Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Driver for Datafab USB Compact Flash reader |
| 2 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * datafab driver v0.1: |
| 4 | * |
| 5 | * First release |
| 6 | * |
| 7 | * Current development and maintenance by: |
| 8 | * (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org) |
| 9 | * |
| 10 | * Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver |
| 11 | * which I used as a template for this driver. |
| 12 | * |
| 13 | * Some bugfixes and scatter-gather code by Gregory P. Smith |
| 14 | * (greg-usb@electricrain.com) |
| 15 | * |
| 16 | * Fix for media change by Joerg Schneider (js@joergschneider.com) |
| 17 | * |
| 18 | * Other contributors: |
| 19 | * (c) 2002 Alan Stern <stern@rowland.org> |
| 20 | * |
| 21 | * This program is free software; you can redistribute it and/or modify it |
| 22 | * under the terms of the GNU General Public License as published by the |
| 23 | * Free Software Foundation; either version 2, or (at your option) any |
| 24 | * later version. |
| 25 | * |
| 26 | * This program is distributed in the hope that it will be useful, but |
| 27 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 29 | * General Public License for more details. |
| 30 | * |
| 31 | * You should have received a copy of the GNU General Public License along |
| 32 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 33 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 34 | */ |
| 35 | |
| 36 | /* |
| 37 | * This driver attempts to support USB CompactFlash reader/writer devices |
| 38 | * based on Datafab USB-to-ATA chips. It was specifically developed for the |
| 39 | * Datafab MDCFE-B USB CompactFlash reader but has since been found to work |
| 40 | * with a variety of Datafab-based devices from a number of manufacturers. |
| 41 | * I've received a report of this driver working with a Datafab-based |
| 42 | * SmartMedia device though please be aware that I'm personally unable to |
| 43 | * test SmartMedia support. |
| 44 | * |
| 45 | * This driver supports reading and writing. If you're truly paranoid, |
| 46 | * however, you can force the driver into a write-protected state by setting |
| 47 | * the WP enable bits in datafab_handle_mode_sense(). See the comments |
| 48 | * in that routine. |
| 49 | */ |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/errno.h> |
| 52 | #include <linux/slab.h> |
| 53 | |
| 54 | #include <scsi/scsi.h> |
| 55 | #include <scsi/scsi_cmnd.h> |
| 56 | |
| 57 | #include "usb.h" |
| 58 | #include "transport.h" |
| 59 | #include "protocol.h" |
| 60 | #include "debug.h" |
| 61 | #include "datafab.h" |
| 62 | |
| 63 | static int datafab_determine_lun(struct us_data *us, |
| 64 | struct datafab_info *info); |
| 65 | |
| 66 | |
| 67 | static inline int |
| 68 | datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) { |
| 69 | if (len == 0) |
| 70 | return USB_STOR_XFER_GOOD; |
| 71 | |
| 72 | US_DEBUGP("datafab_bulk_read: len = %d\n", len); |
| 73 | return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, |
| 74 | data, len, NULL); |
| 75 | } |
| 76 | |
| 77 | |
| 78 | static inline int |
| 79 | datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) { |
| 80 | if (len == 0) |
| 81 | return USB_STOR_XFER_GOOD; |
| 82 | |
| 83 | US_DEBUGP("datafab_bulk_write: len = %d\n", len); |
| 84 | return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, |
