drivers/usb/storage/shuttle_usbat.c

   1 /* Driver for SCM Microsystems USB-ATAPI cable
   2  *
   3  * $Id: shuttle_usbat.c,v 1.17 2002/04/22 03:39:43 mdharm Exp $
   4  *
   5  * Current development and maintenance by:
   6  *   (c) 2000, 2001 Robert Baruch (autophile@starband.net)
   7  *
   8  * Developed with the assistance of:
   9  *   (c) 2002 Alan Stern <stern@rowland.org>
  10  *
  11  * Many originally ATAPI devices were slightly modified to meet the USB
  12  * market by using some kind of translation from ATAPI to USB on the host,
  13  * and the peripheral would translate from USB back to ATAPI.
  14  *
  15  * SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only,
  16  * which does the USB-to-ATAPI conversion.  By obtaining the data sheet on
  17  * their device under nondisclosure agreement, I have been able to write
  18  * this driver for Linux.
  19  *
  20  * The chip used in the device can also be used for EPP and ISA translation
  21  * as well. This driver is only guaranteed to work with the ATAPI
  22  * translation.
  23  *
  24  * The only peripheral that I know of (as of 27 Mar 2001) that uses this
  25  * device is the Hewlett-Packard 8200e/8210e/8230e CD-Writer Plus.
  26  *
  27  * This program is free software; you can redistribute it and/or modify it
  28  * under the terms of the GNU General Public License as published by the
  29  * Free Software Foundation; either version 2, or (at your option) any
  30  * later version.
  31  *
  32  * This program is distributed in the hope that it will be useful, but
  33  * WITHOUT ANY WARRANTY; without even the implied warranty of
  34  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  35  * General Public License for more details.
  36  *
  37  * You should have received a copy of the GNU General Public License along
  38  * with this program; if not, write to the Free Software Foundation, Inc.,
  39  * 675 Mass Ave, Cambridge, MA 02139, USA.
  40  */
  41
  42 #include <linux/sched.h>
  43 #include <linux/errno.h>
  44 #include <linux/slab.h>
  45 #include <linux/cdrom.h>
  46
  47 #include <scsi/scsi.h>
  48 #include <scsi/scsi_cmnd.h>
  49
  50 #include "transport.h"
  51 #include "protocol.h"
  52 #include "usb.h"
  53 #include "debug.h"
  54 #include "shuttle_usbat.h"
  55
  56 #define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
  57 #define LSB_of(s) ((s)&0xFF)
  58 #define MSB_of(s) ((s)>>8)
  59
  60 int transferred = 0;
  61
  62 static int usbat_read(struct us_data *us,
  63                       unsigned char access,
  64                       unsigned char reg,
  65                       unsigned char *content)
  66 {
  67         int result;
  68
  69         result = usb_stor_ctrl_transfer(us,
  70                 us->recv_ctrl_pipe,
  71                 access,
  72                 0xC0,
  73                 (u16)reg,
  74                 0,
  75                 content,
  76                 1);
  77
  78         return result;
  79 }
  80
  81 static int usbat_write(struct us_data *us,
  82                        unsigned char access,
  83                        unsigned char reg,
  84                        unsigned char content)
  85 {
  86         int result;
  87
  88         result = usb_stor_ctrl_transfer(us,
  89                 us->send_ctrl_pipe,
  90                 access|0x01,
  91                 0x40,
  92                 short_pack(reg, content),
  93                 0,
  94                 NULL,
  95                 0);
  96
  97         return result;
  98 }
  99
 100 static int usbat_set_shuttle_features(struct us_data *us,
 101                                       unsigned char external_trigger,
 102                                       unsigned char epp_control,
 103                                       unsigned char mask_byte,
 104                                       unsigned char test_pattern,
 105                                       unsigned char subcountH,
 106                                       unsigned char subcountL)
 107 {
 108         int result;
 109         unsigned char *command = us->iobuf;
 110
 111         command[0] = 0x40;
 112         command[1] = 0x81;
 113         command[2] = epp_control;
 114         command[3] = external_trigger;
 115         command[4] = test_pattern;
 116         command[5] = mask_byte;
 117         command[6] = subcountL;
 118         command[7] = subcountH;
 119
 120         result = usb_stor_ctrl_transfer(us,
 121                 us->send_ctrl_pipe,
 122                 0x80,
 123                 0x40,
 124                 0,
 125                 0,
 126                 command,
 127                 8);
 128
 129         return result;
 130 }
 131
 132 static int usbat_read_block(struct us_data *us,
 133                             unsigned char access,
 134                             unsigned char reg,
 135                             unsigned char *content,
 136                             unsigned short len,
 137                             int use_sg)
 138 {
 139         int result;
 140         unsigned char *command = us->iobuf;
 141
 142         if (!len)
 143                 return USB_STOR_TRANSPORT_GOOD;
 144
 145         command[0] = 0xC0;
 146         command[1] = access | 0x02;
 147         command[2] = reg;
 148         command[3] = 0;
 149         command[4] = 0;
 150         command[5] = 0;
 151         command[6] = LSB_of(len);
 152         command[7] = MSB_of(len);
 153
 154         result = usb_stor_ctrl_transfer(us,
 155                 us->send_ctrl_pipe,
 156                 0x80,
 157                 0x40,
 158                 0,
 159                 0,
 160                 command,
 161                 8);
 162
 163         if (result != USB_STOR_XFER_GOOD)
 164                 return USB_STOR_TRANSPORT_ERROR;
 165
 166         result = usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe,
 167                         content, len, use_sg, NULL);
 168
 169         return (result == USB_STOR_XFER_GOOD ?
