CS_REG
iowrite32(ENABLE | SCATTER_GATHER_MODE | START, CS_REG(s->dma_channel));
if (ioread32(CS_REG(s->dma_channel)) & DONE)
iowrite32(ABORT, CS_REG(s->dma_channel));
u32 status = ioread32(CS_REG(i));
u32 ctrl = ioread32(CS_REG(i));
iowrite32(ABORT, CS_REG(i));
u32 status = ioread32(CS_REG(i));