ide-cd.c revision c4c69e21b51005e24e2fc4efc8a73460a5ab7799
1/* 2 * ATAPI CD-ROM driver. 3 * 4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov> 5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> 6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> 7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz 8 * 9 * May be copied or modified under the terms of the GNU General Public 10 * License. See linux/COPYING for more information. 11 * 12 * See Documentation/cdrom/ide-cd for usage information. 13 * 14 * Suggestions are welcome. Patches that work are more welcome though. ;-) 15 * 16 * Documentation: 17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards. 18 * 19 * For historical changelog please see: 20 * Documentation/ide/ChangeLog.ide-cd.1994-2004 21 */ 22 23#define DRV_NAME "ide-cd" 24#define PFX DRV_NAME ": " 25 26#define IDECD_VERSION "5.00" 27 28#include <linux/module.h> 29#include <linux/types.h> 30#include <linux/kernel.h> 31#include <linux/delay.h> 32#include <linux/timer.h> 33#include <linux/slab.h> 34#include <linux/interrupt.h> 35#include <linux/errno.h> 36#include <linux/cdrom.h> 37#include <linux/ide.h> 38#include <linux/completion.h> 39#include <linux/mutex.h> 40#include <linux/bcd.h> 41 42/* For SCSI -> ATAPI command conversion */ 43#include <scsi/scsi.h> 44 45#include <linux/irq.h> 46#include <linux/io.h> 47#include <asm/byteorder.h> 48#include <linux/uaccess.h> 49#include <asm/unaligned.h> 50 51#include "ide-cd.h" 52 53static DEFINE_MUTEX(idecd_ref_mutex); 54 55static void ide_cd_release(struct device *); 56 57static struct cdrom_info *ide_cd_get(struct gendisk *disk) 58{ 59 struct cdrom_info *cd = NULL; 60 61 mutex_lock(&idecd_ref_mutex); 62 cd = ide_drv_g(disk, cdrom_info); 63 if (cd) { 64 if (ide_device_get(cd->drive)) 65 cd = NULL; 66 else 67 get_device(&cd->dev); 68 69 } 70 mutex_unlock(&idecd_ref_mutex); 71 return cd; 72} 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 ide_drive_t *drive = cd->drive; 77 78 mutex_lock(&idecd_ref_mutex); 79 put_device(&cd->dev); 80 ide_device_put(drive); 81 mutex_unlock(&idecd_ref_mutex); 82} 83 84/* 85 * Generic packet command support and error handling routines. 86 */ 87 88/* Mark that we've seen a media change and invalidate our internal buffers. */ 89static void cdrom_saw_media_change(ide_drive_t *drive) 90{ 91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 93} 94 95static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 96 struct request_sense *sense) 97{ 98 int log = 0; 99 100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 101 102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 103 return 0; 104 105 switch (sense->sense_key) { 106 case NO_SENSE: 107 case RECOVERED_ERROR: 108 break; 109 case NOT_READY: 110 /* 111 * don't care about tray state messages for e.g. capacity 112 * commands or in-progress or becoming ready 113 */ 114 if (sense->asc == 0x3a || sense->asc == 0x04) 115 break; 116 log = 1; 117 break; 118 case ILLEGAL_REQUEST: 119 /* 120 * don't log START_STOP unit with LoEj set, since we cannot 121 * reliably check if drive can auto-close 122 */ 123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 124 break; 125 log = 1; 126 break; 127 case UNIT_ATTENTION: 128 /* 129 * Make good and sure we've seen this potential media change. 130 * Some drives (i.e. Creative) fail to present the correct sense 131 * key in the error register. 132 */ 133 cdrom_saw_media_change(drive); 134 break; 135 default: 136 log = 1; 137 break; 138 } 139 return log; 140} 141 142static void cdrom_analyze_sense_data(ide_drive_t *drive, 143 struct request *failed_command, 144 struct request_sense *sense) 145{ 146 unsigned long sector; 147 unsigned long bio_sectors; 148 struct cdrom_info *info = drive->driver_data; 149 150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x", 151 sense->error_code, sense->sense_key); 152 153 if (failed_command) 154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x", 155 failed_command->cmd[0]); 156 157 if (!cdrom_log_sense(drive, failed_command, sense)) 158 return; 159 160 /* 161 * If a read toc is executed for a CD-R or CD-RW medium where the first 162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 163 * confusing error) 164 */ 165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 166 if (sense->sense_key == 0x05 && sense->asc == 0x24) 167 return; 168 169 /* current error */ 170 if (sense->error_code == 0x70) { 171 switch (sense->sense_key) { 172 case MEDIUM_ERROR: 173 case VOLUME_OVERFLOW: 174 case ILLEGAL_REQUEST: 175 if (!sense->valid) 176 break; 177 if (failed_command == NULL || 178 !blk_fs_request(failed_command)) 179 break; 180 sector = (sense->information[0] << 24) | 181 (sense->information[1] << 16) | 182 (sense->information[2] << 8) | 183 (sense->information[3]); 184 185 if (drive->queue->hardsect_size == 2048) 186 /* device sector size is 2K */ 187 sector <<= 2; 188 189 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 190 sector &= ~(bio_sectors - 1); 191 192 /* 193 * The SCSI specification allows for the value 194 * returned by READ CAPACITY to be up to 75 2K 195 * sectors past the last readable block. 196 * Therefore, if we hit a medium error within the 197 * last 75 2K sectors, we decrease the saved size 198 * value. 199 */ 200 if (sector < get_capacity(info->disk) && 201 drive->probed_capacity - sector < 4 * 75) 202 set_capacity(info->disk, sector); 203 } 204 } 205 206 ide_cd_log_error(drive->name, failed_command, sense); 207} 208 209static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 210 struct request *failed_command) 211{ 212 struct cdrom_info *info = drive->driver_data; 213 struct request *rq = &drive->request_sense_rq; 214 215 ide_debug_log(IDE_DBG_SENSE, "enter"); 216 217 if (sense == NULL) 218 sense = &info->sense_data; 219 220 /* stuff the sense request in front of our current request */ 221 blk_rq_init(NULL, rq); 222 rq->cmd_type = REQ_TYPE_ATA_PC; 223 rq->rq_disk = info->disk; 224 225 rq->data = sense; 226 rq->cmd[0] = GPCMD_REQUEST_SENSE; 227 rq->cmd[4] = 18; 228 rq->data_len = 18; 229 230 rq->cmd_type = REQ_TYPE_SENSE; 231 rq->cmd_flags |= REQ_PREEMPT; 232 233 /* NOTE! Save the failed command in "rq->buffer" */ 234 rq->buffer = (void *) failed_command; 235 236 if (failed_command) 237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x", 238 failed_command->cmd[0]); 239 240 drive->hwif->rq = NULL; 241 242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); 243} 244 245static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 246{ 247 /* 248 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 249 * failed request 250 */ 251 struct request *failed = (struct request *)rq->buffer; 252 struct cdrom_info *info = drive->driver_data; 253 void *sense = &info->sense_data; 254 255 if (failed) { 256 if (failed->sense) { 257 sense = failed->sense; 258 failed->sense_len = rq->sense_len; 259 } 260 cdrom_analyze_sense_data(drive, failed, sense); 261 262 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 263 BUG(); 264 } else 265 cdrom_analyze_sense_data(drive, NULL, sense); 266} 267 268/* 269 * Returns: 270 * 0: if the request should be continued. 271 * 1: if the request will be going through error recovery. 