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         char loej = 0x02;
 108         unsigned char cmd[BLK_MAX_CDB];
 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         /* only tell drive to close tray if open, if it can do that */
 118         if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
 119                 loej = 0;
 120
 121         memset(cmd, 0, BLK_MAX_CDB);
 122
 123         cmd[0] = GPCMD_START_STOP_UNIT;
 124         cmd[4] = loej | (ejectflag != 0);
 125
 126         return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, sense, 0, 0);
 127 }
 128
 129 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
 130 static
 131 int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
 132                     struct request_sense *sense)
 133 {
 134         struct cdrom_info *cd = drive->driver_data;
 135         struct request_sense my_sense;
 136         int stat;
 137
 138         if (sense == NULL)
 139                 sense = &my_sense;
 140
 141         /* If the drive cannot lock the door, just pretend. */
 142         if (cd->cd_flags & IDE_CD_FLAG_NO_DOORLOCK) {
 143                 stat = 0;
 144         } else {
 145                 unsigned char cmd[BLK_MAX_CDB];
 146
 147                 memset(cmd, 0, BLK_MAX_CDB);
 148
 149                 cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 150                 cmd[4] = lockflag ? 1 : 0;
 151
 152                 stat = ide_cd_queue_pc(drive, cmd, 0, NULL, 0,
 153                                        sense, 0, 0);
 154         }
 155
 156         /* If we got an illegal field error, the drive
 157            probably cannot lock the door. */
 158         if (stat != 0 &&
 159             sense->sense_key == ILLEGAL_REQUEST &&
 160             (sense->asc == 0x24 || sense->asc == 0x20)) {
 161                 printk(KERN_ERR "%s: door locking not supported\n",
 162                         drive->name);
 163                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
 164                 stat = 0;
 165         }
 166
 167         /* no medium, that's alright. */
 168         if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
 169                 stat = 0;
 170
 171         if (stat == 0) {
 172                 if (lockflag)
 173                         cd->cd_flags |= IDE_CD_FLAG_DOOR_LOCKED;
 174                 else
 175                         cd->cd_flags &= ~IDE_CD_FLAG_DOOR_LOCKED;
 176         }
 177
 178         return stat;
 179 }
 180
 181 int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
 182 {
 183         ide_drive_t *drive = cdi->handle;
 184         struct request_sense sense;
 185
 186         if (position) {
 187                 int stat = ide_cd_lockdoor(drive, 0, &sense);
 188
 189                 if (stat)
 190                         return stat;
 191         }
 192
 193         return cdrom_eject(drive, !position, &sense);
 194 }
 195
 196 int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
 197 {
 198         ide_drive_t *drive = cdi->handle;
 199
 200         return ide_cd_lockdoor(drive, lock, NULL);
 201 }
 202
 203 /*
 204  * ATAPI devices are free to select the speed you request or any slower
 205  * rate. :-(  Requesting too fast a speed will _not_ produce an error.
 206  */
 207 int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
 208 {
 209         ide_drive_t *drive = cdi->handle;
 210         struct cdrom_info *cd = drive->driver_data;
 211         struct request_sense sense;
 212         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
 213         int stat;
 214         unsigned char cmd[BLK_MAX_CDB];
 215
 216         if (speed == 0)
 217                 speed = 0xffff; /* set to max */
 218         else
 219                 speed *= 177;   /* Nx to kbytes/s */
 220
 221         memset(cmd, 0, BLK_MAX_CDB);
 222
 223         cmd[0] = GPCMD_SET_SPEED;
 224         /* Read Drive speed in kbytes/second MSB/LSB */
 225         cmd[2] = (speed >> 8) & 0xff;
 226         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                 cmd[4] = (speed >> 8) & 0xff;
 231                 cmd[5] = speed & 0xff;
 232         }
 233
 234         stat = ide_cd_queue_pc(drive, cmd, 0, NULL, 0, &sense, 0, 0);
 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         char buf[24];
 272         unsigned char cmd[BLK_MAX_CDB];
 273         unsigned len = sizeof(buf);
 274
 275         memset(cmd, 0, BLK_MAX_CDB);
 276
 277         cmd[0] = GPCMD_READ_SUBCHANNEL;
 278         cmd[1] = 2;             /* MSF addressing */
 279         cmd[2] = 0x40;  /* request subQ data */
 280         cmd[3] = 2;             /* format */
 281         cmd[8] = len;
 282
 283         stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
 284         if (stat)
 285                 return stat;
 286
 287         mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
 288         memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
 289         mcn_info->medium_catalog_number[mcnlen] = '\0';
 290
 291         return 0;
 292 }
 293
 294 int ide_cdrom_reset(struct cdrom_device_info *cdi)
 295 {
 296         ide_drive_t *drive = cdi->handle;
 297         struct cdrom_info *cd = drive->driver_data;
 298         struct request_sense sense;
 299         struct request *rq;
 300         int ret;
 301
 302         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 303         rq->cmd_type = REQ_TYPE_SPECIAL;
 304         rq->cmd_flags = REQ_QUIET;
 305         ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
 306         blk_put_request(rq);
 307         /*
 308          * A reset will unlock the door. If it was previously locked,
 309          * lock it again.
