kernel/drivers/usb/storage/shuttle_usbat.c

   1 /* Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable
   2  *
   3  * Current development and maintenance by:
   4  *   (c) 2000, 2001 Robert Baruch (autophile@starband.net)
   5  *   (c) 2004, 2005 Daniel Drake <dsd@gentoo.org>
   6  *
   7  * Developed with the assistance of:
   8  *   (c) 2002 Alan Stern <stern@rowland.org>
   9  *
  10  * Flash support based on earlier work by:
  11  *   (c) 2002 Thomas Kreiling <usbdev@sm04.de>
  12  *
  13  * Many originally ATAPI devices were slightly modified to meet the USB
  14  * market by using some kind of translation from ATAPI to USB on the host,
  15  * and the peripheral would translate from USB back to ATAPI.
  16  *
  17  * SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only,
  18  * which does the USB-to-ATAPI conversion.  By obtaining the data sheet on
  19  * their device under nondisclosure agreement, I have been able to write
  20  * this driver for Linux.
  21  *
  22  * The chip used in the device can also be used for EPP and ISA translation
  23  * as well. This driver is only guaranteed to work with the ATAPI
  24  * translation.
  25  *
  26  * See the Kconfig help text for a list of devices known to be supported by
  27  * this driver.
  28  *
  29  * This program is free software; you can redistribute it and/or modify it
  30  * under the terms of the GNU General Public License as published by the
  31  * Free Software Foundation; either version 2, or (at your option) any
  32  * later version.
  33  *
  34  * This program is distributed in the hope that it will be useful, but
  35  * WITHOUT ANY WARRANTY; without even the implied warranty of
  36  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  37  * General Public License for more details.
  38  *
  39  * You should have received a copy of the GNU General Public License along
  40  * with this program; if not, write to the Free Software Foundation, Inc.,
  41  * 675 Mass Ave, Cambridge, MA 02139, USA.
  42  */
  43
  44 #include <linux/errno.h>
  45 #include <linux/module.h>
  46 #include <linux/slab.h>
  47 #include <linux/cdrom.h>
  48
  49 #include <scsi/scsi.h>
  50 #include <scsi/scsi_cmnd.h>
  51
  52 #include "usb.h"
  53 #include "transport.h"
  54 #include "protocol.h"
  55 #include "debug.h"
  56
  57 MODULE_DESCRIPTION("Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable");
  58 MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>, Robert Baruch <autophile@starband.net>");
  59 MODULE_LICENSE("GPL");
  60
  61 /* Supported device types */
  62 #define USBAT_DEV_HP8200        0x01
  63 #define USBAT_DEV_FLASH         0x02
  64
  65 #define USBAT_EPP_PORT          0x10
  66 #define USBAT_EPP_REGISTER      0x30
  67 #define USBAT_ATA               0x40
  68 #define USBAT_ISA               0x50
  69
  70 /* Commands (need to be logically OR'd with an access type */
  71 #define USBAT_CMD_READ_REG              0x00
  72 #define USBAT_CMD_WRITE_REG             0x01
  73 #define USBAT_CMD_READ_BLOCK    0x02
  74 #define USBAT_CMD_WRITE_BLOCK   0x03
  75 #define USBAT_CMD_COND_READ_BLOCK       0x04
  76 #define USBAT_CMD_COND_WRITE_BLOCK      0x05
  77 #define USBAT_CMD_WRITE_REGS    0x07
  78
  79 /* Commands (these don't need an access type) */
  80 #define USBAT_CMD_EXEC_CMD      0x80
  81 #define USBAT_CMD_SET_FEAT      0x81
  82 #define USBAT_CMD_UIO           0x82
  83
  84 /* Methods of accessing UIO register */
  85 #define USBAT_UIO_READ  1
  86 #define USBAT_UIO_WRITE 0
  87
  88 /* Qualifier bits */
  89 #define USBAT_QUAL_FCQ  0x20    /* full compare */
  90 #define USBAT_QUAL_ALQ  0x10    /* auto load subcount */
  91
  92 /* USBAT Flash Media status types */
  93 #define USBAT_FLASH_MEDIA_NONE  0
  94 #define USBAT_FLASH_MEDIA_CF    1
  95
  96 /* USBAT Flash Media change types */
  97 #define USBAT_FLASH_MEDIA_SAME  0
  98 #define USBAT_FLASH_MEDIA_CHANGED       1
  99
 100 /* USBAT ATA registers */
 101 #define USBAT_ATA_DATA      0x10  /* read/write data (R/W) */
 102 #define USBAT_ATA_FEATURES  0x11  /* set features (W) */
 103 #define USBAT_ATA_ERROR     0x11  /* error (R) */
 104 #define USBAT_ATA_SECCNT    0x12  /* sector count (R/W) */
 105 #define USBAT_ATA_SECNUM    0x13  /* sector number (R/W) */
 106 #define USBAT_ATA_LBA_ME    0x14  /* cylinder low (R/W) */
 107 #define USBAT_ATA_LBA_HI    0x15  /* cylinder high (R/W) */
 108 #define USBAT_ATA_DEVICE    0x16  /* head/device selection (R/W) */
 109 #define USBAT_ATA_STATUS    0x17  /* device status (R) */
 110 #define USBAT_ATA_CMD       0x17  /* device command (W) */
 111 #define USBAT_ATA_ALTSTATUS 0x0E  /* status (no clear IRQ) (R) */
 112
 113 /* USBAT User I/O Data registers */
 114 #define USBAT_UIO_EPAD          0x80 /* Enable Peripheral Control Signals */
 115 #define USBAT_UIO_CDT           0x40 /* Card Detect (Read Only) */
 116                                      /* CDT = ACKD & !UI1 & !UI0 */
 117 #define USBAT_UIO_1             0x20 /* I/O 1 */
 118 #define USBAT_UIO_0             0x10 /* I/O 0 */
 119 #define USBAT_UIO_EPP_ATA       0x08 /* 1=EPP mode, 0=ATA mode */
 120 #define USBAT_UIO_UI1           0x04 /* Input 1 */
 121 #define USBAT_UIO_UI0           0x02 /* Input 0 */
 122 #define USBAT_UIO_INTR_ACK      0x01 /* Interrupt (ATA/ISA)/Acknowledge (EPP) */
 123
 124 /* USBAT User I/O Enable registers */
 125 #define USBAT_UIO_DRVRST        0x80 /* Reset Peripheral */
 126 #define USBAT_UIO_ACKD          0x40 /* Enable Card Detect */
 127 #define USBAT_UIO_OE1           0x20 /* I/O 1 set=output/clr=input */
 128                                      /* If ACKD=1, set OE1 to 1 also. */
 129 #define USBAT_UIO_OE0           0x10 /* I/O 0 set=output/clr=input */
 130 #define USBAT_UIO_ADPRST        0x01 /* Reset SCM chip */
 131
 132 /* USBAT Features */
 133 #define USBAT_FEAT_ETEN 0x80    /* External trigger enable */
 134 #define USBAT_FEAT_U1   0x08
 135 #define USBAT_FEAT_U0   0x04
 136 #define USBAT_FEAT_ET1  0x02
 137 #define USBAT_FEAT_ET2  0x01
 138
 139 struct usbat_info {
 140         int devicetype;
 141
 142         /* Used for Flash readers only */
 143         unsigned long sectors;     /* total sector count */
 144         unsigned long ssize;       /* sector size in bytes */
 145
 146         unsigned char sense_key;
 147         unsigned long sense_asc;   /* additional sense code */
 148         unsigned long sense_ascq;  /* additional sense code qualifier */
 149 };
 150
 151 #define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
 152 #define LSB_of(s) ((s)&0xFF)
 153 #define MSB_of(s) ((s)>>8)
 154
 155 static int transferred = 0;
 156
 157 static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
 158 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
 159
 160 static int init_usbat_cd(struct us_data *us);
 161 static int init_usbat_flash(struct us_data *us);
 162
 163
 164 /*
 165  * The table of devices
 166  */
 167 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
 168                     vendorName, productName, useProtocol, useTransport, \
 169                     initFunction, flags) \
 170 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
 171   .driver_info = (flags) }
 172
 173 static struct usb_device_id usbat_usb_ids[] = {
 174 #       include "unusual_usbat.h"
 175         { }             /* Terminating entry */
 176 };
 177 MODULE_DEVICE_TABLE(usb, usbat_usb_ids);
 178
 179 #undef UNUSUAL_DEV
 180
 181 /*
 182  * The flags table
 183  */
 184 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
 185                     vendor_name, product_name, use_protocol, use_transport, \
 186                     init_function, Flags) \
 187 { \
 188         .vendorName = vendor_name,      \
 189         .productName = product_name,    \
 190         .useProtocol = use_protocol,    \
 191         .useTransport = use_transport,  \
 192         .initFunction = init_function,  \
 193 }
 194
 195 static struct us_unusual_dev usbat_unusual_dev_list[] = {
 196 #       include "unusual_usbat.h"
 197         { }             /* Terminating entry */
 198 };
 199
 200 #undef UNUSUAL_DEV
 201
 202 /*
 203  * Convenience function to produce an ATA read/write sectors command
 204  * Use cmd=0x20 for read, cmd=0x30 for write
 205  */
 206 static void usbat_pack_ata_sector_cmd(unsigned char *buf,
 207                                         unsigned char thistime,
 208                                         u32 sector, unsigned char cmd)
 209 {
 210         buf[0] = 0;
 211         buf[1] = thistime;
 212         buf[2] = sector & 0xFF;
 213         buf[3] = (sector >>  8) & 0xFF;
 214         buf[4] = (sector >> 16) & 0xFF;
 215         buf[5] = 0xE0 | ((sector >> 24) & 0x0F);
 216         buf[6] = cmd;
 217 }
 218
 219 /*
 220  * Convenience function to get the device type (flash or hp8200)
 221  */
 222 static int usbat_get_device_type(struct us_data *us)
 223 {
 224         return ((struct usbat_info*)us->extra)->devicetype;
 225 }
 226
 227 /*
 228  * Read a register from the device
 229  */
 230 static int usbat_read(struct us_data *us,
