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  * Driver model conversion:
  13  *   (C) Copyright 2015 Google, Inc
  14  *
  15  * For BBB support (C) Copyright 2003
  16  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
  17  *
  18  * BBB support based on /sys/dev/usb/umass.c from
  19  * FreeBSD.
  20  *
  21  * SPDX-License-Identifier:     GPL-2.0+
  22  */
  23
  24 /* Note:
  25  * Currently only the CBI transport protocoll has been implemented, and it
  26  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
  27  * transport protocoll may work as well.
  28  */
  29 /*
  30  * New Note:
  31  * Support for USB Mass Storage Devices (BBB) has been added. It has
  32  * only been tested with USB memory sticks.
  33  */
  34
  35
  36 #include <common.h>
  37 #include <command.h>
  38 #include <dm.h>
  39 #include <errno.h>
  40 #include <inttypes.h>
  41 #include <mapmem.h>
  42 #include <memalign.h>
  43 #include <asm/byteorder.h>
  44 #include <asm/processor.h>
  45 #include <dm/device-internal.h>
  46 #include <dm/lists.h>
  47
  48 #include <part.h>
  49 #include <usb.h>
  50
  51 #undef BBB_COMDAT_TRACE
  52 #undef BBB_XPORT_TRACE
  53
  54 #include <scsi.h>
  55 /* direction table -- this indicates the direction of the data
  56  * transfer for each command code -- a 1 indicates input
  57  */
  58 static const unsigned char us_direction[256/8] = {
  59         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  60         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  61         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  62         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  63 };
  64 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  65
  66 static struct scsi_cmd usb_ccb __aligned(ARCH_DMA_MINALIGN);
  67 static __u32 CBWTag;
  68
  69 static int usb_max_devs; /* number of highest available usb device */
  70
  71 #ifndef CONFIG_BLK
  72 static struct blk_desc usb_dev_desc[USB_MAX_STOR_DEV];
  73 #endif
  74
  75 struct us_data;
  76 typedef int (*trans_cmnd)(struct scsi_cmd *cb, struct us_data *data);
  77 typedef int (*trans_reset)(struct us_data *data);
  78
  79 struct us_data {
  80         struct usb_device *pusb_dev;     /* this usb_device */
  81
  82         unsigned int    flags;                  /* from filter initially */
  83 #       define USB_READY        (1 << 0)
  84         unsigned char   ifnum;                  /* interface number */
  85         unsigned char   ep_in;                  /* in endpoint */
  86         unsigned char   ep_out;                 /* out ....... */
  87         unsigned char   ep_int;                 /* interrupt . */
  88         unsigned char   subclass;               /* as in overview */
  89         unsigned char   protocol;               /* .............. */
  90         unsigned char   attention_done;         /* force attn on first cmd */
  91         unsigned short  ip_data;                /* interrupt data */
  92         int             action;                 /* what to do */
  93         int             ip_wanted;              /* needed */
  94         int             *irq_handle;            /* for USB int requests */
  95         unsigned int    irqpipe;                /* pipe for release_irq */
  96         unsigned char   irqmaxp;                /* max packed for irq Pipe */
  97         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
  98         struct scsi_cmd *srb;                   /* current srb */
  99         trans_reset     transport_reset;        /* reset routine */
 100         trans_cmnd      transport;              /* transport routine */
 101         unsigned short  max_xfer_blk;           /* maximum transfer blocks */
 102 };
 103
 104 #ifndef CONFIG_BLK
 105 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 106 #endif
 107
 108 #define USB_STOR_TRANSPORT_GOOD    0
 109 #define USB_STOR_TRANSPORT_FAILED -1
 110 #define USB_STOR_TRANSPORT_ERROR  -2
 111
 112 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
 113                       struct blk_desc *dev_desc);
 114 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 115                       struct us_data *ss);
 116 #ifdef CONFIG_BLK
 117 static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
 118                                    lbaint_t blkcnt, void *buffer);
 119 static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
 120                                     lbaint_t blkcnt, const void *buffer);
 121 #else
 122 static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
 123                                    lbaint_t blkcnt, void *buffer);
 124 static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
 125                                     lbaint_t blkcnt, const void *buffer);
 126 #endif
 127 void uhci_show_temp_int_td(void);
 128
 129 static void usb_show_progress(void)
 130 {
 131         debug(".");
 132 }
 133
 134 /*******************************************************************************
 135  * show info on storage devices; 'usb start/init' must be invoked earlier
 136  * as we only retrieve structures populated during devices initialization
 137  */
 138 int usb_stor_info(void)
 139 {
 140         int count = 0;
 141 #ifdef CONFIG_BLK
 142         struct udevice *dev;
 143
 144         for (blk_first_device(IF_TYPE_USB, &dev);
 145              dev;
 146              blk_next_device(&dev)) {
 147                 struct blk_desc *desc = dev_get_uclass_platdata(dev);
 148
 149                 printf("  Device %d: ", desc->devnum);
 150                 dev_print(desc);
 151                 count++;
 152         }
 153 #else
 154         int i;
 155
 156         if (usb_max_devs > 0) {
 157                 for (i = 0; i < usb_max_devs; i++) {
 158                         printf("  Device %d: ", i);
 159                         dev_print(&usb_dev_desc[i]);
 160                 }
 161                 return 0;
 162         }
 163 #endif
 164         if (!count) {
 165                 printf("No storage devices, perhaps not 'usb start'ed..?\n");
 166                 return 1;
 167         }
 168
 169         return 0;
 170 }
 171
 172 static unsigned int usb_get_max_lun(struct us_data *us)
 173 {
 174         int len;
 175         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
 176         len = usb_control_msg(us->pusb_dev,
 177                               usb_rcvctrlpipe(us->pusb_dev, 0),
 178                               US_BBB_GET_MAX_LUN,
 179                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 180                               0, us->ifnum,
 181                               result, sizeof(char),
 182                               USB_CNTL_TIMEOUT * 5);
 183         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
 184         return (len > 0) ? *result : 0;
 185 }
 186
 187 static int usb_stor_probe_device(struct usb_device *udev)
 188 {
 189         int lun, max_lun;
 190
 191 #ifdef CONFIG_BLK
 192         struct us_data *data;
 193         int ret;
 194 #else
 195         int start;
 196
 197         if (udev == NULL)
 198                 return -ENOENT; /* no more devices available */
 199 #endif
 200
 201         debug("\n\nProbing for storage\n");
 202 #ifdef CONFIG_BLK
 203         /*
 204          * We store the us_data in the mass storage device's platdata. It
 205          * is shared by all LUNs (block devices) attached to this mass storage
 206          * device.
