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 #include "scsiglue.h"
  57
  58 #define DRV_NAME "ums-usbat"
  59
  60 MODULE_DESCRIPTION("Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable");
  61 MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>, Robert Baruch <autophile@starband.net>");
  62 MODULE_LICENSE("GPL");
  63
  64 /* Supported device types */
  65 #define USBAT_DEV_HP8200        0x01
  66 #define USBAT_DEV_FLASH         0x02
  67
  68 #define USBAT_EPP_PORT          0x10
  69 #define USBAT_EPP_REGISTER      0x30
  70 #define USBAT_ATA               0x40
  71 #define USBAT_ISA               0x50
  72
  73 /* Commands (need to be logically OR'd with an access type */
  74 #define USBAT_CMD_READ_REG              0x00
  75 #define USBAT_CMD_WRITE_REG             0x01
  76 #define USBAT_CMD_READ_BLOCK    0x02
  77 #define USBAT_CMD_WRITE_BLOCK   0x03
  78 #define USBAT_CMD_COND_READ_BLOCK       0x04
  79 #define USBAT_CMD_COND_WRITE_BLOCK      0x05
  80 #define USBAT_CMD_WRITE_REGS    0x07
  81
  82 /* Commands (these don't need an access type) */
  83 #define USBAT_CMD_EXEC_CMD      0x80
  84 #define USBAT_CMD_SET_FEAT      0x81
  85 #define USBAT_CMD_UIO           0x82
  86
  87 /* Methods of accessing UIO register */
  88 #define USBAT_UIO_READ  1
  89 #define USBAT_UIO_WRITE 0
  90
  91 /* Qualifier bits */
  92 #define USBAT_QUAL_FCQ  0x20    /* full compare */
  93 #define USBAT_QUAL_ALQ  0x10    /* auto load subcount */
  94
  95 /* USBAT Flash Media status types */
  96 #define USBAT_FLASH_MEDIA_NONE  0
  97 #define USBAT_FLASH_MEDIA_CF    1
  98
  99 /* USBAT Flash Media change types */
 100 #define USBAT_FLASH_MEDIA_SAME  0
 101 #define USBAT_FLASH_MEDIA_CHANGED       1
 102
 103 /* USBAT ATA registers */
 104 #define USBAT_ATA_DATA      0x10  /* read/write data (R/W) */
 105 #define USBAT_ATA_FEATURES  0x11  /* set features (W) */
 106 #define USBAT_ATA_ERROR     0x11  /* error (R) */
 107 #define USBAT_ATA_SECCNT    0x12  /* sector count (R/W) */
 108 #define USBAT_ATA_SECNUM    0x13  /* sector number (R/W) */
 109 #define USBAT_ATA_LBA_ME    0x14  /* cylinder low (R/W) */
 110 #define USBAT_ATA_LBA_HI    0x15  /* cylinder high (R/W) */
 111 #define USBAT_ATA_DEVICE    0x16  /* head/device selection (R/W) */
 112 #define USBAT_ATA_STATUS    0x17  /* device status (R) */
 113 #define USBAT_ATA_CMD       0x17  /* device command (W) */
 114 #define USBAT_ATA_ALTSTATUS 0x0E  /* status (no clear IRQ) (R) */
 115
 116 /* USBAT User I/O Data registers */
 117 #define USBAT_UIO_EPAD          0x80 /* Enable Peripheral Control Signals */
 118 #define USBAT_UIO_CDT           0x40 /* Card Detect (Read Only) */
 119                                      /* CDT = ACKD & !UI1 & !UI0 */
 120 #define USBAT_UIO_1             0x20 /* I/O 1 */
 121 #define USBAT_UIO_0             0x10 /* I/O 0 */
 122 #define USBAT_UIO_EPP_ATA       0x08 /* 1=EPP mode, 0=ATA mode */
 123 #define USBAT_UIO_UI1           0x04 /* Input 1 */
 124 #define USBAT_UIO_UI0           0x02 /* Input 0 */
 125 #define USBAT_UIO_INTR_ACK      0x01 /* Interrupt (ATA/ISA)/Acknowledge (EPP) */
 126
 127 /* USBAT User I/O Enable registers */
 128 #define USBAT_UIO_DRVRST        0x80 /* Reset Peripheral */
 129 #define USBAT_UIO_ACKD          0x40 /* Enable Card Detect */
 130 #define USBAT_UIO_OE1           0x20 /* I/O 1 set=output/clr=input */
 131                                      /* If ACKD=1, set OE1 to 1 also. */
 132 #define USBAT_UIO_OE0           0x10 /* I/O 0 set=output/clr=input */
 133 #define USBAT_UIO_ADPRST        0x01 /* Reset SCM chip */
 134
 135 /* USBAT Features */
 136 #define USBAT_FEAT_ETEN 0x80    /* External trigger enable */
 137 #define USBAT_FEAT_U1   0x08
 138 #define USBAT_FEAT_U0   0x04
 139 #define USBAT_FEAT_ET1  0x02
 140 #define USBAT_FEAT_ET2  0x01
 141
 142 struct usbat_info {
 143         int devicetype;
 144
 145         /* Used for Flash readers only */
 146         unsigned long sectors;     /* total sector count */
 147         unsigned long ssize;       /* sector size in bytes */
 148
 149         unsigned char sense_key;
 150         unsigned long sense_asc;   /* additional sense code */
 151         unsigned long sense_ascq;  /* additional sense code qualifier */
 152 };
 153
 154 #define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
 155 #define LSB_of(s) ((s)&0xFF)
 156 #define MSB_of(s) ((s)>>8)
 157
 158 static int transferred = 0;
 159
 160 static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
 161 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
 162
 163 static int init_usbat_cd(struct us_data *us);
 164 static int init_usbat_flash(struct us_data *us);
 165
 166
 167 /*
 168  * The table of devices
 169  */
 170 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
 171                     vendorName, productName, useProtocol, useTransport, \
 172                     initFunction, flags) \
 173 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
 174   .driver_info = (flags) }
 175
 176 static struct usb_device_id usbat_usb_ids[] = {
 177 #       include "unusual_usbat.h"
 178         { }             /* Terminating entry */
 179 };
 180 MODULE_DEVICE_TABLE(usb, usbat_usb_ids);
 181
 182 #undef UNUSUAL_DEV
 183
 184 /*
 185  * The flags table
 186  */
 187 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
 188                     vendor_name, product_name, use_protocol, use_transport, \
 189                     init_function, Flags) \
 190 { \
 191         .vendorName = vendor_name,      \
 192         .productName = product_name,    \
 193         .useProtocol = use_protocol,    \
 194         .useTransport = use_transport,  \
 195         .initFunction = init_function,  \
 196 }
 197
 198 static struct us_unusual_dev usbat_unusual_dev_list[] = {
 199 #       include "unusual_usbat.h"
 200         { }             /* Terminating entry */
 201 };
 202
 203 #undef UNUSUAL_DEV
 204
 205 /*
 206  * Convenience function to produce an ATA read/write sectors command
 207  * Use cmd=0x20 for read, cmd=0x30 for write
 208  */
 209 static void usbat_pack_ata_sector_cmd(unsigned char *buf,
 210                                         unsigned char thistime,
 211                                         u32 sector, unsigned char cmd)
 212 {
 213         buf[0] = 0;
 214         buf[1] = thistime;
 215         buf[2] = sector & 0xFF;
 216         buf[3] = (sector >>  8) & 0xFF;
 217         buf[4] = (sector >> 16) & 0xFF;
 218         buf[5] = 0xE0 | ((sector >> 24) & 0x0F);
 219         buf[6] = cmd;
 220 }
 221
 222 /*
 223  * Convenience function to get the device type (flash or hp8200)
 224  */
 225 static int usbat_get_device_type(struct us_data *us)
 226 {
 227         return ((struct usbat_info*)us->extra)->devicetype;
 228 }
 229
 230 /*
 231  * Read a register from the device
 232  */
 233 static int usbat_read(struct us_data *us,
 234                       unsigned char access,
 235                       unsigned char reg,
 236                       unsigned char *content)
 237 {
 238         return usb_stor_ctrl_transfer(us,
 239                 us->recv_ctrl_pipe,
 240                 access | USBAT_CMD_READ_REG,
 241                 0xC0,
 242                 (u16)reg,
 243                 0,
 244                 content,
 245                 1);
 246 }
 247
 248 /*
 249  * Write to a register on the device
 250  */
 251 static int usbat_write(struct us_data *us,
 252                        unsigned char access,
 253                        unsigned char reg,
 254                        unsigned char content)
 255 {
 256         return usb_stor_ctrl_transfer(us,
 257                 us->send_ctrl_pipe,
 258                 access | USBAT_CMD_WRITE_REG,
 259                 0x40,
 260                 short_pack(reg, content),
 261                 0,
 262                 NULL,
 263                 0);
 264 }
 265
 266 /*
 267  * Convenience function to perform a bulk read
 268  */
 269 static int usbat_bulk_read(struct us_data *us,
 270                            void* buf,
 271                            unsigned int len,
 272                            int use_sg)
 273 {
 274         if (len == 0)
 275                 return USB_STOR_XFER_GOOD;
 276
 277         usb_stor_dbg(us, "len = %d\n", len);
 278         return usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe, buf, len, use_sg, NULL);
 279 }
 280
 281 /*
 282  * Convenience function to perform a bulk write
 283  */
 284 static int usbat_bulk_write(struct us_data *us,
 285                             void* buf,
 286                             unsigned int len,
 287                             int use_sg)
 288 {
 289         if (len == 0)
 290                 return USB_STOR_XFER_GOOD;
 291
 292         usb_stor_dbg(us, "len = %d\n", len);
 293         return usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe, buf, len, use_sg, NULL);
 294 }
 295
 296 /*
 297  * Some USBAT-specific commands can only be executed over a command transport
 298  * This transport allows one (len=8) or two (len=16) vendor-specific commands
 299  * to be executed.
