Merge branch 'mpc86xx'
[platform/kernel/u-boot.git] / 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 <gj@denx.de>
15  *
16  * BBB support based on /sys/dev/usb/umass.c from
17  * FreeBSD.
18  *
19  * See file CREDITS for list of people who contributed to this
20  * project.
21  *
22  * This program is free software; you can redistribute it and/or
23  * modify it under the terms of the GNU General Public License as
24  * published by the Free Software Foundation; either version 2 of
25  * the License, or (at your option) any later version.
26  *
27  * This program is distributed in the hope that it will be useful,
28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
30  * GNU General Public License for more details.
31  *
32  * You should have received a copy of the GNU General Public License
33  * along with this program; if not, write to the Free Software
34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
35  * MA 02111-1307 USA
36  *
37  */
38
39 /* Note:
40  * Currently only the CBI transport protocoll has been implemented, and it
41  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
42  * transport protocoll may work as well.
43  */
44 /*
45  * New Note:
46  * Support for USB Mass Storage Devices (BBB) has been added. It has
47  * only been tested with USB memory sticks.
48  * Nota bene: if you are using the BBB support with a little-endian
49  * CPU then you MUST define LITTLEENDIAN in the configuration file!
50  */
51
52
53 #include <common.h>
54 #include <command.h>
55 #include <asm/processor.h>
56
57
58 #if (CONFIG_COMMANDS & CFG_CMD_USB)
59 #include <usb.h>
60
61 #ifdef CONFIG_USB_STORAGE
62
63 #undef USB_STOR_DEBUG
64 #undef BBB_COMDAT_TRACE
65 #undef BBB_XPORT_TRACE
66
67 #ifdef  USB_STOR_DEBUG
68 #define USB_STOR_PRINTF(fmt,args...)    printf (fmt ,##args)
69 #else
70 #define USB_STOR_PRINTF(fmt,args...)
71 #endif
72
73 #include <scsi.h>
74 /* direction table -- this indicates the direction of the data
75  * transfer for each command code -- a 1 indicates input
76  */
77 unsigned char us_direction[256/8] = {
78         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
79         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
80         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
81         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
82 };
83 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
84
85 static unsigned char usb_stor_buf[512];
86 static ccb usb_ccb;
87
88 /*
89  * CBI style
90  */
91
92 #define US_CBI_ADSC             0
93
94 /*
95  * BULK only
96  */
97 #define US_BBB_RESET            0xff
98 #define US_BBB_GET_MAX_LUN      0xfe
99
100 /* Command Block Wrapper */
101 typedef struct {
102         __u32           dCBWSignature;
103 #       define CBWSIGNATURE     0x43425355
104         __u32           dCBWTag;
105         __u32           dCBWDataTransferLength;
106         __u8            bCBWFlags;
107 #       define CBWFLAGS_OUT     0x00
108 #       define CBWFLAGS_IN      0x80
109         __u8            bCBWLUN;
110         __u8            bCDBLength;
111 #       define CBWCDBLENGTH     16
112         __u8            CBWCDB[CBWCDBLENGTH];
113 } umass_bbb_cbw_t;
114 #define UMASS_BBB_CBW_SIZE      31
115 static __u32 CBWTag = 0;
116
117 /* Command Status Wrapper */
118 typedef struct {
119         __u32           dCSWSignature;
120 #       define CSWSIGNATURE     0x53425355
121         __u32           dCSWTag;
122         __u32           dCSWDataResidue;
123         __u8            bCSWStatus;
124 #       define CSWSTATUS_GOOD   0x0
125 #       define CSWSTATUS_FAILED 0x1
126 #       define CSWSTATUS_PHASE  0x2
127 } umass_bbb_csw_t;
128 #define UMASS_BBB_CSW_SIZE      13
129
130 #define USB_MAX_STOR_DEV 5
131 static int usb_max_devs = 0; /* number of highest available usb device */
132
133 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
134
135 struct us_data;
136 typedef int (*trans_cmnd)(ccb*, struct us_data*);
137 typedef int (*trans_reset)(struct us_data*);
138
139 struct us_data {
140         struct usb_device       *pusb_dev;       /* this usb_device */
141         unsigned int            flags;           /* from filter initially */
142         unsigned char           ifnum;           /* interface number */
143         unsigned char           ep_in;           /* in endpoint */
144         unsigned char           ep_out;          /* out ....... */
145         unsigned char           ep_int;          /* interrupt . */
146         unsigned char           subclass;        /* as in overview */
147         unsigned char           protocol;        /* .............. */
148         unsigned char           attention_done;  /* force attn on first cmd */
149         unsigned short  ip_data;         /* interrupt data */
150         int                                                     action;          /* what to do */
151         int                                                     ip_wanted; /* needed */
152         int                                                     *irq_handle;     /* for USB int requests */
153         unsigned int            irqpipe;         /* pipe for release_irq */
154         unsigned char           irqmaxp;        /* max packed for irq Pipe */
155         unsigned char   irqinterval; /* Intervall for IRQ Pipe */
156         ccb                                                     *srb;            /* current srb */
157         trans_reset                     transport_reset; /* reset routine */
158         trans_cmnd                      transport; /* transport routine */
159 };
160
161 static struct us_data usb_stor[USB_MAX_STOR_DEV];
162
163
164 #define USB_STOR_TRANSPORT_GOOD    0
165 #define USB_STOR_TRANSPORT_FAILED -1
166 #define USB_STOR_TRANSPORT_ERROR  -2
167
168
169 int usb_stor_get_info(struct usb_device *dev, struct us_data *us, block_dev_desc_t *dev_desc);
170 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,struct us_data *ss);
171 unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer);
172 struct usb_device * usb_get_dev_index(int index);
173 void uhci_show_temp_int_td(void);
174
175 block_dev_desc_t *usb_stor_get_dev(int index)
176 {
177         return &usb_dev_desc[index];
178 }
179
180
181 void usb_show_progress(void)
182 {
183         printf(".");
184 }
185
186 /*********************************************************************************
187  * show info on storage devices; 'usb start/init' must be invoked earlier
188  * as we only retrieve structures populated during devices initialization
189  */
190 void usb_stor_info(void)
191 {
192         int i;
193
194         if (usb_max_devs > 0)
195                 for (i = 0; i < usb_max_devs; i++) {
196                         printf ("  Device %d: ", i);
197                         dev_print(&usb_dev_desc[i]);
198                 }
199         else
200                 printf("No storage devices, perhaps not 'usb start'ed..?\n");
201 }
202
203 /*********************************************************************************
204  * scan the usb and reports device info
205  * to the user if mode = 1
206  * returns current device or -1 if no
207  */
208 int usb_stor_scan(int mode)
209 {
210         unsigned char i;
211         struct usb_device *dev;
212
213         /* GJ */
214         memset(usb_stor_buf, 0, sizeof(usb_stor_buf));
215
216         if(mode==1) {
217                 printf("       scanning bus for storage devices... ");
