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1/* Driver for Freecom USB/IDE adaptor
2 *
3 * Freecom v0.1:
4 *
5 * First release
6 *
7 * Current development and maintenance by:
8 * (C) 2000 David Brown <usb-storage@davidb.org>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2, or (at your option) any
13 * later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 * This driver was developed with information provided in FREECOM's USB
25 * Programmers Reference Guide. For further information contact Freecom
26 * (http://www.freecom.de/)
27 */
28
29#include <linux/module.h>
30#include <scsi/scsi.h>
31#include <scsi/scsi_cmnd.h>
32
33#include "usb.h"
34#include "transport.h"
35#include "protocol.h"
36#include "debug.h"
37
38MODULE_DESCRIPTION("Driver for Freecom USB/IDE adaptor");
39MODULE_AUTHOR("David Brown <usb-storage@davidb.org>");
40MODULE_LICENSE("GPL");
41
42#ifdef CONFIG_USB_STORAGE_DEBUG
43static void pdump (void *, int);
44#endif
45
46/* Bits of HD_STATUS */
47#define ERR_STAT 0x01
48#define DRQ_STAT 0x08
49
50/* All of the outgoing packets are 64 bytes long. */
51struct freecom_cb_wrap {
52 u8 Type; /* Command type. */
53 u8 Timeout; /* Timeout in seconds. */
54 u8 Atapi[12]; /* An ATAPI packet. */
55 u8 Filler[50]; /* Padding Data. */
56};
57
58struct freecom_xfer_wrap {
59 u8 Type; /* Command type. */
60 u8 Timeout; /* Timeout in seconds. */
61 __le32 Count; /* Number of bytes to transfer. */
62 u8 Pad[58];
63} __attribute__ ((packed));
64
65struct freecom_ide_out {
66 u8 Type; /* Type + IDE register. */
67 u8 Pad;
68 __le16 Value; /* Value to write. */
69 u8 Pad2[60];
70};
71
72struct freecom_ide_in {
73 u8 Type; /* Type | IDE register. */
74 u8 Pad[63];
75};
76
77struct freecom_status {
78 u8 Status;
79 u8 Reason;
80 __le16 Count;
81 u8 Pad[60];
82};
83
84/* Freecom stuffs the interrupt status in the INDEX_STAT bit of the ide
85 * register. */
86#define FCM_INT_STATUS 0x02 /* INDEX_STAT */
87#define FCM_STATUS_BUSY 0x80
88
89/* These are the packet types. The low bit indicates that this command
90 * should wait for an interrupt. */
91#define FCM_PACKET_ATAPI 0x21
92#define FCM_PACKET_STATUS 0x20
93
94/* Receive data from the IDE interface. The ATAPI packet has already
95 * waited, so the data should be immediately available. */
96#define FCM_PACKET_INPUT 0x81
97
98/* Send data to the IDE interface. */
99#define FCM_PACKET_OUTPUT 0x01
100
101/* Write a value to an ide register. Or the ide register to write after
102 * munging the address a bit. */
103#define FCM_PACKET_IDE_WRITE 0x40
104#define FCM_PACKET_IDE_READ 0xC0
105
106/* All packets (except for status) are 64 bytes long. */
107#define FCM_PACKET_LENGTH 64
108#define FCM_STATUS_PACKET_LENGTH 4
109
110static int init_freecom(struct us_data *us);
111
112
113/*
114 * The table of devices
115 */
116#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
117 vendorName, productName, useProtocol, useTransport, \
118 initFunction, flags) \
119{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
120 .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
121
122struct usb_device_id freecom_usb_ids[] = {
123# include "unusual_freecom.h"
124 { } /* Terminating entry */
125};
126MODULE_DEVICE_TABLE(usb, freecom_usb_ids);
127
128#undef UNUSUAL_DEV
129
130/*
131 * The flags table
132 */
133#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
134 vendor_name, product_name, use_protocol, use_transport, \
135 init_function, Flags) \
136{ \
137 .vendorName = vendor_name, \
138 .productName = product_name, \
139 .useProtocol = use_protocol, \
140 .useTransport = use_transport, \
141 .initFunction = init_function, \
142}
143
144static struct us_unusual_dev freecom_unusual_dev_list[] = {
145# include "unusual_freecom.h"
146 { } /* Terminating entry */
147};
148
149#undef UNUSUAL_DEV
150
151static int
152freecom_readdata (struct scsi_cmnd *srb, struct us_data *us,
153 unsigned int ipipe, unsigned int opipe, int count)
154{
155 struct freecom_xfer_wrap *fxfr =
156 (struct freecom_xfer_wrap *) us->iobuf;
157 int result;
158
159 fxfr->Type = FCM_PACKET_INPUT | 0x00;
160 fxfr->Timeout = 0; /* Short timeout for debugging. */
161 fxfr->Count = cpu_to_le32 (count);
162 memset (fxfr->Pad, 0, sizeof (fxfr->Pad));
163
164 US_DEBUGP("Read data Freecom! (c=%d)\n", count);
165
166 /* Issue the transfer command. */
