--- /dev/null
+/* drivers/input/sensors/access/kxtik.c\r
+ *\r
+ * Copyright (C) 2012-2015 ROCKCHIP.\r
+ * Author: luowei <lw@rock-chips.com>\r
+ *\r
+ * This software is licensed under the terms of the GNU General Public\r
+ * License version 2, as published by the Free Software Foundation, and\r
+ * may be copied, distributed, and modified under those terms.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ */\r
+#include <linux/interrupt.h>\r
+#include <linux/i2c.h>\r
+#include <linux/slab.h>\r
+#include <linux/irq.h>\r
+#include <linux/miscdevice.h>\r
+#include <linux/gpio.h>\r
+#include <asm/uaccess.h>\r
+#include <asm/atomic.h>\r
+#include <linux/delay.h>\r
+#include <linux/input.h>\r
+#include <linux/workqueue.h>\r
+#include <linux/freezer.h>\r
+#include <mach/gpio.h>\r
+#include <mach/board.h> \r
+#ifdef CONFIG_HAS_EARLYSUSPEND\r
+#include <linux/earlysuspend.h>\r
+#endif\r
+#include <linux/l3g4200d.h>\r
+#include <linux/sensor-dev.h>\r
+\r
+#if 0\r
+#define SENSOR_DEBUG_TYPE SENSOR_TYPE_GYROSCOPE\r
+#define DBG(x...) if(sensor->pdata->type == SENSOR_DEBUG_TYPE) printk(x)\r
+#else\r
+#define DBG(x...)\r
+#endif\r
+\r
+#define L3G4200D_ENABLE 0x08\r
+\r
+/****************operate according to sensor chip:start************/\r
+\r
+static int sensor_active(struct i2c_client *client, int enable, int rate)\r
+{\r
+ struct sensor_private_data *sensor =\r
+ (struct sensor_private_data *) i2c_get_clientdata(client); \r
+ int result = 0;\r
+ int status = 0;\r
+ \r
+ sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);\r
+\r
+ //register setting according to chip datasheet \r
+ if(enable)\r
+ { \r
+ status = L3G4200D_ENABLE; //l3g20d \r
+ sensor->ops->ctrl_data |= status; \r
+ }\r
+ else\r
+ {\r
+ status = ~L3G4200D_ENABLE; //l3g20d\r
+ sensor->ops->ctrl_data &= status;\r
+ }\r
+\r
+ DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);\r
+ result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);\r
+ if(result)\r
+ printk("%s:fail to active sensor\n",__func__);\r
+\r
+ return result;\r
+\r
+}\r
+\r
+static int sensor_init(struct i2c_client *client)\r
+{ \r
+ struct sensor_private_data *sensor =\r
+ (struct sensor_private_data *) i2c_get_clientdata(client); \r
+ int result = 0; \r
+ unsigned char buf[5]; \r
+ unsigned char data = 0;\r
+ int i = 0;\r
+ \r
+ result = sensor->ops->active(client,0,0);\r
+ if(result)\r
+ {\r
+ printk("%s:line=%d,error\n",__func__,__LINE__);\r
+ return result;\r
+ }\r
+ \r
+ sensor->status_cur = SENSOR_OFF;\r
+ \r
+ buf[0] = 0x07; //27\r
+ buf[1] = 0x00; \r
+ buf[2] = 0x00; \r
+ buf[3] = 0x20; //0x00\r
+ buf[4] = 0x00; \r
+ for(i=0; i<5; i++)\r
+ {\r
+ result = sensor_write_reg(client, sensor->ops->ctrl_reg+i, buf[i]);\r
+ if(result)\r
+ {\r
+ printk("%s:line=%d,error\n",__func__,__LINE__);\r
+ return result;\r
+ }\r
+ }\r
+ \r
+ result = sensor_read_reg(client, sensor->ops->ctrl_reg);\r
+ if (result >= 0)\r
+ data = result & 0x000F;\r
+
+ sensor->ops->ctrl_data = data + ODR100_BW12_5; \r
+ result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);\r
+ if(result)\r
+ {\r
+ printk("%s:line=%d,error\n",__func__,__LINE__);\r
+ return result;\r
+ }\r
+ \r
+ return result;\r
+}\r
+\r
+\r
+static int gyro_report_value(struct i2c_client *client, struct sensor_axis *axis)\r
+{\r
+ struct sensor_private_data *sensor =\r
+ (struct sensor_private_data *) i2c_get_clientdata(client); \r
+\r
+ /* Report GYRO information */\r
+ input_report_rel(sensor->input_dev, ABS_RX, axis->x);\r
+ input_report_rel(sensor->input_dev, ABS_RY, axis->y);\r
+ input_report_rel(sensor->input_dev, ABS_RZ, axis->z);\r
