common/usb_storage.c

   1 /*
   2  * Most of this source has been derived from the Linux USB
   3  * project:
   4  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   5  *   (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
   6  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
   7  *   (c) 2000 Yggdrasil Computing, Inc.
   8  *
   9  *
  10  * Adapted for U-Boot:
  11  *   (C) Copyright 2001 Denis Peter, MPL AG Switzerland
  12  *
  13  * For BBB support (C) Copyright 2003
  14  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
  15  *
  16  * BBB support based on /sys/dev/usb/umass.c from
  17  * FreeBSD.
  18  *
  19  * SPDX-License-Identifier:     GPL-2.0+
  20  */
  21
  22 /* Note:
  23  * Currently only the CBI transport protocoll has been implemented, and it
  24  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
  25  * transport protocoll may work as well.
  26  */
  27 /*
  28  * New Note:
  29  * Support for USB Mass Storage Devices (BBB) has been added. It has
  30  * only been tested with USB memory sticks.
  31  */
  32
  33
  34 #include <common.h>
  35 #include <command.h>
  36 #include <inttypes.h>
  37 #include <mapmem.h>
  38 #include <asm/byteorder.h>
  39 #include <asm/processor.h>
  40
  41 #include <part.h>
  42 #include <usb.h>
  43
  44 #undef BBB_COMDAT_TRACE
  45 #undef BBB_XPORT_TRACE
  46
  47 #include <scsi.h>
  48 /* direction table -- this indicates the direction of the data
  49  * transfer for each command code -- a 1 indicates input
  50  */
  51 static const unsigned char us_direction[256/8] = {
  52         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  53         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  54         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  55         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  56 };
  57 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  58
  59 static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
  60 static __u32 CBWTag;
  61
  62 #define USB_MAX_STOR_DEV 5
  63 static int usb_max_devs; /* number of highest available usb device */
  64
  65 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
  66
  67 struct us_data;
  68 typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
  69 typedef int (*trans_reset)(struct us_data *data);
  70
  71 struct us_data {
  72         struct usb_device *pusb_dev;     /* this usb_device */
  73
  74         unsigned int    flags;                  /* from filter initially */
  75 #       define USB_READY        (1 << 0)
  76         unsigned char   ifnum;                  /* interface number */
  77         unsigned char   ep_in;                  /* in endpoint */
  78         unsigned char   ep_out;                 /* out ....... */
  79         unsigned char   ep_int;                 /* interrupt . */
  80         unsigned char   subclass;               /* as in overview */
  81         unsigned char   protocol;               /* .............. */
  82         unsigned char   attention_done;         /* force attn on first cmd */
  83         unsigned short  ip_data;                /* interrupt data */
  84         int             action;                 /* what to do */
  85         int             ip_wanted;              /* needed */
  86         int             *irq_handle;            /* for USB int requests */
  87         unsigned int    irqpipe;                /* pipe for release_irq */
  88         unsigned char   irqmaxp;                /* max packed for irq Pipe */
  89         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
  90         ccb             *srb;                   /* current srb */
  91         trans_reset     transport_reset;        /* reset routine */
  92         trans_cmnd      transport;              /* transport routine */
  93 };
  94
  95 #ifdef CONFIG_USB_EHCI
  96 /*
  97  * The U-Boot EHCI driver can handle any transfer length as long as there is
  98  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
  99  * limited to 65535 blocks.
 100  */
 101 #define USB_MAX_XFER_BLK        65535
 102 #else
 103 #define USB_MAX_XFER_BLK        20
 104 #endif
 105
 106 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 107
 108
 109 #define USB_STOR_TRANSPORT_GOOD    0
 110 #define USB_STOR_TRANSPORT_FAILED -1
 111 #define USB_STOR_TRANSPORT_ERROR  -2
 112
 113 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
 114                       block_dev_desc_t *dev_desc);
 115 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 116                       struct us_data *ss);
 117 unsigned long usb_stor_read(int device, lbaint_t blknr,
 118                             lbaint_t blkcnt, void *buffer);
 119 unsigned long usb_stor_write(int device, lbaint_t blknr,
 120                              lbaint_t blkcnt, const void *buffer);
 121 struct usb_device * usb_get_dev_index(int index);
 122 void uhci_show_temp_int_td(void);
 123
 124 #ifdef CONFIG_PARTITIONS
 125 block_dev_desc_t *usb_stor_get_dev(int index)
 126 {
 127         return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
 128 }
 129 #endif
 130
 131 static void usb_show_progress(void)
 132 {
 133         debug(".");
 134 }
 135
 136 /*******************************************************************************
 137  * show info on storage devices; 'usb start/init' must be invoked earlier
 138  * as we only retrieve structures populated during devices initialization
 139  */
 140 int usb_stor_info(void)
 141 {
 142         int i;
 143
 144         if (usb_max_devs > 0) {
 145                 for (i = 0; i < usb_max_devs; i++) {
 146                         printf("  Device %d: ", i);
 147                         dev_print(&usb_dev_desc[i]);
 148                 }
 149                 return 0;
 150         }
 151
 152         printf("No storage devices, perhaps not 'usb start'ed..?\n");
 153         return 1;
 154 }
 155
 156 static unsigned int usb_get_max_lun(struct us_data *us)
 157 {
 158         int len;
 159         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
 160         len = usb_control_msg(us->pusb_dev,
 161                               usb_rcvctrlpipe(us->pusb_dev, 0),
 162                               US_BBB_GET_MAX_LUN,
 163                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 164                               0, us->ifnum,
 165                               result, sizeof(char),
 166                               USB_CNTL_TIMEOUT * 5);
 167         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
 168         return (len > 0) ? *result : 0;
 169 }
 170
 171 static int usb_storage_register(struct usb_device *dev, unsigned char iface)
 172 {
 173         int lun, max_lun, start = usb_max_devs;
 174         int nb_dev = 0;
 175
 176         if (!usb_storage_probe(dev, iface, &usb_stor[usb_max_devs]))
 177                 return nb_dev;
 178
 179         /*
 180          * OK, it's a storage device.  Iterate over its LUNs
 181          * and populate `usb_dev_desc'.
