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0ab30494 ML |
1 | /* |
2 | * ms_block.c - Sony MemoryStick (legacy) storage support | |
3 | ||
4 | * Copyright (C) 2013 Maxim Levitsky <maximlevitsky@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Minor portions of the driver were copied from mspro_block.c which is | |
11 | * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com> | |
12 | * | |
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 | ||
32 | static int debug; | |
33 | static int cache_flush_timeout = 1000; | |
34 | static bool verify_writes; | |
35 | ||
36 | /* | |
37 | * Copies section of 'sg_from' starting from offset 'offset' and with length | |
38 | * 'len' To another scatterlist of to_nents enties | |
39 | */ | |
40 | static 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 | } | |
88 | out: | |
89 | sg_mark_end(sg_to); | |
90 | return copied; | |
91 | } | |
92 | ||
93 | /* | |
94 | * Compares section of 'sg' starting from offset 'offset' and with length 'len' | |
95 | * to linear buffer of length 'len' at address 'buffer' | |
96 | * Returns 0 if equal and -1 otherwice | |
97 | */ | |
98 | static 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 | /* Get zone at which block with logical address 'lba' lives | |
132 | * Flash is broken into zones. | |
133 | * Each zone consists of 512 eraseblocks, out of which in first | |
134 | * zone 494 are used and 496 are for all following zones. | |
135 | * Therefore zone #0 hosts blocks 0-493, zone #1 blocks 494-988, etc... | |
136 | */ | |
137 | static 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 | /* Get zone of physical block. Trivial */ | |
145 | static int msb_get_zone_from_pba(int pba) | |
146 | { | |
147 | return pba / MS_BLOCKS_IN_ZONE; | |
148 | } | |
149 | ||
150 | /* Debug test to validate free block counts */ | |
151 | static 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 | /* Mark physical block as used */ | |
172 | static 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 | /* No races because all IO is single threaded */ | |
187 | __set_bit(pba, msb->used_blocks_bitmap); | |
188 | msb->free_block_count[zone]--; | |
189 | } | |
190 | ||
191 | /* Mark physical block as free */ | |
192 | static 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 | /* No races because all IO is single threaded */ | |
206 | __clear_bit(pba, msb->used_blocks_bitmap); | |
207 | msb->free_block_count[zone]++; | |
208 | } | |
209 | ||
210 | /* Invalidate current register window */ | |
211 | static 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 | /* Start a state machine */ | |
221 | static 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 | /* State machines call that to exit */ | |
242 | static 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 | /* Invalidate reg window on errors */ | |
251 | if (error) | |
252 | msb_invalidate_reg_window(msb); | |
253 | ||
254 | complete(&msb->card->mrq_complete); | |
255 | return -ENXIO; | |
256 | } | |
257 | ||
258 | /* read INT register */ | |
259 | static 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 | /* Read a register */ | |
286 | static 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 | /* Write a card register */ | |
307 | static 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 | /* Handler for absence of IO */ | |
328 | static int h_msb_default_bad(struct memstick_dev *card, | |
329 | struct memstick_request **mrq) | |
330 | { | |
331 | return -ENXIO; | |
332 | } | |
333 | ||
334 | /* | |
335 | * This function is a handler for reads of one page from device. | |
336 | * Writes output to msb->current_sg, takes sector address from msb->reg.param | |
337 | * Can also be used to read extra data only. Set params accordintly. | |
338 | */ | |
339 | static 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 | } | |
351 | again: | |
352 | switch (msb->state) { | |
353 | case MSB_RP_SEND_BLOCK_ADDRESS: | |
354 | /* msb_write_regs sometimes "fails" because it needs to update | |
355 | the reg window, and thus it returns request for that. | |
356 | Then we stay in this state and retry */ | |
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 | /* If dont actually need to send the int read request (only in | |
375 | serial mode), then just fall through */ | |
376 | if (msb_read_int_reg(msb, -1)) | |
377 | return 0; | |
378 | /* fallthrough */ | |
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 | /* read the status register to understand source of the INT_ERR */ | |
399 | if (!msb_read_regs(msb, | |
400 | offsetof(struct ms_register, status), | |
401 | sizeof(struct ms_status_register))) | |
402 | return 0; | |
403 | ||
a0dce7f0 | 404 | msb->state = MSB_RP_RECEIVE_STATUS_REG; |
0ab30494 ML |
405 | return 0; |
406 | ||
a0dce7f0 | 407 | case MSB_RP_RECEIVE_STATUS_REG: |
0ab30494 ML |
408 | msb->regs.status = *(struct ms_status_register *)mrq->data; |
409 | msb->state = MSB_RP_SEND_OOB_READ; | |
410 | /* fallthrough */ | |
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 | /* fallthrough */ | |
426 | ||
427 | case MSB_RP_SEND_READ_DATA: | |
428 | /* Skip that state if we only read the oob */ | |
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 | * Handler of writes of exactly one block. | |
469 | * Takes address from msb->regs.param. | |
470 | * Writes same extra data to blocks, also taken | |
471 | * from msb->regs.extra | |
472 | * Returns -EBADMSG if write fails due to uncorrectable error, or -EIO if | |
473 | * device refuses to take the command or something else | |
474 | */ | |
475 | static 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 | ||
486 | again: | |
487 | switch (msb->state) { | |
488 | ||
489 | /* HACK: Jmicon handling of TPCs between 8 and | |
490 | * sizeof(memstick_request.data) is broken due to hardware | |
491 | * bug in PIO mode that is used for these TPCs | |
492 | * Therefore split the write | |
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 | /* fallthrough */ | |
526 | ||
527 | case MSB_WB_RECEIVE_INT_REQ: | |
528 | intreg = mrq->data[0]; | |
529 | msb->regs.status.interrupt = intreg; | |
530 | ||
