2];
460 int rc;
461
462 rc = alauda_get_media_status(us, status);
463
464
465 if ((status[0] & 0x80) || ((status[0] & 0x1F) == 0x10)
466 || ((status[1] & 0x01) == 0)) {
467 usb_stor_dbg(us, "No media, or door open\n");
468 alauda_free_maps(&MEDIA_INFO(us));
469 info->sense_key = 0x02;
470 info->sense_asc = 0x3A;
471 info->sense_ascq = 0x00;
472 return USB_STOR_TRANSPORT_FAILED;
473 }
474
475
476 if (status[0] & 0x08) {
477 usb_stor_dbg(us, "Media change detected\n");
478 alauda_free_maps(&MEDIA_INFO(us));
479 alauda_init_media(us);
480
481 info->sense_key = UNIT_ATTENTION;
482 info->sense_asc = 0x28;
483 info->sense_ascq = 0x00;
484 return USB_STOR_TRANSPORT_FAILED;
485 }
486
487 return USB_STOR_TRANSPORT_GOOD;
488}
489
490
491
492
493
494static int alauda_check_status2(struct us_data *us)
495{
496 int rc;
497 unsigned char command[] = {
498 ALAUDA_BULK_CMD, ALAUDA_BULK_GET_STATUS2,
499 0, 0, 0, 0, 3, 0, MEDIA_PORT(us)
500 };
501 unsigned char data[3];
502
503 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
504 command, 9, NULL);
505 if (rc != USB_STOR_XFER_GOOD)
506 return rc;
507
508 rc = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
509 data, 3, NULL);
510 if (rc != USB_STOR_XFER_GOOD)
511 return rc;
512
513 usb_stor_dbg(us, "%3ph\n", data);
514 if (data[0] & ALAUDA_STATUS_ERROR)
515 return USB_STOR_XFER_ERROR;
516
517 return USB_STOR_XFER_GOOD;
518}
519
520
521
522
523
524static int alauda_get_redu_data(struct us_data *us, u16 pba, unsigned char *data)
525{
526 int rc;
527 unsigned char command[] = {
528 ALAUDA_BULK_CMD, ALAUDA_BULK_GET_REDU_DATA,
529 PBA_HI(pba), PBA_ZONE(pba), 0, PBA_LO(pba), 0, 0, MEDIA_PORT(us)
530 };
531
532 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
533 command, 9, NULL);
534 if (rc != USB_STOR_XFER_GOOD)
535 return rc;
536
537 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
538 data, 16, NULL);
539}
540
541
542
543
544
545static u16 alauda_find_unused_pba(struct alauda_media_info *info,
546 unsigned int zone)
547{
548 u16 *pba_to_lba = info->pba_to_lba[zone];
549 unsigned int i;
550
551 for (i = 0; i < info->zonesize; i++)
552 if (pba_to_lba[i] == UNDEF)
553 return (zone << info->zoneshift) + i;
554
555 return 0;
556}
557
558
559
560
561
562static int alauda_read_map(struct us_data *us, unsigned int zone)
563{
564 unsigned char *data = us->iobuf;
565 int result;
566 int i, j;
567 unsigned int zonesize = MEDIA_INFO(us).zonesize;
568 unsigned int uzonesize = MEDIA_INFO(us).uzonesize;
569 unsigned int lba_offset, lba_real, blocknum;
570 unsigned int zone_base_lba = zone * uzonesize;
571 unsigned int zone_base_pba = zone * zonesize;
572 u16 *lba_to_pba = kcalloc(zonesize, sizeof(u16), GFP_NOIO);
573 u16 *pba_to_lba = kcalloc(zonesize, sizeof(u16), GFP_NOIO);
574 if (lba_to_pba == NULL || pba_to_lba == NULL) {
575 result = USB_STOR_TRANSPORT_ERROR;
576 goto error;
577 }
578
