1 /* $OpenBSD: uhub.c,v 1.31 2005/03/28 02:34:16 dlg Exp $ */
2 /* $NetBSD: uhub.c,v 1.64 2003/02/08 03:32:51 ichiro Exp $ */
3 /* $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $ */
4
5 /*
6 * Copyright (c) 1998 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Lennart Augustsson (lennart@augustsson.net) at
11 * Carlstedt Research & Technology.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the NetBSD
24 * Foundation, Inc. and its contributors.
25 * 4. Neither the name of The NetBSD Foundation nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGE.
40 */
41
42 /*
43 * USB spec: http://www.usb.org/developers/docs/usbspec.zip
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__) || defined(__OpenBSD__)
51 #include <sys/device.h>
52 #include <sys/proc.h>
53 #elif defined(__FreeBSD__)
54 #include <sys/module.h>
55 #include <sys/bus.h>
56 #include "bus_if.h"
57 #endif
58
59 #include <machine/bus.h>
60
61 #include <dev/usb/usb.h>
62 #include <dev/usb/usbdi.h>
63 #include <dev/usb/usbdi_util.h>
64 #include <dev/usb/usbdivar.h>
65
66 #define UHUB_INTR_INTERVAL 255 /* ms */
67
68 #ifdef UHUB_DEBUG
69 #define DPRINTF(x) do { if (uhubdebug) logprintf x; } while (0)
70 #define DPRINTFN(n,x) do { if (uhubdebug>(n)) logprintf x; } while (0)
71 int uhubdebug = 0;
72 #else
73 #define DPRINTF(x)
74 #define DPRINTFN(n,x)
75 #endif
76
77 struct uhub_softc {
78 USBBASEDEVICE sc_dev; /* base device */
79 usbd_device_handle sc_hub; /* USB device */
80 usbd_pipe_handle sc_ipipe; /* interrupt pipe */
81 u_int8_t sc_status[1]; /* XXX more ports */
82 u_char sc_running;
83 };
84 #define UHUB_PROTO(sc) ((sc)->sc_hub->ddesc.bDeviceProtocol)
85 #define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB)
86 #define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT)
87
88 Static usbd_status uhub_explore(usbd_device_handle hub);
89 Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status);
90
91 #if defined(__FreeBSD__)
92 Static bus_child_detached_t uhub_child_detached;
93 #endif
94
95
96 /*
97 * We need two attachment points:
98 * hub to usb and hub to hub
99 * Every other driver only connects to hubs
100 */
101
102 #if defined(__NetBSD__) || defined(__OpenBSD__)
103 USB_DECLARE_DRIVER(uhub);
104
105 #if defined(__NetBSD__)
106 /* Create the driver instance for the hub connected to hub case */
107 CFATTACH_DECL(uhub_uhub, sizeof(struct uhub_softc),
108 uhub_match, uhub_attach, uhub_detach, uhub_activate);
109 #else
110 struct cfattach uhub_uhub_ca = {
111 sizeof(struct uhub_softc), uhub_match, uhub_attach,
112 uhub_detach, uhub_activate
113 };
114 #endif
115 #elif defined(__FreeBSD__)
116 USB_DECLARE_DRIVER_INIT(uhub,
117 DEVMETHOD(bus_child_detached, uhub_child_detached));
118
119 /* Create the driver instance for the hub connected to usb case. */
120 devclass_t uhubroot_devclass;
121
122 Static device_method_t uhubroot_methods[] = {
123 DEVMETHOD(device_probe, uhub_match),
124 DEVMETHOD(device_attach, uhub_attach),
125
126 /* detach is not allowed for a root hub */
127 {0,0}
128 };
129
130 Static driver_t uhubroot_driver = {
131 "uhub",
132 uhubroot_methods,
133 sizeof(struct uhub_softc)
134 };
135 #endif
136
USB_MATCH(uhub)137 USB_MATCH(uhub)
138 {
139 USB_MATCH_START(uhub, uaa);
140 usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device);
141
142 DPRINTFN(5,("uhub_match, dd=%p\n", dd));
143 /*
144 * The subclass for hubs seems to be 0 for some and 1 for others,
145 * so we just ignore the subclass.
