usb_util.c revision 184610
1184610Salfred/* $FreeBSD: head/sys/dev/usb2/core/usb2_util.c 184610 2008-11-04 02:31:03Z alfred $ */ 2184610Salfred/*- 3184610Salfred * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4184610Salfred * 5184610Salfred * Redistribution and use in source and binary forms, with or without 6184610Salfred * modification, are permitted provided that the following conditions 7184610Salfred * are met: 8184610Salfred * 1. Redistributions of source code must retain the above copyright 9184610Salfred * notice, this list of conditions and the following disclaimer. 10184610Salfred * 2. Redistributions in binary form must reproduce the above copyright 11184610Salfred * notice, this list of conditions and the following disclaimer in the 12184610Salfred * documentation and/or other materials provided with the distribution. 13184610Salfred * 14184610Salfred * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15184610Salfred * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16184610Salfred * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17184610Salfred * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18184610Salfred * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19184610Salfred * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20184610Salfred * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21184610Salfred * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22184610Salfred * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23184610Salfred * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24184610Salfred * SUCH DAMAGE. 25184610Salfred */ 26184610Salfred 27184610Salfred#include <dev/usb2/include/usb2_defs.h> 28184610Salfred#include <dev/usb2/include/usb2_mfunc.h> 29184610Salfred#include <dev/usb2/include/usb2_error.h> 30184610Salfred#include <dev/usb2/include/usb2_standard.h> 31184610Salfred 32184610Salfred#include <dev/usb2/core/usb2_core.h> 33184610Salfred#include <dev/usb2/core/usb2_util.h> 34184610Salfred#include <dev/usb2/core/usb2_process.h> 35184610Salfred#include <dev/usb2/core/usb2_device.h> 36184610Salfred#include <dev/usb2/core/usb2_request.h> 37184610Salfred#include <dev/usb2/core/usb2_busdma.h> 38184610Salfred 39184610Salfred#include <dev/usb2/controller/usb2_controller.h> 40184610Salfred#include <dev/usb2/controller/usb2_bus.h> 41184610Salfred 42184610Salfred/* function prototypes */ 43184610Salfred#if (USB_USE_CONDVAR == 0) 44184610Salfredstatic int usb2_msleep(void *chan, struct mtx *mtx, int priority, const char *wmesg, int timo); 45184610Salfred 46184610Salfred#endif 47184610Salfred 48184610Salfred/*------------------------------------------------------------------------* 49184610Salfred * device_delete_all_children - delete all children of a device 50184610Salfred *------------------------------------------------------------------------*/ 51184610Salfredint 52184610Salfreddevice_delete_all_children(device_t dev) 53184610Salfred{ 54184610Salfred device_t *devlist; 55184610Salfred int devcount; 56184610Salfred int error; 57184610Salfred 58184610Salfred error = device_get_children(dev, &devlist, &devcount); 59184610Salfred if (error == 0) { 60184610Salfred while (devcount-- > 0) { 61184610Salfred error = device_delete_child(dev, devlist[devcount]); 62184610Salfred if (error) { 63184610Salfred break; 64184610Salfred } 65184610Salfred } 66184610Salfred free(devlist, M_TEMP); 67184610Salfred } 68184610Salfred return (error); 69184610Salfred} 70184610Salfred 71184610Salfred/*------------------------------------------------------------------------* 72184610Salfred * device_set_usb2_desc 73184610Salfred * 74184610Salfred * This function can be called at probe or attach to set the USB 75184610Salfred * device supplied textual description for the given device. 