git.sur5r.net Git - u-boot/blob - 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 /*******************************************************************************
 172  * scan the usb and reports device info
 173  * to the user if mode = 1
 174  * returns current device or -1 if no
 175  */
 176 int usb_stor_scan(int mode)
 177 {
 178         unsigned char i;
 179         struct usb_device *dev;
 180
 181         if (mode == 1)
 182                 printf("       scanning usb for storage devices... ");
 183
 184         usb_disable_asynch(1); /* asynch transfer not allowed */
 185
 186         for (i = 0; i < USB_MAX_STOR_DEV; i++) {
 187                 memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
 188                 usb_dev_desc[i].if_type = IF_TYPE_USB;
 189                 usb_dev_desc[i].dev = i;
 190                 usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
 191                 usb_dev_desc[i].target = 0xff;
 192                 usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
 193                 usb_dev_desc[i].block_read = usb_stor_read;
 194                 usb_dev_desc[i].block_write = usb_stor_write;
 195         }
 196
 197         usb_max_devs = 0;
 198         for (i = 0; i < USB_MAX_DEVICE; i++) {
 199                 dev = usb_get_dev_index(i); /* get device */
 200                 debug("i=%d\n", i);
 201                 if (dev == NULL)
 202                         break; /* no more devices available */
 203
 204                 if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
 205                         /* OK, it's a storage device.  Iterate over its LUNs
 206                          * and populate `usb_dev_desc'.
 207                          */
 208                         int lun, max_lun, start = usb_max_devs;
 209
 210                         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 211                         for (lun = 0;
 212                              lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
 213                              lun++) {
 214                                 usb_dev_desc[usb_max_devs].lun = lun;
 215                                 if (usb_stor_get_info(dev, &usb_stor[start],
 216                                     &usb_dev_desc[usb_max_devs]) == 1) {
 217                                         usb_max_devs++;
 218                                 }
 219                         }
 220                 }
 221                 /* if storage device */
 222                 if (usb_max_devs == USB_MAX_STOR_DEV) {
 223                         printf("max USB Storage Device reached: %d stopping\n",
 224                                 usb_max_devs);
 225                         break;
 226                 }
 227         } /* for */
 228
 229         usb_disable_asynch(0); /* asynch transfer allowed */
 230         printf("%d Storage Device(s) found\n", usb_max_devs);
 231         if (usb_max_devs > 0)
 232                 return 0;
 233         return -1;
 234 }
 235
 236 static int usb_stor_irq(struct usb_device *dev)
 237 {
 238         struct us_data *us;
 239         us = (struct us_data *)dev->privptr;
 240
 241         if (us->ip_wanted)
 242                 us->ip_wanted = 0;
 243         return 0;
 244 }
 245
 246
 247 #ifdef  DEBUG
 248
 249 static void usb_show_srb(ccb *pccb)
 250 {
 251         int i;
 252         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
 253         for (i = 0; i < 12; i++)
 254                 printf("%02X ", pccb->cmd[i]);
 255         printf("\n");
 256 }
 257
 258 static void display_int_status(unsigned long tmp)
 259 {
 260         printf("Status: %s %s %s %s %s %s %s\n",
 261                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 262                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 263                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 264                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 265                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 266                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 267                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 268 }
 269 #endif
 270 /***********************************************************************
 271  * Data transfer routines
 272  ***********************************************************************/
 273
 274 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 275 {
 276         int max_size;
 277         int this_xfer;
 278         int result;
 279         int partial;
 280         int maxtry;
 281         int stat;
 282
 283         /* determine the maximum packet size for these transfers */
 284         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 285
 286         /* while we have data left to transfer */
 287         while (length) {
 288
 289                 /* calculate how long this will be -- maximum or a remainder */
 290                 this_xfer = length > max_size ? max_size : length;
 291                 length -= this_xfer;
 292
 293                 /* setup the retry counter */
 294                 maxtry = 10;
 295
 296                 /* set up the transfer loop */
 297                 do {
 298                         /* transfer the data */
 299                         debug("Bulk xfer 0x%lx(%d) try #%d\n",
 300                               (ulong)map_to_sysmem(buf), this_xfer,
 301                               11 - maxtry);
 302                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 303                                               this_xfer, &partial,
 304                                               USB_CNTL_TIMEOUT * 5);
 305                         debug("bulk_msg returned %d xferred %d/%d\n",
 306                               result, partial, this_xfer);
 307                         if (us->pusb_dev->status != 0) {
 308                                 /* if we stall, we need to clear it before
 309                                  * we go on
 310                                  */
 311 #ifdef DEBUG
 312                                 display_int_status(us->pusb_dev->status);
 313 #endif
 314                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 315                                         debug("stalled ->clearing endpoint" \
 316                                               "halt for pipe 0x%x\n", pipe);
 317                                         stat = us->pusb_dev->status;
 318                                         usb_clear_halt(us->pusb_dev, pipe);
 319                                         us->pusb_dev->status = stat;
 320                                         if (this_xfer == partial) {
 321                                                 debug("bulk transferred" \
 322                                                       "with error %lX," \
 323                                                       " but data ok\n",
 324                                                       us->pusb_dev->status);
 325                                                 return 0;
 326                                         }
 327                                         else
 328                                                 return result;
 329                                 }
 330                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 331                                         debug("Device NAKed bulk_msg\n");
 332                                         return result;
 333                                 }
 334                                 debug("bulk transferred with error");
 335                                 if (this_xfer == partial) {
 336                                         debug(" %ld, but data ok\n",
 337                                               us->pusb_dev->status);
 338                                         return 0;
 339                                 }
 340                                 /* if our try counter reaches 0, bail out */
 341                                         debug(" %ld, data %d\n",
 342                                               us->pusb_dev->status, partial);
 343                                 if (!maxtry--)
 344                                                 return result;
 345                         }
 346                         /* update to show what data was transferred */
 347                         this_xfer -= partial;
 348                         buf += partial;
 349                         /* continue until this transfer is done */
 350                 } while (this_xfer);
 351         }
 352
 353         /* if we get here, we're done and successful */
 354         return 0;
 355 }
 356
 357 static int usb_stor_BBB_reset(struct us_data *us)
 358 {
 359         int result;
 360         unsigned int pipe;
 361
 362         /*
 363          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
 364          *
 365          * For Reset Recovery the host shall issue in the following order:
 366          * a) a Bulk-Only Mass Storage Reset
 367          * b) a Clear Feature HALT to the Bulk-In endpoint
 368          * c) a Clear Feature HALT to the Bulk-Out endpoint
 369          *
 370          * This is done in 3 steps.