167 result = usb_stor_bulk_transfer_buf (us, opipe, fxfr,
168 FCM_PACKET_LENGTH, NULL);
169 if (result != USB_STOR_XFER_GOOD) {
170 US_DEBUGP ("Freecom readdata transport error\n");
171 return USB_STOR_TRANSPORT_ERROR;
172 }
173
174 /* Now transfer all of our blocks. */
175 US_DEBUGP("Start of read\n");
176 result = usb_stor_bulk_srb(us, ipipe, srb);
177 US_DEBUGP("freecom_readdata done!\n");
178
179 if (result > USB_STOR_XFER_SHORT)
180 return USB_STOR_TRANSPORT_ERROR;
181 return USB_STOR_TRANSPORT_GOOD;
182}
183
184static int
185freecom_writedata (struct scsi_cmnd *srb, struct us_data *us,
186 int unsigned ipipe, unsigned int opipe, int count)
187{
188 struct freecom_xfer_wrap *fxfr =
189 (struct freecom_xfer_wrap *) us->iobuf;
190 int result;
191
192 fxfr->Type = FCM_PACKET_OUTPUT | 0x00;
193 fxfr->Timeout = 0; /* Short timeout for debugging. */
194 fxfr->Count = cpu_to_le32 (count);
195 memset (fxfr->Pad, 0, sizeof (fxfr->Pad));
196
197 US_DEBUGP("Write data Freecom! (c=%d)\n", count);
198
199 /* Issue the transfer command. */
200 result = usb_stor_bulk_transfer_buf (us, opipe, fxfr,
201 FCM_PACKET_LENGTH, NULL);
202 if (result != USB_STOR_XFER_GOOD) {
203 US_DEBUGP ("Freecom writedata transport error\n");
204 return USB_STOR_TRANSPORT_ERROR;
205 }
206
207 /* Now transfer all of our blocks. */
208 US_DEBUGP("Start of write\n");
209 result = usb_stor_bulk_srb(us, opipe, srb);
210
211 US_DEBUGP("freecom_writedata done!\n");
212 if (result > USB_STOR_XFER_SHORT)
213 return USB_STOR_TRANSPORT_ERROR;
214 return USB_STOR_TRANSPORT_GOOD;
215}
216
217/*
218 * Transport for the Freecom USB/IDE adaptor.
219 *
220 */
221static int freecom_transport(struct scsi_cmnd *srb, struct us_data *us)
222{
223 struct freecom_cb_wrap *fcb;
224 struct freecom_status *fst;
225 unsigned int ipipe, opipe; /* We need both pipes. */
226 int result;
227 unsigned int partial;
228 int length;
229
230 fcb = (struct freecom_cb_wrap *) us->iobuf;
231 fst = (struct freecom_status *) us->iobuf;
232
233 US_DEBUGP("Freecom TRANSPORT STARTED\n");
234
235 /* Get handles for both transports. */
236 opipe = us->send_bulk_pipe;
237 ipipe = us->recv_bulk_pipe;
238
239 /* The ATAPI Command always goes out first. */
240 fcb->Type = FCM_PACKET_ATAPI | 0x00;
241 fcb->Timeout = 0;
242 memcpy (fcb->Atapi, srb->cmnd, 12);
243 memset (fcb->Filler, 0, sizeof (fcb->Filler));
244
245 US_DEBUG(pdump (srb->cmnd, 12));
246
247 /* Send it out. */
248 result = usb_stor_bulk_transfer_buf (us, opipe, fcb,
249 FCM_PACKET_LENGTH, NULL);
250
251 /* The Freecom device will only fail if there is something wrong in
252 * USB land. It returns the status in its own registers, which
253 * come back in the bulk pipe. */
254 if (result != USB_STOR_XFER_GOOD) {
255 US_DEBUGP ("freecom transport error\n");
256 return USB_STOR_TRANSPORT_ERROR;
257 }
258
259 /* There are times we can optimize out this status read, but it
260 * doesn't hurt us to always do it now. */
261 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
262 FCM_STATUS_PACKET_LENGTH, &partial);
263 US_DEBUGP("foo Status result %d %u\n", result, partial);
264 if (result != USB_STOR_XFER_GOOD)
265 return USB_STOR_TRANSPORT_ERROR;
266
267 US_DEBUG(pdump ((void *) fst, partial));
268
269 /* The firmware will time-out commands after 20 seconds. Some commands
270 * can legitimately take longer than this, so we use a different
271 * command that only waits for the interrupt and then sends status,
272 * without having to send a new ATAPI command to the device.
273 *
274 * NOTE: There is some indication that a data transfer after a timeout
275 * may not work, but that is a condition that should never happen.
276 */
277 while (fst->Status & FCM_STATUS_BUSY) {
278 US_DEBUGP("20 second USB/ATAPI bridge TIMEOUT occurred!\n");
279 US_DEBUGP("fst->Status is %x\n", fst->Status);
280
281 /* Get the status again */
282 fcb->Type = FCM_PACKET_STATUS;
283 fcb->Timeout = 0;
284 memset (fcb->Atapi, 0, sizeof(fcb->Atapi));
285 memset (fcb->Filler, 0, sizeof (fcb->Filler));
286
287 /* Send it out. */
288 result = usb_stor_bulk_transfer_buf (us, opipe, fcb,
289 FCM_PACKET_LENGTH, NULL);
290
291 /* The Freecom device will only fail if there is something
292 * wrong in USB land. It returns the status in its own
293 * registers, which come back in the bulk pipe.