579 usb_stor_dbg(us, "Mapping blocks for zone %d\n", zone);
580
581
582 for (i = 0; i < zonesize; i++)
583 lba_to_pba[i] = pba_to_lba[i] = UNDEF;
584
585 for (i = 0; i < zonesize; i++) {
586 blocknum = zone_base_pba + i;
587
588 result = alauda_get_redu_data(us, blocknum, data);
589 if (result != USB_STOR_XFER_GOOD) {
590 result = USB_STOR_TRANSPORT_ERROR;
591 goto error;
592 }
593
594
595 for (j = 0; j < 16; j++)
596 if (data[j] != 0)
597 goto nonz;
598 pba_to_lba[i] = UNUSABLE;
599 usb_stor_dbg(us, "PBA %d has no logical mapping\n", blocknum);
600 continue;
601
602 nonz:
603
604 for (j = 0; j < 16; j++)
605 if (data[j] != 0xff)
606 goto nonff;
607 continue;
608
609 nonff:
610
611 if (j < 6) {
612 usb_stor_dbg(us, "PBA %d has no logical mapping: reserved area = %02X%02X%02X%02X data status %02X block status %02X\n",
613 blocknum,
614 data[0], data[1], data[2], data[3],
615 data[4], data[5]);
616 pba_to_lba[i] = UNUSABLE;
617 continue;
618 }
619
620 if ((data[6] >> 4) != 0x01) {
621 usb_stor_dbg(us, "PBA %d has invalid address field %02X%02X/%02X%02X\n",
622 blocknum, data[6], data[7],
623 data[11], data[12]);
624 pba_to_lba[i] = UNUSABLE;
625 continue;
626 }
627
628
629 if (parity[data[6] ^ data[7]]) {
630 printk(KERN_WARNING
631 "alauda_read_map: Bad parity in LBA for block %d"
632 " (%02X %02X)\n", i, data[6], data[7]);
633 pba_to_lba[i] = UNUSABLE;
634 continue;
635 }
636
637 lba_offset = short_pack(data[7], data[6]);
638 lba_offset = (lba_offset & 0x07FF) >> 1;
639 lba_real = lba_offset + zone_base_lba;
640
641
642
643
644
645
646
647
648
649
650 if (lba_offset >= uzonesize) {
651 printk(KERN_WARNING
652 "alauda_read_map: Bad low LBA %d for block %d\n",
653 lba_real, blocknum);
654 continue;
655 }
656
657 if (lba_to_pba[lba_offset] != UNDEF) {
658 printk(KERN_WARNING
659 "alauda_read_map: "
660 "LBA %d seen for PBA %d and %d\n",
661 lba_real, lba_to_pba[lba_offset], blocknum);
662 continue;
663 }
664
665 pba_to_lba[i] = lba_real;
666 lba_to_pba[lba_offset] = blocknum;
667 continue;
668 }
669
670 MEDIA_INFO(us).lba_to_pba[zone] = lba_to_pba;
671 MEDIA_INFO(us).pba_to_lba[zone] = pba_to_lba;
672 result = 0;
673 goto out;
674
675error:
676 kfree(lba_to_pba);
677 kfree(pba_to_lba);
678out:
679 return result;
680}
681
682
683
684
685
686static void alauda_ensure_map_for_zone(struct us_data *us, unsigned int zone)
687{
688 if (MEDIA_INFO(us).lba_to_pba[zone] == NULL
689 || MEDIA_INFO(us).pba_to_lba[zone] == NULL)
690 alauda_read_map(us, zone);
691}
692
693
694
695
696static int alauda_erase_block(struct us_data *us, u16 pba)
697{
698 int rc;
699 unsigned char command[] = {
700 ALAUDA_BULK_CMD, ALAUDA_BULK_ERASE_BLOCK, PBA_HI(pba),
701 PBA_ZONE(pba), 0, PBA_LO(pba), 0x02, 0, MEDIA_PORT(us)
702 };
703 unsigned char buf[2];
704
705 usb_stor_dbg(us, "Erasing PBA %d\n", pba);
706
707 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
