/* drivers/input/sensors/access/kxtj9.c
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*
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* Copyright (C) 2012-2015 ROCKCHIP.
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* Author: luowei <lw@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/miscdevice.h>
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#include <linux/gpio.h>
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#include <linux/uaccess.h>
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#include <asm/atomic.h>
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/workqueue.h>
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#include <linux/freezer.h>
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#include <linux/of_gpio.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/sensor-dev.h>
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#define KXTJ9_DEVID 0x09 //chip id
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#define KXTJ9_RANGE (2 * 16384)
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#define KXTJ9_XOUT_HPF_L (0x00) /* 0000 0000 */
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#define KXTJ9_XOUT_HPF_H (0x01) /* 0000 0001 */
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#define KXTJ9_YOUT_HPF_L (0x02) /* 0000 0010 */
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#define KXTJ9_YOUT_HPF_H (0x03) /* 0000 0011 */
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#define KXTJ9_ZOUT_HPF_L (0x04) /* 0001 0100 */
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#define KXTJ9_ZOUT_HPF_H (0x05) /* 0001 0101 */
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#define KXTJ9_XOUT_L (0x06) /* 0000 0110 */
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#define KXTJ9_XOUT_H (0x07) /* 0000 0111 */
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#define KXTJ9_YOUT_L (0x08) /* 0000 1000 */
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#define KXTJ9_YOUT_H (0x09) /* 0000 1001 */
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#define KXTJ9_ZOUT_L (0x0A) /* 0001 1010 */
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#define KXTJ9_ZOUT_H (0x0B) /* 0001 1011 */
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#define KXTJ9_ST_RESP (0x0C) /* 0000 1100 */
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#define KXTJ9_WHO_AM_I (0x0F) /* 0000 1111 */
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#define KXTJ9_TILT_POS_CUR (0x10) /* 0001 0000 */
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#define KXTJ9_TILT_POS_PRE (0x11) /* 0001 0001 */
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#define KXTJ9_INT_SRC_REG1 (0x15) /* 0001 0101 */
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#define KXTJ9_INT_SRC_REG2 (0x16) /* 0001 0110 */
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#define KXTJ9_STATUS_REG (0x18) /* 0001 1000 */
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#define KXTJ9_INT_REL (0x1A) /* 0001 1010 */
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#define KXTJ9_CTRL_REG1 (0x1B) /* 0001 1011 */
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#define KXTJ9_CTRL_REG2 (0x1C) /* 0001 1100 */
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#define KXTJ9_CTRL_REG3 (0x1D) /* 0001 1101 */
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#define KXTJ9_INT_CTRL_REG1 (0x1E) /* 0001 1110 */
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#define KXTJ9_INT_CTRL_REG2 (0x1F) /* 0001 1111 */
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#define KXTJ9_INT_CTRL_REG3 (0x20) /* 0010 0000 */
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#define KXTJ9_DATA_CTRL_REG (0x21) /* 0010 0001 */
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#define KXTJ9_TILT_TIMER (0x28) /* 0010 1000 */
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#define KXTJ9_WUF_TIMER (0x29) /* 0010 1001 */
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#define KXTJ9_TDT_TIMER (0x2B) /* 0010 1011 */
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#define KXTJ9_TDT_H_THRESH (0x2C) /* 0010 1100 */
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#define KXTJ9_TDT_L_THRESH (0x2D) /* 0010 1101 */
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#define KXTJ9_TDT_TAP_TIMER (0x2E) /* 0010 1110 */
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#define KXTJ9_TDT_TOTAL_TIMER (0x2F) /* 0010 1111 */
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#define KXTJ9_TDT_LATENCY_TIMER (0x30) /* 0011 0000 */
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#define KXTJ9_TDT_WINDOW_TIMER (0x31) /* 0011 0001 */
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#define KXTJ9_WUF_THRESH (0x5A) /* 0101 1010 */
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#define KXTJ9_TILT_ANGLE (0x5C) /* 0101 1100 */
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#define KXTJ9_HYST_SET (0x5F) /* 0101 1111 */
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/* CONTROL REGISTER 1 BITS */
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#define KXTJ9_DISABLE 0x7F
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#define KXTJ9_ENABLE (1 << 7)
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/* INPUT_ABS CONSTANTS */
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#define FUZZ 3
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#define FLAT 3
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/* RESUME STATE INDICES */
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#define RES_DATA_CTRL 0
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#define RES_CTRL_REG1 1
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#define RES_INT_CTRL1 2
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#define RESUME_ENTRIES 3
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/* CTRL_REG1: set resolution, g-range, data ready enable */
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/* Output resolution: 8-bit valid or 12-bit valid */
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#define KXTJ9_RES_8BIT 0
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#define KXTJ9_RES_12BIT (1 << 6)
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/* Output g-range: +/-2g, 4g, or 8g */
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#define KXTJ9_G_2G 0
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#define KXTJ9_G_4G (1 << 3)
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#define KXTJ9_G_8G (1 << 4)
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/* DATA_CTRL_REG: controls the output data rate of the part */
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#define KXTJ9_ODR12_5F 0
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#define KXTJ9_ODR25F 1
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#define KXTJ9_ODR50F 2
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#define KXTJ9_ODR100F 3
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#define KXTJ9_ODR200F 4
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#define KXTJ9_ODR400F 5
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#define KXTJ9_ODR800F 6
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/* kxtj9 */
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#define KXTJ9_PRECISION 12
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#define KXTJ9_BOUNDARY (0x1 << (KXTJ9_PRECISION - 1))
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#define KXTJ9_GRAVITY_STEP KXTJ9_RANGE / KXTJ9_BOUNDARY
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/****************operate according to sensor chip:start************/
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static int sensor_active(struct i2c_client *client, int enable, int rate)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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int status = 0;
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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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//register setting according to chip datasheet
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if(enable)
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{
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status = KXTJ9_ENABLE; //kxtj9
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sensor->ops->ctrl_data |= status;
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}
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else
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{
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status = ~KXTJ9_ENABLE; //kxtj9
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sensor->ops->ctrl_data &= status;
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}
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DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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printk("%s:fail to active sensor\n",__func__);
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return result;
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}
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static int sensor_init(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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result = sensor->ops->active(client,0,0);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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result = sensor_write_reg(client, KXTJ9_DATA_CTRL_REG, KXTJ9_ODR400F);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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if(sensor->pdata->irq_enable) //open interrupt
