#include "pick_up.h"

static struct pkup_context *pkup_context_obj = NULL;

static struct pkup_init_info* pick_up_init= {0}; //modified
static void pkup_early_suspend(struct early_suspend *h);
static void pkup_late_resume(struct early_suspend *h);

static int resume_enable_status = 0;

static struct pkup_context *pkup_context_alloc_object(void)
{
	struct pkup_context *obj = kzalloc(sizeof(*obj), GFP_KERNEL); 
    	PKUP_LOG("pkup_context_alloc_object++++\n");
	if(!obj)
	{
		PKUP_ERR("Alloc pkup object error!\n");
		return NULL;
	}	
	atomic_set(&obj->wake, 0);
	mutex_init(&obj->pkup_op_mutex);

	PKUP_LOG("pkup_context_alloc_object----\n");
	return obj;
}

int pkup_notify()
{
	int err=0;
	int value=0;
	struct pkup_context *cxt = NULL;
  	cxt = pkup_context_obj;
	PKUP_LOG("pkup_notify++++\n");
	
	value =1;
	input_report_rel(cxt->idev, EVENT_TYPE_PKUP_VALUE, value);
	input_sync(cxt->idev); 
	
	return err;
}

static int pkup_real_enable(int enable)
{
	int err =0;
	struct pkup_context *cxt = NULL;
	cxt = pkup_context_obj;

	if(PKUP_RESUME == enable)
	{
		enable = resume_enable_status;
	}

	if(1==enable)
	{
		resume_enable_status = 1;
		if(atomic_read(&(pkup_context_obj->early_suspend))) //not allow to enable under suspend
		{
			return 0;
		}
		if(false==cxt->is_active_data)
		{
			err = cxt->pkup_ctl.open_report_data(1);
			if(err)
			{ 
				err = cxt->pkup_ctl.open_report_data(1);
				if(err)
				{
					err = cxt->pkup_ctl.open_report_data(1);
					if(err)
					{
						PKUP_ERR("enable_pick_up enable(%d) err 3 timers = %d\n", enable, err);
						return err;
					}
				}
			}
			cxt->is_active_data = true;
			PKUP_LOG("enable_pick_up real enable  \n" );
		}
	}
	else if((0==enable) || (PKUP_SUSPEND == enable))
	{
		if(0==enable)
			resume_enable_status = 0;
		if(true==cxt->is_active_data)
		{
			err = cxt->pkup_ctl.open_report_data(0);
			if(err)
			{ 
				PKUP_ERR("enable_pick_upenable(%d) err = %d\n", enable, err);
			}
			cxt->is_active_data =false;
			PKUP_LOG("enable_pick_up real disable  \n" );
		} 
	}
	return err;
}

int pkup_enable_nodata(int enable)
{
	struct pkup_context *cxt = NULL;
	cxt = pkup_context_obj;
	if(NULL  == cxt->pkup_ctl.open_report_data)
	{
		PKUP_ERR("pkup_enable_nodata:pkup ctl path is NULL\n");
		return -1;
	}

	if(1 == enable)
	{
		cxt->is_active_nodata = true;
	}
	if(0 == enable)
	{
		cxt->is_active_nodata = false;
	}
	pkup_real_enable(enable);
	return 0;
}

static ssize_t pkup_show_enable_nodata(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
	struct pkup_context *cxt = NULL;
	cxt = pkup_context_obj;
	
	PKUP_LOG("pkup active: %d\n", cxt->is_active_nodata);
	return snprintf(buf, PAGE_SIZE, "%d\n", cxt->is_active_nodata); 
}

static ssize_t pkup_store_enable_nodata(struct device* dev, struct device_attribute *attr,
                                  const char *buf, size_t count)
{
	struct pkup_context *cxt = NULL;
	PKUP_LOG("pkup_store_enable nodata buf=%s\n",buf);
	mutex_lock(&pkup_context_obj->pkup_op_mutex);
	cxt = pkup_context_obj;
	if(NULL == cxt->pkup_ctl.open_report_data)
	{
		PKUP_LOG("pkup_ctl enable nodata NULL\n");
		mutex_unlock(&pkup_context_obj->pkup_op_mutex);
	 	return count;
	}
	if (!strncmp(buf, "1", 1))
	{
		pkup_enable_nodata(1);
	}
	else if (!strncmp(buf, "0", 1))
	{
		pkup_enable_nodata(0);
    	}
	else
	{
		PKUP_ERR(" pkup_store enable nodata cmd error !!\n");
	}
	mutex_unlock(&pkup_context_obj->pkup_op_mutex);
	return count;
}

