ide-cd.c revision 65a3309e552585c4908e50e3c9736afb764c97c0
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 ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *); 515static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 516 517/* 518 * Set up the device registers for transferring a packet command on DEV, 519 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 520 * which actually transfers the command to the drive. If this is a 521 * drq_interrupt device, this routine will arrange for HANDLER to be 522 * called when the interrupt from the drive arrives. Otherwise, HANDLER 523 * will be called immediately after the drive is prepared for the transfer. 524 */ 525static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive) 526{ 527 ide_hwif_t *hwif = drive->hwif; 528 struct request *rq = hwif->hwgroup->rq; 529 int xferlen; 530 531 xferlen = ide_cd_get_xferlen(rq); 532 533 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen); 534 535 /* FIXME: for Virtual DMA we must check harder */ 536 if (drive->dma) 537 drive->dma = !hwif->dma_ops->dma_setup(drive); 538 539 /* set up the controller registers */ 540 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, 541 xferlen, drive->dma); 542 543 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 544 /* waiting for CDB interrupt, not DMA yet. */ 545 if (drive->dma) 546 drive->waiting_for_dma = 0; 547 548 /* packet command */ 549 ide_execute_command(drive, ATA_CMD_PACKET, 550 cdrom_transfer_packet_command, 551 ATAPI_WAIT_PC, ide_cd_expiry); 552 return ide_started; 553 } else { 554 ide_execute_pkt_cmd(drive); 555 556 return cdrom_transfer_packet_command(drive); 557 } 558} 559 560/* 561 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 562 * registers must have already been prepared by cdrom_start_packet_command. 563 * HANDLER is the interrupt handler to call when the command completes or 564 * there's data ready. 565 */ 566#define ATAPI_MIN_CDB_BYTES 12 567static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive) 568{ 569 ide_hwif_t *hwif = drive->hwif; 570 struct request *rq = hwif->hwgroup->rq; 571 int cmd_len; 572 ide_startstop_t startstop; 573 574 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__); 575 576 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 577 /* 578 * Here we should have been called after receiving an interrupt 579 * from the device. DRQ should how be set. 580 */ 581 582 /* check for errors */ 583 if (cdrom_decode_status(drive, ATA_DRQ, NULL)) 584 return ide_stopped; 585 586 /* ok, next interrupt will be DMA interrupt */ 587 if (drive->dma) 588 drive->waiting_for_dma = 1; 589 } else { 590 /* otherwise, we must wait for DRQ to get set */ 591 if (ide_wait_stat(&startstop, drive, ATA_DRQ, 592 ATA_BUSY, WAIT_READY)) 593 return startstop; 594 } 595 596 /* arm the interrupt handler */ 597 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_expiry); 598 599 /* ATAPI commands get padded out to 12 bytes minimum */ 600 cmd_len = COMMAND_SIZE(rq->cmd[0]); 601 if (cmd_len < ATAPI_MIN_CDB_BYTES) 602 cmd_len = ATAPI_MIN_CDB_BYTES; 603 604 /* send the command to the device */ 605 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); 606 607 /* start the DMA if need be */ 608 if (drive->dma) 609 hwif->dma_ops->dma_start(drive); 610 611 return ide_started; 612} 613 614/* 615 * Check the contents of the interrupt reason register from the cdrom 616 * and attempt to recover if there are problems. Returns 0 if everything's 617 * ok; nonzero if the request has been terminated. 618 */ 619static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 620 int len, int ireason, int rw) 621{ 622 ide_hwif_t *hwif = drive->hwif; 623 624 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n", 625 __func__, ireason, rw); 626 627 /* 628 * ireason == 0: the drive wants to receive data from us 629 * ireason == 2: the drive is expecting to transfer data to us 630 */ 631 if (ireason == (!rw << 1)) 632 return 0; 633 else if (ireason == (rw << 1)) { 634 635 /* whoops... */ 636 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 637 drive->name, __func__); 638 639 ide_pad_transfer(drive, rw, len); 640 } else if (rw == 0 && ireason == 1) { 641 /* 642 * Some drives (ASUS) seem to tell us that status info is 643 * available. Just get it and ignore. 644 */ 645 (void)hwif->tp_ops->read_status(hwif); 646 return 0; 647 } else { 648 /* drive wants a command packet, or invalid ireason... */ 649 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 650 drive->name, __func__, ireason); 651 } 652 653 if (rq->cmd_type == REQ_TYPE_ATA_PC) 654 rq->cmd_flags |= REQ_FAILED; 655 656 cdrom_end_request(drive, 0); 657 return -1; 658} 659 660/* 661 * Assume that the drive will always provide data in multiples of at least 662 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 663 */ 664static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 665{ 666 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len); 667 668 if ((len % SECTOR_SIZE) == 0) 669 return 0; 670 671 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 672 __func__, len); 673 674 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 675 printk(KERN_ERR PFX "This drive is not supported by this " 676 "version of the driver\n"); 677 else { 678 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 679 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 680 } 681 682 return 1; 683} 684 685static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 686 struct request *rq) 687{ 688 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__, 689 rq->cmd_flags); 690 691 if (rq_data_dir(rq) == READ) { 692 unsigned short sectors_per_frame = 693 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 694 int nskip = rq->sector & (sectors_per_frame - 1); 695 696 /* 697 * If the requested sector doesn't start on a frame boundary, 698 * we must adjust the start of the transfer so that it does, 699 * and remember to skip the first few sectors. 