272 * 2: if the request should be ended. 273 */ 274static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 275{ 276 ide_hwif_t *hwif = drive->hwif; 277 struct request *rq = hwif->rq; 278 int stat, err, sense_key; 279 280 /* check for errors */ 281 stat = hwif->tp_ops->read_status(hwif); 282 283 if (stat_ret) 284 *stat_ret = stat; 285 286 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 287 return 0; 288 289 /* get the IDE error register */ 290 err = ide_read_error(drive); 291 sense_key = err >> 4; 292 293 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, " 294 "rq->cmd_type: 0x%x, err: 0x%x", 295 stat, good_stat, rq->cmd[0], rq->cmd_type, 296 err); 297 298 if (blk_sense_request(rq)) { 299 /* 300 * We got an error trying to get sense info from the drive 301 * (probably while trying to recover from a former error). 302 * Just give up. 303 */ 304 rq->cmd_flags |= REQ_FAILED; 305 return 2; 306 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 307 /* All other functions, except for READ. */ 308 309 /* 310 * if we have an error, pass back CHECK_CONDITION as the 311 * scsi status byte 312 */ 313 if (blk_pc_request(rq) && !rq->errors) 314 rq->errors = SAM_STAT_CHECK_CONDITION; 315 316 /* check for tray open */ 317 if (sense_key == NOT_READY) { 318 cdrom_saw_media_change(drive); 319 } else if (sense_key == UNIT_ATTENTION) { 320 /* check for media change */ 321 cdrom_saw_media_change(drive); 322 return 0; 323 } else if (sense_key == ILLEGAL_REQUEST && 324 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 325 /* 326 * Don't print error message for this condition-- 327 * SFF8090i indicates that 5/24/00 is the correct 328 * response to a request to close the tray if the 329 * drive doesn't have that capability. 330 * cdrom_log_sense() knows this! 331 */ 332 } else if (!(rq->cmd_flags & REQ_QUIET)) { 333 /* otherwise, print an error */ 334 ide_dump_status(drive, "packet command error", stat); 335 } 336 337 rq->cmd_flags |= REQ_FAILED; 338 339 /* 340 * instead of playing games with moving completions around, 341 * remove failed request completely and end it when the 342 * request sense has completed 343 */ 344 goto end_request; 345 346 } else if (blk_fs_request(rq)) { 347 int do_end_request = 0; 348 349 /* handle errors from READ and WRITE requests */ 350 351 if (blk_noretry_request(rq)) 352 do_end_request = 1; 353 354 if (sense_key == NOT_READY) { 355 /* tray open */ 356 if (rq_data_dir(rq) == READ) { 357 cdrom_saw_media_change(drive); 358 359 /* fail the request */ 360 printk(KERN_ERR PFX "%s: tray open\n", 361 drive->name); 362 do_end_request = 1; 363 } else { 364 struct cdrom_info *info = drive->driver_data; 365 366 /* 367 * Allow the drive 5 seconds to recover, some 368 * devices will return this error while flushing 369 * data from cache. 370 */ 371 if (!rq->errors) 372 info->write_timeout = jiffies + 373 ATAPI_WAIT_WRITE_BUSY; 374 rq->errors = 1; 375 if (time_after(jiffies, info->write_timeout)) 376 do_end_request = 1; 377 else { 378 struct request_queue *q = drive->queue; 379 unsigned long flags; 380 381 /* 382 * take a breather relying on the unplug 383 * timer to kick us again 384 */ 385 spin_lock_irqsave(q->queue_lock, flags); 386 blk_plug_device(q); 387 spin_unlock_irqrestore(q->queue_lock, flags); 388 389 return 1; 390 } 391 } 392 } else if (sense_key == UNIT_ATTENTION) { 393 /* media change */ 394 cdrom_saw_media_change(drive); 395 396 /* 397 * Arrange to retry the request but be sure to give up 398 * if we've retried too many times. 399 */ 400 if (++rq->errors > ERROR_MAX) 401 do_end_request = 1; 402 } else if (sense_key == ILLEGAL_REQUEST || 403 sense_key == DATA_PROTECT) { 404 /* 405 * No point in retrying after an illegal request or data 406 * protect error. 407 */ 408 ide_dump_status(drive, "command error", stat); 409 do_end_request = 1; 410 } else if (sense_key == MEDIUM_ERROR) { 411 /* 412 * No point in re-trying a zillion times on a bad 413 * sector. If we got here the error is not correctable. 414 */ 415 ide_dump_status(drive, "media error (bad sector)", 416 stat); 417 do_end_request = 1; 418 } else if (sense_key == BLANK_CHECK) { 419 /* disk appears blank ?? */ 420 ide_dump_status(drive, "media error (blank)", stat); 421 do_end_request = 1; 422 } else if ((err & ~ATA_ABORTED) != 0) { 423 /* go to the default handler for other errors */ 424 ide_error(drive, "cdrom_decode_status", stat); 425 return 1; 426 } else if ((++rq->errors > ERROR_MAX)) { 427 /* we've racked up too many retries, abort */ 428 do_end_request = 1; 429 } 430 431 /* 432 * End a request through request sense analysis when we have 433 * sense data. We need this in order to perform end of media 434 * processing. 435 */ 436 if (do_end_request) 437 goto end_request; 438 439 /* 440 * If we got a CHECK_CONDITION status, queue 441 * a request sense command. 442 */ 443 if (stat & ATA_ERR) 444 cdrom_queue_request_sense(drive, NULL, NULL); 445 return 1; 446 } else { 447 blk_dump_rq_flags(rq, PFX "bad rq"); 448 return 2; 449 } 450 451end_request: 452 if (stat & ATA_ERR) { 453 struct request_queue *q = drive->queue; 454 unsigned long flags; 455 456 spin_lock_irqsave(q->queue_lock, flags); 457 blkdev_dequeue_request(rq); 458 spin_unlock_irqrestore(q->queue_lock, flags); 459 460 hwif->rq = NULL; 461 462 cdrom_queue_request_sense(drive, rq->sense, rq); 463 return 1; 464 } else 465 return 2; 466} 467 468/* 469 * Check the contents of the interrupt reason register from the cdrom 470 * and attempt to recover if there are problems. Returns 0 if everything's 471 * ok; nonzero if the request has been terminated. 472 */ 473static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 474 int len, int ireason, int rw) 475{ 476 ide_hwif_t *hwif = drive->hwif; 477 478 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 479 480 /* 481 * ireason == 0: the drive wants to receive data from us 482 * ireason == 2: the drive is expecting to transfer data to us 483 */ 484 if (ireason == (!rw << 1)) 485 return 0; 486 else if (ireason == (rw << 1)) { 487 488 /* whoops... */ 489 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 490 drive->name, __func__); 491 492 ide_pad_transfer(drive, rw, len); 493 } else if (rw == 0 && ireason == 1) { 494 /* 495 * Some drives (ASUS) seem to tell us that status info is 496 * available. Just get it and ignore. 497 */ 498 (void)hwif->tp_ops->read_status(hwif); 499 return 0; 500 } else { 501 /* drive wants a command packet, or invalid ireason... */ 502 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 503 drive->name, __func__, ireason); 504 } 505 506 if (rq->cmd_type == REQ_TYPE_ATA_PC) 507 rq->cmd_flags |= REQ_FAILED; 508 509 return -1; 510} 511 512/* 513 * Assume that the drive will always provide data in multiples of at least 514 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 515 */ 516static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 517{ 518 ide_debug_log(IDE_DBG_FUNC, "len: %d", len); 519 520 if ((len % SECTOR_SIZE) == 0) 521 return 0; 522 523 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 524 __func__, len); 525 526 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 527 printk(KERN_ERR PFX "This drive is not supported by this " 528 "version of the driver\n"); 529 else { 530 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 531 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 532 } 533 534 return 1; 535} 536 537static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 538 struct request *rq) 539{ 540 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags); 541 542 if (rq_data_dir(rq) == READ) { 543 unsigned short sectors_per_frame = 544 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 545 int nskip = rq->sector & (sectors_per_frame - 1); 546 547 /* 548 * If the requested sector doesn't start on a frame boundary, 549 * we must adjust the start of the transfer so that it does, 550 * and remember to skip the first few sectors. 