common/usb_storage.c

   1 /*
   2  * Most of this source has been derived from the Linux USB
   3  * project:
   4  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   5  *   (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
   6  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
   7  *   (c) 2000 Yggdrasil Computing, Inc.
   8  *
   9  *
  10  * Adapted for U-Boot:
  11  *   (C) Copyright 2001 Denis Peter, MPL AG Switzerland
  12  *
  13  * For BBB support (C) Copyright 2003
  14  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
  15  *
  16  * BBB support based on /sys/dev/usb/umass.c from
  17  * FreeBSD.
  18  *
  19  * See file CREDITS for list of people who contributed to this
  20  * project.
  21  *
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License as
  24  * published by the Free Software Foundation; either version 2 of
  25  * the License, or (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  35  * MA 02111-1307 USA
  36  *
  37  */
  38
  39 /* Note:
  40  * Currently only the CBI transport protocoll has been implemented, and it
  41  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
  42  * transport protocoll may work as well.
  43  */
  44 /*
  45  * New Note:
  46  * Support for USB Mass Storage Devices (BBB) has been added. It has
  47  * only been tested with USB memory sticks.
  48  */
  49
  50
  51 #include <common.h>
  52 #include <command.h>
  53 #include <asm/byteorder.h>
  54 #include <asm/processor.h>
  55
  56 #include <part.h>
  57 #include <usb.h>
  58
  59 #undef BBB_COMDAT_TRACE
  60 #undef BBB_XPORT_TRACE
  61
  62 #ifdef  USB_STOR_DEBUG
  63 #define USB_BLK_DEBUG   1
  64 #else
  65 #define USB_BLK_DEBUG   0
  66 #endif
  67
  68 #define USB_STOR_PRINTF(fmt, args...)   debug_cond(USB_BLK_DEBUG, fmt, ##args)
  69
  70 #include <scsi.h>
  71 /* direction table -- this indicates the direction of the data
  72  * transfer for each command code -- a 1 indicates input
  73  */
  74 static const unsigned char us_direction[256/8] = {
  75         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  76         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  77         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  78         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  79 };
  80 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  81
  82 static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
  83
  84 /*
  85  * CBI style
  86  */
  87
  88 #define US_CBI_ADSC             0
  89
  90 /*
  91  * BULK only
  92  */
  93 #define US_BBB_RESET            0xff
  94 #define US_BBB_GET_MAX_LUN      0xfe
  95
  96 /* Command Block Wrapper */
  97 typedef struct {
  98         __u32           dCBWSignature;
  99 #       define CBWSIGNATURE     0x43425355
 100         __u32           dCBWTag;
 101         __u32           dCBWDataTransferLength;
 102         __u8            bCBWFlags;
 103 #       define CBWFLAGS_OUT     0x00
 104 #       define CBWFLAGS_IN      0x80
 105         __u8            bCBWLUN;
 106         __u8            bCDBLength;
 107 #       define CBWCDBLENGTH     16
 108         __u8            CBWCDB[CBWCDBLENGTH];
 109 } umass_bbb_cbw_t;
 110 #define UMASS_BBB_CBW_SIZE      31
 111 static __u32 CBWTag;
 112
 113 /* Command Status Wrapper */
 114 typedef struct {
 115         __u32           dCSWSignature;
 116 #       define CSWSIGNATURE     0x53425355
 117         __u32           dCSWTag;
 118         __u32           dCSWDataResidue;
 119         __u8            bCSWStatus;
 120 #       define CSWSTATUS_GOOD   0x0
 121 #       define CSWSTATUS_FAILED 0x1
 122 #       define CSWSTATUS_PHASE  0x2
 123 } umass_bbb_csw_t;
 124 #define UMASS_BBB_CSW_SIZE      13
 125
 126 #define USB_MAX_STOR_DEV 5
 127 static int usb_max_devs; /* number of highest available usb device */
 128
 129 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
 130
 131 struct us_data;
 132 typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
 133 typedef int (*trans_reset)(struct us_data *data);
 134
 135 struct us_data {
 136         struct usb_device *pusb_dev;     /* this usb_device */
 137
 138         unsigned int    flags;                  /* from filter initially */
 139         unsigned char   ifnum;                  /* interface number */
 140         unsigned char   ep_in;                  /* in endpoint */
 141         unsigned char   ep_out;                 /* out ....... */
 142         unsigned char   ep_int;                 /* interrupt . */
 143         unsigned char   subclass;               /* as in overview */
 144         unsigned char   protocol;               /* .............. */
 145         unsigned char   attention_done;         /* force attn on first cmd */
 146         unsigned short  ip_data;                /* interrupt data */
 147         int             action;                 /* what to do */
 148         int             ip_wanted;              /* needed */
 149         int             *irq_handle;            /* for USB int requests */
 150         unsigned int    irqpipe;                /* pipe for release_irq */
 151         unsigned char   irqmaxp;                /* max packed for irq Pipe */
 152         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
 153         ccb             *srb;                   /* current srb */
 154         trans_reset     transport_reset;        /* reset routine */
 155         trans_cmnd      transport;              /* transport routine */
 156 };
 157
 158 #ifdef CONFIG_USB_EHCI
 159 /*
 160  * The U-Boot EHCI driver cannot handle more than 5 page aligned buffers
 161  * of 4096 bytes in a transfer without running itself out of qt_buffers
 162  */
 163 #define USB_MAX_XFER_BLK(start, blksz)  (((4096 * 5) - (start % 4096)) / blksz)
 164 #else
 165 #define USB_MAX_XFER_BLK(start, blksz)  20
 166 #endif
 167
 168 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 169
 170
 171 #define USB_STOR_TRANSPORT_GOOD    0
 172 #define USB_STOR_TRANSPORT_FAILED -1
 173 #define USB_STOR_TRANSPORT_ERROR  -2
 174
 175 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
 176                       block_dev_desc_t *dev_desc);
 177 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 178                       struct us_data *ss);
 179 unsigned long usb_stor_read(int device, unsigned long blknr,
 180                             unsigned long blkcnt, void *buffer);
 181 unsigned long usb_stor_write(int device, unsigned long blknr,
 182                              unsigned long blkcnt, const void *buffer);
 183 struct usb_device * usb_get_dev_index(int index);
 184 void uhci_show_temp_int_td(void);
 185
 186 #ifdef CONFIG_PARTITIONS
 187 block_dev_desc_t *usb_stor_get_dev(int index)
 188 {
 189         return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
 190 }
 191 #endif
 192
 193 void usb_show_progress(void)
 194 {
 195         debug(".");
 196 }
 197
 198 /*******************************************************************************
 199  * show info on storage devices; 'usb start/init' must be invoked earlier
 200  * as we only retrieve structures populated during devices initialization
 201  */
 202 int usb_stor_info(void)
 203 {
 204         int i;
 205
 206         if (usb_max_devs > 0) {
 207                 for (i = 0; i < usb_max_devs; i++) {
 208                         printf("  Device %d: ", i);
 209                         dev_print(&usb_dev_desc[i]);
 210                 }
 211                 return 0;
 212         }
 213
 214         printf("No storage devices, perhaps not 'usb start'ed..?\n");
 215         return 1;
 216 }
 217
 218 static unsigned int usb_get_max_lun(struct us_data *us)
 219 {
 220         int len;
 221         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
 222         len = usb_control_msg(us->pusb_dev,
 223                               usb_rcvctrlpipe(us->pusb_dev, 0),
 224                               US_BBB_GET_MAX_LUN,
 225                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 226                               0, us->ifnum,
 227                               result, sizeof(char),
 228                               USB_CNTL_TIMEOUT * 5);
 229         USB_STOR_PRINTF("Get Max LUN -> len = %i, result = %i\n",
 230                         len, (int) *result);
 231         return (len > 0) ? *result : 0;
 232 }
 233
 234 /*******************************************************************************
 235  * scan the usb and reports device info
 236  * to the user if mode = 1
 237  * returns current device or -1 if no
 238  */
 239 int usb_stor_scan(int mode)
 240 {
 241         unsigned char i;
 242         struct usb_device *dev;
