xref: /freebsd/sys/dev/usb/usb_hub_acpi.c (revision 734e82fe33aa764367791a7d603b383996c6b40b)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
5  * Copyright (c) 1998 Lennart Augustsson. All rights reserved.
6  * Copyright (c) 2008-2010 Hans Petter Selasky. All rights reserved.
7  * Copyright (c) 2019 Takanori Watanabe.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30 
31 /*
32  * USB spec: http://www.usb.org/developers/docs/usbspec.zip
33  */
34 
35 #ifdef USB_GLOBAL_INCLUDE_FILE
36 #include USB_GLOBAL_INCLUDE_FILE
37 #else
38 #include <sys/stdint.h>
39 #include <sys/stddef.h>
40 #include <sys/param.h>
41 #include <sys/queue.h>
42 #include <sys/types.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/bus.h>
46 #include <sys/module.h>
47 #include <sys/lock.h>
48 #include <sys/mutex.h>
49 #include <sys/condvar.h>
50 #include <sys/sysctl.h>
51 #include <sys/sx.h>
52 #include <sys/unistd.h>
53 #include <sys/callout.h>
54 #include <sys/malloc.h>
55 #include <sys/priv.h>
56 
57 #include <dev/usb/usb.h>
58 #include <dev/usb/usbdi.h>
59 #include <dev/usb/usbdi_util.h>
60 
61 #define	USB_DEBUG_VAR uhub_debug
62 
63 #include <dev/usb/usb_core.h>
64 #include <dev/usb/usb_process.h>
65 #include <dev/usb/usb_device.h>
66 #include <dev/usb/usb_request.h>
67 #include <dev/usb/usb_debug.h>
68 #include <dev/usb/usb_hub.h>
69 #include <dev/usb/usb_util.h>
70 #include <dev/usb/usb_busdma.h>
71 #include <dev/usb/usb_transfer.h>
72 #include <dev/usb/usb_dynamic.h>
73 
74 #include <dev/usb/usb_controller.h>
75 #include <dev/usb/usb_bus.h>
76 #endif					/* USB_GLOBAL_INCLUDE_FILE */
77 #include <dev/usb/usb_hub_private.h>
78 #include <contrib/dev/acpica/include/acpi.h>
79 #include <contrib/dev/acpica/include/accommon.h>
80 #include <dev/acpica/acpivar.h>
81 #include <sys/sbuf.h>
82 
83 #define ACPI_PLD_SIZE 20
84 struct acpi_uhub_port {
85 	ACPI_HANDLE handle;
86 #define    ACPI_UPC_CONNECTABLE 0x80000000
87 #define    ACPI_UPC_PORTTYPE(x) ((x)&0xff)
88 	uint32_t upc;
89 	uint8_t	pld[ACPI_PLD_SIZE];
90 };
91 
92 struct acpi_uhub_softc {
93 	struct uhub_softc usc;
94 	uint8_t	nports;
95 	ACPI_HANDLE ah;
96 	struct acpi_uhub_port *port;
97 };
98 
99 static UINT32
100 acpi_uhub_find_rh_cb(ACPI_HANDLE ah, UINT32 nl, void *ctx, void **status)
101 {
102 	ACPI_DEVICE_INFO *devinfo;
103 	UINT32 ret;
104 
105 	*status = NULL;
106 	devinfo = NULL;
107 
108 	ret = AcpiGetObjectInfo(ah, &devinfo);
109 	if (ACPI_SUCCESS(ret)) {
110 		if ((devinfo->Valid & ACPI_VALID_ADR) &&
111 		    (devinfo->Address == 0)) {
112 			ret = AE_CTRL_TERMINATE;
113 			*status = ah;
114 		}
115 		AcpiOsFree(devinfo);
116 	}
117 	return (ret);
118 }
119 
120 static const char *
121 acpi_uhub_upc_type(uint8_t type)
122 {
123 	const char *typelist[] = {"TypeA", "MiniAB", "Express",
124 				  "USB3-A", "USB3-B", "USB-MicroB",
