1/*	$OpenBSD: ugen.c,v 1.118 2024/05/23 03:21:09 jsg Exp $ */
2/*	$NetBSD: ugen.c,v 1.63 2002/11/26 18:49:48 christos Exp $	*/
3/*	$FreeBSD: src/sys/dev/usb/ugen.c,v 1.26 1999/11/17 22:33:41 n_hibma Exp $	*/
4
5/*
6 * Copyright (c) 1998 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Lennart Augustsson (lennart@augustsson.net) at
11 * Carlstedt Research & Technology.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/malloc.h>
39#include <sys/device.h>
40#include <sys/ioctl.h>
41#include <sys/conf.h>
42#include <sys/tty.h>
43#include <sys/fcntl.h>
44#include <sys/selinfo.h>
45#include <sys/vnode.h>
46
47#include <machine/bus.h>
48
49#include <dev/usb/usb.h>
50#include <dev/usb/usbdi.h>
51#include <dev/usb/usbdi_util.h>
52
53#ifdef UGEN_DEBUG
54#define DPRINTF(x)	do { if (ugendebug) printf x; } while (0)
55#define DPRINTFN(n,x)	do { if (ugendebug>(n)) printf x; } while (0)
56int	ugendebug = 0;
57#else
58#define DPRINTF(x)
59#define DPRINTFN(n,x)
60#endif
61
62#define	UGEN_CHUNK	128	/* chunk size for read */
63#define	UGEN_IBSIZE	1020	/* buffer size */
64#define	UGEN_BBSIZE	1024
65
66#define	UGEN_NISOFRAMES	500	/* 0.5 seconds worth */
67#define UGEN_NISOREQS	6	/* number of outstanding xfer requests */
68#define UGEN_NISORFRMS	4	/* number of frames (milliseconds) per req */
69
70struct ugen_endpoint {
71	struct ugen_softc *sc;
72	usb_endpoint_descriptor_t *edesc;
73	struct usbd_interface *iface;
74	int state;
75#define	UGEN_ASLP	0x02	/* waiting for data */
76#define UGEN_SHORT_OK	0x04	/* short xfers are OK */
77	struct usbd_pipe *pipeh;
78	struct clist q;
79	struct selinfo rsel;
80	u_char *ibuf;		/* start of buffer (circular for isoc) */
81	size_t  ibuflen;
82	u_char *fill;		/* location for input (isoc) */
83	u_char *limit;		/* end of circular buffer (isoc) */
84	u_char *cur;		/* current read location (isoc) */
85	u_int32_t timeout;
86	struct isoreq {
87		struct ugen_endpoint *sce;
88		struct usbd_xfer *xfer;
89		void *dmabuf;
90		u_int16_t sizes[UGEN_NISORFRMS];
91	} isoreqs[UGEN_NISOREQS];
92};
93
94struct ugen_softc {
95	struct device sc_dev;		/* base device */
96	struct usbd_device *sc_udev;
97
98	char sc_is_open[USB_MAX_ENDPOINTS];
99	struct ugen_endpoint sc_endpoints[USB_MAX_ENDPOINTS][2];
100#define OUT 0
101#define IN  1
102
103	int sc_refcnt;
104	u_char sc_secondary;
105};
106
107void ugenintr(struct usbd_xfer *, void *, usbd_status);
108void ugen_isoc_rintr(struct usbd_xfer *, void *, usbd_status);
109int ugen_do_read(struct ugen_softc *, int, struct uio *, int);
110int ugen_do_write(struct ugen_softc *, int, struct uio *, int);
111int ugen_do_ioctl(struct ugen_softc *, int, u_long, caddr_t, int,
112	struct proc *);
113int ugen_do_close(struct ugen_softc *, int, int);
114int ugen_set_config(struct ugen_softc *, int);
115int ugen_set_interface(struct ugen_softc *, int, int);
116int ugen_get_alt_index(struct ugen_softc *, int);
117void ugen_clear_iface_eps(struct ugen_softc *, struct usbd_interface *);
118
119#define UGENUNIT(n) ((minor(n) >> 4) & 0xf)
120#define UGENENDPOINT(n) (minor(n) & 0xf)
121#define UGENDEV(u, e) (makedev(0, ((u) << 4) | (e)))
122
123int ugen_match(struct device *, void *, void *);
124void ugen_attach(struct device *, struct device *, void *);
125int ugen_detach(struct device *, int);
126
127struct cfdriver ugen_cd = {
128	NULL, "ugen", DV_DULL
129};
130
131const struct cfattach ugen_ca = {
132	sizeof(struct ugen_softc), ugen_match, ugen_attach, ugen_detach
133};
134
135int
136ugen_match(struct device *parent, void *match, void *aux)
137{
138	struct usb_attach_arg *uaa = aux;
139
140	if (uaa->usegeneric) {
141		return (UMATCH_GENERIC);
142	} else
143		return (UMATCH_NONE);
144}
145
146void
147ugen_attach(struct device *parent, struct device *self, void *aux)
148{
149	struct ugen_softc *sc = (struct ugen_softc *)self;
150	struct usb_attach_arg *uaa = aux;
151	struct usbd_device *udev;
152	usbd_status err;
153	int conf;
154
155	sc->sc_udev = udev = uaa->device;
156
157	if (usbd_get_devcnt(udev) > 0)
158		sc->sc_secondary = 1;
159
160	if (!sc->sc_secondary) {
161		/* First set configuration index 0, the default one for ugen. */
162		err = usbd_set_config_index(udev, 0, 0);
163		if (err) {
164			printf("%s: setting configuration index 0 failed\n",
165			       sc->sc_dev.dv_xname);
166			usbd_deactivate(sc->sc_udev);
167			return;
168		}
169	}
170	conf = usbd_get_config_descriptor(udev)->bConfigurationValue;
171
172	/* Set up all the local state for this configuration. */
173	err = ugen_set_config(sc, conf);
174	if (err) {
175		printf("%s: setting configuration %d failed\n",
176		       sc->sc_dev.dv_xname, conf);
177		usbd_deactivate(sc->sc_udev);
178		return;
179	}
180}
181
182int
183ugen_set_config(struct ugen_softc *sc, int configno)
184{
185	struct usbd_device *dev = sc->sc_udev;
186	usb_config_descriptor_t *cdesc;
187	usb_interface_descriptor_t *id;
188	struct usbd_interface *iface;
189	usb_endpoint_descriptor_t *ed;
190	struct ugen_endpoint *sce;
191	int ifaceno, endptno, endpt;
192	int err, dir;
193
194	DPRINTFN(1,("ugen_set_config: %s to configno %d, sc=%p\n",
195		    sc->sc_dev.dv_xname, configno, sc));
196
197	/*
198	 * We start at 1, not 0, because we don't care whether the
199	 * control endpoint is open or not. It is always present.
