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13
14#define DRIVER_NAME "ms_block"
15#define pr_fmt(fmt) DRIVER_NAME ": " fmt
16
17#include <linux/module.h>
18#include <linux/blkdev.h>
19#include <linux/memstick.h>
20#include <linux/idr.h>
21#include <linux/hdreg.h>
22#include <linux/delay.h>
23#include <linux/slab.h>
24#include <linux/random.h>
25#include <linux/bitmap.h>
26#include <linux/scatterlist.h>
27#include <linux/jiffies.h>
28#include <linux/workqueue.h>
29#include <linux/mutex.h>
30#include "ms_block.h"
31
32static int debug;
33static int cache_flush_timeout = 1000;
34static bool verify_writes;
35
36
37
38
39
40static size_t msb_sg_copy(struct scatterlist *sg_from,
41 struct scatterlist *sg_to, int to_nents, size_t offset, size_t len)
42{
43 size_t copied = 0;
44
45 while (offset > 0) {
46 if (offset >= sg_from->length) {
47 if (sg_is_last(sg_from))
48 return 0;
49
50 offset -= sg_from->length;
51 sg_from = sg_next(sg_from);
52 continue;
53 }
54
55 copied = min(len, sg_from->length - offset);
56 sg_set_page(sg_to, sg_page(sg_from),
57 copied, sg_from->offset + offset);
58
59 len -= copied;
60 offset = 0;
61
62 if (sg_is_last(sg_from) || !len)
63 goto out;
64
65 sg_to = sg_next(sg_to);
66 to_nents--;
67 sg_from = sg_next(sg_from);
68 }
69
70 while (len > sg_from->length && to_nents--) {
71 len -= sg_from->length;
72 copied += sg_from->length;
73
74 sg_set_page(sg_to, sg_page(sg_from),
75 sg_from->length, sg_from->offset);
76
77 if (sg_is_last(sg_from) || !len)
78 goto out;
79
80 sg_from = sg_next(sg_from);
81 sg_to = sg_next(sg_to);
82 }
83
84 if (len && to_nents) {
85 sg_set_page(sg_to, sg_page(sg_from), len, sg_from->offset);
86 copied += len;
87 }
88out:
89 sg_mark_end(sg_to);
90 return copied;
91}
92
93
94
95
96
97
98static int msb_sg_compare_to_buffer(struct scatterlist *sg,
99 size_t offset, u8 *buffer, size_t len)
100{
101 int retval = 0, cmplen;
102 struct sg_mapping_iter miter;
103
104 sg_miter_start(&miter, sg, sg_nents(sg),
105 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
106
107 while (sg_miter_next(&miter) && len > 0) {
108 if (offset >= miter.length) {
109 offset -= miter.length;
110 continue;
111 }
112
113 cmplen = min(miter.length - offset, len);
114 retval = memcmp(miter.addr + offset, buffer, cmplen) ? -1 : 0;
115 if (retval)
116 break;
117
118 buffer += cmplen;
119 len -= cmplen;
120 offset = 0;
121 }
122
123 if (!retval && len)
124 retval = -1;
125
126 sg_miter_stop(&miter);
127 return retval;
128}
129
130
131
132
133
134
135
136
137static int msb_get_zone_from_lba(int lba)
138{
139 if (lba < 494)
140 return 0;
141 return ((lba - 494) / 496) + 1;
142}
143
144
145static int msb_get_zone_from_pba(int pba)
146{
147 return pba / MS_BLOCKS_IN_ZONE;
148}
149
150
151static int msb_validate_used_block_bitmap(struct msb_data *msb)
152{
153 int total_free_blocks = 0;
154 int i;
155
156 if (!debug)
157 return 0;
158
159 for (i = 0; i < msb->zone_count; i++)
160 total_free_blocks += msb->free_block_count[i];
161
162 if (msb->block_count - bitmap_weight(msb->used_blocks_bitmap,
163 msb->block_count) == total_free_blocks)
164 return 0;
165
166 pr_err("BUG: free block counts don't match the bitmap");
167 msb->read_only = true;
168 return -EINVAL;
169}
170
171
172static void msb_mark_block_used(struct msb_data *msb, int pba)
173{
174 int zone = msb_get_zone_from_pba(pba);
175
176 if (test_bit(pba, msb->used_blocks_bitmap)) {
177 pr_err(
178 "BUG: attempt to mark already used pba %d as used", pba);
179 msb->read_only = true;
180 return;
181 }
182
183 if (msb_validate_used_block_bitmap(msb))
184 return;
185
186
187 __set_bit(pba, msb->used_blocks_bitmap);
188 msb->free_block_count[zone]--;
189}
190
191
192static void msb_mark_block_unused(struct msb_data *msb, int pba)
193{
194 int zone = msb_get_zone_from_pba(pba);
195
196 if (!test_bit(pba, msb->used_blocks_bitmap)) {
197 pr_err("BUG: attempt to mark already unused pba %d as unused" , pba);
198 msb->read_only = true;
199 return;
200 }
201
202 if (msb_validate_used_block_bitmap(msb))
203 return;
204
205
206 __clear_bit(pba, msb->used_blocks_bitmap);
207 msb->free_block_count[zone]++;
208}
209
210
211static void msb_invalidate_reg_window(struct msb_data *msb)
212{
213 msb->reg_addr.w_offset = offsetof(struct ms_register, id);
214 msb->reg_addr.w_length = sizeof(struct ms_id_register);
215 msb->reg_addr.r_offset = offsetof(struct ms_register, id);
216 msb->reg_addr.r_length = sizeof(struct ms_id_register);
217 msb->addr_valid = false;
218}
219
220
221static int msb_run_state_machine(struct msb_data *msb, int (*state_func)
222 (struct memstick_dev *card, struct memstick_request **req))
223{
224 struct memstick_dev *card = msb->card;
225
226 WARN_ON(msb->state != -1);
227 msb->int_polling = false;
228 msb->state = 0;
229 msb->exit_error = 0;
230
231 memset(&card->current_mrq, 0, sizeof(card->current_mrq));
232
233 card->next_request = state_func;
234 memstick_new_req(card->host);
235 wait_for_completion(&card->mrq_complete);
236
237 WARN_ON(msb->state != -1);
238 return msb->exit_error;
239}
240
241
242static int msb_exit_state_machine(struct msb_data *msb, int error)
243{
244 WARN_ON(msb->state == -1);
245
246 msb->state = -1;
247 msb->exit_error = error;
248 msb->card->next_request = h_msb_default_bad;
249
250
251 if (error)
252 msb_invalidate_reg_window(msb);
253
254 complete(&msb->card->mrq_complete);
255 return -ENXIO;
256}
257
258
259static int msb_read_int_reg(struct msb_data *msb, long timeout)
260{
261 struct memstick_request *mrq = &msb->card->current_mrq;
262
263 WARN_ON(msb->state == -1);
264
265 if (!msb->int_polling) {
266 msb->int_timeout = jiffies +
267 msecs_to_jiffies(timeout == -1 ? 500 : timeout);
268 msb->int_polling = true;
269 } else if (time_after(jiffies, msb->int_timeout)) {
270 mrq->data[0] = MEMSTICK_INT_CMDNAK;
271 return 0;
272 }
273
274 if ((msb->caps & MEMSTICK_CAP_AUTO_GET_INT) &&
275 mrq->need_card_int && !mrq->error) {
276 mrq->data[0] = mrq->int_reg;
277 mrq->need_card_int = false;
278 return 0;
279 } else {
280 memstick_init_req(mrq, MS_TPC_GET_INT, NULL, 1);
281 return 1;
282 }
283}
284
285
286static int msb_read_regs(struct msb_data *msb, int offset, int len)
287{
288 struct memstick_request *req = &msb->card->current_mrq;
289
290 if (msb->reg_addr.r_offset != offset ||
291 msb->reg_addr.r_length != len || !msb->addr_valid) {
292
293 msb->reg_addr.r_offset = offset;
294 msb->reg_addr.r_length = len;
295 msb->addr_valid = true;
296
297 memstick_init_req(req, MS_TPC_SET_RW_REG_ADRS,
298 &msb->reg_addr, sizeof(msb->reg_addr));
299 return 0;
300 }
301
302 memstick_init_req(req, MS_TPC_READ_REG, NULL, len);
303 return 1;
304}
305
306
307static int msb_write_regs(struct msb_data *msb, int offset, int len, void *buf)
308{
309 struct memstick_request *req = &msb->card->current_mrq;
310
311 if (msb->reg_addr.w_offset != offset ||
312 msb->reg_addr.w_length != len || !msb->addr_valid) {
313
314 msb->reg_addr.w_offset = offset;
315 msb->reg_addr.w_length = len;
316 msb->addr_valid = true;
317
318 memstick_init_req(req, MS_TPC_SET_RW_REG_ADRS,
319 &msb->reg_addr, sizeof(msb->reg_addr));
320 return 0;
321 }
322
323 memstick_init_req(req, MS_TPC_WRITE_REG, buf, len);
324 return 1;
325}
326
327
328static int h_msb_default_bad(struct memstick_dev *card,
329 struct memstick_request **mrq)
330{
331 return -ENXIO;
332}
333
334
335
336
337
338
339static int h_msb_read_page(struct memstick_dev *card,
340 struct memstick_request **out_mrq)
341{
342 struct msb_data *msb = memstick_get_drvdata(card);
343 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
344 struct scatterlist sg[2];
345 u8 command, intreg;
346
347 if (mrq->error) {
348 dbg("read_page, unknown error");
349 return msb_exit_state_machine(msb, mrq->error);
350 }
351again:
352 switch (msb->state) {
353 case MSB_RP_SEND_BLOCK_ADDRESS:
354
355
356
357 if (!msb_write_regs(msb,
358 offsetof(struct ms_register, param),
359 sizeof(struct ms_param_register),
360 (unsigned char *)&msb->regs.param))
361 return 0;
362
363 msb->state = MSB_RP_SEND_READ_COMMAND;
364 return 0;
365
366 case MSB_RP_SEND_READ_COMMAND:
367 command = MS_CMD_BLOCK_READ;
368 memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
369 msb->state = MSB_RP_SEND_INT_REQ;
370 return 0;
371
372 case MSB_RP_SEND_INT_REQ:
373 msb->state = MSB_RP_RECEIVE_INT_REQ_RESULT;
374
375
376 if (msb_read_int_reg(msb, -1))
377 return 0;
378
379
380 case MSB_RP_RECEIVE_INT_REQ_RESULT:
381 intreg = mrq->data[0];
382 msb->regs.status.interrupt = intreg;
383
384 if (intreg & MEMSTICK_INT_CMDNAK)
385 return msb_exit_state_machine(msb, -EIO);
386
387 if (!(intreg & MEMSTICK_INT_CED)) {
388 msb->state = MSB_RP_SEND_INT_REQ;
389 goto again;
390 }
391
392 msb->int_polling = false;
393 msb->state = (intreg & MEMSTICK_INT_ERR) ?
