1 /* Driver for SanDisk SDDR-09 SmartMedia reader
2 *
3 * (c) 2000, 2001 Robert Baruch (autophile@starband.net)
4 * (c) 2002 Andries Brouwer (aeb@cwi.nl)
5 * Developed with the assistance of:
6 * (c) 2002 Alan Stern <stern@rowland.org>
7 *
8 * The SanDisk SDDR-09 SmartMedia reader uses the Shuttle EUSB-01 chip.
9 * This chip is a programmable USB controller. In the SDDR-09, it has
10 * been programmed to obey a certain limited set of SCSI commands.
11 * This driver translates the "real" SCSI commands to the SDDR-09 SCSI
12 * commands.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2, or (at your option) any
17 * later version.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 /*
30 * Known vendor commands: 12 bytes, first byte is opcode
31 *
32 * E7: read scatter gather
33 * E8: read
34 * E9: write
35 * EA: erase
36 * EB: reset
37 * EC: read status
38 * ED: read ID
39 * EE: write CIS (?)
40 * EF: compute checksum (?)
41 */
42
43 #include <linux/errno.h>
44 #include <linux/module.h>
45 #include <linux/slab.h>
46
47 #include <scsi/scsi.h>
48 #include <scsi/scsi_cmnd.h>
49 #include <scsi/scsi_device.h>
50
51 #include "usb.h"
52 #include "transport.h"
53 #include "protocol.h"
54 #include "debug.h"
55
56 MODULE_DESCRIPTION("Driver for SanDisk SDDR-09 SmartMedia reader");
57 MODULE_AUTHOR("Andries Brouwer <aeb@cwi.nl>, Robert Baruch <autophile@starband.net>");
58 MODULE_LICENSE("GPL");
59
60 static int usb_stor_sddr09_dpcm_init(struct us_data *us);
61 static int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us);
62 static int usb_stor_sddr09_init(struct us_data *us);
63
64
65 /*
66 * The table of devices
67 */
68 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
69 vendorName, productName, useProtocol, useTransport, \
70 initFunction, flags) \
71 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
72 .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
73
74 struct usb_device_id sddr09_usb_ids[] = {
75 # include "unusual_sddr09.h"
76 { } /* Terminating entry */
77 };
78 MODULE_DEVICE_TABLE(usb, sddr09_usb_ids);
79
80 #undef UNUSUAL_DEV
81
82 /*
83 * The flags table
84 */
85 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
86 vendor_name, product_name, use_protocol, use_transport, \
87 init_function, Flags) \
88 { \
89 .vendorName = vendor_name, \
90 .productName = product_name, \
91 .useProtocol = use_protocol, \
92 .useTransport = use_transport, \
93 .initFunction = init_function, \
94 }
95
96 static struct us_unusual_dev sddr09_unusual_dev_list[] = {
97 # include "unusual_sddr09.h"
98 { } /* Terminating entry */
99 };
100
101 #undef UNUSUAL_DEV
102
103
104 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
105 #define LSB_of(s) ((s)&0xFF)
106 #define MSB_of(s) ((s)>>8)
107
108 /* #define US_DEBUGP printk */
109
110 /*
111 * First some stuff that does not belong here:
112 * data on SmartMedia and other cards, completely
113 * unrelated to this driver.
114 * Similar stuff occurs in <linux/mtd/nand_ids.h>.
115 */
116
117 struct nand_flash_dev {
118 int model_id;
119 int chipshift; /* 1<<cs bytes total capacity */
120 char pageshift; /* 1<<ps bytes in a page */
121 char blockshift; /* 1<<bs pages in an erase block */
122 char zoneshift; /* 1<<zs blocks in a zone */
123 /* # of logical blocks is 125/128 of this */
124 char pageadrlen; /* length of an address in bytes - 1 */
125 };
126
127 /*
128 * NAND Flash Manufacturer ID Codes
129 */
130 #define NAND_MFR_AMD 0x01
131 #define NAND_MFR_NATSEMI 0x8f
132 #define NAND_MFR_TOSHIBA 0x98
133 #define NAND_MFR_SAMSUNG 0xec
134
135 static inline char *nand_flash_manufacturer(int manuf_id) {
136 switch(manuf_id) {
137 case NAND_MFR_AMD:
138 return "AMD";
139 case NAND_MFR_NATSEMI:
140 return "NATSEMI";
141 case NAND_MFR_TOSHIBA:
142 return "Toshiba";
143 case NAND_MFR_SAMSUNG:
144 return "Samsung";
145 default:
146 return "unknown";
147 }
148 }
149
150 /*
151 * It looks like it is unnecessary to attach manufacturer to the
152 * remaining data: SSFDC prescribes manufacturer-independent id codes.
153 *
154 * 256 MB NAND flash has a 5-byte ID with 2nd byte 0xaa, 0xba, 0xca or 0xda.
155 */
156
157 static struct nand_flash_dev nand_flash_ids[] = {
158 /* NAND flash */
159 { 0x6e, 20, 8, 4, 8, 2}, /* 1 MB */
160 { 0xe8, 20, 8, 4, 8, 2}, /* 1 MB */
161 { 0xec, 20, 8, 4, 8, 2}, /* 1 MB */
162 { 0x64, 21, 8, 4, 9, 2}, /* 2 MB */
163 { 0xea, 21, 8, 4, 9, 2}, /* 2 MB */
164 { 0x6b, 22, 9, 4, 9, 2}, /* 4 MB */
165 { 0xe3, 22, 9, 4, 9, 2}, /* 4 MB */
166 { 0xe5, 22, 9, 4, 9, 2}, /* 4 MB */
167 { 0xe6, 23, 9, 4, 10, 2}, /* 8 MB */
168 { 0x73, 24, 9, 5, 10, 2}, /* 16 MB */
169 { 0x75, 25, 9, 5, 10, 2}, /* 32 MB */
170 { 0x76, 26, 9, 5, 10, 3}, /* 64 MB */
171 { 0x79, 27, 9, 5, 10, 3}, /* 128 MB */
172
173 /* MASK ROM */
174 { 0x5d, 21, 9, 4, 8, 2}, /* 2 MB */
175 { 0xd5, 22, 9, 4, 9, 2}, /* 4 MB */
176 { 0xd6, 23, 9, 4, 10, 2}, /* 8 MB */
177 { 0x57, 24, 9, 4, 11, 2}, /* 16 MB */
178 { 0x58, 25, 9, 4, 12, 2}, /* 32 MB */
179 { 0,}
180 };
181
182 static struct nand_flash_dev *
183 nand_find_id(unsigned char id) {
184 int i;
185
186 for (i = 0; i < ARRAY_SIZE(nand_flash_ids); i++)
187 if (nand_flash_ids[i].model_id == id)
188 return &(nand_flash_ids[i]);
189 return NULL;
190 }
191
192 /*
193 * ECC computation.
