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 
18 struct 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  */
30 struct 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)
43 int dw_dma_probe(struct dw_dma_chip *chip);
44 int dw_dma_remove(struct dw_dma_chip *chip);
45 int idma32_dma_probe(struct dw_dma_chip *chip);
46 int idma32_dma_remove(struct dw_dma_chip *chip);
47 #else
dw_dma_probe(struct dw_dma_chip * chip)48 static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
dw_dma_remove(struct dw_dma_chip * chip)49 static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
idma32_dma_probe(struct dw_dma_chip * chip)50 static inline int idma32_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
idma32_dma_remove(struct dw_dma_chip * chip)51 static 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