usb.c revision 1.15
1 /* $NetBSD: usb.c,v 1.15 1999/08/02 19:36:48 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (augustss (at) carlstedt.se) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * USB specifications and other documentation can be found at 42 * http://www.usb.org/developers/data/ and 43 * http://www.usb.org/developers/index.html . 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/malloc.h> 50 #if defined(__NetBSD__) 51 #include <sys/device.h> 52 #include <sys/kthread.h> 53 #elif defined(__FreeBSD__) 54 #include <sys/module.h> 55 #include <sys/bus.h> 56 #include <sys/ioccom.h> 57 #include <sys/uio.h> 58 #include <sys/conf.h> 59 #endif 60 #include <sys/poll.h> 61 #include <sys/proc.h> 62 #include <sys/select.h> 63 64 #include <dev/usb/usb.h> 65 #include <dev/usb/usbdi.h> 66 #include <dev/usb/usbdi_util.h> 67 68 #if defined(__FreeBSD__) 69 MALLOC_DEFINE(M_USB, "USB", "USB"); 70 MALLOC_DEFINE(M_USBDEV, "USBdev", "USB device"); 71 MALLOC_DEFINE(M_USBHC, "USBHC", "USB host controller"); 72 73 #include "usb_if.h" 74 #endif /* defined(__FreeBSD__) */ 75 76 #include <dev/usb/usbdivar.h> 77 #include <dev/usb/usb_quirks.h> 78 79 #ifdef USB_DEBUG 80 #define DPRINTF(x) if (usbdebug) printf x 81 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 82 int usbdebug = 0; 83 int uhcidebug; 84 int ohcidebug; 85 #else 86 #define DPRINTF(x) 87 #define DPRINTFN(n,x) 88 #endif 89 90 #define USBUNIT(dev) (minor(dev)) 91 92 struct usb_softc { 93 bdevice sc_dev; /* base device */ 94 usbd_bus_handle sc_bus; /* USB controller */ 95 struct usbd_port sc_port; /* dummy port for root hub */ 96 char sc_running; 97 char sc_exploring; 98 struct selinfo sc_consel; /* waiting for connect change */ 99 int shutdown; 100 struct proc *event_thread; 101 }; 102 103 #if defined(__NetBSD__) 104 int usbopen __P((dev_t, int, int, struct proc *)); 105 int usbclose __P((dev_t, int, int, struct proc *)); 106 int usbioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 107 int usbpoll __P((dev_t, int, struct proc *)); 108 109 #elif defined(__FreeBSD__) 110 d_open_t usbopen; 111 d_close_t usbclose; 112 d_ioctl_t usbioctl; 113 int usbpoll __P((dev_t, int, struct proc *)); 114 115 struct cdevsw usb_cdevsw = { 116 usbopen, usbclose, noread, nowrite, 117 usbioctl, nullstop, nullreset, nodevtotty, 118 usbpoll, nommap, nostrat, 119 "usb", NULL, -1 120 }; 121 #endif 122 123 usbd_status usb_discover __P((struct usb_softc *)); 124 void usb_create_event_thread __P((void *)); 125 void usb_event_thread __P((void *)); 126 127 USB_DECLARE_DRIVER_INIT(usb, DEVMETHOD(bus_print_child, usbd_print_child)); 128 129 USB_MATCH(usb) 130 { 131 DPRINTF(("usbd_match\n")); 132 return (UMATCH_GENERIC); 133 } 134 135 USB_ATTACH(usb) 136 { 137 #if defined(__NetBSD__) 138 struct usb_softc *sc = (struct usb_softc *)self; 139 #elif defined(__FreeBSD__) 140 struct usb_softc *sc = device_get_softc(self); 141 void *aux = device_get_ivars(self); 142 #endif 143 usbd_device_handle dev; 144 usbd_status r; 145 146 #if defined(__NetBSD__) 147 printf("\n"); 148 #elif defined(__FreeBSD__) 149 sc->sc_dev = self; 150 #endif 151 152 DPRINTF(("usbd_attach\n")); 153 usbd_init(); 154 sc->sc_bus = aux; 155 sc->sc_bus->usbctl = sc; 156 sc->sc_running = 1; 157 sc->sc_bus->use_polling = 1; 158 sc->sc_port.power = USB_MAX_POWER; 159 r = usbd_new_device(&sc->sc_dev, sc->sc_bus, 0,0,0, &sc->sc_port); 160 161 if (r == USBD_NORMAL_COMPLETION) { 162 dev = sc->sc_port.device; 163 if (!dev->hub) { 164 sc->sc_running = 0; 165 printf("%s: root device is not a hub\n", 166 USBDEVNAME(sc->sc_dev)); 167 USB_ATTACH_ERROR_RETURN; 168 } 169 sc->sc_bus->root_hub = dev; 170 dev->hub->explore(sc->sc_bus->root_hub); 171 } else { 172 printf("%s: root hub problem, error=%d\n", 173 USBDEVNAME(sc->sc_dev), r); 174 sc->sc_running = 0; 175 } 176 sc->sc_bus->use_polling = 0; 177 178 kthread_create(usb_create_event_thread, sc); 179 180 USB_ATTACH_SUCCESS_RETURN; 181 } 182 183 void 184 usb_create_event_thread(arg) 185 void *arg; 186 { 187 struct usb_softc *sc = arg; 188 189 if (kthread_create1(usb_event_thread, sc, &sc->event_thread, 190 "%s", sc->sc_dev.dv_xname)) { 191 printf("%s: unable to create event thread for\n", 192 sc->sc_dev.dv_xname); 193 panic("usb_create_event_thread"); 194 } 195 } 196 197 void 198 usb_event_thread(arg) 199 void *arg; 200 { 201 struct usb_softc *sc = arg; 202 203 while (!sc->shutdown) { 204 (void)tsleep(&sc->sc_bus->needs_explore, 205 PWAIT, "usbevt", hz*30); 206 DPRINTFN(2,("usb_event_thread: woke up\n")); 207 usb_discover(sc); 208 } 209 sc->event_thread = 0; 210 211 /* In case parent is waiting for us to exit. */ 212 wakeup(sc); 213 214 kthread_exit(0); 215 } 216 217 #if defined(__NetBSD__) 218 int 219 usbctlprint(aux, pnp) 220 void *aux; 221 const char *pnp; 222 { 223 /* only "usb"es can attach to host controllers */ 224 if (pnp) 225 printf("usb at %s", pnp); 226 227 return (UNCONF); 228 } 229 #endif 230 231 int 232 usbopen(dev, flag, mode, p) 233 dev_t dev; 234 int flag, mode; 235 struct proc *p; 236 { 237 USB_GET_SC_OPEN(usb, USBUNIT(dev), sc); 238 239 if (sc == 0 || !sc->sc_running) 240 return (ENXIO); 241 242 return (0); 243 } 244 245 int 246 usbclose(dev, flag, mode, p) 247 dev_t dev; 248 int flag, mode; 249 struct proc *p; 250 { 251 return (0); 252 } 253 254 int 255 usbioctl(dev, cmd, data, flag, p) 256 dev_t dev; 257 u_long cmd; 258 caddr_t data; 259 int flag; 260 struct proc *p; 261 { 262 USB_GET_SC(usb, USBUNIT(dev), sc); 263 264 if (sc == 0 || !sc->sc_running) 265 return (ENXIO); 266 switch (cmd) { 267 #ifdef USB_DEBUG 268 case USB_SETDEBUG: 269 usbdebug = uhcidebug = ohcidebug = *(int *)data; 270 break; 271 #endif 272 #if 0 273 case USB_DISCOVER: 274 usb_discover(sc); 275 break; 276 #endif 277 case USB_REQUEST: 278 { 279 struct usb_ctl_request *ur = (void *)data; 280 int len = UGETW(ur->request.wLength); 281 struct iovec iov; 282 struct uio uio; 283 void *ptr = 0; 284 int addr = ur->addr; 285 usbd_status r; 286 int error = 0; 287 288 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 289 if (len < 0 || len > 32768) 290 return (EINVAL); 291 if (addr < 0 || addr >= USB_MAX_DEVICES || 292 sc->sc_bus->devices[addr] == 0) 293 return (EINVAL); 294 if (len != 0) { 295 iov.iov_base = (caddr_t)ur->data; 296 iov.iov_len = len; 297 uio.uio_iov = &iov; 298 uio.uio_iovcnt = 1; 299 uio.uio_resid = len; 300 uio.uio_offset = 0; 301 uio.uio_segflg = UIO_USERSPACE; 302 uio.uio_rw = 303 ur->request.bmRequestType & UT_READ ? 