200	 */
201	for (endptno = 1; endptno < USB_MAX_ENDPOINTS; endptno++)
202		if (sc->sc_is_open[endptno]) {
203			DPRINTFN(1,
204			     ("ugen_set_config: %s - endpoint %d is open\n",
205			      sc->sc_dev.dv_xname, endptno));
206			return (USBD_IN_USE);
207		}
208
209	/* Avoid setting the current value. */
210	cdesc = usbd_get_config_descriptor(dev);
211	if (cdesc == NULL || cdesc->bConfigurationValue != configno) {
212		if (sc->sc_secondary) {
213			printf("%s: secondary, not changing config to %d\n",
214			    __func__, configno);
215			return (USBD_IN_USE);
216		} else {
217			err = usbd_set_config_no(dev, configno, 1);
218			if (err)
219				return (err);
220			cdesc = usbd_get_config_descriptor(dev);
221			if (cdesc == NULL ||
222			    cdesc->bConfigurationValue != configno)
223				return (USBD_INVAL);
224		}
225	}
226
227	memset(sc->sc_endpoints, 0, sizeof sc->sc_endpoints);
228	for (ifaceno = 0; ifaceno < cdesc->bNumInterfaces; ifaceno++) {
229		DPRINTFN(1,("ugen_set_config: ifaceno %d\n", ifaceno));
230		if (usbd_iface_claimed(sc->sc_udev, ifaceno)) {
231			DPRINTF(("%s: iface %d not available\n", __func__,
232			    ifaceno));
233			continue;
234		}
235		err = usbd_device2interface_handle(dev, ifaceno, &iface);
236		if (err)
237			return (err);
238		id = usbd_get_interface_descriptor(iface);
239		for (endptno = 0; endptno < id->bNumEndpoints; endptno++) {
240			ed = usbd_interface2endpoint_descriptor(iface,endptno);
241			endpt = ed->bEndpointAddress;
242			dir = UE_GET_DIR(endpt) == UE_DIR_IN ? IN : OUT;
243			sce = &sc->sc_endpoints[UE_GET_ADDR(endpt)][dir];
244			DPRINTFN(1,("ugen_set_config: endptno %d, endpt=0x%02x"
245				    "(%d,%d), sce=%p\n",
246				    endptno, endpt, UE_GET_ADDR(endpt),
247				    UE_GET_DIR(endpt), sce));
248			sce->sc = sc;
249			sce->edesc = ed;
250			sce->iface = iface;
251		}
252	}
253	return (0);
254}
255
256int
257ugenopen(dev_t dev, int flag, int mode, struct proc *p)
258{
259	struct ugen_softc *sc;
260	int unit = UGENUNIT(dev);
261	int endpt = UGENENDPOINT(dev);
262	usb_endpoint_descriptor_t *edesc;
263	struct ugen_endpoint *sce;
264	int dir, isize;
265	usbd_status err;
266	struct usbd_xfer *xfer;
267	void *buf;
268	int i, j;
269
270	if (unit >= ugen_cd.cd_ndevs)
271		return (ENXIO);
272	sc = ugen_cd.cd_devs[unit];
273	if (sc == NULL)
274		return (ENXIO);
275
276	DPRINTFN(5, ("ugenopen: flag=%d, mode=%d, unit=%d endpt=%d\n",
277		     flag, mode, unit, endpt));
278
279	if (sc == NULL || usbd_is_dying(sc->sc_udev))
280		return (ENXIO);
281
282	if (sc->sc_is_open[endpt])
283		return (EBUSY);
284
285	if (endpt == USB_CONTROL_ENDPOINT) {
286		sc->sc_is_open[USB_CONTROL_ENDPOINT] = 1;
287		return (0);
288	}
289
290	/* Make sure there are pipes for all directions. */
291	for (dir = OUT; dir <= IN; dir++) {
292		if (flag & (dir == OUT ? FWRITE : FREAD)) {
293			sce = &sc->sc_endpoints[endpt][dir];
294			if (sce == 0 || sce->edesc == 0)
295				return (ENXIO);
296		}
297	}
298
299	/* Actually open the pipes. */
300	/* XXX Should back out properly if it fails. */
301	for (dir = OUT; dir <= IN; dir++) {
302		if (!(flag & (dir == OUT ? FWRITE : FREAD)))
303			continue;
304		sce = &sc->sc_endpoints[endpt][dir];
305		sce->state = 0;
306		sce->timeout = USBD_NO_TIMEOUT;
307		DPRINTFN(5, ("ugenopen: sc=%p, endpt=%d, dir=%d, sce=%p\n",
308			     sc, endpt, dir, sce));
309		edesc = sce->edesc;
310		/* Clear device endpoint toggle. */
311		ugen_clear_iface_eps(sc, sce->iface);
312		switch (UE_GET_XFERTYPE(edesc->bmAttributes)) {
313		case UE_INTERRUPT:
314			if (dir == OUT) {
315				err = usbd_open_pipe(sce->iface,
316				    edesc->bEndpointAddress, 0, &sce->pipeh);
317				if (err)
318					return (EIO);
319				break;
320			}
321			isize = UGETW(edesc->wMaxPacketSize);
322			if (isize == 0)	/* shouldn't happen */
323				return (EINVAL);
324			sce->ibuflen = isize;
325			sce->ibuf = malloc(sce->ibuflen, M_USBDEV, M_WAITOK);
326			DPRINTFN(5, ("ugenopen: intr endpt=%d,isize=%d\n",
327				     endpt, isize));
328			clalloc(&sce->q, UGEN_IBSIZE, 0);
329			err = usbd_open_pipe_intr(sce->iface,
330				  edesc->bEndpointAddress,
331				  USBD_SHORT_XFER_OK, &sce->pipeh, sce,
332				  sce->ibuf, isize, ugenintr,
333				  USBD_DEFAULT_INTERVAL);
334			if (err) {
335				free(sce->ibuf, M_USBDEV, sce->ibuflen);
336				clfree(&sce->q);
337				return (EIO);
338			}
339			/* Clear HC endpoint toggle. */
340			usbd_clear_endpoint_toggle(sce->pipeh);
341			DPRINTFN(5, ("ugenopen: interrupt open done\n"));
342			break;
343		case UE_BULK:
344			err = usbd_open_pipe(sce->iface,
345				  edesc->bEndpointAddress, 0, &sce->pipeh);
346			if (err)
347				return (EIO);
348			/* Clear HC endpoint toggle. */
349			usbd_clear_endpoint_toggle(sce->pipeh);
