1597 lines
39 KiB
C
1597 lines
39 KiB
C
/******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
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*
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* File Name : lis3dh_acc.c
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* Authors : MSH - Motion Mems BU - Application Team
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* : Matteo Dameno (matteo.dameno@st.com)
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* : Carmine Iascone (carmine.iascone@st.com)
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* : Samuel Huo (samuel.huo@st.com)
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* Version : V.1.1.0
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* Date : 07/10/2012
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* Description : LIS3DH accelerometer sensor driver
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*
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*******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* THE PRESENT SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES
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* OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, FOR THE SOLE
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* PURPOSE TO SUPPORT YOUR APPLICATION DEVELOPMENT.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* THIS SOFTWARE IS SPECIFICALLY DESIGNED FOR EXCLUSIVE USE WITH ST PARTS.
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*
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******************************************************************************
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Revision 1.0.0 05/11/09
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First Release;
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Revision 1.0.3 22/01/2010
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Linux K&R Compliant Release;
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Revision 1.0.5 16/08/2010
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modified _get_acceleration_data function;
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modified _update_odr function;
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manages 2 interrupts;
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Revision 1.0.6 15/11/2010
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supports sysfs;
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no more support for ioctl;
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Revision 1.0.7 26/11/2010
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checks for availability of interrupts pins
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correction on FUZZ and FLAT values;
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Revision 1.0.8 2010/Apr/01
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corrects a bug in interrupt pin management in 1.0.7
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Revision 1.0.9 07/25/2011
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Romove several unused functions,add 5ms delay in init,change sysfs attributes.
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Revision 1.1.0 07/10/2012
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To replace some deprecated functions for 3.4 kernel;
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To pass the checkpatch's formatting requirement;
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To add regulator request;
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******************************************************************************/
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/uaccess.h>
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#include <linux/workqueue.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/pm.h>
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#include <linux/input/lis3dh.h>
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#include <linux/module.h>
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#include <linux/regulator/consumer.h>
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#define DEBUG 1
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#define G_MAX 16000
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#define SENSITIVITY_2G 1 /** mg/LSB */
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#define SENSITIVITY_4G 2 /** mg/LSB */
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#define SENSITIVITY_8G 4 /** mg/LSB */
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#define SENSITIVITY_16G 12 /** mg/LSB */
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/* Accelerometer Sensor Operating Mode */
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#define LIS3DH_ACC_ENABLE 0x01
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#define LIS3DH_ACC_DISABLE 0x00
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#define HIGH_RESOLUTION 0x08
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#define AXISDATA_REG 0x28
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#define WHOAMI_LIS3DH_ACC 0x33 /* Expected content for WAI */
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/* CONTROL REGISTERS */
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#define WHO_AM_I 0x0F /* WhoAmI register */
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#define TEMP_CFG_REG 0x1F /* temper sens control reg */
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/* ctrl 1: ODR3 ODR2 ODR ODR0 LPen Zenable Yenable Zenable */
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#define CTRL_REG1 0x20 /* control reg 1 */
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#define CTRL_REG2 0x21 /* control reg 2 */
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#define CTRL_REG3 0x22 /* control reg 3 */
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#define CTRL_REG4 0x23 /* control reg 4 */
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#define CTRL_REG5 0x24 /* control reg 5 */
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#define CTRL_REG6 0x25 /* control reg 6 */
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#define FIFO_CTRL_REG 0x2E /* FiFo control reg */
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#define INT_CFG1 0x30 /* interrupt 1 config */
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#define INT_SRC1 0x31 /* interrupt 1 source */
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#define INT_THS1 0x32 /* interrupt 1 threshold */
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#define INT_DUR1 0x33 /* interrupt 1 duration */
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#define TT_CFG 0x38 /* tap config */
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#define TT_SRC 0x39 /* tap source */
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#define TT_THS 0x3A /* tap threshold */
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#define TT_LIM 0x3B /* tap time limit */
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#define TT_TLAT 0x3C /* tap time latency */
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#define TT_TW 0x3D /* tap time window */
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/* end CONTROL REGISTRES */
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#define ENABLE_HIGH_RESOLUTION 1
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#define LIS3DH_ACC_PM_OFF 0x00
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#define LIS3DH_ACC_ENABLE_ALL_AXES 0x07
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#define PMODE_MASK 0x08
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#define ODR_MASK 0XF0
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#define ODR1 0x10 /* 1Hz output data rate */
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#define ODR10 0x20 /* 10Hz output data rate */
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#define ODR25 0x30 /* 25Hz output data rate */
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#define ODR50 0x40 /* 50Hz output data rate */
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#define ODR100 0x50 /* 100Hz output data rate */
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#define ODR200 0x60 /* 200Hz output data rate */
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#define ODR400 0x70 /* 400Hz output data rate */
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#define ODR1250 0x90 /* 1250Hz output data rate */
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#define IA 0x40
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#define ZH 0x20
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#define ZL 0x10
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#define YH 0x08
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#define YL 0x04
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#define XH 0x02
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#define XL 0x01
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/* */
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/* CTRL REG BITS*/
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#define CTRL_REG3_I1_AOI1 0x40
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#define CTRL_REG6_I2_TAPEN 0x80
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#define CTRL_REG6_HLACTIVE 0x02
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/* */
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#define NO_MASK 0xFF
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#define INT1_DURATION_MASK 0x7F
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#define INT1_THRESHOLD_MASK 0x7F
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#define TAP_CFG_MASK 0x3F
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#define TAP_THS_MASK 0x7F
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#define TAP_TLIM_MASK 0x7F
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#define TAP_TLAT_MASK NO_MASK
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#define TAP_TW_MASK NO_MASK
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/* TAP_SOURCE_REG BIT */
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#define DTAP 0x20
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#define STAP 0x10
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#define SIGNTAP 0x08
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#define ZTAP 0x04
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#define YTAP 0x02
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#define XTAZ 0x01
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#define FUZZ 0
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#define FLAT 0
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#define I2C_RETRY_DELAY 5
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#define I2C_RETRIES 5
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#define I2C_AUTO_INCREMENT 0x80
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/* RESUME STATE INDICES */
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#define RES_CTRL_REG1 0
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#define RES_CTRL_REG2 1
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#define RES_CTRL_REG3 2
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#define RES_CTRL_REG4 3
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#define RES_CTRL_REG5 4
