ide-cd.c revision 08243ba731ee08ff42cf1589379c81567690218f
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 56#define IDECD_DEBUG_LOG 1 57 58#if IDECD_DEBUG_LOG 59#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args) 60#else 61#define ide_debug_log(lvl, fmt, args...) do {} while (0) 62#endif 63 64static DEFINE_MUTEX(idecd_ref_mutex); 65 66static void ide_cd_release(struct kref *); 67 68static struct cdrom_info *ide_cd_get(struct gendisk *disk) 69{ 70 struct cdrom_info *cd = NULL; 71 72 mutex_lock(&idecd_ref_mutex); 73 cd = ide_drv_g(disk, cdrom_info); 74 if (cd) { 75 if (ide_device_get(cd->drive)) 76 cd = NULL; 77 else 78 kref_get(&cd->kref); 79 80 } 81 mutex_unlock(&idecd_ref_mutex); 82 return cd; 83} 84 85static void ide_cd_put(struct cdrom_info *cd) 86{ 87 ide_drive_t *drive = cd->drive; 88 89 mutex_lock(&idecd_ref_mutex); 90 kref_put(&cd->kref, ide_cd_release); 91 ide_device_put(drive); 92 mutex_unlock(&idecd_ref_mutex); 93} 94 95/* 96 * Generic packet command support and error handling routines. 97 */ 98 99/* Mark that we've seen a media change and invalidate our internal buffers. */ 100static void cdrom_saw_media_change(ide_drive_t *drive) 101{ 102 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; 103 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 104} 105 106static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 107 struct request_sense *sense) 108{ 109 int log = 0; 110 111 ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__, 112 sense->sense_key); 113 114 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 115 return 0; 116 117 switch (sense->sense_key) { 118 case NO_SENSE: 119 case RECOVERED_ERROR: 120 break; 121 case NOT_READY: 122 /* 123 * don't care about tray state messages for e.g. capacity 124 * commands or in-progress or becoming ready 125 */ 126 if (sense->asc == 0x3a || sense->asc == 0x04) 127 break; 128 log = 1; 129 break; 130 case ILLEGAL_REQUEST: 131 /* 132 * don't log START_STOP unit with LoEj set, since we cannot 133 * reliably check if drive can auto-close 134 */ 135 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 136 break; 137 log = 1; 138 break; 139 case UNIT_ATTENTION: 140 /* 141 * Make good and sure we've seen this potential media change. 142 * Some drives (i.e. Creative) fail to present the correct sense 143 * key in the error register. 144 */ 145 cdrom_saw_media_change(drive); 146 break; 147 default: 148 log = 1; 149 break; 150 } 151 return log; 152} 153 154static void cdrom_analyze_sense_data(ide_drive_t *drive, 155 struct request *failed_command, 156 struct request_sense *sense) 157{ 158 unsigned long sector; 159 unsigned long bio_sectors; 160 struct cdrom_info *info = drive->driver_data; 161 162 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, " 163 "sense_key: 0x%x\n", __func__, sense->error_code, 164 sense->sense_key); 165 166 if (failed_command) 167 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n", 168 __func__, failed_command->cmd[0]); 169 170 if (!cdrom_log_sense(drive, failed_command, sense)) 171 return; 172 173 /* 174 * If a read toc is executed for a CD-R or CD-RW medium where the first 175 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 176 * confusing error) 177 */ 178 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 179 if (sense->sense_key == 0x05 && sense->asc == 0x24) 180 return; 181 182 /* current error */ 183 if (sense->error_code == 0x70) { 184 switch (sense->sense_key) { 185 case MEDIUM_ERROR: 186 case VOLUME_OVERFLOW: 187 case ILLEGAL_REQUEST: 188 if (!sense->valid) 189 break; 190 if (failed_command == NULL || 191 !blk_fs_request(failed_command)) 192 break; 193 sector = (sense->information[0] << 24) | 194 (sense->information[1] << 16) | 195 (sense->information[2] << 8) | 196 (sense->information[3]); 197 198 if (drive->queue->hardsect_size == 2048) 199 /* device sector size is 2K */ 200 sector <<= 2; 201 202 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 203 sector &= ~(bio_sectors - 1); 204 205 if (sector < get_capacity(info->disk) && 206 drive->probed_capacity - sector < 4 * 75) 207 set_capacity(info->disk, sector); 208 } 209 } 210 211 ide_cd_log_error(drive->name, failed_command, sense); 212} 213 214static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 215 struct request *failed_command) 216{ 217 struct cdrom_info *info = drive->driver_data; 218 struct request *rq = &info->request_sense_request; 219 220 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__); 221 222 if (sense == NULL) 223 sense = &info->sense_data; 224 225 /* stuff the sense request in front of our current request */ 226 blk_rq_init(NULL, rq); 227 rq->cmd_type = REQ_TYPE_ATA_PC; 228 rq->rq_disk = info->disk; 229 230 rq->data = sense; 231 rq->cmd[0] = GPCMD_REQUEST_SENSE; 232 rq->cmd[4] = 18; 233 rq->data_len = 18; 234 235 rq->cmd_type = REQ_TYPE_SENSE; 236 rq->cmd_flags |= REQ_PREEMPT; 237 238 /* NOTE! Save the failed command in "rq->buffer" */ 239 rq->buffer = (void *) failed_command; 240 241 if (failed_command) 242 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n", 243 failed_command->cmd[0]); 244 245 ide_do_drive_cmd(drive, rq); 246} 247 248static void cdrom_end_request(ide_drive_t *drive, int uptodate) 249{ 250 struct request *rq = HWGROUP(drive)->rq; 251 int nsectors = rq->hard_cur_sectors; 252 253 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, " 254 "nsectors: %d\n", __func__, rq->cmd[0], uptodate, 255 nsectors); 256 257 if (blk_sense_request(rq) && uptodate) { 258 /* 259 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 260 * failed request 261 */ 262 struct request *failed = (struct request *) rq->buffer; 263 struct cdrom_info *info = drive->driver_data; 264 void *sense = &info->sense_data; 265 unsigned long flags; 266 267 if (failed) { 268 if (failed->sense) { 269 sense = failed->sense; 270 failed->sense_len = rq->sense_len; 271 } 272 cdrom_analyze_sense_data(drive, failed, sense); 273 /* 274 * now end the failed request 275 */ 276 if (blk_fs_request(failed)) { 277 if (ide_end_dequeued_request(drive, failed, 0, 278 failed->hard_nr_sectors)) 279 BUG(); 280 } else { 281 spin_lock_irqsave(&ide_lock, flags); 282 if (__blk_end_request(failed, -EIO, 283 failed->data_len)) 284 BUG(); 285 spin_unlock_irqrestore(&ide_lock, flags); 286 } 287 } else 288 cdrom_analyze_sense_data(drive, NULL, sense); 289 } 290 291 if (!rq->current_nr_sectors && blk_fs_request(rq)) 292 uptodate = 1; 293 /* make sure it's fully ended */ 294 if (blk_pc_request(rq)) 295 nsectors = (rq->data_len + 511) >> 9; 296 if (!nsectors) 297 nsectors = 1; 298 299 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n", 300 __func__, uptodate, nsectors); 301 302 ide_end_request(drive, uptodate, nsectors); 303} 304 305static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 306{ 307 if (st & 0x80) 308 return; 309 ide_dump_status(drive, msg, st); 310} 311 312/* 313 * Returns: 314 * 0: if the request should be continued. 315 * 1: if the request was ended. 316 */ 317static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 318{ 319 ide_hwif_t *hwif = drive->hwif; 320 struct request *rq = hwif->hwgroup->rq; 321 int stat, err, sense_key; 322 323 /* check for errors */ 324 stat = hwif->tp_ops->read_status(hwif); 325 326 if (stat_ret) 327 *stat_ret = stat; 328 329 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 330 return 0; 331 332 /* get the IDE error register */ 333 err = ide_read_error(drive); 334 sense_key = err >> 4; 335 336 if (rq == NULL) { 337 printk(KERN_ERR PFX "%s: missing rq in %s\n", 338 drive->name, __func__); 339 return 1; 340 } 341 342 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, " 343 "rq->cmd_type: 0x%x, err: 0x%x\n", __func__, stat, 344 good_stat, rq->cmd_type, err); 345 346 if (blk_sense_request(rq)) { 347 /* 348 * We got an error trying to get sense info from the drive 349 * (probably while trying to recover from a former error). 