ide-cd.c revision 392de1d53dd40e2eebee3a0a26aa647a3865ca78
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 * For those wishing to work on this driver, please be sure you download 16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI 17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by 18 * anonymous ftp from: 19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps 20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf 21 * 22 * For historical changelog please see: 23 * Documentation/ide/ChangeLog.ide-cd.1994-2004 24 */ 25 26#define DRV_NAME "ide-cd" 27#define PFX DRV_NAME ": " 28 29#define IDECD_VERSION "5.00" 30 31#include <linux/module.h> 32#include <linux/types.h> 33#include <linux/kernel.h> 34#include <linux/delay.h> 35#include <linux/timer.h> 36#include <linux/slab.h> 37#include <linux/interrupt.h> 38#include <linux/errno.h> 39#include <linux/cdrom.h> 40#include <linux/ide.h> 41#include <linux/completion.h> 42#include <linux/mutex.h> 43#include <linux/bcd.h> 44 45/* For SCSI -> ATAPI command conversion */ 46#include <scsi/scsi.h> 47 48#include <linux/irq.h> 49#include <linux/io.h> 50#include <asm/byteorder.h> 51#include <linux/uaccess.h> 52#include <asm/unaligned.h> 53 54#include "ide-cd.h" 55 56static DEFINE_MUTEX(idecd_ref_mutex); 57 58static void ide_cd_release(struct kref *); 59 60static struct cdrom_info *ide_cd_get(struct gendisk *disk) 61{ 62 struct cdrom_info *cd = NULL; 63 64 mutex_lock(&idecd_ref_mutex); 65 cd = ide_drv_g(disk, cdrom_info); 66 if (cd) { 67 if (ide_device_get(cd->drive)) 68 cd = NULL; 69 else 70 kref_get(&cd->kref); 71 72 } 73 mutex_unlock(&idecd_ref_mutex); 74 return cd; 75} 76 77static void ide_cd_put(struct cdrom_info *cd) 78{ 79 ide_drive_t *drive = cd->drive; 80 81 mutex_lock(&idecd_ref_mutex); 82 kref_put(&cd->kref, ide_cd_release); 83 ide_device_put(drive); 84 mutex_unlock(&idecd_ref_mutex); 85} 86 87/* 88 * Generic packet command support and error handling routines. 89 */ 90 91/* Mark that we've seen a media change and invalidate our internal buffers. */ 92static void cdrom_saw_media_change(ide_drive_t *drive) 93{ 94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 96} 97 98static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 99 struct request_sense *sense) 100{ 101 int log = 0; 102 103 ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__, 104 sense->sense_key); 105 106 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 107 return 0; 108 109 switch (sense->sense_key) { 110 case NO_SENSE: 111 case RECOVERED_ERROR: 112 break; 113 case NOT_READY: 114 /* 115 * don't care about tray state messages for e.g. capacity 116 * commands or in-progress or becoming ready 117 */ 118 if (sense->asc == 0x3a || sense->asc == 0x04) 119 break; 120 log = 1; 121 break; 122 case ILLEGAL_REQUEST: 123 /* 124 * don't log START_STOP unit with LoEj set, since we cannot 125 * reliably check if drive can auto-close 126 */ 127 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 128 break; 129 log = 1; 130 break; 131 case UNIT_ATTENTION: 132 /* 133 * Make good and sure we've seen this potential media change. 134 * Some drives (i.e. Creative) fail to present the correct sense 135 * key in the error register. 136 */ 137 cdrom_saw_media_change(drive); 138 break; 139 default: 140 log = 1; 141 break; 142 } 143 return log; 144} 145 146static void cdrom_analyze_sense_data(ide_drive_t *drive, 147 struct request *failed_command, 148 struct request_sense *sense) 149{ 150 unsigned long sector; 151 unsigned long bio_sectors; 152 struct cdrom_info *info = drive->driver_data; 153 154 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, " 155 "sense_key: 0x%x\n", __func__, sense->error_code, 156 sense->sense_key); 157 158 if (failed_command) 159 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n", 160 __func__, failed_command->cmd[0]); 161 162 if (!cdrom_log_sense(drive, failed_command, sense)) 163 return; 164 165 /* 166 * If a read toc is executed for a CD-R or CD-RW medium where the first 167 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 168 * confusing error) 169 */ 170 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 171 if (sense->sense_key == 0x05 && sense->asc == 0x24) 172 return; 173 174 /* current error */ 175 if (sense->error_code == 0x70) { 176 switch (sense->sense_key) { 177 case MEDIUM_ERROR: 178 case VOLUME_OVERFLOW: 179 case ILLEGAL_REQUEST: 180 if (!sense->valid) 181 break; 182 if (failed_command == NULL || 183 !blk_fs_request(failed_command)) 184 break; 185 sector = (sense->information[0] << 24) | 186 (sense->information[1] << 16) | 187 (sense->information[2] << 8) | 188 (sense->information[3]); 189 190 if (drive->queue->hardsect_size == 2048) 191 /* device sector size is 2K */ 192 sector <<= 2; 193 194 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 195 sector &= ~(bio_sectors - 1); 196 197 if (sector < get_capacity(info->disk) && 198 drive->probed_capacity - sector < 4 * 75) 199 set_capacity(info->disk, sector); 200 } 201 } 202 203 ide_cd_log_error(drive->name, failed_command, sense); 204} 205 206static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 207 struct request *failed_command) 208{ 209 struct cdrom_info *info = drive->driver_data; 210 struct request *rq = &info->request_sense_request; 211 212 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__); 213 214 if (sense == NULL) 215 sense = &info->sense_data; 216 217 /* stuff the sense request in front of our current request */ 218 blk_rq_init(NULL, rq); 219 rq->cmd_type = REQ_TYPE_ATA_PC; 220 rq->rq_disk = info->disk; 221 222 rq->data = sense; 223 rq->cmd[0] = GPCMD_REQUEST_SENSE; 224 rq->cmd[4] = 18; 225 rq->data_len = 18; 226 227 rq->cmd_type = REQ_TYPE_SENSE; 228 rq->cmd_flags |= REQ_PREEMPT; 229 230 /* NOTE! Save the failed command in "rq->buffer" */ 231 rq->buffer = (void *) failed_command; 232 233 if (failed_command) 234 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n", 235 failed_command->cmd[0]); 236 237 ide_do_drive_cmd(drive, rq); 238} 239 240static void cdrom_end_request(ide_drive_t *drive, int uptodate) 241{ 242 struct request *rq = HWGROUP(drive)->rq; 243 int nsectors = rq->hard_cur_sectors; 244 245 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, " 246 "nsectors: %d\n", __func__, rq->cmd[0], uptodate, 247 nsectors); 248 249 if (blk_sense_request(rq) && uptodate) { 250 /* 251 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 252 * failed request 253 */ 254 struct request *failed = (struct request *) rq->buffer; 255 struct cdrom_info *info = drive->driver_data; 256 void *sense = &info->sense_data; 257 258 if (failed) { 259 if (failed->sense) { 260 sense = failed->sense; 261 failed->sense_len = rq->sense_len; 262 } 263 cdrom_analyze_sense_data(drive, failed, sense); 264 /* 265 * now end the failed request 266 */ 267 if (blk_fs_request(failed)) { 268 if (ide_end_dequeued_request(drive, failed, 0, 269 failed->hard_nr_sectors)) 270 BUG(); 271 } else { 272 if (blk_end_request(failed, -EIO, 273 failed->data_len)) 274 BUG(); 275 } 276 } else 277 cdrom_analyze_sense_data(drive, NULL, sense); 278 } 279 280 if (!rq->current_nr_sectors && blk_fs_request(rq)) 281 uptodate = 1; 282 /* make sure it's fully ended */ 283 if (blk_pc_request(rq)) 284 nsectors = (rq->data_len + 511) >> 9; 285 if (!nsectors) 286 nsectors = 1; 287 288 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n", 289 __func__, uptodate, nsectors); 290 291 ide_end_request(drive, uptodate, nsectors); 292} 293 294static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 295{ 296 if (st & 0x80) 297 return; 298 ide_dump_status(drive, msg, st); 299} 300 301/* 302 * Returns: 303 * 0: if the request should be continued. 304 * 1: if the request was ended. 