| 85 | data, len, NULL); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | static int datafab_read_data(struct us_data *us, |
| 90 | struct datafab_info *info, |
| 91 | u32 sector, |
| 92 | u32 sectors) |
| 93 | { |
| 94 | unsigned char *command = us->iobuf; |
| 95 | unsigned char *buffer; |
| 96 | unsigned char thistime; |
| 97 | unsigned int totallen, alloclen; |
| 98 | int len, result; |
Jens Axboe | 1f6f31a | 2007-05-11 12:33:09 +0200 | [diff] [blame] | 99 | unsigned int sg_offset = 0; |
| 100 | struct scatterlist *sg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | // we're working in LBA mode. according to the ATA spec, |
| 103 | // we can support up to 28-bit addressing. I don't know if Datafab |
| 104 | // supports beyond 24-bit addressing. It's kind of hard to test |
| 105 | // since it requires > 8GB CF card. |
| 106 | // |
| 107 | if (sectors > 0x0FFFFFFF) |
| 108 | return USB_STOR_TRANSPORT_ERROR; |
| 109 | |
| 110 | if (info->lun == -1) { |
| 111 | result = datafab_determine_lun(us, info); |
| 112 | if (result != USB_STOR_TRANSPORT_GOOD) |
| 113 | return result; |
| 114 | } |
| 115 | |
| 116 | totallen = sectors * info->ssize; |
| 117 | |
| 118 | // Since we don't read more than 64 KB at a time, we have to create |
| 119 | // a bounce buffer and move the data a piece at a time between the |
| 120 | // bounce buffer and the actual transfer buffer. |
| 121 | |
| 122 | alloclen = min(totallen, 65536u); |
| 123 | buffer = kmalloc(alloclen, GFP_NOIO); |
| 124 | if (buffer == NULL) |
| 125 | return USB_STOR_TRANSPORT_ERROR; |
| 126 | |
| 127 | do { |
| 128 | // loop, never allocate or transfer more than 64k at once |
| 129 | // (min(128k, 255*info->ssize) is the real limit) |
| 130 | |
| 131 | len = min(totallen, alloclen); |
| 132 | thistime = (len / info->ssize) & 0xff; |
| 133 | |
| 134 | command[0] = 0; |
| 135 | command[1] = thistime; |
| 136 | command[2] = sector & 0xFF; |
| 137 | command[3] = (sector >> 8) & 0xFF; |
| 138 | command[4] = (sector >> 16) & 0xFF; |
| 139 | |
| 140 | command[5] = 0xE0 + (info->lun << 4); |
| 141 | command[5] |= (sector >> 24) & 0x0F; |
| 142 | command[6] = 0x20; |
| 143 | command[7] = 0x01; |
| 144 | |
| 145 | // send the read command |
| 146 | result = datafab_bulk_write(us, command, 8); |
| 147 | if (result != USB_STOR_XFER_GOOD) |
| 148 | goto leave; |
| 149 | |
| 150 | // read the result |
| 151 | result = datafab_bulk_read(us, buffer, len); |
| 152 | if (result != USB_STOR_XFER_GOOD) |
| 153 | goto leave; |
| 154 | |
| 155 | // Store the data in the transfer buffer |
| 156 | usb_stor_access_xfer_buf(buffer, len, us->srb, |
Jens Axboe | 1f6f31a | 2007-05-11 12:33:09 +0200 | [diff] [blame] | 157 | &sg, &sg_offset, TO_XFER_BUF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | sector += thistime; |
| 160 | totallen -= len; |
| 161 | } while (totallen > 0); |
| 162 | |
| 163 | kfree(buffer); |
| 164 | return USB_STOR_TRANSPORT_GOOD; |
| 165 | |
| 166 | leave: |
| 167 | kfree(buffer); |
| 168 | return USB_STOR_TRANSPORT_ERROR; |
| 169 | } |
| 170 | |
| 171 | |
| 172 | static int datafab_write_data(struct us_data *us, |
| 173 | struct datafab_info *info, |
| 174 | u32 sector, |
| 175 | u32 sectors) |
| 176 | { |
| 177 | unsigned char *command = us->iobuf; |
| 178 | unsigned char *reply = us->iobuf; |
| 179 | unsigned char *buffer; |
| 180 | unsigned char thistime; |
| 181 | unsigned int totallen, alloclen; |
