common/usb_storage.c

   1 /*
   2  * Most of this source has been derived from the Linux USB
   3  * project:
   4  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   5  *   (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
   6  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
   7  *   (c) 2000 Yggdrasil Computing, Inc.
   8  *
   9  *
  10  * Adapted for U-Boot:
  11  *   (C) Copyright 2001 Denis Peter, MPL AG Switzerland
  12  *
  13  * For BBB support (C) Copyright 2003
  14  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
  15  *
  16  * BBB support based on /sys/dev/usb/umass.c from
  17  * FreeBSD.
  18  *
  19  * SPDX-License-Identifier:     GPL-2.0+
  20  */
  21
  22 /* Note:
  23  * Currently only the CBI transport protocoll has been implemented, and it
  24  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
  25  * transport protocoll may work as well.
  26  */
  27 /*
  28  * New Note:
  29  * Support for USB Mass Storage Devices (BBB) has been added. It has
  30  * only been tested with USB memory sticks.
  31  */
  32
  33
  34 #include <common.h>
  35 #include <command.h>
  36 #include <inttypes.h>
  37 #include <asm/byteorder.h>
  38 #include <asm/processor.h>
  39
  40 #include <part.h>
  41 #include <usb.h>
  42
  43 #undef BBB_COMDAT_TRACE
  44 #undef BBB_XPORT_TRACE
  45
  46 #include <scsi.h>
  47 /* direction table -- this indicates the direction of the data
  48  * transfer for each command code -- a 1 indicates input
  49  */
  50 static const unsigned char us_direction[256/8] = {
  51         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  52         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  53         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  54         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  55 };
  56 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  57
  58 static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
  59
  60 /*
  61  * CBI style
  62  */
  63
  64 #define US_CBI_ADSC             0
  65
  66 /*
  67  * BULK only
  68  */
  69 #define US_BBB_RESET            0xff
  70 #define US_BBB_GET_MAX_LUN      0xfe
  71
  72 /* Command Block Wrapper */
  73 typedef struct {
  74         __u32           dCBWSignature;
  75 #       define CBWSIGNATURE     0x43425355
  76         __u32           dCBWTag;
  77         __u32           dCBWDataTransferLength;
  78         __u8            bCBWFlags;
  79 #       define CBWFLAGS_OUT     0x00
  80 #       define CBWFLAGS_IN      0x80
  81         __u8            bCBWLUN;
  82         __u8            bCDBLength;
  83 #       define CBWCDBLENGTH     16
  84         __u8            CBWCDB[CBWCDBLENGTH];
  85 } umass_bbb_cbw_t;
  86 #define UMASS_BBB_CBW_SIZE      31
  87 static __u32 CBWTag;
  88
  89 /* Command Status Wrapper */
  90 typedef struct {
  91         __u32           dCSWSignature;
  92 #       define CSWSIGNATURE     0x53425355
  93         __u32           dCSWTag;
  94         __u32           dCSWDataResidue;
  95         __u8            bCSWStatus;
  96 #       define CSWSTATUS_GOOD   0x0
  97 #       define CSWSTATUS_FAILED 0x1
  98 #       define CSWSTATUS_PHASE  0x2
  99 } umass_bbb_csw_t;
 100 #define UMASS_BBB_CSW_SIZE      13
 101
 102 #define USB_MAX_STOR_DEV 5
 103 static int usb_max_devs; /* number of highest available usb device */
 104
 105 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
 106
 107 struct us_data;
 108 typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
 109 typedef int (*trans_reset)(struct us_data *data);
 110
 111 struct us_data {
 112         struct usb_device *pusb_dev;     /* this usb_device */
 113
 114         unsigned int    flags;                  /* from filter initially */
 115 #       define USB_READY        (1 << 0)
 116         unsigned char   ifnum;                  /* interface number */
 117         unsigned char   ep_in;                  /* in endpoint */
 118         unsigned char   ep_out;                 /* out ....... */
 119         unsigned char   ep_int;                 /* interrupt . */
 120         unsigned char   subclass;               /* as in overview */
 121         unsigned char   protocol;               /* .............. */
 122         unsigned char   attention_done;         /* force attn on first cmd */
 123         unsigned short  ip_data;                /* interrupt data */
 124         int             action;                 /* what to do */
 125         int             ip_wanted;              /* needed */
 126         int             *irq_handle;            /* for USB int requests */
 127         unsigned int    irqpipe;                /* pipe for release_irq */
 128         unsigned char   irqmaxp;                /* max packed for irq Pipe */
 129         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
 130         ccb             *srb;                   /* current srb */
 131         trans_reset     transport_reset;        /* reset routine */
 132         trans_cmnd      transport;              /* transport routine */
 133 };
 134
 135 #ifdef CONFIG_USB_EHCI
 136 /*
 137  * The U-Boot EHCI driver can handle any transfer length as long as there is
 138  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
 139  * limited to 65535 blocks.