 170                         USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
 171 }
 172
 173 /*
 174  * Block, waiting for an ATA device to become not busy or to report
 175  * an error condition.
 176  */
 177
 178 static int usbat_wait_not_busy(struct us_data *us, int minutes)
 179 {
 180         int i;
 181         int result;
 182         unsigned char *status = us->iobuf;
 183
 184         /* Synchronizing cache on a CDR could take a heck of a long time,
 185          * but probably not more than 10 minutes or so. On the other hand,
 186          * doing a full blank on a CDRW at speed 1 will take about 75
 187          * minutes!
 188          */
 189
 190         for (i=0; i<1200+minutes*60; i++) {
 191
 192                 result = usbat_read(us, USBAT_ATA, 0x17, status);
 193
 194                 if (result!=USB_STOR_XFER_GOOD)
 195                         return USB_STOR_TRANSPORT_ERROR;
 196                 if (*status & 0x01) { // check condition
 197                         result = usbat_read(us, USBAT_ATA, 0x10, status);
 198                         return USB_STOR_TRANSPORT_FAILED;
 199                 }
 200                 if (*status & 0x20) // device fault
 201                         return USB_STOR_TRANSPORT_FAILED;
 202
 203                 if ((*status & 0x80)==0x00) { // not busy
 204                         US_DEBUGP("Waited not busy for %d steps\n", i);
 205                         return USB_STOR_TRANSPORT_GOOD;
 206                 }
 207
 208                 if (i<500)
 209                         msleep(10); // 5 seconds
 210                 else if (i<700)
 211                         msleep(50); // 10 seconds
 212                 else if (i<1200)
 213                         msleep(100); // 50 seconds
 214                 else
 215                         msleep(1000); // X minutes
 216         }
 217
 218         US_DEBUGP("Waited not busy for %d minutes, timing out.\n",
 219                 minutes);
 220         return USB_STOR_TRANSPORT_FAILED;
 221 }
 222
 223 static int usbat_write_block(struct us_data *us,
 224                              unsigned char access,
 225                              unsigned char reg,
 226                              unsigned char *content,
 227                              unsigned short len,
 228                              int use_sg, int minutes)
 229 {
 230         int result;
 231         unsigned char *command = us->iobuf;
 232
 233         if (!len)
 234                 return USB_STOR_TRANSPORT_GOOD;
 235
 236         command[0] = 0x40;
 237         command[1] = access | 0x03;
 238         command[2] = reg;
 239         command[3] = 0;
 240         command[4] = 0;
 241         command[5] = 0;
 242         command[6] = LSB_of(len);
 243         command[7] = MSB_of(len);
 244
 245         result = usb_stor_ctrl_transfer(us,
 246                 us->send_ctrl_pipe,
 247                 0x80,
 248                 0x40,
 249                 0,
 250                 0,
 251                 command,
 252                 8);
 253
 254         if (result != USB_STOR_XFER_GOOD)
 255                 return USB_STOR_TRANSPORT_ERROR;
 256
 257         result = usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe,
 258                         content, len, use_sg, NULL);
 259
 260         if (result != USB_STOR_XFER_GOOD)
 261                 return USB_STOR_TRANSPORT_ERROR;
 262
 263         return usbat_wait_not_busy(us, minutes);
 264 }
 265
 266 static int usbat_rw_block_test(struct us_data *us,
 267                                unsigned char access,
 268                                unsigned char *registers,
 269                                unsigned char *data_out,
 270                                unsigned short num_registers,
 271                                unsigned char data_reg,
 272                                unsigned char status_reg,
 273                                unsigned char timeout,
 274                                unsigned char qualifier,
 275                                int direction,
 276                                unsigned char *content,
 277                                unsigned short len,
 278                                int use_sg,
 279                                int minutes)
 280 {
 281         int result;
 282         unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
 283                         us->recv_bulk_pipe : us->send_bulk_pipe;
 284
 285         // Not really sure the 0x07, 0x17, 0xfc, 0xe7 is necessary here,
 286         // but that's what came out of the trace every single time.