 371          *
 372          * If the reset doesn't succeed, the device should be port reset.
 373          *
 374          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
 375          */
 376         debug("BBB_reset\n");
 377         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 378                                  US_BBB_RESET,
 379                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 380                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
 381
 382         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 383                 debug("RESET:stall\n");
 384                 return -1;
 385         }
 386
 387         /* long wait for reset */
 388         mdelay(150);
 389         debug("BBB_reset result %d: status %lX reset\n",
 390               result, us->pusb_dev->status);
 391         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 392         result = usb_clear_halt(us->pusb_dev, pipe);
 393         /* long wait for reset */
 394         mdelay(150);
 395         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
 396               result, us->pusb_dev->status);
 397         /* long wait for reset */
 398         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 399         result = usb_clear_halt(us->pusb_dev, pipe);
 400         mdelay(150);
 401         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
 402               result, us->pusb_dev->status);
 403         debug("BBB_reset done\n");
 404         return 0;
 405 }
 406
 407 /* FIXME: this reset function doesn't really reset the port, and it
 408  * should. Actually it should probably do what it's doing here, and
 409  * reset the port physically
 410  */
 411 static int usb_stor_CB_reset(struct us_data *us)
 412 {
 413         unsigned char cmd[12];
 414         int result;
 415
 416         debug("CB_reset\n");
 417         memset(cmd, 0xff, sizeof(cmd));
 418         cmd[0] = SCSI_SEND_DIAG;
 419         cmd[1] = 4;
 420         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 421                                  US_CBI_ADSC,
 422                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 423                                  0, us->ifnum, cmd, sizeof(cmd),
 424                                  USB_CNTL_TIMEOUT * 5);
 425
 426         /* long wait for reset */
 427         mdelay(1500);
 428         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
 429               result, us->pusb_dev->status);
 430         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 431         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 432
 433         debug("CB_reset done\n");
 434         return 0;
 435 }
 436
 437 /*
 438  * Set up the command for a BBB device. Note that the actual SCSI
 439  * command is copied into cbw.CBWCDB.
 440  */
 441 static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
 442 {
 443         int result;
 444         int actlen;
 445         int dir_in;
 446         unsigned int pipe;
 447         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_cbw, cbw, 1);
 448
 449         dir_in = US_DIRECTION(srb->cmd[0]);
 450
 451 #ifdef BBB_COMDAT_TRACE
 452         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
 453                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 454                 srb->pdata);
 455         if (srb->cmdlen) {
 456                 for (result = 0; result < srb->cmdlen; result++)
 457                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 458                 printf("\n");
 459         }
 460 #endif
 461         /* sanity checks */
 462         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 463                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
 464                 return -1;
 465         }
 466
 467         /* always OUT to the ep */
 468         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 469
 470         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 471         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 472         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 473         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 474         cbw->bCBWLUN = srb->lun;
 475         cbw->bCDBLength = srb->cmdlen;
 476         /* copy the command data into the CBW command data buffer */
 477         /* DST SRC LEN!!! */
 478
 479         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 480         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 481                               &actlen, USB_CNTL_TIMEOUT * 5);
 482         if (result < 0)
 483                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 484         return result;
 485 }
 486
 487 /* FIXME: we also need a CBI_command which sets up the completion
 488  * interrupt, and waits for it
 489  */
 490 static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 491 {
 492         int result = 0;
 493         int dir_in, retry;
 494         unsigned int pipe;
 495         unsigned long status;
 496
 497         retry = 5;
 498         dir_in = US_DIRECTION(srb->cmd[0]);
 499
 500         if (dir_in)
 501                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 502         else
 503                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 504
 505         while (retry--) {
 506                 debug("CBI gets a command: Try %d\n", 5 - retry);
 507 #ifdef DEBUG
 508                 usb_show_srb(srb);
 509 #endif
 510                 /* let's send the command via the control pipe */
 511                 result = usb_control_msg(us->pusb_dev,
 512                                          usb_sndctrlpipe(us->pusb_dev , 0),
 513                                          US_CBI_ADSC,
