uhub.c revision 1.25
1 /* $NetBSD: uhub.c,v 1.25 1999/09/02 18:13:50 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 spec: http://www.usb.org/cgi-usb/mailmerge.cgi/home/usb/docs/developers/cgiform.tpl 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #if defined(__NetBSD__) || defined(__OpenBSD__) 49 #include <sys/device.h> 50 #elif defined(__FreeBSD__) 51 #include <sys/module.h> 52 #include <sys/bus.h> 53 #endif 54 #include <sys/proc.h> 55 56 #include <dev/usb/usb.h> 57 #include <dev/usb/usbdi.h> 58 #include <dev/usb/usbdi_util.h> 59 #include <dev/usb/usbdivar.h> 60 61 #ifdef USB_DEBUG 62 #define DPRINTF(x) if (usbdebug) logprintf x 63 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 64 extern int usbdebug; 65 #else 66 #define DPRINTF(x) 67 #define DPRINTFN(n,x) 68 #endif 69 70 struct uhub_softc { 71 bdevice sc_dev; /* base device */ 72 usbd_device_handle sc_hub; /* USB device */ 73 usbd_pipe_handle sc_ipipe; /* interrupt pipe */ 74 u_int8_t sc_status[1]; /* XXX more ports */ 75 u_char sc_running; 76 }; 77 78 usbd_status uhub_init_port __P((struct usbd_port *)); 79 void uhub_disconnect_port __P((struct usbd_port *up)); 80 usbd_status uhub_explore __P((usbd_device_handle hub)); 81 void uhub_intr __P((usbd_request_handle, usbd_private_handle, usbd_status)); 82 83 USB_DECLARE_DRIVER_NAME(usb, uhub); 84 85 #if defined(__NetBSD__) || defined(__OpenBSD__) 86 struct cfattach uhub_uhub_ca = { 87 sizeof(struct uhub_softc), uhub_match, uhub_attach, 88 uhub_detach, uhub_activate 89 }; 90 #endif 91 92 USB_MATCH(uhub) 93 { 94 USB_MATCH_START(uhub, uaa); 95 usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device); 96 97 DPRINTFN(5,("uhub_match, dd=%p\n", dd)); 98 /* 99 * The subclass for hubs seems to be 0 for some and 1 for others, 100 * so we just ignore the subclass. 101 */ 102 if (uaa->iface == 0 && dd->bDeviceClass == UCLASS_HUB) 103 return (UMATCH_DEVCLASS_DEVSUBCLASS); 104 return (UMATCH_NONE); 105 } 106 107 USB_ATTACH(uhub) 108 { 109 USB_ATTACH_START(uhub, sc, uaa); 110 usbd_device_handle dev = uaa->device; 111 char devinfo[1024]; 112 usbd_status r; 113 struct usbd_hub *hub; 114 usb_device_request_t req; 115 usb_hub_descriptor_t hubdesc; 116 int p, port, nports, nremov; 117 usbd_interface_handle iface; 118 usb_endpoint_descriptor_t *ed; 119 120 DPRINTFN(1,("uhub_attach\n")); 121 sc->sc_hub = dev; 122 usbd_devinfo(dev, 1, devinfo); 123 USB_ATTACH_SETUP; 124 printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfo); 125 126 r = usbd_set_config_index(dev, 0, 1); 127 if (r != USBD_NORMAL_COMPLETION) { 128 DPRINTF(("%s: configuration failed, error=%s\n", 129 USBDEVNAME(sc->sc_dev), usbd_errstr(r))); 130 USB_ATTACH_ERROR_RETURN; 131 } 132 133 if (dev->depth > USB_HUB_MAX_DEPTH) { 134 printf("%s: hub depth (%d) exceeded, hub ignored\n", 135 USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH); 136 USB_ATTACH_ERROR_RETURN; 137 } 138 139 /* Get hub descriptor. */ 140 req.bmRequestType = UT_READ_CLASS_DEVICE; 141 req.bRequest = UR_GET_DESCRIPTOR; 142 USETW(req.wValue, 0); 143 USETW(req.wIndex, 0); 144 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE); 145 DPRINTFN(1,("usb_init_hub: getting hub descriptor\n")); 146 r = usbd_do_request(dev, &req, &hubdesc); 147 nports = hubdesc.bNbrPorts; 148 if (r == USBD_NORMAL_COMPLETION && nports > 7) { 149 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8); 150 r = usbd_do_request(dev, &req, &hubdesc); 151 } 152 if (r != USBD_NORMAL_COMPLETION) { 153 DPRINTF(("%s: getting hub descriptor failed, error=%s\n", 154 USBDEVNAME(sc->sc_dev), usbd_errstr(r))); 155 USB_ATTACH_ERROR_RETURN; 156 } 157 158 for (nremov = 0, port = 1; port <= nports; port++) 159 if (!UHD_NOT_REMOV(&hubdesc, port)) 160 nremov++; 161 printf("%s: %d port%s with %d removable, %s powered\n", 162 USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "", 163 nremov, dev->self_powered ? "self" : "bus"); 164 165 166 hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port), 167 M_USBDEV, M_NOWAIT); 168 if (hub == 0) 169 USB_ATTACH_ERROR_RETURN; 170 dev->hub = hub; 171 dev->hub->hubsoftc = sc; 172 hub->explore = uhub_explore; 173 hub->hubdesc = hubdesc; 174 175 DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, " 176 "parent->selfpowered=%d\n", 177 dev->self_powered, dev->powersrc->parent, 178 dev->powersrc->parent ? 179 dev->powersrc->parent->self_powered : 0)); 180 if (!dev->self_powered && dev->powersrc->parent && 181 !dev->powersrc->parent->self_powered) { 182 printf("%s: bus powered hub connected to bus powered hub, " 183 "ignored\n", 184 USBDEVNAME(sc->sc_dev)); 185 goto bad; 186 } 187 188 /* Set up interrupt pipe. */ 189 r = usbd_device2interface_handle(dev, 0, &iface); 190 if (r != USBD_NORMAL_COMPLETION) { 191 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev)); 192 goto bad; 193 } 194 ed = usbd_interface2endpoint_descriptor(iface, 0); 195 if (ed == 0) { 196 printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev)); 197 goto bad; 198 } 199 if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { 200 printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev)); 201 goto bad; 202 } 203 204 r = usbd_open_pipe_intr(iface, ed->bEndpointAddress,USBD_SHORT_XFER_OK, 205 &sc->sc_ipipe, sc, sc->sc_status, 206 sizeof(sc->sc_status), 207 uhub_intr); 208 if (r != USBD_NORMAL_COMPLETION) { 209 printf("%s: cannot open interrupt pipe\n", 210 USBDEVNAME(sc->sc_dev)); 211 goto bad; 212 } 213 214 /* Wait with power off for a while. */ 215 usbd_delay_ms(dev, USB_POWER_DOWN_TIME); 216 217 for (p = 0; p < nports; p++) { 218 struct usbd_port *up = &hub->ports[p]; 219 up->device = 0; 220 up->parent = dev; 221 up->portno = p+1; 222 r = uhub_init_port(up); 223 if (r != USBD_NORMAL_COMPLETION) 224 printf("%s: init of port %d failed\n", 225 USBDEVNAME(sc->sc_dev), up->portno); 226 } 227 sc->sc_running = 1; 228 229 USB_ATTACH_SUCCESS_RETURN; 230 231 bad: 232 free(hub, M_USBDEV); 233 dev->hub = 0; 234 USB_ATTACH_ERROR_RETURN; 235 } 236 237 usbd_status 238 uhub_init_port(up) 239 struct usbd_port *up; 240 { 241 int port = up->portno; 242 usbd_device_handle dev = up->parent; 243 usbd_status r; 244 u_int16_t pstatus; 245 246 r = usbd_get_port_status(dev, port, &up->status); 247 if (r != USBD_NORMAL_COMPLETION) 248 return (r); 249 pstatus = UGETW(up->status.wPortStatus); 250 