350 * Just give up. 351 */ 352 rq->cmd_flags |= REQ_FAILED; 353 cdrom_end_request(drive, 0); 354 ide_error(drive, "request sense failure", stat); 355 return 1; 356 357 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 358 /* All other functions, except for READ. */ 359 360 /* 361 * if we have an error, pass back CHECK_CONDITION as the 362 * scsi status byte 363 */ 364 if (blk_pc_request(rq) && !rq->errors) 365 rq->errors = SAM_STAT_CHECK_CONDITION; 366 367 /* check for tray open */ 368 if (sense_key == NOT_READY) { 369 cdrom_saw_media_change(drive); 370 } else if (sense_key == UNIT_ATTENTION) { 371 /* check for media change */ 372 cdrom_saw_media_change(drive); 373 return 0; 374 } else if (sense_key == ILLEGAL_REQUEST && 375 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 376 /* 377 * Don't print error message for this condition-- 378 * SFF8090i indicates that 5/24/00 is the correct 379 * response to a request to close the tray if the 380 * drive doesn't have that capability. 381 * cdrom_log_sense() knows this! 382 */ 383 } else if (!(rq->cmd_flags & REQ_QUIET)) { 384 /* otherwise, print an error */ 385 ide_dump_status(drive, "packet command error", stat); 386 } 387 388 rq->cmd_flags |= REQ_FAILED; 389 390 /* 391 * instead of playing games with moving completions around, 392 * remove failed request completely and end it when the 393 * request sense has completed 394 */ 395 goto end_request; 396 397 } else if (blk_fs_request(rq)) { 398 int do_end_request = 0; 399 400 /* handle errors from READ and WRITE requests */ 401 402 if (blk_noretry_request(rq)) 403 do_end_request = 1; 404 405 if (sense_key == NOT_READY) { 406 /* tray open */ 407 if (rq_data_dir(rq) == READ) { 408 cdrom_saw_media_change(drive); 409 410 /* fail the request */ 411 printk(KERN_ERR PFX "%s: tray open\n", 412 drive->name); 413 do_end_request = 1; 414 } else { 415 struct cdrom_info *info = drive->driver_data; 416 417 /* 418 * Allow the drive 5 seconds to recover, some 419 * devices will return this error while flushing 420 * data from cache. 421 */ 422 if (!rq->errors) 423 info->write_timeout = jiffies + 424 ATAPI_WAIT_WRITE_BUSY; 425 rq->errors = 1; 426 if (time_after(jiffies, info->write_timeout)) 427 do_end_request = 1; 428 else { 429 unsigned long flags; 430 431 /* 432 * take a breather relying on the unplug 433 * timer to kick us again 434 */ 435 spin_lock_irqsave(&ide_lock, flags); 436 blk_plug_device(drive->queue); 437 spin_unlock_irqrestore(&ide_lock, 438 flags); 439 return 1; 440 } 441 } 442 } else if (sense_key == UNIT_ATTENTION) { 443 /* media change */ 444 cdrom_saw_media_change(drive); 445 446 /* 447 * Arrange to retry the request but be sure to give up 448 * if we've retried too many times. 449 */ 450 if (++rq->errors > ERROR_MAX) 451 do_end_request = 1; 452 } else if (sense_key == ILLEGAL_REQUEST || 453 sense_key == DATA_PROTECT) { 454 /* 455 * No point in retrying after an illegal request or data 456 * protect error. 457 */ 458 ide_dump_status_no_sense(drive, "command error", stat); 459 do_end_request = 1; 460 } else if (sense_key == MEDIUM_ERROR) { 461 /* 462 * No point in re-trying a zillion times on a bad 463 * sector. If we got here the error is not correctable. 464 */ 465 ide_dump_status_no_sense(drive, 466 "media error (bad sector)", 467 stat); 468 do_end_request = 1; 469 } else if (sense_key == BLANK_CHECK) { 470 /* disk appears blank ?? */ 471 ide_dump_status_no_sense(drive, "media error (blank)", 472 stat); 473 do_end_request = 1; 474 } else if ((err & ~ATA_ABORTED) != 0) { 475 /* go to the default handler for other errors */ 476 ide_error(drive, "cdrom_decode_status", stat); 477 return 1; 478 } else if ((++rq->errors > ERROR_MAX)) { 479 /* we've racked up too many retries, abort */ 480 do_end_request = 1; 481 } 482 483 /* 484 * End a request through request sense analysis when we have 485 * sense data. We need this in order to perform end of media 486 * processing. 487 */ 488 if (do_end_request) 489 goto end_request; 490 491 /* 492 * If we got a CHECK_CONDITION status, queue 493 * a request sense command. 494 */ 495 if (stat & ATA_ERR) 496 cdrom_queue_request_sense(drive, NULL, NULL); 497 } else { 498 blk_dump_rq_flags(rq, PFX "bad rq"); 499 cdrom_end_request(drive, 0); 500 } 501 502 /* retry, or handle the next request */ 503 return 1; 504 505end_request: 506 if (stat & ATA_ERR) { 507 unsigned long flags; 508 509 spin_lock_irqsave(&ide_lock, flags); 510 blkdev_dequeue_request(rq); 511 HWGROUP(drive)->rq = NULL; 512 spin_unlock_irqrestore(&ide_lock, flags); 513 514 cdrom_queue_request_sense(drive, rq->sense, rq); 515 } else 516 cdrom_end_request(drive, 0); 517 518 return 1; 519} 520 521static int cdrom_timer_expiry(ide_drive_t *drive) 522{ 523 struct request *rq = HWGROUP(drive)->rq; 524 unsigned long wait = 0; 525 526 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__, 527 rq->cmd[0]); 528 529 /* 530 * Some commands are *slow* and normally take a long time to complete. 531 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 532 * commands/drives support that. Let ide_timer_expiry keep polling us 533 * for these. 534 */ 535 switch (rq->cmd[0]) { 536 case GPCMD_BLANK: 537 case GPCMD_FORMAT_UNIT: 538 case GPCMD_RESERVE_RZONE_TRACK: 539 case GPCMD_CLOSE_TRACK: 540 case GPCMD_FLUSH_CACHE: 541 wait = ATAPI_WAIT_PC; 542 break; 543 default: 544 if (!(rq->cmd_flags & REQ_QUIET)) 545 printk(KERN_INFO PFX "cmd 0x%x timed out\n", 546 rq->cmd[0]); 547 wait = 0; 548 break; 549 } 550 return wait; 551} 552 553/* 554 * Set up the device registers for transferring a packet command on DEV, 555 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 556 * which actually transfers the command to the drive. If this is a 557 * drq_interrupt device, this routine will arrange for HANDLER to be 558 * called when the interrupt from the drive arrives. Otherwise, HANDLER 559 * will be called immediately after the drive is prepared for the transfer. 560 */ 561static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 562 int xferlen, 563 ide_handler_t *handler) 564{ 565 ide_hwif_t *hwif = drive->hwif; 566 567 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen); 568 569 /* FIXME: for Virtual DMA we must check harder */ 570 if (drive->dma) 571 drive->dma = !hwif->dma_ops->dma_setup(drive); 572 573 /* set up the controller registers */ 574 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, 575 xferlen, drive->dma); 576 577 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 578 /* waiting for CDB interrupt, not DMA yet. */ 579 if (drive->dma) 580 drive->waiting_for_dma = 0; 581 582 /* packet command */ 583 ide_execute_command(drive, ATA_CMD_PACKET, handler, 584 ATAPI_WAIT_PC, cdrom_timer_expiry); 585 return ide_started; 586 } else { 587 ide_execute_pkt_cmd(drive); 588 589 return (*handler) (drive); 590 } 591} 592 593/* 594 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 595 * registers must have already been prepared by cdrom_start_packet_command. 596 * HANDLER is the interrupt handler to call when the command completes or 597 * there's data ready. 598 */ 599#define ATAPI_MIN_CDB_BYTES 12 600static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 601 struct request *rq, 602 ide_handler_t *handler) 603{ 604 ide_hwif_t *hwif = drive->hwif; 605 int cmd_len; 606 ide_startstop_t startstop; 607 608 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__); 609 610 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 611 /* 612 * Here we should have been called after receiving an interrupt 613 * from the device. DRQ should how be set. 614 */ 615 616 /* check for errors */ 617 if (cdrom_decode_status(drive, ATA_DRQ, NULL)) 618 return ide_stopped; 619 620 /* ok, next interrupt will be DMA interrupt */ 621 if (drive->dma) 622 drive->waiting_for_dma = 1; 623 } else { 624 /* otherwise, we must wait for DRQ to get set */ 625 if (ide_wait_stat(&startstop, drive, ATA_DRQ, 626 ATA_BUSY, WAIT_READY)) 627 return startstop; 628 } 629 630 /* arm the interrupt handler */ 631 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 632 633 /* ATAPI commands get padded out to 12 bytes minimum */ 634 cmd_len = COMMAND_SIZE(rq->cmd[0]); 635 if (cmd_len < ATAPI_MIN_CDB_BYTES) 636 cmd_len = ATAPI_MIN_CDB_BYTES; 637 638 /* send the command to the device */ 639 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); 640 641 /* start the DMA if need be */ 642 if (drive->dma) 643 hwif->dma_ops->dma_start(drive); 644 645 return ide_started; 646} 647 648/* 649 * Check the contents of the interrupt reason register from the cdrom 650 * and attempt to recover if there are problems. Returns 0 if everything's 651 * ok; nonzero if the request has been terminated. 