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 ISL29023_REG_ADD_COMMAND1 0x00
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37 #define COMMMAND1_OPMODE_SHIFT 5
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38 #define COMMMAND1_OPMODE_MASK (7 << COMMMAND1_OPMODE_SHIFT)
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39 #define COMMMAND1_OPMODE_POWER_DOWN (0 << COMMMAND1_OPMODE_SHIFT)
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40 #define COMMMAND1_OPMODE_ALS_ONCE (1 << COMMMAND1_OPMODE_SHIFT)
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41 #define COMMMAND1_OPMODE_IR_ONCE (2 << COMMMAND1_OPMODE_SHIFT)
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42 #define COMMMAND1_OPMODE_ALS_CONTINUE (5 << COMMMAND1_OPMODE_SHIFT)
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43 #define COMMMAND1_OPMODE_IR_CONTINUE (6 << COMMMAND1_OPMODE_SHIFT)
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46 #define ISL29023_REG_ADD_COMMANDII 0x01
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47 #define COMMANDII_RESOLUTION_SHIFT 2
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48 #define COMMANDII_RESOLUTION_65536 (0x0 << COMMANDII_RESOLUTION_SHIFT)
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49 #define COMMANDII_RESOLUTION_4096 (0x1 << COMMANDII_RESOLUTION_SHIFT)
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50 #define COMMANDII_RESOLUTION_256 (0x2 << COMMANDII_RESOLUTION_SHIFT)
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51 #define COMMANDII_RESOLUTION_16 (0x3 << COMMANDII_RESOLUTION_SHIFT)
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52 #define COMMANDII_RESOLUTION_MASK (0x3 << COMMANDII_RESOLUTION_SHIFT)
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54 #define COMMANDII_RANGE_SHIFT 0
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55 #define COMMANDII_RANGE_1000 (0x0 << COMMANDII_RANGE_SHIFT)
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56 #define COMMANDII_RANGE_4000 (0x1 << COMMANDII_RANGE_SHIFT)
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57 #define COMMANDII_RANGE_16000 (0x2 << COMMANDII_RANGE_SHIFT)
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58 #define COMMANDII_RANGE_64000 (0x3 << COMMANDII_RANGE_SHIFT)
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59 #define COMMANDII_RANGE_MASK (0x3 << COMMANDII_RANGE_SHIFT)
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62 #define COMMANDII_RANGE_MASK (0x3 << COMMANDII_RANGE_SHIFT)
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64 #define COMMANDII_SCHEME_SHIFT 7
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65 #define COMMANDII_SCHEME_MASK (0x1 << COMMANDII_SCHEME_SHIFT)
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67 #define ISL29023_REG_ADD_DATA_LSB 0x02
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68 #define ISL29023_REG_ADD_DATA_MSB 0x03
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69 #define ISL29023_MAX_REGS ISL29023_REG_ADD_DATA_MSB
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71 #define ISL29023_REG_LT_LSB 0x04
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72 #define ISL29023_REG_LT_MSB 0x05
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73 #define ISL29023_REG_HT_LSB 0x06
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74 #define ISL29023_REG_HT_MSB 0x07
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77 /****************operate according to sensor chip:start************/
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79 static int sensor_active(struct i2c_client *client, int enable, int rate)
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81 struct sensor_private_data *sensor =
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82 (struct sensor_private_data *) i2c_get_clientdata(client);
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86 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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88 //register setting according to chip datasheet
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91 sensor->ops->ctrl_data &= 0x1f;
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92 sensor->ops->ctrl_data |= COMMMAND1_OPMODE_ALS_CONTINUE;
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96 sensor->ops->ctrl_data &= 0x1f;
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97 //sensor->ops->ctrl_data |= COMMMAND1_OPMODE_POWER_DOWN;
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100 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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101 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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103 printk("%s:fail to active sensor\n",__func__);
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106 sensor->ops->report(sensor->client);
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113 static int sensor_init(struct i2c_client *client)
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115 struct sensor_private_data *sensor =
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116 (struct sensor_private_data *) i2c_get_clientdata(client);
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119 result = sensor->ops->active(client,0,0);
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122 printk("%s:line=%d,error\n",__func__,__LINE__);
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126 sensor->status_cur = SENSOR_OFF;
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128 result = sensor_write_reg(client, ISL29023_REG_ADD_COMMANDII, COMMANDII_RANGE_4000 | COMMANDII_RESOLUTION_4096);
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131 printk("%s:line=%d,error\n",__func__,__LINE__);
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139 static int light_report_value(struct input_dev *input, int data)
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141 unsigned char index = 0;
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144 index = 0;goto report;
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146 else if(data <= 3){
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147 index = 2;goto report;
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149 else if(data <= 5){
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150 index = 3;goto report;
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152 else if(data <= 8){
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153 index = 4;goto report;
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155 else if(data <= 11){
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156 index = 5;goto report;
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158 else if(data <= 14){
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159 index = 6;goto report;
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161 else if(data <= 17){
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162 index = 7;goto report;
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165 index = 7;goto report;
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169 input_report_abs(input, ABS_MISC, index);
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176 static int sensor_report_value(struct i2c_client *client)
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178 struct sensor_private_data *sensor =
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179 (struct sensor_private_data *) i2c_get_clientdata(client);
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182 char buffer[2] = {0};
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185 if(sensor->ops->read_len < 2) //sensor->ops->read_len = 2
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187 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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191 memset(buffer, 0, 2);
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193 buffer[0] = sensor->ops->read_reg;
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194 result = sensor_rx_data(client, buffer, sensor->ops->read_len);
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197 printk("%s:line=%d,error\n",__func__,__LINE__);
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201 value = (buffer[1] << 8) | buffer[0];
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204 index = light_report_value(sensor->input_dev, value);
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206 DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,index);
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208 if(sensor->pdata->irq_enable)
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210 if(sensor->ops->int_status_reg)
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212 value = sensor_read_reg(client, sensor->ops->int_status_reg);
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221 struct sensor_operate light_isl29023_ops = {
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222 .name = "ls_isl29023",
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223 .type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct
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224 .id_i2c = LIGHT_ID_ISL29023, //i2c id number
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225 .read_reg = ISL29023_REG_ADD_DATA_LSB, //read data
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226 .read_len = 2, //data length
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227 .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
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228 .id_data = SENSOR_UNKNOW_DATA, //device id
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229 .precision = 16, //8 bits
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230 .ctrl_reg = ISL29023_REG_ADD_COMMAND1, //enable or disable
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231 .int_status_reg = ISL29023_REG_ADD_COMMAND1, //intterupt status register
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232 .range = {100,65535}, //range
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233 .brightness ={10,255}, //brightness
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234 .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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235 .active = sensor_active,
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236 .init = sensor_init,
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237 .report = sensor_report_value,
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240 /****************operate according to sensor chip:end************/
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242 //function name should not be changed
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243 static struct sensor_operate *light_get_ops(void)
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245 return &light_isl29023_ops;
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249 static int __init light_isl29023_init(void)
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251 struct sensor_operate *ops = light_get_ops();
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253 int type = ops->type;
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254 result = sensor_register_slave(type, NULL, NULL, light_get_ops);
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258 static void __exit light_isl29023_exit(void)
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260 struct sensor_operate *ops = light_get_ops();
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261 int type = ops->type;
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262 sensor_unregister_slave(type, NULL, NULL, light_get_ops);
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266 module_init(light_isl29023_init);
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267 module_exit(light_isl29023_exit);
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