1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Driver for SanDisk SDDR-55 SmartMedia reader |
4 | * |
5 | * SDDR55 driver v0.1: |
6 | * |
7 | * First release |
8 | * |
9 | * Current development and maintenance by: |
10 | * (c) 2002 Simon Munton |
11 | */ |
12 | |
13 | #include <linux/jiffies.h> |
14 | #include <linux/errno.h> |
15 | #include <linux/module.h> |
16 | #include <linux/slab.h> |
17 | |
18 | #include <scsi/scsi.h> |
19 | #include <scsi/scsi_cmnd.h> |
20 | |
21 | #include "usb.h" |
22 | #include "transport.h" |
23 | #include "protocol.h" |
24 | #include "debug.h" |
25 | #include "scsiglue.h" |
26 | |
27 | #define DRV_NAME "ums-sddr55" |
28 | |
29 | MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader" ); |
30 | MODULE_AUTHOR("Simon Munton" ); |
31 | MODULE_LICENSE("GPL" ); |
32 | MODULE_IMPORT_NS(USB_STORAGE); |
33 | |
34 | /* |
35 | * The table of devices |
36 | */ |
37 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
38 | vendorName, productName, useProtocol, useTransport, \ |
39 | initFunction, flags) \ |
40 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ |
41 | .driver_info = (flags) } |
42 | |
43 | static struct usb_device_id sddr55_usb_ids[] = { |
44 | # include "unusual_sddr55.h" |
45 | { } /* Terminating entry */ |
46 | }; |
47 | MODULE_DEVICE_TABLE(usb, sddr55_usb_ids); |
48 | |
49 | #undef UNUSUAL_DEV |
50 | |
51 | /* |
52 | * The flags table |
53 | */ |
54 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
55 | vendor_name, product_name, use_protocol, use_transport, \ |
56 | init_function, Flags) \ |
57 | { \ |
58 | .vendorName = vendor_name, \ |
59 | .productName = product_name, \ |
60 | .useProtocol = use_protocol, \ |
61 | .useTransport = use_transport, \ |
62 | .initFunction = init_function, \ |
63 | } |
64 | |
65 | static struct us_unusual_dev sddr55_unusual_dev_list[] = { |
66 | # include "unusual_sddr55.h" |
67 | { } /* Terminating entry */ |
68 | }; |
69 | |
70 | #undef UNUSUAL_DEV |
71 | |
72 | |
73 | #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) ) |
74 | #define LSB_of(s) ((s)&0xFF) |
75 | #define MSB_of(s) ((s)>>8) |
76 | #define PAGESIZE 512 |
77 | |
78 | #define set_sense_info(sk, asc, ascq) \ |
79 | do { \ |
80 | info->sense_data[2] = sk; \ |
81 | info->sense_data[12] = asc; \ |
82 | info->sense_data[13] = ascq; \ |
83 | } while (0) |
84 | |
85 | |
86 | struct sddr55_card_info { |
87 | unsigned long capacity; /* Size of card in bytes */ |
88 | int max_log_blks; /* maximum number of logical blocks */ |
89 | int pageshift; /* log2 of pagesize */ |
90 | int smallpageshift; /* 1 if pagesize == 256 */ |
91 | int blocksize; /* Size of block in pages */ |
92 | int blockshift; /* log2 of blocksize */ |
93 | int blockmask; /* 2^blockshift - 1 */ |
94 | int read_only; /* non zero if card is write protected */ |
95 | int force_read_only; /* non zero if we find a map error*/ |
96 | int *lba_to_pba; /* logical to physical map */ |
97 | int *pba_to_lba; /* physical to logical map */ |
98 | int fatal_error; /* set if we detect something nasty */ |
99 | unsigned long last_access; /* number of jiffies since we last talked to device */ |
100 | unsigned char sense_data[18]; |
101 | }; |
102 | |
103 | |
104 | #define NOT_ALLOCATED 0xffffffff |
105 | #define BAD_BLOCK 0xffff |
106 | #define CIS_BLOCK 0x400 |
107 | #define UNUSED_BLOCK 0x3ff |
108 | |
109 | static int |
110 | sddr55_bulk_transport(struct us_data *us, int direction, |
111 | unsigned char *data, unsigned int len) { |
112 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; |
113 | unsigned int pipe = (direction == DMA_FROM_DEVICE) ? |
114 | us->recv_bulk_pipe : us->send_bulk_pipe; |
115 | |
116 | if (!len) |
117 | return USB_STOR_XFER_GOOD; |
118 | info->last_access = jiffies; |
119 | return usb_stor_bulk_transfer_buf(us, pipe, buf: data, length: len, NULL); |
120 | } |
121 | |
122 | /* |
123 | * check if card inserted, if there is, update read_only status |
124 | * return non zero if no card |
