LXR linux/drivers/staging/comedi/comedi

   1/*
   2 * comedi_usb.c
   3 * Comedi USB driver specific functions.
   4 *
   5 * COMEDI - Linux Control and Measurement Device Interface
   6 * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23#include <linux/usb.h>
  24
  25#include "comedidev.h"
  26
  27/**
  28 * comedi_to_usb_interface() - comedi_device pointer to usb_interface pointer.
  29 * @dev: comedi_device struct
  30 */
  31struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev)
  32{
  33        return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL;
  34}
  35EXPORT_SYMBOL_GPL(comedi_to_usb_interface);
  36
  37/**
  38 * comedi_usb_auto_config() - Configure/probe a comedi USB driver.
  39 * @intf: usb_interface struct
  40 * @driver: comedi_driver struct
  41 * @context: driver specific data, passed to comedi_auto_config()
  42 *
  43 * Typically called from the usb_driver (*probe) function.
  44 */
  45int comedi_usb_auto_config(struct usb_interface *intf,
  46                           struct comedi_driver *driver,
  47                           unsigned long context)
  48{
  49        return comedi_auto_config(&intf->dev, driver, context);
  50}
  51EXPORT_SYMBOL_GPL(comedi_usb_auto_config);
  52
  53/**
  54 * comedi_pci_auto_unconfig() - Unconfigure/disconnect a comedi USB driver.
  55 * @intf: usb_interface struct
  56 *
  57 * Typically called from the usb_driver (*disconnect) function.
  58 */
  59void comedi_usb_auto_unconfig(struct usb_interface *intf)
  60{
  61        comedi_auto_unconfig(&intf->dev);
  62}
  63EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig);
  64
  65/**
  66 * comedi_usb_driver_register() - Register a comedi USB driver.
  67 * @comedi_driver: comedi_driver struct
  68 * @usb_driver: usb_driver struct
  69 *
  70 * This function is used for the module_init() of comedi USB drivers.
  71 * Do not call it directly, use the module_comedi_usb_driver() helper
  72 * macro instead.
  73 */
  74int comedi_usb_driver_register(struct comedi_driver *comedi_driver,
  75                               struct usb_driver *usb_driver)
  76{
  77        int ret;
  78
  79        ret = comedi_driver_register(comedi_driver);
  80        if (ret < 0)
  81                return ret;
  82
  83        ret = usb_register(usb_driver);
  84        if (ret < 0) {
  85                comedi_driver_unregister(comedi_driver);
  86                return ret;
  87        }
  88
  89        return 0;
  90}
  91EXPORT_SYMBOL_GPL(comedi_usb_driver_register);
  92
  93/**
  94 * comedi_usb_driver_unregister() - Unregister a comedi USB driver.
  95 * @comedi_driver: comedi_driver struct
  96 * @usb_driver: usb_driver struct
  97 *
  98 * This function is used for the module_exit() of comedi USB drivers.
  99 * Do not call it directly, use the module_comedi_usb_driver() helper
 100 * macro instead.
 101 */
 102void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver,
 103                                  struct usb_driver *usb_driver)
 104{
 105        usb_deregister(usb_driver);
 106        comedi_driver_unregister(comedi_driver);
 107}
 108EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);
 109