arch/arm/plat-mxc/include/mach/dma.h

   1 /*
   2  * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef __ASM_ARCH_MXC_DMA_H__
  10 #define __ASM_ARCH_MXC_DMA_H__
  11
  12 #include <linux/scatterlist.h>
  13 #include <linux/device.h>
  14 #include <linux/dmaengine.h>
  15
  16 /*
  17  * This enumerates peripheral types. Used for SDMA.
  18  */
  19 enum sdma_peripheral_type {
  20         IMX_DMATYPE_SSI,        /* MCU domain SSI */
  21         IMX_DMATYPE_SSI_SP,     /* Shared SSI */
  22         IMX_DMATYPE_MMC,        /* MMC */
  23         IMX_DMATYPE_SDHC,       /* SDHC */
  24         IMX_DMATYPE_UART,       /* MCU domain UART */
  25         IMX_DMATYPE_UART_SP,    /* Shared UART */
  26         IMX_DMATYPE_FIRI,       /* FIRI */
  27         IMX_DMATYPE_CSPI,       /* MCU domain CSPI */
  28         IMX_DMATYPE_CSPI_SP,    /* Shared CSPI */
  29         IMX_DMATYPE_SIM,        /* SIM */
  30         IMX_DMATYPE_ATA,        /* ATA */
  31         IMX_DMATYPE_CCM,        /* CCM */
  32         IMX_DMATYPE_EXT,        /* External peripheral */
  33         IMX_DMATYPE_MSHC,       /* Memory Stick Host Controller */
  34         IMX_DMATYPE_MSHC_SP,    /* Shared Memory Stick Host Controller */
  35         IMX_DMATYPE_DSP,        /* DSP */
  36         IMX_DMATYPE_MEMORY,     /* Memory */
  37         IMX_DMATYPE_FIFO_MEMORY,/* FIFO type Memory */
  38         IMX_DMATYPE_SPDIF,      /* SPDIF */
  39         IMX_DMATYPE_IPU_MEMORY, /* IPU Memory */
  40         IMX_DMATYPE_ASRC,       /* ASRC */
  41         IMX_DMATYPE_ESAI,       /* ESAI */
  42 };
  43
  44 enum imx_dma_prio {
  45         DMA_PRIO_HIGH = 0,
  46         DMA_PRIO_MEDIUM = 1,
  47         DMA_PRIO_LOW = 2
  48 };
  49
  50 struct imx_dma_data {
  51         int dma_request; /* DMA request line */
  52         enum sdma_peripheral_type peripheral_type;
  53         int priority;
  54 };
  55
  56 static inline int imx_dma_is_ipu(struct dma_chan *chan)
  57 {
  58         return !strcmp(dev_name(chan->device->dev), "ipu-core");
  59 }
  60
  61 static inline int imx_dma_is_general_purpose(struct dma_chan *chan)
  62 {
  63         return !strcmp(dev_name(chan->device->dev), "imx31-sdma") ||
  64                 !strcmp(dev_name(chan->device->dev), "imx35-sdma") ||
  65                 !strcmp(dev_name(chan->device->dev), "imx-dma");
  66 }
  67
  68 #endif