1 /* drivers/input/sensors/access/dmard10.c
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3 * Copyright (C) 2012-2015 ROCKCHIP.
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4 * Author: guoyi <gy@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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16 #include <linux/interrupt.h>
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17 #include <linux/i2c.h>
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18 #include <linux/slab.h>
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19 #include <linux/irq.h>
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20 #include <linux/miscdevice.h>
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21 #include <linux/gpio.h>
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22 #include <asm/uaccess.h>
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23 #include <asm/atomic.h>
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24 #include <linux/delay.h>
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25 #include <linux/input.h>
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26 #include <linux/workqueue.h>
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27 #include <linux/freezer.h>
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28 #include <linux/of_gpio.h>
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29 #ifdef CONFIG_HAS_EARLYSUSPEND
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30 #include <linux/earlysuspend.h>
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32 #include <linux/sensor-dev.h>
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34 /* Default register settings */
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35 #define RBUFF_SIZE 12 /* Rx buffer size */
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37 #define REG_ACTR 0x00
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38 #define REG_WDAL 0x01
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39 #define REG_TAPNS 0x0f
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40 #define REG_MISC2 0x1f
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41 #define REG_AFEM 0x0c
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42 #define REG_CKSEL 0x0d
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43 #define REG_INTC 0x0e
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44 #define REG_STADR 0x12
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45 #define REG_STAINT 0x1C
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47 #define REG_TCGYZ 0x26
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48 #define REG_X_OUT 0x41
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50 #define MODE_Off 0x00
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51 #define MODE_ResetAtOff 0x01
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52 #define MODE_Standby 0x02
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53 #define MODE_ResetAtStandby 0x03
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54 #define MODE_Active 0x06
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55 #define MODE_Trigger 0x0a
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56 #define MODE_ReadOTP 0x12
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57 #define MODE_WriteOTP 0x22
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58 #define MODE_WriteOTPBuf 0x42
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59 #define MODE_ResetDataPath 0x82
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61 #define VALUE_STADR 0x55
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62 #define VALUE_STAINT 0xAA
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63 #define VALUE_AFEM_AFEN_Normal 0x8f// AFEN set 1 , ATM[2:0]=b'000(normal),EN_Z/Y/X/T=1
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64 #define VALUE_AFEM_Normal 0x0f// AFEN set 0 , ATM[2:0]=b'000(normal),EN_Z/Y/X/T=1
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65 #define VALUE_INTC 0x00// INTC[6:5]=b'00
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66 #define VALUE_INTC_Interrupt_En 0x20// INTC[6:5]=b'01 (Data ready interrupt enable, active high at INT0)
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67 #define VALUE_CKSEL_ODR_0_204 0x04// ODR[3:0]=b'0000 (0.78125Hz), CCK[3:0]=b'0100 (204.8kHZ)
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68 #define VALUE_CKSEL_ODR_1_204 0x14// ODR[3:0]=b'0001 (1.5625Hz), CCK[3:0]=b'0100 (204.8kHZ)
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69 #define VALUE_CKSEL_ODR_3_204 0x24// ODR[3:0]=b'0010 (3.125Hz), CCK[3:0]=b'0100 (204.8kHZ)
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70 #define VALUE_CKSEL_ODR_6_204 0x34// ODR[3:0]=b'0011 (6.25Hz), CCK[3:0]=b'0100 (204.8kHZ)
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71 #define VALUE_CKSEL_ODR_12_204 0x44// ODR[3:0]=b'0100 (12.5Hz), CCK[3:0]=b'0100 (204.8kHZ)
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72 #define VALUE_CKSEL_ODR_25_204 0x54// ODR[3:0]=b'0101 (25Hz), CCK[3:0]=b'0100 (204.8kHZ)
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73 #define VALUE_CKSEL_ODR_50_204 0x64// ODR[3:0]=b'0110 (50Hz), CCK[3:0]=b'0100 (204.8kHZ)
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74 #define VALUE_CKSEL_ODR_100_204 0x74// ODR[3:0]=b'0111 (100Hz), CCK[3:0]=b'0100 (204.8kHZ)
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76 #define VALUE_TAPNS_NoFilter 0x00 // TAP1/TAP2 NO FILTER
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77 #define VALUE_TAPNS_Ave_2 0x11 // TAP1/TAP2 Average 2
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78 #define VALUE_TAPNS_Ave_4 0x22 // TAP1/TAP2 Average 4
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79 #define VALUE_TAPNS_Ave_8 0x33 // TAP1/TAP2 Average 8
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80 #define VALUE_TAPNS_Ave_16 0x44 // TAP1/TAP2 Average 16
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81 #define VALUE_TAPNS_Ave_32 0x55 // TAP1/TAP2 Average 32
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82 #define VALUE_MISC2_OSCA_EN 0x08
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83 #define VALUE_PD_RST 0x52
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86 //#define DMARD10_REG_INTSU 0x47
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87 //#define DMARD10_REG_MODE 0x44
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88 //#define DMARD10_REG_SR 0x44
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91 #define DMARD10_REG_DS 0X49
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92 #define DMARD10_REG_ID 0X0F
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93 #define DMARD10_REG_IT 0X4D
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94 #define DMARD10_REG_INTSRC1_C 0X4A
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95 #define DMARD10_REG_INTSRC1_S 0X4B
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98 // IOCTLs for DMARD10 library
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99 #define ECS_IOCTL_INIT _IO(MMAIO, 0x01)
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100 #define ECS_IOCTL_RESET _IO(MMAIO, 0x04)
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101 #define ECS_IOCTL_CLOSE _IO(MMAIO, 0x02)