| 182 | int len, result; |
Jens Axboe | 1f6f31a | 2007-05-11 12:33:09 +0200 | [diff] [blame] | 183 | unsigned int sg_offset = 0; |
| 184 | struct scatterlist *sg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | // we're working in LBA mode. according to the ATA spec, |
| 187 | // we can support up to 28-bit addressing. I don't know if Datafab |
| 188 | // supports beyond 24-bit addressing. It's kind of hard to test |
| 189 | // since it requires > 8GB CF card. |
| 190 | // |
| 191 | if (sectors > 0x0FFFFFFF) |
| 192 | return USB_STOR_TRANSPORT_ERROR; |
| 193 | |
| 194 | if (info->lun == -1) { |
| 195 | result = datafab_determine_lun(us, info); |
| 196 | if (result != USB_STOR_TRANSPORT_GOOD) |
| 197 | return result; |
| 198 | } |
| 199 | |
| 200 | totallen = sectors * info->ssize; |
| 201 | |
| 202 | // Since we don't write more than 64 KB at a time, we have to create |
| 203 | // a bounce buffer and move the data a piece at a time between the |
| 204 | // bounce buffer and the actual transfer buffer. |
| 205 | |
| 206 | alloclen = min(totallen, 65536u); |
| 207 | buffer = kmalloc(alloclen, GFP_NOIO); |
| 208 | if (buffer == NULL) |
| 209 | return USB_STOR_TRANSPORT_ERROR; |
| 210 | |
| 211 | do { |
| 212 | // loop, never allocate or transfer more than 64k at once |
| 213 | // (min(128k, 255*info->ssize) is the real limit) |
| 214 | |
| 215 | len = min(totallen, alloclen); |
| 216 | thistime = (len / info->ssize) & 0xff; |
| 217 | |
| 218 | // Get the data from the transfer buffer |
| 219 | usb_stor_access_xfer_buf(buffer, len, us->srb, |
Jens Axboe | 1f6f31a | 2007-05-11 12:33:09 +0200 | [diff] [blame] | 220 | &sg, &sg_offset, FROM_XFER_BUF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | command[0] = 0; |
| 223 | command[1] = thistime; |
| 224 | command[2] = sector & 0xFF; |
| 225 | command[3] = (sector >> 8) & 0xFF; |
| 226 | command[4] = (sector >> 16) & 0xFF; |
| 227 | |
| 228 | command[5] = 0xE0 + (info->lun << 4); |
| 229 | command[5] |= (sector >> 24) & 0x0F; |
| 230 | command[6] = 0x30; |
| 231 | command[7] = 0x02; |
| 232 | |
| 233 | // send the command |
| 234 | result = datafab_bulk_write(us, command, 8); |
| 235 | if (result != USB_STOR_XFER_GOOD) |
| 236 | goto leave; |
| 237 | |
| 238 | // send the data |
| 239 | result = datafab_bulk_write(us, buffer, len); |
| 240 | if (result != USB_STOR_XFER_GOOD) |
| 241 | goto leave; |
| 242 | |
| 243 | // read the result |
| 244 | result = datafab_bulk_read(us, reply, 2); |
| 245 | if (result != USB_STOR_XFER_GOOD) |
| 246 | goto leave; |
| 247 | |
| 248 | if (reply[0] != 0x50 && reply[1] != 0) { |
| 249 | US_DEBUGP("datafab_write_data: Gah! " |
| 250 | "write return code: %02x %02x\n", |
| 251 | reply[0], reply[1]); |
| 252 | result = USB_STOR_TRANSPORT_ERROR; |
| 253 | goto leave; |
| 254 | } |
| 255 | |
| 256 | sector += thistime; |
| 257 | totallen -= len; |
| 258 | } while (totallen > 0); |
| 259 | |
| 260 | kfree(buffer); |
| 261 | return USB_STOR_TRANSPORT_GOOD; |
| 262 | |
| 263 | leave: |
| 264 | kfree(buffer); |
| 265 | return USB_STOR_TRANSPORT_ERROR; |
| 266 | } |
| 267 | |
| 268 | |
| 269 | static int datafab_determine_lun(struct us_data *us, |
| 270 | struct datafab_info *info) |
| 271 | { |
| 272 | // Dual-slot readers can be thought of as dual-LUN devices. |
| 273 | // We need to determine which card slot is being used. |
| 274 | // We'll send an IDENTIFY DEVICE command and see which LUN responds... |
