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Commit 9dc7e7ab authored by Shaikh Shadul's avatar Shaikh Shadul
Browse files

drivers: input: mpu6050: Add snapshot of MPU6050 6-axis combo driver 



This change adds MPU6050 6-axis combo driver to configure gyroscope
and accelerometer sensors.
This snapshot is taken from commit c89b09ce91ff ("mmc: card: block:
check the user controlled parameters to avoid overflow") with
checkpatch warnings fixed.

Change-Id: I0b8cd9817ef251f034cc94e547787db959f7ec39
Signed-off-by: default avatarShaikh Shadul <sshadu@codeaurora.org>
parent bb499534

drivers/input/misc/Kconfig

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@@ -229,6 +229,16 @@ config INPUT_MPU3050 
	  To compile this driver as a module, choose M here: the

	  module will be called mpu3050.



config SENSORS_MPU6050

	tristate "MPU6050 6-axis gyroscope and acceleromater combo"

	depends on I2C

	help

	  Say Y here if you want to support InvenSense MPU6050

	  connected via an I2C bus.



	  To compile this driver as a module, choose M here: the

	  module will be called mpu6050.



config INPUT_APANEL

	tristate "Fujitsu Lifebook Application Panel buttons"

	depends on X86 && I2C && LEDS_CLASS

drivers/input/misc/Makefile

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@@ -46,6 +46,7 @@ obj-$(CONFIG_INPUT_MAX8997_HAPTIC) += max8997_haptic.o 
obj-$(CONFIG_INPUT_MC13783_PWRBUTTON)	+= mc13783-pwrbutton.o

obj-$(CONFIG_INPUT_MMA8450)		+= mma8450.o

obj-$(CONFIG_INPUT_MPU3050)		+= mpu3050.o

obj-$(CONFIG_SENSORS_MPU6050)		+= mpu6050.o

obj-$(CONFIG_INPUT_PALMAS_PWRBUTTON)	+= palmas-pwrbutton.o

obj-$(CONFIG_INPUT_PCAP)		+= pcap_keys.o

obj-$(CONFIG_INPUT_PCF50633_PMU)	+= pcf50633-input.o

drivers/input/misc/mpu6050.c

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File added.

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drivers/input/misc/mpu6050.h

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/*

 * Copyright (c) 2014, 2017, The Linux Foundation. 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 version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * 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.

 */



/* register and associated bit definition */



#ifndef __MPU6050_H__

#define __MPU6050_H__



#define REG_SAMPLE_RATE_DIV	0x19

#define REG_CONFIG		0x1A



#define REG_GYRO_CONFIG		0x1B

#define BITS_SELF_TEST_EN	0xE0

#define GYRO_CONFIG_FSR_SHIFT	3



#define REG_ACCEL_CONFIG	0x1C

#define REG_ACCEL_MOT_THR	0x1F

#define REG_ACCEL_MOT_DUR	0x20

#define ACCL_CONFIG_FSR_SHIFT	3



#define REG_ACCELMOT_THR	0x1F



#define REG_ACCEL_MOT_DUR	0x20



#define REG_FIFO_EN		0x23

#define FIFO_DISABLE_ALL	0x00

#define BIT_ACCEL_OUT		0x08

#define BITS_GYRO_OUT		0x70



#define REG_INT_PIN_CFG		0x37

#define BIT_INT_ACTIVE_LOW	0x80

#define BIT_INT_OPEN_DRAIN	0x40

#define BIT_INT_LATCH_EN	0x20

#define BIT_INT_RD_CLR		0x10

#define BIT_I2C_BYPASS_EN	0x02

#define BIT_INT_CFG_DEFAULT	(BIT_INT_LATCH_EN | BIT_INT_RD_CLR)