700 * 701 * If the rq->current_nr_sectors field is larger than the size 702 * of the buffer, it will mean that we're to skip a number of 703 * sectors equal to the amount by which rq->current_nr_sectors 704 * is larger than the buffer size. 705 */ 706 if (nskip > 0) { 707 /* sanity check... */ 708 if (rq->current_nr_sectors != 709 bio_cur_sectors(rq->bio)) { 710 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 711 drive->name, __func__, 712 rq->current_nr_sectors); 713 cdrom_end_request(drive, 0); 714 return ide_stopped; 715 } 716 rq->current_nr_sectors += nskip; 717 } 718 } 719 720 /* set up the command */ 721 rq->timeout = ATAPI_WAIT_PC; 722 723 return ide_started; 724} 725 726/* 727 * Fix up a possibly partially-processed request so that we can start it over 728 * entirely, or even put it back on the request queue. 729 */ 730static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 731{ 732 733 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 734 735 if (rq->buffer != bio_data(rq->bio)) { 736 sector_t n = 737 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 738 739 rq->buffer = bio_data(rq->bio); 740 rq->nr_sectors += n; 741 rq->sector -= n; 742 } 743 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 744 rq->hard_cur_sectors = rq->current_nr_sectors; 745 rq->hard_nr_sectors = rq->nr_sectors; 746 rq->hard_sector = rq->sector; 747 rq->q->prep_rq_fn(rq->q, rq); 748} 749 750static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 751{ 752 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n", 753 __func__, rq->cmd[0]); 754 755 /* 756 * Some of the trailing request sense fields are optional, 757 * and some drives don't send them. Sigh. 758 */ 759 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 760 rq->data_len > 0 && rq->data_len <= 5) 761 while (rq->data_len > 0) { 762 *(u8 *)rq->data++ = 0; 763 --rq->data_len; 764 } 765} 766 767int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 768 int write, void *buffer, unsigned *bufflen, 769 struct request_sense *sense, int timeout, 770 unsigned int cmd_flags) 771{ 772 struct cdrom_info *info = drive->driver_data; 773 struct request_sense local_sense; 774 int retries = 10; 775 unsigned int flags = 0; 776 777 if (!sense) 778 sense = &local_sense; 779 780 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, " 781 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write, 782 timeout, cmd_flags); 783 784 /* start of retry loop */ 785 do { 786 struct request *rq; 787 int error; 788 789 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 790 791 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 792 rq->cmd_type = REQ_TYPE_ATA_PC; 793 rq->sense = sense; 794 rq->cmd_flags |= cmd_flags; 795 rq->timeout = timeout; 796 if (buffer) { 797 rq->data = buffer; 798 rq->data_len = *bufflen; 799 } 800 801 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 802 803 if (buffer) 804 *bufflen = rq->data_len; 805 806 flags = rq->cmd_flags; 807 blk_put_request(rq); 808 809 /* 810 * FIXME: we should probably abort/retry or something in case of 811 * failure. 812 */ 813 if (flags & REQ_FAILED) { 814 /* 815 * The request failed. Retry if it was due to a unit 816 * attention status (usually means media was changed). 817 */ 818 struct request_sense *reqbuf = sense; 819 820 if (reqbuf->sense_key == UNIT_ATTENTION) 821 cdrom_saw_media_change(drive); 822 else if (reqbuf->sense_key == NOT_READY && 823 reqbuf->asc == 4 && reqbuf->ascq != 4) { 824 /* 825 * The drive is in the process of loading 826 * a disk. Retry, but wait a little to give 827 * the drive time to complete the load. 828 */ 829 ssleep(2); 830 } else { 831 /* otherwise, don't retry */ 832 retries = 0; 833 } 834 --retries; 835 } 836 837 /* end of retry loop */ 838 } while ((flags & REQ_FAILED) && retries >= 0); 839 840 /* return an error if the command failed */ 841 return (flags & REQ_FAILED) ? -EIO : 0; 842} 843 844/* 845 * Called from blk_end_request_callback() after the data of the request is 846 * completed and before the request itself is completed. By returning value '1', 847 * blk_end_request_callback() returns immediately without completing it. 848 */ 849static int cdrom_newpc_intr_dummy_cb(struct request *rq) 850{ 851 return 1; 852} 853 854static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 855{ 856 ide_hwif_t *hwif = drive->hwif; 857 ide_hwgroup_t *hwgroup = hwif->hwgroup; 858 struct request *rq = hwgroup->rq; 859 xfer_func_t *xferfunc; 860 ide_expiry_t *expiry = NULL; 861 int dma_error = 0, dma, stat, thislen, uptodate = 0; 862 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 863 unsigned int timeout; 864 u16 len; 865 u8 ireason; 866 867 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n", 868 __func__, rq->cmd[0], write); 869 870 /* check for errors */ 871 dma = drive->dma; 872 if (dma) { 873 drive->dma = 0; 874 dma_error = hwif->dma_ops->dma_end(drive); 875 if (dma_error) { 876 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 877 write ? "write" : "read"); 878 ide_dma_off(drive); 879 } 880 } 881 882 if (cdrom_decode_status(drive, 0, &stat)) 883 return ide_stopped; 884 885 /* using dma, transfer is complete now */ 886 if (dma) { 887 if (dma_error) 888 return ide_error(drive, "dma error", stat); 889 if (blk_fs_request(rq)) { 890 ide_end_request(drive, 1, rq->nr_sectors); 891 return ide_stopped; 892 } 893 goto end_request; 894 } 895 896 ide_read_bcount_and_ireason(drive, &len, &ireason); 897 898 thislen = blk_fs_request(rq) ? len : rq->data_len; 899 if (thislen > len) 900 thislen = len; 901 902 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n", 903 __func__, stat, thislen); 904 905 /* If DRQ is clear, the command has completed. */ 906 if ((stat & ATA_DRQ) == 0) { 907 if (blk_fs_request(rq)) { 908 /* 909 * If we're not done reading/writing, complain. 910 * Otherwise, complete the command normally. 