1/* $FreeBSD: head/sys/dev/usb/usb_hub.c 246759 2013-02-13 12:35:17Z hselasky $ */
| 1/* $FreeBSD: head/sys/dev/usb/usb_hub.c 250207 2013-05-03 11:10:04Z hselasky $ */
|
2/*-
3 * Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
4 * Copyright (c) 1998 Lennart Augustsson. All rights reserved.
5 * Copyright (c) 2008-2010 Hans Petter Selasky. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29/*
30 * USB spec: http://www.usb.org/developers/docs/usbspec.zip
31 */
32
33#ifdef USB_GLOBAL_INCLUDE_FILE
34#include USB_GLOBAL_INCLUDE_FILE
35#else
36#include <sys/stdint.h>
37#include <sys/stddef.h>
38#include <sys/param.h>
39#include <sys/queue.h>
40#include <sys/types.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/bus.h>
44#include <sys/module.h>
45#include <sys/lock.h>
46#include <sys/mutex.h>
47#include <sys/condvar.h>
48#include <sys/sysctl.h>
49#include <sys/sx.h>
50#include <sys/unistd.h>
51#include <sys/callout.h>
52#include <sys/malloc.h>
53#include <sys/priv.h>
54
55#include <dev/usb/usb.h>
56#include <dev/usb/usb_ioctl.h>
57#include <dev/usb/usbdi.h>
58#include <dev/usb/usbdi_util.h>
59
60#define USB_DEBUG_VAR uhub_debug
61
62#include <dev/usb/usb_core.h>
63#include <dev/usb/usb_process.h>
64#include <dev/usb/usb_device.h>
65#include <dev/usb/usb_request.h>
66#include <dev/usb/usb_debug.h>
67#include <dev/usb/usb_hub.h>
68#include <dev/usb/usb_util.h>
69#include <dev/usb/usb_busdma.h>
70#include <dev/usb/usb_transfer.h>
71#include <dev/usb/usb_dynamic.h>
72
73#include <dev/usb/usb_controller.h>
74#include <dev/usb/usb_bus.h>
75#endif /* USB_GLOBAL_INCLUDE_FILE */
76
77#define UHUB_INTR_INTERVAL 250 /* ms */
78#define UHUB_N_TRANSFER 1
79
80#ifdef USB_DEBUG
81static int uhub_debug = 0;
82
83static SYSCTL_NODE(_hw_usb, OID_AUTO, uhub, CTLFLAG_RW, 0, "USB HUB");
84SYSCTL_INT(_hw_usb_uhub, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_TUN, &uhub_debug, 0,
85 "Debug level");
86TUNABLE_INT("hw.usb.uhub.debug", &uhub_debug);
87#endif
88
89#if USB_HAVE_POWERD
90static int usb_power_timeout = 30; /* seconds */
91
92SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_RW,
93 &usb_power_timeout, 0, "USB power timeout");
94#endif
95
96struct uhub_current_state {
97 uint16_t port_change;
98 uint16_t port_status;
99};
100
101struct uhub_softc {
102 struct uhub_current_state sc_st;/* current state */
| 2/*-
3 * Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
4 * Copyright (c) 1998 Lennart Augustsson. All rights reserved.
5 * Copyright (c) 2008-2010 Hans Petter Selasky. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29/*
30 * USB spec: http://www.usb.org/developers/docs/usbspec.zip
31 */
32
33#ifdef USB_GLOBAL_INCLUDE_FILE
34#include USB_GLOBAL_INCLUDE_FILE
35#else
36#include <sys/stdint.h>
37#include <sys/stddef.h>
38#include <sys/param.h>
39#include <sys/queue.h>
40#include <sys/types.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/bus.h>
44#include <sys/module.h>
45#include <sys/lock.h>
46#include <sys/mutex.h>
47#include <sys/condvar.h>
48#include <sys/sysctl.h>
49#include <sys/sx.h>
50#include <sys/unistd.h>
51#include <sys/callout.h>
52#include <sys/malloc.h>
53#include <sys/priv.h>
54
55#include <dev/usb/usb.h>
56#include <dev/usb/usb_ioctl.h>
57#include <dev/usb/usbdi.h>
58#include <dev/usb/usbdi_util.h>
59
60#define USB_DEBUG_VAR uhub_debug
61
62#include <dev/usb/usb_core.h>
63#include <dev/usb/usb_process.h>
64#include <dev/usb/usb_device.h>
65#include <dev/usb/usb_request.h>
66#include <dev/usb/usb_debug.h>
67#include <dev/usb/usb_hub.h>
68#include <dev/usb/usb_util.h>
69#include <dev/usb/usb_busdma.h>
70#include <dev/usb/usb_transfer.h>
71#include <dev/usb/usb_dynamic.h>
72
73#include <dev/usb/usb_controller.h>
74#include <dev/usb/usb_bus.h>
75#endif /* USB_GLOBAL_INCLUDE_FILE */
76
77#define UHUB_INTR_INTERVAL 250 /* ms */
78#define UHUB_N_TRANSFER 1
79
80#ifdef USB_DEBUG
81static int uhub_debug = 0;
82
83static SYSCTL_NODE(_hw_usb, OID_AUTO, uhub, CTLFLAG_RW, 0, "USB HUB");
84SYSCTL_INT(_hw_usb_uhub, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_TUN, &uhub_debug, 0,
85 "Debug level");
86TUNABLE_INT("hw.usb.uhub.debug", &uhub_debug);
87#endif
88
89#if USB_HAVE_POWERD
90static int usb_power_timeout = 30; /* seconds */
91
92SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_RW,
93 &usb_power_timeout, 0, "USB power timeout");
94#endif
95
96struct uhub_current_state {
97 uint16_t port_change;
98 uint16_t port_status;
99};
100
101struct uhub_softc {
102 struct uhub_current_state sc_st;/* current state */
|
| 103#if (USB_HAVE_FIXED_PORT != 0)
104 struct usb_hub sc_hub;
105#endif
|
103 device_t sc_dev; /* base device */
104 struct mtx sc_mtx; /* our mutex */
105 struct usb_device *sc_udev; /* USB device */
106 struct usb_xfer *sc_xfer[UHUB_N_TRANSFER]; /* interrupt xfer */
107 uint8_t sc_flags;
108#define UHUB_FLAG_DID_EXPLORE 0x01
109};
110
111#define UHUB_PROTO(sc) ((sc)->sc_udev->ddesc.bDeviceProtocol)
112#define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB)
113#define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT)
114#define UHUB_IS_MULTI_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBMTT)
115#define UHUB_IS_SUPER_SPEED(sc) (UHUB_PROTO(sc) == UDPROTO_SSHUB)
116
117/* prototypes for type checking: */
118
119static device_probe_t uhub_probe;
120static device_attach_t uhub_attach;
121static device_detach_t uhub_detach;
122static device_suspend_t uhub_suspend;
123static device_resume_t uhub_resume;
124
125static bus_driver_added_t uhub_driver_added;
126static bus_child_location_str_t uhub_child_location_string;
127static bus_child_pnpinfo_str_t uhub_child_pnpinfo_string;
128
129static usb_callback_t uhub_intr_callback;
130
131static void usb_dev_resume_peer(struct usb_device *udev);
132static void usb_dev_suspend_peer(struct usb_device *udev);
133static uint8_t usb_peer_should_wakeup(struct usb_device *udev);
134
135static const struct usb_config uhub_config[UHUB_N_TRANSFER] = {
136
137 [0] = {
138 .type = UE_INTERRUPT,
139 .endpoint = UE_ADDR_ANY,
140 .direction = UE_DIR_ANY,
141 .timeout = 0,
142 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
143 .bufsize = 0, /* use wMaxPacketSize */
144 .callback = &uhub_intr_callback,
145 .interval = UHUB_INTR_INTERVAL,
146 },
147};
148
149/*
150 * driver instance for "hub" connected to "usb"
151 * and "hub" connected to "hub"
152 */
153static devclass_t uhub_devclass;
154
155static device_method_t uhub_methods[] = {
156 DEVMETHOD(device_probe, uhub_probe),
157 DEVMETHOD(device_attach, uhub_attach),
158 DEVMETHOD(device_detach, uhub_detach),
159
160 DEVMETHOD(device_suspend, uhub_suspend),
161 DEVMETHOD(device_resume, uhub_resume),
162
163 DEVMETHOD(bus_child_location_str, uhub_child_location_string),
164 DEVMETHOD(bus_child_pnpinfo_str, uhub_child_pnpinfo_string),
165 DEVMETHOD(bus_driver_added, uhub_driver_added),
166 DEVMETHOD_END
167};
168
169static driver_t uhub_driver = {
170 .name = "uhub",
171 .methods = uhub_methods,
172 .size = sizeof(struct uhub_softc)
173};
174
175DRIVER_MODULE(uhub, usbus, uhub_driver, uhub_devclass, 0, 0);
176DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, NULL, 0);
177MODULE_VERSION(uhub, 1);
178
179static void
180uhub_intr_callback(struct usb_xfer *xfer, usb_error_t error)
181{
182 struct uhub_softc *sc = usbd_xfer_softc(xfer);
183
184 switch (USB_GET_STATE(xfer)) {
185 case USB_ST_TRANSFERRED:
186 DPRINTFN(2, "\n");
187 /*
188 * This is an indication that some port
189 * has changed status. Notify the bus
190 * event handler thread that we need
191 * to be explored again:
192 */
193 usb_needs_explore(sc->sc_udev->bus, 0);
194
195 case USB_ST_SETUP:
196 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
197 usbd_transfer_submit(xfer);
198 break;
199
200 default: /* Error */
201 if (xfer->error != USB_ERR_CANCELLED) {
202 /*
203 * Do a clear-stall. The "stall_pipe" flag
204 * will get cleared before next callback by
205 * the USB stack.
206 */
207 usbd_xfer_set_stall(xfer);
208 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
209 usbd_transfer_submit(xfer);
210 }
211 break;
212 }
213}
214
215/*------------------------------------------------------------------------*
216 * uhub_explore_sub - subroutine
217 *
218 * Return values:
219 * 0: Success
220 * Else: A control transaction failed
221 *------------------------------------------------------------------------*/
222static usb_error_t
223uhub_explore_sub(struct uhub_softc *sc, struct usb_port *up)
224{
225 struct usb_bus *bus;
226 struct usb_device *child;
227 uint8_t refcount;
228 usb_error_t err;
229
230 bus = sc->sc_udev->bus;
231 err = 0;
232
233 /* get driver added refcount from USB bus */
234 refcount = bus->driver_added_refcount;
235
236 /* get device assosiated with the given port */
237 child = usb_bus_port_get_device(bus, up);
238 if (child == NULL) {
239 /* nothing to do */
240 goto done;
241 }
242
243 /* check if device should be re-enumerated */
244
245 if (child->flags.usb_mode == USB_MODE_HOST) {
246 uint8_t do_unlock;
247
248 do_unlock = usbd_enum_lock(child);
249 if (child->re_enumerate_wait) {
250 err = usbd_set_config_index(child,
251 USB_UNCONFIG_INDEX);
252 if (err != 0) {
253 DPRINTF("Unconfigure failed: "
254 "%s: Ignored.\n",
255 usbd_errstr(err));
256 }
257 err = usbd_req_re_enumerate(child, NULL);
258 if (err == 0)
259 err = usbd_set_config_index(child, 0);
260 if (err == 0) {
261 err = usb_probe_and_attach(child,
262 USB_IFACE_INDEX_ANY);
263 }
264 child->re_enumerate_wait = 0;
265 err = 0;
266 }
267 if (do_unlock)
268 usbd_enum_unlock(child);
269 }
270
271 /* check if probe and attach should be done */
272
273 if (child->driver_added_refcount != refcount) {
274 child->driver_added_refcount = refcount;
275 err = usb_probe_and_attach(child,
276 USB_IFACE_INDEX_ANY);
277 if (err) {
278 goto done;
279 }
280 }
281 /* start control transfer, if device mode */
282
283 if (child->flags.usb_mode == USB_MODE_DEVICE)
284 usbd_ctrl_transfer_setup(child);
285
286 /* if a HUB becomes present, do a recursive HUB explore */
287
288 if (child->hub)
289 err = (child->hub->explore) (child);
290
291done:
292 return (err);
293}
294
295/*------------------------------------------------------------------------*
296 * uhub_read_port_status - factored out code
297 *------------------------------------------------------------------------*/
298static usb_error_t
299uhub_read_port_status(struct uhub_softc *sc, uint8_t portno)
300{
301 struct usb_port_status ps;
302 usb_error_t err;
303
304 err = usbd_req_get_port_status(
305 sc->sc_udev, NULL, &ps, portno);
306
307 /* update status regardless of error */
308
309 sc->sc_st.port_status = UGETW(ps.wPortStatus);
310 sc->sc_st.port_change = UGETW(ps.wPortChange);
311
312 /* debugging print */
313
314 DPRINTFN(4, "port %d, wPortStatus=0x%04x, "
315 "wPortChange=0x%04x, err=%s\n",
316 portno, sc->sc_st.port_status,
317 sc->sc_st.port_change, usbd_errstr(err));
318 return (err);
319}
320
321/*------------------------------------------------------------------------*
322 * uhub_reattach_port
323 *
324 * Returns:
325 * 0: Success
326 * Else: A control transaction failed
327 *------------------------------------------------------------------------*/
328static usb_error_t
329uhub_reattach_port(struct uhub_softc *sc, uint8_t portno)
330{
331 struct usb_device *child;
332 struct usb_device *udev;
333 enum usb_dev_speed speed;
334 enum usb_hc_mode mode;
335 usb_error_t err;
336 uint16_t power_mask;
337 uint8_t timeout;
338
339 DPRINTF("reattaching port %d\n", portno);
340
341 err = 0;
342 timeout = 0;
343 udev = sc->sc_udev;
344 child = usb_bus_port_get_device(udev->bus,
345 udev->hub->ports + portno - 1);
346
347repeat:
348
349 /* first clear the port connection change bit */
350
351 err = usbd_req_clear_port_feature(udev, NULL,
352 portno, UHF_C_PORT_CONNECTION);
353
354 if (err) {
355 goto error;
356 }
357 /* check if there is a child */
358
359 if (child != NULL) {
360 /*
361 * Free USB device and all subdevices, if any.
362 */
363 usb_free_device(child, 0);
364 child = NULL;
365 }
366 /* get fresh status */
367
368 err = uhub_read_port_status(sc, portno);
369 if (err) {
370 goto error;
371 }
372 /* check if nothing is connected to the port */
373
374 if (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS)) {
375 goto error;
376 }
377 /* check if there is no power on the port and print a warning */
378
379 switch (udev->speed) {
380 case USB_SPEED_HIGH:
381 case USB_SPEED_FULL:
382 case USB_SPEED_LOW:
383 power_mask = UPS_PORT_POWER;
384 break;
385 case USB_SPEED_SUPER:
386 if (udev->parent_hub == NULL)
387 power_mask = UPS_PORT_POWER;
388 else
389 power_mask = UPS_PORT_POWER_SS;
390 break;
391 default:
392 power_mask = 0;
393 break;
394 }
395 if (!(sc->sc_st.port_status & power_mask)) {
396 DPRINTF("WARNING: strange, connected port %d "
397 "has no power\n", portno);
398 }
399
400 /* check if the device is in Host Mode */
401
402 if (!(sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)) {
403
404 DPRINTF("Port %d is in Host Mode\n", portno);
405
406 if (sc->sc_st.port_status & UPS_SUSPEND) {
407 /*
408 * NOTE: Should not get here in SuperSpeed
409 * mode, because the HUB should report this
410 * bit as zero.
411 */
412 DPRINTF("Port %d was still "
413 "suspended, clearing.\n", portno);
414 err = usbd_req_clear_port_feature(udev,
415 NULL, portno, UHF_PORT_SUSPEND);
416 }
417
418 /* USB Host Mode */
419
420 /* wait for maximum device power up time */
421
422 usb_pause_mtx(NULL,
423 USB_MS_TO_TICKS(usb_port_powerup_delay));
424
425 /* reset port, which implies enabling it */
426
427 err = usbd_req_reset_port(udev, NULL, portno);
428
429 if (err) {
430 DPRINTFN(0, "port %d reset "
431 "failed, error=%s\n",
432 portno, usbd_errstr(err));
433 goto error;
434 }
435 /* get port status again, it might have changed during reset */
436
437 err = uhub_read_port_status(sc, portno);
438 if (err) {
439 goto error;
440 }
441 /* check if something changed during port reset */
442
443 if ((sc->sc_st.port_change & UPS_C_CONNECT_STATUS) ||
444 (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))) {
445 if (timeout) {
446 DPRINTFN(0, "giving up port reset "
447 "- device vanished\n");
448 goto error;
449 }
450 timeout = 1;
451 goto repeat;
452 }
453 } else {
454 DPRINTF("Port %d is in Device Mode\n", portno);
455 }
456
457 /*
458 * Figure out the device speed
459 */
460 switch (udev->speed) {
461 case USB_SPEED_HIGH:
462 if (sc->sc_st.port_status & UPS_HIGH_SPEED)
463 speed = USB_SPEED_HIGH;
464 else if (sc->sc_st.port_status & UPS_LOW_SPEED)
465 speed = USB_SPEED_LOW;
466 else
467 speed = USB_SPEED_FULL;
468 break;
469 case USB_SPEED_FULL:
470 if (sc->sc_st.port_status & UPS_LOW_SPEED)
471 speed = USB_SPEED_LOW;
472 else
473 speed = USB_SPEED_FULL;
474 break;
475 case USB_SPEED_LOW:
476 speed = USB_SPEED_LOW;
477 break;
478 case USB_SPEED_SUPER:
479 if (udev->parent_hub == NULL) {
480 /* Root HUB - special case */
481 switch (sc->sc_st.port_status & UPS_OTHER_SPEED) {
482 case 0:
483 speed = USB_SPEED_FULL;
484 break;
485 case UPS_LOW_SPEED:
486 speed = USB_SPEED_LOW;
487 break;
488 case UPS_HIGH_SPEED:
489 speed = USB_SPEED_HIGH;
490 break;
491 default:
492 speed = USB_SPEED_SUPER;
493 break;
494 }
495 } else {
496 speed = USB_SPEED_SUPER;
497 }
498 break;
499 default:
500 /* same speed like parent */
501 speed = udev->speed;
502 break;
503 }
504 if (speed == USB_SPEED_SUPER) {
505 err = usbd_req_set_hub_u1_timeout(udev, NULL,
506 portno, 128 - (2 * udev->depth));
507 if (err) {
508 DPRINTFN(0, "port %d U1 timeout "
509 "failed, error=%s\n",
510 portno, usbd_errstr(err));
511 }
512 err = usbd_req_set_hub_u2_timeout(udev, NULL,
513 portno, 128 - (2 * udev->depth));
514 if (err) {
515 DPRINTFN(0, "port %d U2 timeout "
516 "failed, error=%s\n",
517 portno, usbd_errstr(err));
518 }
519 }
520
521 /*
522 * Figure out the device mode
523 *
524 * NOTE: This part is currently FreeBSD specific.
525 */
526 if (udev->parent_hub != NULL) {
527 /* inherit mode from the parent HUB */
528 mode = udev->parent_hub->flags.usb_mode;
529 } else if (sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)
530 mode = USB_MODE_DEVICE;
531 else
532 mode = USB_MODE_HOST;
533
534 /* need to create a new child */
535 child = usb_alloc_device(sc->sc_dev, udev->bus, udev,
536 udev->depth + 1, portno - 1, portno, speed, mode);
537 if (child == NULL) {
538 DPRINTFN(0, "could not allocate new device\n");
539 goto error;
540 }
541 return (0); /* success */
542
543error:
544 if (child != NULL) {
545 /*
546 * Free USB device and all subdevices, if any.
