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  * See file CREDITS for list of people who contributed to this
  20  * project.
  21  *
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License as
  24  * published by the Free Software Foundation; either version 2 of
  25  * the License, or (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  35  * MA 02111-1307 USA
  36  *
  37  */
  38
  39 /* Note:
  40  * Currently only the CBI transport protocoll has been implemented, and it
  41  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
  42  * transport protocoll may work as well.
  43  */
  44 /*
  45  * New Note:
  46  * Support for USB Mass Storage Devices (BBB) has been added. It has
  47  * only been tested with USB memory sticks.
  48  */
  49
  50
  51 #include <common.h>
  52 #include <command.h>
  53 #include <asm/byteorder.h>
  54 #include <asm/processor.h>
  55
  56 #include <part.h>
  57 #include <usb.h>
  58
  59 #undef BBB_COMDAT_TRACE
  60 #undef BBB_XPORT_TRACE
  61
  62 #include <scsi.h>
  63 /* direction table -- this indicates the direction of the data
  64  * transfer for each command code -- a 1 indicates input
  65  */
  66 static const unsigned char us_direction[256/8] = {
  67         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  68         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  69         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  70         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  71 };
  72 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  73
  74 static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
  75
  76 /*
  77  * CBI style
  78  */
  79
  80 #define US_CBI_ADSC             0
  81
  82 /*
  83  * BULK only
  84  */
  85 #define US_BBB_RESET            0xff
  86 #define US_BBB_GET_MAX_LUN      0xfe
  87
  88 /* Command Block Wrapper */
  89 typedef struct {
  90         __u32           dCBWSignature;
  91 #       define CBWSIGNATURE     0x43425355
  92         __u32           dCBWTag;
  93         __u32           dCBWDataTransferLength;
  94         __u8            bCBWFlags;
  95 #       define CBWFLAGS_OUT     0x00
  96 #       define CBWFLAGS_IN      0x80
  97         __u8            bCBWLUN;
  98         __u8            bCDBLength;
  99 #       define CBWCDBLENGTH     16
 100         __u8            CBWCDB[CBWCDBLENGTH];
 101 } umass_bbb_cbw_t;
 102 #define UMASS_BBB_CBW_SIZE      31
 103 static __u32 CBWTag;
 104
 105 /* Command Status Wrapper */
 106 typedef struct {
 107         __u32           dCSWSignature;
 108 #       define CSWSIGNATURE     0x53425355
 109         __u32           dCSWTag;
 110         __u32           dCSWDataResidue;
 111         __u8            bCSWStatus;
 112 #       define CSWSTATUS_GOOD   0x0
 113 #       define CSWSTATUS_FAILED 0x1
 114 #       define CSWSTATUS_PHASE  0x2
 115 } umass_bbb_csw_t;
 116 #define UMASS_BBB_CSW_SIZE      13
 117
 118 #define USB_MAX_STOR_DEV 5
 119 static int usb_max_devs; /* number of highest available usb device */
 120
 121 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
 122
 123 struct us_data;
 124 typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
 125 typedef int (*trans_reset)(struct us_data *data);
 126
 127 struct us_data {
 128         struct usb_device *pusb_dev;     /* this usb_device */
 129
 130         unsigned int    flags;                  /* from filter initially */
 131 #       define USB_READY        (1 << 0)
 132         unsigned char   ifnum;                  /* interface number */
 133         unsigned char   ep_in;                  /* in endpoint */
 134         unsigned char   ep_out;                 /* out ....... */
 135         unsigned char   ep_int;                 /* interrupt . */
 136         unsigned char   subclass;               /* as in overview */
 137         unsigned char   protocol;               /* .............. */
 138         unsigned char   attention_done;         /* force attn on first cmd */
 139         unsigned short  ip_data;                /* interrupt data */
 140         int             action;                 /* what to do */
 141         int             ip_wanted;              /* needed */
 142         int             *irq_handle;            /* for USB int requests */
 143         unsigned int    irqpipe;                /* pipe for release_irq */
 144         unsigned char   irqmaxp;                /* max packed for irq Pipe */
 145         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
 146         ccb             *srb;                   /* current srb */
 147         trans_reset     transport_reset;        /* reset routine */
 148         trans_cmnd      transport;              /* transport routine */
 149 };
 150
 151 #ifdef CONFIG_USB_EHCI
 152 /*
 153  * The U-Boot EHCI driver can handle any transfer length as long as there is
 154  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
 155  * limited to 65535 blocks.