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#define RES_CTRL_REG6 5
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#define RES_INT_CFG1 6
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#define RES_INT_THS1 7
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#define RES_INT_DUR1 8
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#define RES_TT_CFG 9
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#define RES_TT_THS 10
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#define RES_TT_LIM 11
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#define RES_TT_TLAT 12
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#define RES_TT_TW 13
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#define RES_TEMP_CFG_REG 14
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#define RES_REFERENCE_REG 15
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#define RES_FIFO_CTRL_REG 16
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#define RESUME_ENTRIES 17
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/* end RESUME STATE INDICES */
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struct {
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unsigned int cutoff_ms;
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unsigned int mask;
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} lis3dh_acc_odr_table[] = {
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{ 1, ODR1250 },
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{ 3, ODR400 },
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{ 5, ODR200 },
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{ 10, ODR100 },
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{ 20, ODR50 },
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{ 40, ODR25 },
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{ 100, ODR10 },
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{ 1000, ODR1 },
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};
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struct lis3dh_acc_data {
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struct i2c_client *client;
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struct lis3dh_acc_platform_data *pdata;
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struct mutex lock;
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struct delayed_work input_work;
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struct input_dev *input_dev;
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int hw_initialized;
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/* hw_working=-1 means not tested yet */
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int hw_working;
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atomic_t enabled;
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int on_before_suspend;
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u8 sensitivity;
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u8 resume_state[RESUME_ENTRIES];
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int irq1;
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struct work_struct irq1_work;
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struct workqueue_struct *irq1_work_queue;
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int irq2;
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struct work_struct irq2_work;
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struct workqueue_struct *irq2_work_queue;
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#ifdef DEBUG
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u8 reg_addr;
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#endif
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};
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struct sensor_regulator {
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struct regulator *vreg;
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const char *name;
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u32 min_uV;
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u32 max_uV;
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};
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struct sensor_regulator lis3dh_acc_vreg[] = {
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{NULL, "vdd", 1700000, 3600000},
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{NULL, "vddio", 1700000, 3600000},
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};
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static int lis3dh_acc_config_regulator(struct lis3dh_acc_data *acc, bool on)
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{
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int rc = 0, i;
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int num_reg = sizeof(lis3dh_acc_vreg) / sizeof(struct sensor_regulator);
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if (on) {
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for (i = 0; i < num_reg; i++) {
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lis3dh_acc_vreg[i].vreg =
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regulator_get(&acc->client->dev,
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lis3dh_acc_vreg[i].name);
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if (IS_ERR(lis3dh_acc_vreg[i].vreg)) {
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rc = PTR_ERR(lis3dh_acc_vreg[i].vreg);
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pr_err("%s:regulator get failed rc=%d\n",
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__func__, rc);
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lis3dh_acc_vreg[i].vreg = NULL;
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goto error_vdd;
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}
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if (regulator_count_voltages(
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lis3dh_acc_vreg[i].vreg) > 0) {
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rc = regulator_set_voltage(
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lis3dh_acc_vreg[i].vreg,
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lis3dh_acc_vreg[i].min_uV,
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lis3dh_acc_vreg[i].max_uV);
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if (rc) {
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pr_err("%s: set voltage failed rc=%d\n",
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__func__, rc);
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regulator_put(lis3dh_acc_vreg[i].vreg);
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lis3dh_acc_vreg[i].vreg = NULL;
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goto error_vdd;
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}
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}
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rc = regulator_enable(lis3dh_acc_vreg[i].vreg);
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if (rc) {
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pr_err("%s: regulator_enable failed rc =%d\n",
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__func__, rc);
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if (regulator_count_voltages(
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lis3dh_acc_vreg[i].vreg) > 0) {
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regulator_set_voltage(
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lis3dh_acc_vreg[i].vreg, 0,
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lis3dh_acc_vreg[i].max_uV);
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}
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regulator_put(lis3dh_acc_vreg[i].vreg);
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lis3dh_acc_vreg[i].vreg = NULL;
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goto error_vdd;
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}
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}
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return rc;
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} else {
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i = num_reg;
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}
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error_vdd:
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while (--i >= 0) {
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if (!IS_ERR_OR_NULL(lis3dh_acc_vreg[i].vreg)) {
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if (regulator_count_voltages(
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lis3dh_acc_vreg[i].vreg) > 0) {
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regulator_set_voltage(lis3dh_acc_vreg[i].vreg,
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0, lis3dh_acc_vreg[i].max_uV);
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}
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regulator_disable(lis3dh_acc_vreg[i].vreg);
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regulator_put(lis3dh_acc_vreg[i].vreg);
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lis3dh_acc_vreg[i].vreg = NULL;
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}
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}
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return rc;
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}
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static int lis3dh_acc_i2c_read(struct lis3dh_acc_data *acc,
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u8 *buf, int len)
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{
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int err;
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int tries = 0;
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struct i2c_msg msgs[] = {
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{
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.addr = acc->client->addr,
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.flags = acc->client->flags & I2C_M_TEN,
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.len = 1,
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.buf = buf,
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},
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{
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.addr = acc->client->addr,
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.flags = (acc->client->flags & I2C_M_TEN) | I2C_M_RD,
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.len = len,
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.buf = buf,
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},
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};
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do {
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err = i2c_transfer(acc->client->adapter, msgs, 2);
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if (err != 2)
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msleep_interruptible(I2C_RETRY_DELAY);
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} while ((err != 2) && (++tries < I2C_RETRIES));
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if (err != 2) {
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dev_err(&acc->client->dev, "read transfer error\n");
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err = -EIO;
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} else {
