CSSA
[CSSA] = { 0x0008, 0x40, OMAP_DMA_REG_2X16BIT },
p->dma_write(src_start, CSSA, lch);
offset = p->dma_read(CSSA, lch);
offset |= (p->dma_read(CSSA, lch) & 0xFFFF0000);
[CSSA] = { 0x009c, 0x60, OMAP_DMA_REG_32BIT },
cxsa = CSSA;
cxsa = CSSA;
addr = omap_dma_chan_read(c, CSSA);
addr |= omap_dma_chan_read(c, CSSA) & 0xffff0000;