1 /* drivers/input/sensors/access/kxtik.c
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3 * Copyright (C) 2012-2015 ROCKCHIP.
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4 * Author: Bruins <xwj@rock-chips.com>
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6 * This software is licensed under the terms of the GNU General Public
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7 * License version 2, as published by the Free Software Foundation, and
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8 * may be copied, distributed, and modified under those terms.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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17 #include <linux/interrupt.h>
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18 #include <linux/i2c.h>
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19 #include <linux/slab.h>
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20 #include <linux/irq.h>
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21 #include <linux/miscdevice.h>
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22 #include <linux/gpio.h>
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23 #include <asm/uaccess.h>
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24 #include <asm/atomic.h>
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25 #include <linux/delay.h>
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26 #include <linux/input.h>
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27 #include <linux/workqueue.h>
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28 #include <linux/freezer.h>
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29 #include <linux/of_gpio.h>
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30 #ifdef CONFIG_HAS_EARLYSUSPEND
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31 #include <linux/earlysuspend.h>
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33 #include <linux/sensor-dev.h>
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36 #define LSM303D_WHO_AM_I (0x0F)
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38 /* full scale setting - register & mask */
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39 #define LSM303D_CTRL_REG0 (0x1F)
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40 #define LSM303D_CTRL_REG1 (0x20)
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41 #define LSM303D_CTRL_REG2 (0x21)
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42 #define LSM303D_CTRL_REG3 (0x22)
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43 #define LSM303D_CTRL_REG4 (0x23)
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44 #define LSM303D_CTRL_REG5 (0x24)
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45 #define LSM303D_CTRL_REG6 (0x25)
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46 #define LSM303D_CTRL_REG7 (0x26)
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47 #define LSM303D_STATUS_REG (0x27)
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48 #define LSM303D_OUT_X_L (0x28)
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49 #define LSM303D_OUT_X_H (0x29)
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50 #define LSM303D_OUT_Y_L (0x2a)
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51 #define LSM303D_OUT_Y_H (0x2b)
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52 #define LSM303D_OUT_Z_L (0x2c)
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53 #define LSM303D_OUT_Z_H (0x2d)
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54 #define LSM303D_FIFO_CTRL_REG (0x2E)
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55 #define LSM303D_FIFO_SRC_REG (0X2F)
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57 #define LSM303D_IG_CFG1 (0x30)
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58 #define LSM303D_IG_SRC1 (0x31)
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59 #define LSM303D_IG_THS1 (0x32)
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60 #define LSM303D_IG_DURATION1 (0x33)
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62 #define LSM303D_IG_CFG2 (0x34)
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63 #define LSM303D_IG_SRC2 (0x35)
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64 #define LSM303D_IG_THS2 (0x36)
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65 #define LSM303D_IG_DURATION2 (0x37)
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68 #define LSM303D_DEVID (0x49) //chip id
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69 #define LSM303D_ACC_DISABLE (0x08)
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71 #define LSM303D_RANGE 2000000
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74 #define LSM303D_PRECISION 16
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75 #define LSM303D_BOUNDARY (0x1 << (LSM303D_PRECISION - 1))
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76 #define LSM303D_GRAVITY_STEP (LSM303D_RANGE / LSM303D_BOUNDARY)
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78 #define ODR3P25 0x10 /* 3.25Hz output data rate */
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79 #define ODR6P25 0x20 /* 6.25Hz output data rate */
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80 #define ODR12P5 0x30 /* 12.5Hz output data rate */
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81 #define ODR25 0x40 /* 25Hz output data rate */
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82 #define ODR50 0x50 /* 50Hz output data rate */
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83 #define ODR100 0x60 /* 100Hz output data rate */
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84 #define ODR200 0x70 /* 200Hz output data rate */
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85 #define ODR400 0x80 /* 400Hz output data rate */
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86 #define ODR800 0x90 /* 800Hz output data rate */
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87 #define ODR1600 0xA0 /* 1600Hz output data rate */
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90 struct sensor_reg_data {
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95 /****************operate according to sensor chip:start************/
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96 static int sensor_active(struct i2c_client *client, int enable, int rate)
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98 struct sensor_private_data *sensor =
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99 (struct sensor_private_data *) i2c_get_clientdata(client);
