259 lines
7.0 KiB
C
259 lines
7.0 KiB
C
/* drivers/input/sensors/access/mma7660.c
|
|
*
|
|
* Copyright (C) 2012-2015 ROCKCHIP.
|
|
* Author: luowei <lw@rock-chips.com>
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
#include <linux/interrupt.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/atomic.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/input.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/freezer.h>
|
|
#include <linux/of_gpio.h>
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
#include <linux/earlysuspend.h>
|
|
#endif
|
|
#include <linux/sensor-dev.h>
|
|
|
|
#define MMA7660_ENABLE 1
|
|
#define MMA7660_REG_X_OUT 0x0
|
|
#define MMA7660_REG_Y_OUT 0x1
|
|
#define MMA7660_REG_Z_OUT 0x2
|
|
#define MMA7660_REG_TILT 0x3
|
|
#define MMA7660_REG_SRST 0x4
|
|
#define MMA7660_REG_SPCNT 0x5
|
|
#define MMA7660_REG_INTSU 0x6
|
|
#define MMA7660_REG_MODE 0x7
|
|
#define MMA7660_REG_SR 0x8
|
|
#define MMA7660_REG_PDET 0x9
|
|
#define MMA7660_REG_PD 0xa
|
|
#define MMA7660_PRECISION 6
|
|
|
|
/****************operate according to sensor chip:start************/
|
|
|
|
static int sensor_active(struct i2c_client *client, int enable, int rate)
|
|
{
|
|
struct sensor_private_data *sensor =
|
|
(struct sensor_private_data *)i2c_get_clientdata(client);
|
|
int result = 0;
|
|
int status = 0;
|
|
|
|
sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
|
|
|
|
if (enable) {
|
|
status = MMA7660_ENABLE;
|
|
sensor->ops->ctrl_data |= status;
|
|
} else {
|
|
status = ~MMA7660_ENABLE;
|
|
sensor->ops->ctrl_data &= status;
|
|
}
|
|
|
|
result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
|
|
if (result)
|
|
dev_err(&client->dev, "%s:fail to active sensor\n", __func__);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int sensor_init(struct i2c_client *client)
|
|
{
|
|
struct sensor_private_data *sensor =
|
|
(struct sensor_private_data *)i2c_get_clientdata(client);
|
|
int result = 0;
|
|
|
|
result = sensor->ops->active(client, 0, 0);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:line=%d,error\n", __func__, __LINE__);
|
|
return result;
|
|
}
|
|
|
|
sensor->status_cur = SENSOR_OFF;
|
|
|
|
/*120 Samples/Second Active and Auto-Sleep Mode */
|
|
result = sensor_write_reg(client, MMA7660_REG_SR, 0x01 << 5);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:line=%d,error\n", __func__, __LINE__);
|
|
return result;
|
|
}
|
|
|
|
if (sensor->pdata->irq_enable) {
|
|
result = sensor_write_reg(client, MMA7660_REG_INTSU, 1 << 4);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:line=%d,error\n", __func__, __LINE__);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
sensor->ops->ctrl_data = 1 << 6;
|
|
result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:line=%d,error\n", __func__, __LINE__);
|
|
return result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
|
|
{
|
|
int result = (int)low_byte;
|
|
|
|
if (low_byte & 0x20)
|
|
result = ((~result & 0x1f) + 1) * (-768);
|
|
else
|
|
result = (result & 0x1f) * 768;
|
|
|
|
return result;
|
|
}
|
|
|
|
static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
|
|
{
|
|
struct sensor_private_data *sensor =
|
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
|
|
|
if (sensor->status_cur == SENSOR_ON) {
|
|
/* Report acceleration sensor information */
|
|
input_report_abs(sensor->input_dev, ABS_X, axis->x);
|
|
input_report_abs(sensor->input_dev, ABS_Y, axis->y);
|
|
input_report_abs(sensor->input_dev, ABS_Z, axis->z);
|
|
input_sync(sensor->input_dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sensor_report_value(struct i2c_client *client)
