int
audio_open (int dev, struct fileinfo *file)
{
int ret;
int bits;
int dev_type = dev & 0x0f;
int mode = file->mode & O_ACCMODE;
dev = dev >> 4;
if (dev_type == SND_DEV_DSP16)
bits = 16;
else
bits = 8;
if ((ret = DMAbuf_open (dev, mode)) < 0)
return ret;
if (audio_devs[dev]->coproc)
if ((ret = audio_devs[dev]->coproc->
open (audio_devs[dev]->coproc->devc, COPR_PCM)) < 0)
{
audio_release (dev, file);
printk ("Sound: Can't access coprocessor device\n");
return ret;
}
local_conversion[dev] = 0;
if (DMAbuf_ioctl (dev, SNDCTL_DSP_SETFMT, (caddr_t) bits, 1) != bits)
{
printk ("audio: Can't set number of bits on device %d\n", dev);
audio_release (dev, file);
return -(ENXIO);
}
if (dev_type == SND_DEV_AUDIO)
{
set_format (dev, AFMT_MU_LAW);
}
else
set_format (dev, bits);
audio_mode[dev] = AM_NONE;
dev_nblock[dev] = 0;
return ret;
}
int audio_open(int dev, struct file *file)
{
int ret;
int bits;
int dev_type = dev & 0x0f;
int mode = translate_mode(file);
const struct audio_driver *driver;
const struct coproc_operations *coprocessor;
dev = dev >> 4;
if (dev_type == SND_DEV_DSP16)
bits = 16;
else
bits = 8;
if (dev < 0 || dev >= num_audiodevs)
return -ENXIO;
driver = audio_devs[dev]->d;
if (!try_module_get(driver->owner))
return -ENODEV;
if ((ret = DMAbuf_open(dev, mode)) < 0)
goto error_1;
if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) {
if (!try_module_get(coprocessor->owner))
goto error_2;
if ((ret = coprocessor->open(coprocessor->devc, COPR_PCM)) < 0) {
printk(KERN_WARNING "Sound: Can't access coprocessor device\n");
goto error_3;
}
}
audio_devs[dev]->local_conversion = 0;
if (dev_type == SND_DEV_AUDIO)
set_format(dev, AFMT_MU_LAW);
else
set_format(dev, bits);
audio_devs[dev]->audio_mode = AM_NONE;
return 0;
/*
* Clean-up stack: this is what needs (un)doing if
* we can't open the audio device ...
*/
error_3:
module_put(coprocessor->owner);
error_2:
DMAbuf_release(dev, mode);
error_1:
module_put(driver->owner);
return ret;
}