911 */ 912 uptodate = 1; 913 if (rq->current_nr_sectors > 0) { 914 printk(KERN_ERR PFX "%s: %s: data underrun " 915 "(%d blocks)\n", 916 drive->name, __func__, 917 rq->current_nr_sectors); 918 if (!write) 919 rq->cmd_flags |= REQ_FAILED; 920 uptodate = 0; 921 } 922 cdrom_end_request(drive, uptodate); 923 return ide_stopped; 924 } else if (!blk_pc_request(rq)) { 925 ide_cd_request_sense_fixup(drive, rq); 926 /* complain if we still have data left to transfer */ 927 uptodate = rq->data_len ? 0 : 1; 928 } 929 goto end_request; 930 } 931 932 /* check which way to transfer data */ 933 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 934 return ide_stopped; 935 936 if (blk_fs_request(rq)) { 937 if (write == 0) { 938 int nskip; 939 940 if (ide_cd_check_transfer_size(drive, len)) { 941 cdrom_end_request(drive, 0); 942 return ide_stopped; 943 } 944 945 /* 946 * First, figure out if we need to bit-bucket 947 * any of the leading sectors. 948 */ 949 nskip = min_t(int, rq->current_nr_sectors 950 - bio_cur_sectors(rq->bio), 951 thislen >> 9); 952 if (nskip > 0) { 953 ide_pad_transfer(drive, write, nskip << 9); 954 rq->current_nr_sectors -= nskip; 955 thislen -= (nskip << 9); 956 } 957 } 958 } 959 960 if (ireason == 0) { 961 write = 1; 962 xferfunc = hwif->tp_ops->output_data; 963 } else { 964 write = 0; 965 xferfunc = hwif->tp_ops->input_data; 966 } 967 968 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, " 969 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason); 970 971 /* transfer data */ 972 while (thislen > 0) { 973 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 974 int blen = rq->data_len; 975 976 /* bio backed? */ 977 if (rq->bio) { 978 if (blk_fs_request(rq)) { 979 ptr = rq->buffer; 980 blen = rq->current_nr_sectors << 9; 981 } else { 982 ptr = bio_data(rq->bio); 983 blen = bio_iovec(rq->bio)->bv_len; 984 } 985 } 986 987 if (!ptr) { 988 if (blk_fs_request(rq) && !write) 989 /* 990 * If the buffers are full, pipe the rest into 991 * oblivion. 992 */ 993 ide_pad_transfer(drive, 0, thislen); 994 else { 995 printk(KERN_ERR PFX "%s: confused, missing data\n", 996 drive->name); 997 blk_dump_rq_flags(rq, rq_data_dir(rq) 998 ? "cdrom_newpc_intr, write" 999 : "cdrom_newpc_intr, read"); 1000 } 1001 break; 1002 } 1003 1004 if (blen > thislen) 1005 blen = thislen; 1006 1007 xferfunc(drive, NULL, ptr, blen); 1008 1009 thislen -= blen; 1010 len -= blen; 1011 1012 if (blk_fs_request(rq)) { 1013 rq->buffer += blen; 1014 rq->nr_sectors -= (blen >> 9); 1015 rq->current_nr_sectors -= (blen >> 9); 1016 rq->sector += (blen >> 9); 1017 1018 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1019 cdrom_end_request(drive, 1); 1020 } else { 1021 rq->data_len -= blen; 1022 1023 /* 1024 * The request can't be completed until DRQ is cleared. 1025 * So complete the data, but don't complete the request 1026 * using the dummy function for the callback feature 1027 * of blk_end_request_callback(). 1028 */ 1029 if (rq->bio) 1030 blk_end_request_callback(rq, 0, blen, 1031 cdrom_newpc_intr_dummy_cb); 1032 else 1033 rq->data += blen; 1034 } 1035 if (!write && blk_sense_request(rq)) 1036 rq->sense_len += blen; 1037 } 1038 1039 /* pad, if necessary */ 1040 if (!blk_fs_request(rq) && len > 0) 1041 ide_pad_transfer(drive, write, len); 1042 1043 if (blk_pc_request(rq)) { 1044 timeout = rq->timeout; 1045 } else { 1046 timeout = ATAPI_WAIT_PC; 1047 if (!blk_fs_request(rq)) 1048 expiry = ide_cd_expiry; 1049 } 1050 1051 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1052 return ide_started; 1053 1054end_request: 1055 if (blk_pc_request(rq)) { 1056 unsigned int dlen = rq->data_len; 1057 1058 if (dma) 1059 rq->data_len = 0; 1060 1061 if (blk_end_request(rq, 0, dlen)) 1062 BUG(); 1063 1064 hwgroup->rq = NULL; 1065 } else { 1066 if (!uptodate) 1067 rq->cmd_flags |= REQ_FAILED; 1068 cdrom_end_request(drive, uptodate); 1069 } 1070 return ide_stopped; 1071} 1072 1073static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1074{ 1075 struct cdrom_info *cd = drive->driver_data; 1076 int write = rq_data_dir(rq) == WRITE; 1077 unsigned short sectors_per_frame = 1078 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1079 1080 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, " 1081 "secs_per_frame: %u\n", 1082 __func__, rq->cmd[0], write, sectors_per_frame); 1083 1084 if (write) { 1085 /* disk has become write protected */ 1086 if (get_disk_ro(cd->disk)) { 1087 cdrom_end_request(drive, 0); 1088 return ide_stopped; 1089 } 1090 } else { 1091 /* 1092 * We may be retrying this request after an error. Fix up any 1093 * weirdness which might be present in the request packet. 1094 */ 1095 ide_cd_restore_request(drive, rq); 1096 } 1097 1098 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1099 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1100 (rq->sector & (sectors_per_frame - 1))) { 1101 if (write) { 1102 cdrom_end_request(drive, 0); 1103 return ide_stopped; 1104 } 1105 drive->dma = 0; 1106 } else 1107 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1108 1109 if (write) 1110 cd->devinfo.media_written = 1; 1111 1112 return ide_started; 1113} 1114 1115static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1116{ 1117 1118 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, " 1119 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0], 1120 rq->cmd_type); 1121 1122 if (blk_pc_request(rq)) 1123 rq->cmd_flags |= REQ_QUIET; 1124 else 1125 rq->cmd_flags &= ~REQ_FAILED; 1126 1127 drive->dma = 0; 1128 1129 /* sg request */ 1130 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1131 struct request_queue *q = drive->queue; 1132 unsigned int alignment; 1133 char *buf; 1134 1135 if (rq->bio) 1136 buf = bio_data(rq->bio); 1137 else 1138 buf = rq->data; 1139 1140 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1141 1142 /* 1143 * check if dma is safe 1144 * 1145 * NOTE! The "len" and "addr" checks should possibly have 1146 * separate masks. 