 243
 244         if (mode == 1)
 245                 printf("       scanning bus for storage devices... ");
 246
 247         usb_disable_asynch(1); /* asynch transfer not allowed */
 248
 249         for (i = 0; i < USB_MAX_STOR_DEV; i++) {
 250                 memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
 251                 usb_dev_desc[i].if_type = IF_TYPE_USB;
 252                 usb_dev_desc[i].dev = i;
 253                 usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
 254                 usb_dev_desc[i].target = 0xff;
 255                 usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
 256                 usb_dev_desc[i].block_read = usb_stor_read;
 257                 usb_dev_desc[i].block_write = usb_stor_write;
 258         }
 259
 260         usb_max_devs = 0;
 261         for (i = 0; i < USB_MAX_DEVICE; i++) {
 262                 dev = usb_get_dev_index(i); /* get device */
 263                 USB_STOR_PRINTF("i=%d\n", i);
 264                 if (dev == NULL)
 265                         break; /* no more devices available */
 266
 267                 if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
 268                         /* OK, it's a storage device.  Iterate over its LUNs
 269                          * and populate `usb_dev_desc'.
 270                          */
 271                         int lun, max_lun, start = usb_max_devs;
 272
 273                         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
 274                         for (lun = 0;
 275                              lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
 276                              lun++) {
 277                                 usb_dev_desc[usb_max_devs].lun = lun;
 278                                 if (usb_stor_get_info(dev, &usb_stor[start],
 279                                                       &usb_dev_desc[usb_max_devs]) == 1) {
 280                                 usb_max_devs++;
 281                 }
 282                         }
 283                 }
 284                 /* if storage device */
 285                 if (usb_max_devs == USB_MAX_STOR_DEV) {
 286                         printf("max USB Storage Device reached: %d stopping\n",
 287                                 usb_max_devs);
 288                         break;
 289                 }
 290         } /* for */
 291
 292         usb_disable_asynch(0); /* asynch transfer allowed */
 293         printf("%d Storage Device(s) found\n", usb_max_devs);
 294         if (usb_max_devs > 0)
 295                 return 0;
 296         return -1;
 297 }
 298
 299 static int usb_stor_irq(struct usb_device *dev)
 300 {
 301         struct us_data *us;
 302         us = (struct us_data *)dev->privptr;
 303
 304         if (us->ip_wanted)
 305                 us->ip_wanted = 0;
 306         return 0;
 307 }
 308
 309
 310 #ifdef  USB_STOR_DEBUG
 311
 312 static void usb_show_srb(ccb *pccb)
 313 {
 314         int i;
 315         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
 316         for (i = 0; i < 12; i++)
 317                 printf("%02X ", pccb->cmd[i]);
 318         printf("\n");
 319 }
 320
 321 static void display_int_status(unsigned long tmp)
 322 {
 323         printf("Status: %s %s %s %s %s %s %s\n",
 324                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 325                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 326                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 327                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 328                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 329                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 330                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 331 }
 332 #endif
 333 /***********************************************************************
 334  * Data transfer routines
 335  ***********************************************************************/
 336
 337 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 338 {
 339         int max_size;
 340         int this_xfer;
 341         int result;
 342         int partial;
 343         int maxtry;
 344         int stat;
 345
 346         /* determine the maximum packet size for these transfers */
 347         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 348
 349         /* while we have data left to transfer */
 350         while (length) {
 351
 352                 /* calculate how long this will be -- maximum or a remainder */
 353                 this_xfer = length > max_size ? max_size : length;
 354                 length -= this_xfer;
 355
 356                 /* setup the retry counter */
 357                 maxtry = 10;
 358
 359                 /* set up the transfer loop */
 360                 do {
 361                         /* transfer the data */
 362                         USB_STOR_PRINTF("Bulk xfer 0x%x(%d) try #%d\n",
 363                                   (unsigned int)buf, this_xfer, 11 - maxtry);
 364                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 365                                               this_xfer, &partial,
 366                                               USB_CNTL_TIMEOUT * 5);
 367                         USB_STOR_PRINTF("bulk_msg returned %d xferred %d/%d\n",
 368                                   result, partial, this_xfer);
 369                         if (us->pusb_dev->status != 0) {
 370                                 /* if we stall, we need to clear it before
 371                                  * we go on
 372                                  */
 373 #ifdef USB_STOR_DEBUG
 374                                 display_int_status(us->pusb_dev->status);
 375 #endif
 376                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 377                                         USB_STOR_PRINTF("stalled ->clearing endpoint halt for pipe 0x%x\n", pipe);
 378                                         stat = us->pusb_dev->status;
 379                                         usb_clear_halt(us->pusb_dev, pipe);
 380                                         us->pusb_dev->status = stat;
 381                                         if (this_xfer == partial) {
 382                                                 USB_STOR_PRINTF("bulk transferred with error %lX, but data ok\n", us->pusb_dev->status);
 383                                                 return 0;
 384                                         }
 385                                         else
 386                                                 return result;
 387                                 }
 388                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 389                                         USB_STOR_PRINTF("Device NAKed bulk_msg\n");
 390                                         return result;
 391                                 }
 392                                 USB_STOR_PRINTF("bulk transferred with error");
 393                                 if (this_xfer == partial) {
 394                                         USB_STOR_PRINTF(" %ld, but data ok\n",
 395                                                         us->pusb_dev->status);
 396                                         return 0;
 397                                 }
 398                                 /* if our try counter reaches 0, bail out */
 399                                         USB_STOR_PRINTF(" %ld, data %d\n",
 400                                                 us->pusb_dev->status, partial);
 401                                 if (!maxtry--)
 402                                                 return result;
 403                         }
 404                         /* update to show what data was transferred */
 405                         this_xfer -= partial;
 406                         buf += partial;
 407                         /* continue until this transfer is done */
 408                 } while (this_xfer);
 409         }
 410
 411         /* if we get here, we're done and successful */
 412         return 0;
 413 }
 414
 415 static int usb_stor_BBB_reset(struct us_data *us)
 416 {
 417         int result;
 418         unsigned int pipe;
 419
 420         /*
 421          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
 422          *
 423          * For Reset Recovery the host shall issue in the following order:
 424          * a) a Bulk-Only Mass Storage Reset
 425          * b) a Clear Feature HALT to the Bulk-In endpoint
 426          * c) a Clear Feature HALT to the Bulk-Out endpoint
 427          *
 428          * This is done in 3 steps.