305 */ 306static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 307{ 308 ide_hwif_t *hwif = drive->hwif; 309 ide_hwgroup_t *hwgroup = hwif->hwgroup; 310 struct request *rq = hwgroup->rq; 311 int stat, err, sense_key; 312 313 /* check for errors */ 314 stat = hwif->tp_ops->read_status(hwif); 315 316 if (stat_ret) 317 *stat_ret = stat; 318 319 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 320 return 0; 321 322 /* get the IDE error register */ 323 err = ide_read_error(drive); 324 sense_key = err >> 4; 325 326 if (rq == NULL) { 327 printk(KERN_ERR PFX "%s: missing rq in %s\n", 328 drive->name, __func__); 329 return 1; 330 } 331 332 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, " 333 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n", 334 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err); 335 336 if (blk_sense_request(rq)) { 337 /* 338 * We got an error trying to get sense info from the drive 339 * (probably while trying to recover from a former error). 340 * Just give up. 341 */ 342 rq->cmd_flags |= REQ_FAILED; 343 cdrom_end_request(drive, 0); 344 ide_error(drive, "request sense failure", stat); 345 return 1; 346 347 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 348 /* All other functions, except for READ. */ 349 350 /* 351 * if we have an error, pass back CHECK_CONDITION as the 352 * scsi status byte 353 */ 354 if (blk_pc_request(rq) && !rq->errors) 355 rq->errors = SAM_STAT_CHECK_CONDITION; 356 357 /* check for tray open */ 358 if (sense_key == NOT_READY) { 359 cdrom_saw_media_change(drive); 360 } else if (sense_key == UNIT_ATTENTION) { 361 /* check for media change */ 362 cdrom_saw_media_change(drive); 363 return 0; 364 } else if (sense_key == ILLEGAL_REQUEST && 365 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 366 /* 367 * Don't print error message for this condition-- 368 * SFF8090i indicates that 5/24/00 is the correct 369 * response to a request to close the tray if the 370 * drive doesn't have that capability. 371 * cdrom_log_sense() knows this! 372 */ 373 } else if (!(rq->cmd_flags & REQ_QUIET)) { 374 /* otherwise, print an error */ 375 ide_dump_status(drive, "packet command error", stat); 376 } 377 378 rq->cmd_flags |= REQ_FAILED; 379 380 /* 381 * instead of playing games with moving completions around, 382 * remove failed request completely and end it when the 383 * request sense has completed 384 */ 385 goto end_request; 386 387 } else if (blk_fs_request(rq)) { 388 int do_end_request = 0; 389 390 /* handle errors from READ and WRITE requests */ 391 392 if (blk_noretry_request(rq)) 393 do_end_request = 1; 394 395 if (sense_key == NOT_READY) { 396 /* tray open */ 397 if (rq_data_dir(rq) == READ) { 398 cdrom_saw_media_change(drive); 399 400 /* fail the request */ 401 printk(KERN_ERR PFX "%s: tray open\n", 402 drive->name); 403 do_end_request = 1; 404 } else { 405 struct cdrom_info *info = drive->driver_data; 406 407 /* 408 * Allow the drive 5 seconds to recover, some 409 * devices will return this error while flushing 410 * data from cache. 411 */ 412 if (!rq->errors) 413 info->write_timeout = jiffies + 414 ATAPI_WAIT_WRITE_BUSY; 415 rq->errors = 1; 416 if (time_after(jiffies, info->write_timeout)) 417 do_end_request = 1; 418 else { 419 struct request_queue *q = drive->queue; 420 unsigned long flags; 421 422 /* 423 * take a breather relying on the unplug 424 * timer to kick us again 425 */ 426 spin_lock_irqsave(q->queue_lock, flags); 427 blk_plug_device(q); 428 spin_unlock_irqrestore(q->queue_lock, flags); 429 430 return 1; 431 } 432 } 433 } else if (sense_key == UNIT_ATTENTION) { 434 /* media change */ 435 cdrom_saw_media_change(drive); 436 437 /* 438 * Arrange to retry the request but be sure to give up 439 * if we've retried too many times. 440 */ 441 if (++rq->errors > ERROR_MAX) 442 do_end_request = 1; 443 } else if (sense_key == ILLEGAL_REQUEST || 444 sense_key == DATA_PROTECT) { 445 /* 446 * No point in retrying after an illegal request or data 447 * protect error. 448 */ 449 ide_dump_status_no_sense(drive, "command error", stat); 450 do_end_request = 1; 451 } else if (sense_key == MEDIUM_ERROR) { 452 /* 453 * No point in re-trying a zillion times on a bad 454 * sector. If we got here the error is not correctable. 455 */ 456 ide_dump_status_no_sense(drive, 457 "media error (bad sector)", 458 stat); 459 do_end_request = 1; 460 } else if (sense_key == BLANK_CHECK) { 461 /* disk appears blank ?? */ 462 ide_dump_status_no_sense(drive, "media error (blank)", 463 stat); 464 do_end_request = 1; 465 } else if ((err & ~ATA_ABORTED) != 0) { 466 /* go to the default handler for other errors */ 467 ide_error(drive, "cdrom_decode_status", stat); 468 return 1; 469 } else if ((++rq->errors > ERROR_MAX)) { 470 /* we've racked up too many retries, abort */ 471 do_end_request = 1; 472 } 473 474 /* 475 * End a request through request sense analysis when we have 476 * sense data. We need this in order to perform end of media 477 * processing. 478 */ 479 if (do_end_request) 480 goto end_request; 481 482 /* 483 * If we got a CHECK_CONDITION status, queue 484 * a request sense command. 485 */ 486 if (stat & ATA_ERR) 487 cdrom_queue_request_sense(drive, NULL, NULL); 488 } else { 489 blk_dump_rq_flags(rq, PFX "bad rq"); 490 cdrom_end_request(drive, 0); 491 } 492 493 /* retry, or handle the next request */ 494 return 1; 495 496end_request: 497 if (stat & ATA_ERR) { 498 struct request_queue *q = drive->queue; 499 unsigned long flags; 500 501 spin_lock_irqsave(q->queue_lock, flags); 502 blkdev_dequeue_request(rq); 503 spin_unlock_irqrestore(q->queue_lock, flags); 504 505 hwgroup->rq = NULL; 506 507 cdrom_queue_request_sense(drive, rq->sense, rq); 508 } else 509 cdrom_end_request(drive, 0); 510 511 return 1; 512} 513 514static int cdrom_timer_expiry(ide_drive_t *drive) 515{ 516 struct request *rq = HWGROUP(drive)->rq; 517 unsigned long wait = 0; 518 519 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__, 520 rq->cmd[0]); 521 522 /* 523 * Some commands are *slow* and normally take a long time to complete. 524 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 525 * commands/drives support that. Let ide_timer_expiry keep polling us 526 * for these. 527 */ 528 switch (rq->cmd[0]) { 529 case GPCMD_BLANK: 530 case GPCMD_FORMAT_UNIT: 531 case GPCMD_RESERVE_RZONE_TRACK: 532 case GPCMD_CLOSE_TRACK: 533 case GPCMD_FLUSH_CACHE: 534 wait = ATAPI_WAIT_PC; 535 break; 536 default: 537 if (!(rq->cmd_flags & REQ_QUIET)) 538 printk(KERN_INFO PFX "cmd 0x%x timed out\n", 539 rq->cmd[0]); 540 wait = 0; 541 break; 542 } 543 return wait; 544} 545 546/* 547 * Set up the device registers for transferring a packet command on DEV, 548 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 549 * which actually transfers the command to the drive. If this is a 550 * drq_interrupt device, this routine will arrange for HANDLER to be 551 * called when the interrupt from the drive arrives. Otherwise, HANDLER 552 * will be called immediately after the drive is prepared for the transfer. 553 */ 554static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 555 int xferlen, 556 ide_handler_t *handler) 557{ 558 ide_hwif_t *hwif = drive->hwif; 559 560 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen); 561 562 /* FIXME: for Virtual DMA we must check harder */ 563 if (drive->dma) 564 drive->dma = !hwif->dma_ops->dma_setup(drive); 565 566 /* set up the controller registers */ 567 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, 568 xferlen, drive->dma); 569 570 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 571 /* waiting for CDB interrupt, not DMA yet. */ 572 if (drive->dma) 573 drive->waiting_for_dma = 0; 574 575 /* packet command */ 576 ide_execute_command(drive, ATA_CMD_PACKET, handler, 577 ATAPI_WAIT_PC, cdrom_timer_expiry); 578 return ide_started; 579 } else { 580 ide_execute_pkt_cmd(drive); 581 582 return (*handler) (drive); 583 } 584} 585 586/* 587 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 588 * registers must have already been prepared by cdrom_start_packet_command. 