C++ (Cpp) get_ready_ep Examples

Example #1

File: inode.c Project: SpiriLiao/linux

static long ep_ioctl(struct file *fd, unsigned code, unsigned long value)
{
	struct ep_data		*data = fd->private_data;
	int			status;

	if ((status = get_ready_ep (fd->f_flags, data, false)) < 0)
		return status;

	spin_lock_irq (&data->dev->lock);
	if (likely (data->ep != NULL)) {
		switch (code) {
		case GADGETFS_FIFO_STATUS:
			status = usb_ep_fifo_status (data->ep);
			break;
		case GADGETFS_FIFO_FLUSH:
			usb_ep_fifo_flush (data->ep);
			break;
		case GADGETFS_CLEAR_HALT:
			status = usb_ep_clear_halt (data->ep);
			break;
		default:
			status = -ENOTTY;
		}
	} else
		status = -ENODEV;
	spin_unlock_irq (&data->dev->lock);
	mutex_unlock(&data->lock);
	return status;
}

Example #2

/* handle a synchronous IN bulk/intr/iso transfer */
static ssize_t
ep_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
{
	struct ep_data		*data = fd->private_data;
	void			*kbuf;
	ssize_t			value;

	if ((value = get_ready_ep (fd->f_flags, data)) < 0)
		return value;

	/* halt any endpoint by doing a "wrong direction" i/o call */
	if (!usb_endpoint_dir_in(&data->desc)) {
		if (usb_endpoint_xfer_isoc(&data->desc)) {
			mutex_unlock(&data->lock);
			return -EINVAL;
		}
		DBG (data->dev, "%s halt\n", data->name);
		spin_lock_irq (&data->dev->lock);
		if (likely (data->ep != NULL))
			usb_ep_set_halt (data->ep);
		spin_unlock_irq (&data->dev->lock);
		mutex_unlock(&data->lock);
		return -EBADMSG;
	}

	/* FIXME writebehind for O_NONBLOCK and poll(), qlen = 1 */

	value = -ENOMEM;
	kbuf = kmalloc (len, GFP_KERNEL);
	if (!kbuf)
		goto free1;
	if (copy_from_user (kbuf, buf, len)) {
		value = -EFAULT;
		goto free1;
	}

	value = ep_io (data, kbuf, len);
	VDEBUG (data->dev, "%s write %zu IN, status %d\n",
		data->name, len, (int) value);
free1:
	mutex_unlock(&data->lock);
	kfree (kbuf);
	return value;
}

Example #3

/* handle a synchronous OUT bulk/intr/iso transfer */
static ssize_t
ep_read (struct file *fd, char __user *buf, size_t len, loff_t *ptr)
{
	struct ep_data		*data = fd->private_data;
	void			*kbuf;
	ssize_t			value;

	if ((value = get_ready_ep (fd->f_flags, data)) < 0)
		return value;

	/* halt any endpoint by doing a "wrong direction" i/o call */
	if (usb_endpoint_dir_in(&data->desc)) {
		if (usb_endpoint_xfer_isoc(&data->desc)) {
			mutex_unlock(&data->lock);
			return -EINVAL;
		}
		DBG (data->dev, "%s halt\n", data->name);
		spin_lock_irq (&data->dev->lock);
		if (likely (data->ep != NULL))
			usb_ep_set_halt (data->ep);
		spin_unlock_irq (&data->dev->lock);
		mutex_unlock(&data->lock);
		return -EBADMSG;
	}

	/* FIXME readahead for O_NONBLOCK and poll(); careful with ZLPs */

	value = -ENOMEM;
	kbuf = kmalloc (len, GFP_KERNEL);
	if (unlikely (!kbuf))
		goto free1;

	value = ep_io (data, kbuf, len);
	VDEBUG (data->dev, "%s read %zu OUT, status %d\n",
		data->name, len, (int) value);
	if (value >= 0 && copy_to_user (buf, kbuf, value))
		value = -EFAULT;

free1:
	mutex_unlock(&data->lock);
	kfree (kbuf);
	return value;
}