 300  */
 301 static int usbat_execute_command(struct us_data *us,
 302                                                                  unsigned char *commands,
 303                                                                  unsigned int len)
 304 {
 305         return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
 306                                                                   USBAT_CMD_EXEC_CMD, 0x40, 0, 0,
 307                                                                   commands, len);
 308 }
 309
 310 /*
 311  * Read the status register
 312  */
 313 static int usbat_get_status(struct us_data *us, unsigned char *status)
 314 {
 315         int rc;
 316         rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status);
 317
 318         usb_stor_dbg(us, "0x%02X\n", *status);
 319         return rc;
 320 }
 321
 322 /*
 323  * Check the device status
 324  */
 325 static int usbat_check_status(struct us_data *us)
 326 {
 327         unsigned char *reply = us->iobuf;
 328         int rc;
 329
 330         rc = usbat_get_status(us, reply);
 331         if (rc != USB_STOR_XFER_GOOD)
 332                 return USB_STOR_TRANSPORT_FAILED;
 333
 334         /* error/check condition (0x51 is ok) */
 335         if (*reply & 0x01 && *reply != 0x51)
 336                 return USB_STOR_TRANSPORT_FAILED;
 337
 338         /* device fault */
 339         if (*reply & 0x20)
 340                 return USB_STOR_TRANSPORT_FAILED;
 341
 342         return USB_STOR_TRANSPORT_GOOD;
 343 }
 344
 345 /*
 346  * Stores critical information in internal registers in preparation for the execution
 347  * of a conditional usbat_read_blocks or usbat_write_blocks call.
 348  */
 349 static int usbat_set_shuttle_features(struct us_data *us,
 350                                       unsigned char external_trigger,
 351                                       unsigned char epp_control,
 352                                       unsigned char mask_byte,
 353                                       unsigned char test_pattern,
 354                                       unsigned char subcountH,
 355                                       unsigned char subcountL)
 356 {
 357         unsigned char *command = us->iobuf;
 358
 359         command[0] = 0x40;
 360         command[1] = USBAT_CMD_SET_FEAT;
 361
 362         /*
 363          * The only bit relevant to ATA access is bit 6
 364          * which defines 8 bit data access (set) or 16 bit (unset)
 365          */
 366         command[2] = epp_control;
 367
 368         /*
 369          * If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
 370          * ET1 and ET2 define an external event to be checked for on event of a
 371          * _read_blocks or _write_blocks operation. The read/write will not take
 372          * place unless the defined trigger signal is active.
 373          */
 374         command[3] = external_trigger;
 375
 376         /*
 377          * The resultant byte of the mask operation (see mask_byte) is compared for
 378          * equivalence with this test pattern. If equal, the read/write will take
 379          * place.
 380          */
 381         command[4] = test_pattern;
 382
 383         /*
 384          * This value is logically ANDed with the status register field specified
 385          * in the read/write command.
 386          */
 387         command[5] = mask_byte;
 388
 389         /*
 390          * If ALQ is set in the qualifier, this field contains the address of the
 391          * registers where the byte count should be read for transferring the data.
 392          * If ALQ is not set, then this field contains the number of bytes to be
 393          * transferred.
 394          */
 395         command[6] = subcountL;
 396         command[7] = subcountH;
 397
 398         return usbat_execute_command(us, command, 8);
 399 }
 400
 401 /*
 402  * Block, waiting for an ATA device to become not busy or to report
 403  * an error condition.
 404  */
 405 static int usbat_wait_not_busy(struct us_data *us, int minutes)
 406 {
 407         int i;
 408         int result;
 409         unsigned char *status = us->iobuf;
 410
 411         /* Synchronizing cache on a CDR could take a heck of a long time,
 412          * but probably not more than 10 minutes or so. On the other hand,
 413          * doing a full blank on a CDRW at speed 1 will take about 75
 414          * minutes!
 415          */
 416
 417         for (i=0; i<1200+minutes*60; i++) {
 418
 419                 result = usbat_get_status(us, status);
 420
 421                 if (result!=USB_STOR_XFER_GOOD)
 422                         return USB_STOR_TRANSPORT_ERROR;
 423                 if (*status & 0x01) { /* check condition */
 424                         result = usbat_read(us, USBAT_ATA, 0x10, status);
 425                         return USB_STOR_TRANSPORT_FAILED;
 426                 }
 427                 if (*status & 0x20) /* device fault */
 428                         return USB_STOR_TRANSPORT_FAILED;
 429
 430                 if ((*status & 0x80)==0x00) { /* not busy */
 431                         usb_stor_dbg(us, "Waited not busy for %d steps\n", i);
 432                         return USB_STOR_TRANSPORT_GOOD;
 433                 }
 434
 435                 if (i<500)
 436                         msleep(10); /* 5 seconds */
 437                 else if (i<700)
 438                         msleep(50); /* 10 seconds */
 439                 else if (i<1200)
 440                         msleep(100); /* 50 seconds */
 441                 else
 442                         msleep(1000); /* X minutes */
 443         }
 444
 445         usb_stor_dbg(us, "Waited not busy for %d minutes, timing out\n",
 446                      minutes);
 447         return USB_STOR_TRANSPORT_FAILED;
 448 }
 449
 450 /*
 451  * Read block data from the data register
 452  */
 453 static int usbat_read_block(struct us_data *us,
 454                             void* buf,
 455                             unsigned short len,
 456                             int use_sg)
 457 {
 458         int result;
 459         unsigned char *command = us->iobuf;
 460
 461         if (!len)
 462                 return USB_STOR_TRANSPORT_GOOD;
 463
 464         command[0] = 0xC0;
 465         command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK;
 466         command[2] = USBAT_ATA_DATA;
 467         command[3] = 0;
 468         command[4] = 0;
 469         command[5] = 0;
 470         command[6] = LSB_of(len);
 471         command[7] = MSB_of(len);
 472
 473         result = usbat_execute_command(us, command, 8);
 474         if (result != USB_STOR_XFER_GOOD)
 475                 return USB_STOR_TRANSPORT_ERROR;
 476
 477         result = usbat_bulk_read(us, buf, len, use_sg);
 478         return (result == USB_STOR_XFER_GOOD ?