218         }
219         usb_disable_asynch(1); /* asynch transfer not allowed */
220
221         for(i=0;i<USB_MAX_STOR_DEV;i++) {
222                 memset(&usb_dev_desc[i],0,sizeof(block_dev_desc_t));
223                 usb_dev_desc[i].target=0xff;
224                 usb_dev_desc[i].if_type=IF_TYPE_USB;
225                 usb_dev_desc[i].dev=i;
226                 usb_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
227                 usb_dev_desc[i].block_read=usb_stor_read;
228         }
229
230         usb_max_devs=0;
231         for(i=0;i<USB_MAX_DEVICE;i++) {
232                 dev=usb_get_dev_index(i); /* get device */
233                 USB_STOR_PRINTF("i=%d\n",i);
234                 if(dev==NULL) {
235                         break; /* no more devices avaiable */
236                 }
237                 if(usb_storage_probe(dev,0,&usb_stor[usb_max_devs])) { /* ok, it is a storage devices */
238                         /* get info and fill it in */
239                         if(usb_stor_get_info(dev, &usb_stor[usb_max_devs], &usb_dev_desc[usb_max_devs]))
240                                 usb_max_devs++;
241                 } /* if storage device */
242                 if(usb_max_devs==USB_MAX_STOR_DEV) {
243                         printf("max USB Storage Device reached: %d stopping\n",usb_max_devs);
244                         break;
245                 }
246         } /* for */
247
248         usb_disable_asynch(0); /* asynch transfer allowed */
249         printf("%d Storage Device(s) found\n", usb_max_devs);
250         if(usb_max_devs>0)
251                 return 0;
252         else
253                 return-1;
254 }
255
256 static int usb_stor_irq(struct usb_device *dev)
257 {
258         struct us_data *us;
259         us=(struct us_data *)dev->privptr;
260
261         if(us->ip_wanted) {
262                 us->ip_wanted=0;
263         }
264         return 0;
265 }
266
267
268 #ifdef  USB_STOR_DEBUG
269
270 static void usb_show_srb(ccb * pccb)
271 {
272         int i;
273         printf("SRB: len %d datalen 0x%lX\n ",pccb->cmdlen,pccb->datalen);
274         for(i=0;i<12;i++) {
275                 printf("%02X ",pccb->cmd[i]);
276         }
277         printf("\n");
278 }
279
280 static void display_int_status(unsigned long tmp)
281 {
282         printf("Status: %s %s %s %s %s %s %s\n",
283                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
284                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
285                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
286                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
287                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
288                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
289                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
290 }
291 #endif
292 /***********************************************************************
293  * Data transfer routines
294  ***********************************************************************/
295
296 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
297 {
298         int max_size;
299         int this_xfer;
300         int result;
301         int partial;
302         int maxtry;
303         int stat;
304
305         /* determine the maximum packet size for these transfers */
306         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
307
308         /* while we have data left to transfer */
309         while (length) {
310
311                 /* calculate how long this will be -- maximum or a remainder */
312                 this_xfer = length > max_size ? max_size : length;
313                 length -= this_xfer;
314
315                 /* setup the retry counter */
316                 maxtry = 10;
317
318                 /* set up the transfer loop */
319                 do {
320                         /* transfer the data */
321                         USB_STOR_PRINTF("Bulk xfer 0x%x(%d) try #%d\n",
322                                   (unsigned int)buf, this_xfer, 11 - maxtry);
323                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
324                                               this_xfer, &partial, USB_CNTL_TIMEOUT*5);
325                         USB_STOR_PRINTF("bulk_msg returned %d xferred %d/%d\n",
326                                   result, partial, this_xfer);
327                         if(us->pusb_dev->status!=0) {
328                                 /* if we stall, we need to clear it before we go on */
329 #ifdef USB_STOR_DEBUG
330                                 display_int_status(us->pusb_dev->status);
331 #endif
332                                 if (us->pusb_dev->status & USB_ST_STALLED) {
333                                         USB_STOR_PRINTF("stalled ->clearing endpoint halt for pipe 0x%x\n", pipe);
334                                         stat = us->pusb_dev->status;
335                                         usb_clear_halt(us->pusb_dev, pipe);
336                                         us->pusb_dev->status=stat;
337                                         if(this_xfer == partial) {
338                                                 USB_STOR_PRINTF("bulk transferred with error %X, but data ok\n",us->pusb_dev->status);
339                                                 return 0;
340                                         }
341                                         else
342                                                 return result;
343                                 }
344                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
345                                         USB_STOR_PRINTF("Device NAKed bulk_msg\n");
346                                         return result;
347                                 }
348                                 if(this_xfer == partial) {
349                                         USB_STOR_PRINTF("bulk transferred with error %d, but data ok\n",us->pusb_dev->status);
350                                         return 0;
351                                 }
352                                 /* if our try counter reaches 0, bail out */
353                                 USB_STOR_PRINTF("bulk transferred with error %d, data %d\n",us->pusb_dev->status,partial);
354                                 if (!maxtry--)
355                                                 return result;
356                         }
357                         /* update to show what data was transferred */
358                         this_xfer -= partial;
359                         buf += partial;
360                         /* continue until this transfer is done */
361                 } while ( this_xfer );
362         }
363
364         /* if we get here, we're done and successful */
365         return 0;
366 }
367
368 static int usb_stor_BBB_reset(struct us_data *us)
369 {
370         int result;
371         unsigned int pipe;
372
373         /*
374          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
375          *
376          * For Reset Recovery the host shall issue in the following order:
377          * a) a Bulk-Only Mass Storage Reset
378          * b) a Clear Feature HALT to the Bulk-In endpoint
379          * c) a Clear Feature HALT to the Bulk-Out endpoint
380          *
381          * This is done in 3 steps.
