#include "shake.h"

static struct shk_context *shk_context_obj;

static struct shk_init_info *shake_init = { 0 };	/* modified */

static void shk_early_suspend(struct early_suspend *h);
static void shk_late_resume(struct early_suspend *h);

static int resume_enable_status;

static struct shk_context *shk_context_alloc_object(void)
{
	struct shk_context *obj = kzalloc(sizeof(*obj), GFP_KERNEL);

	SHK_LOG("shk_context_alloc_object++++\n");
	if (!obj) {
		SHK_ERR("Alloc shk object error!\n");
		return NULL;
	}
	atomic_set(&obj->wake, 0);
	mutex_init(&obj->shk_op_mutex);

	SHK_LOG("shk_context_alloc_object----\n");
	return obj;
}

int shk_notify(void)
{
	int err = 0;
	int value = 0;
	struct shk_context *cxt = NULL;

	cxt = shk_context_obj;
	SHK_LOG("shk_notify++++\n");

	value = 1;
	input_report_rel(cxt->idev, EVENT_TYPE_SHK_VALUE, value);
	input_sync(cxt->idev);

	return err;
}

static int shk_real_enable(int enable)
{
	int err = 0;
	struct shk_context *cxt = NULL;

	cxt = shk_context_obj;

	if (SHK_RESUME == enable)
		enable = resume_enable_status;

	if (1 == enable) {
		resume_enable_status = 1;
		if (atomic_read(&(shk_context_obj->early_suspend)))	/* not allow to enable under suspend */
			return 0;

		if (false == cxt->is_active_data) {
			err = cxt->shk_ctl.open_report_data(1);
			if (err) {
				err = cxt->shk_ctl.open_report_data(1);
				if (err) {
					err = cxt->shk_ctl.open_report_data(1);
					if (err) {
						SHK_ERR
						    ("enable_shake enable(%d) err 3 timers = %d\n",
						     enable, err);
						return err;
					}
				}
			}
			cxt->is_active_data = true;
			SHK_LOG("enable_shake real enable\n");
		}
	} else if ((0 == enable) || (SHK_SUSPEND == enable)) {
		if (0 == enable)
			resume_enable_status = 0;
		if (true == cxt->is_active_data) {
			err = cxt->shk_ctl.open_report_data(0);
			if (err)
				SHK_ERR("enable_shakeenable(%d) err = %d\n", enable, err);

			cxt->is_active_data = false;
			SHK_LOG("enable_shake real disable\n");
		}
	}
	return err;
}

int shk_enable_nodata(int enable)
{
	struct shk_context *cxt = NULL;

	cxt = shk_context_obj;
	if (NULL == cxt->shk_ctl.open_report_data) {
		SHK_ERR("shk_enable_nodata:shk ctl path is NULL\n");
		return -1;
	}

	if (1 == enable)
		cxt->is_active_nodata = true;

	if (0 == enable)
		cxt->is_active_nodata = false;

	shk_real_enable(enable);
	return 0;
}

static ssize_t shk_show_enable_nodata(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct shk_context *cxt = NULL;

	cxt = shk_context_obj;
	SHK_LOG("shk active: %d\n", cxt->is_active_nodata);
	return snprintf(buf, PAGE_SIZE, "%d\n", cxt->is_active_nodata);
}

static ssize_t shk_store_enable_nodata(struct device *dev, struct device_attribute *attr,
				       const char *buf, size_t count)
{
	struct shk_context *cxt = NULL;

	SHK_LOG("shk_store_enable nodata buf=%s\n", buf);
	mutex_lock(&shk_context_obj->shk_op_mutex);
	cxt = shk_context_obj;
	if (NULL == cxt->shk_ctl.open_report_data) {
		SHK_LOG("shk_ctl enable nodata NULL\n");
		mutex_unlock(&shk_context_obj->shk_op_mutex);
		return count;
	}
	if (!strncmp(buf, "1", 1))
		shk_enable_nodata(1);
	else if (!strncmp(buf, "0", 1))
		shk_enable_nodata(0);
	else
		SHK_ERR(" shk_store enable nodata cmd error !!\n");

	mutex_unlock(&shk_context_obj->shk_op_mutex);
	return count;
}

static ssize_t shk_store_active(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct shk_context *cxt = NULL;
	int res = 0;
	int en = 0;