| 275 | // |
| 276 | // There might be a better way of doing this? |
| 277 | |
| 278 | static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; |
| 279 | unsigned char *command = us->iobuf; |
| 280 | unsigned char *buf; |
| 281 | int count = 0, rc; |
| 282 | |
| 283 | if (!us || !info) |
| 284 | return USB_STOR_TRANSPORT_ERROR; |
| 285 | |
| 286 | memcpy(command, scommand, 8); |
| 287 | buf = kmalloc(512, GFP_NOIO); |
| 288 | if (!buf) |
| 289 | return USB_STOR_TRANSPORT_ERROR; |
| 290 | |
| 291 | US_DEBUGP("datafab_determine_lun: locating...\n"); |
| 292 | |
| 293 | // we'll try 3 times before giving up... |
| 294 | // |
| 295 | while (count++ < 3) { |
| 296 | command[5] = 0xa0; |
| 297 | |
| 298 | rc = datafab_bulk_write(us, command, 8); |
| 299 | if (rc != USB_STOR_XFER_GOOD) { |
| 300 | rc = USB_STOR_TRANSPORT_ERROR; |
| 301 | goto leave; |
| 302 | } |
| 303 | |
| 304 | rc = datafab_bulk_read(us, buf, 512); |
| 305 | if (rc == USB_STOR_XFER_GOOD) { |
| 306 | info->lun = 0; |
| 307 | rc = USB_STOR_TRANSPORT_GOOD; |
| 308 | goto leave; |
| 309 | } |
| 310 | |
| 311 | command[5] = 0xb0; |
| 312 | |
| 313 | rc = datafab_bulk_write(us, command, 8); |
| 314 | if (rc != USB_STOR_XFER_GOOD) { |
| 315 | rc = USB_STOR_TRANSPORT_ERROR; |
| 316 | goto leave; |
| 317 | } |
| 318 | |
| 319 | rc = datafab_bulk_read(us, buf, 512); |
| 320 | if (rc == USB_STOR_XFER_GOOD) { |
| 321 | info->lun = 1; |
| 322 | rc = USB_STOR_TRANSPORT_GOOD; |
| 323 | goto leave; |
| 324 | } |
| 325 | |
| 326 | msleep(20); |
| 327 | } |
| 328 | |
| 329 | rc = USB_STOR_TRANSPORT_ERROR; |
| 330 | |
| 331 | leave: |
| 332 | kfree(buf); |
| 333 | return rc; |
| 334 | } |
| 335 | |
| 336 | static int datafab_id_device(struct us_data *us, |
| 337 | struct datafab_info *info) |
| 338 | { |
| 339 | // this is a variation of the ATA "IDENTIFY DEVICE" command...according |
| 340 | // to the ATA spec, 'Sector Count' isn't used but the Windows driver |
| 341 | // sets this bit so we do too... |
| 342 | // |
| 343 | static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; |
| 344 | unsigned char *command = us->iobuf; |
| 345 | unsigned char *reply; |
| 346 | int rc; |
| 347 | |
| 348 | if (!us || !info) |
| 349 | return USB_STOR_TRANSPORT_ERROR; |
| 350 | |
| 351 | if (info->lun == -1) { |
| 352 | rc = datafab_determine_lun(us, info); |
| 353 | if (rc != USB_STOR_TRANSPORT_GOOD) |
| 354 | return rc; |
| 355 | } |
| 356 | |
| 357 | memcpy(command, scommand, 8); |
| 358 | reply = kmalloc(512, GFP_NOIO); |
| 359 | if (!reply) |
| 360 | return USB_STOR_TRANSPORT_ERROR; |
| 361 | |
| 362 | command[5] += (info->lun << 4); |
| 363 | |
| 364 | rc = datafab_bulk_write(us, command, 8); |
| 365 | if (rc != USB_STOR_XFER_GOOD) { |
| 366 | rc = USB_STOR_TRANSPORT_ERROR; |
| 367 | goto leave; |
| 368 | } |
| 369 | |
| 370 | // we'll go ahead and extract the media capacity while we're here... |
| 371 | // |
| 372 | rc = datafab_bulk_read(us, reply, 512); |
| 373 | if (rc == USB_STOR_XFER_GOOD) { |
| 374 | // capacity is at word offset 57-58 |
| 375 | // |
| 376 | info->sectors = ((u32)(reply[117]) << 24) | |
| 377 | ((u32)(reply[116]) << 16) | |
| 378 | ((u32)(reply[115]) << 8) | |
| 379 | ((u32)(reply[114]) ); |
| 380 | rc = USB_STOR_TRANSPORT_GOOD; |
| 381 | goto leave; |
| 382 | } |
| 383 | |
| 384 | rc = USB_STOR_TRANSPORT_ERROR; |
| 385 | |
| 386 | leave: |
| 387 | kfree(reply); |