125 				  "USB3-MicroAB", "USB3-PowerB",
126 				  "TypeC-USB2", "TypeC-Switch",
127 				  "TypeC-nonSwitch"};
128 	const int last = sizeof(typelist) / sizeof(typelist[0]);
129 
130 	if (type == 0xff) {
131 		return "Proprietary";
132 	}
133 
134 	return (type < last) ? typelist[type] : "Unknown";
135 }
136 
137 static int
138 acpi_uhub_parse_upc(device_t dev, unsigned p, ACPI_HANDLE ah, struct sysctl_oid_list *poid)
139 {
140 	ACPI_BUFFER buf;
141 	struct acpi_uhub_softc *sc = device_get_softc(dev);
142 	struct acpi_uhub_port *port = &sc->port[p - 1];
143 
144 	buf.Pointer = NULL;
145 	buf.Length = ACPI_ALLOCATE_BUFFER;
146 
147 	if (AcpiEvaluateObject(ah, "_UPC", NULL, &buf) == AE_OK) {
148 		ACPI_OBJECT *obj = buf.Pointer;
149 		UINT64 porttypenum, conn;
150 		uint8_t *connectable;
151 
152 		acpi_PkgInt(obj, 0, &conn);
153 		acpi_PkgInt(obj, 1, &porttypenum);
154 		connectable = conn ? "" : "non";
155 
156 		port->upc = porttypenum;
157 		port->upc |= (conn) ? (ACPI_UPC_CONNECTABLE) : 0;
158 
159 		if (usb_debug)
160 			device_printf(dev, "Port %u %sconnectable %s\n",
161 			    p, connectable,
162 			    acpi_uhub_upc_type(porttypenum));
163 
164 		SYSCTL_ADD_U32(
165 		    device_get_sysctl_ctx(dev),
166 		    poid, OID_AUTO,
167 		    "upc",
168 		    CTLFLAG_RD | CTLFLAG_MPSAFE,
169 		    SYSCTL_NULL_U32_PTR, port->upc,
170 		    "UPC value. MSB is visible flag");
171 	}
172 	AcpiOsFree(buf.Pointer);
173 
174 	return (0);
175 }
176 static int
177 acpi_uhub_port_sysctl(SYSCTL_HANDLER_ARGS)
178 {
179 	struct acpi_uhub_port *port = oidp->oid_arg1;
180 	struct sbuf sb;
181 	int error;
182 
183 	sbuf_new_for_sysctl(&sb, NULL, 256, req);
184 	sbuf_printf(&sb, "Handle %s\n", acpi_name(port->handle));
185 	if (port->upc == 0xffffffff) {
186 		sbuf_printf(&sb, "\tNo information\n");
187 		goto end;
188 	}
189 	sbuf_printf(&sb, "\t");
190 	if (port->upc & ACPI_UPC_CONNECTABLE) {
191 		sbuf_printf(&sb, "Connectable ");
192 	}
193 	sbuf_printf(&sb, "%s port\n", acpi_uhub_upc_type(port->upc & 0xff));
194 
195 	if ((port->pld[0] & 0x80) == 0) {
196 		sbuf_printf(&sb,
197 		    "\tColor:#%02x%02x%02x\n",
198 		    port->pld[1], port->pld[2],
199 		    port->pld[3]);
200 	}
201 	sbuf_printf(&sb, "\tWidth %d mm Height %d mm\n",
202 	    port->pld[4] | (port->pld[5] << 8),
203 	    port->pld[6] | (port->pld[7] << 8));
204 	if (port->pld[8] & 1) {
205 		sbuf_printf(&sb, "\tVisible\n");
206 	}
207 	if (port->pld[8] & 2) {
208 		sbuf_printf(&sb, "\tDock\n");
209 	}
210 	if (port->pld[8] & 4) {
211 		sbuf_printf(&sb, "\tLid\n");
212 	} {
213 		int panelpos = (port->pld[8] >> 3) & 7;
214 		const char *panposstr[] = {"Top", "Bottom", "Left",
215 					   "Right", "Front", "Back",
216 					   "Unknown", "Invalid"};
217 		const char *shapestr[] = {
218 			"Round", "Oval", "Square", "VRect", "HRect",
219 			"VTrape", "HTrape", "Unknown", "Chamferd",