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103 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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105 sensor->ops->ctrl_data |= ODR100; //100HZ,if 0 then power down
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107 //register setting according to chip datasheet
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110 status = LSM303D_ACC_DISABLE; //lis3dh
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111 sensor->ops->ctrl_data |= status;
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115 status = ~LSM303D_ACC_DISABLE; //lis3dh
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116 sensor->ops->ctrl_data &= status;
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119 DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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120 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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122 printk("%s:fail to active sensor\n",__func__);
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129 static int sensor_init(struct i2c_client *client)
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131 struct sensor_private_data *sensor =
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132 (struct sensor_private_data *) i2c_get_clientdata(client);
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136 struct sensor_reg_data reg_data[] =
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138 {LSM303D_CTRL_REG0,0x00},
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139 {LSM303D_CTRL_REG1,0x07},
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140 {LSM303D_CTRL_REG2,0x00},
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141 {LSM303D_CTRL_REG3,0x00},
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142 {LSM303D_CTRL_REG4,0x00},
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143 {LSM303D_CTRL_REG5,0x78}, //High resolution output mode:11,
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144 {LSM303D_CTRL_REG6,0x20},
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145 {LSM303D_CTRL_REG7,0x00},
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146 {LSM303D_FIFO_CTRL_REG,0x00},
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147 {LSM303D_IG_CFG1,0xFF}, //6 direction position recognition
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148 {LSM303D_IG_THS1,0x7F}, //Interrupt 1 threshold
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149 {LSM303D_IG_DURATION1,0x7F}, //Duration value 0x00->ox7f
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152 {LSM303D_CTRL_REG7,0x00},
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153 {LSM303D_CTRL_REG4,0x08}, //High resolution output mode: 1, Normal mode
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154 {LSM303D_CTRL_REG6,0x40},
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156 {LSM303D_FIFO_CTRL_REG,0x00}, //
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157 {LSM303D_IG_CFG1,0xFF}, //6 direction position recognition
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158 {LSM303D_IG_THS1,0x7F}, //Interrupt 1 threshold
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159 {LSM303D_IG_DURATION1,0x7F}, //Duration value 0x00->ox7f
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163 result = sensor->ops->active(client,0,0);
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166 printk("%s:line=%d,error\n",__func__,__LINE__);
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170 sensor->status_cur = SENSOR_OFF;
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172 for(i=0;i<(sizeof(reg_data)/sizeof(struct sensor_reg_data));i++)
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174 result = sensor_write_reg(client, reg_data[i].reg, reg_data[i].data);
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177 printk("%s:line=%d,i=%d,error\n",__func__,__LINE__,i);
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183 if(sensor->pdata->irq_enable)
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186 result = sensor_write_reg(client, LSM303D_CTRL_REG3, 0x20);
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189 printk("%s:line=%d,error\n",__func__,__LINE__);
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193 i = sensor_read_reg(client,LSM303D_CTRL_REG5);
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195 result = sensor_write_reg(client, LSM303D_CTRL_REG5, (i|0x01));
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198 printk("%s:line=%d,error\n",__func__,__LINE__);
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208 static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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211 struct sensor_private_data *sensor =
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212 (struct sensor_private_data *) i2c_get_clientdata(client);
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214 switch (sensor->devid) {
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215 case LSM303D_DEVID:
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216 result = ((int)high_byte << 8) | (int)low_byte;
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217 if (result < LSM303D_BOUNDARY)
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218 result = result* LSM303D_GRAVITY_STEP;
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220 result = ~( ((~result & (0x7fff>>(16-LSM303D_PRECISION)) ) + 1)
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221 * LSM303D_GRAVITY_STEP) + 1;
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225 printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
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229 return (int)result;
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232 static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
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234 struct sensor_private_data *sensor =
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235 (struct sensor_private_data *) i2c_get_clientdata(client);
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237 /* Report acceleration sensor information */
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238 input_report_abs(sensor->input_dev, ABS_X, axis->x);
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239 input_report_abs(sensor->input_dev, ABS_Y, axis->y);
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240 input_report_abs(sensor->input_dev, ABS_Z, axis->z);
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241 input_sync(sensor->input_dev);
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242 DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