652 */ 653static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 654 int len, int ireason, int rw) 655{ 656 ide_hwif_t *hwif = drive->hwif; 657 658 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n", 659 __func__, ireason, rw); 660 661 /* 662 * ireason == 0: the drive wants to receive data from us 663 * ireason == 2: the drive is expecting to transfer data to us 664 */ 665 if (ireason == (!rw << 1)) 666 return 0; 667 else if (ireason == (rw << 1)) { 668 669 /* whoops... */ 670 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 671 drive->name, __func__); 672 673 ide_pad_transfer(drive, rw, len); 674 } else if (rw == 0 && ireason == 1) { 675 /* 676 * Some drives (ASUS) seem to tell us that status info is 677 * available. Just get it and ignore. 678 */ 679 (void)hwif->tp_ops->read_status(hwif); 680 return 0; 681 } else { 682 /* drive wants a command packet, or invalid ireason... */ 683 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 684 drive->name, __func__, ireason); 685 } 686 687 if (rq->cmd_type == REQ_TYPE_ATA_PC) 688 rq->cmd_flags |= REQ_FAILED; 689 690 cdrom_end_request(drive, 0); 691 return -1; 692} 693 694/* 695 * Assume that the drive will always provide data in multiples of at least 696 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 697 */ 698static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 699{ 700 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len); 701 702 if ((len % SECTOR_SIZE) == 0) 703 return 0; 704 705 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 706 __func__, len); 707 708 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 709 printk(KERN_ERR PFX "This drive is not supported by this " 710 "version of the driver\n"); 711 else { 712 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 713 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 714 } 715 716 return 1; 717} 718 719static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 720 721static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 722 struct request *rq) 723{ 724 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__, 725 rq->cmd_flags); 726 727 if (rq_data_dir(rq) == READ) { 728 unsigned short sectors_per_frame = 729 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 730 int nskip = rq->sector & (sectors_per_frame - 1); 731 732 /* 733 * If the requested sector doesn't start on a frame boundary, 734 * we must adjust the start of the transfer so that it does, 735 * and remember to skip the first few sectors. 736 * 737 * If the rq->current_nr_sectors field is larger than the size 738 * of the buffer, it will mean that we're to skip a number of 739 * sectors equal to the amount by which rq->current_nr_sectors 740 * is larger than the buffer size. 741 */ 742 if (nskip > 0) { 743 /* sanity check... */ 744 if (rq->current_nr_sectors != 745 bio_cur_sectors(rq->bio)) { 746 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 747 drive->name, __func__, 748 rq->current_nr_sectors); 749 cdrom_end_request(drive, 0); 750 return ide_stopped; 751 } 752 rq->current_nr_sectors += nskip; 753 } 754 } 755 756 /* set up the command */ 757 rq->timeout = ATAPI_WAIT_PC; 758 759 return ide_started; 760} 761 762/* 763 * Routine to send a read/write packet command to the drive. This is usually 764 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 765 * devices, it is called from an interrupt when the drive is ready to accept 766 * the command. 767 */ 768static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 769{ 770 struct request *rq = drive->hwif->hwgroup->rq; 771 772 /* send the command to the drive and return */ 773 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 774} 775 776#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ 777#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ 778#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ 779 780static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) 781{ 782 struct cdrom_info *info = drive->driver_data; 783 int stat; 784 static int retry = 10; 785 786 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 787 788 if (cdrom_decode_status(drive, 0, &stat)) 789 return ide_stopped; 790 791 drive->atapi_flags |= IDE_AFLAG_SEEKING; 792 793 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { 794 if (--retry == 0) 795 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; 796 } 797 return ide_stopped; 798} 799 800static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq) 801{ 802 sector_t frame = rq->sector; 803 804 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 805 806 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); 807 808 memset(rq->cmd, 0, BLK_MAX_CDB); 809 rq->cmd[0] = GPCMD_SEEK; 810 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); 811 812 rq->timeout = ATAPI_WAIT_PC; 813} 814 815static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) 816{ 817 struct request *rq = drive->hwif->hwgroup->rq; 818 819 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); 820} 821 822/* 823 * Fix up a possibly partially-processed request so that we can start it over 824 * entirely, or even put it back on the request queue. 825 */ 826static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 827{ 828 829 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 830 831 if (rq->buffer != bio_data(rq->bio)) { 832 sector_t n = 833 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 834 835 rq->buffer = bio_data(rq->bio); 836 rq->nr_sectors += n; 837 rq->sector -= n; 838 } 839 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 840 rq->hard_cur_sectors = rq->current_nr_sectors; 841 rq->hard_nr_sectors = rq->nr_sectors; 842 rq->hard_sector = rq->sector; 843 rq->q->prep_rq_fn(rq->q, rq); 844} 845 846/* 847 * All other packet commands. 848 */ 849static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 850{ 851 852 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 853 854 /* 855 * Some of the trailing request sense fields are optional, 856 * and some drives don't send them. Sigh. 857 */ 858 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 859 rq->data_len > 0 && rq->data_len <= 5) 860 while (rq->data_len > 0) { 861 *(u8 *)rq->data++ = 0; 862 --rq->data_len; 863 } 864} 865 866int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 867 int write, void *buffer, unsigned *bufflen, 868 struct request_sense *sense, int timeout, 869 unsigned int cmd_flags) 870{ 871 struct cdrom_info *info = drive->driver_data; 872 struct request_sense local_sense; 873 int retries = 10; 874 unsigned int flags = 0; 875 876 if (!sense) 877 sense = &local_sense; 878 879 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, " 880 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write, 881 timeout, cmd_flags); 882 883 /* start of retry loop */ 884 do { 885 struct request *rq; 886 int error; 887 888 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 889 890 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 891 rq->cmd_type = REQ_TYPE_ATA_PC; 892 rq->sense = sense; 893 rq->cmd_flags |= cmd_flags; 894 rq->timeout = timeout; 895 if (buffer) { 896 rq->data = buffer; 897 rq->data_len = *bufflen; 898 } 899 900 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 901 902 if (buffer) 903 *bufflen = rq->data_len; 904 905 flags = rq->cmd_flags; 906 blk_put_request(rq); 907 908 /* 909 * FIXME: we should probably abort/retry or something in case of 910 * failure. 911 */ 912 if (flags & REQ_FAILED) { 913 /* 914 * The request failed. Retry if it was due to a unit 915 * attention status (usually means media was changed). 