ide-cd.c revision 6ea52226ca131a99bb619bd56fbeee566ea5a966
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->dev_flags |= IDE_DFLAG_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; 265 266 if (failed) { 267 if (failed->sense) { 268 sense = failed->sense; 269 failed->sense_len = rq->sense_len; 270 } 271 cdrom_analyze_sense_data(drive, failed, sense); 272 /* 273 * now end the failed request 274 */ 275 if (blk_fs_request(failed)) { 276 if (ide_end_dequeued_request(drive, failed, 0, 277 failed->hard_nr_sectors)) 278 BUG(); 279 } else { 280 if (blk_end_request(failed, -EIO, 281 failed->data_len)) 282 BUG(); 283 } 284 } else 285 cdrom_analyze_sense_data(drive, NULL, sense); 286 } 287 288 if (!rq->current_nr_sectors && blk_fs_request(rq)) 289 uptodate = 1; 290 /* make sure it's fully ended */ 291 if (blk_pc_request(rq)) 292 nsectors = (rq->data_len + 511) >> 9; 293 if (!nsectors) 294 nsectors = 1; 295 296 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n", 297 __func__, uptodate, nsectors); 298 299 ide_end_request(drive, uptodate, nsectors); 300} 301 302static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 303{ 304 if (st & 0x80) 305 return; 306 ide_dump_status(drive, msg, st); 307} 308 309/* 310 * Returns: 311 * 0: if the request should be continued. 312 * 1: if the request was ended. 313 */ 314static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 315{ 316 ide_hwif_t *hwif = drive->hwif; 317 ide_hwgroup_t *hwgroup = hwif->hwgroup; 318 struct request *rq = hwgroup->rq; 319 int stat, err, sense_key; 320 321 /* check for errors */ 322 stat = hwif->tp_ops->read_status(hwif); 323 324 if (stat_ret) 325 *stat_ret = stat; 326 327 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 328 return 0; 329 330 /* get the IDE error register */ 331 err = ide_read_error(drive); 332 sense_key = err >> 4; 333 334 if (rq == NULL) { 335 printk(KERN_ERR PFX "%s: missing rq in %s\n", 336 drive->name, __func__); 337 return 1; 338 } 339 340 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, " 341 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n", 342 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err); 343 344 if (blk_sense_request(rq)) { 345 /* 346 * We got an error trying to get sense info from the drive 347 * (probably while trying to recover from a former error). 348 * Just give up. 349 */ 350 rq->cmd_flags |= REQ_FAILED; 351 cdrom_end_request(drive, 0); 352 ide_error(drive, "request sense failure", stat); 353 return 1; 354 355 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 356 /* All other functions, except for READ. */ 357 358 /* 359 * if we have an error, pass back CHECK_CONDITION as the 360 * scsi status byte 361 */ 362 if (blk_pc_request(rq) && !rq->errors) 363 rq->errors = SAM_STAT_CHECK_CONDITION; 364 365 /* check for tray open */ 366 if (sense_key == NOT_READY) { 367 cdrom_saw_media_change(drive); 368 } else if (sense_key == UNIT_ATTENTION) { 369 /* check for media change */ 370 cdrom_saw_media_change(drive); 371 return 0; 372 } else if (sense_key == ILLEGAL_REQUEST && 373 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 374 /* 375 * Don't print error message for this condition-- 376 * SFF8090i indicates that 5/24/00 is the correct 377 * response to a request to close the tray if the 378 * drive doesn't have that capability. 379 * cdrom_log_sense() knows this! 380 */ 381 } else if (!(rq->cmd_flags & REQ_QUIET)) { 382 /* otherwise, print an error */ 383 ide_dump_status(drive, "packet command error", stat); 384 } 385 386 rq->cmd_flags |= REQ_FAILED; 387 388 /* 389 * instead of playing games with moving completions around, 390 * remove failed request completely and end it when the 391 * request sense has completed 392 */ 393 goto end_request; 394 395 } else if (blk_fs_request(rq)) { 396 int do_end_request = 0; 397 398 /* handle errors from READ and WRITE requests */ 399 400 if (blk_noretry_request(rq)) 401 do_end_request = 1; 402 403 if (sense_key == NOT_READY) { 404 /* tray open */ 405 if (rq_data_dir(rq) == READ) { 406 cdrom_saw_media_change(drive); 407 408 /* fail the request */ 409 printk(KERN_ERR PFX "%s: tray open\n", 410 drive->name); 411 do_end_request = 1; 412 } else { 413 struct cdrom_info *info = drive->driver_data; 414 415 /* 416 * Allow the drive 5 seconds to recover, some 417 * devices will return this error while flushing 418 * data from cache. 419 */ 420 if (!rq->errors) 421 info->write_timeout = jiffies + 422 ATAPI_WAIT_WRITE_BUSY; 423 rq->errors = 1; 424 if (time_after(jiffies, info->write_timeout)) 425 do_end_request = 1; 426 else { 427 struct request_queue *q = drive->queue; 428 unsigned long flags; 429 430 /* 431 * take a breather relying on the unplug 432 * timer to kick us again 433 */ 434 spin_lock_irqsave(q->queue_lock, flags); 435 blk_plug_device(q); 436 spin_unlock_irqrestore(q->queue_lock, flags); 437 438 return 1; 439 } 440 } 441 } else if (sense_key == UNIT_ATTENTION) { 442 /* media change */ 443 cdrom_saw_media_change(drive); 444 445 /* 446 * Arrange to retry the request but be sure to give up 447 * if we've retried too many times. 448 */ 449 if (++rq->errors > ERROR_MAX) 450 do_end_request = 1; 451 } else if (sense_key == ILLEGAL_REQUEST || 452 sense_key == DATA_PROTECT) { 453 /* 454 * No point in retrying after an illegal request or data 455 * protect error. 456 */ 457 ide_dump_status_no_sense(drive, "command error", stat); 458 do_end_request = 1; 459 } else if (sense_key == MEDIUM_ERROR) { 460 /* 461 * No point in re-trying a zillion times on a bad 462 * sector. If we got here the error is not correctable. 463 */ 464 ide_dump_status_no_sense(drive, 465 "media error (bad sector)", 466 stat); 467 do_end_request = 1; 468 } else if (sense_key == BLANK_CHECK) { 469 /* disk appears blank ?? */ 470 ide_dump_status_no_sense(drive, "media error (blank)", 471 stat); 472 do_end_request = 1; 473 } else if ((err & ~ATA_ABORTED) != 0) { 474 /* go to the default handler for other errors */ 475 ide_error(drive, "cdrom_decode_status", stat); 476 return 1; 477 } else if ((++rq->errors > ERROR_MAX)) { 478 /* we've racked up too many retries, abort */ 479 do_end_request = 1; 480 } 481 482 /* 483 * End a request through request sense analysis when we have 484 * sense data. We need this in order to perform end of media 485 * processing. 486 */ 487 if (do_end_request) 488 goto end_request; 489 490 /* 491 * If we got a CHECK_CONDITION status, queue 492 * a request sense command. 493 */ 494 if (stat & ATA_ERR) 495 cdrom_queue_request_sense(drive, NULL, NULL); 496 } else { 497 blk_dump_rq_flags(rq, PFX "bad rq"); 498 cdrom_end_request(drive, 0); 499 } 500 501 /* retry, or handle the next request */ 502 return 1; 503 504end_request: 505 if (stat & ATA_ERR) { 506 struct request_queue *q = drive->queue; 507 unsigned long flags; 508 509 spin_lock_irqsave(q->queue_lock, flags); 510 blkdev_dequeue_request(rq); 511 spin_unlock_irqrestore(q->queue_lock, flags); 512 513 hwgroup->rq = NULL; 514 515 cdrom_queue_request_sense(drive, rq->sense, rq); 516 } else 517 cdrom_end_request(drive, 0); 518 519 return 1; 520} 521 522static int cdrom_timer_expiry(ide_drive_t *drive) 523{ 524 struct request *rq = HWGROUP(drive)->rq; 525 unsigned long wait = 0; 526 527 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__, 528 rq->cmd[0]); 529 530 /* 531 * Some commands are *slow* and normally take a long time to complete. 