 479                         USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
 480 }
 481
 482 /*
 483  * Write block data via the data register
 484  */
 485 static int usbat_write_block(struct us_data *us,
 486                              unsigned char access,
 487                              void* buf,
 488                              unsigned short len,
 489                              int minutes,
 490                              int use_sg)
 491 {
 492         int result;
 493         unsigned char *command = us->iobuf;
 494
 495         if (!len)
 496                 return USB_STOR_TRANSPORT_GOOD;
 497
 498         command[0] = 0x40;
 499         command[1] = access | USBAT_CMD_WRITE_BLOCK;
 500         command[2] = USBAT_ATA_DATA;
 501         command[3] = 0;
 502         command[4] = 0;
 503         command[5] = 0;
 504         command[6] = LSB_of(len);
 505         command[7] = MSB_of(len);
 506
 507         result = usbat_execute_command(us, command, 8);
 508
 509         if (result != USB_STOR_XFER_GOOD)
 510                 return USB_STOR_TRANSPORT_ERROR;
 511
 512         result = usbat_bulk_write(us, buf, len, use_sg);
 513         if (result != USB_STOR_XFER_GOOD)
 514                 return USB_STOR_TRANSPORT_ERROR;
 515
 516         return usbat_wait_not_busy(us, minutes);
 517 }
 518
 519 /*
 520  * Process read and write requests
 521  */
 522 static int usbat_hp8200e_rw_block_test(struct us_data *us,
 523                                        unsigned char access,
 524                                        unsigned char *registers,
 525                                        unsigned char *data_out,
 526                                        unsigned short num_registers,
 527                                        unsigned char data_reg,
 528                                        unsigned char status_reg,
 529                                        unsigned char timeout,
 530                                        unsigned char qualifier,
 531                                        int direction,
 532                                        void *buf,
 533                                        unsigned short len,
 534                                        int use_sg,
 535                                        int minutes)
 536 {
 537         int result;
 538         unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
 539                         us->recv_bulk_pipe : us->send_bulk_pipe;
 540
 541         unsigned char *command = us->iobuf;
 542         int i, j;
 543         int cmdlen;
 544         unsigned char *data = us->iobuf;
 545         unsigned char *status = us->iobuf;
 546
 547         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 548
 549         for (i=0; i<20; i++) {
 550
 551                 /*
 552                  * The first time we send the full command, which consists
 553                  * of downloading the SCSI command followed by downloading
 554                  * the data via a write-and-test.  Any other time we only
 555                  * send the command to download the data -- the SCSI command
 556                  * is still 'active' in some sense in the device.
 557                  *
 558                  * We're only going to try sending the data 10 times. After
 559                  * that, we just return a failure.
 560                  */
 561
 562                 if (i==0) {
 563                         cmdlen = 16;
 564                         /*
 565                          * Write to multiple registers
 566                          * Not really sure the 0x07, 0x17, 0xfc, 0xe7 is
 567                          * necessary here, but that's what came out of the
 568                          * trace every single time.
 569                          */
 570                         command[0] = 0x40;
 571                         command[1] = access | USBAT_CMD_WRITE_REGS;
 572                         command[2] = 0x07;
 573                         command[3] = 0x17;
 574                         command[4] = 0xFC;
 575                         command[5] = 0xE7;
 576                         command[6] = LSB_of(num_registers*2);
 577                         command[7] = MSB_of(num_registers*2);
 578                 } else
 579                         cmdlen = 8;
 580
 581                 /* Conditionally read or write blocks */
 582                 command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
 583                 command[cmdlen-7] = access |
 584                                 (direction==DMA_TO_DEVICE ?
 585                                  USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK);
 586                 command[cmdlen-6] = data_reg;
 587                 command[cmdlen-5] = status_reg;
 588                 command[cmdlen-4] = timeout;
 589                 command[cmdlen-3] = qualifier;
 590                 command[cmdlen-2] = LSB_of(len);
 591                 command[cmdlen-1] = MSB_of(len);
 592
 593                 result = usbat_execute_command(us, command, cmdlen);
 594
 595                 if (result != USB_STOR_XFER_GOOD)
 596                         return USB_STOR_TRANSPORT_ERROR;
 597
 598                 if (i==0) {
 599
 600                         for (j=0; j<num_registers; j++) {
 601                                 data[j<<1] = registers[j];
 602                                 data[1+(j<<1)] = data_out[j];
 603                         }
 604
 605                         result = usbat_bulk_write(us, data, num_registers*2, 0);
 606                         if (result != USB_STOR_XFER_GOOD)
 607                                 return USB_STOR_TRANSPORT_ERROR;
 608
 609                 }
 610
 611                 result = usb_stor_bulk_transfer_sg(us,
 612                         pipe, buf, len, use_sg, NULL);
 613
 614                 /*
 615                  * If we get a stall on the bulk download, we'll retry
 616                  * the bulk download -- but not the SCSI command because
 617                  * in some sense the SCSI command is still 'active' and
 618                  * waiting for the data. Don't ask me why this should be;
 619                  * I'm only following what the Windoze driver did.
 620                  *
 621                  * Note that a stall for the test-and-read/write command means
 622                  * that the test failed. In this case we're testing to make
 623                  * sure that the device is error-free
 624                  * (i.e. bit 0 -- CHK -- of status is 0). The most likely
 625                  * hypothesis is that the USBAT chip somehow knows what
 626                  * the device will accept, but doesn't give the device any
 627                  * data until all data is received. Thus, the device would
 628                  * still be waiting for the first byte of data if a stall
 629                  * occurs, even if the stall implies that some data was
 630                  * transferred.
 631                  */
 632
 633                 if (result == USB_STOR_XFER_SHORT ||
 634                                 result == USB_STOR_XFER_STALLED) {
 635
 636                         /*
 637                          * If we're reading and we stalled, then clear
 638                          * the bulk output pipe only the first time.
 639                          */
 640
 641                         if (direction==DMA_FROM_DEVICE && i==0) {
 642                                 if (usb_stor_clear_halt(us,
 643                                                 us->send_bulk_pipe) < 0)
 644                                         return USB_STOR_TRANSPORT_ERROR;
 645                         }
 646
 647                         /*
 648                          * Read status: is the device angry, or just busy?
 649                          */
 650
 651                         result = usbat_read(us, USBAT_ATA,
 652                                 direction==DMA_TO_DEVICE ?
 653                                         USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS,
 654                                 status);
 655
 656                         if (result!=USB_STOR_XFER_GOOD)
 657                                 return USB_STOR_TRANSPORT_ERROR;
 658                         if (*status & 0x01) /* check condition */
 659                                 return USB_STOR_TRANSPORT_FAILED;
 660                         if (*status & 0x20) /* device fault */
 661                                 return USB_STOR_TRANSPORT_FAILED;
 662
 663                         usb_stor_dbg(us, "Redoing %s\n",
 664                                      direction == DMA_TO_DEVICE
 665                                      ? "write" : "read");
 666
 667                 } else if (result != USB_STOR_XFER_GOOD)
 668                         return USB_STOR_TRANSPORT_ERROR;
 669                 else
 670                         return usbat_wait_not_busy(us, minutes);
 671
 672         }
 673
 674         usb_stor_dbg(us, "Bummer! %s bulk data 20 times failed\n",
 675                      direction == DMA_TO_DEVICE ? "Writing" : "Reading");
 676
 677         return USB_STOR_TRANSPORT_FAILED;
 678 }
 679
 680 /*
 681  * Write to multiple registers:
 682  * Allows us to write specific data to any registers. The data to be written
 683  * gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN
 684  * which gets sent through bulk out.
 685  * Not designed for large transfers of data!
 686  */
 687 static int usbat_multiple_write(struct us_data *us,
 688                                 unsigned char *registers,
 689                                 unsigned char *data_out,
 690                                 unsigned short num_registers)
 691 {
 692         int i, result;
 693         unsigned char *data = us->iobuf;
 694         unsigned char *command = us->iobuf;
 695
 696         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 697
 698         /* Write to multiple registers, ATA access */
 699         command[0] = 0x40;
 700         command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
 701
 702         /* No relevance */
 703         command[2] = 0;
 704         command[3] = 0;
 705         command[4] = 0;
 706         command[5] = 0;
 707
 708         /* Number of bytes to be transferred (incl. addresses and data) */
 709         command[6] = LSB_of(num_registers*2);
 710         command[7] = MSB_of(num_registers*2);
 711
 712         /* The setup command */
 713         result = usbat_execute_command(us, command, 8);
 714         if (result != USB_STOR_XFER_GOOD)
 715                 return USB_STOR_TRANSPORT_ERROR;
 716
 717         /* Create the reg/data, reg/data sequence */
 718         for (i=0; i<num_registers; i++) {
 719                 data[i<<1] = registers[i];
 720                 data[1+(i<<1)] = data_out[i];
 721         }
 722
 723         /* Send the data */
 724         result = usbat_bulk_write(us, data, num_registers*2, 0);
 725         if (result != USB_STOR_XFER_GOOD)
 726                 return USB_STOR_TRANSPORT_ERROR;
 727
 728         if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
 729                 return usbat_wait_not_busy(us, 0);
 730         else
 731                 return USB_STOR_TRANSPORT_GOOD;
 732 }
 733
 734 /*
 735  * Conditionally read blocks from device:
 736  * Allows us to read blocks from a specific data register, based upon the
 737  * condition that a status register can be successfully masked with a status
 738  * qualifier. If this condition is not initially met, the read will wait
 739  * up until a maximum amount of time has elapsed, as specified by timeout.