708 command, 9, NULL);
709 if (rc != USB_STOR_XFER_GOOD)
710 return rc;
711
712 rc = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
713 buf, 2, NULL);
714 if (rc != USB_STOR_XFER_GOOD)
715 return rc;
716
717 usb_stor_dbg(us, "Erase result: %02X %02X\n", buf[0], buf[1]);
718 return rc;
719}
720
721
722
723
724
725static int alauda_read_block_raw(struct us_data *us, u16 pba,
726 unsigned int page, unsigned int pages, unsigned char *data)
727{
728 int rc;
729 unsigned char command[] = {
730 ALAUDA_BULK_CMD, ALAUDA_BULK_READ_BLOCK, PBA_HI(pba),
731 PBA_ZONE(pba), 0, PBA_LO(pba) + page, pages, 0, MEDIA_PORT(us)
732 };
733
734 usb_stor_dbg(us, "pba %d page %d count %d\n", pba, page, pages);
735
736 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
737 command, 9, NULL);
738 if (rc != USB_STOR_XFER_GOOD)
739 return rc;
740
741 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
742 data, (MEDIA_INFO(us).pagesize + 64) * pages, NULL);
743}
744
745
746
747
748
749
750
751static int alauda_read_block(struct us_data *us, u16 pba,
752 unsigned int page, unsigned int pages, unsigned char *data)
753{
754 int i, rc;
755 unsigned int pagesize = MEDIA_INFO(us).pagesize;
756
757 rc = alauda_read_block_raw(us, pba, page, pages, data);
758 if (rc != USB_STOR_XFER_GOOD)
759 return rc;
760
761
762 for (i = 0; i < pages; i++) {
763 int dest_offset = i * pagesize;
764 int src_offset = i * (pagesize + 64);
765 memmove(data + dest_offset, data + src_offset, pagesize);
766 }
767
768 return rc;
769}
770
771
772
773
774
775
776static int alauda_write_block(struct us_data *us, u16 pba, unsigned char *data)
777{
778 int rc;
779 struct alauda_info *info = (struct alauda_info *) us->extra;
780 unsigned char command[] = {
781 ALAUDA_BULK_CMD, ALAUDA_BULK_WRITE_BLOCK, PBA_HI(pba),
782 PBA_ZONE(pba), 0, PBA_LO(pba), 32, 0, MEDIA_PORT(us)
783 };
784
785 usb_stor_dbg(us, "pba %d\n", pba);
786
787 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
788 command, 9, NULL);
789 if (rc != USB_STOR_XFER_GOOD)
790 return rc;
791
792 rc = usb_stor_bulk_transfer_buf(us, info->wr_ep, data,
793 (MEDIA_INFO(us).pagesize + 64) * MEDIA_INFO(us).blocksize,
794 NULL);
795 if (rc != USB_STOR_XFER_GOOD)
796 return rc;
797
798 return alauda_check_status2(us);
799}
800
801
802
803
804static int alauda_write_lba(struct us_data *us, u16 lba,
805 unsigned int page, unsigned int pages,
806 unsigned char *ptr, unsigned char *blockbuffer)
807{
808 u16 pba, lbap, new_pba;
809 unsigned char *bptr, *cptr, *xptr;
810 unsigned char ecc[3];
811 int i, result;
812 unsigned int uzonesize = MEDIA_INFO(us).uzonesize;
813 unsigned int zonesize = MEDIA_INFO(us).zonesize;
814 unsigned int pagesize = MEDIA_INFO(us).pagesize;
815 unsigned int blocksize = MEDIA_INFO(us).blocksize;
816 unsigned int lba_offset = lba % uzonesize;
817 unsigned int new_pba_offset;
818 unsigned int zone = lba / uzonesize;