532 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 533 * commands/drives support that. Let ide_timer_expiry keep polling us 534 * for these. 535 */ 536 switch (rq->cmd[0]) { 537 case GPCMD_BLANK: 538 case GPCMD_FORMAT_UNIT: 539 case GPCMD_RESERVE_RZONE_TRACK: 540 case GPCMD_CLOSE_TRACK: 541 case GPCMD_FLUSH_CACHE: 542 wait = ATAPI_WAIT_PC; 543 break; 544 default: 545 if (!(rq->cmd_flags & REQ_QUIET)) 546 printk(KERN_INFO PFX "cmd 0x%x timed out\n", 547 rq->cmd[0]); 548 wait = 0; 549 break; 550 } 551 return wait; 552} 553 554/* 555 * Set up the device registers for transferring a packet command on DEV, 556 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 557 * which actually transfers the command to the drive. If this is a 558 * drq_interrupt device, this routine will arrange for HANDLER to be 559 * called when the interrupt from the drive arrives. Otherwise, HANDLER 560 * will be called immediately after the drive is prepared for the transfer. 561 */ 562static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 563 int xferlen, 564 ide_handler_t *handler) 565{ 566 ide_hwif_t *hwif = drive->hwif; 567 568 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen); 569 570 /* FIXME: for Virtual DMA we must check harder */ 571 if (drive->dma) 572 drive->dma = !hwif->dma_ops->dma_setup(drive); 573 574 /* set up the controller registers */ 575 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, 576 xferlen, drive->dma); 577 578 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 579 /* waiting for CDB interrupt, not DMA yet. */ 580 if (drive->dma) 581 drive->waiting_for_dma = 0; 582 583 /* packet command */ 584 ide_execute_command(drive, ATA_CMD_PACKET, handler, 585 ATAPI_WAIT_PC, cdrom_timer_expiry); 586 return ide_started; 587 } else { 588 ide_execute_pkt_cmd(drive); 589 590 return (*handler) (drive); 591 } 592} 593 594/* 595 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 596 * registers must have already been prepared by cdrom_start_packet_command. 597 * HANDLER is the interrupt handler to call when the command completes or 598 * there's data ready. 599 */ 600#define ATAPI_MIN_CDB_BYTES 12 601static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 602 struct request *rq, 603 ide_handler_t *handler) 604{ 605 ide_hwif_t *hwif = drive->hwif; 606 int cmd_len; 607 ide_startstop_t startstop; 608 609 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__); 610 611 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 612 /* 613 * Here we should have been called after receiving an interrupt 614 * from the device. DRQ should how be set. 615 */ 616 617 /* check for errors */ 618 if (cdrom_decode_status(drive, ATA_DRQ, NULL)) 619 return ide_stopped; 620 621 /* ok, next interrupt will be DMA interrupt */ 622 if (drive->dma) 623 drive->waiting_for_dma = 1; 624 } else { 625 /* otherwise, we must wait for DRQ to get set */ 626 if (ide_wait_stat(&startstop, drive, ATA_DRQ, 627 ATA_BUSY, WAIT_READY)) 628 return startstop; 629 } 630 631 /* arm the interrupt handler */ 632 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 633 634 /* ATAPI commands get padded out to 12 bytes minimum */ 635 cmd_len = COMMAND_SIZE(rq->cmd[0]); 636 if (cmd_len < ATAPI_MIN_CDB_BYTES) 637 cmd_len = ATAPI_MIN_CDB_BYTES; 638 639 /* send the command to the device */ 640 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); 641 642 /* start the DMA if need be */ 643 if (drive->dma) 644 hwif->dma_ops->dma_start(drive); 645 646 return ide_started; 647} 648 649/* 650 * Check the contents of the interrupt reason register from the cdrom 651 * and attempt to recover if there are problems. Returns 0 if everything's 652 * ok; nonzero if the request has been terminated. 653 */ 654static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 655 int len, int ireason, int rw) 656{ 657 ide_hwif_t *hwif = drive->hwif; 658 659 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n", 660 __func__, ireason, rw); 661 662 /* 663 * ireason == 0: the drive wants to receive data from us 664 * ireason == 2: the drive is expecting to transfer data to us 665 */ 666 if (ireason == (!rw << 1)) 667 return 0; 668 else if (ireason == (rw << 1)) { 669 670 /* whoops... */ 671 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 672 drive->name, __func__); 673 674 ide_pad_transfer(drive, rw, len); 675 } else if (rw == 0 && ireason == 1) { 676 /* 677 * Some drives (ASUS) seem to tell us that status info is 678 * available. Just get it and ignore. 679 */ 680 (void)hwif->tp_ops->read_status(hwif); 681 return 0; 682 } else { 683 /* drive wants a command packet, or invalid ireason... */ 684 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 685 drive->name, __func__, ireason); 686 } 687 688 if (rq->cmd_type == REQ_TYPE_ATA_PC) 689 rq->cmd_flags |= REQ_FAILED; 690 691 cdrom_end_request(drive, 0); 692 return -1; 693} 694 695/* 696 * Assume that the drive will always provide data in multiples of at least 697 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 698 */ 699static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 700{ 701 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len); 702 703 if ((len % SECTOR_SIZE) == 0) 704 return 0; 705 706 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 707 __func__, len); 708 709 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 710 printk(KERN_ERR PFX "This drive is not supported by this " 711 "version of the driver\n"); 712 else { 713 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 714 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 715 } 716 717 return 1; 718} 719 720static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 721 722static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 723 struct request *rq) 724{ 725 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__, 726 rq->cmd_flags); 727 728 if (rq_data_dir(rq) == READ) { 729 unsigned short sectors_per_frame = 730 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 731 int nskip = rq->sector & (sectors_per_frame - 1); 732 733 /* 734 * If the requested sector doesn't start on a frame boundary, 735 * we must adjust the start of the transfer so that it does, 736 * and remember to skip the first few sectors. 737 * 738 * If the rq->current_nr_sectors field is larger than the size 739 * of the buffer, it will mean that we're to skip a number of 740 * sectors equal to the amount by which rq->current_nr_sectors 741 * is larger than the buffer size. 742 */ 743 if (nskip > 0) { 744 /* sanity check... */ 745 if (rq->current_nr_sectors != 746 bio_cur_sectors(rq->bio)) { 747 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 748 drive->name, __func__, 749 rq->current_nr_sectors); 750 cdrom_end_request(drive, 0); 751 return ide_stopped; 752 } 753 rq->current_nr_sectors += nskip; 754 } 755 } 756 757 /* set up the command */ 758 rq->timeout = ATAPI_WAIT_PC; 759 760 return ide_started; 761} 762 763/* 764 * Routine to send a read/write packet command to the drive. This is usually 765 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 766 * devices, it is called from an interrupt when the drive is ready to accept 767 * the command. 