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[u-boot] / common / usb_storage.c
1 /*
2  * Most of this source has been derived from the Linux USB
3  * project:
4  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
5  *   (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
6  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
7  *   (c) 2000 Yggdrasil Computing, Inc.
8  *
9  *
10  * Adapted for U-Boot:
11  *   (C) Copyright 2001 Denis Peter, MPL AG Switzerland
12  *
13  * For BBB support (C) Copyright 2003
14  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
15  *
16  * BBB support based on /sys/dev/usb/umass.c from
17  * FreeBSD.
18  *
19  * SPDX-License-Identifier:     GPL-2.0+
20  */
21
22 /* Note:
23  * Currently only the CBI transport protocoll has been implemented, and it
24  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
25  * transport protocoll may work as well.
26  */
27 /*
28  * New Note:
29  * Support for USB Mass Storage Devices (BBB) has been added. It has
30  * only been tested with USB memory sticks.
31  */
32
33
34 #include <common.h>
35 #include <command.h>
36 #include <inttypes.h>
37 #include <asm/byteorder.h>
38 #include <asm/processor.h>
39
40 #include <part.h>
41 #include <usb.h>
42
43 #undef BBB_COMDAT_TRACE
44 #undef BBB_XPORT_TRACE
45
46 #include <scsi.h>
47 /* direction table -- this indicates the direction of the data
48  * transfer for each command code -- a 1 indicates input
49  */
50 static const unsigned char us_direction[256/8] = {
51         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
52         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
53         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
54         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
55 };
56 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
57
58 static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
59
60 /*
61  * CBI style
62  */
63
64 #define US_CBI_ADSC             0
65
66 /*
67  * BULK only
68  */
69 #define US_BBB_RESET            0xff
70 #define US_BBB_GET_MAX_LUN      0xfe
71
72 /* Command Block Wrapper */
73 typedef struct {
74         __u32           dCBWSignature;
75 #       define CBWSIGNATURE     0x43425355
76         __u32           dCBWTag;
77         __u32           dCBWDataTransferLength;
78         __u8            bCBWFlags;
79 #       define CBWFLAGS_OUT     0x00
80 #       define CBWFLAGS_IN      0x80
81         __u8            bCBWLUN;
82         __u8            bCDBLength;
83 #       define CBWCDBLENGTH     16
84         __u8            CBWCDB[CBWCDBLENGTH];
85 } umass_bbb_cbw_t;
86 #define UMASS_BBB_CBW_SIZE      31
87 static __u32 CBWTag;
88
89 /* Command Status Wrapper */
90 typedef struct {
91         __u32           dCSWSignature;
92 #       define CSWSIGNATURE     0x53425355
93         __u32           dCSWTag;
94         __u32           dCSWDataResidue;
95         __u8            bCSWStatus;
96 #       define CSWSTATUS_GOOD   0x0
97 #       define CSWSTATUS_FAILED 0x1
98 #       define CSWSTATUS_PHASE  0x2
99 } umass_bbb_csw_t;
100 #define UMASS_BBB_CSW_SIZE      13
101
102 #define USB_MAX_STOR_DEV 5
103 static int usb_max_devs; /* number of highest available usb device */
104
105 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
106
107 struct us_data;
108 typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
109 typedef int (*trans_reset)(struct us_data *data);
110
111 struct us_data {
112         struct usb_device *pusb_dev;     /* this usb_device */
113
114         unsigned int    flags;                  /* from filter initially */
115 #       define USB_READY        (1 << 0)
116         unsigned char   ifnum;                  /* interface number */
117         unsigned char   ep_in;                  /* in endpoint */
118         unsigned char   ep_out;                 /* out ....... */
119         unsigned char   ep_int;                 /* interrupt . */
120         unsigned char   subclass;               /* as in overview */
121         unsigned char   protocol;               /* .............. */
122         unsigned char   attention_done;         /* force attn on first cmd */
123         unsigned short  ip_data;                /* interrupt data */
124         int             action;                 /* what to do */
125         int             ip_wanted;              /* needed */
126         int             *irq_handle;            /* for USB int requests */
127         unsigned int    irqpipe;                /* pipe for release_irq */
128         unsigned char   irqmaxp;                /* max packed for irq Pipe */
129         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
130         ccb             *srb;                   /* current srb */
131         trans_reset     transport_reset;        /* reset routine */
132         trans_cmnd      transport;              /* transport routine */
133 };
134
135 #ifdef CONFIG_USB_EHCI
136 /*
137  * The U-Boot EHCI driver can handle any transfer length as long as there is
138  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
139  * limited to 65535 blocks.