 287
 288         unsigned char *command = us->iobuf;
 289         int i, j;
 290         int cmdlen;
 291         unsigned char *data = us->iobuf;
 292         unsigned char *status = us->iobuf;
 293
 294         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 295
 296         for (i=0; i<20; i++) {
 297
 298                 /*
 299                  * The first time we send the full command, which consists
 300                  * of downloading the SCSI command followed by downloading
 301                  * the data via a write-and-test.  Any other time we only
 302                  * send the command to download the data -- the SCSI command
 303                  * is still 'active' in some sense in the device.
 304                  *
 305                  * We're only going to try sending the data 10 times. After
 306                  * that, we just return a failure.
 307                  */
 308
 309                 if (i==0) {
 310                         cmdlen = 16;
 311                         command[0] = 0x40;
 312                         command[1] = access | 0x07;
 313                         command[2] = 0x07;
 314                         command[3] = 0x17;
 315                         command[4] = 0xFC;
 316                         command[5] = 0xE7;
 317                         command[6] = LSB_of(num_registers*2);
 318                         command[7] = MSB_of(num_registers*2);
 319                 } else
 320                         cmdlen = 8;
 321
 322                 command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
 323                 command[cmdlen-7] = access |
 324                                 (direction==DMA_TO_DEVICE ? 0x05 : 0x04);
 325                 command[cmdlen-6] = data_reg;
 326                 command[cmdlen-5] = status_reg;
 327                 command[cmdlen-4] = timeout;
 328                 command[cmdlen-3] = qualifier;
 329                 command[cmdlen-2] = LSB_of(len);
 330                 command[cmdlen-1] = MSB_of(len);
 331
 332                 result = usb_stor_ctrl_transfer(us,
 333                         us->send_ctrl_pipe,
 334                         0x80,
 335                         0x40,
 336                         0,
 337                         0,
 338                         command,
 339                         cmdlen);
 340
 341                 if (result != USB_STOR_XFER_GOOD)
 342                         return USB_STOR_TRANSPORT_ERROR;
 343
 344                 if (i==0) {
 345
 346                         for (j=0; j<num_registers; j++) {
 347                                 data[j<<1] = registers[j];
 348                                 data[1+(j<<1)] = data_out[j];
 349                         }
 350
 351                         result = usb_stor_bulk_transfer_buf(us,
 352                                         us->send_bulk_pipe,
 353                                         data, num_registers*2, NULL);
 354
 355                         if (result != USB_STOR_XFER_GOOD)
 356                                 return USB_STOR_TRANSPORT_ERROR;
 357
 358                 }
 359
 360
 361                 //US_DEBUGP("Transfer %s %d bytes, sg buffers %d\n",
 362                 //      direction == DMA_TO_DEVICE ? "out" : "in",
 363                 //      len, use_sg);
 364
 365                 result = usb_stor_bulk_transfer_sg(us,
 366                         pipe, content, len, use_sg, NULL);
 367
 368                 /*
 369                  * If we get a stall on the bulk download, we'll retry
 370                  * the bulk download -- but not the SCSI command because
 371                  * in some sense the SCSI command is still 'active' and
 372                  * waiting for the data. Don't ask me why this should be;
 373                  * I'm only following what the Windoze driver did.