394 MSB_RP_SEND_READ_STATUS_REG : MSB_RP_SEND_OOB_READ;
395 goto again;
396
397 case MSB_RP_SEND_READ_STATUS_REG:
398
399 if (!msb_read_regs(msb,
400 offsetof(struct ms_register, status),
401 sizeof(struct ms_status_register)))
402 return 0;
403
404 msb->state = MSB_RP_RECEIVE_STATUS_REG;
405 return 0;
406
407 case MSB_RP_RECEIVE_STATUS_REG:
408 msb->regs.status = *(struct ms_status_register *)mrq->data;
409 msb->state = MSB_RP_SEND_OOB_READ;
410
411
412 case MSB_RP_SEND_OOB_READ:
413 if (!msb_read_regs(msb,
414 offsetof(struct ms_register, extra_data),
415 sizeof(struct ms_extra_data_register)))
416 return 0;
417
418 msb->state = MSB_RP_RECEIVE_OOB_READ;
419 return 0;
420
421 case MSB_RP_RECEIVE_OOB_READ:
422 msb->regs.extra_data =
423 *(struct ms_extra_data_register *) mrq->data;
424 msb->state = MSB_RP_SEND_READ_DATA;
425
426
427 case MSB_RP_SEND_READ_DATA:
428
429 if (msb->regs.param.cp == MEMSTICK_CP_EXTRA) {
430 msb->state = MSB_RP_RECEIVE_READ_DATA;
431 goto again;
432 }
433
434 sg_init_table(sg, ARRAY_SIZE(sg));
435 msb_sg_copy(msb->current_sg, sg, ARRAY_SIZE(sg),
436 msb->current_sg_offset,
437 msb->page_size);
438
439 memstick_init_req_sg(mrq, MS_TPC_READ_LONG_DATA, sg);
440 msb->state = MSB_RP_RECEIVE_READ_DATA;
441 return 0;
442
443 case MSB_RP_RECEIVE_READ_DATA:
444 if (!(msb->regs.status.interrupt & MEMSTICK_INT_ERR)) {
445 msb->current_sg_offset += msb->page_size;
446 return msb_exit_state_machine(msb, 0);
447 }
448
449 if (msb->regs.status.status1 & MEMSTICK_UNCORR_ERROR) {
450 dbg("read_page: uncorrectable error");
451 return msb_exit_state_machine(msb, -EBADMSG);
452 }
453
454 if (msb->regs.status.status1 & MEMSTICK_CORR_ERROR) {
455 dbg("read_page: correctable error");
456 msb->current_sg_offset += msb->page_size;
457 return msb_exit_state_machine(msb, -EUCLEAN);
458 } else {
459 dbg("read_page: INT error, but no status error bits");
460 return msb_exit_state_machine(msb, -EIO);
461 }
462 }
463
464 BUG();
465}
466
467
468
469
470
471
472
473
474
475static int h_msb_write_block(struct memstick_dev *card,
476 struct memstick_request **out_mrq)
477{
478 struct msb_data *msb = memstick_get_drvdata(card);
479 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
480 struct scatterlist sg[2];
481 u8 intreg, command;
482
483 if (mrq->error)
484 return msb_exit_state_machine(msb, mrq->error);
485
486again:
487 switch (msb->state) {
488
489
490
491
492
493
494
495 case MSB_WB_SEND_WRITE_PARAMS:
496 if (!msb_write_regs(msb,
497 offsetof(struct ms_register, param),
498 sizeof(struct ms_param_register),
499 &msb->regs.param))
500 return 0;
501
502 msb->state = MSB_WB_SEND_WRITE_OOB;
503 return 0;
504
505 case MSB_WB_SEND_WRITE_OOB:
506 if (!msb_write_regs(msb,
507 offsetof(struct ms_register, extra_data),
508 sizeof(struct ms_extra_data_register),
509 &msb->regs.extra_data))
510 return 0;
511 msb->state = MSB_WB_SEND_WRITE_COMMAND;
512 return 0;
513
514
515 case MSB_WB_SEND_WRITE_COMMAND:
516 command = MS_CMD_BLOCK_WRITE;
517 memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
518 msb->state = MSB_WB_SEND_INT_REQ;
519 return 0;
520
521 case MSB_WB_SEND_INT_REQ:
522 msb->state = MSB_WB_RECEIVE_INT_REQ;
523 if (msb_read_int_reg(msb, -1))
524 return 0;
525
526
527 case MSB_WB_RECEIVE_INT_REQ:
528 intreg = mrq->data[0];
529 msb->regs.status.interrupt = intreg;
530
531
532 if (intreg & (MEMSTICK_INT_CMDNAK))
533 return msb_exit_state_machine(msb, -EIO);
534
535 if (intreg & MEMSTICK_INT_ERR)
536 return msb_exit_state_machine(msb, -EBADMSG);
537
538
539
540 if (msb->current_page == msb->pages_in_block) {
541 if (intreg & MEMSTICK_INT_CED)
542 return msb_exit_state_machine(msb, 0);
543 msb->state = MSB_WB_SEND_INT_REQ;
544 goto again;
545
546 }
547
548
549 if (!(intreg & MEMSTICK_INT_BREQ)) {
550 msb->state = MSB_WB_SEND_INT_REQ;
551 goto again;
552 }
553
554 msb->int_polling = false;
555 msb->state = MSB_WB_SEND_WRITE_DATA;
556
557
558 case MSB_WB_SEND_WRITE_DATA:
559 sg_init_table(sg, ARRAY_SIZE(sg));
560
561 if (msb_sg_copy(msb->current_sg, sg, ARRAY_SIZE(sg),
562 msb->current_sg_offset,
563 msb->page_size) < msb->page_size)
564 return msb_exit_state_machine(msb, -EIO);
565
566 memstick_init_req_sg(mrq, MS_TPC_WRITE_LONG_DATA, sg);
567 mrq->need_card_int = 1;
568 msb->state = MSB_WB_RECEIVE_WRITE_CONFIRMATION;
569 return 0;
570
571 case MSB_WB_RECEIVE_WRITE_CONFIRMATION:
572 msb->current_page++;
573 msb->current_sg_offset += msb->page_size;
574 msb->state = MSB_WB_SEND_INT_REQ;
575 goto again;
576 default:
577 BUG();
578 }
579
580 return 0;
581}
582
583
584
585
586
587static int h_msb_send_command(struct memstick_dev *card,
588 struct memstick_request **out_mrq)
589{
590 struct msb_data *msb = memstick_get_drvdata(card);
591 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
592 u8 intreg;
593
594 if (mrq->error) {
595 dbg("send_command: unknown error");
596 return msb_exit_state_machine(msb, mrq->error);
597 }
598again:
599 switch (msb->state) {
600
601
602 case MSB_SC_SEND_WRITE_PARAMS:
603 if (!msb_write_regs(msb,
604 offsetof(struct ms_register, param),
605 sizeof(struct ms_param_register),
606 &msb->regs.param))
607 return 0;
608 msb->state = MSB_SC_SEND_WRITE_OOB;
609 return 0;
610
611 case MSB_SC_SEND_WRITE_OOB:
612 if (!msb->command_need_oob) {
613 msb->state = MSB_SC_SEND_COMMAND;
614 goto again;
615 }
616
617 if (!msb_write_regs(msb,
618 offsetof(struct ms_register, extra_data),
619 sizeof(struct ms_extra_data_register),
620 &msb->regs.extra_data))
621 return 0;
622
623 msb->state = MSB_SC_SEND_COMMAND;
624 return 0;
625
626 case MSB_SC_SEND_COMMAND:
627 memstick_init_req(mrq, MS_TPC_SET_CMD, &msb->command_value, 1);
628 msb->state = MSB_SC_SEND_INT_REQ;
629 return 0;
630
631 case MSB_SC_SEND_INT_REQ:
632 msb->state = MSB_SC_RECEIVE_INT_REQ;
633 if (msb_read_int_reg(msb, -1))
634 return 0;
635
636
637 case MSB_SC_RECEIVE_INT_REQ:
638 intreg = mrq->data[0];
639
640 if (intreg & MEMSTICK_INT_CMDNAK)
641 return msb_exit_state_machine(msb, -EIO);
642 if (intreg & MEMSTICK_INT_ERR)
643 return msb_exit_state_machine(msb, -EBADMSG);
644
645 if (!(intreg & MEMSTICK_INT_CED)) {
646 msb->state = MSB_SC_SEND_INT_REQ;
647 goto again;
648 }
649
650 return msb_exit_state_machine(msb, 0);
651 }
652
653 BUG();
654}
655
656
657static int h_msb_reset(struct memstick_dev *card,
658 struct memstick_request **out_mrq)
659{
660 u8 command = MS_CMD_RESET;
661 struct msb_data *msb = memstick_get_drvdata(card);
662 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
663
664 if (mrq->error)
665 return msb_exit_state_machine(msb, mrq->error);
666
667 switch (msb->state) {
668 case MSB_RS_SEND:
669 memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
670 mrq->need_card_int = 0;
671 msb->state = MSB_RS_CONFIRM;
672 return 0;
673 case MSB_RS_CONFIRM:
674 return msb_exit_state_machine(msb, 0);
675 }
676 BUG();
677}
678
679
680static int h_msb_parallel_switch(struct memstick_dev *card,
681 struct memstick_request **out_mrq)
682{
683 struct msb_data *msb = memstick_get_drvdata(card);
684 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
685 struct memstick_host *host = card->host;
686
687 if (mrq->error) {
688 dbg("parallel_switch: error");
689 msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