916 */ 917 struct request_sense *reqbuf = sense; 918 919 if (reqbuf->sense_key == UNIT_ATTENTION) 920 cdrom_saw_media_change(drive); 921 else if (reqbuf->sense_key == NOT_READY && 922 reqbuf->asc == 4 && reqbuf->ascq != 4) { 923 /* 924 * The drive is in the process of loading 925 * a disk. Retry, but wait a little to give 926 * the drive time to complete the load. 927 */ 928 ssleep(2); 929 } else { 930 /* otherwise, don't retry */ 931 retries = 0; 932 } 933 --retries; 934 } 935 936 /* end of retry loop */ 937 } while ((flags & REQ_FAILED) && retries >= 0); 938 939 /* return an error if the command failed */ 940 return (flags & REQ_FAILED) ? -EIO : 0; 941} 942 943/* 944 * Called from blk_end_request_callback() after the data of the request is 945 * completed and before the request itself is completed. By returning value '1', 946 * blk_end_request_callback() returns immediately without completing it. 947 */ 948static int cdrom_newpc_intr_dummy_cb(struct request *rq) 949{ 950 return 1; 951} 952 953static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 954{ 955 ide_hwif_t *hwif = drive->hwif; 956 struct request *rq = HWGROUP(drive)->rq; 957 xfer_func_t *xferfunc; 958 ide_expiry_t *expiry = NULL; 959 int dma_error = 0, dma, stat, thislen, uptodate = 0; 960 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 961 unsigned int timeout; 962 u16 len; 963 u8 ireason; 964 965 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n", 966 __func__, rq->cmd[0], write); 967 968 /* check for errors */ 969 dma = drive->dma; 970 if (dma) { 971 drive->dma = 0; 972 dma_error = hwif->dma_ops->dma_end(drive); 973 if (dma_error) { 974 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 975 write ? "write" : "read"); 976 ide_dma_off(drive); 977 } 978 } 979 980 if (cdrom_decode_status(drive, 0, &stat)) 981 return ide_stopped; 982 983 /* using dma, transfer is complete now */ 984 if (dma) { 985 if (dma_error) 986 return ide_error(drive, "dma error", stat); 987 if (blk_fs_request(rq)) { 988 ide_end_request(drive, 1, rq->nr_sectors); 989 return ide_stopped; 990 } 991 goto end_request; 992 } 993 994 ide_read_bcount_and_ireason(drive, &len, &ireason); 995 996 thislen = blk_fs_request(rq) ? len : rq->data_len; 997 if (thislen > len) 998 thislen = len; 999 1000 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n", 1001 __func__, stat, thislen); 1002 1003 /* If DRQ is clear, the command has completed. */ 1004 if ((stat & ATA_DRQ) == 0) { 1005 if (blk_fs_request(rq)) { 1006 /* 1007 * If we're not done reading/writing, complain. 1008 * Otherwise, complete the command normally. 1009 */ 1010 uptodate = 1; 1011 if (rq->current_nr_sectors > 0) { 1012 printk(KERN_ERR PFX "%s: %s: data underrun " 1013 "(%d blocks)\n", 1014 drive->name, __func__, 1015 rq->current_nr_sectors); 1016 if (!write) 1017 rq->cmd_flags |= REQ_FAILED; 1018 uptodate = 0; 1019 } 1020 cdrom_end_request(drive, uptodate); 1021 return ide_stopped; 1022 } else if (!blk_pc_request(rq)) { 1023 ide_cd_request_sense_fixup(drive, rq); 1024 /* complain if we still have data left to transfer */ 1025 uptodate = rq->data_len ? 0 : 1; 1026 } 1027 goto end_request; 1028 } 1029 1030 /* check which way to transfer data */ 1031 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 1032 return ide_stopped; 1033 1034 if (blk_fs_request(rq)) { 1035 if (write == 0) { 1036 int nskip; 1037 1038 if (ide_cd_check_transfer_size(drive, len)) { 1039 cdrom_end_request(drive, 0); 1040 return ide_stopped; 1041 } 1042 1043 /* 1044 * First, figure out if we need to bit-bucket 1045 * any of the leading sectors. 1046 */ 1047 nskip = min_t(int, rq->current_nr_sectors 1048 - bio_cur_sectors(rq->bio), 1049 thislen >> 9); 1050 if (nskip > 0) { 1051 ide_pad_transfer(drive, write, nskip << 9); 1052 rq->current_nr_sectors -= nskip; 1053 thislen -= (nskip << 9); 1054 } 1055 } 1056 } 1057 1058 if (ireason == 0) { 1059 write = 1; 1060 xferfunc = hwif->tp_ops->output_data; 1061 } else { 1062 write = 0; 1063 xferfunc = hwif->tp_ops->input_data; 1064 } 1065 1066 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, " 1067 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason); 1068 1069 /* transfer data */ 1070 while (thislen > 0) { 1071 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1072 int blen = rq->data_len; 1073 1074 /* bio backed? */ 1075 if (rq->bio) { 1076 if (blk_fs_request(rq)) { 1077 ptr = rq->buffer; 1078 blen = rq->current_nr_sectors << 9; 1079 } else { 1080 ptr = bio_data(rq->bio); 1081 blen = bio_iovec(rq->bio)->bv_len; 1082 } 1083 } 1084 1085 if (!ptr) { 1086 if (blk_fs_request(rq) && !write) 1087 /* 1088 * If the buffers are full, pipe the rest into 1089 * oblivion. 1090 */ 1091 ide_pad_transfer(drive, 0, thislen); 1092 else { 1093 printk(KERN_ERR PFX "%s: confused, missing data\n", 1094 drive->name); 1095 blk_dump_rq_flags(rq, rq_data_dir(rq) 1096 ? "cdrom_newpc_intr, write" 1097 : "cdrom_newpc_intr, read"); 1098 } 1099 break; 1100 } 1101 1102 if (blen > thislen) 1103 blen = thislen; 1104 1105 xferfunc(drive, NULL, ptr, blen); 1106 1107 thislen -= blen; 1108 len -= blen; 1109 1110 if (blk_fs_request(rq)) { 1111 rq->buffer += blen; 1112 rq->nr_sectors -= (blen >> 9); 1113 rq->current_nr_sectors -= (blen >> 9); 1114 rq->sector += (blen >> 9); 1115 1116 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1117 cdrom_end_request(drive, 1); 1118 } else { 1119 rq->data_len -= blen; 1120 1121 /* 1122 * The request can't be completed until DRQ is cleared. 1123 * So complete the data, but don't complete the request 1124 * using the dummy function for the callback feature 1125 * of blk_end_request_callback(). 1126 */ 1127 if (rq->bio) 1128 blk_end_request_callback(rq, 0, blen, 1129 cdrom_newpc_intr_dummy_cb); 1130 else 1131 rq->data += blen; 1132 } 1133 if (!write && blk_sense_request(rq)) 1134 rq->sense_len += blen; 1135 } 1136 1137 /* pad, if necessary */ 1138 if (!blk_fs_request(rq) && len > 0) 1139 ide_pad_transfer(drive, write, len); 1140 1141 if (blk_pc_request(rq)) { 1142 timeout = rq->timeout; 1143 } else { 1144 timeout = ATAPI_WAIT_PC; 1145 if (!blk_fs_request(rq)) 1146 expiry = cdrom_timer_expiry; 1147 } 1148 1149 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1150 return ide_started; 1151 1152end_request: 1153 if (blk_pc_request(rq)) { 1154 unsigned long flags; 1155 unsigned int dlen = rq->data_len; 1156 1157 if (dma) 1158 rq->data_len = 0; 1159 1160 spin_lock_irqsave(&ide_lock, flags); 1161 if (__blk_end_request(rq, 0, dlen)) 1162 BUG(); 1163 HWGROUP(drive)->rq = NULL; 1164 spin_unlock_irqrestore(&ide_lock, flags); 1165 } else { 1166 if (!uptodate) 1167 rq->cmd_flags |= REQ_FAILED; 1168 cdrom_end_request(drive, uptodate); 1169 } 1170 return ide_stopped; 1171} 1172 1173static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1174{ 1175 struct cdrom_info *cd = drive->driver_data; 1176 int write = rq_data_dir(rq) == WRITE; 1177 unsigned short sectors_per_frame = 1178 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1179 1180 ide_debug_log(IDE_DBG_RQ, "Call %s, write: 0x%x, secs_per_frame: %u\n", 1181 __func__, write, sectors_per_frame); 1182 1183 if (write) { 1184 /* disk has become write protected */ 1185 if (get_disk_ro(cd->disk)) { 1186 cdrom_end_request(drive, 0); 1187 return ide_stopped; 1188 } 1189 } else { 1190 /* 1191 * We may be retrying this request after an error. Fix up any 1192 * weirdness which might be present in the request packet. 