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/*
* linux/arch/unicore32/include/mach/dma.h
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*
* 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 __MACH_PUV3_DMA_H__
#define __MACH_PUV3_DMA_H__
/*
* The PKUnity has six internal DMA channels.
*/
#define MAX_DMA_CHANNELS 6
typedef enum {
DMA_PRIO_HIGH = 0,
DMA_PRIO_MEDIUM = 1,
DMA_PRIO_LOW = 2
} puv3_dma_prio;
/*
* DMA registration
*/
extern int puv3_request_dma(char *name,
puv3_dma_prio prio,
void (*irq_handler)(int, void *),
void (*err_handler)(int, void *),
void *data);
extern void puv3_free_dma(int dma_ch);
static inline void puv3_stop_dma(int ch)
{
writel(readl(DMAC_CONFIG(ch)) & ~DMAC_CONFIG_EN, DMAC_CONFIG(ch));
}
static inline void puv3_resume_dma(int ch)
{
writel(readl(DMAC_CONFIG(ch)) | DMAC_CONFIG_EN, DMAC_CONFIG(ch));
}
#endif /* __MACH_PUV3_DMA_H__ */