 514                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 515                                          0, us->ifnum,
 516                                          srb->cmd, srb->cmdlen,
 517                                          USB_CNTL_TIMEOUT * 5);
 518                 debug("CB_transport: control msg returned %d, status %lX\n",
 519                       result, us->pusb_dev->status);
 520                 /* check the return code for the command */
 521                 if (result < 0) {
 522                         if (us->pusb_dev->status & USB_ST_STALLED) {
 523                                 status = us->pusb_dev->status;
 524                                 debug(" stall during command found," \
 525                                       " clear pipe\n");
 526                                 usb_clear_halt(us->pusb_dev,
 527                                               usb_sndctrlpipe(us->pusb_dev, 0));
 528                                 us->pusb_dev->status = status;
 529                         }
 530                         debug(" error during command %02X" \
 531                               " Stat = %lX\n", srb->cmd[0],
 532                               us->pusb_dev->status);
 533                         return result;
 534                 }
 535                 /* transfer the data payload for this command, if one exists*/
 536
 537                 debug("CB_transport: control msg returned %d," \
 538                       " direction is %s to go 0x%lx\n", result,
 539                       dir_in ? "IN" : "OUT", srb->datalen);
 540                 if (srb->datalen) {
 541                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 542                                                  srb->datalen);
 543                         debug("CBI attempted to transfer data," \
 544                               " result is %d status %lX, len %d\n",
 545                               result, us->pusb_dev->status,
 546                                 us->pusb_dev->act_len);
 547                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 548                                 break;
 549                 } /* if (srb->datalen) */
 550                 else
 551                         break;
 552         }
 553         /* return result */
 554
 555         return result;
 556 }
 557
 558
 559 static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 560 {
 561         int timeout;
 562
 563         us->ip_wanted = 1;
 564         submit_int_msg(us->pusb_dev, us->irqpipe,
 565                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 566         timeout = 1000;
 567         while (timeout--) {
 568                 if (us->ip_wanted == 0)
 569                         break;
 570                 mdelay(10);
 571         }
 572         if (us->ip_wanted) {
 573                 printf("        Did not get interrupt on CBI\n");
 574                 us->ip_wanted = 0;
 575                 return USB_STOR_TRANSPORT_ERROR;
 576         }
 577         debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
 578               us->ip_data, us->pusb_dev->irq_act_len,
 579               us->pusb_dev->irq_status);
 580         /* UFI gives us ASC and ASCQ, like a request sense */
 581         if (us->subclass == US_SC_UFI) {
 582                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 583                     srb->cmd[0] == SCSI_INQUIRY)
 584                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 585                 else if (us->ip_data)
 586                         return USB_STOR_TRANSPORT_FAILED;
 587                 else
 588                         return USB_STOR_TRANSPORT_GOOD;
 589         }
 590         /* otherwise, we interpret the data normally */
 591         switch (us->ip_data) {
 592         case 0x0001:
 593                 return USB_STOR_TRANSPORT_GOOD;
 594         case 0x0002:
 595                 return USB_STOR_TRANSPORT_FAILED;
 596         default:
 597                 return USB_STOR_TRANSPORT_ERROR;
 598         }                       /* switch */
 599         return USB_STOR_TRANSPORT_ERROR;
 600 }
 601
 602 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 603 #define USB_TRANSPORT_NOT_READY_RETRY 10
 604
 605 /* clear a stall on an endpoint - special for BBB devices */
 606 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 607 {
 608         int result;
 609
 610         /* ENDPOINT_HALT = 0, so set value to 0 */
 611         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 612                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
 613                                 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 614         return result;
 615 }
 616
 617 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
 618 {
 619         int result, retry;
 620         int dir_in;
 621         int actlen, data_actlen;
 622         unsigned int pipe, pipein, pipeout;
 623         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_csw, csw, 1);
 624 #ifdef BBB_XPORT_TRACE
 625         unsigned char *ptr;
 626         int index;
 627 #endif
 628
 629         dir_in = US_DIRECTION(srb->cmd[0]);
 630
 631         /* COMMAND phase */
 632         debug("COMMAND phase\n");
 633         result = usb_stor_BBB_comdat(srb, us);
 634         if (result < 0) {
 635                 debug("failed to send CBW status %ld\n",
 636                       us->pusb_dev->status);
 637                 usb_stor_BBB_reset(us);
 638                 return USB_STOR_TRANSPORT_FAILED;
 639         }
 640         if (!(us->flags & USB_READY))
 641                 mdelay(5);
 642         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 643         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 644         /* DATA phase + error handling */
 645         data_actlen = 0;
