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 <errno.h>
  37 #include <inttypes.h>
  38 #include <mapmem.h>
  39 #include <asm/byteorder.h>
  40 #include <asm/processor.h>
  41
  42 #include <part.h>
  43 #include <usb.h>
  44
  45 #undef BBB_COMDAT_TRACE
  46 #undef BBB_XPORT_TRACE
  47
  48 #include <scsi.h>
  49 /* direction table -- this indicates the direction of the data
  50  * transfer for each command code -- a 1 indicates input
  51  */
  52 static const unsigned char us_direction[256/8] = {
  53         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  54         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  55         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  56         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  57 };
  58 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  59
  60 static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
  61 static __u32 CBWTag;
  62
  63 #define USB_MAX_STOR_DEV 5
  64 static int usb_max_devs; /* number of highest available usb device */
  65
  66 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
  67
  68 struct us_data;
  69 typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
  70 typedef int (*trans_reset)(struct us_data *data);
  71
  72 struct us_data {
  73         struct usb_device *pusb_dev;     /* this usb_device */
  74
  75         unsigned int    flags;                  /* from filter initially */
  76 #       define USB_READY        (1 << 0)
  77         unsigned char   ifnum;                  /* interface number */
  78         unsigned char   ep_in;                  /* in endpoint */
  79         unsigned char   ep_out;                 /* out ....... */
  80         unsigned char   ep_int;                 /* interrupt . */
  81         unsigned char   subclass;               /* as in overview */
  82         unsigned char   protocol;               /* .............. */
  83         unsigned char   attention_done;         /* force attn on first cmd */
  84         unsigned short  ip_data;                /* interrupt data */
  85         int             action;                 /* what to do */
  86         int             ip_wanted;              /* needed */
  87         int             *irq_handle;            /* for USB int requests */
  88         unsigned int    irqpipe;                /* pipe for release_irq */
  89         unsigned char   irqmaxp;                /* max packed for irq Pipe */
  90         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
  91         ccb             *srb;                   /* current srb */
  92         trans_reset     transport_reset;        /* reset routine */
  93         trans_cmnd      transport;              /* transport routine */
  94 };
  95
  96 #ifdef CONFIG_USB_EHCI
  97 /*
  98  * The U-Boot EHCI driver can handle any transfer length as long as there is
  99  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
 100  * limited to 65535 blocks.
 101  */
 102 #define USB_MAX_XFER_BLK        65535
 103 #else
 104 #define USB_MAX_XFER_BLK        20
 105 #endif
 106
 107 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 108
 109
 110 #define USB_STOR_TRANSPORT_GOOD    0
 111 #define USB_STOR_TRANSPORT_FAILED -1
 112 #define USB_STOR_TRANSPORT_ERROR  -2
 113
 114 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
 115                       block_dev_desc_t *dev_desc);
 116 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 117                       struct us_data *ss);
 118 unsigned long usb_stor_read(int device, lbaint_t blknr,
 119                             lbaint_t blkcnt, void *buffer);
 120 unsigned long usb_stor_write(int device, lbaint_t blknr,
 121                              lbaint_t blkcnt, const void *buffer);
 122 struct usb_device * usb_get_dev_index(int index);
 123 void uhci_show_temp_int_td(void);
 124
 125 #ifdef CONFIG_PARTITIONS
 126 block_dev_desc_t *usb_stor_get_dev(int index)
 127 {
 128         return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
 129 }
 130 #endif
 131
 132 static void usb_show_progress(void)
 133 {
 134         debug(".");
 135 }
 136
 137 /*******************************************************************************
 138  * show info on storage devices; 'usb start/init' must be invoked earlier
 139  * as we only retrieve structures populated during devices initialization
 140  */
 141 int usb_stor_info(void)
 142 {
 143         int i;
 144
 145         if (usb_max_devs > 0) {
 146                 for (i = 0; i < usb_max_devs; i++) {
 147                         printf("  Device %d: ", i);
 148                         dev_print(&usb_dev_desc[i]);
 149                 }
 150                 return 0;
 151         }
 152
 153         printf("No storage devices, perhaps not 'usb start'ed..?\n");
 154         return 1;
 155 }
 156
 157 static unsigned int usb_get_max_lun(struct us_data *us)
 158 {
 159         int len;
 160         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
 161         len = usb_control_msg(us->pusb_dev,
 162                               usb_rcvctrlpipe(us->pusb_dev, 0),
 163                               US_BBB_GET_MAX_LUN,
 164                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 165                               0, us->ifnum,
 166                               result, sizeof(char),
 167                               USB_CNTL_TIMEOUT * 5);
 168         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
 169         return (len > 0) ? *result : 0;
 170 }
 171
 172 static int usb_stor_probe_device(struct usb_device *dev)
 173 {
 174         if (dev == NULL)
 175                 return -ENOENT; /* no more devices available */
 176
 177         debug("\n\nProbing for storage\n");
 178         if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
 179                 /* OK, it's a storage device.  Iterate over its LUNs
 180                         * and populate `usb_dev_desc'.