294 */
295 if (result != USB_STOR_XFER_GOOD) {
296 US_DEBUGP ("freecom transport error\n");
297 return USB_STOR_TRANSPORT_ERROR;
298 }
299
300 /* get the data */
301 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
302 FCM_STATUS_PACKET_LENGTH, &partial);
303
304 US_DEBUGP("bar Status result %d %u\n", result, partial);
305 if (result != USB_STOR_XFER_GOOD)
306 return USB_STOR_TRANSPORT_ERROR;
307
308 US_DEBUG(pdump ((void *) fst, partial));
309 }
310
311 if (partial != 4)
312 return USB_STOR_TRANSPORT_ERROR;
313 if ((fst->Status & 1) != 0) {
314 US_DEBUGP("operation failed\n");
315 return USB_STOR_TRANSPORT_FAILED;
316 }
317
318 /* The device might not have as much data available as we
319 * requested. If you ask for more than the device has, this reads
320 * and such will hang. */
321 US_DEBUGP("Device indicates that it has %d bytes available\n",
322 le16_to_cpu (fst->Count));
323 US_DEBUGP("SCSI requested %d\n", scsi_bufflen(srb));
324
325 /* Find the length we desire to read. */
326 switch (srb->cmnd[0]) {
327 case INQUIRY:
328 case REQUEST_SENSE: /* 16 or 18 bytes? spec says 18, lots of devices only have 16 */
329 case MODE_SENSE:
330 case MODE_SENSE_10:
331 length = le16_to_cpu(fst->Count);
332 break;
333 default:
334 length = scsi_bufflen(srb);
335 }
336
337 /* verify that this amount is legal */
338 if (length > scsi_bufflen(srb)) {
339 length = scsi_bufflen(srb);
340 US_DEBUGP("Truncating request to match buffer length: %d\n", length);
341 }
342
343 /* What we do now depends on what direction the data is supposed to
344 * move in. */
345
346 switch (us->srb->sc_data_direction) {
347 case DMA_FROM_DEVICE:
348 /* catch bogus "read 0 length" case */
349 if (!length)
350 break;
351 /* Make sure that the status indicates that the device
352 * wants data as well. */
353 if ((fst->Status & DRQ_STAT) == 0 || (fst->Reason & 3) != 2) {
354 US_DEBUGP("SCSI wants data, drive doesn't have any\n");
355 return USB_STOR_TRANSPORT_FAILED;
356 }
357 result = freecom_readdata (srb, us, ipipe, opipe, length);
358 if (result != USB_STOR_TRANSPORT_GOOD)
359 return result;
360
361 US_DEBUGP("FCM: Waiting for status\n");
362 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
363 FCM_PACKET_LENGTH, &partial);
364 US_DEBUG(pdump ((void *) fst, partial));
365
366 if (partial != 4 || result > USB_STOR_XFER_SHORT)
367 return USB_STOR_TRANSPORT_ERROR;
368 if ((fst->Status & ERR_STAT) != 0) {
369 US_DEBUGP("operation failed\n");
370 return USB_STOR_TRANSPORT_FAILED;
371 }
372 if ((fst->Reason & 3) != 3) {
373 US_DEBUGP("Drive seems still hungry\n");
374 return USB_STOR_TRANSPORT_FAILED;
375 }
376 US_DEBUGP("Transfer happy\n");
377 break;
378
379 case DMA_TO_DEVICE:
380 /* catch bogus "write 0 length" case */
381 if (!length)
382 break;
383 /* Make sure the status indicates that the device wants to
384 * send us data. */
385 /* !!IMPLEMENT!! */
386 result = freecom_writedata (srb, us, ipipe, opipe, length);
387 if (result != USB_STOR_TRANSPORT_GOOD)
388 return result;
389
390 US_DEBUGP("FCM: Waiting for status\n");
391 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
392 FCM_PACKET_LENGTH, &partial);
393
394 if (partial != 4 || result > USB_STOR_XFER_SHORT)
395 return USB_STOR_TRANSPORT_ERROR;
396 if ((fst->Status & ERR_STAT) != 0) {
397 US_DEBUGP("operation failed\n");
398 return USB_STOR_TRANSPORT_FAILED;
399 }
400 if ((fst->Reason & 3) != 3) {
401 US_DEBUGP("Drive seems still hungry\n");
402 return USB_STOR_TRANSPORT_FAILED;
403 }
404
405 US_DEBUGP("Transfer happy\n");
406 break;
407
408
409 case DMA_NONE:
410 /* Easy, do nothing. */
411 break;
412
413 default:
414 /* should never hit here -- filtered in usb.c */
415 US_DEBUGP ("freecom unimplemented direction: %d\n",
416 us->srb->sc_data_direction);
417 /* Return fail, SCSI seems to handle this better. */
418 return USB_STOR_TRANSPORT_FAILED;
419 break;
420 }
421
422 return USB_STOR_TRANSPORT_GOOD;
423}
424
425static int init_freecom(struct us_data *us)
426{
427 int result;
428 char *buffer = us->iobuf;
429
430 /* The DMA-mapped I/O buffer is 64 bytes long, just right for
431 * all our packets. No need to allocate any extra buffer space.