DPRINTF(("usbd_init_port: adding hub port=%d status=0x%04x " 251 "change=0x%04x\n", 252 port, pstatus, UGETW(up->status.wPortChange))); 253 if ((pstatus & UPS_PORT_POWER) == 0) { 254 /* Port lacks power, turn it on */ 255 256 /* First let the device go through a good power cycle, */ 257 usbd_delay_ms(dev, USB_PORT_POWER_DOWN_TIME); 258 259 #if 0 260 usbd_clear_hub_feature(dev, UHF_C_HUB_OVER_CURRENT); 261 usbd_clear_port_feature(dev, port, UHF_C_PORT_OVER_CURRENT); 262 #endif 263 264 /* then turn the power on. */ 265 r = usbd_set_port_feature(dev, port, UHF_PORT_POWER); 266 if (r != USBD_NORMAL_COMPLETION) 267 return (r); 268 DPRINTF(("usb_init_port: turn on port %d power status=0x%04x " 269 "change=0x%04x\n", 270 port, UGETW(up->status.wPortStatus), 271 UGETW(up->status.wPortChange))); 272 /* Wait for stable power. */ 273 usbd_delay_ms(dev, dev->hub->hubdesc.bPwrOn2PwrGood * 274 UHD_PWRON_FACTOR); 275 /* Get the port status again. */ 276 r = usbd_get_port_status(dev, port, &up->status); 277 if (r != USBD_NORMAL_COMPLETION) 278 return (r); 279 DPRINTF(("usb_init_port: after power on status=0x%04x " 280 "change=0x%04x\n", 281 UGETW(up->status.wPortStatus), 282 UGETW(up->status.wPortChange))); 283 284 #if 0 285 usbd_clear_hub_feature(dev, UHF_C_HUB_OVER_CURRENT); 286 usbd_clear_port_feature(dev, port, UHF_C_PORT_OVER_CURRENT); 287 usbd_get_port_status(dev, port, &up->status); 288 #endif 289 290 pstatus = UGETW(up->status.wPortStatus); 291 if ((pstatus & UPS_PORT_POWER) == 0) 292 printf("%s: port %d did not power up\n", 293 USBDEVNAME(((struct uhub_softc *)dev->hub->hubsoftc)->sc_dev), port); 294 295 } 296 if (dev->self_powered) 297 /* Self powered hub, give ports maximum current. */ 298 up->power = USB_MAX_POWER; 299 else 300 up->power = USB_MIN_POWER; 301 return (USBD_NORMAL_COMPLETION); 302 } 303 304 usbd_status 305 uhub_explore(dev) 306 usbd_device_handle dev; 307 { 308 usb_hub_descriptor_t *hd = &dev->hub->hubdesc; 309 struct uhub_softc *sc = dev->hub->hubsoftc; 310 struct usbd_port *up; 311 usbd_status r; 312 int port; 313 int change, status; 314 315 DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address)); 316 317 if (!sc->sc_running) 318 return (USBD_NOT_STARTED); 319 320 /* Ignore hubs that are too deep. */ 321 if (dev->depth > USB_HUB_MAX_DEPTH) 322 return (USBD_TOO_DEEP); 323 324 for(port = 1; port <= hd->bNbrPorts; port++) { 325 up = &dev->hub->ports[port-1]; 326 r = usbd_get_port_status(dev, port, &up->status); 327 if (r != USBD_NORMAL_COMPLETION) { 328 DPRINTF(("uhub_explore: get port status failed, " 329 "error=%s\n", 330 usbd_errstr(r))); 331 continue; 332 } 333 status = UGETW(up->status.wPortStatus); 334 change = UGETW(up->status.wPortChange); 335 DPRINTFN(5, ("uhub_explore: port %d status 0x%04x 0x%04x\n", 336 port, status, change)); 337 if (change & UPS_C_PORT_ENABLED) { 338 usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE); 339 if (status & UPS_PORT_ENABLED) { 340 printf("%s: illegal enable change, port %d\n", 341 USBDEVNAME(sc->sc_dev), port); 342 } else { 343 /* Port error condition. */ 344 if (up->restartcnt++ < USBD_RESTART_MAX) { 345 printf("%s: port error, restarting " 346 "port %d\n", 347 USBDEVNAME(sc->sc_dev), port); 348 goto disco; 349 } else { 350 printf("%s: port error, giving up " 351 "port %d\n", 352 USBDEVNAME(sc->sc_dev), port); 353 } 354 } 355 } 356 if (!