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247 #define GSENSOR_MIN 10
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248 static int sensor_report_value(struct i2c_client *client)
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250 struct sensor_private_data *sensor =
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251 (struct sensor_private_data *) i2c_get_clientdata(client);
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252 struct sensor_platform_data *pdata = sensor->pdata;
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255 struct sensor_axis axis;
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256 char buffer[6] = {0};
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259 if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
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261 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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265 memset(buffer, 0, 6);
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267 value = sensor_read_reg(client, LSM303D_STATUS_REG);
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268 if((value & 0x0f) == 0)
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270 printk("%s:line=%d,value=0x%x,data is not ready\n",__func__,__LINE__,value);
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275 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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277 *buffer = sensor->ops->read_reg;
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278 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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283 //this gsensor need 6 bytes buffer
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284 x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
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285 y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
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286 z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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288 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
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289 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
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290 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
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292 DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
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293 //printk( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
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295 //Report event only while value is changed to save some power
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296 if((abs(sensor->axis.x - axis.x) > GSENSOR_MIN) || (abs(sensor->axis.y - axis.y) > GSENSOR_MIN) || (abs(sensor->axis.z - axis.z) > GSENSOR_MIN))
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298 gsensor_report_value(client, &axis);
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300 /* »¥³âµØ»º´æÊý¾Ý. */
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301 mutex_lock(&(sensor->data_mutex) );
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302 sensor->axis = axis;
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303 mutex_unlock(&(sensor->data_mutex) );
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306 if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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309 value = sensor_read_reg(client, sensor->ops->int_status_reg);
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310 DBG("%s:sensor int status :0x%x\n",__func__,value);
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316 struct sensor_operate gsensor_lsm303d_ops = {
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318 .type = SENSOR_TYPE_ACCEL, //sensor type and it should be correct
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319 .id_i2c = ACCEL_ID_LSM303D, //i2c id number
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320 .read_reg = (LSM303D_OUT_X_L | 0x80), //read data
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321 .read_len = 6, //data length
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322 .id_reg = LSM303D_WHO_AM_I, //read device id from this register
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323 .id_data = LSM303D_DEVID, //device id
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324 .precision = LSM303D_PRECISION, //16 bits
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325 .ctrl_reg = LSM303D_CTRL_REG1, //enable or disable
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326 .int_status_reg = LSM303D_IG_SRC1, //intterupt status register
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327 .range = {-LSM303D_RANGE,LSM303D_RANGE}, //range
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328 .trig = (IRQF_TRIGGER_LOW|IRQF_ONESHOT),
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329 .active = sensor_active,
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330 .init = sensor_init,
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331 .report = sensor_report_value,
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335 /****************operate according to sensor chip:end************/
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337 //function name should not be changed
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338 static struct sensor_operate *gsensor_get_ops(void)
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340 return &gsensor_lsm303d_ops;
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344 static int __init gsensor_lis3dh_init(void)
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346 struct sensor_operate *ops = gsensor_get_ops();
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348 int type = ops->type;
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349 result = sensor_register_slave(type, NULL, NULL, gsensor_get_ops);
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353 static void __exit gsensor_lis3dh_exit(void)
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355 struct sensor_operate *ops = gsensor_get_ops();
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356 int type = ops->type;
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357 sensor_unregister_slave(type, NULL, NULL, gsensor_get_ops);
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361 module_init(gsensor_lis3dh_init);
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362 module_exit(gsensor_lis3dh_exit);
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