140  */
141 #define USB_MAX_XFER_BLK        65535
142 #else
143 #define USB_MAX_XFER_BLK        20
144 #endif
145
146 static struct us_data usb_stor[USB_MAX_STOR_DEV];
147
148
149 #define USB_STOR_TRANSPORT_GOOD    0
150 #define USB_STOR_TRANSPORT_FAILED -1
151 #define USB_STOR_TRANSPORT_ERROR  -2
152
153 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
154                       block_dev_desc_t *dev_desc);
155 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
156                       struct us_data *ss);
157 unsigned long usb_stor_read(int device, lbaint_t blknr,
158                             lbaint_t blkcnt, void *buffer);
159 unsigned long usb_stor_write(int device, lbaint_t blknr,
160                              lbaint_t blkcnt, const void *buffer);
161 struct usb_device * usb_get_dev_index(int index);
162 void uhci_show_temp_int_td(void);
163
164 #ifdef CONFIG_PARTITIONS
165 block_dev_desc_t *usb_stor_get_dev(int index)
166 {
167         return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
168 }
169 #endif
170
171 static void usb_show_progress(void)
172 {
173         debug(".");
174 }
175
176 /*******************************************************************************
177  * show info on storage devices; 'usb start/init' must be invoked earlier
178  * as we only retrieve structures populated during devices initialization
179  */
180 int usb_stor_info(void)
181 {
182         int i;
183
184         if (usb_max_devs > 0) {
185                 for (i = 0; i < usb_max_devs; i++) {
186                         printf("  Device %d: ", i);
187                         dev_print(&usb_dev_desc[i]);
188                 }
189                 return 0;
190         }
191
192         printf("No storage devices, perhaps not 'usb start'ed..?\n");
193         return 1;
194 }
195
196 static unsigned int usb_get_max_lun(struct us_data *us)
197 {
198         int len;
199         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
200         len = usb_control_msg(us->pusb_dev,
201                               usb_rcvctrlpipe(us->pusb_dev, 0),
202                               US_BBB_GET_MAX_LUN,
203                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
204                               0, us->ifnum,
205                               result, sizeof(char),
206                               USB_CNTL_TIMEOUT * 5);
207         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
208         return (len > 0) ? *result : 0;
209 }
210
211 /*******************************************************************************
212  * scan the usb and reports device info
213  * to the user if mode = 1
214  * returns current device or -1 if no
215  */
216 int usb_stor_scan(int mode)
217 {
218         unsigned char i;
219         struct usb_device *dev;
220
221         if (mode == 1)
222                 printf("       scanning usb for storage devices... ");
223
224         usb_disable_asynch(1); /* asynch transfer not allowed */
225
226         for (i = 0; i < USB_MAX_STOR_DEV; i++) {
227                 memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
228                 usb_dev_desc[i].if_type = IF_TYPE_USB;
229                 usb_dev_desc[i].dev = i;
230                 usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
231                 usb_dev_desc[i].target = 0xff;
232                 usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
233                 usb_dev_desc[i].block_read = usb_stor_read;
234                 usb_dev_desc[i].block_write = usb_stor_write;
235         }
236
237         usb_max_devs = 0;
238         for (i = 0; i < USB_MAX_DEVICE; i++) {
239                 dev = usb_get_dev_index(i); /* get device */
240                 debug("i=%d\n", i);
241                 if (dev == NULL)
242                         break; /* no more devices available */
243
244                 if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
245                         /* OK, it's a storage device.  Iterate over its LUNs
246                          * and populate `usb_dev_desc'.
247                          */
248                         int lun, max_lun, start = usb_max_devs;
249
250                         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
251                         for (lun = 0;
252                              lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
253                              lun++) {
254                                 usb_dev_desc[usb_max_devs].lun = lun;
255                                 if (usb_stor_get_info(dev, &usb_stor[start],
256                                     &usb_dev_desc[usb_max_devs]) == 1) {
257                                         usb_max_devs++;
258                                 }
259                         }
260                 }
261                 /* if storage device */
262                 if (usb_max_devs == USB_MAX_STOR_DEV) {
263                         printf("max USB Storage Device reached: %d stopping\n",
264                                 usb_max_devs);
265                         break;
266                 }
267         } /* for */
268
269         usb_disable_asynch(0); /* asynch transfer allowed */
270         printf("%d Storage Device(s) found\n", usb_max_devs);
271         if (usb_max_devs > 0)
272                 return 0;
273         return -1;
274 }
275
276 static int usb_stor_irq(struct usb_device *dev)
277 {
278         struct us_data *us;
279         us = (struct us_data *)dev->privptr;
280
281         if (us->ip_wanted)
282                 us->ip_wanted = 0;
283         return 0;
284 }
285
286
287 #ifdef  DEBUG
288
289 static void usb_show_srb(ccb *pccb)
290 {
291         int i;
292         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
293         for (i = 0; i < 12; i++)
294                 printf("%02X ", pccb->cmd[i]);
295         printf("\n");
296 }
297
298 static void display_int_status(unsigned long tmp)
299 {
300         printf("Status: %s %s %s %s %s %s %s\n",
301                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
302                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
303                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
304                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
305                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
306                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
307                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
308 }
309 #endif
310 /***********************************************************************
311  * Data transfer routines
312  ***********************************************************************/
313
314 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
315 {
316         int max_size;
317         int this_xfer;
318         int result;
319         int partial;
320         int maxtry;
321         int stat;
322
323         /* determine the maximum packet size for these transfers */
324         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
325
326         /* while we have data left to transfer */
327         while (length) {
328
329                 /* calculate how long this will be -- maximum or a remainder */
330                 this_xfer = length > max_size ? max_size : length;
331                 length -= this_xfer;
332
333                 /* setup the retry counter */
334                 maxtry = 10;
335
336                 /* set up the transfer loop */
337                 do {
338                         /* transfer the data */
339                         debug("Bulk xfer 0x%x(%d) try #%d\n",
340                               (unsigned int)buf, this_xfer, 11 - maxtry);
341                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
342                                               this_xfer, &partial,
343                                               USB_CNTL_TIMEOUT * 5);
344                         debug("bulk_msg returned %d xferred %d/%d\n",
345                               result, partial, this_xfer);
346                         if (us->pusb_dev->status != 0) {
347                                 /* if we stall, we need to clear it before
348                                  * we go on
349                                  */
350 #ifdef DEBUG
351                                 display_int_status(us->pusb_dev->status);
352 #endif
353                                 if (us->pusb_dev->status & USB_ST_STALLED) {
354                                         debug("stalled ->clearing endpoint" \
355                                               "halt for pipe 0x%x\n", pipe);
356                                         stat = us->pusb_dev->status;
357                                         usb_clear_halt(us->pusb_dev, pipe);
358                                         us->pusb_dev->status = stat;
359                                         if (this_xfer == partial) {
360                                                 debug("bulk transferred" \
361                                                       "with error %lX," \
362                                                       " but data ok\n",
363                                                       us->pusb_dev->status);
364                                                 return 0;
365                                         }
366                                         else
367                                                 return result;
368                                 }
369                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
370                                         debug("Device NAKed bulk_msg\n");
371                                         return result;
372                                 }
373                                 debug("bulk transferred with error");
374                                 if (this_xfer == partial) {
375                                         debug(" %ld, but data ok\n",
376                                               us->pusb_dev->status);
377                                         return 0;
378                                 }
379                                 /* if our try counter reaches 0, bail out */
380                                         debug(" %ld, data %d\n",
381                                               us->pusb_dev->status, partial);
382                                 if (!maxtry--)
383                                                 return result;
384                         }
385                         /* update to show what data was transferred */
386                         this_xfer -= partial;
387                         buf += partial;
388                         /* continue until this transfer is done */
389                 } while (this_xfer);
390         }
391
392         /* if we get here, we're done and successful */
393         return 0;
394 }
395
396 static int usb_stor_BBB_reset(struct us_data *us)
397 {
398         int result;
399         unsigned int pipe;
400
401         /*
402          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
403          *
404          * For Reset Recovery the host shall issue in the following order:
405          * a) a Bulk-Only Mass Storage Reset
406          * b) a Clear Feature HALT to the Bulk-In endpoint
407          * c) a Clear Feature HALT to the Bulk-Out endpoint
408          *
409          * This is done in 3 steps.