146 */
147 if (uaa->iface == NULL && dd->bDeviceClass == UDCLASS_HUB)
148 return (UMATCH_DEVCLASS_DEVSUBCLASS);
149 return (UMATCH_NONE);
150 }
151
USB_ATTACH(uhub)152 USB_ATTACH(uhub)
153 {
154 USB_ATTACH_START(uhub, sc, uaa);
155 usbd_device_handle dev = uaa->device;
156 char devinfo[1024];
157 usbd_status err;
158 struct usbd_hub *hub = NULL;
159 usb_device_request_t req;
160 usb_hub_descriptor_t hubdesc;
161 int p, port, nports, nremov, pwrdly;
162 usbd_interface_handle iface;
163 usb_endpoint_descriptor_t *ed;
164 struct usbd_tt *tts = NULL;
165
166 DPRINTFN(1,("uhub_attach\n"));
167 sc->sc_hub = dev;
168 usbd_devinfo(dev, 1, devinfo, sizeof devinfo);
169 USB_ATTACH_SETUP;
170 printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfo);
171
172 err = usbd_set_config_index(dev, 0, 1);
173 if (err) {
174 DPRINTF(("%s: configuration failed, error=%s\n",
175 USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
176 USB_ATTACH_ERROR_RETURN;
177 }
178
179 if (dev->depth > USB_HUB_MAX_DEPTH) {
180 printf("%s: hub depth (%d) exceeded, hub ignored\n",
181 USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH);
182 USB_ATTACH_ERROR_RETURN;
183 }
184
185 /* Get hub descriptor. */
186 req.bmRequestType = UT_READ_CLASS_DEVICE;
187 req.bRequest = UR_GET_DESCRIPTOR;
188 USETW2(req.wValue, UDESC_HUB, 0);
189 USETW(req.wIndex, 0);
190 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE);
191 DPRINTFN(1,("usb_init_hub: getting hub descriptor\n"));
192 err = usbd_do_request(dev, &req, &hubdesc);
193 nports = hubdesc.bNbrPorts;
194 if (!err && nports > 7) {
195 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);
196 err = usbd_do_request(dev, &req, &hubdesc);
197 }
198 if (err) {
199 DPRINTF(("%s: getting hub descriptor failed, error=%s\n",
200 USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
201 USB_ATTACH_ERROR_RETURN;
202 }
203
204 for (nremov = 0, port = 1; port <= nports; port++)
205 if (!UHD_NOT_REMOV(&hubdesc, port))
206 nremov++;
207 printf("%s: %d port%s with %d removable, %s powered",
208 USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "",
209 nremov, dev->self_powered ? "self" : "bus");
210
211 if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) {
212 printf(", %s transaction translator%s",
213 UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple",
214 UHUB_IS_SINGLE_TT(sc) ? "" : "s");
215 }
216 printf("\n");
217
218 if (nports == 0) {
219 printf("%s: no ports, hub ignored\n", USBDEVNAME(sc->sc_dev));
220 goto bad;
221 }
222
223 hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port),
224 M_USBDEV, M_NOWAIT);
225 if (hub == NULL)
226 USB_ATTACH_ERROR_RETURN;
227 dev->hub = hub;
228 dev->hub->hubsoftc = sc;
229 hub->explore = uhub_explore;
230 hub->hubdesc = hubdesc;
231
232 DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, "
233 "parent->selfpowered=%d\n",
234 dev->self_powered, dev->powersrc->parent,
235 dev->powersrc->parent ?
236 dev->powersrc->parent->self_powered : 0));
237
238 if (!dev->self_powered && dev->powersrc->parent != NULL &&
239 !dev->powersrc->parent->self_powered) {
240 printf("%s: bus powered hub connected to bus powered hub, "
241 "ignored\n", USBDEVNAME(sc->sc_dev));
242 goto bad;
243 }
244
245 /* Set up interrupt pipe. */
246 err = usbd_device2interface_handle(dev, 0, &iface);
247 if (err) {
248 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev));
249 goto bad;
250 }
251 ed = usbd_interface2endpoint_descriptor(iface, 0);
252 if (ed == NULL) {
253 printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev));
254 goto bad;
255 }
256 if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
257 printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev));
258 goto bad;
259 }
260
261 err = usbd_open_pipe_intr(iface, ed->bEndpointAddress,
262 USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status,
263 sizeof(sc->sc_status), uhub_intr, UHUB_INTR_INTERVAL);
264 if (err) {
265 printf("%s: cannot open interrupt pipe\n",
266 USBDEVNAME(sc->sc_dev));
267 goto bad;
268 }
269
270 /* Wait with power off for a while. */
271 usbd_delay_ms(dev, USB_POWER_DOWN_TIME);
272
273 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev));
274
275 /*
276 * To have the best chance of success we do things in the exact same
277 * order as Windoze98. This should not be necessary, but some
278 * devices do not follow the USB specs to the letter.