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102 #define ECS_IOCTL_START _IO(MMAIO, 0x03)
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103 #define ECS_IOCTL_GETDATA _IOR(MMAIO, 0x08, char[RBUFF_SIZE+1])
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104 #define SENSOR_CALIBRATION _IOWR(MMAIO, 0x05 , int[SENSOR_DATA_SIZE])
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106 // IOCTLs for APPs
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107 #define ECS_IOCTL_APP_SET_RATE _IOW(MMAIO, 0x10, char)
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110 #define DMARD10_RANGE 2000000
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112 #define DMARD10_RATE_32 32
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114 #define DMARD10_RATE_64 64
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115 #define DMARD10_RATE_120 128
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116 #define DMARD10_RATE_MIN DMARD10_RATE_1
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117 #define DMARD10_RATE_MAX DMARD10_RATE_120
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120 #define DMARD10_OPEN 1
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121 #define DMARD10_CLOSE 0
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122 #define DMARD10_NORMAL 2
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123 #define DMARD10_LOWPOWER 3
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127 #define DMARD10_IIC_ADDR 0x18
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128 #define DMARD10_REG_LEN 11
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131 #define DMARD10_FATOR 15
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134 #define DMARD10_X_OUT 0x41
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135 #define SENSOR_DATA_SIZE 3
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136 #define DMARD10_SENSOR_RATE_1 0
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137 #define DMARD10_SENSOR_RATE_2 1
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138 #define DMARD10_SENSOR_RATE_3 2
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139 #define DMARD10_SENSOR_RATE_4 3
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141 #define POWER_OR_RATE 1
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143 #define DMARD10_INTERRUPUT 1
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144 #define DMARD10_POWERDOWN 0
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145 #define DMARD10_POWERON 1
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147 //g-senor layout configuration, choose one of the following configuration
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150 #define SENSOR_DATA_SIZE 3
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151 #define DEFAULT_SENSITIVITY 1024
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155 #define DMARD10_ENABLE 1
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157 #define DMARD10_REG_X_OUT 0x12
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158 #define DMARD10_REG_Y_OUT 0x1
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159 #define DMARD10_REG_Z_OUT 0x2
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160 #define DMARD10_REG_TILT 0x3
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161 #define DMARD10_REG_SRST 0x4
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162 #define DMARD10_REG_SPCNT 0x5
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163 #define DMARD10_REG_INTSU 0x6
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164 #define DMARD10_REG_MODE 0x7
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165 #define DMARD10_REG_SR 0x8
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166 #define DMARD10_REG_PDET 0x9
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167 #define DMARD10_REG_PD 0xa
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169 #define DMARD10_RANGE 4000000
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170 #define DMARD10_PRECISION 10
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171 #define DMARD10_BOUNDARY (0x1 << (DMARD10_PRECISION - 1))
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172 #define DMARD10_GRAVITY_STEP (DMARD10_RANGE / DMARD10_BOUNDARY)
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175 struct sensor_axis_average {
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182 static struct sensor_axis_average axis_average;
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183 int gsensor_reset(struct i2c_client *client){
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184 struct sensor_private_data *sensor =
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185 (struct sensor_private_data *) i2c_get_clientdata(client);
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187 char buffer[7], buffer2[2];
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188 /* 1. check D10 , VALUE_STADR = 0x55 , VALUE_STAINT = 0xAA */
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189 buffer[0] = REG_STADR;
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190 buffer2[0] = REG_STAINT;
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192 sensor_rx_data(client, buffer, 2);
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193 sensor_rx_data(client, buffer2, 2);
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195 if( buffer[0] == VALUE_STADR || buffer2[0] == VALUE_STAINT){
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196 DBG(KERN_INFO " REG_STADR_VALUE = %d , REG_STAINT_VALUE = %d\n", buffer[0], buffer2[0]);
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197 DBG(KERN_INFO " %s DMT_DEVICE_NAME registered I2C driver!\n",__FUNCTION__);
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200 DBG(KERN_INFO " %s gsensor I2C err @@@ REG_STADR_VALUE = %d , REG_STAINT_VALUE = %d \n", __func__, buffer[0], buffer2[0]);
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203 /* 2. Powerdown reset */
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204 buffer[0] = REG_PD;
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205 buffer[1] = VALUE_PD_RST;
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206 sensor_tx_data(client, buffer, 2);
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207 /* 3. ACTR => Standby mode => Download OTP to parameter reg => Standby mode => Reset data path => Standby mode */
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208 buffer[0] = REG_ACTR;
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209 buffer[1] = MODE_Standby;
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210 buffer[2] = MODE_ReadOTP;
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211 buffer[3] = MODE_Standby;
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212 buffer[4] = MODE_ResetDataPath;
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213 buffer[5] = MODE_Standby;
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214 sensor_tx_data(client, buffer, 6);
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215 /* 4. OSCA_EN = 1 ,TSTO = b'000(INT1 = normal, TEST0 = normal) */
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216 buffer[0] = REG_MISC2;