 182          */
 183         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 184         for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV; lun++) {
 185                 usb_dev_desc[usb_max_devs].lun = lun;
 186                 if (usb_stor_get_info(dev, &usb_stor[start],
 187                     &usb_dev_desc[usb_max_devs]) == 1) {
 188                         nb_dev++;
 189                 }
 190         }
 191
 192         return nb_dev;
 193 }
 194
 195 /*******************************************************************************
 196  * scan the usb and reports device info
 197  * to the user if mode = 1
 198  * returns current device or -1 if no
 199  */
 200 int usb_stor_scan(int mode)
 201 {
 202         unsigned char i, iface;
 203         struct usb_device *dev;
 204
 205         if (mode == 1)
 206                 printf("       scanning usb for storage devices... ");
 207
 208         usb_disable_asynch(1); /* asynch transfer not allowed */
 209
 210         for (i = 0; i < USB_MAX_STOR_DEV; i++) {
 211                 memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
 212                 usb_dev_desc[i].if_type = IF_TYPE_USB;
 213                 usb_dev_desc[i].dev = i;
 214                 usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
 215                 usb_dev_desc[i].target = 0xff;
 216                 usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
 217                 usb_dev_desc[i].block_read = usb_stor_read;
 218                 usb_dev_desc[i].block_write = usb_stor_write;
 219         }
 220
 221         usb_max_devs = 0;
 222         for (i = 0; i < USB_MAX_DEVICE; i++) {
 223                 dev = usb_get_dev_index(i); /* get device */
 224                 debug("i=%d\n", i);
 225                 if (dev == NULL)
 226                         break; /* no more devices available */
 227
 228                 for (iface = 0; iface < dev->config.no_of_if; iface++) {
 229                         usb_max_devs += usb_storage_register(dev, iface);
 230                 }
 231
 232                 /* if storage device */
 233                 if (usb_max_devs == USB_MAX_STOR_DEV) {
 234                         printf("max USB Storage Device reached: %d stopping\n",
 235                                 usb_max_devs);
 236                         break;
 237                 }
 238         } /* for */
 239
 240         usb_disable_asynch(0); /* asynch transfer allowed */
 241         printf("%d Storage Device(s) found\n", usb_max_devs);
 242         if (usb_max_devs > 0)
 243                 return 0;
 244         return -1;
 245 }
 246
 247 static int usb_stor_irq(struct usb_device *dev)
 248 {
 249         struct us_data *us;
 250         us = (struct us_data *)dev->privptr;
 251
 252         if (us->ip_wanted)
 253                 us->ip_wanted = 0;
 254         return 0;
 255 }
 256
 257
 258 #ifdef  DEBUG
 259
 260 static void usb_show_srb(ccb *pccb)
 261 {
 262         int i;
 263         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
 264         for (i = 0; i < 12; i++)
 265                 printf("%02X ", pccb->cmd[i]);
 266         printf("\n");
 267 }
 268
 269 static void display_int_status(unsigned long tmp)
 270 {
 271         printf("Status: %s %s %s %s %s %s %s\n",
 272                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 273                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 274                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 275                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 276                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 277                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 278                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 279 }
 280 #endif
 281 /***********************************************************************
 282  * Data transfer routines
 283  ***********************************************************************/
 284
 285 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 286 {
 287         int max_size;
 288         int this_xfer;
 289         int result;
 290         int partial;
 291         int maxtry;
 292         int stat;
 293
 294         /* determine the maximum packet size for these transfers */
 295         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 296
 297         /* while we have data left to transfer */
 298         while (length) {
 299
 300                 /* calculate how long this will be -- maximum or a remainder */
 301                 this_xfer = length > max_size ? max_size : length;
 302                 length -= this_xfer;
 303
 304                 /* setup the retry counter */
 305                 maxtry = 10;
 306
 307                 /* set up the transfer loop */
 308                 do {
 309                         /* transfer the data */
 310                         debug("Bulk xfer 0x%lx(%d) try #%d\n",
 311                               (ulong)map_to_sysmem(buf), this_xfer,
 312                               11 - maxtry);
 313                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 314                                               this_xfer, &partial,
 315                                               USB_CNTL_TIMEOUT * 5);
 316                         debug("bulk_msg returned %d xferred %d/%d\n",
 317                               result, partial, this_xfer);
 318                         if (us->pusb_dev->status != 0) {
 319                                 /* if we stall, we need to clear it before
 320                                  * we go on
 321                                  */
 322 #ifdef DEBUG
 323                                 display_int_status(us->pusb_dev->status);
 324 #endif
 325                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 326                                         debug("stalled ->clearing endpoint" \
 327                                               "halt for pipe 0x%x\n", pipe);
 328                                         stat = us->pusb_dev->status;
 329                                         usb_clear_halt(us->pusb_dev, pipe);
 330                                         us->pusb_dev->status = stat;
 331                                         if (this_xfer == partial) {
 332                                                 debug("bulk transferred" \
 333                                                       "with error %lX," \
 334                                                       " but data ok\n",
 335                                                       us->pusb_dev->status);
 336                                                 return 0;
 337                                         }
 338                                         else
 339                                                 return result;
 340                                 }
 341                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 342                                         debug("Device NAKed bulk_msg\n");
 343                                         return result;
 344                                 }
 345                                 debug("bulk transferred with error");
 346                                 if (this_xfer == partial) {
 347                                         debug(" %ld, but data ok\n",
 348                                               us->pusb_dev->status);
 349                                         return 0;
 350                                 }
 351                                 /* if our try counter reaches 0, bail out */
 352                                         debug(" %ld, data %d\n",
