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61dd149b10
Introduce a helper function to get a usb_device pointer from a comedi_device pointer. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
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* comedi_usb.c
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* Comedi USB driver specific functions.
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/usb.h>
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#include "comedidev.h"
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/**
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* comedi_to_usb_interface() - comedi_device pointer to usb_interface pointer.
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* @dev: comedi_device struct
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*/
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struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev)
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{
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return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL;
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}
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EXPORT_SYMBOL_GPL(comedi_to_usb_interface);
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/**
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* comedi_to_usb_dev() - comedi_device pointer to usb_device pointer.
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* @dev: comedi_device struct
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*/
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struct usb_device *comedi_to_usb_dev(struct comedi_device *dev)
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{
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struct usb_interface *intf = comedi_to_usb_interface(dev);
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return intf ? interface_to_usbdev(intf) : NULL;
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}
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EXPORT_SYMBOL_GPL(comedi_to_usb_dev);
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/**
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* comedi_usb_auto_config() - Configure/probe a comedi USB driver.
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* @intf: usb_interface struct
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* @driver: comedi_driver struct
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* @context: driver specific data, passed to comedi_auto_config()
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*
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* Typically called from the usb_driver (*probe) function.
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*/
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int comedi_usb_auto_config(struct usb_interface *intf,
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struct comedi_driver *driver,
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unsigned long context)
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{
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return comedi_auto_config(&intf->dev, driver, context);
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}
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EXPORT_SYMBOL_GPL(comedi_usb_auto_config);
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/**
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* comedi_pci_auto_unconfig() - Unconfigure/disconnect a comedi USB driver.
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* @intf: usb_interface struct
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*
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* Typically called from the usb_driver (*disconnect) function.
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*/
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void comedi_usb_auto_unconfig(struct usb_interface *intf)
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{
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comedi_auto_unconfig(&intf->dev);
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}
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EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig);
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/**
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* comedi_usb_driver_register() - Register a comedi USB driver.
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* @comedi_driver: comedi_driver struct
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* @usb_driver: usb_driver struct
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*
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* This function is used for the module_init() of comedi USB drivers.
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* Do not call it directly, use the module_comedi_usb_driver() helper
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* macro instead.
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*/
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int comedi_usb_driver_register(struct comedi_driver *comedi_driver,
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struct usb_driver *usb_driver)
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{
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int ret;
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ret = comedi_driver_register(comedi_driver);
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if (ret < 0)
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return ret;
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ret = usb_register(usb_driver);
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if (ret < 0) {
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comedi_driver_unregister(comedi_driver);
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(comedi_usb_driver_register);
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/**
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* comedi_usb_driver_unregister() - Unregister a comedi USB driver.
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* @comedi_driver: comedi_driver struct
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* @usb_driver: usb_driver struct
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*
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* This function is used for the module_exit() of comedi USB drivers.
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* Do not call it directly, use the module_comedi_usb_driver() helper
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* macro instead.
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*/
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void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver,
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struct usb_driver *usb_driver)
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{
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usb_deregister(usb_driver);
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comedi_driver_unregister(comedi_driver);
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}
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EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);
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