57 	int (*request)(struct dma_channel *chan);
58 	void (*free)(struct dma_channel *chan);
60 	int (*get_residue)(struct dma_channel *chan);
61 	int (*xfer)(struct dma_channel *chan);
62 	int (*configure)(struct dma_channel *chan, unsigned long flags);
63 	int (*extend)(struct dma_channel *chan, unsigned long op, void *param);
69 	unsigned int chan;		/* DMAC channel number */  member
112 extern int dma_xfer(unsigned int chan, unsigned long from,
115 #define dma_write(chan, from, to, size)	\  argument
116 	dma_xfer(chan, from, to, size, DMA_MODE_WRITE)
117 #define dma_write_page(chan, from, to)	\  argument
118 	dma_write(chan, from, to, PAGE_SIZE)
120 #define dma_read(chan, from, to, size)	\  argument
121 	dma_xfer(chan, from, to, size, DMA_MODE_READ)
122 #define dma_read_page(chan, from, to)	\  argument
123 	dma_read(chan, from, to, PAGE_SIZE)
127 extern int get_dma_residue(unsigned int chan);
128 extern struct dma_info *get_dma_info(unsigned int chan);
129 extern struct dma_channel *get_dma_channel(unsigned int chan);
130 extern void dma_wait_for_completion(unsigned int chan);
131 extern void dma_configure_channel(unsigned int chan, unsigned long flags);
137 extern int dma_extend(unsigned int chan, unsigned long op, void *param);