382          *
383          * If the reset doesn't succeed, the device should be port reset.
384          *
385          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
386          */
387         USB_STOR_PRINTF("BBB_reset\n");
388         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
389                                  US_BBB_RESET, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
390                                  0, us->ifnum, 0, 0, USB_CNTL_TIMEOUT*5);
391
392         if((result < 0) && (us->pusb_dev->status & USB_ST_STALLED))
393         {
394                 USB_STOR_PRINTF("RESET:stall\n");
395                 return -1;
396         }
397
398         /* long wait for reset */
399         wait_ms(150);
400         USB_STOR_PRINTF("BBB_reset result %d: status %X reset\n",result,us->pusb_dev->status);
401         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
402         result = usb_clear_halt(us->pusb_dev, pipe);
403         /* long wait for reset */
404         wait_ms(150);
405         USB_STOR_PRINTF("BBB_reset result %d: status %X clearing IN endpoint\n",result,us->pusb_dev->status);
406         /* long wait for reset */
407         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
408         result = usb_clear_halt(us->pusb_dev, pipe);
409         wait_ms(150);
410         USB_STOR_PRINTF("BBB_reset result %d: status %X clearing OUT endpoint\n",result,us->pusb_dev->status);
411         USB_STOR_PRINTF("BBB_reset done\n");
412         return 0;
413 }
414
415 /* FIXME: this reset function doesn't really reset the port, and it
416  * should. Actually it should probably do what it's doing here, and
417  * reset the port physically
418  */
419 static int usb_stor_CB_reset(struct us_data *us)
420 {
421         unsigned char cmd[12];
422         int result;
423
424         USB_STOR_PRINTF("CB_reset\n");
425         memset(cmd, 0xFF, sizeof(cmd));
426         cmd[0] = SCSI_SEND_DIAG;
427         cmd[1] = 4;
428         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
429                                  US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
430                                  0, us->ifnum, cmd, sizeof(cmd), USB_CNTL_TIMEOUT*5);
431
432         /* long wait for reset */
433         wait_ms(1500);
434         USB_STOR_PRINTF("CB_reset result %d: status %X clearing endpoint halt\n",result,us->pusb_dev->status);
435         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
436         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
437
438         USB_STOR_PRINTF("CB_reset done\n");
439         return 0;
440 }
441
442 /*
443  * Set up the command for a BBB device. Note that the actual SCSI
444  * command is copied into cbw.CBWCDB.
445  */
446 int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
447 {
448         int result;
449         int actlen;
450         int dir_in;
451         unsigned int pipe;
452         umass_bbb_cbw_t cbw;
453
454         dir_in = US_DIRECTION(srb->cmd[0]);
455
456 #ifdef BBB_COMDAT_TRACE
457         printf("dir %d lun %d cmdlen %d cmd %p datalen %d pdata %p\n", dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen, srb->pdata);
458         if (srb->cmdlen) {
459                 for(result = 0;result < srb->cmdlen;result++)
460                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
461                 printf("\n");
462         }
463 #endif
464         /* sanity checks */
465         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
466                 USB_STOR_PRINTF("usb_stor_BBB_comdat:cmdlen too large\n");
467                 return -1;
468         }
469
470         /* always OUT to the ep */
471         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
472
473         cbw.dCBWSignature = swap_32(CBWSIGNATURE);
474         cbw.dCBWTag = swap_32(CBWTag++);
475         cbw.dCBWDataTransferLength = swap_32(srb->datalen);
476         cbw.bCBWFlags = (dir_in? CBWFLAGS_IN : CBWFLAGS_OUT);
477         cbw.bCBWLUN = srb->lun;
478         cbw.bCDBLength = srb->cmdlen;
479         /* copy the command data into the CBW command data buffer */
480         /* DST SRC LEN!!! */
481         memcpy(cbw.CBWCDB, srb->cmd, srb->cmdlen);
482         result = usb_bulk_msg(us->pusb_dev, pipe, &cbw, UMASS_BBB_CBW_SIZE, &actlen, USB_CNTL_TIMEOUT*5);
483         if (result < 0)
484                 USB_STOR_PRINTF("usb_stor_BBB_comdat:usb_bulk_msg error\n");
485         return result;
486 }
487
488 /* FIXME: we also need a CBI_command which sets up the completion
489  * interrupt, and waits for it
490  */
491 int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
492 {
493         int result = 0;
494         int dir_in,retry;
495         unsigned int pipe;
496         unsigned long status;
497
498         retry=5;
499                 dir_in=US_DIRECTION(srb->cmd[0]);
500
501                 if(dir_in)
502                         pipe=usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
503                 else
504                         pipe=usb_sndbulkpipe(us->pusb_dev, us->ep_out);
505         while(retry--) {
506                 USB_STOR_PRINTF("CBI gets a command: Try %d\n",5-retry);
507 #ifdef USB_STOR_DEBUG
508                 usb_show_srb(srb);
509 #endif
510                 /* let's send the command via the control pipe */
511                 result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
512                                          US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
513                                          0, us->ifnum,
514                                          srb->cmd, srb->cmdlen, USB_CNTL_TIMEOUT*5);
515                 USB_STOR_PRINTF("CB_transport: control msg returned %d, status %X\n",result,us->pusb_dev->status);
516                 /* check the return code for the command */
517                 if (result < 0) {
518                         if(us->pusb_dev->status & USB_ST_STALLED) {
519                                 status=us->pusb_dev->status;
520                                 USB_STOR_PRINTF(" stall during command found, clear pipe\n");
521                                 usb_clear_halt(us->pusb_dev,  usb_sndctrlpipe(us->pusb_dev,0));