589 * HANDLER is the interrupt handler to call when the command completes or 590 * there's data ready. 591 */ 592#define ATAPI_MIN_CDB_BYTES 12 593static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 594 struct request *rq, 595 ide_handler_t *handler) 596{ 597 ide_hwif_t *hwif = drive->hwif; 598 int cmd_len; 599 ide_startstop_t startstop; 600 601 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__); 602 603 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 604 /* 605 * Here we should have been called after receiving an interrupt 606 * from the device. DRQ should how be set. 607 */ 608 609 /* check for errors */ 610 if (cdrom_decode_status(drive, ATA_DRQ, NULL)) 611 return ide_stopped; 612 613 /* ok, next interrupt will be DMA interrupt */ 614 if (drive->dma) 615 drive->waiting_for_dma = 1; 616 } else { 617 /* otherwise, we must wait for DRQ to get set */ 618 if (ide_wait_stat(&startstop, drive, ATA_DRQ, 619 ATA_BUSY, WAIT_READY)) 620 return startstop; 621 } 622 623 /* arm the interrupt handler */ 624 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 625 626 /* ATAPI commands get padded out to 12 bytes minimum */ 627 cmd_len = COMMAND_SIZE(rq->cmd[0]); 628 if (cmd_len < ATAPI_MIN_CDB_BYTES) 629 cmd_len = ATAPI_MIN_CDB_BYTES; 630 631 /* send the command to the device */ 632 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); 633 634 /* start the DMA if need be */ 635 if (drive->dma) 636 hwif->dma_ops->dma_start(drive); 637 638 return ide_started; 639} 640 641/* 642 * Check the contents of the interrupt reason register from the cdrom 643 * and attempt to recover if there are problems. Returns 0 if everything's 644 * ok; nonzero if the request has been terminated. 645 */ 646static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 647 int len, int ireason, int rw) 648{ 649 ide_hwif_t *hwif = drive->hwif; 650 651 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n", 652 __func__, ireason, rw); 653 654 /* 655 * ireason == 0: the drive wants to receive data from us 656 * ireason == 2: the drive is expecting to transfer data to us 657 */ 658 if (ireason == (!rw << 1)) 659 return 0; 660 else if (ireason == (rw << 1)) { 661 662 /* whoops... */ 663 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 664 drive->name, __func__); 665 666 ide_pad_transfer(drive, rw, len); 667 } else if (rw == 0 && ireason == 1) { 668 /* 669 * Some drives (ASUS) seem to tell us that status info is 670 * available. Just get it and ignore. 671 */ 672 (void)hwif->tp_ops->read_status(hwif); 673 return 0; 674 } else { 675 /* drive wants a command packet, or invalid ireason... */ 676 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 677 drive->name, __func__, ireason); 678 } 679 680 if (rq->cmd_type == REQ_TYPE_ATA_PC) 681 rq->cmd_flags |= REQ_FAILED; 682 683 cdrom_end_request(drive, 0); 684 return -1; 685} 686 687/* 688 * Assume that the drive will always provide data in multiples of at least 689 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 690 */ 691static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 692{ 693 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len); 694 695 if ((len % SECTOR_SIZE) == 0) 696 return 0; 697 698 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 699 __func__, len); 700 701 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 702 printk(KERN_ERR PFX "This drive is not supported by this " 703 "version of the driver\n"); 704 else { 705 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 706 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 707 } 708 709 return 1; 710} 711 712static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 713 714static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 715 struct request *rq) 716{ 717 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__, 718 rq->cmd_flags); 719 720 if (rq_data_dir(rq) == READ) { 721 unsigned short sectors_per_frame = 722 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 723 int nskip = rq->sector & (sectors_per_frame - 1); 724 725 /* 726 * If the requested sector doesn't start on a frame boundary, 727 * we must adjust the start of the transfer so that it does, 728 * and remember to skip the first few sectors. 729 * 730 * If the rq->current_nr_sectors field is larger than the size 731 * of the buffer, it will mean that we're to skip a number of 732 * sectors equal to the amount by which rq->current_nr_sectors 733 * is larger than the buffer size. 734 */ 735 if (nskip > 0) { 736 /* sanity check... */ 737 if (rq->current_nr_sectors != 738 bio_cur_sectors(rq->bio)) { 739 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 740 drive->name, __func__, 741 rq->current_nr_sectors); 742 cdrom_end_request(drive, 0); 743 return ide_stopped; 744 } 745 rq->current_nr_sectors += nskip; 746 } 747 } 748 749 /* set up the command */ 750 rq->timeout = ATAPI_WAIT_PC; 751 752 return ide_started; 753} 754 755/* 756 * Routine to send a read/write packet command to the drive. This is usually 757 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 758 * devices, it is called from an interrupt when the drive is ready to accept 759 * the command. 760 */ 761static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 762{ 763 struct request *rq = drive->hwif->hwgroup->rq; 764 765 /* send the command to the drive and return */ 766 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 767} 768 769/* 770 * Fix up a possibly partially-processed request so that we can start it over 771 * entirely, or even put it back on the request queue. 772 */ 773static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 774{ 775 776 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 777 778 if (rq->buffer != bio_data(rq->bio)) { 779 sector_t n = 780 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 781 782 rq->buffer = bio_data(rq->bio); 783 rq->nr_sectors += n; 784 rq->sector -= n; 785 } 786 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 787 rq->hard_cur_sectors = rq->current_nr_sectors; 788 rq->hard_nr_sectors = rq->nr_sectors; 789 rq->hard_sector = rq->sector; 790 rq->q->prep_rq_fn(rq->q, rq); 791} 792 793static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 794{ 795 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n", 796 __func__, rq->cmd[0]); 797 798 /* 799 * Some of the trailing request sense fields are optional, 800 * and some drives don't send them. Sigh. 801 */ 802 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 803 rq->data_len > 0 && rq->data_len <= 5) 804 while (rq->data_len > 0) { 805 *(u8 *)rq->data++ = 0; 806 --rq->data_len; 807 } 808} 809 810int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 811 int write, void *buffer, unsigned *bufflen, 812 struct request_sense *sense, int timeout, 813 unsigned int cmd_flags) 814{ 815 struct cdrom_info *info = drive->driver_data; 816 struct request_sense local_sense; 817 int retries = 10; 818 unsigned int flags = 0; 819 820 if (!sense) 821 sense = &local_sense; 822 823 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, " 824 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write, 825 timeout, cmd_flags); 826 827 /* start of retry loop */ 828 do { 829 struct request *rq; 830 int error; 831 832 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 833 834 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 835 rq->cmd_type = REQ_TYPE_ATA_PC; 836 rq->sense = sense; 837 rq->cmd_flags |= cmd_flags; 838 rq->timeout = timeout; 839 if (buffer) { 840 rq->data = buffer; 841 rq->data_len = *bufflen; 842 } 843 844 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 845 846 if (buffer) 847 *bufflen = rq->data_len; 848 849 flags = rq->cmd_flags; 850 blk_put_request(rq); 851 852 /* 853 * FIXME: we should probably abort/retry or something in case of 854 * failure. 