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Commit 7e804959 authored by Cloud Chen's avatar Cloud Chen Committed by Bingzhe Cai
Browse files

input: sensors: add BOSCH bma2x2 accelerometer driver 



Initial version of BOSCH bma2x2 accelerometer driver.
add new file.

Change-Id: I2343fa5b46ffb00b560d0b25ed93ad91e0d611b9
Signed-off-by: default avatarCloud Chen <Ji.chen@bosch-sensortec.com>
Git-commit: 82e7c6b1cf460aeafe6ccdccc5c35f75ad214ee9
Git-repo: https://github.com/BoschSensortec/Linux_Kernel_Drivers


[bingzhec@codeaurora.org: merging with existing Kconfig and
Makefile, fix recursive dependency error]
Signed-off-by: default avatarBingzhe Cai <bingzhec@codeaurora.org>
parent 11e8434e

drivers/input/misc/Kconfig

+44 −0
Original line number Original line Diff line number Diff line
@@ -766,4 +766,48 @@ config SENSORS_CAPELLA_CM36283 




	  To compile this driver as a module, choose M here: the

	  To compile this driver as a module, choose M here: the

	  module will be called CM36283.

	  module will be called CM36283.



config SENSORS_BMA2X2

	tristate "BMA2x2 acceleration sensor support"

	depends on I2C

	help

	  If you say yes here, you get support for Bosch Sensortec's

	  acceleration sensors BMA255/BMA254/BMA355/BMA250E/BMA222E/BMA280.



config SENSORS_BMA2X2_ENABLE_INT1

	tristate "BMA2X2 acceleration sensor interrupt INT1 support"

	depends on SENSORS_BMA2X2

	help

	 If you say yes here, you get INT1 support for Bosch Sensortec

	 acceleration sensors BMA255/BMA254/BMA355/BMA250E/BMA222E/BMA280.

	 Select it will disable interrupt INT2 support



config SENSORS_BMA2X2_ENABLE_INT2

	tristate "BMA2X2 acceleration sensor interrupt INT2 support"

	depends on SENSORS_BMA2X2 && !SENSORS_BMA2X2_ENABLE_INT1

	help

	 If you say yes here, you get INT2 support for Bosch Sensortec

	 acceleration sensors BMA255/BMA254/BMA355/BMA250E/BMA222E/BMA280.

	 Can only open if you do NOT open interrupt INT1 support



config SIG_MOTION

	tristate "support significant motion sensor function"

	depends on SENSORS_BMA2X2  && ( SENSORS_BMA2X2_ENABLE_INT1 || SENSORS_BMA2X2_ENABLE_INT2)

	help

	 If you say yes here, if you want to support Bosch significant motion sensor function



config DOUBLE_TAP

	tristate "support double tap sensor function"

	depends on SENSORS_BMA2X2  && ( SENSORS_BMA2X2_ENABLE_INT1 || SENSORS_BMA2X2_ENABLE_INT2)

	help

	 If you say yes here, you get support Bosch double tap sensor function



config SENSORS_BMI058

	tristate "BMI058 Sensor Support"

	depends on (SENSORS_BMG || SENSORS_BMA2X2)

	help

	 If you say yes here, you get support for Bosch Sensortec's

	 sensor driver of BMI058.



endif

endif

drivers/input/misc/Makefile

+11 −0
Original line number Original line Diff line number Diff line
@@ -71,3 +71,14 @@ obj-$(CONFIG_SENSORS_MPU6050) += mpu6050.o 
obj-$(CONFIG_SENSORS_AKM8963)		+= akm8963.o

obj-$(CONFIG_SENSORS_AKM8963)		+= akm8963.o

obj-$(CONFIG_SENSORS_AKM09911)		+= akm09911.o

obj-$(CONFIG_SENSORS_AKM09911)		+= akm09911.o

obj-$(CONFIG_SENSORS_LIS3DH)		+= lis3dh_acc.o

obj-$(CONFIG_SENSORS_LIS3DH)		+= lis3dh_acc.o

obj-$(CONFIG_SENSORS_BMA2X2)	+= bstclass.o



obj-$(CONFIG_SENSORS_BMA2X2)	+= bma2x2.o



ifeq ($(CONFIG_SENSORS_BMA2X2_ENABLE_INT1),y)

	EXTRA_CFLAGS += -DBMA2X2_ENABLE_INT1

endif



ifeq ($(CONFIG_BOSCH_BMA2X2_ENABLE_INT2),y)

	EXTRA_CFLAGS += -DBMA2X2_ENABLE_INT2

endif

drivers/input/misc/bma2x2.c

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File added.

File size exceeds preview limit.