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err = 0;
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}
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return err;
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}
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static int lis3dh_acc_i2c_write(struct lis3dh_acc_data *acc, u8 *buf, int len)
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{
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int err;
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int tries = 0;
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struct i2c_msg msgs[] = {
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{
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.addr = acc->client->addr,
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.flags = acc->client->flags & I2C_M_TEN,
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.len = len + 1,
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.buf = buf,
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},
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};
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do {
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err = i2c_transfer(acc->client->adapter, msgs, 1);
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if (err != 1)
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msleep_interruptible(I2C_RETRY_DELAY);
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} while ((err != 1) && (++tries < I2C_RETRIES));
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if (err != 1) {
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dev_err(&acc->client->dev, "write transfer error\n");
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err = -EIO;
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} else {
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err = 0;
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}
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return err;
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}
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static int lis3dh_acc_hw_init(struct lis3dh_acc_data *acc)
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{
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int err = -1;
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u8 buf[7];
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printk(KERN_INFO "%s: hw init start\n", LIS3DH_ACC_DEV_NAME);
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buf[0] = WHO_AM_I;
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err = lis3dh_acc_i2c_read(acc, buf, 1);
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if (err < 0) {
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dev_warn(&acc->client->dev,
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"Error reading WHO_AM_I: is device available/working?\n");
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goto err_firstread;
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} else
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acc->hw_working = 1;
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if (buf[0] != WHOAMI_LIS3DH_ACC) {
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dev_err(&acc->client->dev,
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"device unknown. Expected: 0x%x, Replies: 0x%x\n",
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WHOAMI_LIS3DH_ACC, buf[0]);
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err = -1; /* choose the right coded error */
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goto err_unknown_device;
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}
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buf[0] = CTRL_REG1;
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buf[1] = acc->resume_state[RES_CTRL_REG1];
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err = lis3dh_acc_i2c_write(acc, buf, 1);
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if (err < 0)
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goto err_resume_state;
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buf[0] = TEMP_CFG_REG;
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buf[1] = acc->resume_state[RES_TEMP_CFG_REG];
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err = lis3dh_acc_i2c_write(acc, buf, 1);
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if (err < 0)
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goto err_resume_state;
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buf[0] = FIFO_CTRL_REG;
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buf[1] = acc->resume_state[RES_FIFO_CTRL_REG];
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err = lis3dh_acc_i2c_write(acc, buf, 1);
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if (err < 0)
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goto err_resume_state;
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buf[0] = (I2C_AUTO_INCREMENT | TT_THS);
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buf[1] = acc->resume_state[RES_TT_THS];
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buf[2] = acc->resume_state[RES_TT_LIM];
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buf[3] = acc->resume_state[RES_TT_TLAT];
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buf[4] = acc->resume_state[RES_TT_TW];
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err = lis3dh_acc_i2c_write(acc, buf, 4);
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if (err < 0)
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goto err_resume_state;
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buf[0] = TT_CFG;
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buf[1] = acc->resume_state[RES_TT_CFG];
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err = lis3dh_acc_i2c_write(acc, buf, 1);
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if (err < 0)
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goto err_resume_state;
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buf[0] = (I2C_AUTO_INCREMENT | INT_THS1);
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buf[1] = acc->resume_state[RES_INT_THS1];
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buf[2] = acc->resume_state[RES_INT_DUR1];
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err = lis3dh_acc_i2c_write(acc, buf, 2);
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if (err < 0)
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goto err_resume_state;
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buf[0] = INT_CFG1;
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buf[1] = acc->resume_state[RES_INT_CFG1];
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err = lis3dh_acc_i2c_write(acc, buf, 1);
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if (err < 0)
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goto err_resume_state;
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buf[0] = (I2C_AUTO_INCREMENT | CTRL_REG2);
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buf[1] = acc->resume_state[RES_CTRL_REG2];
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buf[2] = acc->resume_state[RES_CTRL_REG3];
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buf[3] = acc->resume_state[RES_CTRL_REG4];
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buf[4] = acc->resume_state[RES_CTRL_REG5];
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buf[5] = acc->resume_state[RES_CTRL_REG6];
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err = lis3dh_acc_i2c_write(acc, buf, 5);
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if (err < 0)
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goto err_resume_state;
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acc->hw_initialized = 1;
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printk(KERN_INFO "%s: hw init done\n", LIS3DH_ACC_DEV_NAME);
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return 0;
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err_firstread:
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acc->hw_working = 0;
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err_unknown_device:
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err_resume_state:
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acc->hw_initialized = 0;
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dev_err(&acc->client->dev, "hw init error 0x%x,0x%x: %d\n", buf[0],
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buf[1], err);
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return err;
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}
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static void lis3dh_acc_device_power_off(struct lis3dh_acc_data *acc)
|
|
{
|
|
int err;
|
|
u8 buf[2] = { CTRL_REG1, LIS3DH_ACC_PM_OFF };
|
|
|
|
err = lis3dh_acc_i2c_write(acc, buf, 1);
|
|
if (err < 0)
|
|
dev_err(&acc->client->dev, "soft power off failed: %d\n", err);
|
|
|
|
if (acc->pdata->gpio_int1)
|
|
disable_irq_nosync(acc->irq1);
|
|
if (acc->pdata->gpio_int2)
|
|
disable_irq_nosync(acc->irq2);
|
|
|
|
lis3dh_acc_config_regulator(acc, false);
|
|
|
|
if (acc->hw_initialized) {
|
|
if (acc->pdata->gpio_int1)
|
|
disable_irq_nosync(acc->irq1);
|
|
if (acc->pdata->gpio_int2)
|
|
disable_irq_nosync(acc->irq2);
|
|
acc->hw_initialized = 0;
|
|
}
|
|
}
|
|
|
|
static int lis3dh_acc_device_power_on(struct lis3dh_acc_data *acc)
|
|
{
|
|
int err = -1;
|
|
|
|
err = lis3dh_acc_config_regulator(acc, true);
|
|
if (err < 0) {
|
|
dev_err(&acc->client->dev,
|
|
"power_on failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if (acc->pdata->gpio_int1 >= 0)
|
|
enable_irq(acc->irq1);
|
|
if (acc->pdata->gpio_int2 >= 0)
|
|
enable_irq(acc->irq2);
|
|
|
|
msleep(20);
|
|
|
|
if (!acc->hw_initialized) {
|
|
err = lis3dh_acc_hw_init(acc);
|
|
if (acc->hw_working == 1 && err < 0) {
|
|
lis3dh_acc_device_power_off(acc);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (acc->hw_initialized) {
|
|
if (acc->pdata->gpio_int1 >= 0)
|
|
enable_irq(acc->irq1);
|
|
if (acc->pdata->gpio_int2 >= 0)
|
|
enable_irq(acc->irq2);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t lis3dh_acc_isr1(int irq, void *dev)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev;
|
|
|
|
disable_irq_nosync(irq);
|
|
queue_work(acc->irq1_work_queue, &acc->irq1_work);
|
|
#ifdef DEBUG
|
|
printk(KERN_INFO "%s: isr1 queued\n", LIS3DH_ACC_DEV_NAME);
|
|
#endif
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t lis3dh_acc_isr2(int irq, void *dev)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev;
|
|
|
|
disable_irq_nosync(irq);
|
|
queue_work(acc->irq2_work_queue, &acc->irq2_work);
|
|
#ifdef DEBUG
|
|
printk(KERN_INFO "%s: isr2 queued\n", LIS3DH_ACC_DEV_NAME);
|
|
#endif
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void lis3dh_acc_irq1_work_func(struct work_struct *work)
|
|
{
|
|
|
|
struct lis3dh_acc_data *acc =
|
|
container_of(work, struct lis3dh_acc_data, irq1_work);
|
|
/* TODO add interrupt service procedure.
|
|
ie:lis3dh_acc_get_int1_source(acc); */
|
|
;
|
|
/* */
|
|
printk(KERN_INFO "%s: IRQ1 triggered\n", LIS3DH_ACC_DEV_NAME);
|
|
goto exit;
|
|
exit:
|
|
enable_irq(acc->irq1);
|
|
}
|
|
|
|
static void lis3dh_acc_irq2_work_func(struct work_struct *work)
|
|
{
|
|
|
|
struct lis3dh_acc_data *acc =
|
|
container_of(work, struct lis3dh_acc_data, irq2_work);
|
|
/* TODO add interrupt service procedure.