531 | /* errors mean out of here, and fast... */ | |
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 | /* for last page we need to poll CED */ | |
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 | /* for non-last page we need BREQ before writing next chunk */ | |
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 | /* fallthrough */ | |
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 | * This function is used to send simple IO requests to device that consist | |
585 | * of register write + command | |
586 | */ | |
587 | static 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 | } | |
598 | again: | |
599 | switch (msb->state) { | |
600 | ||
601 | /* HACK: see h_msb_write_block */ | |
602 | case MSB_SC_SEND_WRITE_PARAMS: /* write param register*/ | |
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 | /* fallthrough */ | |
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 | /* Small handler for card reset */ | |
657 | static 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 | /* This handler is used to do serial->parallel switch */ | |
680 | static 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 | /* Set the parallel interface on memstick side */ | |
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 | /* Set parallel interface on our side + send a dummy request | |
709 | to see if card responds */ | |
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 | ||
722 | static int msb_switch_to_parallel(struct msb_data *msb); | |
723 | ||
724 | /* Reset the card, to guard against hw errors beeing treated as bad blocks */ | |
725 | static 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 | /* Reset the card */ | |
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) { | |
752 | out_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 | /* Set parallel mode */ | |
767 | if (was_parallel) | |
768 | msb_switch_to_parallel(msb); | |
769 | return 0; | |
770 | } | |
771 | ||
772 | /* Attempts to switch interface to parallel mode */ | |
773 | static 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 | /* Changes overwrite flag on a page */ | |
790 | static 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 | ||
808 | static 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 | ||
816 | static 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 | /* Erases one physical block */ | |
825 | static 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 | /* Reads one page from device */ | |
858 | static 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 | /* Mark bad pages */ | |
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 | /* Reads oob of page only */ | |
948 | static 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 | /* Reads a block and compares it with data contained in scatterlist orig_sg */ | |
976 | static 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 | /* Writes exectly one block + oob */ | |
1000 | static 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 | /* Sector we just wrote to is assumed erased since its pba | |
1052 | was erased. If it wasn't erased, write will succeed | |
1053 | and will just clear the bits that were set in the block | |
1054 | thus test that what we have written, | |
1055 | matches what we expect. | |
1056 | We do trust the blocks that we erased */ | |
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 | /* Finds a free block for write replacement */ | |
1078 | static 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 | ||
1115 | static 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 | } | |
1155 | out: | |
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 | /* Converts endiannes in the boot block for easy use */ | |
1164 | static 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 | ||
1190 | static 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(sizeof(struct ms_boot_page)*2, GFP_KERNEL); | |
1205 | if (!page) | |
1206 | return -ENOMEM; | |
1207 | ||
1208 | msb->boot_page = page; | |
1209 | } else | |
1210 | page = msb->boot_page; | |
1211 | ||
1212 | msb->block_count = MS_BLOCK_MAX_BOOT_ADDR; | |
1213 | ||
1214 | for (pba = 0; pba < MS_BLOCK_MAX_BOOT_ADDR; pba++) { | |
1215 | ||
1216 | sg_init_one(&sg, page, sizeof(*page)); | |
1217 | if (msb_read_page(msb, pba, 0, &extra, &sg, 0)) { | |
1218 | dbg("boot scan: can't read pba %d", pba); | |
1219 | continue; | |
1220 | } | |
1221 | ||
1222 | if (extra.management_flag & MEMSTICK_MANAGEMENT_SYSFLG) { | |
1223 | dbg("managment flag doesn't indicate boot block %d", | |
1224 | pba); | |
1225 | continue; | |
1226 | } | |
1227 | ||
1228 | if (be16_to_cpu(page->header.block_id) != MS_BLOCK_BOOT_ID) { | |
1229 | dbg("the pba at %d doesn' contain boot block ID", pba); | |
1230 | continue; | |
1231 | } | |
1232 | ||
1233 | msb_fix_boot_page_endianness(page); | |
1234 | msb->boot_block_locations[msb->boot_block_count] = pba; | |
1235 | ||
1236 | page++; | |
1237 | msb->boot_block_count++; | |
1238 | ||
1239 | if (msb->boot_block_count == 2) | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | if (!msb->boot_block_count) { | |
1244 | pr_err("media doesn't contain master page, aborting"); | |
1245 | return -EIO; | |
1246 | } | |
1247 | ||
1248 | dbg_verbose("End of scan for boot blocks"); | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | static int msb_read_bad_block_table(struct msb_data *msb, int block_nr) | |
1253 | { | |
1254 | struct ms_boot_page *boot_block; | |
1255 | struct scatterlist sg; | |
1256 | u16 *buffer = NULL; | |
1257 | int offset = 0; | |
1258 | int i, error = 0; | |
1259 | int data_size, data_offset, page, page_offset, size_to_read; | |
1260 | u16 pba; | |
1261 | ||
1262 | BUG_ON(block_nr > 1); | |
1263 | boot_block = &msb->boot_page[block_nr]; | |
1264 | pba = msb->boot_block_locations[block_nr]; | |
1265 | ||
1266 | if (msb->boot_block_locations[block_nr] == MS_BLOCK_INVALID) | |
1267 | return -EINVAL; | |
1268 | ||
1269 | data_size = boot_block->entry.disabled_block.data_size; | |
1270 | data_offset = sizeof(struct ms_boot_page) + | |
1271 | boot_block->entry.disabled_block.start_addr; | |
1272 | if (!data_size) | |
1273 | return 0; | |
1274 | ||