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drivers/input/misc/bstclass.c

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+266 −0
Original line number Original line Diff line number Diff line 
/*!

 * @section LICENSE

 * (C) Copyright 2013 Bosch Sensortec GmbH All Rights Reserved

 *

 * This software program is licensed subject to the GNU General

 * Public License (GPL).Version 2,June 1991,

 * available at http://www.fsf.org/copyleft/gpl.html

 *

 * @filename bstclass.c

 * @date     "Wed Feb 19 13:22:52 2014 +0800"

 * @id       "6d7c0bb"

 *

 * @brief

 * The core code of bst device driver

*/

#include <linux/init.h>

#include <linux/types.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/random.h>

#include <linux/sched.h>

#include <linux/seq_file.h>

#include <linux/poll.h>

#include <linux/mutex.h>

#include <linux/rcupdate.h>

#include <linux/compiler.h>

#include <linux/compat.h>

#include "bstclass.h"



static LIST_HEAD(bst_dev_list);



/*

 * bst_mutex protects access to both bst_dev_list and input_handler_list.

 * This also causes bst_[un]register_device and bst_[un]register_handler

 * be mutually exclusive which simplifies locking in drivers implementing

 * input handlers.

 */

static DEFINE_MUTEX(bst_mutex);





static void bst_dev_release(struct device *device)

{

	struct bst_dev *dev = to_bst_dev(device);

	if (NULL != dev)

		kfree(dev);

	module_put(THIS_MODULE);

}





#ifdef CONFIG_PM

static int bst_dev_suspend(struct device *dev)

{

	return 0;

}



static int bst_dev_resume(struct device *dev)

{

	return 0;

}



static const struct dev_pm_ops bst_dev_pm_ops = {

	.suspend    = bst_dev_suspend,

	.resume     = bst_dev_resume,

	.poweroff   = bst_dev_suspend,

	.restore    = bst_dev_resume,

};

#endif /* CONFIG_PM */



static const struct attribute_group *bst_dev_attr_groups[] = {

	NULL

};



static struct device_type bst_dev_type = {

	.groups      = bst_dev_attr_groups,

	.release = bst_dev_release,

#ifdef CONFIG_PM

	.pm      = &bst_dev_pm_ops,

#endif

};







static char *bst_devnode(struct device *dev, mode_t *mode)

{

	return kasprintf(GFP_KERNEL, "%s", dev_name(dev));

}



struct class bst_class = {

	.name        = "bst",

	.owner       = THIS_MODULE,

	.devnode     = bst_devnode,

	.dev_release = bst_dev_release,

};

EXPORT_SYMBOL_GPL(bst_class);



/**

 * bst_allocate_device - allocate memory for new input device

 *

 * Returns prepared struct bst_dev or NULL.

 *

 * NOTE: Use bst_free_device() to free devices that have not been

 * registered; bst_unregister_device() should be used for already

 * registered devices.

 */

struct bst_dev *bst_allocate_device(void)

{

	struct bst_dev *dev;



	dev = kzalloc(sizeof(struct bst_dev), GFP_KERNEL);

	if (dev) {

		dev->dev.type = &bst_dev_type;

		dev->dev.class = &bst_class;

		device_initialize(&dev->dev);

		mutex_init(&dev->mutex);

		INIT_LIST_HEAD(&dev->node);

		__module_get(THIS_MODULE);

	}

	return dev;

}

EXPORT_SYMBOL(bst_allocate_device);







/**

 * bst_free_device - free memory occupied by bst_dev structure

 * @dev: input device to free

 *

 * This function should only be used if bst_register_device()

 * was not called yet or if it failed. Once device was registered

 * use bst_unregister_device() and memory will be freed once last

 * reference to the device is dropped.

 *

 * Device should be allocated by bst_allocate_device().

 *

 * NOTE: If there are references to the input device then memory

 * will not be freed until last reference is dropped.

 */

void bst_free_device(struct bst_dev *dev)

{

	if (dev)

		bst_put_device(dev);

}

EXPORT_SYMBOL(bst_free_device);



/**

 * bst_register_device - register device with input core

 * @dev: device to be registered

 *

 * This function registers device with input core. The device must be

 * allocated with bst_allocate_device() and all it's capabilities

 * set up before registering.

 * If function fails the device must be freed with bst_free_device().

 * Once device has been successfully registered it can be unregistered

 * with bst_unregister_device(); bst_free_device() should not be

 * called in this case.

 */

int bst_register_device(struct bst_dev *dev)

{

	const char *path;

	int error;





	/*

	 * If delay and period are pre-set by the driver, then autorepeating

	 * is handled by the driver itself and we don't do it in input.c.

