git.sur5r.net Git - u-boot/blob - common/usb_storage.c

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