/*
 * USB pqlabseton driver - 2.2
 *
 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License as
 *	published by the Free Software Foundation, version 2.
 *
 * This driver is based on the 2.6.3 version of drivers/usb/usb-pqlabseton.c
 * but has been rewritten to be easier to read and use.
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kref.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/compat.h>
#include <linux/version.h>


/* Define these values to match your devices */
#define USB_PQLABS_VENDOR_ID                 0x1EF1
#define USB_PQLABS_PRODUCT_ID                0x0001
#define USB_PQLABS_PRODUCT_ID2               0x0011
#define USB_PQLABS_INTERFACE_CLASS           0xFF
#define USB_PQLABS_INTERFACE_SUBCLASS        0x0
#define USB_PQLABS_INTERFACE_PROTOCOL        0x0

struct pqlabs_string_descriptor
{
  __s32 index;
  char value[256];
};


#define USB_IOCTL_GET_STRING                 _IOR('Q', 0x04, struct pqlabs_string_descriptor)
#define USB_IOCTL_CLEAR_FEATURE              _IOR('Q', 0x05, int)

/* table of devices that work with this driver */
static struct usb_device_id pqlabs_table[] = {
//      {USB_DEVICE(USB_PQLABS_VENDOR_ID, USB_PQLABS_PRODUCT_ID)},
    {USB_DEVICE_AND_INTERFACE_INFO(USB_PQLABS_VENDOR_ID, 
                                   USB_PQLABS_PRODUCT_ID, 
                                   USB_PQLABS_INTERFACE_CLASS, 
                                   USB_PQLABS_INTERFACE_SUBCLASS, 
                                   USB_PQLABS_INTERFACE_PROTOCOL)},
    {USB_DEVICE_AND_INTERFACE_INFO(USB_PQLABS_VENDOR_ID, 
                                   USB_PQLABS_PRODUCT_ID2, 
                                   USB_PQLABS_INTERFACE_CLASS, 
                                   USB_PQLABS_INTERFACE_SUBCLASS, 
                                   USB_PQLABS_INTERFACE_PROTOCOL)},
                                   
                                   
	{ }					/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, pqlabs_table);


/* Get a minor range for your devices from the usb maintainer */
#define USB_pqlabs_MINOR_BASE	192

/* our private defines. if this grows any larger, use your own .h file */
#define MAX_TRANSFER		(PAGE_SIZE - 512)
/* MAX_TRANSFER is chosen so that the VM is not stressed by
   allocations > PAGE_SIZE and the number of packets in a page
   is an integer 512 is the largest possible packet on EHCI */
#define WRITES_IN_FLIGHT	8
/* arbitrarily chosen */

/* Structure to hold all of our device specific stuff */
struct usb_pqlabs {
	struct usb_device       *udev;			/* the usb device for this device */
	struct usb_interface    *interface;		/* the interface for this device */
	struct semaphore        limit_sem;		/* limiting the number of writes in progress */
	struct usb_anchor       submitted;		/* in case we need to retract our submissions */
	struct urb              *bulk_in_urb;		/* the urb to read data with */
	unsigned char           *bulk_in_buffer;	/* the buffer to receive data */
	size_t                  bulk_in_size;		/* the size of the receive buffer */
	size_t                  bulk_in_filled;		/* number of bytes in the buffer */
	size_t                  bulk_in_copied;		/* already copied to user space */
        size_t                  bulk_total;
	__u8                    bulk_in_endpointAddr;	/* the address of the bulk in endpoint */
	__u8                    bulk_out_endpointAddr;	/* the address of the bulk out endpoint */
	int                     errors;			/* the last request tanked */
	int                     open_count;		/* count the number of openers */
	bool                    ongoing_read;		/* a read is going on */
	bool                    processed_urb;		/* indicates we haven't processed the urb */
	bool                    submitted_urb;
	spinlock_t              err_lock;		/* lock for errors */
	struct kref             kref;
	struct mutex            io_mutex;		/* synchronize I/O with disconnect */
	struct completion       bulk_in_completion;	/* to wait for an ongoing read */
        bool 			disconnecting;
};
#define to_pqlabs_dev(d) container_of(d, struct usb_pqlabs, kref)