1193 */ 1194 ide_cd_restore_request(drive, rq); 1195 } 1196 1197 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1198 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1199 (rq->sector & (sectors_per_frame - 1))) { 1200 if (write) { 1201 cdrom_end_request(drive, 0); 1202 return ide_stopped; 1203 } 1204 drive->dma = 0; 1205 } else 1206 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1207 1208 if (write) 1209 cd->devinfo.media_written = 1; 1210 1211 return ide_started; 1212} 1213 1214static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1215{ 1216 struct request *rq = HWGROUP(drive)->rq; 1217 1218 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1219} 1220 1221static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1222{ 1223 1224 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd_type: 0x%x\n", __func__, 1225 rq->cmd_type); 1226 1227 if (blk_pc_request(rq)) 1228 rq->cmd_flags |= REQ_QUIET; 1229 else 1230 rq->cmd_flags &= ~REQ_FAILED; 1231 1232 drive->dma = 0; 1233 1234 /* sg request */ 1235 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1236 struct request_queue *q = drive->queue; 1237 unsigned int alignment; 1238 char *buf; 1239 1240 if (rq->bio) 1241 buf = bio_data(rq->bio); 1242 else 1243 buf = rq->data; 1244 1245 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1246 1247 /* 1248 * check if dma is safe 1249 * 1250 * NOTE! The "len" and "addr" checks should possibly have 1251 * separate masks. 1252 */ 1253 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1254 if ((unsigned long)buf & alignment || rq->data_len & alignment 1255 || object_is_on_stack(buf)) 1256 drive->dma = 0; 1257 } 1258} 1259 1260/* 1261 * cdrom driver request routine. 1262 */ 1263static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1264 sector_t block) 1265{ 1266 struct cdrom_info *info = drive->driver_data; 1267 ide_handler_t *fn; 1268 int xferlen; 1269 1270 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd_type: 0x%x, block: %llu\n", 1271 __func__, rq->cmd_type, (unsigned long long)block); 1272 1273 if (blk_fs_request(rq)) { 1274 if (drive->atapi_flags & IDE_AFLAG_SEEKING) { 1275 ide_hwif_t *hwif = drive->hwif; 1276 unsigned long elapsed = jiffies - info->start_seek; 1277 int stat = hwif->tp_ops->read_status(hwif); 1278 1279 if ((stat & ATA_DSC) != ATA_DSC) { 1280 if (elapsed < IDECD_SEEK_TIMEOUT) { 1281 ide_stall_queue(drive, 1282 IDECD_SEEK_TIMER); 1283 return ide_stopped; 1284 } 1285 printk(KERN_ERR PFX "%s: DSC timeout\n", 1286 drive->name); 1287 } 1288 drive->atapi_flags &= ~IDE_AFLAG_SEEKING; 1289 } 1290 if (rq_data_dir(rq) == READ && 1291 IDE_LARGE_SEEK(info->last_block, block, 1292 IDECD_SEEK_THRESHOLD) && 1293 (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) { 1294 xferlen = 0; 1295 fn = cdrom_start_seek_continuation; 1296 1297 drive->dma = 0; 1298 info->start_seek = jiffies; 1299 1300 ide_cd_prepare_seek_request(drive, rq); 1301 } else { 1302 xferlen = 32768; 1303 fn = cdrom_start_rw_cont; 1304 1305 if (cdrom_start_rw(drive, rq) == ide_stopped) 1306 return ide_stopped; 1307 1308 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1309 return ide_stopped; 1310 } 1311 info->last_block = block; 1312 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1313 rq->cmd_type == REQ_TYPE_ATA_PC) { 1314 xferlen = rq->data_len; 1315 fn = cdrom_do_newpc_cont; 1316 1317 if (!rq->timeout) 1318 rq->timeout = ATAPI_WAIT_PC; 1319 1320 cdrom_do_block_pc(drive, rq); 1321 } else if (blk_special_request(rq)) { 1322 /* right now this can only be a reset... */ 1323 cdrom_end_request(drive, 1); 1324 return ide_stopped; 1325 } else { 1326 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1327 cdrom_end_request(drive, 0); 1328 return ide_stopped; 1329 } 1330 1331 return cdrom_start_packet_command(drive, xferlen, fn); 1332} 1333 1334/* 1335 * Ioctl handling. 1336 * 1337 * Routines which queue packet commands take as a final argument a pointer to a 1338 * request_sense struct. If execution of the command results in an error with a 1339 * CHECK CONDITION status, this structure will be filled with the results of the 1340 * subsequent request sense command. The pointer can also be NULL, in which case 1341 * no sense information is returned. 1342 */ 1343static void msf_from_bcd(struct atapi_msf *msf) 1344{ 1345 msf->minute = bcd2bin(msf->minute); 1346 msf->second = bcd2bin(msf->second); 1347 msf->frame = bcd2bin(msf->frame); 1348} 1349 1350int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1351{ 1352 struct cdrom_info *info = drive->driver_data; 1353 struct cdrom_device_info *cdi = &info->devinfo; 1354 unsigned char cmd[BLK_MAX_CDB]; 1355 1356 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1357 1358 memset(cmd, 0, BLK_MAX_CDB); 1359 cmd[0] = GPCMD_TEST_UNIT_READY; 1360 1361 /* 1362 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1363 * instead of supporting the LOAD_UNLOAD opcode. 1364 */ 1365 cmd[7] = cdi->sanyo_slot % 3; 1366 1367 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1368} 1369 1370static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1371 unsigned long *sectors_per_frame, 1372 struct request_sense *sense) 1373{ 1374 struct { 1375 __be32 lba; 1376 __be32 blocklen; 1377 } capbuf; 1378 1379 int stat; 1380 unsigned char cmd[BLK_MAX_CDB]; 1381 unsigned len = sizeof(capbuf); 1382 u32 blocklen; 1383 1384 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1385 1386 memset(cmd, 0, BLK_MAX_CDB); 1387 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1388 1389 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1390 REQ_QUIET); 1391 if (stat) 1392 return stat; 1393 1394 /* 1395 * Sanity check the given block size 1396 */ 1397 blocklen = be32_to_cpu(capbuf.blocklen); 1398 switch (blocklen) { 1399 case 512: 1400 case 1024: 1401 case 2048: 1402 case 4096: 1403 break; 1404 default: 1405 printk(KERN_ERR PFX "%s: weird block size %u\n", 1406 drive->name, blocklen); 1407 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1408 drive->name); 1409 blocklen = 2048; 1410 break; 1411 } 1412 1413 *capacity = 1 + be32_to_cpu(capbuf.lba); 1414 *sectors_per_frame = blocklen >> SECTOR_BITS; 1415 return 0; 1416} 1417 1418static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1419 int format, char *buf, int buflen, 1420 struct request_sense *sense) 1421{ 1422 unsigned char cmd[BLK_MAX_CDB]; 1423 1424 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1425 1426 memset(cmd, 0, BLK_MAX_CDB); 1427 1428 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1429 cmd[6] = trackno; 1430 cmd[7] = (buflen >> 8); 1431 cmd[8] = (buflen & 0xff); 1432 cmd[9] = (format << 6); 1433 1434 if (msf_flag) 1435 cmd[1] = 2; 1436 1437 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1438} 1439 1440/* Try to read the entire TOC for the disk into our internal buffer. */ 1441int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1442{ 1443 int stat, ntracks, i; 1444 struct cdrom_info *info = drive->driver_data; 1445 struct cdrom_device_info *cdi = &info->devinfo; 1446 struct atapi_toc *toc = info->toc; 1447 struct { 1448 struct atapi_toc_header hdr; 1449 struct atapi_toc_entry ent; 1450 } ms_tmp; 1451 long last_written; 1452 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1453 1454 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1455 1456 if (toc == NULL) { 1457 /* try to allocate space */ 1458 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1459 if (toc == NULL) { 1460 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1461 drive->name); 1462 return -ENOMEM; 1463 } 1464 info->toc = toc; 1465 } 1466 1467 /* 1468 * Check to see if the existing data is still valid. If it is, 1469 * just return. 