 429          *
 430          * If the reset doesn't succeed, the device should be port reset.
 431          *
 432          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
 433          */
 434         USB_STOR_PRINTF("BBB_reset\n");
 435         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 436                                  US_BBB_RESET,
 437                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 438                                  0, us->ifnum, 0, 0, USB_CNTL_TIMEOUT * 5);
 439
 440         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 441                 USB_STOR_PRINTF("RESET:stall\n");
 442                 return -1;
 443         }
 444
 445         /* long wait for reset */
 446         mdelay(150);
 447         USB_STOR_PRINTF("BBB_reset result %d: status %lX reset\n", result,
 448                         us->pusb_dev->status);
 449         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 450         result = usb_clear_halt(us->pusb_dev, pipe);
 451         /* long wait for reset */
 452         mdelay(150);
 453         USB_STOR_PRINTF("BBB_reset result %d: status %lX clearing IN endpoint\n",
 454                         result, us->pusb_dev->status);
 455         /* long wait for reset */
 456         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 457         result = usb_clear_halt(us->pusb_dev, pipe);
 458         mdelay(150);
 459         USB_STOR_PRINTF("BBB_reset result %d: status %lX"
 460                         " clearing OUT endpoint\n", result,
 461                         us->pusb_dev->status);
 462         USB_STOR_PRINTF("BBB_reset done\n");
 463         return 0;
 464 }
 465
 466 /* FIXME: this reset function doesn't really reset the port, and it
 467  * should. Actually it should probably do what it's doing here, and
 468  * reset the port physically
 469  */
 470 static int usb_stor_CB_reset(struct us_data *us)
 471 {
 472         unsigned char cmd[12];
 473         int result;
 474
 475         USB_STOR_PRINTF("CB_reset\n");
 476         memset(cmd, 0xff, sizeof(cmd));
 477         cmd[0] = SCSI_SEND_DIAG;
 478         cmd[1] = 4;
 479         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 480                                  US_CBI_ADSC,
 481                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 482                                  0, us->ifnum, cmd, sizeof(cmd),
 483                                  USB_CNTL_TIMEOUT * 5);
 484
 485         /* long wait for reset */
 486         mdelay(1500);
 487         USB_STOR_PRINTF("CB_reset result %d: status %lX"
 488                         " clearing endpoint halt\n", result,
 489                         us->pusb_dev->status);
 490         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 491         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 492
 493         USB_STOR_PRINTF("CB_reset done\n");
 494         return 0;
 495 }
 496
 497 /*
 498  * Set up the command for a BBB device. Note that the actual SCSI
 499  * command is copied into cbw.CBWCDB.
 500  */
 501 int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
 502 {
 503         int result;
 504         int actlen;
 505         int dir_in;
 506         unsigned int pipe;
 507         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw, 1);
 508
 509         dir_in = US_DIRECTION(srb->cmd[0]);
 510
 511 #ifdef BBB_COMDAT_TRACE
 512         printf("dir %d lun %d cmdlen %d cmd %p datalen %d pdata %p\n",
 513                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
 514                 srb->pdata);
 515         if (srb->cmdlen) {
 516                 for (result = 0; result < srb->cmdlen; result++)
 517                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
 518                 printf("\n");
 519         }
 520 #endif
 521         /* sanity checks */
 522         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
 523                 USB_STOR_PRINTF("usb_stor_BBB_comdat:cmdlen too large\n");
 524                 return -1;
 525         }
 526
 527         /* always OUT to the ep */
 528         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 529
 530         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
 531         cbw->dCBWTag = cpu_to_le32(CBWTag++);
 532         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
 533         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
 534         cbw->bCBWLUN = srb->lun;
 535         cbw->bCDBLength = srb->cmdlen;
 536         /* copy the command data into the CBW command data buffer */
 537         /* DST SRC LEN!!! */
 538         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
 539         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
 540                               &actlen, USB_CNTL_TIMEOUT * 5);
 541         if (result < 0)
 542                 USB_STOR_PRINTF("usb_stor_BBB_comdat:usb_bulk_msg error\n");
 543         return result;
 544 }
 545
 546 /* FIXME: we also need a CBI_command which sets up the completion
 547  * interrupt, and waits for it
 548  */
 549 int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 550 {
 551         int result = 0;
 552         int dir_in, retry;
 553         unsigned int pipe;
 554         unsigned long status;
 555
 556         retry = 5;
 557         dir_in = US_DIRECTION(srb->cmd[0]);
 558
 559         if (dir_in)
 560                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 561         else
 562                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 563
 564         while (retry--) {
 565                 USB_STOR_PRINTF("CBI gets a command: Try %d\n", 5 - retry);
 566 #ifdef USB_STOR_DEBUG
 567                 usb_show_srb(srb);
 568 #endif
 569                 /* let's send the command via the control pipe */
 570                 result = usb_control_msg(us->pusb_dev,
 571                                          usb_sndctrlpipe(us->pusb_dev , 0),
 572                                          US_CBI_ADSC,
 573                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 574                                          0, us->ifnum,
 575                                          srb->cmd, srb->cmdlen,
 576                                          USB_CNTL_TIMEOUT * 5);
 577                 USB_STOR_PRINTF("CB_transport: control msg returned %d,"
 578                                 " status %lX\n", result, us->pusb_dev->status);
 579                 /* check the return code for the command */
 580                 if (result < 0) {
 581                         if (us->pusb_dev->status & USB_ST_STALLED) {
 582                                 status = us->pusb_dev->status;
 583                                 USB_STOR_PRINTF(" stall during command found,"
 584                                                 " clear pipe\n");
 585                                 usb_clear_halt(us->pusb_dev,
 586                                               usb_sndctrlpipe(us->pusb_dev, 0));
 587                                 us->pusb_dev->status = status;
 588                         }