static ssize_t pkup_store_active(struct device* dev, struct device_attribute *attr,
                                  const char *buf, size_t count)
{
	struct pkup_context *cxt = NULL;
	int res =0;
	int en=0;
	PKUP_LOG("pkup_store_active buf=%s\n",buf);
	mutex_lock(&pkup_context_obj->pkup_op_mutex);
	
	cxt = pkup_context_obj;
	if((res = sscanf(buf, "%d", &en))!=1)
	{
		PKUP_LOG(" pkup_store_active param error: res = %d\n", res);
	}
	PKUP_LOG(" pkup_store_active en=%d\n",en);
	if(1 == en)
	{
		pkup_real_enable(1);
	}
	else if(0 == en)
	{
		pkup_real_enable(0);
	}
	else
	{
		PKUP_ERR(" pkup_store_active error !!\n");
	}
	mutex_unlock(&pkup_context_obj->pkup_op_mutex);
	PKUP_LOG(" pkup_store_active done\n");
	return count;
}
/*----------------------------------------------------------------------------*/
static ssize_t pkup_show_active(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
	struct pkup_context *cxt = NULL;
	cxt = pkup_context_obj;

	PKUP_LOG("pkup active: %d\n", cxt->is_active_data);
	return snprintf(buf, PAGE_SIZE, "%d\n", cxt->is_active_data); 
}

static ssize_t pkup_store_delay(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
	int len = 0;
	PKUP_LOG(" not support now\n");
	return len;
}


static ssize_t pkup_show_delay(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
	int len = 0;
	PKUP_LOG(" not support now\n");
	return len;
}


static ssize_t pkup_store_batch(struct device* dev, struct device_attribute *attr,
                                  const char *buf, size_t count)
{
	int len = 0;
	PKUP_LOG(" not support now\n");
	return len;
}

static ssize_t pkup_show_batch(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
	int len = 0;
	PKUP_LOG(" not support now\n");
	return len;
}

static ssize_t pkup_store_flush(struct device* dev, struct device_attribute *attr,
                                  const char *buf, size_t count)
{
	int len = 0;
	PKUP_LOG(" not support now\n");
	return len;
}

static ssize_t pkup_show_flush(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
    int len = 0;
	PKUP_LOG(" not support now\n");
	return len;
}

static ssize_t pkup_show_devnum(struct device* dev, 
                                 struct device_attribute *attr, char *buf) 
{
	char *devname = NULL;
	devname = dev_name(&pkup_context_obj->idev->dev);
	return snprintf(buf, PAGE_SIZE, "%s\n", devname+5);  //TODO: why +5?
}
static int pick_up_remove(struct platform_device *pdev)
{
	PKUP_LOG("pick_up_remove\n");
	return 0;
}

static int pick_up_probe(struct platform_device *pdev) 
{
	PKUP_LOG("pick_up_probe\n");
	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id pick_up_of_match[] = {
	{ .compatible = "mediatek,pick_up", },
	{},
};
#endif

static struct platform_driver pick_up_driver = {
	.probe      = pick_up_probe,
	.remove     = pick_up_remove,    
	.driver     = 
	{
		.name  = "pick_up",
		#ifdef CONFIG_OF
		.of_match_table = pick_up_of_match,
		#endif
	}
};

static int pkup_real_driver_init(void) 
{
	int err=0;
	PKUP_LOG(" pkup_real_driver_init +\n");
	if(0 != pick_up_init)
	{
		PKUP_LOG(" pkup try to init driver %s\n", pick_up_init->name);
		err = pick_up_init->init();
		if(0 == err)
		{
			PKUP_LOG(" pkup real driver %s probe ok\n", pick_up_init->name);
		}
	}
	return err;
}

int pkup_driver_add(struct pkup_init_info* obj) 
{
	int err=0;
	
	PKUP_FUN();
	PKUP_LOG("register pick_up driver for the first time\n");
	if(platform_driver_register(&pick_up_driver))
	{
		PKUP_ERR("failed to register gensor driver already exist\n");
	}
	if(NULL == pick_up_init)
	{
		obj->platform_diver_addr = &pick_up_driver;
		pick_up_init = obj;
	}

	if(NULL==pick_up_init)
	{
		PKUP_ERR("PKUP driver add err \n");
		err=-1;
	}
	
	return err;
}
EXPORT_SYMBOL_GPL(pkup_driver_add);

static int pkup_misc_init(struct pkup_context *cxt)
{
	int err=0;
    //kernel-3.10\include\linux\Miscdevice.h
    //use MISC_DYNAMIC_MINOR exceed 64
	cxt->mdev.minor = M_PKUP_MISC_MINOR;
	cxt->mdev.name  = PKUP_MISC_DEV_NAME;
	if((err = misc_register(&cxt->mdev)))
	{
		PKUP_ERR("unable to register pkup misc device!!\n");
	}
	return err;
}