1275 | page = data_offset / msb->page_size; | |
1276 | page_offset = data_offset % msb->page_size; | |
1277 | size_to_read = | |
1278 | DIV_ROUND_UP(data_size + page_offset, msb->page_size) * | |
1279 | msb->page_size; | |
1280 | ||
1281 | dbg("reading bad block of boot block at pba %d, offset %d len %d", | |
1282 | pba, data_offset, data_size); | |
1283 | ||
1284 | buffer = kzalloc(size_to_read, GFP_KERNEL); | |
1285 | if (!buffer) | |
1286 | return -ENOMEM; | |
1287 | ||
1288 | /* Read the buffer */ | |
1289 | sg_init_one(&sg, buffer, size_to_read); | |
1290 | ||
1291 | while (offset < size_to_read) { | |
1292 | error = msb_read_page(msb, pba, page, NULL, &sg, offset); | |
1293 | if (error) | |
1294 | goto out; | |
1295 | ||
1296 | page++; | |
1297 | offset += msb->page_size; | |
1298 | ||
1299 | if (page == msb->pages_in_block) { | |
1300 | pr_err( | |
1301 | "bad block table extends beyond the boot block"); | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | /* Process the bad block table */ | |
1307 | for (i = page_offset; i < data_size / sizeof(u16); i++) { | |
1308 | ||
1309 | u16 bad_block = be16_to_cpu(buffer[i]); | |
1310 | ||
1311 | if (bad_block >= msb->block_count) { | |
1312 | dbg("bad block table contains invalid block %d", | |
1313 | bad_block); | |
1314 | continue; | |
1315 | } | |
1316 | ||
1317 | if (test_bit(bad_block, msb->used_blocks_bitmap)) { | |
1318 | dbg("duplicate bad block %d in the table", | |
1319 | bad_block); | |
1320 | continue; | |
1321 | } | |
1322 | ||
1323 | dbg("block %d is marked as factory bad", bad_block); | |
1324 | msb_mark_block_used(msb, bad_block); | |
1325 | } | |
1326 | out: | |
1327 | kfree(buffer); | |
1328 | return error; | |
1329 | } | |
1330 | ||
1331 | static int msb_ftl_initialize(struct msb_data *msb) | |
1332 | { | |
1333 | int i; | |
1334 | ||
1335 | if (msb->ftl_initialized) | |
1336 | return 0; | |
1337 | ||
1338 | msb->zone_count = msb->block_count / MS_BLOCKS_IN_ZONE; | |
1339 | msb->logical_block_count = msb->zone_count * 496 - 2; | |
1340 | ||
1341 | msb->used_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL); | |
1342 | msb->erased_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL); | |
1343 | msb->lba_to_pba_table = | |
1344 | kmalloc(msb->logical_block_count * sizeof(u16), GFP_KERNEL); | |
1345 | ||
1346 | if (!msb->used_blocks_bitmap || !msb->lba_to_pba_table || | |
1347 | !msb->erased_blocks_bitmap) { | |
1348 | kfree(msb->used_blocks_bitmap); | |
1349 | kfree(msb->lba_to_pba_table); | |
1350 | kfree(msb->erased_blocks_bitmap); | |
1351 | return -ENOMEM; | |
1352 | } | |
1353 | ||
1354 | for (i = 0; i < msb->zone_count; i++) | |
1355 | msb->free_block_count[i] = MS_BLOCKS_IN_ZONE; | |
1356 | ||
1357 | memset(msb->lba_to_pba_table, MS_BLOCK_INVALID, | |
1358 | msb->logical_block_count * sizeof(u16)); | |
1359 | ||
1360 | dbg("initial FTL tables created. Zone count = %d, Logical block count = %d", | |
1361 | msb->zone_count, msb->logical_block_count); | |
1362 | ||
1363 | msb->ftl_initialized = true; | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | static int msb_ftl_scan(struct msb_data *msb) | |
1368 | { | |
1369 | u16 pba, lba, other_block; | |
1370 | u8 overwrite_flag, managment_flag, other_overwrite_flag; | |
1371 | int error; | |
1372 | struct ms_extra_data_register extra; | |
1373 | u8 *overwrite_flags = kzalloc(msb->block_count, GFP_KERNEL); | |
1374 | ||
1375 | if (!overwrite_flags) | |
1376 | return -ENOMEM; | |
1377 | ||
1378 | dbg("Start of media scanning"); | |
1379 | for (pba = 0; pba < msb->block_count; pba++) { | |
1380 | ||
1381 | if (pba == msb->boot_block_locations[0] || | |
1382 | pba == msb->boot_block_locations[1]) { | |
1383 | dbg_verbose("pba %05d -> [boot block]", pba); | |
1384 | msb_mark_block_used(msb, pba); | |
1385 | continue; | |
1386 | } | |
1387 | ||
1388 | if (test_bit(pba, msb->used_blocks_bitmap)) { | |
1389 | dbg_verbose("pba %05d -> [factory bad]", pba); | |
1390 | continue; | |
1391 | } | |
1392 | ||
1393 | memset(&extra, 0, sizeof(extra)); | |
1394 | error = msb_read_oob(msb, pba, 0, &extra); | |
1395 | ||
1396 | /* can't trust the page if we can't read the oob */ | |
1397 | if (error == -EBADMSG) { | |
1398 | pr_notice( | |
1399 | "oob of pba %d damaged, will try to erase it", pba); | |
1400 | msb_mark_block_used(msb, pba); | |
1401 | msb_erase_block(msb, pba); | |
1402 | continue; | |
1403 | } else if (error) { | |
1404 | pr_err("unknown error %d on read of oob of pba %d - aborting", | |
1405 | error, pba); | |
1406 | ||
1407 | kfree(overwrite_flags); | |
1408 | return error; | |
1409 | } | |
1410 | ||
1411 | lba = be16_to_cpu(extra.logical_address); | |
1412 | managment_flag = extra.management_flag; | |
1413 | overwrite_flag = extra.overwrite_flag; | |
1414 | overwrite_flags[pba] = overwrite_flag; | |
1415 | ||
1416 | /* Skip bad blocks */ | |
1417 | if (!(overwrite_flag & MEMSTICK_OVERWRITE_BKST)) { | |
1418 | dbg("pba %05d -> [BAD]", pba); | |
1419 | msb_mark_block_used(msb, pba); | |
1420 | continue; | |
1421 | } | |
1422 | ||
1423 | /* Skip system/drm blocks */ | |
1424 | if ((managment_flag & MEMSTICK_MANAGMENT_FLAG_NORMAL) != | |
1425 | MEMSTICK_MANAGMENT_FLAG_NORMAL) { | |
1426 | dbg("pba %05d -> [reserved managment flag %02x]", | |
1427 | pba, managment_flag); | |
1428 | msb_mark_block_used(msb, pba); | |
1429 | continue; | |
1430 | } | |
1431 | ||
1432 | /* Erase temporary tables */ | |
1433 | if (!(managment_flag & MEMSTICK_MANAGEMENT_ATFLG)) { | |
1434 | dbg("pba %05d -> [temp table] - will erase", pba); | |
1435 | ||
1436 | msb_mark_block_used(msb, pba); | |
1437 | msb_erase_block(msb, pba); | |
1438 | continue; | |
1439 | } | |
1440 | ||
1441 | if (lba == MS_BLOCK_INVALID) { | |
1442 | dbg_verbose("pba %05d -> [free]", pba); | |
1443 | continue; | |
1444 | } | |
1445 | ||
1446 | msb_mark_block_used(msb, pba); | |
1447 | ||
1448 | /* Block has LBA not according to zoning*/ | |
1449 | if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) { | |
1450 | pr_notice("pba %05d -> [bad lba %05d] - will erase", | |
1451 | pba, lba); | |
1452 | msb_erase_block(msb, pba); | |
1453 | continue; | |