 374                  *
 375                  * Note that a stall for the test-and-read/write command means
 376                  * that the test failed. In this case we're testing to make
 377                  * sure that the device is error-free
 378                  * (i.e. bit 0 -- CHK -- of status is 0). The most likely
 379                  * hypothesis is that the USBAT chip somehow knows what
 380                  * the device will accept, but doesn't give the device any
 381                  * data until all data is received. Thus, the device would
 382                  * still be waiting for the first byte of data if a stall
 383                  * occurs, even if the stall implies that some data was
 384                  * transferred.
 385                  */
 386
 387                 if (result == USB_STOR_XFER_SHORT ||
 388                                 result == USB_STOR_XFER_STALLED) {
 389
 390                         /*
 391                          * If we're reading and we stalled, then clear
 392                          * the bulk output pipe only the first time.
 393                          */
 394
 395                         if (direction==DMA_FROM_DEVICE && i==0) {
 396                                 if (usb_stor_clear_halt(us,
 397                                                 us->send_bulk_pipe) < 0)
 398                                         return USB_STOR_TRANSPORT_ERROR;
 399                         }
 400
 401                         /*
 402                          * Read status: is the device angry, or just busy?
 403                          */
 404
 405                         result = usbat_read(us, USBAT_ATA,
 406                                 direction==DMA_TO_DEVICE ? 0x17 : 0x0E,
 407                                 status);
 408
 409                         if (result!=USB_STOR_XFER_GOOD)
 410                                 return USB_STOR_TRANSPORT_ERROR;
 411                         if (*status & 0x01) // check condition
 412                                 return USB_STOR_TRANSPORT_FAILED;
 413                         if (*status & 0x20) // device fault
 414                                 return USB_STOR_TRANSPORT_FAILED;
 415
 416                         US_DEBUGP("Redoing %s\n",
 417                           direction==DMA_TO_DEVICE ? "write" : "read");
 418
 419                 } else if (result != USB_STOR_XFER_GOOD)
 420                         return USB_STOR_TRANSPORT_ERROR;
 421                 else
 422                         return usbat_wait_not_busy(us, minutes);
 423
 424         }
 425
 426         US_DEBUGP("Bummer! %s bulk data 20 times failed.\n",
 427                 direction==DMA_TO_DEVICE ? "Writing" : "Reading");
 428
 429         return USB_STOR_TRANSPORT_FAILED;
 430 }
 431
 432 /*
 433  * Write data to multiple registers at once. Not meant for large
 434  * transfers of data!
 435  */
 436
 437 static int usbat_multiple_write(struct us_data *us,
 438                                 unsigned char access,
 439                                 unsigned char *registers,
 440                                 unsigned char *data_out,
 441                                 unsigned short num_registers)
 442 {
 443         int result;
 444         unsigned char *data = us->iobuf;
 445         int i;
 446         unsigned char *command = us->iobuf;
 447
 448         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 449
 450         command[0] = 0x40;
 451         command[1] = access | 0x07;
 452         command[2] = 0;
 453         command[3] = 0;
 454         command[4] = 0;
 455         command[5] = 0;
 456         command[6] = LSB_of(num_registers*2);
 457         command[7] = MSB_of(num_registers*2);
 458
 459         result = usb_stor_ctrl_transfer(us,
 460                 us->send_ctrl_pipe,
 461                 0x80,
 462                 0x40,
 463                 0,
 464                 0,
 465                 command,
 466                 8);
 467
 468         if (result != USB_STOR_XFER_GOOD)
 469                 return USB_STOR_TRANSPORT_ERROR;
 470
 471         for (i=0; i<num_registers; i++) {
 472                 data[i<<1] = registers[i];
 473                 data[1+(i<<1)] = data_out[i];
 474         }
 475
 476         result = usb_stor_bulk_transfer_buf(us,
 477                 us->send_bulk_pipe, data, num_registers*2, NULL);
 478
 479         if (result != USB_STOR_XFER_GOOD)
 480                 return USB_STOR_TRANSPORT_ERROR;
 481
 482         return usbat_wait_not_busy(us, 0);
 483 }
 484
 485 static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
 486 {
 487         int result;
 488
 489         result = usb_stor_ctrl_transfer(us,
 490                 us->recv_ctrl_pipe,
 491                 0x82,
 492                 0xC0,
 493                 0,
 494                 0,
 495                 data_flags,
 496                 1);
 497
 498         return result;
 499 }
 500
 501 static int usbat_write_user_io(struct us_data *us,
 502                                unsigned char enable_flags,
 503                                unsigned char data_flags)
 504 {
 505         int result;
 506
 507         result = usb_stor_ctrl_transfer(us,
 508                 us->send_ctrl_pipe,
 509                 0x82,