768 */ 769static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 770{ 771 struct request *rq = drive->hwif->hwgroup->rq; 772 773 /* send the command to the drive and return */ 774 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 775} 776 777#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ 778#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ 779#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ 780 781static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) 782{ 783 struct cdrom_info *info = drive->driver_data; 784 int stat; 785 static int retry = 10; 786 787 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 788 789 if (cdrom_decode_status(drive, 0, &stat)) 790 return ide_stopped; 791 792 drive->atapi_flags |= IDE_AFLAG_SEEKING; 793 794 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { 795 if (--retry == 0) 796 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; 797 } 798 return ide_stopped; 799} 800 801static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq) 802{ 803 sector_t frame = rq->sector; 804 805 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 806 807 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); 808 809 memset(rq->cmd, 0, BLK_MAX_CDB); 810 rq->cmd[0] = GPCMD_SEEK; 811 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); 812 813 rq->timeout = ATAPI_WAIT_PC; 814} 815 816static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) 817{ 818 struct request *rq = drive->hwif->hwgroup->rq; 819 820 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); 821} 822 823/* 824 * Fix up a possibly partially-processed request so that we can start it over 825 * entirely, or even put it back on the request queue. 826 */ 827static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 828{ 829 830 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 831 832 if (rq->buffer != bio_data(rq->bio)) { 833 sector_t n = 834 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 835 836 rq->buffer = bio_data(rq->bio); 837 rq->nr_sectors += n; 838 rq->sector -= n; 839 } 840 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 841 rq->hard_cur_sectors = rq->current_nr_sectors; 842 rq->hard_nr_sectors = rq->nr_sectors; 843 rq->hard_sector = rq->sector; 844 rq->q->prep_rq_fn(rq->q, rq); 845} 846 847static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 848{ 849 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n", 850 __func__, rq->cmd[0]); 851 852 /* 853 * Some of the trailing request sense fields are optional, 854 * and some drives don't send them. Sigh. 855 */ 856 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 857 rq->data_len > 0 && rq->data_len <= 5) 858 while (rq->data_len > 0) { 859 *(u8 *)rq->data++ = 0; 860 --rq->data_len; 861 } 862} 863 864int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 865 int write, void *buffer, unsigned *bufflen, 866 struct request_sense *sense, int timeout, 867 unsigned int cmd_flags) 868{ 869 struct cdrom_info *info = drive->driver_data; 870 struct request_sense local_sense; 871 int retries = 10; 872 unsigned int flags = 0; 873 874 if (!sense) 875 sense = &local_sense; 876 877 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, " 878 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write, 879 timeout, cmd_flags); 880 881 /* start of retry loop */ 882 do { 883 struct request *rq; 884 int error; 885 886 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 887 888 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 889 rq->cmd_type = REQ_TYPE_ATA_PC; 890 rq->sense = sense; 891 rq->cmd_flags |= cmd_flags; 892 rq->timeout = timeout; 893 if (buffer) { 894 rq->data = buffer; 895 rq->data_len = *bufflen; 896 } 897 898 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 899 900 if (buffer) 901 *bufflen = rq->data_len; 902 903 flags = rq->cmd_flags; 904 blk_put_request(rq); 905 906 /* 907 * FIXME: we should probably abort/retry or something in case of 908 * failure. 909 */ 910 if (flags & REQ_FAILED) { 911 /* 912 * The request failed. Retry if it was due to a unit 913 * attention status (usually means media was changed). 914 */ 915 struct request_sense *reqbuf = sense; 916 917 if (reqbuf->sense_key == UNIT_ATTENTION) 918 cdrom_saw_media_change(drive); 919 else if (reqbuf->sense_key == NOT_READY && 920 reqbuf->asc == 4 && reqbuf->ascq != 4) { 921 /* 922 * The drive is in the process of loading 923 * a disk. Retry, but wait a little to give 924 * the drive time to complete the load. 925 */ 926 ssleep(2); 927 } else { 928 /* otherwise, don't retry */ 929 retries = 0; 930 } 931 --retries; 932 } 933 934 /* end of retry loop */ 935 } while ((flags & REQ_FAILED) && retries >= 0); 936 937 /* return an error if the command failed */ 938 return (flags & REQ_FAILED) ? -EIO : 0; 939} 940 941/* 942 * Called from blk_end_request_callback() after the data of the request is 943 * completed and before the request itself is completed. By returning value '1', 944 * blk_end_request_callback() returns immediately without completing it. 945 */ 946static int cdrom_newpc_intr_dummy_cb(struct request *rq) 947{ 948 return 1; 949} 950 951static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 952{ 953 ide_hwif_t *hwif = drive->hwif; 954 ide_hwgroup_t *hwgroup = hwif->hwgroup; 955 struct request *rq = hwgroup->rq; 956 xfer_func_t *xferfunc; 957 ide_expiry_t *expiry = NULL; 958 int dma_error = 0, dma, stat, thislen, uptodate = 0; 959 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 960 unsigned int timeout; 961 u16 len; 962 u8 ireason; 963 964 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n", 965 __func__, rq->cmd[0], write); 966 967 /* check for errors */ 968 dma = drive->dma; 969 if (dma) { 970 drive->dma = 0; 971 dma_error = hwif->dma_ops->dma_end(drive); 972 if (dma_error) { 973 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 974 write ? "write" : "read"); 975 ide_dma_off(drive); 976 } 977 } 978 979 if (cdrom_decode_status(drive, 0, &stat)) 980 return ide_stopped; 981 982 /* using dma, transfer is complete now */ 983 if (dma) { 984 if (dma_error) 985 return ide_error(drive, "dma error", stat); 986 if (blk_fs_request(rq)) { 987 ide_end_request(drive, 1, rq->nr_sectors); 988 return ide_stopped; 989 } 990 goto end_request; 991 } 992 993 ide_read_bcount_and_ireason(drive, &len, &ireason); 994 995 thislen = blk_fs_request(rq) ? len : rq->data_len; 996 if (thislen > len) 997 thislen = len; 998 999 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n", 1000 __func__, stat, thislen); 1001 1002 /* If DRQ is clear, the command has completed. */ 1003 if ((stat & ATA_DRQ) == 0) { 1004 if (blk_fs_request(rq)) { 1005 /* 1006 * If we're not done reading/writing, complain. 1007 * Otherwise, complete the command normally. 1008 */ 1009 uptodate = 1; 1010 if (rq->current_nr_sectors > 0) { 1011 printk(KERN_ERR PFX "%s: %s: data underrun " 1012 "(%d blocks)\n", 1013 drive->name, __func__, 1014 rq->current_nr_sectors); 1015 if (!write) 1016 rq->cmd_flags |= REQ_FAILED; 1017 uptodate = 0; 1018 } 1019 cdrom_end_request(drive, uptodate); 1020 return ide_stopped; 1021 } else if (!blk_pc_request(rq)) { 1022 ide_cd_request_sense_fixup(drive, rq); 1023 /* complain if we still have data left to transfer */ 1024 uptodate = rq->data_len ? 0 : 1; 1025 } 1026 goto end_request; 1027 } 1028 1029 /* check which way to transfer data */ 1030 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 1031 return ide_stopped; 1032 1033 if (blk_fs_request(rq)) { 1034 if (write == 0) { 1035 int nskip; 1036 1037 if (ide_cd_check_transfer_size(drive, len)) { 1038 cdrom_end_request(drive, 0); 1039 return ide_stopped; 1040 } 1041 1042 /* 1043 * First, figure out if we need to bit-bucket 1044 * any of the leading sectors. 