// SPDX-License-Identifier: GPL-2.0 /* * kernel/drivers/input/sensors/lsensor/ls_em3071x.c * * Copyright (C) 2020 Rockchip Electronics Co., Ltd. * Author: Wang Jie */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_HAS_EARLYSUSPEND #include #endif #include #define ALS_CMD 0x01 #define STA_TUS 0X02 #define ALS_DT1 0x09 #define ALS_DT2 0X0a #define ALS_THDL1 0X05 #define ALS_THDL2 0X06 #define ALS_THDH1 0X07 #define SW_RESET 0X0E /* ALS_CMD */ #define ALS_SD_ENABLE 0x06 #define ALS_SD_DISABLE 0xF8 #define ALS_INT_DISABLE (0 << 1) #define ALS_INT_ENABLE (1 << 1) #define ALS_1T_100MS (0 << 2) #define ALS_2T_200MS (1 << 2) #define ALS_4T_400MS (2 << 2) #define ALS_8T_800MS (3 << 2) #define ALS_RANGE_57671 (0 << 6) #define ALS_RANGE_28836 (1 << 6) /* PS_CMD */ #define PS_SD_ENABLE (0 << 0) #define PS_SD_DISABLE (1 << 0) #define PS_INT_DISABLE (0 << 1) #define PS_INT_ENABLE (1 << 1) #define PS_10T_2MS (0 << 2) #define PS_15T_3MS (1 << 2) #define PS_20T_4MS (2 << 2) #define PS_25T_5MS (3 << 2) #define PS_CUR_100MA (0 << 4) #define PS_CUR_200MA (1 << 4) #define PS_SLP_10MS (0 << 5) #define PS_SLP_30MS (1 << 5) #define PS_SLP_90MS (2 << 5) #define PS_SLP_270MS (3 << 5) #define TRIG_PS_OR_LS (0 << 7) #define TRIG_PS_AND_LS (1 << 7) /* STA_TUS */ #define STA_PS_INT (1 << 5) #define STA_ALS_INT (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_SD_ENABLE; sensor->ops->ctrl_data |= status; } else { status = ~ALS_SD_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; } dev_dbg(&client->dev, "%s:reg = 0x%x, reg_ctrl = 0x%x, enable= %d\n", __func__, sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable); 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, result = %d\n", __func__, __LINE__, result); return result; } sensor->status_cur = SENSOR_OFF; result = sensor_write_reg(client, SW_RESET, 0); if (result) { dev_err(&client->dev, "%s: fail to set SW_RESET(%d)\n", __func__, result); return result; } /* it is important,if not then als can not trig intterupt */ result = sensor_write_reg(client, ALS_THDL1, 0); if (result) { dev_err(&client->dev, "%s: fail to set ALS_THDL1(%d)\n", __func__, result); return result; } result = sensor_write_reg(client, ALS_THDL2, 0XF0); if (result) { dev_err(&client->dev, "%s: fail to set ALS_THDL2(%d)\n", __func__, result); return result; } result = sensor_write_reg(client, ALS_THDH1, 0XFF); if (result) { dev_err(&client->dev, "%s: fail to set ALS_THDH1(%d)\n", __func__, result); return result; } result = sensor_write_reg(client, STA_TUS, 0X00); if (result) { dev_err(&client->dev, "%s: fail to set STA_TUS(%d)\n", __func__, result); return result; } return result; } static int light_report_value(struct input_dev *input, int data) { unsigned char index = 0; if (data <= 10) { index = 0; goto report; } else if (data <= 60) { index = 1; goto report; } else if (data <= 122) { index = 2; goto report; } else if (data <= 200) { index = 3; goto report; } else if (data <= 400) { index = 4; goto report; } else if (data <= 800) { index = 5; goto report; } else if (data <= 1260) { 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 = 0; char buffer[2] = {0}; char index = 0; buffer[0] = sensor_read_reg(client, 0X09); buffer[1] = sensor_read_reg(client, 0X0A); value = ((buffer[1] & 0X0F) << 8) | buffer[0]; index = light_report_value(sensor->input_dev, value); dev_dbg(&client->dev, "%s: value = %d, index = %d\n", __func__, value, index); if (sensor->pdata->irq_enable) { value = sensor_read_reg(client, sensor->ops->int_status_reg); if (value & STA_ALS_INT) { value &= ~STA_ALS_INT; result = sensor_write_reg(client, sensor->ops->int_status_reg, value); if (result) { dev_err(&client->dev, "%s:write status reg error(%d)\n", __func__, result); return result; } } } return result; } static struct sensor_operate light_em3071x_ops = { .name = "ls_em3071x", .type = SENSOR_TYPE_LIGHT, .id_i2c = LIGHT_ID_EM3071X, .read_reg = ALS_DT1, .read_len = 2, .id_reg = SENSOR_UNKNOW_DATA, .id_data = SENSOR_UNKNOW_DATA, .precision = 16, .ctrl_reg = ALS_CMD, .int_status_reg = STA_TUS, .range = {100, 65535}, .brightness = {10, 255}, .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, .active = sensor_active, .init = sensor_init, .report = sensor_report_value, }; /****************operate according to sensor chip:end************/ static int light_em3071x_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &light_em3071x_ops); } static void light_em3071x_remove(struct i2c_client *client) { sensor_unregister_device(client, NULL, &light_em3071x_ops); } static const struct i2c_device_id light_em3071x_id[] = { {"ls_em3071x", LIGHT_ID_EM3071X}, {} }; static struct i2c_driver light_em3071x_driver = { .probe = light_em3071x_probe, .remove = (void *)light_em3071x_remove, .shutdown = sensor_shutdown, .id_table = light_em3071x_id, .driver = { .name = "light_em3071x", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(light_em3071x_driver); MODULE_AUTHOR("Wang Jie "); MODULE_DESCRIPTION("em3071x light driver"); MODULE_LICENSE("GPL");