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64 lines
1.7 KiB
64 lines
1.7 KiB
/* |
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* Driver for the Synopsys DesignWare DMA Controller |
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* |
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* Copyright (C) 2007 Atmel Corporation |
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* Copyright (C) 2010-2011 ST Microelectronics |
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* Copyright (C) 2014 Intel Corporation |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#ifndef _DMA_DW_H |
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#define _DMA_DW_H |
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#include <linux/clk.h> |
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#include <linux/device.h> |
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#include <linux/dmaengine.h> |
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#include <linux/platform_data/dma-dw.h> |
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struct dw_dma; |
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/** |
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* struct dw_dma_chip - representation of DesignWare DMA controller hardware |
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* @dev: struct device of the DMA controller |
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* @irq: irq line |
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* @regs: memory mapped I/O space |
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* @clk: hclk clock |
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* @dw: struct dw_dma that is filed by dw_dma_probe() |
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*/ |
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struct dw_dma_chip { |
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struct device *dev; |
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int irq; |
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void __iomem *regs; |
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struct clk *clk; |
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struct dw_dma *dw; |
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}; |
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/* Export to the platform drivers */ |
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int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata); |
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int dw_dma_remove(struct dw_dma_chip *chip); |
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/* DMA API extensions */ |
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struct dw_desc; |
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struct dw_cyclic_desc { |
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struct dw_desc **desc; |
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unsigned long periods; |
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void (*period_callback)(void *param); |
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void *period_callback_param; |
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}; |
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struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan, |
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dma_addr_t buf_addr, size_t buf_len, size_t period_len, |
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enum dma_transfer_direction direction); |
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void dw_dma_cyclic_free(struct dma_chan *chan); |
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int dw_dma_cyclic_start(struct dma_chan *chan); |
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void dw_dma_cyclic_stop(struct dma_chan *chan); |
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dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan); |
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dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan); |
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#endif /* _DMA_DW_H */
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