547 */
548 usb_free_device(child, 0);
549 child = NULL;
550 }
551 if (err == 0) {
552 if (sc->sc_st.port_status & UPS_PORT_ENABLED) {
553 err = usbd_req_clear_port_feature(
554 sc->sc_udev, NULL,
555 portno, UHF_PORT_ENABLE);
556 }
557 }
558 if (err) {
559 DPRINTFN(0, "device problem (%s), "
560 "disabling port %d\n", usbd_errstr(err), portno);
561 }
562 return (err);
563}
564
565/*------------------------------------------------------------------------*
566 * usb_device_20_compatible
567 *
568 * Returns:
569 * 0: HUB does not support suspend and resume
570 * Else: HUB supports suspend and resume
571 *------------------------------------------------------------------------*/
572static uint8_t
573usb_device_20_compatible(struct usb_device *udev)
574{
575 if (udev == NULL)
576 return (0);
577 switch (udev->speed) {
578 case USB_SPEED_LOW:
579 case USB_SPEED_FULL:
580 case USB_SPEED_HIGH:
581 return (1);
582 default:
583 return (0);
584 }
585}
586
587/*------------------------------------------------------------------------*
588 * uhub_suspend_resume_port
589 *
590 * Returns:
591 * 0: Success
592 * Else: A control transaction failed
593 *------------------------------------------------------------------------*/
594static usb_error_t
595uhub_suspend_resume_port(struct uhub_softc *sc, uint8_t portno)
596{
597 struct usb_device *child;
598 struct usb_device *udev;
599 uint8_t is_suspend;
600 usb_error_t err;
601
602 DPRINTF("port %d\n", portno);
603
604 udev = sc->sc_udev;
605 child = usb_bus_port_get_device(udev->bus,
606 udev->hub->ports + portno - 1);
607
608 /* first clear the port suspend change bit */
609
610 if (usb_device_20_compatible(udev)) {
611 err = usbd_req_clear_port_feature(udev, NULL,
612 portno, UHF_C_PORT_SUSPEND);
613 } else {
614 err = usbd_req_clear_port_feature(udev, NULL,
615 portno, UHF_C_PORT_LINK_STATE);
616 }
617
618 if (err) {
619 DPRINTF("clearing suspend failed.\n");
620 goto done;
621 }
622 /* get fresh status */
623
624 err = uhub_read_port_status(sc, portno);
625 if (err) {
626 DPRINTF("reading port status failed.\n");
627 goto done;
628 }
629 /* convert current state */
630
631 if (usb_device_20_compatible(udev)) {
632 if (sc->sc_st.port_status & UPS_SUSPEND) {
633 is_suspend = 1;
634 } else {
635 is_suspend = 0;
636 }
637 } else {
638 switch (UPS_PORT_LINK_STATE_GET(sc->sc_st.port_status)) {
639 case UPS_PORT_LS_U3:
640 is_suspend = 1;
641 break;
642 case UPS_PORT_LS_SS_INA:
643 usbd_req_warm_reset_port(udev, NULL, portno);
644 is_suspend = 0;
645 break;
646 default:
647 is_suspend = 0;
648 break;
649 }
650 }
651
652 DPRINTF("suspended=%u\n", is_suspend);
653
654 /* do the suspend or resume */
655
656 if (child) {
657 /*
658 * This code handle two cases: 1) Host Mode - we can only
659 * receive resume here 2) Device Mode - we can receive
660 * suspend and resume here
661 */
662 if (is_suspend == 0)
663 usb_dev_resume_peer(child);
664 else if (child->flags.usb_mode == USB_MODE_DEVICE)
665 usb_dev_suspend_peer(child);
666 }
667done:
668 return (err);
669}
670
671/*------------------------------------------------------------------------*
672 * uhub_root_interrupt
673 *
674 * This function is called when a Root HUB interrupt has
675 * happened. "ptr" and "len" makes up the Root HUB interrupt
676 * packet. This function is called having the "bus_mtx" locked.
677 *------------------------------------------------------------------------*/
678void
679uhub_root_intr(struct usb_bus *bus, const uint8_t *ptr, uint8_t len)
680{
681 USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
682
683 usb_needs_explore(bus, 0);
684}
685
686static uint8_t
687uhub_is_too_deep(struct usb_device *udev)
688{
689 switch (udev->speed) {
690 case USB_SPEED_FULL:
691 case USB_SPEED_LOW:
692 case USB_SPEED_HIGH:
693 if (udev->depth > USB_HUB_MAX_DEPTH)
694 return (1);
695 break;
696 case USB_SPEED_SUPER:
697 if (udev->depth > USB_SS_HUB_DEPTH_MAX)
698 return (1);
699 break;
700 default:
701 break;
702 }
703 return (0);
704}
705
706/*------------------------------------------------------------------------*
707 * uhub_explore
708 *
709 * Returns:
710 * 0: Success
711 * Else: Failure
712 *------------------------------------------------------------------------*/
713static usb_error_t
714uhub_explore(struct usb_device *udev)
715{
716 struct usb_hub *hub;
717 struct uhub_softc *sc;
718 struct usb_port *up;
719 usb_error_t err;
720 uint8_t portno;
721 uint8_t x;
722 uint8_t do_unlock;
723
724 hub = udev->hub;
725 sc = hub->hubsoftc;
726
727 DPRINTFN(11, "udev=%p addr=%d\n", udev, udev->address);
728
729 /* ignore devices that are too deep */
730 if (uhub_is_too_deep(udev))
731 return (USB_ERR_TOO_DEEP);
732
733 /* check if device is suspended */
734 if (udev->flags.self_suspended) {
735 /* need to wait until the child signals resume */
736 DPRINTF("Device is suspended!\n");
737 return (0);
738 }
739
740 /*
741 * Make sure we don't race against user-space applications
742 * like LibUSB:
743 */
744 do_unlock = usbd_enum_lock(udev);
745
746 for (x = 0; x != hub->nports; x++) {
747 up = hub->ports + x;
748 portno = x + 1;
749
750 err = uhub_read_port_status(sc, portno);
751 if (err) {
752 /* most likely the HUB is gone */
753 break;
754 }
755 if (sc->sc_st.port_change & UPS_C_OVERCURRENT_INDICATOR) {
756 DPRINTF("Overcurrent on port %u.\n", portno);
757 err = usbd_req_clear_port_feature(
758 udev, NULL, portno, UHF_C_PORT_OVER_CURRENT);
759 if (err) {
760 /* most likely the HUB is gone */
761 break;
762 }
763 }
764 if (!(sc->sc_flags & UHUB_FLAG_DID_EXPLORE)) {
765 /*
766 * Fake a connect status change so that the
767 * status gets checked initially!
768 */
769 sc->sc_st.port_change |=
770 UPS_C_CONNECT_STATUS;
771 }
772 if (sc->sc_st.port_change & UPS_C_PORT_ENABLED) {
773 err = usbd_req_clear_port_feature(
774 udev, NULL, portno, UHF_C_PORT_ENABLE);
775 if (err) {
776 /* most likely the HUB is gone */
777 break;
778 }
779 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) {
780 /*
781 * Ignore the port error if the device
782 * has vanished !
783 */
784 } else if (sc->sc_st.port_status & UPS_PORT_ENABLED) {
785 DPRINTFN(0, "illegal enable change, "
786 "port %d\n", portno);
787 } else {
788
789 if (up->restartcnt == USB_RESTART_MAX) {
790 /* XXX could try another speed ? */
791 DPRINTFN(0, "port error, giving up "
792 "port %d\n", portno);
793 } else {
794 sc->sc_st.port_change |=
795 UPS_C_CONNECT_STATUS;
796 up->restartcnt++;
797 }
798 }
799 }
800 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) {
801 err = uhub_reattach_port(sc, portno);
802 if (err) {
803 /* most likely the HUB is gone */
804 break;
805 }
806 }
807 if (sc->sc_st.port_change & (UPS_C_SUSPEND |
808 UPS_C_PORT_LINK_STATE)) {
809 err = uhub_suspend_resume_port(sc, portno);
810 if (err) {
811 /* most likely the HUB is gone */
812 break;
813 }
814 }
815 err = uhub_explore_sub(sc, up);
816 if (err) {
817 /* no device(s) present */
818 continue;
819 }
820 /* explore succeeded - reset restart counter */
821 up->restartcnt = 0;
822 }
823
824 if (do_unlock)
825 usbd_enum_unlock(udev);
826
827 /* initial status checked */
828 sc->sc_flags |= UHUB_FLAG_DID_EXPLORE;
829
830 /* return success */
831 return (USB_ERR_NORMAL_COMPLETION);
832}
833
834static int
835uhub_probe(device_t dev)
836{
837 struct usb_attach_arg *uaa = device_get_ivars(dev);
838
839 if (uaa->usb_mode != USB_MODE_HOST)
840 return (ENXIO);
841
842 /*
843 * The subclass for USB HUBs is currently ignored because it
844 * is 0 for some and 1 for others.
845 */
846 if (uaa->info.bConfigIndex == 0 &&
847 uaa->info.bDeviceClass == UDCLASS_HUB)
848 return (0);
849
850 return (ENXIO);
851}
852
853/* NOTE: The information returned by this function can be wrong. */
854usb_error_t
855uhub_query_info(struct usb_device *udev, uint8_t *pnports, uint8_t *ptt)
856{
857 struct usb_hub_descriptor hubdesc20;
858 struct usb_hub_ss_descriptor hubdesc30;
859 usb_error_t err;
860 uint8_t nports;
861 uint8_t tt;
862
863 if (udev->ddesc.bDeviceClass != UDCLASS_HUB)
864 return (USB_ERR_INVAL);
865
866 nports = 0;
867 tt = 0;
868
869 switch (udev->speed) {
870 case USB_SPEED_LOW:
871 case USB_SPEED_FULL:
872 case USB_SPEED_HIGH:
873 /* assuming that there is one port */
874 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1);
875 if (err) {
876 DPRINTFN(0, "getting USB 2.0 HUB descriptor failed,"
877 "error=%s\n", usbd_errstr(err));
878 break;
879 }
880 nports = hubdesc20.bNbrPorts;
881 if (nports > 127)
882 nports = 127;
883
884 if (udev->speed == USB_SPEED_HIGH)
885 tt = (UGETW(hubdesc20.wHubCharacteristics) >> 5) & 3;
886 break;
887
888 case USB_SPEED_SUPER:
889 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1);
890 if (err) {
891 DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed,"
892 "error=%s\n", usbd_errstr(err));
893 break;
894 }
895 nports = hubdesc30.bNbrPorts;
896 if (nports > 16)
897 nports = 16;
898 break;
899
900 default:
901 err = USB_ERR_INVAL;
902 break;
903 }
904
905 if (pnports != NULL)
906 *pnports = nports;
907
908 if (ptt != NULL)
909 *ptt = tt;
910
911 return (err);
912}
913
914static int
915uhub_attach(device_t dev)
916{
917 struct uhub_softc *sc = device_get_softc(dev);
918 struct usb_attach_arg *uaa = device_get_ivars(dev);
919 struct usb_device *udev = uaa->device;
920 struct usb_device *parent_hub = udev->parent_hub;
921 struct usb_hub *hub;
922 struct usb_hub_descriptor hubdesc20;
923 struct usb_hub_ss_descriptor hubdesc30;
924 uint16_t pwrdly;
| 106 device_t sc_dev; /* base device */
107 struct mtx sc_mtx; /* our mutex */
108 struct usb_device *sc_udev; /* USB device */
109 struct usb_xfer *sc_xfer[UHUB_N_TRANSFER]; /* interrupt xfer */
110 uint8_t sc_flags;
111#define UHUB_FLAG_DID_EXPLORE 0x01
112};
113
114#define UHUB_PROTO(sc) ((sc)->sc_udev->ddesc.bDeviceProtocol)
115#define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB)
116#define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT)
117#define UHUB_IS_MULTI_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBMTT)
118#define UHUB_IS_SUPER_SPEED(sc) (UHUB_PROTO(sc) == UDPROTO_SSHUB)
119
120/* prototypes for type checking: */
121
122static device_probe_t uhub_probe;
123static device_attach_t uhub_attach;
124static device_detach_t uhub_detach;
125static device_suspend_t uhub_suspend;
126static device_resume_t uhub_resume;
127
128static bus_driver_added_t uhub_driver_added;
129static bus_child_location_str_t uhub_child_location_string;
130static bus_child_pnpinfo_str_t uhub_child_pnpinfo_string;
131
132static usb_callback_t uhub_intr_callback;
133
134static void usb_dev_resume_peer(struct usb_device *udev);
135static void usb_dev_suspend_peer(struct usb_device *udev);
136static uint8_t usb_peer_should_wakeup(struct usb_device *udev);
137
138static const struct usb_config uhub_config[UHUB_N_TRANSFER] = {
139
140 [0] = {
141 .type = UE_INTERRUPT,
142 .endpoint = UE_ADDR_ANY,
143 .direction = UE_DIR_ANY,
144 .timeout = 0,
145 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
146 .bufsize = 0, /* use wMaxPacketSize */
147 .callback = &uhub_intr_callback,
148 .interval = UHUB_INTR_INTERVAL,
149 },
150};
151
152/*
153 * driver instance for "hub" connected to "usb"
154 * and "hub" connected to "hub"
155 */
156static devclass_t uhub_devclass;
157
158static device_method_t uhub_methods[] = {
159 DEVMETHOD(device_probe, uhub_probe),
160 DEVMETHOD(device_attach, uhub_attach),
161 DEVMETHOD(device_detach, uhub_detach),
162
163 DEVMETHOD(device_suspend, uhub_suspend),
164 DEVMETHOD(device_resume, uhub_resume),
165
166 DEVMETHOD(bus_child_location_str, uhub_child_location_string),
167 DEVMETHOD(bus_child_pnpinfo_str, uhub_child_pnpinfo_string),
168 DEVMETHOD(bus_driver_added, uhub_driver_added),
169 DEVMETHOD_END
170};
171
172static driver_t uhub_driver = {
173 .name = "uhub",
174 .methods = uhub_methods,
175 .size = sizeof(struct uhub_softc)
176};
177
178DRIVER_MODULE(uhub, usbus, uhub_driver, uhub_devclass, 0, 0);
179DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, NULL, 0);
180MODULE_VERSION(uhub, 1);
181
182static void
183uhub_intr_callback(struct usb_xfer *xfer, usb_error_t error)
184{
185 struct uhub_softc *sc = usbd_xfer_softc(xfer);
186
187 switch (USB_GET_STATE(xfer)) {
188 case USB_ST_TRANSFERRED:
189 DPRINTFN(2, "\n");
190 /*
191 * This is an indication that some port
192 * has changed status. Notify the bus
193 * event handler thread that we need
194 * to be explored again:
195 */
196 usb_needs_explore(sc->sc_udev->bus, 0);
197
198 case USB_ST_SETUP:
199 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
200 usbd_transfer_submit(xfer);
201 break;
202
203 default: /* Error */
204 if (xfer->error != USB_ERR_CANCELLED) {
205 /*
206 * Do a clear-stall. The "stall_pipe" flag
207 * will get cleared before next callback by
208 * the USB stack.
209 */
210 usbd_xfer_set_stall(xfer);
211 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
212 usbd_transfer_submit(xfer);
213 }
214 break;
215 }
216}
217
218/*------------------------------------------------------------------------*
219 * uhub_explore_sub - subroutine
220 *
221 * Return values:
222 * 0: Success
223 * Else: A control transaction failed
224 *------------------------------------------------------------------------*/
225static usb_error_t
226uhub_explore_sub(struct uhub_softc *sc, struct usb_port *up)
227{
228 struct usb_bus *bus;
229 struct usb_device *child;
230 uint8_t refcount;
231 usb_error_t err;
232
233 bus = sc->sc_udev->bus;
234 err = 0;
235
236 /* get driver added refcount from USB bus */
237 refcount = bus->driver_added_refcount;
238
239 /* get device assosiated with the given port */
240 child = usb_bus_port_get_device(bus, up);
241 if (child == NULL) {
242 /* nothing to do */
243 goto done;
244 }
245
246 /* check if device should be re-enumerated */
247
248 if (child->flags.usb_mode == USB_MODE_HOST) {
249 uint8_t do_unlock;
250
251 do_unlock = usbd_enum_lock(child);
252 if (child->re_enumerate_wait) {
253 err = usbd_set_config_index(child,
254 USB_UNCONFIG_INDEX);
255 if (err != 0) {
256 DPRINTF("Unconfigure failed: "
257 "%s: Ignored.\n",
258 usbd_errstr(err));
259 }
260 err = usbd_req_re_enumerate(child, NULL);
261 if (err == 0)
262 err = usbd_set_config_index(child, 0);
263 if (err == 0) {
264 err = usb_probe_and_attach(child,
265 USB_IFACE_INDEX_ANY);
266 }
267 child->re_enumerate_wait = 0;
268 err = 0;
269 }
270 if (do_unlock)
271 usbd_enum_unlock(child);
272 }
273
274 /* check if probe and attach should be done */
275
276 if (child->driver_added_refcount != refcount) {
277 child->driver_added_refcount = refcount;
278 err = usb_probe_and_attach(child,
279 USB_IFACE_INDEX_ANY);
280 if (err) {
281 goto done;
282 }
283 }
284 /* start control transfer, if device mode */
285
286 if (child->flags.usb_mode == USB_MODE_DEVICE)
287 usbd_ctrl_transfer_setup(child);
288
289 /* if a HUB becomes present, do a recursive HUB explore */
290
291 if (child->hub)
292 err = (child->hub->explore) (child);
293
294done:
295 return (err);
296}
297
298/*------------------------------------------------------------------------*
299 * uhub_read_port_status - factored out code
300 *------------------------------------------------------------------------*/
301static usb_error_t
302uhub_read_port_status(struct uhub_softc *sc, uint8_t portno)
303{
304 struct usb_port_status ps;
305 usb_error_t err;
306
307 err = usbd_req_get_port_status(
308 sc->sc_udev, NULL, &ps, portno);
309
310 /* update status regardless of error */
311
312 sc->sc_st.port_status = UGETW(ps.wPortStatus);
313 sc->sc_st.port_change = UGETW(ps.wPortChange);
314
315 /* debugging print */
316
317 DPRINTFN(4, "port %d, wPortStatus=0x%04x, "
318 "wPortChange=0x%04x, err=%s\n",
319 portno, sc->sc_st.port_status,
320 sc->sc_st.port_change, usbd_errstr(err));
321 return (err);
322}
323
324/*------------------------------------------------------------------------*
325 * uhub_reattach_port
326 *
327 * Returns:
328 * 0: Success
329 * Else: A control transaction failed
330 *------------------------------------------------------------------------*/
331static usb_error_t
332uhub_reattach_port(struct uhub_softc *sc, uint8_t portno)
333{
334 struct usb_device *child;
335 struct usb_device *udev;
336 enum usb_dev_speed speed;
337 enum usb_hc_mode mode;
338 usb_error_t err;
339 uint16_t power_mask;
340 uint8_t timeout;
341
342 DPRINTF("reattaching port %d\n", portno);
343
344 err = 0;
345 timeout = 0;
346 udev = sc->sc_udev;
347 child = usb_bus_port_get_device(udev->bus,
348 udev->hub->ports + portno - 1);
349
350repeat:
351
352 /* first clear the port connection change bit */
353
354 err = usbd_req_clear_port_feature(udev, NULL,
355 portno, UHF_C_PORT_CONNECTION);
356
357 if (err) {
358 goto error;
359 }
360 /* check if there is a child */
361
362 if (child != NULL) {
363 /*
364 * Free USB device and all subdevices, if any.
365 */
366 usb_free_device(child, 0);
367 child = NULL;
368 }
369 /* get fresh status */
370
371 err = uhub_read_port_status(sc, portno);
372 if (err) {
373 goto error;
374 }
375 /* check if nothing is connected to the port */
376
377 if (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS)) {
378 goto error;
379 }
380 /* check if there is no power on the port and print a warning */
381
382 switch (udev->speed) {
383 case USB_SPEED_HIGH:
384 case USB_SPEED_FULL:
385 case USB_SPEED_LOW:
386 power_mask = UPS_PORT_POWER;
387 break;
388 case USB_SPEED_SUPER:
389 if (udev->parent_hub == NULL)
390 power_mask = UPS_PORT_POWER;
391 else
392 power_mask = UPS_PORT_POWER_SS;
393 break;
394 default:
395 power_mask = 0;
396 break;
397 }
398 if (!(sc->sc_st.port_status & power_mask)) {
399 DPRINTF("WARNING: strange, connected port %d "
400 "has no power\n", portno);
401 }
402
403 /* check if the device is in Host Mode */
404
405 if (!(sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)) {
406
407 DPRINTF("Port %d is in Host Mode\n", portno);
408
409 if (sc->sc_st.port_status & UPS_SUSPEND) {
410 /*
411 * NOTE: Should not get here in SuperSpeed
412 * mode, because the HUB should report this
413 * bit as zero.