220 			"Rsvd", "Rsvd", "Rsvd", "Rsvd",
221 			"Rsvd", "Rsvd", "Rsvd", "Rsvd"};
222 
223 		sbuf_printf(&sb, "\tPanelPosition: %s\n", panposstr[panelpos]);
224 		if (panelpos < 6) {
225 			const char *posstr[] = {"Upper", "Center",
226 			"Lower", "Invalid"};
227 
228 			sbuf_printf(&sb, "\tVertPosition: %s\n",
229 			    posstr[(port->pld[8] >> 6) & 3]);
230 			sbuf_printf(&sb, "\tHorizPosition: %s\n",
231 			    posstr[(port->pld[9]) & 3]);
232 		}
233 		sbuf_printf(&sb, "\tShape: %s\n",
234 		    shapestr[(port->pld[9] >> 2) & 0xf]);
235 		sbuf_printf(&sb, "\tGroup Orientation %s\n",
236 		    ((port->pld[9] >> 6) & 1) ? "Vertical" :
237 		    "Horizontal");
238 		sbuf_printf(&sb, "\tGroupToken %x\n",
239 		    ((port->pld[9] >> 7)
240 		    | (port->pld[10] << 1)) & 0xff);
241 		sbuf_printf(&sb, "\tGroupPosition %x\n",
242 		    ((port->pld[10] >> 7)
243 		    | (port->pld[11] << 1)) & 0xff);
244 		sbuf_printf(&sb, "\t%s %s %s\n",
245 		    (port->pld[11] & 0x80) ?
246 		    "Bay" : "",
247 		    (port->pld[12] & 1) ? "Eject" : "",
248 		    (port->pld[12] & 2) ? "OSPM" : ""
249 		    );
250 	}
251 	if ((port->pld[0] & 0x7f) >= 2) {
252 		sbuf_printf(&sb, "\tVOFF%d mm HOFF %dmm",
253 		    port->pld[16] | (port->pld[17] << 8),
254 		    port->pld[18] | (port->pld[19] << 8));
255 	}
256 
257 end:
258 	error = sbuf_finish(&sb);
259 	sbuf_delete(&sb);
260 	return (error);
261 }
262 
263 static int
264 acpi_uhub_parse_pld(device_t dev, unsigned p, ACPI_HANDLE ah, struct sysctl_oid_list *tree)
265 {
266 	ACPI_BUFFER buf;
267 	struct acpi_uhub_softc *sc = device_get_softc(dev);
268 	struct acpi_uhub_port *port = &sc->port[p - 1];
269 
270 	buf.Pointer = NULL;
271 	buf.Length = ACPI_ALLOCATE_BUFFER;
272 
273 	if (AcpiEvaluateObject(ah, "_PLD", NULL, &buf) == AE_OK) {
274 		ACPI_OBJECT *obj;
275 		unsigned char *resbuf;
276 		int len;
277 
278 		obj = buf.Pointer;
279 
280 		if (obj->Type == ACPI_TYPE_PACKAGE
281 		    && obj->Package.Elements[0].Type == ACPI_TYPE_BUFFER) {
282 			ACPI_OBJECT *obj1;
283 
284 			obj1 = &obj->Package.Elements[0];
285 			len = obj1->Buffer.Length;
286 			resbuf = obj1->Buffer.Pointer;
287 		} else if (obj->Type == ACPI_TYPE_BUFFER) {
288 			len = obj->Buffer.Length;
289 			resbuf = obj->Buffer.Pointer;
290 		} else {
291 			goto skip;
292 		}
293 		len = (len < ACPI_PLD_SIZE) ? len : ACPI_PLD_SIZE;
294 		memcpy(port->pld, resbuf, len);
295 		SYSCTL_ADD_OPAQUE(
296 		    device_get_sysctl_ctx(dev), tree, OID_AUTO,
297 		    "pldraw", CTLFLAG_RD | CTLFLAG_MPSAFE,
298 		    port->pld, len, "A", "Raw PLD value");
299 
300 		if (usb_debug) {
301 			device_printf(dev, "Revision:%d\n",
302 			    resbuf[0] & 0x7f);
303 			if ((resbuf[0] & 0x80) == 0) {
304 				device_printf(dev,
305 				    "Color:#%02x%02x%02x\n",
306 				    resbuf[1], resbuf[2],