690 return msb_exit_state_machine(msb, mrq->error);
691 }
692
693 switch (msb->state) {
694 case MSB_PS_SEND_SWITCH_COMMAND:
695
696 msb->regs.param.system |= MEMSTICK_SYS_PAM;
697
698 if (!msb_write_regs(msb,
699 offsetof(struct ms_register, param),
700 1,
701 (unsigned char *)&msb->regs.param))
702 return 0;
703
704 msb->state = MSB_PS_SWICH_HOST;
705 return 0;
706
707 case MSB_PS_SWICH_HOST:
708
709
710 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
711 memstick_init_req(mrq, MS_TPC_GET_INT, NULL, 1);
712 msb->state = MSB_PS_CONFIRM;
713 return 0;
714
715 case MSB_PS_CONFIRM:
716 return msb_exit_state_machine(msb, 0);
717 }
718
719 BUG();
720}
721
722static int msb_switch_to_parallel(struct msb_data *msb);
723
724
725static int msb_reset(struct msb_data *msb, bool full)
726{
727
728 bool was_parallel = msb->regs.param.system & MEMSTICK_SYS_PAM;
729 struct memstick_dev *card = msb->card;
730 struct memstick_host *host = card->host;
731 int error;
732
733
734 msb->regs.param.system = MEMSTICK_SYS_BAMD;
735
736 if (full) {
737 error = host->set_param(host,
738 MEMSTICK_POWER, MEMSTICK_POWER_OFF);
739 if (error)
740 goto out_error;
741
742 msb_invalidate_reg_window(msb);
743
744 error = host->set_param(host,
745 MEMSTICK_POWER, MEMSTICK_POWER_ON);
746 if (error)
747 goto out_error;
748
749 error = host->set_param(host,
750 MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
751 if (error) {
752out_error:
753 dbg("Failed to reset the host controller");
754 msb->read_only = true;
755 return -EFAULT;
756 }
757 }
758
759 error = msb_run_state_machine(msb, h_msb_reset);
760 if (error) {
761 dbg("Failed to reset the card");
762 msb->read_only = true;
763 return -ENODEV;
764 }
765
766
767 if (was_parallel)
768 msb_switch_to_parallel(msb);
769 return 0;
770}
771
772
773static int msb_switch_to_parallel(struct msb_data *msb)
774{
775 int error;
776
777 error = msb_run_state_machine(msb, h_msb_parallel_switch);
778 if (error) {
779 pr_err("Switch to parallel failed");
780 msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
781 msb_reset(msb, true);
782 return -EFAULT;
783 }
784
785 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
786 return 0;
787}
788
789
790static int msb_set_overwrite_flag(struct msb_data *msb,
791 u16 pba, u8 page, u8 flag)
792{
793 if (msb->read_only)
794 return -EROFS;
795
796 msb->regs.param.block_address = cpu_to_be16(pba);
797 msb->regs.param.page_address = page;
798 msb->regs.param.cp = MEMSTICK_CP_OVERWRITE;
799 msb->regs.extra_data.overwrite_flag = flag;
800 msb->command_value = MS_CMD_BLOCK_WRITE;
801 msb->command_need_oob = true;
802
803 dbg_verbose("changing overwrite flag to %02x for sector %d, page %d",
804 flag, pba, page);
805 return msb_run_state_machine(msb, h_msb_send_command);
806}
807
808static int msb_mark_bad(struct msb_data *msb, int pba)
809{
810 pr_notice("marking pba %d as bad", pba);
811 msb_reset(msb, true);
812 return msb_set_overwrite_flag(
813 msb, pba, 0, 0xFF & ~MEMSTICK_OVERWRITE_BKST);
814}
815
816static int msb_mark_page_bad(struct msb_data *msb, int pba, int page)
817{
818 dbg("marking page %d of pba %d as bad", page, pba);
819 msb_reset(msb, true);
820 return msb_set_overwrite_flag(msb,
821 pba, page, ~MEMSTICK_OVERWRITE_PGST0);
822}
823
824
825static int msb_erase_block(struct msb_data *msb, u16 pba)
826{
827 int error, try;
828 if (msb->read_only)
829 return -EROFS;
830
831 dbg_verbose("erasing pba %d", pba);
832
833 for (try = 1; try < 3; try++) {
834 msb->regs.param.block_address = cpu_to_be16(pba);
835 msb->regs.param.page_address = 0;
836 msb->regs.param.cp = MEMSTICK_CP_BLOCK;
837 msb->command_value = MS_CMD_BLOCK_ERASE;
838 msb->command_need_oob = false;
839
840
841 error = msb_run_state_machine(msb, h_msb_send_command);
842 if (!error || msb_reset(msb, true))
843 break;
844 }
845
846 if (error) {
847 pr_err("erase failed, marking pba %d as bad", pba);
848 msb_mark_bad(msb, pba);
849 }
850
851 dbg_verbose("erase success, marking pba %d as unused", pba);
852 msb_mark_block_unused(msb, pba);
853 __set_bit(pba, msb->erased_blocks_bitmap);
854 return error;
855}
856
857
858static int msb_read_page(struct msb_data *msb,
859 u16 pba, u8 page, struct ms_extra_data_register *extra,
860 struct scatterlist *sg, int offset)
861{
862 int try, error;
863
864 if (pba == MS_BLOCK_INVALID) {
865 unsigned long flags;
866 struct sg_mapping_iter miter;
867 size_t len = msb->page_size;
868
869 dbg_verbose("read unmapped sector. returning 0xFF");
870
871 local_irq_save(flags);
872 sg_miter_start(&miter, sg, sg_nents(sg),
873 SG_MITER_ATOMIC | SG_MITER_TO_SG);
874
875 while (sg_miter_next(&miter) && len > 0) {
876
877 int chunklen;
878
879 if (offset && offset >= miter.length) {
880 offset -= miter.length;
881 continue;
882 }
883
884 chunklen = min(miter.length - offset, len);
885 memset(miter.addr + offset, 0xFF, chunklen);
886 len -= chunklen;
887 offset = 0;
888 }
889
890 sg_miter_stop(&miter);
891 local_irq_restore(flags);
892
893 if (offset)
894 return -EFAULT;
895
896 if (extra)
897 memset(extra, 0xFF, sizeof(*extra));
898 return 0;
899 }
900
901 if (pba >= msb->block_count) {
902 pr_err("BUG: attempt to read beyond the end of the card at pba %d", pba);
903 return -EINVAL;
904 }
905
906 for (try = 1; try < 3; try++) {
907 msb->regs.param.block_address = cpu_to_be16(pba);
908 msb->regs.param.page_address = page;
909 msb->regs.param.cp = MEMSTICK_CP_PAGE;
910
911 msb->current_sg = sg;
912 msb->current_sg_offset = offset;
913 error = msb_run_state_machine(msb, h_msb_read_page);
914
915
916 if (error == -EUCLEAN) {
917 pr_notice("correctable error on pba %d, page %d",
918 pba, page);
919 error = 0;
920 }
921
922 if (!error && extra)
923 *extra = msb->regs.extra_data;
924
925 if (!error || msb_reset(msb, true))
926 break;
927
928 }
929
930
931 if (error == -EBADMSG) {
932 pr_err("uncorrectable error on read of pba %d, page %d",
933 pba, page);
934
935 if (msb->regs.extra_data.overwrite_flag &
936 MEMSTICK_OVERWRITE_PGST0)
937 msb_mark_page_bad(msb, pba, page);
938 return -EBADMSG;
939 }
940
941 if (error)
942 pr_err("read of pba %d, page %d failed with error %d",
943 pba, page, error);
944 return error;
945}
946
947
948static int msb_read_oob(struct msb_data *msb, u16 pba, u16 page,
949 struct ms_extra_data_register *extra)
950{
951 int error;
952
953 BUG_ON(!extra);
954 msb->regs.param.block_address = cpu_to_be16(pba);
955 msb->regs.param.page_address = page;
956 msb->regs.param.cp = MEMSTICK_CP_EXTRA;
957
958 if (pba > msb->block_count) {
959 pr_err("BUG: attempt to read beyond the end of card at pba %d", pba);
960 return -EINVAL;
961 }
962
963 error = msb_run_state_machine(msb, h_msb_read_page);
964 *extra = msb->regs.extra_data;
965
966 if (error == -EUCLEAN) {
967 pr_notice("correctable error on pba %d, page %d",
968 pba, page);
969 return 0;
970 }
971
972 return error;
973}
974
975
976static int msb_verify_block(struct msb_data *msb, u16 pba,
977 struct scatterlist *orig_sg, int offset)
978{
979 struct scatterlist sg;
980 int page = 0, error;
981
982 sg_init_one(&sg, msb->block_buffer, msb->block_size);
983
984 while (page < msb->pages_in_block) {
985
986 error = msb_read_page(msb, pba, page,
987 NULL, &sg, page * msb->page_size);
