CDAC
[CDAC] = { 0x001a, 0x40, OMAP_DMA_REG_16BIT },
p->dma_write(0, CDAC, lch);
if (likely(p->dma_read(CDAC, lch)))
offset = p->dma_read(CDAC, lch);
offset = p->dma_read(CDAC, lch);
[CDAC] = { 0x00b8, 0x60, OMAP_DMA_REG_32BIT },
omap_dma_chan_write(c, CDAC, 0);
cdac = omap_dma_chan_read_3_3(c, CDAC);
addr = omap_dma_chan_read_3_3(c, CDAC);