static void pkup_input_destroy(struct pkup_context *cxt)
{
	struct input_dev *dev = cxt->idev;

	input_unregister_device(dev);
	input_free_device(dev);
}

static int pkup_input_init(struct pkup_context *cxt)
{
	struct input_dev *dev;
	int err = 0;

	dev = input_allocate_device();
	if (NULL == dev)
		return -ENOMEM;

	dev->name = PKUP_INPUTDEV_NAME;
	input_set_capability(dev, EV_REL, EVENT_TYPE_PKUP_VALUE);
	
	input_set_drvdata(dev, cxt);
	set_bit(EV_REL, dev->evbit);
	err = input_register_device(dev);
	if (err < 0) {
		input_free_device(dev);
		return err;
	}
	cxt->idev= dev;

	return 0;
}

DEVICE_ATTR(pkupenablenodata,     	S_IWUSR | S_IRUGO, pkup_show_enable_nodata, pkup_store_enable_nodata);
DEVICE_ATTR(pkupactive,     		S_IWUSR | S_IRUGO, pkup_show_active, pkup_store_active);
DEVICE_ATTR(pkupdelay,      		S_IWUSR | S_IRUGO, pkup_show_delay,  pkup_store_delay);
DEVICE_ATTR(pkupbatch,      		S_IWUSR | S_IRUGO, pkup_show_batch,  pkup_store_batch);
DEVICE_ATTR(pkupflush,      			S_IWUSR | S_IRUGO, pkup_show_flush,  pkup_store_flush);
DEVICE_ATTR(pkupdevnum,      			S_IWUSR | S_IRUGO, pkup_show_devnum,  NULL);


static struct attribute *pkup_attributes[] = {
	&dev_attr_pkupenablenodata.attr,
	&dev_attr_pkupactive.attr,
	&dev_attr_pkupdelay.attr,
	&dev_attr_pkupbatch.attr,
	&dev_attr_pkupflush.attr,
	&dev_attr_pkupdevnum.attr,
	NULL
};

static struct attribute_group pkup_attribute_group = {
	.attrs = pkup_attributes
};

int pkup_register_data_path(struct pkup_data_path *data)
{
	struct pkup_context *cxt = NULL;
	cxt = pkup_context_obj;
	cxt->pkup_data.get_data = data->get_data;
	if(NULL == cxt->pkup_data.get_data)
	{
		PKUP_LOG("pkup register data path fail \n");
	 	return -1;
	}
	return 0;
}

int pkup_register_control_path(struct pkup_control_path *ctl)
{
	struct pkup_context *cxt = NULL;
	int err =0;
	cxt = pkup_context_obj;
//	cxt->pkup_ctl.enable = ctl->enable;
//	cxt->pkup_ctl.enable_nodata = ctl->enable_nodata;
	cxt->pkup_ctl.open_report_data = ctl->open_report_data;
	
	if(NULL==cxt->pkup_ctl.open_report_data)
	{
		PKUP_LOG("pkup register control path fail \n");
	 	return -1;
	}

	//add misc dev for sensor hal control cmd
	err = pkup_misc_init(pkup_context_obj);
	if(err)
	{
		PKUP_ERR("unable to register pkup misc device!!\n");
		return -2;
	}
	err = sysfs_create_group(&pkup_context_obj->mdev.this_device->kobj,
			&pkup_attribute_group);
	if (err < 0)
	{
		PKUP_ERR("unable to create pkup attribute file\n");
		return -3;
	}
	kobject_uevent(&pkup_context_obj->mdev.this_device->kobj, KOBJ_ADD);
	return 0;	
}

static int pkup_probe(struct platform_device *pdev) 
{
	int err;
	PKUP_LOG("+++++++++++++pkup_probe!!\n");

	pkup_context_obj = pkup_context_alloc_object();
	if (!pkup_context_obj)
	{
		err = -ENOMEM;
		PKUP_ERR("unable to allocate devobj!\n");
		goto exit_alloc_data_failed;
	}
	//init real pkup driver
    	err = pkup_real_driver_init();
	if(err)
	{
		PKUP_ERR("pkup real driver init fail\n");
		goto real_driver_init_fail;
	}

	//init input dev
	err = pkup_input_init(pkup_context_obj);
	if(err)
	{
		PKUP_ERR("unable to register pkup input device!\n");
		goto exit_alloc_input_dev_failed;
	}

#if defined(CONFIG_HAS_EARLYSUSPEND) && defined(CONFIG_EARLYSUSPEND)
    	atomic_set(&(pkup_context_obj->early_suspend), 0);
	pkup_context_obj->early_drv.level    = EARLY_SUSPEND_LEVEL_STOP_DRAWING - 1,
	pkup_context_obj->early_drv.suspend  = pkup_early_suspend,
	pkup_context_obj->early_drv.resume   = pkup_late_resume,    
	register_early_suspend(&pkup_context_obj->early_drv);
#endif //#if defined(CONFIG_HAS_EARLYSUSPEND) && defined(CONFIG_EARLYSUSPEND)
  