855 */ 856 if (flags & REQ_FAILED) { 857 /* 858 * The request failed. Retry if it was due to a unit 859 * attention status (usually means media was changed). 860 */ 861 struct request_sense *reqbuf = sense; 862 863 if (reqbuf->sense_key == UNIT_ATTENTION) 864 cdrom_saw_media_change(drive); 865 else if (reqbuf->sense_key == NOT_READY && 866 reqbuf->asc == 4 && reqbuf->ascq != 4) { 867 /* 868 * The drive is in the process of loading 869 * a disk. Retry, but wait a little to give 870 * the drive time to complete the load. 871 */ 872 ssleep(2); 873 } else { 874 /* otherwise, don't retry */ 875 retries = 0; 876 } 877 --retries; 878 } 879 880 /* end of retry loop */ 881 } while ((flags & REQ_FAILED) && retries >= 0); 882 883 /* return an error if the command failed */ 884 return (flags & REQ_FAILED) ? -EIO : 0; 885} 886 887/* 888 * Called from blk_end_request_callback() after the data of the request is 889 * completed and before the request itself is completed. By returning value '1', 890 * blk_end_request_callback() returns immediately without completing it. 891 */ 892static int cdrom_newpc_intr_dummy_cb(struct request *rq) 893{ 894 return 1; 895} 896 897static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 898{ 899 ide_hwif_t *hwif = drive->hwif; 900 ide_hwgroup_t *hwgroup = hwif->hwgroup; 901 struct request *rq = hwgroup->rq; 902 xfer_func_t *xferfunc; 903 ide_expiry_t *expiry = NULL; 904 int dma_error = 0, dma, stat, thislen, uptodate = 0; 905 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 906 unsigned int timeout; 907 u16 len; 908 u8 ireason; 909 910 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n", 911 __func__, rq->cmd[0], write); 912 913 /* check for errors */ 914 dma = drive->dma; 915 if (dma) { 916 drive->dma = 0; 917 dma_error = hwif->dma_ops->dma_end(drive); 918 if (dma_error) { 919 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 920 write ? "write" : "read"); 921 ide_dma_off(drive); 922 } 923 } 924 925 if (cdrom_decode_status(drive, 0, &stat)) 926 return ide_stopped; 927 928 /* using dma, transfer is complete now */ 929 if (dma) { 930 if (dma_error) 931 return ide_error(drive, "dma error", stat); 932 if (blk_fs_request(rq)) { 933 ide_end_request(drive, 1, rq->nr_sectors); 934 return ide_stopped; 935 } 936 goto end_request; 937 } 938 939 ide_read_bcount_and_ireason(drive, &len, &ireason); 940 941 thislen = blk_fs_request(rq) ? len : rq->data_len; 942 if (thislen > len) 943 thislen = len; 944 945 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n", 946 __func__, stat, thislen); 947 948 /* If DRQ is clear, the command has completed. */ 949 if ((stat & ATA_DRQ) == 0) { 950 if (blk_fs_request(rq)) { 951 /* 952 * If we're not done reading/writing, complain. 953 * Otherwise, complete the command normally. 954 */ 955 uptodate = 1; 956 if (rq->current_nr_sectors > 0) { 957 printk(KERN_ERR PFX "%s: %s: data underrun " 958 "(%d blocks)\n", 959 drive->name, __func__, 960 rq->current_nr_sectors); 961 if (!write) 962 rq->cmd_flags |= REQ_FAILED; 963 uptodate = 0; 964 } 965 cdrom_end_request(drive, uptodate); 966 return ide_stopped; 967 } else if (!blk_pc_request(rq)) { 968 ide_cd_request_sense_fixup(drive, rq); 969 /* complain if we still have data left to transfer */ 970 uptodate = rq->data_len ? 0 : 1; 971 } 972 goto end_request; 973 } 974 975 /* check which way to transfer data */ 976 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 977 return ide_stopped; 978 979 if (blk_fs_request(rq)) { 980 if (write == 0) { 981 int nskip; 982 983 if (ide_cd_check_transfer_size(drive, len)) { 984 cdrom_end_request(drive, 0); 985 return ide_stopped; 986 } 987 988 /* 989 * First, figure out if we need to bit-bucket 990 * any of the leading sectors. 991 */ 992 nskip = min_t(int, rq->current_nr_sectors 993 - bio_cur_sectors(rq->bio), 994 thislen >> 9); 995 if (nskip > 0) { 996 ide_pad_transfer(drive, write, nskip << 9); 997 rq->current_nr_sectors -= nskip; 998 thislen -= (nskip << 9); 999 } 1000 } 1001 } 1002 1003 if (ireason == 0) { 1004 write = 1; 1005 xferfunc = hwif->tp_ops->output_data; 1006 } else { 1007 write = 0; 1008 xferfunc = hwif->tp_ops->input_data; 1009 } 1010 1011 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, " 1012 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason); 1013 1014 /* transfer data */ 1015 while (thislen > 0) { 1016 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1017 int blen = rq->data_len; 1018 1019 /* bio backed? */ 1020 if (rq->bio) { 1021 if (blk_fs_request(rq)) { 1022 ptr = rq->buffer; 1023 blen = rq->current_nr_sectors << 9; 1024 } else { 1025 ptr = bio_data(rq->bio); 1026 blen = bio_iovec(rq->bio)->bv_len; 1027 } 1028 } 1029 1030 if (!ptr) { 1031 if (blk_fs_request(rq) && !write) 1032 /* 1033 * If the buffers are full, pipe the rest into 1034 * oblivion. 1035 */ 1036 ide_pad_transfer(drive, 0, thislen); 1037 else { 1038 printk(KERN_ERR PFX "%s: confused, missing data\n", 1039 drive->name); 1040 blk_dump_rq_flags(rq, rq_data_dir(rq) 1041 ? "cdrom_newpc_intr, write" 1042 : "cdrom_newpc_intr, read"); 1043 } 1044 break; 1045 } 1046 1047 if (blen > thislen) 1048 blen = thislen; 1049 1050 xferfunc(drive, NULL, ptr, blen); 1051 1052 thislen -= blen; 1053 len -= blen; 1054 1055 if (blk_fs_request(rq)) { 1056 rq->buffer += blen; 1057 rq->nr_sectors -= (blen >> 9); 1058 rq->current_nr_sectors -= (blen >> 9); 1059 rq->sector += (blen >> 9); 1060 1061 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1062 cdrom_end_request(drive, 1); 1063 } else { 1064 rq->data_len -= blen; 1065 1066 /* 1067 * The request can't be completed until DRQ is cleared. 1068 * So complete the data, but don't complete the request 1069 * using the dummy function for the callback feature 1070 * of blk_end_request_callback(). 1071 */ 1072 if (rq->bio) 1073 blk_end_request_callback(rq, 0, blen, 1074 cdrom_newpc_intr_dummy_cb); 1075 else 1076 rq->data += blen; 1077 } 1078 if (!write && blk_sense_request(rq)) 1079 rq->sense_len += blen; 1080 } 1081 1082 /* pad, if necessary */ 1083 if (!blk_fs_request(rq) && len > 0) 1084 ide_pad_transfer(drive, write, len); 1085 1086 if (blk_pc_request(rq)) { 1087 timeout = rq->timeout; 1088 } else { 1089 timeout = ATAPI_WAIT_PC; 1090 if (!blk_fs_request(rq)) 1091 expiry = cdrom_timer_expiry; 1092 } 1093 1094 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1095 return ide_started; 1096 1097end_request: 1098 if (blk_pc_request(rq)) { 1099 unsigned int dlen = rq->data_len; 1100 1101 if (dma) 1102 rq->data_len = 0; 1103 1104 if (blk_end_request(rq, 0, dlen)) 1105 BUG(); 1106 1107 hwgroup->rq = NULL; 1108 } else { 1109 if (!uptodate) 1110 rq->cmd_flags |= REQ_FAILED; 1111 cdrom_end_request(drive, uptodate); 1112 } 1113 return ide_stopped; 1114} 1115 1116static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1117{ 1118 struct cdrom_info *cd = drive->driver_data; 1119 int write = rq_data_dir(rq) == WRITE; 1120 unsigned short sectors_per_frame = 1121 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1122 1123 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, " 1124 "secs_per_frame: %u\n", 1125 __func__, rq->cmd[0], write, sectors_per_frame); 1126 1127 if (write) { 1128 /* disk has become write protected */ 1129 if (get_disk_ro(cd->disk)) { 1130 cdrom_end_request(drive, 0); 1131 return ide_stopped; 1132 } 1133 } else { 1134 /* 1135 * We may be retrying this request after an error. Fix up any 1136 * weirdness which might be present in the request packet. 