xref: /freebsd/sys/dev/usb/usb_dynamic.c (revision d2ce15bd43b3a1dcce08eecbff8d5d359946d972)
1 /* $FreeBSD$ */
2 /*-
3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #ifdef USB_GLOBAL_INCLUDE_FILE
28 #include USB_GLOBAL_INCLUDE_FILE
29 #else
30 #include <sys/stdint.h>
31 #include <sys/stddef.h>
32 #include <sys/param.h>
33 #include <sys/queue.h>
34 #include <sys/types.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/bus.h>
38 #include <sys/module.h>
39 #include <sys/lock.h>
40 #include <sys/mutex.h>
41 #include <sys/condvar.h>
42 #include <sys/sysctl.h>
43 #include <sys/sx.h>
44 #include <sys/unistd.h>
45 #include <sys/callout.h>
46 #include <sys/malloc.h>
47 #include <sys/priv.h>
48 
49 #include <dev/usb/usb.h>
50 #include <dev/usb/usbdi.h>
51 
52 #include <dev/usb/usb_core.h>
53 #include <dev/usb/usb_process.h>
54 #include <dev/usb/usb_device.h>
55 #include <dev/usb/usb_dynamic.h>
56 #endif			/* USB_GLOBAL_INCLUDE_FILE */
57 
58 /* function prototypes */
59 static usb_handle_req_t usb_temp_get_desc_w;
60 static usb_temp_setup_by_index_t usb_temp_setup_by_index_w;
61 static usb_temp_unsetup_t usb_temp_unsetup_w;
62 static usb_test_quirk_t usb_test_quirk_w;
63 static usb_quirk_ioctl_t usb_quirk_ioctl_w;
64 
65 /* global variables */
66 usb_handle_req_t *usb_temp_get_desc_p = &usb_temp_get_desc_w;
67 usb_temp_setup_by_index_t *usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
68 usb_temp_unsetup_t *usb_temp_unsetup_p = &usb_temp_unsetup_w;
69 usb_test_quirk_t *usb_test_quirk_p = &usb_test_quirk_w;
70 usb_quirk_ioctl_t *usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
71 devclass_t usb_devclass_ptr;
72 
73 static usb_error_t
74 usb_temp_setup_by_index_w(struct usb_device *udev, uint16_t index)
75 {
76 	return (USB_ERR_INVAL);
77 }
78 
79 static uint8_t
80 usb_test_quirk_w(const struct usbd_lookup_info *info, uint16_t quirk)
81 {
82 	return (0);			/* no match */
83 }
84 
85 static int
86 usb_quirk_ioctl_w(unsigned long cmd, caddr_t data, int fflag, struct thread *td)
87 {
88 	return (ENOIOCTL);
89 }
90 
91 static usb_error_t
92 usb_temp_get_desc_w(struct usb_device *udev, struct usb_device_request *req, const void **pPtr, uint16_t *pLength)
93 {
94 	/* stall */
95 	return (USB_ERR_STALLED);
96 }
97 
98 static void
99 usb_temp_unsetup_w(struct usb_device *udev)
100 {
101 	if (udev->usb_template_ptr) {
102 
103 		free(udev->usb_template_ptr, M_USB);
104 
105 		udev->usb_template_ptr = NULL;
106 	}
107 }
108 
109 void
110 usb_quirk_unload(void *arg)
111 {
112 	/* reset function pointers */
113 
114 	usb_test_quirk_p = &usb_test_quirk_w;
115 	usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
116 
117 	/* wait for CPU to exit the loaded functions, if any */
118 
119 	/* XXX this is a tradeoff */
120 
121 	pause("WAIT", hz);
122 }
123 
124 void
125 usb_temp_unload(void *arg)
126 {
127 	/* reset function pointers */
128 
129 	usb_temp_get_desc_p = &usb_temp_get_desc_w;
130 	usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
131 	usb_temp_unsetup_p = &usb_temp_unsetup_w;
132 
133 	/* wait for CPU to exit the loaded functions, if any */
134 
135 	/* XXX this is a tradeoff */
136 
137 	pause("WAIT", hz);
138 }
139 
140 void
141 usb_bus_unload(void *arg)
142 {
143 	/* reset function pointers */
144 
145 	usb_devclass_ptr = NULL;
146 
147 	/* wait for CPU to exit the loaded functions, if any */
148 
149 	/* XXX this is a tradeoff */
150 
151 	pause("WAIT", hz);
152 }
153