|
|
ie:lis3dh_acc_get_tap_source(acc); */
|
|
;
|
|
/* */
|
|
printk(KERN_INFO "%s: IRQ2 triggered\n", LIS3DH_ACC_DEV_NAME);
|
|
goto exit;
|
|
exit:
|
|
enable_irq(acc->irq2);
|
|
}
|
|
|
|
int lis3dh_acc_update_g_range(struct lis3dh_acc_data *acc, u8 new_g_range)
|
|
{
|
|
int err = -1;
|
|
|
|
u8 sensitivity;
|
|
u8 buf[2];
|
|
u8 updated_val;
|
|
u8 init_val;
|
|
u8 new_val;
|
|
u8 mask = LIS3DH_ACC_FS_MASK | HIGH_RESOLUTION;
|
|
|
|
switch (new_g_range) {
|
|
case LIS3DH_ACC_G_2G:
|
|
|
|
sensitivity = SENSITIVITY_2G;
|
|
break;
|
|
case LIS3DH_ACC_G_4G:
|
|
|
|
sensitivity = SENSITIVITY_4G;
|
|
break;
|
|
case LIS3DH_ACC_G_8G:
|
|
|
|
sensitivity = SENSITIVITY_8G;
|
|
break;
|
|
case LIS3DH_ACC_G_16G:
|
|
|
|
sensitivity = SENSITIVITY_16G;
|
|
break;
|
|
default:
|
|
dev_err(&acc->client->dev, "invalid g range requested: %u\n",
|
|
new_g_range);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (atomic_read(&acc->enabled)) {
|
|
/* Updates configuration register 4,
|
|
* which contains g range setting */
|
|
buf[0] = CTRL_REG4;
|
|
err = lis3dh_acc_i2c_read(acc, buf, 1);
|
|
if (err < 0)
|
|
goto error;
|
|
init_val = buf[0];
|
|
acc->resume_state[RES_CTRL_REG4] = init_val;
|
|
new_val = new_g_range | HIGH_RESOLUTION;
|
|
updated_val = ((mask & new_val) | ((~mask) & init_val));
|
|
buf[1] = updated_val;
|
|
buf[0] = CTRL_REG4;
|
|
err = lis3dh_acc_i2c_write(acc, buf, 1);
|
|
if (err < 0)
|
|
goto error;
|
|
acc->resume_state[RES_CTRL_REG4] = updated_val;
|
|
acc->sensitivity = sensitivity;
|
|
}
|
|
|
|
|
|
return err;
|
|
error:
|
|
dev_err(&acc->client->dev, "update g range failed 0x%x,0x%x: %d\n",
|
|
buf[0], buf[1], err);
|
|
|
|
return err;
|
|
}
|
|
|
|
int lis3dh_acc_update_odr(struct lis3dh_acc_data *acc, int poll_interval_ms)
|
|
{
|
|
int err = -1;
|
|
int i;
|
|
u8 config[2];
|
|
|
|
/* Following, looks for the longest possible odr interval scrolling the
|
|
* odr_table vector from the end (shortest interval) backward (longest
|
|
* interval), to support the poll_interval requested by the system.
|
|
* It must be the longest interval lower then the poll interval.*/
|
|
for (i = ARRAY_SIZE(lis3dh_acc_odr_table) - 1; i >= 0; i--) {
|
|
if (lis3dh_acc_odr_table[i].cutoff_ms <= poll_interval_ms)
|
|
break;
|
|
}
|
|
config[1] = lis3dh_acc_odr_table[i].mask;
|
|
|
|
config[1] |= LIS3DH_ACC_ENABLE_ALL_AXES;
|
|
|
|
/* If device is currently enabled, we need to write new
|
|
* configuration out to it */
|
|
if (atomic_read(&acc->enabled)) {
|
|
config[0] = CTRL_REG1;
|
|
err = lis3dh_acc_i2c_write(acc, config, 1);
|
|
if (err < 0)
|
|
goto error;
|
|
acc->resume_state[RES_CTRL_REG1] = config[1];
|
|
}
|
|
|
|
return err;
|
|
|
|
error:
|
|
dev_err(&acc->client->dev, "update odr failed 0x%x,0x%x: %d\n",
|
|
config[0], config[1], err);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
static int lis3dh_acc_register_write(struct lis3dh_acc_data *acc, u8 *buf,
|
|
u8 reg_address, u8 new_value)
|
|
{
|
|
int err = -1;
|
|
|
|
/* Sets configuration register at reg_address
|
|
* NOTE: this is a straight overwrite */
|
|
buf[0] = reg_address;
|
|
buf[1] = new_value;
|
|
err = lis3dh_acc_i2c_write(acc, buf, 1);
|
|
if (err < 0)
|
|
return err;
|
|
return err;
|
|
}
|
|
|
|
static int lis3dh_acc_get_acceleration_data(struct lis3dh_acc_data *acc,
|
|
int *xyz)
|
|
{
|
|
int err = -1;
|
|
/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
|
|
u8 acc_data[6];
|
|
/* x,y,z hardware data */
|
|
s16 hw_d[3] = { 0 };
|
|
|
|
acc_data[0] = (I2C_AUTO_INCREMENT | AXISDATA_REG);
|
|
err = lis3dh_acc_i2c_read(acc, acc_data, 6);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
hw_d[0] = (((s16) ((acc_data[1] << 8) | acc_data[0])) >> 4);
|
|
hw_d[1] = (((s16) ((acc_data[3] << 8) | acc_data[2])) >> 4);
|
|
hw_d[2] = (((s16) ((acc_data[5] << 8) | acc_data[4])) >> 4);
|
|
|
|
hw_d[0] = hw_d[0] * acc->sensitivity;
|
|
hw_d[1] = hw_d[1] * acc->sensitivity;
|
|
hw_d[2] = hw_d[2] * acc->sensitivity;
|
|
|
|
|
|
xyz[0] = ((acc->pdata->negate_x) ? (-hw_d[acc->pdata->axis_map_x])
|
|
: (hw_d[acc->pdata->axis_map_x]));
|
|
xyz[1] = ((acc->pdata->negate_y) ? (-hw_d[acc->pdata->axis_map_y])
|
|
: (hw_d[acc->pdata->axis_map_y]));
|
|
xyz[2] = ((acc->pdata->negate_z) ? (-hw_d[acc->pdata->axis_map_z])
|
|
: (hw_d[acc->pdata->axis_map_z]));
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
printk(KERN_INFO "%s read x=%d, y=%d, z=%d\n",
|
|
LIS3DH_ACC_DEV_NAME, xyz[0], xyz[1], xyz[2]);
|
|
*/
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
static void lis3dh_acc_report_values(struct lis3dh_acc_data *acc,
|
|
int *xyz)
|
|
{
|
|
input_report_abs(acc->input_dev, ABS_X, xyz[0]);
|
|
input_report_abs(acc->input_dev, ABS_Y, xyz[1]);
|
|
input_report_abs(acc->input_dev, ABS_Z, xyz[2]);
|
|
input_sync(acc->input_dev);
|
|
}
|
|
|
|
static int lis3dh_acc_enable(struct lis3dh_acc_data *acc)
|
|
{
|
|
int err;
|
|
|
|
if (!atomic_cmpxchg(&acc->enabled, 0, 1)) {
|
|
err = lis3dh_acc_device_power_on(acc);
|
|
if (err < 0) {
|
|
atomic_set(&acc->enabled, 0);
|
|
return err;
|
|
}
|
|
schedule_delayed_work(&acc->input_work,
|
|
msecs_to_jiffies(acc->pdata->poll_interval));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lis3dh_acc_disable(struct lis3dh_acc_data *acc)
|
|
{
|
|
if (atomic_cmpxchg(&acc->enabled, 1, 0)) {
|
|
cancel_delayed_work_sync(&acc->input_work);
|
|