432 */
433
434 result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
435 0x4c, 0xc0, 0x4346, 0x0, buffer, 0x20, 3*HZ);
436 buffer[32] = '\0';
437 US_DEBUGP("String returned from FC init is: %s\n", buffer);
438
439 /* Special thanks to the people at Freecom for providing me with
440 * this "magic sequence", which they use in their Windows and MacOS
441 * drivers to make sure that all the attached perhiperals are
442 * properly reset.
443 */
444
445 /* send reset */
446 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
447 0x4d, 0x40, 0x24d8, 0x0, NULL, 0x0, 3*HZ);
448 US_DEBUGP("result from activate reset is %d\n", result);
449
450 /* wait 250ms */
451 mdelay(250);
452
453 /* clear reset */
454 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
455 0x4d, 0x40, 0x24f8, 0x0, NULL, 0x0, 3*HZ);
456 US_DEBUGP("result from clear reset is %d\n", result);
457
458 /* wait 3 seconds */
459 mdelay(3 * 1000);
460
461 return USB_STOR_TRANSPORT_GOOD;
462}
463
464static int usb_stor_freecom_reset(struct us_data *us)
465{
466 printk (KERN_CRIT "freecom reset called\n");
467
468 /* We don't really have this feature. */
469 return FAILED;
470}
471
472#ifdef CONFIG_USB_STORAGE_DEBUG
473static void pdump (void *ibuffer, int length)
474{
475 static char line[80];
476 int offset = 0;
477 unsigned char *buffer = (unsigned char *) ibuffer;
478 int i, j;
479 int from, base;
480
481 offset = 0;
482 for (i = 0; i < length; i++) {
483 if ((i & 15) == 0) {
484 if (i > 0) {
485 offset += sprintf (line+offset, " - ");
486 for (j = i - 16; j < i; j++) {
487 if (buffer[j] >= 32 && buffer[j] <= 126)
488 line[offset++] = buffer[j];
489 else
490 line[offset++] = '.';
491 }
492 line[offset] = 0;
493 US_DEBUGP("%s\n", line);
494 offset = 0;
495 }
496 offset += sprintf (line+offset, "%08x:", i);
497 } else if ((i & 7) == 0) {
498 offset += sprintf (line+offset, " -");
499 }
500 offset += sprintf (line+offset, " %02x", buffer[i] & 0xff);
501 }
502
503 /* Add the last "chunk" of data. */
504 from = (length - 1) % 16;
505 base = ((length - 1) / 16) * 16;
506
507 for (i = from + 1; i < 16; i++)
508 offset += sprintf (line+offset, " ");
509 if (from < 8)
510 offset += sprintf (line+offset, " ");
511 offset += sprintf (line+offset, " - ");
512
513 for (i = 0; i <= from; i++) {
514 if (buffer[base+i] >= 32 && buffer[base+i] <= 126)
515 line[offset++] = buffer[base+i];
516 else
517 line[offset++] = '.';
518 }
519 line[offset] = 0;
520 US_DEBUGP("%s\n", line);
521 offset = 0;
522}
523#endif
524
525static int freecom_probe(struct usb_interface *intf,
526 const struct usb_device_id *id)
527{
528 struct us_data *us;
529 int result;
530
531 result = usb_stor_probe1(&us, intf, id,
532 (id - freecom_usb_ids) + freecom_unusual_dev_list);
533 if (result)
534 return result;
535
536 us->transport_name = "Freecom";
537 us->transport = freecom_transport;
538 us->transport_reset = usb_stor_freecom_reset;
539 us->max_lun = 0;
540
541 result = usb_stor_probe2(us);
542 return result;
543}
544
545static struct usb_driver freecom_driver = {
546 .name = "ums-freecom",
547 .probe = freecom_probe,
548 .disconnect = usb_stor_disconnect,
549 .suspend = usb_stor_suspend,
550 .resume = usb_stor_resume,
551 .reset_resume = usb_stor_reset_resume,
552 .pre_reset = usb_stor_pre_reset,
553 .post_reset = usb_stor_post_reset,
554 .id_table = freecom_usb_ids,
555 .soft_unbind = 1,
556};
557
558static int __init freecom_init(void)
559{
560 return usb_register(&freecom_driver);
561}
562
563static void __exit freecom_exit(void)
564{
565 usb_deregister(&freecom_driver);
566}
567
568module_init(freecom_init);
569module_exit(freecom_exit);
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Driver for Freecom USB/IDE adaptor
4 *
5 * Freecom v0.1:
6 *
7 * First release
8 *
9 * Current development and maintenance by:
10 * (C) 2000 David Brown <usb-storage@davidb.org>
11 *
12 * This driver was developed with information provided in FREECOM's USB
13 * Programmers Reference Guide. For further information contact Freecom
14 * (https://www.freecom.de/)
15 */
16
17#include <linux/module.h>
