2 * $Id: dma.h,v 1.1 2006-07-11 01:35:23 nkeynes Exp $
6 * Copyright (c) 2006 Nathan Keynes.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
22 * Setup the DMAC for a transfer. Assumes 32-byte block transfer.
23 * Caller is responsible for making sure no-one else is using the
26 * @param channel DMA channel to use, 0 to 3
27 * @param source source address (if a memory source)
28 * @param dest destination address (if a memory destination)
29 * @param length number of bytes to transfer (must be a multiple of
31 * @param direction 0 = host to device, 1 = device to host
33 void dmac_prepare_channel( int channel, uint32_t source, uint32_t dest,
34 uint32_t length, int direction );
37 * Transfer data to the PVR via DMA. Target address should be
38 * 0x10000000 for the TA, and 0x11000000 + VRAM address for VRAM.
40 * @param target Target address
41 * @param buf Data to write (must be 32-byte aligned)
42 * @param length Size of data to write, in bytes.
43 * @param region Target region for VRAM writes, 0 for 64-byte region, 1 for 32-byte region.
45 * @return 0 on success, non-zero on failure.
47 int pvr_dma_write( unsigned int target, char *buf, int length, int region );
.