410          *
411          * If the reset doesn't succeed, the device should be port reset.
412          *
413          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
414          */
415         debug("BBB_reset\n");
416         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
417                                  US_BBB_RESET,
418                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
419                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
420
421         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
422                 debug("RESET:stall\n");
423                 return -1;
424         }
425
426         /* long wait for reset */
427         mdelay(150);
428         debug("BBB_reset result %d: status %lX reset\n",
429               result, us->pusb_dev->status);
430         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
431         result = usb_clear_halt(us->pusb_dev, pipe);
432         /* long wait for reset */
433         mdelay(150);
434         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
435               result, us->pusb_dev->status);
436         /* long wait for reset */
437         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
438         result = usb_clear_halt(us->pusb_dev, pipe);
439         mdelay(150);
440         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
441               result, us->pusb_dev->status);
442         debug("BBB_reset done\n");
443         return 0;
444 }
445
446 /* FIXME: this reset function doesn't really reset the port, and it
447  * should. Actually it should probably do what it's doing here, and
448  * reset the port physically
449  */
450 static int usb_stor_CB_reset(struct us_data *us)
451 {
452         unsigned char cmd[12];
453         int result;
454
455         debug("CB_reset\n");
456         memset(cmd, 0xff, sizeof(cmd));
457         cmd[0] = SCSI_SEND_DIAG;
458         cmd[1] = 4;
459         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
460                                  US_CBI_ADSC,
461                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
462                                  0, us->ifnum, cmd, sizeof(cmd),
463                                  USB_CNTL_TIMEOUT * 5);
464
465         /* long wait for reset */
466         mdelay(1500);
467         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
468               result, us->pusb_dev->status);
469         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
470         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
471
472         debug("CB_reset done\n");
473         return 0;
474 }
475
476 /*
477  * Set up the command for a BBB device. Note that the actual SCSI
478  * command is copied into cbw.CBWCDB.
479  */
480 static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
481 {
482         int result;
483         int actlen;
484         int dir_in;
485         unsigned int pipe;
486         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw, 1);
487
488         dir_in = US_DIRECTION(srb->cmd[0]);
489
490 #ifdef BBB_COMDAT_TRACE
491         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
492                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
493                 srb->pdata);
494         if (srb->cmdlen) {
495                 for (result = 0; result < srb->cmdlen; result++)
496                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
497                 printf("\n");
498         }
499 #endif
500         /* sanity checks */
501         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
502                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
503                 return -1;
504         }
505
506         /* always OUT to the ep */
507         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
508
509         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
510         cbw->dCBWTag = cpu_to_le32(CBWTag++);
511         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
512         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
513         cbw->bCBWLUN = srb->lun;
514         cbw->bCDBLength = srb->cmdlen;
515         /* copy the command data into the CBW command data buffer */
516         /* DST SRC LEN!!! */
517         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
518         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
519                               &actlen, USB_CNTL_TIMEOUT * 5);
520         if (result < 0)
521                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
522         return result;
523 }
524
525 /* FIXME: we also need a CBI_command which sets up the completion
526  * interrupt, and waits for it
527  */
528 static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
529 {
530         int result = 0;
531         int dir_in, retry;
532         unsigned int pipe;
533         unsigned long status;
534
535         retry = 5;
536         dir_in = US_DIRECTION(srb->cmd[0]);
537
538         if (dir_in)
539                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
540         else
541                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
542
543         while (retry--) {
544                 debug("CBI gets a command: Try %d\n", 5 - retry);
545 #ifdef DEBUG
546                 usb_show_srb(srb);
547 #endif
548                 /* let's send the command via the control pipe */
549                 result = usb_control_msg(us->pusb_dev,
550                                          usb_sndctrlpipe(us->pusb_dev , 0),
551                                          US_CBI_ADSC,
552                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
553                                          0, us->ifnum,
554                                          srb->cmd, srb->cmdlen,
555                                          USB_CNTL_TIMEOUT * 5);
556                 debug("CB_transport: control msg returned %d, status %lX\n",
557                       result, us->pusb_dev->status);
558                 /* check the return code for the command */
559                 if (result < 0) {
560                         if (us->pusb_dev->status & USB_ST_STALLED) {
561                                 status = us->pusb_dev->status;
562                                 debug(" stall during command found," \
563                                       " clear pipe\n");
564                                 usb_clear_halt(us->pusb_dev,
565                                               usb_sndctrlpipe(us->pusb_dev, 0));
566                                 us->pusb_dev->status = status;
567                         }
568                         debug(" error during command %02X" \
569                               " Stat = %lX\n", srb->cmd[0],
570                               us->pusb_dev->status);
571                         return result;
572                 }
573                 /* transfer the data payload for this command, if one exists*/
574
575                 debug("CB_transport: control msg returned %d," \
576                       " direction is %s to go 0x%lx\n", result,
577                       dir_in ? "IN" : "OUT", srb->datalen);
578                 if (srb->datalen) {
579                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
580                                                  srb->datalen);
581                         debug("CBI attempted to transfer data," \
582                               " result is %d status %lX, len %d\n",
583                               result, us->pusb_dev->status,