414 */
415 DPRINTF("Port %d was still "
416 "suspended, clearing.\n", portno);
417 err = usbd_req_clear_port_feature(udev,
418 NULL, portno, UHF_PORT_SUSPEND);
419 }
420
421 /* USB Host Mode */
422
423 /* wait for maximum device power up time */
424
425 usb_pause_mtx(NULL,
426 USB_MS_TO_TICKS(usb_port_powerup_delay));
427
428 /* reset port, which implies enabling it */
429
430 err = usbd_req_reset_port(udev, NULL, portno);
431
432 if (err) {
433 DPRINTFN(0, "port %d reset "
434 "failed, error=%s\n",
435 portno, usbd_errstr(err));
436 goto error;
437 }
438 /* get port status again, it might have changed during reset */
439
440 err = uhub_read_port_status(sc, portno);
441 if (err) {
442 goto error;
443 }
444 /* check if something changed during port reset */
445
446 if ((sc->sc_st.port_change & UPS_C_CONNECT_STATUS) ||
447 (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))) {
448 if (timeout) {
449 DPRINTFN(0, "giving up port reset "
450 "- device vanished\n");
451 goto error;
452 }
453 timeout = 1;
454 goto repeat;
455 }
456 } else {
457 DPRINTF("Port %d is in Device Mode\n", portno);
458 }
459
460 /*
461 * Figure out the device speed
462 */
463 switch (udev->speed) {
464 case USB_SPEED_HIGH:
465 if (sc->sc_st.port_status & UPS_HIGH_SPEED)
466 speed = USB_SPEED_HIGH;
467 else if (sc->sc_st.port_status & UPS_LOW_SPEED)
468 speed = USB_SPEED_LOW;
469 else
470 speed = USB_SPEED_FULL;
471 break;
472 case USB_SPEED_FULL:
473 if (sc->sc_st.port_status & UPS_LOW_SPEED)
474 speed = USB_SPEED_LOW;
475 else
476 speed = USB_SPEED_FULL;
477 break;
478 case USB_SPEED_LOW:
479 speed = USB_SPEED_LOW;
480 break;
481 case USB_SPEED_SUPER:
482 if (udev->parent_hub == NULL) {
483 /* Root HUB - special case */
484 switch (sc->sc_st.port_status & UPS_OTHER_SPEED) {
485 case 0:
486 speed = USB_SPEED_FULL;
487 break;
488 case UPS_LOW_SPEED:
489 speed = USB_SPEED_LOW;
490 break;
491 case UPS_HIGH_SPEED:
492 speed = USB_SPEED_HIGH;
493 break;
494 default:
495 speed = USB_SPEED_SUPER;
496 break;
497 }
498 } else {
499 speed = USB_SPEED_SUPER;
500 }
501 break;
502 default:
503 /* same speed like parent */
504 speed = udev->speed;
505 break;
506 }
507 if (speed == USB_SPEED_SUPER) {
508 err = usbd_req_set_hub_u1_timeout(udev, NULL,
509 portno, 128 - (2 * udev->depth));
510 if (err) {
511 DPRINTFN(0, "port %d U1 timeout "
512 "failed, error=%s\n",
513 portno, usbd_errstr(err));
514 }
515 err = usbd_req_set_hub_u2_timeout(udev, NULL,
516 portno, 128 - (2 * udev->depth));
517 if (err) {
518 DPRINTFN(0, "port %d U2 timeout "
519 "failed, error=%s\n",
520 portno, usbd_errstr(err));
521 }
522 }
523
524 /*
525 * Figure out the device mode
526 *
527 * NOTE: This part is currently FreeBSD specific.
528 */
529 if (udev->parent_hub != NULL) {
530 /* inherit mode from the parent HUB */
531 mode = udev->parent_hub->flags.usb_mode;
532 } else if (sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)
533 mode = USB_MODE_DEVICE;
534 else
535 mode = USB_MODE_HOST;
536
537 /* need to create a new child */
538 child = usb_alloc_device(sc->sc_dev, udev->bus, udev,
539 udev->depth + 1, portno - 1, portno, speed, mode);
540 if (child == NULL) {
541 DPRINTFN(0, "could not allocate new device\n");
542 goto error;
543 }
544 return (0); /* success */
545
546error:
547 if (child != NULL) {
548 /*
549 * Free USB device and all subdevices, if any.
550 */
551 usb_free_device(child, 0);
552 child = NULL;
553 }
554 if (err == 0) {
555 if (sc->sc_st.port_status & UPS_PORT_ENABLED) {
556 err = usbd_req_clear_port_feature(
557 sc->sc_udev, NULL,
558 portno, UHF_PORT_ENABLE);
559 }
560 }
561 if (err) {
562 DPRINTFN(0, "device problem (%s), "
563 "disabling port %d\n", usbd_errstr(err), portno);
564 }
565 return (err);
566}
567
568/*------------------------------------------------------------------------*
569 * usb_device_20_compatible
570 *
571 * Returns:
572 * 0: HUB does not support suspend and resume
573 * Else: HUB supports suspend and resume
574 *------------------------------------------------------------------------*/
575static uint8_t
576usb_device_20_compatible(struct usb_device *udev)
577{
578 if (udev == NULL)
579 return (0);
580 switch (udev->speed) {
581 case USB_SPEED_LOW:
582 case USB_SPEED_FULL:
583 case USB_SPEED_HIGH:
584 return (1);
585 default:
586 return (0);
587 }
588}
589
590/*------------------------------------------------------------------------*
591 * uhub_suspend_resume_port
592 *
593 * Returns:
594 * 0: Success
595 * Else: A control transaction failed
596 *------------------------------------------------------------------------*/
597static usb_error_t
598uhub_suspend_resume_port(struct uhub_softc *sc, uint8_t portno)
599{
600 struct usb_device *child;
601 struct usb_device *udev;
602 uint8_t is_suspend;
603 usb_error_t err;
604
605 DPRINTF("port %d\n", portno);
606
607 udev = sc->sc_udev;
608 child = usb_bus_port_get_device(udev->bus,
609 udev->hub->ports + portno - 1);
610
611 /* first clear the port suspend change bit */
612
613 if (usb_device_20_compatible(udev)) {
614 err = usbd_req_clear_port_feature(udev, NULL,
615 portno, UHF_C_PORT_SUSPEND);
616 } else {
617 err = usbd_req_clear_port_feature(udev, NULL,
618 portno, UHF_C_PORT_LINK_STATE);
619 }
620
621 if (err) {
622 DPRINTF("clearing suspend failed.\n");
623 goto done;
624 }
625 /* get fresh status */
626
627 err = uhub_read_port_status(sc, portno);
628 if (err) {
629 DPRINTF("reading port status failed.\n");
630 goto done;
631 }
632 /* convert current state */
633
634 if (usb_device_20_compatible(udev)) {
635 if (sc->sc_st.port_status & UPS_SUSPEND) {
636 is_suspend = 1;
637 } else {
638 is_suspend = 0;
639 }
640 } else {
641 switch (UPS_PORT_LINK_STATE_GET(sc->sc_st.port_status)) {
642 case UPS_PORT_LS_U3:
643 is_suspend = 1;
644 break;
645 case UPS_PORT_LS_SS_INA:
646 usbd_req_warm_reset_port(udev, NULL, portno);
647 is_suspend = 0;
648 break;
649 default:
650 is_suspend = 0;
651 break;
652 }
653 }
654
655 DPRINTF("suspended=%u\n", is_suspend);
656
657 /* do the suspend or resume */
658
659 if (child) {
660 /*
661 * This code handle two cases: 1) Host Mode - we can only
662 * receive resume here 2) Device Mode - we can receive
663 * suspend and resume here
664 */
665 if (is_suspend == 0)
666 usb_dev_resume_peer(child);
667 else if (child->flags.usb_mode == USB_MODE_DEVICE)
668 usb_dev_suspend_peer(child);
669 }
670done:
671 return (err);
672}
673
674/*------------------------------------------------------------------------*
675 * uhub_root_interrupt
676 *
677 * This function is called when a Root HUB interrupt has
678 * happened. "ptr" and "len" makes up the Root HUB interrupt
679 * packet. This function is called having the "bus_mtx" locked.
680 *------------------------------------------------------------------------*/
681void
682uhub_root_intr(struct usb_bus *bus, const uint8_t *ptr, uint8_t len)
683{
684 USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
685
686 usb_needs_explore(bus, 0);
687}
688
689static uint8_t
690uhub_is_too_deep(struct usb_device *udev)
691{
692 switch (udev->speed) {
693 case USB_SPEED_FULL:
694 case USB_SPEED_LOW:
695 case USB_SPEED_HIGH:
696 if (udev->depth > USB_HUB_MAX_DEPTH)
697 return (1);
698 break;
699 case USB_SPEED_SUPER:
700 if (udev->depth > USB_SS_HUB_DEPTH_MAX)
701 return (1);
702 break;
703 default:
704 break;
705 }
706 return (0);
707}
708
709/*------------------------------------------------------------------------*
710 * uhub_explore
711 *
712 * Returns:
713 * 0: Success
714 * Else: Failure
715 *------------------------------------------------------------------------*/
716static usb_error_t
717uhub_explore(struct usb_device *udev)
718{
719 struct usb_hub *hub;
720 struct uhub_softc *sc;
721 struct usb_port *up;
722 usb_error_t err;
723 uint8_t portno;
724 uint8_t x;
725 uint8_t do_unlock;
726
727 hub = udev->hub;
728 sc = hub->hubsoftc;
729
730 DPRINTFN(11, "udev=%p addr=%d\n", udev, udev->address);
731
732 /* ignore devices that are too deep */
733 if (uhub_is_too_deep(udev))
734 return (USB_ERR_TOO_DEEP);
735
736 /* check if device is suspended */
737 if (udev->flags.self_suspended) {
738 /* need to wait until the child signals resume */
739 DPRINTF("Device is suspended!\n");
740 return (0);
741 }
742
743 /*
744 * Make sure we don't race against user-space applications
745 * like LibUSB:
746 */
747 do_unlock = usbd_enum_lock(udev);
748
749 for (x = 0; x != hub->nports; x++) {
750 up = hub->ports + x;
751 portno = x + 1;
752
753 err = uhub_read_port_status(sc, portno);
754 if (err) {
755 /* most likely the HUB is gone */
756 break;
757 }
758 if (sc->sc_st.port_change & UPS_C_OVERCURRENT_INDICATOR) {
759 DPRINTF("Overcurrent on port %u.\n", portno);
760 err = usbd_req_clear_port_feature(
761 udev, NULL, portno, UHF_C_PORT_OVER_CURRENT);
762 if (err) {
763 /* most likely the HUB is gone */
764 break;
765 }
766 }
767 if (!(sc->sc_flags & UHUB_FLAG_DID_EXPLORE)) {
768 /*
769 * Fake a connect status change so that the
770 * status gets checked initially!
771 */
772 sc->sc_st.port_change |=
773 UPS_C_CONNECT_STATUS;
774 }
775 if (sc->sc_st.port_change & UPS_C_PORT_ENABLED) {
776 err = usbd_req_clear_port_feature(
777 udev, NULL, portno, UHF_C_PORT_ENABLE);
778 if (err) {
779 /* most likely the HUB is gone */
780 break;
781 }
782 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) {
783 /*
784 * Ignore the port error if the device
785 * has vanished !
786 */
787 } else if (sc->sc_st.port_status & UPS_PORT_ENABLED) {
788 DPRINTFN(0, "illegal enable change, "
789 "port %d\n", portno);
790 } else {
791
792 if (up->restartcnt == USB_RESTART_MAX) {
793 /* XXX could try another speed ? */
794 DPRINTFN(0, "port error, giving up "
795 "port %d\n", portno);
796 } else {
797 sc->sc_st.port_change |=
798 UPS_C_CONNECT_STATUS;
799 up->restartcnt++;
800 }
801 }
802 }
803 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) {
804 err = uhub_reattach_port(sc, portno);
805 if (err) {
806 /* most likely the HUB is gone */
807 break;
808 }
809 }
810 if (sc->sc_st.port_change & (UPS_C_SUSPEND |
811 UPS_C_PORT_LINK_STATE)) {
812 err = uhub_suspend_resume_port(sc, portno);
813 if (err) {
814 /* most likely the HUB is gone */
815 break;
816 }
817 }
818 err = uhub_explore_sub(sc, up);
819 if (err) {
820 /* no device(s) present */
821 continue;
822 }
823 /* explore succeeded - reset restart counter */
824 up->restartcnt = 0;
825 }
826
827 if (do_unlock)
828 usbd_enum_unlock(udev);
829
830 /* initial status checked */
831 sc->sc_flags |= UHUB_FLAG_DID_EXPLORE;
832
833 /* return success */
834 return (USB_ERR_NORMAL_COMPLETION);
835}
836
837static int
838uhub_probe(device_t dev)
839{
840 struct usb_attach_arg *uaa = device_get_ivars(dev);
841
842 if (uaa->usb_mode != USB_MODE_HOST)
843 return (ENXIO);
844
845 /*
846 * The subclass for USB HUBs is currently ignored because it
847 * is 0 for some and 1 for others.
848 */
849 if (uaa->info.bConfigIndex == 0 &&
850 uaa->info.bDeviceClass == UDCLASS_HUB)
851 return (0);
852
853 return (ENXIO);
854}
855
856/* NOTE: The information returned by this function can be wrong. */
857usb_error_t
858uhub_query_info(struct usb_device *udev, uint8_t *pnports, uint8_t *ptt)
859{
860 struct usb_hub_descriptor hubdesc20;
861 struct usb_hub_ss_descriptor hubdesc30;
862 usb_error_t err;
863 uint8_t nports;
864 uint8_t tt;
865
866 if (udev->ddesc.bDeviceClass != UDCLASS_HUB)
867 return (USB_ERR_INVAL);
868
869 nports = 0;
870 tt = 0;
871
872 switch (udev->speed) {
873 case USB_SPEED_LOW:
874 case USB_SPEED_FULL:
875 case USB_SPEED_HIGH:
876 /* assuming that there is one port */
877 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1);
878 if (err) {
879 DPRINTFN(0, "getting USB 2.0 HUB descriptor failed,"
880 "error=%s\n", usbd_errstr(err));
881 break;
882 }
883 nports = hubdesc20.bNbrPorts;
884 if (nports > 127)
885 nports = 127;
886
887 if (udev->speed == USB_SPEED_HIGH)
888 tt = (UGETW(hubdesc20.wHubCharacteristics) >> 5) & 3;
889 break;
890
891 case USB_SPEED_SUPER:
892 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1);
893 if (err) {
894 DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed,"
895 "error=%s\n", usbd_errstr(err));
896 break;
897 }
898 nports = hubdesc30.bNbrPorts;
899 if (nports > 16)
900 nports = 16;
901 break;
902
903 default:
904 err = USB_ERR_INVAL;
905 break;
906 }
907
908 if (pnports != NULL)
909 *pnports = nports;
910
911 if (ptt != NULL)
912 *ptt = tt;
913
914 return (err);
915}
916
917static int
918uhub_attach(device_t dev)
919{
920 struct uhub_softc *sc = device_get_softc(dev);
921 struct usb_attach_arg *uaa = device_get_ivars(dev);
922 struct usb_device *udev = uaa->device;
923 struct usb_device *parent_hub = udev->parent_hub;
924 struct usb_hub *hub;
925 struct usb_hub_descriptor hubdesc20;
926 struct usb_hub_ss_descriptor hubdesc30;
927 uint16_t pwrdly;
|
| 928 uint16_t nports;
|
925 uint8_t x;
| 929 uint8_t x;
|
926 uint8_t nports;
| |
927 uint8_t portno;
928 uint8_t removable;
929 uint8_t iface_index;
930 usb_error_t err;
931
932 sc->sc_udev = udev;
933 sc->sc_dev = dev;
934
935 mtx_init(&sc->sc_mtx, "USB HUB mutex", NULL, MTX_DEF);
936
937 device_set_usb_desc(dev);
938
939 DPRINTFN(2, "depth=%d selfpowered=%d, parent=%p, "
940 "parent->selfpowered=%d\n",
941 udev->depth,
942 udev->flags.self_powered,
943 parent_hub,
944 parent_hub ?
945 parent_hub->flags.self_powered : 0);
946
947 if (uhub_is_too_deep(udev)) {
948 DPRINTFN(0, "HUB at depth %d, "
949 "exceeds maximum. HUB ignored\n", (int)udev->depth);
950 goto error;
951 }
952
953 if (!udev->flags.self_powered && parent_hub &&
954 !parent_hub->flags.self_powered) {
955 DPRINTFN(0, "Bus powered HUB connected to "
956 "bus powered HUB. HUB ignored\n");
957 goto error;
958 }
959
960 if (UHUB_IS_MULTI_TT(sc)) {
961 err = usbd_set_alt_interface_index(udev, 0, 1);
962 if (err) {
963 device_printf(dev, "MTT could not be enabled\n");
964 goto error;
965 }
966 device_printf(dev, "MTT enabled\n");
967 }
968
969 /* get HUB descriptor */
970
971 DPRINTFN(2, "Getting HUB descriptor\n");
972
973 switch (udev->speed) {
974 case USB_SPEED_LOW:
975 case USB_SPEED_FULL:
976 case USB_SPEED_HIGH:
977 /* assuming that there is one port */
978 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1);
979 if (err) {
980 DPRINTFN(0, "getting USB 2.0 HUB descriptor failed,"
981 "error=%s\n", usbd_errstr(err));
982 goto error;
983 }
984 /* get number of ports */
985 nports = hubdesc20.bNbrPorts;
986
987 /* get power delay */
988 pwrdly = ((hubdesc20.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
989 usb_extra_power_up_time);
990
991 /* get complete HUB descriptor */
992 if (nports >= 8) {
993 /* check number of ports */
994 if (nports > 127) {
995 DPRINTFN(0, "Invalid number of USB 2.0 ports,"
996 "error=%s\n", usbd_errstr(err));
997 goto error;
998 }
999 /* get complete HUB descriptor */
1000 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, nports);
1001
1002 if (err) {
1003 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed,"
1004 "error=%s\n", usbd_errstr(err));
1005 goto error;
1006 }
1007 if (hubdesc20.bNbrPorts != nports) {
1008 DPRINTFN(0, "Number of ports changed\n");
1009 goto error;
1010 }
1011 }
1012 break;
1013 case USB_SPEED_SUPER:
1014 if (udev->parent_hub != NULL) {
1015 err = usbd_req_set_hub_depth(udev, NULL,
1016 udev->depth - 1);
1017 if (err) {
1018 DPRINTFN(0, "Setting USB 3.0 HUB depth failed,"
1019 "error=%s\n", usbd_errstr(err));
1020 goto error;
1021 }
1022 }
1023 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1);
1024 if (err) {
1025 DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed,"
1026 "error=%s\n", usbd_errstr(err));
1027 goto error;
1028 }
1029 /* get number of ports */
1030 nports = hubdesc30.bNbrPorts;
1031
1032 /* get power delay */
1033 pwrdly = ((hubdesc30.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
1034 usb_extra_power_up_time);
1035
1036 /* get complete HUB descriptor */
1037 if (nports >= 8) {
1038 /* check number of ports */
1039 if (nports > ((udev->parent_hub != NULL) ? 15 : 127)) {
1040 DPRINTFN(0, "Invalid number of USB 3.0 ports,"
1041 "error=%s\n", usbd_errstr(err));
1042 goto error;
1043 }
1044 /* get complete HUB descriptor */
1045 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, nports);
1046
1047 if (err) {
1048 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed,"
1049 "error=%s\n", usbd_errstr(err));
1050 goto error;
1051 }
1052 if (hubdesc30.bNbrPorts != nports) {
1053 DPRINTFN(0, "Number of ports changed\n");
1054 goto error;
1055 }
1056 }
1057 break;
1058 default:
1059 DPRINTF("Assuming HUB has only one port\n");
1060 /* default number of ports */
1061 nports = 1;
1062 /* default power delay */
1063 pwrdly = ((10 * UHD_PWRON_FACTOR) + usb_extra_power_up_time);
1064 break;
1065 }
1066 if (nports == 0) {
1067 DPRINTFN(0, "portless HUB\n");
1068 goto error;
1069 }
| 930 uint8_t portno;
931 uint8_t removable;
932 uint8_t iface_index;
933 usb_error_t err;
934
935 sc->sc_udev = udev;
936 sc->sc_dev = dev;
937
938 mtx_init(&sc->sc_mtx, "USB HUB mutex", NULL, MTX_DEF);
939
940 device_set_usb_desc(dev);
941
942 DPRINTFN(2, "depth=%d selfpowered=%d, parent=%p, "
943 "parent->selfpowered=%d\n",
944 udev->depth,
945 udev->flags.self_powered,
946 parent_hub,
947 parent_hub ?