	SHK_LOG("shk_store_active buf=%s\n", buf);
	mutex_lock(&shk_context_obj->shk_op_mutex);

	cxt = shk_context_obj;
	res = kstrtoint(buf, 10, &en);
	if (res != 0)
		SHK_LOG(" shk_store_active param error: res = %d\n", res);

	SHK_LOG(" shk_store_active en=%d\n", en);
	if (1 == en)
		shk_real_enable(1);
	else if (0 == en)
		shk_real_enable(0);
	else
		SHK_ERR(" shk_store_active error !!\n");

	mutex_unlock(&shk_context_obj->shk_op_mutex);
	SHK_LOG(" shk_store_active done\n");
	return count;
}

/*----------------------------------------------------------------------------*/
static ssize_t shk_show_active(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct shk_context *cxt = NULL;

	cxt = shk_context_obj;
	SHK_LOG("shk active: %d\n", cxt->is_active_data);
	return snprintf(buf, PAGE_SIZE, "%d\n", cxt->is_active_data);
}

static ssize_t shk_store_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
	int len = 0;

	SHK_LOG(" not support now\n");
	return len;
}


static ssize_t shk_show_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
	int len = 0;

	SHK_LOG(" not support now\n");
	return len;
}


static ssize_t shk_store_batch(struct device *dev, struct device_attribute *attr,
			       const char *buf, size_t count)
{
	int len = 0;

	SHK_LOG(" not support now\n");
	return len;
}

static ssize_t shk_show_batch(struct device *dev, struct device_attribute *attr, char *buf)
{
	int len = 0;

	SHK_LOG(" not support now\n");
	return len;
}

static ssize_t shk_store_flush(struct device *dev, struct device_attribute *attr,
			       const char *buf, size_t count)
{
	int len = 0;

	SHK_LOG(" not support now\n");
	return len;
}

static ssize_t shk_show_flush(struct device *dev, struct device_attribute *attr, char *buf)
{
	int len = 0;

	SHK_LOG(" not support now\n");
	return len;
}

static ssize_t shk_show_devnum(struct device *dev, struct device_attribute *attr, char *buf)
{
	char *devname = NULL;

	devname = dev_name(&shk_context_obj->idev->dev);
	return snprintf(buf, PAGE_SIZE, "%s\n", devname + 5);	/* TODO: why +5? */
}

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

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

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

static struct platform_driver shake_driver = {
	.probe = shake_probe,
	.remove = shake_remove,
	.driver = {
		   .name = "shake",
#ifdef CONFIG_OF
		   .of_match_table = shake_of_match,
#endif
		   }
};

static int shk_real_driver_init(void)
{
	int err = 0;

	SHK_LOG(" shk_real_driver_init +\n");
	if (0 != shake_init) {
		SHK_LOG(" shk try to init driver %s\n", shake_init->name);
		err = shake_init->init();
		if (0 == err)
			SHK_LOG(" shk real driver %s probe ok\n", shake_init->name);
	}
	return err;
}

int shk_driver_add(struct shk_init_info *obj)
{
	int err = 0;

	SHK_FUN();
	SHK_LOG("register shake driver for the first time\n");
	if (platform_driver_register(&shake_driver))
		SHK_ERR("failed to register gensor driver already exist\n");

	if (NULL == shake_init) {
		obj->platform_diver_addr = &shake_driver;
		shake_init = obj;
	}

	if (NULL == shake_init) {
		SHK_ERR("SHK driver add err\n");
		err = -1;
	}

	return err;
} EXPORT_SYMBOL_GPL(shk_driver_add);

static int shk_misc_init(struct shk_context *cxt)
{
	int err = 0;
	/* kernel-3.10\include\linux\Miscdevice.h */
	/* use MISC_DYNAMIC_MINOR exceed 64 */
	cxt->mdev.minor = M_SHK_MISC_MINOR;
	cxt->mdev.name = SHK_MISC_DEV_NAME;
	err = misc_register(&cxt->mdev);
	if (err)
		SHK_ERR("unable to register shk misc device!!\n");

	return err;
}

static void shk_input_destroy(struct shk_context *cxt)
{
	struct input_dev *dev = cxt->idev;

	input_unregister_device(dev);
	input_free_device(dev);
}

static int shk_input_init(struct shk_context *cxt)
{
	struct input_dev *dev;
	int err = 0;