1137 */ 1138 ide_cd_restore_request(drive, rq); 1139 } 1140 1141 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1142 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1143 (rq->sector & (sectors_per_frame - 1))) { 1144 if (write) { 1145 cdrom_end_request(drive, 0); 1146 return ide_stopped; 1147 } 1148 drive->dma = 0; 1149 } else 1150 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1151 1152 if (write) 1153 cd->devinfo.media_written = 1; 1154 1155 return ide_started; 1156} 1157 1158static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1159{ 1160 struct request *rq = HWGROUP(drive)->rq; 1161 1162 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1163} 1164 1165static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1166{ 1167 1168 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, " 1169 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0], 1170 rq->cmd_type); 1171 1172 if (blk_pc_request(rq)) 1173 rq->cmd_flags |= REQ_QUIET; 1174 else 1175 rq->cmd_flags &= ~REQ_FAILED; 1176 1177 drive->dma = 0; 1178 1179 /* sg request */ 1180 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1181 struct request_queue *q = drive->queue; 1182 unsigned int alignment; 1183 char *buf; 1184 1185 if (rq->bio) 1186 buf = bio_data(rq->bio); 1187 else 1188 buf = rq->data; 1189 1190 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1191 1192 /* 1193 * check if dma is safe 1194 * 1195 * NOTE! The "len" and "addr" checks should possibly have 1196 * separate masks. 1197 */ 1198 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1199 if ((unsigned long)buf & alignment 1200 || rq->data_len & q->dma_pad_mask 1201 || object_is_on_stack(buf)) 1202 drive->dma = 0; 1203 } 1204} 1205 1206static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1207 sector_t block) 1208{ 1209 ide_handler_t *fn; 1210 int xferlen; 1211 1212 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, " 1213 "rq->cmd_type: 0x%x, block: %llu\n", 1214 __func__, rq->cmd[0], rq->cmd_type, 1215 (unsigned long long)block); 1216 1217 xferlen = ide_cd_get_xferlen(rq); 1218 1219 if (blk_fs_request(rq)) { 1220 fn = cdrom_start_rw_cont; 1221 1222 if (cdrom_start_rw(drive, rq) == ide_stopped) 1223 return ide_stopped; 1224 1225 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1226 return ide_stopped; 1227 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1228 rq->cmd_type == REQ_TYPE_ATA_PC) { 1229 fn = cdrom_do_newpc_cont; 1230 1231 if (!rq->timeout) 1232 rq->timeout = ATAPI_WAIT_PC; 1233 1234 cdrom_do_block_pc(drive, rq); 1235 } else if (blk_special_request(rq)) { 1236 /* right now this can only be a reset... */ 1237 cdrom_end_request(drive, 1); 1238 return ide_stopped; 1239 } else { 1240 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1241 cdrom_end_request(drive, 0); 1242 return ide_stopped; 1243 } 1244 1245 return cdrom_start_packet_command(drive, xferlen, fn); 1246} 1247 1248/* 1249 * Ioctl handling. 1250 * 1251 * Routines which queue packet commands take as a final argument a pointer to a 1252 * request_sense struct. If execution of the command results in an error with a 1253 * CHECK CONDITION status, this structure will be filled with the results of the 1254 * subsequent request sense command. The pointer can also be NULL, in which case 1255 * no sense information is returned. 1256 */ 1257static void msf_from_bcd(struct atapi_msf *msf) 1258{ 1259 msf->minute = bcd2bin(msf->minute); 1260 msf->second = bcd2bin(msf->second); 1261 msf->frame = bcd2bin(msf->frame); 1262} 1263 1264int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1265{ 1266 struct cdrom_info *info = drive->driver_data; 1267 struct cdrom_device_info *cdi = &info->devinfo; 1268 unsigned char cmd[BLK_MAX_CDB]; 1269 1270 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1271 1272 memset(cmd, 0, BLK_MAX_CDB); 1273 cmd[0] = GPCMD_TEST_UNIT_READY; 1274 1275 /* 1276 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1277 * instead of supporting the LOAD_UNLOAD opcode. 1278 */ 1279 cmd[7] = cdi->sanyo_slot % 3; 1280 1281 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1282} 1283 1284static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1285 unsigned long *sectors_per_frame, 1286 struct request_sense *sense) 1287{ 1288 struct { 1289 __be32 lba; 1290 __be32 blocklen; 1291 } capbuf; 1292 1293 int stat; 1294 unsigned char cmd[BLK_MAX_CDB]; 1295 unsigned len = sizeof(capbuf); 1296 u32 blocklen; 1297 1298 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1299 1300 memset(cmd, 0, BLK_MAX_CDB); 1301 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1302 1303 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1304 REQ_QUIET); 1305 if (stat) 1306 return stat; 1307 1308 /* 1309 * Sanity check the given block size 1310 */ 1311 blocklen = be32_to_cpu(capbuf.blocklen); 1312 switch (blocklen) { 1313 case 512: 1314 case 1024: 1315 case 2048: 1316 case 4096: 1317 break; 1318 default: 1319 printk(KERN_ERR PFX "%s: weird block size %u\n", 1320 drive->name, blocklen); 1321 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1322 drive->name); 1323 blocklen = 2048; 1324 break; 1325 } 1326 1327 *capacity = 1 + be32_to_cpu(capbuf.lba); 1328 *sectors_per_frame = blocklen >> SECTOR_BITS; 1329 1330 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n", 1331 __func__, *capacity, *sectors_per_frame); 1332 1333 return 0; 1334} 1335 1336static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1337 int format, char *buf, int buflen, 1338 struct request_sense *sense) 1339{ 1340 unsigned char cmd[BLK_MAX_CDB]; 1341 1342 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1343 1344 memset(cmd, 0, BLK_MAX_CDB); 1345 1346 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1347 cmd[6] = trackno; 1348 cmd[7] = (buflen >> 8); 1349 cmd[8] = (buflen & 0xff); 1350 cmd[9] = (format << 6); 1351 1352 if (msf_flag) 1353 cmd[1] = 2; 1354 1355 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1356} 1357 1358/* Try to read the entire TOC for the disk into our internal buffer. */ 1359int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1360{ 1361 int stat, ntracks, i; 1362 struct cdrom_info *info = drive->driver_data; 1363 struct cdrom_device_info *cdi = &info->devinfo; 1364 struct atapi_toc *toc = info->toc; 1365 struct { 1366 struct atapi_toc_header hdr; 1367 struct atapi_toc_entry ent; 1368 } ms_tmp; 1369 long last_written; 1370 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1371 1372 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1373 1374 if (toc == NULL) { 1375 /* try to allocate space */ 1376 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1377 if (toc == NULL) { 1378 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1379 drive->name); 1380 return -ENOMEM; 1381 } 1382 info->toc = toc; 1383 } 1384 1385 /* 1386 * Check to see if the existing data is still valid. If it is, 1387 * just return. 1388 */ 1389 (void) cdrom_check_status(drive, sense); 1390 1391 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1392 return 0; 1393 1394 /* try to get the total cdrom capacity and sector size */ 1395 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1396 sense); 1397 if (stat) 1398 toc->capacity = 0x1fffff; 1399 1400 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1401 /* save a private copy of the TOC capacity for error handling */ 1402 drive->probed_capacity = toc->capacity * sectors_per_frame; 1403 1404 blk_queue_hardsect_size(drive->queue, 1405 sectors_per_frame << SECTOR_BITS); 1406 1407 /* first read just the header, so we know how long the TOC is */ 1408 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1409 sizeof(struct atapi_toc_header), sense); 1410 if (stat) 1411 return stat; 1412 1413 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1414 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1415 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1416 } 1417 1418 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1419 if (ntracks <= 0) 1420 return -EIO; 1421 if (ntracks > MAX_TRACKS) 1422 ntracks = MAX_TRACKS; 1423 1424 /* now read the whole schmeer */ 1425 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1426 (char *)&toc->hdr, 1427 sizeof(struct atapi_toc_header) + 1428 (ntracks + 1) * 1429 sizeof(struct atapi_toc_entry), sense); 1430 1431 if (stat && toc->hdr.first_track > 1) { 1432 /* 1433 * Cds with CDI tracks only don't have any TOC entries, despite 1434 * of this the returned values are 1435 * first_track == last_track = number of CDI tracks + 1, 1436 * so that this case is indistinguishable from the same layout 1437 * plus an additional audio track. If we get an error for the 1438 * regular case, we assume a CDI without additional audio 1439 * tracks. In this case the readable TOC is empty (CDI tracks 1440 * are not included) and only holds the Leadout entry. 