lis3dh_acc_device_power_off(acc);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static ssize_t read_single_reg(struct device *dev, char *buf, u8 reg)
|
|
{
|
|
ssize_t ret;
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
int err;
|
|
|
|
u8 data = reg;
|
|
err = lis3dh_acc_i2c_read(acc, &data, 1);
|
|
if (err < 0)
|
|
return err;
|
|
ret = snprintf(buf, 4, "0x%02x\n", data);
|
|
return ret;
|
|
|
|
}
|
|
|
|
static int write_reg(struct device *dev, const char *buf, u8 reg,
|
|
u8 mask, int resumeIndex)
|
|
{
|
|
int err = -1;
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
u8 x[2];
|
|
u8 new_val;
|
|
unsigned long val;
|
|
|
|
if (kstrtoul(buf, 16, &val))
|
|
return -EINVAL;
|
|
|
|
new_val = ((u8) val & mask);
|
|
x[0] = reg;
|
|
x[1] = new_val;
|
|
err = lis3dh_acc_register_write(acc, x, reg, new_val);
|
|
if (err < 0)
|
|
return err;
|
|
acc->resume_state[resumeIndex] = new_val;
|
|
return err;
|
|
}
|
|
|
|
static ssize_t attr_get_polling_rate(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int val;
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
mutex_lock(&acc->lock);
|
|
val = acc->pdata->poll_interval;
|
|
mutex_unlock(&acc->lock);
|
|
return snprintf(buf, 8, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t attr_set_polling_rate(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
unsigned long interval_ms;
|
|
|
|
if (kstrtoul(buf, 10, &interval_ms))
|
|
return -EINVAL;
|
|
if (!interval_ms)
|
|
return -EINVAL;
|
|
mutex_lock(&acc->lock);
|
|
acc->pdata->poll_interval = interval_ms;
|
|
lis3dh_acc_update_odr(acc, interval_ms);
|
|
mutex_unlock(&acc->lock);
|
|
return size;
|
|
}
|
|
|
|
static ssize_t attr_get_range(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
char val;
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
char range = 2;
|
|
mutex_lock(&acc->lock);
|
|
val = acc->pdata->g_range ;
|
|
switch (val) {
|
|
case LIS3DH_ACC_G_2G:
|
|
range = 2;
|
|
break;
|
|
case LIS3DH_ACC_G_4G:
|
|
range = 4;
|
|
break;
|
|
case LIS3DH_ACC_G_8G:
|
|
range = 8;
|
|
break;
|
|
case LIS3DH_ACC_G_16G:
|
|
range = 16;
|
|
break;
|
|
}
|
|
mutex_unlock(&acc->lock);
|
|
return snprintf(buf, 4, "%d\n", range);
|
|
}
|
|
|
|
static ssize_t attr_set_range(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
unsigned long val;
|
|
if (kstrtoul(buf, 10, &val))
|
|
return -EINVAL;
|
|
mutex_lock(&acc->lock);
|
|
acc->pdata->g_range = val;
|
|
lis3dh_acc_update_g_range(acc, val);
|
|
mutex_unlock(&acc->lock);
|
|
return size;
|
|
}
|
|
|
|
static ssize_t attr_get_enable(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
int val = atomic_read(&acc->enabled);
|
|
return snprintf(buf, sizeof(val) + 2, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t attr_set_enable(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
unsigned long val;
|
|
|
|
if (kstrtoul(buf, 10, &val))
|
|
return -EINVAL;
|
|
|
|
if (val)
|
|
lis3dh_acc_enable(acc);
|
|
else
|
|
lis3dh_acc_disable(acc);
|
|
|
|
return size;
|
|
}
|
|
|
|
static ssize_t attr_set_intconfig1(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, INT_CFG1, NO_MASK, RES_INT_CFG1);
|
|
}
|
|
|
|
static ssize_t attr_get_intconfig1(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, INT_CFG1);
|
|
}
|
|
|
|
static ssize_t attr_set_duration1(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, INT_DUR1, INT1_DURATION_MASK, RES_INT_DUR1);
|
|
}
|
|
|
|
static ssize_t attr_get_duration1(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, INT_DUR1);
|
|
}
|
|
|
|
static ssize_t attr_set_thresh1(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, INT_THS1, INT1_THRESHOLD_MASK, RES_INT_THS1);
|
|
}
|
|
|
|
static ssize_t attr_get_thresh1(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, INT_THS1);
|
|
}
|
|
|
|
static ssize_t attr_get_source1(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, INT_SRC1);
|
|
}
|
|
|
|
static ssize_t attr_set_click_cfg(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, TT_CFG, TAP_CFG_MASK, RES_TT_CFG);
|
|
}
|
|
|
|
static ssize_t attr_get_click_cfg(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
|
|
return read_single_reg(dev, buf, TT_CFG);
|
|
}
|
|
|
|
static ssize_t attr_get_click_source(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, TT_SRC);
|
|
}
|
|
|
|
static ssize_t attr_set_click_ths(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, TT_THS, TAP_THS_MASK, RES_TT_THS);
|
|
}
|
|
|
|
static ssize_t attr_get_click_ths(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, TT_THS);
|
|
}
|
|
|
|
static ssize_t attr_set_click_tlim(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, TT_LIM, TAP_TLIM_MASK, RES_TT_LIM);
|
|
}
|
|
|
|
static ssize_t attr_get_click_tlim(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, TT_LIM);
|
|
}
|
|
|
|
static ssize_t attr_set_click_tlat(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, TT_TLAT, TAP_TLAT_MASK, RES_TT_TLAT);
|
|
}
|
|
|
|
static ssize_t attr_get_click_tlat(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, TT_TLAT);
|
|
}
|
|
|
|
static ssize_t attr_set_click_tw(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
return write_reg(dev, buf, TT_TLAT, TAP_TW_MASK, RES_TT_TLAT);
|
|
}
|
|
|
|
static ssize_t attr_get_click_tw(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return read_single_reg(dev, buf, TT_TLAT);