| 388 | return rc; |
| 389 | } |
| 390 | |
| 391 | |
| 392 | static int datafab_handle_mode_sense(struct us_data *us, |
| 393 | struct scsi_cmnd * srb, |
| 394 | int sense_6) |
| 395 | { |
| 396 | static unsigned char rw_err_page[12] = { |
| 397 | 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0 |
| 398 | }; |
| 399 | static unsigned char cache_page[12] = { |
| 400 | 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
| 401 | }; |
| 402 | static unsigned char rbac_page[12] = { |
| 403 | 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0 |
| 404 | }; |
| 405 | static unsigned char timer_page[8] = { |
| 406 | 0x1C, 0x6, 0, 0, 0, 0 |
| 407 | }; |
| 408 | unsigned char pc, page_code; |
| 409 | unsigned int i = 0; |
| 410 | struct datafab_info *info = (struct datafab_info *) (us->extra); |
| 411 | unsigned char *ptr = us->iobuf; |
| 412 | |
| 413 | // most of this stuff is just a hack to get things working. the |
| 414 | // datafab reader doesn't present a SCSI interface so we |
| 415 | // fudge the SCSI commands... |
| 416 | // |
| 417 | |
| 418 | pc = srb->cmnd[2] >> 6; |
| 419 | page_code = srb->cmnd[2] & 0x3F; |
| 420 | |
| 421 | switch (pc) { |
| 422 | case 0x0: |
| 423 | US_DEBUGP("datafab_handle_mode_sense: Current values\n"); |
| 424 | break; |
| 425 | case 0x1: |
| 426 | US_DEBUGP("datafab_handle_mode_sense: Changeable values\n"); |
| 427 | break; |
| 428 | case 0x2: |
| 429 | US_DEBUGP("datafab_handle_mode_sense: Default values\n"); |
| 430 | break; |
| 431 | case 0x3: |
| 432 | US_DEBUGP("datafab_handle_mode_sense: Saves values\n"); |
| 433 | break; |
| 434 | } |
| 435 | |
| 436 | memset(ptr, 0, 8); |
| 437 | if (sense_6) { |
| 438 | ptr[2] = 0x00; // WP enable: 0x80 |
| 439 | i = 4; |
| 440 | } else { |
| 441 | ptr[3] = 0x00; // WP enable: 0x80 |
| 442 | i = 8; |
| 443 | } |
| 444 | |
| 445 | switch (page_code) { |
| 446 | default: |
| 447 | // vendor-specific mode |
| 448 | info->sense_key = 0x05; |
| 449 | info->sense_asc = 0x24; |
| 450 | info->sense_ascq = 0x00; |
| 451 | return USB_STOR_TRANSPORT_FAILED; |
| 452 | |
| 453 | case 0x1: |
| 454 | memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); |
| 455 | i += sizeof(rw_err_page); |
| 456 | break; |
| 457 | |
| 458 | case 0x8: |
| 459 | memcpy(ptr + i, cache_page, sizeof(cache_page)); |
| 460 | i += sizeof(cache_page); |
| 461 | break; |
| 462 | |
| 463 | case 0x1B: |
| 464 | memcpy(ptr + i, rbac_page, sizeof(rbac_page)); |
| 465 | i += sizeof(rbac_page); |
| 466 | break; |
| 467 | |
| 468 | case 0x1C: |
| 469 | memcpy(ptr + i, timer_page, sizeof(timer_page)); |
| 470 | i += sizeof(timer_page); |
| 471 | break; |
| 472 | |
| 473 | case 0x3F: // retrieve all pages |
| 474 | memcpy(ptr + i, timer_page, sizeof(timer_page)); |
| 475 | i += sizeof(timer_page); |
| 476 | memcpy(ptr + i, rbac_page, sizeof(rbac_page)); |
| 477 | i += sizeof(rbac_page); |
| 478 | memcpy(ptr + i, cache_page, sizeof(cache_page)); |
| 479 | i += sizeof(cache_page); |
| 480 | memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); |
| 481 | i += sizeof(rw_err_page); |
| 482 | break; |
| 483 | } |
| 484 | |
| 485 | if (sense_6) |
| 486 | ptr[0] = i - 1; |
| 487 | else |
| 488 | ((__be16 *) ptr)[0] = cpu_to_be16(i - 2); |
| 489 | usb_stor_set_xfer_buf(ptr, i, srb); |
| 490 | |
| 491 | return USB_STOR_TRANSPORT_GOOD; |
| 492 | } |
| 493 | |
| 494 | static void datafab_info_destructor(void *extra) |