	PKUP_LOG("----pkup_probe OK !!\n");
	return 0;


	if (err)
	{
	   PKUP_ERR("sysfs node creation error \n");
	   pkup_input_destroy(pkup_context_obj);
	}
	real_driver_init_fail:
	exit_alloc_input_dev_failed:    
	kfree(pkup_context_obj);
	exit_alloc_data_failed:
	PKUP_LOG("----pkup_probe fail !!!\n");
	return err;
}

static int pkup_remove(struct platform_device *pdev)
{
	int err=0;
	PKUP_FUN(f);
	input_unregister_device(pkup_context_obj->idev);        
	sysfs_remove_group(&pkup_context_obj->idev->dev.kobj,
				&pkup_attribute_group);
	
	if((err = misc_deregister(&pkup_context_obj->mdev)))
	{
		PKUP_ERR("misc_deregister fail: %d\n", err);
	}
	kfree(pkup_context_obj);
	return 0;
}

static void pkup_early_suspend(struct early_suspend *h) 
{
	atomic_set(&(pkup_context_obj->early_suspend), 1);
	if(!atomic_read(&pkup_context_obj->wake)) //not wake up, disable in early suspend
	{
		pkup_real_enable(PKUP_SUSPEND);
	}
	PKUP_LOG(" pkup_early_suspend ok------->hwm_obj->early_suspend=%d \n",atomic_read(&(pkup_context_obj->early_suspend)));
	return ;
}
/*----------------------------------------------------------------------------*/
static void pkup_late_resume(struct early_suspend *h)
{
	atomic_set(&(pkup_context_obj->early_suspend), 0);
	if(!atomic_read(&pkup_context_obj->wake) && resume_enable_status) //not wake up, disable in early suspend
	{
		pkup_real_enable(PKUP_RESUME);
	}
	PKUP_LOG(" pkup_late_resume ok------->hwm_obj->early_suspend=%d \n",atomic_read(&(pkup_context_obj->early_suspend)));
	return ;
}

#if !defined(CONFIG_HAS_EARLYSUSPEND) || !defined(USE_EARLY_SUSPEND)
static int pkup_suspend(struct platform_device *dev, pm_message_t state) 
{
	atomic_set(&(pkup_context_obj->suspend), 1);
	if(!atomic_read(&pkup_context_obj->wake)) //not wake up, disable in early suspend
	{
		pkup_real_enable(PKUP_SUSPEND);
	}
	PKUP_LOG(" pkup_suspend ok------->hwm_obj->suspend=%d \n",atomic_read(&(pkup_context_obj->suspend)));
	return 0;
}
/*----------------------------------------------------------------------------*/
static int pkup_resume(struct platform_device *dev)
{
	atomic_set(&(pkup_context_obj->suspend), 0);
	if(!atomic_read(&pkup_context_obj->wake) && resume_enable_status) //not wake up, disable in early suspend
	{
		pkup_real_enable(PKUP_RESUME);
	}
	PKUP_LOG(" pkup_resume ok------->hwm_obj->suspend=%d \n",atomic_read(&(pkup_context_obj->suspend)));
	return 0;
}
#endif //#if !defined(CONFIG_HAS_EARLYSUSPEND) || !defined(USE_EARLY_SUSPEND)

#ifdef CONFIG_OF
static const struct of_device_id m_pkup_pl_of_match[] = {
	{ .compatible = "mediatek,m_pkup_pl", },
	{},
};
#endif

static struct platform_driver pkup_driver =
{
	.probe      = pkup_probe,
	.remove     = pkup_remove,    
#if !defined(CONFIG_HAS_EARLYSUSPEND) || !defined(USE_EARLY_SUSPEND)
	.suspend    = pkup_suspend,
	.resume     = pkup_resume,
#endif
	.driver     = 
	{
		.name = PKUP_PL_DEV_NAME,
		#ifdef CONFIG_OF
		.of_match_table = m_pkup_pl_of_match,
		#endif
	}
};

static int __init pkup_init(void) 
{
	PKUP_FUN();

	if(platform_driver_register(&pkup_driver))
	{
		PKUP_ERR("failed to register pkup driver\n");
		return -ENODEV;
	}
	
	return 0;
}

static void __exit pkup_exit(void)
{
	platform_driver_unregister(&pkup_driver); 
	platform_driver_unregister(&pick_up_driver);      
}

late_initcall(pkup_init);
//module_init(pkup_init);
//module_exit(pkup_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PKUP device driver");
MODULE_AUTHOR("Mediatek");