1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 /* 1 /*
3 * Driver for the Synopsys DesignWare DMA Cont 2 * Driver for the Synopsys DesignWare DMA Controller
4 * 3 *
5 * Copyright (C) 2007 Atmel Corporation 4 * Copyright (C) 2007 Atmel Corporation
6 * Copyright (C) 2010-2011 ST Microelectronics 5 * Copyright (C) 2010-2011 ST Microelectronics
7 * Copyright (C) 2014 Intel Corporation 6 * Copyright (C) 2014 Intel Corporation
>> 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.
8 */ 11 */
9 #ifndef _DMA_DW_H 12 #ifndef _DMA_DW_H
10 #define _DMA_DW_H 13 #define _DMA_DW_H
11 14
12 #include <linux/clk.h> 15 #include <linux/clk.h>
13 #include <linux/device.h> 16 #include <linux/device.h>
14 #include <linux/dmaengine.h> 17 #include <linux/dmaengine.h>
15 18
16 #include <linux/platform_data/dma-dw.h> 19 #include <linux/platform_data/dma-dw.h>
17 20
18 struct dw_dma; 21 struct dw_dma;
19 22
20 /** 23 /**
21 * struct dw_dma_chip - representation of Desi 24 * struct dw_dma_chip - representation of DesignWare DMA controller hardware
22 * @dev: struct device of the D 25 * @dev: struct device of the DMA controller
23 * @id: instance ID <<
24 * @irq: irq line 26 * @irq: irq line
25 * @regs: memory mapped I/O spac 27 * @regs: memory mapped I/O space
26 * @clk: hclk clock 28 * @clk: hclk clock
27 * @dw: struct dw_dma that is 29 * @dw: struct dw_dma that is filed by dw_dma_probe()
28 * @pdata: pointer to platform da <<
29 */ 30 */
30 struct dw_dma_chip { 31 struct dw_dma_chip {
31 struct device *dev; 32 struct device *dev;
32 int id; <<
33 int irq; 33 int irq;
34 void __iomem *regs; 34 void __iomem *regs;
35 struct clk *clk; 35 struct clk *clk;
36 struct dw_dma *dw; 36 struct dw_dma *dw;
37 <<
38 const struct dw_dma_platform_data <<
39 }; 37 };
40 38
41 /* Export to the platform drivers */ 39 /* Export to the platform drivers */
42 #if IS_ENABLED(CONFIG_DW_DMAC_CORE) !! 40 int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata);
43 int dw_dma_probe(struct dw_dma_chip *chip); <<
44 int dw_dma_remove(struct dw_dma_chip *chip); 41 int dw_dma_remove(struct dw_dma_chip *chip);
45 int idma32_dma_probe(struct dw_dma_chip *chip) !! 42
46 int idma32_dma_remove(struct dw_dma_chip *chip !! 43 /* DMA API extensions */
47 #else !! 44 struct dw_desc;
48 static inline int dw_dma_probe(struct dw_dma_c !! 45
49 static inline int dw_dma_remove(struct dw_dma_ !! 46 struct dw_cyclic_desc {
50 static inline int idma32_dma_probe(struct dw_d !! 47 struct dw_desc **desc;
51 static inline int idma32_dma_remove(struct dw_ !! 48 unsigned long periods;
52 #endif /* CONFIG_DW_DMAC_CORE */ !! 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);
53 63
54 #endif /* _DMA_DW_H */ 64 #endif /* _DMA_DW_H */
55 65
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