 510                 0x40,
 511                 short_pack(enable_flags, data_flags),
 512                 0,
 513                 NULL,
 514                 0);
 515
 516         return result;
 517 }
 518
 519 /*
 520  * Squeeze a potentially huge (> 65535 byte) read10 command into
 521  * a little ( <= 65535 byte) ATAPI pipe
 522  */
 523
 524 static int usbat_handle_read10(struct us_data *us,
 525                                unsigned char *registers,
 526                                unsigned char *data,
 527                                struct scsi_cmnd *srb)
 528 {
 529         int result = USB_STOR_TRANSPORT_GOOD;
 530         unsigned char *buffer;
 531         unsigned int len;
 532         unsigned int sector;
 533         unsigned int sg_segment = 0;
 534         unsigned int sg_offset = 0;
 535
 536         US_DEBUGP("handle_read10: transfersize %d\n",
 537                 srb->transfersize);
 538
 539         if (srb->request_bufflen < 0x10000) {
 540
 541                 result = usbat_rw_block_test(us, USBAT_ATA,
 542                         registers, data, 19,
 543                         0x10, 0x17, 0xFD, 0x30,
 544                         DMA_FROM_DEVICE,
 545                         srb->request_buffer,
 546                         srb->request_bufflen, srb->use_sg, 1);
 547
 548                 return result;
 549         }
 550
 551         /*
 552          * Since we're requesting more data than we can handle in
 553          * a single read command (max is 64k-1), we will perform
 554          * multiple reads, but each read must be in multiples of
 555          * a sector.  Luckily the sector size is in srb->transfersize
 556          * (see linux/drivers/scsi/sr.c).
 557          */
 558
 559         if (data[7+0] == GPCMD_READ_CD) {
 560                 len = short_pack(data[7+9], data[7+8]);
 561                 len <<= 16;
 562                 len |= data[7+7];
 563                 US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len);
 564                 srb->transfersize = srb->request_bufflen/len;
 565         }
 566
 567         if (!srb->transfersize)  {
 568                 srb->transfersize = 2048; /* A guess */
 569                 US_DEBUGP("handle_read10: transfersize 0, forcing %d\n",
 570                         srb->transfersize);
 571         }
 572
 573         // Since we only read in one block at a time, we have to create
 574         // a bounce buffer and move the data a piece at a time between the
 575         // bounce buffer and the actual transfer buffer.
 576
 577         len = (65535/srb->transfersize) * srb->transfersize;
 578         US_DEBUGP("Max read is %d bytes\n", len);
 579         len = min(len, srb->request_bufflen);
 580         buffer = kmalloc(len, GFP_NOIO);
 581         if (buffer == NULL) // bloody hell!
 582                 return USB_STOR_TRANSPORT_FAILED;
 583         sector = short_pack(data[7+3], data[7+2]);
 584         sector <<= 16;
 585         sector |= short_pack(data[7+5], data[7+4]);
 586         transferred = 0;
 587
 588         sg_segment = 0; // for keeping track of where we are in
 589         sg_offset = 0;  // the scatter/gather list
 590
 591         while (transferred != srb->request_bufflen) {
 592
 593                 if (len > srb->request_bufflen - transferred)
 594                         len = srb->request_bufflen - transferred;
 595
 596                 data[3] = len&0xFF;       // (cylL) = expected length (L)
 597                 data[4] = (len>>8)&0xFF;  // (cylH) = expected length (H)
 598
 599                 // Fix up the SCSI command sector and num sectors
 600
 601                 data[7+2] = MSB_of(sector>>16); // SCSI command sector
 602                 data[7+3] = LSB_of(sector>>16);
 603                 data[7+4] = MSB_of(sector&0xFFFF);
 604                 data[7+5] = LSB_of(sector&0xFFFF);
 605                 if (data[7+0] == GPCMD_READ_CD)
 606                         data[7+6] = 0;
 607                 data[7+7] = MSB_of(len / srb->transfersize); // SCSI command
 608                 data[7+8] = LSB_of(len / srb->transfersize); // num sectors
 609
 610                 result = usbat_rw_block_test(us, USBAT_ATA,
 611                         registers, data, 19,
 612                         0x10, 0x17, 0xFD, 0x30,
 613                         DMA_FROM_DEVICE,
 614                         buffer,
 615                         len, 0, 1);
 616
 617                 if (result != USB_STOR_TRANSPORT_GOOD)
 618                         break;
 619
 620                 // Store the data in the transfer buffer
 621                 usb_stor_access_xfer_buf(buffer, len, srb,
 622                                  &sg_segment, &sg_offset, TO_XFER_BUF);
 623
 624                 // Update the amount transferred and the sector number
 625
 626                 transferred += len;
 627                 sector += len / srb->transfersize;
 628
 629         } // while transferred != srb->request_bufflen
 630
 631         kfree(buffer);
 632         return result;
 633 }
 634
 635 static int hp_8200e_select_and_test_registers(struct us_data *us)
 636 {
 637         int selector;
 638         unsigned char *status = us->iobuf;
 639
 640         // try device = master, then device = slave.