988 if (error)
989 return error;
990 page++;
991 }
992
993 if (msb_sg_compare_to_buffer(orig_sg, offset,
994 msb->block_buffer, msb->block_size))
995 return -EIO;
996 return 0;
997}
998
999
1000static int msb_write_block(struct msb_data *msb,
1001 u16 pba, u32 lba, struct scatterlist *sg, int offset)
1002{
1003 int error, current_try = 1;
1004 BUG_ON(sg->length < msb->page_size);
1005
1006 if (msb->read_only)
1007 return -EROFS;
1008
1009 if (pba == MS_BLOCK_INVALID) {
1010 pr_err(
1011 "BUG: write: attempt to write MS_BLOCK_INVALID block");
1012 return -EINVAL;
1013 }
1014
1015 if (pba >= msb->block_count || lba >= msb->logical_block_count) {
1016 pr_err(
1017 "BUG: write: attempt to write beyond the end of device");
1018 return -EINVAL;
1019 }
1020
1021 if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) {
1022 pr_err("BUG: write: lba zone mismatch");
1023 return -EINVAL;
1024 }
1025
1026 if (pba == msb->boot_block_locations[0] ||
1027 pba == msb->boot_block_locations[1]) {
1028 pr_err("BUG: write: attempt to write to boot blocks!");
1029 return -EINVAL;
1030 }
1031
1032 while (1) {
1033
1034 if (msb->read_only)
1035 return -EROFS;
1036
1037 msb->regs.param.cp = MEMSTICK_CP_BLOCK;
1038 msb->regs.param.page_address = 0;
1039 msb->regs.param.block_address = cpu_to_be16(pba);
1040
1041 msb->regs.extra_data.management_flag = 0xFF;
1042 msb->regs.extra_data.overwrite_flag = 0xF8;
1043 msb->regs.extra_data.logical_address = cpu_to_be16(lba);
1044
1045 msb->current_sg = sg;
1046 msb->current_sg_offset = offset;
1047 msb->current_page = 0;
1048
1049 error = msb_run_state_machine(msb, h_msb_write_block);
1050
1051
1052
1053
1054
1055
1056
1057 if (!error && (verify_writes ||
1058 !test_bit(pba, msb->erased_blocks_bitmap)))
1059 error = msb_verify_block(msb, pba, sg, offset);
1060
1061 if (!error)
1062 break;
1063
1064 if (current_try > 1 || msb_reset(msb, true))
1065 break;
1066
1067 pr_err("write failed, trying to erase the pba %d", pba);
1068 error = msb_erase_block(msb, pba);
1069 if (error)
1070 break;
1071
1072 current_try++;
1073 }
1074 return error;
1075}
1076
1077
1078static u16 msb_get_free_block(struct msb_data *msb, int zone)
1079{
1080 u16 pos;
1081 int pba = zone * MS_BLOCKS_IN_ZONE;
1082 int i;
1083
1084 get_random_bytes(&pos, sizeof(pos));
1085
1086 if (!msb->free_block_count[zone]) {
1087 pr_err("NO free blocks in the zone %d, to use for a write, (media is WORN out) switching to RO mode", zone);
1088 msb->read_only = true;
1089 return MS_BLOCK_INVALID;
1090 }
1091
1092 pos %= msb->free_block_count[zone];
1093
1094 dbg_verbose("have %d choices for a free block, selected randomally: %d",
1095 msb->free_block_count[zone], pos);
1096
1097 pba = find_next_zero_bit(msb->used_blocks_bitmap,
1098 msb->block_count, pba);
1099 for (i = 0; i < pos; ++i)
1100 pba = find_next_zero_bit(msb->used_blocks_bitmap,
1101 msb->block_count, pba + 1);
1102
1103 dbg_verbose("result of the free blocks scan: pba %d", pba);
1104
1105 if (pba == msb->block_count || (msb_get_zone_from_pba(pba)) != zone) {
1106 pr_err("BUG: cant get a free block");
1107 msb->read_only = true;
1108 return MS_BLOCK_INVALID;
1109 }
1110
1111 msb_mark_block_used(msb, pba);
1112 return pba;
1113}
1114
1115static int msb_update_block(struct msb_data *msb, u16 lba,
1116 struct scatterlist *sg, int offset)
1117{
1118 u16 pba, new_pba;
1119 int error, try;
1120
1121 pba = msb->lba_to_pba_table[lba];
1122 dbg_verbose("start of a block update at lba %d, pba %d", lba, pba);
1123
1124 if (pba != MS_BLOCK_INVALID) {
1125 dbg_verbose("setting the update flag on the block");
1126 msb_set_overwrite_flag(msb, pba, 0,
1127 0xFF & ~MEMSTICK_OVERWRITE_UDST);
1128 }
1129
1130 for (try = 0; try < 3; try++) {
1131 new_pba = msb_get_free_block(msb,
1132 msb_get_zone_from_lba(lba));
1133
1134 if (new_pba == MS_BLOCK_INVALID) {
1135 error = -EIO;
1136 goto out;
1137 }
1138
1139 dbg_verbose("block update: writing updated block to the pba %d",
1140 new_pba);
1141 error = msb_write_block(msb, new_pba, lba, sg, offset);
1142 if (error == -EBADMSG) {
1143 msb_mark_bad(msb, new_pba);
1144 continue;
1145 }
1146
1147 if (error)
1148 goto out;
1149
1150 dbg_verbose("block update: erasing the old block");
1151 msb_erase_block(msb, pba);
1152 msb->lba_to_pba_table[lba] = new_pba;
1153 return 0;
1154 }
1155out:
1156 if (error) {
1157 pr_err("block update error after %d tries, switching to r/o mode", try);
1158 msb->read_only = true;
1159 }
1160 return error;
1161}
1162
1163
1164static void msb_fix_boot_page_endianness(struct ms_boot_page *p)
1165{
1166 p->header.block_id = be16_to_cpu(p->header.block_id);
1167 p->header.format_reserved = be16_to_cpu(p->header.format_reserved);
1168 p->entry.disabled_block.start_addr
1169 = be32_to_cpu(p->entry.disabled_block.start_addr);
1170 p->entry.disabled_block.data_size
1171 = be32_to_cpu(p->entry.disabled_block.data_size);
1172 p->entry.cis_idi.start_addr
1173 = be32_to_cpu(p->entry.cis_idi.start_addr);
1174 p->entry.cis_idi.data_size
1175 = be32_to_cpu(p->entry.cis_idi.data_size);
1176 p->attr.block_size = be16_to_cpu(p->attr.block_size);
1177 p->attr.number_of_blocks = be16_to_cpu(p->attr.number_of_blocks);
1178 p->attr.number_of_effective_blocks
1179 = be16_to_cpu(p->attr.number_of_effective_blocks);
1180 p->attr.page_size = be16_to_cpu(p->attr.page_size);
1181 p->attr.memory_manufacturer_code
1182 = be16_to_cpu(p->attr.memory_manufacturer_code);
1183 p->attr.memory_device_code = be16_to_cpu(p->attr.memory_device_code);
1184 p->attr.implemented_capacity
1185 = be16_to_cpu(p->attr.implemented_capacity);
1186 p->attr.controller_number = be16_to_cpu(p->attr.controller_number);
1187 p->attr.controller_function = be16_to_cpu(p->attr.controller_function);
1188}
1189
1190static int msb_read_boot_blocks(struct msb_data *msb)
1191{
1192 int pba = 0;
1193 struct scatterlist sg;
1194 struct ms_extra_data_register extra;
1195 struct ms_boot_page *page;
1196
1197 msb->boot_block_locations[0] = MS_BLOCK_INVALID;
1198 msb->boot_block_locations[1] = MS_BLOCK_INVALID;
1199 msb->boot_block_count = 0;
1200
1201 dbg_verbose("Start of a scan for the boot blocks");
1202
1203 if (!msb->boot_page) {
1204 page = kmalloc_array(2, sizeof(struct ms_boot_page),
1205 GFP_KERNEL);
1206 if (!page)
1207 return -ENOMEM;
1208
1209 msb->boot_page = page;
1210 } else
1211 page = msb->boot_page;
1212
1213 msb->block_count = MS_BLOCK_MAX_BOOT_ADDR;
1214
1215 for (pba = 0; pba < MS_BLOCK_MAX_BOOT_ADDR; pba++) {
1216
1217 sg_init_one(&sg, page, sizeof(*page));
1218 if (msb_read_page(msb, pba, 0, &extra, &sg, 0)) {
1219 dbg("boot scan: can't read pba %d", pba);
1220 continue;
1221 }
1222
1223 if (extra.management_flag & MEMSTICK_MANAGEMENT_SYSFLG) {
1224 dbg("management flag doesn't indicate boot block %d",
1225 pba);
1226 continue;
1227 }
1228
1229 if (be16_to_cpu(page->header.block_id) != MS_BLOCK_BOOT_ID) {
1230 dbg("the pba at %d doesn' contain boot block ID", pba);
1231 continue;
1232 }
1233
1234 msb_fix_boot_page_endianness(page);
1235 msb->boot_block_locations[msb->boot_block_count] = pba;
1236
1237 page++;
1238 msb->boot_block_count++;
1239
1240 if (msb->boot_block_count == 2)
1241 break;
1242 }
1243
1244 if (!msb->boot_block_count) {
