362 lines
8.9 KiB
C
362 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2022 Rockchip Electronics Co. Ltd.
|
|
*
|
|
* Author: Kay Guo <kay.guo@rock-chips.com>
|
|
*/
|
|
#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
|
|
|
|
/* 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)
|
|
|
|
#define PS_PULSE_NUM(X) (X)
|
|
#define LED_PULSE_WIDTH (0x0f)
|
|
|
|
|
|
static int ps_threshold_low;
|
|
static int ps_threshold_high;
|
|
|
|
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 = ~PS_ENABLE;
|
|
sensor->ops->ctrl_data &= status;
|
|
} else {
|
|
status = PS_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 ps_val = 0;
|
|
int result = 0;
|
|
int val = 0;
|
|
|
|
result = sensor->ops->active(client, 0, 0);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:sensor active fail\n", __func__);
|
|
return result;
|
|
}
|
|
sensor->status_cur = SENSOR_OFF;
|
|
|
|
result = of_property_read_u32(np, "ps_threshold_low", &ps_val);
|
|
if (result)
|
|
dev_err(&client->dev, "%s:Unable to read ps_threshold_low\n",
|
|
__func__);
|
|
|
|
ps_threshold_low = ps_val;
|
|
result = sensor_write_reg(client, PS_THR_LH,
|
|
(unsigned char)(ps_val >> 8));
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write PS_THR_LH fail\n", __func__);
|
|
return result;
|
|
}
|
|
result = sensor_write_reg(client, PS_THR_LL, (unsigned char)ps_val);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write PS_THR_LL fail\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
result = of_property_read_u32(np, "ps_threshold_high", &ps_val);
|
|
if (result)
|
|
dev_err(&client->dev, "%s:Unable to read ps_threshold_high\n",
|
|
__func__);
|
|
|
|
ps_threshold_high = ps_val;
|
|
result = sensor_write_reg(client, PS_THR_HH,
|
|
(unsigned char)(ps_val >> 8));
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write PS_THR_HH fail\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
result = sensor_write_reg(client, PS_THR_HL, (unsigned char)ps_val);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write PS_THR_HL fail\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
result = of_property_read_u32(np, "ps_ctrl_gain", &ps_val);
|
|
if (result)
|
|
dev_err(&client->dev, "%s:Unable to read ps_ctrl_gain\n",
|
|
__func__);
|
|
|
|
result = sensor_write_reg(client, PS_GAIN, (unsigned char)ps_val);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write PS_GAIN fail\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
result = of_property_read_u32(np, "ps_led_current", &ps_val);
|
|
if (result)
|
|
dev_err(&client->dev, "%s:Unable to read ps_led_current\n",
|
|
__func__);
|
|
|
|
result |= sensor_write_reg(client, LED_CTRL,
|
|
(unsigned char)((ps_val << 6) | LED_PULSE_WIDTH));
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write LED_CTRL fail\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
val = sensor_read_reg(client, INT_CTRL);
|
|
if (sensor->pdata->irq_enable) {
|
|
val |= PINT_ENABLE;
|
|
val |= PS_PEND_EN;
|
|
} else {
|
|
val &= PINT_DISABLE;
|
|
}
|
|
result = sensor_write_reg(client, INT_CTRL, val);
|
|
if (result) {
|
|
dev_err(&client->dev, "%s:write INT_CTRL fail\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int ucs14620_get_ps_value(int ps)
|
|
{
|
|
int index = 0;
|
|
static int value = 1;
|
|
|
|
if (ps > ps_threshold_high) {
|
|
index = 0;
|
|
value = 0;
|
|
} else if (ps < ps_threshold_low) {
|
|
index = 1;
|
|
value = 1;
|
|
} else {
|
|
index = value;
|
|
}
|
|
|
|
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 = 0;
|
|
char buffer[2] = { 0 };
|
|
int index = 1;
|
|
|
|
if (sensor->ops->read_len < 2) {
|
|
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;
|
|
}
|
|
value = (buffer[1] << 8) | buffer[0];
|
|
if (sensor->pdata->irq_enable && sensor->ops->int_status_reg) {
|
|
value = sensor_read_reg(client, sensor->ops->int_status_reg);
|
|
if (value & PS_INT_FLAG)
|
|
index = 0;
|
|
else
|
|
index = 1;
|
|
input_report_abs(sensor->input_dev, ABS_DISTANCE, index);
|
|
input_sync(sensor->input_dev);
|
|
value &= ~PS_INT_FLAG;
|
|
result = sensor_write_reg(client,
|
|
sensor->ops->int_status_reg,
|
|
value);
|
|
|
|
dev_dbg(&client->dev, "%s object near = %d", sensor->ops->name, index);
|
|
|
|
if (result) {
|
|
dev_err(&client->dev, "write status reg error\n");
|
|
return result;
|
|
}
|
|
} else if (!sensor->pdata->irq_enable) {
|
|
index = ucs14620_get_ps_value(value);
|
|
input_report_abs(sensor->input_dev, ABS_DISTANCE, index);
|
|
input_sync(sensor->input_dev);
|
|
dev_dbg(&client->dev, "%s sensor closed=%d\n",
|
|
sensor->ops->name, index);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static struct sensor_operate psensor_ucs14620_ops = {
|
|
.name = "ps_ucs14620",
|
|
.type = SENSOR_TYPE_PROXIMITY,
|
|
.id_i2c = PROXIMITY_ID_UCS14620,
|
|
.read_reg = PS_DATA_L,
|
|
.read_len = 2,
|
|
.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 proximity_ucs14620_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *devid)
|
|
{
|
|
return sensor_register_device(client, NULL, devid, &psensor_ucs14620_ops);
|
|
}
|
|
|
|
static int proximity_ucs14620_remove(struct i2c_client *client)
|
|
{
|
|
return sensor_unregister_device(client, NULL, &psensor_ucs14620_ops);
|
|
}
|
|
|
|
static const struct i2c_device_id proximity_ucs14620_id[] = {
|
|
{ "ps_ucs14620", PROXIMITY_ID_UCS14620 },
|
|
{}
|
|
};
|
|
|
|
static struct i2c_driver proximity_ucs14620_driver = {
|
|
.probe = proximity_ucs14620_probe,
|
|
.remove = proximity_ucs14620_remove,
|
|
.shutdown = sensor_shutdown,
|
|
.id_table = proximity_ucs14620_id,
|
|
.driver = {
|
|
.name = "ps_ucs14620",
|
|
#ifdef CONFIG_PM
|
|
.pm = &sensor_pm_ops,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
module_i2c_driver(proximity_ucs14620_driver);
|
|
|
|
MODULE_AUTHOR("Kay Guo<yangbin@rock-chips.com>");
|
|
MODULE_DESCRIPTION("ucs14620 proximity driver");
|
|
MODULE_LICENSE("GPL");
|