snd_gf1_set_default_handlers
void snd_gf1_set_default_handlers(struct snd_gus_card * gus, unsigned int what);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_WRITE);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_READ);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | voice->number);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_ALL);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | i);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_TIMER1 | SNDRV_GF1_HANDLER_TIMER2);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_OUT);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_IN);