static struct usb_driver pqlabs_driver;
static void pqlabs_draw_down(struct usb_pqlabs *dev);

static void pqlabs_delete(struct kref *kref)
{
	struct usb_pqlabs *dev = to_pqlabs_dev(kref);

	usb_free_urb(dev->bulk_in_urb);
	usb_put_dev(dev->udev);
	kfree(dev->bulk_in_buffer);
	kfree(dev);
}

static int pqlabs_open(struct inode *inode, struct file *file)
{
	struct usb_pqlabs *dev;
	struct usb_interface *interface;
	int subminor;
	int retval = 0;

	subminor = iminor(inode);

	interface = usb_find_interface(&pqlabs_driver, subminor);
	if (!interface) {
		//err("%s - error, can't find device for minor %d",
		     //__func__, subminor);
		retval = -ENODEV;
		goto exit;
	}

	dev = usb_get_intfdata(interface);
	if (!dev) {
		retval = -ENODEV;
		goto exit;
	}

	/* increment our usage count for the device */
	kref_get(&dev->kref);

	/* lock the device to allow correctly handling errors
	 * in resumption */
	mutex_lock(&dev->io_mutex);

	if (!dev->open_count++) {
		retval = usb_autopm_get_interface(interface);
			if (retval) {
				dev->open_count--;
				mutex_unlock(&dev->io_mutex);
				kref_put(&dev->kref, pqlabs_delete);
				goto exit;
			}
	}  else { //uncomment this block if you want exclusive open
		retval = -EBUSY;
		dev->open_count--;
		mutex_unlock(&dev->io_mutex);
		kref_put(&dev->kref, pqlabs_delete);
		goto exit;
	} 
	/* prevent the device from being autosuspended */

	/* save our object in the file's private structure */
	file->private_data = dev;
	mutex_unlock(&dev->io_mutex);

exit:
	return retval;
}

static int pqlabs_release(struct inode *inode, struct file *file)
{
	struct usb_pqlabs *dev;

	dev = (struct usb_pqlabs *)file->private_data;
	if (dev == NULL)
		return -ENODEV;

	/* allow the device to be autosuspended */
	mutex_lock(&dev->io_mutex);
	if (!--dev->open_count && dev->interface)
		usb_autopm_put_interface(dev->interface);
	mutex_unlock(&dev->io_mutex);
        spin_lock(&dev->err_lock);
        dev->ongoing_read = 0;
        dev->submitted_urb = 0;
        spin_unlock(&dev->err_lock);

	/* decrement the count on our device */
	kref_put(&dev->kref, pqlabs_delete);
	return 0;
}

static int pqlabs_flush(struct file *file, fl_owner_t id)
{
	struct usb_pqlabs *dev;
	int res;

	dev = (struct usb_pqlabs *)file->private_data;
	if (dev == NULL)
		return -ENODEV;

	/* wait for io to stop */
	mutex_lock(&dev->io_mutex);
	pqlabs_draw_down(dev);

	/* read out errors, leave subsequent opens a clean slate */
	spin_lock_irq(&dev->err_lock);
	res = dev->errors ? (dev->errors == -EPIPE ? -EPIPE : -EIO) : 0;
	dev->errors = 0;
	spin_unlock_irq(&dev->err_lock);

	mutex_unlock(&dev->io_mutex);

	return res;
}

static void pqlabs_read_bulk_callback(struct urb *urb)
{
  struct usb_pqlabs *dev;

  dev = urb->context;

  /* sync/async unlink faults aren't errors */
  if (urb->status) {
    //err("%s - nonzero write bulk status received: %d", __func__, urb->status);
/*
    if (!(urb->status == -ENOENT ||
          urb->status == -ECONNRESET ||
          urb->status == -ESHUTDOWN))
    err("%s - nonzero write bulk status received: %d", __func__, urb->status);
*/
    dev->errors = urb->status;
  } else {
    dev->bulk_in_filled = urb->actual_length;
    //if (dev->bulk_in_filled == 0) dev->bulk_in_filled = dev->bulk_in_size + 1;              
  }

  dev->submitted_urb = 0;

  complete(&dev->bulk_in_completion);
}

static int pqlabs_do_read_io(struct usb_pqlabs *dev, size_t count)
{
  int rv;