 207          */
 208         data = dev_get_platdata(udev->dev);
 209         if (!usb_storage_probe(udev, 0, data))
 210                 return 0;
 211         max_lun = usb_get_max_lun(data);
 212         for (lun = 0; lun <= max_lun; lun++) {
 213                 struct blk_desc *blkdev;
 214                 struct udevice *dev;
 215                 char str[10];
 216
 217                 snprintf(str, sizeof(str), "lun%d", lun);
 218                 ret = blk_create_devicef(udev->dev, "usb_storage_blk", str,
 219                                          IF_TYPE_USB, usb_max_devs, 512, 0,
 220                                          &dev);
 221                 if (ret) {
 222                         debug("Cannot bind driver\n");
 223                         return ret;
 224                 }
 225
 226                 blkdev = dev_get_uclass_platdata(dev);
 227                 blkdev->target = 0xff;
 228                 blkdev->lun = lun;
 229
 230                 ret = usb_stor_get_info(udev, data, blkdev);
 231                 if (ret == 1)
 232                         ret = blk_prepare_device(dev);
 233                 if (!ret) {
 234                         usb_max_devs++;
 235                         debug("%s: Found device %p\n", __func__, udev);
 236                 } else {
 237                         debug("usb_stor_get_info: Invalid device\n");
 238                         ret = device_unbind(dev);
 239                         if (ret)
 240                                 return ret;
 241                 }
 242         }
 243 #else
 244         /* We don't have space to even probe if we hit the maximum */
 245         if (usb_max_devs == USB_MAX_STOR_DEV) {
 246                 printf("max USB Storage Device reached: %d stopping\n",
 247                        usb_max_devs);
 248                 return -ENOSPC;
 249         }
 250
 251         if (!usb_storage_probe(udev, 0, &usb_stor[usb_max_devs]))
 252                 return 0;
 253
 254         /*
 255          * OK, it's a storage device.  Iterate over its LUNs and populate
 256          * usb_dev_desc'
 257          */
 258         start = usb_max_devs;
 259
 260         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 261         for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
 262              lun++) {
 263                 struct blk_desc *blkdev;
 264
 265                 blkdev = &usb_dev_desc[usb_max_devs];
 266                 memset(blkdev, '\0', sizeof(struct blk_desc));
 267                 blkdev->if_type = IF_TYPE_USB;
 268                 blkdev->devnum = usb_max_devs;
 269                 blkdev->part_type = PART_TYPE_UNKNOWN;
 270                 blkdev->target = 0xff;
 271                 blkdev->type = DEV_TYPE_UNKNOWN;
 272                 blkdev->block_read = usb_stor_read;
 273                 blkdev->block_write = usb_stor_write;
 274                 blkdev->lun = lun;
 275                 blkdev->priv = udev;
 276
 277                 if (usb_stor_get_info(udev, &usb_stor[start],
 278                                       &usb_dev_desc[usb_max_devs]) == 1) {
 279                         debug("partype: %d\n", blkdev->part_type);
 280                         part_init(blkdev);
 281                         debug("partype: %d\n", blkdev->part_type);
 282                         usb_max_devs++;
 283                         debug("%s: Found device %p\n", __func__, udev);
 284                 }
 285         }
 286 #endif
 287
 288         return 0;
 289 }
 290
 291 void usb_stor_reset(void)
 292 {
 293         usb_max_devs = 0;
 294 }
 295
 296 /*******************************************************************************
 297  * scan the usb and reports device info
 298  * to the user if mode = 1
 299  * returns current device or -1 if no
 300  */
 301 int usb_stor_scan(int mode)
 302 {
 303         if (mode == 1)
 304                 printf("       scanning usb for storage devices... ");
 305
 306 #ifndef CONFIG_DM_USB
 307         unsigned char i;
 308
 309         usb_disable_asynch(1); /* asynch transfer not allowed */
 310
 311         usb_stor_reset();
 312         for (i = 0; i < USB_MAX_DEVICE; i++) {
 313                 struct usb_device *dev;
 314
 315                 dev = usb_get_dev_index(i); /* get device */
 316                 debug("i=%d\n", i);
 317                 if (usb_stor_probe_device(dev))
 318                         break;
 319         } /* for */
 320
 321         usb_disable_asynch(0); /* asynch transfer allowed */
 322 #endif
 323         printf("%d Storage Device(s) found\n", usb_max_devs);
 324         if (usb_max_devs > 0)
 325                 return 0;
 326         return -1;
 327 }
 328
 329 static int usb_stor_irq(struct usb_device *dev)
 330 {
 331         struct us_data *us;
 332         us = (struct us_data *)dev->privptr;
 333
 334         if (us->ip_wanted)
 335                 us->ip_wanted = 0;
 336         return 0;
 337 }
 338
 339
 340 #ifdef  DEBUG
 341
 342 static void usb_show_srb(struct scsi_cmd *pccb)
 343 {
 344         int i;
 345         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
 346         for (i = 0; i < 12; i++)
 347                 printf("%02X ", pccb->cmd[i]);
 348         printf("\n");
 349 }
 350
 351 static void display_int_status(unsigned long tmp)
 352 {
 353         printf("Status: %s %s %s %s %s %s %s\n",
 354                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 355                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 356                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 357                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 358                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 359                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 360                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 361 }
 362 #endif
 363 /***********************************************************************
 364  * Data transfer routines
 365  ***********************************************************************/
 366
 367 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 368 {
 369         int max_size;
 370         int this_xfer;
 371         int result;
 372         int partial;
 373         int maxtry;
 374         int stat;
 375
 376         /* determine the maximum packet size for these transfers */
 377         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 378
 379         /* while we have data left to transfer */
 380         while (length) {
 381
 382                 /* calculate how long this will be -- maximum or a remainder */
 383                 this_xfer = length > max_size ? max_size : length;
 384                 length -= this_xfer;
 385
 386                 /* setup the retry counter */
 387                 maxtry = 10;
 388
 389                 /* set up the transfer loop */
 390                 do {
 391                         /* transfer the data */
 392                         debug("Bulk xfer 0x%lx(%d) try #%d\n",
 393                               (ulong)map_to_sysmem(buf), this_xfer,
 394                               11 - maxtry);
 395                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 396                                               this_xfer, &partial,
 397                                               USB_CNTL_TIMEOUT * 5);
 398                         debug("bulk_msg returned %d xferred %d/%d\n",
 399                               result, partial, this_xfer);
 400                         if (us->pusb_dev->status != 0) {
 401                                 /* if we stall, we need to clear it before
 402                                  * we go on
 403                                  */
 404 #ifdef DEBUG
 405                                 display_int_status(us->pusb_dev->status);
 406 #endif
 407                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 408                                         debug("stalled ->clearing endpoint" \
 409                                               "halt for pipe 0x%x\n", pipe);
 410                                         stat = us->pusb_dev->status;
 411                                         usb_clear_halt(us->pusb_dev, pipe);
 412                                         us->pusb_dev->status = stat;
 413                                         if (this_xfer == partial) {
 414                                                 debug("bulk transferred" \
 415                                                       "with error %lX," \
 416                                                       " but data ok\n",
 417                                                       us->pusb_dev->status);
 418                                                 return 0;
 419                                         }
 420                                         else
 421                                                 return result;
 422                                 }
 423                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 424                                         debug("Device NAKed bulk_msg\n");
 425                                         return result;
 426                                 }
 427                                 debug("bulk transferred with error");
 428                                 if (this_xfer == partial) {
 429                                         debug(" %ld, but data ok\n",
 430                                               us->pusb_dev->status);
 431                                         return 0;
 432                                 }
 433                                 /* if our try counter reaches 0, bail out */
 434                                         debug(" %ld, data %d\n",
 435                                               us->pusb_dev->status, partial);
 436                                 if (!maxtry--)
 437                                                 return result;
 438                         }
 439                         /* update to show what data was transferred */
 440                         this_xfer -= partial;
 441                         buf += partial;
 442                         /* continue until this transfer is done */
 443                 } while (this_xfer);
 444         }
 445
 446         /* if we get here, we're done and successful */
 447         return 0;
 448 }
 449
 450 static int usb_stor_BBB_reset(struct us_data *us)
 451 {
 452         int result;
 453         unsigned int pipe;
 454
 455         /*
 456          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
 457          *
 458          * For Reset Recovery the host shall issue in the following order:
 459          * a) a Bulk-Only Mass Storage Reset
 460          * b) a Clear Feature HALT to the Bulk-In endpoint
 461          * c) a Clear Feature HALT to the Bulk-Out endpoint
 462          *
 463          * This is done in 3 steps.