819
820 alauda_ensure_map_for_zone(us, zone);
821
822 pba = MEDIA_INFO(us).lba_to_pba[zone][lba_offset];
823 if (pba == 1) {
824
825
826 printk(KERN_WARNING
827 "alauda_write_lba: avoid writing to pba 1\n");
828 return USB_STOR_TRANSPORT_GOOD;
829 }
830
831 new_pba = alauda_find_unused_pba(&MEDIA_INFO(us), zone);
832 if (!new_pba) {
833 printk(KERN_WARNING
834 "alauda_write_lba: Out of unused blocks\n");
835 return USB_STOR_TRANSPORT_ERROR;
836 }
837
838
839 if (pba != UNDEF) {
840 result = alauda_read_block_raw(us, pba, 0,
841 blocksize, blockbuffer);
842 if (result != USB_STOR_XFER_GOOD)
843 return result;
844 } else {
845 memset(blockbuffer, 0, blocksize * (pagesize + 64));
846 }
847
848 lbap = (lba_offset << 1) | 0x1000;
849 if (parity[MSB_of(lbap) ^ LSB_of(lbap)])
850 lbap ^= 1;
851
852
853 for (i = 0; i < blocksize; i++) {
854 bptr = blockbuffer + (i * (pagesize + 64));
855 cptr = bptr + pagesize;
856 nand_compute_ecc(bptr, ecc);
857 if (!nand_compare_ecc(cptr+13, ecc)) {
858 usb_stor_dbg(us, "Warning: bad ecc in page %d- of pba %d\n",
859 i, pba);
860 nand_store_ecc(cptr+13, ecc);
861 }
862 nand_compute_ecc(bptr + (pagesize / 2), ecc);
863 if (!nand_compare_ecc(cptr+8, ecc)) {
864 usb_stor_dbg(us, "Warning: bad ecc in page %d+ of pba %d\n",
865 i, pba);
866 nand_store_ecc(cptr+8, ecc);
867 }
868 cptr[6] = cptr[11] = MSB_of(lbap);
869 cptr[7] = cptr[12] = LSB_of(lbap);
870 }
871
872
873 xptr = ptr;
874 for (i = page; i < page+pages; i++) {
875 bptr = blockbuffer + (i * (pagesize + 64));
876 cptr = bptr + pagesize;
877 memcpy(bptr, xptr, pagesize);
878 xptr += pagesize;
879 nand_compute_ecc(bptr, ecc);
880 nand_store_ecc(cptr+13, ecc);
881 nand_compute_ecc(bptr + (pagesize / 2), ecc);
882 nand_store_ecc(cptr+8, ecc);
883 }
884
885 result = alauda_write_block(us, new_pba, blockbuffer);
886 if (result != USB_STOR_XFER_GOOD)
887 return result;
888
889 new_pba_offset = new_pba - (zone * zonesize);
890 MEDIA_INFO(us).pba_to_lba[zone][new_pba_offset] = lba;
891 MEDIA_INFO(us).lba_to_pba[zone][lba_offset] = new_pba;
892 usb_stor_dbg(us, "Remapped LBA %d to PBA %d\n", lba, new_pba);
893
894 if (pba != UNDEF) {
895 unsigned int pba_offset = pba - (zone * zonesize);
896 result = alauda_erase_block(us, pba);
897 if (result != USB_STOR_XFER_GOOD)
898 return result;
899 MEDIA_INFO(us).pba_to_lba[zone][pba_offset] = UNDEF;
900 }
901
902 return USB_STOR_TRANSPORT_GOOD;
903}
904
905
906
907
908static int alauda_read_data(struct us_data *us, unsigned long address,
909 unsigned int sectors)
910{
911 unsigned char *buffer;
912 u16 lba, max_lba;
913 unsigned int page, len, offset;
914 unsigned int blockshift = MEDIA_INFO(us).blockshift;
915 unsigned int pageshift = MEDIA_INFO(us).pageshift;
916 unsigned int blocksize = MEDIA_INFO(us).blocksize;
917 unsigned int pagesize = MEDIA_INFO(us).pagesize;
918 unsigned int uzonesize = MEDIA_INFO(us).uzonesize;
