sound/core/seq/oss/seq_oss_ioctl.c

   1 /*
   2  * OSS compatible sequencer driver
   3  *
   4  * OSS compatible i/o control
   5  *
   6  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22
  23 #include "seq_oss_device.h"
  24 #include "seq_oss_readq.h"
  25 #include "seq_oss_writeq.h"
  26 #include "seq_oss_timer.h"
  27 #include "seq_oss_synth.h"
  28 #include "seq_oss_midi.h"
  29 #include "seq_oss_event.h"
  30
  31 static int snd_seq_oss_synth_info_user(struct seq_oss_devinfo *dp, void __user *arg)
  32 {
  33         struct synth_info info;
  34
  35         if (copy_from_user(&info, arg, sizeof(info)))
  36                 return -EFAULT;
  37         if (snd_seq_oss_synth_make_info(dp, info.device, &info) < 0)
  38                 return -EINVAL;
  39         if (copy_to_user(arg, &info, sizeof(info)))
  40                 return -EFAULT;
  41         return 0;
  42 }
  43
  44 static int snd_seq_oss_midi_info_user(struct seq_oss_devinfo *dp, void __user *arg)
  45 {
  46         struct midi_info info;
  47
  48         if (copy_from_user(&info, arg, sizeof(info)))
  49                 return -EFAULT;
  50         if (snd_seq_oss_midi_make_info(dp, info.device, &info) < 0)
  51                 return -EINVAL;
  52         if (copy_to_user(arg, &info, sizeof(info)))
  53                 return -EFAULT;
  54         return 0;
  55 }
  56
  57 static int snd_seq_oss_oob_user(struct seq_oss_devinfo *dp, void __user *arg)
  58 {
  59         unsigned char ev[8];
  60         struct snd_seq_event tmpev;
  61
  62         if (copy_from_user(ev, arg, 8))
  63                 return -EFAULT;
  64         memset(&tmpev, 0, sizeof(tmpev));
  65         snd_seq_oss_fill_addr(dp, &tmpev, dp->addr.port, dp->addr.client);
  66         tmpev.time.tick = 0;
  67         if (! snd_seq_oss_process_event(dp, (union evrec *)ev, &tmpev)) {
  68                 snd_seq_oss_dispatch(dp, &tmpev, 0, 0);
  69         }
  70         return 0;
  71 }
  72
  73 int
  74 snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long carg)
  75 {
  76         int dev, val;
  77         void __user *arg = (void __user *)carg;
  78         int __user *p = arg;
  79
  80         switch (cmd) {
  81         case SNDCTL_TMR_TIMEBASE:
  82         case SNDCTL_TMR_TEMPO:
  83         case SNDCTL_TMR_START:
  84         case SNDCTL_TMR_STOP:
  85         case SNDCTL_TMR_CONTINUE:
  86         case SNDCTL_TMR_METRONOME:
  87         case SNDCTL_TMR_SOURCE:
  88         case SNDCTL_TMR_SELECT:
  89         case SNDCTL_SEQ_CTRLRATE:
  90                 return snd_seq_oss_timer_ioctl(dp->timer, cmd, arg);
  91
  92         case SNDCTL_SEQ_PANIC:
  93                 snd_seq_oss_reset(dp);
  94                 return -EINVAL;
  95
  96         case SNDCTL_SEQ_SYNC:
  97                 if (! is_write_mode(dp->file_mode) || dp->writeq == NULL)
  98                         return 0;
  99                 while (snd_seq_oss_writeq_sync(dp->writeq))
 100                         ;
 101                 if (signal_pending(current))
 102                         return -ERESTARTSYS;
 103                 return 0;
 104
 105         case SNDCTL_SEQ_RESET:
 106                 snd_seq_oss_reset(dp);
 107                 return 0;
 108
 109         case SNDCTL_SEQ_TESTMIDI:
 110                 if (get_user(dev, p))
 111                         return -EFAULT;
 112                 return snd_seq_oss_midi_open(dp, dev, dp->file_mode);
 113
 114         case SNDCTL_SEQ_GETINCOUNT:
 115                 if (dp->readq == NULL || ! is_read_mode(dp->file_mode))
 116                         return 0;
 117                 return put_user(dp->readq->qlen, p) ? -EFAULT : 0;
 118
 119         case SNDCTL_SEQ_GETOUTCOUNT:
 120                 if (! is_write_mode(dp->file_mode) || dp->writeq == NULL)
 121                         return 0;
 122                 return put_user(snd_seq_oss_writeq_get_free_size(dp->writeq), p) ? -EFAULT : 0;
 123
 124         case SNDCTL_SEQ_GETTIME:
 125                 return put_user(snd_seq_oss_timer_cur_tick(dp->timer), p) ? -EFAULT : 0;
 126
 127         case SNDCTL_SEQ_RESETSAMPLES:
 128                 if (get_user(dev, p))
 129                         return -EFAULT;
 130                 return snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);
 131
 132         case SNDCTL_SEQ_NRSYNTHS:
 133                 return put_user(dp->max_synthdev, p) ? -EFAULT : 0;
 134
 135         case SNDCTL_SEQ_NRMIDIS:
 136                 return put_user(dp->max_mididev, p) ? -EFAULT : 0;
 137
 138         case SNDCTL_SYNTH_MEMAVL:
 139                 if (get_user(dev, p))
 140                         return -EFAULT;
 141                 val = snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);
 142                 return put_user(val, p) ? -EFAULT : 0;
 143
 144         case SNDCTL_FM_4OP_ENABLE:
 145                 if (get_user(dev, p))
 146                         return -EFAULT;
 147                 snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);
 148                 return 0;
 149
 150         case SNDCTL_SYNTH_INFO:
 151         case SNDCTL_SYNTH_ID:
 152                 return snd_seq_oss_synth_info_user(dp, arg);
 153
 154         case SNDCTL_SEQ_OUTOFBAND:
 155                 return snd_seq_oss_oob_user(dp, arg);
 156
 157         case SNDCTL_MIDI_INFO:
 158                 return snd_seq_oss_midi_info_user(dp, arg);
 159
 160         case SNDCTL_SEQ_THRESHOLD:
 161                 if (! is_write_mode(dp->file_mode))
 162                         return 0;
 163                 if (get_user(val, p))
 164                         return -EFAULT;
 165                 if (val < 1)
 166                         val = 1;
 167                 if (val >= dp->writeq->maxlen)
 168                         val = dp->writeq->maxlen - 1;
 169                 snd_seq_oss_writeq_set_output(dp->writeq, val);
 170                 return 0;
 171
 172         case SNDCTL_MIDI_PRETIME:
 173                 if (dp->readq == NULL || !is_read_mode(dp->file_mode))
 174                         return 0;
 175                 if (get_user(val, p))
 176                         return -EFAULT;
 177                 if (val <= 0)
 178                         val = -1;
 179                 else
 180                         val = (HZ * val) / 10;
 181                 dp->readq->pre_event_timeout = val;
 182                 return put_user(val, p) ? -EFAULT : 0;
 183
 184         default:
 185                 if (! is_write_mode(dp->file_mode))
 186                         return -EIO;
 187                 return snd_seq_oss_synth_ioctl(dp, 0, cmd, carg);
 188         }
 189         return 0;
 190 }
 191