 641
 642         for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
 643
 644                 if (usbat_write(us, USBAT_ATA, 0x16, selector) !=
 645                                 USB_STOR_XFER_GOOD)
 646                         return USB_STOR_TRANSPORT_ERROR;
 647
 648                 if (usbat_read(us, USBAT_ATA, 0x17, status) !=
 649                                 USB_STOR_XFER_GOOD)
 650                         return USB_STOR_TRANSPORT_ERROR;
 651
 652                 if (usbat_read(us, USBAT_ATA, 0x16, status) !=
 653                                 USB_STOR_XFER_GOOD)
 654                         return USB_STOR_TRANSPORT_ERROR;
 655
 656                 if (usbat_read(us, USBAT_ATA, 0x14, status) !=
 657                                 USB_STOR_XFER_GOOD)
 658                         return USB_STOR_TRANSPORT_ERROR;
 659
 660                 if (usbat_read(us, USBAT_ATA, 0x15, status) !=
 661                                 USB_STOR_XFER_GOOD)
 662                         return USB_STOR_TRANSPORT_ERROR;
 663
 664                 if (usbat_write(us, USBAT_ATA, 0x14, 0x55) !=
 665                                 USB_STOR_XFER_GOOD)
 666                         return USB_STOR_TRANSPORT_ERROR;
 667
 668                 if (usbat_write(us, USBAT_ATA, 0x15, 0xAA) !=
 669                                 USB_STOR_XFER_GOOD)
 670                         return USB_STOR_TRANSPORT_ERROR;
 671
 672                 if (usbat_read(us, USBAT_ATA, 0x14, status) !=
 673                                 USB_STOR_XFER_GOOD)
 674                         return USB_STOR_TRANSPORT_ERROR;
 675
 676                 if (usbat_read(us, USBAT_ATA, 0x15, status) !=
 677                                 USB_STOR_XFER_GOOD)
 678                         return USB_STOR_TRANSPORT_ERROR;
 679         }
 680
 681         return USB_STOR_TRANSPORT_GOOD;
 682 }
 683
 684 int init_8200e(struct us_data *us)
 685 {
 686         int result;
 687         unsigned char *status = us->iobuf;
 688
 689         // Enable peripheral control signals
 690
 691         if (usbat_write_user_io(us,
 692           USBAT_UIO_OE1 | USBAT_UIO_OE0,
 693           USBAT_UIO_EPAD | USBAT_UIO_1) != USB_STOR_XFER_GOOD)
 694                 return USB_STOR_TRANSPORT_ERROR;
 695
 696         US_DEBUGP("INIT 1\n");
 697
 698         msleep(2000);
 699
 700         if (usbat_read_user_io(us, status) !=
 701                         USB_STOR_XFER_GOOD)
 702                 return USB_STOR_TRANSPORT_ERROR;
 703
 704         US_DEBUGP("INIT 2\n");
 705
 706         if (usbat_read_user_io(us, status) !=
 707                         USB_STOR_XFER_GOOD)
 708                 return USB_STOR_TRANSPORT_ERROR;
 709
 710         US_DEBUGP("INIT 3\n");
 711
 712         // Reset peripheral, enable periph control signals
 713         // (bring reset signal up)
 714
 715         if (usbat_write_user_io(us,
 716           USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
 717           USBAT_UIO_EPAD | USBAT_UIO_1) != USB_STOR_XFER_GOOD)
 718                 return USB_STOR_TRANSPORT_ERROR;
 719
 720         US_DEBUGP("INIT 4\n");
 721
 722         // Enable periph control signals
 723         // (bring reset signal down)
 724
 725         if (usbat_write_user_io(us,