919 struct scatterlist *sg;
920 int result;
921
922
923
924
925
926
927
928
929
930 len = min(sectors, blocksize) * (pagesize + 64);
931 buffer = kmalloc(len, GFP_NOIO);
932 if (buffer == NULL) {
933 printk(KERN_WARNING "alauda_read_data: Out of memory\n");
934 return USB_STOR_TRANSPORT_ERROR;
935 }
936
937
938 lba = address >> blockshift;
939 page = (address & MEDIA_INFO(us).blockmask);
940 max_lba = MEDIA_INFO(us).capacity >> (blockshift + pageshift);
941
942 result = USB_STOR_TRANSPORT_GOOD;
943 offset = 0;
944 sg = NULL;
945
946 while (sectors > 0) {
947 unsigned int zone = lba / uzonesize;
948 unsigned int lba_offset = lba - (zone * uzonesize);
949 unsigned int pages;
950 u16 pba;
951 alauda_ensure_map_for_zone(us, zone);
952
953
954 if (lba >= max_lba) {
955 usb_stor_dbg(us, "Error: Requested lba %u exceeds maximum %u\n",
956 lba, max_lba);
957 result = USB_STOR_TRANSPORT_ERROR;
958 break;
959 }
960
961
962 pages = min(sectors, blocksize - page);
963 len = pages << pageshift;
964
965
966 pba = MEDIA_INFO(us).lba_to_pba[zone][lba_offset];
967
968 if (pba == UNDEF) {
969 usb_stor_dbg(us, "Read %d zero pages (LBA %d) page %d\n",
970 pages, lba, page);
971
972
973
974
975
976
977 memset(buffer, 0, len);
978 } else {
979 usb_stor_dbg(us, "Read %d pages, from PBA %d (LBA %d) page %d\n",
980 pages, pba, lba, page);
981
982 result = alauda_read_block(us, pba, page, pages, buffer);
983 if (result != USB_STOR_TRANSPORT_GOOD)
984 break;
985 }
986
987
988 usb_stor_access_xfer_buf(buffer, len, us->srb,
989 &sg, &offset, TO_XFER_BUF);
990
991 page = 0;
992 lba++;
993 sectors -= pages;
994 }
995
996 kfree(buffer);
997 return result;
998}
999
1000
1001
1002
1003static int alauda_write_data(struct us_data *us, unsigned long address,
1004 unsigned int sectors)
1005{
1006 unsigned char *buffer, *blockbuffer;
1007 unsigned int page, len, offset;
1008 unsigned int blockshift = MEDIA_INFO(us).blockshift;
1009 unsigned int pageshift = MEDIA_INFO(us).pageshift;
1010 unsigned int blocksize = MEDIA_INFO(us).blocksize;
1011 unsigned int pagesize = MEDIA_INFO(us).pagesize;
1012 struct scatterlist *sg;
1013 u16 lba, max_lba;
1014 int result;
1015
1016
1017
1018
1019
1020
1021
1022 len = min(sectors, blocksize) * pagesize;
1023 buffer = kmalloc(len, GFP_NOIO);
1024 if (buffer == NULL) {
1025 printk(KERN_WARNING "alauda_write_data: Out of memory\n");
1026 return USB_STOR_TRANSPORT_ERROR;
1027 }
1028
1029
1030
1031
1032
1033 blockbuffer = kmalloc((pagesize + 64) * blocksize, GFP_NOIO);
1034 if (blockbuffer == NULL) {
1035 printk(KERN_WARNING "alauda_write_data: Out of memory\n");
1036 kfree(buffer);
1037 return USB_STOR_TRANSPORT_ERROR;
1038 }
1039
1040
1041 lba = address >> blockshift;
1042 page = (address & MEDIA_INFO(us).blockmask);
1043 max_lba = MEDIA_INFO(us).capacity >> (pageshift + blockshift);
1044
1045 result = USB_STOR_TRANSPORT_GOOD;
