Esempio n. 1
0
static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
				      int dir, struct snd_xferi32 __user *data32)
{
	compat_caddr_t buf;
	u32 frames;
	int err;

	if (! substream->runtime)
		return -ENOTTY;
	if (substream->stream != dir)
		return -EINVAL;
	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
		return -EBADFD;

	if (get_user(buf, &data32->buf) ||
	    get_user(frames, &data32->frames))
		return -EFAULT;

	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
		err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
	else
		err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
	if (err < 0)
		return err;
	/* copy the result */
	if (put_user(err, &data32->result))
		return -EFAULT;
	return 0;
}
Esempio n. 2
0
static size_t u_audio_capture(struct gaudio *card, void *buf, size_t count)
{
	ssize_t result;
	mm_segment_t old_fs;
	snd_pcm_sframes_t frames;
	int err = 0;

	struct gaudio_snd_dev	 *snd = &card->capture;
	struct snd_pcm_substream *substream = snd->substream;
	struct snd_pcm_runtime   *runtime = substream->runtime;

	if (!audio_reinit) {
		err = gaudio_open_streams();
		if (err) {
			pr_err("Failed to init audio streams: err %d", err);
			return 0;
		}
		audio_reinit = 1;
	}

try_again:
	if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
		runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ||
		runtime->status->state == SNDRV_PCM_STATE_SETUP) {
		result = snd_pcm_kernel_ioctl(substream,
				SNDRV_PCM_IOCTL_PREPARE, NULL);
		if (result < 0) {
			pr_err("Preparing capture failed: %d\n",
					(int)result);
			return result;
		}
	}

	frames = bytes_to_frames(runtime, count);

	old_fs = get_fs();
	set_fs(KERNEL_DS);

	pr_debug("frames = %d, count = %d", (int)frames, count);

	result = snd_pcm_lib_read(substream, buf, frames);
	if (result != frames) {
		pr_err("Capture error: %d\n", (int)result);
		set_fs(old_fs);
		goto try_again;
	}

	set_fs(old_fs);

	return 0;
}