(change & UPS_C_CONNECT_STATUS)) { 357 /* No status change, just do recursive explore. */ 358 if (up->device && up->device->hub) 359 up->device->hub->explore(up->device); 360 continue; 361 } 362 DPRINTF(("uhub_explore: status change hub=%d port=%d\n", 363 dev->address, port)); 364 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); 365 usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE); 366 /* 367 * If there is already a device on the port the change status 368 * must mean that is has disconnected. Looking at the 369 * current connect status is not enough to figure this out 370 * since a new unit may have been connected before we handle 371 * the disconnect. 372 */ 373 disco: 374 if (up->device) { 375 /* Disconnected */ 376 DPRINTF(("uhub_explore: device %d disappeared " 377 "on port %d\n", 378 up->device->address, port)); 379 uhub_disconnect_port(up); 380 usbd_clear_port_feature(dev, port, 381 UHF_C_PORT_CONNECTION); 382 } 383 if (!(status & UPS_CURRENT_CONNECT_STATUS)) 384 continue; 385 386 /* Connected */ 387 up->restartcnt = 0; 388 389 /* Wait for maximum device power up time. */ 390 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY); 391 392 /* Reset port, which implies enabling it. */ 393 if (usbd_reset_port(dev, port, &up->status) != 394 USBD_NORMAL_COMPLETION) 395 continue; 396 397 /* Get device info and set its address. */ 398 r = usbd_new_device(&sc->sc_dev, dev->bus, 399 dev->depth + 1, status & UPS_LOW_SPEED, 400 port, up); 401 /* XXX retry a few times? */ 402 if (r != USBD_NORMAL_COMPLETION) { 403 DPRINTFN(-1,("uhub_explore: usb_new_device failed, " 404 "error=%s\n", usbd_errstr(r))); 405 /* Avoid addressing problems by disabling. */ 406 /* usbd_reset_port(dev, port, &up->status); */ 407 /* XXX 408 * What should we do. The device may or may not be at its 409 * assigned address. In any case we'd like to ignore it. 410 * Maybe the port should be disabled until the device is 411 * disconnected. 412 */ 413 if (r == USBD_SET_ADDR_FAILED || 1) {/* XXX */ 414 /* The unit refused to accept a new 415 * address, and since we cannot leave 416 * at 0 we have to disable the port 417 * instead. */ 418 printf("%s: device problem, disabling " 419 "port %d\n", 420 USBDEVNAME(sc->sc_dev), port); 421 usbd_clear_port_feature(dev, port, 422 UHF_PORT_ENABLE); 423 /* Make sure we don't try to restart it. */ 424 up->restartcnt = USBD_RESTART_MAX; 425 } 426 } else { 427 if (up->device->hub) 428 up->device->hub->explore(up->device); 429 } 430 } 431 return (USBD_NORMAL_COMPLETION); 432 } 433 434 /* 435 * The general mechanism for detaching drivers works as follows: Each 436 * driver is responsible for maintaining a reference count on the 437 * number of outstanding references to its softc (e.g. from 438 * processing hanging in a read or write). The detach method of the 439 * driver decrements this counter and flags in the softc that the 440 * driver is dying and then wakes any sleepers. It then sleeps on the 441 * softc. Each place that can sleep must maintain the reference 442 * count. When the reference count drops to -1 (0 is the normal value 443 * of the reference count) the a wakeup on the softc is performed 444 * signaling to the detach waiter that all references are gone. 445 */ 446 447 /* 448 * Called from process context when we discover that a port has 449 * been disconnected. 