1045 */ 1046 nskip = min_t(int, rq->current_nr_sectors 1047 - bio_cur_sectors(rq->bio), 1048 thislen >> 9); 1049 if (nskip > 0) { 1050 ide_pad_transfer(drive, write, nskip << 9); 1051 rq->current_nr_sectors -= nskip; 1052 thislen -= (nskip << 9); 1053 } 1054 } 1055 } 1056 1057 if (ireason == 0) { 1058 write = 1; 1059 xferfunc = hwif->tp_ops->output_data; 1060 } else { 1061 write = 0; 1062 xferfunc = hwif->tp_ops->input_data; 1063 } 1064 1065 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, " 1066 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason); 1067 1068 /* transfer data */ 1069 while (thislen > 0) { 1070 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1071 int blen = rq->data_len; 1072 1073 /* bio backed? */ 1074 if (rq->bio) { 1075 if (blk_fs_request(rq)) { 1076 ptr = rq->buffer; 1077 blen = rq->current_nr_sectors << 9; 1078 } else { 1079 ptr = bio_data(rq->bio); 1080 blen = bio_iovec(rq->bio)->bv_len; 1081 } 1082 } 1083 1084 if (!ptr) { 1085 if (blk_fs_request(rq) && !write) 1086 /* 1087 * If the buffers are full, pipe the rest into 1088 * oblivion. 1089 */ 1090 ide_pad_transfer(drive, 0, thislen); 1091 else { 1092 printk(KERN_ERR PFX "%s: confused, missing data\n", 1093 drive->name); 1094 blk_dump_rq_flags(rq, rq_data_dir(rq) 1095 ? "cdrom_newpc_intr, write" 1096 : "cdrom_newpc_intr, read"); 1097 } 1098 break; 1099 } 1100 1101 if (blen > thislen) 1102 blen = thislen; 1103 1104 xferfunc(drive, NULL, ptr, blen); 1105 1106 thislen -= blen; 1107 len -= blen; 1108 1109 if (blk_fs_request(rq)) { 1110 rq->buffer += blen; 1111 rq->nr_sectors -= (blen >> 9); 1112 rq->current_nr_sectors -= (blen >> 9); 1113 rq->sector += (blen >> 9); 1114 1115 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1116 cdrom_end_request(drive, 1); 1117 } else { 1118 rq->data_len -= blen; 1119 1120 /* 1121 * The request can't be completed until DRQ is cleared. 1122 * So complete the data, but don't complete the request 1123 * using the dummy function for the callback feature 1124 * of blk_end_request_callback(). 1125 */ 1126 if (rq->bio) 1127 blk_end_request_callback(rq, 0, blen, 1128 cdrom_newpc_intr_dummy_cb); 1129 else 1130 rq->data += blen; 1131 } 1132 if (!write && blk_sense_request(rq)) 1133 rq->sense_len += blen; 1134 } 1135 1136 /* pad, if necessary */ 1137 if (!blk_fs_request(rq) && len > 0) 1138 ide_pad_transfer(drive, write, len); 1139 1140 if (blk_pc_request(rq)) { 1141 timeout = rq->timeout; 1142 } else { 1143 timeout = ATAPI_WAIT_PC; 1144 if (!blk_fs_request(rq)) 1145 expiry = cdrom_timer_expiry; 1146 } 1147 1148 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1149 return ide_started; 1150 1151end_request: 1152 if (blk_pc_request(rq)) { 1153 unsigned int dlen = rq->data_len; 1154 1155 if (dma) 1156 rq->data_len = 0; 1157 1158 if (blk_end_request(rq, 0, dlen)) 1159 BUG(); 1160 1161 hwgroup->rq = NULL; 1162 } else { 1163 if (!uptodate) 1164 rq->cmd_flags |= REQ_FAILED; 1165 cdrom_end_request(drive, uptodate); 1166 } 1167 return ide_stopped; 1168} 1169 1170static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1171{ 1172 struct cdrom_info *cd = drive->driver_data; 1173 int write = rq_data_dir(rq) == WRITE; 1174 unsigned short sectors_per_frame = 1175 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1176 1177 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, " 1178 "secs_per_frame: %u\n", 1179 __func__, rq->cmd[0], write, sectors_per_frame); 1180 1181 if (write) { 1182 /* disk has become write protected */ 1183 if (get_disk_ro(cd->disk)) { 1184 cdrom_end_request(drive, 0); 1185 return ide_stopped; 1186 } 1187 } else { 1188 /* 1189 * We may be retrying this request after an error. Fix up any 1190 * weirdness which might be present in the request packet. 1191 */ 1192 ide_cd_restore_request(drive, rq); 1193 } 1194 1195 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1196 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1197 (rq->sector & (sectors_per_frame - 1))) { 1198 if (write) { 1199 cdrom_end_request(drive, 0); 1200 return ide_stopped; 1201 } 1202 drive->dma = 0; 1203 } else 1204 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1205 1206 if (write) 1207 cd->devinfo.media_written = 1; 1208 1209 return ide_started; 1210} 1211 1212static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1213{ 1214 struct request *rq = HWGROUP(drive)->rq; 1215 1216 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1217} 1218 1219static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1220{ 1221 1222 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, " 1223 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0], 1224 rq->cmd_type); 1225 1226 if (blk_pc_request(rq)) 1227 rq->cmd_flags |= REQ_QUIET; 1228 else 1229 rq->cmd_flags &= ~REQ_FAILED; 1230 1231 drive->dma = 0; 1232 1233 /* sg request */ 1234 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1235 struct request_queue *q = drive->queue; 1236 unsigned int alignment; 1237 char *buf; 1238 1239 if (rq->bio) 1240 buf = bio_data(rq->bio); 1241 else 1242 buf = rq->data; 1243 1244 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1245 1246 /* 1247 * check if dma is safe 1248 * 1249 * NOTE! The "len" and "addr" checks should possibly have 1250 * separate masks. 1251 */ 1252 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1253 if ((unsigned long)buf & alignment 1254 || rq->data_len & q->dma_pad_mask 1255 || object_is_on_stack(buf)) 1256 drive->dma = 0; 1257 } 1258} 1259 1260static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1261 sector_t block) 1262{ 1263 struct cdrom_info *info = drive->driver_data; 1264 ide_handler_t *fn; 1265 int xferlen; 1266 1267 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, " 1268 "rq->cmd_type: 0x%x, block: %llu\n", 1269 __func__, rq->cmd[0], rq->cmd_type, 1270 (unsigned long long)block); 1271 1272 if (blk_fs_request(rq)) { 1273 if (drive->atapi_flags & IDE_AFLAG_SEEKING) { 1274 ide_hwif_t *hwif = drive->hwif; 1275 unsigned long elapsed = jiffies - info->start_seek; 1276 int stat = hwif->tp_ops->read_status(hwif); 1277 1278 if ((stat & ATA_DSC) != ATA_DSC) { 1279 if (elapsed < IDECD_SEEK_TIMEOUT) { 1280 ide_stall_queue(drive, 1281 IDECD_SEEK_TIMER); 1282 return ide_stopped; 1283 } 1284 printk(KERN_ERR PFX "%s: DSC timeout\n", 1285 drive->name); 1286 } 1287 drive->atapi_flags &= ~IDE_AFLAG_SEEKING; 1288 } 1289 if (rq_data_dir(rq) == READ && 1290 IDE_LARGE_SEEK(info->last_block, block, 1291 IDECD_SEEK_THRESHOLD) && 1292 (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) { 1293 xferlen = 0; 1294 fn = cdrom_start_seek_continuation; 1295 1296 drive->dma = 0; 1297 info->start_seek = jiffies; 1298 1299 ide_cd_prepare_seek_request(drive, rq); 1300 } else { 1301 xferlen = 32768; 1302 fn = cdrom_start_rw_cont; 1303 1304 if (cdrom_start_rw(drive, rq) == ide_stopped) 1305 return ide_stopped; 1306 1307 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1308 return ide_stopped; 1309 } 1310 info->last_block = block; 1311 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1312 rq->cmd_type == REQ_TYPE_ATA_PC) { 1313 xferlen = rq->data_len; 1314 fn = cdrom_do_newpc_cont; 1315 1316 if (!rq->timeout) 1317 rq->timeout = ATAPI_WAIT_PC; 1318 1319 cdrom_do_block_pc(drive, rq); 1320 } else if (blk_special_request(rq)) { 1321 /* right now this can only be a reset... */ 1322 cdrom_end_request(drive, 1); 1323 return ide_stopped; 1324 } else { 1325 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1326 cdrom_end_request(drive, 0); 1327 return ide_stopped; 1328 } 1329 1330 return cdrom_start_packet_command(drive, xferlen, fn); 1331} 1332 1333/* 1334 * Ioctl handling. 