  /* prepare a read */
  usb_fill_bulk_urb(dev->bulk_in_urb,
                    dev->udev,
                    usb_rcvbulkpipe(dev->udev,
                    dev->bulk_in_endpointAddr),
                    dev->bulk_in_buffer,
                    min(dev->bulk_in_size, count),
                    pqlabs_read_bulk_callback,
                    dev);

  /* tell everybody to leave the URB alone */
  //spin_lock_irq(&dev->err_lock);
  //dev->ongoing_read = 1;
  //spin_unlock_irq(&dev->err_lock);

  /* do it */
  rv = usb_submit_urb(dev->bulk_in_urb, GFP_KERNEL);
  if (rv < 0) {
    //err("%s - failed submitting read urb, error %d", __func__, rv);
    dev->bulk_in_filled = 0;
    rv = (rv == -ENOMEM) ? rv : -EIO;
    //spin_lock_irq(&dev->err_lock);
    //dev->ongoing_read = 0;
    //spin_unlock_irq(&dev->err_lock);
  }
  else
  {
    dev->submitted_urb = 1;
  }
  return rv;
}

#define READ_USB_MAX_LENGTH			(64 * 1024)
#define READ_USB_TIMEOUT			(1000)
static ssize_t pqlabs_read(struct file *file, char *buffer, size_t count,
			 loff_t *ppos)
{
  struct usb_pqlabs *dev;
  int rv;
  //bool ongoing_io;

  dev = (struct usb_pqlabs *)file->private_data;

  /* if we cannot read at all, return EOF */
  if (!dev->bulk_in_urb || !count || count > READ_USB_MAX_LENGTH)
    return 0;

  if (dev->disconnecting)
    return -ENODEV;

  /* no concurrent readers */
  rv = mutex_lock_interruptible(&dev->io_mutex);
  if (rv < 0)
  {
    return rv;
  }

  if (!dev->interface) {		/* disconnect() was called */
    rv = -ENODEV;
    goto exit;
  }
        
  dev->bulk_in_filled = 0;
  dev->processed_urb = 0;

  if (!(dev->processed_urb) && dev->submitted_urb)  
  {
    rv = wait_for_completion_interruptible_timeout(&dev->bulk_in_completion, msecs_to_jiffies(READ_USB_TIMEOUT));
    if (rv <= 0)
    {
      usb_kill_urb(dev->bulk_in_urb);
      dev->submitted_urb = 0;
      goto exit;
    }
  }
  else
  {

    rv = pqlabs_do_read_io(dev, count);
    if (rv < 0)
    {
      goto exit;
    }


    while(1)
    {
      rv = wait_for_completion_interruptible_timeout(&dev->bulk_in_completion, msecs_to_jiffies(READ_USB_TIMEOUT));
      if (rv == msecs_to_jiffies(READ_USB_TIMEOUT) && dev->bulk_in_filled == 0)
      {
        rv = wait_for_completion_interruptible_timeout(&dev->bulk_in_completion, msecs_to_jiffies      (READ_USB_TIMEOUT));
      }

      if (rv > 0) break;

      if (rv == 0)
      {
        //printk("%s: timeout!\n", __func__);
        if (dev->disconnecting == 1) 
        {
          printk("%s: disconnected break!\n", __func__);
          goto exit;
        }
	      dev->submitted_urb = 0;
        rv = -1;
        usb_kill_urb(dev->bulk_in_urb);
	      goto exit;
      }

      if (rv < 0)
      {
      	usb_kill_urb(dev->bulk_in_urb);
        dev->submitted_urb = 0;
        goto exit;
      }
    }
  }

  rv = dev->errors;
  if (rv < 0)
  {
    dev->errors = 0;
    rv = (rv == -EPIPE) ? rv : -EIO;
    goto exit;
  }

  if (dev->bulk_in_filled == 0)
  {
    rv = 0;
    goto exit;
  }

  if (copy_to_user(buffer, dev->bulk_in_buffer, dev->bulk_in_filled))
    rv = -EFAULT;
  else
    rv = dev->bulk_in_filled;

exit:
  mutex_unlock(&dev->io_mutex);
  return rv;
}

static void pqlabs_write_bulk_callback(struct urb *urb)
{
	struct usb_pqlabs *dev;

	dev = urb->context;

