git.oblomov.eu Git - linux-2.6/blob - drivers/ide/ide-cd_ioctl.c

   1 /*
   2  * cdrom.c IOCTLs handling for ide-cd 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  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/cdrom.h>
  11 #include <linux/ide.h>
  12 #include <scsi/scsi.h>
  13
  14 #include "ide-cd.h"
  15
  16 /****************************************************************************
  17  * Other driver requests (open, close, check media change).
  18  */
  19 int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
  20 {
  21         return 0;
  22 }
  23
  24 /*
  25  * Close down the device.  Invalidate all cached blocks.
  26  */
  27 void ide_cdrom_release_real(struct cdrom_device_info *cdi)
  28 {
  29         ide_drive_t *drive = cdi->handle;
  30         struct cdrom_info *cd = drive->driver_data;
  31
  32         if (!cdi->use_count)
  33                 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
  34 }
  35
  36 /*
  37  * add logic to try GET_EVENT command first to check for media and tray
  38  * status. this should be supported by newer cd-r/w and all DVD etc
  39  * drives
  40  */
  41 int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
  42 {
  43         ide_drive_t *drive = cdi->handle;
  44         struct media_event_desc med;
  45         struct request_sense sense;
  46         int stat;
  47
  48         if (slot_nr != CDSL_CURRENT)
  49                 return -EINVAL;
  50
  51         stat = cdrom_check_status(drive, &sense);
  52         if (!stat || sense.sense_key == UNIT_ATTENTION)
  53                 return CDS_DISC_OK;
  54
  55         if (!cdrom_get_media_event(cdi, &med)) {
  56                 if (med.media_present)
  57                         return CDS_DISC_OK;
  58                 else if (med.door_open)
  59                         return CDS_TRAY_OPEN;
  60                 else
  61                         return CDS_NO_DISC;
  62         }
  63
  64         if (sense.sense_key == NOT_READY && sense.asc == 0x04
  65                         && sense.ascq == 0x04)
  66                 return CDS_DISC_OK;
  67
  68         /*
  69          * If not using Mt Fuji extended media tray reports,
  70          * just return TRAY_OPEN since ATAPI doesn't provide
  71          * any other way to detect this...
  72          */
  73         if (sense.sense_key == NOT_READY) {
  74                 if (sense.asc == 0x3a && sense.ascq == 1)
  75                         return CDS_NO_DISC;
  76                 else
  77                         return CDS_TRAY_OPEN;
  78         }
  79         return CDS_DRIVE_NOT_READY;
  80 }
  81
  82 int ide_cdrom_check_media_change_real(struct cdrom_device_info *cdi,
  83                                        int slot_nr)
  84 {
  85         ide_drive_t *drive = cdi->handle;
  86         struct cdrom_info *cd = drive->driver_data;
  87         int retval;
  88
  89         if (slot_nr == CDSL_CURRENT) {
  90                 (void) cdrom_check_status(drive, NULL);
  91                 retval = (cd->cd_flags & IDE_CD_FLAG_MEDIA_CHANGED) ? 1 : 0;
  92                 cd->cd_flags &= ~IDE_CD_FLAG_MEDIA_CHANGED;
  93                 return retval;
  94         } else {
  95                 return -EINVAL;
  96         }
  97 }
  98
  99 /* Eject the disk if EJECTFLAG is 0.