 740  * The read will start when the condition is met, otherwise the command aborts.
 741  *
 742  * The qualifier defined here is not the value that is masked, it defines
 743  * conditions for the write to take place. The actual masked qualifier (and
 744  * other related details) are defined beforehand with _set_shuttle_features().
 745  */
 746 static int usbat_read_blocks(struct us_data *us,
 747                              void* buffer,
 748                              int len,
 749                              int use_sg)
 750 {
 751         int result;
 752         unsigned char *command = us->iobuf;
 753
 754         command[0] = 0xC0;
 755         command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
 756         command[2] = USBAT_ATA_DATA;
 757         command[3] = USBAT_ATA_STATUS;
 758         command[4] = 0xFD; /* Timeout (ms); */
 759         command[5] = USBAT_QUAL_FCQ;
 760         command[6] = LSB_of(len);
 761         command[7] = MSB_of(len);
 762
 763         /* Multiple block read setup command */
 764         result = usbat_execute_command(us, command, 8);
 765         if (result != USB_STOR_XFER_GOOD)
 766                 return USB_STOR_TRANSPORT_FAILED;
 767
 768         /* Read the blocks we just asked for */
 769         result = usbat_bulk_read(us, buffer, len, use_sg);
 770         if (result != USB_STOR_XFER_GOOD)
 771                 return USB_STOR_TRANSPORT_FAILED;
 772
 773         return USB_STOR_TRANSPORT_GOOD;
 774 }
 775
 776 /*
 777  * Conditionally write blocks to device:
 778  * Allows us to write blocks to a specific data register, based upon the
 779  * condition that a status register can be successfully masked with a status
 780  * qualifier. If this condition is not initially met, the write will wait
 781  * up until a maximum amount of time has elapsed, as specified by timeout.
 782  * The read will start when the condition is met, otherwise the command aborts.
 783  *
 784  * The qualifier defined here is not the value that is masked, it defines
 785  * conditions for the write to take place. The actual masked qualifier (and
 786  * other related details) are defined beforehand with _set_shuttle_features().
 787  */
 788 static int usbat_write_blocks(struct us_data *us,
 789                               void* buffer,
 790                               int len,
 791                               int use_sg)
 792 {
 793         int result;
 794         unsigned char *command = us->iobuf;
 795
 796         command[0] = 0x40;
 797         command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
 798         command[2] = USBAT_ATA_DATA;
 799         command[3] = USBAT_ATA_STATUS;
 800         command[4] = 0xFD; /* Timeout (ms) */
 801         command[5] = USBAT_QUAL_FCQ;
 802         command[6] = LSB_of(len);
 803         command[7] = MSB_of(len);
 804
 805         /* Multiple block write setup command */
 806         result = usbat_execute_command(us, command, 8);
 807         if (result != USB_STOR_XFER_GOOD)
 808                 return USB_STOR_TRANSPORT_FAILED;
 809
 810         /* Write the data */
 811         result = usbat_bulk_write(us, buffer, len, use_sg);
 812         if (result != USB_STOR_XFER_GOOD)
 813                 return USB_STOR_TRANSPORT_FAILED;
 814
 815         return USB_STOR_TRANSPORT_GOOD;
 816 }
 817
 818 /*
 819  * Read the User IO register
 820  */
 821 static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
 822 {
 823         int result;
 824
 825         result = usb_stor_ctrl_transfer(us,
 826                 us->recv_ctrl_pipe,
 827                 USBAT_CMD_UIO,
 828                 0xC0,
 829                 0,
 830                 0,
 831                 data_flags,
 832                 USBAT_UIO_READ);
 833
 834         usb_stor_dbg(us, "UIO register reads %02X\n", *data_flags);
 835
 836         return result;
 837 }
 838
 839 /*
 840  * Write to the User IO register
 841  */
 842 static int usbat_write_user_io(struct us_data *us,
 843                                unsigned char enable_flags,
 844                                unsigned char data_flags)
 845 {
 846         return usb_stor_ctrl_transfer(us,
 847                 us->send_ctrl_pipe,
 848                 USBAT_CMD_UIO,
 849                 0x40,
 850                 short_pack(enable_flags, data_flags),
 851                 0,
 852                 NULL,
 853                 USBAT_UIO_WRITE);
 854 }
 855
 856 /*
 857  * Reset the device
 858  * Often needed on media change.
 859  */
 860 static int usbat_device_reset(struct us_data *us)
 861 {
 862         int rc;
 863
 864         /*
 865          * Reset peripheral, enable peripheral control signals
 866          * (bring reset signal up)
 867          */
 868         rc = usbat_write_user_io(us,
 869                                                          USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
 870                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
 871         if (rc != USB_STOR_XFER_GOOD)
 872                 return USB_STOR_TRANSPORT_ERROR;
 873
 874         /*
 875          * Enable peripheral control signals
 876          * (bring reset signal down)
 877          */
 878         rc = usbat_write_user_io(us,
 879                                                          USBAT_UIO_OE1  | USBAT_UIO_OE0,
 880                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
 881         if (rc != USB_STOR_XFER_GOOD)
 882                 return USB_STOR_TRANSPORT_ERROR;
 883
 884         return USB_STOR_TRANSPORT_GOOD;
 885 }
 886
 887 /*
 888  * Enable card detect
 889  */
 890 static int usbat_device_enable_cdt(struct us_data *us)
 891 {
 892         int rc;
 893
 894         /* Enable peripheral control signals and card detect */
 895         rc = usbat_write_user_io(us,
 896                                                          USBAT_UIO_ACKD | USBAT_UIO_OE1  | USBAT_UIO_OE0,
 897                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
 898         if (rc != USB_STOR_XFER_GOOD)
 899                 return USB_STOR_TRANSPORT_ERROR;
 900
 901         return USB_STOR_TRANSPORT_GOOD;
 902 }
 903
 904 /*
 905  * Determine if media is present.
 906  */
 907 static int usbat_flash_check_media_present(struct us_data *us,
 908                                            unsigned char *uio)
 909 {
 910         if (*uio & USBAT_UIO_UI0) {
 911                 usb_stor_dbg(us, "no media detected\n");
 912                 return USBAT_FLASH_MEDIA_NONE;
 913         }
 914
 915         return USBAT_FLASH_MEDIA_CF;
 916 }
 917
 918 /*
 919  * Determine if media has changed since last operation
 920  */
 921 static int usbat_flash_check_media_changed(struct us_data *us,
 922                                            unsigned char *uio)
 923 {
 924         if (*uio & USBAT_UIO_0) {
 925                 usb_stor_dbg(us, "media change detected\n");
 926                 return USBAT_FLASH_MEDIA_CHANGED;
 927         }
 928
 929         return USBAT_FLASH_MEDIA_SAME;
 930 }
 931
 932 /*
 933  * Check for media change / no media and handle the situation appropriately
 934  */
 935 static int usbat_flash_check_media(struct us_data *us,
 936                                    struct usbat_info *info)
 937 {
 938         int rc;
 939         unsigned char *uio = us->iobuf;
 940
 941         rc = usbat_read_user_io(us, uio);
 942         if (rc != USB_STOR_XFER_GOOD)
 943                 return USB_STOR_TRANSPORT_ERROR;
 944
 945         /* Check for media existence */
 946         rc = usbat_flash_check_media_present(us, uio);
 947         if (rc == USBAT_FLASH_MEDIA_NONE) {
 948                 info->sense_key = 0x02;
 949                 info->sense_asc = 0x3A;
 950                 info->sense_ascq = 0x00;
 951                 return USB_STOR_TRANSPORT_FAILED;
 952         }
 953
 954         /* Check for media change */
 955         rc = usbat_flash_check_media_changed(us, uio);
 956         if (rc == USBAT_FLASH_MEDIA_CHANGED) {
 957
 958                 /* Reset and re-enable card detect */
 959                 rc = usbat_device_reset(us);
 960                 if (rc != USB_STOR_TRANSPORT_GOOD)
 961                         return rc;
 962                 rc = usbat_device_enable_cdt(us);
 963                 if (rc != USB_STOR_TRANSPORT_GOOD)
 964                         return rc;
 965
 966                 msleep(50);
 967
 968                 rc = usbat_read_user_io(us, uio);
 969                 if (rc != USB_STOR_XFER_GOOD)
 970                         return USB_STOR_TRANSPORT_ERROR;
 971
 972                 info->sense_key = UNIT_ATTENTION;
 973                 info->sense_asc = 0x28;
 974                 info->sense_ascq = 0x00;
 975                 return USB_STOR_TRANSPORT_FAILED;
 976         }
 977
 978         return USB_STOR_TRANSPORT_GOOD;
 979 }
 980
 981 /*
 982  * Determine whether we are controlling a flash-based reader/writer,
 983  * or a HP8200-based CD drive.