 231                       unsigned char access,
 232                       unsigned char reg,
 233                       unsigned char *content)
 234 {
 235         return usb_stor_ctrl_transfer(us,
 236                 us->recv_ctrl_pipe,
 237                 access | USBAT_CMD_READ_REG,
 238                 0xC0,
 239                 (u16)reg,
 240                 0,
 241                 content,
 242                 1);
 243 }
 244
 245 /*
 246  * Write to a register on the device
 247  */
 248 static int usbat_write(struct us_data *us,
 249                        unsigned char access,
 250                        unsigned char reg,
 251                        unsigned char content)
 252 {
 253         return usb_stor_ctrl_transfer(us,
 254                 us->send_ctrl_pipe,
 255                 access | USBAT_CMD_WRITE_REG,
 256                 0x40,
 257                 short_pack(reg, content),
 258                 0,
 259                 NULL,
 260                 0);
 261 }
 262
 263 /*
 264  * Convenience function to perform a bulk read
 265  */
 266 static int usbat_bulk_read(struct us_data *us,
 267                            void* buf,
 268                            unsigned int len,
 269                            int use_sg)
 270 {
 271         if (len == 0)
 272                 return USB_STOR_XFER_GOOD;
 273
 274         usb_stor_dbg(us, "len = %d\n", len);
 275         return usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe, buf, len, use_sg, NULL);
 276 }
 277
 278 /*
 279  * Convenience function to perform a bulk write
 280  */
 281 static int usbat_bulk_write(struct us_data *us,
 282                             void* buf,
 283                             unsigned int len,
 284                             int use_sg)
 285 {
 286         if (len == 0)
 287                 return USB_STOR_XFER_GOOD;
 288
 289         usb_stor_dbg(us, "len = %d\n", len);
 290         return usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe, buf, len, use_sg, NULL);
 291 }
 292
 293 /*
 294  * Some USBAT-specific commands can only be executed over a command transport
 295  * This transport allows one (len=8) or two (len=16) vendor-specific commands
 296  * to be executed.
 297  */
 298 static int usbat_execute_command(struct us_data *us,
 299                                                                  unsigned char *commands,
 300                                                                  unsigned int len)
 301 {
 302         return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
 303                                                                   USBAT_CMD_EXEC_CMD, 0x40, 0, 0,
 304                                                                   commands, len);
 305 }
 306
 307 /*
 308  * Read the status register
 309  */
 310 static int usbat_get_status(struct us_data *us, unsigned char *status)
 311 {
 312         int rc;
 313         rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status);
 314
 315         usb_stor_dbg(us, "0x%02X\n", *status);
 316         return rc;
 317 }
 318
 319 /*
 320  * Check the device status
 321  */
 322 static int usbat_check_status(struct us_data *us)
 323 {
 324         unsigned char *reply = us->iobuf;
 325         int rc;
 326
 327         rc = usbat_get_status(us, reply);
 328         if (rc != USB_STOR_XFER_GOOD)
 329                 return USB_STOR_TRANSPORT_FAILED;
 330
 331         /* error/check condition (0x51 is ok) */
 332         if (*reply & 0x01 && *reply != 0x51)
 333                 return USB_STOR_TRANSPORT_FAILED;
 334
 335         /* device fault */
 336         if (*reply & 0x20)
 337                 return USB_STOR_TRANSPORT_FAILED;
 338
 339         return USB_STOR_TRANSPORT_GOOD;
 340 }
 341
 342 /*
 343  * Stores critical information in internal registers in preparation for the execution
 344  * of a conditional usbat_read_blocks or usbat_write_blocks call.
 345  */
 346 static int usbat_set_shuttle_features(struct us_data *us,
 347                                       unsigned char external_trigger,
 348                                       unsigned char epp_control,
 349                                       unsigned char mask_byte,
 350                                       unsigned char test_pattern,
 351                                       unsigned char subcountH,
 352                                       unsigned char subcountL)
 353 {
 354         unsigned char *command = us->iobuf;
 355
 356         command[0] = 0x40;
 357         command[1] = USBAT_CMD_SET_FEAT;
 358
 359         /*
 360          * The only bit relevant to ATA access is bit 6
 361          * which defines 8 bit data access (set) or 16 bit (unset)
 362          */
 363         command[2] = epp_control;
 364
 365         /*
 366          * If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
 367          * ET1 and ET2 define an external event to be checked for on event of a
 368          * _read_blocks or _write_blocks operation. The read/write will not take
 369          * place unless the defined trigger signal is active.
 370          */
 371         command[3] = external_trigger;
 372
 373         /*
 374          * The resultant byte of the mask operation (see mask_byte) is compared for
 375          * equivalence with this test pattern. If equal, the read/write will take
 376          * place.
 377          */
 378         command[4] = test_pattern;
 379
 380         /*
 381          * This value is logically ANDed with the status register field specified
 382          * in the read/write command.
 383          */
 384         command[5] = mask_byte;
 385
 386         /*
 387          * If ALQ is set in the qualifier, this field contains the address of the
 388          * registers where the byte count should be read for transferring the data.
 389          * If ALQ is not set, then this field contains the number of bytes to be
 390          * transferred.
 391          */
 392         command[6] = subcountL;
 393         command[7] = subcountH;
 394
 395         return usbat_execute_command(us, command, 8);
 396 }
 397
 398 /*
 399  * Block, waiting for an ATA device to become not busy or to report
 400  * an error condition.
 401  */
 402 static int usbat_wait_not_busy(struct us_data *us, int minutes)
 403 {
 404         int i;
 405         int result;
 406         unsigned char *status = us->iobuf;
 407
 408         /* Synchronizing cache on a CDR could take a heck of a long time,
 409          * but probably not more than 10 minutes or so. On the other hand,
 410          * doing a full blank on a CDRW at speed 1 will take about 75
 411          * minutes!
 412          */
 413
 414         for (i=0; i<1200+minutes*60; i++) {
 415
 416                 result = usbat_get_status(us, status);
 417
 418                 if (result!=USB_STOR_XFER_GOOD)
 419                         return USB_STOR_TRANSPORT_ERROR;
 420                 if (*status & 0x01) { /* check condition */
 421                         result = usbat_read(us, USBAT_ATA, 0x10, status);
 422                         return USB_STOR_TRANSPORT_FAILED;
 423                 }
 424                 if (*status & 0x20) /* device fault */
 425                         return USB_STOR_TRANSPORT_FAILED;
 426
 427                 if ((*status & 0x80)==0x00) { /* not busy */
 428                         usb_stor_dbg(us, "Waited not busy for %d steps\n", i);
 429                         return USB_STOR_TRANSPORT_GOOD;
 430                 }
 431
 432                 if (i<500)
 433                         msleep(10); /* 5 seconds */
 434                 else if (i<700)
 435                         msleep(50); /* 10 seconds */
 436                 else if (i<1200)
 437                         msleep(100); /* 50 seconds */
 438                 else
 439                         msleep(1000); /* X minutes */
 440         }
 441
 442         usb_stor_dbg(us, "Waited not busy for %d minutes, timing out\n",
 443                      minutes);
 444         return USB_STOR_TRANSPORT_FAILED;
 445 }
 446
 447 /*
 448  * Read block data from the data register
 449  */
 450 static int usbat_read_block(struct us_data *us,
 451                             void* buf,
 452                             unsigned short len,
 453                             int use_sg)
 454 {
 455         int result;
 456         unsigned char *command = us->iobuf;
 457
 458         if (!len)
 459                 return USB_STOR_TRANSPORT_GOOD;
 460
 461         command[0] = 0xC0;
 462         command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK;
 463         command[2] = USBAT_ATA_DATA;
 464         command[3] = 0;
 465         command[4] = 0;
 466         command[5] = 0;
 467         command[6] = LSB_of(len);
 468         command[7] = MSB_of(len);
 469
 470         result = usbat_execute_command(us, command, 8);
 471         if (result != USB_STOR_XFER_GOOD)
 472                 return USB_STOR_TRANSPORT_ERROR;
 473
 474         result = usbat_bulk_read(us, buf, len, use_sg);
 475         return (result == USB_STOR_XFER_GOOD ?