 353                                               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         debug("BBB_reset\n");
 388         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 389                                  US_BBB_RESET,
 390                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 391                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
 392
 393         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 394                 debug("RESET:stall\n");
 395                 return -1;
 396         }
 397
 398         /* long wait for reset */
 399         mdelay(150);
 400         debug("BBB_reset result %d: status %lX reset\n",
 401               result, us->pusb_dev->status);
 402         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 403         result = usb_clear_halt(us->pusb_dev, pipe);
 404         /* long wait for reset */
 405         mdelay(150);
 406         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
 407               result, us->pusb_dev->status);
 408         /* long wait for reset */
 409         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 410         result = usb_clear_halt(us->pusb_dev, pipe);
 411         mdelay(150);
 412         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
 413               result, us->pusb_dev->status);
 414         debug("BBB_reset done\n");
 415         return 0;
 416 }
 417
 418 /* FIXME: this reset function doesn't really reset the port, and it
 419  * should. Actually it should probably do what it's doing here, and
 420  * reset the port physically
 421  */
 422 static int usb_stor_CB_reset(struct us_data *us)
 423 {
 424         unsigned char cmd[12];
 425         int result;
 426
 427         debug("CB_reset\n");
 428         memset(cmd, 0xff, sizeof(cmd));
 429         cmd[0] = SCSI_SEND_DIAG;
 430         cmd[1] = 4;
 431         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 432                                  US_CBI_ADSC,
 433                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 434                                  0, us->ifnum, cmd, sizeof(cmd),
 435                                  USB_CNTL_TIMEOUT * 5);
 436
 437         /* long wait for reset */
 438         mdelay(1500);
 439         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
 440               result, us->pusb_dev->status);
 441         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 442         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 443
 444         debug("CB_reset done\n");
 445         return 0;
 446 }
 447
 448 /*
 449  * Set up the command for a BBB device. Note that the actual SCSI
 450  * command is copied into cbw.CBWCDB.
 451  */
 452 static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
 453 {
 454         int result;
 455         int actlen;
 456         int dir_in;
 457         unsigned int pipe;
 458         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_cbw, cbw, 1);
 459
 460         dir_in = US_DIRECTION(srb->cmd[0]);
 461
 462 #ifdef BBB_COMDAT_TRACE
 463         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
 464                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 465                 srb->pdata);
 466         if (srb->cmdlen) {
 467                 for (result = 0; result < srb->cmdlen; result++)
 468                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 469                 printf("\n");
 470         }
 471 #endif
 472         /* sanity checks */
 473         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 474                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
 475                 return -1;
 476         }
 477
 478         /* always OUT to the ep */
 479         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 480
 481         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 482         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 483         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 484         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 485         cbw->bCBWLUN = srb->lun;
 486         cbw->bCDBLength = srb->cmdlen;
 487         /* copy the command data into the CBW command data buffer */
 488         /* DST SRC LEN!!! */
 489
 490         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 491         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 492                               &actlen, USB_CNTL_TIMEOUT * 5);
 493         if (result < 0)
 494                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 495         return result;
 496 }
 497
 498 /* FIXME: we also need a CBI_command which sets up the completion
 499  * interrupt, and waits for it
 500  */
 501 static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 502 {
 503         int result = 0;
 504         int dir_in, retry;
 505         unsigned int pipe;
 506         unsigned long status;
 507
 508         retry = 5;
 509         dir_in = US_DIRECTION(srb->cmd[0]);
 510
 511         if (dir_in)
 512                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 513         else
 514                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 515
 516         while (retry--) {
 517                 debug("CBI gets a command: Try %d\n", 5 - retry);
 518 #ifdef DEBUG
 519                 usb_show_srb(srb);
 520 #endif
 521                 /* let's send the command via the control pipe */
 522                 result = usb_control_msg(us->pusb_dev,
 523                                          usb_sndctrlpipe(us->pusb_dev , 0),
 524                                          US_CBI_ADSC,
 525                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 526                                          0, us->ifnum,
 527                                          srb->cmd, srb->cmdlen,
 528                                          USB_CNTL_TIMEOUT * 5);
 529                 debug("CB_transport: control msg returned %d, status %lX\n",
 530                       result, us->pusb_dev->status);
 531                 /* check the return code for the command */
 532                 if (result < 0) {
 533                         if (us->pusb_dev->status & USB_ST_STALLED) {
 534                                 status = us->pusb_dev->status;
 535                                 debug(" stall during command found," \
 536                                       " clear pipe\n");
 537                                 usb_clear_halt(us->pusb_dev,
 538                                               usb_sndctrlpipe(us->pusb_dev, 0));
 539                                 us->pusb_dev->status = status;
 540                         }
 541                         debug(" error during command %02X" \
 542                               " Stat = %lX\n", srb->cmd[0],
 543                               us->pusb_dev->status);
 544                         return result;
 545                 }
 546                 /* transfer the data payload for this command, if one exists*/
 547
 548                 debug("CB_transport: control msg returned %d," \
 549                       " direction is %s to go 0x%lx\n", result,
 550                       dir_in ? "IN" : "OUT", srb->datalen);
 551                 if (srb->datalen) {
 552                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 553                                                  srb->datalen);
 554                         debug("CBI attempted to transfer data," \
 555                               " result is %d status %lX, len %d\n",
 556                               result, us->pusb_dev->status,