1441 * 1442 * Heiko Eißfeldt. 1443 */ 1444 ntracks = 0; 1445 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1446 (char *)&toc->hdr, 1447 sizeof(struct atapi_toc_header) + 1448 (ntracks + 1) * 1449 sizeof(struct atapi_toc_entry), 1450 sense); 1451 if (stat) 1452 return stat; 1453 1454 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1455 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1456 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1457 } else { 1458 toc->hdr.first_track = CDROM_LEADOUT; 1459 toc->hdr.last_track = CDROM_LEADOUT; 1460 } 1461 } 1462 1463 if (stat) 1464 return stat; 1465 1466 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1467 1468 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1469 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1470 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1471 } 1472 1473 for (i = 0; i <= ntracks; i++) { 1474 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1475 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1476 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1477 msf_from_bcd(&toc->ent[i].addr.msf); 1478 } 1479 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1480 toc->ent[i].addr.msf.second, 1481 toc->ent[i].addr.msf.frame); 1482 } 1483 1484 if (toc->hdr.first_track != CDROM_LEADOUT) { 1485 /* read the multisession information */ 1486 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1487 sizeof(ms_tmp), sense); 1488 if (stat) 1489 return stat; 1490 1491 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1492 } else { 1493 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1494 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1495 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1496 } 1497 1498 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1499 /* re-read multisession information using MSF format */ 1500 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1501 sizeof(ms_tmp), sense); 1502 if (stat) 1503 return stat; 1504 1505 msf_from_bcd(&ms_tmp.ent.addr.msf); 1506 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1507 ms_tmp.ent.addr.msf.second, 1508 ms_tmp.ent.addr.msf.frame); 1509 } 1510 1511 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1512 1513 /* now try to get the total cdrom capacity */ 1514 stat = cdrom_get_last_written(cdi, &last_written); 1515 if (!stat && (last_written > toc->capacity)) { 1516 toc->capacity = last_written; 1517 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1518 drive->probed_capacity = toc->capacity * sectors_per_frame; 1519 } 1520 1521 /* Remember that we've read this stuff. */ 1522 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1523 1524 return 0; 1525} 1526 1527int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1528{ 1529 struct cdrom_info *info = drive->driver_data; 1530 struct cdrom_device_info *cdi = &info->devinfo; 1531 struct packet_command cgc; 1532 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1533 1534 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1535 1536 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1537 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1538 1539 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1540 do { 1541 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1542 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1543 if (!stat) 1544 break; 1545 } while (--attempts); 1546 return stat; 1547} 1548 1549void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1550{ 1551 struct cdrom_info *cd = drive->driver_data; 1552 u16 curspeed, maxspeed; 1553 1554 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1555 1556 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1557 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1558 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1559 } else { 1560 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1561 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1562 } 1563 1564 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n", 1565 __func__, curspeed, maxspeed); 1566 1567 cd->current_speed = (curspeed + (176/2)) / 176; 1568 cd->max_speed = (maxspeed + (176/2)) / 176; 1569} 1570 1571#define IDE_CD_CAPABILITIES \ 1572 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1573 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1574 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1575 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1576 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1577 1578static struct cdrom_device_ops ide_cdrom_dops = { 1579 .open = ide_cdrom_open_real, 1580 .release = ide_cdrom_release_real, 1581 .drive_status = ide_cdrom_drive_status, 1582 .media_changed = ide_cdrom_check_media_change_real, 1583 .tray_move = ide_cdrom_tray_move, 1584 .lock_door = ide_cdrom_lock_door, 1585 .select_speed = ide_cdrom_select_speed, 1586 .get_last_session = ide_cdrom_get_last_session, 1587 .get_mcn = ide_cdrom_get_mcn, 1588 .reset = ide_cdrom_reset, 1589 .audio_ioctl = ide_cdrom_audio_ioctl, 1590 .capability = IDE_CD_CAPABILITIES, 1591 .generic_packet = ide_cdrom_packet, 1592}; 1593 1594static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1595{ 1596 struct cdrom_info *info = drive->driver_data; 1597 struct cdrom_device_info *devinfo = &info->devinfo; 1598 1599 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots); 1600 1601 devinfo->ops = &ide_cdrom_dops; 1602 devinfo->speed = info->current_speed; 1603 devinfo->capacity = nslots; 1604 devinfo->handle = drive; 1605 strcpy(devinfo->name, drive->name); 1606 1607 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1608 devinfo->mask |= CDC_SELECT_SPEED; 1609 1610 devinfo->disk = info->disk; 1611 return register_cdrom(devinfo); 1612} 1613 1614static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1615{ 1616 struct cdrom_info *cd = drive->driver_data; 1617 struct cdrom_device_info *cdi = &cd->devinfo; 1618 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1619 mechtype_t mechtype; 1620 int nslots = 1; 1621 1622 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, " 1623 "drive->atapi_flags: 0x%lx\n", __func__, drive->media, 1624 drive->atapi_flags); 1625 1626 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1627 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1628 CDC_MO_DRIVE | CDC_RAM); 1629 1630 if (drive->media == ide_optical) { 1631 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1632 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1633 drive->name); 1634 return nslots; 1635 } 1636 1637 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1638 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1639 cdi->mask &= ~CDC_PLAY_AUDIO; 1640 return nslots; 1641 } 1642 1643 /* 1644 * We have to cheat a little here. the packet will eventually be queued 1645 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1646 * Since this device hasn't been registered with the Uniform layer yet, 1647 * it can't do this. Same goes for cdi->ops. 1648 */ 1649 cdi->handle = drive; 1650 cdi->ops = &ide_cdrom_dops; 1651 1652 if (ide_cdrom_get_capabilities(drive, buf)) 1653 return 0; 1654 1655 if ((buf[8 + 6] & 0x01) == 0) 1656 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1657 if (buf[8 + 6] & 0x08) 1658 