/*
 * dma.h
 *
 *  Created on: Aug 20, 2011
 *      Author: Tiberiu
 */

#ifndef DMA_H_
#define DMA_H_

#include <types.h>

enum DmaRegisters
{
	DmaRegisterStatus = 0x08,
	DmaRegisterCommand = 0x08,
	DmaRegisterRequest = 0x09,
	DmaRegisterSingleChannelMask = 0x0A,
	DmaRegisterMode = 0x0B,
	DmaRegisterFlipFlopReset = 0x0C,
	DmaRegisterIntermediate = 0x0D,
	DmaRegisterMasterReset = 0x0D,
	DmaRegisterMaskReset = 0x0E,
	DmaRegisterMultichannelMask = 0x0F,

	DmaRegisterChannel0Address = 0x00,
	DmaRegisterChannel1Address = 0x02,
	DmaRegisterChannel2Address = 0x04,
	DmaRegisterChannel3Address = 0x06,
	DmaRegisterChannel4Address = 0xC0,
	DmaRegisterChannel5Address = 0xC4,
	DmaRegisterChannel6Address = 0xC8,
	DmaRegisterChannel7Address = 0xCC,

	DmaRegisterChannel0Count = 0x01,
	DmaRegisterChannel1Count = 0x03,
	DmaRegisterChannel2Count = 0x05,
	DmaRegisterChannel3Count = 0x07,
	DmaRegisterChannel4Count = 0xC2,
	DmaRegisterChannel5Count = 0xC6,
	DmaRegisterChannel6Count = 0xCA,
	DmaRegisterChannel7Count = 0xCE,

	DmaRegisterChannel1PageAddress = 0x83,
	DmaRegisterChannel2PageAddress = 0x81,
	DmaRegisterChannel3PageAddress = 0x82,
	DmaRegisterChannel5PageAddress = 0x8B,
	DmaRegisterChannel6PageAddress = 0x89,
	DmaRegisterChannel7PageAddress = 0x8A
};

enum DmaModes
{
	DmaModeChannelMask = 0x3,

	DmaModeSelfTest = 0,
	DmaModeWrite = 0x8,
	DmaModeRead = 0x4,
	DmaModeAutoReinit = 0x10,
	DmaModeDown = 0x20,

	DmaModeTransferOnDemand = 0,
	DmaModeTransferSingleDma = 0x40,
	DmaModeTransferBlockDma = 0x80,
	DmaModeTransferCascade = 0xC0
};

extern void DmaSetAddress (uint8 channel, uint8 low, uint8 high);
extern void DmaSetCount (uint8 channel, uint8 low, uint8 high);
extern void DmaSetExternalPageRegisters (uint8 channel, uint8 val);
extern void DmaSetMode (uint8 channel, uint8 mode);

extern void DmaResetFlipFlop (uint8 channel);
extern void DmaReset ();

extern void DmaMaskChannel(uint8 channel);
extern void DmaUnmaskChannel (uint8 channel);
extern void DmaUnmaskAll ();

#endif /* DMA_H_ */