551 * 552 * If the rq->current_nr_sectors field is larger than the size 553 * of the buffer, it will mean that we're to skip a number of 554 * sectors equal to the amount by which rq->current_nr_sectors 555 * is larger than the buffer size. 556 */ 557 if (nskip > 0) { 558 /* sanity check... */ 559 if (rq->current_nr_sectors != 560 bio_cur_sectors(rq->bio)) { 561 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 562 drive->name, __func__, 563 rq->current_nr_sectors); 564 return ide_stopped; 565 } 566 rq->current_nr_sectors += nskip; 567 } 568 } 569 570 /* set up the command */ 571 rq->timeout = ATAPI_WAIT_PC; 572 573 return ide_started; 574} 575 576/* 577 * Fix up a possibly partially-processed request so that we can start it over 578 * entirely, or even put it back on the request queue. 579 */ 580static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 581{ 582 583 ide_debug_log(IDE_DBG_FUNC, "enter"); 584 585 if (rq->buffer != bio_data(rq->bio)) { 586 sector_t n = 587 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 588 589 rq->buffer = bio_data(rq->bio); 590 rq->nr_sectors += n; 591 rq->sector -= n; 592 } 593 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 594 rq->hard_cur_sectors = rq->current_nr_sectors; 595 rq->hard_nr_sectors = rq->nr_sectors; 596 rq->hard_sector = rq->sector; 597 rq->q->prep_rq_fn(rq->q, rq); 598} 599 600static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 601{ 602 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 603 604 /* 605 * Some of the trailing request sense fields are optional, 606 * and some drives don't send them. Sigh. 607 */ 608 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 609 rq->data_len > 0 && rq->data_len <= 5) 610 while (rq->data_len > 0) { 611 *(u8 *)rq->data++ = 0; 612 --rq->data_len; 613 } 614} 615 616int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 617 int write, void *buffer, unsigned *bufflen, 618 struct request_sense *sense, int timeout, 619 unsigned int cmd_flags) 620{ 621 struct cdrom_info *info = drive->driver_data; 622 struct request_sense local_sense; 623 int retries = 10; 624 unsigned int flags = 0; 625 626 if (!sense) 627 sense = &local_sense; 628 629 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 630 "cmd_flags: 0x%x", 631 cmd[0], write, timeout, cmd_flags); 632 633 /* start of retry loop */ 634 do { 635 struct request *rq; 636 int error; 637 638 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 639 640 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 641 rq->cmd_type = REQ_TYPE_ATA_PC; 642 rq->sense = sense; 643 rq->cmd_flags |= cmd_flags; 644 rq->timeout = timeout; 645 if (buffer) { 646 rq->data = buffer; 647 rq->data_len = *bufflen; 648 } 649 650 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 651 652 if (buffer) 653 *bufflen = rq->data_len; 654 655 flags = rq->cmd_flags; 656 blk_put_request(rq); 657 658 /* 659 * FIXME: we should probably abort/retry or something in case of 660 * failure. 661 */ 662 if (flags & REQ_FAILED) { 663 /* 664 * The request failed. Retry if it was due to a unit 665 * attention status (usually means media was changed). 666 */ 667 struct request_sense *reqbuf = sense; 668 669 if (reqbuf->sense_key == UNIT_ATTENTION) 670 cdrom_saw_media_change(drive); 671 else if (reqbuf->sense_key == NOT_READY && 672 reqbuf->asc == 4 && reqbuf->ascq != 4) { 673 /* 674 * The drive is in the process of loading 675 * a disk. Retry, but wait a little to give 676 * the drive time to complete the load. 677 */ 678 ssleep(2); 679 } else { 680 /* otherwise, don't retry */ 681 retries = 0; 682 } 683 --retries; 684 } 685 686 /* end of retry loop */ 687 } while ((flags & REQ_FAILED) && retries >= 0); 688 689 /* return an error if the command failed */ 690 return (flags & REQ_FAILED) ? -EIO : 0; 691} 692 693/* 694 * Called from blk_end_request_callback() after the data of the request is 695 * completed and before the request itself is completed. By returning value '1', 696 * blk_end_request_callback() returns immediately without completing it. 697 */ 698static int cdrom_newpc_intr_dummy_cb(struct request *rq) 699{ 700 return 1; 701} 702 703static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 704{ 705 ide_hwif_t *hwif = drive->hwif; 706 struct request *rq = hwif->rq; 707 xfer_func_t *xferfunc; 708 ide_expiry_t *expiry = NULL; 709 int dma_error = 0, dma, stat, thislen, uptodate = 0; 710 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors; 711 int sense = blk_sense_request(rq); 712 unsigned int timeout; 713 u16 len; 714 u8 ireason; 715 716 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 717 rq->cmd[0], write); 718 719 /* check for errors */ 720 dma = drive->dma; 721 if (dma) { 722 drive->dma = 0; 723 dma_error = hwif->dma_ops->dma_end(drive); 724 if (dma_error) { 725 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 726 write ? "write" : "read"); 727 ide_dma_off(drive); 728 } 729 } 730 731 rc = cdrom_decode_status(drive, 0, &stat); 732 if (rc) { 733 if (rc == 2) 734 goto out_end; 735 return ide_stopped; 736 } 737 738 /* using dma, transfer is complete now */ 739 if (dma) { 740 if (dma_error) 741 return ide_error(drive, "dma error", stat); 742 if (blk_fs_request(rq)) { 743 ide_complete_rq(drive, 0, rq->nr_sectors 744 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq)); 745 return ide_stopped; 746 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { 747 ide_complete_rq(drive, 0, 512); 748 return ide_stopped; 749 } 750 if (blk_pc_request(rq) == 0 && uptodate == 0) 751 rq->cmd_flags |= REQ_FAILED; 752 goto out_end; 753 } 754 755 ide_read_bcount_and_ireason(drive, &len, &ireason); 756 757 thislen = blk_fs_request(rq) ? len : rq->data_len; 758 if (thislen > len) 759 thislen = len; 760 761 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 762 stat, thislen); 763 764 /* If DRQ is clear, the command has completed. */ 765 if ((stat & ATA_DRQ) == 0) { 766 if (blk_fs_request(rq)) { 767 /* 768 * If we're not done reading/writing, complain. 769 * Otherwise, complete the command normally. 770 */ 771 uptodate = 1; 772 if (rq->current_nr_sectors > 0) { 773 printk(KERN_ERR PFX "%s: %s: data underrun " 774 "(%d blocks)\n", 775 drive->name, __func__, 776 rq->current_nr_sectors); 777 if (!write) 778 rq->cmd_flags |= REQ_FAILED; 779 uptodate = 0; 780 } 781 } else if (!blk_pc_request(rq)) { 782 ide_cd_request_sense_fixup(drive, rq); 783 /* complain if we still have data left to transfer */ 784 uptodate = rq->data_len ? 