#include "dvb_adapter.h"
#include "dvbdev.h"

#define dprintk printk

static DEFINE_MUTEX(adaptor_mutex);

struct dvb_adaptor_private {
	struct dvb_device	*dvbdev;
	struct semaphore	sem;
	unsigned int		exit;
};

static int dvb_adaptor_ioctl(struct inode *inode, struct file *file,
			     unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev			= file->private_data;
	struct dvb_adaptor *adaptor			= dvbdev->priv;
	struct dvb_adaptor_private *adaptor_priv	= adaptor->adaptor_priv;

	int err = -EOPNOTSUPP;

	dprintk("%s\n", __func__);
	if (!adaptor || adaptor_priv->exit)
		return -ENODEV;

	if ((file->f_flags & O_ACCMODE) == O_RDONLY && (_IOC_DIR(cmd) != _IOC_READ))
		return -EPERM;

	if (down_interruptible(&adaptor_priv->sem))
		return -ERESTARTSYS;

	switch (cmd) {
	};

	up(&adaptor_priv->sem);
	return err;
}


static int dvb_adaptor_open(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev			= file->private_data;
	struct dvb_adaptor *adaptor 			= dvbdev->priv;
	struct dvb_adaptor_private *adaptor_priv 	= adaptor->adaptor_priv;

	int ret;

	dprintk("%s\n", __func__);
	if ((ret = dvb_generic_open(inode, file)) < 0)
		return ret;

	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {

	}

	return ret;
}

static int dvb_adaptor_release(struct inode *inode, struct file *file)
{
	struct dvb_device  *dvbdev 			= file->private_data;
	struct dvb_adaptor *adaptor 			= dvbdev->priv;
	struct dvb_adaptor_private *adaptor_priv 	= adaptor->adaptor_priv;

	dprintk("%s\n", __func__);
//	if ((file->f_flags & O_ACCMODE) != O_RDONLY)
//		fepriv->release_jiffies = jiffies;

	return dvb_generic_release(inode, file);
}

static struct file_operations dvb_adaptor_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= dvb_generic_ioctl,
	.open		= dvb_adaptor_open,
	.release	= dvb_adaptor_release
//	.poll		= dvb_adaptor_poll,
};

struct dvb_adaptor_obj *dvb_adapter_obj_register(struct dvb_adaptor *adaptor, char *name, enum dvb_adaptor_type type)
{
	struct dvb_adaptor_obj *adaptor_obj = NULL;

	adaptor_obj = kzalloc(sizeof (struct dvb_adaptor_obj), GFP_KERNEL);

	adaptor_obj->dvb		= adaptor;
	adaptor_obj->object_type	= type;
	strlcpy(adaptor_obj->object_name, name, sizeof (name));
	list_add_tail(&adaptor_obj->list, &adaptor->list);

	return adaptor_obj;
}

int dvb_adapter_obj_unregister(struct dvb_adaptor_obj *adaptor_obj)
{
	if (adaptor_obj->dvb)
		list_del(&adaptor_obj->list);
	kfree(adaptor_obj);

	return 0;
}

int dvb_register_adaptor(struct dvb_adapter *dvb, struct dvb_adaptor *adaptor)
{
	struct dvb_adaptor_private *adaptor_priv	= NULL;

	static const struct dvb_device dvbdev_template = {
		.users		= ~0,
		.writers	= 1,
		.readers	= (~0)-1,
		.fops		= &dvb_adaptor_fops,
		.kernel_ioctl	= dvb_adaptor_ioctl
	};

	if (mutex_lock_interruptible(&adaptor_mutex))
		return -ERESTARTSYS;

	adaptor->adaptor_priv = kzalloc(sizeof (struct dvb_adaptor_private), GFP_KERNEL);
	if (adaptor->adaptor_priv == NULL) {
		mutex_unlock(&adaptor_mutex);
		return -ENOMEM;
	}
	INIT_LIST_HEAD(&adaptor->list);
	adaptor_priv = adaptor->adaptor_priv;
	adaptor->dvb = dvb;
	printk("DVB: registering adaptor (%d) (%s Rev %d on a %s %s)\n",
	       adaptor->dvb->num,
	       adaptor->ops.info.adaptor_name,
	       adaptor->ops.info.adaptor_rev,
	       adaptor->ops.info.adaptor_model);

	dvb_register_device(adaptor->dvb, &adaptor_priv->dvbdev, &dvbdev_template,
			    adaptor, DVB_DEVICE_ADAPTOR);

	mutex_unlock(&adaptor_mutex);
	return 0;
}
EXPORT_SYMBOL(dvb_register_adaptor);

int dvb_unregister_adaptor(struct dvb_adaptor *adaptor)
{
	struct dvb_adaptor_private *adaptor_priv = adaptor->adaptor_priv;
	
	dprintk("%s\n", __func__);
	mutex_lock(&adaptor_mutex);
	dvb_unregister_device(adaptor_priv->dvbdev);

	kfree(adaptor_priv);
	mutex_unlock(&adaptor_mutex);
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_adaptor);