 156  */
 157 #define USB_MAX_XFER_BLK        65535
 158 #else
 159 #define USB_MAX_XFER_BLK        20
 160 #endif
 161
 162 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 163
 164
 165 #define USB_STOR_TRANSPORT_GOOD    0
 166 #define USB_STOR_TRANSPORT_FAILED -1
 167 #define USB_STOR_TRANSPORT_ERROR  -2
 168
 169 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
 170                       block_dev_desc_t *dev_desc);
 171 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 172                       struct us_data *ss);
 173 unsigned long usb_stor_read(int device, unsigned long blknr,
 174                             lbaint_t blkcnt, void *buffer);
 175 unsigned long usb_stor_write(int device, unsigned long blknr,
 176                              lbaint_t blkcnt, const void *buffer);
 177 struct usb_device * usb_get_dev_index(int index);
 178 void uhci_show_temp_int_td(void);
 179
 180 #ifdef CONFIG_PARTITIONS
 181 block_dev_desc_t *usb_stor_get_dev(int index)
 182 {
 183         return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
 184 }
 185 #endif
 186
 187 static void usb_show_progress(void)
 188 {
 189         debug(".");
 190 }
 191
 192 /*******************************************************************************
 193  * show info on storage devices; 'usb start/init' must be invoked earlier
 194  * as we only retrieve structures populated during devices initialization
 195  */
 196 int usb_stor_info(void)
 197 {
 198         int i;
 199
 200         if (usb_max_devs > 0) {
 201                 for (i = 0; i < usb_max_devs; i++) {
 202                         printf("  Device %d: ", i);
 203                         dev_print(&usb_dev_desc[i]);
 204                 }
 205                 return 0;
 206         }
 207
 208         printf("No storage devices, perhaps not 'usb start'ed..?\n");
 209         return 1;
 210 }
 211
 212 static unsigned int usb_get_max_lun(struct us_data *us)
 213 {
 214         int len;
 215         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
 216         len = usb_control_msg(us->pusb_dev,
 217                               usb_rcvctrlpipe(us->pusb_dev, 0),
 218                               US_BBB_GET_MAX_LUN,
 219                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 220                               0, us->ifnum,
 221                               result, sizeof(char),
 222                               USB_CNTL_TIMEOUT * 5);
 223         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
 224         return (len > 0) ? *result : 0;
 225 }
 226
 227 /*******************************************************************************
 228  * scan the usb and reports device info
 229  * to the user if mode = 1
 230  * returns current device or -1 if no
 231  */
 232 int usb_stor_scan(int mode)
 233 {
 234         unsigned char i;
 235         struct usb_device *dev;
 236
 237         if (mode == 1)
 238                 printf("       scanning usb for storage devices... ");
 239
 240         usb_disable_asynch(1); /* asynch transfer not allowed */
 241
 242         for (i = 0; i < USB_MAX_STOR_DEV; i++) {
 243                 memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
 244                 usb_dev_desc[i].if_type = IF_TYPE_USB;
 245                 usb_dev_desc[i].dev = i;
 246                 usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
 247                 usb_dev_desc[i].target = 0xff;
 248                 usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
 249                 usb_dev_desc[i].block_read = usb_stor_read;
 250                 usb_dev_desc[i].block_write = usb_stor_write;
 251         }
 252
 253         usb_max_devs = 0;
 254         for (i = 0; i < USB_MAX_DEVICE; i++) {
 255                 dev = usb_get_dev_index(i); /* get device */
 256                 debug("i=%d\n", i);
 257                 if (dev == NULL)
 258                         break; /* no more devices available */
 259
 260                 if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
 261                         /* OK, it's a storage device.  Iterate over its LUNs
 262                          * and populate `usb_dev_desc'.
 263                          */
 264                         int lun, max_lun, start = usb_max_devs;
 265
 266                         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 267                         for (lun = 0;
 268                              lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
 269                              lun++) {
 270                                 usb_dev_desc[usb_max_devs].lun = lun;
 271                                 if (usb_stor_get_info(dev, &usb_stor[start],
 272                                     &usb_dev_desc[usb_max_devs]) == 1) {
 273                                         usb_max_devs++;
 274                                 }
 275                         }
 276                 }
 277                 /* if storage device */
 278                 if (usb_max_devs == USB_MAX_STOR_DEV) {
 279                         printf("max USB Storage Device reached: %d stopping\n",
 280                                 usb_max_devs);
 281                         break;
 282                 }
 283         } /* for */
 284
 285         usb_disable_asynch(0); /* asynch transfer allowed */
 286         printf("%d Storage Device(s) found\n", usb_max_devs);
 287         if (usb_max_devs > 0)
 288                 return 0;
 289         return -1;
 290 }
 291
 292 static int usb_stor_irq(struct usb_device *dev)
 293 {
 294         struct us_data *us;
 295         us = (struct us_data *)dev->privptr;
 296
 297         if (us->ip_wanted)
 298                 us->ip_wanted = 0;
 299         return 0;
 300 }
 301
 302
 303 #ifdef  DEBUG
 304
 305 static void usb_show_srb(ccb *pccb)
 306 {
 307         int i;
 308         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
 309         for (i = 0; i < 12; i++)
 310                 printf("%02X ", pccb->cmd[i]);
 311         printf("\n");
 312 }
 313
 314 static void display_int_status(unsigned long tmp)
 315 {
 316         printf("Status: %s %s %s %s %s %s %s\n",
 317                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 318                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 319                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 320                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 321                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 322                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 323                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 324 }
 325 #endif
 326 /***********************************************************************
 327  * Data transfer routines
 328  ***********************************************************************/
 329
 330 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 331 {
 332         int max_size;
 333         int this_xfer;
 334         int result;
 335         int partial;
 336         int maxtry;
 337         int stat;
 338
 339         /* determine the maximum packet size for these transfers */
 340         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 341
 342         /* while we have data left to transfer */
 343         while (length) {
 344
 345                 /* calculate how long this will be -- maximum or a remainder */
 346                 this_xfer = length > max_size ? max_size : length;
 347                 length -= this_xfer;
 348
 349                 /* setup the retry counter */
 350                 maxtry = 10;
 351
 352                 /* set up the transfer loop */
 353                 do {
 354                         /* transfer the data */
 355                         debug("Bulk xfer 0x%x(%d) try #%d\n",
 356                               (unsigned int)buf, this_xfer, 11 - maxtry);
 357                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 358                                               this_xfer, &partial,
 359                                               USB_CNTL_TIMEOUT * 5);
 360                         debug("bulk_msg returned %d xferred %d/%d\n",
 361                               result, partial, this_xfer);
 362                         if (us->pusb_dev->status != 0) {
 363                                 /* if we stall, we need to clear it before
 364                                  * we go on
 365                                  */
 366 #ifdef DEBUG
 367                                 display_int_status(us->pusb_dev->status);
 368 #endif
 369                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 370                                         debug("stalled ->clearing endpoint" \
 371                                               "halt for pipe 0x%x\n", pipe);
 372                                         stat = us->pusb_dev->status;
 373                                         usb_clear_halt(us->pusb_dev, pipe);
 374                                         us->pusb_dev->status = stat;
 375                                         if (this_xfer == partial) {
 376                                                 debug("bulk transferred" \
 377                                                       "with error %lX," \
 378                                                       " but data ok\n",
 379                                                       us->pusb_dev->status);
 380                                                 return 0;
 381                                         }
 382                                         else
 383                                                 return result;
 384                                 }
 385                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 386                                         debug("Device NAKed bulk_msg\n");
 387                                         return result;
 388                                 }
 389                                 debug("bulk transferred with error");
 390                                 if (this_xfer == partial) {
 391                                         debug(" %ld, but data ok\n",
 392                                               us->pusb_dev->status);
 393                                         return 0;
 394                                 }
 395                                 /* if our try counter reaches 0, bail out */
 396                                         debug(" %ld, data %d\n",
 397                                               us->pusb_dev->status, partial);
 398                                 if (!maxtry--)
 399                                                 return result;
 400                         }
 401                         /* update to show what data was transferred */
 402                         this_xfer -= partial;
 403                         buf += partial;
 404                         /* continue until this transfer is done */
 405                 } while (this_xfer);
 406         }
 407
 408         /* if we get here, we're done and successful */
 409         return 0;
 410 }
 411
 412 static int usb_stor_BBB_reset(struct us_data *us)
 413 {
 414         int result;
 415         unsigned int pipe;
 416
 417         /*
 418          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
 419          *
 420          * For Reset Recovery the host shall issue in the following order:
 421          * a) a Bulk-Only Mass Storage Reset
 422          * b) a Clear Feature HALT to the Bulk-In endpoint
 423          * c) a Clear Feature HALT to the Bulk-Out endpoint
 424          *
 425          * This is done in 3 steps.