 557                                 us->pusb_dev->act_len);
 558                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 559                                 break;
 560                 } /* if (srb->datalen) */
 561                 else
 562                         break;
 563         }
 564         /* return result */
 565
 566         return result;
 567 }
 568
 569
 570 static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 571 {
 572         int timeout;
 573
 574         us->ip_wanted = 1;
 575         submit_int_msg(us->pusb_dev, us->irqpipe,
 576                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 577         timeout = 1000;
 578         while (timeout--) {
 579                 if (us->ip_wanted == 0)
 580                         break;
 581                 mdelay(10);
 582         }
 583         if (us->ip_wanted) {
 584                 printf("        Did not get interrupt on CBI\n");
 585                 us->ip_wanted = 0;
 586                 return USB_STOR_TRANSPORT_ERROR;
 587         }
 588         debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
 589               us->ip_data, us->pusb_dev->irq_act_len,
 590               us->pusb_dev->irq_status);
 591         /* UFI gives us ASC and ASCQ, like a request sense */
 592         if (us->subclass == US_SC_UFI) {
 593                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 594                     srb->cmd[0] == SCSI_INQUIRY)
 595                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 596                 else if (us->ip_data)
 597                         return USB_STOR_TRANSPORT_FAILED;
 598                 else
 599                         return USB_STOR_TRANSPORT_GOOD;
 600         }
 601         /* otherwise, we interpret the data normally */
 602         switch (us->ip_data) {
 603         case 0x0001:
 604                 return USB_STOR_TRANSPORT_GOOD;
 605         case 0x0002:
 606                 return USB_STOR_TRANSPORT_FAILED;
 607         default:
 608                 return USB_STOR_TRANSPORT_ERROR;
 609         }                       /* switch */
 610         return USB_STOR_TRANSPORT_ERROR;
 611 }
 612
 613 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 614 #define USB_TRANSPORT_NOT_READY_RETRY 10
 615
 616 /* clear a stall on an endpoint - special for BBB devices */
 617 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 618 {
 619         int result;
 620
 621         /* ENDPOINT_HALT = 0, so set value to 0 */
 622         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 623                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
 624                                 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 625         return result;
 626 }
 627
 628 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
 629 {
 630         int result, retry;
 631         int dir_in;
 632         int actlen, data_actlen;
 633         unsigned int pipe, pipein, pipeout;
 634         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_csw, csw, 1);
 635 #ifdef BBB_XPORT_TRACE
 636         unsigned char *ptr;
 637         int index;
 638 #endif
 639
 640         dir_in = US_DIRECTION(srb->cmd[0]);
 641
 642         /* COMMAND phase */
 643         debug("COMMAND phase\n");
 644         result = usb_stor_BBB_comdat(srb, us);
 645         if (result < 0) {
 646                 debug("failed to send CBW status %ld\n",
 647                       us->pusb_dev->status);
 648                 usb_stor_BBB_reset(us);
 649                 return USB_STOR_TRANSPORT_FAILED;
 650         }
 651         if (!(us->flags & USB_READY))
 652                 mdelay(5);
 653         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 654         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 655         /* DATA phase + error handling */
 656         data_actlen = 0;
 657         /* no data, go immediately to the STATUS phase */
 658         if (srb->datalen == 0)
 659                 goto st;
 660         debug("DATA phase\n");
 661         if (dir_in)
 662                 pipe = pipein;
 663         else
 664                 pipe = pipeout;
 665
 666         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 667                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 668         /* special handling of STALL in DATA phase */
 669         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 670                 debug("DATA:stall\n");
 671                 /* clear the STALL on the endpoint */
 672                 result = usb_stor_BBB_clear_endpt_stall(us,
 673                                         dir_in ? us->ep_in : us->ep_out);
 674                 if (result >= 0)
 675                         /* continue on to STATUS phase */
 676                         goto st;
 677         }
 678         if (result < 0) {
 679                 debug("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         for (index = 0; index < data_actlen; index++)
 686                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 687         printf("\n");
 688 #endif
 689         /* STATUS phase + error handling */
 690 st:
 691         retry = 0;
 692 again:
 693         debug("STATUS phase\n");
 694         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 695                                 &actlen, USB_CNTL_TIMEOUT*5);
 696
 697         /* special handling of STALL in STATUS phase */
 698         if ((result < 0) && (retry < 1) &&
 699             (us->pusb_dev->status & USB_ST_STALLED)) {
 700                 debug("STATUS:stall\n");
 701                 /* clear the STALL on the endpoint */
 702                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 703                 if (result >= 0 && (retry++ < 1))
 704                         /* do a retry */
 705                         goto again;
 706         }
 707         if (result < 0) {
 708                 debug("usb_bulk_msg error status %ld\n",
 709                       us->pusb_dev->status);
 710                 usb_stor_BBB_reset(us);
 711                 return USB_STOR_TRANSPORT_FAILED;
 712         }
 713 #ifdef BBB_XPORT_TRACE
 714         ptr = (unsigned char *)csw;
 715         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 716                 printf("ptr[%d] %#x ", index, ptr[index]);
 717         printf("\n");
 718 #endif
 719         /* misuse pipe to get the residue */
 720         pipe = le32_to_cpu(csw->dCSWDataResidue);
 721         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 722                 pipe = srb->datalen - data_actlen;
 723         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 724                 debug("!CSWSIGNATURE\n");
 725                 usb_stor_BBB_reset(us);
 726                 return USB_STOR_TRANSPORT_FAILED;
 727         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 728                 debug("!Tag\n");
 729                 usb_stor_BBB_reset(us);
 730                 return USB_STOR_TRANSPORT_FAILED;
 731         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 732                 debug(">PHASE\n");
 733                 usb_stor_BBB_reset(us);
 734                 return USB_STOR_TRANSPORT_FAILED;
 735         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 736                 debug("=PHASE\n");
 737                 usb_stor_BBB_reset(us);
 738                 return USB_STOR_TRANSPORT_FAILED;
 739         } else if (data_actlen > srb->datalen) {
 740                 debug("transferred %dB instead of %ldB\n",
 741                       data_actlen, srb->datalen);
 742                 return USB_STOR_TRANSPORT_FAILED;