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{
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result = sensor_write_reg(client, KXTJ9_INT_CTRL_REG1, 0x34);//enable int,active high,need read INT_REL
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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}
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sensor->ops->ctrl_data = (KXTJ9_RES_12BIT | KXTJ9_G_2G);
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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return result;
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}
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static short sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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{
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short result;
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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//int precision = sensor->ops->precision;
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switch (sensor->devid) {
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case KXTJ9_DEVID:
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result = (((short)high_byte << 8) | ((short)low_byte)) >> 4;
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result *= KXTJ9_GRAVITY_STEP;
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break;
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default:
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printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
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return -EFAULT;
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}
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return result;
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}
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static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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if (sensor->status_cur == SENSOR_ON) {
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/* Report acceleration sensor information */
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input_report_abs(sensor->input_dev, ABS_X, axis->x);
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input_report_abs(sensor->input_dev, ABS_Y, axis->y);
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input_report_abs(sensor->input_dev, ABS_Z, axis->z);
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input_sync(sensor->input_dev);
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}
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return 0;
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}
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#define GSENSOR_MIN 10
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static int sensor_report_value(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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struct sensor_platform_data *pdata = sensor->pdata;
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int ret = 0;
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short x, y, z;
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struct sensor_axis axis;
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char buffer[6] = {0};
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char value = 0;
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if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
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{
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printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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return -1;
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}
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memset(buffer, 0, 6);
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/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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do {
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*buffer = sensor->ops->read_reg;
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ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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if (ret < 0)
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return ret;
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} while (0);
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//this gsensor need 6 bytes buffer
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x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
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y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
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z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
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axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
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axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
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DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
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gsensor_report_value(client, &axis);
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mutex_lock(&sensor->data_mutex);
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sensor->axis = axis;
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mutex_unlock(&sensor->data_mutex);
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if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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{
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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DBG("%s:sensor int status :0x%x\n",__func__,value);
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}
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return ret;
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}
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static struct sensor_operate gsensor_kxtj9_ops = {
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.name = "kxtj9",
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.type = SENSOR_TYPE_ACCEL,
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.id_i2c = ACCEL_ID_KXTJ9,
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.read_reg = KXTJ9_XOUT_L,
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.read_len = 6,
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.id_reg = KXTJ9_WHO_AM_I,
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.id_data = KXTJ9_DEVID,
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.precision = KXTJ9_PRECISION,
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.ctrl_reg = KXTJ9_CTRL_REG1,
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.int_status_reg = KXTJ9_INT_REL,
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.range = {-32768, 32768},
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.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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.active = sensor_active,
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.init = sensor_init,
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.report = sensor_report_value,
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};
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/****************operate according to sensor chip:end************/
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static int gsensor_kxtj9_probe(struct i2c_client *client,
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const struct i2c_device_id *devid)
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{
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return sensor_register_device(client, NULL, devid, &gsensor_kxtj9_ops);
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}
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static int gsensor_kxtj9_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gsensor_kxtj9_ops);
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}
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static const struct i2c_device_id gsensor_kxtj9_id[] = {
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{"gs_kxtj9", ACCEL_ID_KXTJ9},
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{}
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};
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static struct i2c_driver gsensor_kxtj9_driver = {
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.probe = gsensor_kxtj9_probe,
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.remove = gsensor_kxtj9_remove,
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.shutdown = sensor_shutdown,
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.id_table = gsensor_kxtj9_id,
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.driver = {
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.name = "gsensor_kxtj9",
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#ifdef CONFIG_PM
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.pm = &sensor_pm_ops,
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#endif
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},
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};
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module_i2c_driver(gsensor_kxtj9_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("kxtj9 3-Axis accelerometer driver");
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MODULE_LICENSE("GPL");
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