/* drivers/input/sensors/access/kxtik.c
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*
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* Copyright (C) 2012-2015 ROCKCHIP.
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* Author: Bruins <xwj@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/miscdevice.h>
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#include <linux/gpio.h>
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#include <linux/uaccess.h>
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#include <asm/atomic.h>
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/workqueue.h>
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#include <linux/freezer.h>
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#include <linux/of_gpio.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/sensor-dev.h>
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#define LSM303D_WHO_AM_I (0x0F)
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/* full scale setting - register & mask */
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#define LSM303D_CTRL_REG0 (0x1F)
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#define LSM303D_CTRL_REG1 (0x20)
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#define LSM303D_CTRL_REG2 (0x21)
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#define LSM303D_CTRL_REG3 (0x22)
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#define LSM303D_CTRL_REG4 (0x23)
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#define LSM303D_CTRL_REG5 (0x24)
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#define LSM303D_CTRL_REG6 (0x25)
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#define LSM303D_CTRL_REG7 (0x26)
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#define LSM303D_STATUS_REG (0x27)
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#define LSM303D_OUT_X_L (0x28)
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#define LSM303D_OUT_X_H (0x29)
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#define LSM303D_OUT_Y_L (0x2a)
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#define LSM303D_OUT_Y_H (0x2b)
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#define LSM303D_OUT_Z_L (0x2c)
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#define LSM303D_OUT_Z_H (0x2d)
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#define LSM303D_FIFO_CTRL_REG (0x2E)
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#define LSM303D_FIFO_SRC_REG (0X2F)
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#define LSM303D_IG_CFG1 (0x30)
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#define LSM303D_IG_SRC1 (0x31)
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#define LSM303D_IG_THS1 (0x32)
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#define LSM303D_IG_DURATION1 (0x33)
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#define LSM303D_IG_CFG2 (0x34)
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#define LSM303D_IG_SRC2 (0x35)
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#define LSM303D_IG_THS2 (0x36)
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#define LSM303D_IG_DURATION2 (0x37)
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#define LSM303D_DEVID (0x49) //chip id
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#define LSM303D_ACC_DISABLE (0x08)
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#define LSM303D_RANGE 32768
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/* LSM303D */
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#define LSM303D_PRECISION 16
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#define LSM303D_BOUNDARY (0x1 << (LSM303D_PRECISION - 1))
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#define LSM303D_GRAVITY_STEP (LSM303D_RANGE / LSM303D_BOUNDARY)
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#define ODR3P25 0x10 /* 3.25Hz output data rate */
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#define ODR6P25 0x20 /* 6.25Hz output data rate */
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#define ODR12P5 0x30 /* 12.5Hz output data rate */
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#define ODR25 0x40 /* 25Hz output data rate */
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#define ODR50 0x50 /* 50Hz output data rate */
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#define ODR100 0x60 /* 100Hz output data rate */
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#define ODR200 0x70 /* 200Hz output data rate */
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#define ODR400 0x80 /* 400Hz output data rate */
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#define ODR800 0x90 /* 800Hz output data rate */
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#define ODR1600 0xA0 /* 1600Hz output data rate */
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struct sensor_reg_data {
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char reg;
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char data;
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};
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/****************operate according to sensor chip:start************/
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static int sensor_active(struct i2c_client *client, int enable, int rate)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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int status = 0;
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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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sensor->ops->ctrl_data |= ODR100; //100HZ,if 0 then power down
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//register setting according to chip datasheet
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if(!enable)
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{
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status = LSM303D_ACC_DISABLE; //lis3dh
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sensor->ops->ctrl_data |= status;
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}
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else
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{
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status = ~LSM303D_ACC_DISABLE; //lis3dh
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sensor->ops->ctrl_data &= status;
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}
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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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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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printk("%s:fail to active sensor\n",__func__);
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return result;
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}
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static int sensor_init(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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int i;
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struct sensor_reg_data reg_data[] =
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{
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{LSM303D_CTRL_REG0,0x00},
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{LSM303D_CTRL_REG1,0x07},
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{LSM303D_CTRL_REG2,0x00},
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{LSM303D_CTRL_REG3,0x00},
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{LSM303D_CTRL_REG4,0x00},
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{LSM303D_CTRL_REG5,0x78}, //High resolution output mode:11,
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{LSM303D_CTRL_REG6,0x20},
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{LSM303D_CTRL_REG7,0x00},
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{LSM303D_FIFO_CTRL_REG,0x00},
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{LSM303D_IG_CFG1,0xFF}, //6 direction position recognition
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{LSM303D_IG_THS1,0x7F}, //Interrupt 1 threshold
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{LSM303D_IG_DURATION1,0x7F}, //Duration value 0x00->ox7f
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/*
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{LSM303D_CTRL_REG7,0x00},
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{LSM303D_CTRL_REG4,0x08}, //High resolution output mode: 1, Normal mode
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{LSM303D_CTRL_REG6,0x40},
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{LSM303D_FIFO_CTRL_REG,0x00}, //
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{LSM303D_IG_CFG1,0xFF}, //6 direction position recognition
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{LSM303D_IG_THS1,0x7F}, //Interrupt 1 threshold
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{LSM303D_IG_DURATION1,0x7F}, //Duration value 0x00->ox7f
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*/
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};
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result = sensor->ops->active(client,0,0);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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for(i=0;i<(sizeof(reg_data)/sizeof(struct sensor_reg_data));i++)
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{
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result = sensor_write_reg(client, reg_data[i].reg, reg_data[i].data);
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if(result)
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{
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printk("%s:line=%d,i=%d,error\n",__func__,__LINE__,i);
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return result;
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}
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}
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if(sensor->pdata->irq_enable)
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{
