projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3d588f83 AS |
1 | /* |
| 2 | * Driver for the Synopsys DesignWare DMA Controller | |
| 3 | * | |
| 4 | * Copyright (C) 2007 Atmel Corporation | |
| 5 | * Copyright (C) 2010-2011 ST Microelectronics | |
| 2a52f6e4 | 6 | * Copyright (C) 2014 Intel Corporation |
| 3d588f83 AS |
7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | #ifndef _DMA_DW_H | |
| 13 | #define _DMA_DW_H | |
| 14 | ||
| 2a52f6e4 AS |
15 | #include <linux/clk.h> |
| 16 | #include <linux/device.h> | |
| 3d588f83 AS |
17 | #include <linux/dmaengine.h> |
| 18 | ||
| 2a52f6e4 AS |
19 | #include <linux/platform_data/dma-dw.h> |
| 20 | ||
| 21 | struct dw_dma; | |
| 22 | ||
| 23 | /** | |
| 24 | * struct dw_dma_chip - representation of DesignWare DMA controller hardware | |
| 25 | * @dev: struct device of the DMA controller | |
| 26 | * @irq: irq line | |
| 27 | * @regs: memory mapped I/O space | |
| 28 | * @clk: hclk clock | |
| 29 | * @dw: struct dw_dma that is filed by dw_dma_probe() | |
| 3a14c66d | 30 | * @pdata: pointer to platform data |
| 2a52f6e4 AS |
31 | */ |
| 32 | struct dw_dma_chip { | |
| 33 | struct device *dev; | |
| 34 | int irq; | |
| 35 | void __iomem *regs; | |
| 36 | struct clk *clk; | |
| 37 | struct dw_dma *dw; | |
| 3a14c66d AS |
38 | |
| 39 | const struct dw_dma_platform_data *pdata; | |
| 2a52f6e4 AS |
40 | }; |
| 41 | ||
| 42 | /* Export to the platform drivers */ | |
| 3a14c66d | 43 | int dw_dma_probe(struct dw_dma_chip *chip); |
| 2a52f6e4 AS |
44 | int dw_dma_remove(struct dw_dma_chip *chip); |
| 45 | ||
| 3d588f83 AS |
46 | /* DMA API extensions */ |
| 47 | struct dw_desc; | |
| 48 | ||
| 49 | struct dw_cyclic_desc { | |
| 50 | struct dw_desc **desc; | |
| 51 | unsigned long periods; | |
| 52 | void (*period_callback)(void *param); | |
| 53 | void *period_callback_param; | |
| 54 | }; | |
| 55 | ||
| 56 | struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan, | |
| 57 | dma_addr_t buf_addr, size_t buf_len, size_t period_len, | |
| 58 | enum dma_transfer_direction direction); | |
| 59 | void dw_dma_cyclic_free(struct dma_chan *chan); | |
| 60 | int dw_dma_cyclic_start(struct dma_chan *chan); | |
| 61 | void dw_dma_cyclic_stop(struct dma_chan *chan); | |
| 62 | ||
| 63 | dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan); | |
| 64 | ||
| 65 | dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan); | |
| 66 | ||
| 67 | #endif /* _DMA_DW_H */ |