H Hartley Sweeten | abac8b5 | 2013-01-30 15:21:49 -0700 | [diff] [blame^] | 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 | */ |
| 31 | struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev) |
| 32 | { |
| 33 | return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL; |
| 34 | } |
| 35 | EXPORT_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 | * |
| 42 | * Typically called from the usb_driver (*probe) function. |
| 43 | */ |
| 44 | int comedi_usb_auto_config(struct usb_interface *intf, |
| 45 | struct comedi_driver *driver) |
| 46 | { |
| 47 | return comedi_auto_config(&intf->dev, driver, 0); |
| 48 | } |
| 49 | EXPORT_SYMBOL_GPL(comedi_usb_auto_config); |
| 50 | |
| 51 | /** |
| 52 | * comedi_pci_auto_unconfig() - Unconfigure/disconnect a comedi USB driver. |
| 53 | * @intf: usb_interface struct |
| 54 | * |
| 55 | * Typically called from the usb_driver (*disconnect) function. |
| 56 | */ |
| 57 | void comedi_usb_auto_unconfig(struct usb_interface *intf) |
| 58 | { |
| 59 | comedi_auto_unconfig(&intf->dev); |
| 60 | } |
| 61 | EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig); |
| 62 | |
| 63 | /** |
| 64 | * comedi_usb_driver_register() - Register a comedi USB driver. |
| 65 | * @comedi_driver: comedi_driver struct |
| 66 | * @usb_driver: usb_driver struct |
| 67 | * |
| 68 | * This function is used for the module_init() of comedi USB drivers. |
| 69 | * Do not call it directly, use the module_comedi_usb_driver() helper |
| 70 | * macro instead. |
| 71 | */ |
| 72 | int comedi_usb_driver_register(struct comedi_driver *comedi_driver, |
| 73 | struct usb_driver *usb_driver) |
| 74 | { |
| 75 | int ret; |
| 76 | |
| 77 | ret = comedi_driver_register(comedi_driver); |
| 78 | if (ret < 0) |
| 79 | return ret; |
| 80 | |
| 81 | ret = usb_register(usb_driver); |
| 82 | if (ret < 0) { |
| 83 | comedi_driver_unregister(comedi_driver); |
| 84 | return ret; |
| 85 | } |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | EXPORT_SYMBOL_GPL(comedi_usb_driver_register); |
| 90 | |
| 91 | /** |
| 92 | * comedi_usb_driver_unregister() - Unregister a comedi USB driver. |
| 93 | * @comedi_driver: comedi_driver struct |
| 94 | * @usb_driver: usb_driver struct |
| 95 | * |
| 96 | * This function is used for the module_exit() of comedi USB drivers. |
| 97 | * Do not call it directly, use the module_comedi_usb_driver() helper |
| 98 | * macro instead. |
| 99 | */ |
| 100 | void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver, |
| 101 | struct usb_driver *usb_driver) |
| 102 | { |
| 103 | usb_deregister(usb_driver); |
| 104 | comedi_driver_unregister(comedi_driver); |
| 105 | } |
| 106 | EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister); |