125 | */ |
126 | |
127 | static int sddr55_status(struct us_data *us) |
128 | { |
129 | int result; |
130 | unsigned char *command = us->iobuf; |
131 | unsigned char *status = us->iobuf; |
132 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; |
133 | |
134 | /* send command */ |
135 | memset(command, 0, 8); |
136 | command[5] = 0xB0; |
137 | command[7] = 0x80; |
138 | result = sddr55_bulk_transport(us, |
139 | direction: DMA_TO_DEVICE, data: command, len: 8); |
140 | |
141 | usb_stor_dbg(us, fmt: "Result for send_command in status %d\n" , result); |
142 | |
143 | if (result != USB_STOR_XFER_GOOD) { |
144 | set_sense_info (4, 0, 0); /* hardware error */ |
145 | return USB_STOR_TRANSPORT_ERROR; |
146 | } |
147 | |
148 | result = sddr55_bulk_transport(us, |
149 | direction: DMA_FROM_DEVICE, data: status, len: 4); |
150 | |
151 | /* expect to get short transfer if no card fitted */ |
152 | if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) { |
153 | /* had a short transfer, no card inserted, free map memory */ |
154 | kfree(objp: info->lba_to_pba); |
155 | kfree(objp: info->pba_to_lba); |
156 | info->lba_to_pba = NULL; |
157 | info->pba_to_lba = NULL; |
158 | |
159 | info->fatal_error = 0; |
160 | info->force_read_only = 0; |
161 | |
162 | set_sense_info (2, 0x3a, 0); /* not ready, medium not present */ |
163 | return USB_STOR_TRANSPORT_FAILED; |
164 | } |
165 | |
166 | if (result != USB_STOR_XFER_GOOD) { |
167 | set_sense_info (4, 0, 0); /* hardware error */ |
168 | return USB_STOR_TRANSPORT_FAILED; |
169 | } |
170 | |
171 | /* check write protect status */ |
172 | info->read_only = (status[0] & 0x20); |
173 | |
174 | /* now read status */ |
175 | result = sddr55_bulk_transport(us, |
176 | direction: DMA_FROM_DEVICE, data: status, len: 2); |
177 | |
178 | if (result != USB_STOR_XFER_GOOD) { |
179 | set_sense_info (4, 0, 0); /* hardware error */ |
180 | } |
181 | |
182 | return (result == USB_STOR_XFER_GOOD ? |
183 | USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED); |
184 | } |
185 | |
186 | |
187 | static int sddr55_read_data(struct us_data *us, |
188 | unsigned int lba, |
189 | unsigned int page, |
190 | unsigned short sectors) { |
191 | |
192 | int result = USB_STOR_TRANSPORT_GOOD; |
193 | unsigned char *command = us->iobuf; |
194 | unsigned char *status = us->iobuf; |
195 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; |
196 | unsigned char *buffer; |
197 | |
198 | unsigned int pba; |
199 | unsigned int address; |
200 | |
201 | unsigned short pages; |
202 | unsigned int len, offset; |
203 | struct scatterlist *sg; |
204 | |
205 | // Since we only read in one block at a time, we have to create |
206 | // a bounce buffer and move the data a piece at a time between the |
207 | // bounce buffer and the actual transfer buffer. |
208 | |
209 | len = min((unsigned int) sectors, (unsigned int) info->blocksize >> |
210 | info->smallpageshift) * PAGESIZE; |
211 | buffer = kmalloc(size: len, GFP_NOIO); |
212 | if (buffer == NULL) |
213 | return USB_STOR_TRANSPORT_ERROR; /* out of memory */ |
214 | offset = 0; |
215 | sg = NULL; |
216 | |
217 | while (sectors>0) { |
218 | |
219 | /* have we got to end? */ |
220 | if (lba >= info->max_log_blks) |
221 | break; |
222 | |
223 | pba = info->lba_to_pba[lba]; |
224 | |
225 | // Read as many sectors as possible in this block |
226 | |
227 | pages = min((unsigned int) sectors << info->smallpageshift, |
228 | info->blocksize - page); |
229 | len = pages << info->pageshift; |
230 | |
231 | usb_stor_dbg(us, fmt: "Read %02X pages, from PBA %04X (LBA %04X) page %02X\n" , |
232 | pages, pba, lba, page); |
233 | |
234 | if (pba == NOT_ALLOCATED) { |
235 | /* no pba for this lba, fill with zeroes */ |
236 | memset (buffer, 0, len); |
237 | } else { |
238 | |
239 | address = (pba << info->blockshift) + page; |
240 | |
241 | command[0] = 0; |
242 | command[1] = LSB_of(address>>16); |
243 | command[2] = LSB_of(address>>8); |
244 | command[3] = LSB_of(address); |
245 | |