 476                         USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
 477 }
 478
 479 /*
 480  * Write block data via the data register
 481  */
 482 static int usbat_write_block(struct us_data *us,
 483                              unsigned char access,
 484                              void* buf,
 485                              unsigned short len,
 486                              int minutes,
 487                              int use_sg)
 488 {
 489         int result;
 490         unsigned char *command = us->iobuf;
 491
 492         if (!len)
 493                 return USB_STOR_TRANSPORT_GOOD;
 494
 495         command[0] = 0x40;
 496         command[1] = access | USBAT_CMD_WRITE_BLOCK;
 497         command[2] = USBAT_ATA_DATA;
 498         command[3] = 0;
 499         command[4] = 0;
 500         command[5] = 0;
 501         command[6] = LSB_of(len);
 502         command[7] = MSB_of(len);
 503
 504         result = usbat_execute_command(us, command, 8);
 505
 506         if (result != USB_STOR_XFER_GOOD)
 507                 return USB_STOR_TRANSPORT_ERROR;
 508
 509         result = usbat_bulk_write(us, buf, len, use_sg);
 510         if (result != USB_STOR_XFER_GOOD)
 511                 return USB_STOR_TRANSPORT_ERROR;
 512
 513         return usbat_wait_not_busy(us, minutes);
 514 }
 515
 516 /*
 517  * Process read and write requests
 518  */
 519 static int usbat_hp8200e_rw_block_test(struct us_data *us,
 520                                        unsigned char access,
 521                                        unsigned char *registers,
 522                                        unsigned char *data_out,
 523                                        unsigned short num_registers,
 524                                        unsigned char data_reg,
 525                                        unsigned char status_reg,
 526                                        unsigned char timeout,
 527                                        unsigned char qualifier,
 528                                        int direction,
 529                                        void *buf,
 530                                        unsigned short len,
 531                                        int use_sg,
 532                                        int minutes)
 533 {
 534         int result;
 535         unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
 536                         us->recv_bulk_pipe : us->send_bulk_pipe;
 537
 538         unsigned char *command = us->iobuf;
 539         int i, j;
 540         int cmdlen;
 541         unsigned char *data = us->iobuf;
 542         unsigned char *status = us->iobuf;
 543
 544         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 545
 546         for (i=0; i<20; i++) {
 547
 548                 /*
 549                  * The first time we send the full command, which consists
 550                  * of downloading the SCSI command followed by downloading
 551                  * the data via a write-and-test.  Any other time we only
 552                  * send the command to download the data -- the SCSI command
 553                  * is still 'active' in some sense in the device.
 554                  *
 555                  * We're only going to try sending the data 10 times. After
 556                  * that, we just return a failure.
 557                  */
 558
 559                 if (i==0) {
 560                         cmdlen = 16;
 561                         /*
 562                          * Write to multiple registers
 563                          * Not really sure the 0x07, 0x17, 0xfc, 0xe7 is
 564                          * necessary here, but that's what came out of the
 565                          * trace every single time.
 566                          */
 567                         command[0] = 0x40;
 568                         command[1] = access | USBAT_CMD_WRITE_REGS;
 569                         command[2] = 0x07;
 570                         command[3] = 0x17;
 571                         command[4] = 0xFC;
 572                         command[5] = 0xE7;
 573                         command[6] = LSB_of(num_registers*2);
 574                         command[7] = MSB_of(num_registers*2);
 575                 } else
 576                         cmdlen = 8;
 577
 578                 /* Conditionally read or write blocks */
 579                 command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
 580                 command[cmdlen-7] = access |
 581                                 (direction==DMA_TO_DEVICE ?
 582                                  USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK);
 583                 command[cmdlen-6] = data_reg;
 584                 command[cmdlen-5] = status_reg;
 585                 command[cmdlen-4] = timeout;
 586                 command[cmdlen-3] = qualifier;
 587                 command[cmdlen-2] = LSB_of(len);
 588                 command[cmdlen-1] = MSB_of(len);
 589
 590                 result = usbat_execute_command(us, command, cmdlen);
 591
 592                 if (result != USB_STOR_XFER_GOOD)
 593                         return USB_STOR_TRANSPORT_ERROR;
 594
 595                 if (i==0) {
 596
 597                         for (j=0; j<num_registers; j++) {
 598                                 data[j<<1] = registers[j];
 599                                 data[1+(j<<1)] = data_out[j];
 600                         }
 601
 602                         result = usbat_bulk_write(us, data, num_registers*2, 0);
 603                         if (result != USB_STOR_XFER_GOOD)
 604                                 return USB_STOR_TRANSPORT_ERROR;
 605
 606                 }
 607
 608                 result = usb_stor_bulk_transfer_sg(us,
 609                         pipe, buf, len, use_sg, NULL);
 610
 611                 /*
 612                  * If we get a stall on the bulk download, we'll retry
 613                  * the bulk download -- but not the SCSI command because
 614                  * in some sense the SCSI command is still 'active' and
 615                  * waiting for the data. Don't ask me why this should be;
 616                  * I'm only following what the Windoze driver did.
 617                  *
 618                  * Note that a stall for the test-and-read/write command means
 619                  * that the test failed. In this case we're testing to make
 620                  * sure that the device is error-free
 621                  * (i.e. bit 0 -- CHK -- of status is 0). The most likely
 622                  * hypothesis is that the USBAT chip somehow knows what
 623                  * the device will accept, but doesn't give the device any
 624                  * data until all data is received. Thus, the device would
 625                  * still be waiting for the first byte of data if a stall
 626                  * occurs, even if the stall implies that some data was
 627                  * transferred.
 628                  */
 629
 630                 if (result == USB_STOR_XFER_SHORT ||
 631                                 result == USB_STOR_XFER_STALLED) {
 632
 633                         /*
 634                          * If we're reading and we stalled, then clear
 635                          * the bulk output pipe only the first time.
 636                          */
 637
 638                         if (direction==DMA_FROM_DEVICE && i==0) {
 639                                 if (usb_stor_clear_halt(us,
 640                                                 us->send_bulk_pipe) < 0)
 641                                         return USB_STOR_TRANSPORT_ERROR;
 642                         }
 643
 644                         /*
 645                          * Read status: is the device angry, or just busy?
 646                          */
 647
 648                         result = usbat_read(us, USBAT_ATA,
 649                                 direction==DMA_TO_DEVICE ?
 650                                         USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS,
 651                                 status);
 652
 653                         if (result!=USB_STOR_XFER_GOOD)
 654                                 return USB_STOR_TRANSPORT_ERROR;
 655                         if (*status & 0x01) /* check condition */
 656                                 return USB_STOR_TRANSPORT_FAILED;
 657                         if (*status & 0x20) /* device fault */
 658                                 return USB_STOR_TRANSPORT_FAILED;
 659
 660                         usb_stor_dbg(us, "Redoing %s\n",
 661                                      direction == DMA_TO_DEVICE
 662                                      ? "write" : "read");
 663
 664                 } else if (result != USB_STOR_XFER_GOOD)
 665                         return USB_STOR_TRANSPORT_ERROR;
 666                 else
 667                         return usbat_wait_not_busy(us, minutes);
 668
 669         }
 670
 671         usb_stor_dbg(us, "Bummer! %s bulk data 20 times failed\n",
 672                      direction == DMA_TO_DEVICE ? "Writing" : "Reading");
 673
 674         return USB_STOR_TRANSPORT_FAILED;
 675 }
 676
 677 /*
 678  * Write to multiple registers:
 679  * Allows us to write specific data to any registers. The data to be written
 680  * gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN
 681  * which gets sent through bulk out.