1245 pr_err("media doesn't contain master page, aborting");
1246 return -EIO;
1247 }
1248
1249 dbg_verbose("End of scan for boot blocks");
1250 return 0;
1251}
1252
1253static int msb_read_bad_block_table(struct msb_data *msb, int block_nr)
1254{
1255 struct ms_boot_page *boot_block;
1256 struct scatterlist sg;
1257 u16 *buffer = NULL;
1258 int offset = 0;
1259 int i, error = 0;
1260 int data_size, data_offset, page, page_offset, size_to_read;
1261 u16 pba;
1262
1263 BUG_ON(block_nr > 1);
1264 boot_block = &msb->boot_page[block_nr];
1265 pba = msb->boot_block_locations[block_nr];
1266
1267 if (msb->boot_block_locations[block_nr] == MS_BLOCK_INVALID)
1268 return -EINVAL;
1269
1270 data_size = boot_block->entry.disabled_block.data_size;
1271 data_offset = sizeof(struct ms_boot_page) +
1272 boot_block->entry.disabled_block.start_addr;
1273 if (!data_size)
1274 return 0;
1275
1276 page = data_offset / msb->page_size;
1277 page_offset = data_offset % msb->page_size;
1278 size_to_read =
1279 DIV_ROUND_UP(data_size + page_offset, msb->page_size) *
1280 msb->page_size;
1281
1282 dbg("reading bad block of boot block at pba %d, offset %d len %d",
1283 pba, data_offset, data_size);
1284
1285 buffer = kzalloc(size_to_read, GFP_KERNEL);
1286 if (!buffer)
1287 return -ENOMEM;
1288
1289
1290 sg_init_one(&sg, buffer, size_to_read);
1291
1292 while (offset < size_to_read) {
1293 error = msb_read_page(msb, pba, page, NULL, &sg, offset);
1294 if (error)
1295 goto out;
1296
1297 page++;
1298 offset += msb->page_size;
1299
1300 if (page == msb->pages_in_block) {
1301 pr_err(
1302 "bad block table extends beyond the boot block");
1303 break;
1304 }
1305 }
1306
1307
1308 for (i = page_offset; i < data_size / sizeof(u16); i++) {
1309
1310 u16 bad_block = be16_to_cpu(buffer[i]);
1311
1312 if (bad_block >= msb->block_count) {
1313 dbg("bad block table contains invalid block %d",
1314 bad_block);
1315 continue;
1316 }
1317
1318 if (test_bit(bad_block, msb->used_blocks_bitmap)) {
1319 dbg("duplicate bad block %d in the table",
1320 bad_block);
1321 continue;
1322 }
1323
1324 dbg("block %d is marked as factory bad", bad_block);
1325 msb_mark_block_used(msb, bad_block);
1326 }
1327out:
1328 kfree(buffer);
1329 return error;
1330}
1331
1332static int msb_ftl_initialize(struct msb_data *msb)
1333{
1334 int i;
1335
1336 if (msb->ftl_initialized)
1337 return 0;
1338
1339 msb->zone_count = msb->block_count / MS_BLOCKS_IN_ZONE;
1340 msb->logical_block_count = msb->zone_count * 496 - 2;
1341
1342 msb->used_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
1343 msb->erased_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
1344 msb->lba_to_pba_table =
1345 kmalloc_array(msb->logical_block_count, sizeof(u16),
1346 GFP_KERNEL);
1347
1348 if (!msb->used_blocks_bitmap || !msb->lba_to_pba_table ||
1349 !msb->erased_blocks_bitmap) {
1350 kfree(msb->used_blocks_bitmap);
1351 kfree(msb->lba_to_pba_table);
1352 kfree(msb->erased_blocks_bitmap);
1353 return -ENOMEM;
1354 }
1355
1356 for (i = 0; i < msb->zone_count; i++)
1357 msb->free_block_count[i] = MS_BLOCKS_IN_ZONE;
1358
1359 memset(msb->lba_to_pba_table, MS_BLOCK_INVALID,
1360 msb->logical_block_count * sizeof(u16));
1361
1362 dbg("initial FTL tables created. Zone count = %d, Logical block count = %d",
1363 msb->zone_count, msb->logical_block_count);
1364
1365 msb->ftl_initialized = true;
1366 return 0;
1367}
1368
1369static int msb_ftl_scan(struct msb_data *msb)
1370{
1371 u16 pba, lba, other_block;
1372 u8 overwrite_flag, management_flag, other_overwrite_flag;
1373 int error;
1374 struct ms_extra_data_register extra;
1375 u8 *overwrite_flags = kzalloc(msb->block_count, GFP_KERNEL);
1376
1377 if (!overwrite_flags)
1378 return -ENOMEM;
1379
1380 dbg("Start of media scanning");
1381 for (pba = 0; pba < msb->block_count; pba++) {
1382
1383 if (pba == msb->boot_block_locations[0] ||
1384 pba == msb->boot_block_locations[1]) {
1385 dbg_verbose("pba %05d -> [boot block]", pba);
1386 msb_mark_block_used(msb, pba);
1387 continue;
1388 }
1389
1390 if (test_bit(pba, msb->used_blocks_bitmap)) {
1391 dbg_verbose("pba %05d -> [factory bad]", pba);
1392 continue;
1393 }
1394
1395 memset(&extra, 0, sizeof(extra));
1396 error = msb_read_oob(msb, pba, 0, &extra);
1397
1398
1399 if (error == -EBADMSG) {
1400 pr_notice(
1401 "oob of pba %d damaged, will try to erase it", pba);
1402 msb_mark_block_used(msb, pba);
1403 msb_erase_block(msb, pba);
1404 continue;
1405 } else if (error) {
1406 pr_err("unknown error %d on read of oob of pba %d - aborting",
1407 error, pba);
1408
1409 kfree(overwrite_flags);
1410 return error;
1411 }
1412
1413 lba = be16_to_cpu(extra.logical_address);
1414 management_flag = extra.management_flag;
1415 overwrite_flag = extra.overwrite_flag;
1416 overwrite_flags[pba] = overwrite_flag;
1417
1418
1419 if (!(overwrite_flag & MEMSTICK_OVERWRITE_BKST)) {
1420 dbg("pba %05d -> [BAD]", pba);
1421 msb_mark_block_used(msb, pba);
1422 continue;
1423 }
1424
1425
1426 if ((management_flag & MEMSTICK_MANAGEMENT_FLAG_NORMAL) !=
1427 MEMSTICK_MANAGEMENT_FLAG_NORMAL) {
1428 dbg("pba %05d -> [reserved management flag %02x]",
1429 pba, management_flag);
1430 msb_mark_block_used(msb, pba);
1431 continue;
1432 }
1433
1434
1435 if (!(management_flag & MEMSTICK_MANAGEMENT_ATFLG)) {
1436 dbg("pba %05d -> [temp table] - will erase", pba);
1437
1438 msb_mark_block_used(msb, pba);
1439 msb_erase_block(msb, pba);
1440 continue;
1441 }
1442
1443 if (lba == MS_BLOCK_INVALID) {
1444 dbg_verbose("pba %05d -> [free]", pba);
1445 continue;
1446 }
1447
1448 msb_mark_block_used(msb, pba);
1449
1450
1451 if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) {
1452 pr_notice("pba %05d -> [bad lba %05d] - will erase",
1453 pba, lba);
1454 msb_erase_block(msb, pba);
1455 continue;
1456 }
1457
1458
1459 if (msb->lba_to_pba_table[lba] == MS_BLOCK_INVALID) {
1460 dbg_verbose("pba %05d -> [lba %05d]", pba, lba);
1461 msb->lba_to_pba_table[lba] = pba;
1462 continue;
1463 }
1464
1465 other_block = msb->lba_to_pba_table[lba];
1466 other_overwrite_flag = overwrite_flags[other_block];
1467
1468 pr_notice("Collision between pba %d and pba %d",
1469 pba, other_block);
1470
1471 if (!(overwrite_flag & MEMSTICK_OVERWRITE_UDST)) {
1472 pr_notice("pba %d is marked as stable, use it", pba);
1473 msb_erase_block(msb, other_block);
1474 msb->lba_to_pba_table[lba] = pba;
1475 continue;
1476 }
1477
1478 if (!(other_overwrite_flag & MEMSTICK_OVERWRITE_UDST)) {
1479 pr_notice("pba %d is marked as stable, use it",
1480 other_block);
1481 msb_erase_block(msb, pba);
1482 continue;
1483 }
1484
1485 pr_notice("collision between blocks %d and %d, without stable flag set on both, erasing pba %d",
1486 pba, other_block, other_block);
1487
1488 msb_erase_block(msb, other_block);
1489 msb->lba_to_pba_table[lba] = pba;
1490 }
1491
1492 dbg("End of media scanning");
1493 kfree(overwrite_flags);
1494 return 0;
1495}
1496
1497static void msb_cache_flush_timer(struct timer_list *t)
1498{
1499 struct msb_data *msb = from_timer(msb, t, cache_flush_timer);
1500 msb->need_flush_cache = true;
1501 queue_work(msb->io_queue, &msb->io_work);
1502}
1503
1504
1505static void msb_cache_discard(struct msb_data *msb)
1506{
1507 if (msb->cache_block_lba == MS_BLOCK_INVALID)