 100    If EJECTFLAG is 1, try to reload the disk. */
 101 static
 102 int cdrom_eject(ide_drive_t *drive, int ejectflag,
 103                 struct request_sense *sense)
 104 {
 105         struct cdrom_info *cd = drive->driver_data;
 106         struct cdrom_device_info *cdi = &cd->devinfo;
 107         struct request req;
 108         char loej = 0x02;
 109
 110         if ((cd->cd_flags & IDE_CD_FLAG_NO_EJECT) && !ejectflag)
 111                 return -EDRIVE_CANT_DO_THIS;
 112
 113         /* reload fails on some drives, if the tray is locked */
 114         if ((cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED) && ejectflag)
 115                 return 0;
 116
 117         ide_cd_init_rq(drive, &req);
 118
 119         /* only tell drive to close tray if open, if it can do that */
 120         if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
 121                 loej = 0;
 122
 123         req.sense = sense;
 124         req.cmd[0] = GPCMD_START_STOP_UNIT;
 125         req.cmd[4] = loej | (ejectflag != 0);
 126
 127         return ide_cd_queue_pc(drive, &req);
 128 }
 129
 130 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
 131 static
 132 int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
 133                     struct request_sense *sense)
 134 {
 135         struct cdrom_info *cd = drive->driver_data;
 136         struct request_sense my_sense;
 137         struct request req;
 138         int stat;
 139
 140         if (sense == NULL)
 141                 sense = &my_sense;
 142
 143         /* If the drive cannot lock the door, just pretend. */
 144         if (cd->cd_flags & IDE_CD_FLAG_NO_DOORLOCK) {
 145                 stat = 0;
 146         } else {
 147                 ide_cd_init_rq(drive, &req);
 148                 req.sense = sense;
 149                 req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 150                 req.cmd[4] = lockflag ? 1 : 0;
 151                 stat = ide_cd_queue_pc(drive, &req);
 152         }
 153
 154         /* If we got an illegal field error, the drive
 155            probably cannot lock the door. */
 156         if (stat != 0 &&
 157             sense->sense_key == ILLEGAL_REQUEST &&
 158             (sense->asc == 0x24 || sense->asc == 0x20)) {
 159                 printk(KERN_ERR "%s: door locking not supported\n",
 160                         drive->name);
 161                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
 162                 stat = 0;
 163         }
 164
 165         /* no medium, that's alright. */
 166         if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
 167                 stat = 0;
 168
 169         if (stat == 0) {
 170                 if (lockflag)
 171                         cd->cd_flags |= IDE_CD_FLAG_DOOR_LOCKED;
 172                 else
 173                         cd->cd_flags &= ~IDE_CD_FLAG_DOOR_LOCKED;
 174         }
 175
 176         return stat;
 177 }
 178
 179 int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
 180 {
 181         ide_drive_t *drive = cdi->handle;
 182         struct request_sense sense;
 183
 184         if (position) {
 185                 int stat = ide_cd_lockdoor(drive, 0, &sense);
 186
 187                 if (stat)
 188                         return stat;
 189         }
 190
 191         return cdrom_eject(drive, !position, &sense);
 192 }
 193
 194 int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
 195 {
 196         ide_drive_t *drive = cdi->handle;
 197
 198         return ide_cd_lockdoor(drive, lock, NULL);
 199 }
 200
 201 /*
 202  * ATAPI devices are free to select the speed you request or any slower
 203  * rate. :-(  Requesting too fast a speed will _not_ produce an error.
