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 */
comedi_to_usb_interface(struct comedi_device * dev)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 * @context: driver specific data, passed to comedi_auto_config()
42 *
43 * Typically called from the usb_driver (*probe) function.
44 */
comedi_usb_auto_config(struct usb_interface * intf,struct comedi_driver * driver,unsigned long context)45 int 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 }
51 EXPORT_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 */
comedi_usb_auto_unconfig(struct usb_interface * intf)59 void comedi_usb_auto_unconfig(struct usb_interface *intf)
60 {
61 comedi_auto_unconfig(&intf->dev);
62 }
63 EXPORT_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 */
comedi_usb_driver_register(struct comedi_driver * comedi_driver,struct usb_driver * usb_driver)74 int 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 }
91 EXPORT_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 */
comedi_usb_driver_unregister(struct comedi_driver * comedi_driver,struct usb_driver * usb_driver)102 void 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 }
108 EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);
109