 589                         USB_STOR_PRINTF(" error during command %02X"
 590                                         " Stat = %lX\n", srb->cmd[0],
 591                                         us->pusb_dev->status);
 592                         return result;
 593                 }
 594                 /* transfer the data payload for this command, if one exists*/
 595
 596                 USB_STOR_PRINTF("CB_transport: control msg returned %d,"
 597                                 " direction is %s to go 0x%lx\n", result,
 598                                 dir_in ? "IN" : "OUT", srb->datalen);
 599                 if (srb->datalen) {
 600                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
 601                                                  srb->datalen);
 602                         USB_STOR_PRINTF("CBI attempted to transfer data,"
 603                                         " result is %d status %lX, len %d\n",
 604                                         result, us->pusb_dev->status,
 605                                         us->pusb_dev->act_len);
 606                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
 607                                 break;
 608                 } /* if (srb->datalen) */
 609                 else
 610                         break;
 611         }
 612         /* return result */
 613
 614         return result;
 615 }
 616
 617
 618 int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 619 {
 620         int timeout;
 621
 622         us->ip_wanted = 1;
 623         submit_int_msg(us->pusb_dev, us->irqpipe,
 624                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
 625         timeout = 1000;
 626         while (timeout--) {
 627                 if ((volatile int *) us->ip_wanted == 0)
 628                         break;
 629                 mdelay(10);
 630         }
 631         if (us->ip_wanted) {
 632                 printf("        Did not get interrupt on CBI\n");
 633                 us->ip_wanted = 0;
 634                 return USB_STOR_TRANSPORT_ERROR;
 635         }
 636         USB_STOR_PRINTF
 637                 ("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
 638                  us->ip_data, us->pusb_dev->irq_act_len,
 639                  us->pusb_dev->irq_status);
 640         /* UFI gives us ASC and ASCQ, like a request sense */
 641         if (us->subclass == US_SC_UFI) {
 642                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 643                     srb->cmd[0] == SCSI_INQUIRY)
 644                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 645                 else if (us->ip_data)
 646                         return USB_STOR_TRANSPORT_FAILED;
 647                 else
 648                         return USB_STOR_TRANSPORT_GOOD;
 649         }
 650         /* otherwise, we interpret the data normally */
 651         switch (us->ip_data) {
 652         case 0x0001:
 653                 return USB_STOR_TRANSPORT_GOOD;
 654         case 0x0002:
 655                 return USB_STOR_TRANSPORT_FAILED;
 656         default:
 657                 return USB_STOR_TRANSPORT_ERROR;
 658         }                       /* switch */
 659         return USB_STOR_TRANSPORT_ERROR;
 660 }
 661
 662 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 663 #define USB_TRANSPORT_NOT_READY_RETRY 10
 664
 665 /* clear a stall on an endpoint - special for BBB devices */
 666 int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 667 {
 668         int result;
 669
 670         /* ENDPOINT_HALT = 0, so set value to 0 */
 671         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
 672                                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
 673                                 0, endpt, 0, 0, USB_CNTL_TIMEOUT * 5);
 674         return result;
 675 }
 676
 677 int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
 678 {
 679         int result, retry;
 680         int dir_in;
 681         int actlen, data_actlen;
 682         unsigned int pipe, pipein, pipeout;
 683         ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_csw_t, csw, 1);
 684 #ifdef BBB_XPORT_TRACE
 685         unsigned char *ptr;
 686         int index;
 687 #endif
 688
 689         dir_in = US_DIRECTION(srb->cmd[0]);
 690
 691         /* COMMAND phase */
 692         USB_STOR_PRINTF("COMMAND phase\n");
 693         result = usb_stor_BBB_comdat(srb, us);
 694         if (result < 0) {
 695                 USB_STOR_PRINTF("failed to send CBW status %ld\n",
 696                         us->pusb_dev->status);
 697                 usb_stor_BBB_reset(us);
 698                 return USB_STOR_TRANSPORT_FAILED;
 699         }
 700         mdelay(5);
 701         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 702         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 703         /* DATA phase + error handling */
 704         data_actlen = 0;
 705         /* no data, go immediately to the STATUS phase */
 706         if (srb->datalen == 0)
 707                 goto st;
 708         USB_STOR_PRINTF("DATA phase\n");
 709         if (dir_in)
 710                 pipe = pipein;
 711         else
 712                 pipe = pipeout;
 713         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
 714                               &data_actlen, USB_CNTL_TIMEOUT * 5);
 715         /* special handling of STALL in DATA phase */
 716         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
 717                 USB_STOR_PRINTF("DATA:stall\n");
 718                 /* clear the STALL on the endpoint */
 719                 result = usb_stor_BBB_clear_endpt_stall(us,
 720                                         dir_in ? us->ep_in : us->ep_out);
 721                 if (result >= 0)
 722                         /* continue on to STATUS phase */
 723                         goto st;
 724         }
 725         if (result < 0) {
 726                 USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
 727                         us->pusb_dev->status);
 728                 usb_stor_BBB_reset(us);
 729                 return USB_STOR_TRANSPORT_FAILED;
 730         }
 731 #ifdef BBB_XPORT_TRACE
 732         for (index = 0; index < data_actlen; index++)
 733                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
 734         printf("\n");
 735 #endif
 736         /* STATUS phase + error handling */
 737 st:
 738         retry = 0;
 739 again:
 740         USB_STOR_PRINTF("STATUS phase\n");
 741         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
 742                                 &actlen, USB_CNTL_TIMEOUT*5);
 743
 744         /* special handling of STALL in STATUS phase */
 745         if ((result < 0) && (retry < 1) &&
 746             (us->pusb_dev->status & USB_ST_STALLED)) {
 747                 USB_STOR_PRINTF("STATUS:stall\n");
 748                 /* clear the STALL on the endpoint */
 749                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
 750                 if (result >= 0 && (retry++ < 1))
 751                         /* do a retry */
