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