/*
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* kernel/drivers/input/sensors/accel/lsm330_gyro.c
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*
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* Copyright (C) 2012-2016 Rockchip Co.,Ltd.
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* Author: Bin Yang <yangbin@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 <linux/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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/* Angular rate sensor register */
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#define WHO_AM_I_G 0x0F
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#define CTRL_REG1_G 0x20
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#define CTRL_REG2_G 0x21
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#define CTRL_REG3_G 0x22
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#define CTRL_REG4_G 0x23
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#define CTRL_REG5_G 0x24
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#define REFERENCE_G 0x25
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#define OUT_TEMP_G 0x26
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#define STATUS_REG_G 0x27
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#define OUT_X_L_G 0x28
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#define OUT_X_H_G 0x29
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#define OUT_Y_L_G 0x2A
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#define OUT_Y_H_G 0x2B
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#define OUT_Z_L_G 0x2C
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#define OUT_Z_H_G 0x2D
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#define FIFO_CTRL_REG_G 0x2E
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#define FIFO_SRC_REG_G 0x2F
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#define INT1_CFG_G 0x30
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#define INT1_SRC_G 0x31
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#define INT1_TSH_XH_G 0x32
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#define INT1_TSH_XL_G 0x33
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#define INT1_TSH_YH_G 0x34
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#define INT1_TSH_YL_G 0x35
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#define INT1_TSH_ZH_G 0x36
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#define INT1_TSH_ZL_G 0x37
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#define INT1_DURATION_G 0x38
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#define LSM330_DEVICE_ID_G 0xD4
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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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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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if (enable)
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result = sensor_write_reg(client,
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sensor->ops->ctrl_reg,
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sensor->ops->ctrl_data | 0x0F);
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else
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result = sensor_write_reg(client,
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sensor->ops->ctrl_reg,
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0x00);
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if (result)
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dev_err(&client->dev, "%s:fail to active sensor\n", __func__);
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DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",
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__func__,
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sensor->ops->ctrl_reg,
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sensor->ops->ctrl_data, enable);
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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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dev_err(&client->dev,
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"%s:line=%d,error\n",
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__func__,
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__LINE__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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/*ODR: 760Hz, Cut-off: 100Hz*/
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result = sensor_write_reg(client, CTRL_REG1_G, 0xF0);
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if (result) {
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dev_err(&client->dev,
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"%s:fail to set CTRL_REG1_A.\n",
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__func__);
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return result;
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}
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result = sensor_write_reg(client, CTRL_REG3_G, 0x80);
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if (result) {
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dev_err(&client->dev,
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"%s:fail to set CTRL_REG3_G.\n",
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__func__);
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return result;
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}
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/*Full-scale selection: 2000dps*/
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result = sensor_write_reg(client, CTRL_REG4_G, 0x30);
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if (result) {
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dev_err(&client->dev,
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"%s:fail to set CTRL_REG4_G.\n",
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__func__);
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return result;
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}
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result = sensor_write_reg(client, INT1_CFG_G, 0x7F);
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if (result) {
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dev_err(&client->dev, "%s:fail to set INT1_CFG_G.\n", __func__);
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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 int gyro_report_value(struct i2c_client *client,
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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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input_report_rel(sensor->input_dev, ABS_RX, axis->x);
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input_report_rel(sensor->input_dev, ABS_RY, axis->y);
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input_report_rel(sensor->input_dev, ABS_RZ, 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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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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char buffer[6];
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int ret = 0;
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char value = 0;
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struct sensor_axis axis;
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short x, y, z;
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unsigned char reg_buf = 0;
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unsigned char i = 0;
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if (sensor->ops->read_len < 6) {
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dev_err(&client->dev, "%s:Read len is error,len=%d\n",
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__func__,
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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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reg_buf = sensor->ops->read_reg;
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for (i = 0; i < sensor->ops->read_len; i++) {
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buffer[i] = sensor_read_reg(client, reg_buf);
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reg_buf++;
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}
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x = ((buffer[1] << 8) & 0xFF00) + (buffer[0] & 0xFF);
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y = ((buffer[3] << 8) & 0xFF00) + (buffer[2] & 0xFF);
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z = ((buffer[5] << 8) & 0xFF00) + (buffer[4] & 0xFF);
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axis.x = (pdata->orientation[0]) * x +
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(pdata->orientation[1]) * y +
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(pdata->orientation[2]) * z;
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axis.y = (pdata->orientation[3]) * x +
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(pdata->orientation[4]) * y +
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(pdata->orientation[5]) * z;
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axis.z = (pdata->orientation[6]) * x +
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(pdata->orientation[7]) * y +
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(pdata->orientation[8]) * z;
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gyro_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) {
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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DBG("%s:gyro 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 gyro_lsm330_ops = {
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.name = "lsm330_gyro",
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.type = SENSOR_TYPE_GYROSCOPE,
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.id_i2c = GYRO_ID_LSM330,
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.read_reg = OUT_X_L_G,
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.read_len = 6,
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.id_reg = WHO_AM_I_G,
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.id_data = LSM330_DEVICE_ID_G,
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.precision = 16,
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.ctrl_reg = CTRL_REG1_G,
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.int_status_reg = INT1_SRC_G,
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.range = {-32768, 32768},
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.trig = IRQF_TRIGGER_HIGH | 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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static int gyro_lsm330_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, &gyro_lsm330_ops);
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}
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static int gyro_lsm330_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gyro_lsm330_ops);
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}
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static const struct i2c_device_id gyro_lsm330_id[] = {
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{"lsm330_gyro", GYRO_ID_LSM330},
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{}
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};
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static struct i2c_driver gyro_lsm330_driver = {
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.probe = gyro_lsm330_probe,
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.remove = gyro_lsm330_remove,
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.shutdown = sensor_shutdown,
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.id_table = gyro_lsm330_id,
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.driver = {
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.name = "gyro_lsm330",
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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(gyro_lsm330_driver);
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MODULE_AUTHOR("Bin Yang <yangbin@rock-chips.com>");
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MODULE_DESCRIPTION("lsm330 3-Axis Gyroscope driver");
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MODULE_LICENSE("GPL");
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