584                                 us->pusb_dev->act_len);
585                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
586                                 break;
587                 } /* if (srb->datalen) */
588                 else
589                         break;
590         }
591         /* return result */
592
593         return result;
594 }
595
596
597 static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
598 {
599         int timeout;
600
601         us->ip_wanted = 1;
602         submit_int_msg(us->pusb_dev, us->irqpipe,
603                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
604         timeout = 1000;
605         while (timeout--) {
606                 if ((volatile int *) us->ip_wanted == NULL)
607                         break;
608                 mdelay(10);
609         }
610         if (us->ip_wanted) {
611                 printf("        Did not get interrupt on CBI\n");
612                 us->ip_wanted = 0;
613                 return USB_STOR_TRANSPORT_ERROR;
614         }
615         debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
616               us->ip_data, us->pusb_dev->irq_act_len,
617               us->pusb_dev->irq_status);
618         /* UFI gives us ASC and ASCQ, like a request sense */
619         if (us->subclass == US_SC_UFI) {
620                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
621                     srb->cmd[0] == SCSI_INQUIRY)
622                         return USB_STOR_TRANSPORT_GOOD; /* Good */
623                 else if (us->ip_data)
624                         return USB_STOR_TRANSPORT_FAILED;
625                 else
626                         return USB_STOR_TRANSPORT_GOOD;
627         }
628         /* otherwise, we interpret the data normally */
629         switch (us->ip_data) {
630         case 0x0001:
631                 return USB_STOR_TRANSPORT_GOOD;
632         case 0x0002:
633                 return USB_STOR_TRANSPORT_FAILED;
634         default:
635                 return USB_STOR_TRANSPORT_ERROR;
636         }                       /* switch */
637         return USB_STOR_TRANSPORT_ERROR;
638 }
639
640 #define USB_TRANSPORT_UNKNOWN_RETRY 5
641 #define USB_TRANSPORT_NOT_READY_RETRY 10
642
643 /* clear a stall on an endpoint - special for BBB devices */
644 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
645 {
646         int result;
647
648         /* ENDPOINT_HALT = 0, so set value to 0 */
649         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
650                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
651                                 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
652         return result;
653 }
654
655 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
656 {
657         int result, retry;
658         int dir_in;
659         int actlen, data_actlen;
660         unsigned int pipe, pipein, pipeout;
661         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_csw_t, csw, 1);
662 #ifdef BBB_XPORT_TRACE
663         unsigned char *ptr;
664         int index;
665 #endif
666
667         dir_in = US_DIRECTION(srb->cmd[0]);
668
669         /* COMMAND phase */
670         debug("COMMAND phase\n");
671         result = usb_stor_BBB_comdat(srb, us);
672         if (result < 0) {
673                 debug("failed to send CBW status %ld\n",
674                       us->pusb_dev->status);
675                 usb_stor_BBB_reset(us);
676                 return USB_STOR_TRANSPORT_FAILED;
677         }
678         if (!(us->flags & USB_READY))
679                 mdelay(5);
680         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
681         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
682         /* DATA phase + error handling */
683         data_actlen = 0;
684         /* no data, go immediately to the STATUS phase */
685         if (srb->datalen == 0)
686                 goto st;
687         debug("DATA phase\n");
688         if (dir_in)
689                 pipe = pipein;
690         else
691                 pipe = pipeout;
692         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
693                               &data_actlen, USB_CNTL_TIMEOUT * 5);
694         /* special handling of STALL in DATA phase */
695         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
696                 debug("DATA:stall\n");
697                 /* clear the STALL on the endpoint */
698                 result = usb_stor_BBB_clear_endpt_stall(us,
699                                         dir_in ? us->ep_in : us->ep_out);
700                 if (result >= 0)
701                         /* continue on to STATUS phase */
702                         goto st;
703         }
704         if (result < 0) {
705                 debug("usb_bulk_msg error status %ld\n",
706                       us->pusb_dev->status);
707                 usb_stor_BBB_reset(us);
708                 return USB_STOR_TRANSPORT_FAILED;
709         }
710 #ifdef BBB_XPORT_TRACE
711         for (index = 0; index < data_actlen; index++)
712                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
713         printf("\n");
714 #endif
715         /* STATUS phase + error handling */
716 st:
717         retry = 0;
718 again:
719         debug("STATUS phase\n");
720         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
721                                 &actlen, USB_CNTL_TIMEOUT*5);
722
723         /* special handling of STALL in STATUS phase */
724         if ((result < 0) && (retry < 1) &&
725             (us->pusb_dev->status & USB_ST_STALLED)) {
726                 debug("STATUS:stall\n");
727                 /* clear the STALL on the endpoint */
728                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
729                 if (result >= 0 && (retry++ < 1))
730                         /* do a retry */
731                         goto again;
732         }
733         if (result < 0) {
734                 debug("usb_bulk_msg error status %ld\n",
735                       us->pusb_dev->status);
736                 usb_stor_BBB_reset(us);
737                 return USB_STOR_TRANSPORT_FAILED;
738         }
739 #ifdef BBB_XPORT_TRACE
740         ptr = (unsigned char *)csw;
741         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
742                 printf("ptr[%d] %#x ", index, ptr[index]);
743         printf("\n");
744 #endif
745         /* misuse pipe to get the residue */
746         pipe = le32_to_cpu(csw->dCSWDataResidue);
747         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
748                 pipe = srb->datalen - data_actlen;
749         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
750                 debug("!CSWSIGNATURE\n");
751                 usb_stor_BBB_reset(us);
752                 return USB_STOR_TRANSPORT_FAILED;
753         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
754                 debug("!Tag\n");
755                 usb_stor_BBB_reset(us);
756                 return USB_STOR_TRANSPORT_FAILED;
757         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
758                 debug(">PHASE\n");
759                 usb_stor_BBB_reset(us);
760                 return USB_STOR_TRANSPORT_FAILED;
761         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
762                 debug("=PHASE\n");
763                 usb_stor_BBB_reset(us);
764                 return USB_STOR_TRANSPORT_FAILED;
765         } else if (data_actlen > srb->datalen) {
766                 debug("transferred %dB instead of %ldB\n",