350			break;
351		case UE_ISOCHRONOUS:
352			if (dir == OUT)
353				return (EINVAL);
354			isize = UGETW(edesc->wMaxPacketSize);
355			if (isize == 0)	/* shouldn't happen */
356				return (EINVAL);
357			sce->ibuflen = isize * UGEN_NISOFRAMES;
358			sce->ibuf = mallocarray(isize, UGEN_NISOFRAMES,
359				M_USBDEV, M_WAITOK);
360			sce->cur = sce->fill = sce->ibuf;
361			sce->limit = sce->ibuf + isize * UGEN_NISOFRAMES;
362			DPRINTFN(5, ("ugenopen: isoc endpt=%d, isize=%d\n",
363				     endpt, isize));
364			err = usbd_open_pipe(sce->iface,
365				  edesc->bEndpointAddress, 0, &sce->pipeh);
366			if (err) {
367				free(sce->ibuf, M_USBDEV, sce->ibuflen);
368				return (EIO);
369			}
370			for(i = 0; i < UGEN_NISOREQS; ++i) {
371				sce->isoreqs[i].sce = sce;
372				xfer = usbd_alloc_xfer(sc->sc_udev);
373				if (xfer == 0)
374					goto bad;
375				sce->isoreqs[i].xfer = xfer;
376				buf = usbd_alloc_buffer
377					(xfer, isize * UGEN_NISORFRMS);
378				if (buf == 0) {
379					i++;
380					goto bad;
381				}
382				sce->isoreqs[i].dmabuf = buf;
383				for(j = 0; j < UGEN_NISORFRMS; ++j)
384					sce->isoreqs[i].sizes[j] = isize;
385				usbd_setup_isoc_xfer(xfer, sce->pipeh,
386				    &sce->isoreqs[i], sce->isoreqs[i].sizes,
387				    UGEN_NISORFRMS, USBD_NO_COPY |
388				    USBD_SHORT_XFER_OK, ugen_isoc_rintr);
389				(void)usbd_transfer(xfer);
390			}
391			DPRINTFN(5, ("ugenopen: isoc open done\n"));
392			break;
393		bad:
394			while (--i >= 0) /* implicit buffer free */
395				usbd_free_xfer(sce->isoreqs[i].xfer);
396			return (ENOMEM);
397		case UE_CONTROL:
398			sce->timeout = USBD_DEFAULT_TIMEOUT;
399			return (EINVAL);
400		}
401	}
402	sc->sc_is_open[endpt] = 1;
403	return (0);
404}
405
406int
407ugenclose(dev_t dev, int flag, int mode, struct proc *p)
408{
409	struct ugen_softc *sc = ugen_cd.cd_devs[UGENUNIT(dev)];
410	int endpt = UGENENDPOINT(dev);
411	int error;
412
413	if (sc == NULL || usbd_is_dying(sc->sc_udev))
414		return (EIO);
415
416	DPRINTFN(5, ("ugenclose: flag=%d, mode=%d, unit=%d, endpt=%d\n",
417		     flag, mode, UGENUNIT(dev), endpt));
418
419	sc->sc_refcnt++;
420	error = ugen_do_close(sc, endpt, flag);
421	if (--sc->sc_refcnt < 0)
422		usb_detach_wakeup(&sc->sc_dev);
423
424	return (error);
425}
426
427int
428ugen_do_close(struct ugen_softc *sc, int endpt, int flag)
429{
430	struct ugen_endpoint *sce;
431	int dir, i;
432
433#ifdef DIAGNOSTIC
434	if (!sc->sc_is_open[endpt]) {
435		printf("ugenclose: not open\n");
436		return (EINVAL);
437	}
438#endif
439
440	if (endpt == USB_CONTROL_ENDPOINT) {
441		DPRINTFN(5, ("ugenclose: close control\n"));
442		sc->sc_is_open[endpt] = 0;
443		return (0);
444	}
445
446	for (dir = OUT; dir <= IN; dir++) {
447		if (!(flag & (dir == OUT ? FWRITE : FREAD)))
448			continue;
449		sce = &sc->sc_endpoints[endpt][dir];
450		if (sce == NULL || sce->pipeh == NULL)
451			continue;
452		DPRINTFN(5, ("ugenclose: endpt=%d dir=%d sce=%p\n",
453			     endpt, dir, sce));
454
455		usbd_close_pipe(sce->pipeh);
456		sce->pipeh = NULL;
457
458		switch (UE_GET_XFERTYPE(sce->edesc->bmAttributes)) {
459		case UE_INTERRUPT:
460			ndflush(&sce->q, sce->q.c_cc);
461			clfree(&sce->q);
462			break;
463		case UE_ISOCHRONOUS:
464			for (i = 0; i < UGEN_NISOREQS; ++i)
465				usbd_free_xfer(sce->isoreqs[i].xfer);
466
467		default:
468			break;
469		}
470
471		if (sce->ibuf != NULL) {
472			free(sce->ibuf, M_USBDEV, sce->ibuflen);
473			sce->ibuf = NULL;
474		}
475	}
476	sc->sc_is_open[endpt] = 0;
477
478	return (0);
479}
480
481int
482ugen_do_read(struct ugen_softc *sc, int endpt, struct uio *uio, int flag)
483{
484	struct ugen_endpoint *sce = &sc->sc_endpoints[endpt][IN];
485	u_int32_t tn;
486	size_t n;
487	char buf[UGEN_BBSIZE];
488	struct usbd_xfer *xfer;
489	usbd_status err;
490	int s;
491	int flags, error = 0;
492	u_char buffer[UGEN_CHUNK];
493
494	DPRINTFN(5, ("%s: ugenread: %d\n", sc->sc_dev.dv_xname, endpt));
495
496	if (usbd_is_dying(sc->sc_udev))
497		return (EIO);
498
499	if (endpt == USB_CONTROL_ENDPOINT)
500		return (ENODEV);
501
502#ifdef DIAGNOSTIC
503	if (sce->edesc == NULL) {
504		printf("ugenread: no edesc\n");
505		return (EIO);
506	}
507	if (sce->pipeh == NULL) {
508		printf("ugenread: no pipe\n");
509		return (EIO);
510	}
511#endif
512
513	switch (UE_GET_XFERTYPE(sce->edesc->bmAttributes)) {
514	case UE_INTERRUPT:
515		/* Block until activity occurred. */
516		s = splusb();
517		while (sce->q.c_cc == 0) {
518			if (flag & IO_NDELAY) {
519				splx(s);
520				return (EWOULDBLOCK);
521			}
522			sce->state |= UGEN_ASLP;
523			DPRINTFN(5, ("ugenread: sleep on %p\n", sce));
524			error = tsleep_nsec(sce, PZERO | PCATCH, "ugenrintr",
525			    MSEC_TO_NSEC(sce->timeout));
526			sce->state &= ~UGEN_ASLP;