 181                         */
 182                 int lun, max_lun, start = usb_max_devs;
 183
 184                 max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 185                 for (lun = 0;
 186                         lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
 187                         lun++) {
 188                         struct block_dev_desc *blkdev;
 189
 190                         blkdev = &usb_dev_desc[usb_max_devs];
 191                         memset(blkdev, '\0', sizeof(block_dev_desc_t));
 192                         blkdev->if_type = IF_TYPE_USB;
 193                         blkdev->dev = usb_max_devs;
 194                         blkdev->part_type = PART_TYPE_UNKNOWN;
 195                         blkdev->target = 0xff;
 196                         blkdev->type = DEV_TYPE_UNKNOWN;
 197                         blkdev->block_read = usb_stor_read;
 198                         blkdev->block_write = usb_stor_write;
 199                         blkdev->lun = lun;
 200                         blkdev->priv = dev;
 201
 202                         if (usb_stor_get_info(dev, &usb_stor[start],
 203                                               &usb_dev_desc[usb_max_devs]) ==
 204                                               1) {
 205                                 usb_max_devs++;
 206                                 debug("%s: Found device %p\n", __func__, dev);
 207                         }
 208                 }
 209         }
 210
 211         /* if storage device */
 212         if (usb_max_devs == USB_MAX_STOR_DEV) {
 213                 printf("max USB Storage Device reached: %d stopping\n",
 214                        usb_max_devs);
 215                 return -ENOSPC;
 216         }
 217
 218         return 0;
 219 }
 220
 221 void usb_stor_reset(void)
 222 {
 223         usb_max_devs = 0;
 224 }
 225
 226 /*******************************************************************************
 227  * scan the usb and reports device info
 228  * to the user if mode = 1
 229  * returns current device or -1 if no
 230  */
 231 int usb_stor_scan(int mode)
 232 {
 233         unsigned char i;
 234
 235         if (mode == 1)
 236                 printf("       scanning usb for storage devices... ");
 237
 238         usb_disable_asynch(1); /* asynch transfer not allowed */
 239
 240         usb_stor_reset();
 241         for (i = 0; i < USB_MAX_DEVICE; i++) {
 242                 struct usb_device *dev;
 243
 244                 dev = usb_get_dev_index(i); /* get device */
 245                 debug("i=%d\n", i);
 246                 if (usb_stor_probe_device(dev))
 247                         break;
 248         } /* for */
 249
 250         usb_disable_asynch(0); /* asynch transfer allowed */
 251         printf("%d Storage Device(s) found\n", usb_max_devs);
 252         if (usb_max_devs > 0)
 253                 return 0;
 254         return -1;
 255 }
 256
 257 static int usb_stor_irq(struct usb_device *dev)
 258 {
 259         struct us_data *us;
 260         us = (struct us_data *)dev->privptr;
 261
 262         if (us->ip_wanted)
 263                 us->ip_wanted = 0;
 264         return 0;
 265 }
 266
 267
 268 #ifdef  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         printf("\n");
 277 }
 278
 279 static void display_int_status(unsigned long tmp)
 280 {
 281         printf("Status: %s %s %s %s %s %s %s\n",
 282                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 283                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 284                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 285                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 286                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 287                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 288                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 289 }
 290 #endif
 291 /***********************************************************************
 292  * Data transfer routines
 293  ***********************************************************************/
 294
 295 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 296 {
 297         int max_size;
 298         int this_xfer;
 299         int result;
 300         int partial;
 301         int maxtry;
 302         int stat;
 303
 304         /* determine the maximum packet size for these transfers */
 305         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 306
 307         /* while we have data left to transfer */
 308         while (length) {
 309
 310                 /* calculate how long this will be -- maximum or a remainder */
 311                 this_xfer = length > max_size ? max_size : length;
 312                 length -= this_xfer;
 313
 314                 /* setup the retry counter */
 315                 maxtry = 10;
 316
 317                 /* set up the transfer loop */
 318                 do {
 319                         /* transfer the data */
 320                         debug("Bulk xfer 0x%lx(%d) try #%d\n",
 321                               (ulong)map_to_sysmem(buf), this_xfer,
 322                               11 - maxtry);
 323                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 324                                               this_xfer, &partial,
 325                                               USB_CNTL_TIMEOUT * 5);
 326                         debug("bulk_msg returned %d xferred %d/%d\n",
 327                               result, partial, this_xfer);
 328                         if (us->pusb_dev->status != 0) {
 329                                 /* if we stall, we need to clear it before
 330                                  * we go on
 331                                  */
 332 #ifdef DEBUG
 333                                 display_int_status(us->pusb_dev->status);
 334 #endif
 335                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 336                                         debug("stalled ->clearing endpoint" \
 337                                               "halt for pipe 0x%x\n", pipe);
 338                                         stat = us->pusb_dev->status;
 339                                         usb_clear_halt(us->pusb_dev, pipe);
 340                                         us->pusb_dev->status = stat;
 341                                         if (this_xfer == partial) {
 342                                                 debug("bulk transferred" \
 343                                                       "with error %lX," \
 344                                                       " but data ok\n",
 345                                                       us->pusb_dev->status);
 346                                                 return 0;
 347                                         }
 348                                         else
 349                                                 return result;
 350                                 }
 351                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 352                                         debug("Device NAKed bulk_msg\n");
 353                                         return result;
 354                                 }
 355                                 debug("bulk transferred with error");
 356                                 if (this_xfer == partial) {
 357                                         debug(" %ld, but data ok\n",
 358                                               us->pusb_dev->status);
 359                                         return 0;
 360                                 }
 361                                 /* if our try counter reaches 0, bail out */
 362                                         debug(" %ld, data %d\n",
 363                                               us->pusb_dev->status, partial);
 364                                 if (!maxtry--)
 365                                                 return result;
 366                         }
 367                         /* update to show what data was transferred */
 368                         this_xfer -= partial;
 369                         buf += partial;
 370                         /* continue until this transfer is done */
 371                 } while (this_xfer);
 372         }
 373
 374         /* if we get here, we're done and successful */
 375         return 0;
 376 }
 377
 378 static int usb_stor_BBB_reset(struct us_data *us)
 379 {
 380         int result;
 381         unsigned int pipe;
 382
 383         /*
 384          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
 385          *
 386          * For Reset Recovery the host shall issue in the following order:
 387          * a) a Bulk-Only Mass Storage Reset
 388          * b) a Clear Feature HALT to the Bulk-In endpoint
 389          * c) a Clear Feature HALT to the Bulk-Out endpoint
 390          *
 391          * This is done in 3 steps.
 392          *
 393          * If the reset doesn't succeed, the device should be port reset.
