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79 lines
2.3 KiB
79 lines
2.3 KiB
/*
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* dma.c
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*
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* Copyright (c) 2014 Jeremy Garff <jer @ jers.net>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* 3. Neither the name of the owner nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include "dma.h"
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// DMA address mapping by DMA number index
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static const uint32_t dma_offset[] =
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{
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DMA0_OFFSET,
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DMA1_OFFSET,
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DMA2_OFFSET,
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DMA3_OFFSET,
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DMA4_OFFSET,
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DMA5_OFFSET,
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DMA6_OFFSET,
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DMA7_OFFSET,
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DMA8_OFFSET,
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DMA9_OFFSET,
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DMA10_OFFSET,
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DMA11_OFFSET,
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DMA12_OFFSET,
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DMA13_OFFSET,
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DMA14_OFFSET,
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DMA15_OFFSET,
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};
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uint32_t dmanum_to_offset(int dmanum)
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{
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int array_size = sizeof(dma_offset) / sizeof(dma_offset[0]);
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if (dmanum >= array_size)
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{
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return 0;
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}
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return dma_offset[dmanum];
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}
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