 464          *
 465          * If the reset doesn't succeed, the device should be port reset.
 466          *
 467          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
 468          */
 469         debug("BBB_reset\n");
 470         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 471                                  US_BBB_RESET,
 472                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 473                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
 474
 475         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 476                 debug("RESET:stall\n");
 477                 return -1;
 478         }
 479
 480         /* long wait for reset */
 481         mdelay(150);
 482         debug("BBB_reset result %d: status %lX reset\n",
 483               result, us->pusb_dev->status);
 484         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 485         result = usb_clear_halt(us->pusb_dev, pipe);
 486         /* long wait for reset */
 487         mdelay(150);
 488         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
 489               result, us->pusb_dev->status);
 490         /* long wait for reset */
 491         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 492         result = usb_clear_halt(us->pusb_dev, pipe);
 493         mdelay(150);
 494         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
 495               result, us->pusb_dev->status);
 496         debug("BBB_reset done\n");
 497         return 0;
 498 }
 499
 500 /* FIXME: this reset function doesn't really reset the port, and it
 501  * should. Actually it should probably do what it's doing here, and
 502  * reset the port physically
 503  */
 504 static int usb_stor_CB_reset(struct us_data *us)
 505 {
 506         unsigned char cmd[12];
 507         int result;
 508
 509         debug("CB_reset\n");
 510         memset(cmd, 0xff, sizeof(cmd));
 511         cmd[0] = SCSI_SEND_DIAG;
 512         cmd[1] = 4;
 513         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 514                                  US_CBI_ADSC,
 515                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 516                                  0, us->ifnum, cmd, sizeof(cmd),
 517                                  USB_CNTL_TIMEOUT * 5);
 518
 519         /* long wait for reset */
 520         mdelay(1500);
 521         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
 522               result, us->pusb_dev->status);
 523         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 524         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 525
 526         debug("CB_reset done\n");
 527         return 0;
 528 }
 529
 530 /*
 531  * Set up the command for a BBB device. Note that the actual SCSI
 532  * command is copied into cbw.CBWCDB.
 533  */
 534 static int usb_stor_BBB_comdat(struct scsi_cmd *srb, struct us_data *us)
 535 {
 536         int result;
 537         int actlen;
 538         int dir_in;
 539         unsigned int pipe;
 540         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_cbw, cbw, 1);
 541
 542         dir_in = US_DIRECTION(srb->cmd[0]);
 543
 544 #ifdef BBB_COMDAT_TRACE
 545         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
 546                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 547                 srb->pdata);
 548         if (srb->cmdlen) {
 549                 for (result = 0; result < srb->cmdlen; result++)
 550                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 551                 printf("\n");
 552         }
 553 #endif
 554         /* sanity checks */
 555         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 556                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
 557                 return -1;
 558         }
 559
 560         /* always OUT to the ep */
 561         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 562
 563         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 564         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 565         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 566         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 567         cbw->bCBWLUN = srb->lun;
 568         cbw->bCDBLength = srb->cmdlen;
 569         /* copy the command data into the CBW command data buffer */
 570         /* DST SRC LEN!!! */
 571
 572         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 573         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 574                               &actlen, USB_CNTL_TIMEOUT * 5);
 575         if (result < 0)
 576                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 577         return result;
 578 }
 579
 580 /* FIXME: we also need a CBI_command which sets up the completion
 581  * interrupt, and waits for it
 582  */
 583 static int usb_stor_CB_comdat(struct scsi_cmd *srb, struct us_data *us)
 584 {
 585         int result = 0;
 586         int dir_in, retry;
 587         unsigned int pipe;
 588         unsigned long status;
 589
 590         retry = 5;
 591         dir_in = US_DIRECTION(srb->cmd[0]);
 592
 593         if (dir_in)
 594                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 595         else
 596                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 597
 598         while (retry--) {
 599                 debug("CBI gets a command: Try %d\n", 5 - retry);
 600 #ifdef DEBUG
 601                 usb_show_srb(srb);
 602 #endif
 603                 /* let's send the command via the control pipe */
 604                 result = usb_control_msg(us->pusb_dev,
 605                                          usb_sndctrlpipe(us->pusb_dev , 0),
 606                                          US_CBI_ADSC,
 607                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 608                                          0, us->ifnum,
 609                                          srb->cmd, srb->cmdlen,
 610                                          USB_CNTL_TIMEOUT * 5);
 611                 debug("CB_transport: control msg returned %d, status %lX\n",
 612                       result, us->pusb_dev->status);
 613                 /* check the return code for the command */
 614                 if (result < 0) {
 615                         if (us->pusb_dev->status & USB_ST_STALLED) {
 616                                 status = us->pusb_dev->status;
 617                                 debug(" stall during command found," \
 618                                       " clear pipe\n");
 619                                 usb_clear_halt(us->pusb_dev,
 620                                               usb_sndctrlpipe(us->pusb_dev, 0));
 621                                 us->pusb_dev->status = status;
 622                         }
 623                         debug(" error during command %02X" \
 624                               " Stat = %lX\n", srb->cmd[0],
 625                               us->pusb_dev->status);
 626                         return result;
 627                 }
 628                 /* transfer the data payload for this command, if one exists*/
 629
 630                 debug("CB_transport: control msg returned %d," \
 631                       " direction is %s to go 0x%lx\n", result,
 632                       dir_in ? "IN" : "OUT", srb->datalen);
 633                 if (srb->datalen) {
 634                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 635                                                  srb->datalen);
 636                         debug("CBI attempted to transfer data," \
 637                               " result is %d status %lX, len %d\n",
 638                               result, us->pusb_dev->status,
 639                                 us->pusb_dev->act_len);
 640                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 641                                 break;
 642                 } /* if (srb->datalen) */
 643                 else
 644                         break;
 645         }
 646         /* return result */
 647
 648         return result;
 649 }
 650
 651