1508 return;
1509
1510 del_timer_sync(&msb->cache_flush_timer);
1511
1512 dbg_verbose("Discarding the write cache");
1513 msb->cache_block_lba = MS_BLOCK_INVALID;
1514 bitmap_zero(&msb->valid_cache_bitmap, msb->pages_in_block);
1515}
1516
1517static int msb_cache_init(struct msb_data *msb)
1518{
1519 timer_setup(&msb->cache_flush_timer, msb_cache_flush_timer, 0);
1520
1521 if (!msb->cache)
1522 msb->cache = kzalloc(msb->block_size, GFP_KERNEL);
1523 if (!msb->cache)
1524 return -ENOMEM;
1525
1526 msb_cache_discard(msb);
1527 return 0;
1528}
1529
1530static int msb_cache_flush(struct msb_data *msb)
1531{
1532 struct scatterlist sg;
1533 struct ms_extra_data_register extra;
1534 int page, offset, error;
1535 u16 pba, lba;
1536
1537 if (msb->read_only)
1538 return -EROFS;
1539
1540 if (msb->cache_block_lba == MS_BLOCK_INVALID)
1541 return 0;
1542
1543 lba = msb->cache_block_lba;
1544 pba = msb->lba_to_pba_table[lba];
1545
1546 dbg_verbose("Flushing the write cache of pba %d (LBA %d)",
1547 pba, msb->cache_block_lba);
1548
1549 sg_init_one(&sg, msb->cache , msb->block_size);
1550
1551
1552 for (page = 0; page < msb->pages_in_block; page++) {
1553
1554 if (test_bit(page, &msb->valid_cache_bitmap))
1555 continue;
1556
1557 offset = page * msb->page_size;
1558
1559 dbg_verbose("reading non-present sector %d of cache block %d",
1560 page, lba);
1561 error = msb_read_page(msb, pba, page, &extra, &sg, offset);
1562
1563
1564 if (error == -EBADMSG) {
1565 pr_err("read error on sector %d, contents probably damaged", page);
1566 continue;
1567 }
1568
1569 if (error)
1570 return error;
1571
1572 if ((extra.overwrite_flag & MEMSTICK_OV_PG_NORMAL) !=
1573 MEMSTICK_OV_PG_NORMAL) {
1574 dbg("page %d is marked as bad", page);
1575 continue;
1576 }
1577
1578 set_bit(page, &msb->valid_cache_bitmap);
1579 }
1580
1581
1582 error = msb_update_block(msb, msb->cache_block_lba, &sg, 0);
1583 pba = msb->lba_to_pba_table[msb->cache_block_lba];
1584
1585
1586 if (!error) {
1587 for (page = 0; page < msb->pages_in_block; page++) {
1588
1589 if (test_bit(page, &msb->valid_cache_bitmap))
1590 continue;
1591
1592 dbg("marking page %d as containing damaged data",
1593 page);
1594 msb_set_overwrite_flag(msb,
1595 pba , page, 0xFF & ~MEMSTICK_OV_PG_NORMAL);
1596 }
1597 }
1598
1599 msb_cache_discard(msb);
1600 return error;
1601}
1602
1603static int msb_cache_write(struct msb_data *msb, int lba,
1604 int page, bool add_to_cache_only, struct scatterlist *sg, int offset)
1605{
1606 int error;
1607 struct scatterlist sg_tmp[10];
1608
1609 if (msb->read_only)
1610 return -EROFS;
1611
1612 if (msb->cache_block_lba == MS_BLOCK_INVALID ||
1613 lba != msb->cache_block_lba)
1614 if (add_to_cache_only)
1615 return 0;
1616
1617
1618 if (msb->cache_block_lba != MS_BLOCK_INVALID &&
1619 lba != msb->cache_block_lba) {
1620 dbg_verbose("first flush the cache");
1621 error = msb_cache_flush(msb);
1622 if (error)
1623 return error;
1624 }
1625
1626 if (msb->cache_block_lba == MS_BLOCK_INVALID) {
1627 msb->cache_block_lba = lba;
1628 mod_timer(&msb->cache_flush_timer,
1629 jiffies + msecs_to_jiffies(cache_flush_timeout));
1630 }
1631
1632 dbg_verbose("Write of LBA %d page %d to cache ", lba, page);
1633
1634 sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp));
1635 msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp), offset, msb->page_size);
1636
1637 sg_copy_to_buffer(sg_tmp, sg_nents(sg_tmp),
1638 msb->cache + page * msb->page_size, msb->page_size);
1639
1640 set_bit(page, &msb->valid_cache_bitmap);
1641 return 0;
1642}
1643
1644static int msb_cache_read(struct msb_data *msb, int lba,
1645 int page, struct scatterlist *sg, int offset)
1646{
1647 int pba = msb->lba_to_pba_table[lba];
1648 struct scatterlist sg_tmp[10];
1649 int error = 0;
1650
1651 if (lba == msb->cache_block_lba &&
1652 test_bit(page, &msb->valid_cache_bitmap)) {
1653
1654 dbg_verbose("Read of LBA %d (pba %d) sector %d from cache",
1655 lba, pba, page);
1656
1657 sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp));
1658 msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp),
1659 offset, msb->page_size);
1660 sg_copy_from_buffer(sg_tmp, sg_nents(sg_tmp),
1661 msb->cache + msb->page_size * page,
1662 msb->page_size);
1663 } else {
1664 dbg_verbose("Read of LBA %d (pba %d) sector %d from device",
1665 lba, pba, page);
1666
1667 error = msb_read_page(msb, pba, page, NULL, sg, offset);
1668 if (error)
1669 return error;
1670
1671 msb_cache_write(msb, lba, page, true, sg, offset);
1672 }
1673 return error;
1674}
1675
1676
1677
1678
1679
1680
1681
1682static const struct chs_entry chs_table[] = {
1683
1684 { 4, 16, 247, 2 },
1685 { 8, 16, 495, 2 },
1686 { 16, 16, 495, 4 },
1687 { 32, 16, 991, 4 },
1688 { 64, 16, 991, 8 },
1689 {128, 16, 991, 16 },
1690 { 0 }
1691};
1692
1693
1694static int msb_init_card(struct memstick_dev *card)
1695{
1696 struct msb_data *msb = memstick_get_drvdata(card);
1697 struct memstick_host *host = card->host;
1698 struct ms_boot_page *boot_block;
1699 int error = 0, i, raw_size_in_megs;
1700
1701 msb->caps = 0;
1702
1703 if (card->id.class >= MEMSTICK_CLASS_ROM &&
1704 card->id.class <= MEMSTICK_CLASS_ROM)
1705 msb->read_only = true;
1706
1707 msb->state = -1;
1708 error = msb_reset(msb, false);
1709 if (error)
1710 return error;
1711
1712
1713
1714
1715 if (host->caps & MEMSTICK_CAP_PAR4)
1716 msb_switch_to_parallel(msb);
1717
1718 msb->page_size = sizeof(struct ms_boot_page);
1719
1720
1721 error = msb_read_boot_blocks(msb);
1722 if (error)
1723 return -EIO;
1724
1725 boot_block = &msb->boot_page[0];
1726
1727
1728 msb->block_count = boot_block->attr.number_of_blocks;
1729 msb->page_size = boot_block->attr.page_size;
1730
1731 msb->pages_in_block = boot_block->attr.block_size * 2;
1732 msb->block_size = msb->page_size * msb->pages_in_block;
1733
1734 if (msb->page_size > PAGE_SIZE) {
1735
1736 dbg("device page %d size isn't supported", msb->page_size);
1737 return -EINVAL;
1738 }
1739
1740 msb->block_buffer = kzalloc(msb->block_size, GFP_KERNEL);
1741 if (!msb->block_buffer)
1742 return -ENOMEM;
1743
1744 raw_size_in_megs = (msb->block_size * msb->block_count) >> 20;
1745
1746 for (i = 0; chs_table[i].size; i++) {
1747
1748 if (chs_table[i].size != raw_size_in_megs)
1749 continue;
1750
1751 msb->geometry.cylinders = chs_table[i].cyl;
1752 msb->geometry.heads = chs_table[i].head;
1753 msb->geometry.sectors = chs_table[i].sec;
1754 break;
1755 }
1756
1757 if (boot_block->attr.transfer_supporting == 1)
1758 msb->caps |= MEMSTICK_CAP_PAR4;
1759
1760 if (boot_block->attr.device_type & 0x03)
1761 msb->read_only = true;
1762
1763 dbg("Total block count = %d", msb->block_count);
1764 dbg("Each block consists of %d pages", msb->pages_in_block);
1765 dbg("Page size = %d bytes", msb->page_size);
1766 dbg("Parallel mode supported: %d", !!(msb->caps & MEMSTICK_CAP_PAR4));
1767 dbg("Read only: %d", msb->read_only);
1768
1769#if 0
1770
1771 if (host->caps & msb->caps & MEMSTICK_CAP_PAR4)
1772 msb_switch_to_parallel(msb);
1773#endif
1774
1775 error = msb_cache_init(msb);
1776 if (error)
1777 return error;
1778
1779 error = msb_ftl_initialize(msb);
1780 if (error)
1781 return error;
1782
1783
1784
1785 error = msb_read_bad_block_table(msb, 0);
1786