948 parent_hub->flags.self_powered : 0);
949
950 if (uhub_is_too_deep(udev)) {
951 DPRINTFN(0, "HUB at depth %d, "
952 "exceeds maximum. HUB ignored\n", (int)udev->depth);
953 goto error;
954 }
955
956 if (!udev->flags.self_powered && parent_hub &&
957 !parent_hub->flags.self_powered) {
958 DPRINTFN(0, "Bus powered HUB connected to "
959 "bus powered HUB. HUB ignored\n");
960 goto error;
961 }
962
963 if (UHUB_IS_MULTI_TT(sc)) {
964 err = usbd_set_alt_interface_index(udev, 0, 1);
965 if (err) {
966 device_printf(dev, "MTT could not be enabled\n");
967 goto error;
968 }
969 device_printf(dev, "MTT enabled\n");
970 }
971
972 /* get HUB descriptor */
973
974 DPRINTFN(2, "Getting HUB descriptor\n");
975
976 switch (udev->speed) {
977 case USB_SPEED_LOW:
978 case USB_SPEED_FULL:
979 case USB_SPEED_HIGH:
980 /* assuming that there is one port */
981 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1);
982 if (err) {
983 DPRINTFN(0, "getting USB 2.0 HUB descriptor failed,"
984 "error=%s\n", usbd_errstr(err));
985 goto error;
986 }
987 /* get number of ports */
988 nports = hubdesc20.bNbrPorts;
989
990 /* get power delay */
991 pwrdly = ((hubdesc20.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
992 usb_extra_power_up_time);
993
994 /* get complete HUB descriptor */
995 if (nports >= 8) {
996 /* check number of ports */
997 if (nports > 127) {
998 DPRINTFN(0, "Invalid number of USB 2.0 ports,"
999 "error=%s\n", usbd_errstr(err));
1000 goto error;
1001 }
1002 /* get complete HUB descriptor */
1003 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, nports);
1004
1005 if (err) {
1006 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed,"
1007 "error=%s\n", usbd_errstr(err));
1008 goto error;
1009 }
1010 if (hubdesc20.bNbrPorts != nports) {
1011 DPRINTFN(0, "Number of ports changed\n");
1012 goto error;
1013 }
1014 }
1015 break;
1016 case USB_SPEED_SUPER:
1017 if (udev->parent_hub != NULL) {
1018 err = usbd_req_set_hub_depth(udev, NULL,
1019 udev->depth - 1);
1020 if (err) {
1021 DPRINTFN(0, "Setting USB 3.0 HUB depth failed,"
1022 "error=%s\n", usbd_errstr(err));
1023 goto error;
1024 }
1025 }
1026 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1);
1027 if (err) {
1028 DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed,"
1029 "error=%s\n", usbd_errstr(err));
1030 goto error;
1031 }
1032 /* get number of ports */
1033 nports = hubdesc30.bNbrPorts;
1034
1035 /* get power delay */
1036 pwrdly = ((hubdesc30.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
1037 usb_extra_power_up_time);
1038
1039 /* get complete HUB descriptor */
1040 if (nports >= 8) {
1041 /* check number of ports */
1042 if (nports > ((udev->parent_hub != NULL) ? 15 : 127)) {
1043 DPRINTFN(0, "Invalid number of USB 3.0 ports,"
1044 "error=%s\n", usbd_errstr(err));
1045 goto error;
1046 }
1047 /* get complete HUB descriptor */
1048 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, nports);
1049
1050 if (err) {
1051 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed,"
1052 "error=%s\n", usbd_errstr(err));
1053 goto error;
1054 }
1055 if (hubdesc30.bNbrPorts != nports) {
1056 DPRINTFN(0, "Number of ports changed\n");
1057 goto error;
1058 }
1059 }
1060 break;
1061 default:
1062 DPRINTF("Assuming HUB has only one port\n");
1063 /* default number of ports */
1064 nports = 1;
1065 /* default power delay */
1066 pwrdly = ((10 * UHD_PWRON_FACTOR) + usb_extra_power_up_time);
1067 break;
1068 }
1069 if (nports == 0) {
1070 DPRINTFN(0, "portless HUB\n");
1071 goto error;
1072 }
|
| 1073 if (nports > USB_MAX_PORTS) {
1074 DPRINTF("Port limit exceeded\n");
1075 goto error;
1076 }
1077#if (USB_HAVE_FIXED_PORT == 0)
|
1070 hub = malloc(sizeof(hub[0]) + (sizeof(hub->ports[0]) * nports),
1071 M_USBDEV, M_WAITOK | M_ZERO);
1072
| 1078 hub = malloc(sizeof(hub[0]) + (sizeof(hub->ports[0]) * nports),
1079 M_USBDEV, M_WAITOK | M_ZERO);
1080
|
1073 if (hub == NULL) {
| 1081 if (hub == NULL)
|
1074 goto error;
| 1082 goto error;
|
1075 }
| 1083#else
1084 hub = &sc->sc_hub;
1085#endif
|
1076 udev->hub = hub;
1077
1078 /* initialize HUB structure */
1079 hub->hubsoftc = sc;
1080 hub->explore = &uhub_explore;
1081 hub->nports = nports;
1082 hub->hubudev = udev;
1083
1084 /* if self powered hub, give ports maximum current */
1085 if (udev->flags.self_powered) {
1086 hub->portpower = USB_MAX_POWER;
1087 } else {
1088 hub->portpower = USB_MIN_POWER;
1089 }
1090
1091 /* set up interrupt pipe */
1092 iface_index = 0;
1093 if (udev->parent_hub == NULL) {
1094 /* root HUB is special */
1095 err = 0;
1096 } else {
1097 /* normal HUB */
1098 err = usbd_transfer_setup(udev, &iface_index, sc->sc_xfer,
1099 uhub_config, UHUB_N_TRANSFER, sc, &sc->sc_mtx);
1100 }
1101 if (err) {
1102 DPRINTFN(0, "cannot setup interrupt transfer, "
1103 "errstr=%s\n", usbd_errstr(err));
1104 goto error;
1105 }
1106 /* wait with power off for a while */
1107 usb_pause_mtx(NULL, USB_MS_TO_TICKS(USB_POWER_DOWN_TIME));
1108
1109 /*
1110 * To have the best chance of success we do things in the exact same
1111 * order as Windoze98. This should not be necessary, but some
1112 * devices do not follow the USB specs to the letter.
1113 *
1114 * These are the events on the bus when a hub is attached:
1115 * Get device and config descriptors (see attach code)
1116 * Get hub descriptor (see above)
1117 * For all ports
1118 * turn on power
1119 * wait for power to become stable
1120 * (all below happens in explore code)
1121 * For all ports
1122 * clear C_PORT_CONNECTION
1123 * For all ports
1124 * get port status
1125 * if device connected
1126 * wait 100 ms
1127 * turn on reset
1128 * wait
1129 * clear C_PORT_RESET
1130 * get port status
1131 * proceed with device attachment
1132 */
1133
1134 /* XXX should check for none, individual, or ganged power? */
1135
1136 removable = 0;
1137
1138 for (x = 0; x != nports; x++) {
1139 /* set up data structures */
1140 struct usb_port *up = hub->ports + x;
1141
1142 up->device_index = 0;
1143 up->restartcnt = 0;
1144 portno = x + 1;
1145
1146 /* check if port is removable */
1147 switch (udev->speed) {
1148 case USB_SPEED_LOW:
1149 case USB_SPEED_FULL:
1150 case USB_SPEED_HIGH:
1151 if (!UHD_NOT_REMOV(&hubdesc20, portno))
1152 removable++;
1153 break;
1154 case USB_SPEED_SUPER:
1155 if (!UHD_NOT_REMOV(&hubdesc30, portno))
1156 removable++;
1157 break;
1158 default:
1159 DPRINTF("Assuming removable port\n");
1160 removable++;
1161 break;
1162 }
1163 if (!err) {
1164 /* turn the power on */
1165 err = usbd_req_set_port_feature(udev, NULL,
1166 portno, UHF_PORT_POWER);
1167 }
1168 if (err) {
1169 DPRINTFN(0, "port %d power on failed, %s\n",
1170 portno, usbd_errstr(err));
1171 }
1172 DPRINTF("turn on port %d power\n",
1173 portno);
1174
1175 /* wait for stable power */
1176 usb_pause_mtx(NULL, USB_MS_TO_TICKS(pwrdly));
1177 }
1178
1179 device_printf(dev, "%d port%s with %d "
1180 "removable, %s powered\n", nports, (nports != 1) ? "s" : "",
1181 removable, udev->flags.self_powered ? "self" : "bus");
1182
1183 /* Start the interrupt endpoint, if any */
1184
1185 if (sc->sc_xfer[0] != NULL) {
1186 mtx_lock(&sc->sc_mtx);
1187 usbd_transfer_start(sc->sc_xfer[0]);
1188 mtx_unlock(&sc->sc_mtx);
1189 }
1190
1191 /* Enable automatic power save on all USB HUBs */
1192
1193 usbd_set_power_mode(udev, USB_POWER_MODE_SAVE);
1194
1195 return (0);
1196
1197error:
1198 usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER);
1199
| 1086 udev->hub = hub;
1087
1088 /* initialize HUB structure */
1089 hub->hubsoftc = sc;
1090 hub->explore = &uhub_explore;
1091 hub->nports = nports;
1092 hub->hubudev = udev;
1093
1094 /* if self powered hub, give ports maximum current */
1095 if (udev->flags.self_powered) {
1096 hub->portpower = USB_MAX_POWER;
1097 } else {
1098 hub->portpower = USB_MIN_POWER;
1099 }
1100
1101 /* set up interrupt pipe */
1102 iface_index = 0;
1103 if (udev->parent_hub == NULL) {
1104 /* root HUB is special */
1105 err = 0;
1106 } else {
1107 /* normal HUB */
1108 err = usbd_transfer_setup(udev, &iface_index, sc->sc_xfer,
1109 uhub_config, UHUB_N_TRANSFER, sc, &sc->sc_mtx);
1110 }
1111 if (err) {
1112 DPRINTFN(0, "cannot setup interrupt transfer, "
1113 "errstr=%s\n", usbd_errstr(err));
1114 goto error;
1115 }
1116 /* wait with power off for a while */
1117 usb_pause_mtx(NULL, USB_MS_TO_TICKS(USB_POWER_DOWN_TIME));
1118
1119 /*
1120 * To have the best chance of success we do things in the exact same
1121 * order as Windoze98. This should not be necessary, but some
1122 * devices do not follow the USB specs to the letter.
1123 *
1124 * These are the events on the bus when a hub is attached:
1125 * Get device and config descriptors (see attach code)
1126 * Get hub descriptor (see above)
1127 * For all ports
1128 * turn on power
1129 * wait for power to become stable
1130 * (all below happens in explore code)
1131 * For all ports
1132 * clear C_PORT_CONNECTION
1133 * For all ports
1134 * get port status
1135 * if device connected
1136 * wait 100 ms
1137 * turn on reset
1138 * wait
1139 * clear C_PORT_RESET
1140 * get port status
1141 * proceed with device attachment
1142 */
1143
1144 /* XXX should check for none, individual, or ganged power? */
1145
1146 removable = 0;
1147
1148 for (x = 0; x != nports; x++) {
1149 /* set up data structures */
1150 struct usb_port *up = hub->ports + x;
1151
1152 up->device_index = 0;
1153 up->restartcnt = 0;
1154 portno = x + 1;
1155
1156 /* check if port is removable */
1157 switch (udev->speed) {
1158 case USB_SPEED_LOW:
1159 case USB_SPEED_FULL:
1160 case USB_SPEED_HIGH:
1161 if (!UHD_NOT_REMOV(&hubdesc20, portno))
1162 removable++;
1163 break;
1164 case USB_SPEED_SUPER:
1165 if (!UHD_NOT_REMOV(&hubdesc30, portno))
1166 removable++;
1167 break;
1168 default:
1169 DPRINTF("Assuming removable port\n");
1170 removable++;
1171 break;
1172 }
1173 if (!err) {
1174 /* turn the power on */
1175 err = usbd_req_set_port_feature(udev, NULL,
1176 portno, UHF_PORT_POWER);
1177 }
1178 if (err) {
1179 DPRINTFN(0, "port %d power on failed, %s\n",
1180 portno, usbd_errstr(err));
1181 }
1182 DPRINTF("turn on port %d power\n",
1183 portno);
1184
1185 /* wait for stable power */
1186 usb_pause_mtx(NULL, USB_MS_TO_TICKS(pwrdly));
1187 }
1188
1189 device_printf(dev, "%d port%s with %d "
1190 "removable, %s powered\n", nports, (nports != 1) ? "s" : "",
1191 removable, udev->flags.self_powered ? "self" : "bus");
1192
1193 /* Start the interrupt endpoint, if any */
1194
1195 if (sc->sc_xfer[0] != NULL) {
1196 mtx_lock(&sc->sc_mtx);
1197 usbd_transfer_start(sc->sc_xfer[0]);
1198 mtx_unlock(&sc->sc_mtx);
1199 }
1200
1201 /* Enable automatic power save on all USB HUBs */
1202
1203 usbd_set_power_mode(udev, USB_POWER_MODE_SAVE);
1204
1205 return (0);
1206
1207error:
1208 usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER);
1209
|
1200 if (udev->hub) {
1201 free(udev->hub, M_USBDEV);
1202 udev->hub = NULL;
1203 }
| 1210#if (USB_HAVE_FIXED_PORT == 0)
1211 free(udev->hub, M_USBDEV);
1212#endif
1213 udev->hub = NULL;
|
1204
1205 mtx_destroy(&sc->sc_mtx);
1206
1207 return (ENXIO);
1208}
1209
1210/*
1211 * Called from process context when the hub is gone.
1212 * Detach all devices on active ports.
1213 */
1214static int
1215uhub_detach(device_t dev)
1216{
1217 struct uhub_softc *sc = device_get_softc(dev);
1218 struct usb_hub *hub = sc->sc_udev->hub;
1219 struct usb_device *child;
1220 uint8_t x;
1221
1222 if (hub == NULL) /* must be partially working */
1223 return (0);
1224
1225 /* Make sure interrupt transfer is gone. */
1226 usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER);
1227
1228 /* Detach all ports */
1229 for (x = 0; x != hub->nports; x++) {
1230
1231 child = usb_bus_port_get_device(sc->sc_udev->bus, hub->ports + x);
1232
1233 if (child == NULL) {
1234 continue;
1235 }
1236
1237 /*
1238 * Free USB device and all subdevices, if any.
1239 */
1240 usb_free_device(child, 0);
1241 }
1242
| 1214
1215 mtx_destroy(&sc->sc_mtx);
1216
1217 return (ENXIO);
1218}
1219
1220/*
1221 * Called from process context when the hub is gone.
1222 * Detach all devices on active ports.
1223 */
1224static int
1225uhub_detach(device_t dev)
1226{
1227 struct uhub_softc *sc = device_get_softc(dev);
1228 struct usb_hub *hub = sc->sc_udev->hub;
1229 struct usb_device *child;
1230 uint8_t x;
1231
1232 if (hub == NULL) /* must be partially working */
1233 return (0);
1234
1235 /* Make sure interrupt transfer is gone. */
1236 usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER);
1237
1238 /* Detach all ports */
1239 for (x = 0; x != hub->nports; x++) {
1240
1241 child = usb_bus_port_get_device(sc->sc_udev->bus, hub->ports + x);
1242
1243 if (child == NULL) {
1244 continue;
1245 }
1246
1247 /*
1248 * Free USB device and all subdevices, if any.
1249 */
1250 usb_free_device(child, 0);
1251 }
1252
|
| 1253#if (USB_HAVE_FIXED_PORT == 0)
|
1243 free(hub, M_USBDEV);
| 1254 free(hub, M_USBDEV);
|
| 1255#endif
|
1244 sc->sc_udev->hub = NULL;
1245
1246 mtx_destroy(&sc->sc_mtx);
1247
1248 return (0);
1249}
1250
1251static int
1252uhub_suspend(device_t dev)
1253{
1254 DPRINTF("\n");
1255 /* Sub-devices are not suspended here! */
1256 return (0);
1257}
1258
1259static int
1260uhub_resume(device_t dev)
1261{
1262 DPRINTF("\n");
1263 /* Sub-devices are not resumed here! */
1264 return (0);
1265}
1266
1267static void
1268uhub_driver_added(device_t dev, driver_t *driver)
1269{
1270 usb_needs_explore_all();
1271}
1272
1273struct hub_result {
1274 struct usb_device *udev;
1275 uint8_t portno;
1276 uint8_t iface_index;
1277};
1278
1279static void
1280uhub_find_iface_index(struct usb_hub *hub, device_t child,
1281 struct hub_result *res)
1282{
1283 struct usb_interface *iface;
1284 struct usb_device *udev;
1285 uint8_t nports;
1286 uint8_t x;
1287 uint8_t i;
1288
1289 nports = hub->nports;
1290 for (x = 0; x != nports; x++) {
1291 udev = usb_bus_port_get_device(hub->hubudev->bus,
1292 hub->ports + x);
1293 if (!udev) {
1294 continue;
1295 }
1296 for (i = 0; i != USB_IFACE_MAX; i++) {
1297 iface = usbd_get_iface(udev, i);
1298 if (iface &&
1299 (iface->subdev == child)) {
1300 res->iface_index = i;
1301 res->udev = udev;
1302 res->portno = x + 1;
1303 return;
1304 }
1305 }
1306 }
1307 res->iface_index = 0;
1308 res->udev = NULL;
1309 res->portno = 0;
1310}
1311
1312static int
1313uhub_child_location_string(device_t parent, device_t child,
1314 char *buf, size_t buflen)
1315{
1316 struct uhub_softc *sc;
1317 struct usb_hub *hub;
1318 struct hub_result res;
1319
1320 if (!device_is_attached(parent)) {
1321 if (buflen)
1322 buf[0] = 0;
1323 return (0);
1324 }
1325
1326 sc = device_get_softc(parent);
1327 hub = sc->sc_udev->hub;
1328
1329 mtx_lock(&Giant);
1330 uhub_find_iface_index(hub, child, &res);
1331 if (!res.udev) {
1332 DPRINTF("device not on hub\n");
1333 if (buflen) {
1334 buf[0] = '\0';
1335 }
1336 goto done;
1337 }
1338 snprintf(buf, buflen, "bus=%u hubaddr=%u port=%u devaddr=%u interface=%u",
1339 (res.udev->parent_hub != NULL) ? res.udev->parent_hub->device_index : 0,
1340 res.portno, device_get_unit(res.udev->bus->bdev),
1341 res.udev->device_index, res.iface_index);
1342done:
1343 mtx_unlock(&Giant);
1344
1345 return (0);
1346}
1347
1348static int
1349uhub_child_pnpinfo_string(device_t parent, device_t child,
1350 char *buf, size_t buflen)
1351{
1352 struct uhub_softc *sc;
1353 struct usb_hub *hub;
1354 struct usb_interface *iface;
1355 struct hub_result res;
1356
1357 if (!device_is_attached(parent)) {
1358 if (buflen)
1359 buf[0] = 0;
1360 return (0);
1361 }
1362
1363 sc = device_get_softc(parent);
1364 hub = sc->sc_udev->hub;
1365
1366 mtx_lock(&Giant);
1367 uhub_find_iface_index(hub, child, &res);
1368 if (!res.udev) {
1369 DPRINTF("device not on hub\n");
1370 if (buflen) {
1371 buf[0] = '\0';
1372 }
1373 goto done;
1374 }
1375 iface = usbd_get_iface(res.udev, res.iface_index);
1376 if (iface && iface->idesc) {
1377 snprintf(buf, buflen, "vendor=0x%04x product=0x%04x "
1378 "devclass=0x%02x devsubclass=0x%02x "
1379 "sernum=\"%s\" "
1380 "release=0x%04x "
1381 "mode=%s "
1382 "intclass=0x%02x intsubclass=0x%02x "
1383 "intprotocol=0x%02x " "%s%s",
1384 UGETW(res.udev->ddesc.idVendor),
1385 UGETW(res.udev->ddesc.idProduct),
1386 res.udev->ddesc.bDeviceClass,
1387 res.udev->ddesc.bDeviceSubClass,
1388 usb_get_serial(res.udev),
1389 UGETW(res.udev->ddesc.bcdDevice),
1390 (res.udev->flags.usb_mode == USB_MODE_HOST) ? "host" : "device",
1391 iface->idesc->bInterfaceClass,
1392 iface->idesc->bInterfaceSubClass,
1393 iface->idesc->bInterfaceProtocol,
1394 iface->pnpinfo ? " " : "",
1395 iface->pnpinfo ? iface->pnpinfo : "");
1396 } else {
1397 if (buflen) {
1398 buf[0] = '\0';
1399 }
1400 goto done;
1401 }
1402done:
1403 mtx_unlock(&Giant);
1404
1405 return (0);
1406}
1407
1408/*
1409 * The USB Transaction Translator:
1410 * ===============================
1411 *
1412 * When doing LOW- and FULL-speed USB transfers accross a HIGH-speed
1413 * USB HUB, bandwidth must be allocated for ISOCHRONOUS and INTERRUPT
1414 * USB transfers. To utilize bandwidth dynamically the "scatter and
1415 * gather" principle must be applied. This means that bandwidth must
1416 * be divided into equal parts of bandwidth. With regard to USB all
1417 * data is transferred in smaller packets with length
1418 * "wMaxPacketSize". The problem however is that "wMaxPacketSize" is
1419 * not a constant!