1147 */ 1148 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1149 if ((unsigned long)buf & alignment 1150 || rq->data_len & q->dma_pad_mask 1151 || object_is_on_stack(buf)) 1152 drive->dma = 0; 1153 } 1154} 1155 1156static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1157 sector_t block) 1158{ 1159 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, " 1160 "rq->cmd_type: 0x%x, block: %llu\n", 1161 __func__, rq->cmd[0], rq->cmd_type, 1162 (unsigned long long)block); 1163 1164 if (blk_fs_request(rq)) { 1165 if (cdrom_start_rw(drive, rq) == ide_stopped) 1166 return ide_stopped; 1167 1168 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1169 return ide_stopped; 1170 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1171 rq->cmd_type == REQ_TYPE_ATA_PC) { 1172 if (!rq->timeout) 1173 rq->timeout = ATAPI_WAIT_PC; 1174 1175 cdrom_do_block_pc(drive, rq); 1176 } else if (blk_special_request(rq)) { 1177 /* right now this can only be a reset... */ 1178 cdrom_end_request(drive, 1); 1179 return ide_stopped; 1180 } else { 1181 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1182 cdrom_end_request(drive, 0); 1183 return ide_stopped; 1184 } 1185 1186 return cdrom_start_packet_command(drive); 1187} 1188 1189/* 1190 * Ioctl handling. 1191 * 1192 * Routines which queue packet commands take as a final argument a pointer to a 1193 * request_sense struct. If execution of the command results in an error with a 1194 * CHECK CONDITION status, this structure will be filled with the results of the 1195 * subsequent request sense command. The pointer can also be NULL, in which case 1196 * no sense information is returned. 1197 */ 1198static void msf_from_bcd(struct atapi_msf *msf) 1199{ 1200 msf->minute = bcd2bin(msf->minute); 1201 msf->second = bcd2bin(msf->second); 1202 msf->frame = bcd2bin(msf->frame); 1203} 1204 1205int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1206{ 1207 struct cdrom_info *info = drive->driver_data; 1208 struct cdrom_device_info *cdi = &info->devinfo; 1209 unsigned char cmd[BLK_MAX_CDB]; 1210 1211 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1212 1213 memset(cmd, 0, BLK_MAX_CDB); 1214 cmd[0] = GPCMD_TEST_UNIT_READY; 1215 1216 /* 1217 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1218 * instead of supporting the LOAD_UNLOAD opcode. 1219 */ 1220 cmd[7] = cdi->sanyo_slot % 3; 1221 1222 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1223} 1224 1225static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1226 unsigned long *sectors_per_frame, 1227 struct request_sense *sense) 1228{ 1229 struct { 1230 __be32 lba; 1231 __be32 blocklen; 1232 } capbuf; 1233 1234 int stat; 1235 unsigned char cmd[BLK_MAX_CDB]; 1236 unsigned len = sizeof(capbuf); 1237 u32 blocklen; 1238 1239 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1240 1241 memset(cmd, 0, BLK_MAX_CDB); 1242 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1243 1244 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1245 REQ_QUIET); 1246 if (stat) 1247 return stat; 1248 1249 /* 1250 * Sanity check the given block size 1251 */ 1252 blocklen = be32_to_cpu(capbuf.blocklen); 1253 switch (blocklen) { 1254 case 512: 1255 case 1024: 1256 case 2048: 1257 case 4096: 1258 break; 1259 default: 1260 printk(KERN_ERR PFX "%s: weird block size %u\n", 1261 drive->name, blocklen); 1262 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1263 drive->name); 1264 blocklen = 2048; 1265 break; 1266 } 1267 1268 *capacity = 1 + be32_to_cpu(capbuf.lba); 1269 *sectors_per_frame = blocklen >> SECTOR_BITS; 1270 1271 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n", 1272 __func__, *capacity, *sectors_per_frame); 1273 1274 return 0; 1275} 1276 1277static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1278 int format, char *buf, int buflen, 1279 struct request_sense *sense) 1280{ 1281 unsigned char cmd[BLK_MAX_CDB]; 1282 1283 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1284 1285 memset(cmd, 0, BLK_MAX_CDB); 1286 1287 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1288 cmd[6] = trackno; 1289 cmd[7] = (buflen >> 8); 1290 cmd[8] = (buflen & 0xff); 1291 cmd[9] = (format << 6); 1292 1293 if (msf_flag) 1294 cmd[1] = 2; 1295 1296 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1297} 1298 1299/* Try to read the entire TOC for the disk into our internal buffer. */ 1300int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1301{ 1302 int stat, ntracks, i; 1303 struct cdrom_info *info = drive->driver_data; 1304 struct cdrom_device_info *cdi = &info->devinfo; 1305 struct atapi_toc *toc = info->toc; 1306 struct { 1307 struct atapi_toc_header hdr; 1308 struct atapi_toc_entry ent; 1309 } ms_tmp; 1310 long last_written; 1311 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1312 1313 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1314 1315 if (toc == NULL) { 1316 /* try to allocate space */ 1317 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1318 if (toc == NULL) { 1319 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1320 drive->name); 1321 return -ENOMEM; 1322 } 1323 info->toc = toc; 1324 } 1325 1326 /* 1327 * Check to see if the existing data is still valid. If it is, 1328 * just return. 1329 */ 1330 (void) cdrom_check_status(drive, sense); 1331 1332 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1333 return 0; 1334 1335 /* try to get the total cdrom capacity and sector size */ 1336 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1337 sense); 1338 if (stat) 1339 toc->capacity = 0x1fffff; 1340 1341 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1342 /* save a private copy of the TOC capacity for error handling */ 1343 drive->probed_capacity = toc->capacity * sectors_per_frame; 1344 1345 blk_queue_hardsect_size(drive->queue, 1346 sectors_per_frame << SECTOR_BITS); 1347 1348 /* first read just the header, so we know how long the TOC is */ 1349 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1350 sizeof(struct atapi_toc_header), sense); 1351 if (stat) 1352 return stat; 1353 1354 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1355 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1356 