1787 if (error && error != -ENOMEM) {
1788 dbg("failed to read bad block table from primary boot block, trying from backup");
1789 error = msb_read_bad_block_table(msb, 1);
1790 }
1791
1792 if (error)
1793 return error;
1794
1795
1796 error = msb_ftl_scan(msb);
1797 if (error) {
1798 pr_err("Scan of media failed");
1799 return error;
1800 }
1801
1802 return 0;
1803
1804}
1805
1806static int msb_do_write_request(struct msb_data *msb, int lba,
1807 int page, struct scatterlist *sg, size_t len, int *sucessfuly_written)
1808{
1809 int error = 0;
1810 off_t offset = 0;
1811 *sucessfuly_written = 0;
1812
1813 while (offset < len) {
1814 if (page == 0 && len - offset >= msb->block_size) {
1815
1816 if (msb->cache_block_lba == lba)
1817 msb_cache_discard(msb);
1818
1819 dbg_verbose("Writing whole lba %d", lba);
1820 error = msb_update_block(msb, lba, sg, offset);
1821 if (error)
1822 return error;
1823
1824 offset += msb->block_size;
1825 *sucessfuly_written += msb->block_size;
1826 lba++;
1827 continue;
1828 }
1829
1830 error = msb_cache_write(msb, lba, page, false, sg, offset);
1831 if (error)
1832 return error;
1833
1834 offset += msb->page_size;
1835 *sucessfuly_written += msb->page_size;
1836
1837 page++;
1838 if (page == msb->pages_in_block) {
1839 page = 0;
1840 lba++;
1841 }
1842 }
1843 return 0;
1844}
1845
1846static int msb_do_read_request(struct msb_data *msb, int lba,
1847 int page, struct scatterlist *sg, int len, int *sucessfuly_read)
1848{
1849 int error = 0;
1850 int offset = 0;
1851 *sucessfuly_read = 0;
1852
1853 while (offset < len) {
1854
1855 error = msb_cache_read(msb, lba, page, sg, offset);
1856 if (error)
1857 return error;
1858
1859 offset += msb->page_size;
1860 *sucessfuly_read += msb->page_size;
1861
1862 page++;
1863 if (page == msb->pages_in_block) {
1864 page = 0;
1865 lba++;
1866 }
1867 }
1868 return 0;
1869}
1870
1871static void msb_io_work(struct work_struct *work)
1872{
1873 struct msb_data *msb = container_of(work, struct msb_data, io_work);
1874 int page, error, len;
1875 sector_t lba;
1876 unsigned long flags;
1877 struct scatterlist *sg = msb->prealloc_sg;
1878
1879 dbg_verbose("IO: work started");
1880
1881 while (1) {
1882 spin_lock_irqsave(&msb->q_lock, flags);
1883
1884 if (msb->need_flush_cache) {
1885 msb->need_flush_cache = false;
1886 spin_unlock_irqrestore(&msb->q_lock, flags);
1887 msb_cache_flush(msb);
1888 continue;
1889 }
1890
1891 if (!msb->req) {
1892 msb->req = blk_fetch_request(msb->queue);
1893 if (!msb->req) {
1894 dbg_verbose("IO: no more requests exiting");
1895 spin_unlock_irqrestore(&msb->q_lock, flags);
1896 return;
1897 }
1898 }
1899
1900 spin_unlock_irqrestore(&msb->q_lock, flags);
1901
1902
1903 if (!msb->req)
1904 return;
1905
1906
1907 dbg_verbose("IO: processing new request");
1908 blk_rq_map_sg(msb->queue, msb->req, sg);
1909
1910 lba = blk_rq_pos(msb->req);
1911
1912 sector_div(lba, msb->page_size / 512);
1913 page = sector_div(lba, msb->pages_in_block);
1914
1915 if (rq_data_dir(msb->req) == READ)
1916 error = msb_do_read_request(msb, lba, page, sg,
1917 blk_rq_bytes(msb->req), &len);
1918 else
1919 error = msb_do_write_request(msb, lba, page, sg,
1920 blk_rq_bytes(msb->req), &len);
1921
1922 spin_lock_irqsave(&msb->q_lock, flags);
1923
1924 if (len)
1925 if (!__blk_end_request(msb->req, BLK_STS_OK, len))
1926 msb->req = NULL;
1927
1928 if (error && msb->req) {
1929 blk_status_t ret = errno_to_blk_status(error);
1930 dbg_verbose("IO: ending one sector of the request with error");
1931 if (!__blk_end_request(msb->req, ret, msb->page_size))
1932 msb->req = NULL;
1933 }
1934
1935 if (msb->req)
1936 dbg_verbose("IO: request still pending");
1937
1938 spin_unlock_irqrestore(&msb->q_lock, flags);
1939 }
1940}
1941
1942static DEFINE_IDR(msb_disk_idr);
1943static DEFINE_MUTEX(msb_disk_lock);
1944
1945static int msb_bd_open(struct block_device *bdev, fmode_t mode)
1946{
1947 struct gendisk *disk = bdev->bd_disk;
1948 struct msb_data *msb = disk->private_data;
1949
1950 dbg_verbose("block device open");
1951
1952 mutex_lock(&msb_disk_lock);
1953
1954 if (msb && msb->card)
1955 msb->usage_count++;
1956
1957 mutex_unlock(&msb_disk_lock);
1958 return 0;
1959}
1960
1961static void msb_data_clear(struct msb_data *msb)
1962{
1963 kfree(msb->boot_page);
1964 kfree(msb->used_blocks_bitmap);
1965 kfree(msb->lba_to_pba_table);
1966 kfree(msb->cache);
1967 msb->card = NULL;
1968}
1969
1970static int msb_disk_release(struct gendisk *disk)
1971{
1972 struct msb_data *msb = disk->private_data;
1973
1974 dbg_verbose("block device release");
1975 mutex_lock(&msb_disk_lock);
1976
1977 if (msb) {
1978 if (msb->usage_count)
1979 msb->usage_count--;
1980
1981 if (!msb->usage_count) {
1982 disk->private_data = NULL;
1983 idr_remove(&msb_disk_idr, msb->disk_id);
1984 put_disk(disk);
1985 kfree(msb);
1986 }
1987 }
1988 mutex_unlock(&msb_disk_lock);
1989 return 0;
1990}
1991
1992static void msb_bd_release(struct gendisk *disk, fmode_t mode)
1993{
1994 msb_disk_release(disk);
1995}
1996
1997static int msb_bd_getgeo(struct block_device *bdev,
1998 struct hd_geometry *geo)
1999{
2000 struct msb_data *msb = bdev->bd_disk->private_data;
2001 *geo = msb->geometry;
2002 return 0;
2003}
2004
2005static void msb_submit_req(struct request_queue *q)
2006{
2007 struct memstick_dev *card = q->queuedata;
2008 struct msb_data *msb = memstick_get_drvdata(card);
2009 struct request *req = NULL;
2010
2011 dbg_verbose("Submit request");
2012
2013 if (msb->card_dead) {
2014 dbg("Refusing requests on removed card");
2015
2016 WARN_ON(!msb->io_queue_stopped);
2017
2018 while ((req = blk_fetch_request(q)) != NULL)
2019 __blk_end_request_all(req, BLK_STS_IOERR);
2020 return;
2021 }
2022
2023 if (msb->req)
2024 return;
2025
2026 if (!msb->io_queue_stopped)
2027 queue_work(msb->io_queue, &msb->io_work);
2028}
2029
2030static int msb_check_card(struct memstick_dev *card)
2031{
2032 struct msb_data *msb = memstick_get_drvdata(card);
2033 return (msb->card_dead == 0);
2034}
2035
2036static void msb_stop(struct memstick_dev *card)
2037{
2038 struct msb_data *msb = memstick_get_drvdata(card);
2039 unsigned long flags;
2040
2041 dbg("Stopping all msblock IO");
2042
2043 spin_lock_irqsave(&msb->q_lock, flags);
2044 blk_stop_queue(msb->queue);
2045 msb->io_queue_stopped = true;
2046 spin_unlock_irqrestore(&msb->q_lock, flags);
2047
2048 del_timer_sync(&msb->cache_flush_timer);
2049 flush_workqueue(msb->io_queue);
2050
2051 if (msb->req) {
2052 spin_lock_irqsave(&msb->q_lock, flags);
2053 blk_requeue_request(msb->queue, msb->req);
2054 msb->req = NULL;
2055 spin_unlock_irqrestore(&msb->q_lock, flags);
2056 }
2057
2058}
2059
2060static void msb_start(struct memstick_dev *card)
2061{
2062 struct msb_data *msb = memstick_get_drvdata(card);
2063 unsigned long flags;
2064
2065 dbg("Resuming IO from msblock");
2066
2067 msb_invalidate_reg_window(msb);
2068
2069 spin_lock_irqsave(&msb->q_lock, flags);
2070 if (!msb->io_queue_stopped || msb->card_dead) {
2071 spin_unlock_irqrestore(&msb->q_lock, flags);
2072 return;
2073 }
2074 spin_unlock_irqrestore(&msb->q_lock, flags);
2075
2076
2077 msb->need_flush_cache = true;
2078 msb->io_queue_stopped = false;
2079
2080 spin_lock_irqsave(&msb->q_lock, flags);