522                                 us->pusb_dev->status=status;
523                         }
524                         USB_STOR_PRINTF(" error during command %02X Stat = %X\n",srb->cmd[0],us->pusb_dev->status);
525                         return result;
526                 }
527                 /* transfer the data payload for this command, if one exists*/
528
529                 USB_STOR_PRINTF("CB_transport: control msg returned %d, direction is %s to go 0x%lx\n",result,dir_in ? "IN" : "OUT",srb->datalen);
530                 if (srb->datalen) {
531                         result = us_one_transfer(us, pipe, (char *)srb->pdata,srb->datalen);
532                         USB_STOR_PRINTF("CBI attempted to transfer data, result is %d status %lX, len %d\n", result,us->pusb_dev->status,us->pusb_dev->act_len);
533                         if(!(us->pusb_dev->status & USB_ST_NAK_REC))
534                                 break;
535                 } /* if (srb->datalen) */
536                 else
537                         break;
538         }
539         /* return result */
540
541         return result;
542 }
543
544
545 int usb_stor_CBI_get_status (ccb * srb, struct us_data *us)
546 {
547         int timeout;
548
549         us->ip_wanted = 1;
550         submit_int_msg (us->pusb_dev, us->irqpipe,
551                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
552         timeout = 1000;
553         while (timeout--) {
554                 if ((volatile int *) us->ip_wanted == 0)
555                         break;
556                 wait_ms (10);
557         }
558         if (us->ip_wanted) {
559                 printf ("       Did not get interrupt on CBI\n");
560                 us->ip_wanted = 0;
561                 return USB_STOR_TRANSPORT_ERROR;
562         }
563         USB_STOR_PRINTF
564                 ("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
565                  us->ip_data, us->pusb_dev->irq_act_len,
566                  us->pusb_dev->irq_status);
567         /* UFI gives us ASC and ASCQ, like a request sense */
568         if (us->subclass == US_SC_UFI) {
569                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
570                     srb->cmd[0] == SCSI_INQUIRY)
571                         return USB_STOR_TRANSPORT_GOOD; /* Good */
572                 else if (us->ip_data)
573                         return USB_STOR_TRANSPORT_FAILED;
574                 else
575                         return USB_STOR_TRANSPORT_GOOD;
576         }
577         /* otherwise, we interpret the data normally */
578         switch (us->ip_data) {
579         case 0x0001:
580                 return USB_STOR_TRANSPORT_GOOD;
581         case 0x0002:
582                 return USB_STOR_TRANSPORT_FAILED;
583         default:
584                 return USB_STOR_TRANSPORT_ERROR;
585         }                       /* switch */
586         return USB_STOR_TRANSPORT_ERROR;
587 }
588
589 #define USB_TRANSPORT_UNKNOWN_RETRY 5
590 #define USB_TRANSPORT_NOT_READY_RETRY 10
591
592 /* clear a stall on an endpoint - special for BBB devices */
593 int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
594 {
595         int result;
596
597         /* ENDPOINT_HALT = 0, so set value to 0 */
598         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
599                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
600                                 0, endpt, 0, 0, USB_CNTL_TIMEOUT*5);
601         return result;
602 }
603
604 int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
605 {
606         int result, retry;
607         int dir_in;
608         int actlen, data_actlen;
609         unsigned int pipe, pipein, pipeout;
610         umass_bbb_csw_t csw;
611 #ifdef BBB_XPORT_TRACE
612         unsigned char *ptr;
613         int index;
614 #endif
615
616         dir_in = US_DIRECTION(srb->cmd[0]);
617
618         /* COMMAND phase */
619         USB_STOR_PRINTF("COMMAND phase\n");
620         result = usb_stor_BBB_comdat(srb, us);
621         if (result < 0) {
622                 USB_STOR_PRINTF("failed to send CBW status %ld\n",
623                         us->pusb_dev->status);
624                 usb_stor_BBB_reset(us);
625                 return USB_STOR_TRANSPORT_FAILED;
626         }
627         wait_ms(5);
628         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
629         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
630         /* DATA phase + error handling */
631         data_actlen = 0;
632         /* no data, go immediately to the STATUS phase */
633         if (srb->datalen == 0)
634                 goto st;
635         USB_STOR_PRINTF("DATA phase\n");
636         if (dir_in)
637                 pipe = pipein;
638         else
639                 pipe = pipeout;
640         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen, &data_actlen, USB_CNTL_TIMEOUT*5);
641         /* special handling of STALL in DATA phase */
642         if((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
643                 USB_STOR_PRINTF("DATA:stall\n");
644                 /* clear the STALL on the endpoint */
645                 result = usb_stor_BBB_clear_endpt_stall(us, dir_in? us->ep_in : us->ep_out);
646                 if (result >= 0)
647                         /* continue on to STATUS phase */
648                         goto st;
649         }
650         if (result < 0) {
651                 USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
652                         us->pusb_dev->status);
653                 usb_stor_BBB_reset(us);
654                 return USB_STOR_TRANSPORT_FAILED;
655         }
656 #ifdef BBB_XPORT_TRACE
657         for (index = 0; index < data_actlen; index++)
658                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
659         printf("\n");
660 #endif
661         /* STATUS phase + error handling */
662    st:
663         retry = 0;
664    again:
665         USB_STOR_PRINTF("STATUS phase\n");
666         result = usb_bulk_msg(us->pusb_dev, pipein, &csw, UMASS_BBB_CSW_SIZE,
667                                 &actlen, USB_CNTL_TIMEOUT*5);
668