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217 buffer[1] = VALUE_MISC2_OSCA_EN;
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218 sensor_tx_data(client, buffer, 2);
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219 /* 5. AFEN = 1(AFE will powerdown after ADC) */
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220 buffer[0] = REG_AFEM;
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221 buffer[1] = VALUE_AFEM_AFEN_Normal;
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222 buffer[2] = VALUE_CKSEL_ODR_100_204;
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223 buffer[3] = VALUE_INTC;
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224 buffer[4] = VALUE_TAPNS_Ave_2;
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225 buffer[5] = 0x00; // DLYC, no delay timing
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226 buffer[6] = 0x07; // INTD=1 (push-pull), INTA=1 (active high), AUTOT=1 (enable T)
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227 sensor_tx_data(client, buffer, 7);
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228 /* 6. write TCGYZ & TCGX */
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229 buffer[0] = REG_WDAL; // REG:0x01
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230 buffer[1] = 0x00; // set TC of Y,Z gain value
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231 buffer[2] = 0x00; // set TC of X gain value
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232 buffer[3] = 0x03; // Temperature coefficient of X,Y,Z gain
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233 sensor_tx_data(client, buffer, 4);
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235 buffer[0] = REG_ACTR; // REG:0x00
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236 buffer[1] = MODE_Standby; // Standby
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237 buffer[2] = MODE_WriteOTPBuf; // WriteOTPBuf
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238 buffer[3] = MODE_Standby; // Standby
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240 /* 7. Activation mode */
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241 buffer[0] = REG_ACTR;
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242 buffer[1] = MODE_Active;
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243 sensor_tx_data(client, buffer, 2);
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244 printk("\n dmard10 gsensor _reset SUCCESS!!\n");
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248 /****************operate according to sensor chip:start************/
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250 static int sensor_active(struct i2c_client *client, int enable, int rate)
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252 struct sensor_private_data *sensor =
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253 (struct sensor_private_data *) i2c_get_clientdata(client);
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256 gsensor_reset(client);
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257 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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258 //register setting according to chip datasheet
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261 status = DMARD10_ENABLE; //dmard10
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262 sensor->ops->ctrl_data |= status;
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266 status = ~DMARD10_ENABLE; //dmard10
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267 sensor->ops->ctrl_data &= status;
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270 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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271 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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273 printk("%s:fail to active sensor\n",__func__);
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279 static int sensor_init(struct i2c_client *client)
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281 struct sensor_private_data *sensor =
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282 (struct sensor_private_data *) i2c_get_clientdata(client);
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285 result = sensor->ops->active(client,0,0);
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288 printk("%s:line=%d,error\n",__func__,__LINE__);
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292 sensor->status_cur = SENSOR_OFF;
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294 DBG("%s:DMARD10_REG_TILT=0x%x\n",__func__,sensor_read_reg(client, DMARD10_REG_TILT));
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296 result = sensor_write_reg(client, DMARD10_REG_SR, (0x01<<5)| 0x02); //32 Samples/Second Active and Auto-Sleep Mode
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299 printk("%s:line=%d,error\n",__func__,__LINE__);
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303 if(sensor->pdata->irq_enable) //open interrupt
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305 result = sensor_write_reg(client, DMARD10_REG_INTSU, 1<<4);//enable int,GINT=1
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308 printk("%s:line=%d,error\n",__func__,__LINE__);
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313 sensor->ops->ctrl_data = 1<<6; //Interrupt output INT is push-pull
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314 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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317 printk("%s:line=%d,error\n",__func__,__LINE__);
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322 memset(&axis_average, 0, sizeof(struct sensor_axis_average));
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328 static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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333 result = ((int)high_byte << 8)|((int)low_byte);
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335 if (result < DMARD10_BOUNDARY){
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336 result = result* DMARD10_GRAVITY_STEP;
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338 result = ~( ((~result & (0x7fff>>(16-DMARD10_PRECISION)) ) + 1)* DMARD10_GRAVITY_STEP) + 1;
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345 static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
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347 struct sensor_private_data *sensor =
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348 (struct sensor_private_data *) i2c_get_clientdata(client);
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350 /* Report acceleration sensor information */
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351 input_report_abs(sensor->input_dev, ABS_X, axis->x);
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352 input_report_abs(sensor->input_dev, ABS_Y, axis->y);
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353 input_report_abs(sensor->input_dev, ABS_Z, axis->z);
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354 input_sync(sensor->input_dev);
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355 DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
