| nkeynes@185 | 1 | /**
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| nkeynes@561 | 2 | * $Id$
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| nkeynes@185 | 3 | *
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| nkeynes@185 | 4 | * DMA support code
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| nkeynes@185 | 5 | *
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| nkeynes@185 | 6 | * Copyright (c) 2006 Nathan Keynes.
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| nkeynes@185 | 7 | *
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| nkeynes@185 | 8 | * This program is free software; you can redistribute it and/or modify
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| nkeynes@185 | 9 | * it under the terms of the GNU General Public License as published by
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| nkeynes@185 | 10 | * the Free Software Foundation; either version 2 of the License, or
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| nkeynes@185 | 11 | * (at your option) any later version.
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| nkeynes@185 | 12 | *
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| nkeynes@185 | 13 | * This program is distributed in the hope that it will be useful,
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| nkeynes@185 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| nkeynes@185 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| nkeynes@185 | 16 | * GNU General Public License for more details.
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| nkeynes@185 | 17 | */
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| nkeynes@185 | 18 |
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| nkeynes@185 | 19 | #include "lib.h"
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| nkeynes@185 | 20 |
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| nkeynes@185 | 21 | /**
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| nkeynes@185 | 22 | * Setup the DMAC for a transfer. Assumes 32-byte block transfer.
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| nkeynes@185 | 23 | * Caller is responsible for making sure no-one else is using the
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| nkeynes@185 | 24 | * channel already.
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| nkeynes@185 | 25 | *
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| nkeynes@185 | 26 | * @param channel DMA channel to use, 0 to 3
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| nkeynes@185 | 27 | * @param source source address (if a memory source)
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| nkeynes@185 | 28 | * @param dest destination address (if a memory destination)
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| nkeynes@185 | 29 | * @param length number of bytes to transfer (must be a multiple of
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| nkeynes@185 | 30 | * 32.
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| nkeynes@185 | 31 | * @param direction 0 = host to device, 1 = device to host
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| nkeynes@185 | 32 | */
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| nkeynes@185 | 33 | void dmac_prepare_channel( int channel, uint32_t source, uint32_t dest,
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| nkeynes@185 | 34 | uint32_t length, int direction );
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| nkeynes@185 | 35 |
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| nkeynes@185 | 36 | /**
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| nkeynes@185 | 37 | * Transfer data to the PVR via DMA. Target address should be
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| nkeynes@185 | 38 | * 0x10000000 for the TA, and 0x11000000 + VRAM address for VRAM.
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| nkeynes@185 | 39 | *
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| nkeynes@185 | 40 | * @param target Target address
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| nkeynes@185 | 41 | * @param buf Data to write (must be 32-byte aligned)
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| nkeynes@185 | 42 | * @param length Size of data to write, in bytes.
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| nkeynes@185 | 43 | * @param region Target region for VRAM writes, 0 for 64-byte region, 1 for 32-byte region.
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| nkeynes@185 | 44 | *
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| nkeynes@185 | 45 | * @return 0 on success, non-zero on failure.
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| nkeynes@185 | 46 | */
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| nkeynes@185 | 47 | int pvr_dma_write( unsigned int target, char *buf, int length, int region );
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lxdream 0.9.1