1470 */ 1471 (void) cdrom_check_status(drive, sense); 1472 1473 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1474 return 0; 1475 1476 /* try to get the total cdrom capacity and sector size */ 1477 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1478 sense); 1479 if (stat) 1480 toc->capacity = 0x1fffff; 1481 1482 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1483 /* save a private copy of the TOC capacity for error handling */ 1484 drive->probed_capacity = toc->capacity * sectors_per_frame; 1485 1486 blk_queue_hardsect_size(drive->queue, 1487 sectors_per_frame << SECTOR_BITS); 1488 1489 /* first read just the header, so we know how long the TOC is */ 1490 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1491 sizeof(struct atapi_toc_header), sense); 1492 if (stat) 1493 return stat; 1494 1495 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1496 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1497 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1498 } 1499 1500 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1501 if (ntracks <= 0) 1502 return -EIO; 1503 if (ntracks > MAX_TRACKS) 1504 ntracks = MAX_TRACKS; 1505 1506 /* now read the whole schmeer */ 1507 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1508 (char *)&toc->hdr, 1509 sizeof(struct atapi_toc_header) + 1510 (ntracks + 1) * 1511 sizeof(struct atapi_toc_entry), sense); 1512 1513 if (stat && toc->hdr.first_track > 1) { 1514 /* 1515 * Cds with CDI tracks only don't have any TOC entries, despite 1516 * of this the returned values are 1517 * first_track == last_track = number of CDI tracks + 1, 1518 * so that this case is indistinguishable from the same layout 1519 * plus an additional audio track. If we get an error for the 1520 * regular case, we assume a CDI without additional audio 1521 * tracks. In this case the readable TOC is empty (CDI tracks 1522 * are not included) and only holds the Leadout entry. 1523 * 1524 * Heiko Eißfeldt. 1525 */ 1526 ntracks = 0; 1527 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1528 (char *)&toc->hdr, 1529 sizeof(struct atapi_toc_header) + 1530 (ntracks + 1) * 1531 sizeof(struct atapi_toc_entry), 1532 sense); 1533 if (stat) 1534 return stat; 1535 1536 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1537 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1538 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1539 } else { 1540 toc->hdr.first_track = CDROM_LEADOUT; 1541 toc->hdr.last_track = CDROM_LEADOUT; 1542 } 1543 } 1544 1545 if (stat) 1546 return stat; 1547 1548 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1549 1550 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1551 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1552 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1553 } 1554 1555 for (i = 0; i <= ntracks; i++) { 1556 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1557 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1558 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1559 msf_from_bcd(&toc->ent[i].addr.msf); 1560 } 1561 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1562 toc->ent[i].addr.msf.second, 1563 toc->ent[i].addr.msf.frame); 1564 } 1565 1566 if (toc->hdr.first_track != CDROM_LEADOUT) { 1567 /* read the multisession information */ 1568 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1569 sizeof(ms_tmp), sense); 1570 if (stat) 1571 return stat; 1572 1573 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1574 } else { 1575 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1576 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1577 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1578 } 1579 1580 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1581 /* re-read multisession information using MSF format */ 1582 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1583 sizeof(ms_tmp), sense); 1584 if (stat) 1585 return stat; 1586 1587 msf_from_bcd(&ms_tmp.ent.addr.msf); 1588 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1589 ms_tmp.ent.addr.msf.second, 1590 ms_tmp.ent.addr.msf.frame); 1591 } 1592 1593 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1594 1595 /* now try to get the total cdrom capacity */ 1596 stat = cdrom_get_last_written(cdi, &last_written); 1597 if (!stat && (last_written > toc->capacity)) { 1598 toc->capacity = last_written; 1599 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1600 drive->probed_capacity = toc->capacity * sectors_per_frame; 1601 } 1602 1603 /* Remember that we've read this stuff. */ 1604 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1605 1606 return 0; 1607} 1608 1609int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1610{ 1611 struct cdrom_info *info = drive->driver_data; 1612 struct cdrom_device_info *cdi = &info->devinfo; 1613 struct packet_command cgc; 1614 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1615 1616 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1617 1618 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1619 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1620 1621 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1622 do { 1623 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1624 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1625 if (!stat) 1626 break; 1627 } while (--attempts); 1628 return stat; 1629} 1630 1631void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1632{ 1633 struct cdrom_info *cd = drive->driver_data; 1634 u16 curspeed, maxspeed; 1635 1636 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1637 1638 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1639 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1640 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1641 } else { 1642 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1643 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1644 } 1645 1646 cd->current_speed = (curspeed + (176/2)) / 176; 1647 cd->max_speed = (maxspeed + (176/2)) / 176; 1648} 1649 1650#define IDE_CD_CAPABILITIES \ 1651 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1652 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1653 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1654 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1655 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1656 1657static struct cdrom_device_ops ide_cdrom_dops = { 1658 .open = ide_cdrom_open_real, 1659 .release = ide_cdrom_release_real, 1660 .drive_status = ide_cdrom_drive_status, 1661 .media_changed = ide_cdrom_check_media_change_real, 1662 .tray_move = ide_cdrom_tray_move, 1663 .lock_door = ide_cdrom_lock_door, 1664 .select_speed = ide_cdrom_select_speed, 1665 .get_last_session = ide_cdrom_get_last_session, 1666 .get_mcn = ide_cdrom_get_mcn, 1667 .reset = ide_cdrom_reset, 1668 .audio_ioctl = ide_cdrom_audio_ioctl, 1669 .capability = IDE_CD_CAPABILITIES, 1670 .generic_packet = ide_cdrom_packet, 1671}; 1672 1673static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1674{ 1675 struct cdrom_info *info = drive->driver_data; 1676 struct cdrom_device_info *devinfo = &info->devinfo; 1677 1678 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots); 1679 1680 devinfo->ops = &ide_cdrom_dops; 1681 devinfo->speed = info->current_speed; 1682 devinfo->capacity = nslots; 1683 devinfo->handle = drive; 1684 strcpy(devinfo->name, drive->name); 1685 1686 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1687 devinfo->mask |= CDC_SELECT_SPEED; 1688 1689 devinfo->disk = info->disk; 1690 return register_cdrom(devinfo); 1691} 1692 1693static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1694{ 1695 struct cdrom_info *cd = drive->driver_data; 1696 struct cdrom_device_info *cdi = &cd->devinfo; 1697 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1698 mechtype_t mechtype; 1699 int nslots = 1; 1700 1701 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, " 1702 "drive->atapi_flags: 0x%lx\n", __func__, drive->media, 1703 drive->atapi_flags); 1704 1705 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1706 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1707 CDC_MO_DRIVE | CDC_RAM); 1708 1709 if (drive->media == ide_optical) { 1710 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1711 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1712 drive->name); 1713 return nslots; 1714 } 1715 1716 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1717 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1718 cdi->mask &= ~CDC_PLAY_AUDIO; 1719 return nslots; 1720 } 1721 1722 /* 1723 * We have to cheat a little here. the packet will eventually be queued 1724 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1725 * Since this device hasn't been registered with the Uniform layer yet, 1726 * it can't do this. Same goes for cdi->ops. 1727 */ 1728 cdi->handle = drive; 1729 cdi->ops = &ide_cdrom_dops; 1730 1731 if (ide_cdrom_get_capabilities(drive, buf)) 1732 return 0; 1733 1734 if ((buf[8 + 6] & 0x01) == 0) 1735 