55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Driver for the Synopsys DesignWare DMA Controller
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*
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* Copyright (C) 2007 Atmel Corporation
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* Copyright (C) 2010-2011 ST Microelectronics
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* Copyright (C) 2014 Intel Corporation
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*/
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#ifndef _DMA_DW_H
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#define _DMA_DW_H
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/dmaengine.h>
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#include <linux/platform_data/dma-dw.h>
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struct dw_dma;
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/**
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* struct dw_dma_chip - representation of DesignWare DMA controller hardware
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* @dev: struct device of the DMA controller
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* @id: instance ID
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* @irq: irq line
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* @regs: memory mapped I/O space
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* @clk: hclk clock
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* @dw: struct dw_dma that is filed by dw_dma_probe()
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* @pdata: pointer to platform data
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*/
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struct dw_dma_chip {
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struct device *dev;
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int id;
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int irq;
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void __iomem *regs;
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struct clk *clk;
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struct dw_dma *dw;
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const struct dw_dma_platform_data *pdata;
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};
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/* Export to the platform drivers */
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#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
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int dw_dma_probe(struct dw_dma_chip *chip);
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int dw_dma_remove(struct dw_dma_chip *chip);
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int idma32_dma_probe(struct dw_dma_chip *chip);
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int idma32_dma_remove(struct dw_dma_chip *chip);
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#else
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static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
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static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
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static inline int idma32_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
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static inline int idma32_dma_remove(struct dw_dma_chip *chip) { return 0; }
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#endif /* CONFIG_DW_DMAC_CORE */
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#endif /* _DMA_DW_H */
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