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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OSS compatible sequencer driver
*
* OSS compatible i/o control
*
* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
*/
#include "seq_oss_device.h"
#include "seq_oss_readq.h"
#include "seq_oss_writeq.h"
#include "seq_oss_timer.h"
#include "seq_oss_synth.h"
#include "seq_oss_midi.h"
#include "seq_oss_event.h"
static int snd_seq_oss_synth_info_user(struct seq_oss_devinfo *dp, void __user *arg)
{
struct synth_info info;
if (copy_from_user(&info, arg, sizeof(info)))
return -EFAULT;
if (snd_seq_oss_synth_make_info(dp, info.device, &info) < 0)
return -EINVAL;
if (copy_to_user(arg, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static int snd_seq_oss_midi_info_user(struct seq_oss_devinfo *dp, void __user *arg)
{
struct midi_info info;
if (copy_from_user(&info, arg, sizeof(info)))
return -EFAULT;
if (snd_seq_oss_midi_make_info(dp, info.device, &info) < 0)
return -EINVAL;
if (copy_to_user(arg, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static int snd_seq_oss_oob_user(struct seq_oss_devinfo *dp, void __user *arg)
{
unsigned char ev[8];
struct snd_seq_event tmpev;
if (copy_from_user(ev, arg, 8))
return -EFAULT;
memset(&tmpev, 0, sizeof(tmpev));
snd_seq_oss_fill_addr(dp, &tmpev, dp->addr.client, dp->addr.port);
tmpev.time.tick = 0;
if (! snd_seq_oss_process_event(dp, (union evrec *)ev, &tmpev)) {
snd_seq_oss_dispatch(dp, &tmpev, 0, 0);
}
return 0;
}
int
snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long carg)
{
int dev, val;
void __user *arg = (void __user *)carg;
int __user *p = arg;
switch (cmd) {
case SNDCTL_TMR_TIMEBASE:
case SNDCTL_TMR_TEMPO:
case SNDCTL_TMR_START:
case SNDCTL_TMR_STOP:
case SNDCTL_TMR_CONTINUE:
case SNDCTL_TMR_METRONOME:
case SNDCTL_TMR_SOURCE:
case SNDCTL_TMR_SELECT:
case SNDCTL_SEQ_CTRLRATE:
return snd_seq_oss_timer_ioctl(dp->timer, cmd, arg);
case SNDCTL_SEQ_PANIC:
snd_seq_oss_reset(dp);
return -EINVAL;
case SNDCTL_SEQ_SYNC:
if (! is_write_mode(dp->file_mode) || dp->writeq == NULL)
return 0;
while (snd_seq_oss_writeq_sync(dp->writeq))
;
if (signal_pending(current))
return -ERESTARTSYS;
return 0;
case SNDCTL_SEQ_RESET:
snd_seq_oss_reset(dp);
return 0;
case SNDCTL_SEQ_TESTMIDI:
if (get_user(dev, p))
return -EFAULT;
return snd_seq_oss_midi_open(dp, dev, dp->file_mode);
case SNDCTL_SEQ_GETINCOUNT:
if (dp->readq == NULL || ! is_read_mode(dp->file_mode))
return 0;
return put_user(dp->readq->qlen, p) ? -EFAULT : 0;
case SNDCTL_SEQ_GETOUTCOUNT:
if (! is_write_mode(dp->file_mode) || dp->writeq == NULL)
return 0;
return put_user(snd_seq_oss_writeq_get_free_size(dp->writeq), p) ? -EFAULT : 0;
case SNDCTL_SEQ_GETTIME:
return put_user(snd_seq_oss_timer_cur_tick(dp->timer), p) ? -EFAULT : 0;
case SNDCTL_SEQ_RESETSAMPLES:
if (get_user(dev, p))
return -EFAULT;
return snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);
case SNDCTL_SEQ_NRSYNTHS:
return put_user(dp->max_synthdev, p) ? -EFAULT : 0;
case SNDCTL_SEQ_NRMIDIS:
return put_user(dp->max_mididev, p) ? -EFAULT : 0;
case SNDCTL_SYNTH_MEMAVL:
if (get_user(dev, p))
return -EFAULT;
val = snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);
return put_user(val, p) ? -EFAULT : 0;
case SNDCTL_FM_4OP_ENABLE:
if (get_user(dev, p))
return -EFAULT;
snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);
return 0;
case SNDCTL_SYNTH_INFO:
case SNDCTL_SYNTH_ID:
return snd_seq_oss_synth_info_user(dp, arg);
case SNDCTL_SEQ_OUTOFBAND:
return snd_seq_oss_oob_user(dp, arg);
case SNDCTL_MIDI_INFO:
return snd_seq_oss_midi_info_user(dp, arg);
case SNDCTL_SEQ_THRESHOLD:
if (! is_write_mode(dp->file_mode))
return 0;
if (get_user(val, p))
return -EFAULT;
if (val < 1)
val = 1;
if (val >= dp->writeq->maxlen)
val = dp->writeq->maxlen - 1;
snd_seq_oss_writeq_set_output(dp->writeq, val);
return 0;
case SNDCTL_MIDI_PRETIME:
if (dp->readq == NULL || !is_read_mode(dp->file_mode))
return 0;
if (get_user(val, p))
return -EFAULT;
if (val <= 0)
val = -1;
else
val = (HZ * val) / 10;
dp->readq->pre_event_timeout = val;
return put_user(val, p) ? -EFAULT : 0;
default:
if (! is_write_mode(dp->file_mode))
return -EIO;
return snd_seq_oss_synth_ioctl(dp, 0, cmd, carg);
}
return 0;
}
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