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
  13 #include "ide-cd.h"
  14
  15 int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
  16 {
  17         ide_drive_t *drive = cdi->handle;
  18
  19         return ide_cd_lockdoor(drive, lock, NULL);
  20 }
  21
  22 /*
  23  * ATAPI devices are free to select the speed you request or any slower
  24  * rate. :-(  Requesting too fast a speed will _not_ produce an error.
  25  */
  26 int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
  27 {
  28         ide_drive_t *drive = cdi->handle;
  29         struct cdrom_info *cd = drive->driver_data;
  30         struct request rq;
  31         struct request_sense sense;
  32         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
  33         int stat;
  34
  35         ide_cd_init_rq(drive, &rq);
  36
  37         rq.sense = &sense;
  38
  39         if (speed == 0)
  40                 speed = 0xffff; /* set to max */
  41         else
  42                 speed *= 177;   /* Nx to kbytes/s */
  43
  44         rq.cmd[0] = GPCMD_SET_SPEED;
  45         /* Read Drive speed in kbytes/second MSB/LSB */
  46         rq.cmd[2] = (speed >> 8) & 0xff;
  47         rq.cmd[3] = speed & 0xff;
  48         if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
  49             (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
  50                 /* Write Drive speed in kbytes/second MSB/LSB */
  51                 rq.cmd[4] = (speed >> 8) & 0xff;
  52                 rq.cmd[5] = speed & 0xff;
  53         }
  54
  55         stat = ide_cd_queue_pc(drive, &rq);
  56
  57         if (!ide_cdrom_get_capabilities(drive, buf)) {
  58                 ide_cdrom_update_speed(drive, buf);
  59                 cdi->speed = cd->current_speed;
  60         }
  61
  62         return 0;
  63 }
  64
  65 int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
  66                                struct cdrom_multisession *ms_info)
  67 {
  68         struct atapi_toc *toc;
  69         ide_drive_t *drive = cdi->handle;
  70         struct cdrom_info *info = drive->driver_data;
  71         struct request_sense sense;
  72         int ret;
  73
  74         if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0 || !info->toc) {
  75                 ret = ide_cd_read_toc(drive, &sense);
  76                 if (ret)
  77                         return ret;
  78         }
  79
  80         toc = info->toc;
  81         ms_info->addr.lba = toc->last_session_lba;
  82         ms_info->xa_flag = toc->xa_flag;
  83
  84         return 0;
  85 }
  86
  87 int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
  88                       struct cdrom_mcn *mcn_info)
  89 {
  90         ide_drive_t *drive = cdi->handle;
  91         int stat, mcnlen;
  92         struct request rq;
  93         char buf[24];
  94
  95         ide_cd_init_rq(drive, &rq);
  96
  97         rq.data = buf;
  98         rq.data_len = sizeof(buf);
  99
 100         rq.cmd[0] = GPCMD_READ_SUBCHANNEL;
 101         rq.cmd[1] = 2;          /* MSF addressing */
 102         rq.cmd[2] = 0x40;       /* request subQ data */
 103         rq.cmd[3] = 2;          /* format */
 104         rq.cmd[8] = sizeof(buf);
 105
 106         stat = ide_cd_queue_pc(drive, &rq);
 107         if (stat)
 108                 return stat;
 109
 110         mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
 111         memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
 112         mcn_info->medium_catalog_number[mcnlen] = '\0';
 113
 114         return 0;
 115 }
 116
 117 int ide_cdrom_reset(struct cdrom_device_info *cdi)
 118 {
 119         ide_drive_t *drive = cdi->handle;
 120         struct cdrom_info *cd = drive->driver_data;
 121         struct request_sense sense;
 122         struct request req;
 123         int ret;
 124
 125         ide_cd_init_rq(drive, &req);
 126         req.cmd_type = REQ_TYPE_SPECIAL;
 127         req.cmd_flags = REQ_QUIET;
 128         ret = ide_do_drive_cmd(drive, &req, ide_wait);
 129
 130         /*
 131          * A reset will unlock the door. If it was previously locked,
 132          * lock it again.