 140  */
 141 #define USB_MAX_XFER_BLK        65535
 142 #else
 143 #define USB_MAX_XFER_BLK        20
 144 #endif
 145
 146 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 147
 148
 149 #define USB_STOR_TRANSPORT_GOOD    0
 150 #define USB_STOR_TRANSPORT_FAILED -1
 151 #define USB_STOR_TRANSPORT_ERROR  -2
 152
 153 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
 154                       block_dev_desc_t *dev_desc);
 155 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 156                       struct us_data *ss);
 157 unsigned long usb_stor_read(int device, lbaint_t blknr,
 158                             lbaint_t blkcnt, void *buffer);
 159 unsigned long usb_stor_write(int device, lbaint_t blknr,
 160                              lbaint_t blkcnt, const void *buffer);
 161 struct usb_device * usb_get_dev_index(int index);
 162 void uhci_show_temp_int_td(void);
 163
 164 #ifdef CONFIG_PARTITIONS
 165 block_dev_desc_t *usb_stor_get_dev(int index)
 166 {
 167         return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
 168 }
 169 #endif
 170
 171 static void usb_show_progress(void)
 172 {
 173         debug(".");
 174 }
 175
 176 /*******************************************************************************
 177  * show info on storage devices; 'usb start/init' must be invoked earlier
 178  * as we only retrieve structures populated during devices initialization
 179  */
 180 int usb_stor_info(void)
 181 {
 182         int i;
 183
 184         if (usb_max_devs > 0) {
 185                 for (i = 0; i < usb_max_devs; i++) {
 186                         printf("  Device %d: ", i);
 187                         dev_print(&usb_dev_desc[i]);
 188                 }
 189                 return 0;
 190         }
 191
 192         printf("No storage devices, perhaps not 'usb start'ed..?\n");
 193         return 1;
 194 }
 195
 196 static unsigned int usb_get_max_lun(struct us_data *us)
 197 {
 198         int len;
 199         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
 200         len = usb_control_msg(us->pusb_dev,
 201                               usb_rcvctrlpipe(us->pusb_dev, 0),
 202                               US_BBB_GET_MAX_LUN,
 203                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 204                               0, us->ifnum,
 205                               result, sizeof(char),
 206                               USB_CNTL_TIMEOUT * 5);
 207         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
 208         return (len > 0) ? *result : 0;
 209 }
 210
 211 /*******************************************************************************
 212  * scan the usb and reports device info
 213  * to the user if mode = 1
 214  * returns current device or -1 if no
 215  */
 216 int usb_stor_scan(int mode)
 217 {
 218         unsigned char i;
 219         struct usb_device *dev;
 220
 221         if (mode == 1)
 222                 printf("       scanning usb for storage devices... ");
 223
 224         usb_disable_asynch(1); /* asynch transfer not allowed */
 225
 226         for (i = 0; i < USB_MAX_STOR_DEV; i++) {
 227                 memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
 228                 usb_dev_desc[i].if_type = IF_TYPE_USB;
 229                 usb_dev_desc[i].dev = i;
 230                 usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
 231                 usb_dev_desc[i].target = 0xff;
 232                 usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
 233                 usb_dev_desc[i].block_read = usb_stor_read;
 234                 usb_dev_desc[i].block_write = usb_stor_write;
 235         }
 236
 237         usb_max_devs = 0;
 238         for (i = 0; i < USB_MAX_DEVICE; i++) {
 239                 dev = usb_get_dev_index(i); /* get device */
 240                 debug("i=%d\n", i);
 241                 if (dev == NULL)
 242                         break; /* no more devices available */
 243
 244                 if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
 245                         /* OK, it's a storage device.  Iterate over its LUNs
 246                          * and populate `usb_dev_desc'.
 247                          */
 248                         int lun, max_lun, start = usb_max_devs;
 249
 250                         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 251                         for (lun = 0;
 252                              lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
 253                              lun++) {
 254                                 usb_dev_desc[usb_max_devs].lun = lun;
 255                                 if (usb_stor_get_info(dev, &usb_stor[start],
 256                                     &usb_dev_desc[usb_max_devs]) == 1) {
 257                                         usb_max_devs++;
 258                                 }
 259                         }
 260                 }
 261                 /* if storage device */
 262                 if (usb_max_devs == USB_MAX_STOR_DEV) {
 263                         printf("max USB Storage Device reached: %d stopping\n",
 264                                 usb_max_devs);
 265                         break;
 266                 }
 267         } /* for */
 268
 269         usb_disable_asynch(0); /* asynch transfer allowed */
 270         printf("%d Storage Device(s) found\n", usb_max_devs);
 271         if (usb_max_devs > 0)
 272                 return 0;
 273         return -1;
 274 }
 275
 276 static int usb_stor_irq(struct usb_device *dev)
 277 {
 278         struct us_data *us;
 279         us = (struct us_data *)dev->privptr;
 280
 281         if (us->ip_wanted)
 282                 us->ip_wanted = 0;
 283         return 0;
 284 }
 285
 286
 287 #ifdef  DEBUG
 288
 289 static void usb_show_srb(ccb *pccb)
 290 {
 291         int i;
 292         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
 293         for (i = 0; i < 12; i++)
 294                 printf("%02X ", pccb->cmd[i]);
 295         printf("\n");
 296 }
 297
 298 static void display_int_status(unsigned long tmp)
 299 {
 300         printf("Status: %s %s %s %s %s %s %s\n",
 301                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 302                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 303                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 304                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 305                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 306                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 307                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 308 }
 309 #endif
 310 /***********************************************************************
 311  * Data transfer routines
 312  ***********************************************************************/
 313
 314 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 315 {
 316         int max_size;
 317         int this_xfer;
 318         int result;
 319         int partial;
 320         int maxtry;
 321         int stat;
 322
 323         /* determine the maximum packet size for these transfers */
 324         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 325
 326         /* while we have data left to transfer */
 327         while (length) {
 328
 329                 /* calculate how long this will be -- maximum or a remainder */
 330                 this_xfer = length > max_size ? max_size : length;
 331                 length -= this_xfer;
 332
 333                 /* setup the retry counter */
 334                 maxtry = 10;
 335
 336                 /* set up the transfer loop */
 337                 do {
 338                         /* transfer the data */
 339                         debug("Bulk xfer 0x%x(%d) try #%d\n",
 340                               (unsigned int)buf, this_xfer, 11 - maxtry);
 341                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 342                                               this_xfer, &partial,
 343                                               USB_CNTL_TIMEOUT * 5);
 344                         debug("bulk_msg returned %d xferred %d/%d\n",
 345                               result, partial, this_xfer);
 346                         if (us->pusb_dev->status != 0) {
 347                                 /* if we stall, we need to clear it before
 348                                  * we go on
 349                                  */
 350 #ifdef DEBUG
 351                                 display_int_status(us->pusb_dev->status);
 352 #endif
 353                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 354                                         debug("stalled ->clearing endpoint" \
 355                                               "halt for pipe 0x%x\n", pipe);
 356                                         stat = us->pusb_dev->status;
 357                                         usb_clear_halt(us->pusb_dev, pipe);
 358                                         us->pusb_dev->status = stat;
 359                                         if (this_xfer == partial) {
 360                                                 debug("bulk transferred" \
 361                                                       "with error %lX," \
 362                                                       " but data ok\n",
 363                                                       us->pusb_dev->status);
 364                                                 return 0;
 365                                         }
 366                                         else
 367                                                 return result;
 368                                 }
 369                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 370                                         debug("Device NAKed bulk_msg\n");
 371                                         return result;
 372                                 }
 373                                 debug("bulk transferred with error");
 374                                 if (this_xfer == partial) {
 375                                         debug(" %ld, but data ok\n",
 376                                               us->pusb_dev->status);
 377                                         return 0;
 378                                 }
 379                                 /* if our try counter reaches 0, bail out */
 380                                         debug(" %ld, data %d\n",
 381                                               us->pusb_dev->status, partial);
 382                                 if (!maxtry--)
 383                                                 return result;
 384                         }
 385                         /* update to show what data was transferred */
 386                         this_xfer -= partial;
 387                         buf += partial;
 388                         /* continue until this transfer is done */
 389                 } while (this_xfer);
 390         }
 391
 392         /* if we get here, we're done and successful */
 393         return 0;
 394 }
 395
 396 static int usb_stor_BBB_reset(struct us_data *us)
 397 {
 398         int result;
 399         unsigned int pipe;
 400
 401         /*
 402          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
 403          *
 404          * For Reset Recovery the host shall issue in the following order:
 405          * a) a Bulk-Only Mass Storage Reset
 406          * b) a Clear Feature HALT to the Bulk-In endpoint
 407          * c) a Clear Feature HALT to the Bulk-Out endpoint
 408          *
 409          * This is done in 3 steps.