1420 *
1421 * The bandwidth scheduler which I have implemented will simply pack
1422 * the USB transfers back to back until there is no more space in the
1423 * schedule. Out of the 8 microframes which the USB 2.0 standard
1424 * provides, only 6 are available for non-HIGH-speed devices. I have
1425 * reserved the first 4 microframes for ISOCHRONOUS transfers. The
1426 * last 2 microframes I have reserved for INTERRUPT transfers. Without
1427 * this division, it is very difficult to allocate and free bandwidth
1428 * dynamically.
1429 *
1430 * NOTE about the Transaction Translator in USB HUBs:
1431 *
1432 * USB HUBs have a very simple Transaction Translator, that will
1433 * simply pipeline all the SPLIT transactions. That means that the
1434 * transactions will be executed in the order they are queued!
1435 *
1436 */
1437
1438/*------------------------------------------------------------------------*
1439 * usb_intr_find_best_slot
1440 *
1441 * Return value:
1442 * The best Transaction Translation slot for an interrupt endpoint.
1443 *------------------------------------------------------------------------*/
1444static uint8_t
1445usb_intr_find_best_slot(usb_size_t *ptr, uint8_t start,
1446 uint8_t end, uint8_t mask)
1447{
1448 usb_size_t min = (usb_size_t)-1;
1449 usb_size_t sum;
1450 uint8_t x;
1451 uint8_t y;
1452 uint8_t z;
1453
1454 y = 0;
1455
1456 /* find the last slot with lesser used bandwidth */
1457
1458 for (x = start; x < end; x++) {
1459
1460 sum = 0;
1461
1462 /* compute sum of bandwidth */
1463 for (z = x; z < end; z++) {
1464 if (mask & (1U << (z - x)))
1465 sum += ptr[z];
1466 }
1467
1468 /* check if the current multi-slot is more optimal */
1469 if (min >= sum) {
1470 min = sum;
1471 y = x;
1472 }
1473
1474 /* check if the mask is about to be shifted out */
1475 if (mask & (1U << (end - 1 - x)))
1476 break;
1477 }
1478 return (y);
1479}
1480
1481/*------------------------------------------------------------------------*
1482 * usb_hs_bandwidth_adjust
1483 *
1484 * This function will update the bandwith usage for the microframe
1485 * having index "slot" by "len" bytes. "len" can be negative. If the
1486 * "slot" argument is greater or equal to "USB_HS_MICRO_FRAMES_MAX"
1487 * the "slot" argument will be replaced by the slot having least used
1488 * bandwidth. The "mask" argument is used for multi-slot allocations.
1489 *
1490 * Returns:
1491 * The slot in which the bandwidth update was done: 0..7
1492 *------------------------------------------------------------------------*/
1493static uint8_t
1494usb_hs_bandwidth_adjust(struct usb_device *udev, int16_t len,
1495 uint8_t slot, uint8_t mask)
1496{
1497 struct usb_bus *bus = udev->bus;
1498 struct usb_hub *hub;
1499 enum usb_dev_speed speed;
1500 uint8_t x;
1501
1502 USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
1503
1504 speed = usbd_get_speed(udev);
1505
1506 switch (speed) {
1507 case USB_SPEED_LOW:
1508 case USB_SPEED_FULL:
1509 if (speed == USB_SPEED_LOW) {
1510 len *= 8;
1511 }
1512 /*
1513 * The Host Controller Driver should have
1514 * performed checks so that the lookup
1515 * below does not result in a NULL pointer
1516 * access.
1517 */
1518
1519 hub = udev->parent_hs_hub->hub;
1520 if (slot >= USB_HS_MICRO_FRAMES_MAX) {
1521 slot = usb_intr_find_best_slot(hub->uframe_usage,
1522 USB_FS_ISOC_UFRAME_MAX, 6, mask);
1523 }
1524 for (x = slot; x < 8; x++) {
1525 if (mask & (1U << (x - slot))) {
1526 hub->uframe_usage[x] += len;
1527 bus->uframe_usage[x] += len;
1528 }
1529 }
1530 break;
1531 default:
1532 if (slot >= USB_HS_MICRO_FRAMES_MAX) {
1533 slot = usb_intr_find_best_slot(bus->uframe_usage, 0,
1534 USB_HS_MICRO_FRAMES_MAX, mask);
1535 }
1536 for (x = slot; x < 8; x++) {
1537 if (mask & (1U << (x - slot))) {
1538 bus->uframe_usage[x] += len;
1539 }
1540 }
1541 break;
1542 }
1543 return (slot);
1544}
1545
1546/*------------------------------------------------------------------------*
1547 * usb_hs_bandwidth_alloc
1548 *
1549 * This function is a wrapper function for "usb_hs_bandwidth_adjust()".
1550 *------------------------------------------------------------------------*/
1551void
1552usb_hs_bandwidth_alloc(struct usb_xfer *xfer)
1553{
1554 struct usb_device *udev;
1555 uint8_t slot;
1556 uint8_t mask;
1557 uint8_t speed;
1558
1559 udev = xfer->xroot->udev;
1560
1561 if (udev->flags.usb_mode != USB_MODE_HOST)
1562 return; /* not supported */
1563
1564 xfer->endpoint->refcount_bw++;
1565 if (xfer->endpoint->refcount_bw != 1)
1566 return; /* already allocated */
1567
1568 speed = usbd_get_speed(udev);
1569
1570 switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
1571 case UE_INTERRUPT:
1572 /* allocate a microframe slot */
1573
1574 mask = 0x01;
1575 slot = usb_hs_bandwidth_adjust(udev,
1576 xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask);
1577
1578 xfer->endpoint->usb_uframe = slot;
1579 xfer->endpoint->usb_smask = mask << slot;
1580
1581 if ((speed != USB_SPEED_FULL) &&
1582 (speed != USB_SPEED_LOW)) {
1583 xfer->endpoint->usb_cmask = 0x00 ;
1584 } else {
1585 xfer->endpoint->usb_cmask = (-(0x04 << slot)) & 0xFE;
1586 }
1587 break;
1588
1589 case UE_ISOCHRONOUS:
1590 switch (usbd_xfer_get_fps_shift(xfer)) {
1591 case 0:
1592 mask = 0xFF;
1593 break;
1594 case 1:
1595 mask = 0x55;
1596 break;
1597 case 2:
1598 mask = 0x11;
1599 break;
1600 default:
1601 mask = 0x01;
1602 break;
1603 }
1604
1605 /* allocate a microframe multi-slot */
1606
1607 slot = usb_hs_bandwidth_adjust(udev,
1608 xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask);
1609
1610 xfer->endpoint->usb_uframe = slot;
1611 xfer->endpoint->usb_cmask = 0;
1612 xfer->endpoint->usb_smask = mask << slot;
1613 break;
1614
1615 default:
1616 xfer->endpoint->usb_uframe = 0;
1617 xfer->endpoint->usb_cmask = 0;
1618 xfer->endpoint->usb_smask = 0;
1619 break;
1620 }
1621
1622 DPRINTFN(11, "slot=%d, mask=0x%02x\n",
1623 xfer->endpoint->usb_uframe,
1624 xfer->endpoint->usb_smask >> xfer->endpoint->usb_uframe);
1625}
1626
1627/*------------------------------------------------------------------------*
1628 * usb_hs_bandwidth_free
1629 *
1630 * This function is a wrapper function for "usb_hs_bandwidth_adjust()".
1631 *------------------------------------------------------------------------*/
1632void
1633usb_hs_bandwidth_free(struct usb_xfer *xfer)
1634{
1635 struct usb_device *udev;
1636 uint8_t slot;
1637 uint8_t mask;
1638
1639 udev = xfer->xroot->udev;
1640
1641 if (udev->flags.usb_mode != USB_MODE_HOST)
1642 return; /* not supported */
1643
1644 xfer->endpoint->refcount_bw--;
1645 if (xfer->endpoint->refcount_bw != 0)
1646 return; /* still allocated */
1647
1648 switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
1649 case UE_INTERRUPT:
1650 case UE_ISOCHRONOUS:
1651
1652 slot = xfer->endpoint->usb_uframe;
1653 mask = xfer->endpoint->usb_smask;
1654
1655 /* free microframe slot(s): */
1656 usb_hs_bandwidth_adjust(udev,
1657 -xfer->max_frame_size, slot, mask >> slot);
1658
1659 DPRINTFN(11, "slot=%d, mask=0x%02x\n",
1660 slot, mask >> slot);
1661
1662 xfer->endpoint->usb_uframe = 0;
1663 xfer->endpoint->usb_cmask = 0;
1664 xfer->endpoint->usb_smask = 0;
1665 break;
1666
1667 default:
1668 break;
1669 }
1670}
1671
1672/*------------------------------------------------------------------------*
1673 * usb_isoc_time_expand
1674 *
1675 * This function will expand the time counter from 7-bit to 16-bit.
1676 *
1677 * Returns:
1678 * 16-bit isochronous time counter.
1679 *------------------------------------------------------------------------*/
1680uint16_t
1681usb_isoc_time_expand(struct usb_bus *bus, uint16_t isoc_time_curr)
1682{
1683 uint16_t rem;
1684
1685 USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
1686
1687 rem = bus->isoc_time_last & (USB_ISOC_TIME_MAX - 1);
1688
1689 isoc_time_curr &= (USB_ISOC_TIME_MAX - 1);
1690
1691 if (isoc_time_curr < rem) {
1692 /* the time counter wrapped around */
1693 bus->isoc_time_last += USB_ISOC_TIME_MAX;
1694 }
1695 /* update the remainder */
1696
1697 bus->isoc_time_last &= ~(USB_ISOC_TIME_MAX - 1);
1698 bus->isoc_time_last |= isoc_time_curr;
1699
1700 return (bus->isoc_time_last);
1701}
1702
1703/*------------------------------------------------------------------------*
1704 * usbd_fs_isoc_schedule_alloc_slot
1705 *
1706 * This function will allocate bandwidth for an isochronous FULL speed
1707 * transaction in the FULL speed schedule.
1708 *
1709 * Returns:
1710 * <8: Success
1711 * Else: Error
1712 *------------------------------------------------------------------------*/
1713#if USB_HAVE_TT_SUPPORT
1714uint8_t
1715usbd_fs_isoc_schedule_alloc_slot(struct usb_xfer *isoc_xfer, uint16_t isoc_time)
1716{
1717 struct usb_xfer *xfer;
1718 struct usb_xfer *pipe_xfer;
1719 struct usb_bus *bus;
1720 usb_frlength_t len;
1721 usb_frlength_t data_len;
1722 uint16_t delta;
1723 uint16_t slot;
1724 uint8_t retval;
1725
1726 data_len = 0;
1727 slot = 0;
1728
1729 bus = isoc_xfer->xroot->bus;
1730
1731 TAILQ_FOREACH(xfer, &bus->intr_q.head, wait_entry) {
1732
1733 /* skip self, if any */
1734
1735 if (xfer == isoc_xfer)
1736 continue;
1737
1738 /* check if this USB transfer is going through the same TT */
1739
1740 if (xfer->xroot->udev->parent_hs_hub !=
1741 isoc_xfer->xroot->udev->parent_hs_hub) {
1742 continue;
1743 }
1744 if ((isoc_xfer->xroot->udev->parent_hs_hub->
1745 ddesc.bDeviceProtocol == UDPROTO_HSHUBMTT) &&
1746 (xfer->xroot->udev->hs_port_no !=
1747 isoc_xfer->xroot->udev->hs_port_no)) {
1748 continue;
1749 }
1750 if (xfer->endpoint->methods != isoc_xfer->endpoint->methods)
1751 continue;
1752
1753 /* check if isoc_time is part of this transfer */
1754
1755 delta = xfer->isoc_time_complete - isoc_time;
1756 if (delta > 0 && delta <= xfer->nframes) {
1757 delta = xfer->nframes - delta;
1758
1759 len = xfer->frlengths[delta];
1760 len += 8;
1761 len *= 7;
1762 len /= 6;
1763
1764 data_len += len;
1765 }
1766
1767 /*
1768 * Check double buffered transfers. Only stream ID
1769 * equal to zero is valid here!
1770 */
1771 TAILQ_FOREACH(pipe_xfer, &xfer->endpoint->endpoint_q[0].head,
1772 wait_entry) {
1773
1774 /* skip self, if any */
1775
1776 if (pipe_xfer == isoc_xfer)
1777 continue;
1778
1779 /* check if isoc_time is part of this transfer */
1780
1781 delta = pipe_xfer->isoc_time_complete - isoc_time;
1782 if (delta > 0 && delta <= pipe_xfer->nframes) {
1783 delta = pipe_xfer->nframes - delta;
1784
1785 len = pipe_xfer->frlengths[delta];
1786 len += 8;
1787 len *= 7;
1788 len /= 6;
1789
1790 data_len += len;
1791 }
1792 }
1793 }
1794
1795 while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) {
1796 data_len -= USB_FS_BYTES_PER_HS_UFRAME;
1797 slot++;
1798 }
1799
1800 /* check for overflow */
1801
1802 if (slot >= USB_FS_ISOC_UFRAME_MAX)
1803 return (255);
1804
1805 retval = slot;
1806
1807 delta = isoc_xfer->isoc_time_complete - isoc_time;
1808 if (delta > 0 && delta <= isoc_xfer->nframes) {
1809 delta = isoc_xfer->nframes - delta;
1810
1811 len = isoc_xfer->frlengths[delta];
1812 len += 8;
1813 len *= 7;
1814 len /= 6;
1815
1816 data_len += len;
1817 }
1818
1819 while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) {
1820 data_len -= USB_FS_BYTES_PER_HS_UFRAME;
1821 slot++;
1822 }
1823
1824 /* check for overflow */
1825
1826 if (slot >= USB_FS_ISOC_UFRAME_MAX)
1827 return (255);
1828
1829 return (retval);
1830}
1831#endif
1832
1833/*------------------------------------------------------------------------*
1834 * usb_bus_port_get_device
1835 *
1836 * This function is NULL safe.
1837 *------------------------------------------------------------------------*/
1838struct usb_device *
1839usb_bus_port_get_device(struct usb_bus *bus, struct usb_port *up)
1840{
1841 if ((bus == NULL) || (up == NULL)) {
1842 /* be NULL safe */
1843 return (NULL);
1844 }
1845 if (up->device_index == 0) {
1846 /* nothing to do */
1847 return (NULL);
1848 }
1849 return (bus->devices[up->device_index]);
1850}
1851
1852/*------------------------------------------------------------------------*
1853 * usb_bus_port_set_device
1854 *
1855 * This function is NULL safe.
1856 *------------------------------------------------------------------------*/
1857void
1858usb_bus_port_set_device(struct usb_bus *bus, struct usb_port *up,
1859 struct usb_device *udev, uint8_t device_index)
1860{
1861 if (bus == NULL) {
1862 /* be NULL safe */
1863 return;
1864 }
1865 /*
1866 * There is only one case where we don't
1867 * have an USB port, and that is the Root Hub!
1868 */
1869 if (up) {
1870 if (udev) {
1871 up->device_index = device_index;
1872 } else {
1873 device_index = up->device_index;
1874 up->device_index = 0;
1875 }
1876 }
1877 /*
1878 * Make relationships to our new device
1879 */
1880 if (device_index != 0) {
1881#if USB_HAVE_UGEN
1882 mtx_lock(&usb_ref_lock);
1883#endif
1884 bus->devices[device_index] = udev;
1885#if USB_HAVE_UGEN
1886 mtx_unlock(&usb_ref_lock);
1887#endif
1888 }
1889 /*
1890 * Debug print
1891 */
1892 DPRINTFN(2, "bus %p devices[%u] = %p\n", bus, device_index, udev);
1893}
1894
1895/*------------------------------------------------------------------------*
1896 * usb_needs_explore
1897 *
1898 * This functions is called when the USB event thread needs to run.
1899 *------------------------------------------------------------------------*/
1900void
1901usb_needs_explore(struct usb_bus *bus, uint8_t do_probe)
1902{
1903 uint8_t do_unlock;
1904
1905 DPRINTF("\n");
1906
1907 if (bus == NULL) {
1908 DPRINTF("No bus pointer!\n");
1909 return;
1910 }
1911 if ((bus->devices == NULL) ||
1912 (bus->devices[USB_ROOT_HUB_ADDR] == NULL)) {
1913 DPRINTF("No root HUB\n");
1914 return;
1915 }
1916 if (mtx_owned(&bus->bus_mtx)) {
1917 do_unlock = 0;
1918 } else {
1919 USB_BUS_LOCK(bus);
1920 do_unlock = 1;
1921 }
1922 if (do_probe) {
1923 bus->do_probe = 1;
1924 }
1925 if (usb_proc_msignal(USB_BUS_EXPLORE_PROC(bus),
1926 &bus->explore_msg[0], &bus->explore_msg[1])) {
1927 /* ignore */
1928 }
1929 if (do_unlock) {
1930 USB_BUS_UNLOCK(bus);
1931 }
1932}
1933
1934/*------------------------------------------------------------------------*
1935 * usb_needs_explore_all
1936 *
1937 * This function is called whenever a new driver is loaded and will
1938 * cause that all USB busses are re-explored.
1939 *------------------------------------------------------------------------*/
1940void
1941usb_needs_explore_all(void)
1942{
1943 struct usb_bus *bus;
1944 devclass_t dc;
1945 device_t dev;
1946 int max;
1947
1948 DPRINTFN(3, "\n");
1949
1950 dc = usb_devclass_ptr;
1951 if (dc == NULL) {
1952 DPRINTFN(0, "no devclass\n");
1953 return;
1954 }
1955 /*
1956 * Explore all USB busses in parallell.
1957 */
1958 max = devclass_get_maxunit(dc);
1959 while (max >= 0) {
1960 dev = devclass_get_device(dc, max);
1961 if (dev) {
1962 bus = device_get_softc(dev);
1963 if (bus) {
1964 usb_needs_explore(bus, 1);
1965 }
1966 }
1967 max--;
1968 }
1969}
1970
1971/*------------------------------------------------------------------------*
1972 * usb_bus_power_update
1973 *
1974 * This function will ensure that all USB devices on the given bus are
1975 * properly suspended or resumed according to the device transfer
1976 * state.
1977 *------------------------------------------------------------------------*/
1978#if USB_HAVE_POWERD
1979void
1980usb_bus_power_update(struct usb_bus *bus)
1981{
1982 usb_needs_explore(bus, 0 /* no probe */ );
1983}
1984#endif
1985
1986/*------------------------------------------------------------------------*
1987 * usbd_transfer_power_ref
1988 *
1989 * This function will modify the power save reference counts and
1990 * wakeup the USB device associated with the given USB transfer, if
1991 * needed.