0 : 1; 785 if (uptodate == 0) 786 rq->cmd_flags |= REQ_FAILED; 787 } 788 goto out_end; 789 } 790 791 /* check which way to transfer data */ 792 rc = ide_cd_check_ireason(drive, rq, len, ireason, write); 793 if (rc) 794 goto out_end; 795 796 if (blk_fs_request(rq)) { 797 if (write == 0) { 798 int nskip; 799 800 if (ide_cd_check_transfer_size(drive, len)) 801 goto out_end; 802 803 /* 804 * First, figure out if we need to bit-bucket 805 * any of the leading sectors. 806 */ 807 nskip = min_t(int, rq->current_nr_sectors 808 - bio_cur_sectors(rq->bio), 809 thislen >> 9); 810 if (nskip > 0) { 811 ide_pad_transfer(drive, write, nskip << 9); 812 rq->current_nr_sectors -= nskip; 813 thislen -= (nskip << 9); 814 } 815 } 816 } 817 818 if (ireason == 0) { 819 write = 1; 820 xferfunc = hwif->tp_ops->output_data; 821 } else { 822 write = 0; 823 xferfunc = hwif->tp_ops->input_data; 824 } 825 826 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 827 "ireason: 0x%x", 828 rq->cmd_type, ireason); 829 830 /* transfer data */ 831 while (thislen > 0) { 832 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 833 int blen = rq->data_len; 834 835 /* bio backed? */ 836 if (rq->bio) { 837 if (blk_fs_request(rq)) { 838 ptr = rq->buffer; 839 blen = rq->current_nr_sectors << 9; 840 } else { 841 ptr = bio_data(rq->bio); 842 blen = bio_iovec(rq->bio)->bv_len; 843 } 844 } 845 846 if (!ptr) { 847 if (blk_fs_request(rq) && !write) 848 /* 849 * If the buffers are full, pipe the rest into 850 * oblivion. 851 */ 852 ide_pad_transfer(drive, 0, thislen); 853 else { 854 printk(KERN_ERR PFX "%s: confused, missing data\n", 855 drive->name); 856 blk_dump_rq_flags(rq, rq_data_dir(rq) 857 ? "cdrom_newpc_intr, write" 858 : "cdrom_newpc_intr, read"); 859 } 860 break; 861 } 862 863 if (blen > thislen) 864 blen = thislen; 865 866 xferfunc(drive, NULL, ptr, blen); 867 868 thislen -= blen; 869 len -= blen; 870 871 if (blk_fs_request(rq)) { 872 rq->buffer += blen; 873 rq->nr_sectors -= (blen >> 9); 874 rq->current_nr_sectors -= (blen >> 9); 875 rq->sector += (blen >> 9); 876 877 if (rq->current_nr_sectors == 0 && rq->nr_sectors) { 878 nsectors = rq->hard_cur_sectors; 879 880 if (nsectors == 0) 881 nsectors = 1; 882 883 ide_complete_rq(drive, 0, nsectors << 9); 884 } 885 } else { 886 rq->data_len -= blen; 887 888 /* 889 * The request can't be completed until DRQ is cleared. 890 * So complete the data, but don't complete the request 891 * using the dummy function for the callback feature 892 * of blk_end_request_callback(). 893 */ 894 if (rq->bio) 895 blk_end_request_callback(rq, 0, blen, 896 cdrom_newpc_intr_dummy_cb); 897 else 898 rq->data += blen; 899 } 900 if (sense && write == 0) 901 rq->sense_len += blen; 902 } 903 904 /* pad, if necessary */ 905 if (!blk_fs_request(rq) && len > 0) 906 ide_pad_transfer(drive, write, len); 907 908 if (blk_pc_request(rq)) { 909 timeout = rq->timeout; 910 } else { 911 timeout = ATAPI_WAIT_PC; 912 if (!blk_fs_request(rq)) 913 expiry = ide_cd_expiry; 914 } 915 916 hwif->expiry = expiry; 917 ide_set_handler(drive, cdrom_newpc_intr, timeout); 918 return ide_started; 919 920out_end: 921 if (blk_pc_request(rq) && rc == 0) { 922 unsigned int dlen = rq->data_len; 923 924 if (dma) 925 rq->data_len = 0; 926 927 if (blk_end_request(rq, 0, dlen)) 928 BUG(); 929 930 hwif->rq = NULL; 931 } else { 932 if (sense && uptodate) 933 ide_cd_complete_failed_rq(drive, rq); 934 935 if (blk_fs_request(rq)) { 936 if (rq->current_nr_sectors == 0) 937 uptodate = 1; 938 } else { 939 if (uptodate <= 0 && rq->errors == 0) 940 rq->errors = -EIO; 941 } 942 943 /* make sure it's fully ended */ 944 if (blk_pc_request(rq)) 945 nsectors = (rq->data_len + 511) >> 9; 946 else 947 nsectors = rq->hard_cur_sectors; 948 949 if (nsectors == 0) 950 nsectors = 1; 951 952 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 953 954 if (sense && rc == 2) 955 ide_error(drive, "request sense failure", stat); 956 } 957 return ide_stopped; 958} 959 960static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 961{ 962 struct cdrom_info *cd = drive->driver_data; 963 int write = rq_data_dir(rq) == WRITE; 964 unsigned short sectors_per_frame = 965 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 966 967 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, " 968 "secs_per_frame: %u", 969 rq->cmd[0], write, sectors_per_frame); 970 971 if (write) { 972 /* disk has become write protected */ 973 if (get_disk_ro(cd->disk)) 974 return ide_stopped; 975 } else { 976 /* 977 * We may be retrying this request after an error. Fix up any 978 * weirdness which might be present in the request packet. 979 */ 980 ide_cd_restore_request(drive, rq); 981 } 982 983 /* use DMA, if possible / writes *must* be hardware frame aligned */ 984 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 985 (rq->sector & (sectors_per_frame - 1))) { 986 if (write) 987 return ide_stopped; 988 drive->dma = 0; 989 } else 990 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 991 992 if (write) 993 cd->devinfo.media_written = 1; 994 995 return ide_started; 996} 997 998static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 999{ 1000 1001 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 1002 rq->cmd[0], rq->cmd_type); 1003 1004 if (blk_pc_request(rq)) 1005 rq->cmd_flags |= REQ_QUIET; 1006 else 1007 rq->cmd_flags &= ~REQ_FAILED; 1008 1009 drive->dma = 0; 1010 1011 /* sg request */ 1012 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1013 struct request_queue *q = drive->queue; 1014 unsigned int alignment; 1015 char *buf; 1016 1017 if (rq->bio) 1018 buf = bio_data(rq->bio); 1019 else 1020 buf = rq->data; 1021 1022 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1023 1024 /* 1025 * check if dma is safe 1026 * 1027 * NOTE! The "len" and "addr" checks should possibly have 1028 * separate masks. 1029 */ 1030 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1031 if ((unsigned long)buf & alignment 1032 || rq->data_len & q->dma_pad_mask 1033 || object_is_on_stack(buf)) 1034 drive->dma = 0; 1035 } 1036} 1037 1038static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1039 sector_t block) 1040{ 1041 struct ide_cmd cmd; 1042 int uptodate = 0, nsectors; 1043 1044 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 1045 rq->cmd[0], (unsigned long long)block); 1046 1047 if (drive->debug_mask & IDE_DBG_RQ) 1048 blk_dump_rq_flags(rq, "ide_cd_do_request"); 1049 1050 if (blk_fs_request(rq)) { 1051 if (cdrom_start_rw(drive, rq) == ide_stopped || 1052 ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1053 goto out_end; 1054 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1055 rq->cmd_type == REQ_TYPE_ATA_PC) { 1056 if (!rq->timeout) 1057 rq->timeout = ATAPI_WAIT_PC; 1058 1059 cdrom_do_block_pc(drive, rq); 1060 } else if (blk_special_request(rq)) { 1061 /* right now this can only be a reset... */ 1062 uptodate = 1; 1063 goto out_end; 1064 } else { 1065 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1066 goto out_end; 1067 } 1068 1069 memset(&cmd, 0, sizeof(cmd)); 1070 1071 if (rq_data_dir(rq)) 1072 cmd.tf_flags |= IDE_TFLAG_WRITE; 1073 1074 cmd.rq = rq; 1075 1076 return ide_issue_pc(drive, &cmd); 1077out_end: 1078 if (blk_fs_request(rq)) { 1079 if (rq->current_nr_sectors == 0) 1080 uptodate = 1; 1081 } else { 1082 if (uptodate <= 0 && rq->errors == 0) 1083 rq->errors = -EIO; 1084 } 1085 1086 nsectors = rq->hard_nr_sectors; 1087 1088 if (nsectors == 0) 1089 nsectors = 1; 1090 1091 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 1092 1093 return ide_stopped; 1094} 1095 1096/* 1097 * Ioctl handling. 