1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Driver for the Synopsys DesignWare DMA Controller
4 *
5 * Copyright (C) 2007 Atmel Corporation
6 * Copyright (C) 2010-2011 ST Microelectronics
7 * Copyright (C) 2014 Intel Corporation
8 */
9#ifndef _DMA_DW_H
10#define _DMA_DW_H
11
12#include <linux/clk.h>
13#include <linux/device.h>
14#include <linux/dmaengine.h>
15
16#include <linux/platform_data/dma-dw.h>
17
18struct dw_dma;
19
20/**
21 * struct dw_dma_chip - representation of DesignWare DMA controller hardware
22 * @dev: struct device of the DMA controller
23 * @id: instance ID
24 * @irq: irq line
25 * @regs: memory mapped I/O space
26 * @clk: hclk clock
27 * @dw: struct dw_dma that is filed by dw_dma_probe()
28 * @pdata: pointer to platform data
29 */
30struct dw_dma_chip {
31 struct device *dev;
32 int id;
33 int irq;
34 void __iomem *regs;
35 struct clk *clk;
36 struct dw_dma *dw;
37
38 const struct dw_dma_platform_data *pdata;
39};
40
41/* Export to the platform drivers */
42#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
43int dw_dma_probe(struct dw_dma_chip *chip);
44int dw_dma_remove(struct dw_dma_chip *chip);
45int idma32_dma_probe(struct dw_dma_chip *chip);
46int idma32_dma_remove(struct dw_dma_chip *chip);
47#else
48static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
49static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
50static inline int idma32_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
51static inline int idma32_dma_remove(struct dw_dma_chip *chip) { return 0; }
52#endif /* CONFIG_DW_DMAC_CORE */
53
54#endif /* _DMA_DW_H */
55