#ifndef SAA713X_VAR_H
#define SAA713X_VAR_H

#include <sys/param.h>

#if defined(SAA_DSHM) && __FreeBSD_version < 502121
#error "FreeBSD version incompatible with SAA_DSHM, please refer to Makefile."
#endif

#if __FreeBSD_version > 502102
#define DVERSION	.d_version = D_VERSION,
#define DFLAGS
#else
#define DVERSION
#define DFLAGS		.d_flags = D_NOGIANT,
#endif

#if __FreeBSD_version > 502114
#define DPTYPE		struct cdev*
#else
#define DPTYPE		dev_t
#endif

extern devclass_t saa_devclass;

#define SCVF_ON			(1 << 0)
#define SCVF_OVERLAY		(1 << 1)
#define SCVF_CAPTURE		(1 << 2)
#define SCVF_DMA_PAUSED		(1 << 3)

#define SCAF_ON			(1 << 0)

struct saa_softc {
	device_t		sc_dev;
	device_t		sc_iicbus_dev;
	DPTYPE			sc_video_cdev;
	DPTYPE			sc_audio_cdev;

	struct resource 	*sc_base_res;
	bus_space_tag_t 	sc_base_bustag;
	bus_space_handle_t 	sc_base_bushandle;
	int			sc_base_rid;

	struct resource		*sc_intr_res;
	int			sc_intr_rid;
	void			*sc_intr_cookie;

	bus_dma_tag_t		sc_pta_tag;
	bus_dmamap_t		sc_pta_map;
	uint32_t		*sc_pta;
	uint32_t		sc_pta_paddr[SAA_DMA_NRCHANS];
	uint8_t			sc_pta_map_destroyflag;
	uint8_t			sc_pta_map_unloadflag;
	uint8_t			sc_pta_map_loadidx;
	uint8_t			sc_pta_map_loaderror;

	uint32_t		sc_video_flags;
	struct saa_video_opt	sc_video_opt;
	struct saa_video_std	sc_video_std;
	struct saa_video_spec 	sc_video_spec;

	/* 2 item array because we have two Tasks viz. A,B */
	bus_dma_tag_t		sc_video_capbuf_tag[2];
	bus_dmamap_t		sc_video_capbuf_map[2];
	uint8_t			sc_video_capbuf_map_destroyflag[2];
	uint8_t			sc_video_capbuf_map_unloadflag[2];
	void			*sc_video_capbuf[2];
	int			sc_video_capbuf_loadcount[2];
	uint8_t			sc_video_capbuf_allocflag[2];
	

				/* worst case limit: 1028
				 * 1024 for device, 3 for dirshm and
				 * 1 for packed pta
				 */
	bus_dma_segment_t	sc_capbuf_pgsegs[3][1028];
	int			sc_video_capbuf_sz[2];

	vm_object_t		sc_video_capbuf_shmobj[2];
	vm_offset_t 		sc_video_capbuf_shmaddr[2];
	int 			sc_video_capbuf_shmlen[2];

	pid_t			sc_video_capbuf_sigpid;

	struct saa_status	*sc_sts;	

	/* variables used for syncronisation with DMA callback */
	int			sc_video_capbuf_current;
	int			sc_capbuf_loaderror;
	int			sc_capbuf_loadidx;
	int			sc_capbuf_loadlen;

	/* Audio Section */
	struct saa_audio_opt	sc_audio_opt;
	struct saa_audio_spec	sc_audio_spec;
	uint32_t		sc_audio_flags;

	pid_t			sc_audio_capbuf_sigpid;

	int			sc_audio_capbuf_sz;
	bus_dma_tag_t		sc_audio_capbuf_tag;
	bus_dmamap_t		sc_audio_capbuf_map;
	uint8_t			sc_audio_capbuf_map_destroyflag;
	uint8_t			sc_audio_capbuf_map_unloadflag;
	void			*sc_audio_capbuf;
	int			sc_audio_capbuf_loadcount;
	uint8_t			sc_audio_capbuf_allocflag;

	uint32_t		sc_video_dmasave;
};

/* 
 * Skip skip_count bytes from segs and then fills pta with
 * remaining segs.
 */
void saa_build_pta(struct saa_softc *sc, 
			bus_dma_segment_t *segs, int nsegs, 
			uint32_t *pta);
			
#define REG_READB(r)		(bus_space_read_1(sc->sc_base_bustag, \
						  sc->sc_base_bushandle, \
						  (r)))

#define REG_WRITEB(r, v) 	(bus_space_write_1(sc->sc_base_bustag, \
						   sc->sc_base_bushandle, \
						   (r), (v)))

#define REG_READW(r)		(bus_space_read_2(sc->sc_base_bustag, \
						  sc->sc_base_bushandle, \
						  (r)))

#define REG_WRITEW(r, v) 	(bus_space_write_2(sc->sc_base_bustag, \
						   sc->sc_base_bushandle, \
						   (r), (v)))

#define REG_READ(r)	 	(bus_space_read_4(sc->sc_base_bustag, \
					   	  sc->sc_base_bushandle, \
					   	  (r)))

#define REG_WRITE(r, v)  	(bus_space_write_4(sc->sc_base_bustag, \
					    	  sc->sc_base_bushandle, \
					    	  (r), (v)))

#define REG_SETB(r, v)		(REG_WRITEB(r, REG_READB(r)  | (v))) 
#define REG_CLRB(r, m)		(REG_WRITEB(r, REG_READB(r) & (~m)))
#define REG_SETMB(r, m, v)	(REG_WRITEB(r, (REG_READB(r) & (~m)) | ((v) & (m))))

#define REG_SET(r, v)		(REG_WRITE(r, REG_READ(r)  | (v))) 
#define REG_CLR(r, m)		(REG_WRITE(r, REG_READ(r) & (~m)))
#define REG_SETM(r, m, v)	(REG_WRITE(r, (REG_READ(r) & (~m)) | ((v) & (m)))) 


#endif