1 /* $FreeBSD: head/sys/dev/usb/usb_dynamic.c 250207 2013-05-03 11:10:04Z hselasky $ */
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 #include <sys/stdint.h>
28 #include <sys/param.h>
29 #include <sys/queue.h>
30 #include <sys/types.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/bus.h>
34 #include <sys/module.h>
35 #include <sys/lock.h>
36 #include <sys/condvar.h>
37 #include <sys/sysctl.h>
38 #include <sys/unistd.h>
39 #include <sys/callout.h>
40 #include <sys/malloc.h>
41 #include <sys/caps.h>
42
43 #include <bus/u4b/usb.h>
44 #include <bus/u4b/usbdi.h>
45
46 #include <bus/u4b/usb_core.h>
47 #include <bus/u4b/usb_process.h>
48 #include <bus/u4b/usb_device.h>
49 #include <bus/u4b/usb_dynamic.h>
50 #include <bus/u4b/usb_request.h>
51
52 /* function prototypes */
53 static usb_handle_req_t usb_temp_get_desc_w;
54 static usb_temp_setup_by_index_t usb_temp_setup_by_index_w;
55 static usb_temp_unsetup_t usb_temp_unsetup_w;
56 static usb_test_quirk_t usb_test_quirk_w;
57 static usb_quirk_ioctl_t usb_quirk_ioctl_w;
58
59 /* global variables */
60 usb_handle_req_t *usb_temp_get_desc_p = &usb_temp_get_desc_w;
61 usb_temp_setup_by_index_t *usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
62 usb_temp_unsetup_t *usb_temp_unsetup_p = &usb_temp_unsetup_w;
63 usb_test_quirk_t *usb_test_quirk_p = &usb_test_quirk_w;
64 usb_quirk_ioctl_t *usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
65 devclass_t usb_devclass_ptr = NULL;
66
67 static usb_error_t
usb_temp_setup_by_index_w(struct usb_device * udev,uint16_t index)68 usb_temp_setup_by_index_w(struct usb_device *udev, uint16_t index)
69 {
70 return (USB_ERR_INVAL);
71 }
72
73 static uint8_t
usb_test_quirk_w(const struct usbd_lookup_info * info,uint16_t quirk)74 usb_test_quirk_w(const struct usbd_lookup_info *info, uint16_t quirk)
75 {
76 return (0); /* no match */
77 }
78
79 static int
usb_quirk_ioctl_w(unsigned long cmd,caddr_t data,int fflag,struct thread * td)80 usb_quirk_ioctl_w(unsigned long cmd, caddr_t data, int fflag, struct thread *td)
81 {
82 return (ENOIOCTL);
83 }
84
85 static usb_error_t
usb_temp_get_desc_w(struct usb_device * udev,struct usb_device_request * req,const void ** pPtr,uint16_t * pLength)86 usb_temp_get_desc_w(struct usb_device *udev, struct usb_device_request *req, const void **pPtr, uint16_t *pLength)
87 {
88 /* stall */
89 return (USB_ERR_STALLED);
90 }
91
92 static void
usb_temp_unsetup_w(struct usb_device * udev)93 usb_temp_unsetup_w(struct usb_device *udev)
94 {
95 if(udev->usb_template_ptr) {
96 usbd_free_config_desc(udev, udev->usb_template_ptr);
97 udev->usb_template_ptr = NULL;
98 }
99 }
100
101 void
usb_quirk_unload(void * arg)102 usb_quirk_unload(void *arg)
103 {
104 /* reset function pointers */
105
106 usb_test_quirk_p = &usb_test_quirk_w;
107 usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
108
109 /* wait for CPU to exit the loaded functions, if any */
110
111 /* XXX this is a tradeoff */
112
113 tsleep(usb_quirk_unload, 0, "WAIT", hz);
114 }
115
116 void
usb_temp_unload(void * arg)117 usb_temp_unload(void *arg)
118 {
119 /* reset function pointers */
120
121 usb_temp_get_desc_p = &usb_temp_get_desc_w;
122 usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
123 usb_temp_unsetup_p = &usb_temp_unsetup_w;
124
125 /* wait for CPU to exit the loaded functions, if any */
126
127 /* XXX this is a tradeoff */
128
129 tsleep(usb_quirk_unload, 0, "WAIT", hz);
130 }
131
132 void
usb_bus_unload(void * arg)133 usb_bus_unload(void *arg)
134 {
135 /* reset function pointers */
136
137 usb_devclass_ptr = NULL;
138
139 /* wait for CPU to exit the loaded functions, if any */
140
141 /* XXX this is a tradeoff */
142
143 tsleep(usb_quirk_unload, 0, "WAIT", hz);
144 }
145