#define REG_INT_ENABLE		0x38

#define BIT_DATA_RDY_EN		0x01

#define BIT_DMP_INT_EN		0x02

#define BIT_FIFO_OVERFLOW	0x10

#define BIT_ZMOT_EN		0x20

#define BIT_MOT_EN		0x40

#define BIT_6500_WOM_EN		0x40



#define REG_DMP_INT_STATUS	0x39



#define REG_INT_STATUS		0x3A

#define BIT_DATA_RDY_INT	0x01

#define BIT_DMP_INT_INT		0x02

#define BIT_FIFO_OVERFLOW	0x10

#define BIT_ZMOT_INT		0x20

#define BIT_MOT_INT		0x40

#define BIT_6500_WOM_INT	0x40



#define REG_RAW_ACCEL		0x3B

#define REG_TEMPERATURE		0x41

#define REG_RAW_GYRO		0x43

#define REG_EXT_SENS_DATA_00	0x49



#define BIT_FIFO_RST		0x04

#define BIT_DMP_RST		0x08

#define BIT_I2C_MST_EN		0x20

#define BIT_FIFO_EN		0x40

#define BIT_DMP_EN		0x80

#define BIT_ACCEL_FIFO		0x08

#define BIT_GYRO_FIFO		0x70



#define REG_DETECT_CTRL		0x69

#define MOT_DET_DELAY_SHIFT	4



#define REG_USER_CTRL		0x6A

#define BIT_FIFO_EN		0x40

#define BIT_FIFO_RESET		0x04



#define REG_PWR_MGMT_1		0x6B

#define BIT_H_RESET		0x80

#define BIT_SLEEP		0x40

#define BIT_CYCLE		0x20

#define BIT_CLK_MASK		0x07

#define BIT_RESET_ALL		0xCF

#define BIT_WAKEUP_AFTER_RESET	0x00



#define REG_PWR_MGMT_2		0x6C

#define BIT_PWR_ACCEL_STBY_MASK	0x38

#define BIT_PWR_GYRO_STBY_MASK	0x07

#define BIT_LPA_FREQ_MASK	0xC0

#define BITS_PWR_ALL_AXIS_STBY	(BIT_PWR_ACCEL_STBY_MASK |\

				BIT_PWR_GYRO_STBY_MASK)



#define REG_FIFO_COUNT_H	0x72

#define REG_FIFO_R_W		0x74

#define REG_WHOAMI		0x75



#define SAMPLE_DIV_MAX		0xFF

#define ODR_DLPF_DIS		8000

#define ODR_DLPF_ENA		1000



/* Min delay = MSEC_PER_SEC/ODR_DLPF_ENA */

/* Max delay = MSEC_PER_SEC/(ODR_DLPF_ENA/SAMPLE_DIV_MAX+1) */

#define DELAY_MS_MIN_DLPF	1

#define DELAY_MS_MAX_DLPF	256



/* Min delay = MSEC_PER_SEC/ODR_DLPF_DIS and round up to 1*/

/* Max delay = MSEC_PER_SEC/(ODR_DLPF_DIS/SAMPLE_DIV_MAX+1) */

#define DELAY_MS_MIN_NODLPF	1

#define DELAY_MS_MAX_NODLPF	32



/* device bootup time in millisecond */

#define POWER_UP_TIME_MS	100

/* delay to wait gyro engine stable in millisecond */

#define SENSOR_UP_TIME_MS	30

/* delay between power operation in millisecond */

#define POWER_EN_DELAY_US	10



#define MPU6050_LPA_5HZ		0x40



/* initial configure */

#define INIT_FIFO_RATE		200



#define DEFAULT_MOT_THR		1

#define DEFAULT_MOT_DET_DUR	1

#define DEFAULT_MOT_DET_DELAY	0



/* chip reset wait */

#define MPU6050_RESET_RETRY_CNT	10

#define MPU6050_RESET_WAIT_MS	20



/* FIFO related constant */

#define MPU6050_FIFO_SIZE_BYTE	1024

#define MPU6050_FIFO_CNT_SIZE	2



enum mpu_device_id {

	MPU6050_ID = 0x68,

	MPU6500_ID = 0x70,

};



enum mpu_fsr {

	MPU_FSR_250DPS = 0,

	MPU_FSR_500DPS,

	MPU_FSR_1000DPS,

	MPU_FSR_2000DPS,

	NUM_FSR

};



enum mpu_filter {

	MPU_DLPF_256HZ_NOLPF2 = 0,

	MPU_DLPF_188HZ,

	MPU_DLPF_98HZ,

	MPU_DLPF_42HZ,

	MPU_DLPF_20HZ,

	MPU_DLPF_10HZ,

	MPU_DLPF_5HZ,

	MPU_DLPF_RESERVED,

	NUM_FILTER

};



enum mpu_clock_source {

	MPU_CLK_INTERNAL = 0,

	MPU_CLK_PLL_X,

	NUM_CLK

};



enum mpu_accl_fs {

	ACCEL_FS_02G = 0,

	ACCEL_FS_04G,

	ACCEL_FS_08G,

	ACCEL_FS_16G,

	NUM_ACCL_FSR

};