 426          *
 427          * If the reset doesn't succeed, the device should be port reset.
 428          *
 429          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
 430          */
 431         debug("BBB_reset\n");
 432         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 433                                  US_BBB_RESET,
 434                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 435                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
 436
 437         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 438                 debug("RESET:stall\n");
 439                 return -1;
 440         }
 441
 442         /* long wait for reset */
 443         mdelay(150);
 444         debug("BBB_reset result %d: status %lX reset\n",
 445               result, us->pusb_dev->status);
 446         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 447         result = usb_clear_halt(us->pusb_dev, pipe);
 448         /* long wait for reset */
 449         mdelay(150);
 450         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
 451               result, us->pusb_dev->status);
 452         /* long wait for reset */
 453         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 454         result = usb_clear_halt(us->pusb_dev, pipe);
 455         mdelay(150);
 456         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
 457               result, us->pusb_dev->status);
 458         debug("BBB_reset done\n");
 459         return 0;
 460 }
 461
 462 /* FIXME: this reset function doesn't really reset the port, and it
 463  * should. Actually it should probably do what it's doing here, and
 464  * reset the port physically
 465  */
 466 static int usb_stor_CB_reset(struct us_data *us)
 467 {
 468         unsigned char cmd[12];
 469         int result;
 470
 471         debug("CB_reset\n");
 472         memset(cmd, 0xff, sizeof(cmd));
 473         cmd[0] = SCSI_SEND_DIAG;
 474         cmd[1] = 4;
 475         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 476                                  US_CBI_ADSC,
 477                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 478                                  0, us->ifnum, cmd, sizeof(cmd),
 479                                  USB_CNTL_TIMEOUT * 5);
 480
 481         /* long wait for reset */
 482         mdelay(1500);
 483         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
 484               result, us->pusb_dev->status);
 485         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 486         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 487
 488         debug("CB_reset done\n");
 489         return 0;
 490 }
 491
 492 /*
 493  * Set up the command for a BBB device. Note that the actual SCSI
 494  * command is copied into cbw.CBWCDB.
 495  */
 496 static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
 497 {
 498         int result;
 499         int actlen;
 500         int dir_in;
 501         unsigned int pipe;
 502         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw, 1);
 503
 504         dir_in = US_DIRECTION(srb->cmd[0]);
 505
 506 #ifdef BBB_COMDAT_TRACE
 507         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
 508                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 509                 srb->pdata);
 510         if (srb->cmdlen) {
 511                 for (result = 0; result < srb->cmdlen; result++)
 512                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 513                 printf("\n");
 514         }
 515 #endif
 516         /* sanity checks */
 517         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 518                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
 519                 return -1;
 520         }
 521
 522         /* always OUT to the ep */
 523         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 524
 525         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 526         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 527         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 528         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 529         cbw->bCBWLUN = srb->lun;
 530         cbw->bCDBLength = srb->cmdlen;
 531         /* copy the command data into the CBW command data buffer */
 532         /* DST SRC LEN!!! */
 533         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 534         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 535                               &actlen, USB_CNTL_TIMEOUT * 5);
 536         if (result < 0)
 537                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 538         return result;
 539 }
 540
 541 /* FIXME: we also need a CBI_command which sets up the completion
 542  * interrupt, and waits for it
 543  */
 544 static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 545 {
 546         int result = 0;
 547         int dir_in, retry;
 548         unsigned int pipe;
 549         unsigned long status;
 550
 551         retry = 5;
 552         dir_in = US_DIRECTION(srb->cmd[0]);
 553
 554         if (dir_in)
 555                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 556         else
 557                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 558
 559         while (retry--) {
 560                 debug("CBI gets a command: Try %d\n", 5 - retry);
 561 #ifdef DEBUG
 562                 usb_show_srb(srb);
 563 #endif
 564                 /* let's send the command via the control pipe */
 565                 result = usb_control_msg(us->pusb_dev,
 566                                          usb_sndctrlpipe(us->pusb_dev , 0),
 567                                          US_CBI_ADSC,
 568                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 569                                          0, us->ifnum,
 570                                          srb->cmd, srb->cmdlen,
 571                                          USB_CNTL_TIMEOUT * 5);
 572                 debug("CB_transport: control msg returned %d, status %lX\n",
 573                       result, us->pusb_dev->status);
 574                 /* check the return code for the command */
 575                 if (result < 0) {
 576                         if (us->pusb_dev->status & USB_ST_STALLED) {
 577                                 status = us->pusb_dev->status;
 578                                 debug(" stall during command found," \
 579                                       " clear pipe\n");
 580                                 usb_clear_halt(us->pusb_dev,
 581                                               usb_sndctrlpipe(us->pusb_dev, 0));
 582                                 us->pusb_dev->status = status;
 583                         }
 584                         debug(" error during command %02X" \
 585                               " Stat = %lX\n", srb->cmd[0],
 586                               us->pusb_dev->status);
 587                         return result;
 588                 }
 589                 /* transfer the data payload for this command, if one exists*/
 590
 591                 debug("CB_transport: control msg returned %d," \
 592                       " direction is %s to go 0x%lx\n", result,
 593                       dir_in ? "IN" : "OUT", srb->datalen);
 594                 if (srb->datalen) {
 595                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 596                                                  srb->datalen);
 597                         debug("CBI attempted to transfer data," \
 598                               " result is %d status %lX, len %d\n",
 599                               result, us->pusb_dev->status,