246 | command[4] = 0; |
247 | command[5] = 0xB0; |
248 | command[6] = LSB_of(pages << (1 - info->smallpageshift)); |
249 | command[7] = 0x85; |
250 | |
251 | /* send command */ |
252 | result = sddr55_bulk_transport(us, |
253 | direction: DMA_TO_DEVICE, data: command, len: 8); |
254 | |
255 | usb_stor_dbg(us, fmt: "Result for send_command in read_data %d\n" , |
256 | result); |
257 | |
258 | if (result != USB_STOR_XFER_GOOD) { |
259 | result = USB_STOR_TRANSPORT_ERROR; |
260 | goto leave; |
261 | } |
262 | |
263 | /* read data */ |
264 | result = sddr55_bulk_transport(us, |
265 | direction: DMA_FROM_DEVICE, data: buffer, len); |
266 | |
267 | if (result != USB_STOR_XFER_GOOD) { |
268 | result = USB_STOR_TRANSPORT_ERROR; |
269 | goto leave; |
270 | } |
271 | |
272 | /* now read status */ |
273 | result = sddr55_bulk_transport(us, |
274 | direction: DMA_FROM_DEVICE, data: status, len: 2); |
275 | |
276 | if (result != USB_STOR_XFER_GOOD) { |
277 | result = USB_STOR_TRANSPORT_ERROR; |
278 | goto leave; |
279 | } |
280 | |
281 | /* check status for error */ |
282 | if (status[0] == 0xff && status[1] == 0x4) { |
283 | set_sense_info (3, 0x11, 0); |
284 | result = USB_STOR_TRANSPORT_FAILED; |
285 | goto leave; |
286 | } |
287 | } |
288 | |
289 | // Store the data in the transfer buffer |
290 | usb_stor_access_xfer_buf(buffer, buflen: len, srb: us->srb, |
291 | &sg, offset: &offset, dir: TO_XFER_BUF); |
292 | |
293 | page = 0; |
294 | lba++; |
295 | sectors -= pages >> info->smallpageshift; |
296 | } |
297 | |
298 | result = USB_STOR_TRANSPORT_GOOD; |
299 | |
300 | leave: |
301 | kfree(objp: buffer); |
302 | |
303 | return result; |
304 | } |
305 | |
306 | static int sddr55_write_data(struct us_data *us, |
307 | unsigned int lba, |
308 | unsigned int page, |
309 | unsigned short sectors) { |
310 | |
311 | int result = USB_STOR_TRANSPORT_GOOD; |
312 | unsigned char *command = us->iobuf; |
313 | unsigned char *status = us->iobuf; |
314 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; |
315 | unsigned char *buffer; |
316 | |
317 | unsigned int pba; |
318 | unsigned int new_pba; |
319 | unsigned int address; |
320 | |
321 | unsigned short pages; |
322 | int i; |
323 | unsigned int len, offset; |
324 | struct scatterlist *sg; |
325 | |
326 | /* check if we are allowed to write */ |
327 | if (info->read_only || info->force_read_only) { |
328 | set_sense_info (7, 0x27, 0); /* read only */ |
329 | return USB_STOR_TRANSPORT_FAILED; |
330 | } |
331 | |
332 | // Since we only write one block at a time, we have to create |
333 | // a bounce buffer and move the data a piece at a time between the |
334 | // bounce buffer and the actual transfer buffer. |
335 | |
336 | len = min((unsigned int) sectors, (unsigned int) info->blocksize >> |
337 | info->smallpageshift) * PAGESIZE; |
338 | buffer = kmalloc(size: len, GFP_NOIO); |
339 | if (buffer == NULL) |
340 | return USB_STOR_TRANSPORT_ERROR; |
341 | offset = 0; |
342 | sg = NULL; |
343 | |
344 | while (sectors > 0) { |
345 | |
346 | /* have we got to end? */ |
347 | if (lba >= info->max_log_blks) |
348 | break; |
349 | |
350 | pba = info->lba_to_pba[lba]; |
351 | |
352 | // Write as many sectors as possible in this block |
353 | |
354 | pages = min((unsigned int) sectors << info->smallpageshift, |
355 | info->blocksize - page); |
356 | len = pages << info->pageshift; |
357 | |
358 | // Get the data from the transfer buffer |
359 | usb_stor_access_xfer_buf(buffer, buflen: len, srb: us->srb, |
360 | &sg, offset: &offset, dir: FROM_XFER_BUF); |
361 | |
362 | usb_stor_dbg(us, fmt: "Write %02X pages, to PBA %04X (LBA %04X) page %02X\n" , |
363 | pages, pba, lba, page); |
364 | |
365 | command[4] = 0; |
366 | |
367 | if (pba == NOT_ALLOCATED) { |
368 | /* no pba allocated for this lba, find a free pba to use */ |
369 | |
370 | int max_pba = (info->max_log_blks / 250 ) * 256; |
371 | int found_count = 0; |
372 | int found_pba = -1; |
373 | |
374 | /* set pba to first block in zone lba is in */ |