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-freecom"
28
29MODULE_DESCRIPTION("Driver for Freecom USB/IDE adaptor");
30MODULE_AUTHOR("David Brown <usb-storage@davidb.org>");
31MODULE_LICENSE("GPL");
32MODULE_IMPORT_NS(USB_STORAGE);
33
34#ifdef CONFIG_USB_STORAGE_DEBUG
35static void pdump(struct us_data *us, void *ibuffer, int length);
36#endif
37
38/* Bits of HD_STATUS */
39#define ERR_STAT 0x01
40#define DRQ_STAT 0x08
41
42/* All of the outgoing packets are 64 bytes long. */
43struct freecom_cb_wrap {
44 u8 Type; /* Command type. */
45 u8 Timeout; /* Timeout in seconds. */
46 u8 Atapi[12]; /* An ATAPI packet. */
47 u8 Filler[50]; /* Padding Data. */
48};
49
50struct freecom_xfer_wrap {
51 u8 Type; /* Command type. */
52 u8 Timeout; /* Timeout in seconds. */
53 __le32 Count; /* Number of bytes to transfer. */
54 u8 Pad[58];
55} __attribute__ ((packed));
56
57struct freecom_ide_out {
58 u8 Type; /* Type + IDE register. */
59 u8 Pad;
60 __le16 Value; /* Value to write. */
61 u8 Pad2[60];
62};
63
64struct freecom_ide_in {
65 u8 Type; /* Type | IDE register. */
66 u8 Pad[63];
67};
68
69struct freecom_status {
70 u8 Status;
71 u8 Reason;
72 __le16 Count;
73 u8 Pad[60];
74};
75
76/*
77 * Freecom stuffs the interrupt status in the INDEX_STAT bit of the ide
78 * register.
79 */
80#define FCM_INT_STATUS 0x02 /* INDEX_STAT */
81#define FCM_STATUS_BUSY 0x80
82
83/*
84 * These are the packet types. The low bit indicates that this command
85 * should wait for an interrupt.
86 */
87#define FCM_PACKET_ATAPI 0x21
88#define FCM_PACKET_STATUS 0x20
89
90/*
91 * Receive data from the IDE interface. The ATAPI packet has already
92 * waited, so the data should be immediately available.
93 */
94#define FCM_PACKET_INPUT 0x81
95
96/* Send data to the IDE interface. */
97#define FCM_PACKET_OUTPUT 0x01
98
99/*
100 * Write a value to an ide register. Or the ide register to write after
101 * munging the address a bit.
102 */
103#define FCM_PACKET_IDE_WRITE 0x40
104#define FCM_PACKET_IDE_READ 0xC0
105
106/* All packets (except for status) are 64 bytes long. */
107#define FCM_PACKET_LENGTH 64
108#define FCM_STATUS_PACKET_LENGTH 4
109
110static int init_freecom(struct us_data *us);
111
112
113/*
114 * The table of devices
115 */
116#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
117 vendorName, productName, useProtocol, useTransport, \
118 initFunction, flags) \
119{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
120 .driver_info = (flags) }
121
122static struct usb_device_id freecom_usb_ids[] = {
123# include "unusual_freecom.h"
124 { } /* Terminating entry */
125};
126MODULE_DEVICE_TABLE(usb, freecom_usb_ids);
127
128#undef UNUSUAL_DEV
129
130/*
131 * The flags table
132 */
133#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
134 vendor_name, product_name, use_protocol, use_transport, \
135 init_function, Flags) \
136{ \
137 .vendorName = vendor_name, \
138 .productName = product_name, \
139 .useProtocol = use_protocol, \
140 .useTransport = use_transport, \
141 .initFunction = init_function, \
142}
143
144static struct us_unusual_dev freecom_unusual_dev_list[] = {
145# include "unusual_freecom.h"
146 { } /* Terminating entry */
147};
148
149#undef UNUSUAL_DEV
150
151static int
152freecom_readdata (struct scsi_cmnd *srb, struct us_data *us,
153 unsigned int ipipe, unsigned int opipe, int count)
154{
155 struct freecom_xfer_wrap *fxfr =
156 (struct freecom_xfer_wrap *) us->iobuf;
157 int result;
158
159 fxfr->Type = FCM_PACKET_INPUT | 0x00;
160 fxfr->Timeout = 0; /* Short timeout for debugging. */
161 fxfr->Count = cpu_to_le32 (count);
162 memset (fxfr->Pad, 0, sizeof (fxfr->Pad));
163
164 usb_stor_dbg(us, "Read data Freecom! (c=%d)\n", count);
165
166 /* Issue the transfer command. */
167 result = usb_stor_bulk_transfer_buf (us, opipe, fxfr,
168 FCM_PACKET_LENGTH, NULL);
169 if (result != USB_STOR_XFER_GOOD) {
170 usb_stor_dbg(us, "Freecom readdata transport error\n");
171 return USB_STOR_TRANSPORT_ERROR;
172 }
173
174 /* Now transfer all of our blocks. */
175 usb_stor_dbg(us, "Start of read\n");
