1/*
2 * linux/arch/unicore32/include/mach/dma.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
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 __MACH_PUV3_DMA_H__
13#define __MACH_PUV3_DMA_H__
14
15/*
16 * The PKUnity has six internal DMA channels.
17 */
18#define MAX_DMA_CHANNELS	6
19
20typedef enum {
21	DMA_PRIO_HIGH = 0,
22	DMA_PRIO_MEDIUM = 1,
23	DMA_PRIO_LOW = 2
24} puv3_dma_prio;
25
26/*
27 * DMA registration
28 */
29
30extern int puv3_request_dma(char *name,
31			 puv3_dma_prio prio,
32			 void (*irq_handler)(int, void *),
33			 void (*err_handler)(int, void *),
34			 void *data);
35
36extern void puv3_free_dma(int dma_ch);
37
38static inline void puv3_stop_dma(int ch)
39{
40	writel(readl(DMAC_CONFIG(ch)) & ~DMAC_CONFIG_EN, DMAC_CONFIG(ch));
41}
42
43static inline void puv3_resume_dma(int ch)
44{
45	writel(readl(DMAC_CONFIG(ch)) | DMAC_CONFIG_EN, DMAC_CONFIG(ch));
46}
47
48#endif /* __MACH_PUV3_DMA_H__ */
49