 394          *
 395          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
 396          */
 397         debug("BBB_reset\n");
 398         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 399                                  US_BBB_RESET,
 400                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 401                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
 402
 403         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 404                 debug("RESET:stall\n");
 405                 return -1;
 406         }
 407
 408         /* long wait for reset */
 409         mdelay(150);
 410         debug("BBB_reset result %d: status %lX reset\n",
 411               result, us->pusb_dev->status);
 412         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 413         result = usb_clear_halt(us->pusb_dev, pipe);
 414         /* long wait for reset */
 415         mdelay(150);
 416         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
 417               result, us->pusb_dev->status);
 418         /* long wait for reset */
 419         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 420         result = usb_clear_halt(us->pusb_dev, pipe);
 421         mdelay(150);
 422         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
 423               result, us->pusb_dev->status);
 424         debug("BBB_reset done\n");
 425         return 0;
 426 }
 427
 428 /* FIXME: this reset function doesn't really reset the port, and it
 429  * should. Actually it should probably do what it's doing here, and
 430  * reset the port physically
 431  */
 432 static int usb_stor_CB_reset(struct us_data *us)
 433 {
 434         unsigned char cmd[12];
 435         int result;
 436
 437         debug("CB_reset\n");
 438         memset(cmd, 0xff, sizeof(cmd));
 439         cmd[0] = SCSI_SEND_DIAG;
 440         cmd[1] = 4;
 441         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 442                                  US_CBI_ADSC,
 443                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 444                                  0, us->ifnum, cmd, sizeof(cmd),
 445                                  USB_CNTL_TIMEOUT * 5);
 446
 447         /* long wait for reset */
 448         mdelay(1500);
 449         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
 450               result, us->pusb_dev->status);
 451         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 452         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 453
 454         debug("CB_reset done\n");
 455         return 0;
 456 }
 457
 458 /*
 459  * Set up the command for a BBB device. Note that the actual SCSI
 460  * command is copied into cbw.CBWCDB.
 461  */
 462 static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
 463 {
 464         int result;
 465         int actlen;
 466         int dir_in;
 467         unsigned int pipe;
 468         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_cbw, cbw, 1);
 469
 470         dir_in = US_DIRECTION(srb->cmd[0]);
 471
 472 #ifdef BBB_COMDAT_TRACE
 473         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
 474                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 475                 srb->pdata);
 476         if (srb->cmdlen) {
 477                 for (result = 0; result < srb->cmdlen; result++)
 478                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 479                 printf("\n");
 480         }
 481 #endif
 482         /* sanity checks */
 483         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 484                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
 485                 return -1;
 486         }
 487
 488         /* always OUT to the ep */
 489         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 490
 491         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 492         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 493         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 494         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 495         cbw->bCBWLUN = srb->lun;
 496         cbw->bCDBLength = srb->cmdlen;
 497         /* copy the command data into the CBW command data buffer */
 498         /* DST SRC LEN!!! */
 499
 500         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 501         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 502                               &actlen, USB_CNTL_TIMEOUT * 5);
 503         if (result < 0)
 504                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 505         return result;
 506 }
 507
 508 /* FIXME: we also need a CBI_command which sets up the completion
 509  * interrupt, and waits for it
 510  */
 511 static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 512 {
 513         int result = 0;
 514         int dir_in, retry;
 515         unsigned int pipe;
 516         unsigned long status;
 517
 518         retry = 5;
 519         dir_in = US_DIRECTION(srb->cmd[0]);
 520
 521         if (dir_in)
 522                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 523         else
 524                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 525
 526         while (retry--) {
 527                 debug("CBI gets a command: Try %d\n", 5 - retry);
 528 #ifdef DEBUG
 529                 usb_show_srb(srb);
 530 #endif
 531                 /* let's send the command via the control pipe */
 532                 result = usb_control_msg(us->pusb_dev,
 533                                          usb_sndctrlpipe(us->pusb_dev , 0),
 534                                          US_CBI_ADSC,
 535                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 536                                          0, us->ifnum,
 537                                          srb->cmd, srb->cmdlen,
 538                                          USB_CNTL_TIMEOUT * 5);
 539                 debug("CB_transport: control msg returned %d, status %lX\n",
 540                       result, us->pusb_dev->status);
 541                 /* check the return code for the command */
 542                 if (result < 0) {
 543                         if (us->pusb_dev->status & USB_ST_STALLED) {
 544                                 status = us->pusb_dev->status;
 545                                 debug(" stall during command found," \
 546                                       " clear pipe\n");
 547                                 usb_clear_halt(us->pusb_dev,
 548                                               usb_sndctrlpipe(us->pusb_dev, 0));
 549                                 us->pusb_dev->status = status;
 550                         }
 551                         debug(" error during command %02X" \
 552                               " Stat = %lX\n", srb->cmd[0],
 553                               us->pusb_dev->status);
 554                         return result;
 555                 }
 556                 /* transfer the data payload for this command, if one exists*/
 557
 558                 debug("CB_transport: control msg returned %d," \
 559                       " direction is %s to go 0x%lx\n", result,
 560                       dir_in ? "IN" : "OUT", srb->datalen);
 561                 if (srb->datalen) {
 562                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 563                                                  srb->datalen);
 564                         debug("CBI attempted to transfer data," \
 565                               " result is %d status %lX, len %d\n",
 566                               result, us->pusb_dev->status,
 567                                 us->pusb_dev->act_len);