767                       data_actlen, srb->datalen);
768                 return USB_STOR_TRANSPORT_FAILED;
769         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
770                 debug("FAILED\n");
771                 return USB_STOR_TRANSPORT_FAILED;
772         }
773
774         return result;
775 }
776
777 static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
778 {
779         int result, status;
780         ccb *psrb;
781         ccb reqsrb;
782         int retry, notready;
783
784         psrb = &reqsrb;
785         status = USB_STOR_TRANSPORT_GOOD;
786         retry = 0;
787         notready = 0;
788         /* issue the command */
789 do_retry:
790         result = usb_stor_CB_comdat(srb, us);
791         debug("command / Data returned %d, status %lX\n",
792               result, us->pusb_dev->status);
793         /* if this is an CBI Protocol, get IRQ */
794         if (us->protocol == US_PR_CBI) {
795                 status = usb_stor_CBI_get_status(srb, us);
796                 /* if the status is error, report it */
797                 if (status == USB_STOR_TRANSPORT_ERROR) {
798                         debug(" USB CBI Command Error\n");
799                         return status;
800                 }
801                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
802                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
803                 if (!us->ip_data) {
804                         /* if the status is good, report it */
805                         if (status == USB_STOR_TRANSPORT_GOOD) {
806                                 debug(" USB CBI Command Good\n");
807                                 return status;
808                         }
809                 }
810         }
811         /* do we have to issue an auto request? */
812         /* HERE we have to check the result */
813         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
814                 debug("ERROR %lX\n", us->pusb_dev->status);
815                 us->transport_reset(us);
816                 return USB_STOR_TRANSPORT_ERROR;
817         }
818         if ((us->protocol == US_PR_CBI) &&
819             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
820             (srb->cmd[0] == SCSI_INQUIRY))) {
821                 /* do not issue an autorequest after request sense */
822                 debug("No auto request and good\n");
823                 return USB_STOR_TRANSPORT_GOOD;
824         }
825         /* issue an request_sense */
826         memset(&psrb->cmd[0], 0, 12);
827         psrb->cmd[0] = SCSI_REQ_SENSE;
828         psrb->cmd[1] = srb->lun << 5;
829         psrb->cmd[4] = 18;
830         psrb->datalen = 18;
831         psrb->pdata = &srb->sense_buf[0];
832         psrb->cmdlen = 12;
833         /* issue the command */
834         result = usb_stor_CB_comdat(psrb, us);
835         debug("auto request returned %d\n", result);
836         /* if this is an CBI Protocol, get IRQ */
837         if (us->protocol == US_PR_CBI)
838                 status = usb_stor_CBI_get_status(psrb, us);
839
840         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
841                 debug(" AUTO REQUEST ERROR %ld\n",
842                       us->pusb_dev->status);
843                 return USB_STOR_TRANSPORT_ERROR;
844         }
845         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
846               srb->sense_buf[0], srb->sense_buf[2],
847               srb->sense_buf[12], srb->sense_buf[13]);
848         /* Check the auto request result */
849         if ((srb->sense_buf[2] == 0) &&
850             (srb->sense_buf[12] == 0) &&
851             (srb->sense_buf[13] == 0)) {
852                 /* ok, no sense */
853                 return USB_STOR_TRANSPORT_GOOD;
854         }
855
856         /* Check the auto request result */
857         switch (srb->sense_buf[2]) {
858         case 0x01:
859                 /* Recovered Error */
860                 return USB_STOR_TRANSPORT_GOOD;
861                 break;
862         case 0x02:
863                 /* Not Ready */
864                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
865                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
866                                " 0x%02X (NOT READY)\n", srb->cmd[0],
867                                 srb->sense_buf[0], srb->sense_buf[2],
868                                 srb->sense_buf[12], srb->sense_buf[13]);
869                         return USB_STOR_TRANSPORT_FAILED;
870                 } else {
871                         mdelay(100);
872                         goto do_retry;
873                 }
874                 break;
875         default:
876                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
877                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
878                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
879                                 srb->sense_buf[2], srb->sense_buf[12],
880                                 srb->sense_buf[13]);
881                         return USB_STOR_TRANSPORT_FAILED;
882                 } else
883                         goto do_retry;
884                 break;
885         }
886         return USB_STOR_TRANSPORT_FAILED;
887 }
888
889
890 static int usb_inquiry(ccb *srb, struct us_data *ss)
891 {
892         int retry, i;
893         retry = 5;
894         do {
895                 memset(&srb->cmd[0], 0, 12);
896                 srb->cmd[0] = SCSI_INQUIRY;
897                 srb->cmd[1] = srb->lun << 5;
898                 srb->cmd[4] = 36;
899                 srb->datalen = 36;
900                 srb->cmdlen = 12;
901                 i = ss->transport(srb, ss);
902                 debug("inquiry returns %d\n", i);
903                 if (i == 0)
904                         break;
905         } while (--retry);
906
907         if (!retry) {
908                 printf("error in inquiry\n");
909                 return -1;
910         }
911         return 0;
912 }
913
914 static int usb_request_sense(ccb *srb, struct us_data *ss)
915 {
916         char *ptr;
917
918         ptr = (char *)srb->pdata;
919         memset(&srb->cmd[0], 0, 12);
920         srb->cmd[0] = SCSI_REQ_SENSE;
921         srb->cmd[1] = srb->lun << 5;
922         srb->cmd[4] = 18;
923         srb->datalen = 18;
924         srb->pdata = &srb->sense_buf[0];
925         srb->cmdlen = 12;
926         ss->transport(srb, ss);
927         debug("Request Sense returned %02X %02X %02X\n",
928               srb->sense_buf[2], srb->sense_buf[12],
929               srb->sense_buf[13]);
930         srb->pdata = (uchar *)ptr;
931         return 0;
932 }
933
934 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
935 {
936         int retries = 10;
937
938         do {
939                 memset(&srb->cmd[0], 0, 12);
940                 srb->cmd[0] = SCSI_TST_U_RDY;
941                 srb->cmd[1] = srb->lun << 5;
942                 srb->datalen = 0;
943                 srb->cmdlen = 12;
944                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
945                         ss->flags |= USB_READY;
946                         return 0;
947                 }
948                 usb_request_sense(srb, ss);
949                 /*
950                  * Check the Key Code Qualifier, if it matches
951                  * "Not Ready - medium not present"
952                  * (the sense Key equals 0x2 and the ASC is 0x3a)
953                  * return immediately as the medium being absent won't change
954                  * unless there is a user action.