194 */
195 static unsigned char parity[256];
196 static unsigned char ecc2[256];
197
198 static void nand_init_ecc(void) {
199 int i, j, a;
200
201 parity[0] = 0;
202 for (i = 1; i < 256; i++)
203 parity[i] = (parity[i&(i-1)] ^ 1);
204
205 for (i = 0; i < 256; i++) {
206 a = 0;
207 for (j = 0; j < 8; j++) {
208 if (i & (1<<j)) {
209 if ((j & 1) == 0)
210 a ^= 0x04;
211 if ((j & 2) == 0)
212 a ^= 0x10;
213 if ((j & 4) == 0)
214 a ^= 0x40;
215 }
216 }
217 ecc2[i] = ~(a ^ (a<<1) ^ (parity[i] ? 0xa8 : 0));
218 }
219 }
220
221 /* compute 3-byte ecc on 256 bytes */
222 static void nand_compute_ecc(unsigned char *data, unsigned char *ecc) {
223 int i, j, a;
224 unsigned char par, bit, bits[8];
225
226 par = 0;
227 for (j = 0; j < 8; j++)
228 bits[j] = 0;
229
230 /* collect 16 checksum bits */
231 for (i = 0; i < 256; i++) {
232 par ^= data[i];
233 bit = parity[data[i]];
234 for (j = 0; j < 8; j++)
235 if ((i & (1<<j)) == 0)
236 bits[j] ^= bit;
237 }
238
239 /* put 4+4+4 = 12 bits in the ecc */
240 a = (bits[3] << 6) + (bits[2] << 4) + (bits[1] << 2) + bits[0];
241 ecc[0] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0));
242
243 a = (bits[7] << 6) + (bits[6] << 4) + (bits[5] << 2) + bits[4];
244 ecc[1] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0));
245
246 ecc[2] = ecc2[par];
247 }
248
249 static int nand_compare_ecc(unsigned char *data, unsigned char *ecc) {
250 return (data[0] == ecc[0] && data[1] == ecc[1] && data[2] == ecc[2]);
251 }
252
253 static void nand_store_ecc(unsigned char *data, unsigned char *ecc) {
254 memcpy(data, ecc, 3);
255 }
256
257 /*
258 * The actual driver starts here.
259 */
260
261 struct sddr09_card_info {
262 unsigned long capacity; /* Size of card in bytes */
263 int pagesize; /* Size of page in bytes */
264 int pageshift; /* log2 of pagesize */
265 int blocksize; /* Size of block in pages */
266 int blockshift; /* log2 of blocksize */
267 int blockmask; /* 2^blockshift - 1 */
268 int *lba_to_pba; /* logical to physical map */
269 int *pba_to_lba; /* physical to logical map */
270 int lbact; /* number of available pages */
271 int flags;
272 #define SDDR09_WP 1 /* write protected */
273 };
274
275 /*
276 * On my 16MB card, control blocks have size 64 (16 real control bytes,
277 * and 48 junk bytes). In reality of course the card uses 16 control bytes,
278 * so the reader makes up the remaining 48. Don't know whether these numbers
279 * depend on the card. For now a constant.
280 */
281 #define CONTROL_SHIFT 6
282
283 /*
284 * On my Combo CF/SM reader, the SM reader has LUN 1.
285 * (and things fail with LUN 0).
286 * It seems LUN is irrelevant for others.
287 */
288 #define LUN 1
289 #define LUNBITS (LUN << 5)
290
291 /*
292 * LBA and PBA are unsigned ints. Special values.
293 */
294 #define UNDEF 0xffffffff
295 #define SPARE 0xfffffffe
296 #define UNUSABLE 0xfffffffd
297
298 static const int erase_bad_lba_entries = 0;
299
300 /* send vendor interface command (0x41) */
301 /* called for requests 0, 1, 8 */
302 static int
303 sddr09_send_command(struct us_data *us,
304 unsigned char request,
305 unsigned char direction,
306 unsigned char *xfer_data,
307 unsigned int xfer_len) {
308 unsigned int pipe;
309 unsigned char requesttype = (0x41 | direction);
310 int rc;
311
312 // Get the receive or send control pipe number
313
314 if (direction == USB_DIR_IN)
315 pipe = us->recv_ctrl_pipe;
316 else
317 pipe = us->send_ctrl_pipe;
318
319 rc = usb_stor_ctrl_transfer(us, pipe, request, requesttype,
320 0, 0, xfer_data, xfer_len);
321 switch (rc) {
322 case USB_STOR_XFER_GOOD: return 0;
323 case USB_STOR_XFER_STALLED: return -EPIPE;
324 default: return -EIO;
325 }
326 }
327
328 static int
329 sddr09_send_scsi_command(struct us_data *us,
330 unsigned char *command,
331 unsigned int command_len) {
332 return sddr09_send_command(us, 0, USB_DIR_OUT, command, command_len);
333 }
334
335 #if 0
336 /*
337 * Test Unit Ready Command: 12 bytes.
338 * byte 0: opcode: 00
339 */
340 static int
341 sddr09_test_unit_ready(struct us_data *us) {
342 unsigned char *command = us->iobuf;
343 int result;
344
345 memset(command, 0, 6);
346 command[1] = LUNBITS;
347
348 result = sddr09_send_scsi_command(us, command, 6);
349
350 US_DEBUGP("sddr09_test_unit_ready returns %d\n", result);
351
352 return result;
353 }
354 #endif
355
356 /*
357 * Request Sense Command: 12 bytes.
358 * byte 0: opcode: 03
359 * byte 4: data length
360 */
361 static int
362 sddr09_request_sense(struct us_data *us, unsigned char *sensebuf, int buflen) {
363 unsigned char *command = us->iobuf;
364 int result;
365
366 memset(command, 0, 12);
367 command[0] = 0x03;
368 command[1] = LUNBITS;
369 command[4] = buflen;
370
371 result = sddr09_send_scsi_command(us, command, 12);
372 if (result)
373 return result;
374
375 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
376 sensebuf, buflen, NULL);
377 return (result == USB_STOR_XFER_GOOD ? 0 : -EIO);
378 }
379
380 /*
381 * Read Command: 12 bytes.
382 * byte 0: opcode: E8
383 * byte 1: last two bits: 00: read data, 01: read blockwise control,
384 * 10: read both, 11: read pagewise control.
385 * It turns out we need values 20, 21, 22, 23 here (LUN 1).
386 * bytes 2-5: address (interpretation depends on byte 1, see below)
387 * bytes 10-11: count (idem)
388 *
389 * A page has 512 data bytes and 64 control bytes (16 control and 48 junk).
390 * A read data command gets data in 512-byte pages.
391 * A read control command gets control in 64-byte chunks.
392 * A read both command gets data+control in 576-byte chunks.
393 *
394 * Blocks are groups of 32 pages, and read blockwise control jumps to the
395 * next block, while read pagewise control jumps to the next page after
396 * reading a group of 64 control bytes.
397 * [Here 512 = 1<<pageshift, 32 = 1<<blockshift, 64 is constant?]
398 *
399 * (1 MB and 2 MB cards are a bit different, but I have only a 16 MB card.)
400 */
401
402 static int
403 sddr09_readX(struct us_data *us, int x, unsigned long fromaddress,
404 int nr_of_pages, int bulklen, unsigned char *buf,
405 int use_sg) {
406
407 unsigned char *command = us->iobuf;
408 int result;
409
410 command[0] = 0xE8;
411 command[1] = LUNBITS | x;
412 command[2] = MSB_of(fromaddress>>16);
413 command[3] = LSB_of(fromaddress>>16);
414 command[4] = MSB_of(fromaddress & 0xFFFF);
415 command[5] = LSB_of(fromaddress & 0xFFFF);
416 command[6] = 0;
417 command[7] = 0;
418 command[8] = 0;
419 command[9] = 0;
420 command[10] = MSB_of(nr_of_pages);
421 command[11] = LSB_of(nr_of_pages);
422
423 result = sddr09_send_scsi_command(us, command, 12);
424
425 if (result) {
426 US_DEBUGP("Result for send_control in sddr09_read2%d %d\n",
427 x, result);
428 return result;
429 }
430
431 result = usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe,
432 buf, bulklen, use_sg, NULL);
433
434 if (result != USB_STOR_XFER_GOOD) {
435 US_DEBUGP("Result for bulk_transfer in sddr09_read2%d %d\n",
436 x, result);
437 return -EIO;
438 }
439 return 0;
440 }
441
442 /*
443 * Read Data
444 *
445 * fromaddress counts data shorts:
446 * increasing it by 256 shifts the bytestream by 512 bytes;
447 * the last 8 bits are ignored.
448 *
449 * nr_of_pages counts pages of size (1 << pageshift).