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
/* PAY ATTENTION: These DEBUG funtions don't manage resume_state */
|
|
static ssize_t attr_reg_set(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
int rc;
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
u8 x[2];
|
|
unsigned long val;
|
|
|
|
if (kstrtoul(buf, 16, &val))
|
|
return -EINVAL;
|
|
mutex_lock(&acc->lock);
|
|
x[0] = acc->reg_addr;
|
|
mutex_unlock(&acc->lock);
|
|
x[1] = val;
|
|
rc = lis3dh_acc_i2c_write(acc, x, 1);
|
|
/*TODO: error need to be managed */
|
|
return size;
|
|
}
|
|
|
|
static ssize_t attr_reg_get(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ssize_t ret;
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
int rc;
|
|
u8 data;
|
|
|
|
mutex_lock(&acc->lock);
|
|
data = acc->reg_addr;
|
|
mutex_unlock(&acc->lock);
|
|
rc = lis3dh_acc_i2c_read(acc, &data, 1);
|
|
/* TODO: error need to be managed */
|
|
ret = snprintf(buf, 8, "0x%02x\n", data);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t attr_addr_set(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct lis3dh_acc_data *acc = dev_get_drvdata(dev);
|
|
unsigned long val;
|
|
if (kstrtoul(buf, 16, &val))
|
|
return -EINVAL;
|
|
mutex_lock(&acc->lock);
|
|
acc->reg_addr = val;
|
|
mutex_unlock(&acc->lock);
|
|
return size;
|
|
}
|
|
#endif
|
|
|
|
static struct device_attribute attributes[] = {
|
|
|
|
__ATTR(pollrate_ms, 0664, attr_get_polling_rate,
|
|
attr_set_polling_rate),
|
|
__ATTR(range, 0664, attr_get_range, attr_set_range),
|
|
__ATTR(enable, 0664, attr_get_enable, attr_set_enable),
|
|
__ATTR(int1_config, 0664, attr_get_intconfig1, attr_set_intconfig1),
|
|
__ATTR(int1_duration, 0664, attr_get_duration1, attr_set_duration1),
|
|
__ATTR(int1_threshold, 0664, attr_get_thresh1, attr_set_thresh1),
|
|
__ATTR(int1_source, 0444, attr_get_source1, NULL),
|
|
__ATTR(click_config, 0664, attr_get_click_cfg, attr_set_click_cfg),
|
|
__ATTR(click_source, 0444, attr_get_click_source, NULL),
|
|
__ATTR(click_threshold, 0664, attr_get_click_ths, attr_set_click_ths),
|
|
__ATTR(click_timelimit, 0664, attr_get_click_tlim,
|
|
attr_set_click_tlim),
|
|
__ATTR(click_timelatency, 0664, attr_get_click_tlat,
|
|
attr_set_click_tlat),
|
|
__ATTR(click_timewindow, 0664, attr_get_click_tw, attr_set_click_tw),
|
|
|
|
#ifdef DEBUG
|
|
__ATTR(reg_value, 0664, attr_reg_get, attr_reg_set),
|
|
__ATTR(reg_addr, 0220, NULL, attr_addr_set),
|
|
#endif
|
|
};
|
|
|
|
static int create_sysfs_interfaces(struct device *dev)
|
|
{
|
|
int i;
|
|
int err;
|
|
for (i = 0; i < ARRAY_SIZE(attributes); i++) {
|
|
err = device_create_file(dev, attributes + i);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
for ( ; i >= 0; i--)
|
|
device_remove_file(dev, attributes + i);
|
|
dev_err(dev, "%s:Unable to create interface\n", __func__);
|
|
return err;
|
|
}
|
|
|
|
static int remove_sysfs_interfaces(struct device *dev)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(attributes); i++)
|
|
device_remove_file(dev, attributes + i);
|
|
return 0;
|
|
}
|
|
|
|
static void lis3dh_acc_input_work_func(struct work_struct *work)
|
|
{
|
|
struct lis3dh_acc_data *acc;
|
|
|
|
int xyz[3] = { 0 };
|
|
int err;
|
|
|
|
acc = container_of((struct delayed_work *)work,
|
|
struct lis3dh_acc_data, input_work);
|
|
|
|
mutex_lock(&acc->lock);
|
|
err = lis3dh_acc_get_acceleration_data(acc, xyz);
|
|
if (err < 0)
|
|
dev_err(&acc->client->dev, "get_acceleration_data failed\n");
|
|
else
|
|
lis3dh_acc_report_values(acc, xyz);
|
|
|
|
schedule_delayed_work(&acc->input_work, msecs_to_jiffies(
|
|
acc->pdata->poll_interval));
|
|
mutex_unlock(&acc->lock);
|
|
}
|
|
|
|
int lis3dh_acc_input_open(struct input_dev *input)
|
|
{
|
|
struct lis3dh_acc_data *acc = input_get_drvdata(input);
|
|
|
|
return lis3dh_acc_enable(acc);
|
|
}
|
|
|
|
void lis3dh_acc_input_close(struct input_dev *dev)
|
|
{
|
|
struct lis3dh_acc_data *acc = input_get_drvdata(dev);
|
|
|
|
lis3dh_acc_disable(acc);
|
|
}
|
|
|
|
static int lis3dh_acc_validate_pdata(struct lis3dh_acc_data *acc)
|
|
{
|
|
acc->pdata->poll_interval = max(acc->pdata->poll_interval,
|
|
acc->pdata->min_interval);
|
|
|
|
if (acc->pdata->axis_map_x > 2 ||
|
|
acc->pdata->axis_map_y > 2 ||
|
|
acc->pdata->axis_map_z > 2) {
|
|
dev_err(&acc->client->dev,
|
|
"invalid axis_map value x:%u y:%u z%u\n",
|
|
acc->pdata->axis_map_x,
|
|
acc->pdata->axis_map_y, acc->pdata->axis_map_z);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Only allow 0 and 1 for negation boolean flag */
|
|
if (acc->pdata->negate_x > 1 || acc->pdata->negate_y > 1
|
|
|| acc->pdata->negate_z > 1) {
|
|
dev_err(&acc->client->dev,
|
|
"invalid negate value x:%u y:%u z:%u\n",
|
|
acc->pdata->negate_x,
|
|
acc->pdata->negate_y, acc->pdata->negate_z);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Enforce minimum polling interval */
|
|
if (acc->pdata->poll_interval < acc->pdata->min_interval) {
|
|
dev_err(&acc->client->dev, "minimum poll interval violated\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lis3dh_acc_input_init(struct lis3dh_acc_data *acc)
|
|
{
|
|
int err;
|
|
|
|
INIT_DELAYED_WORK(&acc->input_work, lis3dh_acc_input_work_func);
|
|
acc->input_dev = input_allocate_device();
|
|
if (!acc->input_dev) {
|
|
err = -ENOMEM;
|
|
dev_err(&acc->client->dev, "input device allocation failed\n");
|
|
goto err0;
|
|
}
|
|
|
|