	/* sync/async unlink faults aren't errors */
	if (urb->status) {
	/*
		if (!(urb->status == -ENOENT ||
		    urb->status == -ECONNRESET ||
		    urb->status == -ESHUTDOWN))
			err("%s - nonzero write bulk status received: %d",
			    __func__, urb->status);
  */
		spin_lock(&dev->err_lock);
		dev->errors = urb->status;
		spin_unlock(&dev->err_lock);
	}

	/* free up our allocated buffer */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
        usb_buffer_free
#else
	usb_free_coherent
#endif  
                       (urb->dev, urb->transfer_buffer_length,
			  urb->transfer_buffer, urb->transfer_dma);
	up(&dev->limit_sem);
}

static ssize_t pqlabs_write(struct file *file, const char *user_buffer, size_t count, loff_t *ppos)
{
  struct usb_pqlabs *dev;
	int retval = 0;
	struct urb *urb = NULL;
	char *buf = NULL;
	size_t writesize = min(count, (size_t)MAX_TRANSFER);

	dev = (struct usb_pqlabs*)file->private_data;

	/* verify that we actually have some data to write */
	if (count == 0)
		goto exit;

	/*
	 * limit the number of URBs in flight to stop a user from using up all
	 * RAM
	 */
	if (!(file->f_flags & O_NONBLOCK)) {
		if (down_interruptible(&dev->limit_sem)) {
			retval = -ERESTARTSYS;
			goto exit;
		}
	} else {
		if (down_trylock(&dev->limit_sem)) {
			retval = -EAGAIN;
			goto exit;
		}
	}

	spin_lock_irq(&dev->err_lock);
	retval = dev->errors;
	if (retval < 0) {
		/* any error is reported once */
		dev->errors = 0;
		/* to preserve notifications about reset */
		retval = (retval == -EPIPE) ? retval : -EIO;
	}
	spin_unlock_irq(&dev->err_lock);
	if (retval < 0)
		goto error;

	/* create a urb, and a buffer for it, and copy the data to the urb */
	urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!urb) {
		retval = -ENOMEM;
		goto error;
	}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
	buf = usb_buffer_alloc
#else
	buf = usb_alloc_coherent
#endif
              (dev->udev, writesize, GFP_KERNEL,
				 &urb->transfer_dma);
	if (!buf) {
		retval = -ENOMEM;
		goto error;
	}

	if (copy_from_user(buf, user_buffer, writesize)) {
		retval = -EFAULT;
		goto error;
	}

	/* this lock makes sure we don't submit URBs to gone devices */
	mutex_lock(&dev->io_mutex);
	if (!dev->interface) {		/* disconnect() was called */
		mutex_unlock(&dev->io_mutex);
		retval = -ENODEV;
		goto error;
	}

	/* initialize the urb properly */
	usb_fill_bulk_urb(urb, dev->udev,
			  usb_sndbulkpipe(dev->udev, dev->bulk_out_endpointAddr),
			  buf, writesize, pqlabs_write_bulk_callback, dev);
	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
	usb_anchor_urb(urb, &dev->submitted);

	/* send the data out the bulk port */
	retval = usb_submit_urb(urb, GFP_KERNEL);
	mutex_unlock(&dev->io_mutex);
	if (retval) {
//		err("%s - failed submitting write urb, error %d", __func__, retval);
		goto error_unanchor;
	}

	/*
	 * release our reference to this urb, the USB core will eventually free
	 * it entirely
	 */
	usb_free_urb(urb);


	return writesize;

error_unanchor:
	usb_unanchor_urb(urb);
error:
	if (urb) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
                usb_buffer_free
#else
		usb_free_coherent
#endif
                  (dev->udev, writesize, buf, urb->transfer_dma);
		usb_free_urb(urb);
	}
	up(&dev->limit_sem);

exit:
	return retval;
}

static long pqlabs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
  struct usb_device *udev;
  struct usb_pqlabs *dev;
  int ret, result;
  int len, idx;
  char *buf;
  int i;
  void __user *user_arg = (void __user *)arg;