375 | pba = (lba / 1000) * 1024; |
376 | |
377 | usb_stor_dbg(us, fmt: "No PBA for LBA %04X\n" , lba); |
378 | |
379 | if (max_pba > 1024) |
380 | max_pba = 1024; |
381 | |
382 | /* |
383 | * Scan through the map looking for an unused block |
384 | * leave 16 unused blocks at start (or as many as |
385 | * possible) since the sddr55 seems to reuse a used |
386 | * block when it shouldn't if we don't leave space. |
387 | */ |
388 | for (i = 0; i < max_pba; i++, pba++) { |
389 | if (info->pba_to_lba[pba] == UNUSED_BLOCK) { |
390 | found_pba = pba; |
391 | if (found_count++ > 16) |
392 | break; |
393 | } |
394 | } |
395 | |
396 | pba = found_pba; |
397 | |
398 | if (pba == -1) { |
399 | /* oh dear */ |
400 | usb_stor_dbg(us, fmt: "Couldn't find unallocated block\n" ); |
401 | |
402 | set_sense_info (3, 0x31, 0); /* medium error */ |
403 | result = USB_STOR_TRANSPORT_FAILED; |
404 | goto leave; |
405 | } |
406 | |
407 | usb_stor_dbg(us, fmt: "Allocating PBA %04X for LBA %04X\n" , |
408 | pba, lba); |
409 | |
410 | /* set writing to unallocated block flag */ |
411 | command[4] = 0x40; |
412 | } |
413 | |
414 | address = (pba << info->blockshift) + page; |
415 | |
416 | command[1] = LSB_of(address>>16); |
417 | command[2] = LSB_of(address>>8); |
418 | command[3] = LSB_of(address); |
419 | |
420 | /* set the lba into the command, modulo 1000 */ |
421 | command[0] = LSB_of(lba % 1000); |
422 | command[6] = MSB_of(lba % 1000); |
423 | |
424 | command[4] |= LSB_of(pages >> info->smallpageshift); |
425 | command[5] = 0xB0; |
426 | command[7] = 0x86; |
427 | |
428 | /* send command */ |
429 | result = sddr55_bulk_transport(us, |
430 | direction: DMA_TO_DEVICE, data: command, len: 8); |
431 | |
432 | if (result != USB_STOR_XFER_GOOD) { |
433 | usb_stor_dbg(us, fmt: "Result for send_command in write_data %d\n" , |
434 | result); |
435 | |
436 | /* set_sense_info is superfluous here? */ |
437 | set_sense_info (3, 0x3, 0);/* peripheral write error */ |
438 | result = USB_STOR_TRANSPORT_FAILED; |
439 | goto leave; |
440 | } |
441 | |
442 | /* send the data */ |
443 | result = sddr55_bulk_transport(us, |
444 | direction: DMA_TO_DEVICE, data: buffer, len); |
445 | |
446 | if (result != USB_STOR_XFER_GOOD) { |
447 | usb_stor_dbg(us, fmt: "Result for send_data in write_data %d\n" , |
448 | result); |
449 | |
450 | /* set_sense_info is superfluous here? */ |
451 | set_sense_info (3, 0x3, 0);/* peripheral write error */ |
452 | result = USB_STOR_TRANSPORT_FAILED; |
453 | goto leave; |
454 | } |
455 | |
456 | /* now read status */ |
457 | result = sddr55_bulk_transport(us, direction: DMA_FROM_DEVICE, data: status, len: 6); |
458 | |
459 | if (result != USB_STOR_XFER_GOOD) { |
460 | usb_stor_dbg(us, fmt: "Result for get_status in write_data %d\n" , |
461 | result); |
462 | |
463 | /* set_sense_info is superfluous here? */ |
464 | set_sense_info (3, 0x3, 0);/* peripheral write error */ |
465 | result = USB_STOR_TRANSPORT_FAILED; |
466 | goto leave; |
467 | } |
468 | |
469 | new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) |
470 | >> info->blockshift; |
471 | |
472 | /* check status for error */ |
473 | if (status[0] == 0xff && status[1] == 0x4) { |
474 | info->pba_to_lba[new_pba] = BAD_BLOCK; |
475 | |
476 | set_sense_info (3, 0x0c, 0); |
477 | result = USB_STOR_TRANSPORT_FAILED; |
478 | goto leave; |
479 | } |
480 | |
481 | usb_stor_dbg(us, fmt: "Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n" , |
482 | lba, pba, new_pba); |
483 | |
484 | /* update the lba<->pba maps, note new_pba might be the same as pba */ |
485 | info->lba_to_pba[lba] = new_pba; |
486 | info->pba_to_lba[pba] = UNUSED_BLOCK; |
487 | |
488 | /* check that new_pba wasn't already being used */ |
489 | if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) { |
490 | printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n" , |
491 | new_pba, info->pba_to_lba[new_pba]); |
492 | info->fatal_error = 1; |
493 | set_sense_info (3, 0x31, 0); |