1046 offset = 0;
1047 sg = NULL;
1048
1049 while (sectors > 0) {
1050
1051 unsigned int pages = min(sectors, blocksize - page);
1052 len = pages << pageshift;
1053
1054
1055 if (lba >= max_lba) {
1056 usb_stor_dbg(us, "Requested lba %u exceeds maximum %u\n",
1057 lba, max_lba);
1058 result = USB_STOR_TRANSPORT_ERROR;
1059 break;
1060 }
1061
1062
1063 usb_stor_access_xfer_buf(buffer, len, us->srb,
1064 &sg, &offset, FROM_XFER_BUF);
1065
1066 result = alauda_write_lba(us, lba, page, pages, buffer,
1067 blockbuffer);
1068 if (result != USB_STOR_TRANSPORT_GOOD)
1069 break;
1070
1071 page = 0;
1072 lba++;
1073 sectors -= pages;
1074 }
1075
1076 kfree(buffer);
1077 kfree(blockbuffer);
1078 return result;
1079}
1080
1081
1082
1083
1084
1085static void alauda_info_destructor(void *extra)
1086{
1087 struct alauda_info *info = (struct alauda_info *) extra;
1088 int port;
1089
1090 if (!info)
1091 return;
1092
1093 for (port = 0; port < 2; port++) {
1094 struct alauda_media_info *media_info = &info->port[port];
1095
1096 alauda_free_maps(media_info);
1097 kfree(media_info->lba_to_pba);
1098 kfree(media_info->pba_to_lba);
1099 }
1100}
1101
1102
1103
1104
1105static int init_alauda(struct us_data *us)
1106{
1107 struct alauda_info *info;
1108 struct usb_host_interface *altsetting = us->pusb_intf->cur_altsetting;
1109 nand_init_ecc();
1110
1111 us->extra = kzalloc(sizeof(struct alauda_info), GFP_NOIO);
1112 if (!us->extra)
1113 return USB_STOR_TRANSPORT_ERROR;
1114
1115 info = (struct alauda_info *) us->extra;
1116 us->extra_destructor = alauda_info_destructor;
1117
1118 info->wr_ep = usb_sndbulkpipe(us->pusb_dev,
1119 altsetting->endpoint[0].desc.bEndpointAddress
1120 & USB_ENDPOINT_NUMBER_MASK);
1121
1122 return USB_STOR_TRANSPORT_GOOD;
1123}
1124
1125static int alauda_transport(struct scsi_cmnd *srb, struct us_data *us)
1126{
1127 int rc;
1128 struct alauda_info *info = (struct alauda_info *) us->extra;
1129 unsigned char *ptr = us->iobuf;
1130 static unsigned char inquiry_response[36] = {
1131 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
1132 };
1133
1134 if (srb->cmnd[0] == INQUIRY) {
1135 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
1136 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
1137 fill_inquiry_response(us, ptr, 36);
1138 return USB_STOR_TRANSPORT_GOOD;
1139 }
1140
1141 if (srb->cmnd[0] == TEST_UNIT_READY) {
1142 usb_stor_dbg(us, "TEST_UNIT_READY\n");
1143 return alauda_check_media(us);
1144 }
1145
1146 if (srb->cmnd[0] == READ_CAPACITY) {
1147 unsigned int num_zones;
1148 unsigned long capacity;
1149
1150 rc = alauda_check_media(us);
1151 if (rc != USB_STOR_TRANSPORT_GOOD)
1152 return rc;
1153
1154 num_zones = MEDIA_INFO(us).capacity >> (MEDIA_INFO(us).zoneshift
1155 + MEDIA_INFO(us).blockshift + MEDIA_INFO(us).pageshift);
1156
1157 capacity = num_zones * MEDIA_INFO(us).uzonesize
1158 * MEDIA_INFO(us).blocksize;