 600                                 us->pusb_dev->act_len);
 601                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 602                                 break;
 603                 } /* if (srb->datalen) */
 604                 else
 605                         break;
 606         }
 607         /* return result */
 608
 609         return result;
 610 }
 611
 612
 613 static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 614 {
 615         int timeout;
 616
 617         us->ip_wanted = 1;
 618         submit_int_msg(us->pusb_dev, us->irqpipe,
 619                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 620         timeout = 1000;
 621         while (timeout--) {
 622                 if ((volatile int *) us->ip_wanted == NULL)
 623                         break;
 624                 mdelay(10);
 625         }
 626         if (us->ip_wanted) {
 627                 printf("        Did not get interrupt on CBI\n");
 628                 us->ip_wanted = 0;
 629                 return USB_STOR_TRANSPORT_ERROR;
 630         }
 631         debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
 632               us->ip_data, us->pusb_dev->irq_act_len,
 633               us->pusb_dev->irq_status);
 634         /* UFI gives us ASC and ASCQ, like a request sense */
 635         if (us->subclass == US_SC_UFI) {
 636                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 637                     srb->cmd[0] == SCSI_INQUIRY)
 638                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 639                 else if (us->ip_data)
 640                         return USB_STOR_TRANSPORT_FAILED;
 641                 else
 642                         return USB_STOR_TRANSPORT_GOOD;
 643         }
 644         /* otherwise, we interpret the data normally */
 645         switch (us->ip_data) {
 646         case 0x0001:
 647                 return USB_STOR_TRANSPORT_GOOD;
 648         case 0x0002:
 649                 return USB_STOR_TRANSPORT_FAILED;
 650         default:
 651                 return USB_STOR_TRANSPORT_ERROR;
 652         }                       /* switch */
 653         return USB_STOR_TRANSPORT_ERROR;
 654 }
 655
 656 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 657 #define USB_TRANSPORT_NOT_READY_RETRY 10
 658
 659 /* clear a stall on an endpoint - special for BBB devices */
 660 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 661 {
 662         int result;
 663
 664         /* ENDPOINT_HALT = 0, so set value to 0 */
 665         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 666                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
 667                                 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 668         return result;
 669 }
 670
 671 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
 672 {
 673         int result, retry;
 674         int dir_in;
 675         int actlen, data_actlen;
 676         unsigned int pipe, pipein, pipeout;
 677         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_csw_t, csw, 1);
 678 #ifdef BBB_XPORT_TRACE
 679         unsigned char *ptr;
 680         int index;
 681 #endif
 682
 683         dir_in = US_DIRECTION(srb->cmd[0]);
 684
 685         /* COMMAND phase */
 686         debug("COMMAND phase\n");
 687         result = usb_stor_BBB_comdat(srb, us);
 688         if (result < 0) {
 689                 debug("failed to send CBW status %ld\n",
 690                       us->pusb_dev->status);
 691                 usb_stor_BBB_reset(us);
 692                 return USB_STOR_TRANSPORT_FAILED;
 693         }
 694         if (!(us->flags & USB_READY))
 695                 mdelay(5);
 696         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 697         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 698         /* DATA phase + error handling */
 699         data_actlen = 0;
 700         /* no data, go immediately to the STATUS phase */
 701         if (srb->datalen == 0)
 702                 goto st;
 703         debug("DATA phase\n");
 704         if (dir_in)
 705                 pipe = pipein;
 706         else
 707                 pipe = pipeout;
 708         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 709                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 710         /* special handling of STALL in DATA phase */
 711         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 712                 debug("DATA:stall\n");
 713                 /* clear the STALL on the endpoint */
 714                 result = usb_stor_BBB_clear_endpt_stall(us,
 715                                         dir_in ? us->ep_in : us->ep_out);
 716                 if (result >= 0)
 717                         /* continue on to STATUS phase */
 718                         goto st;
 719         }
 720         if (result < 0) {
 721                 debug("usb_bulk_msg error status %ld\n",
 722                       us->pusb_dev->status);
 723                 usb_stor_BBB_reset(us);
 724                 return USB_STOR_TRANSPORT_FAILED;
 725         }
 726 #ifdef BBB_XPORT_TRACE
 727         for (index = 0; index < data_actlen; index++)
 728                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 729         printf("\n");
 730 #endif
 731         /* STATUS phase + error handling */
 732 st:
 733         retry = 0;
 734 again:
 735         debug("STATUS phase\n");
 736         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 737                                 &actlen, USB_CNTL_TIMEOUT*5);
 738
 739         /* special handling of STALL in STATUS phase */
 740         if ((result < 0) && (retry < 1) &&
 741             (us->pusb_dev->status & USB_ST_STALLED)) {
 742                 debug("STATUS:stall\n");
 743                 /* clear the STALL on the endpoint */
 744                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 745                 if (result >= 0 && (retry++ < 1))
 746                         /* do a retry */
 747                         goto again;
 748         }
 749         if (result < 0) {
 750                 debug("usb_bulk_msg error status %ld\n",
 751                       us->pusb_dev->status);
 752                 usb_stor_BBB_reset(us);
 753                 return USB_STOR_TRANSPORT_FAILED;
 754         }
 755 #ifdef BBB_XPORT_TRACE
 756         ptr = (unsigned char *)csw;
 757         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 758                 printf("ptr[%d] %#x ", index, ptr[index]);
 759         printf("\n");
 760 #endif
 761         /* misuse pipe to get the residue */
 762         pipe = le32_to_cpu(csw->dCSWDataResidue);
 763         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 764                 pipe = srb->datalen - data_actlen;
 765         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 766                 debug("!CSWSIGNATURE\n");
 767                 usb_stor_BBB_reset(us);
 768                 return USB_STOR_TRANSPORT_FAILED;
 769         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 770                 debug("!Tag\n");
 771                 usb_stor_BBB_reset(us);
 772                 return USB_STOR_TRANSPORT_FAILED;
 773         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 774                 debug(">PHASE\n");
 775                 usb_stor_BBB_reset(us);
 776                 return USB_STOR_TRANSPORT_FAILED;
 777         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 778                 debug("=PHASE\n");
 779                 usb_stor_BBB_reset(us);
 780                 return USB_STOR_TRANSPORT_FAILED;
 781         } else if (data_actlen > srb->datalen) {
 782                 debug("transferred %dB instead of %ldB\n",
 783                       data_actlen, srb->datalen);
