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
48 static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
49 static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
50 static inline int idma32_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
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
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