1454 | } | |
1455 | ||
1456 | /* No collisions - great */ | |
1457 | if (msb->lba_to_pba_table[lba] == MS_BLOCK_INVALID) { | |
1458 | dbg_verbose("pba %05d -> [lba %05d]", pba, lba); | |
1459 | msb->lba_to_pba_table[lba] = pba; | |
1460 | continue; | |
1461 | } | |
1462 | ||
1463 | other_block = msb->lba_to_pba_table[lba]; | |
1464 | other_overwrite_flag = overwrite_flags[other_block]; | |
1465 | ||
1466 | pr_notice("Collision between pba %d and pba %d", | |
1467 | pba, other_block); | |
1468 | ||
1469 | if (!(overwrite_flag & MEMSTICK_OVERWRITE_UDST)) { | |
1470 | pr_notice("pba %d is marked as stable, use it", pba); | |
1471 | msb_erase_block(msb, other_block); | |
1472 | msb->lba_to_pba_table[lba] = pba; | |
1473 | continue; | |
1474 | } | |
1475 | ||
1476 | if (!(other_overwrite_flag & MEMSTICK_OVERWRITE_UDST)) { | |
1477 | pr_notice("pba %d is marked as stable, use it", | |
1478 | other_block); | |
1479 | msb_erase_block(msb, pba); | |
1480 | continue; | |
1481 | } | |
1482 | ||
1483 | pr_notice("collision between blocks %d and %d, without stable flag set on both, erasing pba %d", | |
1484 | pba, other_block, other_block); | |
1485 | ||
1486 | msb_erase_block(msb, other_block); | |
1487 | msb->lba_to_pba_table[lba] = pba; | |
1488 | } | |
1489 | ||
1490 | dbg("End of media scanning"); | |
1491 | kfree(overwrite_flags); | |
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | static void msb_cache_flush_timer(unsigned long data) | |
1496 | { | |
1497 | struct msb_data *msb = (struct msb_data *)data; | |
1498 | msb->need_flush_cache = true; | |
1499 | queue_work(msb->io_queue, &msb->io_work); | |
1500 | } | |
1501 | ||
1502 | ||
1503 | static void msb_cache_discard(struct msb_data *msb) | |
1504 | { | |
1505 | if (msb->cache_block_lba == MS_BLOCK_INVALID) | |
1506 | return; | |
1507 | ||
1508 | del_timer_sync(&msb->cache_flush_timer); | |
1509 | ||
1510 | dbg_verbose("Discarding the write cache"); | |
1511 | msb->cache_block_lba = MS_BLOCK_INVALID; | |
1512 | bitmap_zero(&msb->valid_cache_bitmap, msb->pages_in_block); | |
1513 | } | |
1514 | ||
1515 | static int msb_cache_init(struct msb_data *msb) | |
1516 | { | |
1517 | setup_timer(&msb->cache_flush_timer, msb_cache_flush_timer, | |
1518 | (unsigned long)msb); | |
1519 | ||
1520 | if (!msb->cache) | |
1521 | msb->cache = kzalloc(msb->block_size, GFP_KERNEL); | |
1522 | if (!msb->cache) | |
1523 | return -ENOMEM; | |
1524 | ||
1525 | msb_cache_discard(msb); | |
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | static int msb_cache_flush(struct msb_data *msb) | |
1530 | { | |
1531 | struct scatterlist sg; | |
1532 | struct ms_extra_data_register extra; | |
1533 | int page, offset, error; | |
1534 | u16 pba, lba; | |
1535 | ||
1536 | if (msb->read_only) | |
1537 | return -EROFS; | |
1538 | ||
1539 | if (msb->cache_block_lba == MS_BLOCK_INVALID) | |
1540 | return 0; | |
1541 | ||
1542 | lba = msb->cache_block_lba; | |
1543 | pba = msb->lba_to_pba_table[lba]; | |
1544 | ||
1545 | dbg_verbose("Flushing the write cache of pba %d (LBA %d)", | |
1546 | pba, msb->cache_block_lba); | |
1547 | ||
1548 | sg_init_one(&sg, msb->cache , msb->block_size); | |
1549 | ||
1550 | /* Read all missing pages in cache */ | |
1551 | for (page = 0; page < msb->pages_in_block; page++) { | |
1552 | ||
1553 | if (test_bit(page, &msb->valid_cache_bitmap)) | |
1554 | continue; | |
1555 | ||
1556 | offset = page * msb->page_size; | |
1557 | ||
1558 | dbg_verbose("reading non-present sector %d of cache block %d", | |
1559 | page, lba); | |
1560 | error = msb_read_page(msb, pba, page, &extra, &sg, offset); | |
1561 | ||
1562 | /* Bad pages are copied with 00 page status */ | |
1563 | if (error == -EBADMSG) { | |
1564 | pr_err("read error on sector %d, contents probably damaged", page); | |
1565 | continue; | |
1566 | } | |
1567 | ||
1568 | if (error) | |
1569 | return error; | |
1570 | ||
1571 | if ((extra.overwrite_flag & MEMSTICK_OV_PG_NORMAL) != | |
1572 | MEMSTICK_OV_PG_NORMAL) { | |
1573 | dbg("page %d is marked as bad", page); | |
1574 | continue; | |
1575 | } | |
1576 | ||
1577 | set_bit(page, &msb->valid_cache_bitmap); | |
1578 | } | |
1579 | ||
1580 | /* Write the cache now */ | |
1581 | error = msb_update_block(msb, msb->cache_block_lba, &sg, 0); | |
1582 | pba = msb->lba_to_pba_table[msb->cache_block_lba]; | |
1583 | ||
1584 | /* Mark invalid pages */ | |
1585 | if (!error) { | |
1586 | for (page = 0; page < msb->pages_in_block; page++) { | |
1587 | ||
1588 | if (test_bit(page, &msb->valid_cache_bitmap)) | |
1589 | continue; | |
1590 | ||
1591 | dbg("marking page %d as containing damaged data", | |
1592 | page); | |
1593 | msb_set_overwrite_flag(msb, | |
1594 | pba , page, 0xFF & ~MEMSTICK_OV_PG_NORMAL); | |
1595 | } | |
1596 | } | |
1597 | ||
1598 | msb_cache_discard(msb); | |
1599 | return error; | |
1600 | } | |
1601 | ||
1602 | static int msb_cache_write(struct msb_data *msb, int lba, | |
1603 | int page, bool add_to_cache_only, struct scatterlist *sg, int offset) | |
1604 | { | |
1605 | int error; | |
1606 | struct scatterlist sg_tmp[10]; | |
1607 | ||
1608 | if (msb->read_only) | |
1609 | return -EROFS; | |
1610 | ||
1611 | if (msb->cache_block_lba == MS_BLOCK_INVALID || | |
1612 | lba != msb->cache_block_lba) | |
1613 | if (add_to_cache_only) | |
1614 | return 0; | |
1615 | ||
1616 | /* If we need to write different block */ | |
1617 | if (msb->cache_block_lba != MS_BLOCK_INVALID && | |
1618 | lba != msb->cache_block_lba) { | |
1619 | dbg_verbose("first flush the cache"); | |
1620 | error = msb_cache_flush(msb); | |
1621 | if (error) | |
1622 | return error; | |
1623 | } | |
1624 | ||
1625 | if (msb->cache_block_lba == MS_BLOCK_INVALID) { | |
1626 | msb->cache_block_lba = lba; | |
1627 | mod_timer(&msb->cache_flush_timer, | |
1628 | jiffies + msecs_to_jiffies(cache_flush_timeout)); | |
1629 | } | |
1630 | ||
1631 | dbg_verbose("Write of LBA %d page %d to cache ", lba, page); | |
1632 | ||
1633 | sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp)); | |
1634 | msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp), offset, msb->page_size); | |
1635 | ||
