xref: /openbmc/linux/drivers/usb/storage/sddr55.c (revision df561f66)
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
sddr55_bulk_transport(struct us_data * us,int direction,unsigned char * data,unsigned int len)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, data, 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 
sddr55_status(struct us_data * us)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 		DMA_TO_DEVICE, command, 8);
140 
141 	usb_stor_dbg(us, "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 		DMA_FROM_DEVICE, status,	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(info->lba_to_pba);
155 		kfree(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 		DMA_FROM_DEVICE, status,	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 
sddr55_read_data(struct us_data * us,unsigned int lba,unsigned int page,unsigned short sectors)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 long 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(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, "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 				DMA_TO_DEVICE, command, 8);
254 
255 			usb_stor_dbg(us, "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 				DMA_FROM_DEVICE, 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 				DMA_FROM_DEVICE, status, 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, len, us->srb,
291 				&sg, &offset, 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(buffer);
302 
303 	return result;
304 }
305 
sddr55_write_data(struct us_data * us,unsigned int lba,unsigned int page,unsigned short sectors)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 long 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(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, len, us->srb,
360 				&sg, &offset, FROM_XFER_BUF);
361 
362 		usb_stor_dbg(us, "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, "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, "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, "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 			DMA_TO_DEVICE, command, 8);
431 
432 		if (result != USB_STOR_XFER_GOOD) {
433 			usb_stor_dbg(us, "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 			DMA_TO_DEVICE, buffer, len);
445 
446 		if (result != USB_STOR_XFER_GOOD) {
447 			usb_stor_dbg(us, "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, DMA_FROM_DEVICE, status, 6);
458 
459 		if (result != USB_STOR_XFER_GOOD) {
460 			usb_stor_dbg(us, "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, "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(buffer);
509 	return result;
510 }
511 
sddr55_read_deviceID(struct us_data * us,unsigned char * manufacturerID,unsigned char * deviceID)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, DMA_TO_DEVICE, command, 8);
524 
525 	usb_stor_dbg(us, "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 		DMA_FROM_DEVICE, content, 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 			DMA_FROM_DEVICE, content, 2);
543 	}
544 
545 	return USB_STOR_TRANSPORT_GOOD;
546 }
547 
548 
sddr55_reset(struct us_data * us)549 static int sddr55_reset(struct us_data *us)
550 {
551 	return 0;
552 }
553 
554 
sddr55_get_capacity(struct us_data * us)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, "Reading capacity...\n");
563 
564 	result = sddr55_read_deviceID(us,
565 		&manufacturerID,
566 		&deviceID);
567 
568 	usb_stor_dbg(us, "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, "Device ID = %02X\n", deviceID);
574 	usb_stor_dbg(us, "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 
sddr55_read_map(struct us_data * us)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(numblocks, 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, DMA_TO_DEVICE, command, 8);
666 
667 	if ( result != USB_STOR_XFER_GOOD) {
668 		kfree (buffer);
669 		return -1;
670 	}
671 
672 	result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
673 
674 	if ( result != USB_STOR_XFER_GOOD) {
675 		kfree (buffer);
676 		return -1;
677 	}
678 
679 	result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
680 
681 	if ( result != USB_STOR_XFER_GOOD) {
682 		kfree (buffer);
683 		return -1;
684 	}
685 
686 	kfree(info->lba_to_pba);
687 	kfree(info->pba_to_lba);
688 	info->lba_to_pba = kmalloc_array(numblocks, sizeof(int), GFP_NOIO);
689 	info->pba_to_lba = kmalloc_array(numblocks, sizeof(int), GFP_NOIO);
690 
691 	if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
692 		kfree(info->lba_to_pba);
693 		kfree(info->pba_to_lba);
694 		info->lba_to_pba = NULL;
695 		info->pba_to_lba = NULL;
696 		kfree(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, "LBA %04X <-> PBA %04X\n", lba, i);
752 
753 		info->lba_to_pba[lba + zone * 1000] = i;
754 	}
755 
756 	kfree(buffer);
757 	return 0;
758 }
759 
760 
sddr55_card_info_destructor(void * extra)761 static void sddr55_card_info_destructor(void *extra) {
762 	struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
763 
764 	if (!extra)
765 		return;
766 
767 	kfree(info->lba_to_pba);
768 	kfree(info->pba_to_lba);
769 }
770 
771 
772 /*
773  * Transport for the Sandisk SDDR-55
774  */
sddr55_transport(struct scsi_cmnd * srb,struct us_data * us)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 			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, "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 (ptr, 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, ptr, 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(ptr, 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(ptr, sizeof(mode_page_01), srb);
900 
901 		if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
902 			usb_stor_dbg(us, "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, "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, "%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, "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, "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, pages);
956 		} else {
957 			usb_stor_dbg(us, "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, 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 
sddr55_probe(struct usb_interface * intf,const struct usb_device_id * id)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(&us, intf, id,
987 			(id - sddr55_usb_ids) + sddr55_unusual_dev_list,
988 			&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