1159
1160
1161 ((__be32 *) ptr)[0] = cpu_to_be32(capacity - 1);
1162 ((__be32 *) ptr)[1] = cpu_to_be32(512);
1163
1164 usb_stor_set_xfer_buf(ptr, 8, srb);
1165 return USB_STOR_TRANSPORT_GOOD;
1166 }
1167
1168 if (srb->cmnd[0] == READ_10) {
1169 unsigned int page, pages;
1170
1171 rc = alauda_check_media(us);
1172 if (rc != USB_STOR_TRANSPORT_GOOD)
1173 return rc;
1174
1175 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
1176 page <<= 16;
1177 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
1178 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
1179
1180 usb_stor_dbg(us, "READ_10: page %d pagect %d\n", page, pages);
1181
1182 return alauda_read_data(us, page, pages);
1183 }
1184
1185 if (srb->cmnd[0] == WRITE_10) {
1186 unsigned int page, pages;
1187
1188 rc = alauda_check_media(us);
1189 if (rc != USB_STOR_TRANSPORT_GOOD)
1190 return rc;
1191
1192 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
1193 page <<= 16;
1194 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
1195 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
1196
1197 usb_stor_dbg(us, "WRITE_10: page %d pagect %d\n", page, pages);
1198
1199 return alauda_write_data(us, page, pages);
1200 }
1201
1202 if (srb->cmnd[0] == REQUEST_SENSE) {
1203 usb_stor_dbg(us, "REQUEST_SENSE\n");
1204
1205 memset(ptr, 0, 18);
1206 ptr[0] = 0xF0;
1207 ptr[2] = info->sense_key;
1208 ptr[7] = 11;
1209 ptr[12] = info->sense_asc;
1210 ptr[13] = info->sense_ascq;
1211 usb_stor_set_xfer_buf(ptr, 18, srb);
1212
1213 return USB_STOR_TRANSPORT_GOOD;
1214 }
1215
1216 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
1217
1218
1219 return USB_STOR_TRANSPORT_GOOD;
1220 }
1221
1222 usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
1223 srb->cmnd[0], srb->cmnd[0]);
1224 info->sense_key = 0x05;
1225 info->sense_asc = 0x20;
1226 info->sense_ascq = 0x00;
1227 return USB_STOR_TRANSPORT_FAILED;
1228}
1229
1230static int alauda_probe(struct usb_interface *intf,
1231 const struct usb_device_id *id)
1232{
1233 struct us_data *us;
1234 int result;
1235
1236 result = usb_stor_probe1(&us, intf, id,
1237 (id - alauda_usb_ids) + alauda_unusual_dev_list);
1238 if (result)
1239 return result;
1240
1241 us->transport_name = "Alauda Control/Bulk";
1242 us->transport = alauda_transport;
1243 us->transport_reset = usb_stor_Bulk_reset;
1244 us->max_lun = 1;
1245
1246 result = usb_stor_probe2(us);
1247 return result;
1248}
1249
1250static struct usb_driver alauda_driver = {
1251 .name = "ums-alauda",
1252 .probe = alauda_probe,
1253 .disconnect = usb_stor_disconnect,
1254 .suspend = usb_stor_suspend,
1255 .resume = usb_stor_resume,
1256 .reset_resume = usb_stor_reset_resume,
1257 .pre_reset = usb_stor_pre_reset,
1258 .post_reset = usb_stor_post_reset,
1259 .id_table = alauda_usb_ids,
1260 .soft_unbind = 1,
1261 .no_dynamic_id = 1,
1262};
1263
1264module_usb_driver(alauda_driver);
1265