176 result = usb_stor_bulk_srb(us, ipipe, srb);
177 usb_stor_dbg(us, "freecom_readdata done!\n");
178
179 if (result > USB_STOR_XFER_SHORT)
180 return USB_STOR_TRANSPORT_ERROR;
181 return USB_STOR_TRANSPORT_GOOD;
182}
183
184static int
185freecom_writedata (struct scsi_cmnd *srb, struct us_data *us,
186 int unsigned ipipe, unsigned int opipe, int count)
187{
188 struct freecom_xfer_wrap *fxfr =
189 (struct freecom_xfer_wrap *) us->iobuf;
190 int result;
191
192 fxfr->Type = FCM_PACKET_OUTPUT | 0x00;
193 fxfr->Timeout = 0; /* Short timeout for debugging. */
194 fxfr->Count = cpu_to_le32 (count);
195 memset (fxfr->Pad, 0, sizeof (fxfr->Pad));
196
197 usb_stor_dbg(us, "Write data Freecom! (c=%d)\n", count);
198
199 /* Issue the transfer command. */
200 result = usb_stor_bulk_transfer_buf (us, opipe, fxfr,
201 FCM_PACKET_LENGTH, NULL);
202 if (result != USB_STOR_XFER_GOOD) {
203 usb_stor_dbg(us, "Freecom writedata transport error\n");
204 return USB_STOR_TRANSPORT_ERROR;
205 }
206
207 /* Now transfer all of our blocks. */
208 usb_stor_dbg(us, "Start of write\n");
209 result = usb_stor_bulk_srb(us, opipe, srb);
210
211 usb_stor_dbg(us, "freecom_writedata done!\n");
212 if (result > USB_STOR_XFER_SHORT)
213 return USB_STOR_TRANSPORT_ERROR;
214 return USB_STOR_TRANSPORT_GOOD;
215}
216
217/*
218 * Transport for the Freecom USB/IDE adaptor.
219 *
220 */
221static int freecom_transport(struct scsi_cmnd *srb, struct us_data *us)
222{
223 struct freecom_cb_wrap *fcb;
224 struct freecom_status *fst;
225 unsigned int ipipe, opipe; /* We need both pipes. */
226 int result;
227 unsigned int partial;
228 int length;
229
230 fcb = (struct freecom_cb_wrap *) us->iobuf;
231 fst = (struct freecom_status *) us->iobuf;
232
233 usb_stor_dbg(us, "Freecom TRANSPORT STARTED\n");
234
235 /* Get handles for both transports. */
236 opipe = us->send_bulk_pipe;
237 ipipe = us->recv_bulk_pipe;
238
239 /* The ATAPI Command always goes out first. */
240 fcb->Type = FCM_PACKET_ATAPI | 0x00;
241 fcb->Timeout = 0;
242 memcpy (fcb->Atapi, srb->cmnd, 12);
243 memset (fcb->Filler, 0, sizeof (fcb->Filler));
244
245 US_DEBUG(pdump(us, srb->cmnd, 12));
246
247 /* Send it out. */
248 result = usb_stor_bulk_transfer_buf (us, opipe, fcb,
249 FCM_PACKET_LENGTH, NULL);
250
251 /*
252 * The Freecom device will only fail if there is something wrong in
253 * USB land. It returns the status in its own registers, which
254 * come back in the bulk pipe.
255 */
256 if (result != USB_STOR_XFER_GOOD) {
257 usb_stor_dbg(us, "freecom transport error\n");
258 return USB_STOR_TRANSPORT_ERROR;
259 }
260
261 /*
262 * There are times we can optimize out this status read, but it
263 * doesn't hurt us to always do it now.
264 */
265 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
266 FCM_STATUS_PACKET_LENGTH, &partial);
267 usb_stor_dbg(us, "foo Status result %d %u\n", result, partial);
268 if (result != USB_STOR_XFER_GOOD)
269 return USB_STOR_TRANSPORT_ERROR;
270
271 US_DEBUG(pdump(us, (void *)fst, partial));
272
273 /*
274 * The firmware will time-out commands after 20 seconds. Some commands
275 * can legitimately take longer than this, so we use a different
276 * command that only waits for the interrupt and then sends status,
277 * without having to send a new ATAPI command to the device.
278 *
279 * NOTE: There is some indication that a data transfer after a timeout
280 * may not work, but that is a condition that should never happen.
281 */
282 while (fst->Status & FCM_STATUS_BUSY) {
283 usb_stor_dbg(us, "20 second USB/ATAPI bridge TIMEOUT occurred!\n");
284 usb_stor_dbg(us, "fst->Status is %x\n", fst->Status);
285
286 /* Get the status again */
287 fcb->Type = FCM_PACKET_STATUS;
288 fcb->Timeout = 0;
289 memset (fcb->Atapi, 0, sizeof(fcb->Atapi));
290 memset (fcb->Filler, 0, sizeof (fcb->Filler));
291
292 /* Send it out. */
293 result = usb_stor_bulk_transfer_buf (us, opipe, fcb,
294 FCM_PACKET_LENGTH, NULL);
295
296 /*
297 * The Freecom device will only fail if there is something
298 * wrong in USB land. It returns the status in its own
299 * registers, which come back in the bulk pipe.