 984  * Sets transport functions as appropriate.
 985  */
 986 static int usbat_identify_device(struct us_data *us,
 987                                  struct usbat_info *info)
 988 {
 989         int rc;
 990         unsigned char status;
 991
 992         if (!us || !info)
 993                 return USB_STOR_TRANSPORT_ERROR;
 994
 995         rc = usbat_device_reset(us);
 996         if (rc != USB_STOR_TRANSPORT_GOOD)
 997                 return rc;
 998         msleep(500);
 999
1000         /*
1001          * In attempt to distinguish between HP CDRW's and Flash readers, we now
1002          * execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash
1003          * readers), this command should fail with error. On ATAPI devices (i.e.
1004          * CDROM drives), it should succeed.
1005          */
1006         rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1);
1007         if (rc != USB_STOR_XFER_GOOD)
1008                 return USB_STOR_TRANSPORT_ERROR;
1009
1010         rc = usbat_get_status(us, &status);
1011         if (rc != USB_STOR_XFER_GOOD)
1012                 return USB_STOR_TRANSPORT_ERROR;
1013
1014         /* Check for error bit, or if the command 'fell through' */
1015         if (status == 0xA1 || !(status & 0x01)) {
1016                 /* Device is HP 8200 */
1017                 usb_stor_dbg(us, "Detected HP8200 CDRW\n");
1018                 info->devicetype = USBAT_DEV_HP8200;
1019         } else {
1020                 /* Device is a CompactFlash reader/writer */
1021                 usb_stor_dbg(us, "Detected Flash reader/writer\n");
1022                 info->devicetype = USBAT_DEV_FLASH;
1023         }
1024
1025         return USB_STOR_TRANSPORT_GOOD;
1026 }
1027
1028 /*
1029  * Set the transport function based on the device type
1030  */
1031 static int usbat_set_transport(struct us_data *us,
1032                                struct usbat_info *info,
1033                                int devicetype)
1034 {
1035
1036         if (!info->devicetype)
1037                 info->devicetype = devicetype;
1038
1039         if (!info->devicetype)
1040                 usbat_identify_device(us, info);
1041
1042         switch (info->devicetype) {
1043         default:
1044                 return USB_STOR_TRANSPORT_ERROR;
1045
1046         case  USBAT_DEV_HP8200:
1047                 us->transport = usbat_hp8200e_transport;
1048                 break;
1049
1050         case USBAT_DEV_FLASH:
1051                 us->transport = usbat_flash_transport;
1052                 break;
1053         }
1054
1055         return 0;
1056 }
1057
1058 /*
1059  * Read the media capacity
1060  */
1061 static int usbat_flash_get_sector_count(struct us_data *us,
1062                                         struct usbat_info *info)
1063 {
1064         unsigned char registers[3] = {
1065                 USBAT_ATA_SECCNT,
1066                 USBAT_ATA_DEVICE,
1067                 USBAT_ATA_CMD,
1068         };
1069         unsigned char  command[3] = { 0x01, 0xA0, 0xEC };
1070         unsigned char *reply;
1071         unsigned char status;
1072         int rc;
1073
1074         if (!us || !info)
1075                 return USB_STOR_TRANSPORT_ERROR;
1076
1077         reply = kmalloc(512, GFP_NOIO);
1078         if (!reply)
1079                 return USB_STOR_TRANSPORT_ERROR;
1080
1081         /* ATA command : IDENTIFY DEVICE */
1082         rc = usbat_multiple_write(us, registers, command, 3);
1083         if (rc != USB_STOR_XFER_GOOD) {
1084                 usb_stor_dbg(us, "Gah! identify_device failed\n");
1085                 rc = USB_STOR_TRANSPORT_ERROR;
1086                 goto leave;
1087         }
1088
1089         /* Read device status */
1090         if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
1091                 rc = USB_STOR_TRANSPORT_ERROR;
1092                 goto leave;
1093         }
1094
1095         msleep(100);
1096
1097         /* Read the device identification data */
1098         rc = usbat_read_block(us, reply, 512, 0);
1099         if (rc != USB_STOR_TRANSPORT_GOOD)
1100                 goto leave;
1101
1102         info->sectors = ((u32)(reply[117]) << 24) |
1103                 ((u32)(reply[116]) << 16) |
1104                 ((u32)(reply[115]) <<  8) |
1105                 ((u32)(reply[114])      );
1106
1107         rc = USB_STOR_TRANSPORT_GOOD;
1108
1109  leave:
1110         kfree(reply);
1111         return rc;
1112 }
1113
1114 /*
1115  * Read data from device
1116  */
1117 static int usbat_flash_read_data(struct us_data *us,
1118                                                                  struct usbat_info *info,
1119                                                                  u32 sector,
1120                                                                  u32 sectors)
1121 {
1122         unsigned char registers[7] = {
1123                 USBAT_ATA_FEATURES,
1124                 USBAT_ATA_SECCNT,
1125                 USBAT_ATA_SECNUM,
1126                 USBAT_ATA_LBA_ME,
1127                 USBAT_ATA_LBA_HI,
1128                 USBAT_ATA_DEVICE,
1129                 USBAT_ATA_STATUS,
1130         };
1131         unsigned char command[7];
1132         unsigned char *buffer;
1133         unsigned char  thistime;
1134         unsigned int totallen, alloclen;
1135         int len, result;
1136         unsigned int sg_offset = 0;
1137         struct scatterlist *sg = NULL;
1138
1139         result = usbat_flash_check_media(us, info);
1140         if (result != USB_STOR_TRANSPORT_GOOD)
1141                 return result;
1142
1143         /*
1144          * we're working in LBA mode.  according to the ATA spec,
1145          * we can support up to 28-bit addressing.  I don't know if Jumpshot
1146          * supports beyond 24-bit addressing.  It's kind of hard to test
1147          * since it requires > 8GB CF card.
1148          */
1149
1150         if (sector > 0x0FFFFFFF)
1151                 return USB_STOR_TRANSPORT_ERROR;
1152
1153         totallen = sectors * info->ssize;
1154
1155         /*
1156          * Since we don't read more than 64 KB at a time, we have to create
1157          * a bounce buffer and move the data a piece at a time between the
1158          * bounce buffer and the actual transfer buffer.