955                  */
956                 if ((srb->sense_buf[2] == 0x02) &&
957                     (srb->sense_buf[12] == 0x3a))
958                         return -1;
959                 mdelay(100);
960         } while (retries--);
961
962         return -1;
963 }
964
965 static int usb_read_capacity(ccb *srb, struct us_data *ss)
966 {
967         int retry;
968         /* XXX retries */
969         retry = 3;
970         do {
971                 memset(&srb->cmd[0], 0, 12);
972                 srb->cmd[0] = SCSI_RD_CAPAC;
973                 srb->cmd[1] = srb->lun << 5;
974                 srb->datalen = 8;
975                 srb->cmdlen = 12;
976                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
977                         return 0;
978         } while (retry--);
979
980         return -1;
981 }
982
983 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
984                        unsigned short blocks)
985 {
986         memset(&srb->cmd[0], 0, 12);
987         srb->cmd[0] = SCSI_READ10;
988         srb->cmd[1] = srb->lun << 5;
989         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
990         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
991         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
992         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
993         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
994         srb->cmd[8] = (unsigned char) blocks & 0xff;
995         srb->cmdlen = 12;
996         debug("read10: start %lx blocks %x\n", start, blocks);
997         return ss->transport(srb, ss);
998 }
999
1000 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
1001                         unsigned short blocks)
1002 {
1003         memset(&srb->cmd[0], 0, 12);
1004         srb->cmd[0] = SCSI_WRITE10;
1005         srb->cmd[1] = srb->lun << 5;
1006         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1007         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1008         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1009         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1010         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1011         srb->cmd[8] = (unsigned char) blocks & 0xff;
1012         srb->cmdlen = 12;
1013         debug("write10: start %lx blocks %x\n", start, blocks);
1014         return ss->transport(srb, ss);
1015 }
1016
1017
1018 #ifdef CONFIG_USB_BIN_FIXUP
1019 /*
1020  * Some USB storage devices queried for SCSI identification data respond with
1021  * binary strings, which if output to the console freeze the terminal. The
1022  * workaround is to modify the vendor and product strings read from such
1023  * device with proper values (as reported by 'usb info').
1024  *
1025  * Vendor and product length limits are taken from the definition of
1026  * block_dev_desc_t in include/part.h.
1027  */
1028 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1029                                 unsigned char vendor[],
1030                                 unsigned char product[]) {
1031         const unsigned char max_vendor_len = 40;
1032         const unsigned char max_product_len = 20;
1033         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1034                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1035                 strncpy((char *)product, "Flash Media Cntrller",
1036                         max_product_len);
1037         }
1038 }
1039 #endif /* CONFIG_USB_BIN_FIXUP */
1040
1041 unsigned long usb_stor_read(int device, lbaint_t blknr,
1042                             lbaint_t blkcnt, void *buffer)
1043 {
1044         lbaint_t start, blks;
1045         uintptr_t buf_addr;
1046         unsigned short smallblks;
1047         struct usb_device *dev;
1048         struct us_data *ss;
1049         int retry, i;
1050         ccb *srb = &usb_ccb;
1051
1052         if (blkcnt == 0)
1053                 return 0;
1054
1055         device &= 0xff;
1056         /* Setup  device */
1057         debug("\nusb_read: dev %d \n", device);
1058         dev = NULL;
1059         for (i = 0; i < USB_MAX_DEVICE; i++) {
1060                 dev = usb_get_dev_index(i);
1061                 if (dev == NULL)
1062                         return 0;
1063                 if (dev->devnum == usb_dev_desc[device].target)
1064                         break;
1065         }
1066         ss = (struct us_data *)dev->privptr;
1067
1068         usb_disable_asynch(1); /* asynch transfer not allowed */
1069         srb->lun = usb_dev_desc[device].lun;
1070         buf_addr = (unsigned long)buffer;
1071         start = blknr;
1072         blks = blkcnt;
1073
1074         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
1075               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1076
1077         do {
1078                 /* XXX need some comment here */
1079                 retry = 2;
1080                 srb->pdata = (unsigned char *)buf_addr;
1081                 if (blks > USB_MAX_XFER_BLK)
1082                         smallblks = USB_MAX_XFER_BLK;
1083                 else
1084                         smallblks = (unsigned short) blks;
1085 retry_it:
1086                 if (smallblks == USB_MAX_XFER_BLK)
1087                         usb_show_progress();
1088                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1089                 srb->pdata = (unsigned char *)buf_addr;
1090                 if (usb_read_10(srb, ss, start, smallblks)) {
1091                         debug("Read ERROR\n");
1092                         usb_request_sense(srb, ss);
1093                         if (retry--)
1094                                 goto retry_it;
1095                         blkcnt -= blks;
1096                         break;
1097                 }
1098                 start += smallblks;
1099                 blks -= smallblks;
1100                 buf_addr += srb->datalen;
1101         } while (blks != 0);
1102         ss->flags &= ~USB_READY;
1103
1104         debug("usb_read: end startblk " LBAF
1105               ", blccnt %x buffer %" PRIxPTR "\n",
1106               start, smallblks, buf_addr);
1107
1108         usb_disable_asynch(0); /* asynch transfer allowed */
1109         if (blkcnt >= USB_MAX_XFER_BLK)
1110                 debug("\n");
1111         return blkcnt;
1112 }
1113
1114 unsigned long usb_stor_write(int device, lbaint_t blknr,