 410          *
 411          * If the reset doesn't succeed, the device should be port reset.
 412          *
 413          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
 414          */
 415         debug("BBB_reset\n");
 416         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 417                                  US_BBB_RESET,
 418                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 419                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
 420
 421         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 422                 debug("RESET:stall\n");
 423                 return -1;
 424         }
 425
 426         /* long wait for reset */
 427         mdelay(150);
 428         debug("BBB_reset result %d: status %lX reset\n",
 429               result, us->pusb_dev->status);
 430         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 431         result = usb_clear_halt(us->pusb_dev, pipe);
 432         /* long wait for reset */
 433         mdelay(150);
 434         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
 435               result, us->pusb_dev->status);
 436         /* long wait for reset */
 437         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 438         result = usb_clear_halt(us->pusb_dev, pipe);
 439         mdelay(150);
 440         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
 441               result, us->pusb_dev->status);
 442         debug("BBB_reset done\n");
 443         return 0;
 444 }
 445
 446 /* FIXME: this reset function doesn't really reset the port, and it
 447  * should. Actually it should probably do what it's doing here, and
 448  * reset the port physically
 449  */
 450 static int usb_stor_CB_reset(struct us_data *us)
 451 {
 452         unsigned char cmd[12];
 453         int result;
 454
 455         debug("CB_reset\n");
 456         memset(cmd, 0xff, sizeof(cmd));
 457         cmd[0] = SCSI_SEND_DIAG;
 458         cmd[1] = 4;
 459         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 460                                  US_CBI_ADSC,
 461                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 462                                  0, us->ifnum, cmd, sizeof(cmd),
 463                                  USB_CNTL_TIMEOUT * 5);
 464
 465         /* long wait for reset */
 466         mdelay(1500);
 467         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
 468               result, us->pusb_dev->status);
 469         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 470         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 471
 472         debug("CB_reset done\n");
 473         return 0;
 474 }
 475
 476 /*
 477  * Set up the command for a BBB device. Note that the actual SCSI
 478  * command is copied into cbw.CBWCDB.
 479  */
 480 static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
 481 {
 482         int result;
 483         int actlen;
 484         int dir_in;
 485         unsigned int pipe;
 486         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw, 1);
 487
 488         dir_in = US_DIRECTION(srb->cmd[0]);
 489
 490 #ifdef BBB_COMDAT_TRACE
 491         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
 492                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 493                 srb->pdata);
 494         if (srb->cmdlen) {
 495                 for (result = 0; result < srb->cmdlen; result++)
 496                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 497                 printf("\n");
 498         }
 499 #endif
 500         /* sanity checks */
 501         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 502                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
 503                 return -1;
 504         }
 505
 506         /* always OUT to the ep */
 507         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 508
 509         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 510         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 511         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 512         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 513         cbw->bCBWLUN = srb->lun;
 514         cbw->bCDBLength = srb->cmdlen;
 515         /* copy the command data into the CBW command data buffer */
 516         /* DST SRC LEN!!! */
 517         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 518         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 519                               &actlen, USB_CNTL_TIMEOUT * 5);
 520         if (result < 0)
 521                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 522         return result;
 523 }
 524
 525 /* FIXME: we also need a CBI_command which sets up the completion
 526  * interrupt, and waits for it
 527  */
 528 static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 529 {
 530         int result = 0;
 531         int dir_in, retry;
 532         unsigned int pipe;
 533         unsigned long status;
 534
 535         retry = 5;
 536         dir_in = US_DIRECTION(srb->cmd[0]);
 537
 538         if (dir_in)
 539                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 540         else
 541                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 542
 543         while (retry--) {
 544                 debug("CBI gets a command: Try %d\n", 5 - retry);
 545 #ifdef DEBUG
 546                 usb_show_srb(srb);
 547 #endif
 548                 /* let's send the command via the control pipe */
 549                 result = usb_control_msg(us->pusb_dev,
 550                                          usb_sndctrlpipe(us->pusb_dev , 0),
 551                                          US_CBI_ADSC,
 552                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 553                                          0, us->ifnum,
 554                                          srb->cmd, srb->cmdlen,
 555                                          USB_CNTL_TIMEOUT * 5);
 556                 debug("CB_transport: control msg returned %d, status %lX\n",
 557                       result, us->pusb_dev->status);
 558                 /* check the return code for the command */
 559                 if (result < 0) {
 560                         if (us->pusb_dev->status & USB_ST_STALLED) {
 561                                 status = us->pusb_dev->status;
 562                                 debug(" stall during command found," \
 563                                       " clear pipe\n");
 564                                 usb_clear_halt(us->pusb_dev,
 565                                               usb_sndctrlpipe(us->pusb_dev, 0));
 566                                 us->pusb_dev->status = status;
 567                         }
 568                         debug(" error during command %02X" \
 569                               " Stat = %lX\n", srb->cmd[0],
 570                               us->pusb_dev->status);
 571                         return result;
 572                 }
 573                 /* transfer the data payload for this command, if one exists*/
 574
 575                 debug("CB_transport: control msg returned %d," \
 576                       " direction is %s to go 0x%lx\n", result,
 577                       dir_in ? "IN" : "OUT", srb->datalen);
 578                 if (srb->datalen) {
 579                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 580                                                  srb->datalen);
 581                         debug("CBI attempted to transfer data," \
 582                               " result is %d status %lX, len %d\n",
 583                               result, us->pusb_dev->status,