494 | result = USB_STOR_TRANSPORT_FAILED; |
495 | goto leave; |
496 | } |
497 | |
498 | /* update the pba<->lba maps for new_pba */ |
499 | info->pba_to_lba[new_pba] = lba % 1000; |
500 | |
501 | page = 0; |
502 | lba++; |
503 | sectors -= pages >> info->smallpageshift; |
504 | } |
505 | result = USB_STOR_TRANSPORT_GOOD; |
506 | |
507 | leave: |
508 | kfree(objp: buffer); |
509 | return result; |
510 | } |
511 | |
512 | static int sddr55_read_deviceID(struct us_data *us, |
513 | unsigned char *manufacturerID, |
514 | unsigned char *deviceID) { |
515 | |
516 | int result; |
517 | unsigned char *command = us->iobuf; |
518 | unsigned char *content = us->iobuf; |
519 | |
520 | memset(command, 0, 8); |
521 | command[5] = 0xB0; |
522 | command[7] = 0x84; |
523 | result = sddr55_bulk_transport(us, direction: DMA_TO_DEVICE, data: command, len: 8); |
524 | |
525 | usb_stor_dbg(us, fmt: "Result of send_control for device ID is %d\n" , |
526 | result); |
527 | |
528 | if (result != USB_STOR_XFER_GOOD) |
529 | return USB_STOR_TRANSPORT_ERROR; |
530 | |
531 | result = sddr55_bulk_transport(us, |
532 | direction: DMA_FROM_DEVICE, data: content, len: 4); |
533 | |
534 | if (result != USB_STOR_XFER_GOOD) |
535 | return USB_STOR_TRANSPORT_ERROR; |
536 | |
537 | *manufacturerID = content[0]; |
538 | *deviceID = content[1]; |
539 | |
540 | if (content[0] != 0xff) { |
541 | result = sddr55_bulk_transport(us, |
542 | direction: DMA_FROM_DEVICE, data: content, len: 2); |
543 | } |
544 | |
545 | return USB_STOR_TRANSPORT_GOOD; |
546 | } |
547 | |
548 | |
549 | static int sddr55_reset(struct us_data *us) |
550 | { |
551 | return 0; |
552 | } |
553 | |
554 | |
555 | static unsigned long sddr55_get_capacity(struct us_data *us) { |
556 | |
557 | unsigned char manufacturerID; |
558 | unsigned char deviceID; |
559 | int result; |
560 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; |
561 | |
562 | usb_stor_dbg(us, fmt: "Reading capacity...\n" ); |
563 | |
564 | result = sddr55_read_deviceID(us, |
565 | manufacturerID: &manufacturerID, |
566 | deviceID: &deviceID); |
567 | |
568 | usb_stor_dbg(us, fmt: "Result of read_deviceID is %d\n" , result); |
569 | |
570 | if (result != USB_STOR_XFER_GOOD) |
571 | return 0; |
572 | |
573 | usb_stor_dbg(us, fmt: "Device ID = %02X\n" , deviceID); |
574 | usb_stor_dbg(us, fmt: "Manuf ID = %02X\n" , manufacturerID); |
575 | |
576 | info->pageshift = 9; |
577 | info->smallpageshift = 0; |
578 | info->blocksize = 16; |
579 | info->blockshift = 4; |
580 | info->blockmask = 15; |
581 | |
582 | switch (deviceID) { |
583 | |
584 | case 0x6e: // 1MB |
585 | case 0xe8: |
586 | case 0xec: |
587 | info->pageshift = 8; |
588 | info->smallpageshift = 1; |
589 | return 0x00100000; |
590 | |
591 | case 0xea: // 2MB |
592 | case 0x64: |
593 | info->pageshift = 8; |
594 | info->smallpageshift = 1; |
595 | fallthrough; |
596 | case 0x5d: // 5d is a ROM card with pagesize 512. |
597 | return 0x00200000; |
598 | |
599 | case 0xe3: // 4MB |
600 | case 0xe5: |
601 | case 0x6b: |
602 | case 0xd5: |
603 | return 0x00400000; |
604 | |
605 | case 0xe6: // 8MB |
606 | case 0xd6: |
607 | return 0x00800000; |
608 | |
609 | case 0x73: // 16MB |
610 | info->blocksize = 32; |
611 | info->blockshift = 5; |
612 | info->blockmask = 31; |
613 | return 0x01000000; |
614 | |
615 | case 0x75: // 32MB |
616 | info->blocksize = 32; |
617 | info->blockshift = 5; |
618 | info->blockmask = 31; |
619 | return 0x02000000; |
620 | |
621 | case 0x76: // 64MB |
622 | info->blocksize = 32; |
623 | info->blockshift = 5; |
624 | info->blockmask = 31; |
625 | return 0x04000000; |
626 | |
627 | case 0x79: // 128MB |
628 | info->blocksize = 32; |
629 | info->blockshift = 5; |
630 | info->blockmask = 31; |
631 | return 0x08000000; |
632 | |
633 | default: // unknown |
634 | return 0; |
635 | |
636 | } |
637 | } |
638 | |
639 | static int sddr55_read_map(struct us_data *us) { |
640 | |
641 | struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra); |
642 | int numblocks; |