527			DPRINTFN(5, ("ugenread: woke, error=%d\n", error));
528			if (usbd_is_dying(sc->sc_udev))
529				error = EIO;
530			if (error == EWOULDBLOCK) {	/* timeout, return 0 */
531				error = 0;
532				break;
533			}
534			if (error)
535				break;
536		}
537		splx(s);
538
539		/* Transfer as many chunks as possible. */
540		while (sce->q.c_cc > 0 && uio->uio_resid > 0 && !error) {
541			n = ulmin(sce->q.c_cc, uio->uio_resid);
542			if (n > sizeof(buffer))
543				n = sizeof(buffer);
544
545			/* Remove a small chunk from the input queue. */
546			q_to_b(&sce->q, buffer, n);
547			DPRINTFN(5, ("ugenread: got %zu chars\n", n));
548
549			/* Copy the data to the user process. */
550			error = uiomove(buffer, n, uio);
551			if (error)
552				break;
553		}
554		break;
555	case UE_BULK:
556		xfer = usbd_alloc_xfer(sc->sc_udev);
557		if (xfer == 0)
558			return (ENOMEM);
559		flags = USBD_SYNCHRONOUS;
560		if (sce->state & UGEN_SHORT_OK)
561			flags |= USBD_SHORT_XFER_OK;
562		if (sce->timeout == 0)
563			flags |= USBD_CATCH;
564		while ((n = ulmin(UGEN_BBSIZE, uio->uio_resid)) != 0) {
565			DPRINTFN(1, ("ugenread: start transfer %zu bytes\n",n));
566			usbd_setup_xfer(xfer, sce->pipeh, 0, buf, n,
567			    flags, sce->timeout, NULL);
568			err = usbd_transfer(xfer);
569			if (err) {
570				usbd_clear_endpoint_stall(sce->pipeh);
571				if (err == USBD_INTERRUPTED)
572					error = EINTR;
573				else if (err == USBD_TIMEOUT)
574					error = ETIMEDOUT;
575				else
576					error = EIO;
577				break;
578			}
579			usbd_get_xfer_status(xfer, NULL, NULL, &tn, NULL);
580			DPRINTFN(1, ("ugenread: got %u bytes\n", tn));
581			error = uiomove(buf, tn, uio);
582			if (error || tn < n)
583				break;
584		}
585		usbd_free_xfer(xfer);
586		break;
587	case UE_ISOCHRONOUS:
588		s = splusb();
589		while (sce->cur == sce->fill) {
590			if (flag & IO_NDELAY) {
591				splx(s);
592				return (EWOULDBLOCK);
593			}
594			sce->state |= UGEN_ASLP;
595			DPRINTFN(5, ("ugenread: sleep on %p\n", sce));
596			error = tsleep_nsec(sce, PZERO | PCATCH, "ugenriso",
597			    MSEC_TO_NSEC(sce->timeout));
598			sce->state &= ~UGEN_ASLP;
599			DPRINTFN(5, ("ugenread: woke, error=%d\n", error));
600			if (usbd_is_dying(sc->sc_udev))
601				error = EIO;
602			if (error == EWOULDBLOCK) {	/* timeout, return 0 */
603				error = 0;
604				break;
605			}
606			if (error)
607				break;
608		}
609
610		while (sce->cur != sce->fill && uio->uio_resid > 0 && !error) {
611			if(sce->fill > sce->cur)
612				n = ulmin(sce->fill - sce->cur, uio->uio_resid);
613			else
614				n = ulmin(sce->limit - sce->cur, uio->uio_resid);
615
616			DPRINTFN(5, ("ugenread: isoc got %zu chars\n", n));
617
618			/* Copy the data to the user process. */
619			error = uiomove(sce->cur, n, uio);
620			if (error)
621				break;
622			sce->cur += n;
623			if(sce->cur >= sce->limit)
624				sce->cur = sce->ibuf;
625		}
626		splx(s);
627		break;
628
629
630	default:
631		return (ENXIO);
632	}
633	return (error);
634}
635
636int
637ugenread(dev_t dev, struct uio *uio, int flag)
638{
639	int endpt = UGENENDPOINT(dev);
640	struct ugen_softc *sc;
641	int error;
642
643	sc = ugen_cd.cd_devs[UGENUNIT(dev)];
644
645	sc->sc_refcnt++;
646	error = ugen_do_read(sc, endpt, uio, flag);
647	if (--sc->sc_refcnt < 0)
648		usb_detach_wakeup(&sc->sc_dev);
649	return (error);
650}
651
652int
653ugen_do_write(struct ugen_softc *sc, int endpt, struct uio *uio, int flag)
654{
655	struct ugen_endpoint *sce = &sc->sc_endpoints[endpt][OUT];
656	size_t n;
657	int flags, error = 0;
658	char buf[UGEN_BBSIZE];
659	struct usbd_xfer *xfer;
660	usbd_status err;
661
662	DPRINTFN(5, ("%s: ugenwrite: %d\n", sc->sc_dev.dv_xname, endpt));
663
664	if (usbd_is_dying(sc->sc_udev))
665		return (EIO);
666
667	if (endpt == USB_CONTROL_ENDPOINT)
668		return (ENODEV);
669
670#ifdef DIAGNOSTIC
671	if (sce->edesc == NULL) {
672		printf("ugenwrite: no edesc\n");
673		return (EIO);
674	}
675	if (sce->pipeh == NULL) {
676		printf("ugenwrite: no pipe\n");
677		return (EIO);
678	}
679#endif
680	flags = USBD_SYNCHRONOUS;
681	if (sce->timeout == 0)
682		flags |= USBD_CATCH;
683
684	switch (UE_GET_XFERTYPE(sce->edesc->bmAttributes)) {
685	case UE_BULK:
686		xfer = usbd_alloc_xfer(sc->sc_udev);
687		if (xfer == 0)
688			return (EIO);
689		while ((n = ulmin(UGEN_BBSIZE, uio->uio_resid)) != 0) {
690			error = uiomove(buf, n, uio);
691			if (error)
692				break;
693			DPRINTFN(1, ("ugenwrite: transfer %zu bytes\n", n));
694			usbd_setup_xfer(xfer, sce->pipeh, 0, buf, n,
695			    flags, sce->timeout, NULL);
696			err = usbd_transfer(xfer);
697			if (err) {
698				usbd_clear_endpoint_stall(sce->pipeh);
699				if (err == USBD_INTERRUPTED)
700					error = EINTR;
701				else if (err == USBD_TIMEOUT)
702					error = ETIMEDOUT;