1115                                 lbaint_t blkcnt, const void *buffer)
1116 {
1117         lbaint_t start, blks;
1118         uintptr_t buf_addr;
1119         unsigned short smallblks;
1120         struct usb_device *dev;
1121         struct us_data *ss;
1122         int retry, i;
1123         ccb *srb = &usb_ccb;
1124
1125         if (blkcnt == 0)
1126                 return 0;
1127
1128         device &= 0xff;
1129         /* Setup  device */
1130         debug("\nusb_write: dev %d \n", device);
1131         dev = NULL;
1132         for (i = 0; i < USB_MAX_DEVICE; i++) {
1133                 dev = usb_get_dev_index(i);
1134                 if (dev == NULL)
1135                         return 0;
1136                 if (dev->devnum == usb_dev_desc[device].target)
1137                         break;
1138         }
1139         ss = (struct us_data *)dev->privptr;
1140
1141         usb_disable_asynch(1); /* asynch transfer not allowed */
1142
1143         srb->lun = usb_dev_desc[device].lun;
1144         buf_addr = (unsigned long)buffer;
1145         start = blknr;
1146         blks = blkcnt;
1147
1148         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
1149               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1150
1151         do {
1152                 /* If write fails retry for max retry count else
1153                  * return with number of blocks written successfully.
1154                  */
1155                 retry = 2;
1156                 srb->pdata = (unsigned char *)buf_addr;
1157                 if (blks > USB_MAX_XFER_BLK)
1158                         smallblks = USB_MAX_XFER_BLK;
1159                 else
1160                         smallblks = (unsigned short) blks;
1161 retry_it:
1162                 if (smallblks == USB_MAX_XFER_BLK)
1163                         usb_show_progress();
1164                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1165                 srb->pdata = (unsigned char *)buf_addr;
1166                 if (usb_write_10(srb, ss, start, smallblks)) {
1167                         debug("Write ERROR\n");
1168                         usb_request_sense(srb, ss);
1169                         if (retry--)
1170                                 goto retry_it;
1171                         blkcnt -= blks;
1172                         break;
1173                 }
1174                 start += smallblks;
1175                 blks -= smallblks;
1176                 buf_addr += srb->datalen;
1177         } while (blks != 0);
1178         ss->flags &= ~USB_READY;
1179
1180         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1181               PRIxPTR "\n", start, smallblks, buf_addr);
1182
1183         usb_disable_asynch(0); /* asynch transfer allowed */
1184         if (blkcnt >= USB_MAX_XFER_BLK)
1185                 debug("\n");
1186         return blkcnt;
1187
1188 }
1189
1190 /* Probe to see if a new device is actually a Storage device */
1191 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1192                       struct us_data *ss)
1193 {
1194         struct usb_interface *iface;
1195         int i;
1196         struct usb_endpoint_descriptor *ep_desc;
1197         unsigned int flags = 0;
1198
1199         int protocol = 0;
1200         int subclass = 0;
1201
1202         /* let's examine the device now */
1203         iface = &dev->config.if_desc[ifnum];
1204
1205 #if 0
1206         /* this is the place to patch some storage devices */
1207         debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1208                         dev->descriptor.idProduct);
1209
1210         if ((dev->descriptor.idVendor) == 0x066b &&
1211             (dev->descriptor.idProduct) == 0x0103) {
1212                 debug("patched for E-USB\n");
1213                 protocol = US_PR_CB;
1214                 subclass = US_SC_UFI;       /* an assumption */
1215         }
1216 #endif
1217
1218         if (dev->descriptor.bDeviceClass != 0 ||
1219                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1220                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1221                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1222                 /* if it's not a mass storage, we go no further */
1223                 return 0;
1224         }
1225
1226         memset(ss, 0, sizeof(struct us_data));
1227
1228         /* At this point, we know we've got a live one */
1229         debug("\n\nUSB Mass Storage device detected\n");
1230
1231         /* Initialize the us_data structure with some useful info */
1232         ss->flags = flags;
1233         ss->ifnum = ifnum;
1234         ss->pusb_dev = dev;
1235         ss->attention_done = 0;
1236
1237         /* If the device has subclass and protocol, then use that.  Otherwise,
1238          * take data from the specific interface.
1239          */
1240         if (subclass) {
1241                 ss->subclass = subclass;
1242                 ss->protocol = protocol;
1243         } else {
1244                 ss->subclass = iface->desc.bInterfaceSubClass;
1245                 ss->protocol = iface->desc.bInterfaceProtocol;
1246         }
1247
1248         /* set the handler pointers based on the protocol */
1249         debug("Transport: ");
1250         switch (ss->protocol) {
1251         case US_PR_CB:
1252                 debug("Control/Bulk\n");
1253                 ss->transport = usb_stor_CB_transport;
1254                 ss->transport_reset = usb_stor_CB_reset;
1255                 break;
1256
1257         case US_PR_CBI:
1258                 debug("Control/Bulk/Interrupt\n");
1259                 ss->transport = usb_stor_CB_transport;
1260                 ss->transport_reset = usb_stor_CB_reset;
1261                 break;
1262         case US_PR_BULK:
1263                 debug("Bulk/Bulk/Bulk\n");
1264                 ss->transport = usb_stor_BBB_transport;
1265                 ss->transport_reset = usb_stor_BBB_reset;
1266                 break;
1267         default:
1268                 printf("USB Storage Transport unknown / not yet implemented\n");
1269                 return 0;
1270                 break;
1271         }
1272
1273         /*
1274          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1275          * An optional interrupt is OK (necessary for CBI protocol).
