dma-ep93xx.h

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#ifndef __ASM_ARCH_DMA_H
#define __ASM_ARCH_DMA_H

#include <linux/types.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>

/*
 * M2P channels.
 *
 * Note that these values are also directly used for setting the PPALLOC
 * register.
 */
#define EP93XX_DMA_I2S1     0
#define EP93XX_DMA_I2S2     1
#define EP93XX_DMA_AAC1     2
#define EP93XX_DMA_AAC2     3
#define EP93XX_DMA_AAC3     4
#define EP93XX_DMA_I2S3     5
#define EP93XX_DMA_UART1    6
#define EP93XX_DMA_UART2    7
#define EP93XX_DMA_UART3    8
#define EP93XX_DMA_IRDA     9
/* M2M channels */
#define EP93XX_DMA_SSP      10
#define EP93XX_DMA_IDE      11

struct ep93xx_dma_data {
    int             port;
    enum dma_transfer_direction direction;
    const char          *name;
};

struct ep93xx_dma_chan_data {
    const char          *name;
    void __iomem            *base;
    int             irq;
};

struct ep93xx_dma_platform_data {
    struct ep93xx_dma_chan_data *channels;
    size_t              num_channels;
};

static inline bool ep93xx_dma_chan_is_m2p(struct dma_chan *chan)
{
    return !strcmp(dev_name(chan->device->dev), "ep93xx-dma-m2p");
}

static inline enum dma_transfer_direction
ep93xx_dma_chan_direction(struct dma_chan *chan)
{
    if (!ep93xx_dma_chan_is_m2p(chan))
        return DMA_NONE;

    /* even channels are for TX, odd for RX */
    return (chan->chan_id % 2 == 0) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
}

#endif /* __ASM_ARCH_DMA_H */