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光感传感器 芯片ucs14620 linux 驱动

🕗 发布于 2024-11-07 15:18 linux  运维  服务器  

// SPDX-License-Identifier: GPL-2.0
/*

  • Copyright © 2022 Electronics Co. Ltd.

*/
#include <linux/atomic.h>
#include <linux/delay.h>
#ifdef CONFIG_HAS_EARLYSUSPEND
#include <linux/earlysuspend.h>
#endif
#include <linux/freezer.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/miscdevice.h>
#include <linux/of_gpio.h>
#include <linux/sensor-dev.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/workqueue.h>

#define SYSM_CTRL 0x00
#define INT_CTRL 0x01
#define INT_FLAG 0x02
#define WAIT_TIME 0x03
#define ALS_GAIN 0x04
#define ALS_TIME 0x05
#define LED_CTRL 0x06
#define PS_GAIN 0x07
#define PS_PULSE 0x08
#define PS_TIME 0x09

#define PERSISTENCE 0x0B
#define ALS_THR_LL 0x0C
#define ALS_THR_LH 0x0D
#define ALS_THR_HL 0x0E
#define ALS_THR_HH 0x0F
#define PS_THR_LL 0x10
#define PS_THR_LH 0x11
#define PS_THR_HL 0x12
#define PS_THR_HH 0x13
#define PS_OFFSET_L 0x14
#define PS_OFFSET_H 0x15
#define INT_SOURCE 0x16
#define ERROR_FLAG 0x17
#define PS_DATA_L 0x18
#define PS_DATA_H 0x19
#define IR_DATA_L 0x1A
#define IR_DATA_H 0x1B
#define CH0_DATA_L 0x1C
#define CH0_DATA_H 0x1D
#define CH1_DATA_L 0x1E
#define CH1_DATA_H 0x1F

/* SYSM_CTRL 0x00 */
#define ALS_DISABLE (0 << 0)
#define ALS_ENABLE (1 << 0)
#define PS_DISABLE (0 << 1)
#define PS_ENABLE (1 << 1)
#define FRST_DISABLE (0 << 5)
#define FRST_ENABLE (1 << 5)
#define WAIT_DISABLE (0 << 6)
#define WAIT_ENABLE (1 << 6)
#define SWRST_START (1 << 7)

/* INT_CTRL 0x01 */
#define AINT_DISABLE (0 << 0)
#define AINT_ENABLE (1 << 0)
#define PINT_DISABLE (0 << 1)
#define PINT_ENABLE (1 << 1)
#define ALS_PEND_EN (1 << 4)
#define ALS_PEND_DIS (0 << 4)
#define PS_PEND_EN (1 << 5)
#define PS_PEND_DIS (0 << 5)
#define SPEED_UP_EN (1 << 6)
#define SPEED_UP_DIS (0 << 6)
#define PS_INT_HYS (0 << 7)
#define PS_INT_ZONE (1 << 7)

/* INT_FLAG 0x02 */
#define ALS_INT_FLAG (1 << 0)
#define PS_INT_FLAG (1 << 1)
#define OBJ_DET_FLAG (1 << 5)
#define DATA_INVALID (1 << 6)
#define POWER_ON_FLAG (1 << 7)

/* WAIT_TIME 0x03 /
#define WAIT_TIME_5MS(X) (X)
/ ALS_GAIN 0x04*/
#define ALS_GAIN_1 0x00
#define ALS_GAIN_4 0x01
#define ALS_GAIN_8 0x02
#define ALS_GAIN_32 0x03
#define ALS_GAIN_96 0x04
#define ALS_GAIN_192 0x05
#define ALS_GAIN_368 0x06

/* ALS_TIME 0x05 /
#define ALS_GET_TIME 0x30
/ LED_CTRL */
#define IR_12_5MA (0 << 6)
#define IR_100MA (1 << 6)
#define IR_150MA (2 << 6)
#define IR_200MA (3 << 6)

/* PS_GAIN 0x07 */
#define PS_GAIN_1 (1 << 0)
#define PS_GAIN_2 (1 << 1)
#define PS_GAIN_4 (1 << 2)
#define PS_GAIN_8 (1 << 4)

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 = ~ALS_ENABLE;
sensor->ops->ctrl_data &= status;
} else {
status |= ALS_ENABLE;
sensor->ops->ctrl_data |= status;
}

dev_dbg(&client->dev, "reg=0x%x, reg_ctrl=0x%x, enable=%d\n",
sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);

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);
struct device_node *np = client->dev.of_node;
int als_val = 0;
int val = 0;
int ret = 0;

ret = sensor->ops->active(client, 0, 0);
if (ret) {
dev_err(&client->dev, "%s:sensor active fail\n", __func__);
return ret;
}
sensor->status_cur = SENSOR_OFF;

ret = of_property_read_u32(np, "als_threshold_low", &als_val);
if (ret)
dev_err(&client->dev, "%s:Unable to read als_threshold_low\n",
__func__);
ret = sensor_write_reg(client, ALS_THR_LH,
       (unsigned char)(als_val >> 8));
if (ret) {
dev_err(&client->dev, "%s:write ALS_THR_LH fail\n", __func__);
return ret;
}

ret = sensor_write_reg(client, ALS_THR_LL, (unsigned char)als_val);
if (ret) {
dev_err(&client->dev, "%s:write ALS_THR_LL fail\n", __func__);
return ret;
}

