/* drivers/input/sensors/access/kxtik.c * * Copyright (C) 2012-2015 ROCKCHIP. * Author: luowei * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_HAS_EARLYSUSPEND #include #endif #include #define LIS3DH_INT_COUNT (0x0E) #define LIS3DH_WHO_AM_I (0x0F) /* full scale setting - register & mask */ #define LIS3DH_TEMP_CFG_REG (0x1F) #define LIS3DH_CTRL_REG1 (0x20) #define LIS3DH_CTRL_REG2 (0x21) #define LIS3DH_CTRL_REG3 (0x22) #define LIS3DH_CTRL_REG4 (0x23) #define LIS3DH_CTRL_REG5 (0x24) #define LIS3DH_CTRL_REG6 (0x25) #define LIS3DH_REFERENCE (0x26) #define LIS3DH_STATUS_REG (0x27) #define LIS3DH_OUT_X_L (0x28) #define LIS3DH_OUT_X_H (0x29) #define LIS3DH_OUT_Y_L (0x2a) #define LIS3DH_OUT_Y_H (0x2b) #define LIS3DH_OUT_Z_L (0x2c) #define LIS3DH_OUT_Z_H (0x2d) #define LIS3DH_FIFO_CTRL_REG (0x2E) #define LIS3DH_INT1_CFG (0x30) #define LIS3DH_INT1_SRC (0x31) #define LIS3DH_INT1_THS (0x32) #define LIS3DH_INT1_DURATION (0x33) #define LIS3DH_TT_CFG (0x38) #define LIS3DH_TT_THS (0x3a) #define LIS3DH_TT_LIM (0x3b) #define LIS3DH_TT_TLAT (0x3c) #define LIS3DH_TT_TW (0x3d) #define LIS3DH_DEVID (0x33) #define LIS3DH_ACC_DISABLE (0x08) #define LIS3DH_RANGE 2000000 /* LIS3DH */ #define LIS3DH_PRECISION 16 #define LIS3DH_ACC_ODR1 0x10 /* 1Hz output data rate */ #define LIS3DH_ACC_ODR10 0x20 /* 10Hz output data rate */ #define LIS3DH_ACC_ODR25 0x30 /* 25Hz output data rate */ #define LIS3DH_ACC_ODR50 0x40 /* 50Hz output data rate */ #define LIS3DH_ACC_ODR100 0x50 /* 100Hz output data rate */ #define LIS3DH_ACC_ODR200 0x60 /* 200Hz output data rate */ #define LIS3DH_ACC_ODR400 0x70 /* 400Hz output data rate */ #define LIS3DH_ACC_ODR1250 0x90 /* 1250Hz output data rate */ struct sensor_reg_data { char reg; char data; }; /****************operate according to sensor chip:start************/ /* odr table, hz */ struct odr_table { unsigned int cutoff_ms; unsigned int mask; }; static struct odr_table lis3dh_acc_odr_table[] = { {1, LIS3DH_ACC_ODR1250}, {3, LIS3DH_ACC_ODR400}, {5, LIS3DH_ACC_ODR200}, {10, LIS3DH_ACC_ODR100}, {20, LIS3DH_ACC_ODR50}, {40, LIS3DH_ACC_ODR25}, {100, LIS3DH_ACC_ODR10}, {1000, LIS3DH_ACC_ODR1}, }; static int lis3dh_select_odr(int want) { int i; int max_index = ARRAY_SIZE(lis3dh_acc_odr_table); for (i = max_index - 1; i >= 0; i--) { if ((lis3dh_acc_odr_table[i].cutoff_ms <= want) || (i == 0)) break; } return lis3dh_acc_odr_table[i].mask; } static int sensor_active(struct i2c_client *client, int enable, int rate/*ms*/) { struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); int result = 0; int status = 0; int odr_rate = 0; if (rate == 0) { dev_err(&client->dev, "%s: rate == 0!!!\n", __func__); return -1; } sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg); result = lis3dh_select_odr(odr_rate); sensor->ops->ctrl_data |= result; if (!enable) { status = LIS3DH_ACC_DISABLE; sensor->ops->ctrl_data |= status; } else { sensor->ops->init(client); status = ~LIS3DH_ACC_DISABLE; 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) { int result = 0; int i; struct sensor_reg_data reg_data[] = { {LIS3DH_CTRL_REG1, 0x07}, {LIS3DH_TEMP_CFG_REG, 0x00}, {LIS3DH_FIFO_CTRL_REG, 0x00}, {LIS3DH_TT_THS, 0x00}, {LIS3DH_TT_LIM, 0x00}, {LIS3DH_TT_TLAT, 0x00}, {LIS3DH_TT_TW, 0x00}, {LIS3DH_TT_CFG, 0x00}, {LIS3DH_INT1_THS, 0x7f}, {LIS3DH_INT1_DURATION, 0x7f}, {LIS3DH_INT1_CFG, 0xff}, {LIS3DH_CTRL_REG2, 0x00}, {LIS3DH_CTRL_REG3, 0x40}, {LIS3DH_CTRL_REG4, 0x08}, {LIS3DH_CTRL_REG5, 0x08}, {LIS3DH_CTRL_REG6, 0x40}, }; for (i = 0; i < (sizeof(reg_data) / sizeof(struct sensor_reg_data)); i++) { result = sensor_write_reg(client, reg_data[i].reg, reg_data[i].data); if (result) { dev_err(&client->dev, "%s:line=%d,i=%d,error\n", __func__, __LINE__, i); return result; } } 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; short x, y, z; struct sensor_axis axis; char buffer[6] = {0}; if (sensor->ops->read_len < 6) { dev_err(&client->dev, "%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 | 0x80; ret = sensor_rx_data(client, buffer, sensor->ops->read_len); if (ret < 0) { dev_err(&client->dev, "lis3dh read data failed, ret = %d\n", ret); return ret; } } while (0); x = ((buffer[1] << 8) & 0xff00) + (buffer[0] & 0xFF); y = ((buffer[3] << 8) & 0xff00) + (buffer[2] & 0xFF); z = ((buffer[5] << 8) & 0xff00) + (buffer[4] & 0xFF); 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)) sensor_read_reg(client, sensor->ops->int_status_reg); return ret; } static struct sensor_operate gsensor_lis3dh_ops = { .name = "lis3dh", .type = SENSOR_TYPE_ACCEL, .id_i2c = ACCEL_ID_LIS3DH, .read_reg = LIS3DH_OUT_X_L, .read_len = 6, .id_reg = LIS3DH_WHO_AM_I, .id_data = LIS3DH_DEVID, .precision = LIS3DH_PRECISION, .ctrl_reg = LIS3DH_CTRL_REG1, .int_status_reg = LIS3DH_INT1_SRC, .range = {-32768, +32768}, .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_lis3dh_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &gsensor_lis3dh_ops); } static int gsensor_lis3dh_remove(struct i2c_client *client) { return sensor_unregister_device(client, NULL, &gsensor_lis3dh_ops); } static const struct i2c_device_id gsensor_lis3dh_id[] = { {"gs_lis3dh", ACCEL_ID_LIS3DH}, {} }; static struct i2c_driver gsensor_lis3dh_driver = { .probe = gsensor_lis3dh_probe, .remove = gsensor_lis3dh_remove, .shutdown = sensor_shutdown, .id_table = gsensor_lis3dh_id, .driver = { .name = "gsensor_lis3dh", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(gsensor_lis3dh_driver); MODULE_AUTHOR("luowei "); MODULE_DESCRIPTION("lis3dh 3-Axis accelerometer driver"); MODULE_LICENSE("GPL");