SmartAudio/lichee/linux-4.9/drivers/input/sensor/mma8452.c

731 lines
19 KiB
C
Executable File

/*
* mma8452.c - Linux kernel modules for 3-Axis Orientation/Motion
* Detection Sensor
*
* Copyright (C) 2009-2010 Freescale Semiconductor Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/input-polldev.h>
#include <linux/device.h>
#include "../init-input.h"
//#include <mach/system.h>
//#include <mach/hardware.h>
//#ifdef CONFIG_HAS_EARLYSUSPEND
//#include <linux/earlysuspend.h>
//#endif
#if defined(CONFIG_HAS_EARLYSUSPEND) || defined(CONFIG_PM)
#include <linux/pm.h>
#endif
/*
* Defines
*/
#define assert(expr)\
if (!(expr)) {\
printk(KERN_ERR "Assertion failed! %s,%d,%s,%s\n",\
__FILE__, __LINE__, __func__, #expr);\
}
#define MMA8452_DRV_NAME "mma8452"
#define SENSOR_NAME MMA8452_DRV_NAME
#define MMA8452_I2C_ADDR 0x1C
#define MMA8452_ID 0x2A
#define POLL_INTERVAL_MAX 500
#define POLL_INTERVAL 100
#define INPUT_FUZZ 32
#define INPUT_FLAT 32
#define MODE_CHANGE_DELAY_MS 100
#define MMA8452_I2C_ADDR0 0x1C
#define MMA8452_I2C_ADDR1 0x1D
enum {
DEBUG_INIT = 1U << 0,
DEBUG_CONTROL_INFO = 1U << 1,
DEBUG_DATA_INFO = 1U << 2,
DEBUG_SUSPEND = 1U << 3,
};
static u32 debug_mask = 0;
#define dprintk(level_mask, fmt, arg...) if (unlikely(debug_mask & level_mask)) \
printk(KERN_DEBUG fmt , ## arg)
module_param_named(debug_mask, debug_mask, int, 0644);
/* Addresses to scan */
static const unsigned short normal_i2c[2] = {0x1d,I2C_CLIENT_END};
static const unsigned short i2c_address[2] = {MMA8452_I2C_ADDR0,MMA8452_I2C_ADDR1};
static __u32 twi_id = 0;
static int i2c_num = 0;
static struct sensor_config_info gsensor_info = {
.input_type = GSENSOR_TYPE,
};
#ifdef CONFIG_HAS_EARLYSUSPEND
struct mma8452_data {
struct i2c_client *client;
struct early_suspend early_suspend;
};
static struct mma8452_data *mma8452_data;
#endif
/* register enum for mma8452 registers */
enum {
MMA8452_STATUS = 0x00,
MMA8452_OUT_X_MSB,
MMA8452_OUT_X_LSB,
MMA8452_OUT_Y_MSB,
MMA8452_OUT_Y_LSB,
MMA8452_OUT_Z_MSB,
MMA8452_OUT_Z_LSB,
MMA8452_SYSMOD = 0x0B,
MMA8452_INT_SOURCE,
MMA8452_WHO_AM_I,
MMA8452_XYZ_DATA_CFG,
MMA8452_HP_FILTER_CUTOFF,
MMA8452_PL_STATUS,
MMA8452_PL_CFG,
MMA8452_PL_COUNT,
MMA8452_PL_BF_ZCOMP,
MMA8452_PL_P_L_THS_REG,
MMA8452_FF_MT_CFG,
MMA8452_FF_MT_SRC,
MMA8452_FF_MT_THS,
MMA8452_FF_MT_COUNT,
MMA8452_TRANSIENT_CFG = 0x1D,
MMA8452_TRANSIENT_SRC,
MMA8452_TRANSIENT_THS,
MMA8452_TRANSIENT_COUNT,
MMA8452_PULSE_CFG,
MMA8452_PULSE_SRC,
MMA8452_PULSE_THSX,
MMA8452_PULSE_THSY,
MMA8452_PULSE_THSZ,
MMA8452_PULSE_TMLT,
MMA8452_PULSE_LTCY,
MMA8452_PULSE_WIND,
MMA8452_ASLP_COUNT,
MMA8452_CTRL_REG1,
MMA8452_CTRL_REG2,
MMA8452_CTRL_REG3,
MMA8452_CTRL_REG4,
MMA8452_CTRL_REG5,
MMA8452_OFF_X,
MMA8452_OFF_Y,
MMA8452_OFF_Z,
MMA8452_REG_END,
};
enum {
MODE_2G = 0,
MODE_4G,
MODE_8G,
};
/* mma8452 status */
struct mma8452_status {
u8 mode;
u8 ctl_reg1;
};
static struct mma8452_status mma_status = {
.mode = 0,
.ctl_reg1 = 0
};
static struct input_polled_dev *mma8452_idev;
static struct device *hwmon_dev;
static struct i2c_client *mma8452_i2c_client;
static int enable_id = 0;
static struct mutex enable_mutex;
static struct mutex init_mutex;
static void mma8452_resume_events(struct work_struct *work);
static void mma8452_init_events(struct work_struct *work);