 726           USBAT_UIO_OE1 | USBAT_UIO_OE0,
 727           USBAT_UIO_EPAD | USBAT_UIO_1) != USB_STOR_XFER_GOOD)
 728                 return USB_STOR_TRANSPORT_ERROR;
 729
 730         US_DEBUGP("INIT 5\n");
 731
 732         msleep(250);
 733
 734         // Write 0x80 to ISA port 0x3F
 735
 736         if (usbat_write(us, USBAT_ISA, 0x3F, 0x80) !=
 737                         USB_STOR_XFER_GOOD)
 738                 return USB_STOR_TRANSPORT_ERROR;
 739
 740         US_DEBUGP("INIT 6\n");
 741
 742         // Read ISA port 0x27
 743
 744         if (usbat_read(us, USBAT_ISA, 0x27, status) !=
 745                         USB_STOR_XFER_GOOD)
 746                 return USB_STOR_TRANSPORT_ERROR;
 747
 748         US_DEBUGP("INIT 7\n");
 749
 750         if (usbat_read_user_io(us, status) !=
 751                         USB_STOR_XFER_GOOD)
 752                 return USB_STOR_TRANSPORT_ERROR;
 753
 754         US_DEBUGP("INIT 8\n");
 755
 756         if ( (result = hp_8200e_select_and_test_registers(us)) !=
 757                          USB_STOR_TRANSPORT_GOOD)
 758                 return result;
 759
 760         US_DEBUGP("INIT 9\n");
 761
 762         if (usbat_read_user_io(us, status) !=
 763                         USB_STOR_XFER_GOOD)
 764                 return USB_STOR_TRANSPORT_ERROR;
 765
 766         US_DEBUGP("INIT 10\n");
 767
 768         // Enable periph control signals and card detect
 769
 770         if (usbat_write_user_io(us,
 771           USBAT_UIO_ACKD |USBAT_UIO_OE1 | USBAT_UIO_OE0,
 772           USBAT_UIO_EPAD | USBAT_UIO_1) != USB_STOR_XFER_GOOD)
 773                 return USB_STOR_TRANSPORT_ERROR;
 774
 775         US_DEBUGP("INIT 11\n");
 776
 777         if (usbat_read_user_io(us, status) !=
 778                         USB_STOR_XFER_GOOD)
 779                 return USB_STOR_TRANSPORT_ERROR;
 780
 781         US_DEBUGP("INIT 12\n");
 782
 783         msleep(1400);
 784
 785         if (usbat_read_user_io(us, status) !=
 786                         USB_STOR_XFER_GOOD)
 787                 return USB_STOR_TRANSPORT_ERROR;
 788
 789         US_DEBUGP("INIT 13\n");
 790
 791         if ( (result = hp_8200e_select_and_test_registers(us)) !=
 792                          USB_STOR_TRANSPORT_GOOD)
 793                 return result;
 794
 795         US_DEBUGP("INIT 14\n");
 796
 797         if (usbat_set_shuttle_features(us,
 798                         0x83, 0x00, 0x88, 0x08, 0x15, 0x14) !=
 799                          USB_STOR_XFER_GOOD)
 800                 return USB_STOR_TRANSPORT_ERROR;
 801
 802         US_DEBUGP("INIT 15\n");
 803
 804         return USB_STOR_TRANSPORT_GOOD;
 805 }
 806
 807 /*
 808  * Transport for the HP 8200e
 809  */
 810 int hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
 811 {
 812         int result;
 813         unsigned char *status = us->iobuf;
 814         unsigned char registers[32];
 815         unsigned char data[32];
 816         unsigned int len;
 817         int i;
 818         char string[64];
 819
 820         len = srb->request_bufflen;
 821
 822         /* Send A0 (ATA PACKET COMMAND).
 823            Note: I guess we're never going to get any of the ATA
 824            commands... just ATA Packet Commands.