1335 * 1336 * Routines which queue packet commands take as a final argument a pointer to a 1337 * request_sense struct. If execution of the command results in an error with a 1338 * CHECK CONDITION status, this structure will be filled with the results of the 1339 * subsequent request sense command. The pointer can also be NULL, in which case 1340 * no sense information is returned. 1341 */ 1342static void msf_from_bcd(struct atapi_msf *msf) 1343{ 1344 msf->minute = bcd2bin(msf->minute); 1345 msf->second = bcd2bin(msf->second); 1346 msf->frame = bcd2bin(msf->frame); 1347} 1348 1349int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1350{ 1351 struct cdrom_info *info = drive->driver_data; 1352 struct cdrom_device_info *cdi = &info->devinfo; 1353 unsigned char cmd[BLK_MAX_CDB]; 1354 1355 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1356 1357 memset(cmd, 0, BLK_MAX_CDB); 1358 cmd[0] = GPCMD_TEST_UNIT_READY; 1359 1360 /* 1361 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1362 * instead of supporting the LOAD_UNLOAD opcode. 1363 */ 1364 cmd[7] = cdi->sanyo_slot % 3; 1365 1366 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1367} 1368 1369static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1370 unsigned long *sectors_per_frame, 1371 struct request_sense *sense) 1372{ 1373 struct { 1374 __be32 lba; 1375 __be32 blocklen; 1376 } capbuf; 1377 1378 int stat; 1379 unsigned char cmd[BLK_MAX_CDB]; 1380 unsigned len = sizeof(capbuf); 1381 u32 blocklen; 1382 1383 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1384 1385 memset(cmd, 0, BLK_MAX_CDB); 1386 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1387 1388 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1389 REQ_QUIET); 1390 if (stat) 1391 return stat; 1392 1393 /* 1394 * Sanity check the given block size 1395 */ 1396 blocklen = be32_to_cpu(capbuf.blocklen); 1397 switch (blocklen) { 1398 case 512: 1399 case 1024: 1400 case 2048: 1401 case 4096: 1402 break; 1403 default: 1404 printk(KERN_ERR PFX "%s: weird block size %u\n", 1405 drive->name, blocklen); 1406 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1407 drive->name); 1408 blocklen = 2048; 1409 break; 1410 } 1411 1412 *capacity = 1 + be32_to_cpu(capbuf.lba); 1413 *sectors_per_frame = blocklen >> SECTOR_BITS; 1414 1415 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n", 1416 __func__, *capacity, *sectors_per_frame); 1417 1418 return 0; 1419} 1420 1421static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1422 int format, char *buf, int buflen, 1423 struct request_sense *sense) 1424{ 1425 unsigned char cmd[BLK_MAX_CDB]; 1426 1427 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1428 1429 memset(cmd, 0, BLK_MAX_CDB); 1430 1431 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1432 cmd[6] = trackno; 1433 cmd[7] = (buflen >> 8); 1434 cmd[8] = (buflen & 0xff); 1435 cmd[9] = (format << 6); 1436 1437 if (msf_flag) 1438 cmd[1] = 2; 1439 1440 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1441} 1442 1443/* Try to read the entire TOC for the disk into our internal buffer. */ 1444int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1445{ 1446 int stat, ntracks, i; 1447 struct cdrom_info *info = drive->driver_data; 1448 struct cdrom_device_info *cdi = &info->devinfo; 1449 struct atapi_toc *toc = info->toc; 1450 struct { 1451 struct atapi_toc_header hdr; 1452 struct atapi_toc_entry ent; 1453 } ms_tmp; 1454 long last_written; 1455 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1456 1457 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1458 1459 if (toc == NULL) { 1460 /* try to allocate space */ 1461 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1462 if (toc == NULL) { 1463 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1464 drive->name); 1465 return -ENOMEM; 1466 } 1467 info->toc = toc; 1468 } 1469 1470 /* 1471 * Check to see if the existing data is still valid. If it is, 1472 * just return. 1473 */ 1474 (void) cdrom_check_status(drive, sense); 1475 1476 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1477 return 0; 1478 1479 /* try to get the total cdrom capacity and sector size */ 1480 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1481 sense); 1482 if (stat) 1483 toc->capacity = 0x1fffff; 1484 1485 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1486 /* save a private copy of the TOC capacity for error handling */ 1487 drive->probed_capacity = toc->capacity * sectors_per_frame; 1488 1489 blk_queue_hardsect_size(drive->queue, 1490 sectors_per_frame << SECTOR_BITS); 1491 1492 /* first read just the header, so we know how long the TOC is */ 1493 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1494 sizeof(struct atapi_toc_header), sense); 1495 if (stat) 1496 return stat; 1497 1498 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1499 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1500 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1501 } 1502 1503 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1504 if (ntracks <= 0) 1505 return -EIO; 1506 if (ntracks > MAX_TRACKS) 1507 ntracks = MAX_TRACKS; 1508 1509 /* now read the whole schmeer */ 1510 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1511 (char *)&toc->hdr, 1512 sizeof(struct atapi_toc_header) + 1513 (ntracks + 1) * 1514 sizeof(struct atapi_toc_entry), sense); 1515 1516 if (stat && toc->hdr.first_track > 1) { 1517 /* 1518 * Cds with CDI tracks only don't have any TOC entries, despite 1519 * of this the returned values are 1520 * first_track == last_track = number of CDI tracks + 1, 1521 * so that this case is indistinguishable from the same layout 1522 * plus an additional audio track. If we get an error for the 1523 * regular case, we assume a CDI without additional audio 1524 * tracks. In this case the readable TOC is empty (CDI tracks 1525 * are not included) and only holds the Leadout entry. 1526 * 1527 * Heiko Eißfeldt. 1528 */ 1529 ntracks = 0; 1530 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1531 (char *)&toc->hdr, 1532 sizeof(struct atapi_toc_header) + 1533 (ntracks + 1) * 1534 sizeof(struct atapi_toc_entry), 1535 sense); 1536 if (stat) 1537 return stat; 1538 1539 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1540 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1541 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1542 } else { 1543 toc->hdr.first_track = CDROM_LEADOUT; 1544 toc->hdr.last_track = CDROM_LEADOUT; 1545 } 1546 } 1547 1548 if (stat) 1549 return stat; 1550 1551 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1552 1553 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1554 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1555 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1556 } 1557 1558 for (i = 0; i <= ntracks; i++) { 1559 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1560 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1561 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1562 msf_from_bcd(&toc->ent[i].addr.msf); 1563 } 1564 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1565 