mca_set_dma_mode - set the DMA mode
void mca_set_dma_mode (unsigned int dmanr, unsigned int mode);
dmanr DMA channel mode mode to set
The DMA controller supports several modes. The mode values you can
MCA_DMA_MODE_READ when reading from the DMA device. MCA_DMA_MODE_WRITE to writing to the DMA device. MCA_DMA_MODE_IO to do DMA to or from an I/O port. MCA_DMA_MODE_16 to do 16bit transfers.