1 /*
2 * Copyright (C) 2015-2016 Samsung Electronics
3 * Igor Kotrasinski <i.kotrasinsk@samsung.com>
4 * Krzysztof Opasiak <k.opasiak@samsung.com>
5 *
6 * Refactored from usbip_host_driver.c, which is:
7 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
8 * 2005-2007 Takahiro Hirofuchi
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #ifndef __USBIP_HOST_COMMON_H
25 #define __USBIP_HOST_COMMON_H
26
27 #include <stdint.h>
28 #include <libudev.h>
29 #include <errno.h>
30 #include "list.h"
31 #include "usbip_common.h"
32 #include "sysfs_utils.h"
33
34 struct usbip_host_driver;
35
36 struct usbip_host_driver_ops {
37 int (*open)(struct usbip_host_driver *hdriver);
38 void (*close)(struct usbip_host_driver *hdriver);
39 int (*refresh_device_list)(struct usbip_host_driver *hdriver);
40 struct usbip_exported_device * (*get_device)(
41 struct usbip_host_driver *hdriver, int num);
42
43 int (*read_device)(struct udev_device *sdev,
44 struct usbip_usb_device *dev);
45 int (*read_interface)(struct usbip_usb_device *udev, int i,
46 struct usbip_usb_interface *uinf);
47 int (*is_my_device)(struct udev_device *udev);
48 };
49
50 struct usbip_host_driver {
51 int ndevs;
52 /* list of exported device */
53 struct list_head edev_list;
54 const char *udev_subsystem;
55 struct usbip_host_driver_ops ops;
56 };
57
58 struct usbip_exported_device {
59 struct udev_device *sudev;
60 int32_t status;
61 struct usbip_usb_device udev;
62 struct list_head node;
63 struct usbip_usb_interface uinf[];
64 };
65
66 /* External API to access the driver */
usbip_driver_open(struct usbip_host_driver * hdriver)67 static inline int usbip_driver_open(struct usbip_host_driver *hdriver)
68 {
69 if (!hdriver->ops.open)
70 return -EOPNOTSUPP;
71 return hdriver->ops.open(hdriver);
72 }
73
usbip_driver_close(struct usbip_host_driver * hdriver)74 static inline void usbip_driver_close(struct usbip_host_driver *hdriver)
75 {
76 if (!hdriver->ops.close)
77 return;
78 hdriver->ops.close(hdriver);
79 }
80
usbip_refresh_device_list(struct usbip_host_driver * hdriver)81 static inline int usbip_refresh_device_list(struct usbip_host_driver *hdriver)
82 {
83 if (!hdriver->ops.refresh_device_list)
84 return -EOPNOTSUPP;
85 return hdriver->ops.refresh_device_list(hdriver);
86 }
87
88 static inline struct usbip_exported_device *
usbip_get_device(struct usbip_host_driver * hdriver,int num)89 usbip_get_device(struct usbip_host_driver *hdriver, int num)
90 {
91 if (!hdriver->ops.get_device)
92 return NULL;
93 return hdriver->ops.get_device(hdriver, num);
94 }
95
96 /* Helper functions for implementing driver backend */
97 int usbip_generic_driver_open(struct usbip_host_driver *hdriver);
98 void usbip_generic_driver_close(struct usbip_host_driver *hdriver);
99 int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver);
100 int usbip_export_device(struct usbip_exported_device *edev, int sockfd);
101 struct usbip_exported_device *usbip_generic_get_device(
102 struct usbip_host_driver *hdriver, int num);
103
104 #endif /* __USBIP_HOST_COMMON_H */
105