300 */
301 if (result != USB_STOR_XFER_GOOD) {
302 usb_stor_dbg(us, "freecom transport error\n");
303 return USB_STOR_TRANSPORT_ERROR;
304 }
305
306 /* get the data */
307 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
308 FCM_STATUS_PACKET_LENGTH, &partial);
309
310 usb_stor_dbg(us, "bar Status result %d %u\n", result, partial);
311 if (result != USB_STOR_XFER_GOOD)
312 return USB_STOR_TRANSPORT_ERROR;
313
314 US_DEBUG(pdump(us, (void *)fst, partial));
315 }
316
317 if (partial != 4)
318 return USB_STOR_TRANSPORT_ERROR;
319 if ((fst->Status & 1) != 0) {
320 usb_stor_dbg(us, "operation failed\n");
321 return USB_STOR_TRANSPORT_FAILED;
322 }
323
324 /*
325 * The device might not have as much data available as we
326 * requested. If you ask for more than the device has, this reads
327 * and such will hang.
328 */
329 usb_stor_dbg(us, "Device indicates that it has %d bytes available\n",
330 le16_to_cpu(fst->Count));
331 usb_stor_dbg(us, "SCSI requested %d\n", scsi_bufflen(srb));
332
333 /* Find the length we desire to read. */
334 switch (srb->cmnd[0]) {
335 case INQUIRY:
336 case REQUEST_SENSE: /* 16 or 18 bytes? spec says 18, lots of devices only have 16 */
337 case MODE_SENSE:
338 case MODE_SENSE_10:
339 length = le16_to_cpu(fst->Count);
340 break;
341 default:
342 length = scsi_bufflen(srb);
343 }
344
345 /* verify that this amount is legal */
346 if (length > scsi_bufflen(srb)) {
347 length = scsi_bufflen(srb);
348 usb_stor_dbg(us, "Truncating request to match buffer length: %d\n",
349 length);
350 }
351
352 /*
353 * What we do now depends on what direction the data is supposed to
354 * move in.
355 */
356
357 switch (us->srb->sc_data_direction) {
358 case DMA_FROM_DEVICE:
359 /* catch bogus "read 0 length" case */
360 if (!length)
361 break;
362 /*
363 * Make sure that the status indicates that the device
364 * wants data as well.
365 */
366 if ((fst->Status & DRQ_STAT) == 0 || (fst->Reason & 3) != 2) {
367 usb_stor_dbg(us, "SCSI wants data, drive doesn't have any\n");
368 return USB_STOR_TRANSPORT_FAILED;
369 }
370 result = freecom_readdata (srb, us, ipipe, opipe, length);
371 if (result != USB_STOR_TRANSPORT_GOOD)
372 return result;
373
374 usb_stor_dbg(us, "Waiting for status\n");
375 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
376 FCM_PACKET_LENGTH, &partial);
377 US_DEBUG(pdump(us, (void *)fst, partial));
378
379 if (partial != 4 || result > USB_STOR_XFER_SHORT)
380 return USB_STOR_TRANSPORT_ERROR;
381 if ((fst->Status & ERR_STAT) != 0) {
382 usb_stor_dbg(us, "operation failed\n");
383 return USB_STOR_TRANSPORT_FAILED;
384 }
385 if ((fst->Reason & 3) != 3) {
386 usb_stor_dbg(us, "Drive seems still hungry\n");
387 return USB_STOR_TRANSPORT_FAILED;
388 }
389 usb_stor_dbg(us, "Transfer happy\n");
390 break;
391
392 case DMA_TO_DEVICE:
393 /* catch bogus "write 0 length" case */
394 if (!length)
395 break;
396 /*
397 * Make sure the status indicates that the device wants to
398 * send us data.
399 */
400 /* !!IMPLEMENT!! */
401 result = freecom_writedata (srb, us, ipipe, opipe, length);
402 if (result != USB_STOR_TRANSPORT_GOOD)
403 return result;
404
405 usb_stor_dbg(us, "Waiting for status\n");
406 result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
407 FCM_PACKET_LENGTH, &partial);
408
409 if (partial != 4 || result > USB_STOR_XFER_SHORT)
410 return USB_STOR_TRANSPORT_ERROR;
411 if ((fst->Status & ERR_STAT) != 0) {
412 usb_stor_dbg(us, "operation failed\n");
413 return USB_STOR_TRANSPORT_FAILED;
414 }
415 if ((fst->Reason & 3) != 3) {
416 usb_stor_dbg(us, "Drive seems still hungry\n");
417 return USB_STOR_TRANSPORT_FAILED;
418 }
419
420 usb_stor_dbg(us, "Transfer happy\n");
421 break;
422
423
424 case DMA_NONE:
425 /* Easy, do nothing. */
426 break;
427
428 default:
429 /* should never hit here -- filtered in usb.c */
430 usb_stor_dbg(us, "freecom unimplemented direction: %d\n",
431 us->srb->sc_data_direction);
432 /* Return fail, SCSI seems to handle this better. */
433 return USB_STOR_TRANSPORT_FAILED;
434 break;
435 }
436
437 return USB_STOR_TRANSPORT_GOOD;
438}
439
440static int init_freecom(struct us_data *us)
441{
442 int result;
443 char *buffer = us->iobuf;
444
445 /*
446 * The DMA-mapped I/O buffer is 64 bytes long, just right for
447 * all our packets. No need to allocate any extra buffer space.