 133          */
 134         if (cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED)
 135                 (void)ide_cd_lockdoor(drive, 1, &sense);
 136
 137         return ret;
 138 }
 139
 140 static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
 141                                 struct atapi_toc_entry **ent)
 142 {
 143         struct cdrom_info *info = drive->driver_data;
 144         struct atapi_toc *toc = info->toc;
 145         int ntracks;
 146
 147         /*
 148          * don't serve cached data, if the toc isn't valid
 149          */
 150         if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0)
 151                 return -EINVAL;
 152
 153         /* Check validity of requested track number. */
 154         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
 155
 156         if (toc->hdr.first_track == CDROM_LEADOUT)
 157                 ntracks = 0;
 158
 159         if (track == CDROM_LEADOUT)
 160                 *ent = &toc->ent[ntracks];
 161         else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
 162                 return -EINVAL;
 163         else
 164                 *ent = &toc->ent[track - toc->hdr.first_track];
 165
 166         return 0;
 167 }
 168
 169 static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
 170 {
 171         struct cdrom_ti *ti = arg;
 172         struct atapi_toc_entry *first_toc, *last_toc;
 173         unsigned long lba_start, lba_end;
 174         int stat;
 175         struct request rq;
 176         struct request_sense sense;
 177
 178         stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
 179         if (stat)
 180                 return stat;
 181
 182         stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
 183         if (stat)
 184                 return stat;
 185
 186         if (ti->cdti_trk1 != CDROM_LEADOUT)
 187                 ++last_toc;
 188         lba_start = first_toc->addr.lba;
 189         lba_end   = last_toc->addr.lba;
 190
 191         if (lba_end <= lba_start)
 192                 return -EINVAL;
 193
 194         ide_cd_init_rq(drive, &rq);
 195
 196         rq.sense = &sense;
 197         rq.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
 198         lba_to_msf(lba_start,   &rq.cmd[3], &rq.cmd[4], &rq.cmd[5]);
 199         lba_to_msf(lba_end - 1, &rq.cmd[6], &rq.cmd[7], &rq.cmd[8]);
 200
 201         return ide_cd_queue_pc(drive, &rq);
 202 }
 203
 204 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
 205 {
 206         struct cdrom_info *cd = drive->driver_data;
 207         struct cdrom_tochdr *tochdr = arg;
 208         struct atapi_toc *toc;
 209         int stat;
 210
 211         /* Make sure our saved TOC is valid. */
 212         stat = ide_cd_read_toc(drive, NULL);
 213         if (stat)
 214                 return stat;
 215
 216         toc = cd->toc;
 217         tochdr->cdth_trk0 = toc->hdr.first_track;
 218         tochdr->cdth_trk1 = toc->hdr.last_track;
 219
 220         return 0;
 221 }
 222
 223 static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
 224 {
 225         struct cdrom_tocentry *tocentry = arg;
 226         struct atapi_toc_entry *toce;
 227         int stat;
 228
 229         stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
 230         if (stat)
 231                 return stat;
 232
 233         tocentry->cdte_ctrl = toce->control;
 234         tocentry->cdte_adr  = toce->adr;
 235         if (tocentry->cdte_format == CDROM_MSF) {
 236                 lba_to_msf(toce->addr.lba,
 237                            &tocentry->cdte_addr.msf.minute,
 238                            &tocentry->cdte_addr.msf.second,
 239                            &tocentry->cdte_addr.msf.frame);
 240         } else
 241                 tocentry->cdte_addr.lba = toce->addr.lba;
 242
 243         return 0;
 244 }
 245
 246 int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
 247                           unsigned int cmd, void *arg)
 248 {
 249         ide_drive_t *drive = cdi->handle;
 250
 251         switch (cmd) {
 252         /*
 253          * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
 254          * atapi doesn't support it
 255          */
 256         case CDROMPLAYTRKIND:
 257                 return ide_cd_fake_play_trkind(drive, arg);
 258         case CDROMREADTOCHDR:
 259                 return ide_cd_read_tochdr(drive, arg);
 260         case CDROMREADTOCENTRY:
 261                 return ide_cd_read_tocentry(drive, arg);
 262         default:
 263                 return -EINVAL;
 264         }
 265 }