/*
 $License:
    Copyright (C) 2011 InvenSense Corporation, All Rights Reserved.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  $
 */

#ifndef __MPU_H_
#define __MPU_H_

#include <linux/types.h>
#include <linux/ioctl.h>

/* Number of axes on each sensor */
#define GYRO_NUM_AXES               (3)
#define ACCEL_NUM_AXES              (3)
#define COMPASS_NUM_AXES            (3)

struct mpu_read_write {
	/* Memory address or register address depending on ioctl */
	unsigned short address;
	unsigned short length;
	unsigned char *data;
};

enum mpuirq_data_type {
	MPUIRQ_DATA_TYPE_MPU_IRQ,
	MPUIRQ_DATA_TYPE_SLAVE_IRQ,
	MPUIRQ_DATA_TYPE_PM_EVENT,
	MPUIRQ_DATA_TYPE_NUM_TYPES,
};

/* User space PM event notification */
#define MPU_PM_EVENT_SUSPEND_PREPARE (3)
#define MPU_PM_EVENT_POST_SUSPEND    (4)

struct mpuirq_data {
	int interruptcount;
	unsigned long long irqtime;
	int data_type;
	long data;
};

enum ext_slave_config_key {
	MPU_SLAVE_CONFIG_ODR_SUSPEND,
	MPU_SLAVE_CONFIG_ODR_RESUME,
	MPU_SLAVE_CONFIG_FSR_SUSPEND,
	MPU_SLAVE_CONFIG_FSR_RESUME,
	MPU_SLAVE_CONFIG_MOT_THS,
	MPU_SLAVE_CONFIG_NMOT_THS,
	MPU_SLAVE_CONFIG_MOT_DUR,
	MPU_SLAVE_CONFIG_NMOT_DUR,
	MPU_SLAVE_CONFIG_IRQ_SUSPEND,
	MPU_SLAVE_CONFIG_IRQ_RESUME,
	MPU_SLAVE_WRITE_REGISTERS,
	MPU_SLAVE_READ_REGISTERS,
	/* AMI 306 specific config keys */
	MPU_SLAVE_PARAM,
	MPU_SLAVE_WINDOW,
	MPU_SLAVE_READWINPARAMS,
	MPU_SLAVE_SEARCHOFFSET,
	/* AKM specific config keys */
	MPU_SLAVE_READ_SCALE,
	/* YAS specific config keys */
	MPU_SLAVE_OFFSET_VALS,
	MPU_SLAVE_RANGE_CHECK,

	MPU_SLAVE_CONFIG_NUM_CONFIG_KEYS,
};

/* For the MPU_SLAVE_CONFIG_IRQ_SUSPEND and MPU_SLAVE_CONFIG_IRQ_RESUME */
enum ext_slave_config_irq_type {
	MPU_SLAVE_IRQ_TYPE_NONE,
	MPU_SLAVE_IRQ_TYPE_MOTION,
	MPU_SLAVE_IRQ_TYPE_DATA_READY,
};

/* Structure for the following IOCTS's
 * MPU_CONFIG_ACCEL
 * MPU_CONFIG_COMPASS
 * MPU_CONFIG_PRESSURE
 * MPU_GET_CONFIG_ACCEL
 * MPU_GET_CONFIG_COMPASS
 * MPU_GET_CONFIG_PRESSURE
 *
 * @key one of enum ext_slave_config_key
 * @len length of data pointed to by data
 * @apply zero if communication with the chip is not necessary, false otherwise
 *        This flag can be used to select cached data or to refresh cashed data
 *        cache data to be pushed later or push immediately.  If true and the
 *        slave is on the secondary bus the MPU will first enger bypass mode
 *        before calling the slaves .config or .get_config funcion
 * @data pointer to the data to confgure or get
 */
struct ext_slave_config {
	int key;
	int len;
	int apply;
	void *data;
};

enum ext_slave_type {
	EXT_SLAVE_TYPE_GYROSCOPE,
	EXT_SLAVE_TYPE_ACCELEROMETER,
	EXT_SLAVE_TYPE_COMPASS,
	EXT_SLAVE_TYPE_PRESSURE,
	/*EXT_SLAVE_TYPE_TEMPERATURE */