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1659 if (buf[8 + 3] & 0x01) 1660 cdi->mask &= ~CDC_CD_R; 1661 if (buf[8 + 3] & 0x02) 1662 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1663 if (buf[8 + 2] & 0x38) 1664 cdi->mask &= ~CDC_DVD; 1665 if (buf[8 + 3] & 0x20) 1666 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1667 if (buf[8 + 3] & 0x10) 1668 cdi->mask &= ~CDC_DVD_R; 1669 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1670 cdi->mask &= ~CDC_PLAY_AUDIO; 1671 1672 mechtype = buf[8 + 6] >> 5; 1673 if (mechtype == mechtype_caddy || 1674 mechtype == mechtype_popup || 1675 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1676 cdi->mask |= CDC_CLOSE_TRAY; 1677 1678 if (cdi->sanyo_slot > 0) { 1679 cdi->mask &= ~CDC_SELECT_DISC; 1680 nslots = 3; 1681 } else if (mechtype == mechtype_individual_changer || 1682 mechtype == mechtype_cartridge_changer) { 1683 nslots = cdrom_number_of_slots(cdi); 1684 if (nslots > 1) 1685 cdi->mask &= ~CDC_SELECT_DISC; 1686 } 1687 1688 ide_cdrom_update_speed(drive, buf); 1689 1690 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1691 1692 /* don't print speed if the drive reported 0 */ 1693 if (cd->max_speed) 1694 printk(KERN_CONT " %dX", cd->max_speed); 1695 1696 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1697 1698 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1699 printk(KERN_CONT " DVD%s%s", 1700 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1701 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1702 1703 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1704 printk(KERN_CONT " CD%s%s", 1705 (cdi->mask & CDC_CD_R) ? "" : "-R", 1706 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1707 1708 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1709 printk(KERN_CONT " changer w/%d slots", nslots); 1710 else 1711 printk(KERN_CONT " drive"); 1712 1713 printk(KERN_CONT ", %dkB Cache\n", 1714 be16_to_cpup((__be16 *)&buf[8 + 12])); 1715 1716 return nslots; 1717} 1718 1719/* standard prep_rq_fn that builds 10 byte cmds */ 1720static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1721{ 1722 int hard_sect = queue_hardsect_size(q); 1723 long block = (long)rq->hard_sector / (hard_sect >> 9); 1724 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1725 1726 memset(rq->cmd, 0, BLK_MAX_CDB); 1727 1728 if (rq_data_dir(rq) == READ) 1729 rq->cmd[0] = GPCMD_READ_10; 1730 else 1731 rq->cmd[0] = GPCMD_WRITE_10; 1732 1733 /* 1734 * fill in lba 1735 */ 1736 rq->cmd[2] = (block >> 24) & 0xff; 1737 rq->cmd[3] = (block >> 16) & 0xff; 1738 rq->cmd[4] = (block >> 8) & 0xff; 1739 rq->cmd[5] = block & 0xff; 1740 1741 /* 1742 * and transfer length 1743 */ 1744 rq->cmd[7] = (blocks >> 8) & 0xff; 1745 rq->cmd[8] = blocks & 0xff; 1746 rq->cmd_len = 10; 1747 return BLKPREP_OK; 1748} 1749 1750/* 1751 * Most of the SCSI commands are supported directly by ATAPI devices. 1752 * This transform handles the few exceptions. 1753 */ 1754static int ide_cdrom_prep_pc(struct request *rq) 1755{ 1756 u8 *c = rq->cmd; 1757 1758 /* transform 6-byte read/write commands to the 10-byte version */ 1759 if (c[0] == READ_6 || c[0] == WRITE_6) { 1760 c[8] = c[4]; 1761 c[5] = c[3]; 1762 c[4] = c[2]; 1763 c[3] = c[1] & 0x1f; 1764 c[2] = 0; 1765 c[1] &= 0xe0; 1766 c[0] += (READ_10 - READ_6); 1767 rq->cmd_len = 10; 1768 return BLKPREP_OK; 1769 } 1770 1771 /* 1772 * it's silly to pretend we understand 6-byte sense commands, just 1773 * reject with ILLEGAL_REQUEST and the caller should take the 1774 * appropriate action 1775 */ 1776 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1777 rq->errors = ILLEGAL_REQUEST; 1778 return BLKPREP_KILL; 1779 } 1780 1781 return BLKPREP_OK; 1782} 1783 1784static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1785{ 1786 if (blk_fs_request(rq)) 1787 return ide_cdrom_prep_fs(q, rq); 1788 else if (blk_pc_request(rq)) 1789 return ide_cdrom_prep_pc(rq); 1790 1791 return 0; 1792} 1793 1794struct cd_list_entry { 1795 const char *id_model; 1796 const char *id_firmware; 1797 unsigned int cd_flags; 1798}; 1799 1800#ifdef CONFIG_IDE_PROC_FS 1801static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1802{ 1803 unsigned long capacity, sectors_per_frame; 1804 1805 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1806 return 0; 1807 1808 return capacity * sectors_per_frame; 1809} 1810 1811static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1812 int count, int *eof, void *data) 1813{ 1814 ide_drive_t *drive = data; 1815 int len; 1816 1817 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1818 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1819} 1820 1821static ide_proc_entry_t idecd_proc[] = { 1822 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1823 { NULL, 0, NULL, NULL } 1824}; 1825 1826static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1827{ 1828 return idecd_proc; 1829} 1830 1831static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1832{ 1833 return NULL; 1834} 1835#endif 1836 1837static const struct cd_list_entry ide_cd_quirks_list[] = { 1838 /* Limit transfer size per interrupt. */ 1839 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1840 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1841 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1842 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1843 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1844 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1845 IDE_AFLAG_PRE_ATAPI12, }, 1846 /* Vertos 300, some versions of this drive like to talk BCD. */ 1847 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1848 /* Vertos 600 ESD. */ 1849 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1850 /* 1851 * Sanyo 3 CD changer uses a non-standard command for CD changing 1852 * (by default standard ATAPI support for CD changers is used). 1853 */ 1854 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1855 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1856 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1857 /* Stingray 8X CD-ROM. */ 1858 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1859 /* 1860 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1861 * mode sense page capabilities size, but older drives break. 1862 */ 1863 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1864 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1865 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1866 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1867 /* 1868 * Some drives used by Apple don't advertise audio play 1869 * but they do support reading TOC & audio datas. 1870 */ 1871 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1872 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1873 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1874 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1875 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1876 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1877 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1878 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1879 { NULL, NULL, 0 } 1880}; 1881 1882static unsigned int ide_cd_flags(u16 *id) 1883{ 1884 const struct cd_list_entry *cle = ide_cd_quirks_list; 1885 1886 while (cle->id_model) { 1887 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1888 (cle->id_firmware == NULL || 1889 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1890 return cle->cd_flags; 1891 cle++; 1892 } 1893 1894 return 0; 1895} 1896 1897static int ide_cdrom_setup(ide_drive_t *drive) 1898{ 1899 struct cdrom_info *cd = drive->driver_data; 1900 struct cdrom_device_info *cdi = &cd->devinfo; 1901 u16 *id = drive->id; 1902 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1903 int nslots; 1904 1905 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__); 1906 1907 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1908 blk_queue_dma_alignment(drive->queue, 31); 1909 blk_queue_update_dma_pad(drive->queue, 15); 1910 drive->queue->unplug_delay = (1 * HZ) / 1000; 1911 if (!drive->queue->unplug_delay) 1912 drive->queue->unplug_delay = 1; 1913 1914 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1915 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1916 1917 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1918 fw_rev[4] == '1' && fw_rev[6] <= '2') 1919 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1920 IDE_AFLAG_TOCADDR_AS_BCD); 1921 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1922 fw_rev[4] == '1' && fw_rev[6] <= '2') 1923 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1924 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1925 /* 3 => use CD in slot 0 */ 1926 cdi->sanyo_slot = 3; 1927 1928 nslots = ide_cdrom_probe_capabilities(drive); 1929 1930 /* set correct block size */ 1931 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1932 1933 if (ide_cdrom_register(drive, nslots)) { 1934 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1935 " cdrom driver.