 752                         goto again;
 753         }
 754         if (result < 0) {
 755                 USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
 756                         us->pusb_dev->status);
 757                 usb_stor_BBB_reset(us);
 758                 return USB_STOR_TRANSPORT_FAILED;
 759         }
 760 #ifdef BBB_XPORT_TRACE
 761         ptr = (unsigned char *)csw;
 762         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
 763                 printf("ptr[%d] %#x ", index, ptr[index]);
 764         printf("\n");
 765 #endif
 766         /* misuse pipe to get the residue */
 767         pipe = le32_to_cpu(csw->dCSWDataResidue);
 768         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
 769                 pipe = srb->datalen - data_actlen;
 770         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
 771                 USB_STOR_PRINTF("!CSWSIGNATURE\n");
 772                 usb_stor_BBB_reset(us);
 773                 return USB_STOR_TRANSPORT_FAILED;
 774         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
 775                 USB_STOR_PRINTF("!Tag\n");
 776                 usb_stor_BBB_reset(us);
 777                 return USB_STOR_TRANSPORT_FAILED;
 778         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
 779                 USB_STOR_PRINTF(">PHASE\n");
 780                 usb_stor_BBB_reset(us);
 781                 return USB_STOR_TRANSPORT_FAILED;
 782         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
 783                 USB_STOR_PRINTF("=PHASE\n");
 784                 usb_stor_BBB_reset(us);
 785                 return USB_STOR_TRANSPORT_FAILED;
 786         } else if (data_actlen > srb->datalen) {
 787                 USB_STOR_PRINTF("transferred %dB instead of %ldB\n",
 788                         data_actlen, srb->datalen);
 789                 return USB_STOR_TRANSPORT_FAILED;
 790         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
 791                 USB_STOR_PRINTF("FAILED\n");
 792                 return USB_STOR_TRANSPORT_FAILED;
 793         }
 794
 795         return result;
 796 }
 797
 798 int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 799 {
 800         int result, status;
 801         ccb *psrb;
 802         ccb reqsrb;
 803         int retry, notready;
 804
 805         psrb = &reqsrb;
 806         status = USB_STOR_TRANSPORT_GOOD;
 807         retry = 0;
 808         notready = 0;
 809         /* issue the command */
 810 do_retry:
 811         result = usb_stor_CB_comdat(srb, us);
 812         USB_STOR_PRINTF("command / Data returned %d, status %lX\n",
 813                         result, us->pusb_dev->status);
 814         /* if this is an CBI Protocol, get IRQ */
 815         if (us->protocol == US_PR_CBI) {
 816                 status = usb_stor_CBI_get_status(srb, us);
 817                 /* if the status is error, report it */
 818                 if (status == USB_STOR_TRANSPORT_ERROR) {
 819                         USB_STOR_PRINTF(" USB CBI Command Error\n");
 820                         return status;
 821                 }
 822                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
 823                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
 824                 if (!us->ip_data) {
 825                         /* if the status is good, report it */
 826                         if (status == USB_STOR_TRANSPORT_GOOD) {
 827                                 USB_STOR_PRINTF(" USB CBI Command Good\n");
 828                                 return status;
 829                         }
 830                 }
 831         }
 832         /* do we have to issue an auto request? */
 833         /* HERE we have to check the result */
 834         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 835                 USB_STOR_PRINTF("ERROR %lX\n", us->pusb_dev->status);
 836                 us->transport_reset(us);
 837                 return USB_STOR_TRANSPORT_ERROR;
 838         }
 839         if ((us->protocol == US_PR_CBI) &&
 840             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
 841             (srb->cmd[0] == SCSI_INQUIRY))) {
 842                 /* do not issue an autorequest after request sense */
 843                 USB_STOR_PRINTF("No auto request and good\n");
 844                 return USB_STOR_TRANSPORT_GOOD;
 845         }
 846         /* issue an request_sense */
 847         memset(&psrb->cmd[0], 0, 12);
 848         psrb->cmd[0] = SCSI_REQ_SENSE;
 849         psrb->cmd[1] = srb->lun << 5;
 850         psrb->cmd[4] = 18;
 851         psrb->datalen = 18;
 852         psrb->pdata = &srb->sense_buf[0];
 853         psrb->cmdlen = 12;
 854         /* issue the command */
 855         result = usb_stor_CB_comdat(psrb, us);
 856         USB_STOR_PRINTF("auto request returned %d\n", result);
 857         /* if this is an CBI Protocol, get IRQ */
 858         if (us->protocol == US_PR_CBI)
 859                 status = usb_stor_CBI_get_status(psrb, us);
 860
 861         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 862                 USB_STOR_PRINTF(" AUTO REQUEST ERROR %ld\n",
 863                                 us->pusb_dev->status);
 864                 return USB_STOR_TRANSPORT_ERROR;
 865         }
 866         USB_STOR_PRINTF("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 867                         srb->sense_buf[0], srb->sense_buf[2],
 868                         srb->sense_buf[12], srb->sense_buf[13]);
 869         /* Check the auto request result */
 870         if ((srb->sense_buf[2] == 0) &&
 871             (srb->sense_buf[12] == 0) &&
 872             (srb->sense_buf[13] == 0)) {
 873                 /* ok, no sense */
 874                 return USB_STOR_TRANSPORT_GOOD;
 875         }
 876
 877         /* Check the auto request result */
 878         switch (srb->sense_buf[2]) {
 879         case 0x01:
 880                 /* Recovered Error */
 881                 return USB_STOR_TRANSPORT_GOOD;
 882                 break;
 883         case 0x02:
 884                 /* Not Ready */
 885                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 886                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 887                                " 0x%02X (NOT READY)\n", srb->cmd[0],
 888                                 srb->sense_buf[0], srb->sense_buf[2],
 889                                 srb->sense_buf[12], srb->sense_buf[13]);
 890                         return USB_STOR_TRANSPORT_FAILED;
 891                 } else {
 892                         mdelay(100);
 893                         goto do_retry;
 894                 }
 895                 break;
 896         default:
 897                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 898                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
 899                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
 900                                 srb->sense_buf[2], srb->sense_buf[12],
 901                                 srb->sense_buf[13]);
 902                         return USB_STOR_TRANSPORT_FAILED;