1636 | sg_copy_to_buffer(sg_tmp, sg_nents(sg_tmp), | |
1637 | msb->cache + page * msb->page_size, msb->page_size); | |
1638 | ||
1639 | set_bit(page, &msb->valid_cache_bitmap); | |
1640 | return 0; | |
1641 | } | |
1642 | ||
1643 | static int msb_cache_read(struct msb_data *msb, int lba, | |
1644 | int page, struct scatterlist *sg, int offset) | |
1645 | { | |
1646 | int pba = msb->lba_to_pba_table[lba]; | |
1647 | struct scatterlist sg_tmp[10]; | |
1648 | int error = 0; | |
1649 | ||
1650 | if (lba == msb->cache_block_lba && | |
1651 | test_bit(page, &msb->valid_cache_bitmap)) { | |
1652 | ||
1653 | dbg_verbose("Read of LBA %d (pba %d) sector %d from cache", | |
1654 | lba, pba, page); | |
1655 | ||
1656 | sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp)); | |
1657 | msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp), | |
1658 | offset, msb->page_size); | |
1659 | sg_copy_from_buffer(sg_tmp, sg_nents(sg_tmp), | |
1660 | msb->cache + msb->page_size * page, | |
1661 | msb->page_size); | |
1662 | } else { | |
1663 | dbg_verbose("Read of LBA %d (pba %d) sector %d from device", | |
1664 | lba, pba, page); | |
1665 | ||
1666 | error = msb_read_page(msb, pba, page, NULL, sg, offset); | |
1667 | if (error) | |
1668 | return error; | |
1669 | ||
1670 | msb_cache_write(msb, lba, page, true, sg, offset); | |
1671 | } | |
1672 | return error; | |
1673 | } | |
1674 | ||
1675 | /* Emulated geometry table | |
1676 | * This table content isn't that importaint, | |
1677 | * One could put here different values, providing that they still | |
1678 | * cover whole disk. | |
1679 | * 64 MB entry is what windows reports for my 64M memstick */ | |
1680 | ||
1681 | static const struct chs_entry chs_table[] = { | |
1682 | /* size sectors cylynders heads */ | |
1683 | { 4, 16, 247, 2 }, | |
1684 | { 8, 16, 495, 2 }, | |
1685 | { 16, 16, 495, 4 }, | |
1686 | { 32, 16, 991, 4 }, | |
1687 | { 64, 16, 991, 8 }, | |
1688 | {128, 16, 991, 16 }, | |
1689 | { 0 } | |
1690 | }; | |
1691 | ||
1692 | /* Load information about the card */ | |
1693 | static int msb_init_card(struct memstick_dev *card) | |
1694 | { | |
1695 | struct msb_data *msb = memstick_get_drvdata(card); | |
1696 | struct memstick_host *host = card->host; | |
1697 | struct ms_boot_page *boot_block; | |
1698 | int error = 0, i, raw_size_in_megs; | |
1699 | ||
1700 | msb->caps = 0; | |
1701 | ||
1702 | if (card->id.class >= MEMSTICK_CLASS_ROM && | |
1703 | card->id.class <= MEMSTICK_CLASS_ROM) | |
1704 | msb->read_only = true; | |
1705 | ||
1706 | msb->state = -1; | |
1707 | error = msb_reset(msb, false); | |
1708 | if (error) | |
1709 | return error; | |
1710 | ||
1711 | /* Due to a bug in Jmicron driver written by Alex Dubov, | |
1712 | its serial mode barely works, | |
1713 | so we switch to parallel mode right away */ | |
1714 | if (host->caps & MEMSTICK_CAP_PAR4) | |
1715 | msb_switch_to_parallel(msb); | |
1716 | ||
1717 | msb->page_size = sizeof(struct ms_boot_page); | |
1718 | ||
1719 | /* Read the boot page */ | |
1720 | error = msb_read_boot_blocks(msb); | |
1721 | if (error) | |
1722 | return -EIO; | |
1723 | ||
1724 | boot_block = &msb->boot_page[0]; | |
1725 | ||
1726 | /* Save intersting attributes from boot page */ | |
1727 | msb->block_count = boot_block->attr.number_of_blocks; | |
1728 | msb->page_size = boot_block->attr.page_size; | |
1729 | ||
1730 | msb->pages_in_block = boot_block->attr.block_size * 2; | |
1731 | msb->block_size = msb->page_size * msb->pages_in_block; | |
1732 | ||
1733 | if (msb->page_size > PAGE_SIZE) { | |
1734 | /* this isn't supported by linux at all, anyway*/ | |
1735 | dbg("device page %d size isn't supported", msb->page_size); | |
1736 | return -EINVAL; | |
1737 | } | |
1738 | ||
1739 | msb->block_buffer = kzalloc(msb->block_size, GFP_KERNEL); | |
1740 | if (!msb->block_buffer) | |
1741 | return -ENOMEM; | |
1742 | ||
1743 | raw_size_in_megs = (msb->block_size * msb->block_count) >> 20; | |
1744 | ||
1745 | for (i = 0; chs_table[i].size; i++) { | |
1746 | ||
1747 | if (chs_table[i].size != raw_size_in_megs) | |
1748 | continue; | |
1749 | ||
1750 | msb->geometry.cylinders = chs_table[i].cyl; | |
1751 | msb->geometry.heads = chs_table[i].head; | |
1752 | msb->geometry.sectors = chs_table[i].sec; | |
1753 | break; | |
1754 | } | |
1755 | ||
1756 | if (boot_block->attr.transfer_supporting == 1) | |
1757 | msb->caps |= MEMSTICK_CAP_PAR4; | |
1758 | ||
1759 | if (boot_block->attr.device_type & 0x03) | |
1760 | msb->read_only = true; | |
1761 | ||
1762 | dbg("Total block count = %d", msb->block_count); | |
1763 | dbg("Each block consists of %d pages", msb->pages_in_block); | |
1764 | dbg("Page size = %d bytes", msb->page_size); | |
1765 | dbg("Parallel mode supported: %d", !!(msb->caps & MEMSTICK_CAP_PAR4)); | |
1766 | dbg("Read only: %d", msb->read_only); | |
1767 | ||
1768 | #if 0 | |
1769 | /* Now we can switch the interface */ | |
1770 | if (host->caps & msb->caps & MEMSTICK_CAP_PAR4) | |
1771 | msb_switch_to_parallel(msb); | |
1772 | #endif | |
1773 | ||
1774 | error = msb_cache_init(msb); | |
1775 | if (error) | |
1776 | return error; | |
1777 | ||
1778 | error = msb_ftl_initialize(msb); | |
1779 | if (error) | |
1780 | return error; | |
1781 | ||
1782 | ||
1783 | /* Read the bad block table */ | |
1784 | error = msb_read_bad_block_table(msb, 0); | |
1785 | ||
1786 | if (error && error != -ENOMEM) { | |
1787 | dbg("failed to read bad block table from primary boot block, trying from backup"); | |
1788 | error = msb_read_bad_block_table(msb, 1); | |
1789 | } | |
1790 | ||
1791 | if (error) | |
1792 | return error; | |
1793 | ||
1794 | /* *drum roll* Scan the media */ | |
1795 | error = msb_ftl_scan(msb); | |
1796 | if (error) { | |
1797 | pr_err("Scan of media failed"); | |
1798 | return error; | |
1799 | } | |
1800 | ||
1801 | return 0; | |
1802 | ||
1803 | } | |
1804 | ||
1805 | static int msb_do_write_request(struct msb_data *msb, int lba, | |
1806 | int page, struct scatterlist *sg, size_t len, int *sucessfuly_written) | |
1807 | { | |
1808 | int error = 0; | |
1809 | off_t offset = 0; | |
1810 | *sucessfuly_written = 0; | |
1811 | ||