76184610Salfred *------------------------------------------------------------------------*/ 77184610Salfredvoid 78184610Salfreddevice_set_usb2_desc(device_t dev) 79184610Salfred{ 80184610Salfred struct usb2_attach_arg *uaa; 81184610Salfred struct usb2_device *udev; 82184610Salfred struct usb2_interface *iface; 83184610Salfred char *temp_p; 84184610Salfred usb2_error_t err; 85184610Salfred 86184610Salfred if (dev == NULL) { 87184610Salfred /* should not happen */ 88184610Salfred return; 89184610Salfred } 90184610Salfred uaa = device_get_ivars(dev); 91184610Salfred if (uaa == NULL) { 92184610Salfred /* can happend if called at the wrong time */ 93184610Salfred return; 94184610Salfred } 95184610Salfred udev = uaa->device; 96184610Salfred iface = uaa->iface; 97184610Salfred 98184610Salfred if ((iface == NULL) || 99184610Salfred (iface->idesc == NULL) || 100184610Salfred (iface->idesc->iInterface == 0)) { 101184610Salfred err = USB_ERR_INVAL; 102184610Salfred } else { 103184610Salfred err = 0; 104184610Salfred } 105184610Salfred 106184610Salfred temp_p = (char *)udev->bus->scratch[0].data; 107184610Salfred 108184610Salfred if (!err) { 109184610Salfred /* try to get the interface string ! */ 110184610Salfred err = usb2_req_get_string_any 111184610Salfred (udev, NULL, temp_p, 112184610Salfred sizeof(udev->bus->scratch), iface->idesc->iInterface); 113184610Salfred } 114184610Salfred if (err) { 115184610Salfred /* use default description */ 116184610Salfred usb2_devinfo(udev, temp_p, 117184610Salfred sizeof(udev->bus->scratch)); 118184610Salfred } 119184610Salfred device_set_desc_copy(dev, temp_p); 120184610Salfred device_printf(dev, "<%s> on %s\n", temp_p, 121184610Salfred device_get_nameunit(udev->bus->bdev)); 122184610Salfred return; 123184610Salfred} 124184610Salfred 125184610Salfred/*------------------------------------------------------------------------* 126184610Salfred * usb2_pause_mtx - factored out code 127184610Salfred * 128184610Salfred * This function will delay the code by the passed number of 129184610Salfred * milliseconds. The passed mutex "mtx" will be dropped while waiting, 130184610Salfred * if "mtx" is not NULL. The number of milliseconds per second is 1024 131184610Salfred * for sake of optimisation. 132184610Salfred *------------------------------------------------------------------------*/ 133184610Salfredvoid 134184610Salfredusb2_pause_mtx(struct mtx *mtx, uint32_t ms) 135184610Salfred{ 136184610Salfred if (cold) { 137184610Salfred ms = (ms + 1) * 1024; 138184610Salfred DELAY(ms); 139184610Salfred 140184610Salfred } else { 141184610Salfred 142184610Salfred ms = USB_MS_TO_TICKS(ms); 143184610Salfred /* 144184610Salfred * Add one to the number of ticks so that we don't return 145184610Salfred * too early! 146184610Salfred */ 147184610Salfred ms++; 148184610Salfred 149184610Salfred if (mtx != NULL) 150184610Salfred mtx_unlock(mtx); 151184610Salfred 152184610Salfred if (pause("USBWAIT", ms)) { 153184610Salfred /* ignore */ 154184610Salfred } 155184610Salfred if (mtx != NULL) 156184610Salfred mtx_lock(mtx); 157184610Salfred } 158184610Salfred return; 159184610Salfred} 160184610Salfred 161184610Salfred/*------------------------------------------------------------------------* 162184610Salfred * usb2_printBCD 163184610Salfred * 164184610Salfred * This function will print the version number "bcd" to the string 165184610Salfred * pointed to by "p" having a maximum length of "p_len" bytes 166184610Salfred * including the terminating zero. 167184610Salfred *------------------------------------------------------------------------*/ 168184610Salfredvoid 169184610Salfredusb2_printBCD(char *p, uint16_t p_len, uint16_t bcd) 170184610Salfred{ 171184610Salfred if (snprintf(p, p_len, "%x.