| 495 | { |
| 496 | // this routine is a placeholder... |
| 497 | // currently, we don't allocate any extra memory so we're okay |
| 498 | } |
| 499 | |
| 500 | |
| 501 | // Transport for the Datafab MDCFE-B |
| 502 | // |
| 503 | int datafab_transport(struct scsi_cmnd * srb, struct us_data *us) |
| 504 | { |
| 505 | struct datafab_info *info; |
| 506 | int rc; |
| 507 | unsigned long block, blocks; |
| 508 | unsigned char *ptr = us->iobuf; |
| 509 | static unsigned char inquiry_reply[8] = { |
| 510 | 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00 |
| 511 | }; |
| 512 | |
| 513 | if (!us->extra) { |
Oliver Neukum | 887c256 | 2006-01-08 12:33:45 +0100 | [diff] [blame] | 514 | us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | if (!us->extra) { |
| 516 | US_DEBUGP("datafab_transport: Gah! " |
| 517 | "Can't allocate storage for Datafab info struct!\n"); |
| 518 | return USB_STOR_TRANSPORT_ERROR; |
| 519 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | us->extra_destructor = datafab_info_destructor; |
| 521 | ((struct datafab_info *)us->extra)->lun = -1; |
| 522 | } |
| 523 | |
| 524 | info = (struct datafab_info *) (us->extra); |
| 525 | |
| 526 | if (srb->cmnd[0] == INQUIRY) { |
| 527 | US_DEBUGP("datafab_transport: INQUIRY. Returning bogus response"); |
| 528 | memcpy(ptr, inquiry_reply, sizeof(inquiry_reply)); |
| 529 | fill_inquiry_response(us, ptr, 36); |
| 530 | return USB_STOR_TRANSPORT_GOOD; |
| 531 | } |
| 532 | |
| 533 | if (srb->cmnd[0] == READ_CAPACITY) { |
| 534 | info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec |
| 535 | rc = datafab_id_device(us, info); |
| 536 | if (rc != USB_STOR_TRANSPORT_GOOD) |
| 537 | return rc; |
| 538 | |
| 539 | US_DEBUGP("datafab_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n", |
| 540 | info->sectors, info->ssize); |
| 541 | |
| 542 | // build the reply |
| 543 | // we need the last sector, not the number of sectors |
| 544 | ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1); |
| 545 | ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize); |
| 546 | usb_stor_set_xfer_buf(ptr, 8, srb); |
| 547 | |
| 548 | return USB_STOR_TRANSPORT_GOOD; |
| 549 | } |
| 550 | |
| 551 | if (srb->cmnd[0] == MODE_SELECT_10) { |
| 552 | US_DEBUGP("datafab_transport: Gah! MODE_SELECT_10.\n"); |
| 553 | return USB_STOR_TRANSPORT_ERROR; |
| 554 | } |
| 555 | |
| 556 | // don't bother implementing READ_6 or WRITE_6. |
| 557 | // |
| 558 | if (srb->cmnd[0] == READ_10) { |
| 559 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
| 560 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
| 561 | |
| 562 | blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); |
| 563 | |
| 564 | US_DEBUGP("datafab_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks); |
| 565 | return datafab_read_data(us, info, block, blocks); |
| 566 | } |
| 567 | |
| 568 | if (srb->cmnd[0] == READ_12) { |
| 569 | // we'll probably never see a READ_12 but we'll do it anyway... |
| 570 | // |
| 571 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
| 572 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
| 573 | |
| 574 | blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | |
| 575 | ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); |
| 576 | |
| 577 | US_DEBUGP("datafab_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks); |
| 578 | return datafab_read_data(us, info, block, blocks); |
| 579 | } |
