dw.h

 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 */