1206    Description: Prepare foldback capture device for playback.
1730  *  Foldback capture support device description
1973    Description: This routine will open the 4DWave foldback capture device.
2002    Description: This routine will close the 4DWave foldback capture device. 
2165    Description: This routine registers the 4DWave device for foldback PCM support.
2175 	struct snd_pcm *foldback;  in snd_trident_foldback_pcm()  local
2182 	err = snd_pcm_new(trident->card, "trident_dx_nx", device, 0, num_chan, &foldback);  in snd_trident_foldback_pcm()
2186 	foldback->private_data = trident;  in snd_trident_foldback_pcm()
2188 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_nx_foldback_ops);  in snd_trident_foldback_pcm()
2190 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_foldback_ops);  in snd_trident_foldback_pcm()
2191 	foldback->info_flags = 0;  in snd_trident_foldback_pcm()
2192 	strscpy(foldback->name, "Trident 4DWave");  in snd_trident_foldback_pcm()
2193 	substream = foldback->streams[SNDRV_PCM_STREAM_CAPTURE].substream;  in snd_trident_foldback_pcm()
2203 	trident->foldback = foldback;  in snd_trident_foldback_pcm()
2206 		snd_pcm_set_managed_buffer_all(foldback, SNDRV_DMA_TYPE_DEV_SG,  in snd_trident_foldback_pcm()
2210 		snd_pcm_set_managed_buffer_all(foldback, SNDRV_DMA_TYPE_DEV,  in snd_trident_foldback_pcm()