 584                                 us->pusb_dev->act_len);
 585                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 586                                 break;
 587                 } /* if (srb->datalen) */
 588                 else
 589                         break;
 590         }
 591         /* return result */
 592
 593         return result;
 594 }
 595
 596
 597 static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 598 {
 599         int timeout;
 600
 601         us->ip_wanted = 1;
 602         submit_int_msg(us->pusb_dev, us->irqpipe,
 603                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 604         timeout = 1000;
 605         while (timeout--) {
 606                 if ((volatile int *) us->ip_wanted == NULL)
 607                         break;
 608                 mdelay(10);
 609         }
 610         if (us->ip_wanted) {
 611                 printf("        Did not get interrupt on CBI\n");
 612                 us->ip_wanted = 0;
 613                 return USB_STOR_TRANSPORT_ERROR;
 614         }
 615         debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
 616               us->ip_data, us->pusb_dev->irq_act_len,
 617               us->pusb_dev->irq_status);
 618         /* UFI gives us ASC and ASCQ, like a request sense */
 619         if (us->subclass == US_SC_UFI) {
 620                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 621                     srb->cmd[0] == SCSI_INQUIRY)
 622                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 623                 else if (us->ip_data)
 624                         return USB_STOR_TRANSPORT_FAILED;
 625                 else
 626                         return USB_STOR_TRANSPORT_GOOD;
 627         }
 628         /* otherwise, we interpret the data normally */
 629         switch (us->ip_data) {
 630         case 0x0001:
 631                 return USB_STOR_TRANSPORT_GOOD;
 632         case 0x0002:
 633                 return USB_STOR_TRANSPORT_FAILED;
 634         default:
 635                 return USB_STOR_TRANSPORT_ERROR;
 636         }                       /* switch */
 637         return USB_STOR_TRANSPORT_ERROR;
 638 }
 639
 640 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 641 #define USB_TRANSPORT_NOT_READY_RETRY 10
 642
 643 /* clear a stall on an endpoint - special for BBB devices */
 644 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 645 {
 646         int result;
 647
 648         /* ENDPOINT_HALT = 0, so set value to 0 */
 649         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 650                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
 651                                 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 652         return result;
 653 }
 654
 655 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
 656 {
 657         int result, retry;
 658         int dir_in;
 659         int actlen, data_actlen;
 660         unsigned int pipe, pipein, pipeout;
 661         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_csw_t, csw, 1);
 662 #ifdef BBB_XPORT_TRACE
 663         unsigned char *ptr;
 664         int index;
 665 #endif
 666
 667         dir_in = US_DIRECTION(srb->cmd[0]);
 668
 669         /* COMMAND phase */
 670         debug("COMMAND phase\n");
 671         result = usb_stor_BBB_comdat(srb, us);
 672         if (result < 0) {
 673                 debug("failed to send CBW status %ld\n",
 674                       us->pusb_dev->status);
 675                 usb_stor_BBB_reset(us);
 676                 return USB_STOR_TRANSPORT_FAILED;
 677         }
 678         if (!(us->flags & USB_READY))
 679                 mdelay(5);
 680         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 681         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 682         /* DATA phase + error handling */
 683         data_actlen = 0;
 684         /* no data, go immediately to the STATUS phase */
 685         if (srb->datalen == 0)
 686                 goto st;
 687         debug("DATA phase\n");
 688         if (dir_in)
 689                 pipe = pipein;
 690         else
 691                 pipe = pipeout;
 692         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 693                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 694         /* special handling of STALL in DATA phase */
 695         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 696                 debug("DATA:stall\n");
 697                 /* clear the STALL on the endpoint */
 698                 result = usb_stor_BBB_clear_endpt_stall(us,
 699                                         dir_in ? us->ep_in : us->ep_out);
 700                 if (result >= 0)
 701                         /* continue on to STATUS phase */
 702                         goto st;
 703         }
 704         if (result < 0) {
 705                 debug("usb_bulk_msg error status %ld\n",
 706                       us->pusb_dev->status);
 707                 usb_stor_BBB_reset(us);
 708                 return USB_STOR_TRANSPORT_FAILED;
 709         }
 710 #ifdef BBB_XPORT_TRACE
 711         for (index = 0; index < data_actlen; index++)
 712                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 713         printf("\n");
 714 #endif
 715         /* STATUS phase + error handling */
 716 st:
 717         retry = 0;
 718 again:
 719         debug("STATUS phase\n");
 720         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 721                                 &actlen, USB_CNTL_TIMEOUT*5);
 722
 723         /* special handling of STALL in STATUS phase */
 724         if ((result < 0) && (retry < 1) &&
 725             (us->pusb_dev->status & USB_ST_STALLED)) {
 726                 debug("STATUS:stall\n");
 727                 /* clear the STALL on the endpoint */
 728                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 729                 if (result >= 0 && (retry++ < 1))
 730                         /* do a retry */
 731                         goto again;
 732         }
 733         if (result < 0) {
 734                 debug("usb_bulk_msg error status %ld\n",
 735                       us->pusb_dev->status);
 736                 usb_stor_BBB_reset(us);
 737                 return USB_STOR_TRANSPORT_FAILED;
 738         }
 739 #ifdef BBB_XPORT_TRACE
 740         ptr = (unsigned char *)csw;
 741         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 742                 printf("ptr[%d] %#x ", index, ptr[index]);
 743         printf("\n");
 744 #endif
 745         /* misuse pipe to get the residue */
 746         pipe = le32_to_cpu(csw->dCSWDataResidue);
 747         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 748                 pipe = srb->datalen - data_actlen;
 749         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 750                 debug("!CSWSIGNATURE\n");
 751                 usb_stor_BBB_reset(us);
 752                 return USB_STOR_TRANSPORT_FAILED;
 753         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 754                 debug("!Tag\n");
 755                 usb_stor_BBB_reset(us);
 756                 return USB_STOR_TRANSPORT_FAILED;
 757         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 758                 debug(">PHASE\n");
 759                 usb_stor_BBB_reset(us);
 760                 return USB_STOR_TRANSPORT_FAILED;
 761         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 762                 debug("=PHASE\n");
 763                 usb_stor_BBB_reset(us);
 764                 return USB_STOR_TRANSPORT_FAILED;
 765         } else if (data_actlen > srb->datalen) {
 766                 debug("transferred %dB instead of %ldB\n",
 767                       data_actlen, srb->datalen);