703				else
704					error = EIO;
705				break;
706			}
707		}
708		usbd_free_xfer(xfer);
709		break;
710	case UE_INTERRUPT:
711		xfer = usbd_alloc_xfer(sc->sc_udev);
712		if (xfer == 0)
713			return (EIO);
714		while ((n = ulmin(UGETW(sce->edesc->wMaxPacketSize),
715		    uio->uio_resid)) != 0) {
716			error = uiomove(buf, n, uio);
717			if (error)
718				break;
719			DPRINTFN(1, ("ugenwrite: transfer %zu bytes\n", n));
720			usbd_setup_xfer(xfer, sce->pipeh, 0, buf, n,
721			    flags, sce->timeout, NULL);
722			err = usbd_transfer(xfer);
723			if (err) {
724				usbd_clear_endpoint_stall(sce->pipeh);
725				if (err == USBD_INTERRUPTED)
726					error = EINTR;
727				else if (err == USBD_TIMEOUT)
728					error = ETIMEDOUT;
729				else
730					error = EIO;
731				break;
732			}
733		}
734		usbd_free_xfer(xfer);
735		break;
736	default:
737		return (ENXIO);
738	}
739	return (error);
740}
741
742int
743ugenwrite(dev_t dev, struct uio *uio, int flag)
744{
745	int endpt = UGENENDPOINT(dev);
746	struct ugen_softc *sc;
747	int error;
748
749	sc = ugen_cd.cd_devs[UGENUNIT(dev)];
750
751	sc->sc_refcnt++;
752	error = ugen_do_write(sc, endpt, uio, flag);
753	if (--sc->sc_refcnt < 0)
754		usb_detach_wakeup(&sc->sc_dev);
755	return (error);
756}
757
758int
759ugen_detach(struct device *self, int flags)
760{
761	struct ugen_softc *sc = (struct ugen_softc *)self;
762	struct ugen_endpoint *sce;
763	int i, dir, endptno;
764	int s, maj, mn;
765
766	DPRINTF(("ugen_detach: sc=%p flags=%d\n", sc, flags));
767
768	/* Abort all pipes.  Causes processes waiting for transfer to wake. */
769	for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
770		for (dir = OUT; dir <= IN; dir++) {
771			sce = &sc->sc_endpoints[i][dir];
772			if (sce && sce->pipeh)
773				usbd_abort_pipe(sce->pipeh);
774		}
775	}
776
777	s = splusb();
778	if (--sc->sc_refcnt >= 0) {
779		/* Wake everyone */
780		for (i = 0; i < USB_MAX_ENDPOINTS; i++)
781			wakeup(&sc->sc_endpoints[i][IN]);
782		/* Wait for processes to go away. */
783		usb_detach_wait(&sc->sc_dev);
784	}
785	splx(s);
786
787	/* locate the major number */
788	for (maj = 0; maj < nchrdev; maj++)
789		if (cdevsw[maj].d_open == ugenopen)
790			break;
791
792	/* Nuke the vnodes for any open instances (calls close). */
793	mn = self->dv_unit * USB_MAX_ENDPOINTS;
794	vdevgone(maj, mn, mn + USB_MAX_ENDPOINTS - 1, VCHR);
795
796	for (endptno = 0; endptno < USB_MAX_ENDPOINTS; endptno++) {
797		if (sc->sc_is_open[endptno])
798			ugen_do_close(sc, endptno, FREAD|FWRITE);
799
800		/* ugenkqfilter() always uses IN. */
801		sce = &sc->sc_endpoints[endptno][IN];
802		klist_invalidate(&sce->rsel.si_note);
803	}
804	return (0);
805}
806
807void
808ugenintr(struct usbd_xfer *xfer, void *addr, usbd_status status)
809{
810	struct ugen_endpoint *sce = addr;
811	/*struct ugen_softc *sc = sce->sc;*/
812	u_int32_t count;
813	u_char *ibuf;
814
815	if (status == USBD_CANCELLED)
816		return;
817
818	if (status != USBD_NORMAL_COMPLETION) {
819		DPRINTF(("ugenintr: status=%d\n", status));
820		if (status == USBD_STALLED)
821			usbd_clear_endpoint_stall_async(sce->pipeh);
822		return;
823	}
824
825	usbd_get_xfer_status(xfer, NULL, NULL, &count, NULL);
826	ibuf = sce->ibuf;
827
828	DPRINTFN(5, ("ugenintr: xfer=%p status=%d count=%d\n",
829		     xfer, status, count));
830	DPRINTFN(5, ("          data = %02x %02x %02x\n",
831		     ibuf[0], ibuf[1], ibuf[2]));
832
833	(void)b_to_q(ibuf, count, &sce->q);
834
835	if (sce->state & UGEN_ASLP) {
836		sce->state &= ~UGEN_ASLP;
837		DPRINTFN(5, ("ugen_intr: waking %p\n", sce));
838		wakeup(sce);
839	}
840	selwakeup(&sce->rsel);
841}
842
843void
844ugen_isoc_rintr(struct usbd_xfer *xfer, void *addr, usbd_status status)
845{
846	struct isoreq *req = addr;
847	struct ugen_endpoint *sce = req->sce;
848	u_int32_t count, n;
849	int i, isize;
850
851	/* Return if we are aborting. */
852	if (status == USBD_CANCELLED)
853		return;
854
855	usbd_get_xfer_status(xfer, NULL, NULL, &count, NULL);
856	DPRINTFN(5,("%s: xfer %ld, count=%d\n", __func__, req - sce->isoreqs,
857	    count));
858
859	/* throw away oldest input if the buffer is full */
860	if(sce->fill < sce->cur && sce->cur <= sce->fill + count) {
861		sce->cur += count;
862		if(sce->cur >= sce->limit)
863			sce->cur = sce->ibuf + (sce->limit - sce->cur);
864		DPRINTFN(5, ("%s: throwing away %d bytes\n", __func__, count));
865	}
866
867	isize = UGETW(sce->edesc->wMaxPacketSize);
868	for (i = 0; i < UGEN_NISORFRMS; i++) {
869		u_int32_t actlen = req->sizes[i];
870		char const *buf = (char const *)req->dmabuf + isize * i;
871
872		/* copy data to buffer */
873		while (actlen > 0) {
874			n = min(actlen, sce->limit - sce->fill);
875			memcpy(sce->fill, buf, n);
876
877			buf += n;