643 | unsigned char *buffer; |
644 | unsigned char *command = us->iobuf; |
645 | int i; |
646 | unsigned short lba; |
647 | unsigned short max_lba; |
648 | int result; |
649 | |
650 | if (!info->capacity) |
651 | return -1; |
652 | |
653 | numblocks = info->capacity >> (info->blockshift + info->pageshift); |
654 | |
655 | buffer = kmalloc_array(n: numblocks, size: 2, GFP_NOIO ); |
656 | |
657 | if (!buffer) |
658 | return -1; |
659 | |
660 | memset(command, 0, 8); |
661 | command[5] = 0xB0; |
662 | command[6] = numblocks * 2 / 256; |
663 | command[7] = 0x8A; |
664 | |
665 | result = sddr55_bulk_transport(us, direction: DMA_TO_DEVICE, data: command, len: 8); |
666 | |
667 | if ( result != USB_STOR_XFER_GOOD) { |
668 | kfree (objp: buffer); |
669 | return -1; |
670 | } |
671 | |
672 | result = sddr55_bulk_transport(us, direction: DMA_FROM_DEVICE, data: buffer, len: numblocks * 2); |
673 | |
674 | if ( result != USB_STOR_XFER_GOOD) { |
675 | kfree (objp: buffer); |
676 | return -1; |
677 | } |
678 | |
679 | result = sddr55_bulk_transport(us, direction: DMA_FROM_DEVICE, data: command, len: 2); |
680 | |
681 | if ( result != USB_STOR_XFER_GOOD) { |
682 | kfree (objp: buffer); |
683 | return -1; |
684 | } |
685 | |
686 | kfree(objp: info->lba_to_pba); |
687 | kfree(objp: info->pba_to_lba); |
688 | info->lba_to_pba = kmalloc_array(n: numblocks, size: sizeof(int), GFP_NOIO); |
689 | info->pba_to_lba = kmalloc_array(n: numblocks, size: sizeof(int), GFP_NOIO); |
690 | |
691 | if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) { |
692 | kfree(objp: info->lba_to_pba); |
693 | kfree(objp: info->pba_to_lba); |
694 | info->lba_to_pba = NULL; |
695 | info->pba_to_lba = NULL; |
696 | kfree(objp: buffer); |
697 | return -1; |
698 | } |
699 | |
700 | memset(info->lba_to_pba, 0xff, numblocks*sizeof(int)); |
701 | memset(info->pba_to_lba, 0xff, numblocks*sizeof(int)); |
702 | |
703 | /* set maximum lba */ |
704 | max_lba = info->max_log_blks; |
705 | if (max_lba > 1000) |
706 | max_lba = 1000; |
707 | |
708 | /* |
709 | * Each block is 64 bytes of control data, so block i is located in |
710 | * scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11) |
711 | */ |
712 | |
713 | for (i=0; i<numblocks; i++) { |
714 | int zone = i / 1024; |
715 | |
716 | lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]); |
717 | |
718 | /* |
719 | * Every 1024 physical blocks ("zone"), the LBA numbers |
720 | * go back to zero, but are within a higher |
721 | * block of LBA's. Also, there is a maximum of |
722 | * 1000 LBA's per zone. In other words, in PBA |
723 | * 1024-2047 you will find LBA 0-999 which are |
724 | * really LBA 1000-1999. Yes, this wastes 24 |
725 | * physical blocks per zone. Go figure. |
726 | * These devices can have blocks go bad, so there |
727 | * are 24 spare blocks to use when blocks do go bad. |
728 | */ |
729 | |
730 | /* |
731 | * SDDR55 returns 0xffff for a bad block, and 0x400 for the |
732 | * CIS block. (Is this true for cards 8MB or less??) |
733 | * Record these in the physical to logical map |
734 | */ |
735 | |
736 | info->pba_to_lba[i] = lba; |
737 | |
738 | if (lba >= max_lba) { |
739 | continue; |
740 | } |
741 | |
742 | if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED && |
743 | !info->force_read_only) { |
744 | printk(KERN_WARNING |
745 | "sddr55: map inconsistency at LBA %04X\n" , |
746 | lba + zone * 1000); |
747 | info->force_read_only = 1; |
748 | } |
749 | |
750 | if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF)) |
751 | usb_stor_dbg(us, fmt: "LBA %04X <-> PBA %04X\n" , lba, i); |
752 | |
753 | info->lba_to_pba[lba + zone * 1000] = i; |
754 | } |
755 | |
756 | kfree(objp: buffer); |
757 | return 0; |
758 | } |
759 | |
760 | |
761 | static void sddr55_card_info_destructor(void *) { |
762 | struct sddr55_card_info *info = (struct sddr55_card_info *)extra; |
763 | |
764 | if (!extra) |
765 | return; |
766 | |
767 | kfree(objp: info->lba_to_pba); |
768 | kfree(objp: info->pba_to_lba); |