 646         /* no data, go immediately to the STATUS phase */
 647         if (srb->datalen == 0)
 648                 goto st;
 649         debug("DATA phase\n");
 650         if (dir_in)
 651                 pipe = pipein;
 652         else
 653                 pipe = pipeout;
 654
 655         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 656                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 657         /* special handling of STALL in DATA phase */
 658         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 659                 debug("DATA:stall\n");
 660                 /* clear the STALL on the endpoint */
 661                 result = usb_stor_BBB_clear_endpt_stall(us,
 662                                         dir_in ? us->ep_in : us->ep_out);
 663                 if (result >= 0)
 664                         /* continue on to STATUS phase */
 665                         goto st;
 666         }
 667         if (result < 0) {
 668                 debug("usb_bulk_msg error status %ld\n",
 669                       us->pusb_dev->status);
 670                 usb_stor_BBB_reset(us);
 671                 return USB_STOR_TRANSPORT_FAILED;
 672         }
 673 #ifdef BBB_XPORT_TRACE
 674         for (index = 0; index < data_actlen; index++)
 675                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 676         printf("\n");
 677 #endif
 678         /* STATUS phase + error handling */
 679 st:
 680         retry = 0;
 681 again:
 682         debug("STATUS phase\n");
 683         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 684                                 &actlen, USB_CNTL_TIMEOUT*5);
 685
 686         /* special handling of STALL in STATUS phase */
 687         if ((result < 0) && (retry < 1) &&
 688             (us->pusb_dev->status & USB_ST_STALLED)) {
 689                 debug("STATUS:stall\n");
 690                 /* clear the STALL on the endpoint */
 691                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 692                 if (result >= 0 && (retry++ < 1))
 693                         /* do a retry */
 694                         goto again;
 695         }
 696         if (result < 0) {
 697                 debug("usb_bulk_msg error status %ld\n",
 698                       us->pusb_dev->status);
 699                 usb_stor_BBB_reset(us);
 700                 return USB_STOR_TRANSPORT_FAILED;
 701         }
 702 #ifdef BBB_XPORT_TRACE
 703         ptr = (unsigned char *)csw;
 704         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 705                 printf("ptr[%d] %#x ", index, ptr[index]);
 706         printf("\n");
 707 #endif
 708         /* misuse pipe to get the residue */
 709         pipe = le32_to_cpu(csw->dCSWDataResidue);
 710         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 711                 pipe = srb->datalen - data_actlen;
 712         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 713                 debug("!CSWSIGNATURE\n");
 714                 usb_stor_BBB_reset(us);
 715                 return USB_STOR_TRANSPORT_FAILED;
 716         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 717                 debug("!Tag\n");
 718                 usb_stor_BBB_reset(us);
 719                 return USB_STOR_TRANSPORT_FAILED;
 720         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 721                 debug(">PHASE\n");
 722                 usb_stor_BBB_reset(us);
 723                 return USB_STOR_TRANSPORT_FAILED;
 724         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 725                 debug("=PHASE\n");
 726                 usb_stor_BBB_reset(us);
 727                 return USB_STOR_TRANSPORT_FAILED;
 728         } else if (data_actlen > srb->datalen) {
 729                 debug("transferred %dB instead of %ldB\n",
 730                       data_actlen, srb->datalen);
 731                 return USB_STOR_TRANSPORT_FAILED;
 732         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 733                 debug("FAILED\n");
 734                 return USB_STOR_TRANSPORT_FAILED;
 735         }
 736
 737         return result;
 738 }
 739
 740 static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 741 {
 742         int result, status;
 743         ccb *psrb;
 744         ccb reqsrb;
 745         int retry, notready;
 746
 747         psrb = &reqsrb;
 748         status = USB_STOR_TRANSPORT_GOOD;
 749         retry = 0;
 750         notready = 0;
 751         /* issue the command */
 752 do_retry:
 753         result = usb_stor_CB_comdat(srb, us);
 754         debug("command / Data returned %d, status %lX\n",
 755               result, us->pusb_dev->status);
 756         /* if this is an CBI Protocol, get IRQ */
 757         if (us->protocol == US_PR_CBI) {
 758                 status = usb_stor_CBI_get_status(srb, us);
 759                 /* if the status is error, report it */
 760                 if (status == USB_STOR_TRANSPORT_ERROR) {
 761                         debug(" USB CBI Command Error\n");
 762                         return status;
 763                 }
 764                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 765                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 766                 if (!us->ip_data) {
 767                         /* if the status is good, report it */
 768                         if (status == USB_STOR_TRANSPORT_GOOD) {
 769                                 debug(" USB CBI Command Good\n");
 770                                 return status;
 771                         }
 772                 }
 773         }
 774         /* do we have to issue an auto request? */
 775         /* HERE we have to check the result */