+ input_sync(sensor->input_dev);\r
+ DBG("gyro x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);\r
+\r
+ return 0;\r
+}\r
+\r
+static int sensor_report_value(struct i2c_client *client)\r
+{\r
+ struct sensor_private_data *sensor =\r
+ (struct sensor_private_data *) i2c_get_clientdata(client); \r
+ struct sensor_platform_data *pdata = sensor->pdata;\r
+ int ret = 0;\r
+ int x = 0, y = 0, z = 0;\r
+ struct sensor_axis axis;\r
+ char buffer[6] = {0}; \r
+ int i = 0;\r
+ int value = 0;\r
+ \r
+ if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6\r
+ {\r
+ printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);\r
+ return -1;\r
+ }\r
+ \r
+ memset(buffer, 0, 6);\r
+#if 0 \r
+ /* Data bytes from hardware xL, xH, yL, yH, zL, zH */ \r
+ do {\r
+ buffer[0] = sensor->ops->read_reg;\r
+ ret = sensor_rx_data(client, buffer, sensor->ops->read_len);\r
+ if (ret < 0)\r
+ return ret;\r
+ } while (0);\r
+#else\r
+\r
+ for(i=0; i<6; i++)\r
+ {
+ //buffer[i] = sensor->ops->read_reg + i; \r
+ buffer[i] = sensor_read_reg(client, sensor->ops->read_reg + i);\r
+ }\r
+#endif\r
+ x = (short) (((buffer[1]) << 8) | buffer[0]);\r
+ y = (short) (((buffer[3]) << 8) | buffer[2]);\r
+ z = (short) (((buffer[5]) << 8) | buffer[4]);\r
+
+ DBG("%s: x=%d y=%d z=%d \n",__func__, x,y,z);
+ if(pdata && pdata->orientation)
+ {
+ 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;
+ }
+ else
+ {
+ axis.x = x;
+ axis.y = y;
+ axis.z = z;
+ }
+
+ //filter gyro data
+ if((abs(axis.x) > pdata->x_min)||(abs(axis.y) > pdata->y_min)||(abs(axis.z) > pdata->z_min))\r
+ { \r
+ gyro_report_value(client, &axis); \r
+\r
+ /* »¥³âµØ»º´æÊý¾Ý. */\r
+ mutex_lock(&(sensor->data_mutex) );\r
+ sensor->axis = axis;\r
+ mutex_unlock(&(sensor->data_mutex) );\r
+ } \r
+\r
+ if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register\r
+ {\r
+ \r
+ value = sensor_read_reg(client, sensor->ops->int_status_reg);\r
+ DBG("%s:sensor int status :0x%x\n",__func__,value);\r
+ }\r
+ \r
+ return ret;\r
+}\r
+\r
+\r
+static struct sensor_operate gyro_l3g20d_ops = {\r
+ .name = "l3g20d",\r
+ .type = SENSOR_TYPE_GYROSCOPE,//sensor type and it should be correct\r
+ .id_i2c = GYRO_ID_L3G20D, //i2c id number\r
+ .read_reg = GYRO_DATA_REG, //read data\r
+ .read_len = 6, //data length\r
+ .id_reg = GYRO_WHO_AM_I, //read device id from this register\r
+ .id_data = GYRO_DEVID_L3G20D, //device id\r
+ .precision = 8, //8 bits\r
+ .ctrl_reg = GYRO_CTRL_REG1, //enable or disable \r
+ .int_status_reg = GYRO_INT_SRC, //intterupt status register,if no exist then -1\r
+ .range = {-32768,32768}, //range\r
+ .trig = IRQF_TRIGGER_LOW|IRQF_ONESHOT, \r
+ .active = sensor_active, \r
+ .init = sensor_init,\r
+ .report = sensor_report_value,\r
+};\r
+\r
+/****************operate according to sensor chip:end************/\r
+\r
+//function name should not be changed\r
+static struct sensor_operate *gyro_get_ops(void)\r
+{\r
+ return &gyro_l3g20d_ops;\r
+}\r
+\r
+\r
+static int __init gyro_l3g20d_init(void)\r
+{\r
+ struct sensor_operate *ops = gyro_get_ops();\r
+ int result = 0;\r
+ int type = ops->type;\r
+ result = sensor_register_slave(type, NULL, NULL, gyro_get_ops);\r
+ DBG("%s\n",__func__);\r
+ return result;\r
+}\r
+\r
+static void __exit gyro_l3g20d_exit(void)\r
+{\r
+ struct sensor_operate *ops = gyro_get_ops();\r
+ int type = ops->type;\r
+ sensor_unregister_slave(type, NULL, NULL, gyro_get_ops);\r
+}\r
+\r
+\r
+module_init(gyro_l3g20d_init);\r
+module_exit(gyro_l3g20d_exit);\r
+\r
+\r
projects / firefly-linux-kernel-4.4.55.git / commitdiff