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/*
* comedi_usb.c
* Comedi USB driver specific functions.
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/usb.h>
#include "comedidev.h"
/**
* comedi_to_usb_interface() - comedi_device pointer to usb_interface pointer.
* @dev: comedi_device struct
*/
struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev)
{
return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL;
}
EXPORT_SYMBOL_GPL(comedi_to_usb_interface);
/**
* comedi_to_usb_dev() - comedi_device pointer to usb_device pointer.
* @dev: comedi_device struct
*/
struct usb_device *comedi_to_usb_dev(struct comedi_device *dev)
{
struct usb_interface *intf = comedi_to_usb_interface(dev);
return intf ? interface_to_usbdev(intf) : NULL;
}
EXPORT_SYMBOL_GPL(comedi_to_usb_dev);
/**
* comedi_usb_auto_config() - Configure/probe a comedi USB driver.
* @intf: usb_interface struct
* @driver: comedi_driver struct
* @context: driver specific data, passed to comedi_auto_config()
*
* Typically called from the usb_driver (*probe) function.
*/
int comedi_usb_auto_config(struct usb_interface *intf,
struct comedi_driver *driver,
unsigned long context)
{
return comedi_auto_config(&intf->dev, driver, context);
}
EXPORT_SYMBOL_GPL(comedi_usb_auto_config);
/**
* comedi_pci_auto_unconfig() - Unconfigure/disconnect a comedi USB driver.
* @intf: usb_interface struct
*
* Typically called from the usb_driver (*disconnect) function.
*/
void comedi_usb_auto_unconfig(struct usb_interface *intf)
{
comedi_auto_unconfig(&intf->dev);
}
EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig);
/**
* comedi_usb_driver_register() - Register a comedi USB driver.
* @comedi_driver: comedi_driver struct
* @usb_driver: usb_driver struct
*
* This function is used for the module_init() of comedi USB drivers.
* Do not call it directly, use the module_comedi_usb_driver() helper
* macro instead.
*/
int comedi_usb_driver_register(struct comedi_driver *comedi_driver,
struct usb_driver *usb_driver)
{
int ret;
ret = comedi_driver_register(comedi_driver);
if (ret < 0)
return ret;
ret = usb_register(usb_driver);
if (ret < 0) {
comedi_driver_unregister(comedi_driver);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(comedi_usb_driver_register);
/**
* comedi_usb_driver_unregister() - Unregister a comedi USB driver.
* @comedi_driver: comedi_driver struct
* @usb_driver: usb_driver struct
*
* This function is used for the module_exit() of comedi USB drivers.
* Do not call it directly, use the module_comedi_usb_driver() helper
* macro instead.
*/
void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver,
struct usb_driver *usb_driver)
{
usb_deregister(usb_driver);
comedi_driver_unregister(comedi_driver);
}
EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);
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