304 UIO_READ : UIO_WRITE; 305 uio.uio_procp = p; 306 ptr = malloc(len, M_TEMP, M_WAITOK); 307 if (uio.uio_rw == UIO_WRITE) { 308 error = uiomove(ptr, len, &uio); 309 if (error) 310 goto ret; 311 } 312 } 313 r = usbd_do_request_flags(sc->sc_bus->devices[addr], 314 &ur->request, ptr, 315 ur->flags, &ur->actlen); 316 if (r != USBD_NORMAL_COMPLETION) { 317 error = EIO; 318 goto ret; 319 } 320 if (len != 0) { 321 if (uio.uio_rw == UIO_READ) { 322 error = uiomove(ptr, len, &uio); 323 if (error) 324 goto ret; 325 } 326 } 327 ret: 328 if (ptr) 329 free(ptr, M_TEMP); 330 return (error); 331 } 332 333 case USB_DEVICEINFO: 334 { 335 struct usb_device_info *di = (void *)data; 336 int addr = di->addr; 337 usbd_device_handle dev; 338 339 if (addr < 1 || addr >= USB_MAX_DEVICES) 340 return (EINVAL); 341 dev = sc->sc_bus->devices[addr]; 342 if (dev == 0) 343 return (ENXIO); 344 usbd_fill_deviceinfo(dev, di); 345 break; 346 } 347 348 case USB_DEVICESTATS: 349 *(struct usb_device_stats *)data = sc->sc_bus->stats; 350 break; 351 352 default: 353 return (ENXIO); 354 } 355 return (0); 356 } 357 358 int 359 usbpoll(dev, events, p) 360 dev_t dev; 361 int events; 362 struct proc *p; 363 { 364 int revents, s; 365 USB_GET_SC(usb, USBUNIT(dev), sc); 366 367 DPRINTFN(2, ("usbpoll: sc=%p events=0x%x\n", sc, events)); 368 s = splusb(); 369 revents = 0; 370 if (events & (POLLOUT | POLLWRNORM)) 371 if (sc->sc_bus->needs_explore) 372 revents |= events & (POLLOUT | POLLWRNORM); 373 DPRINTFN(2, ("usbpoll: revents=0x%x\n", revents)); 374 if (revents == 0) { 375 if (events & (POLLOUT | POLLWRNORM)) { 376 DPRINTFN(2, ("usbpoll: selrecord\n")); 377 selrecord(p, &sc->sc_consel); 378 } 379 } 380 splx(s); 381 return (revents); 382 } 383 384 #if 0 385 int 386 usb_bus_count() 387 { 388 int i, n; 389 390 for (i = n = 0; i < usb_cd.cd_ndevs; i++) 391 if (usb_cd.cd_devs[i]) 392 n++; 393 return (n); 394 } 395 #endif 396 397 #if 0 398 usbd_status 399 usb_get_bus_handle(n, h) 400 int n; 401 usbd_bus_handle *h; 402 { 403 int i; 404 405 for (i = 0; i < usb_cd.cd_ndevs; i++) 406 if (usb_cd.cd_devs[i] && n-- == 0) { 407 *h = usb_cd.cd_devs[i]; 408 return (USBD_NORMAL_COMPLETION); 409 } 410 return (USBD_INVAL); 411 } 412 #endif 413 414 usbd_status 415 usb_discover(sc) 416 struct usb_softc *sc; 417 { 418 int s; 419 420 /* Explore device tree from the root */ 421 /* We need mutual exclusion while traversing the device tree. */ 422 do { 423 s = splusb(); 424 while (sc->sc_exploring) 425 tsleep(&sc->sc_exploring, PRIBIO, "usbdis", 0); 426 sc->sc_exploring = 1; 427 sc->sc_bus->needs_explore = 0; 428 splx(s); 429 430 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 431 432 s = splusb(); 433 sc->sc_exploring = 0; 434 wakeup(&sc->sc_exploring); 435 splx(s); 436 } while (sc->sc_bus->needs_explore); 437 return (USBD_NORMAL_COMPLETION); 438 } 439 440 void 441 usb_needs_explore(bus) 442 usbd_bus_handle bus; 443 { 444 bus->needs_explore = 1; 445 selwakeup(&bus->usbctl->sc_consel); 446 wakeup(&bus->needs_explore); 447 } 448 449 int 450 usb_activate(self, act) 451 struct device *self; 452 enum devact act; 453 { 454 panic("usb_activate\n"); 455 return (0); 456 } 457 458 int 459 usb_detach(self, flags) 460 struct device *self; 461 int flags; 462 { 463 panic("usb_detach\n"); 464 return (0); 465 } 466 467 #if defined(__FreeBSD__) 468 DRIVER_MODULE(usb, root, usb_driver, usb_devclass, 0, 0); 469 #endif 470
Indexes created Tue Sep 23 22:09:46 GMT 2025