1159          */
1160
1161         alloclen = min(totallen, 65536u);
1162         buffer = kmalloc(alloclen, GFP_NOIO);
1163         if (buffer == NULL)
1164                 return USB_STOR_TRANSPORT_ERROR;
1165
1166         do {
1167                 /*
1168                  * loop, never allocate or transfer more than 64k at once
1169                  * (min(128k, 255*info->ssize) is the real limit)
1170                  */
1171                 len = min(totallen, alloclen);
1172                 thistime = (len / info->ssize) & 0xff;
1173
1174                 /* ATA command 0x20 (READ SECTORS) */
1175                 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20);
1176
1177                 /* Write/execute ATA read command */
1178                 result = usbat_multiple_write(us, registers, command, 7);
1179                 if (result != USB_STOR_TRANSPORT_GOOD)
1180                         goto leave;
1181
1182                 /* Read the data we just requested */
1183                 result = usbat_read_blocks(us, buffer, len, 0);
1184                 if (result != USB_STOR_TRANSPORT_GOOD)
1185                         goto leave;
1186
1187                 usb_stor_dbg(us, "%d bytes\n", len);
1188
1189                 /* Store the data in the transfer buffer */
1190                 usb_stor_access_xfer_buf(buffer, len, us->srb,
1191                                          &sg, &sg_offset, TO_XFER_BUF);
1192
1193                 sector += thistime;
1194                 totallen -= len;
1195         } while (totallen > 0);
1196
1197         kfree(buffer);
1198         return USB_STOR_TRANSPORT_GOOD;
1199
1200 leave:
1201         kfree(buffer);
1202         return USB_STOR_TRANSPORT_ERROR;
1203 }
1204
1205 /*
1206  * Write data to device
1207  */
1208 static int usbat_flash_write_data(struct us_data *us,
1209                                                                   struct usbat_info *info,
1210                                                                   u32 sector,
1211                                                                   u32 sectors)
1212 {
1213         unsigned char registers[7] = {
1214                 USBAT_ATA_FEATURES,
1215                 USBAT_ATA_SECCNT,
1216                 USBAT_ATA_SECNUM,
1217                 USBAT_ATA_LBA_ME,
1218                 USBAT_ATA_LBA_HI,
1219                 USBAT_ATA_DEVICE,
1220                 USBAT_ATA_STATUS,
1221         };
1222         unsigned char command[7];
1223         unsigned char *buffer;
1224         unsigned char  thistime;
1225         unsigned int totallen, alloclen;
1226         int len, result;
1227         unsigned int sg_offset = 0;
1228         struct scatterlist *sg = NULL;
1229
1230         result = usbat_flash_check_media(us, info);
1231         if (result != USB_STOR_TRANSPORT_GOOD)
1232                 return result;
1233
1234         /*
1235          * we're working in LBA mode.  according to the ATA spec,
1236          * we can support up to 28-bit addressing.  I don't know if the device
1237          * supports beyond 24-bit addressing.  It's kind of hard to test
1238          * since it requires > 8GB media.
1239          */
1240
1241         if (sector > 0x0FFFFFFF)
1242                 return USB_STOR_TRANSPORT_ERROR;
1243
1244         totallen = sectors * info->ssize;
1245
1246         /*
1247          * Since we don't write more than 64 KB at a time, we have to create
1248          * a bounce buffer and move the data a piece at a time between the
1249          * bounce buffer and the actual transfer buffer.
1250          */
1251
1252         alloclen = min(totallen, 65536u);
1253         buffer = kmalloc(alloclen, GFP_NOIO);
1254         if (buffer == NULL)
1255                 return USB_STOR_TRANSPORT_ERROR;
1256
1257         do {
1258                 /*
1259                  * loop, never allocate or transfer more than 64k at once
1260                  * (min(128k, 255*info->ssize) is the real limit)
1261                  */
1262                 len = min(totallen, alloclen);
1263                 thistime = (len / info->ssize) & 0xff;
1264
1265                 /* Get the data from the transfer buffer */
1266                 usb_stor_access_xfer_buf(buffer, len, us->srb,
1267                                          &sg, &sg_offset, FROM_XFER_BUF);
1268
1269                 /* ATA command 0x30 (WRITE SECTORS) */
1270                 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
1271
1272                 /* Write/execute ATA write command */
1273                 result = usbat_multiple_write(us, registers, command, 7);
1274                 if (result != USB_STOR_TRANSPORT_GOOD)
1275                         goto leave;
1276
1277                 /* Write the data */
1278                 result = usbat_write_blocks(us, buffer, len, 0);
1279                 if (result != USB_STOR_TRANSPORT_GOOD)
1280                         goto leave;
1281
1282                 sector += thistime;
1283                 totallen -= len;
1284         } while (totallen > 0);
1285
1286         kfree(buffer);
1287         return result;
1288
1289 leave:
1290         kfree(buffer);
1291         return USB_STOR_TRANSPORT_ERROR;
1292 }
1293
1294 /*
1295  * Squeeze a potentially huge (> 65535 byte) read10 command into
1296  * a little ( <= 65535 byte) ATAPI pipe
1297  */
1298 static int usbat_hp8200e_handle_read10(struct us_data *us,
1299                                        unsigned char *registers,
1300                                        unsigned char *data,
1301                                        struct scsi_cmnd *srb)
1302 {
1303         int result = USB_STOR_TRANSPORT_GOOD;
1304         unsigned char *buffer;
1305         unsigned int len;
1306         unsigned int sector;
1307         unsigned int sg_offset = 0;
1308         struct scatterlist *sg = NULL;
1309
1310         usb_stor_dbg(us, "transfersize %d\n", srb->transfersize);
1311
1312         if (scsi_bufflen(srb) < 0x10000) {
1313
1314                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1315                         registers, data, 19,
1316                         USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1317                         (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1318                         DMA_FROM_DEVICE,
1319                         scsi_sglist(srb),
1320                         scsi_bufflen(srb), scsi_sg_count(srb), 1);
1321
1322                 return result;
1323         }
1324
1325         /*
1326          * Since we're requesting more data than we can handle in
1327          * a single read command (max is 64k-1), we will perform
1328          * multiple reads, but each read must be in multiples of
1329          * a sector.  Luckily the sector size is in srb->transfersize
1330          * (see linux/drivers/scsi/sr.c).
1331          */
1332
1333         if (data[7+0] == GPCMD_READ_CD) {
1334                 len = short_pack(data[7+9], data[7+8]);
1335                 len <<= 16;
1336                 len |= data[7+7];
1337                 usb_stor_dbg(us, "GPCMD_READ_CD: len %d\n", len);
1338                 srb->transfersize = scsi_bufflen(srb)/len;
1339         }
1340
1341         if (!srb->transfersize)  {
1342                 srb->transfersize = 2048; /* A guess */
1343                 usb_stor_dbg(us, "transfersize 0, forcing %d\n",
1344                              srb->transfersize);
1345         }
1346
1347         /*
1348          * Since we only read in one block at a time, we have to create
1349          * a bounce buffer and move the data a piece at a time between the
1350          * bounce buffer and the actual transfer buffer.
