/* drivers/input/sensors/access/mma8452.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>
/* Default register settings */
#define RBUFF_SIZE 12 /* Rx buffer size */
#define MMA8452_REG_STATUS 0x0 //RO
#define MMA8452_REG_X_OUT_MSB 0x1 //RO
#define MMA8452_REG_X_OUT_LSB 0x2 //RO
#define MMA8452_REG_Y_OUT_MSB 0x3 //RO
#define MMA8452_REG_Y_OUT_LSB 0x4 //RO
#define MMA8452_REG_Z_OUT_MSB 0x5 //RO
#define MMA8452_REG_Z_OUT_LSB 0x6 //RO
#define MMA8452_REG_F_SETUP 0x9 //RW
#define MMA8452_REG_SYSMOD 0xB //RO
#define MMA8452_REG_INTSRC 0xC //RO
#define MMA8452_REG_WHO_AM_I 0xD //RO
#define MMA8452_REG_XYZ_DATA_CFG 0xE //RW
#define MMA8452_REG_HP_FILTER_CUTOFF 0xF //RW
#define MMA8452_REG_PL_STATUS 0x10 //RO
#define MMA8452_REG_PL_CFG 0x11 //RW
#define MMA8452_REG_PL_COUNT 0x12 //RW
#define MMA8452_REG_PL_BF_ZCOMP 0x13 //RW
#define MMA8452_REG_P_L_THS_REG 0x14 //RW
#define MMA8452_REG_FF_MT_CFG 0x15 //RW
#define MMA8452_REG_FF_MT_SRC 0x16 //RO
#define MMA8452_REG_FF_MT_THS 0x17 //RW
#define MMA8452_REG_FF_MT_COUNT 0x18 //RW
#define MMA8452_REG_TRANSIENT_CFG 0x1D //RW
#define MMA8452_REG_TRANSIENT_SRC 0x1E //RO
#define MMA8452_REG_TRANSIENT_THS 0x1F //RW
#define MMA8452_REG_TRANSIENT_COUNT 0x20 //RW
#define MMA8452_REG_PULSE_CFG 0x21 //RW
#define MMA8452_REG_PULSE_SRC 0x22 //RO
#define MMA8452_REG_PULSE_THSX 0x23 //RW
#define MMA8452_REG_PULSE_THSY 0x24 //RW
#define MMA8452_REG_PULSE_THSZ 0x25 //RW
#define MMA8452_REG_PULSE_TMLT 0x26 //RW
#define MMA8452_REG_PULSE_LTCY 0x27 //RW
#define MMA8452_REG_PULSE_WIND 0x28 //RW
#define MMA8452_REG_ASLP_COUNT 0x29 //RW
#define MMA8452_REG_CTRL_REG1 0x2A //RW
#define MMA8452_REG_CTRL_REG2 0x2B //RW
#define MMA8452_REG_CTRL_REG3 0x2C //RW
#define MMA8452_REG_CTRL_REG4 0x2D //RW
#define MMA8452_REG_CTRL_REG5 0x2E //RW
#define MMA8452_REG_OFF_X 0x2F //RW
#define MMA8452_REG_OFF_Y 0x30 //RW
#define MMA8452_REG_OFF_Z 0x31 //RW
/*rate*/
#define MMA8452_RATE_800 0
#define MMA8452_RATE_400 1
#define MMA8452_RATE_200 2
#define MMA8452_RATE_100 3
#define MMA8452_RATE_50 4
#define MMA8452_RATE_12P5 5
#define MMA8452_RATE_6P25 6
#define MMA8452_RATE_1P56 7
#define MMA8452_RATE_SHIFT 3
#define MMA8452_ASLP_RATE_50 0
#define MMA8452_ASLP_RATE_12P5 1
#define MMA8452_ASLP_RATE_6P25 2
#define MMA8452_ASLP_RATE_1P56 3
#define MMA8452_ASLP_RATE_SHIFT 6
/*Auto-adapt mma845x series*/
/*Modified by Yick @ROCKCHIP
xieyi@rockchips.com*/
/*
Range: unit(ug 1g=1 000 000 ug)
option(2g,4g,8g)
G would be defined on android HAL
Precision: bit wide of valid data
Boundary: Max positive count
Gravity_step: gravity value indicated by per count
*/
#define FREAD_MASK 0 /* enabled(1<<1) only if reading MSB 8bits*/
#define MMA845X_RANGE (16384 * 2)
/* mma8451 */
#define MMA8451_PRECISION 14
#define MMA8451_BOUNDARY (0x1 << (MMA8451_PRECISION - 1))
#define MMA8451_GRAVITY_STEP (MMA845X_RANGE / MMA8451_BOUNDARY)
/* mma8452 */
#define MMA8452_PRECISION 12
#define MMA8452_BOUNDARY (0x1 << (MMA8452_PRECISION - 1))
#define MMA8452_GRAVITY_STEP (MMA845X_RANGE / MMA8452_BOUNDARY)
/* mma8453 */
#define MMA8453_PRECISION 10
#define MMA8453_BOUNDARY (0x1 << (MMA8453_PRECISION - 1))
#define MMA8453_GRAVITY_STEP (MMA845X_RANGE / MMA8453_BOUNDARY)