 743         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 744                 debug("FAILED\n");
 745                 return USB_STOR_TRANSPORT_FAILED;
 746         }
 747
 748         return result;
 749 }
 750
 751 static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 752 {
 753         int result, status;
 754         ccb *psrb;
 755         ccb reqsrb;
 756         int retry, notready;
 757
 758         psrb = &reqsrb;
 759         status = USB_STOR_TRANSPORT_GOOD;
 760         retry = 0;
 761         notready = 0;
 762         /* issue the command */
 763 do_retry:
 764         result = usb_stor_CB_comdat(srb, us);
 765         debug("command / Data returned %d, status %lX\n",
 766               result, us->pusb_dev->status);
 767         /* if this is an CBI Protocol, get IRQ */
 768         if (us->protocol == US_PR_CBI) {
 769                 status = usb_stor_CBI_get_status(srb, us);
 770                 /* if the status is error, report it */
 771                 if (status == USB_STOR_TRANSPORT_ERROR) {
 772                         debug(" USB CBI Command Error\n");
 773                         return status;
 774                 }
 775                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 776                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 777                 if (!us->ip_data) {
 778                         /* if the status is good, report it */
 779                         if (status == USB_STOR_TRANSPORT_GOOD) {
 780                                 debug(" USB CBI Command Good\n");
 781                                 return status;
 782                         }
 783                 }
 784         }
 785         /* do we have to issue an auto request? */
 786         /* HERE we have to check the result */
 787         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 788                 debug("ERROR %lX\n", us->pusb_dev->status);
 789                 us->transport_reset(us);
 790                 return USB_STOR_TRANSPORT_ERROR;
 791         }
 792         if ((us->protocol == US_PR_CBI) &&
 793             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 794             (srb->cmd[0] == SCSI_INQUIRY))) {
 795                 /* do not issue an autorequest after request sense */
 796                 debug("No auto request and good\n");
 797                 return USB_STOR_TRANSPORT_GOOD;
 798         }
 799         /* issue an request_sense */
 800         memset(&psrb->cmd[0], 0, 12);
 801         psrb->cmd[0] = SCSI_REQ_SENSE;
 802         psrb->cmd[1] = srb->lun << 5;
 803         psrb->cmd[4] = 18;
 804         psrb->datalen = 18;
 805         psrb->pdata = &srb->sense_buf[0];
 806         psrb->cmdlen = 12;
 807         /* issue the command */
 808         result = usb_stor_CB_comdat(psrb, us);
 809         debug("auto request returned %d\n", result);
 810         /* if this is an CBI Protocol, get IRQ */
 811         if (us->protocol == US_PR_CBI)
 812                 status = usb_stor_CBI_get_status(psrb, us);
 813
 814         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 815                 debug(" AUTO REQUEST ERROR %ld\n",
 816                       us->pusb_dev->status);
 817                 return USB_STOR_TRANSPORT_ERROR;
 818         }
 819         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 820               srb->sense_buf[0], srb->sense_buf[2],
 821               srb->sense_buf[12], srb->sense_buf[13]);
 822         /* Check the auto request result */
 823         if ((srb->sense_buf[2] == 0) &&
 824             (srb->sense_buf[12] == 0) &&
 825             (srb->sense_buf[13] == 0)) {
 826                 /* ok, no sense */
 827                 return USB_STOR_TRANSPORT_GOOD;
 828         }
 829
 830         /* Check the auto request result */
 831         switch (srb->sense_buf[2]) {
 832         case 0x01:
 833                 /* Recovered Error */
 834                 return USB_STOR_TRANSPORT_GOOD;
 835                 break;
 836         case 0x02:
 837                 /* Not Ready */
 838                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 839                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 840                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 841                                 srb->sense_buf[0], srb->sense_buf[2],
 842                                 srb->sense_buf[12], srb->sense_buf[13]);
 843                         return USB_STOR_TRANSPORT_FAILED;
 844                 } else {
 845                         mdelay(100);
 846                         goto do_retry;
 847                 }
 848                 break;
 849         default:
 850                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 851                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 852                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 853                                 srb->sense_buf[2], srb->sense_buf[12],
 854                                 srb->sense_buf[13]);
 855                         return USB_STOR_TRANSPORT_FAILED;
 856                 } else
 857                         goto do_retry;
 858                 break;
 859         }
 860         return USB_STOR_TRANSPORT_FAILED;
 861 }
 862
 863
 864 static int usb_inquiry(ccb *srb, struct us_data *ss)
 865 {
 866         int retry, i;
 867         retry = 5;
 868         do {
 869                 memset(&srb->cmd[0], 0, 12);
 870                 srb->cmd[0] = SCSI_INQUIRY;
 871                 srb->cmd[1] = srb->lun << 5;
 872                 srb->cmd[4] = 36;
 873                 srb->datalen = 36;
 874                 srb->cmdlen = 12;
 875                 i = ss->transport(srb, ss);
 876                 debug("inquiry returns %d\n", i);
 877                 if (i == 0)
 878                         break;
 879         } while (--retry);
 880
 881         if (!retry) {
 882                 printf("error in inquiry\n");
 883                 return -1;
 884         }
 885         return 0;
 886 }
 887
 888 static int usb_request_sense(ccb *srb, struct us_data *ss)
 889 {
 890         char *ptr;
 891
 892         ptr = (char *)srb->pdata;
 893         memset(&srb->cmd[0], 0, 12);
 894         srb->cmd[0] = SCSI_REQ_SENSE;
 895         srb->cmd[1] = srb->lun << 5;
 896         srb->cmd[4] = 18;
 897         srb->datalen = 18;
 898         srb->pdata = &srb->sense_buf[0];
 899         srb->cmdlen = 12;
 900         ss->transport(srb, ss);
 901         debug("Request Sense returned %02X %02X %02X\n",
 902               srb->sense_buf[2], srb->sense_buf[12],
 903               srb->sense_buf[13]);
 904         srb->pdata = (uchar *)ptr;
 905         return 0;
 906 }
 907
 908 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
 909 {
 910         int retries = 10;
 911
 912         do {
 913                 memset(&srb->cmd[0], 0, 12);
 914                 srb->cmd[0] = SCSI_TST_U_RDY;
 915                 srb->cmd[1] = srb->lun << 5;
 916                 srb->datalen = 0;
 917                 srb->cmdlen = 12;
 918                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
 919                         ss->flags |= USB_READY;
 920                         return 0;
 921                 }
 922                 usb_request_sense(srb, ss);
 923                 /*
 924                  * Check the Key Code Qualifier, if it matches
 925                  * "Not Ready - medium not present"
 926                  * (the sense Key equals 0x2 and the ASC is 0x3a)
 927                  * return immediately as the medium being absent won't change
 928                  * unless there is a user action.