878			actlen -= n;
879			sce->fill += n;
880			if(sce->fill == sce->limit)
881				sce->fill = sce->ibuf;
882		}
883
884		/* setup size for next transfer */
885		req->sizes[i] = isize;
886	}
887
888	usbd_setup_isoc_xfer(xfer, sce->pipeh, req, req->sizes, UGEN_NISORFRMS,
889	    USBD_NO_COPY | USBD_SHORT_XFER_OK, ugen_isoc_rintr);
890	(void)usbd_transfer(xfer);
891
892	if (sce->state & UGEN_ASLP) {
893		sce->state &= ~UGEN_ASLP;
894		DPRINTFN(5, ("ugen_isoc_rintr: waking %p\n", sce));
895		wakeup(sce);
896	}
897	selwakeup(&sce->rsel);
898}
899
900int
901ugen_set_interface(struct ugen_softc *sc, int ifaceno, int altno)
902{
903	struct usbd_interface *iface;
904	usb_config_descriptor_t *cdesc;
905	usb_interface_descriptor_t *id;
906	usb_endpoint_descriptor_t *ed;
907	struct ugen_endpoint *sce;
908	uint8_t  endptno, endpt;
909	int dir, err;
910
911	DPRINTFN(15, ("ugen_set_interface %d %d\n", ifaceno, altno));
912
913	cdesc = usbd_get_config_descriptor(sc->sc_udev);
914	if (ifaceno < 0 || ifaceno >= cdesc->bNumInterfaces ||
915	    usbd_iface_claimed(sc->sc_udev, ifaceno))
916		return (USBD_INVAL);
917
918	err = usbd_device2interface_handle(sc->sc_udev, ifaceno, &iface);
919	if (err)
920		return (err);
921	id = usbd_get_interface_descriptor(iface);
922	for (endptno = 0; endptno < id->bNumEndpoints; endptno++) {
923		ed = usbd_interface2endpoint_descriptor(iface,endptno);
924		endpt = ed->bEndpointAddress;
925		dir = UE_GET_DIR(endpt) == UE_DIR_IN ? IN : OUT;
926		sce = &sc->sc_endpoints[UE_GET_ADDR(endpt)][dir];
927		sce->sc = 0;
928		sce->edesc = 0;
929		sce->iface = 0;
930	}
931
932	/* Try to change setting, if this fails put back the descriptors. */
933	err = usbd_set_interface(iface, altno);
934
935	id = usbd_get_interface_descriptor(iface);
936	for (endptno = 0; endptno < id->bNumEndpoints; endptno++) {
937		ed = usbd_interface2endpoint_descriptor(iface,endptno);
938		endpt = ed->bEndpointAddress;
939		dir = UE_GET_DIR(endpt) == UE_DIR_IN ? IN : OUT;
940		sce = &sc->sc_endpoints[UE_GET_ADDR(endpt)][dir];
941		sce->sc = sc;
942		sce->edesc = ed;
943		sce->iface = iface;
944	}
945	return (err);
946}
947
948int
949ugen_get_alt_index(struct ugen_softc *sc, int ifaceno)
950{
951	struct usbd_interface *iface;
952	usbd_status err;
953
954	err = usbd_device2interface_handle(sc->sc_udev, ifaceno, &iface);
955	if (err)
956		return (-1);
957	return (usbd_get_interface_altindex(iface));
958}
959
960int
961ugen_do_ioctl(struct ugen_softc *sc, int endpt, u_long cmd, caddr_t addr,
962    int flag, struct proc *p)
963{
964	struct ugen_endpoint *sce;
965	int err, cdesc_len;
966	struct usbd_interface *iface;
967	struct usb_config_desc *cd;
968	usb_config_descriptor_t *cdesc;
969	struct usb_interface_desc *id;
970	usb_interface_descriptor_t *idesc;
971	struct usb_endpoint_desc *ed;
972	usb_endpoint_descriptor_t *edesc;
973	struct usb_alt_interface *ai;
974	u_int8_t conf, alt;
975
976	DPRINTFN(5, ("ugenioctl: cmd=%08lx\n", cmd));
977	if (usbd_is_dying(sc->sc_udev))
978		return (EIO);
979
980	switch (cmd) {
981	case FIONBIO:
982		/* All handled in the upper FS layer. */
983		return (0);
984	case USB_SET_SHORT_XFER:
985		if (endpt == USB_CONTROL_ENDPOINT)
986			return (EINVAL);
987		/* This flag only affects read */
988		sce = &sc->sc_endpoints[endpt][IN];
989		if (sce == NULL || sce->pipeh == NULL)
990			return (EINVAL);
991		if (*(int *)addr)
992			sce->state |= UGEN_SHORT_OK;
993		else
994			sce->state &= ~UGEN_SHORT_OK;
995		return (0);
996	case USB_SET_TIMEOUT:
997		sce = &sc->sc_endpoints[endpt][IN];
998		if (sce == NULL)
999			return (EINVAL);
1000		sce->timeout = *(int *)addr;
1001		sce = &sc->sc_endpoints[endpt][OUT];
1002		if (sce == NULL)
1003			return (EINVAL);
1004		sce->timeout = *(int *)addr;
1005		return (0);
1006	default:
1007		break;
1008	}
1009
1010	if (endpt != USB_CONTROL_ENDPOINT)
1011		return (EINVAL);
1012
1013	switch (cmd) {
1014#ifdef UGEN_DEBUG
1015	case USB_SETDEBUG:
1016		ugendebug = *(int *)addr;
1017		break;
1018#endif
1019	case USB_GET_CONFIG:
1020		err = usbd_get_config(sc->sc_udev, &conf);
1021		if (err)
1022			return (EIO);
1023		*(int *)addr = conf;
1024		break;
1025	case USB_SET_CONFIG:
1026		if (!(flag & FWRITE))
1027			return (EPERM);
1028		err = ugen_set_config(sc, *(int *)addr);
1029		switch (err) {
1030		case USBD_NORMAL_COMPLETION:
1031			break;
1032		case USBD_IN_USE:
1033			return (EBUSY);
1034		default:
1035			return (EIO);
1036		}
1037		break;
1038	case USB_GET_ALTINTERFACE:
1039		ai = (struct usb_alt_interface *)addr;
1040		err = usbd_device2interface_handle(sc->sc_udev,
1041			  ai->uai_interface_index, &iface);
1042		if (err)
1043			return (EINVAL);
1044		idesc = usbd_get_interface_descriptor(iface);
1045		if (idesc == NULL)