1276          * We will ignore any others.
1277          */
1278         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1279                 ep_desc = &iface->ep_desc[i];
1280                 /* is it an BULK endpoint? */
1281                 if ((ep_desc->bmAttributes &
1282                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1283                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1284                                 ss->ep_in = ep_desc->bEndpointAddress &
1285                                                 USB_ENDPOINT_NUMBER_MASK;
1286                         else
1287                                 ss->ep_out =
1288                                         ep_desc->bEndpointAddress &
1289                                         USB_ENDPOINT_NUMBER_MASK;
1290                 }
1291
1292                 /* is it an interrupt endpoint? */
1293                 if ((ep_desc->bmAttributes &
1294                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1295                         ss->ep_int = ep_desc->bEndpointAddress &
1296                                                 USB_ENDPOINT_NUMBER_MASK;
1297                         ss->irqinterval = ep_desc->bInterval;
1298                 }
1299         }
1300         debug("Endpoints In %d Out %d Int %d\n",
1301               ss->ep_in, ss->ep_out, ss->ep_int);
1302
1303         /* Do some basic sanity checks, and bail if we find a problem */
1304         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1305             !ss->ep_in || !ss->ep_out ||
1306             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1307                 debug("Problems with device\n");
1308                 return 0;
1309         }
1310         /* set class specific stuff */
1311         /* We only handle certain protocols.  Currently, these are
1312          * the only ones.
1313          * The SFF8070 accepts the requests used in u-boot
1314          */
1315         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1316             ss->subclass != US_SC_8070) {
1317                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1318                 return 0;
1319         }
1320         if (ss->ep_int) {
1321                 /* we had found an interrupt endpoint, prepare irq pipe
1322                  * set up the IRQ pipe and handler
1323                  */
1324                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1325                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1326                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1327                 dev->irq_handle = usb_stor_irq;
1328         }
1329         dev->privptr = (void *)ss;
1330         return 1;
1331 }
1332
1333 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1334                       block_dev_desc_t *dev_desc)
1335 {
1336         unsigned char perq, modi;
1337         ALLOC_CACHE_ALIGN_BUFFER(unsigned long, cap, 2);
1338         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, usb_stor_buf, 36);
1339         unsigned long *capacity, *blksz;
1340         ccb *pccb = &usb_ccb;
1341
1342         pccb->pdata = usb_stor_buf;
1343
1344         dev_desc->target = dev->devnum;
1345         pccb->lun = dev_desc->lun;
1346         debug(" address %d\n", dev_desc->target);
1347
1348         if (usb_inquiry(pccb, ss))
1349                 return -1;
1350
1351         perq = usb_stor_buf[0];
1352         modi = usb_stor_buf[1];
1353
1354         /*
1355          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1356          * they would not respond to test_unit_ready .
1357          */
1358         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1359                 return 0;
1360         }
1361         if ((modi&0x80) == 0x80) {
1362                 /* drive is removable */
1363                 dev_desc->removable = 1;
1364         }
1365         memcpy(&dev_desc->vendor[0], (const void *) &usb_stor_buf[8], 8);
1366         memcpy(&dev_desc->product[0], (const void *) &usb_stor_buf[16], 16);
1367         memcpy(&dev_desc->revision[0], (const void *) &usb_stor_buf[32], 4);
1368         dev_desc->vendor[8] = 0;
1369         dev_desc->product[16] = 0;
1370         dev_desc->revision[4] = 0;
1371 #ifdef CONFIG_USB_BIN_FIXUP
1372         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1373                       (uchar *)dev_desc->product);
1374 #endif /* CONFIG_USB_BIN_FIXUP */
1375         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1376               usb_stor_buf[3]);
1377         if (usb_test_unit_ready(pccb, ss)) {
1378                 printf("Device NOT ready\n"
1379                        "   Request Sense returned %02X %02X %02X\n",
1380                        pccb->sense_buf[2], pccb->sense_buf[12],
1381                        pccb->sense_buf[13]);
1382                 if (dev_desc->removable == 1) {
1383                         dev_desc->type = perq;
1384                         return 1;
1385                 }
1386                 return 0;
1387         }
1388         pccb->pdata = (unsigned char *)&cap[0];
1389         memset(pccb->pdata, 0, 8);
1390         if (usb_read_capacity(pccb, ss) != 0) {
1391                 printf("READ_CAP ERROR\n");
1392                 cap[0] = 2880;
1393                 cap[1] = 0x200;
1394         }
1395         ss->flags &= ~USB_READY;
1396         debug("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0], cap[1]);
1397 #if 0
1398         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1399                 cap[0] >>= 16;
1400 #endif
1401         cap[0] = cpu_to_be32(cap[0]);
1402         cap[1] = cpu_to_be32(cap[1]);
1403
1404         /* this assumes bigendian! */
1405         cap[0] += 1;
1406         capacity = &cap[0];
1407         blksz = &cap[1];
1408         debug("Capacity = 0x%lx, blocksz = 0x%lx\n", *capacity, *blksz);
1409         dev_desc->lba = *capacity;
1410         dev_desc->blksz = *blksz;
1411         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1412         dev_desc->type = perq;
1413         debug(" address %d\n", dev_desc->target);
1414         debug("partype: %d\n", dev_desc->part_type);
1415
1416         init_part(dev_desc);
1417
1418         debug("partype: %d\n", dev_desc->part_type);
1419         return 1;
1420 }