static struct workqueue_struct *mma8452_resume_wq;
static struct workqueue_struct *mma8452_init_wq;
static DECLARE_WORK(mma8452_resume_work, mma8452_resume_events);
static DECLARE_WORK(mma8452_init_work, mma8452_init_events);
/**
* gsensor_detect - Device detection callback for automatic device creation
* return value:
* = 0; success;
* < 0; err
*/
static int gsensor_detect(struct i2c_client *client, struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int ret ;
dprintk(DEBUG_INIT, "%s enter \n", __func__);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
if(twi_id == adapter->nr){
while (i2c_num < 2) {
client->addr = i2c_address[i2c_num++];
pr_info("%s: addr= %x\n",__func__,client->addr);
ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
if ((ret&0x00FF) == MMA8452_ID) {
printk( "%s: mma8452 equipment is detected!\n",__func__);
strlcpy(info->type, SENSOR_NAME, I2C_NAME_SIZE);
return 0;
}
}
pr_info("%s: mma8452 equipment is not found!\n",__func__);
return -ENODEV;
} else {
return -ENODEV;
}
}
static ssize_t mma8452_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long data;
int error;
error = strict_strtoul(buf, 10, &data);
if(error) {
pr_err("%s strict_strtoul error\n", __FUNCTION__);
goto exit;
}
dprintk(DEBUG_CONTROL_INFO, "%s data = %ld \n", __func__, data);
if(data) {
mutex_lock(&init_mutex);
enable_id = 1;
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
mma_status.ctl_reg1 |= 0x01;
error = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(error==0);
mutex_unlock(&init_mutex);
if(!error) {
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->open(mma8452_idev->input);
mutex_unlock(&enable_mutex);
dprintk(DEBUG_CONTROL_INFO, "mma enable setting active \n");
}
} else {
mutex_lock(&init_mutex);
enable_id = 0;
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
error = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
assert(error==0);
mutex_unlock(&init_mutex);
if(!error) {
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->close(mma8452_idev->input);
mutex_unlock(&enable_mutex);
dprintk(DEBUG_CONTROL_INFO, "mma enable setting inactive \n");
}
}
return count;
exit:
return error;
}
static ssize_t mma8452_delay_store(struct device *dev,struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long data;
int error;
error = strict_strtoul(buf, 10, &data);
if (error)
return error;
if (data > POLL_INTERVAL_MAX)
data = POLL_INTERVAL_MAX;
mma8452_idev->poll_interval = data;
return count;
}
static DEVICE_ATTR(enable, 0664,
NULL, mma8452_enable_store);
static DEVICE_ATTR(delay, 0664,
NULL, mma8452_delay_store);
static struct attribute *mma8452_attributes[] = {
&dev_attr_enable.attr,
&dev_attr_delay.attr,
NULL
};
static struct attribute_group mma8452_attribute_group = {
.attrs = mma8452_attributes
};
/***************************************************************
*
* Initialization function
*/
static int mma8452_init_client(struct i2c_client *client)
{
int result;
dprintk(DEBUG_INIT, "mma8452 device init\n");
mutex_lock(&init_mutex);
mma_status.ctl_reg1 = 0x20;
result = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(result==0);
mma_status.mode = MODE_2G;
result = i2c_smbus_write_byte_data(client, MMA8452_XYZ_DATA_CFG, mma_status.mode);
assert(result==0);
mma_status.ctl_reg1 |= 0x01;
result = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(result==0);
mutex_unlock(&init_mutex);
msleep(MODE_CHANGE_DELAY_MS);
dprintk(DEBUG_INIT, "mma8452 device init end\n");
return result;
}
/***************************************************************
*
* read sensor data from mma8452
*
***************************************************************/
static int mma8452_read_data(short *x, short *y, short *z) {
u8 tmp_data[7];
if (i2c_smbus_read_i2c_block_data(mma8452_i2c_client,MMA8452_OUT_X_MSB,7,tmp_data) < 7) {
dev_err(&mma8452_i2c_client->dev, "i2c block read failed\n");
return -3;
}
*x = ((tmp_data[0] << 8) & 0xff00) | tmp_data[1];
*y = ((tmp_data[2] << 8) & 0xff00) | tmp_data[3];
*z = ((tmp_data[4] << 8) & 0xff00) | tmp_data[5];
*x = (short)(*x) >> 4;
*y = (short)(*y) >> 4;
*z = (short)(*z) >> 4;
if (mma_status.mode == MODE_4G){
(*x)=(*x)<<1;
(*y)=(*y)<<1;
(*z)=(*z)<<1;
}
else if (mma_status.mode == MODE_8G){
(*x)=(*x)<<2;
(*y)=(*y)<<2;
(*z)=(*z)<<2;
}
return 0;
}
static void report_abs(void)
{
short x,y,z;
int result;
result = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_STATUS);
if (!(result & 0x08)) {
dprintk(DEBUG_DATA_INFO, "mma8452 check new data\n");
return; /* wait for new data */
}
if (mma8452_read_data(&x,&y,&z) != 0) {
dprintk(DEBUG_DATA_INFO, "mma8452 no data");
return;
}
dprintk(DEBUG_DATA_INFO, "x= 0x%hx, y = 0x%hx, z = 0x%hx\n", x, y, z);
input_report_abs(mma8452_idev->input, ABS_X, x);
input_report_abs(mma8452_idev->input, ABS_Y, y);
input_report_abs(mma8452_idev->input, ABS_Z, z);
input_sync(mma8452_idev->input);
}
static void mma8452_dev_poll(struct input_polled_dev *dev)
{
report_abs();
}
static void mma8452_resume_events (struct work_struct *work)
{
int result;
mutex_lock(&init_mutex);
mma_status.ctl_reg1 = 0x20;
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(result==0);
mma_status.mode = MODE_2G;
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_XYZ_DATA_CFG, mma_status.mode);
assert(result==0);
if (1 == enable_id) {
mma_status.ctl_reg1 |= 0x01;
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(result==0);
}
mutex_unlock(&init_mutex);
msleep(MODE_CHANGE_DELAY_MS);
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->open(mma8452_idev->input);
mutex_unlock(&enable_mutex);
}
#ifdef CONFIG_HAS_EARLYSUSPEND
static void mma8452_early_suspend(struct early_suspend *h)
{
int result;
dprintk(DEBUG_SUSPEND, "mma8452 early suspend");
flush_workqueue(mma8452_resume_wq);
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->close(mma8452_idev->input);
mutex_unlock(&enable_mutex);
mutex_lock(&init_mutex);
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
assert(result==0);
mutex_unlock(&init_mutex);
dprintk(DEBUG_SUSPEND, "mma8452 early suspend end");
return ;
}
static void mma8452_late_resume(struct early_suspend *h) //(struct i2c_client *client)
{
int result;
dprintk(DEBUG_SUSPEND, "mma8452 late resume");
if (NORMAL_STANDBY == standby_type) {
mutex_lock(&init_mutex);
if (1 == enable_id) {
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
mma_status.ctl_reg1 |= 0x01;
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(result==0);
}
mutex_unlock(&init_mutex);
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->open(mma8452_idev->input);
mutex_unlock(&enable_mutex);
} else if (SUPER_STANDBY == standby_type) {
