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 */