 652 static int usb_stor_CBI_get_status(struct scsi_cmd *srb, struct us_data *us)
 653 {
 654         int timeout;
 655
 656         us->ip_wanted = 1;
 657         submit_int_msg(us->pusb_dev, us->irqpipe,
 658                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 659         timeout = 1000;
 660         while (timeout--) {
 661                 if (us->ip_wanted == 0)
 662                         break;
 663                 mdelay(10);
 664         }
 665         if (us->ip_wanted) {
 666                 printf("        Did not get interrupt on CBI\n");
 667                 us->ip_wanted = 0;
 668                 return USB_STOR_TRANSPORT_ERROR;
 669         }
 670         debug("Got interrupt data 0x%x, transferred %d status 0x%lX\n",
 671               us->ip_data, us->pusb_dev->irq_act_len,
 672               us->pusb_dev->irq_status);
 673         /* UFI gives us ASC and ASCQ, like a request sense */
 674         if (us->subclass == US_SC_UFI) {
 675                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 676                     srb->cmd[0] == SCSI_INQUIRY)
 677                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 678                 else if (us->ip_data)
 679                         return USB_STOR_TRANSPORT_FAILED;
 680                 else
 681                         return USB_STOR_TRANSPORT_GOOD;
 682         }
 683         /* otherwise, we interpret the data normally */
 684         switch (us->ip_data) {
 685         case 0x0001:
 686                 return USB_STOR_TRANSPORT_GOOD;
 687         case 0x0002:
 688                 return USB_STOR_TRANSPORT_FAILED;
 689         default:
 690                 return USB_STOR_TRANSPORT_ERROR;
 691         }                       /* switch */
 692         return USB_STOR_TRANSPORT_ERROR;
 693 }
 694
 695 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 696 #define USB_TRANSPORT_NOT_READY_RETRY 10
 697
 698 /* clear a stall on an endpoint - special for BBB devices */
 699 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 700 {
 701         /* ENDPOINT_HALT = 0, so set value to 0 */
 702         return usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 703                                USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
 704                                endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 705 }
 706
 707 static int usb_stor_BBB_transport(struct scsi_cmd *srb, struct us_data *us)
 708 {
 709         int result, retry;
 710         int dir_in;
 711         int actlen, data_actlen;
 712         unsigned int pipe, pipein, pipeout;
 713         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_csw, csw, 1);
 714 #ifdef BBB_XPORT_TRACE
 715         unsigned char *ptr;
 716         int index;
 717 #endif
 718
 719         dir_in = US_DIRECTION(srb->cmd[0]);
 720
 721         /* COMMAND phase */
 722         debug("COMMAND phase\n");
 723         result = usb_stor_BBB_comdat(srb, us);
 724         if (result < 0) {
 725                 debug("failed to send CBW status %ld\n",
 726                       us->pusb_dev->status);
 727                 usb_stor_BBB_reset(us);
 728                 return USB_STOR_TRANSPORT_FAILED;
 729         }
 730         if (!(us->flags & USB_READY))
 731                 mdelay(5);
 732         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 733         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 734         /* DATA phase + error handling */
 735         data_actlen = 0;
 736         /* no data, go immediately to the STATUS phase */
 737         if (srb->datalen == 0)
 738                 goto st;
 739         debug("DATA phase\n");
 740         if (dir_in)
 741                 pipe = pipein;
 742         else
 743                 pipe = pipeout;
 744
 745         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 746                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 747         /* special handling of STALL in DATA phase */
 748         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 749                 debug("DATA:stall\n");
 750                 /* clear the STALL on the endpoint */
 751                 result = usb_stor_BBB_clear_endpt_stall(us,
 752                                         dir_in ? us->ep_in : us->ep_out);
 753                 if (result >= 0)
 754                         /* continue on to STATUS phase */
 755                         goto st;
 756         }
 757         if (result < 0) {
 758                 debug("usb_bulk_msg error status %ld\n",
 759                       us->pusb_dev->status);
 760                 usb_stor_BBB_reset(us);
 761                 return USB_STOR_TRANSPORT_FAILED;
 762         }
 763 #ifdef BBB_XPORT_TRACE
 764         for (index = 0; index < data_actlen; index++)
 765                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 766         printf("\n");
 767 #endif
 768         /* STATUS phase + error handling */
 769 st:
 770         retry = 0;
 771 again:
 772         debug("STATUS phase\n");
 773         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 774                                 &actlen, USB_CNTL_TIMEOUT*5);
 775
 776         /* special handling of STALL in STATUS phase */
 777         if ((result < 0) && (retry < 1) &&
 778             (us->pusb_dev->status & USB_ST_STALLED)) {
 779                 debug("STATUS:stall\n");
 780                 /* clear the STALL on the endpoint */
 781                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 782                 if (result >= 0 && (retry++ < 1))
 783                         /* do a retry */
 784                         goto again;
 785         }
 786         if (result < 0) {
 787                 debug("usb_bulk_msg error status %ld\n",
 788                       us->pusb_dev->status);
 789                 usb_stor_BBB_reset(us);
 790                 return USB_STOR_TRANSPORT_FAILED;
 791         }
 792 #ifdef BBB_XPORT_TRACE
 793         ptr = (unsigned char *)csw;
 794         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 795                 printf("ptr[%d] %#x ", index, ptr[index]);
 796         printf("\n");
 797 #endif
 798         /* misuse pipe to get the residue */
 799         pipe = le32_to_cpu(csw->dCSWDataResidue);
 800         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 801                 pipe = srb->datalen - data_actlen;
 802         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 803                 debug("!CSWSIGNATURE\n");
 804                 usb_stor_BBB_reset(us);
 805                 return USB_STOR_TRANSPORT_FAILED;
 806         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 807                 debug("!Tag\n");
 808                 usb_stor_BBB_reset(us);
 809                 return USB_STOR_TRANSPORT_FAILED;
 810         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 811                 debug(">PHASE\n");
 812                 usb_stor_BBB_reset(us);
 813                 return USB_STOR_TRANSPORT_FAILED;
 814         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 815                 debug("=PHASE\n");
 816                 usb_stor_BBB_reset(us);
 817                 return USB_STOR_TRANSPORT_FAILED;
 818         } else if (data_actlen > srb->datalen) {
 819                 debug("transferred %dB instead of %ldB\n",
 820                       data_actlen, srb->datalen);
 821                 return USB_STOR_TRANSPORT_FAILED;
 822         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 823                 debug("FAILED\n");
 824                 return USB_STOR_TRANSPORT_FAILED;
 825         }
 826
 827         return result;
 828 }
 829
 830 static int usb_stor_CB_transport(struct scsi_cmd *srb, struct us_data *us)
 831 {
 832         int result, status;
 833         struct scsi_cmd *psrb;
 834         struct scsi_cmd reqsrb;
 835         int retry, notready;
 836
 837         psrb = &reqsrb;
 838         status = USB_STOR_TRANSPORT_GOOD;
 839         retry = 0;
 840         notready = 0;
 841         /* issue the command */
 842 do_retry:
 843         result = usb_stor_CB_comdat(srb, us);