queue_work(mma8452_resume_wq, &mma8452_resume_work);
}
dprintk(DEBUG_SUSPEND, "mma8452 late resume end");
return ;
}
#else
#ifdef CONFIG_PM
static int mma8452_resume(struct i2c_client *client)
{
int result;
dprintk(DEBUG_SUSPEND, "mma8452 resume");
if (NORMAL_STANDBY == standby_type) {
mutex_lock(&init_mutex);
if (1 == enable_id) {
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
mma_status.ctl_reg1 |= 0x01;
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
assert(result==0);
}
mutex_unlock(&init_mutex);
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->open(mma8452_idev->input);
mutex_unlock(&enable_mutex);
} else if (SUPER_STANDBY == standby_type) {
queue_work(mma8452_resume_wq, &mma8452_resume_work);
}
dprintk(DEBUG_SUSPEND, "mma8452 resume end");
return 0;
}
static int mma8452_suspend(struct i2c_client *client, pm_message_t mesg)
{
int result;
dprintk(DEBUG_SUSPEND, "mma8452 suspend");
flush_workqueue(mma8452_resume_wq);
mutex_lock(&enable_mutex);
if (mma8452_idev->input->users)
mma8452_idev->input->close(mma8452_idev->input);
mutex_unlock(&enable_mutex);
mutex_lock(&init_mutex);
if (1 == enable_id) {
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
assert(result==0);
}
mutex_unlock(&init_mutex);
dprintk(DEBUG_SUSPEND, "mma8452 suspend end");
return 0;
}
#endif
#endif
static void mma8452_init_events (struct work_struct *work)
{
mma8452_init_client(mma8452_i2c_client);
}
static int mma8452_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int result;
struct input_dev *idev;
struct i2c_adapter *adapter;
dprintk(DEBUG_INIT, "mma8452 probe i2c address is %d \n",i2c_address[i2c_num-1]);
client->addr =i2c_address[i2c_num-1];
mma8452_i2c_client = client;
adapter = to_i2c_adapter(client->dev.parent);
result = i2c_check_functionality(adapter,
I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA);
assert(result);
mutex_init(&init_mutex);
mutex_init(&enable_mutex);
mma8452_init_wq = create_singlethread_workqueue("mma8452_init");
if (mma8452_init_wq == NULL) {
printk("create mma8452_init_wq fail!\n");
return -ENOMEM;
}
/* Initialize the MMA8452 chip */
queue_work(mma8452_init_wq, &mma8452_init_work);
hwmon_dev = hwmon_device_register(&client->dev);
assert(!(IS_ERR(hwmon_dev)));
dev_info(&client->dev, "build time %s %s\n", __DATE__, __TIME__);
/*input poll device register */
mma8452_idev = input_allocate_polled_device();
if (!mma8452_idev) {
dev_err(&client->dev, "alloc poll device failed!\n");
result = -ENOMEM;
return result;
}
mma8452_idev->poll = mma8452_dev_poll;
mma8452_idev->poll_interval = POLL_INTERVAL;
mma8452_idev->poll_interval_max = POLL_INTERVAL_MAX;
idev = mma8452_idev->input;
idev->name = MMA8452_DRV_NAME;
idev->id.bustype = BUS_I2C;
idev->evbit[0] = BIT_MASK(EV_ABS);
input_set_abs_params(idev, ABS_X, -8192, 8191, INPUT_FUZZ, INPUT_FLAT);
input_set_abs_params(idev, ABS_Y, -8192, 8191, INPUT_FUZZ, INPUT_FLAT);
input_set_abs_params(idev, ABS_Z, -8192, 8191, INPUT_FUZZ, INPUT_FLAT);
result = input_register_polled_device(mma8452_idev);
mma8452_idev->input->close(mma8452_idev->input);
if (result) {
dev_err(&client->dev, "register poll device failed!\n");
return result;
}
result = sysfs_create_group(&mma8452_idev->input->dev.kobj, &mma8452_attribute_group);
