nkeynes@185: /**
nkeynes@185:  * $Id: dma.h,v 1.1 2006-07-11 01:35:23 nkeynes Exp $
nkeynes@185:  * 
nkeynes@185:  * DMA support code
nkeynes@185:  *
nkeynes@185:  * Copyright (c) 2006 Nathan Keynes.
nkeynes@185:  *
nkeynes@185:  * This program is free software; you can redistribute it and/or modify
nkeynes@185:  * it under the terms of the GNU General Public License as published by
nkeynes@185:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@185:  * (at your option) any later version.
nkeynes@185:  *
nkeynes@185:  * This program is distributed in the hope that it will be useful,
nkeynes@185:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@185:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@185:  * GNU General Public License for more details.
nkeynes@185:  */
nkeynes@185: 
nkeynes@185: #include "lib.h"
nkeynes@185: 
nkeynes@185: /**
nkeynes@185:  * Setup the DMAC for a transfer. Assumes 32-byte block transfer.
nkeynes@185:  * Caller is responsible for making sure no-one else is using the
nkeynes@185:  * channel already. 
nkeynes@185:  *
nkeynes@185:  * @param channel DMA channel to use, 0 to 3
nkeynes@185:  * @param source source address (if a memory source)
nkeynes@185:  * @param dest   destination address (if a memory destination)
nkeynes@185:  * @param length number of bytes to transfer (must be a multiple of
nkeynes@185:  *               32.
nkeynes@185:  * @param direction 0 = host to device, 1 = device to host
nkeynes@185:  */
nkeynes@185: void dmac_prepare_channel( int channel, uint32_t source, uint32_t dest,
nkeynes@185: 			   uint32_t length, int direction );
nkeynes@185: 
nkeynes@185: /**
nkeynes@185:  * Transfer data to the PVR via DMA. Target address should be
nkeynes@185:  * 0x10000000 for the TA, and 0x11000000 + VRAM address for VRAM.
nkeynes@185:  *
nkeynes@185:  * @param target Target address
nkeynes@185:  * @param buf    Data to write (must be 32-byte aligned)
nkeynes@185:  * @param length Size of data to write, in bytes.
nkeynes@185:  * @param region Target region for VRAM writes, 0 for 64-byte region, 1 for 32-byte region.
nkeynes@185:  *
nkeynes@185:  * @return 0 on success, non-zero on failure.
nkeynes@185:  */
nkeynes@185: int pvr_dma_write( unsigned int target, char *buf, int length, int region );