 682  * Not designed for large transfers of data!
 683  */
 684 static int usbat_multiple_write(struct us_data *us,
 685                                 unsigned char *registers,
 686                                 unsigned char *data_out,
 687                                 unsigned short num_registers)
 688 {
 689         int i, result;
 690         unsigned char *data = us->iobuf;
 691         unsigned char *command = us->iobuf;
 692
 693         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 694
 695         /* Write to multiple registers, ATA access */
 696         command[0] = 0x40;
 697         command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
 698
 699         /* No relevance */
 700         command[2] = 0;
 701         command[3] = 0;
 702         command[4] = 0;
 703         command[5] = 0;
 704
 705         /* Number of bytes to be transferred (incl. addresses and data) */
 706         command[6] = LSB_of(num_registers*2);
 707         command[7] = MSB_of(num_registers*2);
 708
 709         /* The setup command */
 710         result = usbat_execute_command(us, command, 8);
 711         if (result != USB_STOR_XFER_GOOD)
 712                 return USB_STOR_TRANSPORT_ERROR;
 713
 714         /* Create the reg/data, reg/data sequence */
 715         for (i=0; i<num_registers; i++) {
 716                 data[i<<1] = registers[i];
 717                 data[1+(i<<1)] = data_out[i];
 718         }
 719
 720         /* Send the data */
 721         result = usbat_bulk_write(us, data, num_registers*2, 0);
 722         if (result != USB_STOR_XFER_GOOD)
 723                 return USB_STOR_TRANSPORT_ERROR;
 724
 725         if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
 726                 return usbat_wait_not_busy(us, 0);
 727         else
 728                 return USB_STOR_TRANSPORT_GOOD;
 729 }
 730
 731 /*
 732  * Conditionally read blocks from device:
 733  * Allows us to read blocks from a specific data register, based upon the
 734  * condition that a status register can be successfully masked with a status
 735  * qualifier. If this condition is not initially met, the read will wait
 736  * up until a maximum amount of time has elapsed, as specified by timeout.
 737  * The read will start when the condition is met, otherwise the command aborts.
 738  *
 739  * The qualifier defined here is not the value that is masked, it defines
 740  * conditions for the write to take place. The actual masked qualifier (and
 741  * other related details) are defined beforehand with _set_shuttle_features().
 742  */
 743 static int usbat_read_blocks(struct us_data *us,
 744                              void* buffer,
 745                              int len,
 746                              int use_sg)
 747 {
 748         int result;
 749         unsigned char *command = us->iobuf;
 750
 751         command[0] = 0xC0;
 752         command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
 753         command[2] = USBAT_ATA_DATA;
 754         command[3] = USBAT_ATA_STATUS;
 755         command[4] = 0xFD; /* Timeout (ms); */
 756         command[5] = USBAT_QUAL_FCQ;
 757         command[6] = LSB_of(len);
 758         command[7] = MSB_of(len);
 759
 760         /* Multiple block read setup command */
 761         result = usbat_execute_command(us, command, 8);
 762         if (result != USB_STOR_XFER_GOOD)
 763                 return USB_STOR_TRANSPORT_FAILED;
 764
 765         /* Read the blocks we just asked for */
 766         result = usbat_bulk_read(us, buffer, len, use_sg);
 767         if (result != USB_STOR_XFER_GOOD)
 768                 return USB_STOR_TRANSPORT_FAILED;
 769
 770         return USB_STOR_TRANSPORT_GOOD;
 771 }
 772
 773 /*
 774  * Conditionally write blocks to device:
 775  * Allows us to write blocks to a specific data register, based upon the
 776  * condition that a status register can be successfully masked with a status
 777  * qualifier. If this condition is not initially met, the write will wait
 778  * up until a maximum amount of time has elapsed, as specified by timeout.
 779  * The read will start when the condition is met, otherwise the command aborts.
 780  *
 781  * The qualifier defined here is not the value that is masked, it defines
 782  * conditions for the write to take place. The actual masked qualifier (and
 783  * other related details) are defined beforehand with _set_shuttle_features().
 784  */
 785 static int usbat_write_blocks(struct us_data *us,
 786                               void* buffer,
 787                               int len,
 788                               int use_sg)
 789 {
 790         int result;
 791         unsigned char *command = us->iobuf;
 792
 793         command[0] = 0x40;
 794         command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
 795         command[2] = USBAT_ATA_DATA;
 796         command[3] = USBAT_ATA_STATUS;
 797         command[4] = 0xFD; /* Timeout (ms) */
 798         command[5] = USBAT_QUAL_FCQ;
 799         command[6] = LSB_of(len);
 800         command[7] = MSB_of(len);
 801
 802         /* Multiple block write setup command */
 803         result = usbat_execute_command(us, command, 8);
 804         if (result != USB_STOR_XFER_GOOD)
 805                 return USB_STOR_TRANSPORT_FAILED;
 806
 807         /* Write the data */
 808         result = usbat_bulk_write(us, buffer, len, use_sg);
 809         if (result != USB_STOR_XFER_GOOD)
 810                 return USB_STOR_TRANSPORT_FAILED;
 811
 812         return USB_STOR_TRANSPORT_GOOD;
 813 }
 814
 815 /*
 816  * Read the User IO register
 817  */
 818 static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
 819 {
 820         int result;
 821
 822         result = usb_stor_ctrl_transfer(us,
 823                 us->recv_ctrl_pipe,
 824                 USBAT_CMD_UIO,
 825                 0xC0,
 826                 0,
 827                 0,
 828                 data_flags,
 829                 USBAT_UIO_READ);
 830
 831         usb_stor_dbg(us, "UIO register reads %02X\n", *data_flags);
 832
 833         return result;
 834 }
 835
 836 /*
 837  * Write to the User IO register
 838  */
 839 static int usbat_write_user_io(struct us_data *us,
 840                                unsigned char enable_flags,
 841                                unsigned char data_flags)
 842 {
 843         return usb_stor_ctrl_transfer(us,
 844                 us->send_ctrl_pipe,
 845                 USBAT_CMD_UIO,
 846                 0x40,
 847                 short_pack(enable_flags, data_flags),
 848                 0,
 849                 NULL,
 850                 USBAT_UIO_WRITE);
 851 }
 852
 853 /*
 854  * Reset the device
 855  * Often needed on media change.
 856  */
 857 static int usbat_device_reset(struct us_data *us)
 858 {
 859         int rc;
 860
 861         /*
 862          * Reset peripheral, enable peripheral control signals
 863          * (bring reset signal up)
 864          */
 865         rc = usbat_write_user_io(us,
 866                                                          USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
 867                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
 868         if (rc != USB_STOR_XFER_GOOD)
 869                 return USB_STOR_TRANSPORT_ERROR;
 870
 871         /*
 872          * Enable peripheral control signals
 873          * (bring reset signal down)
 874          */
 875         rc = usbat_write_user_io(us,
 876                                                          USBAT_UIO_OE1  | USBAT_UIO_OE0,
 877                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
 878         if (rc != USB_STOR_XFER_GOOD)
 879                 return USB_STOR_TRANSPORT_ERROR;
 880
 881         return USB_STOR_TRANSPORT_GOOD;
 882 }
 883
 884 /*
 885  * Enable card detect
 886  */
 887 static int usbat_device_enable_cdt(struct us_data *us)
 888 {
 889         int rc;
 890
 891         /* Enable peripheral control signals and card detect */
 892         rc = usbat_write_user_io(us,
 893                                                          USBAT_UIO_ACKD | USBAT_UIO_OE1  | USBAT_UIO_OE0,
 894                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
 895         if (rc != USB_STOR_XFER_GOOD)
 896                 return USB_STOR_TRANSPORT_ERROR;
 897
 898         return USB_STOR_TRANSPORT_GOOD;
 899 }
 900
 901 /*
 902  * Determine if media is present.