1046			return (EIO);
1047		ai->uai_alt_no = idesc->bAlternateSetting;
1048		break;
1049	case USB_SET_ALTINTERFACE:
1050		if (!(flag & FWRITE))
1051			return (EPERM);
1052		ai = (struct usb_alt_interface *)addr;
1053		err = usbd_device2interface_handle(sc->sc_udev,
1054			  ai->uai_interface_index, &iface);
1055		if (err)
1056			return (EINVAL);
1057		err = ugen_set_interface(sc, ai->uai_interface_index,
1058		    ai->uai_alt_no);
1059		if (err)
1060			return (EINVAL);
1061		break;
1062	case USB_GET_NO_ALT:
1063		ai = (struct usb_alt_interface *)addr;
1064		cdesc = usbd_get_cdesc(sc->sc_udev, ai->uai_config_index,
1065		    &cdesc_len);
1066		if (cdesc == NULL)
1067			return (EINVAL);
1068		idesc = usbd_find_idesc(cdesc, ai->uai_interface_index, 0);
1069		if (idesc == NULL) {
1070			free(cdesc, M_TEMP, UGETW(cdesc->wTotalLength));
1071			return (EINVAL);
1072		}
1073		ai->uai_alt_no = usbd_get_no_alts(cdesc,
1074		    idesc->bInterfaceNumber);
1075		free(cdesc, M_TEMP, cdesc_len);
1076		break;
1077	case USB_GET_DEVICE_DESC:
1078		*(usb_device_descriptor_t *)addr =
1079			*usbd_get_device_descriptor(sc->sc_udev);
1080		break;
1081	case USB_GET_CONFIG_DESC:
1082		cd = (struct usb_config_desc *)addr;
1083		cdesc = usbd_get_cdesc(sc->sc_udev, cd->ucd_config_index,
1084		    &cdesc_len);
1085		if (cdesc == NULL)
1086			return (EINVAL);
1087		cd->ucd_desc = *cdesc;
1088		free(cdesc, M_TEMP, cdesc_len);
1089		break;
1090	case USB_GET_INTERFACE_DESC:
1091		id = (struct usb_interface_desc *)addr;
1092		cdesc = usbd_get_cdesc(sc->sc_udev, id->uid_config_index,
1093		    &cdesc_len);
1094		if (cdesc == NULL)
1095			return (EINVAL);
1096		if (id->uid_config_index == USB_CURRENT_CONFIG_INDEX &&
1097		    id->uid_alt_index == USB_CURRENT_ALT_INDEX)
1098			alt = ugen_get_alt_index(sc, id->uid_interface_index);
1099		else
1100			alt = id->uid_alt_index;
1101		idesc = usbd_find_idesc(cdesc, id->uid_interface_index, alt);
1102		if (idesc == NULL) {
1103			free(cdesc, M_TEMP, UGETW(cdesc->wTotalLength));
1104			return (EINVAL);
1105		}
1106		id->uid_desc = *idesc;
1107		free(cdesc, M_TEMP, cdesc_len);
1108		break;
1109	case USB_GET_ENDPOINT_DESC:
1110		ed = (struct usb_endpoint_desc *)addr;
1111		cdesc = usbd_get_cdesc(sc->sc_udev, ed->ued_config_index,
1112		    &cdesc_len);
1113		if (cdesc == NULL)
1114			return (EINVAL);
1115		if (ed->ued_config_index == USB_CURRENT_CONFIG_INDEX &&
1116		    ed->ued_alt_index == USB_CURRENT_ALT_INDEX)
1117			alt = ugen_get_alt_index(sc, ed->ued_interface_index);
1118		else
1119			alt = ed->ued_alt_index;
1120		edesc = usbd_find_edesc(cdesc, ed->ued_interface_index,
1121					alt, ed->ued_endpoint_index);
1122		if (edesc == NULL) {
1123			free(cdesc, M_TEMP, UGETW(cdesc->wTotalLength));
1124			return (EINVAL);
1125		}
1126		ed->ued_desc = *edesc;
1127		free(cdesc, M_TEMP, cdesc_len);
1128		break;
1129	case USB_GET_FULL_DESC:
1130	{
1131		u_int len;
1132		struct iovec iov;
1133		struct uio uio;
1134		struct usb_full_desc *fd = (struct usb_full_desc *)addr;
1135		int error;
1136
1137		cdesc = usbd_get_cdesc(sc->sc_udev, fd->ufd_config_index,
1138		    &cdesc_len);
1139		if (cdesc == NULL)
1140			return (EINVAL);
1141		len = cdesc_len;
1142		if (len > fd->ufd_size)
1143			len = fd->ufd_size;
1144		iov.iov_base = (caddr_t)fd->ufd_data;
1145		iov.iov_len = len;
1146		uio.uio_iov = &iov;
1147		uio.uio_iovcnt = 1;
1148		uio.uio_resid = len;
1149		uio.uio_offset = 0;
1150		uio.uio_segflg = UIO_USERSPACE;
1151		uio.uio_rw = UIO_READ;
1152		uio.uio_procp = p;
1153		error = uiomove((void *)cdesc, len, &uio);
1154		free(cdesc, M_TEMP, cdesc_len);
1155		return (error);
1156	}
1157	case USB_DO_REQUEST:
1158	{
1159		struct usb_ctl_request *ur = (void *)addr;
1160		size_t len = UGETW(ur->ucr_request.wLength), mlen;
1161		struct iovec iov;
1162		struct uio uio;
1163		void *ptr = NULL;
1164		int error = 0;
1165
1166		if (!(flag & FWRITE))
1167			return (EPERM);
1168		/* Avoid requests that would damage the bus integrity. */
1169		if ((ur->ucr_request.bmRequestType == UT_WRITE_DEVICE &&
1170		     ur->ucr_request.bRequest == UR_SET_ADDRESS) ||
1171		    (ur->ucr_request.bmRequestType == UT_WRITE_DEVICE &&
1172		     ur->ucr_request.bRequest == UR_SET_CONFIG) ||
1173		    (ur->ucr_request.bmRequestType == UT_WRITE_INTERFACE &&
1174		     ur->ucr_request.bRequest == UR_SET_INTERFACE))
1175			return (EINVAL);
1176
1177		if (len > 32767)
1178			return (EINVAL);
1179		if (len != 0) {
1180			iov.iov_base = (caddr_t)ur->ucr_data;
1181			iov.iov_len = len;
1182			uio.uio_iov = &iov;
1183			uio.uio_iovcnt = 1;
1184			uio.uio_resid = len;
1185			uio.uio_offset = 0;
1186			uio.uio_segflg = UIO_USERSPACE;
1187			uio.uio_rw =
1188				ur->ucr_request.bmRequestType & UT_READ ?
