static int sound_open(struct inode *inode, struct file *file)
{
int dev = MINOR(inode->i_rdev);
int retval;
DEB(printk("sound_open(dev=%d)\n", dev));
if ((dev >= SND_NDEVS) || (dev < 0)) {
printk(KERN_ERR "Invalid minor device %d\n", dev);
return -ENXIO;
}
switch (dev & 0x0f) {
case SND_DEV_CTL:
dev >>= 4;
if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
char modname[20];
sprintf(modname, "mixer%d", dev);
request_module(modname);
}
if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
return -ENXIO;
if (mixer_devs[dev]->owner)
__MOD_INC_USE_COUNT (mixer_devs[dev]->owner);
break;
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
if ((retval = sequencer_open(dev, file)) < 0)
return retval;
break;
case SND_DEV_MIDIN:
if ((retval = MIDIbuf_open(dev, file)) < 0)
return retval;
break;
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
if ((retval = audio_open(dev, file)) < 0)
return retval;
break;
default:
printk(KERN_ERR "Invalid minor device %d\n", dev);
return -ENXIO;
}
return 0;
}
static int sound_open(struct inode *inode, struct file *file)
{
int dev = iminor(inode);
int retval;
DEB(printk("sound_open(dev=%d)\n", dev));
if ((dev >= SND_NDEVS) || (dev < 0)) {
printk(KERN_ERR "Invalid minor device %d\n", dev);
return -ENXIO;
}
mutex_lock(&soundcard_mutex);
switch (dev & 0x0f) {
case SND_DEV_CTL:
dev >>= 4;
if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
request_module("mixer%d", dev);
}
retval = -ENXIO;
if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
break;
if (!try_module_get(mixer_devs[dev]->owner))
break;
retval = 0;
break;
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
retval = sequencer_open(dev, file);
break;
case SND_DEV_MIDIN:
retval = MIDIbuf_open(dev, file);
break;
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
retval = audio_open(dev, file);
break;
default:
printk(KERN_ERR "Invalid minor device %d\n", dev);
retval = -ENXIO;
}
mutex_unlock(&soundcard_mutex);
return retval;
}
static int sound_open(struct inode *inode, struct file *file)
{
int dev, retval;
if (is_unloading) {
/* printk(KERN_ERR "Sound: Driver partially removed. Can't open device\n");*/
return -EBUSY;
}
dev = MINOR(inode->i_rdev);
if (!soundcard_configured && dev != SND_DEV_CTL && dev != SND_DEV_STATUS) {
/* printk("SoundCard Error: The sound system has not been configured\n");*/
return -ENXIO;
}
DEB(printk("sound_open(dev=%d)\n", dev));
if ((dev >= SND_NDEVS) || (dev < 0)) {
/* printk(KERN_ERR "Invalid minor device %d\n", dev);*/
return -ENXIO;
}
switch (dev & 0x0f) {
case SND_DEV_STATUS:
break;
case SND_DEV_CTL:
dev >>= 4;
if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
char modname[20];
sprintf(modname, "mixer%d", dev);
request_module(modname);
}
if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
return -ENXIO;
break;
#ifdef CONFIG_SEQUENCER
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
if ((retval = sequencer_open(dev, file)) < 0)
return retval;
break;
#endif
#ifdef CONFIG_MIDI
case SND_DEV_MIDIN:
if ((retval = MIDIbuf_open(dev, file)) < 0)
return retval;
break;
#endif
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
if ((retval = audio_open(dev, file)) < 0)
return retval;
break;
#endif
default:
printk(KERN_ERR "Invalid minor device %d\n", dev);
return -ENXIO;
}
in_use++;
#ifdef CONFIG_MODULES
notifier_call_chain(&sound_locker, 1, 0);
lock_depth++;
#endif
return 0;
}