toc->ent[i].addr.msf.second, 1566 toc->ent[i].addr.msf.frame); 1567 } 1568 1569 if (toc->hdr.first_track != CDROM_LEADOUT) { 1570 /* read the multisession information */ 1571 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1572 sizeof(ms_tmp), sense); 1573 if (stat) 1574 return stat; 1575 1576 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1577 } else { 1578 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1579 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1580 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1581 } 1582 1583 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1584 /* re-read multisession information using MSF format */ 1585 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1586 sizeof(ms_tmp), sense); 1587 if (stat) 1588 return stat; 1589 1590 msf_from_bcd(&ms_tmp.ent.addr.msf); 1591 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1592 ms_tmp.ent.addr.msf.second, 1593 ms_tmp.ent.addr.msf.frame); 1594 } 1595 1596 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1597 1598 /* now try to get the total cdrom capacity */ 1599 stat = cdrom_get_last_written(cdi, &last_written); 1600 if (!stat && (last_written > toc->capacity)) { 1601 toc->capacity = last_written; 1602 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1603 drive->probed_capacity = toc->capacity * sectors_per_frame; 1604 } 1605 1606 /* Remember that we've read this stuff. */ 1607 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1608 1609 return 0; 1610} 1611 1612int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1613{ 1614 struct cdrom_info *info = drive->driver_data; 1615 struct cdrom_device_info *cdi = &info->devinfo; 1616 struct packet_command cgc; 1617 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1618 1619 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1620 1621 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1622 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1623 1624 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1625 do { 1626 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1627 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1628 if (!stat) 1629 break; 1630 } while (--attempts); 1631 return stat; 1632} 1633 1634void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1635{ 1636 struct cdrom_info *cd = drive->driver_data; 1637 u16 curspeed, maxspeed; 1638 1639 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 1640 1641 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1642 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1643 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1644 } else { 1645 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1646 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1647 } 1648 1649 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n", 1650 __func__, curspeed, maxspeed); 1651 1652 cd->current_speed = (curspeed + (176/2)) / 176; 1653 cd->max_speed = (maxspeed + (176/2)) / 176; 1654} 1655 1656#define IDE_CD_CAPABILITIES \ 1657 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1658 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1659 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1660 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1661 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1662 1663static struct cdrom_device_ops ide_cdrom_dops = { 1664 .open = ide_cdrom_open_real, 1665 .release = ide_cdrom_release_real, 1666 .drive_status = ide_cdrom_drive_status, 1667 .media_changed = ide_cdrom_check_media_change_real, 1668 .tray_move = ide_cdrom_tray_move, 1669 .lock_door = ide_cdrom_lock_door, 1670 .select_speed = ide_cdrom_select_speed, 1671 .get_last_session = ide_cdrom_get_last_session, 1672 .get_mcn = ide_cdrom_get_mcn, 1673 .reset = ide_cdrom_reset, 1674 .audio_ioctl = ide_cdrom_audio_ioctl, 1675 .capability = IDE_CD_CAPABILITIES, 1676 .generic_packet = ide_cdrom_packet, 1677}; 1678 1679static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1680{ 1681 struct cdrom_info *info = drive->driver_data; 1682 struct cdrom_device_info *devinfo = &info->devinfo; 1683 1684 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots); 1685 1686 devinfo->ops = &ide_cdrom_dops; 1687 devinfo->speed = info->current_speed; 1688 devinfo->capacity = nslots; 1689 devinfo->handle = drive; 1690 strcpy(devinfo->name, drive->name); 1691 1692 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1693 devinfo->mask |= CDC_SELECT_SPEED; 1694 1695 devinfo->disk = info->disk; 1696 return register_cdrom(devinfo); 1697} 1698 1699static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1700{ 1701 struct cdrom_info *cd = drive->driver_data; 1702 struct cdrom_device_info *cdi = &cd->devinfo; 1703 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1704 mechtype_t mechtype; 1705 int nslots = 1; 1706 1707 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, " 1708 "drive->atapi_flags: 0x%lx\n", __func__, drive->media, 1709 drive->atapi_flags); 1710 1711 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1712 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1713 CDC_MO_DRIVE | CDC_RAM); 1714 1715 if (drive->media == ide_optical) { 1716 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1717 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1718 drive->name); 1719 return nslots; 1720 } 1721 1722 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1723 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1724 cdi->mask &= ~CDC_PLAY_AUDIO; 1725 return nslots; 1726 } 1727 1728 /* 1729 * We have to cheat a little here. the packet will eventually be queued 1730 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1731 * Since this device hasn't been registered with the Uniform layer yet, 1732 * it can't do this. Same goes for cdi->ops. 1733 */ 1734 cdi->handle = drive; 1735 cdi->ops = &ide_cdrom_dops; 1736 1737 if (ide_cdrom_get_capabilities(drive, buf)) 1738 return 0; 1739 1740 if ((buf[8 + 6] & 0x01) == 0) 1741 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1742 if (buf[8 + 6] & 0x08) 1743 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1744 if (buf[8 + 3] & 0x01) 1745 cdi->mask &= ~CDC_CD_R; 1746 if (buf[8 + 3] & 0x02) 1747 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1748 if (buf[8 + 2] & 0x38) 1749 cdi->mask &= ~CDC_DVD; 1750 if (buf[8 + 3] & 0x20) 1751 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1752 if (buf[8 + 3] & 0x10) 1753 cdi->mask &= ~CDC_DVD_R; 1754 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1755 cdi->mask &= ~CDC_PLAY_AUDIO; 1756 1757 mechtype = buf[8 + 6] >> 5; 1758 if (mechtype == mechtype_caddy || 1759 mechtype == mechtype_popup || 1760 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1761 cdi->mask |= CDC_CLOSE_TRAY; 1762 1763 if (cdi->sanyo_slot > 0) { 1764 cdi->mask &= ~CDC_SELECT_DISC; 1765 nslots = 3; 1766 } else if (mechtype == mechtype_individual_changer || 1767 mechtype == mechtype_cartridge_changer) { 1768 nslots = cdrom_number_of_slots(cdi); 1769 if (nslots > 1) 1770 cdi->mask &= ~CDC_SELECT_DISC; 1771 } 1772 1773 ide_cdrom_update_speed(drive, buf); 1774 1775 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1776 1777 /* don't print speed if the drive reported 0 */ 1778 if (cd->max_speed) 1779 printk(KERN_CONT " %dX", cd->max_speed); 1780 1781 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1782 1783 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1784 