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1357 } 1358 1359 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1360 if (ntracks <= 0) 1361 return -EIO; 1362 if (ntracks > MAX_TRACKS) 1363 ntracks = MAX_TRACKS; 1364 1365 /* now read the whole schmeer */ 1366 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1367 (char *)&toc->hdr, 1368 sizeof(struct atapi_toc_header) + 1369 (ntracks + 1) * 1370 sizeof(struct atapi_toc_entry), sense); 1371 1372 if (stat && toc->hdr.first_track > 1) { 1373 /* 1374 * Cds with CDI tracks only don't have any TOC entries, despite 1375 * of this the returned values are 1376 * first_track == last_track = number of CDI tracks + 1, 1377 * so that this case is indistinguishable from the same layout 1378 * plus an additional audio track. If we get an error for the 1379 * regular case, we assume a CDI without additional audio 1380 * tracks. In this case the readable TOC is empty (CDI tracks 1381 * are not included) and only holds the Leadout entry. 1382 * 1383 * Heiko Eißfeldt. 1384 */ 1385 ntracks = 0; 1386 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1387 (char *)&toc->hdr, 1388 sizeof(struct atapi_toc_header) + 1389 (ntracks + 1) * 1390 sizeof(struct atapi_toc_entry), 1391 sense); 1392 if (stat) 1393 return stat; 1394 1395 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1396 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1397 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1398 } else { 1399 toc->hdr.first_track = CDROM_LEADOUT; 1400 toc->hdr.last_track = CDROM_LEADOUT; 1401 } 1402 } 1403 1404 if (stat) 1405 return stat; 1406 1407 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1408 1409 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1410 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1411 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1412 } 1413 1414 for (i = 0; i <= ntracks; i++) { 1415 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1416 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1417 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1418 msf_from_bcd(&toc->ent[i].addr.msf); 1419 } 1420 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1421 toc->ent[i].addr.msf.second, 1422 toc->ent[i].addr.msf.frame); 1423 } 1424 1425 if (toc->hdr.first_track != CDROM_LEADOUT) { 1426 /* read the multisession information */ 1427 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1428 sizeof(ms_tmp), sense); 1429 if (stat) 1430 return stat; 1431 1432 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1433 } else { 1434 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1435 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1436 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1437 } 1438 1439 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1440 /* re-read multisession information using MSF format */ 1441 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1442 sizeof(ms_tmp), sense); 1443 if (stat) 1444 return stat; 1445 1446 msf_from_bcd(&ms_tmp.ent.addr.msf); 1447 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1448 ms_tmp.ent.addr.msf.second, 1449 ms_tmp.ent.addr.msf.frame); 1450 } 1451 1452 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1453 1454 /* now try to get the total cdrom capacity */ 1455 stat = cdrom_get_last_written(cdi, &last_written); 1456 if (!stat && (last_written > toc->capacity)) { 1457 toc->capacity = last_written; 1458 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1459 drive->probed_capacity = toc->capacity * sectors_per_frame; 1460 } 1461 1462 /* Remember that we've read this stuff. */ 1463 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1464 1465 return 0; 1466} 1467 1468int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1469{ 1470 struct cdrom_info *info = drive->driver_data; 1471 struct cdrom_device_info *cdi = &info->devinfo; 1472 struct packet_command cgc; 1473 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1474 1475 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1476 1477 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1478 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1479 1480 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1481 do { 1482 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1483 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1484 if (!stat) 1485 break; 1486 } while (--attempts); 1487 return stat; 1488} 1489 1490void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1491{ 1492 struct cdrom_info *cd = drive->driver_data; 1493 u16 curspeed, maxspeed; 1494 1495 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1496 1497 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1498 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1499 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1500 } else { 1501 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1502 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1503 } 1504 1505 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n", 1506 __func__, curspeed, maxspeed); 1507 1508 cd->current_speed = (curspeed + (176/2)) / 176; 1509 cd->max_speed = (maxspeed + (176/2)) / 176; 1510} 1511 1512#define IDE_CD_CAPABILITIES \ 1513 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1514 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1515 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1516 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1517 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1518 1519static struct cdrom_device_ops ide_cdrom_dops = { 1520 .open = ide_cdrom_open_real, 1521 .release = ide_cdrom_release_real, 1522 .drive_status = ide_cdrom_drive_status, 1523 .media_changed = ide_cdrom_check_media_change_real, 1524 .tray_move = ide_cdrom_tray_move, 1525 .lock_door = ide_cdrom_lock_door, 1526 .select_speed = ide_cdrom_select_speed, 1527 .get_last_session = ide_cdrom_get_last_session, 1528 .get_mcn = ide_cdrom_get_mcn, 1529 .reset = ide_cdrom_reset, 1530 .audio_ioctl = ide_cdrom_audio_ioctl, 1531 .capability = IDE_CD_CAPABILITIES, 1532 .generic_packet = ide_cdrom_packet, 1533}; 1534 1535static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1536{ 1537 struct cdrom_info *info = drive->driver_data; 1538 struct cdrom_device_info *devinfo = &info->devinfo; 1539 1540 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots); 1541 1542 devinfo->ops = &ide_cdrom_dops; 1543 devinfo->speed = info->current_speed; 1544 devinfo->capacity = nslots; 1545 devinfo->handle = drive; 1546 strcpy(devinfo->name, drive->name); 1547 1548 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1549 devinfo->mask |= CDC_SELECT_SPEED; 1550 1551 devinfo->disk = info->disk; 1552 return register_cdrom(devinfo); 1553} 1554 1555static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1556{ 1557 struct cdrom_info *cd = drive->driver_data; 1558 struct cdrom_device_info *cdi = &cd->devinfo; 1559 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1560 mechtype_t mechtype; 1561 int nslots = 1; 1562 1563 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, " 1564 "drive->atapi_flags: 0x%lx\n", __func__, drive->media, 1565 drive->atapi_flags); 1566 1567 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1568 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1569 CDC_MO_DRIVE | CDC_RAM); 1570 1571 if (drive->media == ide_optical) { 1572 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1573 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1574 drive->name); 1575 return nslots; 1576 } 1577 1578 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1579 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1580 cdi->mask &= ~CDC_PLAY_AUDIO; 1581 return nslots; 1582 } 1583 1584 /* 1585 * We have to cheat a little here. the packet will eventually be queued 1586 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1587 * Since this device hasn't been registered with the Uniform layer yet, 1588 * it can't do this. Same goes for cdi->ops. 1589 */ 1590 cdi->handle = drive; 1591 cdi->ops = &ide_cdrom_dops; 1592 1593 if (ide_cdrom_get_capabilities(drive, buf)) 1594 return 0; 1595 1596 if ((buf[8 + 6] & 0x01) == 0) 1597 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1598 if (buf[8 + 6] & 0x08) 1599 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1600 if (buf[8 + 3] & 0x01) 1601 cdi->mask &= ~CDC_CD_R; 1602 if (buf[8 + 3] & 0x02) 1603 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1604 if (buf[8 + 2] & 0x38) 1605 cdi->mask &= ~CDC_DVD; 1606 if (buf[8 + 3] & 0x20) 1607 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1608 if (buf[8 + 3] & 0x10) 1609 cdi->mask &= ~CDC_DVD_R; 1610 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1611 cdi->mask &= ~CDC_PLAY_AUDIO; 1612 1613 mechtype = buf[8 + 6] >> 5; 1614 if (mechtype == mechtype_caddy || 1615 mechtype == mechtype_popup || 1616 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1617 cdi->mask |= CDC_CLOSE_TRAY; 1618 1619 if (cdi->sanyo_slot > 0) { 1620 cdi->mask &= ~CDC_SELECT_DISC; 1621 nslots = 3; 1622 } else if (mechtype == mechtype_individual_changer || 1623 mechtype == mechtype_cartridge_changer) { 1624 nslots = cdrom_number_of_slots(cdi); 1625 if (nslots > 1) 1626 cdi->mask &= ~CDC_SELECT_DISC; 1627 } 1628 1629 ide_cdrom_update_speed(drive, buf); 1630 1631 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1632 1633 /* don't print speed if the drive reported 0 */ 1634 if (cd->max_speed) 1635 printk(KERN_CONT " %dX", cd->max_speed); 1636 1637 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1638 1639 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1640 printk(KERN_CONT " DVD%s%s", 1641 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1642 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1643 1644 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1645 printk(KERN_CONT " CD%s%s", 1646 (cdi->mask & CDC_CD_R) ? "" : "-R", 1647 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1648 1649 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1650 printk(KERN_CONT " changer w/%d slots", nslots); 1651 else 1652 printk(KERN_CONT " drive"); 1653 1654 printk(KERN_CONT ", %dkB Cache\n", 1655 be16_to_cpup((__be16 *)&buf[8 + 12])); 1656 1657 return nslots; 1658} 1659 1660/* standard prep_rq_fn that builds 10 byte cmds */ 1661static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1662{ 1663 int hard_sect = queue_hardsect_size(q); 1664 long block = (long)rq->hard_sector / (hard_sect >> 9); 1665 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1666 1667 memset(rq->cmd, 0, BLK_MAX_CDB); 1668 1669 if (rq_data_dir(rq) == READ) 1670 rq->cmd[0] = GPCMD_READ_10; 1671 else 1672 rq->cmd[0] = GPCMD_WRITE_10; 1673 1674 /* 1675 * fill in lba 1676 */ 1677 rq->cmd[2] = (block >> 24) & 0xff; 1678 rq->cmd[3] = (block >> 16) & 0xff; 1679 rq->cmd[4] = (block >> 8) & 0xff; 1680 rq->cmd[5] = block & 0xff; 1681 1682 /* 1683 * and transfer length 1684 */ 1685 rq->cmd[7] = (blocks >> 8) & 0xff; 1686 rq->cmd[8] = blocks & 0xff; 1687 rq->cmd_len = 10; 1688 return BLKPREP_OK; 1689} 1690 1691/* 1692 * Most of the SCSI commands are supported directly by ATAPI devices. 1693 * This transform handles the few exceptions. 