 776         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 777                 debug("ERROR %lX\n", us->pusb_dev->status);
 778                 us->transport_reset(us);
 779                 return USB_STOR_TRANSPORT_ERROR;
 780         }
 781         if ((us->protocol == US_PR_CBI) &&
 782             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 783             (srb->cmd[0] == SCSI_INQUIRY))) {
 784                 /* do not issue an autorequest after request sense */
 785                 debug("No auto request and good\n");
 786                 return USB_STOR_TRANSPORT_GOOD;
 787         }
 788         /* issue an request_sense */
 789         memset(&psrb->cmd[0], 0, 12);
 790         psrb->cmd[0] = SCSI_REQ_SENSE;
 791         psrb->cmd[1] = srb->lun << 5;
 792         psrb->cmd[4] = 18;
 793         psrb->datalen = 18;
 794         psrb->pdata = &srb->sense_buf[0];
 795         psrb->cmdlen = 12;
 796         /* issue the command */
 797         result = usb_stor_CB_comdat(psrb, us);
 798         debug("auto request returned %d\n", result);
 799         /* if this is an CBI Protocol, get IRQ */
 800         if (us->protocol == US_PR_CBI)
 801                 status = usb_stor_CBI_get_status(psrb, us);
 802
 803         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 804                 debug(" AUTO REQUEST ERROR %ld\n",
 805                       us->pusb_dev->status);
 806                 return USB_STOR_TRANSPORT_ERROR;
 807         }
 808         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 809               srb->sense_buf[0], srb->sense_buf[2],
 810               srb->sense_buf[12], srb->sense_buf[13]);
 811         /* Check the auto request result */
 812         if ((srb->sense_buf[2] == 0) &&
 813             (srb->sense_buf[12] == 0) &&
 814             (srb->sense_buf[13] == 0)) {
 815                 /* ok, no sense */
 816                 return USB_STOR_TRANSPORT_GOOD;
 817         }
 818
 819         /* Check the auto request result */
 820         switch (srb->sense_buf[2]) {
 821         case 0x01:
 822                 /* Recovered Error */
 823                 return USB_STOR_TRANSPORT_GOOD;
 824                 break;
 825         case 0x02:
 826                 /* Not Ready */
 827                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 828                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 829                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 830                                 srb->sense_buf[0], srb->sense_buf[2],
 831                                 srb->sense_buf[12], srb->sense_buf[13]);
 832                         return USB_STOR_TRANSPORT_FAILED;
 833                 } else {
 834                         mdelay(100);
 835                         goto do_retry;
 836                 }
 837                 break;
 838         default:
 839                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 840                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 841                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 842                                 srb->sense_buf[2], srb->sense_buf[12],
 843                                 srb->sense_buf[13]);
 844                         return USB_STOR_TRANSPORT_FAILED;
 845                 } else
 846                         goto do_retry;
 847                 break;
 848         }
 849         return USB_STOR_TRANSPORT_FAILED;
 850 }
 851
 852
 853 static int usb_inquiry(ccb *srb, struct us_data *ss)
 854 {
 855         int retry, i;
 856         retry = 5;
 857         do {
 858                 memset(&srb->cmd[0], 0, 12);
 859                 srb->cmd[0] = SCSI_INQUIRY;
 860                 srb->cmd[1] = srb->lun << 5;
 861                 srb->cmd[4] = 36;
 862                 srb->datalen = 36;
 863                 srb->cmdlen = 12;
 864                 i = ss->transport(srb, ss);
 865                 debug("inquiry returns %d\n", i);
 866                 if (i == 0)
 867                         break;
 868         } while (--retry);
 869
 870         if (!retry) {
 871                 printf("error in inquiry\n");
 872                 return -1;
 873         }
 874         return 0;
 875 }
 876
 877 static int usb_request_sense(ccb *srb, struct us_data *ss)
 878 {
 879         char *ptr;
 880
 881         ptr = (char *)srb->pdata;
 882         memset(&srb->cmd[0], 0, 12);
 883         srb->cmd[0] = SCSI_REQ_SENSE;
 884         srb->cmd[1] = srb->lun << 5;
 885         srb->cmd[4] = 18;
 886         srb->datalen = 18;
 887         srb->pdata = &srb->sense_buf[0];
 888         srb->cmdlen = 12;
 889         ss->transport(srb, ss);
 890         debug("Request Sense returned %02X %02X %02X\n",
 891               srb->sense_buf[2], srb->sense_buf[12],
 892               srb->sense_buf[13]);
 893         srb->pdata = (uchar *)ptr;
 894         return 0;
 895 }
 896
 897 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
 898 {
 899         int retries = 10;
 900
 901         do {
 902                 memset(&srb->cmd[0], 0, 12);
 903                 srb->cmd[0] = SCSI_TST_U_RDY;
 904                 srb->cmd[1] = srb->lun << 5;
 905                 srb->datalen = 0;
 906                 srb->cmdlen = 12;
 907                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
 908                         ss->flags |= USB_READY;
 909                         return 0;
 910                 }
 911                 usb_request_sense(srb, ss);
 912                 /*
 913                  * Check the Key Code Qualifier, if it matches
 914                  * "Not Ready - medium not present"
 915                  * (the sense Key equals 0x2 and the ASC is 0x3a)
 916                  * return immediately as the medium being absent won't change
 917                  * unless there is a user action.