307 				    resbuf[3]);
308 			}
309 			device_printf(dev, "Width %d mm Height %d mm\n",
310 			    resbuf[4] | (resbuf[5] << 8),
311 			    resbuf[6] | (resbuf[7] << 8));
312 			if (resbuf[8] & 1) {
313 				device_printf(dev, "Visible\n");
314 			}
315 			if (resbuf[8] & 2) {
316 				device_printf(dev, "Dock\n");
317 			}
318 			if (resbuf[8] & 4) {
319 				device_printf(dev, "Lid\n");
320 			}
321 			device_printf(dev, "PanelPosition: %d\n",
322 			    (resbuf[8] >> 3) & 7);
323 			device_printf(dev, "VertPosition: %d\n",
324 			    (resbuf[8] >> 6) & 3);
325 			device_printf(dev, "HorizPosition: %d\n",
326 			    (resbuf[9]) & 3);
327 			device_printf(dev, "Shape: %d\n",
328 			    (resbuf[9] >> 2) & 0xf);
329 			device_printf(dev, "80: %02x, %02x, %02x\n",
330 			    resbuf[9], resbuf[10], resbuf[11]);
331 			device_printf(dev, "96: %02x, %02x, %02x, %02x\n",
332 			    resbuf[12], resbuf[13],
333 			    resbuf[14], resbuf[15]);
334 
335 			if ((resbuf[0] & 0x7f) >= 2) {
336 				device_printf(dev, "VOFF%d mm HOFF %dmm",
337 				    resbuf[16] | (resbuf[17] << 8),
338 				    resbuf[18] | (resbuf[19] << 8));
339 			}
340 		}
341 	skip:
342 		AcpiOsFree(buf.Pointer);
343 	}
344 	return (0);
345 }
346 
347 static ACPI_STATUS
348 acpi_uhub_find_rh(device_t dev, ACPI_HANDLE *ah)
349 {
350 	device_t grand;
351 	ACPI_HANDLE gah;
352 
353 	*ah = NULL;
354 	grand = device_get_parent(device_get_parent(dev));
355 
356 	if ((gah = acpi_get_handle(grand)) == NULL)
357 		return (AE_ERROR);
358 
359 	return (AcpiWalkNamespace(ACPI_TYPE_DEVICE, gah, 1,
360 	    acpi_uhub_find_rh_cb, NULL, dev, ah));
361 }
362 
363 static ACPI_STATUS
364 acpi_usb_hub_port_probe_cb(ACPI_HANDLE ah, UINT32 lv, void *ctx, void **rv)
365 {
366 	ACPI_DEVICE_INFO *devinfo;
367 	device_t dev = ctx;
368 	struct acpi_uhub_softc *sc = device_get_softc(dev);
369 	UINT32 ret;
370 
371 	ret = AcpiGetObjectInfo(ah, &devinfo);
372 	if (ACPI_SUCCESS(ret)) {
373 		if ((devinfo->Valid & ACPI_VALID_ADR) &&
374 		    (devinfo->Address > 0) &&
375 		    (devinfo->Address <= (uint64_t)sc->nports)) {
376 			char buf[] = "portXXX";
377 			struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
378 			struct sysctl_oid *oid;
379 			struct sysctl_oid_list *tree;
380 
381 			snprintf(buf, sizeof(buf), "port%ju",
382 			    (uintmax_t)devinfo->Address);
383 			oid = SYSCTL_ADD_NODE(ctx,
384 			    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
385 			        OID_AUTO, buf, CTLFLAG_RD | CTLFLAG_MPSAFE,
386 				NULL, "port nodes");
387 			tree = SYSCTL_CHILDREN(oid);
388 			sc->port[devinfo->Address - 1].handle = ah;
389 			sc->port[devinfo->Address - 1].upc = 0xffffffff;
390 			acpi_uhub_parse_upc(dev, devinfo->Address, ah, tree);
391 			acpi_uhub_parse_pld(dev, devinfo->Address, ah, tree);
392 			SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), tree,