1694 */ 1695static int ide_cdrom_prep_pc(struct request *rq) 1696{ 1697 u8 *c = rq->cmd; 1698 1699 /* transform 6-byte read/write commands to the 10-byte version */ 1700 if (c[0] == READ_6 || c[0] == WRITE_6) { 1701 c[8] = c[4]; 1702 c[5] = c[3]; 1703 c[4] = c[2]; 1704 c[3] = c[1] & 0x1f; 1705 c[2] = 0; 1706 c[1] &= 0xe0; 1707 c[0] += (READ_10 - READ_6); 1708 rq->cmd_len = 10; 1709 return BLKPREP_OK; 1710 } 1711 1712 /* 1713 * it's silly to pretend we understand 6-byte sense commands, just 1714 * reject with ILLEGAL_REQUEST and the caller should take the 1715 * appropriate action 1716 */ 1717 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1718 rq->errors = ILLEGAL_REQUEST; 1719 return BLKPREP_KILL; 1720 } 1721 1722 return BLKPREP_OK; 1723} 1724 1725static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1726{ 1727 if (blk_fs_request(rq)) 1728 return ide_cdrom_prep_fs(q, rq); 1729 else if (blk_pc_request(rq)) 1730 return ide_cdrom_prep_pc(rq); 1731 1732 return 0; 1733} 1734 1735struct cd_list_entry { 1736 const char *id_model; 1737 const char *id_firmware; 1738 unsigned int cd_flags; 1739}; 1740 1741#ifdef CONFIG_IDE_PROC_FS 1742static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1743{ 1744 unsigned long capacity, sectors_per_frame; 1745 1746 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1747 return 0; 1748 1749 return capacity * sectors_per_frame; 1750} 1751 1752static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1753 int count, int *eof, void *data) 1754{ 1755 ide_drive_t *drive = data; 1756 int len; 1757 1758 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1759 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1760} 1761 1762static ide_proc_entry_t idecd_proc[] = { 1763 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1764 { NULL, 0, NULL, NULL } 1765}; 1766 1767static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1768{ 1769 return idecd_proc; 1770} 1771 1772static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1773{ 1774 return NULL; 1775} 1776#endif 1777 1778static const struct cd_list_entry ide_cd_quirks_list[] = { 1779 /* Limit transfer size per interrupt. */ 1780 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1781 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1782 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1783 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1784 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1785 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1786 IDE_AFLAG_PRE_ATAPI12, }, 1787 /* Vertos 300, some versions of this drive like to talk BCD. */ 1788 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1789 /* Vertos 600 ESD. */ 1790 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1791 /* 1792 * Sanyo 3 CD changer uses a non-standard command for CD changing 1793 * (by default standard ATAPI support for CD changers is used). 1794 */ 1795 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1796 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1797 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1798 /* Stingray 8X CD-ROM. */ 1799 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1800 /* 1801 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1802 * mode sense page capabilities size, but older drives break. 1803 */ 1804 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1805 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1806 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1807 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1808 /* 1809 * Some drives used by Apple don't advertise audio play 1810 * but they do support reading TOC & audio datas. 1811 */ 1812 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1813 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1814 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1815 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1816 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1817 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1818 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1819 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1820 { NULL, NULL, 0 } 1821}; 1822 1823static unsigned int ide_cd_flags(u16 *id) 1824{ 1825 const struct cd_list_entry *cle = ide_cd_quirks_list; 1826 1827 while (cle->id_model) { 1828 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1829 (cle->id_firmware == NULL || 1830 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1831 return cle->cd_flags; 1832 cle++; 1833 } 1834 1835 return 0; 1836} 1837 1838static int ide_cdrom_setup(ide_drive_t *drive) 1839{ 1840 struct cdrom_info *cd = drive->driver_data; 1841 struct cdrom_device_info *cdi = &cd->devinfo; 1842 u16 *id = drive->id; 1843 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1844 int nslots; 1845 1846 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__); 1847 1848 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1849 blk_queue_dma_alignment(drive->queue, 31); 1850 blk_queue_update_dma_pad(drive->queue, 15); 1851 drive->queue->unplug_delay = (1 * HZ) / 1000; 1852 if (!drive->queue->unplug_delay) 1853 drive->queue->unplug_delay = 1; 1854 1855 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1856 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1857 1858 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1859 fw_rev[4] == '1' && fw_rev[6] <= '2') 1860 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1861 IDE_AFLAG_TOCADDR_AS_BCD); 1862 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1863 fw_rev[4] == '1' && fw_rev[6] <= '2') 1864 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1865 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1866 /* 3 => use CD in slot 0 */ 1867 cdi->sanyo_slot = 3; 1868 1869 nslots = ide_cdrom_probe_capabilities(drive); 1870 1871 /* set correct block size */ 1872 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1873 1874 if (ide_cdrom_register(drive, nslots)) { 1875 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1876 " cdrom driver.