 568                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 569                                 break;
 570                 } /* if (srb->datalen) */
 571                 else
 572                         break;
 573         }
 574         /* return result */
 575
 576         return result;
 577 }
 578
 579
 580 static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 581 {
 582         int timeout;
 583
 584         us->ip_wanted = 1;
 585         submit_int_msg(us->pusb_dev, us->irqpipe,
 586                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 587         timeout = 1000;
 588         while (timeout--) {
 589                 if (us->ip_wanted == 0)
 590                         break;
 591                 mdelay(10);
 592         }
 593         if (us->ip_wanted) {
 594                 printf("        Did not get interrupt on CBI\n");
 595                 us->ip_wanted = 0;
 596                 return USB_STOR_TRANSPORT_ERROR;
 597         }
 598         debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
 599               us->ip_data, us->pusb_dev->irq_act_len,
 600               us->pusb_dev->irq_status);
 601         /* UFI gives us ASC and ASCQ, like a request sense */
 602         if (us->subclass == US_SC_UFI) {
 603                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 604                     srb->cmd[0] == SCSI_INQUIRY)
 605                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 606                 else if (us->ip_data)
 607                         return USB_STOR_TRANSPORT_FAILED;
 608                 else
 609                         return USB_STOR_TRANSPORT_GOOD;
 610         }
 611         /* otherwise, we interpret the data normally */
 612         switch (us->ip_data) {
 613         case 0x0001:
 614                 return USB_STOR_TRANSPORT_GOOD;
 615         case 0x0002:
 616                 return USB_STOR_TRANSPORT_FAILED;
 617         default:
 618                 return USB_STOR_TRANSPORT_ERROR;
 619         }                       /* switch */
 620         return USB_STOR_TRANSPORT_ERROR;
 621 }
 622
 623 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 624 #define USB_TRANSPORT_NOT_READY_RETRY 10
 625
 626 /* clear a stall on an endpoint - special for BBB devices */
 627 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 628 {
 629         int result;
 630
 631         /* ENDPOINT_HALT = 0, so set value to 0 */
 632         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 633                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
 634                                 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 635         return result;
 636 }
 637
 638 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
 639 {
 640         int result, retry;
 641         int dir_in;
 642         int actlen, data_actlen;
 643         unsigned int pipe, pipein, pipeout;
 644         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_csw, csw, 1);
 645 #ifdef BBB_XPORT_TRACE
 646         unsigned char *ptr;
 647         int index;
 648 #endif
 649
 650         dir_in = US_DIRECTION(srb->cmd[0]);
 651
 652         /* COMMAND phase */
 653         debug("COMMAND phase\n");
 654         result = usb_stor_BBB_comdat(srb, us);
 655         if (result < 0) {
 656                 debug("failed to send CBW status %ld\n",
 657                       us->pusb_dev->status);
 658                 usb_stor_BBB_reset(us);
 659                 return USB_STOR_TRANSPORT_FAILED;
 660         }
 661         if (!(us->flags & USB_READY))
 662                 mdelay(5);
 663         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 664         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 665         /* DATA phase + error handling */
 666         data_actlen = 0;
 667         /* no data, go immediately to the STATUS phase */
 668         if (srb->datalen == 0)
 669                 goto st;
 670         debug("DATA phase\n");
 671         if (dir_in)
 672                 pipe = pipein;
 673         else
 674                 pipe = pipeout;
 675
 676         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 677                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 678         /* special handling of STALL in DATA phase */
 679         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 680                 debug("DATA:stall\n");
 681                 /* clear the STALL on the endpoint */
 682                 result = usb_stor_BBB_clear_endpt_stall(us,
 683                                         dir_in ? us->ep_in : us->ep_out);
 684                 if (result >= 0)
 685                         /* continue on to STATUS phase */
 686                         goto st;
 687         }
 688         if (result < 0) {
 689                 debug("usb_bulk_msg error status %ld\n",
 690                       us->pusb_dev->status);
 691                 usb_stor_BBB_reset(us);
 692                 return USB_STOR_TRANSPORT_FAILED;
 693         }
 694 #ifdef BBB_XPORT_TRACE
 695         for (index = 0; index < data_actlen; index++)
 696                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 697         printf("\n");
 698 #endif
 699         /* STATUS phase + error handling */
 700 st:
 701         retry = 0;
 702 again:
 703         debug("STATUS phase\n");
 704         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 705                                 &actlen, USB_CNTL_TIMEOUT*5);
 706
 707         /* special handling of STALL in STATUS phase */
 708         if ((result < 0) && (retry < 1) &&
 709             (us->pusb_dev->status & USB_ST_STALLED)) {
 710                 debug("STATUS:stall\n");
 711                 /* clear the STALL on the endpoint */
 712                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 713                 if (result >= 0 && (retry++ < 1))
 714                         /* do a retry */
 715                         goto again;
 716         }
 717         if (result < 0) {
 718                 debug("usb_bulk_msg error status %ld\n",
 719                       us->pusb_dev->status);
 720                 usb_stor_BBB_reset(us);
 721                 return USB_STOR_TRANSPORT_FAILED;
 722         }
 723 #ifdef BBB_XPORT_TRACE
 724         ptr = (unsigned char *)csw;
 725         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 726                 printf("ptr[%d] %#x ", index, ptr[index]);
 727         printf("\n");
 728 #endif
 729         /* misuse pipe to get the residue */
 730         pipe = le32_to_cpu(csw->dCSWDataResidue);
 731         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 732                 pipe = srb->datalen - data_actlen;
 733         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 734                 debug("!CSWSIGNATURE\n");
 735                 usb_stor_BBB_reset(us);
 736                 return USB_STOR_TRANSPORT_FAILED;
 737         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 738                 debug("!Tag\n");
 739                 usb_stor_BBB_reset(us);
 740                 return USB_STOR_TRANSPORT_FAILED;
 741         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 742                 debug(">PHASE\n");
 743                 usb_stor_BBB_reset(us);
 744                 return USB_STOR_TRANSPORT_FAILED;
 745         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 746                 debug("=PHASE\n");
 747                 usb_stor_BBB_reset(us);
 748                 return USB_STOR_TRANSPORT_FAILED;
 749         } else if (data_actlen > srb->datalen) {
 750                 debug("transferred %dB instead of %ldB\n",
 751                       data_actlen, srb->datalen);