 825          */
 826
 827         registers[0] = 0x11;
 828         registers[1] = 0x12;
 829         registers[2] = 0x13;
 830         registers[3] = 0x14;
 831         registers[4] = 0x15;
 832         registers[5] = 0x16;
 833         registers[6] = 0x17;
 834         data[0] = 0x00;
 835         data[1] = 0x00;
 836         data[2] = 0x00;
 837         data[3] = len&0xFF;             // (cylL) = expected length (L)
 838         data[4] = (len>>8)&0xFF;        // (cylH) = expected length (H)
 839         data[5] = 0xB0;                 // (device sel) = slave
 840         data[6] = 0xA0;                 // (command) = ATA PACKET COMMAND
 841
 842         for (i=7; i<19; i++) {
 843                 registers[i] = 0x10;
 844                 data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
 845         }
 846
 847         result = usbat_read(us, USBAT_ATA, 0x17, status);
 848         US_DEBUGP("Status = %02X\n", *status);
 849         if (result != USB_STOR_XFER_GOOD)
 850                 return USB_STOR_TRANSPORT_ERROR;
 851         if (srb->cmnd[0] == TEST_UNIT_READY)
 852                 transferred = 0;
 853
 854         if (srb->sc_data_direction == DMA_TO_DEVICE) {
 855
 856                 result = usbat_rw_block_test(us, USBAT_ATA,
 857                         registers, data, 19,
 858                         0x10, 0x17, 0xFD, 0x30,
 859                         DMA_TO_DEVICE,
 860                         srb->request_buffer,
 861                         len, srb->use_sg, 10);
 862
 863                 if (result == USB_STOR_TRANSPORT_GOOD) {
 864                         transferred += len;
 865                         US_DEBUGP("Wrote %08X bytes\n", transferred);
 866                 }
 867
 868                 return result;
 869
 870         } else if (srb->cmnd[0] == READ_10 ||
 871                    srb->cmnd[0] == GPCMD_READ_CD) {
 872
 873                 return usbat_handle_read10(us, registers, data, srb);
 874
 875         }
 876
 877         if (len > 0xFFFF) {
 878                 US_DEBUGP("Error: len = %08X... what do I do now?\n",
 879                         len);
 880                 return USB_STOR_TRANSPORT_ERROR;
 881         }
 882
 883         if ( (result = usbat_multiple_write(us,
 884                         USBAT_ATA,
 885                         registers, data, 7)) != USB_STOR_TRANSPORT_GOOD) {
 886                 return result;
 887         }
 888
 889         // Write the 12-byte command header.
 890
 891         // If the command is BLANK then set the timer for 75 minutes.
 892         // Otherwise set it for 10 minutes.
 893
 894         // NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
 895         // AT SPEED 4 IS UNRELIABLE!!!
 896
 897         if ( (result = usbat_write_block(us,
 898                         USBAT_ATA, 0x10, srb->cmnd, 12, 0,
 899                         srb->cmnd[0]==GPCMD_BLANK ? 75 : 10)) !=
 900                                 USB_STOR_TRANSPORT_GOOD) {
 901                 return result;
 902         }
 903
 904         // If there is response data to be read in
 905         // then do it here.
 906
 907         if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
 908
 909                 // How many bytes to read in? Check cylL register
 910
 911                 if (usbat_read(us, USBAT_ATA, 0x14, status) !=
 912                         USB_STOR_XFER_GOOD) {
 913                         return USB_STOR_TRANSPORT_ERROR;
 914                 }
 915
 916                 if (len > 0xFF) { // need to read cylH also
 917                         len = *status;
 918                         if (usbat_read(us, USBAT_ATA, 0x15, status) !=
 919                                     USB_STOR_XFER_GOOD) {
 920                                 return USB_STOR_TRANSPORT_ERROR;
 921                         }
 922                         len += ((unsigned int) *status)<<8;
 923                 }
 924                 else
 925                         len = *status;
 926
 927
 928                 result = usbat_read_block(us, USBAT_ATA, 0x10,
 929                         srb->request_buffer, len, srb->use_sg);
 930
 931                 /* Debug-print the first 32 bytes of the transfer */
 932
 933                 if (!srb->use_sg) {
 934                         string[0] = 0;
 935                         for (i=0; i<len && i<32; i++) {
 936                                 sprintf(string+strlen(string), "%02X ",
 937                                   ((unsigned char *)srb->request_buffer)[i]);
 938                                 if ((i%16)==15) {
 939                                         US_DEBUGP("%s\n", string);
 940                                         string[0] = 0;
 941                                 }
 942                         }
 943                         if (string[0]!=0)
 944                                 US_DEBUGP("%s\n", string);
 945                 }
 946         }
 947
 948         return result;
 949 }
 950
 951