  ret = 0;
  len = 0;
  dev = (struct usb_pqlabs *)file->private_data;
  udev = dev->udev;

  if (cmd == USB_IOCTL_GET_STRING)
  {
    if (get_user(idx, (int __user *)user_arg))
    {
      printk("pqlabs: get idx failed!\n");
      return -EFAULT; 
    }

    if (udev->state == USB_STATE_SUSPENDED)
      return -EHOSTUNREACH;

    if ((buf = kmalloc(256, GFP_KERNEL)) == NULL) 
      return -ENOMEM;

    for(i = 0; i < 3; i++)
    {
      result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
                               USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
	                       (USB_DT_STRING << 8) + idx, 0x0409, buf, 255,
                               USB_CTRL_GET_TIMEOUT);
      if (result == 0 || result == -EPIPE)
        continue;
      if (result > 1 && ((u8 *)buf)[1] != USB_DT_STRING)
      {
        result = -ENODATA;
        continue;
      }
      break;
    }

    if (result > 0)
    {
      len = buf[0];
      if (copy_to_user(user_arg + sizeof(int), buf, len + 1))
      {
        kfree(buf);
        return -EFAULT;
      }
    }
    kfree(buf);
    return len;
  }
  else if (cmd == USB_IOCTL_CLEAR_FEATURE)
  {
    if (udev->state == USB_STATE_SUSPENDED)
      return -EHOSTUNREACH;

    {
      char dBuf[8];
      result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
                               USB_REQ_CLEAR_FEATURE, USB_TYPE_STANDARD,
	                       0, 0x82, dBuf, 8,
                               USB_CTRL_GET_TIMEOUT);
    }

    
    return result;
    
  }

  return ret;

}

#if defined CONFIG_COMPAT
static long pqlabs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
  unsigned long translated_arg = (unsigned long)compat_ptr(arg);
  return pqlabs_ioctl(file, cmd, translated_arg);
}
#endif

static const struct file_operations pqlabs_fops = {
	.owner =	THIS_MODULE,
	.read =		pqlabs_read,
	.write =	pqlabs_write,
	.open =		pqlabs_open,
	.release =	pqlabs_release,
	.flush =	pqlabs_flush,
  .unlocked_ioctl = pqlabs_ioctl,
#if defined CONFIG_COMPAT
  .compat_ioctl = pqlabs_compat_ioctl,
#endif
};

/*
 * usb class driver info in order to get a minor number from the usb core,
 * and to have the device registered with the driver core
 */
static struct usb_class_driver pqlabs_class = {
	.name =		"pqlabs_bulk%d",
	.fops =		&pqlabs_fops,
	.minor_base =	USB_pqlabs_MINOR_BASE,
};

static int pqlabs_probe(struct usb_interface *interface,
		      const struct usb_device_id *id)
{
	struct usb_pqlabs *dev;
	struct usb_host_interface *iface_desc;
	struct usb_endpoint_descriptor *endpoint;
	size_t buffer_size;
	int i;
	int retval = -ENOMEM;

	/* allocate memory for our device state and initialize it */
	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev) {
		//err("Out of memory");
		goto error;
	}
	kref_init(&dev->kref);
	sema_init(&dev->limit_sem, WRITES_IN_FLIGHT);
	mutex_init(&dev->io_mutex);
	spin_lock_init(&dev->err_lock);
	init_usb_anchor(&dev->submitted);
	init_completion(&dev->bulk_in_completion);

	dev->udev = usb_get_dev(interface_to_usbdev(interface));
	dev->interface = interface;
        dev->disconnecting = false;


	/* set up the endpoint information */
	/* use only the first bulk-in and bulk-out endpoints */
	iface_desc = interface->cur_altsetting;

	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;
		if (!dev->bulk_in_endpointAddr &&
		    usb_endpoint_is_bulk_in(endpoint)) {
			/* we found a bulk in endpoint */
			buffer_size = READ_USB_MAX_LENGTH; //le16_to_cpu(endpoint->wMaxPacketSize);
			dev->bulk_in_size = buffer_size;
			dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
			dev->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
			if (!dev->bulk_in_buffer) {
				//err("Could not allocate bulk_in_buffer");
				goto error;
			}
			dev->bulk_in_urb = usb_alloc_urb(0, GFP_KERNEL);
			if (!dev->bulk_in_urb) {
				//err("Could not allocate bulk_in_urb");
				goto error;
			}
		}

		if (!dev->bulk_out_endpointAddr &&
		    usb_endpoint_is_bulk_out(endpoint)) {
			/* we found a bulk out endpoint */
			dev->bulk_out_endpointAddr = endpoint->bEndpointAddress;
		}
	}