1098 * 1099 * Routines which queue packet commands take as a final argument a pointer to a 1100 * request_sense struct. If execution of the command results in an error with a 1101 * CHECK CONDITION status, this structure will be filled with the results of the 1102 * subsequent request sense command. The pointer can also be NULL, in which case 1103 * no sense information is returned. 1104 */ 1105static void msf_from_bcd(struct atapi_msf *msf) 1106{ 1107 msf->minute = bcd2bin(msf->minute); 1108 msf->second = bcd2bin(msf->second); 1109 msf->frame = bcd2bin(msf->frame); 1110} 1111 1112int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1113{ 1114 struct cdrom_info *info = drive->driver_data; 1115 struct cdrom_device_info *cdi = &info->devinfo; 1116 unsigned char cmd[BLK_MAX_CDB]; 1117 1118 ide_debug_log(IDE_DBG_FUNC, "enter"); 1119 1120 memset(cmd, 0, BLK_MAX_CDB); 1121 cmd[0] = GPCMD_TEST_UNIT_READY; 1122 1123 /* 1124 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1125 * instead of supporting the LOAD_UNLOAD opcode. 1126 */ 1127 cmd[7] = cdi->sanyo_slot % 3; 1128 1129 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1130} 1131 1132static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1133 unsigned long *sectors_per_frame, 1134 struct request_sense *sense) 1135{ 1136 struct { 1137 __be32 lba; 1138 __be32 blocklen; 1139 } capbuf; 1140 1141 int stat; 1142 unsigned char cmd[BLK_MAX_CDB]; 1143 unsigned len = sizeof(capbuf); 1144 u32 blocklen; 1145 1146 ide_debug_log(IDE_DBG_FUNC, "enter"); 1147 1148 memset(cmd, 0, BLK_MAX_CDB); 1149 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1150 1151 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1152 REQ_QUIET); 1153 if (stat) 1154 return stat; 1155 1156 /* 1157 * Sanity check the given block size 1158 */ 1159 blocklen = be32_to_cpu(capbuf.blocklen); 1160 switch (blocklen) { 1161 case 512: 1162 case 1024: 1163 case 2048: 1164 case 4096: 1165 break; 1166 default: 1167 printk(KERN_ERR PFX "%s: weird block size %u\n", 1168 drive->name, blocklen); 1169 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1170 drive->name); 1171 blocklen = 2048; 1172 break; 1173 } 1174 1175 *capacity = 1 + be32_to_cpu(capbuf.lba); 1176 *sectors_per_frame = blocklen >> SECTOR_BITS; 1177 1178 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1179 *capacity, *sectors_per_frame); 1180 1181 return 0; 1182} 1183 1184static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1185 int format, char *buf, int buflen, 1186 struct request_sense *sense) 1187{ 1188 unsigned char cmd[BLK_MAX_CDB]; 1189 1190 ide_debug_log(IDE_DBG_FUNC, "enter"); 1191 1192 memset(cmd, 0, BLK_MAX_CDB); 1193 1194 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1195 cmd[6] = trackno; 1196 cmd[7] = (buflen >> 8); 1197 cmd[8] = (buflen & 0xff); 1198 cmd[9] = (format << 6); 1199 1200 if (msf_flag) 1201 cmd[1] = 2; 1202 1203 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1204} 1205 1206/* Try to read the entire TOC for the disk into our internal buffer. */ 1207int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1208{ 1209 int stat, ntracks, i; 1210 struct cdrom_info *info = drive->driver_data; 1211 struct cdrom_device_info *cdi = &info->devinfo; 1212 struct atapi_toc *toc = info->toc; 1213 struct { 1214 struct atapi_toc_header hdr; 1215 struct atapi_toc_entry ent; 1216 } ms_tmp; 1217 long last_written; 1218 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1219 1220 ide_debug_log(IDE_DBG_FUNC, "enter"); 1221 1222 if (toc == NULL) { 1223 /* try to allocate space */ 1224 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1225 if (toc == NULL) { 1226 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1227 drive->name); 1228 return -ENOMEM; 1229 } 1230 info->toc = toc; 1231 } 1232 1233 /* 1234 * Check to see if the existing data is still valid. If it is, 1235 * just return. 1236 */ 1237 (void) cdrom_check_status(drive, sense); 1238 1239 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1240 return 0; 1241 1242 /* try to get the total cdrom capacity and sector size */ 1243 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1244 sense); 1245 if (stat) 1246 toc->capacity = 0x1fffff; 1247 1248 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1249 /* save a private copy of the TOC capacity for error handling */ 1250 drive->probed_capacity = toc->capacity * sectors_per_frame; 1251 1252 blk_queue_hardsect_size(drive->queue, 1253 sectors_per_frame << SECTOR_BITS); 1254 1255 /* first read just the header, so we know how long the TOC is */ 1256 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1257 sizeof(struct atapi_toc_header), sense); 1258 if (stat) 1259 return stat; 1260 1261 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1262 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1263 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1264 } 1265 1266 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1267 if (ntracks <= 0) 1268 return -EIO; 1269 if (ntracks > MAX_TRACKS) 1270 ntracks = MAX_TRACKS; 1271 1272 /* now read the whole schmeer */ 1273 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1274 (char *)&toc->hdr, 1275 sizeof(struct atapi_toc_header) + 1276 (ntracks + 1) * 1277 sizeof(struct atapi_toc_entry), sense); 1278 1279 if (stat && toc->hdr.first_track > 1) { 1280 /* 1281 * Cds with CDI tracks only don't have any TOC entries, despite 1282 * of this the returned values are 1283 * first_track == last_track = number of CDI tracks + 1, 1284 * so that this case is indistinguishable from the same layout 1285 * plus an additional audio track. If we get an error for the 1286 * regular case, we assume a CDI without additional audio 1287 * tracks. In this case the readable TOC is empty (CDI tracks 1288 * are not included) and only holds the Leadout entry. 1289 * 1290 * Heiko Eißfeldt. 