/* mma8653 */
#define MMA8653_PRECISION 10
#define MMA8653_BOUNDARY (0x1 << (MMA8653_PRECISION - 1))
#define MMA8653_GRAVITY_STEP (MMA845X_RANGE / MMA8653_BOUNDARY)
#define MMA8451_DEVID 0x1a
#define MMA8452_DEVID 0x2a
#define MMA8453_DEVID 0x3a
#define MMA8653_DEVID 0x5a
#define MMA8452_ENABLE 1
/****************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);
//register setting according to chip datasheet
if(enable)
{
status = MMA8452_ENABLE; //mma8452
sensor->ops->ctrl_data |= status;
}
else
{
status = ~MMA8452_ENABLE; //mma8452
sensor->ops->ctrl_data &= status;
}
DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
if(result)
printk("%s:fail to active sensor\n",__func__);
return result;
}
static int sensor_init(struct i2c_client *client)
{
int tmp;
int ret = 0;
int i = 0;
unsigned char id_reg = MMA8452_REG_WHO_AM_I;
unsigned char id_data = 0;
struct sensor_private_data *sensor =
(struct sensor_private_data *) i2c_get_clientdata(client);
ret = sensor->ops->active(client,0,0);
if(ret)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return ret;
}
sensor->status_cur = SENSOR_OFF;
for(i=0; i<3; i++)
{
ret = sensor_rx_data(client, &id_reg, 1);
id_data = id_reg;
if(!ret)
break;
}
if(ret)
{
printk("%s:fail to read id,ret=%d\n",__func__, ret);
return ret;
}
sensor->devid = id_data;
/* disable FIFO FMODE = 0*/
ret = sensor_write_reg(client,MMA8452_REG_F_SETUP,0);
DBG("%s: MMA8452_REG_F_SETUP:%x\n",__func__, sensor_read_reg(client,MMA8452_REG_F_SETUP));
/* set full scale range to 2g */
ret = sensor_write_reg(client,MMA8452_REG_XYZ_DATA_CFG,0);
DBG("%s: MMA8452_REG_XYZ_DATA_CFG:%x\n",__func__, sensor_read_reg(client,MMA8452_REG_XYZ_DATA_CFG));
/* set bus 8bit/14bit(FREAD = 1,FMODE = 0) ,data rate*/
tmp = (MMA8452_RATE_12P5<< MMA8452_RATE_SHIFT) | FREAD_MASK;
ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG1,tmp);
sensor->ops->ctrl_data = tmp;
DBG("mma8452 MMA8452_REG_CTRL_REG1:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG1));
DBG("mma8452 MMA8452_REG_SYSMOD:%x\n",sensor_read_reg(client,MMA8452_REG_SYSMOD));
ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG3,5);
DBG("mma8452 MMA8452_REG_CTRL_REG3:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG3));
ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG4,1);
DBG("mma8452 MMA8452_REG_CTRL_REG4:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG4));
ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG5,1);
DBG("mma8452 MMA8452_REG_CTRL_REG5:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG5));
DBG("mma8452 MMA8452_REG_SYSMOD:%x\n",sensor_read_reg(client,MMA8452_REG_SYSMOD));
return ret;
}
static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
{
s64 result;
struct sensor_private_data *sensor =
(struct sensor_private_data *) i2c_get_clientdata(client);
//int precision = sensor->ops->precision;
switch (sensor->devid) {
case MMA8451_DEVID:
swap(high_byte,low_byte);
result = ((int)high_byte << (MMA8451_PRECISION-8))
| ((int)low_byte >> (16-MMA8451_PRECISION));
if (result < MMA8451_BOUNDARY)
result = result * MMA8451_GRAVITY_STEP;
else
result = ~(((~result & (0x7fff >> (16 - MMA8451_PRECISION))) + 1)