 310          */
 311         if (cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED)
 312                 (void)ide_cd_lockdoor(drive, 1, &sense);
 313
 314         return ret;
 315 }
 316
 317 static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
 318                                 struct atapi_toc_entry **ent)
 319 {
 320         struct cdrom_info *info = drive->driver_data;
 321         struct atapi_toc *toc = info->toc;
 322         int ntracks;
 323
 324         /*
 325          * don't serve cached data, if the toc isn't valid
 326          */
 327         if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0)
 328                 return -EINVAL;
 329
 330         /* Check validity of requested track number. */
 331         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
 332
 333         if (toc->hdr.first_track == CDROM_LEADOUT)
 334                 ntracks = 0;
 335
 336         if (track == CDROM_LEADOUT)
 337                 *ent = &toc->ent[ntracks];
 338         else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
 339                 return -EINVAL;
 340         else
 341                 *ent = &toc->ent[track - toc->hdr.first_track];
 342
 343         return 0;
 344 }
 345
 346 static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
 347 {
 348         struct cdrom_ti *ti = arg;
 349         struct atapi_toc_entry *first_toc, *last_toc;
 350         unsigned long lba_start, lba_end;
 351         int stat;
 352         struct request_sense sense;
 353         unsigned char cmd[BLK_MAX_CDB];
 354
 355         stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
 356         if (stat)
 357                 return stat;
 358
 359         stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
 360         if (stat)
 361                 return stat;
 362
 363         if (ti->cdti_trk1 != CDROM_LEADOUT)
 364                 ++last_toc;
 365         lba_start = first_toc->addr.lba;
 366         lba_end   = last_toc->addr.lba;
 367
 368         if (lba_end <= lba_start)
 369                 return -EINVAL;
 370
 371         memset(cmd, 0, BLK_MAX_CDB);
 372
 373         cmd[0] = GPCMD_PLAY_AUDIO_MSF;
 374         lba_to_msf(lba_start,   &cmd[3], &cmd[4], &cmd[5]);
 375         lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
 376
 377         return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, &sense, 0, 0);
 378 }
 379
 380 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
 381 {
 382         struct cdrom_info *cd = drive->driver_data;
 383         struct cdrom_tochdr *tochdr = arg;
 384         struct atapi_toc *toc;
 385         int stat;
 386
 387         /* Make sure our saved TOC is valid. */
 388         stat = ide_cd_read_toc(drive, NULL);
 389         if (stat)
 390                 return stat;
 391
 392         toc = cd->toc;
 393         tochdr->cdth_trk0 = toc->hdr.first_track;
 394         tochdr->cdth_trk1 = toc->hdr.last_track;
 395
 396         return 0;
 397 }
 398
 399 static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
 400 {
 401         struct cdrom_tocentry *tocentry = arg;
 402         struct atapi_toc_entry *toce;
 403         int stat;
 404
 405         stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
 406         if (stat)
 407                 return stat;
 408
 409         tocentry->cdte_ctrl = toce->control;
 410         tocentry->cdte_adr  = toce->adr;
 411         if (tocentry->cdte_format == CDROM_MSF) {
 412                 lba_to_msf(toce->addr.lba,
 413                            &tocentry->cdte_addr.msf.minute,
 414                            &tocentry->cdte_addr.msf.second,
 415                            &tocentry->cdte_addr.msf.frame);
 416         } else
 417                 tocentry->cdte_addr.lba = toce->addr.lba;
 418
 419         return 0;
 420 }
 421
 422 int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
 423                           unsigned int cmd, void *arg)
 424 {
 425         ide_drive_t *drive = cdi->handle;
 426
 427         switch (cmd) {
 428         /*
 429          * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
 430          * atapi doesn't support it
 431          */
 432         case CDROMPLAYTRKIND:
 433                 return ide_cd_fake_play_trkind(drive, arg);
 434         case CDROMREADTOCHDR:
 435                 return ide_cd_read_tochdr(drive, arg);
 436         case CDROMREADTOCENTRY:
 437                 return ide_cd_read_tocentry(drive, arg);
 438         default:
 439                 return -EINVAL;
 440         }
 441 }
 442
 443 /* the generic packet interface to cdrom.c */
 444 int ide_cdrom_packet(struct cdrom_device_info *cdi,
 445                             struct packet_command *cgc)
 446 {
 447         ide_drive_t *drive = cdi->handle;
 448         unsigned int flags = 0;
 449         unsigned len = cgc->buflen;
 450
 451         if (cgc->timeout <= 0)
 452                 cgc->timeout = ATAPI_WAIT_PC;
 453
 454         /* here we queue the commands from the uniform CD-ROM
 455            layer. the packet must be complete, as we do not
 456            touch it at all. */
 457
 458         if (cgc->data_direction == CGC_DATA_WRITE)
 459                 flags |= REQ_RW;
 460
 461         if (cgc->sense)
 462                 memset(cgc->sense, 0, sizeof(struct request_sense));
 463
 464         if (cgc->quiet)
 465                 flags |= REQ_QUIET;
 466
 467         cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
 468                                     cgc->data_direction == CGC_DATA_WRITE,
 469                                     cgc->buffer, &len,
 470                                     cgc->sense, cgc->timeout, flags);
 471         if (!cgc->stat)
 472                 cgc->buflen -= len;
 473         return cgc->stat;
 474 }