 784                 return USB_STOR_TRANSPORT_FAILED;
 785         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 786                 debug("FAILED\n");
 787                 return USB_STOR_TRANSPORT_FAILED;
 788         }
 789
 790         return result;
 791 }
 792
 793 static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 794 {
 795         int result, status;
 796         ccb *psrb;
 797         ccb reqsrb;
 798         int retry, notready;
 799
 800         psrb = &reqsrb;
 801         status = USB_STOR_TRANSPORT_GOOD;
 802         retry = 0;
 803         notready = 0;
 804         /* issue the command */
 805 do_retry:
 806         result = usb_stor_CB_comdat(srb, us);
 807         debug("command / Data returned %d, status %lX\n",
 808               result, us->pusb_dev->status);
 809         /* if this is an CBI Protocol, get IRQ */
 810         if (us->protocol == US_PR_CBI) {
 811                 status = usb_stor_CBI_get_status(srb, us);
 812                 /* if the status is error, report it */
 813                 if (status == USB_STOR_TRANSPORT_ERROR) {
 814                         debug(" USB CBI Command Error\n");
 815                         return status;
 816                 }
 817                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 818                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 819                 if (!us->ip_data) {
 820                         /* if the status is good, report it */
 821                         if (status == USB_STOR_TRANSPORT_GOOD) {
 822                                 debug(" USB CBI Command Good\n");
 823                                 return status;
 824                         }
 825                 }
 826         }
 827         /* do we have to issue an auto request? */
 828         /* HERE we have to check the result */
 829         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 830                 debug("ERROR %lX\n", us->pusb_dev->status);
 831                 us->transport_reset(us);
 832                 return USB_STOR_TRANSPORT_ERROR;
 833         }
 834         if ((us->protocol == US_PR_CBI) &&
 835             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 836             (srb->cmd[0] == SCSI_INQUIRY))) {
 837                 /* do not issue an autorequest after request sense */
 838                 debug("No auto request and good\n");
 839                 return USB_STOR_TRANSPORT_GOOD;
 840         }
 841         /* issue an request_sense */
 842         memset(&psrb->cmd[0], 0, 12);
 843         psrb->cmd[0] = SCSI_REQ_SENSE;
 844         psrb->cmd[1] = srb->lun << 5;
 845         psrb->cmd[4] = 18;
 846         psrb->datalen = 18;
 847         psrb->pdata = &srb->sense_buf[0];
 848         psrb->cmdlen = 12;
 849         /* issue the command */
 850         result = usb_stor_CB_comdat(psrb, us);
 851         debug("auto request returned %d\n", result);
 852         /* if this is an CBI Protocol, get IRQ */
 853         if (us->protocol == US_PR_CBI)
 854                 status = usb_stor_CBI_get_status(psrb, us);
 855
 856         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 857                 debug(" AUTO REQUEST ERROR %ld\n",
 858                       us->pusb_dev->status);
 859                 return USB_STOR_TRANSPORT_ERROR;
 860         }
 861         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 862               srb->sense_buf[0], srb->sense_buf[2],
 863               srb->sense_buf[12], srb->sense_buf[13]);
 864         /* Check the auto request result */
 865         if ((srb->sense_buf[2] == 0) &&
 866             (srb->sense_buf[12] == 0) &&
 867             (srb->sense_buf[13] == 0)) {
 868                 /* ok, no sense */
 869                 return USB_STOR_TRANSPORT_GOOD;
 870         }
 871
 872         /* Check the auto request result */
 873         switch (srb->sense_buf[2]) {
 874         case 0x01:
 875                 /* Recovered Error */
 876                 return USB_STOR_TRANSPORT_GOOD;
 877                 break;
 878         case 0x02:
 879                 /* Not Ready */
 880                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 881                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 882                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 883                                 srb->sense_buf[0], srb->sense_buf[2],
 884                                 srb->sense_buf[12], srb->sense_buf[13]);
 885                         return USB_STOR_TRANSPORT_FAILED;
 886                 } else {
 887                         mdelay(100);
 888                         goto do_retry;
 889                 }
 890                 break;
 891         default:
 892                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 893                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 894                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 895                                 srb->sense_buf[2], srb->sense_buf[12],
 896                                 srb->sense_buf[13]);
 897                         return USB_STOR_TRANSPORT_FAILED;
 898                 } else
 899                         goto do_retry;
 900                 break;
 901         }
 902         return USB_STOR_TRANSPORT_FAILED;
 903 }
 904
 905
 906 static int usb_inquiry(ccb *srb, struct us_data *ss)
 907 {
 908         int retry, i;
 909         retry = 5;
 910         do {
 911                 memset(&srb->cmd[0], 0, 12);
 912                 srb->cmd[0] = SCSI_INQUIRY;
 913                 srb->cmd[1] = srb->lun << 5;
 914                 srb->cmd[4] = 36;
 915                 srb->datalen = 36;
 916                 srb->cmdlen = 12;
 917                 i = ss->transport(srb, ss);
 918                 debug("inquiry returns %d\n", i);
 919                 if (i == 0)
 920                         break;
 921         } while (--retry);
 922
 923         if (!retry) {
 924                 printf("error in inquiry\n");
 925                 return -1;
 926         }
 927         return 0;
 928 }
 929
 930 static int usb_request_sense(ccb *srb, struct us_data *ss)
 931 {
 932         char *ptr;
 933
 934         ptr = (char *)srb->pdata;
 935         memset(&srb->cmd[0], 0, 12);
 936         srb->cmd[0] = SCSI_REQ_SENSE;
 937         srb->cmd[1] = srb->lun << 5;
 938         srb->cmd[4] = 18;
 939         srb->datalen = 18;
 940         srb->pdata = &srb->sense_buf[0];
 941         srb->cmdlen = 12;
 942         ss->transport(srb, ss);
 943         debug("Request Sense returned %02X %02X %02X\n",
 944               srb->sense_buf[2], srb->sense_buf[12],
 945               srb->sense_buf[13]);
 946         srb->pdata = (uchar *)ptr;
 947         return 0;
 948 }
 949
 950 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
 951 {
 952         int retries = 10;
 953
 954         do {
 955                 memset(&srb->cmd[0], 0, 12);
 956                 srb->cmd[0] = SCSI_TST_U_RDY;
 957                 srb->cmd[1] = srb->lun << 5;
 958                 srb->datalen = 0;
 959                 srb->cmdlen = 12;
 960                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
 961                         ss->flags |= USB_READY;
 962                         return 0;
 963                 }
 964                 usb_request_sense(srb, ss);
 965                 /*
 966                  * Check the Key Code Qualifier, if it matches
 967                  * "Not Ready - medium not present"
 968                  * (the sense Key equals 0x2 and the ASC is 0x3a)
 969                  * return immediately as the medium being absent won't change
 970                  * unless there is a user action.