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK; 1736 if (buf[8 + 6] & 0x08) 1737 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1738 if (buf[8 + 3] & 0x01) 1739 cdi->mask &= ~CDC_CD_R; 1740 if (buf[8 + 3] & 0x02) 1741 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1742 if (buf[8 + 2] & 0x38) 1743 cdi->mask &= ~CDC_DVD; 1744 if (buf[8 + 3] & 0x20) 1745 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1746 if (buf[8 + 3] & 0x10) 1747 cdi->mask &= ~CDC_DVD_R; 1748 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1749 cdi->mask &= ~CDC_PLAY_AUDIO; 1750 1751 mechtype = buf[8 + 6] >> 5; 1752 if (mechtype == mechtype_caddy || 1753 mechtype == mechtype_popup || 1754 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1755 cdi->mask |= CDC_CLOSE_TRAY; 1756 1757 if (cdi->sanyo_slot > 0) { 1758 cdi->mask &= ~CDC_SELECT_DISC; 1759 nslots = 3; 1760 } else if (mechtype == mechtype_individual_changer || 1761 mechtype == mechtype_cartridge_changer) { 1762 nslots = cdrom_number_of_slots(cdi); 1763 if (nslots > 1) 1764 cdi->mask &= ~CDC_SELECT_DISC; 1765 } 1766 1767 ide_cdrom_update_speed(drive, buf); 1768 1769 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1770 1771 /* don't print speed if the drive reported 0 */ 1772 if (cd->max_speed) 1773 printk(KERN_CONT " %dX", cd->max_speed); 1774 1775 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1776 1777 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1778 printk(KERN_CONT " DVD%s%s", 1779 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1780 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM"); 1781 1782 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1783 printk(KERN_CONT " CD%s%s", 1784 (cdi->mask & CDC_CD_R) ? "" : "-R", 1785 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1786 1787 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1788 printk(KERN_CONT " changer w/%d slots", nslots); 1789 else 1790 printk(KERN_CONT " drive"); 1791 1792 printk(KERN_CONT ", %dkB Cache\n", 1793 be16_to_cpup((__be16 *)&buf[8 + 12])); 1794 1795 return nslots; 1796} 1797 1798/* standard prep_rq_fn that builds 10 byte cmds */ 1799static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1800{ 1801 int hard_sect = queue_hardsect_size(q); 1802 long block = (long)rq->hard_sector / (hard_sect >> 9); 1803 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1804 1805 memset(rq->cmd, 0, BLK_MAX_CDB); 1806 1807 if (rq_data_dir(rq) == READ) 1808 rq->cmd[0] = GPCMD_READ_10; 1809 else 1810 rq->cmd[0] = GPCMD_WRITE_10; 1811 1812 /* 1813 * fill in lba 1814 */ 1815 rq->cmd[2] = (block >> 24) & 0xff; 1816 rq->cmd[3] = (block >> 16) & 0xff; 1817 rq->cmd[4] = (block >> 8) & 0xff; 1818 rq->cmd[5] = block & 0xff; 1819 1820 /* 1821 * and transfer length 1822 */ 1823 rq->cmd[7] = (blocks >> 8) & 0xff; 1824 rq->cmd[8] = blocks & 0xff; 1825 rq->cmd_len = 10; 1826 return BLKPREP_OK; 1827} 1828 1829/* 1830 * Most of the SCSI commands are supported directly by ATAPI devices. 1831 * This transform handles the few exceptions. 1832 */ 1833static int ide_cdrom_prep_pc(struct request *rq) 1834{ 1835 u8 *c = rq->cmd; 1836 1837 /* transform 6-byte read/write commands to the 10-byte version */ 1838 if (c[0] == READ_6 || c[0] == WRITE_6) { 1839 c[8] = c[4]; 1840 c[5] = c[3]; 1841 c[4] = c[2]; 1842 c[3] = c[1] & 0x1f; 1843 c[2] = 0; 1844 c[1] &= 0xe0; 1845 c[0] += (READ_10 - READ_6); 1846 rq->cmd_len = 10; 1847 return BLKPREP_OK; 1848 } 1849 1850 /* 1851 * it's silly to pretend we understand 6-byte sense commands, just 1852 * reject with ILLEGAL_REQUEST and the caller should take the 1853 * appropriate action 1854 */ 1855 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1856 rq->errors = ILLEGAL_REQUEST; 1857 return BLKPREP_KILL; 1858 } 1859 1860 return BLKPREP_OK; 1861} 1862 1863static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1864{ 1865 if (blk_fs_request(rq)) 1866 return ide_cdrom_prep_fs(q, rq); 1867 else if (blk_pc_request(rq)) 1868 return ide_cdrom_prep_pc(rq); 1869 1870 return 0; 1871} 1872 1873struct cd_list_entry { 1874 const char *id_model; 1875 const char *id_firmware; 1876 unsigned int cd_flags; 1877}; 1878 1879#ifdef CONFIG_IDE_PROC_FS 1880static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1881{ 1882 unsigned long capacity, sectors_per_frame; 1883 1884 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1885 return 0; 1886 1887 return capacity * sectors_per_frame; 1888} 1889 1890static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1891 int count, int *eof, void *data) 1892{ 1893 ide_drive_t *drive = data; 1894 int len; 1895 1896 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1897 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1898} 1899 1900static ide_proc_entry_t idecd_proc[] = { 1901 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1902 { NULL, 0, NULL, NULL } 1903}; 1904 1905ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP); 1906 1907static const struct ide_proc_devset idecd_settings[] = { 1908 IDE_PROC_DEVSET(dsc_overlap, 0, 1), 1909 { 0 }, 1910}; 1911#endif 1912 1913static const struct cd_list_entry ide_cd_quirks_list[] = { 1914 /* Limit transfer size per interrupt. */ 1915 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1916 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1917 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1918 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1919 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1920 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1921 IDE_AFLAG_PRE_ATAPI12, }, 1922 /* Vertos 300, some versions of this drive like to talk BCD. */ 1923 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1924 /* Vertos 600 ESD. */ 1925 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1926 /* 1927 * Sanyo 3 CD changer uses a non-standard command for CD changing 1928 * (by default standard ATAPI support for CD changers is used). 1929 */ 1930 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1931 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1932 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1933 /* Stingray 8X CD-ROM. */ 1934 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1935 /* 1936 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1937 * mode sense page capabilities size, but older drives break. 1938 */ 1939 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1940 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1941 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1942 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1943 /* 1944 * Some drives used by Apple don't advertise audio play 1945 * but they do support reading TOC & audio datas. 1946 */ 1947 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1948 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1949 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1950 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1951 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1952 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1953 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1954 { NULL, NULL, 0 } 1955}; 1956 1957static unsigned int ide_cd_flags(u16 *id) 1958{ 1959 const struct cd_list_entry *cle = ide_cd_quirks_list; 1960 1961 while (cle->id_model) { 1962 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1963 (cle->id_firmware == NULL || 1964 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1965 return cle->cd_flags; 1966 cle++; 1967 } 1968 1969 return 0; 1970} 1971 1972static int ide_cdrom_setup(ide_drive_t *drive) 1973{ 1974 struct cdrom_info *cd = drive->driver_data; 1975 struct cdrom_device_info *cdi = &cd->devinfo; 1976 u16 *id = drive->id; 1977 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1978 int nslots; 1979 1980 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__); 1981 1982 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1983 blk_queue_dma_alignment(drive->queue, 31); 1984 blk_queue_update_dma_pad(drive->queue, 15); 1985 drive->queue->unplug_delay = (1 * HZ) / 1000; 1986 if (!drive->queue->unplug_delay) 1987 drive->queue->unplug_delay = 1; 1988 1989 drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT | 1990 ide_cd_flags(id); 1991 1992 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1993 fw_rev[4] == '1' && fw_rev[6] <= '2') 1994 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1995 IDE_AFLAG_TOCADDR_AS_BCD); 1996 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1997 fw_rev[4] == '1' && fw_rev[6] <= '2') 1998 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1999 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 2000 /* 3 => use CD in slot 0 */ 2001 cdi->sanyo_slot = 3; 2002 2003 nslots = ide_cdrom_probe_capabilities(drive); 2004 2005 /* set correct block size */ 2006 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 2007 2008 if (drive->next != drive) 2009 drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP; 2010 else 2011 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; 2012 2013 if (ide_cdrom_register(drive, nslots)) { 2014 printk(KERN_ERR PFX "%s: %s failed to register device with the" 2015 " cdrom driver.