%02x", bcd >> 8, bcd & 0xff)) { 172184610Salfred /* ignore any errors */ 173184610Salfred } 174184610Salfred return; 175184610Salfred} 176184610Salfred 177184610Salfred/*------------------------------------------------------------------------* 178184610Salfred * usb2_trim_spaces 179184610Salfred * 180184610Salfred * This function removes spaces at the beginning and the end of the string 181184610Salfred * pointed to by the "p" argument. 182184610Salfred *------------------------------------------------------------------------*/ 183184610Salfredvoid 184184610Salfredusb2_trim_spaces(char *p) 185184610Salfred{ 186184610Salfred char *q; 187184610Salfred char *e; 188184610Salfred 189184610Salfred if (p == NULL) 190184610Salfred return; 191184610Salfred q = e = p; 192184610Salfred while (*q == ' ') /* skip leading spaces */ 193184610Salfred q++; 194184610Salfred while ((*p = *q++)) /* copy string */ 195184610Salfred if (*p++ != ' ') /* remember last non-space */ 196184610Salfred e = p; 197184610Salfred *e = 0; /* kill trailing spaces */ 198184610Salfred return; 199184610Salfred} 200184610Salfred 201184610Salfred/*------------------------------------------------------------------------* 202184610Salfred * usb2_get_devid 203184610Salfred * 204184610Salfred * This function returns the USB Vendor and Product ID like a 32-bit 205184610Salfred * unsigned integer. 206184610Salfred *------------------------------------------------------------------------*/ 207184610Salfreduint32_t 208184610Salfredusb2_get_devid(device_t dev) 209184610Salfred{ 210184610Salfred struct usb2_attach_arg *uaa = device_get_ivars(dev); 211184610Salfred 212184610Salfred return ((uaa->info.idVendor << 16) | (uaa->info.idProduct)); 213184610Salfred} 214184610Salfred 215184610Salfred/*------------------------------------------------------------------------* 216184610Salfred * usb2_make_str_desc - convert an ASCII string into a UNICODE string 217184610Salfred *------------------------------------------------------------------------*/ 218184610Salfreduint8_t 219184610Salfredusb2_make_str_desc(void *ptr, uint16_t max_len, const char *s) 220184610Salfred{ 221184610Salfred struct usb2_string_descriptor *p = ptr; 222184610Salfred uint8_t totlen; 223184610Salfred int j; 224184610Salfred 225184610Salfred if (max_len < 2) { 226184610Salfred /* invalid length */ 227184610Salfred return (0); 228184610Salfred } 229184610Salfred max_len = ((max_len / 2) - 1); 230184610Salfred 231184610Salfred j = strlen(s); 232184610Salfred 233184610Salfred if (j < 0) { 234184610Salfred j = 0; 235184610Salfred } 236184610Salfred if (j > 126) { 237184610Salfred j = 126; 238184610Salfred } 239184610Salfred if (max_len > j) { 240184610Salfred max_len = j; 241184610Salfred } 242184610Salfred totlen = (max_len + 1) * 2; 243184610Salfred 244184610Salfred p->bLength = totlen; 245184610Salfred p->bDescriptorType = UDESC_STRING; 246184610Salfred 247184610Salfred while (max_len--) { 248184610Salfred USETW2(p->bString[max_len], 0, s[max_len]); 249184610Salfred } 250184610Salfred return (totlen); 251184610Salfred} 252184610Salfred 253184610Salfred#if (USB_USE_CONDVAR == 0) 254184610Salfred 255184610Salfred/*------------------------------------------------------------------------* 256184610Salfred * usb2_cv_init - wrapper function 257184610Salfred *------------------------------------------------------------------------*/ 258184610Salfredvoid 259184610Salfredusb2_cv_init(struct cv *cv, const char *desc) 260184610Salfred{ 261184610Salfred cv_init(cv, desc); 262184610Salfred return; 263184610Salfred} 264184610Salfred 265184610Salfred/*------------------------------------------------------------------------* 