 971                  */
 972                 if ((srb->sense_buf[2] == 0x02) &&
 973                     (srb->sense_buf[12] == 0x3a))
 974                         return -1;
 975                 mdelay(100);
 976         } while (retries--);
 977
 978         return -1;
 979 }
 980
 981 static int usb_read_capacity(ccb *srb, struct us_data *ss)
 982 {
 983         int retry;
 984         /* XXX retries */
 985         retry = 3;
 986         do {
 987                 memset(&srb->cmd[0], 0, 12);
 988                 srb->cmd[0] = SCSI_RD_CAPAC;
 989                 srb->cmd[1] = srb->lun << 5;
 990                 srb->datalen = 8;
 991                 srb->cmdlen = 12;
 992                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 993                         return 0;
 994         } while (retry--);
 995
 996         return -1;
 997 }
 998
 999 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
1000                        unsigned short blocks)
1001 {
1002         memset(&srb->cmd[0], 0, 12);
1003         srb->cmd[0] = SCSI_READ10;
1004         srb->cmd[1] = srb->lun << 5;
1005         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1006         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1007         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1008         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1009         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1010         srb->cmd[8] = (unsigned char) blocks & 0xff;
1011         srb->cmdlen = 12;
1012         debug("read10: start %lx blocks %x\n", start, blocks);
1013         return ss->transport(srb, ss);
1014 }
1015
1016 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
1017                         unsigned short blocks)
1018 {
1019         memset(&srb->cmd[0], 0, 12);
1020         srb->cmd[0] = SCSI_WRITE10;
1021         srb->cmd[1] = srb->lun << 5;
1022         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1023         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1024         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1025         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1026         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1027         srb->cmd[8] = (unsigned char) blocks & 0xff;
1028         srb->cmdlen = 12;
1029         debug("write10: start %lx blocks %x\n", start, blocks);
1030         return ss->transport(srb, ss);
1031 }
1032
1033
1034 #ifdef CONFIG_USB_BIN_FIXUP
1035 /*
1036  * Some USB storage devices queried for SCSI identification data respond with
1037  * binary strings, which if output to the console freeze the terminal. The
1038  * workaround is to modify the vendor and product strings read from such
1039  * device with proper values (as reported by 'usb info').
1040  *
1041  * Vendor and product length limits are taken from the definition of
1042  * block_dev_desc_t in include/part.h.
1043  */
1044 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1045                                 unsigned char vendor[],
1046                                 unsigned char product[]) {
1047         const unsigned char max_vendor_len = 40;
1048         const unsigned char max_product_len = 20;
1049         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1050                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1051                 strncpy((char *)product, "Flash Media Cntrller",
1052                         max_product_len);
1053         }
1054 }
1055 #endif /* CONFIG_USB_BIN_FIXUP */
1056
1057 unsigned long usb_stor_read(int device, unsigned long blknr,
1058                             lbaint_t blkcnt, void *buffer)
1059 {
1060         lbaint_t start, blks;
1061         uintptr_t buf_addr;
1062         unsigned short smallblks;
1063         struct usb_device *dev;
1064         struct us_data *ss;
1065         int retry, i;
1066         ccb *srb = &usb_ccb;
1067
1068         if (blkcnt == 0)
1069                 return 0;
1070
1071         device &= 0xff;
1072         /* Setup  device */
1073         debug("\nusb_read: dev %d \n", device);
1074         dev = NULL;
1075         for (i = 0; i < USB_MAX_DEVICE; i++) {
1076                 dev = usb_get_dev_index(i);
1077                 if (dev == NULL)
1078                         return 0;
1079                 if (dev->devnum == usb_dev_desc[device].target)
1080                         break;
1081         }
1082         ss = (struct us_data *)dev->privptr;
1083
1084         usb_disable_asynch(1); /* asynch transfer not allowed */
1085         srb->lun = usb_dev_desc[device].lun;
1086         buf_addr = (unsigned long)buffer;
1087         start = blknr;
1088         blks = blkcnt;
1089
1090         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
1091               " buffer %lx\n", device, start, blks, buf_addr);
1092
1093         do {
1094                 /* XXX need some comment here */
1095                 retry = 2;
1096                 srb->pdata = (unsigned char *)buf_addr;
1097                 if (blks > USB_MAX_XFER_BLK)
1098                         smallblks = USB_MAX_XFER_BLK;
1099                 else
1100                         smallblks = (unsigned short) blks;
1101 retry_it:
1102                 if (smallblks == USB_MAX_XFER_BLK)
1103                         usb_show_progress();
1104                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1105                 srb->pdata = (unsigned char *)buf_addr;
1106                 if (usb_read_10(srb, ss, start, smallblks)) {
1107                         debug("Read ERROR\n");
1108                         usb_request_sense(srb, ss);
1109                         if (retry--)
1110                                 goto retry_it;
1111                         blkcnt -= blks;
1112                         break;
1113                 }
1114                 start += smallblks;
1115                 blks -= smallblks;
1116                 buf_addr += srb->datalen;
1117         } while (blks != 0);
1118         ss->flags &= ~USB_READY;
1119
1120         debug("usb_read: end startblk " LBAF
1121               ", blccnt %x buffer %lx\n",
1122               start, smallblks, buf_addr);
1123
1124         usb_disable_asynch(0); /* asynch transfer allowed */
1125         if (blkcnt >= USB_MAX_XFER_BLK)
1126                 debug("\n");
1127         return blkcnt;
1128 }
1129