 768                 return USB_STOR_TRANSPORT_FAILED;
 769         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 770                 debug("FAILED\n");
 771                 return USB_STOR_TRANSPORT_FAILED;
 772         }
 773
 774         return result;
 775 }
 776
 777 static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 778 {
 779         int result, status;
 780         ccb *psrb;
 781         ccb reqsrb;
 782         int retry, notready;
 783
 784         psrb = &reqsrb;
 785         status = USB_STOR_TRANSPORT_GOOD;
 786         retry = 0;
 787         notready = 0;
 788         /* issue the command */
 789 do_retry:
 790         result = usb_stor_CB_comdat(srb, us);
 791         debug("command / Data returned %d, status %lX\n",
 792               result, us->pusb_dev->status);
 793         /* if this is an CBI Protocol, get IRQ */
 794         if (us->protocol == US_PR_CBI) {
 795                 status = usb_stor_CBI_get_status(srb, us);
 796                 /* if the status is error, report it */
 797                 if (status == USB_STOR_TRANSPORT_ERROR) {
 798                         debug(" USB CBI Command Error\n");
 799                         return status;
 800                 }
 801                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 802                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 803                 if (!us->ip_data) {
 804                         /* if the status is good, report it */
 805                         if (status == USB_STOR_TRANSPORT_GOOD) {
 806                                 debug(" USB CBI Command Good\n");
 807                                 return status;
 808                         }
 809                 }
 810         }
 811         /* do we have to issue an auto request? */
 812         /* HERE we have to check the result */
 813         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 814                 debug("ERROR %lX\n", us->pusb_dev->status);
 815                 us->transport_reset(us);
 816                 return USB_STOR_TRANSPORT_ERROR;
 817         }
 818         if ((us->protocol == US_PR_CBI) &&
 819             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 820             (srb->cmd[0] == SCSI_INQUIRY))) {
 821                 /* do not issue an autorequest after request sense */
 822                 debug("No auto request and good\n");
 823                 return USB_STOR_TRANSPORT_GOOD;
 824         }
 825         /* issue an request_sense */
 826         memset(&psrb->cmd[0], 0, 12);
 827         psrb->cmd[0] = SCSI_REQ_SENSE;
 828         psrb->cmd[1] = srb->lun << 5;
 829         psrb->cmd[4] = 18;
 830         psrb->datalen = 18;
 831         psrb->pdata = &srb->sense_buf[0];
 832         psrb->cmdlen = 12;
 833         /* issue the command */
 834         result = usb_stor_CB_comdat(psrb, us);
 835         debug("auto request returned %d\n", result);
 836         /* if this is an CBI Protocol, get IRQ */
 837         if (us->protocol == US_PR_CBI)
 838                 status = usb_stor_CBI_get_status(psrb, us);
 839
 840         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 841                 debug(" AUTO REQUEST ERROR %ld\n",
 842                       us->pusb_dev->status);
 843                 return USB_STOR_TRANSPORT_ERROR;
 844         }
 845         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 846               srb->sense_buf[0], srb->sense_buf[2],
 847               srb->sense_buf[12], srb->sense_buf[13]);
 848         /* Check the auto request result */
 849         if ((srb->sense_buf[2] == 0) &&
 850             (srb->sense_buf[12] == 0) &&
 851             (srb->sense_buf[13] == 0)) {
 852                 /* ok, no sense */
 853                 return USB_STOR_TRANSPORT_GOOD;
 854         }
 855
 856         /* Check the auto request result */
 857         switch (srb->sense_buf[2]) {
 858         case 0x01:
 859                 /* Recovered Error */
 860                 return USB_STOR_TRANSPORT_GOOD;
 861                 break;
 862         case 0x02:
 863                 /* Not Ready */
 864                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 865                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 866                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 867                                 srb->sense_buf[0], srb->sense_buf[2],
 868                                 srb->sense_buf[12], srb->sense_buf[13]);
 869                         return USB_STOR_TRANSPORT_FAILED;
 870                 } else {
 871                         mdelay(100);
 872                         goto do_retry;
 873                 }
 874                 break;
 875         default:
 876                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 877                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 878                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 879                                 srb->sense_buf[2], srb->sense_buf[12],
 880                                 srb->sense_buf[13]);
 881                         return USB_STOR_TRANSPORT_FAILED;
 882                 } else
 883                         goto do_retry;
 884                 break;
 885         }
 886         return USB_STOR_TRANSPORT_FAILED;
 887 }
 888
 889
 890 static int usb_inquiry(ccb *srb, struct us_data *ss)
 891 {
 892         int retry, i;
 893         retry = 5;
 894         do {
 895                 memset(&srb->cmd[0], 0, 12);
 896                 srb->cmd[0] = SCSI_INQUIRY;
 897                 srb->cmd[1] = srb->lun << 5;
 898                 srb->cmd[4] = 36;
 899                 srb->datalen = 36;
 900                 srb->cmdlen = 12;
 901                 i = ss->transport(srb, ss);
 902                 debug("inquiry returns %d\n", i);
 903                 if (i == 0)
 904                         break;
 905         } while (--retry);
 906
 907         if (!retry) {
 908                 printf("error in inquiry\n");
 909                 return -1;
 910         }
 911         return 0;
 912 }
 913
 914 static int usb_request_sense(ccb *srb, struct us_data *ss)
 915 {
 916         char *ptr;
 917
 918         ptr = (char *)srb->pdata;
 919         memset(&srb->cmd[0], 0, 12);
 920         srb->cmd[0] = SCSI_REQ_SENSE;
 921         srb->cmd[1] = srb->lun << 5;
 922         srb->cmd[4] = 18;
 923         srb->datalen = 18;
 924         srb->pdata = &srb->sense_buf[0];
 925         srb->cmdlen = 12;
 926         ss->transport(srb, ss);
 927         debug("Request Sense returned %02X %02X %02X\n",
 928               srb->sense_buf[2], srb->sense_buf[12],
 929               srb->sense_buf[13]);
 930         srb->pdata = (uchar *)ptr;
 931         return 0;
 932 }
 933
 934 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
 935 {
 936         int retries = 10;
 937
 938         do {
 939                 memset(&srb->cmd[0], 0, 12);
 940                 srb->cmd[0] = SCSI_TST_U_RDY;
 941                 srb->cmd[1] = srb->lun << 5;
 942                 srb->datalen = 0;
 943                 srb->cmdlen = 12;
 944                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
 945                         ss->flags |= USB_READY;
 946                         return 0;
 947                 }
 948                 usb_request_sense(srb, ss);
 949                 /*
 950                  * Check the Key Code Qualifier, if it matches
 951                  * "Not Ready - medium not present"
 952                  * (the sense Key equals 0x2 and the ASC is 0x3a)
 953                  * return immediately as the medium being absent won't change
 954                  * unless there is a user action.