669         /* special handling of STALL in STATUS phase */
670         if((result < 0) && (retry < 1) && (us->pusb_dev->status & USB_ST_STALLED)) {
671                 USB_STOR_PRINTF("STATUS:stall\n");
672                 /* clear the STALL on the endpoint */
673                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
674                 if (result >= 0 && (retry++ < 1))
675                         /* do a retry */
676                         goto again;
677         }
678         if (result < 0) {
679                 USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
680                         us->pusb_dev->status);
681                 usb_stor_BBB_reset(us);
682                 return USB_STOR_TRANSPORT_FAILED;
683         }
684 #ifdef BBB_XPORT_TRACE
685         ptr = (unsigned char *)&csw;
686         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
687                 printf("ptr[%d] %#x ", index, ptr[index]);
688         printf("\n");
689 #endif
690         /* misuse pipe to get the residue */
691         pipe = swap_32(csw.dCSWDataResidue);
692         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
693                 pipe = srb->datalen - data_actlen;
694         if (CSWSIGNATURE != swap_32(csw.dCSWSignature)) {
695                 USB_STOR_PRINTF("!CSWSIGNATURE\n");
696                 usb_stor_BBB_reset(us);
697                 return USB_STOR_TRANSPORT_FAILED;
698         } else if ((CBWTag - 1) != swap_32(csw.dCSWTag)) {
699                 USB_STOR_PRINTF("!Tag\n");
700                 usb_stor_BBB_reset(us);
701                 return USB_STOR_TRANSPORT_FAILED;
702         } else if (csw.bCSWStatus > CSWSTATUS_PHASE) {
703                 USB_STOR_PRINTF(">PHASE\n");
704                 usb_stor_BBB_reset(us);
705                 return USB_STOR_TRANSPORT_FAILED;
706         } else if (csw.bCSWStatus == CSWSTATUS_PHASE) {
707                 USB_STOR_PRINTF("=PHASE\n");
708                 usb_stor_BBB_reset(us);
709                 return USB_STOR_TRANSPORT_FAILED;
710         } else if (data_actlen > srb->datalen) {
711                 USB_STOR_PRINTF("transferred %dB instead of %dB\n",
712                         data_actlen, srb->datalen);
713                 return USB_STOR_TRANSPORT_FAILED;
714         } else if (csw.bCSWStatus == CSWSTATUS_FAILED) {
715                 USB_STOR_PRINTF("FAILED\n");
716                 return USB_STOR_TRANSPORT_FAILED;
717         }
718
719         return result;
720 }
721
722 int usb_stor_CB_transport(ccb *srb, struct us_data *us)
723 {
724         int result,status;
725         ccb *psrb;
726         ccb reqsrb;
727         int retry,notready;
728
729         psrb=&reqsrb;
730         status=USB_STOR_TRANSPORT_GOOD;
731         retry=0;
732         notready=0;
733         /* issue the command */
734 do_retry:
735         result=usb_stor_CB_comdat(srb,us);
736         USB_STOR_PRINTF("command / Data returned %d, status %X\n",result,us->pusb_dev->status);
737         /* if this is an CBI Protocol, get IRQ */
738         if(us->protocol==US_PR_CBI) {
739                 status=usb_stor_CBI_get_status(srb,us);
740                 /* if the status is error, report it */
741                 if(status==USB_STOR_TRANSPORT_ERROR) {
742                         USB_STOR_PRINTF(" USB CBI Command Error\n");
743                         return status;
744                 }
745                 srb->sense_buf[12]=(unsigned char)(us->ip_data>>8);
746                 srb->sense_buf[13]=(unsigned char)(us->ip_data&0xff);
747                 if(!us->ip_data) {
748                 /* if the status is good, report it */
749                         if(status==USB_STOR_TRANSPORT_GOOD) {
750                                 USB_STOR_PRINTF(" USB CBI Command Good\n");
751                                 return status;
752                         }
753                 }
754         }
755         /* do we have to issue an auto request? */
756         /* HERE we have to check the result */
757         if((result<0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
758                 USB_STOR_PRINTF("ERROR %X\n",us->pusb_dev->status);
759                 us->transport_reset(us);
760                 return USB_STOR_TRANSPORT_ERROR;
761         }
762         if((us->protocol==US_PR_CBI) &&
763                         ((srb->cmd[0]==SCSI_REQ_SENSE) ||
764                         (srb->cmd[0]==SCSI_INQUIRY))) { /* do not issue an autorequest after request sense */
765                 USB_STOR_PRINTF("No auto request and good\n");
766                 return USB_STOR_TRANSPORT_GOOD;
767         }
768         /* issue an request_sense */
769         memset(&psrb->cmd[0],0,12);
770         psrb->cmd[0]=SCSI_REQ_SENSE;
771         psrb->cmd[1]=srb->lun<<5;
772         psrb->cmd[4]=18;
773         psrb->datalen=18;
774         psrb->pdata=&srb->sense_buf[0];
775         psrb->cmdlen=12;
776         /* issue the command */
777         result=usb_stor_CB_comdat(psrb,us);
778         USB_STOR_PRINTF("auto request returned %d\n",result);
779         /* if this is an CBI Protocol, get IRQ */
780         if(us->protocol==US_PR_CBI) {
781                 status=usb_stor_CBI_get_status(psrb,us);
782         }
783         if((result<0)&&!(us->pusb_dev->status & USB_ST_STALLED)) {
784                 USB_STOR_PRINTF(" AUTO REQUEST ERROR %d\n",us->pusb_dev->status);
785                 return USB_STOR_TRANSPORT_ERROR;
786         }
787         USB_STOR_PRINTF("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",srb->sense_buf[0],srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
788         /* Check the auto request result */
789         if((srb->sense_buf[2]==0) &&
790                  (srb->sense_buf[12]==0) &&
791                  (srb->sense_buf[13]==0)) /* ok, no sense */
792                 return USB_STOR_TRANSPORT_GOOD;
793         /* Check the auto request result */
794         switch(srb->sense_buf[2]) {
795         case 0x01: /* Recovered Error */
796                 return USB_STOR_TRANSPORT_GOOD;
797                 break;
798         case 0x02: /* Not Ready */
799                 if(notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