450 */
451 static int
452 sddr09_read20(struct us_data *us, unsigned long fromaddress,
453 int nr_of_pages, int pageshift, unsigned char *buf, int use_sg) {
454 int bulklen = nr_of_pages << pageshift;
455
456 /* The last 8 bits of fromaddress are ignored. */
457 return sddr09_readX(us, 0, fromaddress, nr_of_pages, bulklen,
458 buf, use_sg);
459 }
460
461 /*
462 * Read Blockwise Control
463 *
464 * fromaddress gives the starting position (as in read data;
465 * the last 8 bits are ignored); increasing it by 32*256 shifts
466 * the output stream by 64 bytes.
467 *
468 * count counts control groups of size (1 << controlshift).
469 * For me, controlshift = 6. Is this constant?
470 *
471 * After getting one control group, jump to the next block
472 * (fromaddress += 8192).
473 */
474 static int
475 sddr09_read21(struct us_data *us, unsigned long fromaddress,
476 int count, int controlshift, unsigned char *buf, int use_sg) {
477
478 int bulklen = (count << controlshift);
479 return sddr09_readX(us, 1, fromaddress, count, bulklen,
480 buf, use_sg);
481 }
482
483 /*
484 * Read both Data and Control
485 *
486 * fromaddress counts data shorts, ignoring control:
487 * increasing it by 256 shifts the bytestream by 576 = 512+64 bytes;
488 * the last 8 bits are ignored.
489 *
490 * nr_of_pages counts pages of size (1 << pageshift) + (1 << controlshift).
491 */
492 static int
493 sddr09_read22(struct us_data *us, unsigned long fromaddress,
494 int nr_of_pages, int pageshift, unsigned char *buf, int use_sg) {
495
496 int bulklen = (nr_of_pages << pageshift) + (nr_of_pages << CONTROL_SHIFT);
497 US_DEBUGP("sddr09_read22: reading %d pages, %d bytes\n",
498 nr_of_pages, bulklen);
499 return sddr09_readX(us, 2, fromaddress, nr_of_pages, bulklen,
500 buf, use_sg);
501 }
502
503 #if 0
504 /*
505 * Read Pagewise Control
506 *
507 * fromaddress gives the starting position (as in read data;
508 * the last 8 bits are ignored); increasing it by 256 shifts
509 * the output stream by 64 bytes.
510 *
511 * count counts control groups of size (1 << controlshift).
512 * For me, controlshift = 6. Is this constant?
513 *
514 * After getting one control group, jump to the next page
515 * (fromaddress += 256).
516 */
517 static int
518 sddr09_read23(struct us_data *us, unsigned long fromaddress,
519 int count, int controlshift, unsigned char *buf, int use_sg) {
520
521 int bulklen = (count << controlshift);
522 return sddr09_readX(us, 3, fromaddress, count, bulklen,
523 buf, use_sg);
524 }
525 #endif
526
527 /*
528 * Erase Command: 12 bytes.
529 * byte 0: opcode: EA
530 * bytes 6-9: erase address (big-endian, counting shorts, sector aligned).
531 *
532 * Always precisely one block is erased; bytes 2-5 and 10-11 are ignored.
533 * The byte address being erased is 2*Eaddress.
534 * The CIS cannot be erased.
535 */
536 static int
537 sddr09_erase(struct us_data *us, unsigned long Eaddress) {
538 unsigned char *command = us->iobuf;
539 int result;
540
541 US_DEBUGP("sddr09_erase: erase address %lu\n", Eaddress);
542
543 memset(command, 0, 12);
544 command[0] = 0xEA;
545 command[1] = LUNBITS;
546 command[6] = MSB_of(Eaddress>>16);
547 command[7] = LSB_of(Eaddress>>16);
548 command[8] = MSB_of(Eaddress & 0xFFFF);
549 command[9] = LSB_of(Eaddress & 0xFFFF);
550
551 result = sddr09_send_scsi_command(us, command, 12);
552
553 if (result)
554 US_DEBUGP("Result for send_control in sddr09_erase %d\n",
555 result);
556
557 return result;
558 }
559
560 /*
561 * Write CIS Command: 12 bytes.
562 * byte 0: opcode: EE
563 * bytes 2-5: write address in shorts
564 * bytes 10-11: sector count
565 *
566 * This writes at the indicated address. Don't know how it differs
567 * from E9. Maybe it does not erase? However, it will also write to
568 * the CIS.
569 *
570 * When two such commands on the same page follow each other directly,
571 * the second one is not done.
572 */
573
574 /*
575 * Write Command: 12 bytes.
576 * byte 0: opcode: E9
577 * bytes 2-5: write address (big-endian, counting shorts, sector aligned).
578 * bytes 6-9: erase address (big-endian, counting shorts, sector aligned).
579 * bytes 10-11: sector count (big-endian, in 512-byte sectors).
580 *
581 * If write address equals erase address, the erase is done first,
582 * otherwise the write is done first. When erase address equals zero
583 * no erase is done?
584 */
585 static int
586 sddr09_writeX(struct us_data *us,
587 unsigned long Waddress, unsigned long Eaddress,
588 int nr_of_pages, int bulklen, unsigned char *buf, int use_sg) {
589
590 unsigned char *command = us->iobuf;
591 int result;
592
593 command[0] = 0xE9;
594 command[1] = LUNBITS;
595
596 command[2] = MSB_of(Waddress>>16);
597 command[3] = LSB_of(Waddress>>16);
598 command[4] = MSB_of(Waddress & 0xFFFF);
599 command[5] = LSB_of(Waddress & 0xFFFF);
600
601 command[6] = MSB_of(Eaddress>>16);
602 command[7] = LSB_of(Eaddress>>16);
603 command[8] = MSB_of(Eaddress & 0xFFFF);
604 command[9] = LSB_of(Eaddress & 0xFFFF);
605
606 command[10] = MSB_of(nr_of_pages);
607 command[11] = LSB_of(nr_of_pages);
608
609 result = sddr09_send_scsi_command(us, command, 12);
610
611 if (result) {
612 US_DEBUGP("Result for send_control in sddr09_writeX %d\n",
613 result);
614 return result;
615 }
616
617 result = usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe,
618 buf, bulklen, use_sg, NULL);
619
620 if (result != USB_STOR_XFER_GOOD) {
621 US_DEBUGP("Result for bulk_transfer in sddr09_writeX %d\n",
622 result);
623 return -EIO;
624 }
625 return 0;
626 }
627
628 /* erase address, write same address */
629 static int
630 sddr09_write_inplace(struct us_data *us, unsigned long address,
631 int nr_of_pages, int pageshift, unsigned char *buf,
632 int use_sg) {
633 int bulklen = (nr_of_pages << pageshift) + (nr_of_pages << CONTROL_SHIFT);
634 return sddr09_writeX(us, address, address, nr_of_pages, bulklen,
635 buf, use_sg);
636 }
637
638 #if 0
639 /*
640 * Read Scatter Gather Command: 3+4n bytes.
641 * byte 0: opcode E7
642 * byte 2: n
643 * bytes 4i-1,4i,4i+1: page address
644 * byte 4i+2: page count
645 * (i=1..n)
646 *
647 * This reads several pages from the card to a single memory buffer.
648 * The last two bits of byte 1 have the same meaning as for E8.