 903  */
 904 static int usbat_flash_check_media_present(struct us_data *us,
 905                                            unsigned char *uio)
 906 {
 907         if (*uio & USBAT_UIO_UI0) {
 908                 usb_stor_dbg(us, "no media detected\n");
 909                 return USBAT_FLASH_MEDIA_NONE;
 910         }
 911
 912         return USBAT_FLASH_MEDIA_CF;
 913 }
 914
 915 /*
 916  * Determine if media has changed since last operation
 917  */
 918 static int usbat_flash_check_media_changed(struct us_data *us,
 919                                            unsigned char *uio)
 920 {
 921         if (*uio & USBAT_UIO_0) {
 922                 usb_stor_dbg(us, "media change detected\n");
 923                 return USBAT_FLASH_MEDIA_CHANGED;
 924         }
 925
 926         return USBAT_FLASH_MEDIA_SAME;
 927 }
 928
 929 /*
 930  * Check for media change / no media and handle the situation appropriately
 931  */
 932 static int usbat_flash_check_media(struct us_data *us,
 933                                    struct usbat_info *info)
 934 {
 935         int rc;
 936         unsigned char *uio = us->iobuf;
 937
 938         rc = usbat_read_user_io(us, uio);
 939         if (rc != USB_STOR_XFER_GOOD)
 940                 return USB_STOR_TRANSPORT_ERROR;
 941
 942         /* Check for media existence */
 943         rc = usbat_flash_check_media_present(us, uio);
 944         if (rc == USBAT_FLASH_MEDIA_NONE) {
 945                 info->sense_key = 0x02;
 946                 info->sense_asc = 0x3A;
 947                 info->sense_ascq = 0x00;
 948                 return USB_STOR_TRANSPORT_FAILED;
 949         }
 950
 951         /* Check for media change */
 952         rc = usbat_flash_check_media_changed(us, uio);
 953         if (rc == USBAT_FLASH_MEDIA_CHANGED) {
 954
 955                 /* Reset and re-enable card detect */
 956                 rc = usbat_device_reset(us);
 957                 if (rc != USB_STOR_TRANSPORT_GOOD)
 958                         return rc;
 959                 rc = usbat_device_enable_cdt(us);
 960                 if (rc != USB_STOR_TRANSPORT_GOOD)
 961                         return rc;
 962
 963                 msleep(50);
 964
 965                 rc = usbat_read_user_io(us, uio);
 966                 if (rc != USB_STOR_XFER_GOOD)
 967                         return USB_STOR_TRANSPORT_ERROR;
 968
 969                 info->sense_key = UNIT_ATTENTION;
 970                 info->sense_asc = 0x28;
 971                 info->sense_ascq = 0x00;
 972                 return USB_STOR_TRANSPORT_FAILED;
 973         }
 974
 975         return USB_STOR_TRANSPORT_GOOD;
 976 }
 977
 978 /*
 979  * Determine whether we are controlling a flash-based reader/writer,
 980  * or a HP8200-based CD drive.
 981  * Sets transport functions as appropriate.
 982  */
 983 static int usbat_identify_device(struct us_data *us,
 984                                  struct usbat_info *info)
 985 {
 986         int rc;
 987         unsigned char status;
 988
 989         if (!us || !info)
 990                 return USB_STOR_TRANSPORT_ERROR;
 991
 992         rc = usbat_device_reset(us);
 993         if (rc != USB_STOR_TRANSPORT_GOOD)
 994                 return rc;
 995         msleep(500);
 996
 997         /*
 998          * In attempt to distinguish between HP CDRW's and Flash readers, we now
 999          * execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash
1000          * readers), this command should fail with error. On ATAPI devices (i.e.
1001          * CDROM drives), it should succeed.
1002          */
1003         rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1);
1004         if (rc != USB_STOR_XFER_GOOD)
1005                 return USB_STOR_TRANSPORT_ERROR;
1006
1007         rc = usbat_get_status(us, &status);
1008         if (rc != USB_STOR_XFER_GOOD)
1009                 return USB_STOR_TRANSPORT_ERROR;
1010
1011         /* Check for error bit, or if the command 'fell through' */
1012         if (status == 0xA1 || !(status & 0x01)) {
1013                 /* Device is HP 8200 */
1014                 usb_stor_dbg(us, "Detected HP8200 CDRW\n");
1015                 info->devicetype = USBAT_DEV_HP8200;
1016         } else {
1017                 /* Device is a CompactFlash reader/writer */
1018                 usb_stor_dbg(us, "Detected Flash reader/writer\n");
1019                 info->devicetype = USBAT_DEV_FLASH;
1020         }
1021
1022         return USB_STOR_TRANSPORT_GOOD;
1023 }
1024
1025 /*
1026  * Set the transport function based on the device type
1027  */
1028 static int usbat_set_transport(struct us_data *us,
1029                                struct usbat_info *info,
1030                                int devicetype)
1031 {
1032
1033         if (!info->devicetype)
1034                 info->devicetype = devicetype;
1035
1036         if (!info->devicetype)
1037                 usbat_identify_device(us, info);
1038
1039         switch (info->devicetype) {
1040         default:
1041                 return USB_STOR_TRANSPORT_ERROR;
1042
1043         case  USBAT_DEV_HP8200:
1044                 us->transport = usbat_hp8200e_transport;
1045                 break;
1046
1047         case USBAT_DEV_FLASH:
1048                 us->transport = usbat_flash_transport;
1049                 break;
1050         }
1051
1052         return 0;
1053 }
1054
1055 /*
1056  * Read the media capacity
1057  */
1058 static int usbat_flash_get_sector_count(struct us_data *us,
1059                                         struct usbat_info *info)
1060 {
1061         unsigned char registers[3] = {
1062                 USBAT_ATA_SECCNT,
1063                 USBAT_ATA_DEVICE,
1064                 USBAT_ATA_CMD,
1065         };
1066         unsigned char  command[3] = { 0x01, 0xA0, 0xEC };
1067         unsigned char *reply;
1068         unsigned char status;
1069         int rc;
1070
1071         if (!us || !info)
1072                 return USB_STOR_TRANSPORT_ERROR;
1073
1074         reply = kmalloc(512, GFP_NOIO);
1075         if (!reply)
1076                 return USB_STOR_TRANSPORT_ERROR;
1077
1078         /* ATA command : IDENTIFY DEVICE */
1079         rc = usbat_multiple_write(us, registers, command, 3);
1080         if (rc != USB_STOR_XFER_GOOD) {
1081                 usb_stor_dbg(us, "Gah! identify_device failed\n");
1082                 rc = USB_STOR_TRANSPORT_ERROR;
1083                 goto leave;
1084         }
1085
1086         /* Read device status */
1087         if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
1088                 rc = USB_STOR_TRANSPORT_ERROR;
1089                 goto leave;
1090         }
1091
1092         msleep(100);
1093
1094         /* Read the device identification data */
1095         rc = usbat_read_block(us, reply, 512, 0);
1096         if (rc != USB_STOR_TRANSPORT_GOOD)
1097                 goto leave;
1098
1099         info->sectors = ((u32)(reply[117]) << 24) |
1100                 ((u32)(reply[116]) << 16) |
1101                 ((u32)(reply[115]) <<  8) |
1102                 ((u32)(reply[114])      );
1103
1104         rc = USB_STOR_TRANSPORT_GOOD;
1105
1106  leave:
1107         kfree(reply);
1108         return rc;
1109 }
1110
1111 /*
1112  * Read data from device
1113  */
1114 static int usbat_flash_read_data(struct us_data *us,
1115                                                                  struct usbat_info *info,
1116                                                                  u32 sector,
1117                                                                  u32 sectors)
1118 {
1119         unsigned char registers[7] = {
1120                 USBAT_ATA_FEATURES,
1121                 USBAT_ATA_SECCNT,
1122                 USBAT_ATA_SECNUM,
1123                 USBAT_ATA_LBA_ME,
1124                 USBAT_ATA_LBA_HI,
1125                 USBAT_ATA_DEVICE,
1126                 USBAT_ATA_STATUS,
1127         };
1128         unsigned char command[7];
1129         unsigned char *buffer;
1130         unsigned char  thistime;
1131         unsigned int totallen, alloclen;
1132         int len, result;
1133         unsigned int sg_offset = 0;
1134         struct scatterlist *sg = NULL;
1135
1136         result = usbat_flash_check_media(us, info);
1137         if (result != USB_STOR_TRANSPORT_GOOD)
1138                 return result;
1139
1140         /*
1141          * we're working in LBA mode.  according to the ATA spec,
1142          * we can support up to 28-bit addressing.  I don't know if Jumpshot
1143          * supports beyond 24-bit addressing.  It's kind of hard to test
1144          * since it requires > 8GB CF card.
1145          */
1146
1147         if (sector > 0x0FFFFFFF)
1148                 return USB_STOR_TRANSPORT_ERROR;
1149
1150         totallen = sectors * info->ssize;
1151
1152         /*
1153          * Since we don't read more than 64 KB at a time, we have to create
1154          * a bounce buffer and move the data a piece at a time between the
1155          * bounce buffer and the actual transfer buffer.