 955                  */
 956                 if ((srb->sense_buf[2] == 0x02) &&
 957                     (srb->sense_buf[12] == 0x3a))
 958                         return -1;
 959                 mdelay(100);
 960         } while (retries--);
 961
 962         return -1;
 963 }
 964
 965 static int usb_read_capacity(ccb *srb, struct us_data *ss)
 966 {
 967         int retry;
 968         /* XXX retries */
 969         retry = 3;
 970         do {
 971                 memset(&srb->cmd[0], 0, 12);
 972                 srb->cmd[0] = SCSI_RD_CAPAC;
 973                 srb->cmd[1] = srb->lun << 5;
 974                 srb->datalen = 8;
 975                 srb->cmdlen = 12;
 976                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 977                         return 0;
 978         } while (retry--);
 979
 980         return -1;
 981 }
 982
 983 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
 984                        unsigned short blocks)
 985 {
 986         memset(&srb->cmd[0], 0, 12);
 987         srb->cmd[0] = SCSI_READ10;
 988         srb->cmd[1] = srb->lun << 5;
 989         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 990         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
 991         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
 992         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
 993         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
 994         srb->cmd[8] = (unsigned char) blocks & 0xff;
 995         srb->cmdlen = 12;
 996         debug("read10: start %lx blocks %x\n", start, blocks);
 997         return ss->transport(srb, ss);
 998 }
 999
1000 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
1001                         unsigned short blocks)
1002 {
1003         memset(&srb->cmd[0], 0, 12);
1004         srb->cmd[0] = SCSI_WRITE10;
1005         srb->cmd[1] = srb->lun << 5;
1006         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1007         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1008         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1009         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1010         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1011         srb->cmd[8] = (unsigned char) blocks & 0xff;
1012         srb->cmdlen = 12;
1013         debug("write10: start %lx blocks %x\n", start, blocks);
1014         return ss->transport(srb, ss);
1015 }
1016
1017
1018 #ifdef CONFIG_USB_BIN_FIXUP
1019 /*
1020  * Some USB storage devices queried for SCSI identification data respond with
1021  * binary strings, which if output to the console freeze the terminal. The
1022  * workaround is to modify the vendor and product strings read from such
1023  * device with proper values (as reported by 'usb info').
1024  *
1025  * Vendor and product length limits are taken from the definition of
1026  * block_dev_desc_t in include/part.h.
1027  */
1028 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1029                                 unsigned char vendor[],
1030                                 unsigned char product[]) {
1031         const unsigned char max_vendor_len = 40;
1032         const unsigned char max_product_len = 20;
1033         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1034                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1035                 strncpy((char *)product, "Flash Media Cntrller",
1036                         max_product_len);
1037         }
1038 }
1039 #endif /* CONFIG_USB_BIN_FIXUP */
1040
1041 unsigned long usb_stor_read(int device, lbaint_t blknr,
1042                             lbaint_t blkcnt, void *buffer)
1043 {
1044         lbaint_t start, blks;
1045         uintptr_t buf_addr;
1046         unsigned short smallblks;
1047         struct usb_device *dev;
1048         struct us_data *ss;
1049         int retry, i;
1050         ccb *srb = &usb_ccb;
1051
1052         if (blkcnt == 0)
1053                 return 0;
1054
1055         device &= 0xff;
1056         /* Setup  device */
1057         debug("\nusb_read: dev %d \n", device);
1058         dev = NULL;
1059         for (i = 0; i < USB_MAX_DEVICE; i++) {
1060                 dev = usb_get_dev_index(i);
1061                 if (dev == NULL)
1062                         return 0;
1063                 if (dev->devnum == usb_dev_desc[device].target)
1064                         break;
1065         }
1066         ss = (struct us_data *)dev->privptr;
1067
1068         usb_disable_asynch(1); /* asynch transfer not allowed */
1069         srb->lun = usb_dev_desc[device].lun;
1070         buf_addr = (unsigned long)buffer;
1071         start = blknr;
1072         blks = blkcnt;
1073
1074         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
1075               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1076
1077         do {
1078                 /* XXX need some comment here */
1079                 retry = 2;
1080                 srb->pdata = (unsigned char *)buf_addr;
1081                 if (blks > USB_MAX_XFER_BLK)
1082                         smallblks = USB_MAX_XFER_BLK;
1083                 else
1084                         smallblks = (unsigned short) blks;
1085 retry_it:
1086                 if (smallblks == USB_MAX_XFER_BLK)
1087                         usb_show_progress();
1088                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1089                 srb->pdata = (unsigned char *)buf_addr;
1090                 if (usb_read_10(srb, ss, start, smallblks)) {
1091                         debug("Read ERROR\n");
1092                         usb_request_sense(srb, ss);