	EXT_SLAVE_NUM_TYPES
};

enum ext_slave_id {
	ID_INVALID = 0,

	ACCEL_ID_LIS331,
	ACCEL_ID_LSM303A,
	ACCEL_ID_LIS3DH,
	ACCEL_ID_KXSD9,
	ACCEL_ID_KXTF9,
	ACCEL_ID_BMA150,
	ACCEL_ID_BMA222,
	ACCEL_ID_BMA250,
	ACCEL_ID_ADXL34X,
	ACCEL_ID_MMA8450,
	ACCEL_ID_MMA845X,
	ACCEL_ID_MPU6050,

	COMPASS_ID_AK8975,
	COMPASS_ID_AMI30X,
	COMPASS_ID_AMI306,
	COMPASS_ID_YAS529,
	COMPASS_ID_YAS530,
	COMPASS_ID_HMC5883,
	COMPASS_ID_LSM303M,
	COMPASS_ID_MMC314X,
	COMPASS_ID_HSCDTD002B,
	COMPASS_ID_HSCDTD004A,

	PRESSURE_ID_BMA085,
};

enum ext_slave_endian {
	EXT_SLAVE_BIG_ENDIAN,
	EXT_SLAVE_LITTLE_ENDIAN,
	EXT_SLAVE_FS8_BIG_ENDIAN,
	EXT_SLAVE_FS16_BIG_ENDIAN,
};

enum ext_slave_bus {
	EXT_SLAVE_BUS_INVALID = -1,
	EXT_SLAVE_BUS_PRIMARY = 0,
	EXT_SLAVE_BUS_SECONDARY = 1
};


/**
 *  struct ext_slave_platform_data - Platform data for mpu3050 and mpu6050
 *  slave devices
 *
 *  @get_slave_descr: Function pointer to retrieve the struct ext_slave_descr
 *                    for this slave
 *  @irq: the irq number attached to the slave if any.
 *  @adapt_num: the I2C adapter number.
 *  @bus: the bus the slave is attached to: enum ext_slave_bus
 *  @address: the I2C slave address of the slave device.
 *  @orientation: the mounting matrix of the device relative to MPU.
 *  @irq_data: private data for the slave irq handler
 *  @private_data: additional data, user customizable.  Not touched by the MPU
 *                 driver.
 *
 * The orientation matricies are 3x3 rotation matricies
 * that are applied to the data to rotate from the mounting orientation to the
 * platform orientation.  The values must be one of 0, 1, or -1 and each row and
 * column should have exactly 1 non-zero value.
 */
struct ext_slave_platform_data {
	struct ext_slave_descr *(*get_slave_descr) (void);
	int irq;
	int adapt_num;
	int bus;
	unsigned char address;
	signed char orientation[9];
	void *irq_data;
	void *private_data;
};

struct fix_pnt_range {
	long mantissa;
	long fraction;
};

static inline long range_fixedpoint_to_long_mg(struct fix_pnt_range rng)
{
	return (long)(rng.mantissa * 1000 + rng.fraction / 10);
}

struct ext_slave_read_trigger {
	unsigned char reg;
	unsigned char value;
};

/**
 *  struct ext_slave_descr - Description of the slave device for programming.
 *
 *  @suspend:	function pointer to put the device in suspended state
 *  @resume:	function pointer to put the device in running state
 *  @read:	function that reads the device data
 *  @init:	function used to preallocate memory used by the driver
 *  @exit:	function used to free memory allocated for the driver
 *  @config:	function used to configure the device
 *  @get_config:function used to get the device's configuration
 *
 *  @name:	text name of the device
 *  @type:	device type. enum ext_slave_type
 *  @id:	enum ext_slave_id
 *  @reg:	starting register address to retrieve data.
 *  @len:	length in bytes of the sensor data.  Should be 6.
 *  @endian:	byte order of the data. enum ext_slave_endian
 *  @range:	full scale range of the slave ouput: struct fix_pnt_range
 *  @trigger:	If reading data first requires writing a register this is the
 *		data to write.
 *
 *  Defines the functions and information about the slave the mpu3050 and
 *  mpu6050 needs to use the slave device.
 */
struct ext_slave_descr {
	int (*init) (void *mlsl_handle,
		     struct ext_slave_descr *slave,
		     struct ext_slave_platform_data *pdata);
	int (*exit) (void *mlsl_handle,
		     struct ext_slave_descr *slave,
		     struct ext_slave_platform_data *pdata);
	int (*suspend) (void *mlsl_handle,
			struct ext_slave_descr *slave,
			struct ext_slave_platform_data *pdata);
	int (*resume) (void *mlsl_handle,
		       struct ext_slave_descr *slave,
		       struct ext_slave_platform_data *pdata);
	int (*read) (void *mlsl_handle,
		     struct ext_slave_descr *slave,
		     struct ext_slave_platform_data *pdata,
		     unsigned char *data);
	int (*config) (void *mlsl_handle,
		       struct ext_slave_descr *slave,
		       struct ext_slave_platform_data *pdata,
		       struct ext_slave_config *config);
	int (*get_config) (void *mlsl_handle,
			   struct ext_slave_descr *slave,
			   struct ext_slave_platform_data *pdata,
			   struct ext_slave_config *config);