	/* save our data pointer in this interface device */
	usb_set_intfdata(interface, dev);

	/* we can register the device now, as it is ready */
	retval = usb_register_dev(interface, &pqlabs_class);
	if (retval) {
		/* something prevented us from registering this driver */
		//err("Not able to get a minor for this device.");
		usb_set_intfdata(interface, NULL);
		goto error;
	}

	/* let the user know what node this device is now attached to */
	dev_info(&interface->dev,
		 "USB pqlabseton device now attached to USBpqlabs-%d",
		 interface->minor);
	return 0;

error:
	if (dev)
		/* this frees allocated memory */
		kref_put(&dev->kref, pqlabs_delete);
	return retval;
}

static void pqlabs_disconnect(struct usb_interface *interface)
{
	struct usb_pqlabs *dev;
	//int minor = interface->minor;

  dev = usb_get_intfdata(interface);
  dev->disconnecting = true;
	
	mutex_lock(&dev->io_mutex);	
	usb_set_intfdata(interface, NULL);

	/* give back our minor */
	usb_deregister_dev(interface, &pqlabs_class);

	/* prevent more I/O from starting */
 	dev->interface = NULL;
	mutex_unlock(&dev->io_mutex);

	usb_kill_anchored_urbs(&dev->submitted);

	/* decrement our usage count */
	kref_put(&dev->kref, pqlabs_delete);

	//dev_info(&interface->dev, "USB pqlabseton #%d now disconnected", minor);
}

static void pqlabs_draw_down(struct usb_pqlabs *dev)
{
	int time;

	time = usb_wait_anchor_empty_timeout(&dev->submitted, 1000);
	if (!time)
		usb_kill_anchored_urbs(&dev->submitted);
	usb_kill_urb(dev->bulk_in_urb);
}

static int pqlabs_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct usb_pqlabs *dev = usb_get_intfdata(intf);

	if (!dev)
		return 0;
	pqlabs_draw_down(dev);
	return 0;
}

static int pqlabs_resume(struct usb_interface *intf)
{
	return 0;
}

static int pqlabs_pre_reset(struct usb_interface *intf)
{
	struct usb_pqlabs *dev = usb_get_intfdata(intf);

	mutex_lock(&dev->io_mutex);
	pqlabs_draw_down(dev);

	return 0;
}

static int pqlabs_post_reset(struct usb_interface *intf)
{
	struct usb_pqlabs *dev = usb_get_intfdata(intf);

	/* we are sure no URBs are active - no locking needed */
	dev->errors = -EPIPE;
	mutex_unlock(&dev->io_mutex);

	return 0;
}

static struct usb_driver pqlabs_driver = {
	.name =		"pqlabs_bulk",
	.probe =	pqlabs_probe,
	.disconnect =	pqlabs_disconnect,
	.suspend =	pqlabs_suspend,
	.resume =	pqlabs_resume,
	.pre_reset =	pqlabs_pre_reset,
	.post_reset =	pqlabs_post_reset,
	.id_table =	pqlabs_table,
	.supports_autosuspend = 1,
};

#define CUR_DRIVER_VERSION		"14.07.01"

static int __init usb_pqlabs_init(void)
{
	int result;

	/* register this driver with the USB subsystem */
	result = usb_register(&pqlabs_driver);
	//if (result)
		//printk("usb_register failed. Error number %d", result);

  printk("Version: %s\n", CUR_DRIVER_VERSION);
	return result;
}

static void __exit usb_pqlabs_exit(void)
{
	/* deregister this driver with the USB subsystem */
	usb_deregister(&pqlabs_driver);
}

module_init(usb_pqlabs_init);
module_exit(usb_pqlabs_exit);

MODULE_LICENSE("GPL");