649 */
650 static int
651 sddr09_read_sg_test_only(struct us_data *us) {
652 unsigned char *command = us->iobuf;
653 int result, bulklen, nsg, ct;
654 unsigned char *buf;
655 unsigned long address;
656
657 nsg = bulklen = 0;
658 command[0] = 0xE7;
659 command[1] = LUNBITS;
660 command[2] = 0;
661 address = 040000; ct = 1;
662 nsg++;
663 bulklen += (ct << 9);
664 command[4*nsg+2] = ct;
665 command[4*nsg+1] = ((address >> 9) & 0xFF);
666 command[4*nsg+0] = ((address >> 17) & 0xFF);
667 command[4*nsg-1] = ((address >> 25) & 0xFF);
668
669 address = 0340000; ct = 1;
670 nsg++;
671 bulklen += (ct << 9);
672 command[4*nsg+2] = ct;
673 command[4*nsg+1] = ((address >> 9) & 0xFF);
674 command[4*nsg+0] = ((address >> 17) & 0xFF);
675 command[4*nsg-1] = ((address >> 25) & 0xFF);
676
677 address = 01000000; ct = 2;
678 nsg++;
679 bulklen += (ct << 9);
680 command[4*nsg+2] = ct;
681 command[4*nsg+1] = ((address >> 9) & 0xFF);
682 command[4*nsg+0] = ((address >> 17) & 0xFF);
683 command[4*nsg-1] = ((address >> 25) & 0xFF);
684
685 command[2] = nsg;
686
687 result = sddr09_send_scsi_command(us, command, 4*nsg+3);
688
689 if (result) {
690 US_DEBUGP("Result for send_control in sddr09_read_sg %d\n",
691 result);
692 return result;
693 }
694
695 buf = kmalloc(bulklen, GFP_NOIO);
696 if (!buf)
697 return -ENOMEM;
698
699 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
700 buf, bulklen, NULL);
701 kfree(buf);
702 if (result != USB_STOR_XFER_GOOD) {
703 US_DEBUGP("Result for bulk_transfer in sddr09_read_sg %d\n",
704 result);
705 return -EIO;
706 }
707
708 return 0;
709 }
710 #endif
711
712 /*
713 * Read Status Command: 12 bytes.
714 * byte 0: opcode: EC
715 *
716 * Returns 64 bytes, all zero except for the first.
717 * bit 0: 1: Error
718 * bit 5: 1: Suspended
719 * bit 6: 1: Ready
720 * bit 7: 1: Not write-protected
721 */
722
723 static int
724 sddr09_read_status(struct us_data *us, unsigned char *status) {
725
726 unsigned char *command = us->iobuf;
727 unsigned char *data = us->iobuf;
728 int result;
729
730 US_DEBUGP("Reading status...\n");
731
732 memset(command, 0, 12);
733 command[0] = 0xEC;
734 command[1] = LUNBITS;
735
736 result = sddr09_send_scsi_command(us, command, 12);
737 if (result)
738 return result;
739
740 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
741 data, 64, NULL);
742 *status = data[0];
743 return (result == USB_STOR_XFER_GOOD ? 0 : -EIO);
744 }
745
746 static int
747 sddr09_read_data(struct us_data *us,
748 unsigned long address,
749 unsigned int sectors) {
750
751 struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
752 unsigned char *buffer;
753 unsigned int lba, maxlba, pba;
754 unsigned int page, pages;
755 unsigned int len, offset;
756 struct scatterlist *sg;
757 int result;
758
759 // Figure out the initial LBA and page
760 lba = address >> info->blockshift;
761 page = (address & info->blockmask);
762 maxlba = info->capacity >> (info->pageshift + info->blockshift);
763 if (lba >= maxlba)
764 return -EIO;
765
766 // Since we only read in one block at a time, we have to create
767 // a bounce buffer and move the data a piece at a time between the
768 // bounce buffer and the actual transfer buffer.
769
770 len = min(sectors, (unsigned int) info->blocksize) * info->pagesize;
771 buffer = kmalloc(len, GFP_NOIO);
772 if (buffer == NULL) {
773 printk(KERN_WARNING "sddr09_read_data: Out of memory\n");
774 return -ENOMEM;
775 }
776
777 // This could be made much more efficient by checking for
778 // contiguous LBA's. Another exercise left to the student.
779
780 result = 0;
781 offset = 0;
782 sg = NULL;
783
784 while (sectors > 0) {
785
786 /* Find number of pages we can read in this block */
787 pages = min(sectors, info->blocksize - page);
788 len = pages << info->pageshift;
789
790 /* Not overflowing capacity? */
791 if (lba >= maxlba) {
792 US_DEBUGP("Error: Requested lba %u exceeds "
793 "maximum %u\n", lba, maxlba);
794 result = -EIO;
795 break;
796 }
797
798 /* Find where this lba lives on disk */
799 pba = info->lba_to_pba[lba];
800
801 if (pba == UNDEF) { /* this lba was never written */
802
803 US_DEBUGP("Read %d zero pages (LBA %d) page %d\n",
804 pages, lba, page);
805
806 /* This is not really an error. It just means
807 that the block has never been written.
808 Instead of returning an error
809 it is better to return all zero data. */
810
811 memset(buffer, 0, len);
812
813 } else {
814 US_DEBUGP("Read %d pages, from PBA %d"
815 " (LBA %d) page %d\n",
816 pages, pba, lba, page);
817
818 address = ((pba << info->blockshift) + page) <<
819 info->pageshift;
820
821 result = sddr09_read20(us, address>>1,
822 pages, info->pageshift, buffer, 0);
823 if (result)
824 break;
825 }
826
827 // Store the data in the transfer buffer
828 usb_stor_access_xfer_buf(buffer, len, us->srb,
829 &sg, &offset, TO_XFER_BUF);
830
831 page = 0;
832 lba++;
833 sectors -= pages;
834 }
835
836 kfree(buffer);
837 return result;
838 }
839
840 static unsigned int
841 sddr09_find_unused_pba(struct sddr09_card_info *info, unsigned int lba) {
842 static unsigned int lastpba = 1;
843 int zonestart, end, i;
844
845 zonestart = (lba/1000) << 10;
846 end = info->capacity >> (info->blockshift + info->pageshift);
847 end -= zonestart;
848 if (end > 1024)
849 end = 1024;
850
851 for (i = lastpba+1; i < end; i++) {
852 if (info->pba_to_lba[zonestart+i] == UNDEF) {
853 lastpba = i;
854 return zonestart+i;
855 }
856 }
857 for (i = 0; i <= lastpba; i++) {
858 if (info->pba_to_lba[zonestart+i] == UNDEF) {
859 lastpba = i;
860 return zonestart+i;
861 }
862 }
863 return 0;
864 }
865
866 static int
867 sddr09_write_lba(struct us_data *us, unsigned int lba,
868 unsigned int page, unsigned int pages,
869 unsigned char *ptr, unsigned char *blockbuffer) {
870
871 struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
872 unsigned long address;
873 unsigned int pba, lbap;
874 unsigned int pagelen;
875 unsigned char *bptr, *cptr, *xptr;
876 unsigned char ecc[3];
877 int i, result, isnew;
878
879 lbap = ((lba % 1000) << 1) | 0x1000;
880 if (parity[MSB_of(lbap) ^ LSB_of(lbap)])
881 lbap ^= 1;
882 pba = info->lba_to_pba[lba];
883 isnew = 0;
884
885 if (pba == UNDEF) {
886 pba = sddr09_find_unused_pba(info, lba);
887 if (!pba) {
888 printk(KERN_WARNING
889 "sddr09_write_lba: Out of unused blocks\n");
890 return -ENOSPC;
891 }
892 info->pba_to_lba[pba] = lba;
893 info->lba_to_pba[lba] = pba;
894 isnew = 1;
895 }
896
897 if (pba == 1) {
898 /* Maybe it is impossible to write to PBA 1.