	char *name;
	unsigned char type;
	unsigned char id;
	unsigned char read_reg;
	unsigned int read_len;
	unsigned char endian;
	struct fix_pnt_range range;
	struct ext_slave_read_trigger *trigger;
};

/**
 * struct mpu_platform_data - Platform data for the mpu driver
 * @int_config:		Bits [7:3] of the int config register.
 * @orientation:	Orientation matrix of the gyroscope
 * @level_shifter:	0: VLogic, 1: VDD
 * @accel:		Accel platform data
 * @compass:		Compass platform data
 * @pressure:		Pressure platform data
 *
 * Contains platform specific information on how to configure the MPU3050 to
 * work on this platform.  The orientation matricies are 3x3 rotation matricies
 * that are applied to the data to rotate from the mounting orientation to the
 * platform orientation.  The values must be one of 0, 1, or -1 and each row and
 * column should have exactly 1 non-zero value.
 */
struct mpu_platform_data {
	unsigned char int_config;
	signed char orientation[GYRO_NUM_AXES * GYRO_NUM_AXES];
	unsigned char level_shifter;
	struct ext_slave_platform_data accel;
	struct ext_slave_platform_data compass;
	struct ext_slave_platform_data pressure;
};

#define MPU_IOCTL (0x81) /* Magic number for MPU Iocts */
/* IOCTL commands for /dev/mpu */
#define MPU_SET_MPU_CONFIG	_IOWR(MPU_IOCTL, 0x00, struct mldl_cfg)
#define MPU_GET_MPU_CONFIG	_IOW(MPU_IOCTL,  0x00, struct mldl_cfg)

#define MPU_SET_PLATFORM_DATA	_IOWR(MPU_IOCTL, 0x01, struct mldl_cfg)

#define MPU_READ		_IOWR(MPU_IOCTL, 0x10, struct mpu_read_write)
#define MPU_WRITE		_IOW(MPU_IOCTL,  0x10, struct mpu_read_write)
#define MPU_READ_MEM		_IOWR(MPU_IOCTL, 0x11, struct mpu_read_write)
#define MPU_WRITE_MEM		_IOW(MPU_IOCTL,  0x11, struct mpu_read_write)
#define MPU_READ_FIFO		_IOWR(MPU_IOCTL, 0x12, struct mpu_read_write)
#define MPU_WRITE_FIFO		_IOW(MPU_IOCTL,  0x12, struct mpu_read_write)

#define MPU_READ_COMPASS	_IOR(MPU_IOCTL, 0x12, unsigned char)
#define MPU_READ_ACCEL		_IOR(MPU_IOCTL, 0x13, unsigned char)
#define MPU_READ_PRESSURE	_IOR(MPU_IOCTL, 0x14, unsigned char)

#define MPU_CONFIG_ACCEL	_IOW(MPU_IOCTL, 0x20, struct ext_slave_config)
#define MPU_CONFIG_COMPASS	_IOW(MPU_IOCTL, 0x21, struct ext_slave_config)
#define MPU_CONFIG_PRESSURE	_IOW(MPU_IOCTL, 0x22, struct ext_slave_config)

#define MPU_GET_CONFIG_ACCEL	_IOWR(MPU_IOCTL, 0x20, struct ext_slave_config)
#define MPU_GET_CONFIG_COMPASS	_IOWR(MPU_IOCTL, 0x21, struct ext_slave_config)
#define MPU_GET_CONFIG_PRESSURE	_IOWR(MPU_IOCTL, 0x22, struct ext_slave_config)

#define MPU_SUSPEND		_IO(MPU_IOCTL, 0x30)
#define MPU_RESUME		_IO(MPU_IOCTL, 0x31)
/* Userspace PM Event response */
#define MPU_PM_EVENT_HANDLED	_IO(MPU_IOCTL, 0x32)


#endif				/* __MPU_H_ */