[mirror_ubuntu-bionic-kernel.git] / include / linux / dma / dw.h

/*
 * Driver for the Synopsys DesignWare DMA Controller
 *
 * Copyright (C) 2007 Atmel Corporation
 * Copyright (C) 2010-2011 ST Microelectronics
 * Copyright (C) 2014 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _DMA_DW_H
#define _DMA_DW_H

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dmaengine.h>

#include <linux/platform_data/dma-dw.h>

struct dw_dma;

/**
 * struct dw_dma_chip - representation of DesignWare DMA controller hardware
 * @dev:		struct device of the DMA controller
 * @irq:		irq line
 * @regs:		memory mapped I/O space
 * @clk:		hclk clock
 * @dw:			struct dw_dma that is filed by dw_dma_probe()
 */
struct dw_dma_chip {
	struct device	*dev;
	int		irq;
	void __iomem	*regs;
	struct clk	*clk;
	struct dw_dma	*dw;
};

/* Export to the platform drivers */
int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata);
int dw_dma_remove(struct dw_dma_chip *chip);

/* DMA API extensions */
struct dw_desc;

struct dw_cyclic_desc {
	struct dw_desc	**desc;
	unsigned long	periods;
	void		(*period_callback)(void *param);
	void		*period_callback_param;
};

struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
		dma_addr_t buf_addr, size_t buf_len, size_t period_len,
		enum dma_transfer_direction direction);
void dw_dma_cyclic_free(struct dma_chan *chan);
int dw_dma_cyclic_start(struct dma_chan *chan);
void dw_dma_cyclic_stop(struct dma_chan *chan);

dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan);

dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan);

#endif /* _DMA_DW_H */
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>
2a52f6e4 AS	16	#include <linux/device.h>
3d588f83 AS	17	#include <linux/dmaengine.h>
3d588f83 AS	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()
	30	*/
	31	struct dw_dma_chip {
	32	struct device *dev;
	33	int irq;
	34	void __iomem *regs;
	35	struct clk *clk;
	36	struct dw_dma *dw;
	37	};
	38
	39	/* Export to the platform drivers */
	40	int dw_dma_probe(struct dw_dma_chip chip, struct dw_dma_platform_data pdata);
	41	int dw_dma_remove(struct dw_dma_chip *chip);
	42
3d588f83 AS	43	/* DMA API extensions */
	44	struct dw_desc;
	45
	46	struct dw_cyclic_desc {
	47	struct dw_desc **desc;
	48	unsigned long periods;
	49	void (period_callback)(void param);
	50	void *period_callback_param;
	51	};
	52
	53	struct dw_cyclic_desc dw_dma_cyclic_prep(struct dma_chan chan,
	54	dma_addr_t buf_addr, size_t buf_len, size_t period_len,
	55	enum dma_transfer_direction direction);
	56	void dw_dma_cyclic_free(struct dma_chan *chan);
	57	int dw_dma_cyclic_start(struct dma_chan *chan);
	58	void dw_dma_cyclic_stop(struct dma_chan *chan);
	59
	60	dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan);
	61
	62	dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan);
	63
	64	#endif /* _DMA_DW_H */