1812 | while (offset < len) { | |
1813 | if (page == 0 && len - offset >= msb->block_size) { | |
1814 | ||
1815 | if (msb->cache_block_lba == lba) | |
1816 | msb_cache_discard(msb); | |
1817 | ||
1818 | dbg_verbose("Writing whole lba %d", lba); | |
1819 | error = msb_update_block(msb, lba, sg, offset); | |
1820 | if (error) | |
1821 | return error; | |
1822 | ||
1823 | offset += msb->block_size; | |
1824 | *sucessfuly_written += msb->block_size; | |
1825 | lba++; | |
1826 | continue; | |
1827 | } | |
1828 | ||
1829 | error = msb_cache_write(msb, lba, page, false, sg, offset); | |
1830 | if (error) | |
1831 | return error; | |
1832 | ||
1833 | offset += msb->page_size; | |
1834 | *sucessfuly_written += msb->page_size; | |
1835 | ||
1836 | page++; | |
1837 | if (page == msb->pages_in_block) { | |
1838 | page = 0; | |
1839 | lba++; | |
1840 | } | |
1841 | } | |
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | static int msb_do_read_request(struct msb_data *msb, int lba, | |
1846 | int page, struct scatterlist *sg, int len, int *sucessfuly_read) | |
1847 | { | |
1848 | int error = 0; | |
1849 | int offset = 0; | |
1850 | *sucessfuly_read = 0; | |
1851 | ||
1852 | while (offset < len) { | |
1853 | ||
1854 | error = msb_cache_read(msb, lba, page, sg, offset); | |
1855 | if (error) | |
1856 | return error; | |
1857 | ||
1858 | offset += msb->page_size; | |
1859 | *sucessfuly_read += msb->page_size; | |
1860 | ||
1861 | page++; | |
1862 | if (page == msb->pages_in_block) { | |
1863 | page = 0; | |
1864 | lba++; | |
1865 | } | |
1866 | } | |
1867 | return 0; | |
1868 | } | |
1869 | ||
1870 | static void msb_io_work(struct work_struct *work) | |
1871 | { | |
1872 | struct msb_data *msb = container_of(work, struct msb_data, io_work); | |
1873 | int page, error, len; | |
1874 | sector_t lba; | |
1875 | unsigned long flags; | |
1876 | struct scatterlist *sg = msb->prealloc_sg; | |
1877 | ||
1878 | dbg_verbose("IO: work started"); | |
1879 | ||
1880 | while (1) { | |
1881 | spin_lock_irqsave(&msb->q_lock, flags); | |
1882 | ||
1883 | if (msb->need_flush_cache) { | |
1884 | msb->need_flush_cache = false; | |
1885 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
1886 | msb_cache_flush(msb); | |
1887 | continue; | |
1888 | } | |
1889 | ||
1890 | if (!msb->req) { | |
1891 | msb->req = blk_fetch_request(msb->queue); | |
1892 | if (!msb->req) { | |
1893 | dbg_verbose("IO: no more requests exiting"); | |
1894 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
1895 | return; | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
1900 | ||
1901 | /* If card was removed meanwhile */ | |
1902 | if (!msb->req) | |
1903 | return; | |
1904 | ||
1905 | /* process the request */ | |
1906 | dbg_verbose("IO: processing new request"); | |
1907 | blk_rq_map_sg(msb->queue, msb->req, sg); | |
1908 | ||
1909 | lba = blk_rq_pos(msb->req); | |
1910 | ||
1911 | sector_div(lba, msb->page_size / 512); | |
1912 | page = do_div(lba, msb->pages_in_block); | |
1913 | ||
1914 | if (rq_data_dir(msb->req) == READ) | |
1915 | error = msb_do_read_request(msb, lba, page, sg, | |
1916 | blk_rq_bytes(msb->req), &len); | |
1917 | else | |
1918 | error = msb_do_write_request(msb, lba, page, sg, | |
1919 | blk_rq_bytes(msb->req), &len); | |
1920 | ||
1921 | spin_lock_irqsave(&msb->q_lock, flags); | |
1922 | ||
1923 | if (len) | |
1924 | if (!__blk_end_request(msb->req, 0, len)) | |
1925 | msb->req = NULL; | |
1926 | ||
1927 | if (error && msb->req) { | |
1928 | dbg_verbose("IO: ending one sector of the request with error"); | |
1929 | if (!__blk_end_request(msb->req, error, msb->page_size)) | |
1930 | msb->req = NULL; | |
1931 | } | |
1932 | ||
1933 | if (msb->req) | |
1934 | dbg_verbose("IO: request still pending"); | |
1935 | ||
1936 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
1937 | } | |
1938 | } | |
1939 | ||
1940 | static DEFINE_IDR(msb_disk_idr); /*set of used disk numbers */ | |
1941 | static DEFINE_MUTEX(msb_disk_lock); /* protects against races in open/release */ | |
1942 | ||
1943 | static int msb_bd_open(struct block_device *bdev, fmode_t mode) | |
1944 | { | |
1945 | struct gendisk *disk = bdev->bd_disk; | |
1946 | struct msb_data *msb = disk->private_data; | |
1947 | ||
1948 | dbg_verbose("block device open"); | |
1949 | ||
1950 | mutex_lock(&msb_disk_lock); | |
1951 | ||
1952 | if (msb && msb->card) | |
1953 | msb->usage_count++; | |
1954 | ||
1955 | mutex_unlock(&msb_disk_lock); | |
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | static void msb_data_clear(struct msb_data *msb) | |
1960 | { | |
1961 | kfree(msb->boot_page); | |
1962 | kfree(msb->used_blocks_bitmap); | |
1963 | kfree(msb->lba_to_pba_table); | |
1964 | kfree(msb->cache); | |
1965 | msb->card = NULL; | |
1966 | } | |
1967 | ||
1968 | static int msb_disk_release(struct gendisk *disk) | |
1969 | { | |
1970 | struct msb_data *msb = disk->private_data; | |
1971 | ||
1972 | dbg_verbose("block device release"); | |
1973 | mutex_lock(&msb_disk_lock); | |
1974 | ||
1975 | if (msb) { | |
1976 | if (msb->usage_count) | |
1977 | msb->usage_count--; | |
1978 | ||
1979 | if (!msb->usage_count) { | |
1980 | disk->private_data = NULL; | |
1981 | idr_remove(&msb_disk_idr, msb->disk_id); | |
1982 | put_disk(disk); | |
1983 | kfree(msb); | |
1984 | } | |
1985 | } | |
1986 | mutex_unlock(&msb_disk_lock); | |
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | static void msb_bd_release(struct gendisk *disk, fmode_t mode) | |
1991 | { | |
1992 | msb_disk_release(disk); | |
1993 | } | |
1994 | ||
1995 | static int msb_bd_getgeo(struct block_device *bdev, | |
1996 | struct hd_geometry *geo) | |
1997 | { | |
1998 | struct msb_data *msb = bdev->bd_disk->private_data; | |
1999 | *geo = msb->geometry; | |
2000 | return 0; | |
2001 | } | |
2002 | ||
2003 | static int msb_prepare_req(struct request_queue *q, struct request *req) | |
2004 | { | |
2005 | if (req->cmd_type != REQ_TYPE_FS && | |
2006 | req->cmd_type != REQ_TYPE_BLOCK_PC) { | |
2007 | blk_dump_rq_flags(req, "MS unsupported request"); | |
2008 | return BLKPREP_KILL; | |
2009 | } | |
2010 | req->cmd_flags |= REQ_DONTPREP; | |
2011 | return BLKPREP_OK; | |