1093                         if (retry--)
1094                                 goto retry_it;
1095                         blkcnt -= blks;
1096                         break;
1097                 }
1098                 start += smallblks;
1099                 blks -= smallblks;
1100                 buf_addr += srb->datalen;
1101         } while (blks != 0);
1102         ss->flags &= ~USB_READY;
1103
1104         debug("usb_read: end startblk " LBAF
1105               ", blccnt %x buffer %" PRIxPTR "\n",
1106               start, smallblks, buf_addr);
1107
1108         usb_disable_asynch(0); /* asynch transfer allowed */
1109         if (blkcnt >= USB_MAX_XFER_BLK)
1110                 debug("\n");
1111         return blkcnt;
1112 }
1113
1114 unsigned long usb_stor_write(int device, lbaint_t blknr,
1115                                 lbaint_t blkcnt, const void *buffer)
1116 {
1117         lbaint_t start, blks;
1118         uintptr_t buf_addr;
1119         unsigned short smallblks;
1120         struct usb_device *dev;
1121         struct us_data *ss;
1122         int retry, i;
1123         ccb *srb = &usb_ccb;
1124
1125         if (blkcnt == 0)
1126                 return 0;
1127
1128         device &= 0xff;
1129         /* Setup  device */
1130         debug("\nusb_write: dev %d \n", device);
1131         dev = NULL;
1132         for (i = 0; i < USB_MAX_DEVICE; i++) {
1133                 dev = usb_get_dev_index(i);
1134                 if (dev == NULL)
1135                         return 0;
1136                 if (dev->devnum == usb_dev_desc[device].target)
1137                         break;
1138         }
1139         ss = (struct us_data *)dev->privptr;
1140
1141         usb_disable_asynch(1); /* asynch transfer not allowed */
1142
1143         srb->lun = usb_dev_desc[device].lun;
1144         buf_addr = (unsigned long)buffer;
1145         start = blknr;
1146         blks = blkcnt;
1147
1148         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
1149               " buffer %" PRIxPTR "\n", device, start, blks, buf_addr);
1150
1151         do {
1152                 /* If write fails retry for max retry count else
1153                  * return with number of blocks written successfully.
1154                  */
1155                 retry = 2;
1156                 srb->pdata = (unsigned char *)buf_addr;
1157                 if (blks > USB_MAX_XFER_BLK)
1158                         smallblks = USB_MAX_XFER_BLK;
1159                 else
1160                         smallblks = (unsigned short) blks;
1161 retry_it:
1162                 if (smallblks == USB_MAX_XFER_BLK)
1163                         usb_show_progress();
1164                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1165                 srb->pdata = (unsigned char *)buf_addr;
1166                 if (usb_write_10(srb, ss, start, smallblks)) {
1167                         debug("Write ERROR\n");
1168                         usb_request_sense(srb, ss);
1169                         if (retry--)
1170                                 goto retry_it;
1171                         blkcnt -= blks;
1172                         break;
1173                 }
1174                 start += smallblks;
1175                 blks -= smallblks;
1176                 buf_addr += srb->datalen;
1177         } while (blks != 0);
1178         ss->flags &= ~USB_READY;
1179
1180         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1181               PRIxPTR "\n", start, smallblks, buf_addr);
1182
1183         usb_disable_asynch(0); /* asynch transfer allowed */
1184         if (blkcnt >= USB_MAX_XFER_BLK)
1185                 debug("\n");
1186         return blkcnt;
1187
1188 }
1189
1190 /* Probe to see if a new device is actually a Storage device */
1191 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1192                       struct us_data *ss)
1193 {
1194         struct usb_interface *iface;
1195         int i;
1196         struct usb_endpoint_descriptor *ep_desc;
1197         unsigned int flags = 0;
1198
1199         int protocol = 0;
1200         int subclass = 0;
1201
1202         /* let's examine the device now */
1203         iface = &dev->config.if_desc[ifnum];
1204
1205 #if 0
1206         /* this is the place to patch some storage devices */
1207         debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1208                         dev->descriptor.idProduct);
1209
1210         if ((dev->descriptor.idVendor) == 0x066b &&
1211             (dev->descriptor.idProduct) == 0x0103) {
1212                 debug("patched for E-USB\n");
1213                 protocol = US_PR_CB;
1214                 subclass = US_SC_UFI;       /* an assumption */
1215         }
1216 #endif
1217
1218         if (dev->descriptor.bDeviceClass != 0 ||
1219                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1220                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1221                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1222                 /* if it's not a mass storage, we go no further */
1223                 return 0;
1224         }
1225
1226         memset(ss, 0, sizeof(struct us_data));
1227
1228         /* At this point, we know we've got a live one */
1229         debug("\n\nUSB Mass Storage device detected\n");
1230
1231         /* Initialize the us_data structure with some useful info */
1232         ss->flags = flags;
1233         ss->ifnum = ifnum;
1234         ss->pusb_dev = dev;
1235         ss->attention_done = 0;
1236
1237         /* If the device has subclass and protocol, then use that.  Otherwise,
1238          * take data from the specific interface.