 929                  */
 930                 if ((srb->sense_buf[2] == 0x02) &&
 931                     (srb->sense_buf[12] == 0x3a))
 932                         return -1;
 933                 mdelay(100);
 934         } while (retries--);
 935
 936         return -1;
 937 }
 938
 939 static int usb_read_capacity(ccb *srb, struct us_data *ss)
 940 {
 941         int retry;
 942         /* XXX retries */
 943         retry = 3;
 944         do {
 945                 memset(&srb->cmd[0], 0, 12);
 946                 srb->cmd[0] = SCSI_RD_CAPAC;
 947                 srb->cmd[1] = srb->lun << 5;
 948                 srb->datalen = 8;
 949                 srb->cmdlen = 12;
 950                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 951                         return 0;
 952         } while (retry--);
 953
 954         return -1;
 955 }
 956
 957 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
 958                        unsigned short blocks)
 959 {
 960         memset(&srb->cmd[0], 0, 12);
 961         srb->cmd[0] = SCSI_READ10;
 962         srb->cmd[1] = srb->lun << 5;
 963         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 964         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 965         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 966         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 967         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 968         srb->cmd[8] = (unsigned char) blocks & 0xff;
 969         srb->cmdlen = 12;
 970         debug("read10: start %lx blocks %x\n", start, blocks);
 971         return ss->transport(srb, ss);
 972 }
 973
 974 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
 975                         unsigned short blocks)
 976 {
 977         memset(&srb->cmd[0], 0, 12);
 978         srb->cmd[0] = SCSI_WRITE10;
 979         srb->cmd[1] = srb->lun << 5;
 980         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 981         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 982         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 983         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 984         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 985         srb->cmd[8] = (unsigned char) blocks & 0xff;
 986         srb->cmdlen = 12;
 987         debug("write10: start %lx blocks %x\n", start, blocks);
 988         return ss->transport(srb, ss);
 989 }
 990
 991
 992 #ifdef CONFIG_USB_BIN_FIXUP
 993 /*
 994  * Some USB storage devices queried for SCSI identification data respond with
 995  * binary strings, which if output to the console freeze the terminal. The
 996  * workaround is to modify the vendor and product strings read from such
 997  * device with proper values (as reported by 'usb info').
 998  *
 999  * Vendor and product length limits are taken from the definition of
1000  * block_dev_desc_t in include/part.h.
1001  */
1002 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1003                                 unsigned char vendor[],
1004                                 unsigned char product[]) {
1005         const unsigned char max_vendor_len = 40;
1006         const unsigned char max_product_len = 20;
1007         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1008                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1009                 strncpy((char *)product, "Flash Media Cntrller",
1010                         max_product_len);
1011         }
1012 }
1013 #endif /* CONFIG_USB_BIN_FIXUP */
1014
1015 unsigned long usb_stor_read(int device, lbaint_t blknr,
1016                             lbaint_t blkcnt, void *buffer)
1017 {
1018         lbaint_t start, blks;
1019         uintptr_t buf_addr;
1020         unsigned short smallblks;
1021         struct usb_device *dev;
1022         struct us_data *ss;
1023         int retry;
1024         ccb *srb = &usb_ccb;
1025
1026         if (blkcnt == 0)
1027                 return 0;
1028
1029         device &= 0xff;
1030         /* Setup  device */
1031         debug("\nusb_read: dev %d\n", device);
1032         dev = usb_dev_desc[device].priv;
1033         if (!dev) {
1034                 debug("%s: No device\n", __func__);
1035                 return 0;
1036         }
1037         ss = (struct us_data *)dev->privptr;
1038
1039         usb_disable_asynch(1); /* asynch transfer not allowed */
1040         srb->lun = usb_dev_desc[device].lun;
1041         buf_addr = (uintptr_t)buffer;
1042         start = blknr;
1043         blks = blkcnt;
1044
1045         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
1046               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1047
1048         do {
1049                 /* XXX need some comment here */
1050                 retry = 2;
1051                 srb->pdata = (unsigned char *)buf_addr;
1052                 if (blks > USB_MAX_XFER_BLK)
1053                         smallblks = USB_MAX_XFER_BLK;
1054                 else
1055                         smallblks = (unsigned short) blks;
1056 retry_it:
1057                 if (smallblks == USB_MAX_XFER_BLK)
1058                         usb_show_progress();
1059                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1060                 srb->pdata = (unsigned char *)buf_addr;
1061                 if (usb_read_10(srb, ss, start, smallblks)) {
1062                         debug("Read ERROR\n");
1063                         usb_request_sense(srb, ss);
1064                         if (retry--)
1065                                 goto retry_it;
1066                         blkcnt -= blks;
1067                         break;
1068                 }
1069                 start += smallblks;
1070                 blks -= smallblks;
1071                 buf_addr += srb->datalen;
1072         } while (blks != 0);
1073         ss->flags &= ~USB_READY;
1074
1075         debug("usb_read: end startblk " LBAF
1076               ", blccnt %x buffer %" PRIxPTR "\n",
1077               start, smallblks, buf_addr);
1078
1079         usb_disable_asynch(0); /* asynch transfer allowed */
1080         if (blkcnt >= USB_MAX_XFER_BLK)
1081                 debug("\n");
1082         return blkcnt;
1083 }
1084
1085 unsigned long usb_stor_write(int device, lbaint_t blknr,
1086                                 lbaint_t blkcnt, const void *buffer)
1087 {
1088         lbaint_t start, blks;
1089         uintptr_t buf_addr;
1090         unsigned short smallblks;
1091         struct usb_device *dev;
1092         struct us_data *ss;
1093         int retry;
1094         ccb *srb = &usb_ccb;
1095
1096         if (blkcnt == 0)
1097                 return 0;
1098
1099         device &= 0xff;
1100         /* Setup  device */
1101         debug("\nusb_write: dev %d\n", device);
1102         dev = usb_dev_desc[device].priv;
1103         if (!dev)
1104                 return 0;
1105         ss = (struct us_data *)dev->privptr;
1106
1107         usb_disable_asynch(1); /* asynch transfer not allowed */
1108
1109         srb->lun = usb_dev_desc[device].lun;
1110         buf_addr = (uintptr_t)buffer;
1111         start = blknr;
1112         blks = blkcnt;
1113
1114         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
1115               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1116
1117         do {
1118                 /* If write fails retry for max retry count else
1119                  * return with number of blocks written successfully.