 844         debug("command / Data returned %d, status %lX\n",
 845               result, us->pusb_dev->status);
 846         /* if this is an CBI Protocol, get IRQ */
 847         if (us->protocol == US_PR_CBI) {
 848                 status = usb_stor_CBI_get_status(srb, us);
 849                 /* if the status is error, report it */
 850                 if (status == USB_STOR_TRANSPORT_ERROR) {
 851                         debug(" USB CBI Command Error\n");
 852                         return status;
 853                 }
 854                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 855                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 856                 if (!us->ip_data) {
 857                         /* if the status is good, report it */
 858                         if (status == USB_STOR_TRANSPORT_GOOD) {
 859                                 debug(" USB CBI Command Good\n");
 860                                 return status;
 861                         }
 862                 }
 863         }
 864         /* do we have to issue an auto request? */
 865         /* HERE we have to check the result */
 866         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 867                 debug("ERROR %lX\n", us->pusb_dev->status);
 868                 us->transport_reset(us);
 869                 return USB_STOR_TRANSPORT_ERROR;
 870         }
 871         if ((us->protocol == US_PR_CBI) &&
 872             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 873             (srb->cmd[0] == SCSI_INQUIRY))) {
 874                 /* do not issue an autorequest after request sense */
 875                 debug("No auto request and good\n");
 876                 return USB_STOR_TRANSPORT_GOOD;
 877         }
 878         /* issue an request_sense */
 879         memset(&psrb->cmd[0], 0, 12);
 880         psrb->cmd[0] = SCSI_REQ_SENSE;
 881         psrb->cmd[1] = srb->lun << 5;
 882         psrb->cmd[4] = 18;
 883         psrb->datalen = 18;
 884         psrb->pdata = &srb->sense_buf[0];
 885         psrb->cmdlen = 12;
 886         /* issue the command */
 887         result = usb_stor_CB_comdat(psrb, us);
 888         debug("auto request returned %d\n", result);
 889         /* if this is an CBI Protocol, get IRQ */
 890         if (us->protocol == US_PR_CBI)
 891                 status = usb_stor_CBI_get_status(psrb, us);
 892
 893         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 894                 debug(" AUTO REQUEST ERROR %ld\n",
 895                       us->pusb_dev->status);
 896                 return USB_STOR_TRANSPORT_ERROR;
 897         }
 898         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 899               srb->sense_buf[0], srb->sense_buf[2],
 900               srb->sense_buf[12], srb->sense_buf[13]);
 901         /* Check the auto request result */
 902         if ((srb->sense_buf[2] == 0) &&
 903             (srb->sense_buf[12] == 0) &&
 904             (srb->sense_buf[13] == 0)) {
 905                 /* ok, no sense */
 906                 return USB_STOR_TRANSPORT_GOOD;
 907         }
 908
 909         /* Check the auto request result */
 910         switch (srb->sense_buf[2]) {
 911         case 0x01:
 912                 /* Recovered Error */
 913                 return USB_STOR_TRANSPORT_GOOD;
 914                 break;
 915         case 0x02:
 916                 /* Not Ready */
 917                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 918                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 919                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 920                                 srb->sense_buf[0], srb->sense_buf[2],
 921                                 srb->sense_buf[12], srb->sense_buf[13]);
 922                         return USB_STOR_TRANSPORT_FAILED;
 923                 } else {
 924                         mdelay(100);
 925                         goto do_retry;
 926                 }
 927                 break;
 928         default:
 929                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 930                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 931                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 932                                 srb->sense_buf[2], srb->sense_buf[12],
 933                                 srb->sense_buf[13]);
 934                         return USB_STOR_TRANSPORT_FAILED;
 935                 } else
 936                         goto do_retry;
 937                 break;
 938         }
 939         return USB_STOR_TRANSPORT_FAILED;
 940 }
 941
 942 static void usb_stor_set_max_xfer_blk(struct usb_device *udev,
 943                                       struct us_data *us)
 944 {
 945         unsigned short blk;
 946         size_t __maybe_unused size;
 947         int __maybe_unused ret;
 948
 949 #ifndef CONFIG_DM_USB
 950 #ifdef CONFIG_USB_EHCI_HCD
 951         /*
 952          * The U-Boot EHCI driver can handle any transfer length as long as
 953          * there is enough free heap space left, but the SCSI READ(10) and
 954          * WRITE(10) commands are limited to 65535 blocks.
 955          */
 956         blk = USHRT_MAX;
 957 #else
 958         blk = 20;
 959 #endif
 960 #else
 961         ret = usb_get_max_xfer_size(udev, (size_t *)&size);
 962         if (ret < 0) {
 963                 /* unimplemented, let's use default 20 */
 964                 blk = 20;
 965         } else {
 966                 if (size > USHRT_MAX * 512)
 967                         size = USHRT_MAX * 512;
 968                 blk = size / 512;
 969         }
 970 #endif
 971
 972         us->max_xfer_blk = blk;
 973 }
 974
 975 static int usb_inquiry(struct scsi_cmd *srb, struct us_data *ss)
 976 {
 977         int retry, i;
 978         retry = 5;
 979         do {
 980                 memset(&srb->cmd[0], 0, 12);
 981                 srb->cmd[0] = SCSI_INQUIRY;
 982                 srb->cmd[1] = srb->lun << 5;
 983                 srb->cmd[4] = 36;
 984                 srb->datalen = 36;
 985                 srb->cmdlen = 12;
 986                 i = ss->transport(srb, ss);
 987                 debug("inquiry returns %d\n", i);
 988                 if (i == 0)
 989                         break;
 990         } while (--retry);
 991
 992         if (!retry) {
 993                 printf("error in inquiry\n");
 994                 return -1;
 995         }
 996         return 0;
 997 }
 998
 999 static int usb_request_sense(struct scsi_cmd *srb, struct us_data *ss)
1000 {
1001         char *ptr;
1002
1003         ptr = (char *)srb->pdata;
1004         memset(&srb->cmd[0], 0, 12);
1005         srb->cmd[0] = SCSI_REQ_SENSE;
1006         srb->cmd[1] = srb->lun << 5;
1007         srb->cmd[4] = 18;
1008         srb->datalen = 18;
1009         srb->pdata = &srb->sense_buf[0];
1010         srb->cmdlen = 12;
1011         ss->transport(srb, ss);
1012         debug("Request Sense returned %02X %02X %02X\n",
1013               srb->sense_buf[2], srb->sense_buf[12],
1014               srb->sense_buf[13]);
1015         srb->pdata = (uchar *)ptr;
1016         return 0;
1017 }
1018
1019 static int usb_test_unit_ready(struct scsi_cmd *srb, struct us_data *ss)
1020 {
1021         int retries = 10;
1022
1023         do {
1024                 memset(&srb->cmd[0], 0, 12);
1025                 srb->cmd[0] = SCSI_TST_U_RDY;
1026                 srb->cmd[1] = srb->lun << 5;
1027                 srb->datalen = 0;
1028                 srb->cmdlen = 12;
1029                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
1030                         ss->flags |= USB_READY;
1031                         return 0;
1032                 }
1033                 usb_request_sense(srb, ss);
1034                 /*
1035                  * Check the Key Code Qualifier, if it matches
1036                  * "Not Ready - medium not present"
1037                  * (the sense Key equals 0x2 and the ASC is 0x3a)
1038                  * return immediately as the medium being absent won't change
1039                  * unless there is a user action.