1239          */
1240         if (subclass) {
1241                 ss->subclass = subclass;
1242                 ss->protocol = protocol;
1243         } else {
1244                 ss->subclass = iface->desc.bInterfaceSubClass;
1245                 ss->protocol = iface->desc.bInterfaceProtocol;
1246         }
1247
1248         /* set the handler pointers based on the protocol */
1249         debug("Transport: ");
1250         switch (ss->protocol) {
1251         case US_PR_CB:
1252                 debug("Control/Bulk\n");
1253                 ss->transport = usb_stor_CB_transport;
1254                 ss->transport_reset = usb_stor_CB_reset;
1255                 break;
1256
1257         case US_PR_CBI:
1258                 debug("Control/Bulk/Interrupt\n");
1259                 ss->transport = usb_stor_CB_transport;
1260                 ss->transport_reset = usb_stor_CB_reset;
1261                 break;
1262         case US_PR_BULK:
1263                 debug("Bulk/Bulk/Bulk\n");
1264                 ss->transport = usb_stor_BBB_transport;
1265                 ss->transport_reset = usb_stor_BBB_reset;
1266                 break;
1267         default:
1268                 printf("USB Storage Transport unknown / not yet implemented\n");
1269                 return 0;
1270                 break;
1271         }
1272
1273         /*
1274          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1275          * An optional interrupt is OK (necessary for CBI protocol).
1276          * We will ignore any others.
1277          */
1278         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1279                 ep_desc = &iface->ep_desc[i];
1280                 /* is it an BULK endpoint? */
1281                 if ((ep_desc->bmAttributes &
1282                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1283                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1284                                 ss->ep_in = ep_desc->bEndpointAddress &
1285                                                 USB_ENDPOINT_NUMBER_MASK;
1286                         else
1287                                 ss->ep_out =
1288                                         ep_desc->bEndpointAddress &
1289                                         USB_ENDPOINT_NUMBER_MASK;
1290                 }
1291
1292                 /* is it an interrupt endpoint? */
1293                 if ((ep_desc->bmAttributes &
1294                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1295                         ss->ep_int = ep_desc->bEndpointAddress &
1296                                                 USB_ENDPOINT_NUMBER_MASK;
1297                         ss->irqinterval = ep_desc->bInterval;
1298                 }
1299         }
1300         debug("Endpoints In %d Out %d Int %d\n",
1301               ss->ep_in, ss->ep_out, ss->ep_int);
1302
1303         /* Do some basic sanity checks, and bail if we find a problem */
1304         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1305             !ss->ep_in || !ss->ep_out ||
1306             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1307                 debug("Problems with device\n");
1308                 return 0;
1309         }
1310         /* set class specific stuff */
1311         /* We only handle certain protocols.  Currently, these are
1312          * the only ones.
1313          * The SFF8070 accepts the requests used in u-boot
1314          */
1315         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1316             ss->subclass != US_SC_8070) {
1317                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1318                 return 0;
1319         }
1320         if (ss->ep_int) {
1321                 /* we had found an interrupt endpoint, prepare irq pipe
1322                  * set up the IRQ pipe and handler
1323                  */
1324                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1325                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1326                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1327                 dev->irq_handle = usb_stor_irq;
1328         }
1329         dev->privptr = (void *)ss;
1330         return 1;
1331 }
1332
1333 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1334                       block_dev_desc_t *dev_desc)
1335 {
1336         unsigned char perq, modi;
1337         ALLOC_CACHE_ALIGN_BUFFER(unsigned long, cap, 2);
1338         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, usb_stor_buf, 36);
1339         unsigned long *capacity, *blksz;
1340         ccb *pccb = &usb_ccb;
1341
1342         pccb->pdata = usb_stor_buf;
1343
1344         dev_desc->target = dev->devnum;
1345         pccb->lun = dev_desc->lun;
1346         debug(" address %d\n", dev_desc->target);
1347
1348         if (usb_inquiry(pccb, ss))
1349                 return -1;
1350
1351         perq = usb_stor_buf[0];
1352         modi = usb_stor_buf[1];
1353
1354         /*
1355          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1356          * they would not respond to test_unit_ready .
1357          */
1358         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1359                 return 0;
1360         }
1361         if ((modi&0x80) == 0x80) {
1362                 /* drive is removable */
1363                 dev_desc->removable = 1;
1364         }
1365         memcpy(&dev_desc->vendor[0], (const void *) &usb_stor_buf[8], 8);
1366         memcpy(&dev_desc->product[0], (const void *) &usb_stor_buf[16], 16);
1367         memcpy(&dev_desc->revision[0], (const void *) &usb_stor_buf[32], 4);
1368         dev_desc->vendor[8] = 0;
1369         dev_desc->product[16] = 0;
1370         dev_desc->revision[4] = 0;
1371 #ifdef CONFIG_USB_BIN_FIXUP
1372         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1373                       (uchar *)dev_desc->product);
1374 #endif /* CONFIG_USB_BIN_FIXUP */
1375         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1376               usb_stor_buf[3]);
1377         if (usb_test_unit_ready(pccb, ss)) {
1378                 printf("Device NOT ready\n"
1379                        "   Request Sense returned %02X %02X %02X\n",
1380                        pccb->sense_buf[2], pccb->sense_buf[12],
1381                        pccb->sense_buf[13]);
1382                 if (dev_desc->removable == 1) {
1383                         dev_desc->type = perq;
1384                         return 1;
1385                 }
1386                 return 0;
1387         }
1388         pccb->pdata = (unsigned char *)&cap[0];
1389         memset(pccb->pdata, 0, 8);
1390         if (usb_read_capacity(pccb, ss) != 0) {
1391                 printf("READ_CAP ERROR\n");
1392                 cap[0] = 2880;
1393                 cap[1] = 0x200;
1394         }
1395         ss->flags &= ~USB_READY;
1396         debug("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0], cap[1]);
1397 #if 0
1398         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1399                 cap[0] >>= 16;
1400 #endif
1401         cap[0] = cpu_to_be32(cap[0]);
1402         cap[1] = cpu_to_be32(cap[1]);
1403
1404         /* this assumes bigendian! */
1405         cap[0] += 1;
1406         capacity = &cap[0];
1407         blksz = &cap[1];
1408         debug("Capacity = 0x%lx, blocksz = 0x%lx\n", *capacity, *blksz);
1409         dev_desc->lba = *capacity;
1410         dev_desc->blksz = *blksz;
1411         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1412         dev_desc->type = perq;
1413         debug(" address %d\n", dev_desc->target);
1414         debug("partype: %d\n", dev_desc->part_type);
1415
1416         init_part(dev_desc);
1417
1418         debug("partype: %d\n", dev_desc->part_type);
1419         return 1;
1420 }