1130 unsigned long usb_stor_write(int device, unsigned long blknr,
1131                                 lbaint_t blkcnt, const void *buffer)
1132 {
1133         lbaint_t start, blks;
1134         uintptr_t buf_addr;
1135         unsigned short smallblks;
1136         struct usb_device *dev;
1137         struct us_data *ss;
1138         int retry, i;
1139         ccb *srb = &usb_ccb;
1140
1141         if (blkcnt == 0)
1142                 return 0;
1143
1144         device &= 0xff;
1145         /* Setup  device */
1146         debug("\nusb_write: dev %d \n", device);
1147         dev = NULL;
1148         for (i = 0; i < USB_MAX_DEVICE; i++) {
1149                 dev = usb_get_dev_index(i);
1150                 if (dev == NULL)
1151                         return 0;
1152                 if (dev->devnum == usb_dev_desc[device].target)
1153                         break;
1154         }
1155         ss = (struct us_data *)dev->privptr;
1156
1157         usb_disable_asynch(1); /* asynch transfer not allowed */
1158
1159         srb->lun = usb_dev_desc[device].lun;
1160         buf_addr = (unsigned long)buffer;
1161         start = blknr;
1162         blks = blkcnt;
1163
1164         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
1165               " buffer %lx\n", device, start, blks, buf_addr);
1166
1167         do {
1168                 /* If write fails retry for max retry count else
1169                  * return with number of blocks written successfully.
1170                  */
1171                 retry = 2;
1172                 srb->pdata = (unsigned char *)buf_addr;
1173                 if (blks > USB_MAX_XFER_BLK)
1174                         smallblks = USB_MAX_XFER_BLK;
1175                 else
1176                         smallblks = (unsigned short) blks;
1177 retry_it:
1178                 if (smallblks == USB_MAX_XFER_BLK)
1179                         usb_show_progress();
1180                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1181                 srb->pdata = (unsigned char *)buf_addr;
1182                 if (usb_write_10(srb, ss, start, smallblks)) {
1183                         debug("Write ERROR\n");
1184                         usb_request_sense(srb, ss);
1185                         if (retry--)
1186                                 goto retry_it;
1187                         blkcnt -= blks;
1188                         break;
1189                 }
1190                 start += smallblks;
1191                 blks -= smallblks;
1192                 buf_addr += srb->datalen;
1193         } while (blks != 0);
1194         ss->flags &= ~USB_READY;
1195
1196         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %lx\n",
1197               start, smallblks, buf_addr);
1198
1199         usb_disable_asynch(0); /* asynch transfer allowed */
1200         if (blkcnt >= USB_MAX_XFER_BLK)
1201                 debug("\n");
1202         return blkcnt;
1203
1204 }
1205
1206 /* Probe to see if a new device is actually a Storage device */
1207 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1208                       struct us_data *ss)
1209 {
1210         struct usb_interface *iface;
1211         int i;
1212         struct usb_endpoint_descriptor *ep_desc;
1213         unsigned int flags = 0;
1214
1215         int protocol = 0;
1216         int subclass = 0;
1217
1218         /* let's examine the device now */
1219         iface = &dev->config.if_desc[ifnum];
1220
1221 #if 0
1222         /* this is the place to patch some storage devices */
1223         debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1224                         dev->descriptor.idProduct);
1225
1226         if ((dev->descriptor.idVendor) == 0x066b &&
1227             (dev->descriptor.idProduct) == 0x0103) {
1228                 debug("patched for E-USB\n");
1229                 protocol = US_PR_CB;
1230                 subclass = US_SC_UFI;       /* an assumption */
1231         }
1232 #endif
1233
1234         if (dev->descriptor.bDeviceClass != 0 ||
1235                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1236                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1237                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1238                 /* if it's not a mass storage, we go no further */
1239                 return 0;
1240         }
1241
1242         memset(ss, 0, sizeof(struct us_data));
1243
1244         /* At this point, we know we've got a live one */
1245         debug("\n\nUSB Mass Storage device detected\n");
1246
1247         /* Initialize the us_data structure with some useful info */
1248         ss->flags = flags;
1249         ss->ifnum = ifnum;
1250         ss->pusb_dev = dev;
1251         ss->attention_done = 0;
1252
1253         /* If the device has subclass and protocol, then use that.  Otherwise,
1254          * take data from the specific interface.
1255          */
1256         if (subclass) {
1257                 ss->subclass = subclass;
1258                 ss->protocol = protocol;
1259         } else {
1260                 ss->subclass = iface->desc.bInterfaceSubClass;
1261                 ss->protocol = iface->desc.bInterfaceProtocol;
1262         }
1263
1264         /* set the handler pointers based on the protocol */
1265         debug("Transport: ");
1266         switch (ss->protocol) {
1267         case US_PR_CB:
1268                 debug("Control/Bulk\n");
1269                 ss->transport = usb_stor_CB_transport;
1270                 ss->transport_reset = usb_stor_CB_reset;
1271                 break;
1272
1273         case US_PR_CBI:
1274                 debug("Control/Bulk/Interrupt\n");
1275                 ss->transport = usb_stor_CB_transport;
1276                 ss->transport_reset = usb_stor_CB_reset;
1277                 break;
1278         case US_PR_BULK:
1279                 debug("Bulk/Bulk/Bulk\n");
1280                 ss->transport = usb_stor_BBB_transport;
1281                 ss->transport_reset = usb_stor_BBB_reset;
1282                 break;
1283         default:
1284                 printf("USB Storage Transport unknown / not yet implemented\n");
1285                 return 0;
1286                 break;
1287         }
1288
1289         /*
1290          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1291          * An optional interrupt is OK (necessary for CBI protocol).
