/* * Definitions shared between dma-sa1100.c and dma-sa1111.c * (C) 2000 Nicolas Pitre <nico@cam.org> * * 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. */#include <linux/config.h>/* * DMA buffer structure */typedef struct dma_buf_s {	int size;		/* buffer size */	dma_addr_t dma_start;	/* starting DMA address */	dma_addr_t dma_ptr;	/* next DMA pointer to use */	int ref;		/* number of DMA references */	void *id;		/* to identify buffer from outside */	struct dma_buf_s *next;	/* next buffer to process */} dma_buf_t;/* * DMA channel structure. */typedef struct {	unsigned int in_use;	/* Device is allocated */	const char *device_id;	/* Device name */	dma_device_t device;	/* ... to which this channel is attached */	dma_buf_t *head;	/* where to insert buffers */	dma_buf_t *tail;	/* where to remove buffers */	dma_buf_t *curr;	/* buffer currently DMA'ed */	int stopped;		/* 1 if DMA is stalled */	dma_regs_t *regs;	/* points to appropriate DMA registers */	int irq;		/* IRQ used by the channel */	dma_callback_t callback; /* ... to call when buffers are done */	int spin_size;		/* > 0 when DMA should spin when no more buffer */	dma_addr_t spin_addr;	/* DMA address to spin onto */	int spin_ref;		/* number of spinning references */#ifdef CONFIG_SA1111	int dma_a, dma_b, last_dma; /* SA-1111 specific */#endif} sa1100_dma_t;extern sa1100_dma_t dma_chan[MAX_SA1100_DMA_CHANNELS];int start_sa1111_sac_dma(sa1100_dma_t *dma, dma_addr_t dma_ptr, size_t size);int sa1111_dma_get_current(dmach_t channel, void **buf_id, dma_addr_t *addr);int sa1111_dma_stop(dmach_t channel);int sa1111_dma_resume(dmach_t channel);void sa1111_reset_sac_dma(dmach_t channel);void sa1111_cleanup_sac_dma(dmach_t channel);void sa1100_dma_done (sa1100_dma_t *dma);#ifdef CONFIG_SA1111#define channel_is_sa1111_sac(ch) \	((ch) >= SA1111_SAC_DMA_BASE && \	 (ch) <  SA1111_SAC_DMA_BASE + SA1111_SAC_DMA_CHANNELS)#else#define channel_is_sa1111_sac(ch) (0)#endif