 752                 return USB_STOR_TRANSPORT_FAILED;
 753         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 754                 debug("FAILED\n");
 755                 return USB_STOR_TRANSPORT_FAILED;
 756         }
 757
 758         return result;
 759 }
 760
 761 static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 762 {
 763         int result, status;
 764         ccb *psrb;
 765         ccb reqsrb;
 766         int retry, notready;
 767
 768         psrb = &reqsrb;
 769         status = USB_STOR_TRANSPORT_GOOD;
 770         retry = 0;
 771         notready = 0;
 772         /* issue the command */
 773 do_retry:
 774         result = usb_stor_CB_comdat(srb, us);
 775         debug("command / Data returned %d, status %lX\n",
 776               result, us->pusb_dev->status);
 777         /* if this is an CBI Protocol, get IRQ */
 778         if (us->protocol == US_PR_CBI) {
 779                 status = usb_stor_CBI_get_status(srb, us);
 780                 /* if the status is error, report it */
 781                 if (status == USB_STOR_TRANSPORT_ERROR) {
 782                         debug(" USB CBI Command Error\n");
 783                         return status;
 784                 }
 785                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 786                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 787                 if (!us->ip_data) {
 788                         /* if the status is good, report it */
 789                         if (status == USB_STOR_TRANSPORT_GOOD) {
 790                                 debug(" USB CBI Command Good\n");
 791                                 return status;
 792                         }
 793                 }
 794         }
 795         /* do we have to issue an auto request? */
 796         /* HERE we have to check the result */
 797         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 798                 debug("ERROR %lX\n", us->pusb_dev->status);
 799                 us->transport_reset(us);
 800                 return USB_STOR_TRANSPORT_ERROR;
 801         }
 802         if ((us->protocol == US_PR_CBI) &&
 803             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 804             (srb->cmd[0] == SCSI_INQUIRY))) {
 805                 /* do not issue an autorequest after request sense */
 806                 debug("No auto request and good\n");
 807                 return USB_STOR_TRANSPORT_GOOD;
 808         }
 809         /* issue an request_sense */
 810         memset(&psrb->cmd[0], 0, 12);
 811         psrb->cmd[0] = SCSI_REQ_SENSE;
 812         psrb->cmd[1] = srb->lun << 5;
 813         psrb->cmd[4] = 18;
 814         psrb->datalen = 18;
 815         psrb->pdata = &srb->sense_buf[0];
 816         psrb->cmdlen = 12;
 817         /* issue the command */
 818         result = usb_stor_CB_comdat(psrb, us);
 819         debug("auto request returned %d\n", result);
 820         /* if this is an CBI Protocol, get IRQ */
 821         if (us->protocol == US_PR_CBI)
 822                 status = usb_stor_CBI_get_status(psrb, us);
 823
 824         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 825                 debug(" AUTO REQUEST ERROR %ld\n",
 826                       us->pusb_dev->status);
 827                 return USB_STOR_TRANSPORT_ERROR;
 828         }
 829         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 830               srb->sense_buf[0], srb->sense_buf[2],
 831               srb->sense_buf[12], srb->sense_buf[13]);
 832         /* Check the auto request result */
 833         if ((srb->sense_buf[2] == 0) &&
 834             (srb->sense_buf[12] == 0) &&
 835             (srb->sense_buf[13] == 0)) {
 836                 /* ok, no sense */
 837                 return USB_STOR_TRANSPORT_GOOD;
 838         }
 839
 840         /* Check the auto request result */
 841         switch (srb->sense_buf[2]) {
 842         case 0x01:
 843                 /* Recovered Error */
 844                 return USB_STOR_TRANSPORT_GOOD;
 845                 break;
 846         case 0x02:
 847                 /* Not Ready */
 848                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 849                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 850                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 851                                 srb->sense_buf[0], srb->sense_buf[2],
 852                                 srb->sense_buf[12], srb->sense_buf[13]);
 853                         return USB_STOR_TRANSPORT_FAILED;
 854                 } else {
 855                         mdelay(100);
 856                         goto do_retry;
 857                 }
 858                 break;
 859         default:
 860                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 861                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 862                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 863                                 srb->sense_buf[2], srb->sense_buf[12],
 864                                 srb->sense_buf[13]);
 865                         return USB_STOR_TRANSPORT_FAILED;
 866                 } else
 867                         goto do_retry;
 868                 break;
 869         }
 870         return USB_STOR_TRANSPORT_FAILED;
 871 }
 872
 873
 874 static int usb_inquiry(ccb *srb, struct us_data *ss)
 875 {
 876         int retry, i;
 877         retry = 5;
 878         do {
 879                 memset(&srb->cmd[0], 0, 12);
 880                 srb->cmd[0] = SCSI_INQUIRY;
 881                 srb->cmd[1] = srb->lun << 5;
 882                 srb->cmd[4] = 36;
 883                 srb->datalen = 36;
 884                 srb->cmdlen = 12;
 885                 i = ss->transport(srb, ss);
 886                 debug("inquiry returns %d\n", i);
 887                 if (i == 0)
 888                         break;
 889         } while (--retry);
 890
 891         if (!retry) {
 892                 printf("error in inquiry\n");
 893                 return -1;
 894         }
 895         return 0;
 896 }
 897
 898 static int usb_request_sense(ccb *srb, struct us_data *ss)
 899 {
 900         char *ptr;
 901
 902         ptr = (char *)srb->pdata;
 903         memset(&srb->cmd[0], 0, 12);
 904         srb->cmd[0] = SCSI_REQ_SENSE;
 905         srb->cmd[1] = srb->lun << 5;
 906         srb->cmd[4] = 18;
 907         srb->datalen = 18;
 908         srb->pdata = &srb->sense_buf[0];
 909         srb->cmdlen = 12;
 910         ss->transport(srb, ss);
 911         debug("Request Sense returned %02X %02X %02X\n",
 912               srb->sense_buf[2], srb->sense_buf[12],
 913               srb->sense_buf[13]);
 914         srb->pdata = (uchar *)ptr;
 915         return 0;
 916 }
 917
 918 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
 919 {
 920         int retries = 10;
 921
 922         do {
 923                 memset(&srb->cmd[0], 0, 12);
 924                 srb->cmd[0] = SCSI_TST_U_RDY;
 925                 srb->cmd[1] = srb->lun << 5;
 926                 srb->datalen = 0;
 927                 srb->cmdlen = 12;
 928                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
 929                         ss->flags |= USB_READY;
 930                         return 0;
 931                 }
 932                 usb_request_sense(srb, ss);
 933                 /*
 934                  * Check the Key Code Qualifier, if it matches
 935                  * "Not Ready - medium not present"
 936                  * (the sense Key equals 0x2 and the ASC is 0x3a)
 937                  * return immediately as the medium being absent won't change
 938                  * unless there is a user action.