1992 *------------------------------------------------------------------------*/
1993#if USB_HAVE_POWERD
1994void
1995usbd_transfer_power_ref(struct usb_xfer *xfer, int val)
1996{
1997 static const usb_power_mask_t power_mask[4] = {
1998 [UE_CONTROL] = USB_HW_POWER_CONTROL,
1999 [UE_BULK] = USB_HW_POWER_BULK,
2000 [UE_INTERRUPT] = USB_HW_POWER_INTERRUPT,
2001 [UE_ISOCHRONOUS] = USB_HW_POWER_ISOC,
2002 };
2003 struct usb_device *udev;
2004 uint8_t needs_explore;
2005 uint8_t needs_hw_power;
2006 uint8_t xfer_type;
2007
2008 udev = xfer->xroot->udev;
2009
2010 if (udev->device_index == USB_ROOT_HUB_ADDR) {
2011 /* no power save for root HUB */
2012 return;
2013 }
2014 USB_BUS_LOCK(udev->bus);
2015
2016 xfer_type = xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE;
2017
2018 udev->pwr_save.last_xfer_time = ticks;
2019 udev->pwr_save.type_refs[xfer_type] += val;
2020
2021 if (xfer->flags_int.control_xfr) {
2022 udev->pwr_save.read_refs += val;
2023 if (xfer->flags_int.usb_mode == USB_MODE_HOST) {
2024 /*
2025 * It is not allowed to suspend during a
2026 * control transfer:
2027 */
2028 udev->pwr_save.write_refs += val;
2029 }
2030 } else if (USB_GET_DATA_ISREAD(xfer)) {
2031 udev->pwr_save.read_refs += val;
2032 } else {
2033 udev->pwr_save.write_refs += val;
2034 }
2035
2036 if (val > 0) {
2037 if (udev->flags.self_suspended)
2038 needs_explore = usb_peer_should_wakeup(udev);
2039 else
2040 needs_explore = 0;
2041
2042 if (!(udev->bus->hw_power_state & power_mask[xfer_type])) {
2043 DPRINTF("Adding type %u to power state\n", xfer_type);
2044 udev->bus->hw_power_state |= power_mask[xfer_type];
2045 needs_hw_power = 1;
2046 } else {
2047 needs_hw_power = 0;
2048 }
2049 } else {
2050 needs_explore = 0;
2051 needs_hw_power = 0;
2052 }
2053
2054 USB_BUS_UNLOCK(udev->bus);
2055
2056 if (needs_explore) {
2057 DPRINTF("update\n");
2058 usb_bus_power_update(udev->bus);
2059 } else if (needs_hw_power) {
2060 DPRINTF("needs power\n");
2061 if (udev->bus->methods->set_hw_power != NULL) {
2062 (udev->bus->methods->set_hw_power) (udev->bus);
2063 }
2064 }
2065}
2066#endif
2067
2068/*------------------------------------------------------------------------*
2069 * usb_peer_should_wakeup
2070 *
2071 * This function returns non-zero if the current device should wake up.
2072 *------------------------------------------------------------------------*/
2073static uint8_t
2074usb_peer_should_wakeup(struct usb_device *udev)
2075{
2076 return ((udev->power_mode == USB_POWER_MODE_ON) ||
2077 (udev->driver_added_refcount != udev->bus->driver_added_refcount) ||
2078 (udev->re_enumerate_wait != 0) ||
2079 (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0) ||
2080 (udev->pwr_save.write_refs != 0) ||
2081 ((udev->pwr_save.read_refs != 0) &&
2082 (udev->flags.usb_mode == USB_MODE_HOST) &&
2083 (usb_peer_can_wakeup(udev) == 0)));
2084}
2085
2086/*------------------------------------------------------------------------*
2087 * usb_bus_powerd
2088 *
2089 * This function implements the USB power daemon and is called
2090 * regularly from the USB explore thread.
2091 *------------------------------------------------------------------------*/
2092#if USB_HAVE_POWERD
2093void
2094usb_bus_powerd(struct usb_bus *bus)
2095{
2096 struct usb_device *udev;
2097 usb_ticks_t temp;
2098 usb_ticks_t limit;
2099 usb_ticks_t mintime;
2100 usb_size_t type_refs[5];
2101 uint8_t x;
2102
2103 limit = usb_power_timeout;
2104 if (limit == 0)
2105 limit = hz;
2106 else if (limit > 255)
2107 limit = 255 * hz;
2108 else
2109 limit = limit * hz;
2110
2111 DPRINTF("bus=%p\n", bus);
2112
2113 USB_BUS_LOCK(bus);
2114
2115 /*
2116 * The root HUB device is never suspended
2117 * and we simply skip it.
2118 */
2119 for (x = USB_ROOT_HUB_ADDR + 1;
2120 x != bus->devices_max; x++) {
2121
2122 udev = bus->devices[x];
2123 if (udev == NULL)
2124 continue;
2125
2126 temp = ticks - udev->pwr_save.last_xfer_time;
2127
2128 if (usb_peer_should_wakeup(udev)) {
2129 /* check if we are suspended */
2130 if (udev->flags.self_suspended != 0) {
2131 USB_BUS_UNLOCK(bus);
2132 usb_dev_resume_peer(udev);
2133 USB_BUS_LOCK(bus);
2134 }
2135 } else if ((temp >= limit) &&
2136 (udev->flags.usb_mode == USB_MODE_HOST) &&
2137 (udev->flags.self_suspended == 0)) {
2138 /* try to do suspend */
2139
2140 USB_BUS_UNLOCK(bus);
2141 usb_dev_suspend_peer(udev);
2142 USB_BUS_LOCK(bus);
2143 }
2144 }
2145
2146 /* reset counters */
2147
2148 mintime = (usb_ticks_t)-1;
2149 type_refs[0] = 0;
2150 type_refs[1] = 0;
2151 type_refs[2] = 0;
2152 type_refs[3] = 0;
2153 type_refs[4] = 0;
2154
2155 /* Re-loop all the devices to get the actual state */
2156
2157 for (x = USB_ROOT_HUB_ADDR + 1;
2158 x != bus->devices_max; x++) {
2159
2160 udev = bus->devices[x];
2161 if (udev == NULL)
2162 continue;
2163
2164 /* we found a non-Root-Hub USB device */
2165 type_refs[4] += 1;
2166
2167 /* "last_xfer_time" can be updated by a resume */
2168 temp = ticks - udev->pwr_save.last_xfer_time;
2169
2170 /*
2171 * Compute minimum time since last transfer for the complete
2172 * bus:
2173 */
2174 if (temp < mintime)
2175 mintime = temp;
2176
2177 if (udev->flags.self_suspended == 0) {
2178 type_refs[0] += udev->pwr_save.type_refs[0];
2179 type_refs[1] += udev->pwr_save.type_refs[1];
2180 type_refs[2] += udev->pwr_save.type_refs[2];
2181 type_refs[3] += udev->pwr_save.type_refs[3];
2182 }
2183 }
2184
2185 if (mintime >= (usb_ticks_t)(1 * hz)) {
2186 /* recompute power masks */
2187 DPRINTF("Recomputing power masks\n");
2188 bus->hw_power_state = 0;
2189 if (type_refs[UE_CONTROL] != 0)
2190 bus->hw_power_state |= USB_HW_POWER_CONTROL;
2191 if (type_refs[UE_BULK] != 0)
2192 bus->hw_power_state |= USB_HW_POWER_BULK;
2193 if (type_refs[UE_INTERRUPT] != 0)
2194 bus->hw_power_state |= USB_HW_POWER_INTERRUPT;
2195 if (type_refs[UE_ISOCHRONOUS] != 0)
2196 bus->hw_power_state |= USB_HW_POWER_ISOC;
2197 if (type_refs[4] != 0)
2198 bus->hw_power_state |= USB_HW_POWER_NON_ROOT_HUB;
2199 }
2200 USB_BUS_UNLOCK(bus);
2201
2202 if (bus->methods->set_hw_power != NULL) {
2203 /* always update hardware power! */
2204 (bus->methods->set_hw_power) (bus);
2205 }
2206 return;
2207}
2208#endif
2209
2210/*------------------------------------------------------------------------*
2211 * usb_dev_resume_peer
2212 *
2213 * This function will resume an USB peer and do the required USB
2214 * signalling to get an USB device out of the suspended state.
2215 *------------------------------------------------------------------------*/
2216static void
2217usb_dev_resume_peer(struct usb_device *udev)
2218{
2219 struct usb_bus *bus;
2220 int err;
2221
2222 /* be NULL safe */
2223 if (udev == NULL)
2224 return;
2225
2226 /* check if already resumed */
2227 if (udev->flags.self_suspended == 0)
2228 return;
2229
2230 /* we need a parent HUB to do resume */
2231 if (udev->parent_hub == NULL)
2232 return;
2233
2234 DPRINTF("udev=%p\n", udev);
2235
2236 if ((udev->flags.usb_mode == USB_MODE_DEVICE) &&
2237 (udev->flags.remote_wakeup == 0)) {
2238 /*
2239 * If the host did not set the remote wakeup feature, we can
2240 * not wake it up either!
2241 */
2242 DPRINTF("remote wakeup is not set!\n");
2243 return;
2244 }
2245 /* get bus pointer */
2246 bus = udev->bus;
2247
2248 /* resume parent hub first */
2249 usb_dev_resume_peer(udev->parent_hub);
2250
2251 /* reduce chance of instant resume failure by waiting a little bit */
2252 usb_pause_mtx(NULL, USB_MS_TO_TICKS(20));
2253
2254 if (usb_device_20_compatible(udev)) {
2255 /* resume current port (Valid in Host and Device Mode) */
2256 err = usbd_req_clear_port_feature(udev->parent_hub,
2257 NULL, udev->port_no, UHF_PORT_SUSPEND);
2258 if (err) {
2259 DPRINTFN(0, "Resuming port failed\n");
2260 return;
2261 }
2262 } else {
2263 /* resume current port (Valid in Host and Device Mode) */
2264 err = usbd_req_set_port_link_state(udev->parent_hub,
2265 NULL, udev->port_no, UPS_PORT_LS_U0);
2266 if (err) {
2267 DPRINTFN(0, "Resuming port failed\n");
2268 return;
2269 }
2270 }
2271
2272 /* resume settle time */
2273 usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
2274
2275 if (bus->methods->device_resume != NULL) {
2276 /* resume USB device on the USB controller */
2277 (bus->methods->device_resume) (udev);
2278 }
2279 USB_BUS_LOCK(bus);
2280 /* set that this device is now resumed */
2281 udev->flags.self_suspended = 0;
2282#if USB_HAVE_POWERD
2283 /* make sure that we don't go into suspend right away */
2284 udev->pwr_save.last_xfer_time = ticks;
2285
2286 /* make sure the needed power masks are on */
2287 if (udev->pwr_save.type_refs[UE_CONTROL] != 0)
2288 bus->hw_power_state |= USB_HW_POWER_CONTROL;
2289 if (udev->pwr_save.type_refs[UE_BULK] != 0)
2290 bus->hw_power_state |= USB_HW_POWER_BULK;
2291 if (udev->pwr_save.type_refs[UE_INTERRUPT] != 0)
2292 bus->hw_power_state |= USB_HW_POWER_INTERRUPT;
2293 if (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0)
2294 bus->hw_power_state |= USB_HW_POWER_ISOC;
2295#endif
2296 USB_BUS_UNLOCK(bus);
2297
2298 if (bus->methods->set_hw_power != NULL) {
2299 /* always update hardware power! */
2300 (bus->methods->set_hw_power) (bus);
2301 }
2302
2303 usbd_sr_lock(udev);
2304
2305 /* notify all sub-devices about resume */
2306 err = usb_suspend_resume(udev, 0);
2307
2308 usbd_sr_unlock(udev);
2309
2310 /* check if peer has wakeup capability */
2311 if (usb_peer_can_wakeup(udev)) {
2312 /* clear remote wakeup */
2313 err = usbd_req_clear_device_feature(udev,
2314 NULL, UF_DEVICE_REMOTE_WAKEUP);
2315 if (err) {
2316 DPRINTFN(0, "Clearing device "
2317 "remote wakeup failed: %s\n",
2318 usbd_errstr(err));
2319 }
2320 }
2321}
2322
2323/*------------------------------------------------------------------------*
2324 * usb_dev_suspend_peer
2325 *
2326 * This function will suspend an USB peer and do the required USB
2327 * signalling to get an USB device into the suspended state.
2328 *------------------------------------------------------------------------*/
2329static void
2330usb_dev_suspend_peer(struct usb_device *udev)
2331{
2332 struct usb_device *child;
2333 int err;
2334 uint8_t x;
2335 uint8_t nports;
2336
2337repeat:
2338 /* be NULL safe */
2339 if (udev == NULL)
2340 return;
2341
2342 /* check if already suspended */
2343 if (udev->flags.self_suspended)
2344 return;
2345
2346 /* we need a parent HUB to do suspend */
2347 if (udev->parent_hub == NULL)
2348 return;
2349
2350 DPRINTF("udev=%p\n", udev);
2351
2352 /* check if the current device is a HUB */
2353 if (udev->hub != NULL) {
2354 nports = udev->hub->nports;
2355
2356 /* check if all devices on the HUB are suspended */
2357 for (x = 0; x != nports; x++) {
2358 child = usb_bus_port_get_device(udev->bus,
2359 udev->hub->ports + x);
2360
2361 if (child == NULL)
2362 continue;
2363
2364 if (child->flags.self_suspended)
2365 continue;
2366
2367 DPRINTFN(1, "Port %u is busy on the HUB!\n", x + 1);
2368 return;
2369 }
2370 }
2371
2372 if (usb_peer_can_wakeup(udev)) {
2373 /*
2374 * This request needs to be done before we set
2375 * "udev->flags.self_suspended":
2376 */
2377
2378 /* allow device to do remote wakeup */
2379 err = usbd_req_set_device_feature(udev,
2380 NULL, UF_DEVICE_REMOTE_WAKEUP);
2381 if (err) {
2382 DPRINTFN(0, "Setting device "
2383 "remote wakeup failed\n");
2384 }
2385 }
2386
2387 USB_BUS_LOCK(udev->bus);
2388 /*
2389 * Checking for suspend condition and setting suspended bit
2390 * must be atomic!
2391 */
2392 err = usb_peer_should_wakeup(udev);
2393 if (err == 0) {
2394 /*
2395 * Set that this device is suspended. This variable
2396 * must be set before calling USB controller suspend
2397 * callbacks.
2398 */
2399 udev->flags.self_suspended = 1;
2400 }
2401 USB_BUS_UNLOCK(udev->bus);
2402
2403 if (err != 0) {
2404 if (usb_peer_can_wakeup(udev)) {
2405 /* allow device to do remote wakeup */
2406 err = usbd_req_clear_device_feature(udev,
2407 NULL, UF_DEVICE_REMOTE_WAKEUP);
2408 if (err) {
2409 DPRINTFN(0, "Setting device "
2410 "remote wakeup failed\n");
2411 }
2412 }
2413
2414 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2415 /* resume parent HUB first */
2416 usb_dev_resume_peer(udev->parent_hub);
2417
2418 /* reduce chance of instant resume failure by waiting a little bit */
2419 usb_pause_mtx(NULL, USB_MS_TO_TICKS(20));
2420
2421 /* resume current port (Valid in Host and Device Mode) */
2422 err = usbd_req_clear_port_feature(udev->parent_hub,
2423 NULL, udev->port_no, UHF_PORT_SUSPEND);
2424
2425 /* resume settle time */
2426 usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
2427 }
2428 DPRINTF("Suspend was cancelled!\n");
2429 return;
2430 }
2431
2432 usbd_sr_lock(udev);
2433
2434 /* notify all sub-devices about suspend */
2435 err = usb_suspend_resume(udev, 1);
2436
2437 usbd_sr_unlock(udev);
2438
2439 if (udev->bus->methods->device_suspend != NULL) {
2440 usb_timeout_t temp;
2441
2442 /* suspend device on the USB controller */
2443 (udev->bus->methods->device_suspend) (udev);
2444
2445 /* do DMA delay */
2446 temp = usbd_get_dma_delay(udev);
2447 if (temp != 0)
2448 usb_pause_mtx(NULL, USB_MS_TO_TICKS(temp));
2449
2450 }
2451
2452 if (usb_device_20_compatible(udev)) {
2453 /* suspend current port */
2454 err = usbd_req_set_port_feature(udev->parent_hub,
2455 NULL, udev->port_no, UHF_PORT_SUSPEND);
2456 if (err) {
2457 DPRINTFN(0, "Suspending port failed\n");
2458 return;
2459 }
2460 } else {
2461 /* suspend current port */
2462 err = usbd_req_set_port_link_state(udev->parent_hub,
2463 NULL, udev->port_no, UPS_PORT_LS_U3);
2464 if (err) {
2465 DPRINTFN(0, "Suspending port failed\n");
2466 return;
2467 }
2468 }
2469
2470 udev = udev->parent_hub;
2471 goto repeat;
2472}
2473
2474/*------------------------------------------------------------------------*
2475 * usbd_set_power_mode
2476 *
2477 * This function will set the power mode, see USB_POWER_MODE_XXX for a
2478 * USB device.
2479 *------------------------------------------------------------------------*/
2480void
2481usbd_set_power_mode(struct usb_device *udev, uint8_t power_mode)
2482{
2483 /* filter input argument */
2484 if ((power_mode != USB_POWER_MODE_ON) &&
2485 (power_mode != USB_POWER_MODE_OFF))
2486 power_mode = USB_POWER_MODE_SAVE;
2487
2488 power_mode = usbd_filter_power_mode(udev, power_mode);
2489
2490 udev->power_mode = power_mode; /* update copy of power mode */
2491
2492#if USB_HAVE_POWERD
2493 usb_bus_power_update(udev->bus);
2494#endif
2495}
2496
2497/*------------------------------------------------------------------------*
2498 * usbd_filter_power_mode
2499 *
2500 * This function filters the power mode based on hardware requirements.
2501 *------------------------------------------------------------------------*/
2502uint8_t
2503usbd_filter_power_mode(struct usb_device *udev, uint8_t power_mode)
2504{
2505 struct usb_bus_methods *mtod;
2506 int8_t temp;
2507
2508 mtod = udev->bus->methods;
2509 temp = -1;
2510
2511 if (mtod->get_power_mode != NULL)
2512 (mtod->get_power_mode) (udev, &temp);
2513
2514 /* check if we should not filter */
2515 if (temp < 0)
2516 return (power_mode);
2517
2518 /* use fixed power mode given by hardware driver */
2519 return (temp);
2520}
2521
2522/*------------------------------------------------------------------------*
2523 * usbd_start_re_enumerate
2524 *
2525 * This function starts re-enumeration of the given USB device. This
2526 * function does not need to be called BUS-locked. This function does
2527 * not wait until the re-enumeration is completed.