393 			    OID_AUTO, "info",
394 			    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
395 			    &sc->port[devinfo->Address - 1], 0,
396 			    acpi_uhub_port_sysctl, "A", "Port information");
397 		}
398 		AcpiOsFree(devinfo);
399 	}
400 	return (AE_OK);
401 }
402 
403 static ACPI_STATUS
404 acpi_usb_hub_port_probe(device_t dev, ACPI_HANDLE ah)
405 {
406 	return (AcpiWalkNamespace(ACPI_TYPE_DEVICE,
407 	    ah, 1,
408 	    acpi_usb_hub_port_probe_cb,
409 	    NULL, dev, NULL));
410 }
411 
412 static int
413 acpi_uhub_root_probe(device_t dev)
414 {
415 	ACPI_STATUS status;
416 	ACPI_HANDLE ah;
417 
418 	if (acpi_disabled("usb"))
419 		return (ENXIO);
420 
421 	status = acpi_uhub_find_rh(dev, &ah);
422 	if (ACPI_SUCCESS(status) && ah != NULL &&
423 	    uhub_probe(dev) <= 0) {
424 		/* success prior than non-ACPI USB HUB */
425 		return (BUS_PROBE_DEFAULT + 1);
426 	}
427 	return (ENXIO);
428 }
429 
430 static int
431 acpi_uhub_probe(device_t dev)
432 {
433 	ACPI_HANDLE ah;
434 
435 	if (acpi_disabled("usb"))
436 		return (ENXIO);
437 
438 	ah = acpi_get_handle(dev);
439 	if (ah == NULL)
440 		return (ENXIO);
441 
442 	if (uhub_probe(dev) <= 0) {
443 		/* success prior than non-ACPI USB HUB */
444 		return (BUS_PROBE_DEFAULT + 1);
445 	}
446 	return (ENXIO);
447 }
448 static int
449 acpi_uhub_attach_common(device_t dev)
450 {
451 	struct usb_hub *uh;
452 	struct acpi_uhub_softc *sc = device_get_softc(dev);
453 	ACPI_STATUS status;
454 	int ret = ENXIO;
455 
456 	uh = sc->usc.sc_udev->hub;
457 	sc->nports = uh->nports;
458 	sc->port = malloc(sizeof(struct acpi_uhub_port) * uh->nports,
459 	    M_USBDEV, M_WAITOK | M_ZERO);
460 	status = acpi_usb_hub_port_probe(dev, sc->ah);
461 
462 	if (ACPI_SUCCESS(status)){
463 		ret = 0;
464 	}
465 
466 	return (ret);
467 }
468 
469 static int
470 acpi_uhub_detach(device_t dev)
471 {
472 	struct acpi_uhub_softc *sc = device_get_softc(dev);
473 
474 	free(sc->port, M_USBDEV);
475 
476 	return (uhub_detach(dev));
477 }
478 
479 static int
480 acpi_uhub_root_attach(device_t dev)
481 {
482 	int ret;
483 	struct acpi_uhub_softc *sc = device_get_softc(dev);
484 
485 	if (ACPI_FAILURE(acpi_uhub_find_rh(dev, &sc->ah)) ||
486 	    (sc->ah == NULL)) {
487 		return (ENXIO);
488 	}
489 	if ((ret = uhub_attach(dev)) != 0) {
490 		return (ret);
491 	}
492 
493 	if ((ret = acpi_uhub_attach_common(dev)) != 0) {
494 		acpi_uhub_detach(dev);
495 	}
496 	return ret;
497 }
498 
499 static int
500 acpi_uhub_attach(device_t dev)
501 {
502 	int ret;
503 	struct acpi_uhub_softc *sc = device_get_softc(dev);
504 
505 	sc->ah = acpi_get_handle(dev);
506 
507 	if (sc->ah == NULL) {
508 		return (ENXIO);
509 	}
510 	if ((ret = uhub_attach(dev)) != 0) {
511 		return (ret);
512 	}
513 
514 	if ((ret = acpi_uhub_attach_common(dev)) != 0) {
515 		acpi_uhub_detach(dev);
516 	}
517 