printk(KERN_CONT " DVD%s%s", 1785 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1786 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1787 1788 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1789 printk(KERN_CONT " CD%s%s", 1790 (cdi->mask & CDC_CD_R) ? "" : "-R", 1791 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1792 1793 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1794 printk(KERN_CONT " changer w/%d slots", nslots); 1795 else 1796 printk(KERN_CONT " drive"); 1797 1798 printk(KERN_CONT ", %dkB Cache\n", 1799 be16_to_cpup((__be16 *)&buf[8 + 12])); 1800 1801 return nslots; 1802} 1803 1804/* standard prep_rq_fn that builds 10 byte cmds */ 1805static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1806{ 1807 int hard_sect = queue_hardsect_size(q); 1808 long block = (long)rq->hard_sector / (hard_sect >> 9); 1809 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1810 1811 memset(rq->cmd, 0, BLK_MAX_CDB); 1812 1813 if (rq_data_dir(rq) == READ) 1814 rq->cmd[0] = GPCMD_READ_10; 1815 else 1816 rq->cmd[0] = GPCMD_WRITE_10; 1817 1818 /* 1819 * fill in lba 1820 */ 1821 rq->cmd[2] = (block >> 24) & 0xff; 1822 rq->cmd[3] = (block >> 16) & 0xff; 1823 rq->cmd[4] = (block >> 8) & 0xff; 1824 rq->cmd[5] = block & 0xff; 1825 1826 /* 1827 * and transfer length 1828 */ 1829 rq->cmd[7] = (blocks >> 8) & 0xff; 1830 rq->cmd[8] = blocks & 0xff; 1831 rq->cmd_len = 10; 1832 return BLKPREP_OK; 1833} 1834 1835/* 1836 * Most of the SCSI commands are supported directly by ATAPI devices. 1837 * This transform handles the few exceptions. 1838 */ 1839static int ide_cdrom_prep_pc(struct request *rq) 1840{ 1841 u8 *c = rq->cmd; 1842 1843 /* transform 6-byte read/write commands to the 10-byte version */ 1844 if (c[0] == READ_6 || c[0] == WRITE_6) { 1845 c[8] = c[4]; 1846 c[5] = c[3]; 1847 c[4] = c[2]; 1848 c[3] = c[1] & 0x1f; 1849 c[2] = 0; 1850 c[1] &= 0xe0; 1851 c[0] += (READ_10 - READ_6); 1852 rq->cmd_len = 10; 1853 return BLKPREP_OK; 1854 } 1855 1856 /* 1857 * it's silly to pretend we understand 6-byte sense commands, just 1858 * reject with ILLEGAL_REQUEST and the caller should take the 1859 * appropriate action 1860 */ 1861 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1862 rq->errors = ILLEGAL_REQUEST; 1863 return BLKPREP_KILL; 1864 } 1865 1866 return BLKPREP_OK; 1867} 1868 1869static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1870{ 1871 if (blk_fs_request(rq)) 1872 return ide_cdrom_prep_fs(q, rq); 1873 else if (blk_pc_request(rq)) 1874 return ide_cdrom_prep_pc(rq); 1875 1876 return 0; 1877} 1878 1879struct cd_list_entry { 1880 const char *id_model; 1881 const char *id_firmware; 1882 unsigned int cd_flags; 1883}; 1884 1885#ifdef CONFIG_IDE_PROC_FS 1886static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1887{ 1888 unsigned long capacity, sectors_per_frame; 1889 1890 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1891 return 0; 1892 1893 return capacity * sectors_per_frame; 1894} 1895 1896static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1897 int count, int *eof, void *data) 1898{ 1899 ide_drive_t *drive = data; 1900 int len; 1901 1902 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1903 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1904} 1905 1906static ide_proc_entry_t idecd_proc[] = { 1907 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1908 { NULL, 0, NULL, NULL } 1909}; 1910 1911ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP); 1912 1913static const struct ide_proc_devset idecd_settings[] = { 1914 IDE_PROC_DEVSET(dsc_overlap, 0, 1), 1915 { 0 }, 1916}; 1917 1918static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1919{ 1920 return idecd_proc; 1921} 1922 1923static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1924{ 1925 return idecd_settings; 1926} 1927#endif 1928 1929static const struct cd_list_entry ide_cd_quirks_list[] = { 1930 /* Limit transfer size per interrupt. */ 1931 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1932 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1933 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1934 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1935 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1936 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1937 IDE_AFLAG_PRE_ATAPI12, }, 1938 /* Vertos 300, some versions of this drive like to talk BCD. */ 1939 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1940 /* Vertos 600 ESD. */ 1941 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1942 /* 1943 * Sanyo 3 CD changer uses a non-standard command for CD changing 1944 * (by default standard ATAPI support for CD changers is used). 1945 */ 1946 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1947 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1948 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1949 /* Stingray 8X CD-ROM. */ 1950 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1951 /* 1952 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1953 * mode sense page capabilities size, but older drives break. 1954 */ 1955 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1956 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1957 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1958 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1959 /* 1960 * Some drives used by Apple don't advertise audio play 1961 * but they do support reading TOC & audio datas. 1962 */ 1963 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1964 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1965 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1966 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1967 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1968 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1969 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1970 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1971 { NULL, NULL, 0 } 1972}; 1973 1974static unsigned int ide_cd_flags(u16 *id) 1975{ 1976 const struct cd_list_entry *cle = ide_cd_quirks_list; 1977 1978 while (cle->id_model) { 1979 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1980 (cle->id_firmware == NULL || 1981 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1982 return cle->cd_flags; 1983 cle++; 1984 } 1985 1986 return 0; 1987} 1988 1989static int ide_cdrom_setup(ide_drive_t *drive) 1990{ 1991 struct cdrom_info *cd = drive->driver_data; 1992 struct cdrom_device_info *cdi = &cd->devinfo; 1993 u16 *id = drive->id; 1994 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1995 int nslots; 1996 1997 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__); 1998 1999 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 2000 blk_queue_dma_alignment(drive->queue, 31); 2001 blk_queue_update_dma_pad(drive->queue, 15); 2002 drive->queue->unplug_delay = (1 * HZ) / 1000; 2003 if (!drive->queue->unplug_delay) 2004 drive->queue->unplug_delay = 1; 2005 2006 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 2007 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 2008 2009 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 2010 fw_rev[4] == '1' && fw_rev[6] <= '2') 2011 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 2012 IDE_AFLAG_TOCADDR_AS_BCD); 2013 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 2014 fw_rev[4] == '1' && fw_rev[6] <= '2') 2015 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 2016 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 2017 /* 3 => use CD in slot 0 */ 2018 cdi->sanyo_slot = 3; 2019 2020 nslots = ide_cdrom_probe_capabilities(drive); 2021 2022 /* set correct block size */ 2023 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 2024 2025 if (drive->next != drive) 2026 drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP; 2027 else 2028 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; 2029 2030 if (ide_cdrom_register(drive, nslots)) { 2031 printk(KERN_ERR PFX "%s: %s failed to register device with the" 2032 " cdrom driver.