3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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>
34 #include <sys/module.h>
36 #include <sys/mutex.h>
37 #include <sys/condvar.h>
38 #include <sys/sysctl.h>
39 #include <sys/unistd.h>
40 #include <sys/callout.h>
41 #include <sys/malloc.h>
44 #include <bus/u4b/usb.h>
45 #include <bus/u4b/usbdi.h>
46 #include <bus/u4b/usbdi_util.h>
48 #include <bus/u4b/usb_core.h>
49 #include <bus/u4b/usb_util.h>
50 #include <bus/u4b/usb_process.h>
51 #include <bus/u4b/usb_device.h>
52 #include <bus/u4b/usb_request.h>
53 #include <bus/u4b/usb_busdma.h>
55 #include <bus/u4b/usb_controller.h>
56 #include <bus/u4b/usb_bus.h>
58 /*------------------------------------------------------------------------*
61 * This function can be called at probe or attach to set the USB
62 * device supplied textual description for the given device.
63 *------------------------------------------------------------------------*/
65 device_set_usb_desc(device_t dev)
67 struct usb_attach_arg *uaa;
68 struct usb_device *udev;
69 struct usb_interface *iface;
75 /* should not happen */
78 uaa = device_get_ivars(dev);
80 /* can happen if called at the wrong time */
86 if ((iface == NULL) ||
87 (iface->idesc == NULL) ||
88 (iface->idesc->iInterface == 0)) {
94 /* Protect scratch area */
95 do_unlock = usbd_enum_lock(udev);
97 temp_p = (char *)udev->scratch.data;
100 /* try to get the interface string ! */
101 err = usbd_req_get_string_any(udev, NULL, temp_p,
102 sizeof(udev->scratch.data),
103 iface->idesc->iInterface);
106 /* use default description */
107 usb_devinfo(udev, temp_p,
108 sizeof(udev->scratch.data));
112 usbd_enum_unlock(udev);
114 device_set_desc_copy(dev, temp_p);
115 device_printf(dev, "<%s> on %s\n", temp_p,
116 device_get_nameunit(udev->bus->bdev));
119 /*------------------------------------------------------------------------*
120 * usb_pause_mtx - factored out code
122 * This function will delay the code by the passed number of system
123 * ticks. The passed mutex "mtx" will be dropped while waiting, if
124 * "mtx" is different from NULL.
125 *------------------------------------------------------------------------*/
127 usb_pause_mtx(struct lock *lock, int timo)
130 * Add one tick to the timeout so that we don't return too
131 * early! Note that pause() will assert that the passed
132 * timeout is positive and non-zero!
135 lksleep(&usb_pause_mtx, lock, 0, "USBSLP", timo + 1);
137 KKASSERT(timo + 1 > 0);
138 tsleep(&usb_pause_mtx, 0, "USBSLP", timo + 1);
143 /*------------------------------------------------------------------------*
144 * usb_pause_ls - factored out code
146 * This function will delay the code by the passed number of system
147 * ticks. The passed lock "lock", will be dropped while waiting,
148 * if * "lock" is different from NULL, "slz" will be left.
150 * This function is here because sometimes we have two subsystems with
151 * different locking primitives (lockmgr locks, lwkt serializers) involved.
152 *------------------------------------------------------------------------*/
154 usb_pause_ls(struct lock *lock, struct lwkt_serialize *slz, int _ticks)
158 locked = (lock != NULL) && lockowned(lock);
160 tsleep_interlock(&usb_pause_ls, 0);
162 lwkt_serialize_exit(slz);
165 lockmgr(lock, LK_RELEASE);
167 tsleep(&usb_pause_ls, PINTERLOCKED, "USBSL2", _ticks);
170 lockmgr(lock, LK_EXCLUSIVE);
172 lwkt_serialize_enter(slz);
175 /*------------------------------------------------------------------------*
178 * This function will print the version number "bcd" to the string
179 * pointed to by "p" having a maximum length of "p_len" bytes
180 * including the terminating zero.
181 *------------------------------------------------------------------------*/
183 usb_printbcd(char *p, uint16_t p_len, uint16_t bcd)
185 if (ksnprintf(p, p_len, "%x.%02x", bcd >> 8, bcd & 0xff)) {
186 /* ignore any errors */
190 /*------------------------------------------------------------------------*
193 * This function removes spaces at the beginning and the end of the string
194 * pointed to by the "p" argument.
195 *------------------------------------------------------------------------*/
197 usb_trim_spaces(char *p)
205 while (*q == ' ') /* skip leading spaces */
207 while ((*p = *q++)) /* copy string */
208 if (*p++ != ' ') /* remember last non-space */
210 *e = 0; /* kill trailing spaces */
213 /*------------------------------------------------------------------------*
214 * usb_make_str_desc - convert an ASCII string into a UNICODE string
215 *------------------------------------------------------------------------*/
217 usb_make_str_desc(void *ptr, uint16_t max_len, const char *s)
219 struct usb_string_descriptor *p = ptr;
227 max_len = ((max_len / 2) - 1);
240 totlen = (max_len + 1) * 2;
243 p->bDescriptorType = UDESC_STRING;
246 USETW2(p->bString[max_len], 0, s[max_len]);
252 usb_callout_timeout_wrapper(void *arg)
254 struct usb_callout *uco = (struct usb_callout *)arg;
256 KKASSERT(uco != NULL);
259 * Simulate FreeBSD's callout behaviour which allows
260 * a lock to be acquired before the function is called
263 lockmgr(uco->uco_lock, LK_EXCLUSIVE);
264 uco->uco_func(uco->uco_arg);
265 lockmgr(uco->uco_lock, LK_RELEASE);
266 /* XXX Have to introduce flags and release lock? */
270 usb_callout_init_mtx_dfly(struct usb_callout *uco, struct lock *lock,
273 callout_init(&uco->co);
274 uco->uco_lock = lock;
275 uco->uco_flags = flags;
279 usb_callout_reset_dfly(struct usb_callout *uco, int ticks, timeout_t *func,
282 KKASSERT(uco != NULL);
283 uco->uco_func = func;
286 callout_reset(&uco->co, ticks, &usb_callout_timeout_wrapper, uco);