1291 */ 1292 ntracks = 0; 1293 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1294 (char *)&toc->hdr, 1295 sizeof(struct atapi_toc_header) + 1296 (ntracks + 1) * 1297 sizeof(struct atapi_toc_entry), 1298 sense); 1299 if (stat) 1300 return stat; 1301 1302 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1303 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1304 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1305 } else { 1306 toc->hdr.first_track = CDROM_LEADOUT; 1307 toc->hdr.last_track = CDROM_LEADOUT; 1308 } 1309 } 1310 1311 if (stat) 1312 return stat; 1313 1314 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1315 1316 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1317 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1318 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1319 } 1320 1321 for (i = 0; i <= ntracks; i++) { 1322 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1323 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1324 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1325 msf_from_bcd(&toc->ent[i].addr.msf); 1326 } 1327 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1328 toc->ent[i].addr.msf.second, 1329 toc->ent[i].addr.msf.frame); 1330 } 1331 1332 if (toc->hdr.first_track != CDROM_LEADOUT) { 1333 /* read the multisession information */ 1334 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1335 sizeof(ms_tmp), sense); 1336 if (stat) 1337 return stat; 1338 1339 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1340 } else { 1341 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1342 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1343 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1344 } 1345 1346 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1347 /* re-read multisession information using MSF format */ 1348 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1349 sizeof(ms_tmp), sense); 1350 if (stat) 1351 return stat; 1352 1353 msf_from_bcd(&ms_tmp.ent.addr.msf); 1354 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1355 ms_tmp.ent.addr.msf.second, 1356 ms_tmp.ent.addr.msf.frame); 1357 } 1358 1359 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1360 1361 /* now try to get the total cdrom capacity */ 1362 stat = cdrom_get_last_written(cdi, &last_written); 1363 if (!stat && (last_written > toc->capacity)) { 1364 toc->capacity = last_written; 1365 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1366 drive->probed_capacity = toc->capacity * sectors_per_frame; 1367 } 1368 1369 /* Remember that we've read this stuff. */ 1370 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1371 1372 return 0; 1373} 1374 1375int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1376{ 1377 struct cdrom_info *info = drive->driver_data; 1378 struct cdrom_device_info *cdi = &info->devinfo; 1379 struct packet_command cgc; 1380 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1381 1382 ide_debug_log(IDE_DBG_FUNC, "enter"); 1383 1384 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1385 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1386 1387 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1388 do { 1389 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1390 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1391 if (!stat) 1392 break; 1393 } while (--attempts); 1394 return stat; 1395} 1396 1397void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1398{ 1399 struct cdrom_info *cd = drive->driver_data; 1400 u16 curspeed, maxspeed; 1401 1402 ide_debug_log(IDE_DBG_FUNC, "enter"); 1403 1404 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1405 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1406 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1407 } else { 1408 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1409 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1410 } 1411 1412 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1413 curspeed, maxspeed); 1414 1415 cd->current_speed = (curspeed + (176/2)) / 176; 1416 cd->max_speed = (maxspeed + (176/2)) / 176; 1417} 1418 1419#define IDE_CD_CAPABILITIES \ 1420 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1421 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1422 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1423 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1424 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1425 1426static struct cdrom_device_ops ide_cdrom_dops = { 1427 .open = ide_cdrom_open_real, 1428 .release = ide_cdrom_release_real, 1429 .drive_status = ide_cdrom_drive_status, 1430 .media_changed = ide_cdrom_check_media_change_real, 1431 .tray_move = ide_cdrom_tray_move, 1432 .lock_door = ide_cdrom_lock_door, 1433 .select_speed = ide_cdrom_select_speed, 1434 .get_last_session = ide_cdrom_get_last_session, 1435 .get_mcn = ide_cdrom_get_mcn, 1436 .reset = ide_cdrom_reset, 1437 .audio_ioctl = ide_cdrom_audio_ioctl, 1438 .capability = IDE_CD_CAPABILITIES, 1439 .generic_packet = ide_cdrom_packet, 1440}; 1441 1442static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1443{ 1444 struct cdrom_info *info = drive->driver_data; 1445 struct cdrom_device_info *devinfo = &info->devinfo; 1446 1447 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1448 1449 devinfo->ops = &ide_cdrom_dops; 1450 devinfo->speed = info->current_speed; 1451 devinfo->capacity = nslots; 1452 devinfo->handle = drive; 1453 strcpy(devinfo->name, drive->name); 1454 1455 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1456 devinfo->mask |= CDC_SELECT_SPEED; 1457 1458 devinfo->disk = info->disk; 1459 return register_cdrom(devinfo); 1460} 1461 1462static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1463{ 1464 struct cdrom_info *cd = drive->driver_data; 1465 struct cdrom_device_info *cdi = &cd->devinfo; 1466 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1467 mechtype_t mechtype; 1468 int nslots = 1; 1469 1470 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1471 drive->media, drive->atapi_flags); 1472 1473 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1474 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1475 CDC_MO_DRIVE | CDC_RAM); 1476 1477 if (drive->media == ide_optical) { 1478 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1479 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1480 drive->name); 1481 return nslots; 1482 } 1483 1484 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1485 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1486 cdi->mask &= ~CDC_PLAY_AUDIO; 1487 return nslots; 1488 } 1489 1490 /* 1491 * We have to cheat a little here. the packet will eventually be queued 1492 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1493 * Since this device hasn't been registered with the Uniform layer yet, 1494 * it can't do this. Same goes for cdi->ops. 1495 */ 1496 cdi->handle = drive; 1497 cdi->ops = &ide_cdrom_dops; 1498 1499 if (ide_cdrom_get_capabilities(drive, buf)) 1500 return 0; 1501 1502 if ((buf[8 + 6] & 0x01) == 0) 1503 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1504 if (buf[8 + 6] & 0x08) 1505 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1506 if (buf[8 + 3] & 0x01) 1507 cdi->mask &= ~CDC_CD_R; 1508 if (buf[8 + 3] & 0x02) 1509 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1510 if (buf[8 + 2] & 0x38) 1511 cdi->mask &= ~CDC_DVD; 1512 if (buf[8 + 3] & 0x20) 1513 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1514 if (buf[8 + 3] & 0x10) 1515 cdi->mask &= ~CDC_DVD_R; 1516 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1517 cdi->mask &= ~CDC_PLAY_AUDIO; 1518 1519 mechtype = buf[8 + 6] >> 5; 1520 if (mechtype == mechtype_caddy || 1521 mechtype == mechtype_popup || 1522 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1523 cdi->mask |= CDC_CLOSE_TRAY; 1524 1525 if (cdi->sanyo_slot > 0) { 1526 cdi->mask &= ~CDC_SELECT_DISC; 1527 nslots = 3; 1528 } else if (mechtype == mechtype_individual_changer || 1529 mechtype == mechtype_cartridge_changer) { 1530 nslots = cdrom_number_of_slots(cdi); 1531 if (nslots > 1) 1532 cdi->mask &= ~CDC_SELECT_DISC; 1533 } 1534 1535 ide_cdrom_update_speed(drive, buf); 1536 1537 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1538 1539 /* don't print speed if the drive reported 0 */ 1540 if (cd->max_speed) 1541 printk(KERN_CONT " %dX", cd->max_speed); 1542 1543 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1544 1545 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1546 printk(KERN_CONT " DVD%s%s", 1547 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1548 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1549 1550 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1551 printk(KERN_CONT " CD%s%s", 1552 (cdi->mask & CDC_CD_R) ? "" : "-R", 1553 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1554 1555 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1556 printk(KERN_CONT " changer w/%d slots", nslots); 1557 else 1558 printk(KERN_CONT " drive"); 1559 1560 printk(KERN_CONT ", %dkB Cache\n", 1561 be16_to_cpup((__be16 *)&buf[8 + 12])); 1562 1563 return nslots; 1564} 1565 1566/* standard prep_rq_fn that builds 10 byte cmds */ 1567static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1568{ 1569 int hard_sect = queue_hardsect_size(q); 1570 long block = (long)rq->hard_sector / (hard_sect >> 9); 1571 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1572 1573 memset(rq->cmd, 0, BLK_MAX_CDB); 1574 1575 if (rq_data_dir(rq) == READ) 1576 rq->cmd[0] = GPCMD_READ_10; 1577 else 1578 rq->cmd[0] = GPCMD_WRITE_10; 1579 1580 /* 1581 * fill in lba 1582 */ 1583 rq->cmd[2] = (block >> 24) & 0xff; 1584 rq->cmd[3] = (block >> 16) & 0xff; 1585 rq->cmd[4] = (block >> 8) & 0xff; 1586 rq->cmd[5] = block & 0xff; 1587 1588 /* 1589 * and transfer length 1590 */ 1591 rq->cmd[7] = (blocks >> 8) & 0xff; 1592 rq->cmd[8] = blocks & 0xff; 1593 rq->cmd_len = 10; 1594 return BLKPREP_OK; 1595} 1596 1597/* 1598 * Most of the SCSI commands are supported directly by ATAPI devices. 1599 * This transform handles the few exceptions. 1600 */ 1601static int ide_cdrom_prep_pc(struct request *rq) 1602{ 1603 u8 *c = rq->cmd; 1604 1605 /* transform 6-byte read/write commands to the 10-byte version */ 1606 if (c[0] == READ_6 || c[0] == WRITE_6) { 1607 c[8] = c[4]; 1608 c[5] = c[3]; 1609 c[4] = c[2]; 1610 c[3] = c[1] & 0x1f; 1611 c[2] = 0; 1612 c[1] &= 0xe0; 1613 c[0] += (READ_10 - READ_6); 1614 rq->cmd_len = 10; 1615 return BLKPREP_OK; 1616 } 1617 1618 /* 1619 * it's silly to pretend we understand 6-byte sense commands, just 1620 * reject with ILLEGAL_REQUEST and the caller should take the 1621 * appropriate action 1622 */ 1623 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1624 rq->errors = ILLEGAL_REQUEST; 1625 return BLKPREP_KILL; 1626 } 1627 1628 return BLKPREP_OK; 1629} 1630 1631static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1632{ 1633 if (blk_fs_request(rq)) 1634 return ide_cdrom_prep_fs(q, rq); 1635 else if (blk_pc_request(rq)) 1636 return ide_cdrom_prep_pc(rq); 1637 1638 return 0; 1639} 1640 1641struct cd_list_entry { 1642 const char *id_model; 1643 const char *id_firmware; 1644 unsigned int cd_flags; 1645}; 1646 1647#ifdef CONFIG_IDE_PROC_FS 1648static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1649{ 1650 unsigned long capacity, sectors_per_frame; 1651 1652 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1653 return 0; 1654 1655 return capacity * sectors_per_frame; 1656} 1657 1658static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1659 int count, int *eof, void *data) 1660{ 1661 ide_drive_t *drive = data; 1662 int len; 1663 1664 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1665 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1666} 1667 1668static ide_proc_entry_t idecd_proc[] = { 1669 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1670 { NULL, 0, NULL, NULL } 1671}; 1672 1673static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1674{ 1675 return idecd_proc; 1676} 1677 1678static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1679{ 1680 return NULL; 1681} 1682#endif 1683 1684static const struct cd_list_entry ide_cd_quirks_list[] = { 1685 /* Limit transfer size per interrupt. */ 1686 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1687 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1688 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1689 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1690 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1691 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1692 IDE_AFLAG_PRE_ATAPI12, }, 1693 /* Vertos 300, some versions of this drive like to talk BCD. */ 1694 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1695 /* Vertos 600 ESD. */ 1696 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1697 /* 1698 * Sanyo 3 CD changer uses a non-standard command for CD changing 1699 * (by default standard ATAPI support for CD changers is used). 1700 */ 1701 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1702 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1703 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1704 /* Stingray 8X CD-ROM. */ 1705 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1706 /* 1707 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1708 * mode sense page capabilities size, but older drives break. 1709 */ 1710 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1711 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1712 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1713 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1714 /* 1715 * Some drives used by Apple don't advertise audio play 1716 * but they do support reading TOC & audio datas. 1717 */ 1718 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1719 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1720 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1721 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1722 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1723 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1724 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1725 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1726 { NULL, NULL, 0 } 1727}; 1728 1729static unsigned int ide_cd_flags(u16 *id) 1730{ 1731 const struct cd_list_entry *cle = ide_cd_quirks_list; 1732 1733 while (cle->id_model) { 1734 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1735 (cle->id_firmware == NULL || 1736 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1737 return cle->cd_flags; 1738 cle++; 1739 } 1740 1741 return 0; 1742} 1743 1744static int ide_cdrom_setup(ide_drive_t *drive) 1745{ 1746 struct cdrom_info *cd = drive->driver_data; 1747 struct cdrom_device_info *cdi = &cd->devinfo; 1748 u16 *id = drive->id; 1749 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1750 int nslots; 1751 1752 ide_debug_log(IDE_DBG_PROBE, "enter"); 1753 1754 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1755 blk_queue_dma_alignment(drive->queue, 31); 1756 blk_queue_update_dma_pad(drive->queue, 15); 1757 drive->queue->unplug_delay = (1 * HZ) / 1000; 1758 if (!drive->queue->unplug_delay) 1759 drive->queue->unplug_delay = 1; 1760 1761 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1762 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1763 1764 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1765 fw_rev[4] == '1' && fw_rev[6] <= '2') 1766 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1767 IDE_AFLAG_TOCADDR_AS_BCD); 1768 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1769 fw_rev[4] == '1' && fw_rev[6] <= '2') 1770 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1771 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1772 /* 3 => use CD in slot 0 */ 1773 cdi->sanyo_slot = 3; 1774 1775 nslots = ide_cdrom_probe_capabilities(drive); 1776 1777 /* set correct block size */ 1778 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1779 1780 if (ide_cdrom_register(drive, nslots)) { 1781 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1782 " cdrom driver.