\n", drive->name, __func__); 2016 cd->devinfo.handle = NULL; 2017 return 1; 2018 } 2019 2020 ide_proc_register_driver(drive, cd->driver); 2021 return 0; 2022} 2023 2024static void ide_cd_remove(ide_drive_t *drive) 2025{ 2026 struct cdrom_info *info = drive->driver_data; 2027 2028 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 2029 2030 ide_proc_unregister_driver(drive, info->driver); 2031 2032 del_gendisk(info->disk); 2033 2034 ide_cd_put(info); 2035} 2036 2037static void ide_cd_release(struct kref *kref) 2038{ 2039 struct cdrom_info *info = to_ide_drv(kref, cdrom_info); 2040 struct cdrom_device_info *devinfo = &info->devinfo; 2041 ide_drive_t *drive = info->drive; 2042 struct gendisk *g = info->disk; 2043 2044 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 2045 2046 kfree(info->toc); 2047 if (devinfo->handle == drive) 2048 unregister_cdrom(devinfo); 2049 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; 2050 drive->driver_data = NULL; 2051 blk_queue_prep_rq(drive->queue, NULL); 2052 g->private_data = NULL; 2053 put_disk(g); 2054 kfree(info); 2055} 2056 2057static int ide_cd_probe(ide_drive_t *); 2058 2059static ide_driver_t ide_cdrom_driver = { 2060 .gen_driver = { 2061 .owner = THIS_MODULE, 2062 .name = "ide-cdrom", 2063 .bus = &ide_bus_type, 2064 }, 2065 .probe = ide_cd_probe, 2066 .remove = ide_cd_remove, 2067 .version = IDECD_VERSION, 2068 .do_request = ide_cd_do_request, 2069 .end_request = ide_end_request, 2070 .error = __ide_error, 2071#ifdef CONFIG_IDE_PROC_FS 2072 .proc = idecd_proc, 2073 .settings = idecd_settings, 2074#endif 2075}; 2076 2077static int idecd_open(struct inode *inode, struct file *file) 2078{ 2079 struct gendisk *disk = inode->i_bdev->bd_disk; 2080 struct cdrom_info *info; 2081 int rc = -ENOMEM; 2082 2083 info = ide_cd_get(disk); 2084 if (!info) 2085 return -ENXIO; 2086 2087 rc = cdrom_open(&info->devinfo, inode, file); 2088 2089 if (rc < 0) 2090 ide_cd_put(info); 2091 2092 return rc; 2093} 2094 2095static int idecd_release(struct inode *inode, struct file *file) 2096{ 2097 struct gendisk *disk = inode->i_bdev->bd_disk; 2098 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2099 2100 cdrom_release(&info->devinfo, file); 2101 2102 ide_cd_put(info); 2103 2104 return 0; 2105} 2106 2107static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2108{ 2109 struct packet_command cgc; 2110 char buffer[16]; 2111 int stat; 2112 char spindown; 2113 2114 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 2115 return -EFAULT; 2116 2117 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2118 2119 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2120 if (stat) 2121 return stat; 2122 2123 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 2124 return cdrom_mode_select(cdi, &cgc); 2125} 2126 2127static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2128{ 2129 struct packet_command cgc; 2130 char buffer[16]; 2131 int stat; 2132 char spindown; 2133 2134 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2135 2136 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2137 if (stat) 2138 return stat; 2139 2140 spindown = buffer[11] & 0x0f; 2141 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2142 return -EFAULT; 2143 return 0; 2144} 2145 2146static int idecd_ioctl(struct inode *inode, struct file *file, 2147 unsigned int cmd, unsigned long arg) 2148{ 2149 struct block_device *bdev = inode->i_bdev; 2150 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 2151 int err; 2152 2153 switch (cmd) { 2154 case CDROMSETSPINDOWN: 2155 return idecd_set_spindown(&info->devinfo, arg); 2156 case CDROMGETSPINDOWN: 2157 return idecd_get_spindown(&info->devinfo, arg); 2158 default: 2159 break; 2160 } 2161 2162 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg); 2163 if (err == -EINVAL) 2164 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg); 2165 2166 return err; 2167} 2168 2169static int idecd_media_changed(struct gendisk *disk) 2170{ 2171 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2172 return cdrom_media_changed(&info->devinfo); 2173} 2174 2175static int idecd_revalidate_disk(struct gendisk *disk) 2176{ 2177 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2178 struct request_sense sense; 2179 2180 ide_cd_read_toc(info->drive, &sense); 2181 2182 return 0; 2183} 2184 2185static struct block_device_operations idecd_ops = { 2186 .owner = THIS_MODULE, 2187 .open = idecd_open, 2188 .release = idecd_release, 2189 .ioctl = idecd_ioctl, 2190 .media_changed = idecd_media_changed, 2191 .revalidate_disk = idecd_revalidate_disk 2192}; 2193 2194/* module options */ 2195static char *ignore; 2196module_param(ignore, charp, 0400); 2197 2198static unsigned long debug_mask; 2199module_param(debug_mask, ulong, 0644); 2200 2201MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2202 2203static int ide_cd_probe(ide_drive_t *drive) 2204{ 2205 struct cdrom_info *info; 2206 struct gendisk *g; 2207 struct request_sense sense; 2208 2209 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, " 2210 "drive->media: 0x%x\n", __func__, drive->driver_req, 2211 drive->media); 2212 2213 if (!strstr("ide-cdrom", drive->driver_req)) 2214 goto failed; 2215 2216 if (drive->media != ide_cdrom && drive->media != ide_optical) 2217 goto failed; 2218 2219 /* skip drives that we were told to ignore */ 2220 if (ignore != NULL) { 2221 if (strstr(ignore, drive->name)) { 2222 printk(KERN_INFO PFX "ignoring drive %s\n", 2223 drive->name); 2224 goto failed; 2225 } 2226 } 2227 2228 drive->debug_mask = debug_mask; 2229 2230 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2231 if (info == NULL) { 2232 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 2233 drive->name); 2234 goto failed; 2235 } 2236 2237 g = alloc_disk(1 << PARTN_BITS); 2238 if (!g) 2239 goto out_free_cd; 2240 2241 ide_init_disk(g, drive); 2242 2243 kref_init(&info->kref); 2244 2245 info->drive = drive; 2246 info->driver = &ide_cdrom_driver; 2247 info->disk = g; 2248 2249 g->private_data = &info->driver; 2250 2251 drive->driver_data = info; 2252 2253 g->minors = 1; 2254 g->driverfs_dev = &drive->gendev; 2255 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2256 if (ide_cdrom_setup(drive)) { 2257 ide_cd_release(&info->kref); 2258 goto failed; 2259 } 2260 2261 ide_cd_read_toc(drive, &sense); 2262 g->fops = &idecd_ops; 2263 g->flags |= GENHD_FL_REMOVABLE; 2264 add_disk(g); 2265 return 0; 2266 2267out_free_cd: 2268 kfree(info); 2269failed: 2270 return -ENODEV; 2271} 2272 2273static void __exit ide_cdrom_exit(void) 2274{ 2275 driver_unregister(&ide_cdrom_driver.gen_driver); 2276} 2277 2278static int __init ide_cdrom_init(void) 2279{ 2280 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2281 return driver_register(&ide_cdrom_driver.gen_driver); 2282} 2283 2284MODULE_ALIAS("ide:*m-cdrom*"); 2285MODULE_ALIAS("ide-cd"); 2286module_init(ide_cdrom_init); 2287module_exit(ide_cdrom_exit); 2288MODULE_LICENSE("GPL"); 2289