 918                  */
 919                 if ((srb->sense_buf[2] == 0x02) &&
 920                     (srb->sense_buf[12] == 0x3a))
 921                         return -1;
 922                 mdelay(100);
 923         } while (retries--);
 924
 925         return -1;
 926 }
 927
 928 static int usb_read_capacity(ccb *srb, struct us_data *ss)
 929 {
 930         int retry;
 931         /* XXX retries */
 932         retry = 3;
 933         do {
 934                 memset(&srb->cmd[0], 0, 12);
 935                 srb->cmd[0] = SCSI_RD_CAPAC;
 936                 srb->cmd[1] = srb->lun << 5;
 937                 srb->datalen = 8;
 938                 srb->cmdlen = 12;
 939                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 940                         return 0;
 941         } while (retry--);
 942
 943         return -1;
 944 }
 945
 946 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
 947                        unsigned short blocks)
 948 {
 949         memset(&srb->cmd[0], 0, 12);
 950         srb->cmd[0] = SCSI_READ10;
 951         srb->cmd[1] = srb->lun << 5;
 952         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 953         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 954         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 955         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 956         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 957         srb->cmd[8] = (unsigned char) blocks & 0xff;
 958         srb->cmdlen = 12;
 959         debug("read10: start %lx blocks %x\n", start, blocks);
 960         return ss->transport(srb, ss);
 961 }
 962
 963 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
 964                         unsigned short blocks)
 965 {
 966         memset(&srb->cmd[0], 0, 12);
 967         srb->cmd[0] = SCSI_WRITE10;
 968         srb->cmd[1] = srb->lun << 5;
 969         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 970         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 971         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 972         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 973         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 974         srb->cmd[8] = (unsigned char) blocks & 0xff;
 975         srb->cmdlen = 12;
 976         debug("write10: start %lx blocks %x\n", start, blocks);
 977         return ss->transport(srb, ss);
 978 }
 979
 980
 981 #ifdef CONFIG_USB_BIN_FIXUP
 982 /*
 983  * Some USB storage devices queried for SCSI identification data respond with
 984  * binary strings, which if output to the console freeze the terminal. The
 985  * workaround is to modify the vendor and product strings read from such
 986  * device with proper values (as reported by 'usb info').
 987  *
 988  * Vendor and product length limits are taken from the definition of
 989  * block_dev_desc_t in include/part.h.
 990  */
 991 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
 992                                 unsigned char vendor[],
 993                                 unsigned char product[]) {
 994         const unsigned char max_vendor_len = 40;
 995         const unsigned char max_product_len = 20;
 996         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
 997                 strncpy((char *)vendor, "SMSC", max_vendor_len);
 998                 strncpy((char *)product, "Flash Media Cntrller",
 999                         max_product_len);
1000         }
1001 }
1002 #endif /* CONFIG_USB_BIN_FIXUP */
1003
1004 unsigned long usb_stor_read(int device, lbaint_t blknr,
1005                             lbaint_t blkcnt, void *buffer)
1006 {
1007         lbaint_t start, blks;
1008         uintptr_t buf_addr;
1009         unsigned short smallblks;
1010         struct usb_device *dev;
1011         struct us_data *ss;
1012         int retry;
1013         ccb *srb = &usb_ccb;
1014
1015         if (blkcnt == 0)
1016                 return 0;
1017
1018         device &= 0xff;
1019         /* Setup  device */
1020         debug("\nusb_read: dev %d\n", device);
1021         dev = usb_dev_desc[device].priv;
1022         if (!dev) {
1023                 debug("%s: No device\n", __func__);
1024                 return 0;
1025         }
1026         ss = (struct us_data *)dev->privptr;
1027
1028         usb_disable_asynch(1); /* asynch transfer not allowed */
1029         srb->lun = usb_dev_desc[device].lun;
1030         buf_addr = (uintptr_t)buffer;
1031         start = blknr;
1032         blks = blkcnt;
1033
1034         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
1035               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1036
1037         do {
1038                 /* XXX need some comment here */
1039                 retry = 2;
1040                 srb->pdata = (unsigned char *)buf_addr;
1041                 if (blks > USB_MAX_XFER_BLK)
1042                         smallblks = USB_MAX_XFER_BLK;
1043                 else
1044                         smallblks = (unsigned short) blks;
1045 retry_it:
1046                 if (smallblks == USB_MAX_XFER_BLK)
1047                         usb_show_progress();
1048                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1049                 srb->pdata = (unsigned char *)buf_addr;
1050                 if (usb_read_10(srb, ss, start, smallblks)) {
1051                         debug("Read ERROR\n");
1052                         usb_request_sense(srb, ss);
1053                         if (retry--)
1054                                 goto retry_it;
1055                         blkcnt -= blks;
1056                         break;
1057                 }
1058                 start += smallblks;
1059                 blks -= smallblks;
1060                 buf_addr += srb->datalen;
1061         } while (blks != 0);
1062         ss->flags &= ~USB_READY;
1063
1064         debug("usb_read: end startblk " LBAF
1065               ", blccnt %x buffer %" PRIxPTR "\n",
1066               start, smallblks, buf_addr);
1067
1068         usb_disable_asynch(0); /* asynch transfer allowed */
1069         if (blkcnt >= USB_MAX_XFER_BLK)
1070                 debug("\n");
1071         return blkcnt;
1072 }
1073
1074 unsigned long usb_stor_write(int device, lbaint_t blknr,
1075                                 lbaint_t blkcnt, const void *buffer)
1076 {
1077         lbaint_t start, blks;
1078         uintptr_t buf_addr;
1079         unsigned short smallblks;
1080         struct usb_device *dev;
1081         struct us_data *ss;
1082         int retry;
1083         ccb *srb = &usb_ccb;
1084
1085         if (blkcnt == 0)
1086                 return 0;
1087
1088         device &= 0xff;
1089         /* Setup  device */
1090         debug("\nusb_write: dev %d\n", device);
1091         dev = usb_dev_desc[device].priv;
1092         if (!dev)
1093                 return 0;
1094         ss = (struct us_data *)dev->privptr;
1095
1096         usb_disable_asynch(1); /* asynch transfer not allowed */
1097
1098         srb->lun = usb_dev_desc[device].lun;
1099         buf_addr = (uintptr_t)buffer;
1100         start = blknr;
1101         blks = blkcnt;
1102
1103         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
1104               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1105
1106         do {
1107                 /* If write fails retry for max retry count else
1108                  * return with number of blocks written successfully.