 939                  */
 940                 if ((srb->sense_buf[2] == 0x02) &&
 941                     (srb->sense_buf[12] == 0x3a))
 942                         return -1;
 943                 mdelay(100);
 944         } while (retries--);
 945
 946         return -1;
 947 }
 948
 949 static int usb_read_capacity(ccb *srb, struct us_data *ss)
 950 {
 951         int retry;
 952         /* XXX retries */
 953         retry = 3;
 954         do {
 955                 memset(&srb->cmd[0], 0, 12);
 956                 srb->cmd[0] = SCSI_RD_CAPAC;
 957                 srb->cmd[1] = srb->lun << 5;
 958                 srb->datalen = 8;
 959                 srb->cmdlen = 12;
 960                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 961                         return 0;
 962         } while (retry--);
 963
 964         return -1;
 965 }
 966
 967 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
 968                        unsigned short blocks)
 969 {
 970         memset(&srb->cmd[0], 0, 12);
 971         srb->cmd[0] = SCSI_READ10;
 972         srb->cmd[1] = srb->lun << 5;
 973         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 974         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 975         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 976         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 977         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 978         srb->cmd[8] = (unsigned char) blocks & 0xff;
 979         srb->cmdlen = 12;
 980         debug("read10: start %lx blocks %x\n", start, blocks);
 981         return ss->transport(srb, ss);
 982 }
 983
 984 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
 985                         unsigned short blocks)
 986 {
 987         memset(&srb->cmd[0], 0, 12);
 988         srb->cmd[0] = SCSI_WRITE10;
 989         srb->cmd[1] = srb->lun << 5;
 990         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 991         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 992         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 993         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 994         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 995         srb->cmd[8] = (unsigned char) blocks & 0xff;
 996         srb->cmdlen = 12;
 997         debug("write10: start %lx blocks %x\n", start, blocks);
 998         return ss->transport(srb, ss);
 999 }
1000
1001
1002 #ifdef CONFIG_USB_BIN_FIXUP
1003 /*
1004  * Some USB storage devices queried for SCSI identification data respond with
1005  * binary strings, which if output to the console freeze the terminal. The
1006  * workaround is to modify the vendor and product strings read from such
1007  * device with proper values (as reported by 'usb info').
1008  *
1009  * Vendor and product length limits are taken from the definition of
1010  * block_dev_desc_t in include/part.h.
1011  */
1012 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1013                                 unsigned char vendor[],
1014                                 unsigned char product[]) {
1015         const unsigned char max_vendor_len = 40;
1016         const unsigned char max_product_len = 20;
1017         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1018                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1019                 strncpy((char *)product, "Flash Media Cntrller",
1020                         max_product_len);
1021         }
1022 }
1023 #endif /* CONFIG_USB_BIN_FIXUP */
1024
1025 unsigned long usb_stor_read(int device, lbaint_t blknr,
1026                             lbaint_t blkcnt, void *buffer)
1027 {
1028         lbaint_t start, blks;
1029         uintptr_t buf_addr;
1030         unsigned short smallblks;
1031         struct usb_device *dev;
1032         struct us_data *ss;
1033         int retry;
1034         ccb *srb = &usb_ccb;
1035
1036         if (blkcnt == 0)
1037                 return 0;
1038
1039         device &= 0xff;
1040         /* Setup  device */
1041         debug("\nusb_read: dev %d\n", device);
1042         dev = usb_dev_desc[device].priv;
1043         if (!dev) {
1044                 debug("%s: No device\n", __func__);
1045                 return 0;
1046         }
1047         ss = (struct us_data *)dev->privptr;
1048
1049         usb_disable_asynch(1); /* asynch transfer not allowed */
1050         srb->lun = usb_dev_desc[device].lun;
1051         buf_addr = (uintptr_t)buffer;
1052         start = blknr;
1053         blks = blkcnt;
1054
1055         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
1056               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1057
1058         do {
1059                 /* XXX need some comment here */
1060                 retry = 2;
1061                 srb->pdata = (unsigned char *)buf_addr;
1062                 if (blks > USB_MAX_XFER_BLK)
1063                         smallblks = USB_MAX_XFER_BLK;
1064                 else
1065                         smallblks = (unsigned short) blks;
1066 retry_it:
1067                 if (smallblks == USB_MAX_XFER_BLK)
1068                         usb_show_progress();
1069                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1070                 srb->pdata = (unsigned char *)buf_addr;
1071                 if (usb_read_10(srb, ss, start, smallblks)) {
1072                         debug("Read ERROR\n");
1073                         usb_request_sense(srb, ss);
1074                         if (retry--)
1075                                 goto retry_it;
1076                         blkcnt -= blks;
1077                         break;
1078                 }
1079                 start += smallblks;
1080                 blks -= smallblks;
1081                 buf_addr += srb->datalen;
1082         } while (blks != 0);
1083         ss->flags &= ~USB_READY;
1084
1085         debug("usb_read: end startblk " LBAF
1086               ", blccnt %x buffer %" PRIxPTR "\n",
1087               start, smallblks, buf_addr);
1088
1089         usb_disable_asynch(0); /* asynch transfer allowed */
1090         if (blkcnt >= USB_MAX_XFER_BLK)
1091                 debug("\n");
1092         return blkcnt;
1093 }
1094
1095 unsigned long usb_stor_write(int device, lbaint_t blknr,
1096                                 lbaint_t blkcnt, const void *buffer)
1097 {
1098         lbaint_t start, blks;
1099         uintptr_t buf_addr;
1100         unsigned short smallblks;
1101         struct usb_device *dev;
1102         struct us_data *ss;
1103         int retry;
1104         ccb *srb = &usb_ccb;
1105
1106         if (blkcnt == 0)
1107                 return 0;
1108
1109         device &= 0xff;
1110         /* Setup  device */
1111         debug("\nusb_write: dev %d\n", device);
1112         dev = usb_dev_desc[device].priv;
1113         if (!dev)
1114                 return 0;
1115         ss = (struct us_data *)dev->privptr;
1116
1117         usb_disable_asynch(1); /* asynch transfer not allowed */
1118
1119         srb->lun = usb_dev_desc[device].lun;
1120         buf_addr = (uintptr_t)buffer;
1121         start = blknr;
1122         blks = blkcnt;
1123
1124         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
1125               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1126
1127         do {
1128                 /* If write fails retry for max retry count else
1129                  * return with number of blocks written successfully.
