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