899 Fake success, but don't do anything. */
900 printk(KERN_WARNING "sddr09: avoid writing to pba 1\n");
901 return 0;
902 }
903
904 pagelen = (1 << info->pageshift) + (1 << CONTROL_SHIFT);
905
906 /* read old contents */
907 address = (pba << (info->pageshift + info->blockshift));
908 result = sddr09_read22(us, address>>1, info->blocksize,
909 info->pageshift, blockbuffer, 0);
910 if (result)
911 return result;
912
913 /* check old contents and fill lba */
914 for (i = 0; i < info->blocksize; i++) {
915 bptr = blockbuffer + i*pagelen;
916 cptr = bptr + info->pagesize;
917 nand_compute_ecc(bptr, ecc);
918 if (!nand_compare_ecc(cptr+13, ecc)) {
919 US_DEBUGP("Warning: bad ecc in page %d- of pba %d\n",
920 i, pba);
921 nand_store_ecc(cptr+13, ecc);
922 }
923 nand_compute_ecc(bptr+(info->pagesize / 2), ecc);
924 if (!nand_compare_ecc(cptr+8, ecc)) {
925 US_DEBUGP("Warning: bad ecc in page %d+ of pba %d\n",
926 i, pba);
927 nand_store_ecc(cptr+8, ecc);
928 }
929 cptr[6] = cptr[11] = MSB_of(lbap);
930 cptr[7] = cptr[12] = LSB_of(lbap);
931 }
932
933 /* copy in new stuff and compute ECC */
934 xptr = ptr;
935 for (i = page; i < page+pages; i++) {
936 bptr = blockbuffer + i*pagelen;
937 cptr = bptr + info->pagesize;
938 memcpy(bptr, xptr, info->pagesize);
939 xptr += info->pagesize;
940 nand_compute_ecc(bptr, ecc);
941 nand_store_ecc(cptr+13, ecc);
942 nand_compute_ecc(bptr+(info->pagesize / 2), ecc);
943 nand_store_ecc(cptr+8, ecc);
944 }
945
946 US_DEBUGP("Rewrite PBA %d (LBA %d)\n", pba, lba);
947
948 result = sddr09_write_inplace(us, address>>1, info->blocksize,
949 info->pageshift, blockbuffer, 0);
950
951 US_DEBUGP("sddr09_write_inplace returns %d\n", result);
952
953 #if 0
954 {
955 unsigned char status = 0;
956 int result2 = sddr09_read_status(us, &status);
957 if (result2)
958 US_DEBUGP("sddr09_write_inplace: cannot read status\n");
959 else if (status != 0xc0)
960 US_DEBUGP("sddr09_write_inplace: status after write: 0x%x\n",
961 status);
962 }
963 #endif
964
965 #if 0
966 {
967 int result2 = sddr09_test_unit_ready(us);
968 }
969 #endif
970
971 return result;
972 }
973
974 static int
975 sddr09_write_data(struct us_data *us,
976 unsigned long address,
977 unsigned int sectors) {
978
979 struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
980 unsigned int lba, maxlba, page, pages;
981 unsigned int pagelen, blocklen;
982 unsigned char *blockbuffer;
983 unsigned char *buffer;
984 unsigned int len, offset;
985 struct scatterlist *sg;
986 int result;
987
988 // Figure out the initial LBA and page
989 lba = address >> info->blockshift;
990 page = (address & info->blockmask);
991 maxlba = info->capacity >> (info->pageshift + info->blockshift);
992 if (lba >= maxlba)
993 return -EIO;
994
995 // blockbuffer is used for reading in the old data, overwriting
996 // with the new data, and performing ECC calculations
997
998 /* TODO: instead of doing kmalloc/kfree for each write,
999 add a bufferpointer to the info structure */
1000
1001 pagelen = (1 << info->pageshift) + (1 << CONTROL_SHIFT);
1002 blocklen = (pagelen << info->blockshift);
1003 blockbuffer = kmalloc(blocklen, GFP_NOIO);
1004 if (!blockbuffer) {
1005 printk(KERN_WARNING "sddr09_write_data: Out of memory\n");
1006 return -ENOMEM;
1007 }
1008
1009 // Since we don't write the user data directly to the device,
1010 // we have to create a bounce buffer and move the data a piece
1011 // at a time between the bounce buffer and the actual transfer buffer.
1012
1013 len = min(sectors, (unsigned int) info->blocksize) * info->pagesize;
1014 buffer = kmalloc(len, GFP_NOIO);
1015 if (buffer == NULL) {
1016 printk(KERN_WARNING "sddr09_write_data: Out of memory\n");
1017 kfree(blockbuffer);
1018 return -ENOMEM;
1019 }
1020
1021 result = 0;
1022 offset = 0;
1023 sg = NULL;
1024
1025 while (sectors > 0) {
1026
1027 // Write as many sectors as possible in this block
1028
1029 pages = min(sectors, info->blocksize - page);
1030 len = (pages << info->pageshift);
1031
1032 /* Not overflowing capacity? */
1033 if (lba >= maxlba) {
1034 US_DEBUGP("Error: Requested lba %u exceeds "
1035 "maximum %u\n", lba, maxlba);
1036 result = -EIO;
1037 break;
1038 }
1039
1040 // Get the data from the transfer buffer
1041 usb_stor_access_xfer_buf(buffer, len, us->srb,
1042 &sg, &offset, FROM_XFER_BUF);
1043
1044 result = sddr09_write_lba(us, lba, page, pages,
1045 buffer, blockbuffer);
1046 if (result)
1047 break;
1048
1049 page = 0;
1050 lba++;
1051 sectors -= pages;
1052 }
1053
1054 kfree(buffer);
1055 kfree(blockbuffer);
1056
1057 return result;
1058 }
1059
1060 static int
1061 sddr09_read_control(struct us_data *us,
1062 unsigned long address,
1063 unsigned int blocks,
1064 unsigned char *content,
1065 int use_sg) {
1066
1067 US_DEBUGP("Read control address %lu, blocks %d\n",
1068 address, blocks);
1069
1070 return sddr09_read21(us, address, blocks,
1071 CONTROL_SHIFT, content, use_sg);
1072 }
1073
1074 /*
1075 * Read Device ID Command: 12 bytes.
1076 * byte 0: opcode: ED
1077 *
1078 * Returns 2 bytes: Manufacturer ID and Device ID.
1079 * On more recent cards 3 bytes: the third byte is an option code A5
1080 * signifying that the secret command to read an 128-bit ID is available.
1081 * On still more recent cards 4 bytes: the fourth byte C0 means that
1082 * a second read ID cmd is available.
1083 */
1084 static int
1085 sddr09_read_deviceID(struct us_data *us, unsigned char *deviceID) {
1086 unsigned char *command = us->iobuf;
1087 unsigned char *content = us->iobuf;
1088 int result, i;
1089
1090 memset(command, 0, 12);
1091 command[0] = 0xED;
1092 command[1] = LUNBITS;
1093
1094 result = sddr09_send_scsi_command(us, command, 12);
1095 if (result)
1096 return result;
1097
1098 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
1099 content, 64, NULL);
1100
1101 for (i = 0; i < 4; i++)
1102 deviceID[i] = content[i];
1103
1104 return (result == USB_STOR_XFER_GOOD ? 0 : -EIO);
1105 }
1106
1107 static int
1108 sddr09_get_wp(struct us_data *us, struct sddr09_card_info *info) {
1109 int result;
1110 unsigned char status;
1111
1112 result = sddr09_read_status(us, &status);
1113 if (result) {
1114 US_DEBUGP("sddr09_get_wp: read_status fails\n");
1115 return result;
1116 }
1117 US_DEBUGP("sddr09_get_wp: status 0x%02X", status);
1118 if ((status & 0x80) == 0) {
1119 info->flags |= SDDR09_WP; /* write protected */
1120 US_DEBUGP(" WP");
1121 }
1122 if (status & 0x40)
1123 US_DEBUGP(" Ready");
1124 if (status & LUNBITS)
1125 US_DEBUGP(" Suspended");
1126 if (status & 0x1)
1127 US_DEBUGP(" Error");
1128 US_DEBUGP("\n");
1129 return 0;
1130 }
1131
1132 #if 0
1133 /*
1134 * Reset Command: 12 bytes.