 204  */
 205 int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
 206 {
 207         ide_drive_t *drive = cdi->handle;
 208         struct cdrom_info *cd = drive->driver_data;
 209         struct request rq;
 210         struct request_sense sense;
 211         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
 212         int stat;
 213
 214         ide_cd_init_rq(drive, &rq);
 215
 216         rq.sense = &sense;
 217
 218         if (speed == 0)
 219                 speed = 0xffff; /* set to max */
 220         else
 221                 speed *= 177;   /* Nx to kbytes/s */
 222
 223         rq.cmd[0] = GPCMD_SET_SPEED;
 224         /* Read Drive speed in kbytes/second MSB/LSB */
 225         rq.cmd[2] = (speed >> 8) & 0xff;
 226         rq.cmd[3] = speed & 0xff;
 227         if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
 228             (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
 229                 /* Write Drive speed in kbytes/second MSB/LSB */
 230                 rq.cmd[4] = (speed >> 8) & 0xff;
 231                 rq.cmd[5] = speed & 0xff;
 232         }
 233
 234         stat = ide_cd_queue_pc(drive, &rq);
 235
 236         if (!ide_cdrom_get_capabilities(drive, buf)) {
 237                 ide_cdrom_update_speed(drive, buf);
 238                 cdi->speed = cd->current_speed;
 239         }
 240
 241         return 0;
 242 }
 243
 244 int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
 245                                struct cdrom_multisession *ms_info)
 246 {
 247         struct atapi_toc *toc;
 248         ide_drive_t *drive = cdi->handle;
 249         struct cdrom_info *info = drive->driver_data;
 250         struct request_sense sense;
 251         int ret;
 252
 253         if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0 || !info->toc) {
 254                 ret = ide_cd_read_toc(drive, &sense);
 255                 if (ret)
 256                         return ret;
 257         }
 258
 259         toc = info->toc;
 260         ms_info->addr.lba = toc->last_session_lba;
 261         ms_info->xa_flag = toc->xa_flag;
 262
 263         return 0;
 264 }
 265
 266 int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
 267                       struct cdrom_mcn *mcn_info)
 268 {
 269         ide_drive_t *drive = cdi->handle;
 270         int stat, mcnlen;
 271         struct request rq;
 272         char buf[24];
 273
 274         ide_cd_init_rq(drive, &rq);
 275
 276         rq.data = buf;
 277         rq.data_len = sizeof(buf);
 278
 279         rq.cmd[0] = GPCMD_READ_SUBCHANNEL;
 280         rq.cmd[1] = 2;          /* MSF addressing */
 281         rq.cmd[2] = 0x40;       /* request subQ data */
 282         rq.cmd[3] = 2;          /* format */
 283         rq.cmd[8] = sizeof(buf);
 284
 285         stat = ide_cd_queue_pc(drive, &rq);
 286         if (stat)
 287                 return stat;
 288
 289         mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
 290         memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
 291         mcn_info->medium_catalog_number[mcnlen] = '\0';
 292
 293         return 0;
 294 }
 295
 296 int ide_cdrom_reset(struct cdrom_device_info *cdi)
 297 {
 298         ide_drive_t *drive = cdi->handle;
 299         struct cdrom_info *cd = drive->driver_data;
 300         struct request_sense sense;
 301         struct request req;
 302         int ret;
 303
 304         ide_cd_init_rq(drive, &req);
 305         req.cmd_type = REQ_TYPE_SPECIAL;
 306         req.cmd_flags = REQ_QUIET;
 307         ret = ide_do_drive_cmd(drive, &req, ide_wait);
 308
 309         /*
 310          * A reset will unlock the door. If it was previously locked,
 311          * lock it again.
 312          */
 313         if (cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED)
 314                 (void)ide_cd_lockdoor(drive, 1, &sense);
 315
 316         return ret;
 317 }
 318
 319 static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
 320                                 struct atapi_toc_entry **ent)
 321 {
 322         struct cdrom_info *info = drive->driver_data;
 323         struct atapi_toc *toc = info->toc;
 324         int ntracks;
 325
 326         /*
 327          * don't serve cached data, if the toc isn't valid
 328          */
 329         if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0)
 330                 return -EINVAL;
 331
 332         /* Check validity of requested track number. */
 333         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
 334
 335         if (toc->hdr.first_track == CDROM_LEADOUT)
 336                 ntracks = 0;
 337
 338         if (track == CDROM_LEADOUT)
 339                 *ent = &toc->ent[ntracks];