769 | } |
770 | |
771 | |
772 | /* |
773 | * Transport for the Sandisk SDDR-55 |
774 | */ |
775 | static int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us) |
776 | { |
777 | int result; |
778 | static unsigned char inquiry_response[8] = { |
779 | 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00 |
780 | }; |
781 | // write-protected for now, no block descriptor support |
782 | static unsigned char mode_page_01[20] = { |
783 | 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0, |
784 | 0x01, 0x0A, |
785 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
786 | }; |
787 | unsigned char *ptr = us->iobuf; |
788 | unsigned long capacity; |
789 | unsigned int lba; |
790 | unsigned int pba; |
791 | unsigned int page; |
792 | unsigned short pages; |
793 | struct sddr55_card_info *info; |
794 | |
795 | if (!us->extra) { |
796 | us->extra = kzalloc( |
797 | size: sizeof(struct sddr55_card_info), GFP_NOIO); |
798 | if (!us->extra) |
799 | return USB_STOR_TRANSPORT_ERROR; |
800 | us->extra_destructor = sddr55_card_info_destructor; |
801 | } |
802 | |
803 | info = (struct sddr55_card_info *)(us->extra); |
804 | |
805 | if (srb->cmnd[0] == REQUEST_SENSE) { |
806 | usb_stor_dbg(us, fmt: "request sense %02x/%02x/%02x\n" , |
807 | info->sense_data[2], |
808 | info->sense_data[12], |
809 | info->sense_data[13]); |
810 | |
811 | memcpy (ptr, info->sense_data, sizeof info->sense_data); |
812 | ptr[0] = 0x70; |
813 | ptr[7] = 11; |
814 | usb_stor_set_xfer_buf (buffer: ptr, buflen: sizeof info->sense_data, srb); |
815 | memset (info->sense_data, 0, sizeof info->sense_data); |
816 | |
817 | return USB_STOR_TRANSPORT_GOOD; |
818 | } |
819 | |
820 | memset (info->sense_data, 0, sizeof info->sense_data); |
821 | |
822 | /* |
823 | * Dummy up a response for INQUIRY since SDDR55 doesn't |
824 | * respond to INQUIRY commands |
825 | */ |
826 | |
827 | if (srb->cmnd[0] == INQUIRY) { |
828 | memcpy(ptr, inquiry_response, 8); |
829 | fill_inquiry_response(us, data: ptr, data_len: 36); |
830 | return USB_STOR_TRANSPORT_GOOD; |
831 | } |
832 | |
833 | /* |
834 | * only check card status if the map isn't allocated, ie no card seen yet |
835 | * or if it's been over half a second since we last accessed it |
836 | */ |
837 | if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) { |
838 | |
839 | /* check to see if a card is fitted */ |
840 | result = sddr55_status (us); |
841 | if (result) { |
842 | result = sddr55_status (us); |
843 | if (!result) { |
844 | set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */ |
845 | } |
846 | return USB_STOR_TRANSPORT_FAILED; |
847 | } |
848 | } |
849 | |
850 | /* |
851 | * if we detected a problem with the map when writing, |
852 | * don't allow any more access |
853 | */ |
854 | if (info->fatal_error) { |
855 | |
856 | set_sense_info (3, 0x31, 0); |
857 | return USB_STOR_TRANSPORT_FAILED; |
858 | } |
859 | |
860 | if (srb->cmnd[0] == READ_CAPACITY) { |
861 | |
862 | capacity = sddr55_get_capacity(us); |
863 | |
864 | if (!capacity) { |
865 | set_sense_info (3, 0x30, 0); /* incompatible medium */ |
866 | return USB_STOR_TRANSPORT_FAILED; |
867 | } |
868 | |
869 | info->capacity = capacity; |
870 | |
871 | /* |
872 | * figure out the maximum logical block number, allowing for |
873 | * the fact that only 250 out of every 256 are used |
874 | */ |
875 | info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250; |
876 | |
877 | /* |
878 | * Last page in the card, adjust as we only use 250 out of |
879 | * every 256 pages |
880 | */ |
881 | capacity = (capacity / 256) * 250; |
882 | |
883 | capacity /= PAGESIZE; |
884 | capacity--; |
885 | |
886 | ((__be32 *) ptr)[0] = cpu_to_be32(capacity); |
887 | ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE); |
888 | usb_stor_set_xfer_buf(buffer: ptr, buflen: 8, srb); |
889 | |
890 | sddr55_read_map(us); |
891 | |
892 | return USB_STOR_TRANSPORT_GOOD; |
893 | } |
894 | |
895 | if (srb->cmnd[0] == MODE_SENSE_10) { |
896 | |