	 */

	dev_set_name(&dev->dev, dev->name);



	error = device_add(&dev->dev);

	if (error)

		return error;



	path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);

	printk(KERN_INFO "%s as %s\n",

			dev->name ? dev->name : "Unspecified device",

			path ? path : "N/A");

	kfree(path);

	error = mutex_lock_interruptible(&bst_mutex);

	if (error) {

		device_del(&dev->dev);

		return error;

	}



	list_add_tail(&dev->node, &bst_dev_list);



	mutex_unlock(&bst_mutex);

	return 0;

}

EXPORT_SYMBOL(bst_register_device);



/**

 * bst_unregister_device - unregister previously registered device

 * @dev: device to be unregistered

 *

 * This function unregisters an input device. Once device is unregistered

 * the caller should not try to access it as it may get freed at any moment.

 */

void bst_unregister_device(struct bst_dev *dev)

{

	mutex_lock_interruptible(&bst_mutex);

	list_del_init(&dev->node);

	mutex_unlock(&bst_mutex);

	device_unregister(&dev->dev);

}

EXPORT_SYMBOL(bst_unregister_device);



static int bst_open_file(struct inode *inode, struct file *file)

{

	const struct file_operations *old_fops, *new_fops = NULL;

	int err;



	/*

	 * That's _really_ odd. Usually NULL ->open means "nothing special",

	 * not "no device". Oh, well...

	 */

	if (!new_fops || !new_fops->open) {

		fops_put(new_fops);

		err = -ENODEV;

		goto out;

	}



	old_fops = file->f_op;

	file->f_op = new_fops;



	err = new_fops->open(inode, file);

	if (err) {

		fops_put(file->f_op);

		file->f_op = fops_get(old_fops);

	}

	fops_put(old_fops);

out:

	return err;

}



static const struct file_operations bst_fops = {

	.owner = THIS_MODULE,

	.open = bst_open_file,

	/*.llseek = noop_llseek,*/

};



static int __init bst_init(void)

{

	int err;

	/*bst class register*/

	err = class_register(&bst_class);

	if (err) {

		pr_err("unable to register bst_dev class\n");

		return err;

	}

	return err;

}



static void __exit bst_exit(void)

{

	/*bst class*/

	class_unregister(&bst_class);

}



/*subsys_initcall(bst_init);*/



MODULE_AUTHOR("contact@bosch-sensortec.com");

MODULE_DESCRIPTION("BST CLASS CORE");

MODULE_LICENSE("GPL V2");



module_init(bst_init);

module_exit(bst_exit);

drivers/input/misc/bstclass.h

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+78 −0
Original line number Original line Diff line number Diff line 
/*!

 * @section LICENSE

 * (C) Copyright 2013 Bosch Sensortec GmbH All Rights Reserved

 *

 * This software program is licensed subject to the GNU General

 * Public License (GPL).Version 2,June 1991,

 * available at http://www.fsf.org/copyleft/gpl.html

 *

 * @filename bstclass.h

 * @date     "Fri Aug 2 17:41:45 2013 +0800"

 * @id       "644147c"

 *

 * @brief

 * The core code of bst device driver

*/



#ifndef _BSTCLASS_H

#define _BSTCLASS_H



#ifdef __KERNEL__

#include <linux/time.h>

#include <linux/list.h>

#else

#include <sys/time.h>

#include <sys/ioctl.h>

#include <sys/types.h>

#include <linux/types.h>

#endif



#include <linux/device.h>

#include <linux/fs.h>

#include <linux/mod_devicetable.h>



struct bst_dev {

	const char *name;



	int (*open)(struct bst_dev *dev);

	void (*close)(struct bst_dev *dev);

	struct mutex mutex;

	struct device dev;

	struct list_head node;

};



#define to_bst_dev(d) container_of(d, struct bst_dev, dev)



struct bst_dev *bst_allocate_device(void);

void bst_free_device(struct bst_dev *dev);



static inline struct bst_dev *bst_get_device(struct bst_dev *dev)

{

	return dev ? to_bst_dev(get_device(&dev->dev)) : NULL;

}



static inline void bst_put_device(struct bst_dev *dev)

{

	if (dev)

		put_device(&dev->dev);

}



static inline void *bst_get_drvdata(struct bst_dev *dev)

{

	return dev_get_drvdata(&dev->dev);

}



static inline void bst_set_drvdata(struct bst_dev *dev, void *data)

{

	dev_set_drvdata(&dev->dev, data);

}



int __must_check bst_register_device(struct bst_dev *);

void bst_unregister_device(struct bst_dev *);



void bst_reset_device(struct bst_dev *);





extern struct class bst_class;



#endif