\n", drive->name, __func__); 1877 cd->devinfo.handle = NULL; 1878 return 1; 1879 } 1880 1881 ide_proc_register_driver(drive, cd->driver); 1882 return 0; 1883} 1884 1885static void ide_cd_remove(ide_drive_t *drive) 1886{ 1887 struct cdrom_info *info = drive->driver_data; 1888 1889 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1890 1891 ide_proc_unregister_driver(drive, info->driver); 1892 1893 del_gendisk(info->disk); 1894 1895 ide_cd_put(info); 1896} 1897 1898static void ide_cd_release(struct kref *kref) 1899{ 1900 struct cdrom_info *info = to_ide_drv(kref, cdrom_info); 1901 struct cdrom_device_info *devinfo = &info->devinfo; 1902 ide_drive_t *drive = info->drive; 1903 struct gendisk *g = info->disk; 1904 1905 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1906 1907 kfree(info->toc); 1908 if (devinfo->handle == drive) 1909 unregister_cdrom(devinfo); 1910 drive->driver_data = NULL; 1911 blk_queue_prep_rq(drive->queue, NULL); 1912 g->private_data = NULL; 1913 put_disk(g); 1914 kfree(info); 1915} 1916 1917static int ide_cd_probe(ide_drive_t *); 1918 1919static ide_driver_t ide_cdrom_driver = { 1920 .gen_driver = { 1921 .owner = THIS_MODULE, 1922 .name = "ide-cdrom", 1923 .bus = &ide_bus_type, 1924 }, 1925 .probe = ide_cd_probe, 1926 .remove = ide_cd_remove, 1927 .version = IDECD_VERSION, 1928 .do_request = ide_cd_do_request, 1929 .end_request = ide_end_request, 1930 .error = __ide_error, 1931#ifdef CONFIG_IDE_PROC_FS 1932 .proc_entries = ide_cd_proc_entries, 1933 .proc_devsets = ide_cd_proc_devsets, 1934#endif 1935}; 1936 1937static int idecd_open(struct block_device *bdev, fmode_t mode) 1938{ 1939 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1940 int rc = -ENOMEM; 1941 1942 if (!info) 1943 return -ENXIO; 1944 1945 rc = cdrom_open(&info->devinfo, bdev, mode); 1946 1947 if (rc < 0) 1948 ide_cd_put(info); 1949 1950 return rc; 1951} 1952 1953static int idecd_release(struct gendisk *disk, fmode_t mode) 1954{ 1955 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1956 1957 cdrom_release(&info->devinfo, mode); 1958 1959 ide_cd_put(info); 1960 1961 return 0; 1962} 1963 1964static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1965{ 1966 struct packet_command cgc; 1967 char buffer[16]; 1968 int stat; 1969 char spindown; 1970 1971 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1972 return -EFAULT; 1973 1974 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1975 1976 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1977 if (stat) 1978 return stat; 1979 1980 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1981 return cdrom_mode_select(cdi, &cgc); 1982} 1983 1984static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1985{ 1986 struct packet_command cgc; 1987 char buffer[16]; 1988 int stat; 1989 char spindown; 1990 1991 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1992 1993 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1994 if (stat) 1995 return stat; 1996 1997 spindown = buffer[11] & 0x0f; 1998 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1999 return -EFAULT; 2000 return 0; 2001} 2002 2003static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 2004 unsigned int cmd, unsigned long arg) 2005{ 2006 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 2007 int err; 2008 2009 switch (cmd) { 2010 case CDROMSETSPINDOWN: 2011 return idecd_set_spindown(&info->devinfo, arg); 2012 case CDROMGETSPINDOWN: 2013 return idecd_get_spindown(&info->devinfo, arg); 2014 default: 2015 break; 2016 } 2017 2018 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 2019 if (err == -EINVAL) 2020 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 2021 2022 return err; 2023} 2024 2025static int idecd_media_changed(struct gendisk *disk) 2026{ 2027 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2028 return cdrom_media_changed(&info->devinfo); 2029} 2030 2031static int idecd_revalidate_disk(struct gendisk *disk) 2032{ 2033 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2034 struct request_sense sense; 2035 2036 ide_cd_read_toc(info->drive, &sense); 2037 2038 return 0; 2039} 2040 2041static struct block_device_operations idecd_ops = { 2042 .owner = THIS_MODULE, 2043 .open = idecd_open, 2044 .release = idecd_release, 2045 .locked_ioctl = idecd_ioctl, 2046 .media_changed = idecd_media_changed, 2047 .revalidate_disk = idecd_revalidate_disk 2048}; 2049 2050/* module options */ 2051static char *ignore; 2052module_param(ignore, charp, 0400); 2053 2054static unsigned long debug_mask; 2055module_param(debug_mask, ulong, 0644); 2056 2057MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2058 2059static int ide_cd_probe(ide_drive_t *drive) 2060{ 2061 struct cdrom_info *info; 2062 struct gendisk *g; 2063 struct request_sense sense; 2064 2065 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, " 2066 "drive->media: 0x%x\n", __func__, drive->driver_req, 2067 drive->media); 2068 2069 if (!strstr("ide-cdrom", drive->driver_req)) 2070 goto failed; 2071 2072 if (drive->media != ide_cdrom && drive->media != ide_optical) 2073 goto failed; 2074 2075 /* skip drives that we were told to ignore */ 2076 if (ignore != NULL) { 2077 if (strstr(ignore, drive->name)) { 2078 printk(KERN_INFO PFX "ignoring drive %s\n", 2079 drive->name); 2080 goto failed; 2081 } 2082 } 2083 2084 drive->debug_mask = debug_mask; 2085 2086 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2087 if (info == NULL) { 2088 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 2089 drive->name); 2090 goto failed; 2091 } 2092 2093 g = alloc_disk(1 << PARTN_BITS); 2094 if (!g) 2095 goto out_free_cd; 2096 2097 ide_init_disk(g, drive); 2098 2099 kref_init(&info->kref); 2100 2101 info->drive = drive; 2102 info->driver = &ide_cdrom_driver; 2103 info->disk = g; 2104 2105 g->private_data = &info->driver; 2106 2107 drive->driver_data = info; 2108 2109 g->minors = 1; 2110 g->driverfs_dev = &drive->gendev; 2111 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2112 if (ide_cdrom_setup(drive)) { 2113 ide_cd_release(&info->kref); 2114 goto failed; 2115 } 2116 2117 ide_cd_read_toc(drive, &sense); 2118 g->fops = &idecd_ops; 2119 g->flags |= GENHD_FL_REMOVABLE; 2120 add_disk(g); 2121 return 0; 2122 2123out_free_cd: 2124 kfree(info); 2125failed: 2126 return -ENODEV; 2127} 2128 2129static void __exit ide_cdrom_exit(void) 2130{ 2131 driver_unregister(&ide_cdrom_driver.gen_driver); 2132} 2133 2134static int __init ide_cdrom_init(void) 2135{ 2136 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2137 return driver_register(&ide_cdrom_driver.gen_driver); 2138} 2139 2140MODULE_ALIAS("ide:*m-cdrom*"); 2141MODULE_ALIAS("ide-cd"); 2142module_init(ide_cdrom_init); 2143module_exit(ide_cdrom_exit); 2144MODULE_LICENSE("GPL"); 2145