266184610Salfred * usb2_cv_destroy - wrapper function 267184610Salfred *------------------------------------------------------------------------*/ 268184610Salfredvoid 269184610Salfredusb2_cv_destroy(struct cv *cv) 270184610Salfred{ 271184610Salfred cv_destroy(cv); 272184610Salfred return; 273184610Salfred} 274184610Salfred 275184610Salfred/*------------------------------------------------------------------------* 276184610Salfred * usb2_cv_wait - wrapper function 277184610Salfred *------------------------------------------------------------------------*/ 278184610Salfredvoid 279184610Salfredusb2_cv_wait(struct cv *cv, struct mtx *mtx) 280184610Salfred{ 281184610Salfred int err; 282184610Salfred 283184610Salfred err = usb2_msleep(cv, mtx, 0, cv_wmesg(cv), 0); 284184610Salfred return; 285184610Salfred} 286184610Salfred 287184610Salfred/*------------------------------------------------------------------------* 288184610Salfred * usb2_cv_wait_sig - wrapper function 289184610Salfred *------------------------------------------------------------------------*/ 290184610Salfredint 291184610Salfredusb2_cv_wait_sig(struct cv *cv, struct mtx *mtx) 292184610Salfred{ 293184610Salfred int err; 294184610Salfred 295184610Salfred err = usb2_msleep(cv, mtx, PCATCH, cv_wmesg(cv), 0); 296184610Salfred return (err); 297184610Salfred} 298184610Salfred 299184610Salfred/*------------------------------------------------------------------------* 300184610Salfred * usb2_cv_timedwait - wrapper function 301184610Salfred *------------------------------------------------------------------------*/ 302184610Salfredint 303184610Salfredusb2_cv_timedwait(struct cv *cv, struct mtx *mtx, int timo) 304184610Salfred{ 305184610Salfred int err; 306184610Salfred 307184610Salfred if (timo == 0) 308184610Salfred timo = 1; /* zero means no timeout */ 309184610Salfred err = usb2_msleep(cv, mtx, 0, cv_wmesg(cv), timo); 310184610Salfred return (err); 311184610Salfred} 312184610Salfred 313184610Salfred/*------------------------------------------------------------------------* 314184610Salfred * usb2_cv_signal - wrapper function 315184610Salfred *------------------------------------------------------------------------*/ 316184610Salfredvoid 317184610Salfredusb2_cv_signal(struct cv *cv) 318184610Salfred{ 319184610Salfred wakeup_one(cv); 320184610Salfred return; 321184610Salfred} 322184610Salfred 323184610Salfred/*------------------------------------------------------------------------* 324184610Salfred * usb2_cv_broadcast - wrapper function 325184610Salfred *------------------------------------------------------------------------*/ 326184610Salfredvoid 327184610Salfredusb2_cv_broadcast(struct cv *cv) 328184610Salfred{ 329184610Salfred wakeup(cv); 330184610Salfred return; 331184610Salfred} 332184610Salfred 333184610Salfred/*------------------------------------------------------------------------* 334184610Salfred * usb2_msleep - wrapper function 335184610Salfred *------------------------------------------------------------------------*/ 336184610Salfredstatic int 337184610Salfredusb2_msleep(void *chan, struct mtx *mtx, int priority, const char *wmesg, 338184610Salfred int timo) 339184610Salfred{ 340184610Salfred int err; 341184610Salfred 342184610Salfred if (mtx == &Giant) { 343184610Salfred err = tsleep(chan, priority, wmesg, timo); 344184610Salfred } else { 345184610Salfred#ifdef mtx_sleep 346184610Salfred err = mtx_sleep(chan, mtx, priority, wmesg, timo); 347184610Salfred#else 348184610Salfred err = msleep(chan, mtx, priority, wmesg, timo); 349184610Salfred#endif 350184610Salfred } 351184610Salfred return (err); 352184610Salfred} 353184610Salfred 354184610Salfred#endif 355