1040                  */
1041                 if ((srb->sense_buf[2] == 0x02) &&
1042                     (srb->sense_buf[12] == 0x3a))
1043                         return -1;
1044                 mdelay(100);
1045         } while (retries--);
1046
1047         return -1;
1048 }
1049
1050 static int usb_read_capacity(struct scsi_cmd *srb, struct us_data *ss)
1051 {
1052         int retry;
1053         /* XXX retries */
1054         retry = 3;
1055         do {
1056                 memset(&srb->cmd[0], 0, 12);
1057                 srb->cmd[0] = SCSI_RD_CAPAC;
1058                 srb->cmd[1] = srb->lun << 5;
1059                 srb->datalen = 8;
1060                 srb->cmdlen = 12;
1061                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
1062                         return 0;
1063         } while (retry--);
1064
1065         return -1;
1066 }
1067
1068 static int usb_read_10(struct scsi_cmd *srb, struct us_data *ss,
1069                        unsigned long start, unsigned short blocks)
1070 {
1071         memset(&srb->cmd[0], 0, 12);
1072         srb->cmd[0] = SCSI_READ10;
1073         srb->cmd[1] = srb->lun << 5;
1074         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1075         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1076         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1077         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1078         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1079         srb->cmd[8] = (unsigned char) blocks & 0xff;
1080         srb->cmdlen = 12;
1081         debug("read10: start %lx blocks %x\n", start, blocks);
1082         return ss->transport(srb, ss);
1083 }
1084
1085 static int usb_write_10(struct scsi_cmd *srb, struct us_data *ss,
1086                         unsigned long start, unsigned short blocks)
1087 {
1088         memset(&srb->cmd[0], 0, 12);
1089         srb->cmd[0] = SCSI_WRITE10;
1090         srb->cmd[1] = srb->lun << 5;
1091         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1092         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1093         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1094         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1095         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1096         srb->cmd[8] = (unsigned char) blocks & 0xff;
1097         srb->cmdlen = 12;
1098         debug("write10: start %lx blocks %x\n", start, blocks);
1099         return ss->transport(srb, ss);
1100 }
1101
1102
1103 #ifdef CONFIG_USB_BIN_FIXUP
1104 /*
1105  * Some USB storage devices queried for SCSI identification data respond with
1106  * binary strings, which if output to the console freeze the terminal. The
1107  * workaround is to modify the vendor and product strings read from such
1108  * device with proper values (as reported by 'usb info').
1109  *
1110  * Vendor and product length limits are taken from the definition of
1111  * struct blk_desc in include/part.h.
1112  */
1113 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1114                                 unsigned char vendor[],
1115                                 unsigned char product[]) {
1116         const unsigned char max_vendor_len = 40;
1117         const unsigned char max_product_len = 20;
1118         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1119                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1120                 strncpy((char *)product, "Flash Media Cntrller",
1121                         max_product_len);
1122         }
1123 }
1124 #endif /* CONFIG_USB_BIN_FIXUP */
1125
1126 #ifdef CONFIG_BLK
1127 static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
1128                                    lbaint_t blkcnt, void *buffer)
1129 #else
1130 static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
1131                                    lbaint_t blkcnt, void *buffer)
1132 #endif
1133 {
1134         lbaint_t start, blks;
1135         uintptr_t buf_addr;
1136         unsigned short smallblks;
1137         struct usb_device *udev;
1138         struct us_data *ss;
1139         int retry;
1140         struct scsi_cmd *srb = &usb_ccb;
1141 #ifdef CONFIG_BLK
1142         struct blk_desc *block_dev;
1143 #endif
1144
1145         if (blkcnt == 0)
1146                 return 0;
1147         /* Setup  device */
1148 #ifdef CONFIG_BLK
1149         block_dev = dev_get_uclass_platdata(dev);
1150         udev = dev_get_parent_priv(dev_get_parent(dev));
1151         debug("\nusb_read: udev %d\n", block_dev->devnum);
1152 #else
1153         debug("\nusb_read: udev %d\n", block_dev->devnum);
1154         udev = usb_dev_desc[block_dev->devnum].priv;
1155         if (!udev) {
1156                 debug("%s: No device\n", __func__);
1157                 return 0;
1158         }
1159 #endif
1160         ss = (struct us_data *)udev->privptr;
1161
1162         usb_disable_asynch(1); /* asynch transfer not allowed */
1163         srb->lun = block_dev->lun;
1164         buf_addr = (uintptr_t)buffer;
1165         start = blknr;
1166         blks = blkcnt;
1167
1168         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
1169               PRIxPTR "\n", block_dev->devnum, start, blks, buf_addr);
1170
1171         do {
1172                 /* XXX need some comment here */
1173                 retry = 2;
1174                 srb->pdata = (unsigned char *)buf_addr;
1175                 if (blks > ss->max_xfer_blk)
1176                         smallblks = ss->max_xfer_blk;
1177                 else
1178                         smallblks = (unsigned short) blks;
1179 retry_it:
1180                 if (smallblks == ss->max_xfer_blk)
1181                         usb_show_progress();
1182                 srb->datalen = block_dev->blksz * smallblks;
1183                 srb->pdata = (unsigned char *)buf_addr;
1184                 if (usb_read_10(srb, ss, start, smallblks)) {
1185                         debug("Read ERROR\n");
1186                         usb_request_sense(srb, ss);
1187                         if (retry--)
1188                                 goto retry_it;
1189                         blkcnt -= blks;
1190                         break;
1191                 }
1192                 start += smallblks;
1193                 blks -= smallblks;
1194                 buf_addr += srb->datalen;
1195         } while (blks != 0);
1196         ss->flags &= ~USB_READY;
1197
1198         debug("usb_read: end startblk " LBAF
1199               ", blccnt %x buffer %" PRIxPTR "\n",
1200               start, smallblks, buf_addr);
1201
1202         usb_disable_asynch(0); /* asynch transfer allowed */
1203         if (blkcnt >= ss->max_xfer_blk)
1204                 debug("\n");
1205         return blkcnt;
1206 }
1207
1208 #ifdef CONFIG_BLK
1209 static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
1210                                     lbaint_t blkcnt, const void *buffer)
1211 #else
1212 static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
1213                                     lbaint_t blkcnt, const void *buffer)
1214 #endif
1215 {
1216         lbaint_t start, blks;
1217         uintptr_t buf_addr;
1218         unsigned short smallblks;
1219         struct usb_device *udev;