800                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X 0x%02X (NOT READY)\n",
801                                 srb->cmd[0],srb->sense_buf[0],srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
802                         return USB_STOR_TRANSPORT_FAILED;
803                 } else {
804                         wait_ms(100);
805                         goto do_retry;
806                 }
807                 break;
808         default:
809                 if(retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
810                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
811                                 srb->cmd[0],srb->sense_buf[0],srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
812                         return USB_STOR_TRANSPORT_FAILED;
813                 } else {
814                         goto do_retry;
815                 }
816                 break;
817         }
818         return USB_STOR_TRANSPORT_FAILED;
819 }
820
821
822 static int usb_inquiry(ccb *srb,struct us_data *ss)
823 {
824         int retry,i;
825         retry=5;
826         do {
827                 memset(&srb->cmd[0],0,12);
828                 srb->cmd[0]=SCSI_INQUIRY;
829                 srb->cmd[1]=srb->lun<<5;
830                 srb->cmd[4]=36;
831                 srb->datalen=36;
832                 srb->cmdlen=12;
833                 i=ss->transport(srb,ss);
834                 USB_STOR_PRINTF("inquiry returns %d\n",i);
835                 if(i==0)
836                         break;
837         } while(retry--);
838
839         if(!retry) {
840                 printf("error in inquiry\n");
841                 return -1;
842         }
843         return 0;
844 }
845
846 static int usb_request_sense(ccb *srb,struct us_data *ss)
847 {
848         char *ptr;
849
850         ptr=(char *)srb->pdata;
851         memset(&srb->cmd[0],0,12);
852         srb->cmd[0]=SCSI_REQ_SENSE;
853         srb->cmd[1]=srb->lun<<5;
854         srb->cmd[4]=18;
855         srb->datalen=18;
856         srb->pdata=&srb->sense_buf[0];
857         srb->cmdlen=12;
858         ss->transport(srb,ss);
859         USB_STOR_PRINTF("Request Sense returned %02X %02X %02X\n",srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
860         srb->pdata=(uchar *)ptr;
861         return 0;
862 }
863
864 static int usb_test_unit_ready(ccb *srb,struct us_data *ss)
865 {
866         int retries = 10;
867
868         do {
869                 memset(&srb->cmd[0],0,12);
870                 srb->cmd[0]=SCSI_TST_U_RDY;
871                 srb->cmd[1]=srb->lun<<5;
872                 srb->datalen=0;
873                 srb->cmdlen=12;
874                 if(ss->transport(srb,ss)==USB_STOR_TRANSPORT_GOOD) {
875                         return 0;
876                 }
877                 usb_request_sense (srb, ss);
878                 wait_ms (100);
879         } while(retries--);
880
881         return -1;
882 }
883
884 static int usb_read_capacity(ccb *srb,struct us_data *ss)
885 {
886         int retry;
887         retry = 3; /* retries */
888         do {
889                 memset(&srb->cmd[0],0,12);
890                 srb->cmd[0]=SCSI_RD_CAPAC;
891                 srb->cmd[1]=srb->lun<<5;
892                 srb->datalen=8;
893                 srb->cmdlen=12;
894                 if(ss->transport(srb,ss)==USB_STOR_TRANSPORT_GOOD) {
895                         return 0;
896                 }
897         } while(retry--);
898
899         return -1;
900 }
901
902 static int usb_read_10(ccb *srb,struct us_data *ss, unsigned long start, unsigned short blocks)
903 {
904         memset(&srb->cmd[0],0,12);
905         srb->cmd[0]=SCSI_READ10;
906         srb->cmd[1]=srb->lun<<5;
907         srb->cmd[2]=((unsigned char) (start>>24))&0xff;
908         srb->cmd[3]=((unsigned char) (start>>16))&0xff;
909         srb->cmd[4]=((unsigned char) (start>>8))&0xff;
910         srb->cmd[5]=((unsigned char) (start))&0xff;
911         srb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
912         srb->cmd[8]=(unsigned char) blocks & 0xff;
913         srb->cmdlen=12;
914         USB_STOR_PRINTF("read10: start %lx blocks %x\n",start,blocks);
915         return ss->transport(srb,ss);
916 }
917
918
919 #define USB_MAX_READ_BLK 20
920
921 unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer)
922 {
923         unsigned long start,blks, buf_addr;
924         unsigned short smallblks;
925         struct usb_device *dev;
926         int retry,i;
927         ccb *srb = &usb_ccb;
928
929         if (blkcnt == 0)
930                 return 0;
931
932         device &= 0xff;
933         /* Setup  device
934          */
935         USB_STOR_PRINTF("\nusb_read: dev %d \n",device);
936         dev=NULL;
937         for(i=0;i<USB_MAX_DEVICE;i++) {
938                 dev=usb_get_dev_index(i);
939                 if(dev==NULL) {
940                         return 0;
941                 }
942                 if(dev->devnum==usb_dev_desc[device].target)
943                         break;
944         }
945
946         usb_disable_asynch(1); /* asynch transfer not allowed */
947         srb->lun=usb_dev_desc[device].lun;
948         buf_addr=(unsigned long)buffer;
949         start=blknr;
950         blks=blkcnt;
951         if(usb_test_unit_ready(srb,(struct us_data *)dev->privptr)) {
952                 printf("Device NOT ready\n   Request Sense returned %02X %02X %02X\n",
953                         srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
954                 return 0;
955         }
956         USB_STOR_PRINTF("\nusb_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks, buf_addr);
957         do {
958                 retry=2;
959                 srb->pdata=(unsigned char *)buf_addr;
960                 if(blks>USB_MAX_READ_BLK) {
961                         smallblks=USB_MAX_READ_BLK;
962                 } else {
963                         smallblks=(unsigned short) blks;
964                 }
965 retry_it:
966                 if(smallblks==USB_MAX_READ_BLK)
967                         usb_show_progress();
968                 srb->datalen=usb_dev_desc[device].blksz * smallblks;