279 *
280 * These are the events on the bus when a hub is attached:
281 * Get device and config descriptors (see attach code)
282 * Get hub descriptor (see above)
283 * For all ports
284 * turn on power
285 * wait for power to become stable
286 * (all below happens in explore code)
287 * For all ports
288 * clear C_PORT_CONNECTION
289 * For all ports
290 * get port status
291 * if device connected
292 * wait 100 ms
293 * turn on reset
294 * wait
295 * clear C_PORT_RESET
296 * get port status
297 * proceed with device attachment
298 */
299
300 if (UHUB_IS_HIGH_SPEED(sc)) {
301 tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) *
302 sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT);
303 if (!tts)
304 goto bad;
305 }
306 /* Set up data structures */
307 for (p = 0; p < nports; p++) {
308 struct usbd_port *up = &hub->ports[p];
309 up->device = NULL;
310 up->parent = dev;
311 up->portno = p+1;
312 if (dev->self_powered)
313 /* Self powered hub, give ports maximum current. */
314 up->power = USB_MAX_POWER;
315 else
316 up->power = USB_MIN_POWER;
317 up->restartcnt = 0;
318 up->reattach = 0;
319 if (UHUB_IS_HIGH_SPEED(sc)) {
320 up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p];
321 up->tt->hub = hub;
322 } else {
323 up->tt = NULL;
324 }
325 }
326
327 /* XXX should check for none, individual, or ganged power? */
328
329 pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR
330 + USB_EXTRA_POWER_UP_TIME;
331 for (port = 1; port <= nports; port++) {
332 /* Turn the power on. */
333 err = usbd_set_port_feature(dev, port, UHF_PORT_POWER);
334 if (err)
335 printf("%s: port %d power on failed, %s\n",
336 USBDEVNAME(sc->sc_dev), port,
337 usbd_errstr(err));
338 DPRINTF(("usb_init_port: turn on port %d power\n", port));
339 /* Wait for stable power. */
340 usbd_delay_ms(dev, pwrdly);
341 }
342
343 /* The usual exploration will finish the setup. */
344
345 sc->sc_running = 1;
346
347 USB_ATTACH_SUCCESS_RETURN;
348
349 bad:
350 if (hub)
351 free(hub, M_USBDEV);
352 dev->hub = NULL;
353 USB_ATTACH_ERROR_RETURN;
354 }
355
356 usbd_status
uhub_explore(usbd_device_handle dev)357 uhub_explore(usbd_device_handle dev)
358 {
359 usb_hub_descriptor_t *hd = &dev->hub->hubdesc;
360 struct uhub_softc *sc = dev->hub->hubsoftc;
361 struct usbd_port *up;
362 usbd_status err;
363 int speed;
364 int port;
365 int change, status, reconnect;
366
367 DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address));
368
369 if (!sc->sc_running)
370 return (USBD_NOT_STARTED);
371
372 /* Ignore hubs that are too deep. */
373 if (dev->depth > USB_HUB_MAX_DEPTH)
374 return (USBD_TOO_DEEP);
375
376 for(port = 1; port <= hd->bNbrPorts; port++) {
377 up = &dev->hub->ports[port-1];
378 err = usbd_get_port_status(dev, port, &up->status);
379 if (err) {
380 DPRINTF(("uhub_explore: get port status failed, "
381 "error=%s\n", usbd_errstr(err)));
382 continue;
383 }
384 status = UGETW(up->status.wPortStatus);
385 change = UGETW(up->status.wPortChange);
386 reconnect = up->reattach;
387 up->reattach = 0;
388 DPRINTFN(3,("uhub_explore: %s port %d status 0x%04x 0x%04x\n",
389 USBDEVNAME(sc->sc_dev), port, status, change));
390 if (change & UPS_C_PORT_ENABLED) {
391 DPRINTF(("uhub_explore: C_PORT_ENABLED\n"));
392 usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);
393 if (change & UPS_C_CONNECT_STATUS) {
394 /* Ignore the port error if the device
395 vanished. */
396 } else if (status & UPS_PORT_ENABLED) {
397 printf("%s: illegal enable change, port %d\n",
398 USBDEVNAME(sc->sc_dev), port);
399 } else {
400 /* Port error condition. */
401 if (up->restartcnt) /* no message first time */