1135 * byte 0: opcode: EB
1136 */
1137 static int
1138 sddr09_reset(struct us_data *us) {
1139
1140 unsigned char *command = us->iobuf;
1141
1142 memset(command, 0, 12);
1143 command[0] = 0xEB;
1144 command[1] = LUNBITS;
1145
1146 return sddr09_send_scsi_command(us, command, 12);
1147 }
1148 #endif
1149
1150 static struct nand_flash_dev *
1151 sddr09_get_cardinfo(struct us_data *us, unsigned char flags) {
1152 struct nand_flash_dev *cardinfo;
1153 unsigned char deviceID[4];
1154 char blurbtxt[256];
1155 int result;
1156
1157 US_DEBUGP("Reading capacity...\n");
1158
1159 result = sddr09_read_deviceID(us, deviceID);
1160
1161 if (result) {
1162 US_DEBUGP("Result of read_deviceID is %d\n", result);
1163 printk(KERN_WARNING "sddr09: could not read card info\n");
1164 return NULL;
1165 }
1166
1167 sprintf(blurbtxt, "sddr09: Found Flash card, ID = %02X %02X %02X %02X",
1168 deviceID[0], deviceID[1], deviceID[2], deviceID[3]);
1169
1170 /* Byte 0 is the manufacturer */
1171 sprintf(blurbtxt + strlen(blurbtxt),
1172 ": Manuf. %s",
1173 nand_flash_manufacturer(deviceID[0]));
1174
1175 /* Byte 1 is the device type */
1176 cardinfo = nand_find_id(deviceID[1]);
1177 if (cardinfo) {
1178 /* MB or MiB? It is neither. A 16 MB card has
1179 17301504 raw bytes, of which 16384000 are
1180 usable for user data. */
1181 sprintf(blurbtxt + strlen(blurbtxt),
1182 ", %d MB", 1<<(cardinfo->chipshift - 20));
1183 } else {
1184 sprintf(blurbtxt + strlen(blurbtxt),
1185 ", type unrecognized");
1186 }
1187
1188 /* Byte 2 is code to signal availability of 128-bit ID */
1189 if (deviceID[2] == 0xa5) {
1190 sprintf(blurbtxt + strlen(blurbtxt),
1191 ", 128-bit ID");
1192 }
1193
1194 /* Byte 3 announces the availability of another read ID command */
1195 if (deviceID[3] == 0xc0) {
1196 sprintf(blurbtxt + strlen(blurbtxt),
1197 ", extra cmd");
1198 }
1199
1200 if (flags & SDDR09_WP)
1201 sprintf(blurbtxt + strlen(blurbtxt),
1202 ", WP");
1203
1204 printk(KERN_WARNING "%s\n", blurbtxt);
1205
1206 return cardinfo;
1207 }
1208
1209 static int
1210 sddr09_read_map(struct us_data *us) {
1211
1212 struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
1213 int numblocks, alloc_len, alloc_blocks;
1214 int i, j, result;
1215 unsigned char *buffer, *buffer_end, *ptr;
1216 unsigned int lba, lbact;
1217
1218 if (!info->capacity)
1219 return -1;
1220
1221 // size of a block is 1 << (blockshift + pageshift) bytes
1222 // divide into the total capacity to get the number of blocks
1223
1224 numblocks = info->capacity >> (info->blockshift + info->pageshift);
1225
1226 // read 64 bytes for every block (actually 1 << CONTROL_SHIFT)
1227 // but only use a 64 KB buffer
1228 // buffer size used must be a multiple of (1 << CONTROL_SHIFT)
1229 #define SDDR09_READ_MAP_BUFSZ 65536
1230
1231 alloc_blocks = min(numblocks, SDDR09_READ_MAP_BUFSZ >> CONTROL_SHIFT);
1232 alloc_len = (alloc_blocks << CONTROL_SHIFT);
1233 buffer = kmalloc(alloc_len, GFP_NOIO);
1234 if (buffer == NULL) {
1235 printk(KERN_WARNING "sddr09_read_map: out of memory\n");
1236 result = -1;
1237 goto done;
1238 }
1239 buffer_end = buffer + alloc_len;
1240
1241 #undef SDDR09_READ_MAP_BUFSZ
1242
1243 kfree(info->lba_to_pba);
1244 kfree(info->pba_to_lba);
1245 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
1246 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
1247
1248 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
1249 printk(KERN_WARNING "sddr09_read_map: out of memory\n");
1250 result = -1;
1251 goto done;
1252 }
1253
1254 for (i = 0; i < numblocks; i++)
1255 info->lba_to_pba[i] = info->pba_to_lba[i] = UNDEF;
1256
1257 /*
1258 * Define lba-pba translation table
1259 */
1260
1261 ptr = buffer_end;
1262 for (i = 0; i < numblocks; i++) {
1263 ptr += (1 << CONTROL_SHIFT);
1264 if (ptr >= buffer_end) {
1265 unsigned long address;
1266
1267 address = i << (info->pageshift + info->blockshift);
1268 result = sddr09_read_control(
1269 us, address>>1,
1270 min(alloc_blocks, numblocks - i),
1271 buffer, 0);
1272 if (result) {
1273 result = -1;
1274 goto done;
1275 }
1276 ptr = buffer;
1277 }
1278
1279 if (i == 0 || i == 1) {
1280 info->pba_to_lba[i] = UNUSABLE;
1281 continue;
1282 }
1283
1284 /* special PBAs have control field 0^16 */
1285 for (j = 0; j < 16; j++)
1286 if (ptr[j] != 0)
1287 goto nonz;
1288 info->pba_to_lba[i] = UNUSABLE;
1289 printk(KERN_WARNING "sddr09: PBA %d has no logical mapping\n",
1290 i);
1291 continue;
1292
1293 nonz:
1294 /* unwritten PBAs have control field FF^16 */
1295 for (j = 0; j < 16; j++)
1296 if (ptr[j] != 0xff)
1297 goto nonff;
1298 continue;
1299
1300 nonff:
1301 /* normal PBAs start with six FFs */
1302 if (j < 6) {
1303 printk(KERN_WARNING
1304 "sddr09: PBA %d has no logical mapping: "
1305 "reserved area = %02X%02X%02X%02X "
1306 "data status %02X block status %02X\n",
1307 i, ptr[0], ptr[1], ptr[2], ptr[3],
1308 ptr[4], ptr[5]);
1309 info->pba_to_lba[i] = UNUSABLE;
1310 continue;
1311 }
1312
1313 if ((ptr[6] >> 4) != 0x01) {
1314 printk(KERN_WARNING
1315 "sddr09: PBA %d has invalid address field "
1316 "%02X%02X/%02X%02X\n",
1317 i, ptr[6], ptr[7], ptr[11], ptr[12]);
1318 info->pba_to_lba[i] = UNUSABLE;
1319 continue;
1320 }
1321
1322 /* check even parity */
1323 if (parity[ptr[6] ^ ptr[7]]) {
1324 printk(KERN_WARNING
1325 "sddr09: Bad parity in LBA for block %d"
1326 " (%02X %02X)\n", i, ptr[6], ptr[7]);
1327 info->pba_to_lba[i] = UNUSABLE;
1328 continue;
1329 }
1330
1331 lba = short_pack(ptr[7], ptr[6]);
1332 lba = (lba & 0x07FF) >> 1;
1333
1334 /*
1335 * Every 1024 physical blocks ("zone"), the LBA numbers
1336 * go back to zero, but are within a higher block of LBA's.
1337 * Also, there is a maximum of 1000 LBA's per zone.
1338 * In other words, in PBA 1024-2047 you will find LBA 0-999
1339 * which are really LBA 1000-1999. This allows for 24 bad
1340 * or special physical blocks per zone.