1109                  */
1110                 retry = 2;
1111                 srb->pdata = (unsigned char *)buf_addr;
1112                 if (blks > USB_MAX_XFER_BLK)
1113                         smallblks = USB_MAX_XFER_BLK;
1114                 else
1115                         smallblks = (unsigned short) blks;
1116 retry_it:
1117                 if (smallblks == USB_MAX_XFER_BLK)
1118                         usb_show_progress();
1119                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1120                 srb->pdata = (unsigned char *)buf_addr;
1121                 if (usb_write_10(srb, ss, start, smallblks)) {
1122                         debug("Write ERROR\n");
1123                         usb_request_sense(srb, ss);
1124                         if (retry--)
1125                                 goto retry_it;
1126                         blkcnt -= blks;
1127                         break;
1128                 }
1129                 start += smallblks;
1130                 blks -= smallblks;
1131                 buf_addr += srb->datalen;
1132         } while (blks != 0);
1133         ss->flags &= ~USB_READY;
1134
1135         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1136               PRIxPTR "\n", start, smallblks, buf_addr);
1137
1138         usb_disable_asynch(0); /* asynch transfer allowed */
1139         if (blkcnt >= USB_MAX_XFER_BLK)
1140                 debug("\n");
1141         return blkcnt;
1142
1143 }
1144
1145 /* Probe to see if a new device is actually a Storage device */
1146 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1147                       struct us_data *ss)
1148 {
1149         struct usb_interface *iface;
1150         int i;
1151         struct usb_endpoint_descriptor *ep_desc;
1152         unsigned int flags = 0;
1153
1154         int protocol = 0;
1155         int subclass = 0;
1156
1157         /* let's examine the device now */
1158         iface = &dev->config.if_desc[ifnum];
1159
1160 #if 0
1161         /* this is the place to patch some storage devices */
1162         debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1163                         dev->descriptor.idProduct);
1164
1165         if ((dev->descriptor.idVendor) == 0x066b &&
1166             (dev->descriptor.idProduct) == 0x0103) {
1167                 debug("patched for E-USB\n");
1168                 protocol = US_PR_CB;
1169                 subclass = US_SC_UFI;       /* an assumption */
1170         }
1171 #endif
1172
1173         if (dev->descriptor.bDeviceClass != 0 ||
1174                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1175                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1176                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1177                 debug("Not mass storage\n");
1178                 /* if it's not a mass storage, we go no further */
1179                 return 0;
1180         }
1181
1182         memset(ss, 0, sizeof(struct us_data));
1183
1184         /* At this point, we know we've got a live one */
1185         debug("\n\nUSB Mass Storage device detected\n");
1186
1187         /* Initialize the us_data structure with some useful info */
1188         ss->flags = flags;
1189         ss->ifnum = ifnum;
1190         ss->pusb_dev = dev;
1191         ss->attention_done = 0;
1192
1193         /* If the device has subclass and protocol, then use that.  Otherwise,
1194          * take data from the specific interface.
1195          */
1196         if (subclass) {
1197                 ss->subclass = subclass;
1198                 ss->protocol = protocol;
1199         } else {
1200                 ss->subclass = iface->desc.bInterfaceSubClass;
1201                 ss->protocol = iface->desc.bInterfaceProtocol;
1202         }
1203
1204         /* set the handler pointers based on the protocol */
1205         debug("Transport: ");
1206         switch (ss->protocol) {
1207         case US_PR_CB:
1208                 debug("Control/Bulk\n");
1209                 ss->transport = usb_stor_CB_transport;
1210                 ss->transport_reset = usb_stor_CB_reset;
1211                 break;
1212
1213         case US_PR_CBI:
1214                 debug("Control/Bulk/Interrupt\n");
1215                 ss->transport = usb_stor_CB_transport;
1216                 ss->transport_reset = usb_stor_CB_reset;
1217                 break;
1218         case US_PR_BULK:
1219                 debug("Bulk/Bulk/Bulk\n");
1220                 ss->transport = usb_stor_BBB_transport;
1221                 ss->transport_reset = usb_stor_BBB_reset;
1222                 break;
1223         default:
1224                 printf("USB Storage Transport unknown / not yet implemented\n");
1225                 return 0;
1226                 break;
1227         }
1228
1229         /*
1230          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1231          * An optional interrupt is OK (necessary for CBI protocol).
1232          * We will ignore any others.