|
|
{
|
|
struct sensor_private_data *sensor =
|
|
(struct sensor_private_data *)i2c_get_clientdata(client);
|
|
struct sensor_platform_data *pdata = sensor->pdata;
|
|
int ret = 0;
|
|
int x, y, z;
|
|
struct sensor_axis axis;
|
|
char buffer[3] = {0};
|
|
char value = 0;
|
|
static int flag;
|
|
|
|
if (sensor->ops->read_len < 3) {
|
|
dev_err(&client->dev, "%s:lenth is error,len=%d\n", __func__, sensor->ops->read_len);
|
|
return -1;
|
|
}
|
|
|
|
memset(buffer, 0, 3);
|
|
|
|
/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
|
|
do {
|
|
*buffer = sensor->ops->read_reg;
|
|
ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
|
|
if (ret < 0)
|
|
return ret;
|
|
} while (0);
|
|
|
|
x = sensor_convert_data(sensor->client, 0, buffer[0]);
|
|
y = sensor_convert_data(sensor->client, 0, buffer[1]);
|
|
z = sensor_convert_data(sensor->client, 0, buffer[2]);
|
|
|
|
axis.x = (pdata->orientation[0]) * x + (pdata->orientation[1]) * y + (pdata->orientation[2]) * z;
|
|
axis.y = (pdata->orientation[3]) * x + (pdata->orientation[4]) * y + (pdata->orientation[5]) * z;
|
|
axis.z = (pdata->orientation[6]) * x + (pdata->orientation[7]) * y + (pdata->orientation[8]) * z;
|
|
|
|
/*
|
|
*input dev will ignore report data if data value is the same with last_value,
|
|
*sample rate will not enough by this way, so just avoid this case
|
|
*/
|
|
if ((sensor->axis.x == axis.x) && (sensor->axis.y == axis.y) && (sensor->axis.z == axis.z)) {
|
|
if (flag) {
|
|
flag = 0;
|
|
axis.x += 1;
|
|
axis.y += 1;
|
|
axis.z += 1;
|
|
} else {
|
|
flag = 1;
|
|
axis.x -= 1;
|
|
axis.y -= 1;
|
|
axis.z -= 1;
|
|
}
|
|
}
|
|
|
|
gsensor_report_value(client, &axis);
|
|
|
|
mutex_lock(&sensor->data_mutex);
|
|
sensor->axis = axis;
|
|
mutex_unlock(&sensor->data_mutex);
|
|
|
|
if (sensor->pdata->irq_enable && sensor->ops->int_status_reg >= 0)
|
|
value = sensor_read_reg(client, sensor->ops->int_status_reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct sensor_operate gsensor_mma7660_ops = {
|
|
.name = "mma7660",
|
|
.type = SENSOR_TYPE_ACCEL,
|
|
.id_i2c = ACCEL_ID_MMA7660,
|
|
.read_reg = MMA7660_REG_X_OUT,
|
|
.read_len = 3,
|
|
.id_reg = SENSOR_UNKNOW_DATA,
|
|
.id_data = SENSOR_UNKNOW_DATA,
|
|
.precision = MMA7660_PRECISION,
|
|
.ctrl_reg = MMA7660_REG_MODE,
|
|
.int_status_reg = SENSOR_UNKNOW_DATA,
|
|
.range = {-24576, 24576},
|
|
.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
.active = sensor_active,
|
|
.init = sensor_init,
|
|
.report = sensor_report_value,
|
|
};
|
|
|
|
/****************operate according to sensor chip:end************/
|
|
static int gsensor_mma7660_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *devid)
|
|
{
|
|
return sensor_register_device(client, NULL, devid, &gsensor_mma7660_ops);
|
|
}
|
|
|
|
static int gsensor_mma7660_remove(struct i2c_client *client)
|
|
{
|
|
return sensor_unregister_device(client, NULL, &gsensor_mma7660_ops);
|
|
}
|
|
|
|
static const struct i2c_device_id gsensor_mma7660_id[] = {
|
|
{"gs_mma7660", ACCEL_ID_MMA7660},
|
|
{}
|
|
};
|
|
|
|
static struct i2c_driver gsensor_mma7660_driver = {
|
|
.probe = gsensor_mma7660_probe,
|
|
.remove = gsensor_mma7660_remove,
|
|
.shutdown = sensor_shutdown,
|
|
.id_table = gsensor_mma7660_id,
|
|
.driver = {
|
|
.name = "gsensor_mma7660",
|
|
#ifdef CONFIG_PM
|
|
.pm = &sensor_pm_ops,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
module_i2c_driver(gsensor_mma7660_driver);
|
|
|
|
MODULE_AUTHOR("luowei <lw@rock-chips.com>");
|
|
MODULE_DESCRIPTION("mma7660 3-Axis accelerometer driver");
|
|
MODULE_LICENSE("GPL");
|