1341 */
1342
1343 if (lba >= 1000) {
1344 printk(KERN_WARNING
1345 "sddr09: Bad low LBA %d for block %d\n",
1346 lba, i);
1347 goto possibly_erase;
1348 }
1349
1350 lba += 1000*(i/0x400);
1351
1352 if (info->lba_to_pba[lba] != UNDEF) {
1353 printk(KERN_WARNING
1354 "sddr09: LBA %d seen for PBA %d and %d\n",
1355 lba, info->lba_to_pba[lba], i);
1356 goto possibly_erase;
1357 }
1358
1359 info->pba_to_lba[i] = lba;
1360 info->lba_to_pba[lba] = i;
1361 continue;
1362
1363 possibly_erase:
1364 if (erase_bad_lba_entries) {
1365 unsigned long address;
1366
1367 address = (i << (info->pageshift + info->blockshift));
1368 sddr09_erase(us, address>>1);
1369 info->pba_to_lba[i] = UNDEF;
1370 } else
1371 info->pba_to_lba[i] = UNUSABLE;
1372 }
1373
1374 /*
1375 * Approximate capacity. This is not entirely correct yet,
1376 * since a zone with less than 1000 usable pages leads to
1377 * missing LBAs. Especially if it is the last zone, some
1378 * LBAs can be past capacity.
1379 */
1380 lbact = 0;
1381 for (i = 0; i < numblocks; i += 1024) {
1382 int ct = 0;
1383
1384 for (j = 0; j < 1024 && i+j < numblocks; j++) {
1385 if (info->pba_to_lba[i+j] != UNUSABLE) {
1386 if (ct >= 1000)
1387 info->pba_to_lba[i+j] = SPARE;
1388 else
1389 ct++;
1390 }
1391 }
1392 lbact += ct;
1393 }
1394 info->lbact = lbact;
1395 US_DEBUGP("Found %d LBA's\n", lbact);
1396 result = 0;
1397
1398 done:
1399 if (result != 0) {
1400 kfree(info->lba_to_pba);
1401 kfree(info->pba_to_lba);
1402 info->lba_to_pba = NULL;
1403 info->pba_to_lba = NULL;
1404 }
1405 kfree(buffer);
1406 return result;
1407 }
1408
1409 static void
1410 sddr09_card_info_destructor(void *extra) {
1411 struct sddr09_card_info *info = (struct sddr09_card_info *)extra;
1412
1413 if (!info)
1414 return;
1415
1416 kfree(info->lba_to_pba);
1417 kfree(info->pba_to_lba);
1418 }
1419
1420 static int
1421 sddr09_common_init(struct us_data *us) {
1422 int result;
1423
1424 /* set the configuration -- STALL is an acceptable response here */
1425 if (us->pusb_dev->actconfig->desc.bConfigurationValue != 1) {
1426 US_DEBUGP("active config #%d != 1 ??\n", us->pusb_dev
1427 ->actconfig->desc.bConfigurationValue);
1428 return -EINVAL;
1429 }
1430
1431 result = usb_reset_configuration(us->pusb_dev);
1432 US_DEBUGP("Result of usb_reset_configuration is %d\n", result);
1433 if (result == -EPIPE) {
1434 US_DEBUGP("-- stall on control interface\n");
1435 } else if (result != 0) {
1436 /* it's not a stall, but another error -- time to bail */
1437 US_DEBUGP("-- Unknown error. Rejecting device\n");
1438 return -EINVAL;
1439 }
1440
1441 us->extra = kzalloc(sizeof(struct sddr09_card_info), GFP_NOIO);
1442 if (!us->extra)
1443 return -ENOMEM;
1444 us->extra_destructor = sddr09_card_info_destructor;
1445
1446 nand_init_ecc();
1447 return 0;
1448 }
1449
1450
1451 /*
1452 * This is needed at a very early stage. If this is not listed in the
1453 * unusual devices list but called from here then LUN 0 of the combo reader
1454 * is not recognized. But I do not know what precisely these calls do.
1455 */
1456 static int
1457 usb_stor_sddr09_dpcm_init(struct us_data *us) {
1458 int result;
1459 unsigned char *data = us->iobuf;
1460
1461 result = sddr09_common_init(us);
1462 if (result)
1463 return result;
1464
1465 result = sddr09_send_command(us, 0x01, USB_DIR_IN, data, 2);
1466 if (result) {
1467 US_DEBUGP("sddr09_init: send_command fails\n");
1468 return result;
1469 }
1470
1471 US_DEBUGP("SDDR09init: %02X %02X\n", data[0], data[1]);
1472 // get 07 02
1473
1474 result = sddr09_send_command(us, 0x08, USB_DIR_IN, data, 2);
1475 if (result) {
1476 US_DEBUGP("sddr09_init: 2nd send_command fails\n");
1477 return result;
1478 }
1479
1480 US_DEBUGP("SDDR09init: %02X %02X\n", data[0], data[1]);
1481 // get 07 00
1482
1483 result = sddr09_request_sense(us, data, 18);
1484 if (result == 0 && data[2] != 0) {
1485 int j;
1486 for (j=0; j<18; j++)
1487 printk(" %02X", data[j]);
1488 printk("\n");
1489 // get 70 00 00 00 00 00 00 * 00 00 00 00 00 00
1490 // 70: current command
1491 // sense key 0, sense code 0, extd sense code 0
1492 // additional transfer length * = sizeof(data) - 7
1493 // Or: 70 00 06 00 00 00 00 0b 00 00 00 00 28 00 00 00 00 00
1494 // sense key 06, sense code 28: unit attention,
1495 // not ready to ready transition
1496 }
1497
1498 // test unit ready
1499
1500 return 0; /* not result */
1501 }
1502
1503 /*
1504 * Transport for the Microtech DPCM-USB
1505 */
1506 static int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
1507 {
1508 int ret;
1509
1510 US_DEBUGP("dpcm_transport: LUN=%d\n", srb->device->lun);
1511
1512 switch (srb->device->lun) {
1513 case 0:
1514
1515 /*
1516 * LUN 0 corresponds to the CompactFlash card reader.
1517 */
1518 ret = usb_stor_CB_transport(srb, us);
1519 break;
1520
1521 case 1:
1522
1523 /*
1524 * LUN 1 corresponds to the SmartMedia card reader.
1525 */
1526
1527 /*
1528 * Set the LUN to 0 (just in case).