mma8452_resume_wq = create_singlethread_workqueue("mma8452_resume");
if (mma8452_resume_wq == NULL) {
printk("create mma8452_resume_wq fail!\n");
return -ENOMEM;
}
#ifdef CONFIG_HAS_EARLYSUSPEND
dprintk(DEBUG_INIT, "==register_early_suspend =\n");
mma8452_data = kzalloc(sizeof(*mma8452_data), GFP_KERNEL);
if (mma8452_data == NULL) {
result = -ENOMEM;
goto err_alloc_data_failed;
}
mma8452_data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 3;
mma8452_data->early_suspend.suspend = mma8452_early_suspend;
mma8452_data->early_suspend.resume = mma8452_late_resume;
register_early_suspend(&mma8452_data->early_suspend);
#endif
dprintk(DEBUG_INIT, "mma8452 probe end\n");
return result;
#ifdef CONFIG_HAS_EARLYSUSPEND
err_alloc_data_failed:
#endif
return result;
}
static int mma8452_remove(struct i2c_client *client)
{
int result;
mutex_lock(&init_mutex);
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(client, MMA8452_CTRL_REG1);
result = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
assert(result==0);
mutex_unlock(&init_mutex);
#ifdef CONFIG_HAS_EARLYSUSPEND
unregister_early_suspend(&mma8452_data->early_suspend);
#endif
cancel_work_sync(&mma8452_resume_work);
destroy_workqueue(mma8452_resume_wq);
sysfs_remove_group(&mma8452_idev->input->dev.kobj, &mma8452_attribute_group);
mma8452_idev->input->close(mma8452_idev->input);
input_unregister_polled_device(mma8452_idev);
input_free_polled_device(mma8452_idev);
hwmon_device_unregister(hwmon_dev);
cancel_work_sync(&mma8452_init_work);
destroy_workqueue(mma8452_init_wq);
i2c_set_clientdata(client, NULL);
return result;
}
static const struct i2c_device_id mma8452_id[] = {
{ MMA8452_DRV_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mma8452_id);
static struct i2c_driver mma8452_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = MMA8452_DRV_NAME,
.owner = THIS_MODULE,
.of_match_table = "allwinner,sun50i-gsensor-para",
},
.probe = mma8452_probe,
.remove = mma8452_remove,
#ifdef CONFIG_HAS_EARLYSUSPEND
#else
#ifdef CONFIG_PM
.suspend = mma8452_suspend,
.resume = mma8452_resume,
#endif
#endif
.id_table = mma8452_id,
.detect = gsensor_detect,
.address_list = normal_i2c,
};
static int __init mma8452_init(void)
{
/* register driver */
int res;
dprintk(DEBUG_INIT, "======%s=========. \n", __func__);
if (input_fetch_sysconfig_para(&(gsensor_info.input_type))) {
printk("%s: err.\n", __func__);
return -1;
} else{
res = input_init_platform_resource(&(gsensor_info.input_type));
if (0 != res){
printk("%s:ctp_ops.init_platform_resource err. \n", __func__);
}
}
twi_id = gsensor_info.twi_id;
dprintk(DEBUG_INIT, "%s i2c twi is %d \n", __func__, twi_id);
input_set_power_enable(&(gsensor_info.input_type),1);
res = i2c_add_driver(&mma8452_driver);
if (res < 0) {
printk(KERN_INFO "add mma8452 i2c driver failed\n");
return -ENODEV;
}
dprintk(DEBUG_INIT, "add mma8452 i2c driver\n");
return (res);
}
static void __exit mma8452_exit(void)
{
dprintk(DEBUG_INIT, "remove mma8452 i2c driver.\n");
i2c_del_driver(&mma8452_driver);
input_set_power_enable(&(gsensor_info.input_type),0);
}
MODULE_AUTHOR("Chen Gang <gang.chen@freescale.com>");
MODULE_DESCRIPTION("MMA8452 3-Axis Orientation/Motion Detection Sensor driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.1");
module_init(mma8452_init);
module_exit(mma8452_exit);