448 */
449
450 result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
451 0x4c, 0xc0, 0x4346, 0x0, buffer, 0x20, 3*HZ);
452 buffer[32] = '\0';
453 usb_stor_dbg(us, "String returned from FC init is: %s\n", buffer);
454
455 /*
456 * Special thanks to the people at Freecom for providing me with
457 * this "magic sequence", which they use in their Windows and MacOS
458 * drivers to make sure that all the attached perhiperals are
459 * properly reset.
460 */
461
462 /* send reset */
463 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
464 0x4d, 0x40, 0x24d8, 0x0, NULL, 0x0, 3*HZ);
465 usb_stor_dbg(us, "result from activate reset is %d\n", result);
466
467 /* wait 250ms */
468 msleep(250);
469
470 /* clear reset */
471 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
472 0x4d, 0x40, 0x24f8, 0x0, NULL, 0x0, 3*HZ);
473 usb_stor_dbg(us, "result from clear reset is %d\n", result);
474
475 /* wait 3 seconds */
476 msleep(3 * 1000);
477
478 return USB_STOR_TRANSPORT_GOOD;
479}
480
481static int usb_stor_freecom_reset(struct us_data *us)
482{
483 printk (KERN_CRIT "freecom reset called\n");
484
485 /* We don't really have this feature. */
486 return FAILED;
487}
488
489#ifdef CONFIG_USB_STORAGE_DEBUG
490static void pdump(struct us_data *us, void *ibuffer, int length)
491{
492 static char line[80];
493 int offset = 0;
494 unsigned char *buffer = (unsigned char *) ibuffer;
495 int i, j;
496 int from, base;
497
498 offset = 0;
499 for (i = 0; i < length; i++) {
500 if ((i & 15) == 0) {
501 if (i > 0) {
502 offset += sprintf (line+offset, " - ");
503 for (j = i - 16; j < i; j++) {
504 if (buffer[j] >= 32 && buffer[j] <= 126)
505 line[offset++] = buffer[j];
506 else
507 line[offset++] = '.';
508 }
509 line[offset] = 0;
510 usb_stor_dbg(us, "%s\n", line);
511 offset = 0;
512 }
513 offset += sprintf (line+offset, "%08x:", i);
514 } else if ((i & 7) == 0) {
515 offset += sprintf (line+offset, " -");
516 }
517 offset += sprintf (line+offset, " %02x", buffer[i] & 0xff);
518 }
519
520 /* Add the last "chunk" of data. */
521 from = (length - 1) % 16;
522 base = ((length - 1) / 16) * 16;
523
524 for (i = from + 1; i < 16; i++)
525 offset += sprintf (line+offset, " ");
526 if (from < 8)
527 offset += sprintf (line+offset, " ");
528 offset += sprintf (line+offset, " - ");
529
530 for (i = 0; i <= from; i++) {
531 if (buffer[base+i] >= 32 && buffer[base+i] <= 126)
532 line[offset++] = buffer[base+i];
533 else
534 line[offset++] = '.';
535 }
536 line[offset] = 0;
537 usb_stor_dbg(us, "%s\n", line);
538 offset = 0;
539}
540#endif
541
542static struct scsi_host_template freecom_host_template;
543
544static int freecom_probe(struct usb_interface *intf,
545 const struct usb_device_id *id)
546{
547 struct us_data *us;
548 int result;
549
550 result = usb_stor_probe1(&us, intf, id,
551 (id - freecom_usb_ids) + freecom_unusual_dev_list,
552 &freecom_host_template);
553 if (result)
554 return result;
555
556 us->transport_name = "Freecom";
557 us->transport = freecom_transport;
558 us->transport_reset = usb_stor_freecom_reset;
559 us->max_lun = 0;
560
561 result = usb_stor_probe2(us);
562 return result;
563}
564
565static struct usb_driver freecom_driver = {
566 .name = DRV_NAME,
567 .probe = freecom_probe,
568 .disconnect = usb_stor_disconnect,
569 .suspend = usb_stor_suspend,
570 .resume = usb_stor_resume,
571 .reset_resume = usb_stor_reset_resume,
572 .pre_reset = usb_stor_pre_reset,
573 .post_reset = usb_stor_post_reset,
574 .id_table = freecom_usb_ids,
575 .soft_unbind = 1,
576 .no_dynamic_id = 1,
577};
578
579module_usb_stor_driver(freecom_driver, freecom_host_template, DRV_NAME);