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

	dev->name = SHK_INPUTDEV_NAME;
	input_set_capability(dev, EV_REL, EVENT_TYPE_SHK_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(shkenablenodata, S_IWUSR | S_IRUGO, shk_show_enable_nodata, shk_store_enable_nodata);
DEVICE_ATTR(shkactive, S_IWUSR | S_IRUGO, shk_show_active, shk_store_active);
DEVICE_ATTR(shkdelay, S_IWUSR | S_IRUGO, shk_show_delay, shk_store_delay);
DEVICE_ATTR(shkbatch, S_IWUSR | S_IRUGO, shk_show_batch, shk_store_batch);
DEVICE_ATTR(shkflush, S_IWUSR | S_IRUGO, shk_show_flush, shk_store_flush);
DEVICE_ATTR(shkdevnum, S_IWUSR | S_IRUGO, shk_show_devnum, NULL);


static struct attribute *shk_attributes[] = {
	&dev_attr_shkenablenodata.attr,
	&dev_attr_shkactive.attr,
	&dev_attr_shkdelay.attr,
	&dev_attr_shkbatch.attr,
	&dev_attr_shkflush.attr,
	&dev_attr_shkdevnum.attr,
	NULL
};

static struct attribute_group shk_attribute_group = {
	.attrs = shk_attributes
};

int shk_register_data_path(struct shk_data_path *data)
{
	struct shk_context *cxt = NULL;

	cxt = shk_context_obj;
	cxt->shk_data.get_data = data->get_data;
	if (NULL == cxt->shk_data.get_data) {
		SHK_LOG("shk register data path fail\n");
		return -1;
	}
	return 0;
}

int shk_register_control_path(struct shk_control_path *ctl)
{
	struct shk_context *cxt = NULL;
	int err = 0;

	cxt = shk_context_obj;
/* cxt->shk_ctl.enable = ctl->enable; */
/* cxt->shk_ctl.enable_nodata = ctl->enable_nodata; */
	cxt->shk_ctl.open_report_data = ctl->open_report_data;

	if (NULL == cxt->shk_ctl.open_report_data) {
		SHK_LOG("shk register control path fail\n");
		return -1;
	}
	/* add misc dev for sensor hal control cmd */
	err = shk_misc_init(shk_context_obj);
	if (err) {
		SHK_ERR("unable to register shk misc device!!\n");
		return -2;
	}
	err = sysfs_create_group(&shk_context_obj->mdev.this_device->kobj, &shk_attribute_group);
	if (err < 0) {
		SHK_ERR("unable to create shk attribute file\n");
		return -3;
	}
	kobject_uevent(&shk_context_obj->mdev.this_device->kobj, KOBJ_ADD);
	return 0;
}

static int shk_probe(struct platform_device *pdev)
{
	int err;

	SHK_LOG("+++++++++++++shk_probe!!\n");
	shk_context_obj = shk_context_alloc_object();
	if (!shk_context_obj) {
		err = -ENOMEM;
		SHK_ERR("unable to allocate devobj!\n");
		goto exit_alloc_data_failed;
	}
	/* init real shk driver */
	err = shk_real_driver_init();
	if (err) {
		SHK_ERR("shk real driver init fail\n");
		goto real_driver_init_fail;
	}
	/* init input dev */
	err = shk_input_init(shk_context_obj);
	if (err) {
		SHK_ERR("unable to register shk input device!\n");
		goto exit_alloc_input_dev_failed;
	}
#if defined(CONFIG_HAS_EARLYSUSPEND) && defined(CONFIG_EARLYSUSPEND)
	atomic_set(&(shk_context_obj->early_suspend), 0);
	shk_context_obj->early_drv.level = EARLY_SUSPEND_LEVEL_STOP_DRAWING - 1,
	    shk_context_obj->early_drv.suspend = shk_early_suspend,
	    shk_context_obj->early_drv.resume = shk_late_resume,
	    register_early_suspend(&shk_context_obj->early_drv);
#endif				/* #if defined(CONFIG_HAS_EARLYSUSPEND) && defined(CONFIG_EARLYSUSPEND) */