1233          */
1234         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1235                 ep_desc = &iface->ep_desc[i];
1236                 /* is it an BULK endpoint? */
1237                 if ((ep_desc->bmAttributes &
1238                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1239                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1240                                 ss->ep_in = ep_desc->bEndpointAddress &
1241                                                 USB_ENDPOINT_NUMBER_MASK;
1242                         else
1243                                 ss->ep_out =
1244                                         ep_desc->bEndpointAddress &
1245                                         USB_ENDPOINT_NUMBER_MASK;
1246                 }
1247
1248                 /* is it an interrupt endpoint? */
1249                 if ((ep_desc->bmAttributes &
1250                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1251                         ss->ep_int = ep_desc->bEndpointAddress &
1252                                                 USB_ENDPOINT_NUMBER_MASK;
1253                         ss->irqinterval = ep_desc->bInterval;
1254                 }
1255         }
1256         debug("Endpoints In %d Out %d Int %d\n",
1257               ss->ep_in, ss->ep_out, ss->ep_int);
1258
1259         /* Do some basic sanity checks, and bail if we find a problem */
1260         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1261             !ss->ep_in || !ss->ep_out ||
1262             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1263                 debug("Problems with device\n");
1264                 return 0;
1265         }
1266         /* set class specific stuff */
1267         /* We only handle certain protocols.  Currently, these are
1268          * the only ones.
1269          * The SFF8070 accepts the requests used in u-boot
1270          */
1271         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1272             ss->subclass != US_SC_8070) {
1273                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1274                 return 0;
1275         }
1276         if (ss->ep_int) {
1277                 /* we had found an interrupt endpoint, prepare irq pipe
1278                  * set up the IRQ pipe and handler
1279                  */
1280                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1281                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1282                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1283                 dev->irq_handle = usb_stor_irq;
1284         }
1285         dev->privptr = (void *)ss;
1286         return 1;
1287 }
1288
1289 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1290                       block_dev_desc_t *dev_desc)
1291 {
1292         unsigned char perq, modi;
1293         ALLOC_CACHE_ALIGN_BUFFER(u32, cap, 2);
1294         ALLOC_CACHE_ALIGN_BUFFER(u8, usb_stor_buf, 36);
1295         u32 capacity, blksz;
1296         ccb *pccb = &usb_ccb;
1297
1298         pccb->pdata = usb_stor_buf;
1299
1300         dev_desc->target = dev->devnum;
1301         pccb->lun = dev_desc->lun;
1302         debug(" address %d\n", dev_desc->target);
1303
1304         if (usb_inquiry(pccb, ss)) {
1305                 debug("%s: usb_inquiry() failed\n", __func__);
1306                 return -1;
1307         }
1308
1309         perq = usb_stor_buf[0];
1310         modi = usb_stor_buf[1];
1311
1312         /*
1313          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1314          * they would not respond to test_unit_ready .
1315          */
1316         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1317                 debug("%s: unknown/unsupported device\n", __func__);
1318                 return 0;
1319         }
1320         if ((modi&0x80) == 0x80) {
1321                 /* drive is removable */
1322                 dev_desc->removable = 1;
1323         }
1324         memcpy(dev_desc->vendor, (const void *)&usb_stor_buf[8], 8);
1325         memcpy(dev_desc->product, (const void *)&usb_stor_buf[16], 16);
1326         memcpy(dev_desc->revision, (const void *)&usb_stor_buf[32], 4);
1327         dev_desc->vendor[8] = 0;
1328         dev_desc->product[16] = 0;
1329         dev_desc->revision[4] = 0;
1330 #ifdef CONFIG_USB_BIN_FIXUP
1331         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1332                       (uchar *)dev_desc->product);
1333 #endif /* CONFIG_USB_BIN_FIXUP */
1334         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1335               usb_stor_buf[3]);
1336         if (usb_test_unit_ready(pccb, ss)) {
1337                 printf("Device NOT ready\n"
1338                        "   Request Sense returned %02X %02X %02X\n",
1339                        pccb->sense_buf[2], pccb->sense_buf[12],
1340                        pccb->sense_buf[13]);
1341                 if (dev_desc->removable == 1) {
1342                         dev_desc->type = perq;
1343                         return 1;
1344                 }
1345                 return 0;
1346         }
1347         pccb->pdata = (unsigned char *)cap;
1348         memset(pccb->pdata, 0, 8);
1349         if (usb_read_capacity(pccb, ss) != 0) {
1350                 printf("READ_CAP ERROR\n");
1351                 cap[0] = 2880;
1352                 cap[1] = 0x200;
1353         }
1354         ss->flags &= ~USB_READY;
1355         debug("Read Capacity returns: 0x%08x, 0x%08x\n", cap[0], cap[1]);
1356 #if 0
1357         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1358                 cap[0] >>= 16;
1359
1360         cap[0] = cpu_to_be32(cap[0]);
1361         cap[1] = cpu_to_be32(cap[1]);
1362 #endif
1363
1364         capacity = be32_to_cpu(cap[0]) + 1;
1365         blksz = be32_to_cpu(cap[1]);
1366
1367         debug("Capacity = 0x%08x, blocksz = 0x%08x\n", capacity, blksz);
1368         dev_desc->lba = capacity;
1369         dev_desc->blksz = blksz;
1370         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1371         dev_desc->type = perq;
1372         debug(" address %d\n", dev_desc->target);
1373         debug("partype: %d\n", dev_desc->part_type);
1374
1375         init_part(dev_desc);
1376
1377         debug("partype: %d\n", dev_desc->part_type);
1378         return 1;
1379 }