2012 | } | |
2013 | ||
2014 | static void msb_submit_req(struct request_queue *q) | |
2015 | { | |
2016 | struct memstick_dev *card = q->queuedata; | |
2017 | struct msb_data *msb = memstick_get_drvdata(card); | |
2018 | struct request *req = NULL; | |
2019 | ||
2020 | dbg_verbose("Submit request"); | |
2021 | ||
2022 | if (msb->card_dead) { | |
2023 | dbg("Refusing requests on removed card"); | |
2024 | ||
2025 | WARN_ON(!msb->io_queue_stopped); | |
2026 | ||
2027 | while ((req = blk_fetch_request(q)) != NULL) | |
2028 | __blk_end_request_all(req, -ENODEV); | |
2029 | return; | |
2030 | } | |
2031 | ||
2032 | if (msb->req) | |
2033 | return; | |
2034 | ||
2035 | if (!msb->io_queue_stopped) | |
2036 | queue_work(msb->io_queue, &msb->io_work); | |
2037 | } | |
2038 | ||
2039 | static int msb_check_card(struct memstick_dev *card) | |
2040 | { | |
2041 | struct msb_data *msb = memstick_get_drvdata(card); | |
2042 | return (msb->card_dead == 0); | |
2043 | } | |
2044 | ||
2045 | static void msb_stop(struct memstick_dev *card) | |
2046 | { | |
2047 | struct msb_data *msb = memstick_get_drvdata(card); | |
2048 | unsigned long flags; | |
2049 | ||
2050 | dbg("Stopping all msblock IO"); | |
2051 | ||
2052 | spin_lock_irqsave(&msb->q_lock, flags); | |
2053 | blk_stop_queue(msb->queue); | |
2054 | msb->io_queue_stopped = true; | |
2055 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
2056 | ||
2057 | del_timer_sync(&msb->cache_flush_timer); | |
2058 | flush_workqueue(msb->io_queue); | |
2059 | ||
2060 | if (msb->req) { | |
2061 | spin_lock_irqsave(&msb->q_lock, flags); | |
2062 | blk_requeue_request(msb->queue, msb->req); | |
2063 | msb->req = NULL; | |
2064 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
2065 | } | |
2066 | ||
2067 | } | |
2068 | ||
2069 | static void msb_start(struct memstick_dev *card) | |
2070 | { | |
2071 | struct msb_data *msb = memstick_get_drvdata(card); | |
2072 | unsigned long flags; | |
2073 | ||
2074 | dbg("Resuming IO from msblock"); | |
2075 | ||
2076 | msb_invalidate_reg_window(msb); | |
2077 | ||
2078 | spin_lock_irqsave(&msb->q_lock, flags); | |
2079 | if (!msb->io_queue_stopped || msb->card_dead) { | |
2080 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
2081 | return; | |
2082 | } | |
2083 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
2084 | ||
2085 | /* Kick cache flush anyway, its harmless */ | |
2086 | msb->need_flush_cache = true; | |
2087 | msb->io_queue_stopped = false; | |
2088 | ||
2089 | spin_lock_irqsave(&msb->q_lock, flags); | |
2090 | blk_start_queue(msb->queue); | |
2091 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
2092 | ||
2093 | queue_work(msb->io_queue, &msb->io_work); | |
2094 | ||
2095 | } | |
2096 | ||
2097 | static const struct block_device_operations msb_bdops = { | |
2098 | .open = msb_bd_open, | |
2099 | .release = msb_bd_release, | |
2100 | .getgeo = msb_bd_getgeo, | |
2101 | .owner = THIS_MODULE | |
2102 | }; | |
2103 | ||
2104 | /* Registers the block device */ | |
2105 | static int msb_init_disk(struct memstick_dev *card) | |
2106 | { | |
2107 | struct msb_data *msb = memstick_get_drvdata(card); | |
2108 | struct memstick_host *host = card->host; | |
2109 | int rc; | |
2110 | u64 limit = BLK_BOUNCE_HIGH; | |
2111 | unsigned long capacity; | |
2112 | ||
2113 | if (host->dev.dma_mask && *(host->dev.dma_mask)) | |
2114 | limit = *(host->dev.dma_mask); | |
2115 | ||
2116 | mutex_lock(&msb_disk_lock); | |
2117 | msb->disk_id = idr_alloc(&msb_disk_idr, card, 0, 256, GFP_KERNEL); | |
2118 | mutex_unlock(&msb_disk_lock); | |
2119 | ||
2120 | if (msb->disk_id < 0) | |
2121 | return msb->disk_id; | |
2122 | ||
2123 | msb->disk = alloc_disk(0); | |
2124 | if (!msb->disk) { | |
2125 | rc = -ENOMEM; | |
2126 | goto out_release_id; | |
2127 | } | |
2128 | ||
2129 | msb->queue = blk_init_queue(msb_submit_req, &msb->q_lock); | |
2130 | if (!msb->queue) { | |
2131 | rc = -ENOMEM; | |
2132 | goto out_put_disk; | |
2133 | } | |
2134 | ||
2135 | msb->queue->queuedata = card; | |
2136 | blk_queue_prep_rq(msb->queue, msb_prepare_req); | |
2137 | ||
2138 | blk_queue_bounce_limit(msb->queue, limit); | |
2139 | blk_queue_max_hw_sectors(msb->queue, MS_BLOCK_MAX_PAGES); | |
2140 | blk_queue_max_segments(msb->queue, MS_BLOCK_MAX_SEGS); | |
2141 | blk_queue_max_segment_size(msb->queue, | |
2142 | MS_BLOCK_MAX_PAGES * msb->page_size); | |
2143 | blk_queue_logical_block_size(msb->queue, msb->page_size); | |
2144 | ||
2145 | sprintf(msb->disk->disk_name, "msblk%d", msb->disk_id); | |
2146 | msb->disk->fops = &msb_bdops; | |
2147 | msb->disk->private_data = msb; | |
2148 | msb->disk->queue = msb->queue; | |
2149 | msb->disk->driverfs_dev = &card->dev; | |
2150 | msb->disk->flags |= GENHD_FL_EXT_DEVT; | |
2151 | ||
2152 | capacity = msb->pages_in_block * msb->logical_block_count; | |
2153 | capacity *= (msb->page_size / 512); | |
2154 | set_capacity(msb->disk, capacity); | |
2155 | dbg("Set total disk size to %lu sectors", capacity); | |
2156 | ||
2157 | msb->usage_count = 1; | |
2158 | msb->io_queue = alloc_ordered_workqueue("ms_block", WQ_MEM_RECLAIM); | |
2159 | INIT_WORK(&msb->io_work, msb_io_work); | |
2160 | sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1); | |
2161 | ||
2162 | if (msb->read_only) | |
2163 | set_disk_ro(msb->disk, 1); | |
2164 | ||
2165 | msb_start(card); | |
2166 | add_disk(msb->disk); | |
2167 | dbg("Disk added"); | |
2168 | return 0; | |
2169 | ||
2170 | out_put_disk: | |
2171 | put_disk(msb->disk); | |
2172 | out_release_id: | |
2173 | mutex_lock(&msb_disk_lock); | |
2174 | idr_remove(&msb_disk_idr, msb->disk_id); | |
2175 | mutex_unlock(&msb_disk_lock); | |
2176 | return rc; | |
2177 | } | |
2178 | ||
2179 | static int msb_probe(struct memstick_dev *card) | |
2180 | { | |
2181 | struct msb_data *msb; | |
2182 | int rc = 0; | |
2183 | ||
2184 | msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL); | |
2185 | if (!msb) | |
2186 | return -ENOMEM; | |
2187 | memstick_set_drvdata(card, msb); | |
2188 | msb->card = card; | |
2189 | spin_lock_init(&msb->q_lock); | |
2190 | ||
2191 | rc = msb_init_card(card); | |
2192 | if (rc) | |