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359 #define DMARD10_COUNT_AVERAGE 2
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360 #define GSENSOR_MIN 2
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361 static int sensor_report_value(struct i2c_client *client)
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363 struct sensor_private_data *sensor =
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364 (struct sensor_private_data *) i2c_get_clientdata(client);
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365 struct sensor_platform_data *pdata = sensor->pdata;
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368 struct sensor_axis axis;
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369 char buffer[8] = {0};
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372 if(sensor->ops->read_len < 3) //sensor->ops->read_len = 3
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374 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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378 memset(buffer, 0, 8);
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379 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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381 *buffer = sensor->ops->read_reg;
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382 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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387 //this gsensor need 6 bytes buffer
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388 x = sensor_convert_data(sensor->client, buffer[3], buffer[2]); //buffer[1]:high bit
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389 y = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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390 z = sensor_convert_data(sensor->client, buffer[7], buffer[6]);
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392 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
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393 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
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394 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
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397 axis_average.x_average += axis.x;
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398 axis_average.y_average += axis.y;
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399 axis_average.z_average += axis.z;
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400 axis_average.count++;
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402 if(axis_average.count >= DMARD10_COUNT_AVERAGE)
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404 axis.x = axis_average.x_average / axis_average.count;
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405 axis.y = axis_average.y_average / axis_average.count;
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406 axis.z = axis_average.z_average / axis_average.count;
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408 DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
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410 memset(&axis_average, 0, sizeof(struct sensor_axis_average));
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412 //Report event only while value is changed to save some power
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413 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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415 gsensor_report_value(client, &axis);
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417 /* »¥³âµØ»º´æÊý¾Ý. */
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418 mutex_lock(&(sensor->data_mutex) );
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419 sensor->axis = axis;
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420 mutex_unlock(&(sensor->data_mutex) );
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424 if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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427 value = sensor_read_reg(client, sensor->ops->int_status_reg);
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428 DBG("%s:sensor int status :0x%x\n",__func__,value);
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435 struct sensor_operate gsensor_dmard10_ops = {
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436 .name = "gs_dmard10",
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437 .type = SENSOR_TYPE_ACCEL, //sensor type and it should be correct
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438 .id_i2c = ACCEL_ID_DMARD10, //i2c id number
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439 .read_reg = DMARD10_REG_X_OUT, //read data
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440 .read_len = 8, //data length
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441 .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
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442 .id_data = SENSOR_UNKNOW_DATA, //device id
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443 .precision = DMARD10_PRECISION, //12 bit
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444 .ctrl_reg = DMARD10_REG_MODE, //enable or disable
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445 .int_status_reg = SENSOR_UNKNOW_DATA, //intterupt status register
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446 .range = {-DMARD10_RANGE,DMARD10_RANGE}, //range
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447 .trig = IRQF_TRIGGER_LOW|IRQF_ONESHOT,
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448 .active = sensor_active,
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449 .init = sensor_init,
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450 .report = sensor_report_value,
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453 /****************operate according to sensor chip:end************/
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455 //function name should not be changed
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456 static struct sensor_operate *gsensor_get_ops(void)
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458 return &gsensor_dmard10_ops;
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462 static int __init gsensor_dmard10_init(void)
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464 struct sensor_operate *ops = gsensor_get_ops();
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466 int type = ops->type;
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467 result = sensor_register_slave(type, NULL, NULL, gsensor_get_ops);
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471 static void __exit gsensor_dmard10_exit(void)
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473 struct sensor_operate *ops = gsensor_get_ops();
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474 int type = ops->type;
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475 sensor_unregister_slave(type, NULL, NULL, gsensor_get_ops);
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479 module_init(gsensor_dmard10_init);
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480 module_exit(gsensor_dmard10_exit);
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