1156          */
1157
1158         alloclen = min(totallen, 65536u);
1159         buffer = kmalloc(alloclen, GFP_NOIO);
1160         if (buffer == NULL)
1161                 return USB_STOR_TRANSPORT_ERROR;
1162
1163         do {
1164                 /*
1165                  * loop, never allocate or transfer more than 64k at once
1166                  * (min(128k, 255*info->ssize) is the real limit)
1167                  */
1168                 len = min(totallen, alloclen);
1169                 thistime = (len / info->ssize) & 0xff;
1170
1171                 /* ATA command 0x20 (READ SECTORS) */
1172                 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20);
1173
1174                 /* Write/execute ATA read command */
1175                 result = usbat_multiple_write(us, registers, command, 7);
1176                 if (result != USB_STOR_TRANSPORT_GOOD)
1177                         goto leave;
1178
1179                 /* Read the data we just requested */
1180                 result = usbat_read_blocks(us, buffer, len, 0);
1181                 if (result != USB_STOR_TRANSPORT_GOOD)
1182                         goto leave;
1183
1184                 usb_stor_dbg(us, "%d bytes\n", len);
1185
1186                 /* Store the data in the transfer buffer */
1187                 usb_stor_access_xfer_buf(buffer, len, us->srb,
1188                                          &sg, &sg_offset, TO_XFER_BUF);
1189
1190                 sector += thistime;
1191                 totallen -= len;
1192         } while (totallen > 0);
1193
1194         kfree(buffer);
1195         return USB_STOR_TRANSPORT_GOOD;
1196
1197 leave:
1198         kfree(buffer);
1199         return USB_STOR_TRANSPORT_ERROR;
1200 }
1201
1202 /*
1203  * Write data to device
1204  */
1205 static int usbat_flash_write_data(struct us_data *us,
1206                                                                   struct usbat_info *info,
1207                                                                   u32 sector,
1208                                                                   u32 sectors)
1209 {
1210         unsigned char registers[7] = {
1211                 USBAT_ATA_FEATURES,
1212                 USBAT_ATA_SECCNT,
1213                 USBAT_ATA_SECNUM,
1214                 USBAT_ATA_LBA_ME,
1215                 USBAT_ATA_LBA_HI,
1216                 USBAT_ATA_DEVICE,
1217                 USBAT_ATA_STATUS,
1218         };
1219         unsigned char command[7];
1220         unsigned char *buffer;
1221         unsigned char  thistime;
1222         unsigned int totallen, alloclen;
1223         int len, result;
1224         unsigned int sg_offset = 0;
1225         struct scatterlist *sg = NULL;
1226
1227         result = usbat_flash_check_media(us, info);
1228         if (result != USB_STOR_TRANSPORT_GOOD)
1229                 return result;
1230
1231         /*
1232          * we're working in LBA mode.  according to the ATA spec,
1233          * we can support up to 28-bit addressing.  I don't know if the device
1234          * supports beyond 24-bit addressing.  It's kind of hard to test
1235          * since it requires > 8GB media.
1236          */
1237
1238         if (sector > 0x0FFFFFFF)
1239                 return USB_STOR_TRANSPORT_ERROR;
1240
1241         totallen = sectors * info->ssize;
1242
1243         /*
1244          * Since we don't write more than 64 KB at a time, we have to create
1245          * a bounce buffer and move the data a piece at a time between the
1246          * bounce buffer and the actual transfer buffer.
1247          */
1248
1249         alloclen = min(totallen, 65536u);
1250         buffer = kmalloc(alloclen, GFP_NOIO);
1251         if (buffer == NULL)
1252                 return USB_STOR_TRANSPORT_ERROR;
1253
1254         do {
1255                 /*
1256                  * loop, never allocate or transfer more than 64k at once
1257                  * (min(128k, 255*info->ssize) is the real limit)
1258                  */
1259                 len = min(totallen, alloclen);
1260                 thistime = (len / info->ssize) & 0xff;
1261
1262                 /* Get the data from the transfer buffer */
1263                 usb_stor_access_xfer_buf(buffer, len, us->srb,
1264                                          &sg, &sg_offset, FROM_XFER_BUF);
1265
1266                 /* ATA command 0x30 (WRITE SECTORS) */
1267                 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
1268
1269                 /* Write/execute ATA write command */
1270                 result = usbat_multiple_write(us, registers, command, 7);
1271                 if (result != USB_STOR_TRANSPORT_GOOD)
1272                         goto leave;
1273
1274                 /* Write the data */
1275                 result = usbat_write_blocks(us, buffer, len, 0);
1276                 if (result != USB_STOR_TRANSPORT_GOOD)
1277                         goto leave;
1278
1279                 sector += thistime;
1280                 totallen -= len;
1281         } while (totallen > 0);
1282
1283         kfree(buffer);
1284         return result;
1285
1286 leave:
1287         kfree(buffer);
1288         return USB_STOR_TRANSPORT_ERROR;
1289 }
1290
1291 /*
1292  * Squeeze a potentially huge (> 65535 byte) read10 command into
1293  * a little ( <= 65535 byte) ATAPI pipe
1294  */
1295 static int usbat_hp8200e_handle_read10(struct us_data *us,
1296                                        unsigned char *registers,
1297                                        unsigned char *data,
1298                                        struct scsi_cmnd *srb)
1299 {
1300         int result = USB_STOR_TRANSPORT_GOOD;
1301         unsigned char *buffer;
1302         unsigned int len;
1303         unsigned int sector;
1304         unsigned int sg_offset = 0;
1305         struct scatterlist *sg = NULL;
1306
1307         usb_stor_dbg(us, "transfersize %d\n", srb->transfersize);
1308
1309         if (scsi_bufflen(srb) < 0x10000) {
1310
1311                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1312                         registers, data, 19,
1313                         USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1314                         (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1315                         DMA_FROM_DEVICE,
1316                         scsi_sglist(srb),
1317                         scsi_bufflen(srb), scsi_sg_count(srb), 1);
1318
1319                 return result;
1320         }
1321
1322         /*
1323          * Since we're requesting more data than we can handle in
1324          * a single read command (max is 64k-1), we will perform
1325          * multiple reads, but each read must be in multiples of
1326          * a sector.  Luckily the sector size is in srb->transfersize
1327          * (see linux/drivers/scsi/sr.c).
1328          */
1329
1330         if (data[7+0] == GPCMD_READ_CD) {
1331                 len = short_pack(data[7+9], data[7+8]);
1332                 len <<= 16;
1333                 len |= data[7+7];
1334                 usb_stor_dbg(us, "GPCMD_READ_CD: len %d\n", len);
1335                 srb->transfersize = scsi_bufflen(srb)/len;
1336         }
1337
1338         if (!srb->transfersize)  {
1339                 srb->transfersize = 2048; /* A guess */
1340                 usb_stor_dbg(us, "transfersize 0, forcing %d\n",
1341                              srb->transfersize);
1342         }
1343
1344         /*
1345          * Since we only read in one block at a time, we have to create
1346          * a bounce buffer and move the data a piece at a time between the
1347          * bounce buffer and the actual transfer buffer.