| 580 | |
| 581 | if (srb->cmnd[0] == WRITE_10) { |
| 582 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
| 583 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
| 584 | |
| 585 | blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); |
| 586 | |
| 587 | US_DEBUGP("datafab_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks); |
| 588 | return datafab_write_data(us, info, block, blocks); |
| 589 | } |
| 590 | |
| 591 | if (srb->cmnd[0] == WRITE_12) { |
| 592 | // we'll probably never see a WRITE_12 but we'll do it anyway... |
| 593 | // |
| 594 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
| 595 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
| 596 | |
| 597 | blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | |
| 598 | ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); |
| 599 | |
| 600 | US_DEBUGP("datafab_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks); |
| 601 | return datafab_write_data(us, info, block, blocks); |
| 602 | } |
| 603 | |
| 604 | if (srb->cmnd[0] == TEST_UNIT_READY) { |
| 605 | US_DEBUGP("datafab_transport: TEST_UNIT_READY.\n"); |
| 606 | return datafab_id_device(us, info); |
| 607 | } |
| 608 | |
| 609 | if (srb->cmnd[0] == REQUEST_SENSE) { |
| 610 | US_DEBUGP("datafab_transport: REQUEST_SENSE. Returning faked response\n"); |
| 611 | |
| 612 | // this response is pretty bogus right now. eventually if necessary |
| 613 | // we can set the correct sense data. so far though it hasn't been |
| 614 | // necessary |
| 615 | // |
| 616 | memset(ptr, 0, 18); |
| 617 | ptr[0] = 0xF0; |
| 618 | ptr[2] = info->sense_key; |
| 619 | ptr[7] = 11; |
| 620 | ptr[12] = info->sense_asc; |
| 621 | ptr[13] = info->sense_ascq; |
| 622 | usb_stor_set_xfer_buf(ptr, 18, srb); |
| 623 | |
| 624 | return USB_STOR_TRANSPORT_GOOD; |
| 625 | } |
| 626 | |
| 627 | if (srb->cmnd[0] == MODE_SENSE) { |
| 628 | US_DEBUGP("datafab_transport: MODE_SENSE_6 detected\n"); |
| 629 | return datafab_handle_mode_sense(us, srb, 1); |
| 630 | } |
| 631 | |
| 632 | if (srb->cmnd[0] == MODE_SENSE_10) { |
| 633 | US_DEBUGP("datafab_transport: MODE_SENSE_10 detected\n"); |
| 634 | return datafab_handle_mode_sense(us, srb, 0); |
| 635 | } |
| 636 | |
| 637 | if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { |
| 638 | // sure. whatever. not like we can stop the user from |
| 639 | // popping the media out of the device (no locking doors, etc) |
| 640 | // |
| 641 | return USB_STOR_TRANSPORT_GOOD; |
| 642 | } |
| 643 | |
| 644 | if (srb->cmnd[0] == START_STOP) { |
| 645 | /* this is used by sd.c'check_scsidisk_media_change to detect |
| 646 | media change */ |
| 647 | US_DEBUGP("datafab_transport: START_STOP.\n"); |
| 648 | /* the first datafab_id_device after a media change returns |
| 649 | an error (determined experimentally) */ |
| 650 | rc = datafab_id_device(us, info); |
| 651 | if (rc == USB_STOR_TRANSPORT_GOOD) { |
| 652 | info->sense_key = NO_SENSE; |
| 653 | srb->result = SUCCESS; |
| 654 | } else { |
| 655 | info->sense_key = UNIT_ATTENTION; |
| 656 | srb->result = SAM_STAT_CHECK_CONDITION; |
| 657 | } |
| 658 | return rc; |
| 659 | } |
| 660 | |
| 661 | US_DEBUGP("datafab_transport: Gah! Unknown command: %d (0x%x)\n", |
| 662 | srb->cmnd[0], srb->cmnd[0]); |
| 663 | info->sense_key = 0x05; |
| 664 | info->sense_asc = 0x20; |
| 665 | info->sense_ascq = 0x00; |
| 666 | return USB_STOR_TRANSPORT_FAILED; |
| 667 | } |