dma-imx.h

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/*
 * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __ASM_ARCH_MXC_DMA_H__
#define __ASM_ARCH_MXC_DMA_H__

#include <linux/scatterlist.h>
#include <linux/device.h>
#include <linux/dmaengine.h>

/*
 * This enumerates peripheral types. Used for SDMA.
 */
enum sdma_peripheral_type {
    IMX_DMATYPE_SSI,    /* MCU domain SSI */
    IMX_DMATYPE_SSI_SP, /* Shared SSI */
    IMX_DMATYPE_MMC,    /* MMC */
    IMX_DMATYPE_SDHC,   /* SDHC */
    IMX_DMATYPE_UART,   /* MCU domain UART */
    IMX_DMATYPE_UART_SP,    /* Shared UART */
    IMX_DMATYPE_FIRI,   /* FIRI */
    IMX_DMATYPE_CSPI,   /* MCU domain CSPI */
    IMX_DMATYPE_CSPI_SP,    /* Shared CSPI */
    IMX_DMATYPE_SIM,    /* SIM */
    IMX_DMATYPE_ATA,    /* ATA */
    IMX_DMATYPE_CCM,    /* CCM */
    IMX_DMATYPE_EXT,    /* External peripheral */
    IMX_DMATYPE_MSHC,   /* Memory Stick Host Controller */
    IMX_DMATYPE_MSHC_SP,    /* Shared Memory Stick Host Controller */
    IMX_DMATYPE_DSP,    /* DSP */
    IMX_DMATYPE_MEMORY, /* Memory */
    IMX_DMATYPE_FIFO_MEMORY,/* FIFO type Memory */
    IMX_DMATYPE_SPDIF,  /* SPDIF */
    IMX_DMATYPE_IPU_MEMORY, /* IPU Memory */
    IMX_DMATYPE_ASRC,   /* ASRC */
    IMX_DMATYPE_ESAI,   /* ESAI */
};

enum imx_dma_prio {
    DMA_PRIO_HIGH = 0,
    DMA_PRIO_MEDIUM = 1,
    DMA_PRIO_LOW = 2
};

struct imx_dma_data {
    int dma_request; /* DMA request line */
    enum sdma_peripheral_type peripheral_type;
    int priority;
};

static inline int imx_dma_is_ipu(struct dma_chan *chan)
{
    return !strcmp(dev_name(chan->device->dev), "ipu-core");
}

static inline int imx_dma_is_general_purpose(struct dma_chan *chan)
{
    return strstr(dev_name(chan->device->dev), "sdma") ||
        !strcmp(dev_name(chan->device->dev), "imx-dma");
}

#endif