1348          */
1349
1350         len = (65535/srb->transfersize) * srb->transfersize;
1351         usb_stor_dbg(us, "Max read is %d bytes\n", len);
1352         len = min(len, scsi_bufflen(srb));
1353         buffer = kmalloc(len, GFP_NOIO);
1354         if (buffer == NULL) /* bloody hell! */
1355                 return USB_STOR_TRANSPORT_FAILED;
1356         sector = short_pack(data[7+3], data[7+2]);
1357         sector <<= 16;
1358         sector |= short_pack(data[7+5], data[7+4]);
1359         transferred = 0;
1360
1361         while (transferred != scsi_bufflen(srb)) {
1362
1363                 if (len > scsi_bufflen(srb) - transferred)
1364                         len = scsi_bufflen(srb) - transferred;
1365
1366                 data[3] = len&0xFF;       /* (cylL) = expected length (L) */
1367                 data[4] = (len>>8)&0xFF;  /* (cylH) = expected length (H) */
1368
1369                 /* Fix up the SCSI command sector and num sectors */
1370
1371                 data[7+2] = MSB_of(sector>>16); /* SCSI command sector */
1372                 data[7+3] = LSB_of(sector>>16);
1373                 data[7+4] = MSB_of(sector&0xFFFF);
1374                 data[7+5] = LSB_of(sector&0xFFFF);
1375                 if (data[7+0] == GPCMD_READ_CD)
1376                         data[7+6] = 0;
1377                 data[7+7] = MSB_of(len / srb->transfersize); /* SCSI command */
1378                 data[7+8] = LSB_of(len / srb->transfersize); /* num sectors */
1379
1380                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1381                         registers, data, 19,
1382                         USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1383                         (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1384                         DMA_FROM_DEVICE,
1385                         buffer,
1386                         len, 0, 1);
1387
1388                 if (result != USB_STOR_TRANSPORT_GOOD)
1389                         break;
1390
1391                 /* Store the data in the transfer buffer */
1392                 usb_stor_access_xfer_buf(buffer, len, srb,
1393                                  &sg, &sg_offset, TO_XFER_BUF);
1394
1395                 /* Update the amount transferred and the sector number */
1396
1397                 transferred += len;
1398                 sector += len / srb->transfersize;
1399
1400         } /* while transferred != scsi_bufflen(srb) */
1401
1402         kfree(buffer);
1403         return result;
1404 }
1405
1406 static int usbat_select_and_test_registers(struct us_data *us)
1407 {
1408         int selector;
1409         unsigned char *status = us->iobuf;
1410
1411         /* try device = master, then device = slave. */
1412         for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
1413                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
1414                                 USB_STOR_XFER_GOOD)
1415                         return USB_STOR_TRANSPORT_ERROR;
1416
1417                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) !=
1418                                 USB_STOR_XFER_GOOD)
1419                         return USB_STOR_TRANSPORT_ERROR;
1420
1421                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) !=
1422                                 USB_STOR_XFER_GOOD)
1423                         return USB_STOR_TRANSPORT_ERROR;
1424
1425                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1426                                 USB_STOR_XFER_GOOD)
1427                         return USB_STOR_TRANSPORT_ERROR;
1428
1429                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1430                                 USB_STOR_XFER_GOOD)
1431                         return USB_STOR_TRANSPORT_ERROR;
1432
1433                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) !=
1434                                 USB_STOR_XFER_GOOD)
1435                         return USB_STOR_TRANSPORT_ERROR;
1436
1437                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) !=
1438                                 USB_STOR_XFER_GOOD)
1439                         return USB_STOR_TRANSPORT_ERROR;
1440
1441                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1442                                 USB_STOR_XFER_GOOD)
1443                         return USB_STOR_TRANSPORT_ERROR;
1444
1445                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1446                                 USB_STOR_XFER_GOOD)
1447                         return USB_STOR_TRANSPORT_ERROR;
1448         }
1449
1450         return USB_STOR_TRANSPORT_GOOD;
1451 }
1452
1453 /*
1454  * Initialize the USBAT processor and the storage device
1455  */
1456 static int init_usbat(struct us_data *us, int devicetype)
1457 {
1458         int rc;
1459         struct usbat_info *info;
1460         unsigned char subcountH = USBAT_ATA_LBA_HI;
1461         unsigned char subcountL = USBAT_ATA_LBA_ME;
1462         unsigned char *status = us->iobuf;
1463
1464         us->extra = kzalloc(sizeof(struct usbat_info), GFP_NOIO);
1465         if (!us->extra)
1466                 return 1;
1467
1468         info = (struct usbat_info *) (us->extra);
1469
1470         /* Enable peripheral control signals */
1471         rc = usbat_write_user_io(us,
1472                                  USBAT_UIO_OE1 | USBAT_UIO_OE0,
1473                                  USBAT_UIO_EPAD | USBAT_UIO_1);
1474         if (rc != USB_STOR_XFER_GOOD)
1475                 return USB_STOR_TRANSPORT_ERROR;
1476
1477         usb_stor_dbg(us, "INIT 1\n");
1478
1479         msleep(2000);
1480
1481         rc = usbat_read_user_io(us, status);
1482         if (rc != USB_STOR_TRANSPORT_GOOD)
1483                 return rc;
1484
1485         usb_stor_dbg(us, "INIT 2\n");
1486
1487         rc = usbat_read_user_io(us, status);
1488         if (rc != USB_STOR_XFER_GOOD)
1489                 return USB_STOR_TRANSPORT_ERROR;
1490
1491         rc = usbat_read_user_io(us, status);
1492         if (rc != USB_STOR_XFER_GOOD)
1493                 return USB_STOR_TRANSPORT_ERROR;
1494
1495         usb_stor_dbg(us, "INIT 3\n");
1496
1497         rc = usbat_select_and_test_registers(us);
1498         if (rc != USB_STOR_TRANSPORT_GOOD)
1499                 return rc;
1500
1501         usb_stor_dbg(us, "INIT 4\n");
1502
1503         rc = usbat_read_user_io(us, status);
1504         if (rc != USB_STOR_XFER_GOOD)
1505                 return USB_STOR_TRANSPORT_ERROR;
1506
1507         usb_stor_dbg(us, "INIT 5\n");
1508
1509         /* Enable peripheral control signals and card detect */
1510         rc = usbat_device_enable_cdt(us);
1511         if (rc != USB_STOR_TRANSPORT_GOOD)
1512                 return rc;
1513
1514         usb_stor_dbg(us, "INIT 6\n");
1515
1516         rc = usbat_read_user_io(us, status);
1517         if (rc != USB_STOR_XFER_GOOD)
1518                 return USB_STOR_TRANSPORT_ERROR;
1519
1520         usb_stor_dbg(us, "INIT 7\n");
1521
1522         msleep(1400);
1523
1524         rc = usbat_read_user_io(us, status);
1525         if (rc != USB_STOR_XFER_GOOD)
1526                 return USB_STOR_TRANSPORT_ERROR;
1527
1528         usb_stor_dbg(us, "INIT 8\n");
1529
1530         rc = usbat_select_and_test_registers(us);
1531         if (rc != USB_STOR_TRANSPORT_GOOD)
1532                 return rc;
1533
1534         usb_stor_dbg(us, "INIT 9\n");
1535
1536         /* At this point, we need to detect which device we are using */
1537         if (usbat_set_transport(us, info, devicetype))
1538                 return USB_STOR_TRANSPORT_ERROR;
1539
1540         usb_stor_dbg(us, "INIT 10\n");
1541
1542         if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
1543                 subcountH = 0x02;
1544                 subcountL = 0x00;
1545         }
1546         rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
1547                                                                         0x00, 0x88, 0x08, subcountH, subcountL);
1548         if (rc != USB_STOR_XFER_GOOD)
1549                 return USB_STOR_TRANSPORT_ERROR;
1550
1551         usb_stor_dbg(us, "INIT 11\n");
1552
1553         return USB_STOR_TRANSPORT_GOOD;
1554 }
1555
1556 /*
1557  * Transport for the HP 8200e
1558  */
1559 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
1560 {
1561         int result;
1562         unsigned char *status = us->iobuf;
1563         unsigned char registers[32];
1564         unsigned char data[32];
1565         unsigned int len;
1566         int i;
1567
1568         len = scsi_bufflen(srb);
1569
1570         /* Send A0 (ATA PACKET COMMAND).
1571            Note: I guess we're never going to get any of the ATA
1572            commands... just ATA Packet Commands.
1573          */
1574
1575         registers[0] = USBAT_ATA_FEATURES;
1576         registers[1] = USBAT_ATA_SECCNT;
1577         registers[2] = USBAT_ATA_SECNUM;
1578         registers[3] = USBAT_ATA_LBA_ME;
1579         registers[4] = USBAT_ATA_LBA_HI;
1580         registers[5] = USBAT_ATA_DEVICE;
1581         registers[6] = USBAT_ATA_CMD;
1582         data[0] = 0x00;
1583         data[1] = 0x00;
1584         data[2] = 0x00;
1585         data[3] = len&0xFF;             /* (cylL) = expected length (L) */
1586         data[4] = (len>>8)&0xFF;        /* (cylH) = expected length (H) */
1587         data[5] = 0xB0;                 /* (device sel) = slave */
1588         data[6] = 0xA0;                 /* (command) = ATA PACKET COMMAND */
1589
1590         for (i=7; i<19; i++) {
1591                 registers[i] = 0x10;
1592                 data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
1593         }
1594
1595         result = usbat_get_status(us, status);
1596         usb_stor_dbg(us, "Status = %02X\n", *status);
1597         if (result != USB_STOR_XFER_GOOD)
1598                 return USB_STOR_TRANSPORT_ERROR;
1599         if (srb->cmnd[0] == TEST_UNIT_READY)
1600                 transferred = 0;
1601
1602         if (srb->sc_data_direction == DMA_TO_DEVICE) {
1603
1604                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1605                         registers, data, 19,
1606                         USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1607                         (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1608                         DMA_TO_DEVICE,
1609                         scsi_sglist(srb),
1610                         len, scsi_sg_count(srb), 10);
1611
1612                 if (result == USB_STOR_TRANSPORT_GOOD) {
1613                         transferred += len;
1614                         usb_stor_dbg(us, "Wrote %08X bytes\n", transferred);
1615                 }
1616
1617                 return result;
1618
1619         } else if (srb->cmnd[0] == READ_10 ||
1620                    srb->cmnd[0] == GPCMD_READ_CD) {
1621
1622                 return usbat_hp8200e_handle_read10(us, registers, data, srb);
1623
1624         }
1625
1626         if (len > 0xFFFF) {
1627                 usb_stor_dbg(us, "Error: len = %08X... what do I do now?\n",
1628                              len);
1629                 return USB_STOR_TRANSPORT_ERROR;
1630         }
1631
1632         result = usbat_multiple_write(us, registers, data, 7);
1633
1634         if (result != USB_STOR_TRANSPORT_GOOD)
1635                 return result;
1636
1637         /*
1638          * Write the 12-byte command header.