 903                 } else
 904                         goto do_retry;
 905                 break;
 906         }
 907         return USB_STOR_TRANSPORT_FAILED;
 908 }
 909
 910
 911 static int usb_inquiry(ccb *srb, struct us_data *ss)
 912 {
 913         int retry, i;
 914         retry = 5;
 915         do {
 916                 memset(&srb->cmd[0], 0, 12);
 917                 srb->cmd[0] = SCSI_INQUIRY;
 918                 srb->cmd[1] = srb->lun << 5;
 919                 srb->cmd[4] = 36;
 920                 srb->datalen = 36;
 921                 srb->cmdlen = 12;
 922                 i = ss->transport(srb, ss);
 923                 USB_STOR_PRINTF("inquiry returns %d\n", i);
 924                 if (i == 0)
 925                         break;
 926         } while (--retry);
 927
 928         if (!retry) {
 929                 printf("error in inquiry\n");
 930                 return -1;
 931         }
 932         return 0;
 933 }
 934
 935 static int usb_request_sense(ccb *srb, struct us_data *ss)
 936 {
 937         char *ptr;
 938
 939         ptr = (char *)srb->pdata;
 940         memset(&srb->cmd[0], 0, 12);
 941         srb->cmd[0] = SCSI_REQ_SENSE;
 942         srb->cmd[1] = srb->lun << 5;
 943         srb->cmd[4] = 18;
 944         srb->datalen = 18;
 945         srb->pdata = &srb->sense_buf[0];
 946         srb->cmdlen = 12;
 947         ss->transport(srb, ss);
 948         USB_STOR_PRINTF("Request Sense returned %02X %02X %02X\n",
 949                         srb->sense_buf[2], srb->sense_buf[12],
 950                         srb->sense_buf[13]);
 951         srb->pdata = (uchar *)ptr;
 952         return 0;
 953 }
 954
 955 static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
 956 {
 957         int retries = 10;
 958
 959         do {
 960                 memset(&srb->cmd[0], 0, 12);
 961                 srb->cmd[0] = SCSI_TST_U_RDY;
 962                 srb->cmd[1] = srb->lun << 5;
 963                 srb->datalen = 0;
 964                 srb->cmdlen = 12;
 965                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 966                         return 0;
 967                 usb_request_sense(srb, ss);
 968                 mdelay(100);
 969         } while (retries--);
 970
 971         return -1;
 972 }
 973
 974 static int usb_read_capacity(ccb *srb, struct us_data *ss)
 975 {
 976         int retry;
 977         /* XXX retries */
 978         retry = 3;
 979         do {
 980                 memset(&srb->cmd[0], 0, 12);
 981                 srb->cmd[0] = SCSI_RD_CAPAC;
 982                 srb->cmd[1] = srb->lun << 5;
 983                 srb->datalen = 8;
 984                 srb->cmdlen = 12;
 985                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
 986                         return 0;
 987         } while (retry--);
 988
 989         return -1;
 990 }
 991
 992 static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
 993                        unsigned short blocks)
 994 {
 995         memset(&srb->cmd[0], 0, 12);
 996         srb->cmd[0] = SCSI_READ10;
 997         srb->cmd[1] = srb->lun << 5;
 998         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
 999         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1000         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1001         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1002         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1003         srb->cmd[8] = (unsigned char) blocks & 0xff;
1004         srb->cmdlen = 12;
1005         USB_STOR_PRINTF("read10: start %lx blocks %x\n", start, blocks);
1006         return ss->transport(srb, ss);
1007 }
1008
1009 static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
1010                         unsigned short blocks)
1011 {
1012         memset(&srb->cmd[0], 0, 12);
1013         srb->cmd[0] = SCSI_WRITE10;
1014         srb->cmd[1] = srb->lun << 5;
1015         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1016         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1017         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1018         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1019         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1020         srb->cmd[8] = (unsigned char) blocks & 0xff;
1021         srb->cmdlen = 12;
1022         USB_STOR_PRINTF("write10: start %lx blocks %x\n", start, blocks);
1023         return ss->transport(srb, ss);
1024 }
1025
1026
1027 #ifdef CONFIG_USB_BIN_FIXUP
1028 /*
1029  * Some USB storage devices queried for SCSI identification data respond with
1030  * binary strings, which if output to the console freeze the terminal. The
1031  * workaround is to modify the vendor and product strings read from such
1032  * device with proper values (as reported by 'usb info').
1033  *
1034  * Vendor and product length limits are taken from the definition of
1035  * block_dev_desc_t in include/part.h.
1036  */
1037 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1038                                 unsigned char vendor[],
1039                                 unsigned char product[]) {
1040         const unsigned char max_vendor_len = 40;
1041         const unsigned char max_product_len = 20;
1042         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1043                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1044                 strncpy((char *)product, "Flash Media Cntrller",
1045                         max_product_len);
1046         }
1047 }
1048 #endif /* CONFIG_USB_BIN_FIXUP */
1049
1050 unsigned long usb_stor_read(int device, unsigned long blknr,
1051                             unsigned long blkcnt, void *buffer)
1052 {
1053         unsigned long start, blks, buf_addr, max_xfer_blk;
1054         unsigned short smallblks;
1055         struct usb_device *dev;
1056         struct us_data *ss;
1057         int retry, i;
1058         ccb *srb = &usb_ccb;
1059
1060         if (blkcnt == 0)
1061                 return 0;
1062
1063         device &= 0xff;
1064         /* Setup  device */
1065         USB_STOR_PRINTF("\nusb_read: dev %d \n", device);
1066         dev = NULL;
1067         for (i = 0; i < USB_MAX_DEVICE; i++) {
1068                 dev = usb_get_dev_index(i);
1069                 if (dev == NULL)
1070                         return 0;
1071                 if (dev->devnum == usb_dev_desc[device].target)
1072                         break;
1073         }
1074         ss = (struct us_data *)dev->privptr;
1075
1076         usb_disable_asynch(1); /* asynch transfer not allowed */
1077         srb->lun = usb_dev_desc[device].lun;
1078         buf_addr = (unsigned long)buffer;
1079         start = blknr;
1080         blks = blkcnt;
1081         if (usb_test_unit_ready(srb, ss)) {
1082                 printf("Device NOT ready\n   Request Sense returned %02X %02X"
1083                        " %02X\n", srb->sense_buf[2], srb->sense_buf[12],
1084                        srb->sense_buf[13]);
1085                 return 0;
1086         }
1087
1088         USB_STOR_PRINTF("\nusb_read: dev %d startblk %lx, blccnt %lx"