1130                  */
1131                 retry = 2;
1132                 srb->pdata = (unsigned char *)buf_addr;
1133                 if (blks > USB_MAX_XFER_BLK)
1134                         smallblks = USB_MAX_XFER_BLK;
1135                 else
1136                         smallblks = (unsigned short) blks;
1137 retry_it:
1138                 if (smallblks == USB_MAX_XFER_BLK)
1139                         usb_show_progress();
1140                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1141                 srb->pdata = (unsigned char *)buf_addr;
1142                 if (usb_write_10(srb, ss, start, smallblks)) {
1143                         debug("Write ERROR\n");
1144                         usb_request_sense(srb, ss);
1145                         if (retry--)
1146                                 goto retry_it;
1147                         blkcnt -= blks;
1148                         break;
1149                 }
1150                 start += smallblks;
1151                 blks -= smallblks;
1152                 buf_addr += srb->datalen;
1153         } while (blks != 0);
1154         ss->flags &= ~USB_READY;
1155
1156         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1157               PRIxPTR "\n", start, smallblks, buf_addr);
1158
1159         usb_disable_asynch(0); /* asynch transfer allowed */
1160         if (blkcnt >= USB_MAX_XFER_BLK)
1161                 debug("\n");
1162         return blkcnt;
1163
1164 }
1165
1166 /* Probe to see if a new device is actually a Storage device */
1167 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1168                       struct us_data *ss)
1169 {
1170         struct usb_interface *iface;
1171         int i;
1172         struct usb_endpoint_descriptor *ep_desc;
1173         unsigned int flags = 0;
1174
1175         int protocol = 0;
1176         int subclass = 0;
1177
1178         /* let's examine the device now */
1179         iface = &dev->config.if_desc[ifnum];
1180
1181 #if 0
1182         /* this is the place to patch some storage devices */
1183         debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1184                         dev->descriptor.idProduct);
1185
1186         if ((dev->descriptor.idVendor) == 0x066b &&
1187             (dev->descriptor.idProduct) == 0x0103) {
1188                 debug("patched for E-USB\n");
1189                 protocol = US_PR_CB;
1190                 subclass = US_SC_UFI;       /* an assumption */
1191         }
1192 #endif
1193
1194         if (dev->descriptor.bDeviceClass != 0 ||
1195                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1196                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1197                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1198                 debug("Not mass storage\n");
1199                 /* if it's not a mass storage, we go no further */
1200                 return 0;
1201         }
1202
1203         memset(ss, 0, sizeof(struct us_data));
1204
1205         /* At this point, we know we've got a live one */
1206         debug("\n\nUSB Mass Storage device detected\n");
1207
1208         /* Initialize the us_data structure with some useful info */
1209         ss->flags = flags;
1210         ss->ifnum = ifnum;
1211         ss->pusb_dev = dev;
1212         ss->attention_done = 0;
1213
1214         /* If the device has subclass and protocol, then use that.  Otherwise,
1215          * take data from the specific interface.
1216          */
1217         if (subclass) {
1218                 ss->subclass = subclass;
1219                 ss->protocol = protocol;
1220         } else {
1221                 ss->subclass = iface->desc.bInterfaceSubClass;
1222                 ss->protocol = iface->desc.bInterfaceProtocol;
1223         }
1224
1225         /* set the handler pointers based on the protocol */
1226         debug("Transport: ");
1227         switch (ss->protocol) {
1228         case US_PR_CB:
1229                 debug("Control/Bulk\n");
1230                 ss->transport = usb_stor_CB_transport;
1231                 ss->transport_reset = usb_stor_CB_reset;
1232                 break;
1233
1234         case US_PR_CBI:
1235                 debug("Control/Bulk/Interrupt\n");
1236                 ss->transport = usb_stor_CB_transport;
1237                 ss->transport_reset = usb_stor_CB_reset;
1238                 break;
1239         case US_PR_BULK:
1240                 debug("Bulk/Bulk/Bulk\n");
1241                 ss->transport = usb_stor_BBB_transport;
1242                 ss->transport_reset = usb_stor_BBB_reset;
1243                 break;
1244         default:
1245                 printf("USB Storage Transport unknown / not yet implemented\n");
1246                 return 0;
1247                 break;
1248         }
1249
1250         /*
1251          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1252          * An optional interrupt is OK (necessary for CBI protocol).