ret = of_property_read_u32(np, "als_threshold_high", &als_val);
if (ret)
dev_err(&client->dev, "%s:Unable to read als_threshold_high\n",
__func__);

ret = sensor_write_reg(client, ALS_THR_HH,
       (unsigned char)(als_val >> 8));
if (ret) {
dev_err(&client->dev, "%s:write ALS_THR_HH fail\n", __func__);
return ret;
}

ret = sensor_write_reg(client, ALS_THR_HL, (unsigned char)als_val);
if (ret) {
dev_err(&client->dev, "%s:write ALS_THR_HL fail\n", __func__);
return ret;
}

ret = of_property_read_u32(np, "als_ctrl_gain", &als_val);
if (ret)
dev_err(&client->dev, "%s:Unable to read als_ctrl_gain\n",
__func__);

ret = sensor_write_reg(client, ALS_GAIN, (unsigned char)als_val);
if (ret) {
dev_err(&client->dev, "%s:write ALS_GAIN fail\n", __func__);
return ret;
}


ret = of_property_read_u32(np, "als_ctrl_time", &als_val);
if (ret)
dev_err(&client->dev, "%s:Unable to read als_ctrl_time\n",
__func__);

ret = sensor_write_reg(client, ALS_TIME, (unsigned char)als_val);
if (ret) {
dev_err(&client->dev, "%s:write ALS_TIME fail\n", __func__);
return ret;
}

val = sensor_read_reg(client, INT_CTRL);
if (sensor->pdata->irq_enable)
val |= AINT_ENABLE;
else
val &= ~AINT_ENABLE;
ret = sensor_write_reg(client, INT_CTRL, val);
if (ret) {
dev_err(&client->dev, "%s:write INT_CTRL fail\n", __func__);
return ret;
}

return ret;

}

static int light_report_value(struct input_dev *input, int data)
{
unsigned char index = 0;

if (data <= 50) {
index = 0;
goto report;
} else if (data <= 160) {
index = 1;
goto report;
} else if (data <= 640) {
index = 2;
goto report;
} else if (data <= 1280) {
index = 3;
goto report;
} else if (data <= 2600) {
index = 4;
goto report;
} else if (data <= 10240) {
index = 5;
goto report;
} else if (data <= 20000) {
index = 6;
goto report;
} else {
index = 7;
goto report;
}

report:
input_report_abs(input, ABS_MISC, index);
input_sync(input);
return index;
}

static int sensor_report_value(struct i2c_client *client)
{
struct sensor_private_data *sensor =
(struct sensor_private_data *)i2c_get_clientdata(client);
int result = 0;
int value, ch0_value = 0;
int index = 0;
char buffer[4] = { 0 };

if (sensor->ops->read_len < 4) {
dev_err(&client->dev, "%s:length is error, len=%d\n", __func__,
sensor->ops->read_len);
return -EINVAL;
}

buffer[0] = sensor->ops->read_reg;
result = sensor_rx_data(client, buffer, sensor->ops->read_len);
if (result) {
dev_err(&client->dev, "%s:sensor read data fail\n", __func__);
return result;
}
ch0_value = (buffer[1] << 8) | buffer[0];
index = light_report_value(sensor->input_dev, ch0_value);
dev_dbg(&client->dev, "%s result=0x%x, ch0_index=%d\n",
sensor->ops->name, ch0_value, index);

if (sensor->pdata->irq_enable && sensor->ops->int_status_reg) {
value = sensor_read_reg(client, sensor->ops->int_status_reg);
if (value & ALS_INT_FLAG) {
value &= ~ALS_INT_FLAG;
result = sensor_write_reg(client,
  sensor->ops->int_status_reg,
  value);
if (result) {
dev_err(&client->dev, "write status reg error\n");
return result;
}
}
}

return result;

}

static struct sensor_operate light_ucs14620_ops = {
.name = “ls_ucs14620”,
.type = SENSOR_TYPE_LIGHT,
.id_i2c = LIGHT_ID_UCS14620,
.read_reg = CH0_DATA_L,
.read_len = 4,
.id_reg = SENSOR_UNKNOW_DATA,
.id_data = SENSOR_UNKNOW_DATA,
.precision = 16,
.ctrl_reg = SYSM_CTRL,
.int_status_reg = INT_FLAG,
.range = { 100, 65535 },
.brightness = { 10, 255 },
.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
.active = sensor_active,
.init = sensor_init,
.report = sensor_report_value,
};

static int light_ucs14620_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
return sensor_register_device(client, NULL, devid, &light_ucs14620_ops);
}

static int light_ucs14620_remove(struct i2c_client *client)
{
return sensor_unregister_device(client, NULL, &light_ucs14620_ops);
}

static const struct i2c_device_id light_ucs14620_id[] = {
{ “ls_ucs14620”, LIGHT_ID_UCS14620 },
{}
};

static struct i2c_driver light_ucs14620_driver = {
.probe = light_ucs14620_probe,
.remove = light_ucs14620_remove,
.shutdown = sensor_shutdown,
.id_table = light_ucs14620_id,
.driver = {
.name = “light_ucs14620”,
#ifdef CONFIG_PM
.pm = &sensor_pm_ops,
#endif
},
};

module_i2c_driver(light_ucs14620_driver);

MODULE_AUTHOR(“qq712288614”);
MODULE_DESCRIPTION(“ucs14620 light driver”);
MODULE_LICENSE(“GPL”);


原文地址：https://blog.csdn.net/baidu_37552881/article/details/143574456

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