* MMA8451_GRAVITY_STEP) + 1;
break;
case MMA8452_DEVID:
swap(high_byte,low_byte);
result = ((int)high_byte << (MMA8452_PRECISION-8))
| ((int)low_byte >> (16-MMA8452_PRECISION));
if (result < MMA8452_BOUNDARY)
result = result * MMA8452_GRAVITY_STEP;
else
result = ~(((~result & (0x7fff >> (16 - MMA8452_PRECISION))) + 1)
* MMA8452_GRAVITY_STEP) + 1;
break;
case MMA8453_DEVID:
swap(high_byte,low_byte);
result = ((int)high_byte << (MMA8453_PRECISION-8))
| ((int)low_byte >> (16-MMA8453_PRECISION));
if (result < MMA8453_BOUNDARY)
result = result * MMA8453_GRAVITY_STEP;
else
result = ~(((~result & (0x7fff >> (16 - MMA8453_PRECISION))) + 1)
* MMA8453_GRAVITY_STEP) + 1;
break;
case MMA8653_DEVID:
swap(high_byte,low_byte);
result = ((int)high_byte << (MMA8653_PRECISION-8))
| ((int)low_byte >> (16-MMA8653_PRECISION));
if (result < MMA8653_BOUNDARY)
result = result * MMA8653_GRAVITY_STEP;
else
result = ~(((~result & (0x7fff >> (16 - MMA8653_PRECISION))) + 1)
* MMA8653_GRAVITY_STEP) + 1;
break;
default:
printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
return -EFAULT;
}
return (int)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;
}
#define GSENSOR_MIN 10
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[6] = {0};
char value = 0;
if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
{
printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
return -1;
}
memset(buffer, 0, 6);
/* 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);
//this gsensor need 6 bytes buffer
x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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;
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)) //read sensor intterupt status register
{
value = sensor_read_reg(client, sensor->ops->int_status_reg);
DBG("%s:sensor int status :0x%x\n",__func__,value);
}
return ret;
}
static struct sensor_operate gsensor_mma8452_ops = {
.name = "mma8452",
.type = SENSOR_TYPE_ACCEL,
.id_i2c = ACCEL_ID_MMA845X,
.read_reg = MMA8452_REG_X_OUT_MSB,
.read_len = 6,
.id_reg = SENSOR_UNKNOW_DATA,
.id_data = SENSOR_UNKNOW_DATA,
.precision = MMA8452_PRECISION,
.ctrl_reg = MMA8452_REG_CTRL_REG1,
.int_status_reg = MMA8452_REG_INTSRC,
.range = {-MMA845X_RANGE, MMA845X_RANGE},
.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_mma8452_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
return sensor_register_device(client, NULL, devid, &gsensor_mma8452_ops);
}
static int gsensor_mma8452_remove(struct i2c_client *client)
{
return sensor_unregister_device(client, NULL, &gsensor_mma8452_ops);
}
static const struct i2c_device_id gsensor_mma8452_id[] = {
{"gs_mma8452", ACCEL_ID_MMA845X},
{}
};
static struct i2c_driver gsensor_mma8452_driver = {
.probe = gsensor_mma8452_probe,
.remove = gsensor_mma8452_remove,
.shutdown = sensor_shutdown,
.id_table = gsensor_mma8452_id,
.driver = {
.name = "gsensor_mma8452",
#ifdef CONFIG_PM
.pm = &sensor_pm_ops,
#endif
},
};
module_i2c_driver(gsensor_mma8452_driver);
MODULE_AUTHOR("luowei <lw@rock-chips.com>");
MODULE_DESCRIPTION("mma8452 3-Axis accelerometer driver");
MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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