402 printf("%s: port error, restarting "
403 "port %d\n",
404 USBDEVNAME(sc->sc_dev), port);
405
406 if (up->restartcnt++ < USBD_RESTART_MAX)
407 goto disco;
408 else
409 printf("%s: port error, giving up "
410 "port %d\n",
411 USBDEVNAME(sc->sc_dev), port);
412 }
413 }
414 if (!reconnect && !(change & UPS_C_CONNECT_STATUS)) {
415 DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_"
416 "STATUS\n", port));
417 /* No status change, just do recursive explore. */
418 if (up->device != NULL && up->device->hub != NULL)
419 up->device->hub->explore(up->device);
420 #if 0 && defined(DIAGNOSTIC)
421 if (up->device == NULL &&
422 (status & UPS_CURRENT_CONNECT_STATUS))
423 printf("%s: connected, no device\n",
424 USBDEVNAME(sc->sc_dev));
425 #endif
426 continue;
427 }
428
429 /* We have a connect status change, handle it. */
430
431 DPRINTF(("uhub_explore: status change hub=%d port=%d\n",
432 dev->address, port));
433 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION);
434 /*usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);*/
435 /*
436 * If there is already a device on the port the change status
437 * must mean that is has disconnected. Looking at the
438 * current connect status is not enough to figure this out
439 * since a new unit may have been connected before we handle
440 * the disconnect.
441 */
442 disco:
443 if (up->device != NULL) {
444 /* Disconnected */
445 DPRINTF(("uhub_explore: device addr=%d disappeared "
446 "on port %d\n", up->device->address, port));
447 usb_disconnect_port(up, USBDEV(sc->sc_dev));
448 usbd_clear_port_feature(dev, port,
449 UHF_C_PORT_CONNECTION);
450 }
451 if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
452 /* Nothing connected, just ignore it. */
453 DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT"
454 "_STATUS\n", port));
455 continue;
456 }
457
458 /* Connected */
459
460 if (!(status & UPS_PORT_POWER))
461 printf("%s: strange, connected port %d has no power\n",
462 USBDEVNAME(sc->sc_dev), port);
463
464 /* Wait for maximum device power up time. */
465 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY);
466
467 /* Reset port, which implies enabling it. */
468 if (usbd_reset_port(dev, port, &up->status)) {
469 printf("%s: port %d reset failed\n",
470 USBDEVNAME(sc->sc_dev), port);
471 continue;
472 }
473 /* Get port status again, it might have changed during reset */
474 err = usbd_get_port_status(dev, port, &up->status);
475 if (err) {
476 DPRINTF(("uhub_explore: get port status failed, "
477 "error=%s\n", usbd_errstr(err)));
478 continue;
479 }
480 status = UGETW(up->status.wPortStatus);
481 change = UGETW(up->status.wPortChange);
482 if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
483 /* Nothing connected, just ignore it. */
484 #ifdef UHUB_DEBUG
485 printf("%s: port %d, device disappeared after reset\n",
486 USBDEVNAME(sc->sc_dev), port);
487 #endif
488 continue;
489 }
490
491 /* Figure out device speed */
492 if (status & UPS_HIGH_SPEED)
493 speed = USB_SPEED_HIGH;
494 else if (status & UPS_LOW_SPEED)
495 speed = USB_SPEED_LOW;
496 else
497 speed = USB_SPEED_FULL;
498 /* Get device info and set its address. */
499 err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus,
500 dev->depth + 1, speed, port, up);
501 /* XXX retry a few times? */
502 if (err) {
503 DPRINTFN(-1,("uhub_explore: usb_new_device failed, "
504 "error=%s\n", usbd_errstr(err)));
505 /* Avoid addressing problems by disabling. */
506 /* usbd_reset_port(dev, port, &up->status); */
507
508 /*
509 * The unit refused to accept a new address, or had
510 * some other serious problem. Since we cannot leave
511 * at 0 we have to disable the port instead.