1639          *
1640          * If the command is BLANK then set the timer for 75 minutes.
1641          * Otherwise set it for 10 minutes.
1642          *
1643          * NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
1644          * AT SPEED 4 IS UNRELIABLE!!!
1645          */
1646
1647         result = usbat_write_block(us, USBAT_ATA, srb->cmnd, 12,
1648                                    srb->cmnd[0] == GPCMD_BLANK ? 75 : 10, 0);
1649
1650         if (result != USB_STOR_TRANSPORT_GOOD)
1651                 return result;
1652
1653         /* If there is response data to be read in then do it here. */
1654
1655         if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
1656
1657                 /* How many bytes to read in? Check cylL register */
1658
1659                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1660                         USB_STOR_XFER_GOOD) {
1661                         return USB_STOR_TRANSPORT_ERROR;
1662                 }
1663
1664                 if (len > 0xFF) { /* need to read cylH also */
1665                         len = *status;
1666                         if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1667                                     USB_STOR_XFER_GOOD) {
1668                                 return USB_STOR_TRANSPORT_ERROR;
1669                         }
1670                         len += ((unsigned int) *status)<<8;
1671                 }
1672                 else
1673                         len = *status;
1674
1675
1676                 result = usbat_read_block(us, scsi_sglist(srb), len,
1677                                                            scsi_sg_count(srb));
1678         }
1679
1680         return result;
1681 }
1682
1683 /*
1684  * Transport for USBAT02-based CompactFlash and similar storage devices
1685  */
1686 static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
1687 {
1688         int rc;
1689         struct usbat_info *info = (struct usbat_info *) (us->extra);
1690         unsigned long block, blocks;
1691         unsigned char *ptr = us->iobuf;
1692         static unsigned char inquiry_response[36] = {
1693                 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
1694         };
1695
1696         if (srb->cmnd[0] == INQUIRY) {
1697                 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
1698                 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
1699                 fill_inquiry_response(us, ptr, 36);
1700                 return USB_STOR_TRANSPORT_GOOD;
1701         }
1702
1703         if (srb->cmnd[0] == READ_CAPACITY) {
1704                 rc = usbat_flash_check_media(us, info);
1705                 if (rc != USB_STOR_TRANSPORT_GOOD)
1706                         return rc;
1707
1708                 rc = usbat_flash_get_sector_count(us, info);
1709                 if (rc != USB_STOR_TRANSPORT_GOOD)
1710                         return rc;
1711
1712                 /* hard coded 512 byte sectors as per ATA spec */
1713                 info->ssize = 0x200;
1714                 usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
1715                              info->sectors, info->ssize);
1716
1717                 /*
1718                  * build the reply
1719                  * note: must return the sector number of the last sector,
1720                  * *not* the total number of sectors
1721                  */
1722                 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
1723                 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
1724                 usb_stor_set_xfer_buf(ptr, 8, srb);
1725
1726                 return USB_STOR_TRANSPORT_GOOD;
1727         }
1728
1729         if (srb->cmnd[0] == MODE_SELECT_10) {
1730                 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
1731                 return USB_STOR_TRANSPORT_ERROR;
1732         }
1733
1734         if (srb->cmnd[0] == READ_10) {
1735                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1736                                 ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1737
1738                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1739
1740                 usb_stor_dbg(us, "READ_10: read block 0x%04lx  count %ld\n",
1741                              block, blocks);
1742                 return usbat_flash_read_data(us, info, block, blocks);
1743         }
1744
1745         if (srb->cmnd[0] == READ_12) {
1746                 /*
1747                  * I don't think we'll ever see a READ_12 but support it anyway
1748                  */
1749                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1750                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1751
1752                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1753                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
1754
1755                 usb_stor_dbg(us, "READ_12: read block 0x%04lx  count %ld\n",
1756                              block, blocks);
1757                 return usbat_flash_read_data(us, info, block, blocks);
1758         }
1759
1760         if (srb->cmnd[0] == WRITE_10) {
1761                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1762                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1763
1764                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1765
1766                 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx  count %ld\n",
1767                              block, blocks);
1768                 return usbat_flash_write_data(us, info, block, blocks);
1769         }
1770
1771         if (srb->cmnd[0] == WRITE_12) {
1772                 /*
1773                  * I don't think we'll ever see a WRITE_12 but support it anyway
1774                  */
1775                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1776                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1777
1778                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1779                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
1780
1781                 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx  count %ld\n",
1782                              block, blocks);
1783                 return usbat_flash_write_data(us, info, block, blocks);
1784         }
1785
1786
1787         if (srb->cmnd[0] == TEST_UNIT_READY) {
1788                 usb_stor_dbg(us, "TEST_UNIT_READY\n");
1789
1790                 rc = usbat_flash_check_media(us, info);
1791                 if (rc != USB_STOR_TRANSPORT_GOOD)
1792                         return rc;
1793
1794                 return usbat_check_status(us);
1795         }
1796
1797         if (srb->cmnd[0] == REQUEST_SENSE) {
1798                 usb_stor_dbg(us, "REQUEST_SENSE\n");
1799
1800                 memset(ptr, 0, 18);
1801                 ptr[0] = 0xF0;
1802                 ptr[2] = info->sense_key;
1803                 ptr[7] = 11;
1804                 ptr[12] = info->sense_asc;
1805                 ptr[13] = info->sense_ascq;
1806                 usb_stor_set_xfer_buf(ptr, 18, srb);
1807
1808                 return USB_STOR_TRANSPORT_GOOD;
1809         }
1810
1811         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
1812                 /*
1813                  * sure.  whatever.  not like we can stop the user from popping
1814                  * the media out of the device (no locking doors, etc)
1815                  */
1816                 return USB_STOR_TRANSPORT_GOOD;
1817         }
1818
1819         usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
1820                      srb->cmnd[0], srb->cmnd[0]);
1821         info->sense_key = 0x05;
1822         info->sense_asc = 0x20;
1823         info->sense_ascq = 0x00;
1824         return USB_STOR_TRANSPORT_FAILED;
1825 }
1826
1827 static int init_usbat_cd(struct us_data *us)
1828 {
1829         return init_usbat(us, USBAT_DEV_HP8200);
1830 }
1831
1832 static int init_usbat_flash(struct us_data *us)
1833 {
1834         return init_usbat(us, USBAT_DEV_FLASH);
1835 }
1836
1837 static int usbat_probe(struct usb_interface *intf,
1838                          const struct usb_device_id *id)
1839 {
1840         struct us_data *us;
1841         int result;
1842
1843         result = usb_stor_probe1(&us, intf, id,
1844                         (id - usbat_usb_ids) + usbat_unusual_dev_list);
1845         if (result)
1846                 return result;
1847
1848         /* The actual transport will be determined later by the
1849          * initialization routine; this is just a placeholder.
1850          */
1851         us->transport_name = "Shuttle USBAT";
1852         us->transport = usbat_flash_transport;
1853         us->transport_reset = usb_stor_CB_reset;
1854         us->max_lun = 0;
1855
1856         result = usb_stor_probe2(us);
1857         return result;
1858 }
1859
1860 static struct usb_driver usbat_driver = {
1861         .name =         "ums-usbat",
1862         .probe =        usbat_probe,
1863         .disconnect =   usb_stor_disconnect,
1864         .suspend =      usb_stor_suspend,
1865         .resume =       usb_stor_resume,
1866         .reset_resume = usb_stor_reset_resume,
1867         .pre_reset =    usb_stor_pre_reset,
1868         .post_reset =   usb_stor_post_reset,
1869         .id_table =     usbat_usb_ids,
1870         .soft_unbind =  1,
1871         .no_dynamic_id = 1,
1872 };
1873
1874 module_usb_driver(usbat_driver);