1220         struct us_data *ss;
1221         int retry;
1222         struct scsi_cmd *srb = &usb_ccb;
1223 #ifdef CONFIG_BLK
1224         struct blk_desc *block_dev;
1225 #endif
1226
1227         if (blkcnt == 0)
1228                 return 0;
1229
1230         /* Setup  device */
1231 #ifdef CONFIG_BLK
1232         block_dev = dev_get_uclass_platdata(dev);
1233         udev = dev_get_parent_priv(dev_get_parent(dev));
1234         debug("\nusb_read: udev %d\n", block_dev->devnum);
1235 #else
1236         debug("\nusb_read: udev %d\n", block_dev->devnum);
1237         udev = usb_dev_desc[block_dev->devnum].priv;
1238         if (!udev) {
1239                 debug("%s: No device\n", __func__);
1240                 return 0;
1241         }
1242 #endif
1243         ss = (struct us_data *)udev->privptr;
1244
1245         usb_disable_asynch(1); /* asynch transfer not allowed */
1246
1247         srb->lun = block_dev->lun;
1248         buf_addr = (uintptr_t)buffer;
1249         start = blknr;
1250         blks = blkcnt;
1251
1252         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
1253               PRIxPTR "\n", block_dev->devnum, start, blks, buf_addr);
1254
1255         do {
1256                 /* If write fails retry for max retry count else
1257                  * return with number of blocks written successfully.
1258                  */
1259                 retry = 2;
1260                 srb->pdata = (unsigned char *)buf_addr;
1261                 if (blks > ss->max_xfer_blk)
1262                         smallblks = ss->max_xfer_blk;
1263                 else
1264                         smallblks = (unsigned short) blks;
1265 retry_it:
1266                 if (smallblks == ss->max_xfer_blk)
1267                         usb_show_progress();
1268                 srb->datalen = block_dev->blksz * smallblks;
1269                 srb->pdata = (unsigned char *)buf_addr;
1270                 if (usb_write_10(srb, ss, start, smallblks)) {
1271                         debug("Write ERROR\n");
1272                         usb_request_sense(srb, ss);
1273                         if (retry--)
1274                                 goto retry_it;
1275                         blkcnt -= blks;
1276                         break;
1277                 }
1278                 start += smallblks;
1279                 blks -= smallblks;
1280                 buf_addr += srb->datalen;
1281         } while (blks != 0);
1282         ss->flags &= ~USB_READY;
1283
1284         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1285               PRIxPTR "\n", start, smallblks, buf_addr);
1286
1287         usb_disable_asynch(0); /* asynch transfer allowed */
1288         if (blkcnt >= ss->max_xfer_blk)
1289                 debug("\n");
1290         return blkcnt;
1291
1292 }
1293
1294 /* Probe to see if a new device is actually a Storage device */
1295 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1296                       struct us_data *ss)
1297 {
1298         struct usb_interface *iface;
1299         int i;
1300         struct usb_endpoint_descriptor *ep_desc;
1301         unsigned int flags = 0;
1302
1303         /* let's examine the device now */
1304         iface = &dev->config.if_desc[ifnum];
1305
1306         if (dev->descriptor.bDeviceClass != 0 ||
1307                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1308                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1309                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1310                 debug("Not mass storage\n");
1311                 /* if it's not a mass storage, we go no further */
1312                 return 0;
1313         }
1314
1315         memset(ss, 0, sizeof(struct us_data));
1316
1317         /* At this point, we know we've got a live one */
1318         debug("\n\nUSB Mass Storage device detected\n");
1319
1320         /* Initialize the us_data structure with some useful info */
1321         ss->flags = flags;
1322         ss->ifnum = ifnum;
1323         ss->pusb_dev = dev;
1324         ss->attention_done = 0;
1325         ss->subclass = iface->desc.bInterfaceSubClass;
1326         ss->protocol = iface->desc.bInterfaceProtocol;
1327
1328         /* set the handler pointers based on the protocol */
1329         debug("Transport: ");
1330         switch (ss->protocol) {
1331         case US_PR_CB:
1332                 debug("Control/Bulk\n");
1333                 ss->transport = usb_stor_CB_transport;
1334                 ss->transport_reset = usb_stor_CB_reset;
1335                 break;
1336
1337         case US_PR_CBI:
1338                 debug("Control/Bulk/Interrupt\n");
1339                 ss->transport = usb_stor_CB_transport;
1340                 ss->transport_reset = usb_stor_CB_reset;
1341                 break;
1342         case US_PR_BULK:
1343                 debug("Bulk/Bulk/Bulk\n");
1344                 ss->transport = usb_stor_BBB_transport;
1345                 ss->transport_reset = usb_stor_BBB_reset;
1346                 break;
1347         default:
1348                 printf("USB Storage Transport unknown / not yet implemented\n");
1349                 return 0;
1350                 break;
1351         }
1352
1353         /*
1354          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1355          * An optional interrupt is OK (necessary for CBI protocol).
1356          * We will ignore any others.
1357          */
1358         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1359                 ep_desc = &iface->ep_desc[i];
1360                 /* is it an BULK endpoint? */
1361                 if ((ep_desc->bmAttributes &
1362                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1363                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1364                                 ss->ep_in = ep_desc->bEndpointAddress &
1365                                                 USB_ENDPOINT_NUMBER_MASK;
1366                         else
1367                                 ss->ep_out =
1368                                         ep_desc->bEndpointAddress &
1369                                         USB_ENDPOINT_NUMBER_MASK;
1370                 }
1371
1372                 /* is it an interrupt endpoint? */
1373                 if ((ep_desc->bmAttributes &
1374                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1375                         ss->ep_int = ep_desc->bEndpointAddress &
1376                                                 USB_ENDPOINT_NUMBER_MASK;
1377                         ss->irqinterval = ep_desc->bInterval;
1378                 }
1379         }
1380         debug("Endpoints In %d Out %d Int %d\n",
1381               ss->ep_in, ss->ep_out, ss->ep_int);
1382
1383         /* Do some basic sanity checks, and bail if we find a problem */
1384         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1385             !ss->ep_in || !ss->ep_out ||
1386             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1387                 debug("Problems with device\n");
1388                 return 0;
1389         }
1390         /* set class specific stuff */
1391         /* We only handle certain protocols.  Currently, these are
1392          * the only ones.