1089                         " buffer %lx\n", device, start, blks, buf_addr);
1090
1091         do {
1092                 /* XXX need some comment here */
1093                 retry = 2;
1094                 srb->pdata = (unsigned char *)buf_addr;
1095                 max_xfer_blk = USB_MAX_XFER_BLK(buf_addr,
1096                                                 usb_dev_desc[device].blksz);
1097                 if (blks > max_xfer_blk)
1098                         smallblks = (unsigned short) max_xfer_blk;
1099                 else
1100                         smallblks = (unsigned short) blks;
1101 retry_it:
1102                 if (smallblks == max_xfer_blk)
1103                         usb_show_progress();
1104                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1105                 srb->pdata = (unsigned char *)buf_addr;
1106                 if (usb_read_10(srb, ss, start, smallblks)) {
1107                         USB_STOR_PRINTF("Read ERROR\n");
1108                         usb_request_sense(srb, ss);
1109                         if (retry--)
1110                                 goto retry_it;
1111                         blkcnt -= blks;
1112                         break;
1113                 }
1114                 start += smallblks;
1115                 blks -= smallblks;
1116                 buf_addr += srb->datalen;
1117         } while (blks != 0);
1118
1119         USB_STOR_PRINTF("usb_read: end startblk %lx, blccnt %x buffer %lx\n",
1120                         start, smallblks, buf_addr);
1121
1122         usb_disable_asynch(0); /* asynch transfer allowed */
1123         if (blkcnt >= max_xfer_blk)
1124                 debug("\n");
1125         return blkcnt;
1126 }
1127
1128 unsigned long usb_stor_write(int device, unsigned long blknr,
1129                                 unsigned long blkcnt, const void *buffer)
1130 {
1131         unsigned long start, blks, buf_addr, max_xfer_blk;
1132         unsigned short smallblks;
1133         struct usb_device *dev;
1134         struct us_data *ss;
1135         int retry, i;
1136         ccb *srb = &usb_ccb;
1137
1138         if (blkcnt == 0)
1139                 return 0;
1140
1141         device &= 0xff;
1142         /* Setup  device */
1143         USB_STOR_PRINTF("\nusb_write: dev %d \n", device);
1144         dev = NULL;
1145         for (i = 0; i < USB_MAX_DEVICE; i++) {
1146                 dev = usb_get_dev_index(i);
1147                 if (dev == NULL)
1148                         return 0;
1149                 if (dev->devnum == usb_dev_desc[device].target)
1150                         break;
1151         }
1152         ss = (struct us_data *)dev->privptr;
1153
1154         usb_disable_asynch(1); /* asynch transfer not allowed */
1155
1156         srb->lun = usb_dev_desc[device].lun;
1157         buf_addr = (unsigned long)buffer;
1158         start = blknr;
1159         blks = blkcnt;
1160         if (usb_test_unit_ready(srb, ss)) {
1161                 printf("Device NOT ready\n   Request Sense returned %02X %02X"
1162                        " %02X\n", srb->sense_buf[2], srb->sense_buf[12],
1163                         srb->sense_buf[13]);
1164                 return 0;
1165         }
1166
1167         USB_STOR_PRINTF("\nusb_write: dev %d startblk %lx, blccnt %lx"
1168                         " buffer %lx\n", device, start, blks, buf_addr);
1169
1170         do {
1171                 /* If write fails retry for max retry count else
1172                  * return with number of blocks written successfully.
1173                  */
1174                 retry = 2;
1175                 srb->pdata = (unsigned char *)buf_addr;
1176                 max_xfer_blk = USB_MAX_XFER_BLK(buf_addr,
1177                                                 usb_dev_desc[device].blksz);
1178                 if (blks > max_xfer_blk)
1179                         smallblks = (unsigned short) max_xfer_blk;
1180                 else
1181                         smallblks = (unsigned short) blks;
1182 retry_it:
1183                 if (smallblks == max_xfer_blk)
1184                         usb_show_progress();
1185                 srb->datalen = usb_dev_desc[device].blksz * smallblks;
1186                 srb->pdata = (unsigned char *)buf_addr;
1187                 if (usb_write_10(srb, ss, start, smallblks)) {
1188                         USB_STOR_PRINTF("Write ERROR\n");
1189                         usb_request_sense(srb, ss);
1190                         if (retry--)
1191                                 goto retry_it;
1192                         blkcnt -= blks;
1193                         break;
1194                 }
1195                 start += smallblks;
1196                 blks -= smallblks;
1197                 buf_addr += srb->datalen;
1198         } while (blks != 0);
1199
1200         USB_STOR_PRINTF("usb_write: end startblk %lx, blccnt %x buffer %lx\n",
1201                         start, smallblks, buf_addr);
1202
1203         usb_disable_asynch(0); /* asynch transfer allowed */
1204         if (blkcnt >= max_xfer_blk)
1205                 debug("\n");
1206         return blkcnt;
1207
1208 }
1209
1210 /* Probe to see if a new device is actually a Storage device */
1211 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1212                       struct us_data *ss)
1213 {
1214         struct usb_interface *iface;
1215         int i;
1216         unsigned int flags = 0;
1217
1218         int protocol = 0;
1219         int subclass = 0;
1220
1221         /* let's examine the device now */
1222         iface = &dev->config.if_desc[ifnum];
1223
1224 #if 0
1225         /* this is the place to patch some storage devices */
1226         USB_STOR_PRINTF("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
1227                         dev->descriptor.idProduct);
1228
1229         if ((dev->descriptor.idVendor) == 0x066b &&
1230             (dev->descriptor.idProduct) == 0x0103) {
1231                 USB_STOR_PRINTF("patched for E-USB\n");
1232                 protocol = US_PR_CB;
1233                 subclass = US_SC_UFI;       /* an assumption */
1234         }
1235 #endif
1236
1237         if (dev->descriptor.bDeviceClass != 0 ||
1238                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1239                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1240                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1241                 /* if it's not a mass storage, we go no further */
1242                 return 0;
1243         }
1244
1245         memset(ss, 0, sizeof(struct us_data));
1246
1247         /* At this point, we know we've got a live one */
1248         USB_STOR_PRINTF("\n\nUSB Mass Storage device detected\n");
1249
1250         /* Initialize the us_data structure with some useful info */
1251         ss->flags = flags;
1252         ss->ifnum = ifnum;
1253         ss->pusb_dev = dev;
1254         ss->attention_done = 0;
1255
1256         /* If the device has subclass and protocol, then use that.  Otherwise,
1257          * take data from the specific interface.
