projects / mirror_ubuntu-bionic-kernel.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 | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | */ | |
| 11 | #ifndef _DMA_DW_H | |
| 12 | #define _DMA_DW_H | |
| 13 | ||
| 14 | #include <linux/dmaengine.h> | |
| 15 | ||
| 16 | /* DMA API extensions */ | |
| 17 | struct dw_desc; | |
| 18 | ||
| 19 | struct dw_cyclic_desc { | |
| 20 | struct dw_desc **desc; | |
| 21 | unsigned long periods; | |
| 22 | void (*period_callback)(void *param); | |
| 23 | void *period_callback_param; | |
| 24 | }; | |
| 25 | ||
| 26 | struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan, | |
| 27 | dma_addr_t buf_addr, size_t buf_len, size_t period_len, | |
| 28 | enum dma_transfer_direction direction); | |
| 29 | void dw_dma_cyclic_free(struct dma_chan *chan); | |
| 30 | int dw_dma_cyclic_start(struct dma_chan *chan); | |
| 31 | void dw_dma_cyclic_stop(struct dma_chan *chan); | |
| 32 | ||
| 33 | dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan); | |
| 34 | ||
| 35 | dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan); | |
| 36 | ||
| 37 | #endif /* _DMA_DW_H */ |