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result = sensor_write_reg(client, LSM303D_CTRL_REG3, 0x20);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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i = sensor_read_reg(client,LSM303D_CTRL_REG5);
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result = sensor_write_reg(client, LSM303D_CTRL_REG5, (i|0x01));
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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}
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return result;
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}
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static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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{
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int result;
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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switch (sensor->devid) {
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case LSM303D_DEVID:
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result = ((int)high_byte << 8) | (int)low_byte;
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if (result < LSM303D_BOUNDARY)
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result = result * LSM303D_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - LSM303D_PRECISION))) + 1)
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* LSM303D_GRAVITY_STEP) + 1;
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break;
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default:
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printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
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return -EFAULT;
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}
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return (int)result;
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}
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static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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if (sensor->status_cur == SENSOR_ON) {
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/* Report acceleration sensor information */
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input_report_abs(sensor->input_dev, ABS_X, axis->x);
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input_report_abs(sensor->input_dev, ABS_Y, axis->y);
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input_report_abs(sensor->input_dev, ABS_Z, axis->z);
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input_sync(sensor->input_dev);
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}
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return 0;
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}
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#define GSENSOR_MIN 10
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static int sensor_report_value(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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struct sensor_platform_data *pdata = sensor->pdata;
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int ret = 0;
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int x,y,z;
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struct sensor_axis axis;
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char buffer[6] = {0};
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char value = 0;
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if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
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{
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printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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return -1;
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}
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memset(buffer, 0, 6);
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value = sensor_read_reg(client, LSM303D_STATUS_REG);
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if((value & 0x0f) == 0)
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{
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printk("%s:line=%d,value=0x%x,data is not ready\n",__func__,__LINE__,value);
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return -1;
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}
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/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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do {
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*buffer = sensor->ops->read_reg;
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ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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if (ret < 0)
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return ret;
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} while (0);
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//this gsensor need 6 bytes buffer
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x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
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y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
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z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
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axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
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axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
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gsensor_report_value(client, &axis);
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mutex_lock(&sensor->data_mutex);
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sensor->axis = axis;
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mutex_unlock(&sensor->data_mutex);
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if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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{
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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DBG("%s:sensor int status :0x%x\n",__func__,value);
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}
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return ret;
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}
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static struct sensor_operate gsensor_lsm303d_ops = {
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.name = "lsm303d",
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.type = SENSOR_TYPE_ACCEL,
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.id_i2c = ACCEL_ID_LSM303D,
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.read_reg = (LSM303D_OUT_X_L | 0x80),
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.read_len = 6,
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.id_reg = LSM303D_WHO_AM_I,
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.id_data = LSM303D_DEVID,
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.precision = LSM303D_PRECISION,
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.ctrl_reg = LSM303D_CTRL_REG1,
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.int_status_reg = LSM303D_IG_SRC1,
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.range = {-LSM303D_RANGE, LSM303D_RANGE},
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.trig = (IRQF_TRIGGER_LOW | IRQF_ONESHOT),
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.active = sensor_active,
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.init = sensor_init,
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.report = sensor_report_value,
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};
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/****************operate according to sensor chip:end************/
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static int gsensor_lsm303d_probe(struct i2c_client *client,
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const struct i2c_device_id *devid)
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{
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return sensor_register_device(client, NULL, devid, &gsensor_lsm303d_ops);
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}
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static int gsensor_lsm303d_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gsensor_lsm303d_ops);
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}
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static const struct i2c_device_id gsensor_lsm303d_id[] = {
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{"gs_lsm303d", ACCEL_ID_LSM303D},
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{}
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};
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static struct i2c_driver gsensor_lsm303d_driver = {
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.probe = gsensor_lsm303d_probe,
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.remove = gsensor_lsm303d_remove,
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.shutdown = sensor_shutdown,
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.id_table = gsensor_lsm303d_id,
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.driver = {
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.name = "gsensor_lsm303d",
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#ifdef CONFIG_PM
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.pm = &sensor_pm_ops,
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#endif
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},
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};
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module_i2c_driver(gsensor_lsm303d_driver);
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MODULE_AUTHOR("xwj <xwj@rock-chips.com>");
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MODULE_DESCRIPTION("lsm303d 3-Axis accelerometer driver");
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MODULE_LICENSE("GPL");
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