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Nuttx/dma: add dmag link configure function 

Signed-off-by: zhangyuan7 <zhangyuan7@pinecone.net>
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
zhangyuan7 2019-07-25 20:26:13 +08:00 committed by Xiang Xiao
parent 596f52c3ee
commit 51475e4273
1 changed files with 48 additions and 0 deletions
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48
include/nuttx/dma/dma.h
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@ -40,6 +40,13 @@
#define DMA_DEV_TO_MEM 3
#define DMA_DEV_TO_DEV 4
#ifdef CONFIG_DMA_LINK
# define DMA_BLOCK_MODE 0
# define DMA_SRC_LINK_MODE 1
# define DMA_DST_LINK_MODE 2
# define DMA_DUAL_LINK_MODE 3
#endif
/****************************************************************************
* Name: DMA_GET_CHAN
*
@ -129,6 +136,21 @@
#define DMA_START_CYCLIC(chan, callback, arg, dst, src, len, period_len) \
(chan)->ops->start_cyclic(chan, callback, arg, dst, src, len, period_len)
/****************************************************************************
* Name: DMA_START_CYCLIC
*
* Description:
* Start the cyclic DMA transfer.
*
* Note: callback get called for each period length data DMA transfer.
*
****************************************************************************/
#ifdef CONFIG_DMA_LINK
# define DMA_START_LINK(chan, callback, arg, mode, link_cfg) \
(chan)->ops->start_link(chan, callback, arg, mode, link_cfg)
#endif
/****************************************************************************
* Name: DMA_PAUSE
*
@ -226,6 +248,26 @@ struct dma_config_s
unsigned int src_width;
};
#ifdef CONFIG_DMA_LINK
struct dma_link_s
{
uintptr_t addr;
union
{
unsigned int link_num;
unsigned int link_size;
};
};
struct dma_link_config_s
{
unsigned int dst_link_num;
unsigned int src_link_num;
FAR struct dma_link_s *dst_link;
FAR struct dma_link_s *src_link;
};
#endif
/* The DMA vtable */
struct dma_ops_s
@ -239,6 +281,12 @@ struct dma_ops_s
dma_callback_t callback, FAR void *arg,
uintptr_t dst, uintptr_t src,
size_t len, size_t period_len);
#ifdef CONFIG_DMA_LINK
CODE int (*start_link)(FAR struct dma_chan_s *chan,
dma_callback_t callback, FAR void *arg,
unsigned int work_mode,
FAR struct dma_link_config_s *cfg);
#endif
CODE int (*stop)(FAR struct dma_chan_s *chan);
CODE int (*pause)(FAR struct dma_chan_s *chan);
CODE int (*resume)(FAR struct dma_chan_s *chan);