 340         else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
 341                 return -EINVAL;
 342         else
 343                 *ent = &toc->ent[track - toc->hdr.first_track];
 344
 345         return 0;
 346 }
 347
 348 static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
 349 {
 350         struct cdrom_ti *ti = arg;
 351         struct atapi_toc_entry *first_toc, *last_toc;
 352         unsigned long lba_start, lba_end;
 353         int stat;
 354         struct request rq;
 355         struct request_sense sense;
 356
 357         stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
 358         if (stat)
 359                 return stat;
 360
 361         stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
 362         if (stat)
 363                 return stat;
 364
 365         if (ti->cdti_trk1 != CDROM_LEADOUT)
 366                 ++last_toc;
 367         lba_start = first_toc->addr.lba;
 368         lba_end   = last_toc->addr.lba;
 369
 370         if (lba_end <= lba_start)
 371                 return -EINVAL;
 372
 373         ide_cd_init_rq(drive, &rq);
 374
 375         rq.sense = &sense;
 376         rq.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
 377         lba_to_msf(lba_start,   &rq.cmd[3], &rq.cmd[4], &rq.cmd[5]);
 378         lba_to_msf(lba_end - 1, &rq.cmd[6], &rq.cmd[7], &rq.cmd[8]);
 379
 380         return ide_cd_queue_pc(drive, &rq);
 381 }
 382
 383 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
 384 {
 385         struct cdrom_info *cd = drive->driver_data;
 386         struct cdrom_tochdr *tochdr = arg;
 387         struct atapi_toc *toc;
 388         int stat;
 389
 390         /* Make sure our saved TOC is valid. */
 391         stat = ide_cd_read_toc(drive, NULL);
 392         if (stat)
 393                 return stat;
 394
 395         toc = cd->toc;
 396         tochdr->cdth_trk0 = toc->hdr.first_track;
 397         tochdr->cdth_trk1 = toc->hdr.last_track;
 398
 399         return 0;
 400 }
 401
 402 static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
 403 {
 404         struct cdrom_tocentry *tocentry = arg;
 405         struct atapi_toc_entry *toce;
 406         int stat;
 407
 408         stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
 409         if (stat)
 410                 return stat;
 411
 412         tocentry->cdte_ctrl = toce->control;
 413         tocentry->cdte_adr  = toce->adr;
 414         if (tocentry->cdte_format == CDROM_MSF) {
 415                 lba_to_msf(toce->addr.lba,
 416                            &tocentry->cdte_addr.msf.minute,
 417                            &tocentry->cdte_addr.msf.second,
 418                            &tocentry->cdte_addr.msf.frame);
 419         } else
 420                 tocentry->cdte_addr.lba = toce->addr.lba;
 421
 422         return 0;
 423 }
 424
 425 int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
 426                           unsigned int cmd, void *arg)
 427 {
 428         ide_drive_t *drive = cdi->handle;
 429
 430         switch (cmd) {
 431         /*
 432          * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
 433          * atapi doesn't support it
 434          */
 435         case CDROMPLAYTRKIND:
 436                 return ide_cd_fake_play_trkind(drive, arg);
 437         case CDROMREADTOCHDR:
 438                 return ide_cd_read_tochdr(drive, arg);
 439         case CDROMREADTOCENTRY:
 440                 return ide_cd_read_tocentry(drive, arg);
 441         default:
 442                 return -EINVAL;
 443         }
 444 }
 445
 446 /* the generic packet interface to cdrom.c */
 447 int ide_cdrom_packet(struct cdrom_device_info *cdi,
 448                             struct packet_command *cgc)
 449 {
 450         struct request req;
 451         ide_drive_t *drive = cdi->handle;
 452
 453         if (cgc->timeout <= 0)
 454                 cgc->timeout = ATAPI_WAIT_PC;
 455
 456         /* here we queue the commands from the uniform CD-ROM
 457            layer. the packet must be complete, as we do not
 458            touch it at all. */
 459         ide_cd_init_rq(drive, &req);
 460         memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
 461         if (cgc->sense)
 462                 memset(cgc->sense, 0, sizeof(struct request_sense));
 463         req.data = cgc->buffer;
 464         req.data_len = cgc->buflen;
 465         req.timeout = cgc->timeout;
 466
 467         if (cgc->quiet)
 468                 req.cmd_flags |= REQ_QUIET;
 469
 470         req.sense = cgc->sense;
 471         cgc->stat = ide_cd_queue_pc(drive, &req);
 472         if (!cgc->stat)
 473                 cgc->buflen -= req.data_len;
 474         return cgc->stat;
 475 }