2081 blk_start_queue(msb->queue);
2082 spin_unlock_irqrestore(&msb->q_lock, flags);
2083
2084 queue_work(msb->io_queue, &msb->io_work);
2085
2086}
2087
2088static const struct block_device_operations msb_bdops = {
2089 .open = msb_bd_open,
2090 .release = msb_bd_release,
2091 .getgeo = msb_bd_getgeo,
2092 .owner = THIS_MODULE
2093};
2094
2095
2096static int msb_init_disk(struct memstick_dev *card)
2097{
2098 struct msb_data *msb = memstick_get_drvdata(card);
2099 int rc;
2100 unsigned long capacity;
2101
2102 mutex_lock(&msb_disk_lock);
2103 msb->disk_id = idr_alloc(&msb_disk_idr, card, 0, 256, GFP_KERNEL);
2104 mutex_unlock(&msb_disk_lock);
2105
2106 if (msb->disk_id < 0)
2107 return msb->disk_id;
2108
2109 msb->disk = alloc_disk(0);
2110 if (!msb->disk) {
2111 rc = -ENOMEM;
2112 goto out_release_id;
2113 }
2114
2115 msb->queue = blk_init_queue(msb_submit_req, &msb->q_lock);
2116 if (!msb->queue) {
2117 rc = -ENOMEM;
2118 goto out_put_disk;
2119 }
2120
2121 msb->queue->queuedata = card;
2122
2123 blk_queue_max_hw_sectors(msb->queue, MS_BLOCK_MAX_PAGES);
2124 blk_queue_max_segments(msb->queue, MS_BLOCK_MAX_SEGS);
2125 blk_queue_max_segment_size(msb->queue,
2126 MS_BLOCK_MAX_PAGES * msb->page_size);
2127 blk_queue_logical_block_size(msb->queue, msb->page_size);
2128
2129 sprintf(msb->disk->disk_name, "msblk%d", msb->disk_id);
2130 msb->disk->fops = &msb_bdops;
2131 msb->disk->private_data = msb;
2132 msb->disk->queue = msb->queue;
2133 msb->disk->flags |= GENHD_FL_EXT_DEVT;
2134
2135 capacity = msb->pages_in_block * msb->logical_block_count;
2136 capacity *= (msb->page_size / 512);
2137 set_capacity(msb->disk, capacity);
2138 dbg("Set total disk size to %lu sectors", capacity);
2139
2140 msb->usage_count = 1;
2141 msb->io_queue = alloc_ordered_workqueue("ms_block", WQ_MEM_RECLAIM);
2142 INIT_WORK(&msb->io_work, msb_io_work);
2143 sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
2144
2145 if (msb->read_only)
2146 set_disk_ro(msb->disk, 1);
2147
2148 msb_start(card);
2149 device_add_disk(&card->dev, msb->disk);
2150 dbg("Disk added");
2151 return 0;
2152
2153out_put_disk:
2154 put_disk(msb->disk);
2155out_release_id:
2156 mutex_lock(&msb_disk_lock);
2157 idr_remove(&msb_disk_idr, msb->disk_id);
2158 mutex_unlock(&msb_disk_lock);
2159 return rc;
2160}
2161
2162static int msb_probe(struct memstick_dev *card)
2163{
2164 struct msb_data *msb;
2165 int rc = 0;
2166
2167 msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL);
2168 if (!msb)
2169 return -ENOMEM;
2170 memstick_set_drvdata(card, msb);
2171 msb->card = card;
2172 spin_lock_init(&msb->q_lock);
2173
2174 rc = msb_init_card(card);
2175 if (rc)
2176 goto out_free;
2177
2178 rc = msb_init_disk(card);
2179 if (!rc) {
2180 card->check = msb_check_card;
2181 card->stop = msb_stop;
2182 card->start = msb_start;
2183 return 0;
2184 }
2185out_free:
2186 memstick_set_drvdata(card, NULL);
2187 msb_data_clear(msb);
2188 kfree(msb);
2189 return rc;
2190}
2191
2192static void msb_remove(struct memstick_dev *card)
2193{
2194 struct msb_data *msb = memstick_get_drvdata(card);
2195 unsigned long flags;
2196
2197 if (!msb->io_queue_stopped)
2198 msb_stop(card);
2199
2200 dbg("Removing the disk device");
2201
2202
2203 spin_lock_irqsave(&msb->q_lock, flags);
2204 msb->card_dead = true;
2205 blk_start_queue(msb->queue);
2206 spin_unlock_irqrestore(&msb->q_lock, flags);
2207
2208
2209 del_gendisk(msb->disk);
2210 blk_cleanup_queue(msb->queue);
2211 msb->queue = NULL;
2212
2213 mutex_lock(&msb_disk_lock);
2214 msb_data_clear(msb);
2215 mutex_unlock(&msb_disk_lock);
2216
2217 msb_disk_release(msb->disk);
2218 memstick_set_drvdata(card, NULL);
2219}
2220
2221#ifdef CONFIG_PM
2222
2223static int msb_suspend(struct memstick_dev *card, pm_message_t state)
2224{
2225 msb_stop(card);
2226 return 0;
2227}
2228
2229static int msb_resume(struct memstick_dev *card)
2230{
2231 struct msb_data *msb = memstick_get_drvdata(card);
2232 struct msb_data *new_msb = NULL;
2233 bool card_dead = true;
2234
2235#ifndef CONFIG_MEMSTICK_UNSAFE_RESUME
2236 msb->card_dead = true;
2237 return 0;
2238#endif
2239 mutex_lock(&card->host->lock);
2240
2241 new_msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL);
2242 if (!new_msb)
2243 goto out;
2244
2245 new_msb->card = card;
2246 memstick_set_drvdata(card, new_msb);
2247 spin_lock_init(&new_msb->q_lock);
2248 sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
2249
2250 if (msb_init_card(card))
2251 goto out;
2252
2253 if (msb->block_size != new_msb->block_size)
2254 goto out;
2255
2256 if (memcmp(msb->boot_page, new_msb->boot_page,
2257 sizeof(struct ms_boot_page)))
2258 goto out;
2259
2260 if (msb->logical_block_count != new_msb->logical_block_count ||
2261 memcmp(msb->lba_to_pba_table, new_msb->lba_to_pba_table,
2262 msb->logical_block_count))
2263 goto out;
2264
2265 if (msb->block_count != new_msb->block_count ||
2266 memcmp(msb->used_blocks_bitmap, new_msb->used_blocks_bitmap,
2267 msb->block_count / 8))
2268 goto out;
2269
2270 card_dead = false;
2271out:
2272 if (card_dead)
2273 dbg("Card was removed/replaced during suspend");
2274
2275 msb->card_dead = card_dead;
2276 memstick_set_drvdata(card, msb);
2277
2278 if (new_msb) {
2279 msb_data_clear(new_msb);
2280 kfree(new_msb);
2281 }
2282
2283 msb_start(card);
2284 mutex_unlock(&card->host->lock);
2285 return 0;
2286}
2287#else
2288
2289#define msb_suspend NULL
2290#define msb_resume NULL
2291
2292#endif
2293
2294static struct memstick_device_id msb_id_tbl[] = {
2295 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2296 MEMSTICK_CLASS_FLASH},
2297
2298 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2299 MEMSTICK_CLASS_ROM},
2300
2301 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2302 MEMSTICK_CLASS_RO},
2303
2304 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2305 MEMSTICK_CLASS_WP},
2306
2307 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_DUO, MEMSTICK_CATEGORY_STORAGE_DUO,
2308 MEMSTICK_CLASS_DUO},
2309 {}
2310};
2311MODULE_DEVICE_TABLE(memstick, msb_id_tbl);
2312
2313
2314static struct memstick_driver msb_driver = {
2315 .driver = {
2316 .name = DRIVER_NAME,
2317 .owner = THIS_MODULE
2318 },
2319 .id_table = msb_id_tbl,
2320 .probe = msb_probe,
2321 .remove = msb_remove,
2322 .suspend = msb_suspend,
2323 .resume = msb_resume
2324};
2325
2326static int __init msb_init(void)
2327{
2328 int rc = memstick_register_driver(&msb_driver);
2329 if (rc)
2330 pr_err("failed to register memstick driver (error %d)\n", rc);
2331
2332 return rc;
2333}
2334
2335static void __exit msb_exit(void)
2336{
2337 memstick_unregister_driver(&msb_driver);
2338 idr_destroy(&msb_disk_idr);
2339}
2340
2341module_init(msb_init);
2342module_exit(msb_exit);
2343
2344module_param(cache_flush_timeout, int, S_IRUGO);
2345MODULE_PARM_DESC(cache_flush_timeout,
2346 "Cache flush timeout in msec (1000 default)");
2347module_param(debug, int, S_IRUGO | S_IWUSR);
2348MODULE_PARM_DESC(debug, "Debug level (0-2)");
2349
2350module_param(verify_writes, bool, S_IRUGO);
2351MODULE_PARM_DESC(verify_writes, "Read back and check all data that is written");
2352
2353MODULE_LICENSE("GPL");
2354MODULE_AUTHOR("Maxim Levitsky");
2355MODULE_DESCRIPTION("Sony MemoryStick block device driver");
2356