1253          * We will ignore any others.
1254          */
1255         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1256                 ep_desc = &iface->ep_desc[i];
1257                 /* is it an BULK endpoint? */
1258                 if ((ep_desc->bmAttributes &
1259                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1260                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1261                                 ss->ep_in = ep_desc->bEndpointAddress &
1262                                                 USB_ENDPOINT_NUMBER_MASK;
1263                         else
1264                                 ss->ep_out =
1265                                         ep_desc->bEndpointAddress &
1266                                         USB_ENDPOINT_NUMBER_MASK;
1267                 }
1268
1269                 /* is it an interrupt endpoint? */
1270                 if ((ep_desc->bmAttributes &
1271                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1272                         ss->ep_int = ep_desc->bEndpointAddress &
1273                                                 USB_ENDPOINT_NUMBER_MASK;
1274                         ss->irqinterval = ep_desc->bInterval;
1275                 }
1276         }
1277         debug("Endpoints In %d Out %d Int %d\n",
1278               ss->ep_in, ss->ep_out, ss->ep_int);
1279
1280         /* Do some basic sanity checks, and bail if we find a problem */
1281         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1282             !ss->ep_in || !ss->ep_out ||
1283             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1284                 debug("Problems with device\n");
1285                 return 0;
1286         }
1287         /* set class specific stuff */
1288         /* We only handle certain protocols.  Currently, these are
1289          * the only ones.
1290          * The SFF8070 accepts the requests used in u-boot
1291          */
1292         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1293             ss->subclass != US_SC_8070) {
1294                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1295                 return 0;
1296         }
1297         if (ss->ep_int) {
1298                 /* we had found an interrupt endpoint, prepare irq pipe
1299                  * set up the IRQ pipe and handler
1300                  */
1301                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1302                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1303                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1304                 dev->irq_handle = usb_stor_irq;
1305         }
1306         dev->privptr = (void *)ss;
1307         return 1;
1308 }
1309
1310 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1311                       block_dev_desc_t *dev_desc)
1312 {
1313         unsigned char perq, modi;
1314         ALLOC_CACHE_ALIGN_BUFFER(u32, cap, 2);
1315         ALLOC_CACHE_ALIGN_BUFFER(u8, usb_stor_buf, 36);
1316         u32 capacity, blksz;
1317         ccb *pccb = &usb_ccb;
1318
1319         pccb->pdata = usb_stor_buf;
1320
1321         dev_desc->target = dev->devnum;
1322         pccb->lun = dev_desc->lun;
1323         debug(" address %d\n", dev_desc->target);
1324
1325         if (usb_inquiry(pccb, ss)) {
1326                 debug("%s: usb_inquiry() failed\n", __func__);
1327                 return -1;
1328         }
1329
1330         perq = usb_stor_buf[0];
1331         modi = usb_stor_buf[1];
1332
1333         /*
1334          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1335          * they would not respond to test_unit_ready .
1336          */
1337         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1338                 debug("%s: unknown/unsupported device\n", __func__);
1339                 return 0;
1340         }
1341         if ((modi&0x80) == 0x80) {
1342                 /* drive is removable */
1343                 dev_desc->removable = 1;
1344         }
1345         memcpy(dev_desc->vendor, (const void *)&usb_stor_buf[8], 8);
1346         memcpy(dev_desc->product, (const void *)&usb_stor_buf[16], 16);
1347         memcpy(dev_desc->revision, (const void *)&usb_stor_buf[32], 4);
1348         dev_desc->vendor[8] = 0;
1349         dev_desc->product[16] = 0;
1350         dev_desc->revision[4] = 0;
1351 #ifdef CONFIG_USB_BIN_FIXUP
1352         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1353                       (uchar *)dev_desc->product);
1354 #endif /* CONFIG_USB_BIN_FIXUP */
1355         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1356               usb_stor_buf[3]);
1357         if (usb_test_unit_ready(pccb, ss)) {
1358                 printf("Device NOT ready\n"
1359                        "   Request Sense returned %02X %02X %02X\n",
1360                        pccb->sense_buf[2], pccb->sense_buf[12],
1361                        pccb->sense_buf[13]);
1362                 if (dev_desc->removable == 1) {
1363                         dev_desc->type = perq;
1364                         return 1;
1365                 }
1366                 return 0;
1367         }
1368         pccb->pdata = (unsigned char *)cap;
1369         memset(pccb->pdata, 0, 8);
1370         if (usb_read_capacity(pccb, ss) != 0) {
1371                 printf("READ_CAP ERROR\n");
1372                 cap[0] = 2880;
1373                 cap[1] = 0x200;
1374         }
1375         ss->flags &= ~USB_READY;
1376         debug("Read Capacity returns: 0x%08x, 0x%08x\n", cap[0], cap[1]);
1377 #if 0
1378         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1379                 cap[0] >>= 16;
1380
1381         cap[0] = cpu_to_be32(cap[0]);
1382         cap[1] = cpu_to_be32(cap[1]);
1383 #endif
1384
1385         capacity = be32_to_cpu(cap[0]) + 1;
1386         blksz = be32_to_cpu(cap[1]);
1387
1388         debug("Capacity = 0x%08x, blocksz = 0x%08x\n", capacity, blksz);
1389         dev_desc->lba = capacity;
1390         dev_desc->blksz = blksz;
1391         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1392         dev_desc->type = perq;
1393         debug(" address %d\n", dev_desc->target);
1394         debug("partype: %d\n", dev_desc->part_type);
1395
1396         init_part(dev_desc);
1397
1398         debug("partype: %d\n", dev_desc->part_type);
1399         return 1;
1400 }