acc->input_dev->open = lis3dh_acc_input_open;
|
|
acc->input_dev->close = lis3dh_acc_input_close;
|
|
acc->input_dev->name = LIS3DH_ACC_DEV_NAME;
|
|
acc->input_dev->id.bustype = BUS_I2C;
|
|
acc->input_dev->dev.parent = &acc->client->dev;
|
|
|
|
input_set_drvdata(acc->input_dev, acc);
|
|
|
|
set_bit(EV_ABS, acc->input_dev->evbit);
|
|
/* next is used for interruptA sources data if the case */
|
|
set_bit(ABS_MISC, acc->input_dev->absbit);
|
|
/* next is used for interruptB sources data if the case */
|
|
set_bit(ABS_WHEEL, acc->input_dev->absbit);
|
|
|
|
input_set_abs_params(acc->input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT);
|
|
input_set_abs_params(acc->input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT);
|
|
input_set_abs_params(acc->input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT);
|
|
/* next is used for interruptA sources data if the case */
|
|
input_set_abs_params(acc->input_dev, ABS_MISC, INT_MIN, INT_MAX, 0, 0);
|
|
/* next is used for interruptB sources data if the case */
|
|
input_set_abs_params(acc->input_dev, ABS_WHEEL, INT_MIN, INT_MAX, 0, 0);
|
|
|
|
|
|
err = input_register_device(acc->input_dev);
|
|
if (err) {
|
|
dev_err(&acc->client->dev,
|
|
"unable to register input device %s\n",
|
|
acc->input_dev->name);
|
|
goto err1;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err1:
|
|
input_free_device(acc->input_dev);
|
|
err0:
|
|
return err;
|
|
}
|
|
|
|
static void lis3dh_acc_input_cleanup(struct lis3dh_acc_data *acc)
|
|
{
|
|
input_unregister_device(acc->input_dev);
|
|
input_free_device(acc->input_dev);
|
|
}
|
|
|
|
static int lis3dh_acc_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
|
|
struct lis3dh_acc_data *acc;
|
|
|
|
int err = -1;
|
|
|
|
pr_info("%s: probe start.\n", LIS3DH_ACC_DEV_NAME);
|
|
|
|
if (client->dev.platform_data == NULL) {
|
|
dev_err(&client->dev, "platform data is NULL. exiting.\n");
|
|
err = -ENODEV;
|
|
goto exit_check_functionality_failed;
|
|
}
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
|
dev_err(&client->dev, "client not i2c capable\n");
|
|
err = -ENODEV;
|
|
goto exit_check_functionality_failed;
|
|
}
|
|
|
|
/*
|
|
if (!i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_BYTE |
|
|
I2C_FUNC_SMBUS_BYTE_DATA |
|
|
I2C_FUNC_SMBUS_WORD_DATA)) {
|
|
dev_err(&client->dev, "client not smb-i2c capable:2\n");
|
|
err = -EIO;
|
|
goto exit_check_functionality_failed;
|
|
}
|
|
|
|
|
|
if (!i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_I2C_BLOCK)) {
|
|
dev_err(&client->dev, "client not smb-i2c capable:3\n");
|
|
err = -EIO;
|
|
goto exit_check_functionality_failed;
|
|
}
|
|
*/
|
|
|
|
acc = kzalloc(sizeof(struct lis3dh_acc_data), GFP_KERNEL);
|
|
if (acc == NULL) {
|
|
err = -ENOMEM;
|
|
dev_err(&client->dev,
|
|
"failed to allocate memory for module data: "
|
|
"%d\n", err);
|
|
goto exit_check_functionality_failed;
|
|
}
|
|
|
|
|
|
mutex_init(&acc->lock);
|
|
mutex_lock(&acc->lock);
|
|
|
|
acc->client = client;
|
|
i2c_set_clientdata(client, acc);
|
|
|
|
acc->pdata = kmalloc(sizeof(*acc->pdata), GFP_KERNEL);
|
|
if (acc->pdata == NULL) {
|
|
err = -ENOMEM;
|
|
dev_err(&client->dev,
|
|
"failed to allocate memory for pdata: %d\n",
|
|
err);
|
|
goto err_mutexunlock;
|
|
}
|
|
|
|
memcpy(acc->pdata, client->dev.platform_data, sizeof(*acc->pdata));
|
|
|
|
err = lis3dh_acc_validate_pdata(acc);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "failed to validate platform data\n");
|
|
goto exit_kfree_pdata;
|
|
}
|
|
|
|
|
|
if (acc->pdata->init) {
|
|
err = acc->pdata->init();
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "init failed: %d\n", err);
|
|
goto err_pdata_init;
|
|
}
|
|
}
|
|
|
|
if (acc->pdata->gpio_int1 >= 0) {
|
|
acc->irq1 = gpio_to_irq(acc->pdata->gpio_int1);
|
|
printk(KERN_INFO "%s: %s has set irq1 to irq: %d\n",
|
|
LIS3DH_ACC_DEV_NAME, __func__, acc->irq1);
|
|
printk(KERN_INFO "%s: %s has mapped irq1 on gpio: %d\n",
|
|
LIS3DH_ACC_DEV_NAME, __func__,
|
|
acc->pdata->gpio_int1);
|
|
}
|
|
|
|
if (acc->pdata->gpio_int2 >= 0) {
|
|
acc->irq2 = gpio_to_irq(acc->pdata->gpio_int2);
|
|
printk(KERN_INFO "%s: %s has set irq2 to irq: %d\n",
|
|
LIS3DH_ACC_DEV_NAME, __func__, acc->irq2);
|
|
printk(KERN_INFO "%s: %s has mapped irq2 on gpio: %d\n",
|
|
LIS3DH_ACC_DEV_NAME, __func__,
|
|
acc->pdata->gpio_int2);
|
|
}
|
|
|
|
memset(acc->resume_state, 0, ARRAY_SIZE(acc->resume_state));
|
|
|
|
acc->resume_state[RES_CTRL_REG1] = LIS3DH_ACC_ENABLE_ALL_AXES;
|
|
acc->resume_state[RES_CTRL_REG2] = 0x00;
|
|
acc->resume_state[RES_CTRL_REG3] = 0x00;
|
|
acc->resume_state[RES_CTRL_REG4] = 0x00;
|
|
acc->resume_state[RES_CTRL_REG5] = 0x00;
|
|
acc->resume_state[RES_CTRL_REG6] = 0x00;
|
|
|
|
acc->resume_state[RES_TEMP_CFG_REG] = 0x00;
|
|
acc->resume_state[RES_FIFO_CTRL_REG] = 0x00;
|
|
acc->resume_state[RES_INT_CFG1] = 0x00;
|
|
acc->resume_state[RES_INT_THS1] = 0x00;
|
|
acc->resume_state[RES_INT_DUR1] = 0x00;
|
|
|
|
acc->resume_state[RES_TT_CFG] = 0x00;
|
|
acc->resume_state[RES_TT_THS] = 0x00;
|
|
acc->resume_state[RES_TT_LIM] = 0x00;
|
|
acc->resume_state[RES_TT_TLAT] = 0x00;
|
|
acc->resume_state[RES_TT_TW] = 0x00;
|
|
|
|
err = lis3dh_acc_device_power_on(acc);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "power on failed: %d\n", err);
|
|
goto err_pdata_init;
|
|
}
|
|
|
|
atomic_set(&acc->enabled, 1);
|
|
|
|