1292          * We will ignore any others.
1293          */
1294         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1295                 ep_desc = &iface->ep_desc[i];
1296                 /* is it an BULK endpoint? */
1297                 if ((ep_desc->bmAttributes &
1298                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1299                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1300                                 ss->ep_in = ep_desc->bEndpointAddress &
1301                                                 USB_ENDPOINT_NUMBER_MASK;
1302                         else
1303                                 ss->ep_out =
1304                                         ep_desc->bEndpointAddress &
1305                                         USB_ENDPOINT_NUMBER_MASK;
1306                 }
1307
1308                 /* is it an interrupt endpoint? */
1309                 if ((ep_desc->bmAttributes &
1310                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1311                         ss->ep_int = ep_desc->bEndpointAddress &
1312                                                 USB_ENDPOINT_NUMBER_MASK;
1313                         ss->irqinterval = ep_desc->bInterval;
1314                 }
1315         }
1316         debug("Endpoints In %d Out %d Int %d\n",
1317               ss->ep_in, ss->ep_out, ss->ep_int);
1318
1319         /* Do some basic sanity checks, and bail if we find a problem */
1320         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1321             !ss->ep_in || !ss->ep_out ||
1322             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1323                 debug("Problems with device\n");
1324                 return 0;
1325         }
1326         /* set class specific stuff */
1327         /* We only handle certain protocols.  Currently, these are
1328          * the only ones.
1329          * The SFF8070 accepts the requests used in u-boot
1330          */
1331         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1332             ss->subclass != US_SC_8070) {
1333                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1334                 return 0;
1335         }
1336         if (ss->ep_int) {
1337                 /* we had found an interrupt endpoint, prepare irq pipe
1338                  * set up the IRQ pipe and handler
1339                  */
1340                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1341                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1342                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1343                 dev->irq_handle = usb_stor_irq;
1344         }
1345         dev->privptr = (void *)ss;
1346         return 1;
1347 }
1348
1349 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1350                       block_dev_desc_t *dev_desc)
1351 {
1352         unsigned char perq, modi;
1353         ALLOC_CACHE_ALIGN_BUFFER(unsigned long, cap, 2);
1354         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, usb_stor_buf, 36);
1355         unsigned long *capacity, *blksz;
1356         ccb *pccb = &usb_ccb;
1357
1358         pccb->pdata = usb_stor_buf;
1359
1360         dev_desc->target = dev->devnum;
1361         pccb->lun = dev_desc->lun;
1362         debug(" address %d\n", dev_desc->target);
1363
1364         if (usb_inquiry(pccb, ss))
1365                 return -1;
1366
1367         perq = usb_stor_buf[0];
1368         modi = usb_stor_buf[1];
1369
1370         if ((perq & 0x1f) == 0x1f) {
1371                 /* skip unknown devices */
1372                 return 0;
1373         }
1374         if ((modi&0x80) == 0x80) {
1375                 /* drive is removable */
1376                 dev_desc->removable = 1;
1377         }
1378         memcpy(&dev_desc->vendor[0], (const void *) &usb_stor_buf[8], 8);
1379         memcpy(&dev_desc->product[0], (const void *) &usb_stor_buf[16], 16);
1380         memcpy(&dev_desc->revision[0], (const void *) &usb_stor_buf[32], 4);
1381         dev_desc->vendor[8] = 0;
1382         dev_desc->product[16] = 0;
1383         dev_desc->revision[4] = 0;
1384 #ifdef CONFIG_USB_BIN_FIXUP
1385         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1386                       (uchar *)dev_desc->product);
1387 #endif /* CONFIG_USB_BIN_FIXUP */
1388         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1389               usb_stor_buf[3]);
1390         if (usb_test_unit_ready(pccb, ss)) {
1391                 printf("Device NOT ready\n"
1392                        "   Request Sense returned %02X %02X %02X\n",
1393                        pccb->sense_buf[2], pccb->sense_buf[12],
1394                        pccb->sense_buf[13]);
1395                 if (dev_desc->removable == 1) {
1396                         dev_desc->type = perq;
1397                         return 1;
1398                 }
1399                 return 0;
1400         }
1401         pccb->pdata = (unsigned char *)&cap[0];
1402         memset(pccb->pdata, 0, 8);
1403         if (usb_read_capacity(pccb, ss) != 0) {
1404                 printf("READ_CAP ERROR\n");
1405                 cap[0] = 2880;
1406                 cap[1] = 0x200;
1407         }
1408         ss->flags &= ~USB_READY;
1409         debug("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0], cap[1]);
1410 #if 0
1411         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1412                 cap[0] >>= 16;
1413 #endif
1414         cap[0] = cpu_to_be32(cap[0]);
1415         cap[1] = cpu_to_be32(cap[1]);
1416
1417         /* this assumes bigendian! */
1418         cap[0] += 1;
1419         capacity = &cap[0];
1420         blksz = &cap[1];
1421         debug("Capacity = 0x%lx, blocksz = 0x%lx\n", *capacity, *blksz);
1422         dev_desc->lba = *capacity;
1423         dev_desc->blksz = *blksz;
1424         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1425         dev_desc->type = perq;
1426         debug(" address %d\n", dev_desc->target);
1427         debug("partype: %d\n", dev_desc->part_type);
1428
1429         init_part(dev_desc);
1430
1431         debug("partype: %d\n", dev_desc->part_type);
1432         return 1;
1433 }