450 */ 451 void 452 uhub_disconnect_port(up) 453 struct usbd_port *up; 454 { 455 usbd_device_handle dev = up->device; 456 char *hubname; 457 int i; 458 459 DPRINTFN(3,("uhub_disconnect: up=%p dev=%p port=%d\n", 460 up, dev, up->portno)); 461 462 if (!dev->cdesc) { 463 /* Partially attached device, just drop it. */ 464 dev->bus->devices[dev->address] = 0; 465 up->device = 0; 466 return; 467 } 468 469 if (dev->subdevs) { 470 hubname = USBDEVNAME(*up->parent->subdevs[0]); 471 for (i = 0; dev->subdevs[i]; i++) { 472 printf("%s: at %s port %d (addr %d) disconnected\n", 473 USBDEVNAME(*dev->subdevs[i]), hubname, 474 up->portno, dev->address); 475 config_detach(dev->subdevs[i], DETACH_FORCE); 476 } 477 } 478 479 dev->bus->devices[dev->address] = 0; 480 up->device = 0; 481 usb_free_device(dev); 482 483 #if defined(__FreeBSD__) 484 device_delete_child( 485 device_get_parent(((struct softc *)dev->softc)->sc_dev), 486 ((struct softc *)dev->softc)->sc_dev); 487 #endif 488 } 489 490 int 491 uhub_activate(self, act) 492 bdevice *self; 493 enum devact act; 494 { 495 switch (act) { 496 case DVACT_ACTIVATE: 497 return (EOPNOTSUPP); 498 break; 499 500 case DVACT_DEACTIVATE: 501 break; 502 } 503 return (0); 504 } 505 506 /* 507 * Called from process context when the hub is gone. 508 * Detach all devices on active ports. 509 */ 510 int 511 uhub_detach(self, flags) 512 bdevice *self; 513 int flags; 514 { 515 struct uhub_softc *sc = (struct uhub_softc *)self; 516 usbd_device_handle dev = sc->sc_hub; 517 struct usbd_port *rup; 518 int p, nports; 519 520 DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags)); 521 522 if (!dev->hub) { 523 /* Must be partially working */ 524 return (0); 525 } 526 527 usbd_abort_pipe(sc->sc_ipipe); 528 usbd_close_pipe(sc->sc_ipipe); 529 530 nports = dev->hub->hubdesc.bNbrPorts; 531 for(p = 0; p < nports; p++) { 532 rup = &dev->hub->ports[p]; 533 if (rup->device) 534 uhub_disconnect_port(rup); 535 } 536 537 free(dev->hub, M_USBDEV); 538 dev->hub = 0; 539 540 return (0); 541 } 542 543 /* 544 * Hub interrupt. 545 * This an indication that some port has changed status. 546 * Notify the bus event handler thread that we need 547 * to be explored again. 548 */ 549 void 550 uhub_intr(reqh, addr, status) 551 usbd_request_handle reqh; 552 usbd_private_handle addr; 553 usbd_status status; 554 { 555 struct uhub_softc *sc = addr; 556 557 DPRINTFN(5,("uhub_intr: sc=%p\n", sc)); 558 if (status != USBD_NORMAL_COMPLETION) 559 usbd_clear_endpoint_stall_async(sc->sc_ipipe); 560 561 usb_needs_explore(sc->sc_hub->bus); 562 } 563 564 #if defined(__FreeBSD__) 565 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0); 566 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0); 567 #endif 568
Indexes created Fri Sep 26 08:10:20 GMT 2025