1 /* drivers/input/sensors/access/kxtik.c
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3 * Copyright (C) 2012-2015 ROCKCHIP.
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4 * Author: luowei <lw@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 <mach/gpio.h>
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29 #include <mach/board.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 CONFIG_REG (0x00)
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37 #define TIM_CTL_REG (0x01)
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38 #define ALS_CTL_REG (0x02)
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39 #define INT_STATUS_REG (0x03)
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40 #define PS_CTL_REG (0x04)
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41 #define PS_ALS_DATA_REG (0x05)
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42 #define ALS_WINDOWS_REG (0x08)
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44 //enable bit[ 0-1], in register CONFIG_REG
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45 #define ONLY_ALS_EN (0x00)
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46 #define ONLY_PROX_EN (0x01)
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47 #define ALL_PROX_ALS_EN (0x02)
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48 #define ALL_IDLE (0x03)
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50 #define POWER_MODE_MASK (0x0C)
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51 #define POWER_UP_MODE (0x00)
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52 #define POWER_DOWN_MODE (0x08)
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53 #define POWER_RESET_MODE (0x0C)
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55 static int sensor_power_updown(struct i2c_client *client, int on)
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64 value = sensor_read_reg(client, CONFIG_REG);
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65 value &= ~POWER_MODE_MASK;
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66 value |= POWER_DOWN_MODE;
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67 result = sensor_write_reg(client, CONFIG_REG, value);
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73 value = sensor_read_reg(client, CONFIG_REG);
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74 value &= ~POWER_MODE_MASK;
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75 value |= POWER_UP_MODE;
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76 result = sensor_write_reg(client, CONFIG_REG, value);
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86 printk("%s:set %d times",__func__,i);
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91 /****************operate according to sensor chip:start************/
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93 static int sensor_active(struct i2c_client *client, int enable, int rate)
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95 struct sensor_private_data *sensor =
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96 (struct sensor_private_data *) i2c_get_clientdata(client);
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101 sensor_power_updown(client, 1);
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103 value = sensor_read_reg(client, sensor->ops->ctrl_reg);
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105 //register setting according to chip datasheet
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108 if( (value & 0x03) == ONLY_PROX_EN )
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111 value |= ALL_PROX_ALS_EN;
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113 else if((value & 0x03) == ALL_IDLE )
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116 value |= ONLY_ALS_EN;
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122 if( (value & 0x03) == ONLY_ALS_EN )
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127 else if((value & 0x03) == ALL_PROX_ALS_EN )
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130 value |= ONLY_PROX_EN;
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135 sensor->ops->ctrl_data = value;
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137 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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138 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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140 printk("%s:fail to active sensor\n",__func__);
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147 static int sensor_init(struct i2c_client *client)
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149 struct sensor_private_data *sensor =
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150 (struct sensor_private_data *) i2c_get_clientdata(client);
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154 sensor_power_updown(client, 0);
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156 result = sensor->ops->active(client,0,0);
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159 printk("%s:line=%d,error\n",__func__,__LINE__);
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163 sensor->status_cur = SENSOR_OFF;
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165 value = 0x41;//The ADC effective resolution = 9; Low lux threshold level = 1;
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166 //value = 0x69; //The ADC effective resolution = 17; Low lux threshold level = 9;
167 result = sensor_write_reg(client, ALS_CTL_REG, value);
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170 printk("%s:line=%d,error\n",__func__,__LINE__);
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174 //value = 0x04;//0x01-0x0f; 17%->93.5% if value = 0x04,then Compensate Loss 52%
175 value = 0x02;//0x01-0x0f; 17%->93.5% if value = 0x02,then Compensate Loss 31%
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176 result = sensor_write_reg(client, ALS_WINDOWS_REG, value);
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179 printk("%s:line=%d,error\n",__func__,__LINE__);
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187 static int light_report_value(struct input_dev *input, int data)
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189 unsigned char index = 0;
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191 index = 0;goto report;
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193 else if(data <= 2){
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194 index = 1;goto report;
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196 else if(data <= 4){
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197 index = 2;goto report;
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199 else if(data <= 8){
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200 index = 3;goto report;
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202 else if(data <= 14){
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203 index = 4;goto report;
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205 else if(data <= 20){
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206 index = 5;goto report;
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208 else if(data <= 26){
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209 index = 6;goto report;
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212 index = 7;goto report;
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216 input_report_abs(input, ABS_MISC, index);
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223 static int sensor_report_value(struct i2c_client *client)
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225 struct sensor_private_data *sensor =
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226 (struct sensor_private_data *) i2c_get_clientdata(client);
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231 if(sensor->pdata->irq_enable)
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233 if(sensor->ops->int_status_reg)
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235 value = sensor_read_reg(client, sensor->ops->int_status_reg);
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240 value = sensor_read_reg(client, sensor->ops->read_reg);
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241 index = light_report_value(sensor->input_dev, value&0x3f); // bit0-5 is ls data;
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243 DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,index);
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248 struct sensor_operate light_al3006_ops = {
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249 .name = "ls_al3006",
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250 .type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct
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251 .id_i2c = LIGHT_ID_AL3006, //i2c id number
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252 .read_reg = PS_ALS_DATA_REG, //read data
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253 .read_len = 1, //data length
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254 .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
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255 .id_data = SENSOR_UNKNOW_DATA, //device id
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256 .precision = 8, //8 bits
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257 .ctrl_reg = CONFIG_REG, //enable or disable
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258 .int_status_reg = INT_STATUS_REG, //intterupt status register
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259 .range = {100,65535}, //range
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260 .brightness ={10,255}, // brightness
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261 .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
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262 .active = sensor_active,
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263 .init = sensor_init,
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264 .report = sensor_report_value,
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267 /****************operate according to sensor chip:end************/
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269 //function name should not be changed
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270 static struct sensor_operate *light_get_ops(void)
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272 return &light_al3006_ops;
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276 static int __init light_al3006_init(void)
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278 struct sensor_operate *ops = light_get_ops();
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280 int type = ops->type;
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281 result = sensor_register_slave(type, NULL, NULL, light_get_ops);
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285 static void __exit light_al3006_exit(void)
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287 struct sensor_operate *ops = light_get_ops();
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288 int type = ops->type;
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289 sensor_unregister_slave(type, NULL, NULL, light_get_ops);
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293 module_init(light_al3006_init);
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294 module_exit(light_al3006_exit);
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