969                 srb->pdata=(unsigned char *)buf_addr;
970                 if(usb_read_10(srb,(struct us_data *)dev->privptr, start, smallblks)) {
971                         USB_STOR_PRINTF("Read ERROR\n");
972                         usb_request_sense(srb,(struct us_data *)dev->privptr);
973                         if(retry--)
974                                 goto retry_it;
975                         blkcnt-=blks;
976                         break;
977                 }
978                 start+=smallblks;
979                 blks-=smallblks;
980                 buf_addr+=srb->datalen;
981         } while(blks!=0);
982         USB_STOR_PRINTF("usb_read: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
983         usb_disable_asynch(0); /* asynch transfer allowed */
984         if(blkcnt>=USB_MAX_READ_BLK)
985                 printf("\n");
986         return(blkcnt);
987 }
988
989
990 /* Probe to see if a new device is actually a Storage device */
991 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,struct us_data *ss)
992 {
993         struct usb_interface_descriptor *iface;
994         int i;
995         unsigned int flags = 0;
996
997         int protocol = 0;
998         int subclass = 0;
999
1000         /* let's examine the device now */
1001         iface = &dev->config.if_desc[ifnum];
1002
1003 #if 0
1004         /* this is the place to patch some storage devices */
1005         USB_STOR_PRINTF("iVendor %X iProduct %X\n",dev->descriptor.idVendor,dev->descriptor.idProduct);
1006         if ((dev->descriptor.idVendor) == 0x066b && (dev->descriptor.idProduct) == 0x0103) {
1007                 USB_STOR_PRINTF("patched for E-USB\n");
1008                 protocol = US_PR_CB;
1009                 subclass = US_SC_UFI;       /* an assumption */
1010         }
1011 #endif
1012
1013         if (dev->descriptor.bDeviceClass != 0 ||
1014                         iface->bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1015                         iface->bInterfaceSubClass < US_SC_MIN ||
1016                         iface->bInterfaceSubClass > US_SC_MAX) {
1017                 /* if it's not a mass storage, we go no further */
1018                 return 0;
1019         }
1020
1021         memset(ss, 0, sizeof(struct us_data));
1022
1023         /* At this point, we know we've got a live one */
1024         USB_STOR_PRINTF("\n\nUSB Mass Storage device detected\n");
1025
1026         /* Initialize the us_data structure with some useful info */
1027         ss->flags = flags;
1028         ss->ifnum = ifnum;
1029         ss->pusb_dev = dev;
1030         ss->attention_done = 0;
1031
1032         /* If the device has subclass and protocol, then use that.  Otherwise,
1033          * take data from the specific interface.
1034          */
1035         if (subclass) {
1036                 ss->subclass = subclass;
1037                 ss->protocol = protocol;
1038         } else {
1039                 ss->subclass = iface->bInterfaceSubClass;
1040                 ss->protocol = iface->bInterfaceProtocol;
1041         }
1042
1043         /* set the handler pointers based on the protocol */
1044         USB_STOR_PRINTF("Transport: ");
1045         switch (ss->protocol) {
1046         case US_PR_CB:
1047                 USB_STOR_PRINTF("Control/Bulk\n");
1048                 ss->transport = usb_stor_CB_transport;
1049                 ss->transport_reset = usb_stor_CB_reset;
1050                 break;
1051
1052         case US_PR_CBI:
1053                 USB_STOR_PRINTF("Control/Bulk/Interrupt\n");
1054                 ss->transport = usb_stor_CB_transport;
1055                 ss->transport_reset = usb_stor_CB_reset;
1056                 break;
1057         case US_PR_BULK:
1058                 USB_STOR_PRINTF("Bulk/Bulk/Bulk\n");
1059                 ss->transport = usb_stor_BBB_transport;
1060                 ss->transport_reset = usb_stor_BBB_reset;
1061                 break;
1062         default:
1063                 printf("USB Storage Transport unknown / not yet implemented\n");
1064                 return 0;
1065                 break;
1066         }
1067
1068         /*
1069          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1070          * An optional interrupt is OK (necessary for CBI protocol).
1071          * We will ignore any others.
1072          */
1073         for (i = 0; i < iface->bNumEndpoints; i++) {
1074                 /* is it an BULK endpoint? */
1075                 if ((iface->ep_desc[i].bmAttributes &  USB_ENDPOINT_XFERTYPE_MASK)
1076                     == USB_ENDPOINT_XFER_BULK) {
1077                         if (iface->ep_desc[i].bEndpointAddress & USB_DIR_IN)
1078                                 ss->ep_in = iface->ep_desc[i].bEndpointAddress &
1079                                         USB_ENDPOINT_NUMBER_MASK;
1080                         else
1081                                 ss->ep_out = iface->ep_desc[i].bEndpointAddress &
1082                                         USB_ENDPOINT_NUMBER_MASK;
1083                 }
1084
1085                 /* is it an interrupt endpoint? */
1086                 if ((iface->ep_desc[i].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1087                     == USB_ENDPOINT_XFER_INT) {
1088                         ss->ep_int = iface->ep_desc[i].bEndpointAddress &
1089                                 USB_ENDPOINT_NUMBER_MASK;
1090                         ss->irqinterval = iface->ep_desc[i].bInterval;
1091                 }
1092         }
1093         USB_STOR_PRINTF("Endpoints In %d Out %d Int %d\n",
1094                   ss->ep_in, ss->ep_out, ss->ep_int);
1095
1096         /* Do some basic sanity checks, and bail if we find a problem */
1097         if (usb_set_interface(dev, iface->bInterfaceNumber, 0) ||
1098             !ss->ep_in || !ss->ep_out ||
1099             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1100                 USB_STOR_PRINTF("Problems with device\n");
1101                 return 0;
1102         }
1103         /* set class specific stuff */
1104         /* We only handle certain protocols.  Currently, these are
1105          * the only ones.
