LXR linux/include/linux/dma/dw.h

   1/*
   2 * Driver for the Synopsys DesignWare DMA Controller
   3 *
   4 * Copyright (C) 2007 Atmel Corporation
   5 * Copyright (C) 2010-2011 ST Microelectronics
   6 * Copyright (C) 2014 Intel Corporation
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12#ifndef _DMA_DW_H
  13#define _DMA_DW_H
  14
  15#include <linux/clk.h>
  16#include <linux/device.h>
  17#include <linux/dmaengine.h>
  18
  19#include <linux/platform_data/dma-dw.h>
  20
  21struct dw_dma;
  22
  23/**
  24 * struct dw_dma_chip - representation of DesignWare DMA controller hardware
  25 * @dev:                struct device of the DMA controller
  26 * @id:                 instance ID
  27 * @irq:                irq line
  28 * @regs:               memory mapped I/O space
  29 * @clk:                hclk clock
  30 * @dw:                 struct dw_dma that is filed by dw_dma_probe()
  31 * @pdata:              pointer to platform data
  32 */
  33struct dw_dma_chip {
  34        struct device   *dev;
  35        int             id;
  36        int             irq;
  37        void __iomem    *regs;
  38        struct clk      *clk;
  39        struct dw_dma   *dw;
  40
  41        const struct dw_dma_platform_data       *pdata;
  42};
  43
  44/* Export to the platform drivers */
  45#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
  46int dw_dma_probe(struct dw_dma_chip *chip);
  47int dw_dma_remove(struct dw_dma_chip *chip);
  48#else
  49static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
  50static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
  51#endif /* CONFIG_DW_DMAC_CORE */
  52
  53#endif /* _DMA_DW_H */
  54