1393          * The SFF8070 accepts the requests used in u-boot
1394          */
1395         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1396             ss->subclass != US_SC_8070) {
1397                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1398                 return 0;
1399         }
1400         if (ss->ep_int) {
1401                 /* we had found an interrupt endpoint, prepare irq pipe
1402                  * set up the IRQ pipe and handler
1403                  */
1404                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1405                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1406                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1407                 dev->irq_handle = usb_stor_irq;
1408         }
1409
1410         /* Set the maximum transfer size per host controller setting */
1411         usb_stor_set_max_xfer_blk(dev, ss);
1412
1413         dev->privptr = (void *)ss;
1414         return 1;
1415 }
1416
1417 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1418                       struct blk_desc *dev_desc)
1419 {
1420         unsigned char perq, modi;
1421         ALLOC_CACHE_ALIGN_BUFFER(u32, cap, 2);
1422         ALLOC_CACHE_ALIGN_BUFFER(u8, usb_stor_buf, 36);
1423         u32 capacity, blksz;
1424         struct scsi_cmd *pccb = &usb_ccb;
1425
1426         pccb->pdata = usb_stor_buf;
1427
1428         dev_desc->target = dev->devnum;
1429         pccb->lun = dev_desc->lun;
1430         debug(" address %d\n", dev_desc->target);
1431
1432         if (usb_inquiry(pccb, ss)) {
1433                 debug("%s: usb_inquiry() failed\n", __func__);
1434                 return -1;
1435         }
1436
1437         perq = usb_stor_buf[0];
1438         modi = usb_stor_buf[1];
1439
1440         /*
1441          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1442          * they would not respond to test_unit_ready .
1443          */
1444         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1445                 debug("%s: unknown/unsupported device\n", __func__);
1446                 return 0;
1447         }
1448         if ((modi&0x80) == 0x80) {
1449                 /* drive is removable */
1450                 dev_desc->removable = 1;
1451         }
1452         memcpy(dev_desc->vendor, (const void *)&usb_stor_buf[8], 8);
1453         memcpy(dev_desc->product, (const void *)&usb_stor_buf[16], 16);
1454         memcpy(dev_desc->revision, (const void *)&usb_stor_buf[32], 4);
1455         dev_desc->vendor[8] = 0;
1456         dev_desc->product[16] = 0;
1457         dev_desc->revision[4] = 0;
1458 #ifdef CONFIG_USB_BIN_FIXUP
1459         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1460                       (uchar *)dev_desc->product);
1461 #endif /* CONFIG_USB_BIN_FIXUP */
1462         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1463               usb_stor_buf[3]);
1464         if (usb_test_unit_ready(pccb, ss)) {
1465                 printf("Device NOT ready\n"
1466                        "   Request Sense returned %02X %02X %02X\n",
1467                        pccb->sense_buf[2], pccb->sense_buf[12],
1468                        pccb->sense_buf[13]);
1469                 if (dev_desc->removable == 1)
1470                         dev_desc->type = perq;
1471                 return 0;
1472         }
1473         pccb->pdata = (unsigned char *)cap;
1474         memset(pccb->pdata, 0, 8);
1475         if (usb_read_capacity(pccb, ss) != 0) {
1476                 printf("READ_CAP ERROR\n");
1477                 cap[0] = 2880;
1478                 cap[1] = 0x200;
1479         }
1480         ss->flags &= ~USB_READY;
1481         debug("Read Capacity returns: 0x%08x, 0x%08x\n", cap[0], cap[1]);
1482 #if 0
1483         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1484                 cap[0] >>= 16;
1485
1486         cap[0] = cpu_to_be32(cap[0]);
1487         cap[1] = cpu_to_be32(cap[1]);
1488 #endif
1489
1490         capacity = be32_to_cpu(cap[0]) + 1;
1491         blksz = be32_to_cpu(cap[1]);
1492
1493         debug("Capacity = 0x%08x, blocksz = 0x%08x\n", capacity, blksz);
1494         dev_desc->lba = capacity;
1495         dev_desc->blksz = blksz;
1496         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1497         dev_desc->type = perq;
1498         debug(" address %d\n", dev_desc->target);
1499
1500         return 1;
1501 }
1502
1503 #ifdef CONFIG_DM_USB
1504
1505 static int usb_mass_storage_probe(struct udevice *dev)
1506 {
1507         struct usb_device *udev = dev_get_parent_priv(dev);
1508         int ret;
1509
1510         usb_disable_asynch(1); /* asynch transfer not allowed */
1511         ret = usb_stor_probe_device(udev);
1512         usb_disable_asynch(0); /* asynch transfer allowed */
1513
1514         return ret;
1515 }
1516
1517 static const struct udevice_id usb_mass_storage_ids[] = {
1518         { .compatible = "usb-mass-storage" },
1519         { }
1520 };
1521
1522 U_BOOT_DRIVER(usb_mass_storage) = {
1523         .name   = "usb_mass_storage",
1524         .id     = UCLASS_MASS_STORAGE,
1525         .of_match = usb_mass_storage_ids,
1526         .probe = usb_mass_storage_probe,
1527 #ifdef CONFIG_BLK
1528         .platdata_auto_alloc_size       = sizeof(struct us_data),
1529 #endif
1530 };
1531
1532 UCLASS_DRIVER(usb_mass_storage) = {
1533         .id             = UCLASS_MASS_STORAGE,
1534         .name           = "usb_mass_storage",
1535 };
1536
1537 static const struct usb_device_id mass_storage_id_table[] = {
1538         {
1539                 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1540                 .bInterfaceClass = USB_CLASS_MASS_STORAGE
1541         },
1542         { }             /* Terminating entry */
1543 };
1544
1545 U_BOOT_USB_DEVICE(usb_mass_storage, mass_storage_id_table);
1546 #endif
1547
1548 #ifdef CONFIG_BLK
1549 static const struct blk_ops usb_storage_ops = {
1550         .read   = usb_stor_read,
1551         .write  = usb_stor_write,
1552 };
1553
1554 U_BOOT_DRIVER(usb_storage_blk) = {
1555         .name           = "usb_storage_blk",
1556         .id             = UCLASS_BLK,
1557         .ops            = &usb_storage_ops,
1558 };
1559 #else
1560 U_BOOT_LEGACY_BLK(usb) = {
1561         .if_typename    = "usb",
1562         .if_type        = IF_TYPE_USB,
1563         .max_devs       = USB_MAX_STOR_DEV,
1564         .desc           = usb_dev_desc,
1565 };
1566 #endif