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 #include <sys/param.h> 28 #include <sys/queue.h> 29 #include <sys/types.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/bus.h> 33 #include <sys/module.h> 34 #include <sys/lock.h> 35 #include <sys/mutex.h> 36 #include <sys/condvar.h> 37 #include <sys/sysctl.h> 38 #include <sys/callout.h> 39 #include <sys/malloc.h> 40 #include <sys/priv.h> 41 42 #include <dev/usb/usb.h> 43 #include <dev/usb/usbdi.h> 44 45 #include <dev/usb/usb_device.h> 46 47 /*------------------------------------------------------------------------* 48 * usb_pause_mtx - factored out code 49 * 50 * This function will delay the code by the passed number of system 51 * ticks. The passed mutex "mtx" will be dropped while waiting, if 52 * "mtx" is different from NULL. 53 *------------------------------------------------------------------------*/ 54 void 55 usb_pause_mtx(struct mtx *mtx, int timo) 56 { 57 if (mtx != NULL) 58 mtx_unlock(mtx); 59 60 /* 61 * Add one tick to the timeout so that we don't return too 62 * early! Note that pause() will assert that the passed 63 * timeout is positive and non-zero! 64 */ 65 pause("USBWAIT", timo + 1); 66 67 if (mtx != NULL) 68 mtx_lock(mtx); 69 } 70 71 /*------------------------------------------------------------------------* 72 * usb_printbcd 73 * 74 * This function will print the version number "bcd" to the string 75 * pointed to by "p" having a maximum length of "p_len" bytes 76 * including the terminating zero. 77 *------------------------------------------------------------------------*/ 78 void 79 usb_printbcd(char *p, uint16_t p_len, uint16_t bcd) 80 { 81 if (snprintf(p, p_len, "%x.%02x", bcd >> 8, bcd & 0xff)) { 82 /* ignore any errors */ 83 } 84 } 85 86 /*------------------------------------------------------------------------* 87 * usb_trim_spaces 88 * 89 * This function removes spaces at the beginning and the end of the string 90 * pointed to by the "p" argument. 91 *------------------------------------------------------------------------*/ 92 void 93 usb_trim_spaces(char *p) 94 { 95 char *q; 96 char *e; 97 98 if (p == NULL) 99 return; 100 q = e = p; 101 while (*q == ' ') /* skip leading spaces */ 102 q++; 103 while ((*p = *q++)) /* copy string */ 104 if (*p++ != ' ') /* remember last non-space */ 105 e = p; 106 *e = 0; /* kill trailing spaces */ 107 } 108