\n", drive->name, __func__); 1783 cd->devinfo.handle = NULL; 1784 return 1; 1785 } 1786 1787 ide_proc_register_driver(drive, cd->driver); 1788 return 0; 1789} 1790 1791static void ide_cd_remove(ide_drive_t *drive) 1792{ 1793 struct cdrom_info *info = drive->driver_data; 1794 1795 ide_debug_log(IDE_DBG_FUNC, "enter"); 1796 1797 ide_proc_unregister_driver(drive, info->driver); 1798 device_del(&info->dev); 1799 del_gendisk(info->disk); 1800 1801 mutex_lock(&idecd_ref_mutex); 1802 put_device(&info->dev); 1803 mutex_unlock(&idecd_ref_mutex); 1804} 1805 1806static void ide_cd_release(struct device *dev) 1807{ 1808 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1809 struct cdrom_device_info *devinfo = &info->devinfo; 1810 ide_drive_t *drive = info->drive; 1811 struct gendisk *g = info->disk; 1812 1813 ide_debug_log(IDE_DBG_FUNC, "enter"); 1814 1815 kfree(info->toc); 1816 if (devinfo->handle == drive) 1817 unregister_cdrom(devinfo); 1818 drive->driver_data = NULL; 1819 blk_queue_prep_rq(drive->queue, NULL); 1820 g->private_data = NULL; 1821 put_disk(g); 1822 kfree(info); 1823} 1824 1825static int ide_cd_probe(ide_drive_t *); 1826 1827static struct ide_driver ide_cdrom_driver = { 1828 .gen_driver = { 1829 .owner = THIS_MODULE, 1830 .name = "ide-cdrom", 1831 .bus = &ide_bus_type, 1832 }, 1833 .probe = ide_cd_probe, 1834 .remove = ide_cd_remove, 1835 .version = IDECD_VERSION, 1836 .do_request = ide_cd_do_request, 1837#ifdef CONFIG_IDE_PROC_FS 1838 .proc_entries = ide_cd_proc_entries, 1839 .proc_devsets = ide_cd_proc_devsets, 1840#endif 1841}; 1842 1843static int idecd_open(struct block_device *bdev, fmode_t mode) 1844{ 1845 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1846 int rc = -ENOMEM; 1847 1848 if (!info) 1849 return -ENXIO; 1850 1851 rc = cdrom_open(&info->devinfo, bdev, mode); 1852 1853 if (rc < 0) 1854 ide_cd_put(info); 1855 1856 return rc; 1857} 1858 1859static int idecd_release(struct gendisk *disk, fmode_t mode) 1860{ 1861 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1862 1863 cdrom_release(&info->devinfo, mode); 1864 1865 ide_cd_put(info); 1866 1867 return 0; 1868} 1869 1870static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1871{ 1872 struct packet_command cgc; 1873 char buffer[16]; 1874 int stat; 1875 char spindown; 1876 1877 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1878 return -EFAULT; 1879 1880 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1881 1882 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1883 if (stat) 1884 return stat; 1885 1886 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1887 return cdrom_mode_select(cdi, &cgc); 1888} 1889 1890static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1891{ 1892 struct packet_command cgc; 1893 char buffer[16]; 1894 int stat; 1895 char spindown; 1896 1897 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1898 1899 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1900 if (stat) 1901 return stat; 1902 1903 spindown = buffer[11] & 0x0f; 1904 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1905 return -EFAULT; 1906 return 0; 1907} 1908 1909static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1910 unsigned int cmd, unsigned long arg) 1911{ 1912 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1913 int err; 1914 1915 switch (cmd) { 1916 case CDROMSETSPINDOWN: 1917 return idecd_set_spindown(&info->devinfo, arg); 1918 case CDROMGETSPINDOWN: 1919 return idecd_get_spindown(&info->devinfo, arg); 1920 default: 1921 break; 1922 } 1923 1924 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1925 if (err == -EINVAL) 1926 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1927 1928 return err; 1929} 1930 1931static int idecd_media_changed(struct gendisk *disk) 1932{ 1933 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1934 return cdrom_media_changed(&info->devinfo); 1935} 1936 1937static int idecd_revalidate_disk(struct gendisk *disk) 1938{ 1939 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1940 struct request_sense sense; 1941 1942 ide_cd_read_toc(info->drive, &sense); 1943 1944 return 0; 1945} 1946 1947static struct block_device_operations idecd_ops = { 1948 .owner = THIS_MODULE, 1949 .open = idecd_open, 1950 .release = idecd_release, 1951 .locked_ioctl = idecd_ioctl, 1952 .media_changed = idecd_media_changed, 1953 .revalidate_disk = idecd_revalidate_disk 1954}; 1955 1956/* module options */ 1957static unsigned long debug_mask; 1958module_param(debug_mask, ulong, 0644); 1959 1960MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1961 1962static int ide_cd_probe(ide_drive_t *drive) 1963{ 1964 struct cdrom_info *info; 1965 struct gendisk *g; 1966 struct request_sense sense; 1967 1968 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1969 drive->driver_req, drive->media); 1970 1971 if (!strstr("ide-cdrom", drive->driver_req)) 1972 goto failed; 1973 1974 if (drive->media != ide_cdrom && drive->media != ide_optical) 1975 goto failed; 1976 1977 drive->debug_mask = debug_mask; 1978 drive->irq_handler = cdrom_newpc_intr; 1979 1980 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1981 if (info == NULL) { 1982 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1983 drive->name); 1984 goto failed; 1985 } 1986 1987 g = alloc_disk(1 << PARTN_BITS); 1988 if (!g) 1989 goto out_free_cd; 1990 1991 ide_init_disk(g, drive); 1992 1993 info->dev.parent = &drive->gendev; 1994 info->dev.release = ide_cd_release; 1995 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1996 1997 if (device_register(&info->dev)) 1998 goto out_free_disk; 1999 2000 info->drive = drive; 2001 info->driver = &ide_cdrom_driver; 2002 info->disk = g; 2003 2004 g->private_data = &info->driver; 2005 2006 drive->driver_data = info; 2007 2008 g->minors = 1; 2009 g->driverfs_dev = &drive->gendev; 2010 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2011 if (ide_cdrom_setup(drive)) { 2012 put_device(&info->dev); 2013 goto failed; 2014 } 2015 2016 ide_cd_read_toc(drive, &sense); 2017 g->fops = &idecd_ops; 2018 g->flags |= GENHD_FL_REMOVABLE; 2019 add_disk(g); 2020 return 0; 2021 2022out_free_disk: 2023 put_disk(g); 2024out_free_cd: 2025 kfree(info); 2026failed: 2027 return -ENODEV; 2028} 2029 2030static void __exit ide_cdrom_exit(void) 2031{ 2032 driver_unregister(&ide_cdrom_driver.gen_driver); 2033} 2034 2035static int __init ide_cdrom_init(void) 2036{ 2037 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2038 return driver_register(&ide_cdrom_driver.gen_driver); 2039} 2040 2041MODULE_ALIAS("ide:*m-cdrom*"); 2042MODULE_ALIAS("ide-cd"); 2043module_init(ide_cdrom_init); 2044module_exit(ide_cdrom_exit); 2045MODULE_LICENSE("GPL"); 2046