/*
 *   Copyright (C) 2012 Lorenz Meier. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the author or the names of contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Driver for the Meas Spec MS5611 barometric pressure sensor
 */

#include <sys/ioctl.h>

#define _MS5611BASE	0x6A00
#define MS5611C(_x)	_IOC(_MS5611BASE, _x)

/* 
 * Sets the sensor internal sampling rate, and if a buffer
 * has been configured, the rate at which entries will be
 * added to the buffer.
 */
#define MS5611_SETRATE		MS5611C(1)

/* set rate (configuration A register */
#define MS5611_RATE_0_75HZ		(0 << 2) /* 0.75 Hz */

/*
 * Sets the sensor internal range.
 */
#define MS5611_SETRANGE		MS5611C(2)

#define MS5611_RANGE_0_88GA			(0 << 5)

/*
 * Sets the address of a shared MS5611_buffer
 * structure that is maintained by the driver.
 *
 * If zero is passed as the address, disables
 * the buffer updating.
 */
#define MS5611_SETBUFFER	MS5611C(3)

struct ms5611_buffer {
	uint32_t	size;		/* number of entries in the samples[] array */
	uint32_t	next;		/* the next entry that will be populated */
	struct {
		uint32_t	pressure;
		uint16_t temperature;
	} samples[];
};

extern int	ms5611_attach(struct i2c_dev_s *i2c);