err = lis3dh_acc_update_g_range(acc, acc->pdata->g_range);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "update_g_range failed\n");
|
|
goto err_power_off;
|
|
}
|
|
|
|
err = lis3dh_acc_update_odr(acc, acc->pdata->poll_interval);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "update_odr failed\n");
|
|
goto err_power_off;
|
|
}
|
|
|
|
err = lis3dh_acc_input_init(acc);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "input init failed\n");
|
|
goto err_power_off;
|
|
}
|
|
|
|
|
|
err = create_sysfs_interfaces(&client->dev);
|
|
if (err < 0) {
|
|
dev_err(&client->dev,
|
|
"device LIS3DH_ACC_DEV_NAME sysfs register failed\n");
|
|
goto err_input_cleanup;
|
|
}
|
|
|
|
lis3dh_acc_device_power_off(acc);
|
|
|
|
/* As default, do not report information */
|
|
atomic_set(&acc->enabled, 0);
|
|
|
|
if (acc->pdata->gpio_int1 >= 0) {
|
|
INIT_WORK(&acc->irq1_work, lis3dh_acc_irq1_work_func);
|
|
acc->irq1_work_queue =
|
|
create_singlethread_workqueue("lis3dh_acc_wq1");
|
|
if (!acc->irq1_work_queue) {
|
|
err = -ENOMEM;
|
|
dev_err(&client->dev,
|
|
"cannot create work queue1: %d\n", err);
|
|
goto err_remove_sysfs_int;
|
|
}
|
|
err = request_irq(acc->irq1, lis3dh_acc_isr1,
|
|
IRQF_TRIGGER_RISING, "lis3dh_acc_irq1", acc);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "request irq1 failed: %d\n", err);
|
|
goto err_destoyworkqueue1;
|
|
}
|
|
disable_irq_nosync(acc->irq1);
|
|
}
|
|
|
|
if (acc->pdata->gpio_int2 >= 0) {
|
|
INIT_WORK(&acc->irq2_work, lis3dh_acc_irq2_work_func);
|
|
acc->irq2_work_queue =
|
|
create_singlethread_workqueue("lis3dh_acc_wq2");
|
|
if (!acc->irq2_work_queue) {
|
|
err = -ENOMEM;
|
|
dev_err(&client->dev,
|
|
"cannot create work queue2: %d\n", err);
|
|
goto err_free_irq1;
|
|
}
|
|
err = request_irq(acc->irq2, lis3dh_acc_isr2,
|
|
IRQF_TRIGGER_RISING, "lis3dh_acc_irq2", acc);
|
|
if (err < 0) {
|
|
dev_err(&client->dev, "request irq2 failed: %d\n", err);
|
|
goto err_destoyworkqueue2;
|
|
}
|
|
disable_irq_nosync(acc->irq2);
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&acc->lock);
|
|
|
|
dev_info(&client->dev, "%s: probed\n", LIS3DH_ACC_DEV_NAME);
|
|
|
|
return 0;
|
|
|
|
err_destoyworkqueue2:
|
|
if (acc->pdata->gpio_int2 >= 0)
|
|
destroy_workqueue(acc->irq2_work_queue);
|
|
err_free_irq1:
|
|
free_irq(acc->irq1, acc);
|
|
err_destoyworkqueue1:
|
|
if (acc->pdata->gpio_int1 >= 0)
|
|
destroy_workqueue(acc->irq1_work_queue);
|
|
err_remove_sysfs_int:
|
|
remove_sysfs_interfaces(&client->dev);
|
|
err_input_cleanup:
|
|
lis3dh_acc_input_cleanup(acc);
|
|
err_power_off:
|
|
lis3dh_acc_device_power_off(acc);
|
|
err_pdata_init:
|
|
if (acc->pdata->exit)
|
|
acc->pdata->exit();
|
|
exit_kfree_pdata:
|
|
kfree(acc->pdata);
|
|
err_mutexunlock:
|
|
mutex_unlock(&acc->lock);
|
|
kfree(acc);
|
|
exit_check_functionality_failed:
|
|
printk(KERN_ERR "%s: Driver Init failed\n", LIS3DH_ACC_DEV_NAME);
|
|
return err;
|
|
}
|
|
|
|
static int __devexit lis3dh_acc_remove(struct i2c_client *client)
|
|
{
|
|
struct lis3dh_acc_data *acc = i2c_get_clientdata(client);
|
|
|
|
if (acc->pdata->gpio_int1 >= 0) {
|
|
free_irq(acc->irq1, acc);
|
|
gpio_free(acc->pdata->gpio_int1);
|
|
destroy_workqueue(acc->irq1_work_queue);
|
|
}
|
|
|
|
if (acc->pdata->gpio_int2 >= 0) {
|
|
free_irq(acc->irq2, acc);
|
|
gpio_free(acc->pdata->gpio_int2);
|
|
destroy_workqueue(acc->irq2_work_queue);
|
|
}
|
|
|
|
lis3dh_acc_input_cleanup(acc);
|
|
lis3dh_acc_device_power_off(acc);
|
|
remove_sysfs_interfaces(&client->dev);
|
|
|
|
if (acc->pdata->exit)
|
|
acc->pdata->exit();
|
|
kfree(acc->pdata);
|
|
kfree(acc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int lis3dh_acc_resume(struct i2c_client *client)
|
|
{
|
|
struct lis3dh_acc_data *acc = i2c_get_clientdata(client);
|
|
|
|
if (acc->on_before_suspend)
|
|
return lis3dh_acc_enable(acc);
|
|
return 0;
|
|
}
|
|
|
|
static int lis3dh_acc_suspend(struct i2c_client *client, pm_message_t mesg)
|
|
{
|
|
struct lis3dh_acc_data *acc = i2c_get_clientdata(client);
|
|
|
|
acc->on_before_suspend = atomic_read(&acc->enabled);
|
|
return lis3dh_acc_disable(acc);
|
|
}
|
|
#else
|
|
#define lis3dh_acc_suspend NULL
|
|
#define lis3dh_acc_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct i2c_device_id lis3dh_acc_id[]
|
|
= { { LIS3DH_ACC_DEV_NAME, 0 }, { }, };
|
|
|
|
MODULE_DEVICE_TABLE(i2c, lis3dh_acc_id);
|
|
|
|
static struct i2c_driver lis3dh_acc_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = LIS3DH_ACC_DEV_NAME,
|
|
},
|
|
.probe = lis3dh_acc_probe,
|
|
.remove = __devexit_p(lis3dh_acc_remove),
|
|
.suspend = lis3dh_acc_suspend,
|
|
.resume = lis3dh_acc_resume,
|
|
.id_table = lis3dh_acc_id,
|
|
};
|
|
|
|
static int __init lis3dh_acc_init(void)
|
|
{
|
|
printk(KERN_INFO "%s accelerometer driver: init\n",
|
|
LIS3DH_ACC_DEV_NAME);
|
|
return i2c_add_driver(&lis3dh_acc_driver);
|
|
}
|
|
|
|
static void __exit lis3dh_acc_exit(void)
|
|
{
|
|
#ifdef DEBUG
|
|
printk(KERN_INFO "%s accelerometer driver exit\n",
|
|
LIS3DH_ACC_DEV_NAME);
|
|
#endif /* DEBUG */
|
|
i2c_del_driver(&lis3dh_acc_driver);
|
|
return;
|
|
}
|
|
|
|
module_init(lis3dh_acc_init);
|
|
module_exit(lis3dh_acc_exit);
|
|
|
|
MODULE_DESCRIPTION("lis3dh digital accelerometer sysfs driver");
|
|
MODULE_AUTHOR("Matteo Dameno, Carmine Iascone, Samuel Huo, STMicroelectronics");
|
|
MODULE_LICENSE("GPL");
|
|
|