1351          */
1352
1353         len = (65535/srb->transfersize) * srb->transfersize;
1354         usb_stor_dbg(us, "Max read is %d bytes\n", len);
1355         len = min(len, scsi_bufflen(srb));
1356         buffer = kmalloc(len, GFP_NOIO);
1357         if (buffer == NULL) /* bloody hell! */
1358                 return USB_STOR_TRANSPORT_FAILED;
1359         sector = short_pack(data[7+3], data[7+2]);
1360         sector <<= 16;
1361         sector |= short_pack(data[7+5], data[7+4]);
1362         transferred = 0;
1363
1364         while (transferred != scsi_bufflen(srb)) {
1365
1366                 if (len > scsi_bufflen(srb) - transferred)
1367                         len = scsi_bufflen(srb) - transferred;
1368
1369                 data[3] = len&0xFF;       /* (cylL) = expected length (L) */
1370                 data[4] = (len>>8)&0xFF;  /* (cylH) = expected length (H) */
1371
1372                 /* Fix up the SCSI command sector and num sectors */
1373
1374                 data[7+2] = MSB_of(sector>>16); /* SCSI command sector */
1375                 data[7+3] = LSB_of(sector>>16);
1376                 data[7+4] = MSB_of(sector&0xFFFF);
1377                 data[7+5] = LSB_of(sector&0xFFFF);
1378                 if (data[7+0] == GPCMD_READ_CD)
1379                         data[7+6] = 0;
1380                 data[7+7] = MSB_of(len / srb->transfersize); /* SCSI command */
1381                 data[7+8] = LSB_of(len / srb->transfersize); /* num sectors */
1382
1383                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1384                         registers, data, 19,
1385                         USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1386                         (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1387                         DMA_FROM_DEVICE,
1388                         buffer,
1389                         len, 0, 1);
1390
1391                 if (result != USB_STOR_TRANSPORT_GOOD)
1392                         break;
1393
1394                 /* Store the data in the transfer buffer */
1395                 usb_stor_access_xfer_buf(buffer, len, srb,
1396                                  &sg, &sg_offset, TO_XFER_BUF);
1397
1398                 /* Update the amount transferred and the sector number */
1399
1400                 transferred += len;
1401                 sector += len / srb->transfersize;
1402
1403         } /* while transferred != scsi_bufflen(srb) */
1404
1405         kfree(buffer);
1406         return result;
1407 }
1408
1409 static int usbat_select_and_test_registers(struct us_data *us)
1410 {
1411         int selector;
1412         unsigned char *status = us->iobuf;
1413
1414         /* try device = master, then device = slave. */
1415         for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
1416                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
1417                                 USB_STOR_XFER_GOOD)
1418                         return USB_STOR_TRANSPORT_ERROR;
1419
1420                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) !=
1421                                 USB_STOR_XFER_GOOD)
1422                         return USB_STOR_TRANSPORT_ERROR;
1423
1424                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) !=
1425                                 USB_STOR_XFER_GOOD)
1426                         return USB_STOR_TRANSPORT_ERROR;
1427
1428                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1429                                 USB_STOR_XFER_GOOD)
1430                         return USB_STOR_TRANSPORT_ERROR;
1431
1432                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1433                                 USB_STOR_XFER_GOOD)
1434                         return USB_STOR_TRANSPORT_ERROR;
1435
1436                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) !=
1437                                 USB_STOR_XFER_GOOD)
1438                         return USB_STOR_TRANSPORT_ERROR;
1439
1440                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) !=
1441                                 USB_STOR_XFER_GOOD)
1442                         return USB_STOR_TRANSPORT_ERROR;
1443
1444                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1445                                 USB_STOR_XFER_GOOD)
1446                         return USB_STOR_TRANSPORT_ERROR;
1447
1448                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1449                                 USB_STOR_XFER_GOOD)
1450                         return USB_STOR_TRANSPORT_ERROR;
1451         }
1452
1453         return USB_STOR_TRANSPORT_GOOD;
1454 }
1455
1456 /*
1457  * Initialize the USBAT processor and the storage device
1458  */
1459 static int init_usbat(struct us_data *us, int devicetype)
1460 {
1461         int rc;
1462         struct usbat_info *info;
1463         unsigned char subcountH = USBAT_ATA_LBA_HI;
1464         unsigned char subcountL = USBAT_ATA_LBA_ME;
1465         unsigned char *status = us->iobuf;
1466
1467         us->extra = kzalloc(sizeof(struct usbat_info), GFP_NOIO);
1468         if (!us->extra)
1469                 return 1;
1470
1471         info = (struct usbat_info *) (us->extra);
1472
1473         /* Enable peripheral control signals */
1474         rc = usbat_write_user_io(us,
1475                                  USBAT_UIO_OE1 | USBAT_UIO_OE0,
1476                                  USBAT_UIO_EPAD | USBAT_UIO_1);
1477         if (rc != USB_STOR_XFER_GOOD)
1478                 return USB_STOR_TRANSPORT_ERROR;
1479
1480         usb_stor_dbg(us, "INIT 1\n");
1481
1482         msleep(2000);
1483
1484         rc = usbat_read_user_io(us, status);
1485         if (rc != USB_STOR_TRANSPORT_GOOD)
1486                 return rc;
1487
1488         usb_stor_dbg(us, "INIT 2\n");
1489
1490         rc = usbat_read_user_io(us, status);
1491         if (rc != USB_STOR_XFER_GOOD)
1492                 return USB_STOR_TRANSPORT_ERROR;
1493
1494         rc = usbat_read_user_io(us, status);
1495         if (rc != USB_STOR_XFER_GOOD)
1496                 return USB_STOR_TRANSPORT_ERROR;
1497
1498         usb_stor_dbg(us, "INIT 3\n");
1499
1500         rc = usbat_select_and_test_registers(us);
1501         if (rc != USB_STOR_TRANSPORT_GOOD)
1502                 return rc;
1503
1504         usb_stor_dbg(us, "INIT 4\n");
1505
1506         rc = usbat_read_user_io(us, status);
1507         if (rc != USB_STOR_XFER_GOOD)
1508                 return USB_STOR_TRANSPORT_ERROR;
1509
1510         usb_stor_dbg(us, "INIT 5\n");
1511
1512         /* Enable peripheral control signals and card detect */
1513         rc = usbat_device_enable_cdt(us);
1514         if (rc != USB_STOR_TRANSPORT_GOOD)
1515                 return rc;
1516
1517         usb_stor_dbg(us, "INIT 6\n");
1518
1519         rc = usbat_read_user_io(us, status);
1520         if (rc != USB_STOR_XFER_GOOD)
1521                 return USB_STOR_TRANSPORT_ERROR;
1522
1523         usb_stor_dbg(us, "INIT 7\n");
1524
1525         msleep(1400);
1526
1527         rc = usbat_read_user_io(us, status);
1528         if (rc != USB_STOR_XFER_GOOD)
1529                 return USB_STOR_TRANSPORT_ERROR;
1530
1531         usb_stor_dbg(us, "INIT 8\n");
1532
1533         rc = usbat_select_and_test_registers(us);
1534         if (rc != USB_STOR_TRANSPORT_GOOD)
1535                 return rc;
1536
1537         usb_stor_dbg(us, "INIT 9\n");
1538
1539         /* At this point, we need to detect which device we are using */
1540         if (usbat_set_transport(us, info, devicetype))
1541                 return USB_STOR_TRANSPORT_ERROR;
1542
1543         usb_stor_dbg(us, "INIT 10\n");
1544
1545         if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
1546                 subcountH = 0x02;
1547                 subcountL = 0x00;
1548         }
1549         rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
1550                                                                         0x00, 0x88, 0x08, subcountH, subcountL);
1551         if (rc != USB_STOR_XFER_GOOD)
1552                 return USB_STOR_TRANSPORT_ERROR;
1553
1554         usb_stor_dbg(us, "INIT 11\n");
1555
1556         return USB_STOR_TRANSPORT_GOOD;
1557 }
1558
1559 /*
1560  * Transport for the HP 8200e
1561  */
1562 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
1563 {
1564         int result;
1565         unsigned char *status = us->iobuf;
1566         unsigned char registers[32];
1567         unsigned char data[32];
1568         unsigned int len;
1569         int i;
1570
1571         len = scsi_bufflen(srb);
1572
1573         /* Send A0 (ATA PACKET COMMAND).
1574            Note: I guess we're never going to get any of the ATA
1575            commands... just ATA Packet Commands.
1576          */
1577
1578         registers[0] = USBAT_ATA_FEATURES;
1579         registers[1] = USBAT_ATA_SECCNT;
1580         registers[2] = USBAT_ATA_SECNUM;
1581         registers[3] = USBAT_ATA_LBA_ME;
1582         registers[4] = USBAT_ATA_LBA_HI;
1583         registers[5] = USBAT_ATA_DEVICE;
1584         registers[6] = USBAT_ATA_CMD;
1585         data[0] = 0x00;
1586         data[1] = 0x00;
1587         data[2] = 0x00;
1588         data[3] = len&0xFF;             /* (cylL) = expected length (L) */
1589         data[4] = (len>>8)&0xFF;        /* (cylH) = expected length (H) */
1590         data[5] = 0xB0;                 /* (device sel) = slave */
1591         data[6] = 0xA0;                 /* (command) = ATA PACKET COMMAND */
1592
1593         for (i=7; i<19; i++) {
1594                 registers[i] = 0x10;
1595                 data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
1596         }
1597
1598         result = usbat_get_status(us, status);
1599         usb_stor_dbg(us, "Status = %02X\n", *status);
1600         if (result != USB_STOR_XFER_GOOD)
1601                 return USB_STOR_TRANSPORT_ERROR;
1602         if (srb->cmnd[0] == TEST_UNIT_READY)
1603                 transferred = 0;
1604
1605         if (srb->sc_data_direction == DMA_TO_DEVICE) {
1606
1607                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1608                         registers, data, 19,
1609                         USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1610                         (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1611                         DMA_TO_DEVICE,
1612                         scsi_sglist(srb),
1613                         len, scsi_sg_count(srb), 10);
1614
1615                 if (result == USB_STOR_TRANSPORT_GOOD) {
1616                         transferred += len;
1617                         usb_stor_dbg(us, "Wrote %08X bytes\n", transferred);
1618                 }
1619
1620                 return result;
1621
1622         } else if (srb->cmnd[0] == READ_10 ||
1623                    srb->cmnd[0] == GPCMD_READ_CD) {
1624
1625                 return usbat_hp8200e_handle_read10(us, registers, data, srb);
1626
1627         }
1628
1629         if (len > 0xFFFF) {
1630                 usb_stor_dbg(us, "Error: len = %08X... what do I do now?\n",
1631                              len);
1632                 return USB_STOR_TRANSPORT_ERROR;
1633         }
1634
1635         result = usbat_multiple_write(us, registers, data, 7);
1636
1637         if (result != USB_STOR_TRANSPORT_GOOD)
1638                 return result;
1639
1640         /*
1641          * Write the 12-byte command header.