\n", drive->name, __func__); 2033 cd->devinfo.handle = NULL; 2034 return 1; 2035 } 2036 2037 ide_proc_register_driver(drive, cd->driver); 2038 return 0; 2039} 2040 2041static void ide_cd_remove(ide_drive_t *drive) 2042{ 2043 struct cdrom_info *info = drive->driver_data; 2044 2045 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 2046 2047 ide_proc_unregister_driver(drive, info->driver); 2048 2049 del_gendisk(info->disk); 2050 2051 ide_cd_put(info); 2052} 2053 2054static void ide_cd_release(struct kref *kref) 2055{ 2056 struct cdrom_info *info = to_ide_drv(kref, cdrom_info); 2057 struct cdrom_device_info *devinfo = &info->devinfo; 2058 ide_drive_t *drive = info->drive; 2059 struct gendisk *g = info->disk; 2060 2061 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 2062 2063 kfree(info->toc); 2064 if (devinfo->handle == drive) 2065 unregister_cdrom(devinfo); 2066 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; 2067 drive->driver_data = NULL; 2068 blk_queue_prep_rq(drive->queue, NULL); 2069 g->private_data = NULL; 2070 put_disk(g); 2071 kfree(info); 2072} 2073 2074static int ide_cd_probe(ide_drive_t *); 2075 2076static ide_driver_t ide_cdrom_driver = { 2077 .gen_driver = { 2078 .owner = THIS_MODULE, 2079 .name = "ide-cdrom", 2080 .bus = &ide_bus_type, 2081 }, 2082 .probe = ide_cd_probe, 2083 .remove = ide_cd_remove, 2084 .version = IDECD_VERSION, 2085 .do_request = ide_cd_do_request, 2086 .end_request = ide_end_request, 2087 .error = __ide_error, 2088#ifdef CONFIG_IDE_PROC_FS 2089 .proc_entries = ide_cd_proc_entries, 2090 .proc_devsets = ide_cd_proc_devsets, 2091#endif 2092}; 2093 2094static int idecd_open(struct block_device *bdev, fmode_t mode) 2095{ 2096 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 2097 int rc = -ENOMEM; 2098 2099 if (!info) 2100 return -ENXIO; 2101 2102 rc = cdrom_open(&info->devinfo, bdev, mode); 2103 2104 if (rc < 0) 2105 ide_cd_put(info); 2106 2107 return rc; 2108} 2109 2110static int idecd_release(struct gendisk *disk, fmode_t mode) 2111{ 2112 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2113 2114 cdrom_release(&info->devinfo, mode); 2115 2116 ide_cd_put(info); 2117 2118 return 0; 2119} 2120 2121static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2122{ 2123 struct packet_command cgc; 2124 char buffer[16]; 2125 int stat; 2126 char spindown; 2127 2128 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 2129 return -EFAULT; 2130 2131 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2132 2133 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2134 if (stat) 2135 return stat; 2136 2137 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 2138 return cdrom_mode_select(cdi, &cgc); 2139} 2140 2141static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2142{ 2143 struct packet_command cgc; 2144 char buffer[16]; 2145 int stat; 2146 char spindown; 2147 2148 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2149 2150 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2151 if (stat) 2152 return stat; 2153 2154 spindown = buffer[11] & 0x0f; 2155 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2156 return -EFAULT; 2157 return 0; 2158} 2159 2160static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 2161 unsigned int cmd, unsigned long arg) 2162{ 2163 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 2164 int err; 2165 2166 switch (cmd) { 2167 case CDROMSETSPINDOWN: 2168 return idecd_set_spindown(&info->devinfo, arg); 2169 case CDROMGETSPINDOWN: 2170 return idecd_get_spindown(&info->devinfo, arg); 2171 default: 2172 break; 2173 } 2174 2175 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 2176 if (err == -EINVAL) 2177 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 2178 2179 return err; 2180} 2181 2182static int idecd_media_changed(struct gendisk *disk) 2183{ 2184 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2185 return cdrom_media_changed(&info->devinfo); 2186} 2187 2188static int idecd_revalidate_disk(struct gendisk *disk) 2189{ 2190 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2191 struct request_sense sense; 2192 2193 ide_cd_read_toc(info->drive, &sense); 2194 2195 return 0; 2196} 2197 2198static struct block_device_operations idecd_ops = { 2199 .owner = THIS_MODULE, 2200 .open = idecd_open, 2201 .release = idecd_release, 2202 .locked_ioctl = idecd_ioctl, 2203 .media_changed = idecd_media_changed, 2204 .revalidate_disk = idecd_revalidate_disk 2205}; 2206 2207/* module options */ 2208static char *ignore; 2209module_param(ignore, charp, 0400); 2210 2211static unsigned long debug_mask; 2212module_param(debug_mask, ulong, 0644); 2213 2214MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2215 2216static int ide_cd_probe(ide_drive_t *drive) 2217{ 2218 struct cdrom_info *info; 2219 struct gendisk *g; 2220 struct request_sense sense; 2221 2222 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, " 2223 "drive->media: 0x%x\n", __func__, drive->driver_req, 2224 drive->media); 2225 2226 if (!strstr("ide-cdrom", drive->driver_req)) 2227 goto failed; 2228 2229 if (drive->media != ide_cdrom && drive->media != ide_optical) 2230 goto failed; 2231 2232 /* skip drives that we were told to ignore */ 2233 if (ignore != NULL) { 2234 if (strstr(ignore, drive->name)) { 2235 printk(KERN_INFO PFX "ignoring drive %s\n", 2236 drive->name); 2237 goto failed; 2238 } 2239 } 2240 2241 drive->debug_mask = debug_mask; 2242 2243 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2244 if (info == NULL) { 2245 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 2246 drive->name); 2247 goto failed; 2248 } 2249 2250 g = alloc_disk(1 << PARTN_BITS); 2251 if (!g) 2252 goto out_free_cd; 2253 2254 ide_init_disk(g, drive); 2255 2256 kref_init(&info->kref); 2257 2258 info->drive = drive; 2259 info->driver = &ide_cdrom_driver; 2260 info->disk = g; 2261 2262 g->private_data = &info->driver; 2263 2264 drive->driver_data = info; 2265 2266 g->minors = 1; 2267 g->driverfs_dev = &drive->gendev; 2268 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2269 if (ide_cdrom_setup(drive)) { 2270 ide_cd_release(&info->kref); 2271 goto failed; 2272 } 2273 2274 ide_cd_read_toc(drive, &sense); 2275 g->fops = &idecd_ops; 2276 g->flags |= GENHD_FL_REMOVABLE; 2277 add_disk(g); 2278 return 0; 2279 2280out_free_cd: 2281 kfree(info); 2282failed: 2283 return -ENODEV; 2284} 2285 2286static void __exit ide_cdrom_exit(void) 2287{ 2288 driver_unregister(&ide_cdrom_driver.gen_driver); 2289} 2290 2291static int __init ide_cdrom_init(void) 2292{ 2293 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2294 return driver_register(&ide_cdrom_driver.gen_driver); 2295} 2296 2297MODULE_ALIAS("ide:*m-cdrom*"); 2298MODULE_ALIAS("ide-cd"); 2299module_init(ide_cdrom_init); 2300module_exit(ide_cdrom_exit); 2301MODULE_LICENSE("GPL"); 2302