1 /* $FreeBSD: releng/12.2/sys/dev/usb/usb_dynamic.c 326255 2017-11-27 14:52:40Z pfg $ */
2 /*-
3 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 *
5 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "implementation/global_implementation.h"
30
31 /* function prototypes */
32 static usb_handle_req_t usb_temp_get_desc_w;
33 static usb_temp_setup_by_index_t usb_temp_setup_by_index_w;
34 static usb_temp_unsetup_t usb_temp_unsetup_w;
35 static usb_test_quirk_t usb_test_quirk_w;
36 static usb_quirk_ioctl_t usb_quirk_ioctl_w;
37
38 /* global variables */
39 usb_handle_req_t *usb_temp_get_desc_p = &usb_temp_get_desc_w;
40 usb_temp_setup_by_index_t *usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
41 usb_temp_unsetup_t *usb_temp_unsetup_p = &usb_temp_unsetup_w;
42 usb_test_quirk_t *usb_test_quirk_p = &usb_test_quirk_w;
43 usb_quirk_ioctl_t *usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
44 devclass_t usb_devclass_ptr;
45
46 static usb_error_t
usb_temp_setup_by_index_w(struct usb_device * udev,uint16_t index)47 usb_temp_setup_by_index_w(struct usb_device *udev, uint16_t index)
48 {
49 return (USB_ERR_INVAL);
50 }
51
52 static uint8_t
usb_test_quirk_w(const struct usbd_lookup_info * info,uint16_t quirk)53 usb_test_quirk_w(const struct usbd_lookup_info *info, uint16_t quirk)
54 {
55 return (0); /* no match */
56 }
57
58 static int
usb_quirk_ioctl_w(unsigned long cmd,caddr_t data,int fflag,struct thread * td)59 usb_quirk_ioctl_w(unsigned long cmd, caddr_t data, int fflag, struct thread *td)
60 {
61 return (ENOIOCTL);
62 }
63
64 static usb_error_t
usb_temp_get_desc_w(struct usb_device * udev,struct usb_device_request * req,const void ** pPtr,uint16_t * pLength)65 usb_temp_get_desc_w(struct usb_device *udev, struct usb_device_request *req, const void **pPtr, uint16_t *pLength)
66 {
67 /* stall */
68 return (USB_ERR_STALLED);
69 }
70
71 static void
usb_temp_unsetup_w(struct usb_device * udev)72 usb_temp_unsetup_w(struct usb_device *udev)
73 {
74 usbd_free_config_desc(udev, udev->usb_template_ptr);
75 udev->usb_template_ptr = NULL;
76 }
77
78 void
usb_quirk_unload(void * arg)79 usb_quirk_unload(void *arg)
80 {
81 /* reset function pointers */
82
83 usb_test_quirk_p = &usb_test_quirk_w;
84 usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
85
86 /* wait for CPU to exit the loaded functions, if any */
87
88 /* XXX this is a tradeoff */
89
90 pause("WAIT", hz);
91 }
92
93 void
usb_temp_unload(void * arg)94 usb_temp_unload(void *arg)
95 {
96 /* reset function pointers */
97
98 usb_temp_get_desc_p = &usb_temp_get_desc_w;
99 usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
100 usb_temp_unsetup_p = &usb_temp_unsetup_w;
101
102 /* wait for CPU to exit the loaded functions, if any */
103
104 /* XXX this is a tradeoff */
105
106 pause("WAIT", hz);
107 }
108
109 void
usb_bus_unload(void * arg)110 usb_bus_unload(void *arg)
111 {
112 /* reset function pointers */
113
114 usb_devclass_ptr = NULL;
115
116 /* wait for CPU to exit the loaded functions, if any */
117
118 /* XXX this is a tradeoff */
119
120 pause("WAIT", hz);
121 }
122