2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2008-2022 Hans Petter Selasky
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #ifdef USB_GLOBAL_INCLUDE_FILE
29 #include USB_GLOBAL_INCLUDE_FILE
31 #include <sys/stdint.h>
32 #include <sys/stddef.h>
33 #include <sys/param.h>
34 #include <sys/queue.h>
35 #include <sys/types.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
39 #include <sys/module.h>
41 #include <sys/mutex.h>
42 #include <sys/condvar.h>
43 #include <sys/sysctl.h>
45 #include <sys/unistd.h>
46 #include <sys/callout.h>
47 #include <sys/malloc.h>
50 #include <dev/usb/usb.h>
51 #include <dev/usb/usbdi.h>
52 #include <dev/usb/usbdi_util.h>
54 #include <dev/usb/usb_core.h>
55 #include <dev/usb/usb_util.h>
56 #include <dev/usb/usb_process.h>
57 #include <dev/usb/usb_device.h>
58 #include <dev/usb/usb_request.h>
59 #include <dev/usb/usb_busdma.h>
61 #include <dev/usb/usb_controller.h>
62 #include <dev/usb/usb_bus.h>
63 #endif /* USB_GLOBAL_INCLUDE_FILE */
65 /*------------------------------------------------------------------------*
68 * This function can be called at probe or attach to set the USB
69 * device supplied textual description for the given device.
70 *------------------------------------------------------------------------*/
72 device_set_usb_desc(device_t dev)
74 struct usb_attach_arg *uaa;
75 struct usb_device *udev;
76 struct usb_interface *iface;
82 /* should not happen */
85 uaa = device_get_ivars(dev);
87 /* can happen if called at the wrong time */
93 if ((iface == NULL) ||
94 (iface->idesc == NULL) ||
95 (iface->idesc->iInterface == 0)) {
101 /* Protect scratch area */
102 do_unlock = usbd_ctrl_lock(udev);
104 temp_p = (char *)udev->scratch.data;
107 /* try to get the interface string ! */
108 err = usbd_req_get_string_any(udev, NULL, temp_p,
109 sizeof(udev->scratch.data),
110 iface->idesc->iInterface);
113 /* use default description */
114 usb_devinfo(udev, temp_p,
115 sizeof(udev->scratch.data));
119 usbd_ctrl_unlock(udev);
121 device_set_desc_copy(dev, temp_p);
122 device_printf(dev, "<%s> on %s\n", temp_p,
123 device_get_nameunit(udev->bus->bdev));
126 /*------------------------------------------------------------------------*
127 * usb_pause_mtx - factored out code
129 * This function will delay the code by the passed number of system
130 * ticks. The passed mutex "mtx" will be dropped while waiting, if
131 * "mtx" is different from NULL.
132 *------------------------------------------------------------------------*/
134 usb_pause_mtx(struct mtx *mtx, int timo)
140 * Add one tick to the timeout so that we don't return too
141 * early! Note that pause() will assert that the passed
142 * timeout is positive and non-zero!
144 pause("USBWAIT", timo + 1);
150 /*------------------------------------------------------------------------*
153 * This function will print the version number "bcd" to the string
154 * pointed to by "p" having a maximum length of "p_len" bytes
155 * including the terminating zero.
156 *------------------------------------------------------------------------*/
158 usb_printbcd(char *p, uint16_t p_len, uint16_t bcd)
160 if (snprintf(p, p_len, "%x.%02x", bcd >> 8, bcd & 0xff)) {
161 /* ignore any errors */
165 /*------------------------------------------------------------------------*
168 * This function removes spaces at the beginning and the end of the string
169 * pointed to by the "p" argument.
170 *------------------------------------------------------------------------*/
172 usb_trim_spaces(char *p)
180 while (*q == ' ') /* skip leading spaces */
182 while ((*p = *q++)) /* copy string */
183 if (*p++ != ' ') /* remember last non-space */
185 *e = 0; /* kill trailing spaces */
188 /*------------------------------------------------------------------------*
189 * usb_make_str_desc - convert an ASCII string into a UNICODE string
190 *------------------------------------------------------------------------*/
192 usb_make_str_desc(void *ptr, uint16_t max_len, const char *s)
194 struct usb_string_descriptor *p = ptr;
202 max_len = ((max_len / 2) - 1);
215 totlen = (max_len + 1) * 2;
218 p->bDescriptorType = UDESC_STRING;
221 USETW2(p->bString[max_len], 0, s[max_len]);
226 /*------------------------------------------------------------------------*
227 * usb_check_request - prevent damaging USB requests
232 *------------------------------------------------------------------------*/
235 usb_check_request(struct usb_device *udev, struct usb_device_request *req)
237 struct usb_endpoint *ep;
241 * Avoid requests that would damage the bus integrity:
243 if (((req->bmRequestType == UT_WRITE_DEVICE) &&
244 (req->bRequest == UR_SET_ADDRESS)) ||
245 ((req->bmRequestType == UT_WRITE_DEVICE) &&
246 (req->bRequest == UR_SET_CONFIG)) ||
247 ((req->bmRequestType == UT_WRITE_INTERFACE) &&
248 (req->bRequest == UR_SET_INTERFACE))) {
250 * These requests can be useful for testing USB drivers.
252 error = priv_check(curthread, PRIV_DRIVER);
258 * Special case - handle clearing of stall
260 if (req->bmRequestType == UT_WRITE_ENDPOINT) {
261 ep = usbd_get_ep_by_addr(udev, req->wIndex[0]);
264 if ((req->bRequest == UR_CLEAR_FEATURE) &&
265 (UGETW(req->wValue) == UF_ENDPOINT_HALT))
266 usbd_clear_data_toggle(udev, ep);
269 /* TODO: add more checks to verify the interface index */