seq_oss_ioctl.c

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/*
 * OSS compatible sequencer driver
 *
 * OSS compatible i/o control
 *
 * Copyright (C) 1998,99 Takashi Iwai <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#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.port, dp->addr.client);
    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:
        debug_printk(("panic\n"));
        snd_seq_oss_reset(dp);
        return -EINVAL;

    case SNDCTL_SEQ_SYNC:
        debug_printk(("sync\n"));
        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:
        debug_printk(("reset\n"));
        snd_seq_oss_reset(dp);
        return 0;

    case SNDCTL_SEQ_TESTMIDI:
        debug_printk(("test midi\n"));
        if (get_user(dev, p))
            return -EFAULT;
        return snd_seq_oss_midi_open(dp, dev, dp->file_mode);

    case SNDCTL_SEQ_GETINCOUNT:
        debug_printk(("get in count\n"));
        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:
        debug_printk(("get out count\n"));
        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:
        debug_printk(("get time\n"));
        return put_user(snd_seq_oss_timer_cur_tick(dp->timer), p) ? -EFAULT : 0;

    case SNDCTL_SEQ_RESETSAMPLES:
        debug_printk(("reset samples\n"));
        if (get_user(dev, p))
            return -EFAULT;
        return snd_seq_oss_synth_ioctl(dp, dev, cmd, carg);

    case SNDCTL_SEQ_NRSYNTHS:
        debug_printk(("nr synths\n"));
        return put_user(dp->max_synthdev, p) ? -EFAULT : 0;

    case SNDCTL_SEQ_NRMIDIS:
        debug_printk(("nr midis\n"));
        return put_user(dp->max_mididev, p) ? -EFAULT : 0;

    case SNDCTL_SYNTH_MEMAVL:
        debug_printk(("mem avail\n"));
        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:
        debug_printk(("4op\n"));
        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:
        debug_printk(("synth info\n"));
        return snd_seq_oss_synth_info_user(dp, arg);

    case SNDCTL_SEQ_OUTOFBAND:
        debug_printk(("out of band\n"));
        return snd_seq_oss_oob_user(dp, arg);

    case SNDCTL_MIDI_INFO:
        debug_printk(("midi info\n"));
        return snd_seq_oss_midi_info_user(dp, arg);

    case SNDCTL_SEQ_THRESHOLD:
        debug_printk(("threshold\n"));
        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:
        debug_printk(("pretime\n"));
        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:
        debug_printk(("others\n"));
        if (! is_write_mode(dp->file_mode))
            return -EIO;
        return snd_seq_oss_synth_ioctl(dp, 0, cmd, carg);
    }
    return 0;
}