/* Sensitivity Scale Factor

 * Sensor HAL will take 1024 LSB/g

 */

enum mpu_accel_fs_shift {

	ACCEL_SCALE_SHIFT_02G = 0,

	ACCEL_SCALE_SHIFT_04G = 1,

	ACCEL_SCALE_SHIFT_08G = 2,

	ACCEL_SCALE_SHIFT_16G = 3

};



enum mpu_gyro_fs_shift {

	GYRO_SCALE_SHIFT_FS0 = 3,

	GYRO_SCALE_SHIFT_FS1 = 2,

	GYRO_SCALE_SHIFT_FS2 = 1,

	GYRO_SCALE_SHIFT_FS3 = 0

};



/* device enum */

enum inv_devices {

	INV_MPU6050,

	INV_MPU6500,

	INV_MPU6XXX,

	INV_NUM_PARTS

};



/*

 *  struct mpu_reg_map_s - Notable slave registers.

 *  @sample_rate_div:	Divider applied to gyro output rate.

 *  @lpf:		Configures internal LPF.

 *  @fifo_en:	Determines which data will appear in FIFO.

 *  @gyro_config:	gyro config register.

 *  @accel_config:	accel config register

 *  @mot_thr:	Motion detection threshold.

 *  @fifo_count_h:	Upper byte of FIFO count.

 *  @fifo_r_w:	FIFO register.

 *  @raw_gyro:	Address of first gyro register.

 *  @raw_accl:	Address of first accel register.

 *  @temperature:	temperature register.

 *  @int_pin_cfg:	Interrupt pin and I2C bypass configuration.

 *  @int_enable:	Interrupt enable register.

 *  @int_status:	Interrupt flags.

 *  @user_ctrl:	User control.

 *  @pwr_mgmt_1:	Controls chip's power state and clock source.

 *  @pwr_mgmt_2:	Controls power state of individual sensors.

 */

struct mpu_reg_map {

	u8 sample_rate_div;

	u8 lpf;

	u8 fifo_en;

	u8 gyro_config;

	u8 accel_config;

	u8 fifo_count_h;

	u8 mot_thr;

	u8 mot_dur;

	u8 fifo_r_w;

	u8 raw_gyro;

	u8 raw_accel;

	u8 temperature;

	u8 int_pin_cfg;

	u8 int_enable;

	u8 int_status;

	u8 user_ctrl;

	u8 pwr_mgmt_1;

	u8 pwr_mgmt_2;

};



/*

 *  struct mpu_chip_config - Cached chip configuration data.

 *  @fsr:		Full scale range.

 *  @lpf:		Digital low pass filter frequency.

 *  @accl_fs:		accel full scale range.

 *  @enable:		master enable to enable output

 *  @accel_enable:		enable accel functionality

 *  @accel_fifo_enable:	enable accel data output

 *  @gyro_enable:		enable gyro functionality

 *  @gyro_fifo_enable:	enable gyro data output

 *  @is_asleep:		1 if chip is powered down.

 *  @lpa_mode:		low power mode.

 *  @tap_on:		tap on/off.

 *  @flick_int_on:		flick interrupt on/off.

 *  @int_enabled:		interrupt is enabled.

 *  @mot_det_on:		motion detection wakeup enabled.

 *  @cfg_fifo_en:		FIFO R/W is enabled in USER_CTRL register.

 *  @int_pin_cfg:		interrupt pin configuration.

 *  @lpa_freq:		frequency of low power accelerometer.

 *  @rate_div:		Sampling rate divider.

 */

struct mpu_chip_config {

	u32 fsr:2;

	u32 lpf:3;

	u32 accel_fs:2;

	u32 enable:1;

	u32 accel_enable:1;

	u32 accel_fifo_enable:1;

	u32 gyro_enable:1;

	u32 gyro_fifo_enable:1;

	u32 is_asleep:1;

	u32 lpa_mode:1;

	u32 tap_on:1;

	u32 flick_int_on:1;

	u32 int_enabled:1;

	u32 mot_det_on:1;

	u32 cfg_fifo_en:1;

	u8 int_pin_cfg;

	u16 lpa_freq;

	u16 rate_div;

};



/*

 *  struct mpu6050_platform_data - device platform dependent data.

 *  @gpio_en:		enable GPIO.

 *  @gpio_int:		interrupt GPIO.

 *  @int_flags:		interrupt pin control flags.

 *  @use_int:		use interrupt mode instead of polling data.

 *  @place:			sensor place number.

 */

struct mpu6050_platform_data {

	int gpio_en;

	int gpio_int;

	u32 int_flags;

	bool use_int;

	u8 place;

};



#endif /* __MPU6050_H__ */