1120                  */
1121                 retry = 2;
1122                 srb->pdata = (unsigned char *)buf_addr;
1123                 if (blks > USB_MAX_XFER_BLK)
1124                         smallblks = USB_MAX_XFER_BLK;
1125                 else
1126                         smallblks = (unsigned short) blks;
1127 retry_it:
1128                 if (smallblks == USB_MAX_XFER_BLK)
1129                         usb_show_progress();
1130                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1131                 srb->pdata = (unsigned char *)buf_addr;
1132                 if (usb_write_10(srb, ss, start, smallblks)) {
1133                         debug("Write ERROR\n");
1134                         usb_request_sense(srb, ss);
1135                         if (retry--)
1136                                 goto retry_it;
1137                         blkcnt -= blks;
1138                         break;
1139                 }
1140                 start += smallblks;
1141                 blks -= smallblks;
1142                 buf_addr += srb->datalen;
1143         } while (blks != 0);
1144         ss->flags &= ~USB_READY;
1145
1146         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1147               PRIxPTR "\n", start, smallblks, buf_addr);
1148
1149         usb_disable_asynch(0); /* asynch transfer allowed */
1150         if (blkcnt >= USB_MAX_XFER_BLK)
1151                 debug("\n");
1152         return blkcnt;
1153
1154 }
1155
1156 /* Probe to see if a new device is actually a Storage device */
1157 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1158                       struct us_data *ss)
1159 {
1160         struct usb_interface *iface;
1161         int i;
1162         struct usb_endpoint_descriptor *ep_desc;
1163         unsigned int flags = 0;
1164
1165         int protocol = 0;
1166         int subclass = 0;
1167
1168         /* let's examine the device now */
1169         iface = &dev->config.if_desc[ifnum];
1170
1171 #if 0
1172         /* this is the place to patch some storage devices */
1173         debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1174                         dev->descriptor.idProduct);
1175
1176         if ((dev->descriptor.idVendor) == 0x066b &&
1177             (dev->descriptor.idProduct) == 0x0103) {
1178                 debug("patched for E-USB\n");
1179                 protocol = US_PR_CB;
1180                 subclass = US_SC_UFI;       /* an assumption */
1181         }
1182 #endif
1183
1184         if (dev->descriptor.bDeviceClass != 0 ||
1185                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1186                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1187                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1188                 debug("Not mass storage\n");
1189                 /* if it's not a mass storage, we go no further */
1190                 return 0;
1191         }
1192
1193         memset(ss, 0, sizeof(struct us_data));
1194
1195         /* At this point, we know we've got a live one */
1196         debug("\n\nUSB Mass Storage device detected\n");
1197
1198         /* Initialize the us_data structure with some useful info */
1199         ss->flags = flags;
1200         ss->ifnum = ifnum;
1201         ss->pusb_dev = dev;
1202         ss->attention_done = 0;
1203
1204         /* If the device has subclass and protocol, then use that.  Otherwise,
1205          * take data from the specific interface.
1206          */
1207         if (subclass) {
1208                 ss->subclass = subclass;
1209                 ss->protocol = protocol;
1210         } else {
1211                 ss->subclass = iface->desc.bInterfaceSubClass;
1212                 ss->protocol = iface->desc.bInterfaceProtocol;
1213         }
1214
1215         /* set the handler pointers based on the protocol */
1216         debug("Transport: ");
1217         switch (ss->protocol) {
1218         case US_PR_CB:
1219                 debug("Control/Bulk\n");
1220                 ss->transport = usb_stor_CB_transport;
1221                 ss->transport_reset = usb_stor_CB_reset;
1222                 break;
1223
1224         case US_PR_CBI:
1225                 debug("Control/Bulk/Interrupt\n");
1226                 ss->transport = usb_stor_CB_transport;
1227                 ss->transport_reset = usb_stor_CB_reset;
1228                 break;
1229         case US_PR_BULK:
1230                 debug("Bulk/Bulk/Bulk\n");
1231                 ss->transport = usb_stor_BBB_transport;
1232                 ss->transport_reset = usb_stor_BBB_reset;
1233                 break;
1234         default:
1235                 printf("USB Storage Transport unknown / not yet implemented\n");
1236                 return 0;
1237                 break;
1238         }
1239
1240         /*
1241          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1242          * An optional interrupt is OK (necessary for CBI protocol).
