Hi,

I am working on a Audio Driver with DMA enabled. Presently I am able to
hear some junk data when I say,

"audioplay file_name.wav" from the application layer.

This is my Interrupt Routine, Please verify:

txdma_intr(void *arg)
{
	struct txaudio_softc *sc =3D arg;
	int s;
	int count =3D sc->sc_pages;		/* no. of  pages (16 *
4026 =3D 65536->Ring Buffer) */
=09
	s =3D splnet();
  	count --;
	if(count =3D=3D 0)
	{
    	 REGVAL64(DMA_ADDR + DMCSR) |=3D (1ULL << 5);	/* Update
Control Reg once the DMA Transfer is Complete */
    	 REGVAL64(DMA_ADDR + DMCCR) &=3D (1ULL << 10);	/* DMA Interrupt
Disable */
	 REGVAL64(DMA_ADDR + DMCHAR) =3D 0; 		      /* stop
DMA */
    	 if(sc->sc_pintr)
/* Update the argument(/dev/audio.c) */
		  (*sc->sc_pintr)(sc->sc_parg);
	}
	else
	{
  	if(sc->sc_pintr)
		(*sc->sc_pintr)(sc->sc_parg);

   	REGVAL64(DMA_ADDR + DMCSR) |=3D (1ULL << 5);	/* Update
Control Reg once the DMA Transfer is Complete */
	}
	splx(s);
	return (1);

I am using mapped and cacheable region.

Please give some inputs.

Regards
Swamy