1642          *
1643          * If the command is BLANK then set the timer for 75 minutes.
1644          * Otherwise set it for 10 minutes.
1645          *
1646          * NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
1647          * AT SPEED 4 IS UNRELIABLE!!!
1648          */
1649
1650         result = usbat_write_block(us, USBAT_ATA, srb->cmnd, 12,
1651                                    srb->cmnd[0] == GPCMD_BLANK ? 75 : 10, 0);
1652
1653         if (result != USB_STOR_TRANSPORT_GOOD)
1654                 return result;
1655
1656         /* If there is response data to be read in then do it here. */
1657
1658         if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
1659
1660                 /* How many bytes to read in? Check cylL register */
1661
1662                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1663                         USB_STOR_XFER_GOOD) {
1664                         return USB_STOR_TRANSPORT_ERROR;
1665                 }
1666
1667                 if (len > 0xFF) { /* need to read cylH also */
1668                         len = *status;
1669                         if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1670                                     USB_STOR_XFER_GOOD) {
1671                                 return USB_STOR_TRANSPORT_ERROR;
1672                         }
1673                         len += ((unsigned int) *status)<<8;
1674                 }
1675                 else
1676                         len = *status;
1677
1678
1679                 result = usbat_read_block(us, scsi_sglist(srb), len,
1680                                                            scsi_sg_count(srb));
1681         }
1682
1683         return result;
1684 }
1685
1686 /*
1687  * Transport for USBAT02-based CompactFlash and similar storage devices
1688  */
1689 static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
1690 {
1691         int rc;
1692         struct usbat_info *info = (struct usbat_info *) (us->extra);
1693         unsigned long block, blocks;
1694         unsigned char *ptr = us->iobuf;
1695         static unsigned char inquiry_response[36] = {
1696                 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
1697         };
1698
1699         if (srb->cmnd[0] == INQUIRY) {
1700                 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
1701                 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
1702                 fill_inquiry_response(us, ptr, 36);
1703                 return USB_STOR_TRANSPORT_GOOD;
1704         }
1705
1706         if (srb->cmnd[0] == READ_CAPACITY) {
1707                 rc = usbat_flash_check_media(us, info);
1708                 if (rc != USB_STOR_TRANSPORT_GOOD)
1709                         return rc;
1710
1711                 rc = usbat_flash_get_sector_count(us, info);
1712                 if (rc != USB_STOR_TRANSPORT_GOOD)
1713                         return rc;
1714
1715                 /* hard coded 512 byte sectors as per ATA spec */
1716                 info->ssize = 0x200;
1717                 usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
1718                              info->sectors, info->ssize);
1719
1720                 /*
1721                  * build the reply
1722                  * note: must return the sector number of the last sector,
1723                  * *not* the total number of sectors
1724                  */
1725                 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
1726                 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
1727                 usb_stor_set_xfer_buf(ptr, 8, srb);
1728
1729                 return USB_STOR_TRANSPORT_GOOD;
1730         }
1731
1732         if (srb->cmnd[0] == MODE_SELECT_10) {
1733                 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
1734                 return USB_STOR_TRANSPORT_ERROR;
1735         }
1736
1737         if (srb->cmnd[0] == READ_10) {
1738                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1739                                 ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1740
1741                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1742
1743                 usb_stor_dbg(us, "READ_10: read block 0x%04lx  count %ld\n",
1744                              block, blocks);
1745                 return usbat_flash_read_data(us, info, block, blocks);
1746         }
1747
1748         if (srb->cmnd[0] == READ_12) {
1749                 /*
1750                  * I don't think we'll ever see a READ_12 but support it anyway
1751                  */
1752                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1753                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1754
1755                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1756                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
1757
1758                 usb_stor_dbg(us, "READ_12: read block 0x%04lx  count %ld\n",
1759                              block, blocks);
1760                 return usbat_flash_read_data(us, info, block, blocks);
1761         }
1762
1763         if (srb->cmnd[0] == WRITE_10) {
1764                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1765                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1766
1767                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1768
1769                 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx  count %ld\n",
1770                              block, blocks);
1771                 return usbat_flash_write_data(us, info, block, blocks);
1772         }
1773
1774         if (srb->cmnd[0] == WRITE_12) {
1775                 /*
1776                  * I don't think we'll ever see a WRITE_12 but support it anyway
1777                  */
1778                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1779                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
1780
1781                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1782                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
1783
1784                 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx  count %ld\n",
1785                              block, blocks);
1786                 return usbat_flash_write_data(us, info, block, blocks);
1787         }
1788
1789
1790         if (srb->cmnd[0] == TEST_UNIT_READY) {
1791                 usb_stor_dbg(us, "TEST_UNIT_READY\n");
1792
1793                 rc = usbat_flash_check_media(us, info);
1794                 if (rc != USB_STOR_TRANSPORT_GOOD)
1795                         return rc;
1796
1797                 return usbat_check_status(us);
1798         }
1799
1800         if (srb->cmnd[0] == REQUEST_SENSE) {
1801                 usb_stor_dbg(us, "REQUEST_SENSE\n");
1802
1803                 memset(ptr, 0, 18);
1804                 ptr[0] = 0xF0;
1805                 ptr[2] = info->sense_key;
1806                 ptr[7] = 11;
1807                 ptr[12] = info->sense_asc;
1808                 ptr[13] = info->sense_ascq;
1809                 usb_stor_set_xfer_buf(ptr, 18, srb);
1810
1811                 return USB_STOR_TRANSPORT_GOOD;
1812         }
1813
1814         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
1815                 /*
1816                  * sure.  whatever.  not like we can stop the user from popping
1817                  * the media out of the device (no locking doors, etc)
1818                  */
1819                 return USB_STOR_TRANSPORT_GOOD;
1820         }
1821
1822         usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
1823                      srb->cmnd[0], srb->cmnd[0]);
1824         info->sense_key = 0x05;
1825         info->sense_asc = 0x20;
1826         info->sense_ascq = 0x00;
1827         return USB_STOR_TRANSPORT_FAILED;
1828 }
1829
1830 static int init_usbat_cd(struct us_data *us)
1831 {
1832         return init_usbat(us, USBAT_DEV_HP8200);
1833 }
1834
1835 static int init_usbat_flash(struct us_data *us)
1836 {
1837         return init_usbat(us, USBAT_DEV_FLASH);
1838 }
1839
1840 static struct scsi_host_template usbat_host_template;
1841
1842 static int usbat_probe(struct usb_interface *intf,
1843                          const struct usb_device_id *id)
1844 {
1845         struct us_data *us;
1846         int result;
1847
1848         result = usb_stor_probe1(&us, intf, id,
1849                         (id - usbat_usb_ids) + usbat_unusual_dev_list,
1850                         &usbat_host_template);
1851         if (result)
1852                 return result;
1853
1854         /* The actual transport will be determined later by the
1855          * initialization routine; this is just a placeholder.
1856          */
1857         us->transport_name = "Shuttle USBAT";
1858         us->transport = usbat_flash_transport;
1859         us->transport_reset = usb_stor_CB_reset;
1860         us->max_lun = 0;
1861
1862         result = usb_stor_probe2(us);
1863         return result;
1864 }
1865
1866 static struct usb_driver usbat_driver = {
1867         .name =         DRV_NAME,
1868         .probe =        usbat_probe,
1869         .disconnect =   usb_stor_disconnect,
1870         .suspend =      usb_stor_suspend,
1871         .resume =       usb_stor_resume,
1872         .reset_resume = usb_stor_reset_resume,
1873         .pre_reset =    usb_stor_pre_reset,
1874         .post_reset =   usb_stor_post_reset,
1875         .id_table =     usbat_usb_ids,
1876         .soft_unbind =  1,
1877         .no_dynamic_id = 1,
1878 };
1879
1880 module_usb_stor_driver(usbat_driver, usbat_host_template, DRV_NAME);