512 */
513 printf("%s: device problem, disabling port %d\n",
514 USBDEVNAME(sc->sc_dev), port);
515 usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE);
516 } else {
517 /* The port set up succeeded, reset error count. */
518 up->restartcnt = 0;
519
520 if (up->device->hub)
521 up->device->hub->explore(up->device);
522 }
523 }
524 return (USBD_NORMAL_COMPLETION);
525 }
526
527 #if defined(__NetBSD__) || defined(__OpenBSD__)
528 int
uhub_activate(device_ptr_t self,enum devact act)529 uhub_activate(device_ptr_t self, enum devact act)
530 {
531 struct uhub_softc *sc = (struct uhub_softc *)self;
532 struct usbd_hub *hub = sc->sc_hub->hub;
533 usbd_device_handle dev;
534 int nports, port, i;
535
536 switch (act) {
537 case DVACT_ACTIVATE:
538 return (EOPNOTSUPP);
539
540 case DVACT_DEACTIVATE:
541 if (hub == NULL) /* malfunctioning hub */
542 break;
543 nports = hub->hubdesc.bNbrPorts;
544 for(port = 0; port < nports; port++) {
545 dev = hub->ports[port].device;
546 if (dev != NULL && dev->subdevs != NULL) {
547 for (i = 0; dev->subdevs[i] != NULL; i++)
548 config_deactivate(dev->subdevs[i]);
549 }
550 }
551 break;
552 }
553 return (0);
554 }
555 #endif
556
557 /*
558 * Called from process context when the hub is gone.
559 * Detach all devices on active ports.
560 */
USB_DETACH(uhub)561 USB_DETACH(uhub)
562 {
563 USB_DETACH_START(uhub, sc);
564 struct usbd_hub *hub = sc->sc_hub->hub;
565 struct usbd_port *rup;
566 int port, nports;
567
568 #if defined(__NetBSD__) || defined(__OpenBSD__)
569 DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags));
570 #elif defined(__FreeBSD__)
571 DPRINTF(("uhub_detach: sc=%port\n", sc));
572 #endif
573
574 if (hub == NULL) /* Must be partially working */
575 return (0);
576
577 usbd_abort_pipe(sc->sc_ipipe);
578 usbd_close_pipe(sc->sc_ipipe);
579
580 nports = hub->hubdesc.bNbrPorts;
581 for(port = 0; port < nports; port++) {
582 rup = &hub->ports[port];
583 if (rup->device)
584 usb_disconnect_port(rup, self);
585 }
586
587 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub,
588 USBDEV(sc->sc_dev));
589
590 if (hub->ports[0].tt)
591 free(hub->ports[0].tt, M_USBDEV);
592 free(hub, M_USBDEV);
593 sc->sc_hub->hub = NULL;
594
595 return (0);
596 }
597
598 #if defined(__FreeBSD__)
599 /* Called when a device has been detached from it */
600 Static void
uhub_child_detached(device_t self,device_t child)601 uhub_child_detached(device_t self, device_t child)
602 {
603 struct uhub_softc *sc = device_get_softc(self);
604 usbd_device_handle devhub = sc->sc_hub;
605 usbd_device_handle dev;
606 int nports;
607 int port;
608 int i;
609
610 if (!devhub->hub)
611 /* should never happen; children are only created after init */
612 panic("hub not fully initialised, but child deleted?");
613
614 nports = devhub->hub->hubdesc.bNbrPorts;
615 for (port = 0; port < nports; port++) {
616 dev = devhub->hub->ports[port].device;
617 if (dev && dev->subdevs) {
618 for (i = 0; dev->subdevs[i]; i++) {
619 if (dev->subdevs[i] == child) {
620 dev->subdevs[i] = NULL;
621 return;
622 }
623 }
624 }
625 }
626 }
627 #endif
628
629
630 /*
631 * Hub interrupt.
632 * This an indication that some port has changed status.
633 * Notify the bus event handler thread that we need
634 * to be explored again.
635 */
636 void
uhub_intr(usbd_xfer_handle xfer,usbd_private_handle addr,usbd_status status)637 uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
638 {
639 struct uhub_softc *sc = addr;
640
641 DPRINTFN(5,("uhub_intr: sc=%p\n", sc));
642 if (status == USBD_STALLED)
643 usbd_clear_endpoint_stall_async(sc->sc_ipipe);
644 else if (status == USBD_NORMAL_COMPLETION)
645 usb_needs_explore(sc->sc_hub);
646 }
647
648 #if defined(__FreeBSD__)
649 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0);
650 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0);
651 #endif
652