1258          */
1259         if (subclass) {
1260                 ss->subclass = subclass;
1261                 ss->protocol = protocol;
1262         } else {
1263                 ss->subclass = iface->desc.bInterfaceSubClass;
1264                 ss->protocol = iface->desc.bInterfaceProtocol;
1265         }
1266
1267         /* set the handler pointers based on the protocol */
1268         USB_STOR_PRINTF("Transport: ");
1269         switch (ss->protocol) {
1270         case US_PR_CB:
1271                 USB_STOR_PRINTF("Control/Bulk\n");
1272                 ss->transport = usb_stor_CB_transport;
1273                 ss->transport_reset = usb_stor_CB_reset;
1274                 break;
1275
1276         case US_PR_CBI:
1277                 USB_STOR_PRINTF("Control/Bulk/Interrupt\n");
1278                 ss->transport = usb_stor_CB_transport;
1279                 ss->transport_reset = usb_stor_CB_reset;
1280                 break;
1281         case US_PR_BULK:
1282                 USB_STOR_PRINTF("Bulk/Bulk/Bulk\n");
1283                 ss->transport = usb_stor_BBB_transport;
1284                 ss->transport_reset = usb_stor_BBB_reset;
1285                 break;
1286         default:
1287                 printf("USB Storage Transport unknown / not yet implemented\n");
1288                 return 0;
1289                 break;
1290         }
1291
1292         /*
1293          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1294          * An optional interrupt is OK (necessary for CBI protocol).
1295          * We will ignore any others.
1296          */
1297         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1298                 /* is it an BULK endpoint? */
1299                 if ((iface->ep_desc[i].bmAttributes &
1300                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1301                         if (iface->ep_desc[i].bEndpointAddress & USB_DIR_IN)
1302                                 ss->ep_in = iface->ep_desc[i].bEndpointAddress &
1303                                         USB_ENDPOINT_NUMBER_MASK;
1304                         else
1305                                 ss->ep_out =
1306                                         iface->ep_desc[i].bEndpointAddress &
1307                                         USB_ENDPOINT_NUMBER_MASK;
1308                 }
1309
1310                 /* is it an interrupt endpoint? */
1311                 if ((iface->ep_desc[i].bmAttributes &
1312                     USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1313                         ss->ep_int = iface->ep_desc[i].bEndpointAddress &
1314                                 USB_ENDPOINT_NUMBER_MASK;
1315                         ss->irqinterval = iface->ep_desc[i].bInterval;
1316                 }
1317         }
1318         USB_STOR_PRINTF("Endpoints In %d Out %d Int %d\n",
1319                   ss->ep_in, ss->ep_out, ss->ep_int);
1320
1321         /* Do some basic sanity checks, and bail if we find a problem */
1322         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1323             !ss->ep_in || !ss->ep_out ||
1324             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1325                 USB_STOR_PRINTF("Problems with device\n");
1326                 return 0;
1327         }
1328         /* set class specific stuff */
1329         /* We only handle certain protocols.  Currently, these are
1330          * the only ones.
1331          * The SFF8070 accepts the requests used in u-boot
1332          */
1333         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1334             ss->subclass != US_SC_8070) {
1335                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1336                 return 0;
1337         }
1338         if (ss->ep_int) {
1339                 /* we had found an interrupt endpoint, prepare irq pipe
1340                  * set up the IRQ pipe and handler
1341                  */
1342                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1343                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1344                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1345                 dev->irq_handle = usb_stor_irq;
1346         }
1347         dev->privptr = (void *)ss;
1348         return 1;
1349 }
1350
1351 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1352                       block_dev_desc_t *dev_desc)
1353 {
1354         unsigned char perq, modi;
1355         ALLOC_CACHE_ALIGN_BUFFER(unsigned long, cap, 2);
1356         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, usb_stor_buf, 36);
1357         unsigned long *capacity, *blksz;
1358         ccb *pccb = &usb_ccb;
1359
1360         pccb->pdata = usb_stor_buf;
1361
1362         dev_desc->target = dev->devnum;
1363         pccb->lun = dev_desc->lun;
1364         USB_STOR_PRINTF(" address %d\n", dev_desc->target);
1365
1366         if (usb_inquiry(pccb, ss))
1367                 return -1;
1368
1369         perq = usb_stor_buf[0];
1370         modi = usb_stor_buf[1];
1371
1372         if ((perq & 0x1f) == 0x1f) {
1373                 /* skip unknown devices */
1374                 return 0;
1375         }
1376         if ((modi&0x80) == 0x80) {
1377                 /* drive is removable */
1378                 dev_desc->removable = 1;
1379         }
1380         memcpy(&dev_desc->vendor[0], (const void *) &usb_stor_buf[8], 8);
1381         memcpy(&dev_desc->product[0], (const void *) &usb_stor_buf[16], 16);
1382         memcpy(&dev_desc->revision[0], (const void *) &usb_stor_buf[32], 4);
1383         dev_desc->vendor[8] = 0;
1384         dev_desc->product[16] = 0;
1385         dev_desc->revision[4] = 0;
1386 #ifdef CONFIG_USB_BIN_FIXUP
1387         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1388                       (uchar *)dev_desc->product);
1389 #endif /* CONFIG_USB_BIN_FIXUP */
1390         USB_STOR_PRINTF("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1391                         usb_stor_buf[3]);
1392         if (usb_test_unit_ready(pccb, ss)) {
1393                 printf("Device NOT ready\n"
1394                        "   Request Sense returned %02X %02X %02X\n",
1395                        pccb->sense_buf[2], pccb->sense_buf[12],
1396                        pccb->sense_buf[13]);
1397                 if (dev_desc->removable == 1) {
1398                         dev_desc->type = perq;
1399                         return 1;
1400                 }
1401                 return 0;
1402         }
1403         pccb->pdata = (unsigned char *)&cap[0];
1404         memset(pccb->pdata, 0, 8);
1405         if (usb_read_capacity(pccb, ss) != 0) {
1406                 printf("READ_CAP ERROR\n");
1407                 cap[0] = 2880;
1408                 cap[1] = 0x200;
1409         }
1410         USB_STOR_PRINTF("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0],
1411                         cap[1]);
1412 #if 0
1413         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1414                 cap[0] >>= 16;
1415 #endif
1416         cap[0] = cpu_to_be32(cap[0]);
1417         cap[1] = cpu_to_be32(cap[1]);
1418
1419         /* this assumes bigendian! */
1420         cap[0] += 1;
1421         capacity = &cap[0];
1422         blksz = &cap[1];
1423         USB_STOR_PRINTF("Capacity = 0x%lx, blocksz = 0x%lx\n",
1424                         *capacity, *blksz);
1425         dev_desc->lba = *capacity;
1426         dev_desc->blksz = *blksz;
1427         dev_desc->type = perq;
1428         USB_STOR_PRINTF(" address %d\n", dev_desc->target);
1429         USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type);
1430
1431         init_part(dev_desc);
1432
1433         USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type);
1434         return 1;
1435 }