53 строки
1.2 KiB
C
53 строки
1.2 KiB
C
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/*
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* Header for the SUDMAC driver
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*
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* Copyright (C) 2013 Renesas Solutions Corp.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*/
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#ifndef SUDMAC_H
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#define SUDMAC_H
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#include <linux/dmaengine.h>
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#include <linux/shdma-base.h>
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#include <linux/types.h>
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/* Used by slave DMA clients to request DMA to/from a specific peripheral */
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struct sudmac_slave {
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struct shdma_slave shdma_slave; /* Set by the platform */
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};
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/*
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* Supplied by platforms to specify, how a DMA channel has to be configured for
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* a certain peripheral
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*/
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struct sudmac_slave_config {
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int slave_id;
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};
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struct sudmac_channel {
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unsigned long offset;
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unsigned long config;
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unsigned long wait; /* The configuable range is 0 to 3 */
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unsigned long dint_end_bit;
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};
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struct sudmac_pdata {
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const struct sudmac_slave_config *slave;
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int slave_num;
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const struct sudmac_channel *channel;
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int channel_num;
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};
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/* Definitions for the sudmac_channel.config */
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#define SUDMAC_TX_BUFFER_MODE BIT(0)
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#define SUDMAC_RX_END_MODE BIT(1)
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/* Definitions for the sudmac_channel.dint_end_bit */
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#define SUDMAC_DMA_BIT_CH0 BIT(0)
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#define SUDMAC_DMA_BIT_CH1 BIT(1)
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#endif
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