2528 *------------------------------------------------------------------------*/
2529void
2530usbd_start_re_enumerate(struct usb_device *udev)
2531{
2532 if (udev->re_enumerate_wait == 0) {
2533 udev->re_enumerate_wait = 1;
2534 usb_needs_explore(udev->bus, 0);
2535 }
2536}
| 1256 sc->sc_udev->hub = NULL;
1257
1258 mtx_destroy(&sc->sc_mtx);
1259
1260 return (0);
1261}
1262
1263static int
1264uhub_suspend(device_t dev)
1265{
1266 DPRINTF("\n");
1267 /* Sub-devices are not suspended here! */
1268 return (0);
1269}
1270
1271static int
1272uhub_resume(device_t dev)
1273{
1274 DPRINTF("\n");
1275 /* Sub-devices are not resumed here! */
1276 return (0);
1277}
1278
1279static void
1280uhub_driver_added(device_t dev, driver_t *driver)
1281{
1282 usb_needs_explore_all();
1283}
1284
1285struct hub_result {
1286 struct usb_device *udev;
1287 uint8_t portno;
1288 uint8_t iface_index;
1289};
1290
1291static void
1292uhub_find_iface_index(struct usb_hub *hub, device_t child,
1293 struct hub_result *res)
1294{
1295 struct usb_interface *iface;
1296 struct usb_device *udev;
1297 uint8_t nports;
1298 uint8_t x;
1299 uint8_t i;
1300
1301 nports = hub->nports;
1302 for (x = 0; x != nports; x++) {
1303 udev = usb_bus_port_get_device(hub->hubudev->bus,
1304 hub->ports + x);
1305 if (!udev) {
1306 continue;
1307 }
1308 for (i = 0; i != USB_IFACE_MAX; i++) {
1309 iface = usbd_get_iface(udev, i);
1310 if (iface &&
1311 (iface->subdev == child)) {
1312 res->iface_index = i;
1313 res->udev = udev;
1314 res->portno = x + 1;
1315 return;
1316 }
1317 }
1318 }
1319 res->iface_index = 0;
1320 res->udev = NULL;
1321 res->portno = 0;
1322}
1323
1324static int
1325uhub_child_location_string(device_t parent, device_t child,
1326 char *buf, size_t buflen)
1327{
1328 struct uhub_softc *sc;
1329 struct usb_hub *hub;
1330 struct hub_result res;
1331
1332 if (!device_is_attached(parent)) {
1333 if (buflen)
1334 buf[0] = 0;
1335 return (0);
1336 }
1337
1338 sc = device_get_softc(parent);
1339 hub = sc->sc_udev->hub;
1340
1341 mtx_lock(&Giant);
1342 uhub_find_iface_index(hub, child, &res);
1343 if (!res.udev) {
1344 DPRINTF("device not on hub\n");
1345 if (buflen) {
1346 buf[0] = '\0';
1347 }
1348 goto done;
1349 }
1350 snprintf(buf, buflen, "bus=%u hubaddr=%u port=%u devaddr=%u interface=%u",
1351 (res.udev->parent_hub != NULL) ? res.udev->parent_hub->device_index : 0,
1352 res.portno, device_get_unit(res.udev->bus->bdev),
1353 res.udev->device_index, res.iface_index);
1354done:
1355 mtx_unlock(&Giant);
1356
1357 return (0);
1358}
1359
1360static int
1361uhub_child_pnpinfo_string(device_t parent, device_t child,
1362 char *buf, size_t buflen)
1363{
1364 struct uhub_softc *sc;
1365 struct usb_hub *hub;
1366 struct usb_interface *iface;
1367 struct hub_result res;
1368
1369 if (!device_is_attached(parent)) {
1370 if (buflen)
1371 buf[0] = 0;
1372 return (0);
1373 }
1374
1375 sc = device_get_softc(parent);
1376 hub = sc->sc_udev->hub;
1377
1378 mtx_lock(&Giant);
1379 uhub_find_iface_index(hub, child, &res);
1380 if (!res.udev) {
1381 DPRINTF("device not on hub\n");
1382 if (buflen) {
1383 buf[0] = '\0';
1384 }
1385 goto done;
1386 }
1387 iface = usbd_get_iface(res.udev, res.iface_index);
1388 if (iface && iface->idesc) {
1389 snprintf(buf, buflen, "vendor=0x%04x product=0x%04x "
1390 "devclass=0x%02x devsubclass=0x%02x "
1391 "sernum=\"%s\" "
1392 "release=0x%04x "
1393 "mode=%s "
1394 "intclass=0x%02x intsubclass=0x%02x "
1395 "intprotocol=0x%02x " "%s%s",
1396 UGETW(res.udev->ddesc.idVendor),
1397 UGETW(res.udev->ddesc.idProduct),
1398 res.udev->ddesc.bDeviceClass,
1399 res.udev->ddesc.bDeviceSubClass,
1400 usb_get_serial(res.udev),
1401 UGETW(res.udev->ddesc.bcdDevice),
1402 (res.udev->flags.usb_mode == USB_MODE_HOST) ? "host" : "device",
1403 iface->idesc->bInterfaceClass,
1404 iface->idesc->bInterfaceSubClass,
1405 iface->idesc->bInterfaceProtocol,
1406 iface->pnpinfo ? " " : "",
1407 iface->pnpinfo ? iface->pnpinfo : "");
1408 } else {
1409 if (buflen) {
1410 buf[0] = '\0';
1411 }
1412 goto done;
1413 }
1414done:
1415 mtx_unlock(&Giant);
1416
1417 return (0);
1418}
1419
1420/*
1421 * The USB Transaction Translator:
1422 * ===============================
1423 *
1424 * When doing LOW- and FULL-speed USB transfers accross a HIGH-speed
1425 * USB HUB, bandwidth must be allocated for ISOCHRONOUS and INTERRUPT
1426 * USB transfers. To utilize bandwidth dynamically the "scatter and
1427 * gather" principle must be applied. This means that bandwidth must
1428 * be divided into equal parts of bandwidth. With regard to USB all
1429 * data is transferred in smaller packets with length
1430 * "wMaxPacketSize". The problem however is that "wMaxPacketSize" is
1431 * not a constant!
1432 *
1433 * The bandwidth scheduler which I have implemented will simply pack
1434 * the USB transfers back to back until there is no more space in the
1435 * schedule. Out of the 8 microframes which the USB 2.0 standard
1436 * provides, only 6 are available for non-HIGH-speed devices. I have
1437 * reserved the first 4 microframes for ISOCHRONOUS transfers. The
1438 * last 2 microframes I have reserved for INTERRUPT transfers. Without
1439 * this division, it is very difficult to allocate and free bandwidth
1440 * dynamically.
1441 *
1442 * NOTE about the Transaction Translator in USB HUBs:
1443 *
1444 * USB HUBs have a very simple Transaction Translator, that will
1445 * simply pipeline all the SPLIT transactions. That means that the
1446 * transactions will be executed in the order they are queued!
1447 *
1448 */
1449
1450/*------------------------------------------------------------------------*
1451 * usb_intr_find_best_slot
1452 *
1453 * Return value:
1454 * The best Transaction Translation slot for an interrupt endpoint.
1455 *------------------------------------------------------------------------*/
1456static uint8_t
1457usb_intr_find_best_slot(usb_size_t *ptr, uint8_t start,
1458 uint8_t end, uint8_t mask)
1459{
1460 usb_size_t min = (usb_size_t)-1;
1461 usb_size_t sum;
1462 uint8_t x;
1463 uint8_t y;
1464 uint8_t z;
1465
1466 y = 0;
1467
1468 /* find the last slot with lesser used bandwidth */
1469
1470 for (x = start; x < end; x++) {
1471
1472 sum = 0;
1473
1474 /* compute sum of bandwidth */
1475 for (z = x; z < end; z++) {
1476 if (mask & (1U << (z - x)))
1477 sum += ptr[z];
1478 }
1479
1480 /* check if the current multi-slot is more optimal */
1481 if (min >= sum) {
1482 min = sum;
1483 y = x;
1484 }
1485
1486 /* check if the mask is about to be shifted out */
1487 if (mask & (1U << (end - 1 - x)))
1488 break;
1489 }
1490 return (y);
1491}
1492
1493/*------------------------------------------------------------------------*
1494 * usb_hs_bandwidth_adjust
1495 *
1496 * This function will update the bandwith usage for the microframe
1497 * having index "slot" by "len" bytes. "len" can be negative. If the
1498 * "slot" argument is greater or equal to "USB_HS_MICRO_FRAMES_MAX"
1499 * the "slot" argument will be replaced by the slot having least used
1500 * bandwidth. The "mask" argument is used for multi-slot allocations.
1501 *
1502 * Returns:
1503 * The slot in which the bandwidth update was done: 0..7
1504 *------------------------------------------------------------------------*/
1505static uint8_t
1506usb_hs_bandwidth_adjust(struct usb_device *udev, int16_t len,
1507 uint8_t slot, uint8_t mask)
1508{
1509 struct usb_bus *bus = udev->bus;
1510 struct usb_hub *hub;
1511 enum usb_dev_speed speed;
1512 uint8_t x;
1513
1514 USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
1515
1516 speed = usbd_get_speed(udev);
1517
1518 switch (speed) {
1519 case USB_SPEED_LOW:
1520 case USB_SPEED_FULL:
1521 if (speed == USB_SPEED_LOW) {
1522 len *= 8;
1523 }
1524 /*
1525 * The Host Controller Driver should have
1526 * performed checks so that the lookup
1527 * below does not result in a NULL pointer
1528 * access.
1529 */
1530
1531 hub = udev->parent_hs_hub->hub;
1532 if (slot >= USB_HS_MICRO_FRAMES_MAX) {
1533 slot = usb_intr_find_best_slot(hub->uframe_usage,
1534 USB_FS_ISOC_UFRAME_MAX, 6, mask);
1535 }
1536 for (x = slot; x < 8; x++) {
1537 if (mask & (1U << (x - slot))) {
1538 hub->uframe_usage[x] += len;
1539 bus->uframe_usage[x] += len;
1540 }
1541 }
1542 break;
1543 default:
1544 if (slot >= USB_HS_MICRO_FRAMES_MAX) {
1545 slot = usb_intr_find_best_slot(bus->uframe_usage, 0,
1546 USB_HS_MICRO_FRAMES_MAX, mask);
1547 }
1548 for (x = slot; x < 8; x++) {
1549 if (mask & (1U << (x - slot))) {
1550 bus->uframe_usage[x] += len;
1551 }
1552 }
1553 break;
1554 }
1555 return (slot);
1556}
1557
1558/*------------------------------------------------------------------------*
1559 * usb_hs_bandwidth_alloc
1560 *
1561 * This function is a wrapper function for "usb_hs_bandwidth_adjust()".
1562 *------------------------------------------------------------------------*/
1563void
1564usb_hs_bandwidth_alloc(struct usb_xfer *xfer)
1565{
1566 struct usb_device *udev;
1567 uint8_t slot;
1568 uint8_t mask;
1569 uint8_t speed;
1570
1571 udev = xfer->xroot->udev;
1572
1573 if (udev->flags.usb_mode != USB_MODE_HOST)
1574 return; /* not supported */
1575
1576 xfer->endpoint->refcount_bw++;
1577 if (xfer->endpoint->refcount_bw != 1)
1578 return; /* already allocated */
1579
1580 speed = usbd_get_speed(udev);
1581
1582 switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
1583 case UE_INTERRUPT:
1584 /* allocate a microframe slot */
1585
1586 mask = 0x01;
1587 slot = usb_hs_bandwidth_adjust(udev,
1588 xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask);
1589
1590 xfer->endpoint->usb_uframe = slot;
1591 xfer->endpoint->usb_smask = mask << slot;
1592
1593 if ((speed != USB_SPEED_FULL) &&
1594 (speed != USB_SPEED_LOW)) {
1595 xfer->endpoint->usb_cmask = 0x00 ;
1596 } else {
1597 xfer->endpoint->usb_cmask = (-(0x04 << slot)) & 0xFE;
1598 }
1599 break;
1600
1601 case UE_ISOCHRONOUS:
1602 switch (usbd_xfer_get_fps_shift(xfer)) {
1603 case 0:
1604 mask = 0xFF;
1605 break;
1606 case 1:
1607 mask = 0x55;
1608 break;
1609 case 2:
1610 mask = 0x11;
1611 break;
1612 default:
1613 mask = 0x01;
1614 break;
1615 }
1616
1617 /* allocate a microframe multi-slot */
1618
1619 slot = usb_hs_bandwidth_adjust(udev,
1620 xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask);
1621
1622 xfer->endpoint->usb_uframe = slot;
1623 xfer->endpoint->usb_cmask = 0;
1624 xfer->endpoint->usb_smask = mask << slot;
1625 break;
1626
1627 default:
1628 xfer->endpoint->usb_uframe = 0;
1629 xfer->endpoint->usb_cmask = 0;
1630 xfer->endpoint->usb_smask = 0;
1631 break;
1632 }
1633
1634 DPRINTFN(11, "slot=%d, mask=0x%02x\n",
1635 xfer->endpoint->usb_uframe,
1636 xfer->endpoint->usb_smask >> xfer->endpoint->usb_uframe);
1637}
1638
1639/*------------------------------------------------------------------------*
1640 * usb_hs_bandwidth_free
1641 *
1642 * This function is a wrapper function for "usb_hs_bandwidth_adjust()".
1643 *------------------------------------------------------------------------*/
1644void
1645usb_hs_bandwidth_free(struct usb_xfer *xfer)
1646{
1647 struct usb_device *udev;
1648 uint8_t slot;
1649 uint8_t mask;
1650
1651 udev = xfer->xroot->udev;
1652
1653 if (udev->flags.usb_mode != USB_MODE_HOST)
1654 return; /* not supported */
1655
1656 xfer->endpoint->refcount_bw--;
1657 if (xfer->endpoint->refcount_bw != 0)
1658 return; /* still allocated */
1659
1660 switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
1661 case UE_INTERRUPT:
1662 case UE_ISOCHRONOUS:
1663
1664 slot = xfer->endpoint->usb_uframe;
1665 mask = xfer->endpoint->usb_smask;
1666
1667 /* free microframe slot(s): */
1668 usb_hs_bandwidth_adjust(udev,
1669 -xfer->max_frame_size, slot, mask >> slot);
1670
1671 DPRINTFN(11, "slot=%d, mask=0x%02x\n",
1672 slot, mask >> slot);
1673
1674 xfer->endpoint->usb_uframe = 0;
1675 xfer->endpoint->usb_cmask = 0;
1676 xfer->endpoint->usb_smask = 0;
1677 break;
1678
1679 default:
1680 break;
1681 }
1682}
1683
1684/*------------------------------------------------------------------------*
1685 * usb_isoc_time_expand
1686 *
1687 * This function will expand the time counter from 7-bit to 16-bit.
1688 *
1689 * Returns:
1690 * 16-bit isochronous time counter.
1691 *------------------------------------------------------------------------*/
1692uint16_t
1693usb_isoc_time_expand(struct usb_bus *bus, uint16_t isoc_time_curr)
1694{
1695 uint16_t rem;
1696
1697 USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
1698
1699 rem = bus->isoc_time_last & (USB_ISOC_TIME_MAX - 1);
1700
1701 isoc_time_curr &= (USB_ISOC_TIME_MAX - 1);
1702
1703 if (isoc_time_curr < rem) {
1704 /* the time counter wrapped around */
1705 bus->isoc_time_last += USB_ISOC_TIME_MAX;
1706 }
1707 /* update the remainder */
1708
1709 bus->isoc_time_last &= ~(USB_ISOC_TIME_MAX - 1);
1710 bus->isoc_time_last |= isoc_time_curr;
1711
1712 return (bus->isoc_time_last);
1713}
1714
1715/*------------------------------------------------------------------------*
1716 * usbd_fs_isoc_schedule_alloc_slot
1717 *
1718 * This function will allocate bandwidth for an isochronous FULL speed
1719 * transaction in the FULL speed schedule.
1720 *
1721 * Returns:
1722 * <8: Success
1723 * Else: Error
1724 *------------------------------------------------------------------------*/
1725#if USB_HAVE_TT_SUPPORT
1726uint8_t
1727usbd_fs_isoc_schedule_alloc_slot(struct usb_xfer *isoc_xfer, uint16_t isoc_time)
1728{
1729 struct usb_xfer *xfer;
1730 struct usb_xfer *pipe_xfer;
1731 struct usb_bus *bus;
1732 usb_frlength_t len;
1733 usb_frlength_t data_len;
1734 uint16_t delta;
1735 uint16_t slot;
1736 uint8_t retval;
1737
1738 data_len = 0;
1739 slot = 0;
1740
1741 bus = isoc_xfer->xroot->bus;
1742
1743 TAILQ_FOREACH(xfer, &bus->intr_q.head, wait_entry) {
1744
1745 /* skip self, if any */
1746
1747 if (xfer == isoc_xfer)
1748 continue;
1749
1750 /* check if this USB transfer is going through the same TT */
1751
1752 if (xfer->xroot->udev->parent_hs_hub !=
1753 isoc_xfer->xroot->udev->parent_hs_hub) {
1754 continue;
1755 }
1756 if ((isoc_xfer->xroot->udev->parent_hs_hub->
1757 ddesc.bDeviceProtocol == UDPROTO_HSHUBMTT) &&
1758 (xfer->xroot->udev->hs_port_no !=
1759 isoc_xfer->xroot->udev->hs_port_no)) {
1760 continue;
1761 }
1762 if (xfer->endpoint->methods != isoc_xfer->endpoint->methods)
1763 continue;
1764
1765 /* check if isoc_time is part of this transfer */
1766
1767 delta = xfer->isoc_time_complete - isoc_time;
1768 if (delta > 0 && delta <= xfer->nframes) {
1769 delta = xfer->nframes - delta;
1770
1771 len = xfer->frlengths[delta];
1772 len += 8;
1773 len *= 7;
1774 len /= 6;
1775
1776 data_len += len;
1777 }
1778
1779 /*
1780 * Check double buffered transfers. Only stream ID
1781 * equal to zero is valid here!
1782 */
1783 TAILQ_FOREACH(pipe_xfer, &xfer->endpoint->endpoint_q[0].head,
1784 wait_entry) {
1785
1786 /* skip self, if any */
1787
1788 if (pipe_xfer == isoc_xfer)
1789 continue;
1790
1791 /* check if isoc_time is part of this transfer */
1792
1793 delta = pipe_xfer->isoc_time_complete - isoc_time;
1794 if (delta > 0 && delta <= pipe_xfer->nframes) {
1795 delta = pipe_xfer->nframes - delta;
1796
1797 len = pipe_xfer->frlengths[delta];
1798 len += 8;
1799 len *= 7;
1800 len /= 6;
1801
1802 data_len += len;
1803 }
1804 }
1805 }
1806
1807 while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) {
1808 data_len -= USB_FS_BYTES_PER_HS_UFRAME;
1809 slot++;
1810 }
1811
1812 /* check for overflow */
1813
1814 if (slot >= USB_FS_ISOC_UFRAME_MAX)
1815 return (255);
1816
1817 retval = slot;
1818
1819 delta = isoc_xfer->isoc_time_complete - isoc_time;
1820 if (delta > 0 && delta <= isoc_xfer->nframes) {
1821 delta = isoc_xfer->nframes - delta;
1822
1823 len = isoc_xfer->frlengths[delta];
1824 len += 8;
1825 len *= 7;
1826 len /= 6;
1827
1828 data_len += len;
1829 }
1830
1831 while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) {
1832 data_len -= USB_FS_BYTES_PER_HS_UFRAME;
1833 slot++;
1834 }
1835
1836 /* check for overflow */
1837
1838 if (slot >= USB_FS_ISOC_UFRAME_MAX)
1839 return (255);
1840
1841 return (retval);
1842}
1843#endif
1844
1845/*------------------------------------------------------------------------*
1846 * usb_bus_port_get_device
1847 *
1848 * This function is NULL safe.
1849 *------------------------------------------------------------------------*/
1850struct usb_device *
1851usb_bus_port_get_device(struct usb_bus *bus, struct usb_port *up)
1852{
1853 if ((bus == NULL) || (up == NULL)) {
1854 /* be NULL safe */
1855 return (NULL);
1856 }
1857 if (up->device_index == 0) {
1858 /* nothing to do */
1859 return (NULL);
1860 }
1861 return (bus->devices[up->device_index]);
1862}
1863
1864/*------------------------------------------------------------------------*
1865 * usb_bus_port_set_device
1866 *
1867 * This function is NULL safe.
1868 *------------------------------------------------------------------------*/
1869void
1870usb_bus_port_set_device(struct usb_bus *bus, struct usb_port *up,
1871 struct usb_device *udev, uint8_t device_index)
1872{
1873 if (bus == NULL) {
1874 /* be NULL safe */
1875 return;
1876 }
1877 /*
1878 * There is only one case where we don't
1879 * have an USB port, and that is the Root Hub!
1880 */
1881 if (up) {
1882 if (udev) {
1883 up->device_index = device_index;
1884 } else {
1885 device_index = up->device_index;
1886 up->device_index = 0;
1887 }
1888 }
1889 /*
1890 * Make relationships to our new device
1891 */
1892 if (device_index != 0) {
1893#if USB_HAVE_UGEN
1894 mtx_lock(&usb_ref_lock);
1895#endif
1896 bus->devices[device_index] = udev;
1897#if USB_HAVE_UGEN
1898 mtx_unlock(&usb_ref_lock);
1899#endif
1900 }
1901 /*
1902 * Debug print
1903 */
1904 DPRINTFN(2, "bus %p devices[%u] = %p\n", bus, device_index, udev);
1905}
1906
1907/*------------------------------------------------------------------------*
1908 * usb_needs_explore
1909 *
1910 * This functions is called when the USB event thread needs to run.
1911 *------------------------------------------------------------------------*/
1912void
1913usb_needs_explore(struct usb_bus *bus, uint8_t do_probe)
1914{
1915 uint8_t do_unlock;
1916
1917 DPRINTF("\n");
1918
1919 if (bus == NULL) {
1920 DPRINTF("No bus pointer!\n");
1921 return;
1922 }
1923 if ((bus->devices == NULL) ||
1924 (bus->devices[USB_ROOT_HUB_ADDR] == NULL)) {
1925 DPRINTF("No root HUB\n");
1926 return;
1927 }
1928 if (mtx_owned(&bus->bus_mtx)) {
1929 do_unlock = 0;
1930 } else {
1931 USB_BUS_LOCK(bus);
1932 do_unlock = 1;
1933 }
1934 if (do_probe) {
1935 bus->do_probe = 1;
1936 }
1937 if (usb_proc_msignal(USB_BUS_EXPLORE_PROC(bus),
1938 &bus->explore_msg[0], &bus->explore_msg[1])) {
1939 /* ignore */
1940 }
1941 if (do_unlock) {
1942 USB_BUS_UNLOCK(bus);
1943 }
1944}
1945
1946/*------------------------------------------------------------------------*
1947 * usb_needs_explore_all
1948 *
1949 * This function is called whenever a new driver is loaded and will
1950 * cause that all USB busses are re-explored.