1189				UIO_READ : UIO_WRITE;
1190			uio.uio_procp = p;
1191			if ((ptr = malloc(len, M_TEMP, M_NOWAIT)) == NULL) {
1192				error = ENOMEM;
1193				goto ret;
1194			}
1195			if (uio.uio_rw == UIO_WRITE) {
1196				error = uiomove(ptr, len, &uio);
1197				if (error)
1198					goto ret;
1199			}
1200		}
1201		sce = &sc->sc_endpoints[endpt][IN];
1202		err = usbd_do_request_flags(sc->sc_udev, &ur->ucr_request,
1203			  ptr, ur->ucr_flags, &ur->ucr_actlen, sce->timeout);
1204		if (err) {
1205			error = EIO;
1206			goto ret;
1207		}
1208		/* Only if USBD_SHORT_XFER_OK is set. */
1209		mlen = len;
1210		if (mlen > ur->ucr_actlen)
1211			mlen = ur->ucr_actlen;
1212		if (mlen != 0) {
1213			if (uio.uio_rw == UIO_READ) {
1214				error = uiomove(ptr, mlen, &uio);
1215				if (error)
1216					goto ret;
1217			}
1218		}
1219	ret:
1220		free(ptr, M_TEMP, len);
1221		return (error);
1222	}
1223	case USB_GET_DEVICEINFO:
1224		usbd_fill_deviceinfo(sc->sc_udev,
1225				     (struct usb_device_info *)addr);
1226		break;
1227	default:
1228		return (EINVAL);
1229	}
1230	return (0);
1231}
1232
1233int
1234ugenioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
1235{
1236	int endpt = UGENENDPOINT(dev);
1237	struct ugen_softc *sc;
1238	int error;
1239
1240	sc = ugen_cd.cd_devs[UGENUNIT(dev)];
1241
1242	sc->sc_refcnt++;
1243	error = ugen_do_ioctl(sc, endpt, cmd, addr, flag, p);
1244	if (--sc->sc_refcnt < 0)
1245		usb_detach_wakeup(&sc->sc_dev);
1246	return (error);
1247}
1248
1249void filt_ugenrdetach(struct knote *);
1250int filt_ugenread_intr(struct knote *, long);
1251int filt_ugenread_isoc(struct knote *, long);
1252int ugenkqfilter(dev_t, struct knote *);
1253
1254void
1255filt_ugenrdetach(struct knote *kn)
1256{
1257	struct ugen_endpoint *sce = (void *)kn->kn_hook;
1258	int s;
1259
1260	s = splusb();
1261	klist_remove_locked(&sce->rsel.si_note, kn);
1262	splx(s);
1263}
1264
1265int
1266filt_ugenread_intr(struct knote *kn, long hint)
1267{
1268	struct ugen_endpoint *sce = (void *)kn->kn_hook;
1269
1270	kn->kn_data = sce->q.c_cc;
1271	return (kn->kn_data > 0);
1272}
1273
1274int
1275filt_ugenread_isoc(struct knote *kn, long hint)
1276{
1277	struct ugen_endpoint *sce = (void *)kn->kn_hook;
1278
1279	if (sce->cur == sce->fill)
1280		return (0);
1281
1282	if (sce->cur < sce->fill)
1283		kn->kn_data = sce->fill - sce->cur;
1284	else
1285		kn->kn_data = (sce->limit - sce->cur) +
1286		    (sce->fill - sce->ibuf);
1287
1288	return (1);
1289}
1290
1291const struct filterops ugenread_intr_filtops = {
1292	.f_flags	= FILTEROP_ISFD,
1293	.f_attach	= NULL,
1294	.f_detach	= filt_ugenrdetach,
1295	.f_event	= filt_ugenread_intr,
1296};
1297
1298const struct filterops ugenread_isoc_filtops = {
1299	.f_flags	= FILTEROP_ISFD,
1300	.f_attach	= NULL,
1301	.f_detach	= filt_ugenrdetach,
1302	.f_event	= filt_ugenread_isoc,
1303};
1304
1305int
1306ugenkqfilter(dev_t dev, struct knote *kn)
1307{
1308	struct ugen_softc *sc;
1309	struct ugen_endpoint *sce;
1310	struct klist *klist;
1311	int s;
1312
1313	sc = ugen_cd.cd_devs[UGENUNIT(dev)];
1314
1315	if (usbd_is_dying(sc->sc_udev))
1316		return (ENXIO);
1317
1318	/* XXX always IN */
1319	sce = &sc->sc_endpoints[UGENENDPOINT(dev)][IN];
1320	if (sce == NULL)
1321		return (ENXIO);
1322
1323	switch (kn->kn_filter) {
1324	case EVFILT_READ:
1325		klist = &sce->rsel.si_note;
1326		switch (UE_GET_XFERTYPE(sce->edesc->bmAttributes)) {
1327		case UE_INTERRUPT:
1328			kn->kn_fop = &ugenread_intr_filtops;
1329			break;
1330		case UE_ISOCHRONOUS:
1331			kn->kn_fop = &ugenread_isoc_filtops;
1332			break;
1333		case UE_BULK:
1334			/*
1335			 * We have no easy way of determining if a read will
1336			 * yield any data or a write will happen.
1337			 */
1338			return (seltrue_kqfilter(dev, kn));
1339		default:
1340			return (EINVAL);
1341		}
1342		break;
1343
1344	case EVFILT_WRITE:
1345		klist = &sce->rsel.si_note;
1346		switch (UE_GET_XFERTYPE(sce->edesc->bmAttributes)) {
1347		case UE_INTERRUPT:
1348		case UE_ISOCHRONOUS:
1349			/* XXX poll doesn't support this */
1350			return (EINVAL);
1351
1352		case UE_BULK:
1353			/*
1354			 * We have no easy way of determining if a read will
1355			 * yield any data or a write will happen.
1356			 */
1357			return (seltrue_kqfilter(dev, kn));
1358		default:
1359			return (EINVAL);
1360		}
1361		break;
1362
1363	default:
1364		return (EINVAL);
1365	}
1366
1367	kn->kn_hook = (void *)sce;
1368
1369	s = splusb();
1370	klist_insert_locked(klist, kn);
1371	splx(s);
1372
1373	return (0);
1374}
1375
1376void
1377ugen_clear_iface_eps(struct ugen_softc *sc, struct usbd_interface *iface)
1378{
1379	usb_interface_descriptor_t *id;
1380	usb_endpoint_descriptor_t *ed;
1381	uint8_t xfertype;
1382	int i;
1383
1384	/* Only clear interface endpoints when none are in use. */
1385	for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
1386		if (i == USB_CONTROL_ENDPOINT)
1387			continue;
1388		if (sc->sc_is_open[i] != 0)
1389			return;
1390	}
1391	DPRINTFN(1,("%s: clear interface eps\n", __func__));
1392
1393	id = usbd_get_interface_descriptor(iface);
1394	if (id == NULL)
1395		goto bad;
1396
1397	for (i = 0; i < id->bNumEndpoints; i++) {
1398		ed = usbd_interface2endpoint_descriptor(iface, i);
1399		if (ed == NULL)
1400			goto bad;
1401
1402		xfertype = UE_GET_XFERTYPE(ed->bmAttributes);
1403		if (xfertype == UE_BULK || xfertype == UE_INTERRUPT) {
1404			if (usbd_clear_endpoint_feature(sc->sc_udev,
1405			    ed->bEndpointAddress, UF_ENDPOINT_HALT))
1406				goto bad;
1407		}
1408	}
1409	return;
1410bad:
1411	printf("%s: clear endpoints failed!\n", __func__);
1412}
1413