897 | memcpy(ptr, mode_page_01, sizeof mode_page_01); |
898 | ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0; |
899 | usb_stor_set_xfer_buf(buffer: ptr, buflen: sizeof(mode_page_01), srb); |
900 | |
901 | if ( (srb->cmnd[2] & 0x3F) == 0x01 ) { |
902 | usb_stor_dbg(us, fmt: "Dummy up request for mode page 1\n" ); |
903 | return USB_STOR_TRANSPORT_GOOD; |
904 | |
905 | } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) { |
906 | usb_stor_dbg(us, fmt: "Dummy up request for all mode pages\n" ); |
907 | return USB_STOR_TRANSPORT_GOOD; |
908 | } |
909 | |
910 | set_sense_info (5, 0x24, 0); /* invalid field in command */ |
911 | return USB_STOR_TRANSPORT_FAILED; |
912 | } |
913 | |
914 | if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { |
915 | |
916 | usb_stor_dbg(us, fmt: "%s medium removal. Not that I can do anything about it...\n" , |
917 | (srb->cmnd[4]&0x03) ? "Prevent" : "Allow" ); |
918 | |
919 | return USB_STOR_TRANSPORT_GOOD; |
920 | |
921 | } |
922 | |
923 | if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) { |
924 | |
925 | page = short_pack(srb->cmnd[3], srb->cmnd[2]); |
926 | page <<= 16; |
927 | page |= short_pack(srb->cmnd[5], srb->cmnd[4]); |
928 | pages = short_pack(srb->cmnd[8], srb->cmnd[7]); |
929 | |
930 | page <<= info->smallpageshift; |
931 | |
932 | // convert page to block and page-within-block |
933 | |
934 | lba = page >> info->blockshift; |
935 | page = page & info->blockmask; |
936 | |
937 | // locate physical block corresponding to logical block |
938 | |
939 | if (lba >= info->max_log_blks) { |
940 | |
941 | usb_stor_dbg(us, fmt: "Error: Requested LBA %04X exceeds maximum block %04X\n" , |
942 | lba, info->max_log_blks - 1); |
943 | |
944 | set_sense_info (5, 0x24, 0); /* invalid field in command */ |
945 | |
946 | return USB_STOR_TRANSPORT_FAILED; |
947 | } |
948 | |
949 | pba = info->lba_to_pba[lba]; |
950 | |
951 | if (srb->cmnd[0] == WRITE_10) { |
952 | usb_stor_dbg(us, fmt: "WRITE_10: write block %04X (LBA %04X) page %01X pages %d\n" , |
953 | pba, lba, page, pages); |
954 | |
955 | return sddr55_write_data(us, lba, page, sectors: pages); |
956 | } else { |
957 | usb_stor_dbg(us, fmt: "READ_10: read block %04X (LBA %04X) page %01X pages %d\n" , |
958 | pba, lba, page, pages); |
959 | |
960 | return sddr55_read_data(us, lba, page, sectors: pages); |
961 | } |
962 | } |
963 | |
964 | |
965 | if (srb->cmnd[0] == TEST_UNIT_READY) { |
966 | return USB_STOR_TRANSPORT_GOOD; |
967 | } |
968 | |
969 | if (srb->cmnd[0] == START_STOP) { |
970 | return USB_STOR_TRANSPORT_GOOD; |
971 | } |
972 | |
973 | set_sense_info (5, 0x20, 0); /* illegal command */ |
974 | |
975 | return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer? |
976 | } |
977 | |
978 | static struct scsi_host_template sddr55_host_template; |
979 | |
980 | static int sddr55_probe(struct usb_interface *intf, |
981 | const struct usb_device_id *id) |
982 | { |
983 | struct us_data *us; |
984 | int result; |
985 | |
986 | result = usb_stor_probe1(pus: &us, intf, id, |
987 | unusual_dev: (id - sddr55_usb_ids) + sddr55_unusual_dev_list, |
988 | sht: &sddr55_host_template); |
989 | if (result) |
990 | return result; |
991 | |
992 | us->transport_name = "SDDR55" ; |
993 | us->transport = sddr55_transport; |
994 | us->transport_reset = sddr55_reset; |
995 | us->max_lun = 0; |
996 | |
997 | result = usb_stor_probe2(us); |
998 | return result; |
999 | } |
1000 | |
1001 | static struct usb_driver sddr55_driver = { |
1002 | .name = DRV_NAME, |
1003 | .probe = sddr55_probe, |
1004 | .disconnect = usb_stor_disconnect, |
1005 | .suspend = usb_stor_suspend, |
1006 | .resume = usb_stor_resume, |
1007 | .reset_resume = usb_stor_reset_resume, |
1008 | .pre_reset = usb_stor_pre_reset, |
1009 | .post_reset = usb_stor_post_reset, |
1010 | .id_table = sddr55_usb_ids, |
1011 | .soft_unbind = 1, |
1012 | .no_dynamic_id = 1, |
1013 | }; |
1014 | |
1015 | module_usb_stor_driver(sddr55_driver, sddr55_host_template, DRV_NAME); |
1016 | |