1951 *------------------------------------------------------------------------*/
1952void
1953usb_needs_explore_all(void)
1954{
1955 struct usb_bus *bus;
1956 devclass_t dc;
1957 device_t dev;
1958 int max;
1959
1960 DPRINTFN(3, "\n");
1961
1962 dc = usb_devclass_ptr;
1963 if (dc == NULL) {
1964 DPRINTFN(0, "no devclass\n");
1965 return;
1966 }
1967 /*
1968 * Explore all USB busses in parallell.
1969 */
1970 max = devclass_get_maxunit(dc);
1971 while (max >= 0) {
1972 dev = devclass_get_device(dc, max);
1973 if (dev) {
1974 bus = device_get_softc(dev);
1975 if (bus) {
1976 usb_needs_explore(bus, 1);
1977 }
1978 }
1979 max--;
1980 }
1981}
1982
1983/*------------------------------------------------------------------------*
1984 * usb_bus_power_update
1985 *
1986 * This function will ensure that all USB devices on the given bus are
1987 * properly suspended or resumed according to the device transfer
1988 * state.
1989 *------------------------------------------------------------------------*/
1990#if USB_HAVE_POWERD
1991void
1992usb_bus_power_update(struct usb_bus *bus)
1993{
1994 usb_needs_explore(bus, 0 /* no probe */ );
1995}
1996#endif
1997
1998/*------------------------------------------------------------------------*
1999 * usbd_transfer_power_ref
2000 *
2001 * This function will modify the power save reference counts and
2002 * wakeup the USB device associated with the given USB transfer, if
2003 * needed.
2004 *------------------------------------------------------------------------*/
2005#if USB_HAVE_POWERD
2006void
2007usbd_transfer_power_ref(struct usb_xfer *xfer, int val)
2008{
2009 static const usb_power_mask_t power_mask[4] = {
2010 [UE_CONTROL] = USB_HW_POWER_CONTROL,
2011 [UE_BULK] = USB_HW_POWER_BULK,
2012 [UE_INTERRUPT] = USB_HW_POWER_INTERRUPT,
2013 [UE_ISOCHRONOUS] = USB_HW_POWER_ISOC,
2014 };
2015 struct usb_device *udev;
2016 uint8_t needs_explore;
2017 uint8_t needs_hw_power;
2018 uint8_t xfer_type;
2019
2020 udev = xfer->xroot->udev;
2021
2022 if (udev->device_index == USB_ROOT_HUB_ADDR) {
2023 /* no power save for root HUB */
2024 return;
2025 }
2026 USB_BUS_LOCK(udev->bus);
2027
2028 xfer_type = xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE;
2029
2030 udev->pwr_save.last_xfer_time = ticks;
2031 udev->pwr_save.type_refs[xfer_type] += val;
2032
2033 if (xfer->flags_int.control_xfr) {
2034 udev->pwr_save.read_refs += val;
2035 if (xfer->flags_int.usb_mode == USB_MODE_HOST) {
2036 /*
2037 * It is not allowed to suspend during a
2038 * control transfer:
2039 */
2040 udev->pwr_save.write_refs += val;
2041 }
2042 } else if (USB_GET_DATA_ISREAD(xfer)) {
2043 udev->pwr_save.read_refs += val;
2044 } else {
2045 udev->pwr_save.write_refs += val;
2046 }
2047
2048 if (val > 0) {
2049 if (udev->flags.self_suspended)
2050 needs_explore = usb_peer_should_wakeup(udev);
2051 else
2052 needs_explore = 0;
2053
2054 if (!(udev->bus->hw_power_state & power_mask[xfer_type])) {
2055 DPRINTF("Adding type %u to power state\n", xfer_type);
2056 udev->bus->hw_power_state |= power_mask[xfer_type];
2057 needs_hw_power = 1;
2058 } else {
2059 needs_hw_power = 0;
2060 }
2061 } else {
2062 needs_explore = 0;
2063 needs_hw_power = 0;
2064 }
2065
2066 USB_BUS_UNLOCK(udev->bus);
2067
2068 if (needs_explore) {
2069 DPRINTF("update\n");
2070 usb_bus_power_update(udev->bus);
2071 } else if (needs_hw_power) {
2072 DPRINTF("needs power\n");
2073 if (udev->bus->methods->set_hw_power != NULL) {
2074 (udev->bus->methods->set_hw_power) (udev->bus);
2075 }
2076 }
2077}
2078#endif
2079
2080/*------------------------------------------------------------------------*
2081 * usb_peer_should_wakeup
2082 *
2083 * This function returns non-zero if the current device should wake up.
2084 *------------------------------------------------------------------------*/
2085static uint8_t
2086usb_peer_should_wakeup(struct usb_device *udev)
2087{
2088 return ((udev->power_mode == USB_POWER_MODE_ON) ||
2089 (udev->driver_added_refcount != udev->bus->driver_added_refcount) ||
2090 (udev->re_enumerate_wait != 0) ||
2091 (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0) ||
2092 (udev->pwr_save.write_refs != 0) ||
2093 ((udev->pwr_save.read_refs != 0) &&
2094 (udev->flags.usb_mode == USB_MODE_HOST) &&
2095 (usb_peer_can_wakeup(udev) == 0)));
2096}
2097
2098/*------------------------------------------------------------------------*
2099 * usb_bus_powerd
2100 *
2101 * This function implements the USB power daemon and is called
2102 * regularly from the USB explore thread.
2103 *------------------------------------------------------------------------*/
2104#if USB_HAVE_POWERD
2105void
2106usb_bus_powerd(struct usb_bus *bus)
2107{
2108 struct usb_device *udev;
2109 usb_ticks_t temp;
2110 usb_ticks_t limit;
2111 usb_ticks_t mintime;
2112 usb_size_t type_refs[5];
2113 uint8_t x;
2114
2115 limit = usb_power_timeout;
2116 if (limit == 0)
2117 limit = hz;
2118 else if (limit > 255)
2119 limit = 255 * hz;
2120 else
2121 limit = limit * hz;
2122
2123 DPRINTF("bus=%p\n", bus);
2124
2125 USB_BUS_LOCK(bus);
2126
2127 /*
2128 * The root HUB device is never suspended
2129 * and we simply skip it.
2130 */
2131 for (x = USB_ROOT_HUB_ADDR + 1;
2132 x != bus->devices_max; x++) {
2133
2134 udev = bus->devices[x];
2135 if (udev == NULL)
2136 continue;
2137
2138 temp = ticks - udev->pwr_save.last_xfer_time;
2139
2140 if (usb_peer_should_wakeup(udev)) {
2141 /* check if we are suspended */
2142 if (udev->flags.self_suspended != 0) {
2143 USB_BUS_UNLOCK(bus);
2144 usb_dev_resume_peer(udev);
2145 USB_BUS_LOCK(bus);
2146 }
2147 } else if ((temp >= limit) &&
2148 (udev->flags.usb_mode == USB_MODE_HOST) &&
2149 (udev->flags.self_suspended == 0)) {
2150 /* try to do suspend */
2151
2152 USB_BUS_UNLOCK(bus);
2153 usb_dev_suspend_peer(udev);
2154 USB_BUS_LOCK(bus);
2155 }
2156 }
2157
2158 /* reset counters */
2159
2160 mintime = (usb_ticks_t)-1;
2161 type_refs[0] = 0;
2162 type_refs[1] = 0;
2163 type_refs[2] = 0;
2164 type_refs[3] = 0;
2165 type_refs[4] = 0;
2166
2167 /* Re-loop all the devices to get the actual state */
2168
2169 for (x = USB_ROOT_HUB_ADDR + 1;
2170 x != bus->devices_max; x++) {
2171
2172 udev = bus->devices[x];
2173 if (udev == NULL)
2174 continue;
2175
2176 /* we found a non-Root-Hub USB device */
2177 type_refs[4] += 1;
2178
2179 /* "last_xfer_time" can be updated by a resume */
2180 temp = ticks - udev->pwr_save.last_xfer_time;
2181
2182 /*
2183 * Compute minimum time since last transfer for the complete
2184 * bus:
2185 */
2186 if (temp < mintime)
2187 mintime = temp;
2188
2189 if (udev->flags.self_suspended == 0) {
2190 type_refs[0] += udev->pwr_save.type_refs[0];
2191 type_refs[1] += udev->pwr_save.type_refs[1];
2192 type_refs[2] += udev->pwr_save.type_refs[2];
2193 type_refs[3] += udev->pwr_save.type_refs[3];
2194 }
2195 }
2196
2197 if (mintime >= (usb_ticks_t)(1 * hz)) {
2198 /* recompute power masks */
2199 DPRINTF("Recomputing power masks\n");
2200 bus->hw_power_state = 0;
2201 if (type_refs[UE_CONTROL] != 0)
2202 bus->hw_power_state |= USB_HW_POWER_CONTROL;
2203 if (type_refs[UE_BULK] != 0)
2204 bus->hw_power_state |= USB_HW_POWER_BULK;
2205 if (type_refs[UE_INTERRUPT] != 0)
2206 bus->hw_power_state |= USB_HW_POWER_INTERRUPT;
2207 if (type_refs[UE_ISOCHRONOUS] != 0)
2208 bus->hw_power_state |= USB_HW_POWER_ISOC;
2209 if (type_refs[4] != 0)
2210 bus->hw_power_state |= USB_HW_POWER_NON_ROOT_HUB;
2211 }
2212 USB_BUS_UNLOCK(bus);
2213
2214 if (bus->methods->set_hw_power != NULL) {
2215 /* always update hardware power! */
2216 (bus->methods->set_hw_power) (bus);
2217 }
2218 return;
2219}
2220#endif
2221
2222/*------------------------------------------------------------------------*
2223 * usb_dev_resume_peer
2224 *
2225 * This function will resume an USB peer and do the required USB
2226 * signalling to get an USB device out of the suspended state.
2227 *------------------------------------------------------------------------*/
2228static void
2229usb_dev_resume_peer(struct usb_device *udev)
2230{
2231 struct usb_bus *bus;
2232 int err;
2233
2234 /* be NULL safe */
2235 if (udev == NULL)
2236 return;
2237
2238 /* check if already resumed */
2239 if (udev->flags.self_suspended == 0)
2240 return;
2241
2242 /* we need a parent HUB to do resume */
2243 if (udev->parent_hub == NULL)
2244 return;
2245
2246 DPRINTF("udev=%p\n", udev);
2247
2248 if ((udev->flags.usb_mode == USB_MODE_DEVICE) &&
2249 (udev->flags.remote_wakeup == 0)) {
2250 /*
2251 * If the host did not set the remote wakeup feature, we can
2252 * not wake it up either!
2253 */
2254 DPRINTF("remote wakeup is not set!\n");
2255 return;
2256 }
2257 /* get bus pointer */
2258 bus = udev->bus;
2259
2260 /* resume parent hub first */
2261 usb_dev_resume_peer(udev->parent_hub);
2262
2263 /* reduce chance of instant resume failure by waiting a little bit */
2264 usb_pause_mtx(NULL, USB_MS_TO_TICKS(20));
2265
2266 if (usb_device_20_compatible(udev)) {
2267 /* resume current port (Valid in Host and Device Mode) */
2268 err = usbd_req_clear_port_feature(udev->parent_hub,
2269 NULL, udev->port_no, UHF_PORT_SUSPEND);
2270 if (err) {
2271 DPRINTFN(0, "Resuming port failed\n");
2272 return;
2273 }
2274 } else {
2275 /* resume current port (Valid in Host and Device Mode) */
2276 err = usbd_req_set_port_link_state(udev->parent_hub,
2277 NULL, udev->port_no, UPS_PORT_LS_U0);
2278 if (err) {
2279 DPRINTFN(0, "Resuming port failed\n");
2280 return;
2281 }
2282 }
2283
2284 /* resume settle time */
2285 usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
2286
2287 if (bus->methods->device_resume != NULL) {
2288 /* resume USB device on the USB controller */
2289 (bus->methods->device_resume) (udev);
2290 }
2291 USB_BUS_LOCK(bus);
2292 /* set that this device is now resumed */
2293 udev->flags.self_suspended = 0;
2294#if USB_HAVE_POWERD
2295 /* make sure that we don't go into suspend right away */
2296 udev->pwr_save.last_xfer_time = ticks;
2297
2298 /* make sure the needed power masks are on */
2299 if (udev->pwr_save.type_refs[UE_CONTROL] != 0)
2300 bus->hw_power_state |= USB_HW_POWER_CONTROL;
2301 if (udev->pwr_save.type_refs[UE_BULK] != 0)
2302 bus->hw_power_state |= USB_HW_POWER_BULK;
2303 if (udev->pwr_save.type_refs[UE_INTERRUPT] != 0)
2304 bus->hw_power_state |= USB_HW_POWER_INTERRUPT;
2305 if (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0)
2306 bus->hw_power_state |= USB_HW_POWER_ISOC;
2307#endif
2308 USB_BUS_UNLOCK(bus);
2309
2310 if (bus->methods->set_hw_power != NULL) {
2311 /* always update hardware power! */
2312 (bus->methods->set_hw_power) (bus);
2313 }
2314
2315 usbd_sr_lock(udev);
2316
2317 /* notify all sub-devices about resume */
2318 err = usb_suspend_resume(udev, 0);
2319
2320 usbd_sr_unlock(udev);
2321
2322 /* check if peer has wakeup capability */
2323 if (usb_peer_can_wakeup(udev)) {
2324 /* clear remote wakeup */
2325 err = usbd_req_clear_device_feature(udev,
2326 NULL, UF_DEVICE_REMOTE_WAKEUP);
2327 if (err) {
2328 DPRINTFN(0, "Clearing device "
2329 "remote wakeup failed: %s\n",
2330 usbd_errstr(err));
2331 }
2332 }
2333}
2334
2335/*------------------------------------------------------------------------*
2336 * usb_dev_suspend_peer
2337 *
2338 * This function will suspend an USB peer and do the required USB
2339 * signalling to get an USB device into the suspended state.
2340 *------------------------------------------------------------------------*/
2341static void
2342usb_dev_suspend_peer(struct usb_device *udev)
2343{
2344 struct usb_device *child;
2345 int err;
2346 uint8_t x;
2347 uint8_t nports;
2348
2349repeat:
2350 /* be NULL safe */
2351 if (udev == NULL)
2352 return;
2353
2354 /* check if already suspended */
2355 if (udev->flags.self_suspended)
2356 return;
2357
2358 /* we need a parent HUB to do suspend */
2359 if (udev->parent_hub == NULL)
2360 return;
2361
2362 DPRINTF("udev=%p\n", udev);
2363
2364 /* check if the current device is a HUB */
2365 if (udev->hub != NULL) {
2366 nports = udev->hub->nports;
2367
2368 /* check if all devices on the HUB are suspended */
2369 for (x = 0; x != nports; x++) {
2370 child = usb_bus_port_get_device(udev->bus,
2371 udev->hub->ports + x);
2372
2373 if (child == NULL)
2374 continue;
2375
2376 if (child->flags.self_suspended)
2377 continue;
2378
2379 DPRINTFN(1, "Port %u is busy on the HUB!\n", x + 1);
2380 return;
2381 }
2382 }
2383
2384 if (usb_peer_can_wakeup(udev)) {
2385 /*
2386 * This request needs to be done before we set
2387 * "udev->flags.self_suspended":
2388 */
2389
2390 /* allow device to do remote wakeup */
2391 err = usbd_req_set_device_feature(udev,
2392 NULL, UF_DEVICE_REMOTE_WAKEUP);
2393 if (err) {
2394 DPRINTFN(0, "Setting device "
2395 "remote wakeup failed\n");
2396 }
2397 }
2398
2399 USB_BUS_LOCK(udev->bus);
2400 /*
2401 * Checking for suspend condition and setting suspended bit
2402 * must be atomic!
2403 */
2404 err = usb_peer_should_wakeup(udev);
2405 if (err == 0) {
2406 /*
2407 * Set that this device is suspended. This variable
2408 * must be set before calling USB controller suspend
2409 * callbacks.
2410 */
2411 udev->flags.self_suspended = 1;
2412 }
2413 USB_BUS_UNLOCK(udev->bus);
2414
2415 if (err != 0) {
2416 if (usb_peer_can_wakeup(udev)) {
2417 /* allow device to do remote wakeup */
2418 err = usbd_req_clear_device_feature(udev,
2419 NULL, UF_DEVICE_REMOTE_WAKEUP);
2420 if (err) {
2421 DPRINTFN(0, "Setting device "
2422 "remote wakeup failed\n");
2423 }
2424 }
2425
2426 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2427 /* resume parent HUB first */
2428 usb_dev_resume_peer(udev->parent_hub);
2429
2430 /* reduce chance of instant resume failure by waiting a little bit */
2431 usb_pause_mtx(NULL, USB_MS_TO_TICKS(20));
2432
2433 /* resume current port (Valid in Host and Device Mode) */
2434 err = usbd_req_clear_port_feature(udev->parent_hub,
2435 NULL, udev->port_no, UHF_PORT_SUSPEND);
2436
2437 /* resume settle time */
2438 usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
2439 }
2440 DPRINTF("Suspend was cancelled!\n");
2441 return;
2442 }
2443
2444 usbd_sr_lock(udev);
2445
2446 /* notify all sub-devices about suspend */
2447 err = usb_suspend_resume(udev, 1);
2448
2449 usbd_sr_unlock(udev);
2450
2451 if (udev->bus->methods->device_suspend != NULL) {
2452 usb_timeout_t temp;
2453
2454 /* suspend device on the USB controller */
2455 (udev->bus->methods->device_suspend) (udev);
2456
2457 /* do DMA delay */
2458 temp = usbd_get_dma_delay(udev);
2459 if (temp != 0)
2460 usb_pause_mtx(NULL, USB_MS_TO_TICKS(temp));
2461
2462 }
2463
2464 if (usb_device_20_compatible(udev)) {
2465 /* suspend current port */
2466 err = usbd_req_set_port_feature(udev->parent_hub,
2467 NULL, udev->port_no, UHF_PORT_SUSPEND);
2468 if (err) {
2469 DPRINTFN(0, "Suspending port failed\n");
2470 return;
2471 }
2472 } else {
2473 /* suspend current port */
2474 err = usbd_req_set_port_link_state(udev->parent_hub,
2475 NULL, udev->port_no, UPS_PORT_LS_U3);
2476 if (err) {
2477 DPRINTFN(0, "Suspending port failed\n");
2478 return;
2479 }
2480 }
2481
2482 udev = udev->parent_hub;
2483 goto repeat;
2484}
2485
2486/*------------------------------------------------------------------------*
2487 * usbd_set_power_mode
2488 *
2489 * This function will set the power mode, see USB_POWER_MODE_XXX for a
2490 * USB device.
2491 *------------------------------------------------------------------------*/
2492void
2493usbd_set_power_mode(struct usb_device *udev, uint8_t power_mode)
2494{
2495 /* filter input argument */
2496 if ((power_mode != USB_POWER_MODE_ON) &&
2497 (power_mode != USB_POWER_MODE_OFF))
2498 power_mode = USB_POWER_MODE_SAVE;
2499
2500 power_mode = usbd_filter_power_mode(udev, power_mode);
2501
2502 udev->power_mode = power_mode; /* update copy of power mode */
2503
2504#if USB_HAVE_POWERD
2505 usb_bus_power_update(udev->bus);
2506#endif
2507}
2508
2509/*------------------------------------------------------------------------*
2510 * usbd_filter_power_mode
2511 *
2512 * This function filters the power mode based on hardware requirements.
2513 *------------------------------------------------------------------------*/
2514uint8_t
2515usbd_filter_power_mode(struct usb_device *udev, uint8_t power_mode)
2516{
2517 struct usb_bus_methods *mtod;
2518 int8_t temp;
2519
2520 mtod = udev->bus->methods;
2521 temp = -1;
2522
2523 if (mtod->get_power_mode != NULL)
2524 (mtod->get_power_mode) (udev, &temp);
2525
2526 /* check if we should not filter */
2527 if (temp < 0)
2528 return (power_mode);
2529
2530 /* use fixed power mode given by hardware driver */
2531 return (temp);
2532}
2533
2534/*------------------------------------------------------------------------*
2535 * usbd_start_re_enumerate
2536 *
2537 * This function starts re-enumeration of the given USB device. This
2538 * function does not need to be called BUS-locked. This function does
2539 * not wait until the re-enumeration is completed.
2540 *------------------------------------------------------------------------*/
2541void
2542usbd_start_re_enumerate(struct usb_device *udev)
2543{
2544 if (udev->re_enumerate_wait == 0) {
2545 udev->re_enumerate_wait = 1;
2546 usb_needs_explore(udev->bus, 0);
2547 }
2548}
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