	SHK_LOG("----shk_probe OK !!\n");
	return 0;


	if (err) {
		SHK_ERR("sysfs node creation error\n");
		shk_input_destroy(shk_context_obj);
	}
real_driver_init_fail:
exit_alloc_input_dev_failed:
	kfree(shk_context_obj);
exit_alloc_data_failed:
	SHK_LOG("----shk_probe fail !!!\n");
	return err;
}

static int shk_remove(struct platform_device *pdev)
{
	int err = 0;

	SHK_FUN(f);
	input_unregister_device(shk_context_obj->idev);
	sysfs_remove_group(&shk_context_obj->idev->dev.kobj, &shk_attribute_group);

	err = misc_deregister(&shk_context_obj->mdev);
	if (err)
		SHK_ERR("misc_deregister fail: %d\n", err);

	kfree(shk_context_obj);
	return 0;
}

static void shk_early_suspend(struct early_suspend *h)
{
	atomic_set(&(shk_context_obj->early_suspend), 1);
	if (!atomic_read(&shk_context_obj->wake))	/* not wake up, disable in early suspend */
		shk_real_enable(SHK_SUSPEND);

	SHK_LOG(" shk_early_suspend ok------->hwm_obj->early_suspend=%d\n",
		atomic_read(&(shk_context_obj->early_suspend)));
}

/*----------------------------------------------------------------------------*/
static void shk_late_resume(struct early_suspend *h)
{
	atomic_set(&(shk_context_obj->early_suspend), 0);
	if (!atomic_read(&shk_context_obj->wake) && resume_enable_status)
		shk_real_enable(SHK_RESUME);

	SHK_LOG(" shk_late_resume ok------->hwm_obj->early_suspend=%d\n",
		atomic_read(&(shk_context_obj->early_suspend)));
}

#if !defined(CONFIG_HAS_EARLYSUSPEND) || !defined(USE_EARLY_SUSPEND)
static int shk_suspend(struct platform_device *dev, pm_message_t state)
{
	atomic_set(&(shk_context_obj->suspend), 1);
	if (!atomic_read(&shk_context_obj->wake))	/* not wake up, disable in early suspend */
		shk_real_enable(SHK_SUSPEND);

	SHK_LOG(" shk_early_suspend ok------->hwm_obj->suspend=%d\n",
		atomic_read(&(shk_context_obj->suspend)));
	return 0;
}

/*----------------------------------------------------------------------------*/
static int shk_resume(struct platform_device *dev)
{
	atomic_set(&(shk_context_obj->suspend), 0);
	if (!atomic_read(&shk_context_obj->wake) && resume_enable_status)
		shk_real_enable(SHK_RESUME);

	SHK_LOG(" shk_resume ok------->hwm_obj->suspend=%d\n",
		atomic_read(&(shk_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_shk_pl_of_match[] = {
	{.compatible = "mediatek,m_shk_pl",},
	{},
};
#endif

static struct platform_driver shk_driver = {
	.probe = shk_probe,
	.remove = shk_remove,
#if !defined(CONFIG_HAS_EARLYSUSPEND) || !defined(USE_EARLY_SUSPEND)
	.suspend = shk_suspend,
	.resume = shk_resume,
#endif
	.driver = {
		   .name = SHK_PL_DEV_NAME,
#ifdef CONFIG_OF
		   .of_match_table = m_shk_pl_of_match,
#endif
		   }
};

static int __init shk_init(void)
{
	SHK_FUN();

	if (platform_driver_register(&shk_driver)) {
		SHK_ERR("failed to register shk driver\n");
		return -ENODEV;
	}

	return 0;
}

static void __exit shk_exit(void)
{
	platform_driver_unregister(&shk_driver);
	platform_driver_unregister(&shake_driver);
}

late_initcall(shk_init);
/* module_init(shk_init); */
/* module_exit(shk_exit); */
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHK device driver");
MODULE_AUTHOR("Mediatek");