1529 */
1530 srb->device->lun = 0;
1531 ret = sddr09_transport(srb, us);
1532 srb->device->lun = 1;
1533 break;
1534
1535 default:
1536 US_DEBUGP("dpcm_transport: Invalid LUN %d\n",
1537 srb->device->lun);
1538 ret = USB_STOR_TRANSPORT_ERROR;
1539 break;
1540 }
1541 return ret;
1542 }
1543
1544
1545 /*
1546 * Transport for the Sandisk SDDR-09
1547 */
1548 static int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us)
1549 {
1550 static unsigned char sensekey = 0, sensecode = 0;
1551 static unsigned char havefakesense = 0;
1552 int result, i;
1553 unsigned char *ptr = us->iobuf;
1554 unsigned long capacity;
1555 unsigned int page, pages;
1556
1557 struct sddr09_card_info *info;
1558
1559 static unsigned char inquiry_response[8] = {
1560 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
1561 };
1562
1563 /* note: no block descriptor support */
1564 static unsigned char mode_page_01[19] = {
1565 0x00, 0x0F, 0x00, 0x0, 0x0, 0x0, 0x00,
1566 0x01, 0x0A,
1567 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
1568 };
1569
1570 info = (struct sddr09_card_info *)us->extra;
1571
1572 if (srb->cmnd[0] == REQUEST_SENSE && havefakesense) {
1573 /* for a faked command, we have to follow with a faked sense */
1574 memset(ptr, 0, 18);
1575 ptr[0] = 0x70;
1576 ptr[2] = sensekey;
1577 ptr[7] = 11;
1578 ptr[12] = sensecode;
1579 usb_stor_set_xfer_buf(ptr, 18, srb);
1580 sensekey = sensecode = havefakesense = 0;
1581 return USB_STOR_TRANSPORT_GOOD;
1582 }
1583
1584 havefakesense = 1;
1585
1586 /* Dummy up a response for INQUIRY since SDDR09 doesn't
1587 respond to INQUIRY commands */
1588
1589 if (srb->cmnd[0] == INQUIRY) {
1590 memcpy(ptr, inquiry_response, 8);
1591 fill_inquiry_response(us, ptr, 36);
1592 return USB_STOR_TRANSPORT_GOOD;
1593 }
1594
1595 if (srb->cmnd[0] == READ_CAPACITY) {
1596 struct nand_flash_dev *cardinfo;
1597
1598 sddr09_get_wp(us, info); /* read WP bit */
1599
1600 cardinfo = sddr09_get_cardinfo(us, info->flags);
1601 if (!cardinfo) {
1602 /* probably no media */
1603 init_error:
1604 sensekey = 0x02; /* not ready */
1605 sensecode = 0x3a; /* medium not present */
1606 return USB_STOR_TRANSPORT_FAILED;
1607 }
1608
1609 info->capacity = (1 << cardinfo->chipshift);
1610 info->pageshift = cardinfo->pageshift;
1611 info->pagesize = (1 << info->pageshift);
1612 info->blockshift = cardinfo->blockshift;
1613 info->blocksize = (1 << info->blockshift);
1614 info->blockmask = info->blocksize - 1;
1615
1616 // map initialization, must follow get_cardinfo()
1617 if (sddr09_read_map(us)) {
1618 /* probably out of memory */
1619 goto init_error;
1620 }
1621
1622 // Report capacity
1623
1624 capacity = (info->lbact << info->blockshift) - 1;
1625
1626 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
1627
1628 // Report page size
1629
1630 ((__be32 *) ptr)[1] = cpu_to_be32(info->pagesize);
1631 usb_stor_set_xfer_buf(ptr, 8, srb);
1632
1633 return USB_STOR_TRANSPORT_GOOD;
1634 }
1635
1636 if (srb->cmnd[0] == MODE_SENSE_10) {
1637 int modepage = (srb->cmnd[2] & 0x3F);
1638
1639 /* They ask for the Read/Write error recovery page,
1640 or for all pages. */
1641 /* %% We should check DBD %% */
1642 if (modepage == 0x01 || modepage == 0x3F) {
1643 US_DEBUGP("SDDR09: Dummy up request for "
1644 "mode page 0x%x\n", modepage);
1645
1646 memcpy(ptr, mode_page_01, sizeof(mode_page_01));
1647 ((__be16*)ptr)[0] = cpu_to_be16(sizeof(mode_page_01) - 2);
1648 ptr[3] = (info->flags & SDDR09_WP) ? 0x80 : 0;
1649 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
1650 return USB_STOR_TRANSPORT_GOOD;
1651 }
1652
1653 sensekey = 0x05; /* illegal request */
1654 sensecode = 0x24; /* invalid field in CDB */
1655 return USB_STOR_TRANSPORT_FAILED;
1656 }
1657
1658 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)
1659 return USB_STOR_TRANSPORT_GOOD;
1660
1661 havefakesense = 0;
1662
1663 if (srb->cmnd[0] == READ_10) {
1664
1665 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
1666 page <<= 16;
1667 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
1668 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
1669
1670 US_DEBUGP("READ_10: read page %d pagect %d\n",
1671 page, pages);
1672
1673 result = sddr09_read_data(us, page, pages);
1674 return (result == 0 ? USB_STOR_TRANSPORT_GOOD :
1675 USB_STOR_TRANSPORT_ERROR);
1676 }
1677
1678 if (srb->cmnd[0] == WRITE_10) {
1679
1680 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
1681 page <<= 16;
1682 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
1683 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
1684
1685 US_DEBUGP("WRITE_10: write page %d pagect %d\n",
1686 page, pages);
1687
1688 result = sddr09_write_data(us, page, pages);
1689 return (result == 0 ? USB_STOR_TRANSPORT_GOOD :
1690 USB_STOR_TRANSPORT_ERROR);
1691 }
1692
1693 /* catch-all for all other commands, except
1694 * pass TEST_UNIT_READY and REQUEST_SENSE through
1695 */
1696 if (srb->cmnd[0] != TEST_UNIT_READY &&
1697 srb->cmnd[0] != REQUEST_SENSE) {
1698 sensekey = 0x05; /* illegal request */
1699 sensecode = 0x20; /* invalid command */
1700 havefakesense = 1;
1701 return USB_STOR_TRANSPORT_FAILED;
1702 }
1703
1704 for (; srb->cmd_len<12; srb->cmd_len++)
1705 srb->cmnd[srb->cmd_len] = 0;
1706
1707 srb->cmnd[1] = LUNBITS;
1708
1709 ptr[0] = 0;
1710 for (i=0; i<12; i++)
1711 sprintf(ptr+strlen(ptr), "%02X ", srb->cmnd[i]);
1712
1713 US_DEBUGP("SDDR09: Send control for command %s\n", ptr);
1714
1715 result = sddr09_send_scsi_command(us, srb->cmnd, 12);
1716 if (result) {
1717 US_DEBUGP("sddr09_transport: sddr09_send_scsi_command "
1718 "returns %d\n", result);
1719 return USB_STOR_TRANSPORT_ERROR;
1720 }
1721
1722 if (scsi_bufflen(srb) == 0)
1723 return USB_STOR_TRANSPORT_GOOD;
1724
1725 if (srb->sc_data_direction == DMA_TO_DEVICE ||
1726 srb->sc_data_direction == DMA_FROM_DEVICE) {
1727 unsigned int pipe = (srb->sc_data_direction == DMA_TO_DEVICE)
1728 ? us->send_bulk_pipe : us->recv_bulk_pipe;
1729
1730 US_DEBUGP("SDDR09: %s %d bytes\n",
1731 (srb->sc_data_direction == DMA_TO_DEVICE) ?
1732 "sending" : "receiving",
1733 scsi_bufflen(srb));
1734
1735 result = usb_stor_bulk_srb(us, pipe, srb);
1736
1737 return (result == USB_STOR_XFER_GOOD ?
1738 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
1739 }
1740
1741 return USB_STOR_TRANSPORT_GOOD;
1742 }
1743
1744 /*
1745 * Initialization routine for the sddr09 subdriver
1746 */
1747 static int
1748 usb_stor_sddr09_init(struct us_data *us) {
1749 return sddr09_common_init(us);
1750 }
1751
1752 static int sddr09_probe(struct usb_interface *intf,
1753 const struct usb_device_id *id)
1754 {
1755 struct us_data *us;
1756 int result;
1757
1758 result = usb_stor_probe1(&us, intf, id,
1759 (id - sddr09_usb_ids) + sddr09_unusual_dev_list);
1760 if (result)
1761 return result;
1762
1763 if (us->protocol == US_PR_DPCM_USB) {
1764 us->transport_name = "Control/Bulk-EUSB/SDDR09";
1765 us->transport = dpcm_transport;
1766 us->transport_reset = usb_stor_CB_reset;
1767 us->max_lun = 1;
1768 } else {
1769 us->transport_name = "EUSB/SDDR09";
1770 us->transport = sddr09_transport;
1771 us->transport_reset = usb_stor_CB_reset;
1772 us->max_lun = 0;
1773 }
1774
1775 result = usb_stor_probe2(us);
1776 return result;
1777 }
1778
1779 static struct usb_driver sddr09_driver = {
1780 .name = "ums-sddr09",
1781 .probe = sddr09_probe,
1782 .disconnect = usb_stor_disconnect,
1783 .suspend = usb_stor_suspend,
1784 .resume = usb_stor_resume,
1785 .reset_resume = usb_stor_reset_resume,
1786 .pre_reset = usb_stor_pre_reset,
1787 .post_reset = usb_stor_post_reset,
1788 .id_table = sddr09_usb_ids,
1789 .soft_unbind = 1,
1790 };
1791
1792 static int __init sddr09_init(void)
1793 {
1794 return usb_register(&sddr09_driver);
1795 }
1796
1797 static void __exit sddr09_exit(void)
1798 {
1799 usb_deregister(&sddr09_driver);
1800 }
1801
1802 module_init(sddr09_init);
1803 module_exit(sddr09_exit);
1804
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