\n", drive->name, __func__); 1936 cd->devinfo.handle = NULL; 1937 return 1; 1938 } 1939 1940 ide_proc_register_driver(drive, cd->driver); 1941 return 0; 1942} 1943 1944static void ide_cd_remove(ide_drive_t *drive) 1945{ 1946 struct cdrom_info *info = drive->driver_data; 1947 1948 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1949 1950 ide_proc_unregister_driver(drive, info->driver); 1951 1952 del_gendisk(info->disk); 1953 1954 ide_cd_put(info); 1955} 1956 1957static void ide_cd_release(struct kref *kref) 1958{ 1959 struct cdrom_info *info = to_ide_drv(kref, cdrom_info); 1960 struct cdrom_device_info *devinfo = &info->devinfo; 1961 ide_drive_t *drive = info->drive; 1962 struct gendisk *g = info->disk; 1963 1964 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1965 1966 kfree(info->toc); 1967 if (devinfo->handle == drive) 1968 unregister_cdrom(devinfo); 1969 drive->driver_data = NULL; 1970 blk_queue_prep_rq(drive->queue, NULL); 1971 g->private_data = NULL; 1972 put_disk(g); 1973 kfree(info); 1974} 1975 1976static int ide_cd_probe(ide_drive_t *); 1977 1978static ide_driver_t ide_cdrom_driver = { 1979 .gen_driver = { 1980 .owner = THIS_MODULE, 1981 .name = "ide-cdrom", 1982 .bus = &ide_bus_type, 1983 }, 1984 .probe = ide_cd_probe, 1985 .remove = ide_cd_remove, 1986 .version = IDECD_VERSION, 1987 .do_request = ide_cd_do_request, 1988 .end_request = ide_end_request, 1989 .error = __ide_error, 1990#ifdef CONFIG_IDE_PROC_FS 1991 .proc_entries = ide_cd_proc_entries, 1992 .proc_devsets = ide_cd_proc_devsets, 1993#endif 1994}; 1995 1996static int idecd_open(struct block_device *bdev, fmode_t mode) 1997{ 1998 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1999 int rc = -ENOMEM; 2000 2001 if (!info) 2002 return -ENXIO; 2003 2004 rc = cdrom_open(&info->devinfo, bdev, mode); 2005 2006 if (rc < 0) 2007 ide_cd_put(info); 2008 2009 return rc; 2010} 2011 2012static int idecd_release(struct gendisk *disk, fmode_t mode) 2013{ 2014 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2015 2016 cdrom_release(&info->devinfo, mode); 2017 2018 ide_cd_put(info); 2019 2020 return 0; 2021} 2022 2023static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2024{ 2025 struct packet_command cgc; 2026 char buffer[16]; 2027 int stat; 2028 char spindown; 2029 2030 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 2031 return -EFAULT; 2032 2033 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2034 2035 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2036 if (stat) 2037 return stat; 2038 2039 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 2040 return cdrom_mode_select(cdi, &cgc); 2041} 2042 2043static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2044{ 2045 struct packet_command cgc; 2046 char buffer[16]; 2047 int stat; 2048 char spindown; 2049 2050 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2051 2052 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2053 if (stat) 2054 return stat; 2055 2056 spindown = buffer[11] & 0x0f; 2057 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2058 return -EFAULT; 2059 return 0; 2060} 2061 2062static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 2063 unsigned int cmd, unsigned long arg) 2064{ 2065 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 2066 int err; 2067 2068 switch (cmd) { 2069 case CDROMSETSPINDOWN: 2070 return idecd_set_spindown(&info->devinfo, arg); 2071 case CDROMGETSPINDOWN: 2072 return idecd_get_spindown(&info->devinfo, arg); 2073 default: 2074 break; 2075 } 2076 2077 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 2078 if (err == -EINVAL) 2079 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 2080 2081 return err; 2082} 2083 2084static int idecd_media_changed(struct gendisk *disk) 2085{ 2086 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2087 return cdrom_media_changed(&info->devinfo); 2088} 2089 2090static int idecd_revalidate_disk(struct gendisk *disk) 2091{ 2092 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2093 struct request_sense sense; 2094 2095 ide_cd_read_toc(info->drive, &sense); 2096 2097 return 0; 2098} 2099 2100static struct block_device_operations idecd_ops = { 2101 .owner = THIS_MODULE, 2102 .open = idecd_open, 2103 .release = idecd_release, 2104 .locked_ioctl = idecd_ioctl, 2105 .media_changed = idecd_media_changed, 2106 .revalidate_disk = idecd_revalidate_disk 2107}; 2108 2109/* module options */ 2110static char *ignore; 2111module_param(ignore, charp, 0400); 2112 2113static unsigned long debug_mask; 2114module_param(debug_mask, ulong, 0644); 2115 2116MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2117 2118static int ide_cd_probe(ide_drive_t *drive) 2119{ 2120 struct cdrom_info *info; 2121 struct gendisk *g; 2122 struct request_sense sense; 2123 2124 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, " 2125 "drive->media: 0x%x\n", __func__, drive->driver_req, 2126 drive->media); 2127 2128 if (!strstr("ide-cdrom", drive->driver_req)) 2129 goto failed; 2130 2131 if (drive->media != ide_cdrom && drive->media != ide_optical) 2132 goto failed; 2133 2134 /* skip drives that we were told to ignore */ 2135 if (ignore != NULL) { 2136 if (strstr(ignore, drive->name)) { 2137 printk(KERN_INFO PFX "ignoring drive %s\n", 2138 drive->name); 2139 goto failed; 2140 } 2141 } 2142 2143 drive->debug_mask = debug_mask; 2144 2145 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2146 if (info == NULL) { 2147 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 2148 drive->name); 2149 goto failed; 2150 } 2151 2152 g = alloc_disk(1 << PARTN_BITS); 2153 if (!g) 2154 goto out_free_cd; 2155 2156 ide_init_disk(g, drive); 2157 2158 kref_init(&info->kref); 2159 2160 info->drive = drive; 2161 info->driver = &ide_cdrom_driver; 2162 info->disk = g; 2163 2164 g->private_data = &info->driver; 2165 2166 drive->driver_data = info; 2167 2168 g->minors = 1; 2169 g->driverfs_dev = &drive->gendev; 2170 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2171 if (ide_cdrom_setup(drive)) { 2172 ide_cd_release(&info->kref); 2173 goto failed; 2174 } 2175 2176 ide_cd_read_toc(drive, &sense); 2177 g->fops = &idecd_ops; 2178 g->flags |= GENHD_FL_REMOVABLE; 2179 add_disk(g); 2180 return 0; 2181 2182out_free_cd: 2183 kfree(info); 2184failed: 2185 return -ENODEV; 2186} 2187 2188static void __exit ide_cdrom_exit(void) 2189{ 2190 driver_unregister(&ide_cdrom_driver.gen_driver); 2191} 2192 2193static int __init ide_cdrom_init(void) 2194{ 2195 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2196 return driver_register(&ide_cdrom_driver.gen_driver); 2197} 2198 2199MODULE_ALIAS("ide:*m-cdrom*"); 2200MODULE_ALIAS("ide-cd"); 2201module_init(ide_cdrom_init); 2202module_exit(ide_cdrom_exit); 2203MODULE_LICENSE("GPL"); 2204