/*	$Id: spivar.h,v 1.1 2008/03/04 16:09:35 nbrk Exp $	*/
#ifndef _DEV_SPIVAR_H_
#define _DEV_SPIVAR_H_

/*
 * SPI bus interface.
 */

struct spi_bus {
	void	*bus_cookie;

	uint32_t	bus_speed;
	int	(*bus_shift_1)(void *, uint8_t);
#if 0
	uint16_t	(*bus_shift_2)(void *, uint16_t);
	uint32_t	(*bus_shift_4)(void *, uint32_t);
#endif

	int	(*bus_acquire)(void *);
	void	(*bus_release)(void *);
};

/*
 * Methods.
 */
int		spi_shift_1(void *, uint8_t);
uint16_t	spi_shift_2(void *, uint16_t);
uint32_t	spi_shift_4(void *, uint32_t);
int	spi_acquire(void *);
void	spi_release(void *);
 
/*
 * Attachment.
 */
struct spibus_attach_args {
	void	*sba_spisc;
	struct spi_bus	*sba_bus;
};

int	spibus_print(void *, const char *);

#endif /* !_DEV_SPIVAR_H_ */