518 	return (ret);
519 }
520 
521 static int
522 acpi_uhub_read_ivar(device_t dev, device_t child, int idx, uintptr_t *res)
523 {
524 	struct hub_result hres;
525 	struct acpi_uhub_softc *sc = device_get_softc(dev);
526 	ACPI_HANDLE ah;
527 
528 	bus_topo_lock();
529 	uhub_find_iface_index(sc->usc.sc_udev->hub, child, &hres);
530 	bus_topo_unlock();
531 
532 	if ((idx == ACPI_IVAR_HANDLE) &&
533 	    (hres.portno > 0) &&
534 	    (hres.portno <= sc->nports) &&
535 	    (ah = sc->port[hres.portno - 1].handle)) {
536 		*res = (uintptr_t)ah;
537 		return (0);
538 	}
539 	return (ENXIO);
540 }
541 
542 static int
543 acpi_uhub_child_location(device_t parent, device_t child, struct sbuf *sb)
544 {
545 	ACPI_HANDLE ah;
546 
547 	uhub_child_location(parent, child, sb);
548 
549 	ah = acpi_get_handle(child);
550 	if (ah != NULL)
551 		sbuf_printf(sb, " handle=%s", acpi_name(ah));
552 	return (0);
553 }
554 
555 static int
556 acpi_uhub_get_device_path(device_t bus, device_t child, const char *locator, struct sbuf *sb)
557 {
558 	if (strcmp(locator, BUS_LOCATOR_ACPI) == 0)
559 		return (acpi_get_acpi_device_path(bus, child, locator, sb));
560 
561 	/* Otherwise call the parent class' method. */
562 	return (uhub_get_device_path(bus, child, locator, sb));
563 }
564 
565 static device_method_t acpi_uhub_methods[] = {
566 	DEVMETHOD(device_probe, acpi_uhub_probe),
567 	DEVMETHOD(device_attach, acpi_uhub_attach),
568 	DEVMETHOD(device_detach, acpi_uhub_detach),
569 	DEVMETHOD(bus_child_location, acpi_uhub_child_location),
570 	DEVMETHOD(bus_get_device_path, acpi_uhub_get_device_path),
571 	DEVMETHOD(bus_read_ivar, acpi_uhub_read_ivar),
572 	DEVMETHOD_END
573 
574 };
575 
576 static device_method_t acpi_uhub_root_methods[] = {
577 	DEVMETHOD(device_probe, acpi_uhub_root_probe),
578 	DEVMETHOD(device_attach, acpi_uhub_root_attach),
579 	DEVMETHOD(device_detach, acpi_uhub_detach),
580 	DEVMETHOD(bus_read_ivar, acpi_uhub_read_ivar),
581 	DEVMETHOD(bus_child_location, acpi_uhub_child_location),
582 	DEVMETHOD(bus_get_device_path, acpi_uhub_get_device_path),
583 	DEVMETHOD_END
584 };
585 
586 extern driver_t uhub_driver;
587 static kobj_class_t uhub_baseclasses[] = {&uhub_driver, NULL};
588 
589 static driver_t acpi_uhub_driver = {
590 	.name = "uhub",
591 	.methods = acpi_uhub_methods,
592 	.size = sizeof(struct acpi_uhub_softc),
593 	.baseclasses = uhub_baseclasses,
594 };
595 
596 static driver_t acpi_uhub_root_driver = {
597 	.name = "uhub",
598 	.methods = acpi_uhub_root_methods,
599 	.size = sizeof(struct acpi_uhub_softc),
600 	.baseclasses = uhub_baseclasses,
601 };
602 
603 DRIVER_MODULE(uacpi, uhub, acpi_uhub_driver, 0, 0);
604 DRIVER_MODULE(uacpi, usbus, acpi_uhub_root_driver, 0, 0);
605 
606 MODULE_DEPEND(uacpi, acpi, 1, 1, 1);
607 MODULE_DEPEND(uacpi, usb, 1, 1, 1);
608 
609 MODULE_VERSION(uacpi, 1);
610