2193 | goto out_free; | |
2194 | ||
2195 | rc = msb_init_disk(card); | |
2196 | if (!rc) { | |
2197 | card->check = msb_check_card; | |
2198 | card->stop = msb_stop; | |
2199 | card->start = msb_start; | |
2200 | return 0; | |
2201 | } | |
2202 | out_free: | |
2203 | memstick_set_drvdata(card, NULL); | |
2204 | msb_data_clear(msb); | |
2205 | kfree(msb); | |
2206 | return rc; | |
2207 | } | |
2208 | ||
2209 | static void msb_remove(struct memstick_dev *card) | |
2210 | { | |
2211 | struct msb_data *msb = memstick_get_drvdata(card); | |
2212 | unsigned long flags; | |
2213 | ||
2214 | if (!msb->io_queue_stopped) | |
2215 | msb_stop(card); | |
2216 | ||
2217 | dbg("Removing the disk device"); | |
2218 | ||
2219 | /* Take care of unhandled + new requests from now on */ | |
2220 | spin_lock_irqsave(&msb->q_lock, flags); | |
2221 | msb->card_dead = true; | |
2222 | blk_start_queue(msb->queue); | |
2223 | spin_unlock_irqrestore(&msb->q_lock, flags); | |
2224 | ||
2225 | /* Remove the disk */ | |
2226 | del_gendisk(msb->disk); | |
2227 | blk_cleanup_queue(msb->queue); | |
2228 | msb->queue = NULL; | |
2229 | ||
2230 | mutex_lock(&msb_disk_lock); | |
2231 | msb_data_clear(msb); | |
2232 | mutex_unlock(&msb_disk_lock); | |
2233 | ||
2234 | msb_disk_release(msb->disk); | |
2235 | memstick_set_drvdata(card, NULL); | |
2236 | } | |
2237 | ||
2238 | #ifdef CONFIG_PM | |
2239 | ||
2240 | static int msb_suspend(struct memstick_dev *card, pm_message_t state) | |
2241 | { | |
2242 | msb_stop(card); | |
2243 | return 0; | |
2244 | } | |
2245 | ||
2246 | static int msb_resume(struct memstick_dev *card) | |
2247 | { | |
2248 | struct msb_data *msb = memstick_get_drvdata(card); | |
2249 | struct msb_data *new_msb = NULL; | |
2250 | bool card_dead = true; | |
2251 | ||
2252 | #ifndef CONFIG_MEMSTICK_UNSAFE_RESUME | |
2253 | msb->card_dead = true; | |
2254 | return 0; | |
2255 | #endif | |
2256 | mutex_lock(&card->host->lock); | |
2257 | ||
2258 | new_msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL); | |
2259 | if (!new_msb) | |
2260 | goto out; | |
2261 | ||
2262 | new_msb->card = card; | |
2263 | memstick_set_drvdata(card, new_msb); | |
2264 | spin_lock_init(&new_msb->q_lock); | |
2265 | sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1); | |
2266 | ||
2267 | if (msb_init_card(card)) | |
2268 | goto out; | |
2269 | ||
2270 | if (msb->block_size != new_msb->block_size) | |
2271 | goto out; | |
2272 | ||
2273 | if (memcmp(msb->boot_page, new_msb->boot_page, | |
2274 | sizeof(struct ms_boot_page))) | |
2275 | goto out; | |
2276 | ||
2277 | if (msb->logical_block_count != new_msb->logical_block_count || | |
2278 | memcmp(msb->lba_to_pba_table, new_msb->lba_to_pba_table, | |
2279 | msb->logical_block_count)) | |
2280 | goto out; | |
2281 | ||
2282 | if (msb->block_count != new_msb->block_count || | |
2283 | memcmp(msb->used_blocks_bitmap, new_msb->used_blocks_bitmap, | |
2284 | msb->block_count / 8)) | |
2285 | goto out; | |
2286 | ||
2287 | card_dead = false; | |
2288 | out: | |
2289 | if (card_dead) | |
2290 | dbg("Card was removed/replaced during suspend"); | |
2291 | ||
2292 | msb->card_dead = card_dead; | |
2293 | memstick_set_drvdata(card, msb); | |
2294 | ||
2295 | if (new_msb) { | |
2296 | msb_data_clear(new_msb); | |
2297 | kfree(new_msb); | |
2298 | } | |
2299 | ||
2300 | msb_start(card); | |
2301 | mutex_unlock(&card->host->lock); | |
2302 | return 0; | |
2303 | } | |
2304 | #else | |
2305 | ||
2306 | #define msb_suspend NULL | |
2307 | #define msb_resume NULL | |
2308 | ||
2309 | #endif /* CONFIG_PM */ | |
2310 | ||
2311 | static struct memstick_device_id msb_id_tbl[] = { | |
2312 | {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE, | |
2313 | MEMSTICK_CLASS_FLASH}, | |
2314 | ||
2315 | {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE, | |
2316 | MEMSTICK_CLASS_ROM}, | |
2317 | ||
2318 | {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE, | |
2319 | MEMSTICK_CLASS_RO}, | |
2320 | ||
2321 | {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE, | |
2322 | MEMSTICK_CLASS_WP}, | |
2323 | ||
2324 | {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_DUO, MEMSTICK_CATEGORY_STORAGE_DUO, | |
2325 | MEMSTICK_CLASS_DUO}, | |
2326 | {} | |
2327 | }; | |
2328 | MODULE_DEVICE_TABLE(memstick, msb_id_tbl); | |
2329 | ||
2330 | ||
2331 | static struct memstick_driver msb_driver = { | |
2332 | .driver = { | |
2333 | .name = DRIVER_NAME, | |
2334 | .owner = THIS_MODULE | |
2335 | }, | |
2336 | .id_table = msb_id_tbl, | |
2337 | .probe = msb_probe, | |
2338 | .remove = msb_remove, | |
2339 | .suspend = msb_suspend, | |
2340 | .resume = msb_resume | |
2341 | }; | |
2342 | ||
2343 | static int major; | |
2344 | ||
2345 | static int __init msb_init(void) | |
2346 | { | |
2347 | int rc = register_blkdev(0, DRIVER_NAME); | |
2348 | ||
2349 | if (rc < 0) { | |
2350 | pr_err("failed to register major (error %d)\n", rc); | |
2351 | return rc; | |
2352 | } | |
2353 | ||
2354 | major = rc; | |
2355 | rc = memstick_register_driver(&msb_driver); | |
2356 | if (rc) { | |
2357 | unregister_blkdev(major, DRIVER_NAME); | |
2358 | pr_err("failed to register memstick driver (error %d)\n", rc); | |
2359 | } | |
2360 | ||
2361 | return rc; | |
2362 | } | |
2363 | ||
2364 | static void __exit msb_exit(void) | |
2365 | { | |
2366 | memstick_unregister_driver(&msb_driver); | |
2367 | unregister_blkdev(major, DRIVER_NAME); | |
2368 | idr_destroy(&msb_disk_idr); | |
2369 | } | |
2370 | ||
2371 | module_init(msb_init); | |
2372 | module_exit(msb_exit); | |
2373 | ||
2374 | module_param(cache_flush_timeout, int, S_IRUGO); | |
2375 | MODULE_PARM_DESC(cache_flush_timeout, | |
2376 | "Cache flush timeout in msec (1000 default)"); | |
2377 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
2378 | MODULE_PARM_DESC(debug, "Debug level (0-2)"); | |
2379 | ||
2380 | module_param(verify_writes, bool, S_IRUGO); | |
2381 | MODULE_PARM_DESC(verify_writes, "Read back and check all data that is written"); | |
2382 | ||
2383 | MODULE_LICENSE("GPL"); | |
2384 | MODULE_AUTHOR("Maxim Levitsky"); | |
2385 | MODULE_DESCRIPTION("Sony MemoryStick block device driver"); |