41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Driver for Calypso DMA controller */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <memory.h>
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#define BASE_ADDR_DMA 0xfffffc00
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enum dma_reg {
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CONTROLLER_CONF = 0x00,
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ALLOC_CONFIG = 0x02,
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};
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#define DMA_REG(m) (BASE_ADDR_DMA + (m))
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#define DMA_RAD(x) DMA_REG((x)*0x10 + 0x0)
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#define DMA_RDPATH(x) DMA_REG((x)*0x10 + 0x2)
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#define DMA_AAD(x) DMA_REG((x)*0x10 + 0x4)
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#define DMA_ALGTH(x) DMA_REG((x)*0x10 + 0x6)
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#define DMA_CTRL(x) DMA_REG((x)*0x10 + 0x8)
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#define DMA_CUR_OFF_API(x) DMA_REG((x)*0x10 + 0xa)
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void dma_init(void)
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{
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/* DMA 1 (RIF Tx), 2 (RIF Rx) allocated to DSP, all others to ARM */
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writew(0x000c, DMA_REG(ALLOC_CONFIG));
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}
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