1243          * We will ignore any others.
1244          */
1245         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1246                 ep_desc = &iface->ep_desc[i];
1247                 /* is it an BULK endpoint? */
1248                 if ((ep_desc->bmAttributes &
1249                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1250                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1251                                 ss->ep_in = ep_desc->bEndpointAddress &
1252                                                 USB_ENDPOINT_NUMBER_MASK;
1253                         else
1254                                 ss->ep_out =
1255                                         ep_desc->bEndpointAddress &
1256                                         USB_ENDPOINT_NUMBER_MASK;
1257                 }
1258
1259                 /* is it an interrupt endpoint? */
1260                 if ((ep_desc->bmAttributes &
1261                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1262                         ss->ep_int = ep_desc->bEndpointAddress &
1263                                                 USB_ENDPOINT_NUMBER_MASK;
1264                         ss->irqinterval = ep_desc->bInterval;
1265                 }
1266         }
1267         debug("Endpoints In %d Out %d Int %d\n",
1268               ss->ep_in, ss->ep_out, ss->ep_int);
1269
1270         /* Do some basic sanity checks, and bail if we find a problem */
1271         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1272             !ss->ep_in || !ss->ep_out ||
1273             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1274                 debug("Problems with device\n");
1275                 return 0;
1276         }
1277         /* set class specific stuff */
1278         /* We only handle certain protocols.  Currently, these are
1279          * the only ones.
1280          * The SFF8070 accepts the requests used in u-boot
1281          */
1282         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1283             ss->subclass != US_SC_8070) {
1284                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1285                 return 0;
1286         }
1287         if (ss->ep_int) {
1288                 /* we had found an interrupt endpoint, prepare irq pipe
1289                  * set up the IRQ pipe and handler
1290                  */
1291                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1292                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1293                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1294                 dev->irq_handle = usb_stor_irq;
1295         }
1296         dev->privptr = (void *)ss;
1297         return 1;
1298 }
1299
1300 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1301                       block_dev_desc_t *dev_desc)
1302 {
1303         unsigned char perq, modi;
1304         ALLOC_CACHE_ALIGN_BUFFER(u32, cap, 2);
1305         ALLOC_CACHE_ALIGN_BUFFER(u8, usb_stor_buf, 36);
1306         u32 capacity, blksz;
1307         ccb *pccb = &usb_ccb;
1308
1309         pccb->pdata = usb_stor_buf;
1310
1311         dev_desc->target = dev->devnum;
1312         pccb->lun = dev_desc->lun;
1313         debug(" address %d\n", dev_desc->target);
1314
1315         if (usb_inquiry(pccb, ss)) {
1316                 debug("%s: usb_inquiry() failed\n", __func__);
1317                 return -1;
1318         }
1319
1320         perq = usb_stor_buf[0];
1321         modi = usb_stor_buf[1];
1322
1323         /*
1324          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1325          * they would not respond to test_unit_ready .
1326          */
1327         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1328                 debug("%s: unknown/unsupported device\n", __func__);
1329                 return 0;
1330         }
1331         if ((modi&0x80) == 0x80) {
1332                 /* drive is removable */
1333                 dev_desc->removable = 1;
1334         }
1335         memcpy(dev_desc->vendor, (const void *)&usb_stor_buf[8], 8);
1336         memcpy(dev_desc->product, (const void *)&usb_stor_buf[16], 16);
1337         memcpy(dev_desc->revision, (const void *)&usb_stor_buf[32], 4);
1338         dev_desc->vendor[8] = 0;
1339         dev_desc->product[16] = 0;
1340         dev_desc->revision[4] = 0;
1341 #ifdef CONFIG_USB_BIN_FIXUP
1342         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1343                       (uchar *)dev_desc->product);
1344 #endif /* CONFIG_USB_BIN_FIXUP */
1345         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1346               usb_stor_buf[3]);
1347         if (usb_test_unit_ready(pccb, ss)) {
1348                 printf("Device NOT ready\n"
1349                        "   Request Sense returned %02X %02X %02X\n",
1350                        pccb->sense_buf[2], pccb->sense_buf[12],
1351                        pccb->sense_buf[13]);
1352                 if (dev_desc->removable == 1) {
1353                         dev_desc->type = perq;
1354                         return 1;
1355                 }
1356                 return 0;
1357         }
1358         pccb->pdata = (unsigned char *)cap;
1359         memset(pccb->pdata, 0, 8);
1360         if (usb_read_capacity(pccb, ss) != 0) {
1361                 printf("READ_CAP ERROR\n");
1362                 cap[0] = 2880;
1363                 cap[1] = 0x200;
1364         }
1365         ss->flags &= ~USB_READY;
1366         debug("Read Capacity returns: 0x%08x, 0x%08x\n", cap[0], cap[1]);
1367 #if 0
1368         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1369                 cap[0] >>= 16;
1370
1371         cap[0] = cpu_to_be32(cap[0]);
1372         cap[1] = cpu_to_be32(cap[1]);
1373 #endif
1374
1375         capacity = be32_to_cpu(cap[0]) + 1;
1376         blksz = be32_to_cpu(cap[1]);
1377
1378         debug("Capacity = 0x%08x, blocksz = 0x%08x\n", capacity, blksz);
1379         dev_desc->lba = capacity;
1380         dev_desc->blksz = blksz;
1381         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1382         dev_desc->type = perq;
1383         debug(" address %d\n", dev_desc->target);
1384         debug("partype: %d\n", dev_desc->part_type);
1385
1386         init_part(dev_desc);
1387
1388         debug("partype: %d\n", dev_desc->part_type);
1389         return 1;
1390 }