1106          * The SFF8070 accepts the requests used in u-boot
1107          */
1108         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1109             ss->subclass != US_SC_8070) {
1110                 printf("Sorry, protocol %d not yet supported.\n",ss->subclass);
1111                 return 0;
1112         }
1113         if(ss->ep_int) { /* we had found an interrupt endpoint, prepare irq pipe */
1114                 /* set up the IRQ pipe and handler */
1115
1116                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1117                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1118                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1119                 dev->irq_handle=usb_stor_irq;
1120         }
1121         dev->privptr=(void *)ss;
1122         return 1;
1123 }
1124
1125 int usb_stor_get_info(struct usb_device *dev,struct us_data *ss,block_dev_desc_t *dev_desc)
1126 {
1127         unsigned char perq,modi;
1128         unsigned long cap[2];
1129         unsigned long *capacity,*blksz;
1130         ccb *pccb = &usb_ccb;
1131
1132         /* for some reasons a couple of devices would not survive this reset */
1133         if (
1134             /* Sony USM256E */
1135             (dev->descriptor.idVendor == 0x054c &&
1136              dev->descriptor.idProduct == 0x019e)
1137
1138             ||
1139             /* USB007 Mini-USB2 Flash Drive */
1140             (dev->descriptor.idVendor == 0x066f &&
1141              dev->descriptor.idProduct == 0x2010)
1142             ||
1143             /* SanDisk Corporation Cruzer Micro 20044318410546613953 */
1144             (dev->descriptor.idVendor == 0x0781 &&
1145              dev->descriptor.idProduct == 0x5151)
1146             )
1147                 USB_STOR_PRINTF("usb_stor_get_info: skipping RESET..\n");
1148         else
1149                 ss->transport_reset(ss);
1150
1151         pccb->pdata = usb_stor_buf;
1152
1153         dev_desc->target = dev->devnum;
1154         pccb->lun = dev_desc->lun;
1155         USB_STOR_PRINTF(" address %d\n",dev_desc->target);
1156
1157         if(usb_inquiry(pccb,ss))
1158                 return -1;
1159
1160         perq = usb_stor_buf[0];
1161         modi = usb_stor_buf[1];
1162         if((perq & 0x1f) == 0x1f) {
1163                 return 0; /* skip unknown devices */
1164         }
1165         if((modi&0x80) == 0x80) {/* drive is removable */
1166                 dev_desc->removable = 1;
1167         }
1168         memcpy(&dev_desc->vendor[0], &usb_stor_buf[8], 8);
1169         memcpy(&dev_desc->product[0], &usb_stor_buf[16], 16);
1170         memcpy(&dev_desc->revision[0], &usb_stor_buf[32], 4);
1171         dev_desc->vendor[8] = 0;
1172         dev_desc->product[16] = 0;
1173         dev_desc->revision[4] = 0;
1174         USB_STOR_PRINTF("ISO Vers %X, Response Data %X\n",usb_stor_buf[2],usb_stor_buf[3]);
1175         if(usb_test_unit_ready(pccb,ss)) {
1176                 printf("Device NOT ready\n   Request Sense returned %02X %02X %02X\n",pccb->sense_buf[2],pccb->sense_buf[12],pccb->sense_buf[13]);
1177                 if(dev_desc->removable == 1) {
1178                         dev_desc->type = perq;
1179                         return 1;
1180                 }
1181                 else
1182                         return 0;
1183         }
1184         pccb->pdata = (unsigned char *)&cap[0];
1185         memset(pccb->pdata,0,8);
1186         if(usb_read_capacity(pccb,ss) != 0) {
1187                 printf("READ_CAP ERROR\n");
1188                 cap[0] = 2880;
1189                 cap[1] = 0x200;
1190         }
1191         USB_STOR_PRINTF("Read Capacity returns: 0x%lx, 0x%lx\n",cap[0],cap[1]);
1192 #if 0
1193         if(cap[0]>(0x200000 * 10)) /* greater than 10 GByte */
1194                 cap[0]>>=16;
1195 #endif
1196 #ifdef LITTLEENDIAN
1197         cap[0] = ((unsigned long)(
1198                 (((unsigned long)(cap[0]) & (unsigned long)0x000000ffUL) << 24) |
1199                 (((unsigned long)(cap[0]) & (unsigned long)0x0000ff00UL) <<  8) |
1200                 (((unsigned long)(cap[0]) & (unsigned long)0x00ff0000UL) >>  8) |
1201                 (((unsigned long)(cap[0]) & (unsigned long)0xff000000UL) >> 24) ));
1202         cap[1] = ((unsigned long)(
1203                 (((unsigned long)(cap[1]) & (unsigned long)0x000000ffUL) << 24) |
1204                 (((unsigned long)(cap[1]) & (unsigned long)0x0000ff00UL) <<  8) |
1205                 (((unsigned long)(cap[1]) & (unsigned long)0x00ff0000UL) >>  8) |
1206                 (((unsigned long)(cap[1]) & (unsigned long)0xff000000UL) >> 24) ));
1207 #endif
1208         /* this assumes bigendian! */
1209         cap[0] += 1;
1210         capacity = &cap[0];
1211         blksz = &cap[1];
1212         USB_STOR_PRINTF("Capacity = 0x%lx, blocksz = 0x%lx\n",*capacity,*blksz);
1213         dev_desc->lba = *capacity;
1214         dev_desc->blksz = *blksz;
1215         dev_desc->type = perq;
1216         USB_STOR_PRINTF(" address %d\n",dev_desc->target);
1217         USB_STOR_PRINTF("partype: %d\n",dev_desc->part_type);
1218
1219         init_part(dev_desc);
1220
1221         USB_STOR_PRINTF("partype: %d\n",dev_desc->part_type);
1222         return 1;
1223 }
1224
1225 #endif /* CONFIG_USB_STORAGE */
1226 #endif /* CFG_CMD_USB */