Add a generic USB driver. It allows easy access to descriptors, the

control pipe via ioctl() and read() and write() access to bulk and interrupt pipes.
1998-12-08 15:39:00 +00:00 · 1998-12-08 15:39:00 +00:00 · d26c277522
parent 4d19a06c27
commit d26c277522
1 changed files with 889 additions and 0 deletions
--- a/sys/dev/usb/ugen.c
+++ b/sys/dev/usb/ugen.c
@ -0,0 +1,889 @@
+/*	$NetBSD: ugen.c,v 1.1 1998/12/08 15:39:00 augustss Exp $	*/
+
+/*
+ * Copyright (c) 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Lennart Augustsson (augustss@carlstedt.se) at
+ * Carlstedt Research & Technology.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/device.h>
+#include <sys/ioctl.h>
+#include <sys/tty.h>
+#include <sys/file.h>
+#include <sys/select.h>
+#include <sys/proc.h>
+#include <sys/vnode.h>
+#include <sys/device.h>
+#include <sys/poll.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+#include <dev/usb/usbdi_util.h>
+
+#ifdef USB_DEBUG
+#define DPRINTF(x)	if (ugendebug) printf x
+#define DPRINTFN(n,x)	if (ugendebug>(n)) printf x
+int	ugendebug = 10;
+#else
+#define DPRINTF(x)
+#define DPRINTFN(n,x)
+#endif
+
+struct ugen_endpoint {
+	struct ugen_softc *sc;
+	usb_endpoint_descriptor_t *edesc;
+	usbd_interface_handle iface;
+	int state;
+#define UGEN_OPEN	0x01	/* device is open */
+#define	UGEN_ASLP	0x02	/* waiting for data */
+	usbd_pipe_handle pipeh;
+	struct clist q;
+	struct selinfo rsel;
+	void *ibuf;
+};
+
+#define	UGEN_CHUNK	128	/* chunk size for read */
+#define	UGEN_IBSIZE	1020	/* buffer size */
+#define	UGEN_BBSIZE	1024
+
+struct ugen_softc {
+	struct device sc_dev;		/* base device */
+	struct usbd_device *sc_udev;
+
+	struct ugen_endpoint sc_endpoints[USB_MAX_ENDPOINTS][2];
+#define OUT 0			/* index order is important, from UE_OUT */
+#define IN  1			/* from UE_IN */
+
+	int sc_disconnected;		/* device is gone */
+};
+
+int ugen_match __P((struct device *, struct cfdata *, void *));
+void ugen_attach __P((struct device *, struct device *, void *));
+
+int ugenopen __P((dev_t, int, int, struct proc *));
+int ugenclose __P((dev_t, int, int, struct proc *p));
+int ugenread __P((dev_t, struct uio *uio, int));
+int ugenwrite __P((dev_t, struct uio *uio, int));
+int ugenioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
+int ugenpoll __P((dev_t, int, struct proc *));
+void ugenintr __P((usbd_request_handle reqh, usbd_private_handle addr, usbd_status status));
+void ugen_disco __P((void *));
+
+int ugen_set_config __P((struct ugen_softc *sc, int configno));
+usb_config_descriptor_t *ugen_get_cdesc __P((struct ugen_softc *sc, int index, int *lenp));
+usbd_status ugen_set_interface __P((struct ugen_softc *, int, int));
+int ugen_get_alt_index __P((struct ugen_softc *sc, usb_config_descriptor_t *cdesc, int ifaceidx));
+
+#define UGENUNIT(n) (((n) >> 4) & 0xf)
+#define UGENENDPOINT(n) ((n) & 0xf)
+
+extern struct cfdriver ugen_cd;
+
+struct cfattach ugen_ca = {
+	sizeof(struct ugen_softc), ugen_match, ugen_attach
+};
+
+int
+ugen_match(parent, match, aux)
+	struct device *parent;
+	struct cfdata *match;
+	void *aux;
+{
+	struct usb_attach_arg *uaa = (struct usb_attach_arg *)aux;
+
+	if (uaa->usegeneric)
+		return (UMATCH_GENERIC);
+	else
+		return (UMATCH_NONE);
+}
+
+void
+ugen_attach(parent, self, aux)
+	struct device *parent;
+	struct device *self;
+	void *aux;
+{
+	struct ugen_softc *sc = (struct ugen_softc *)self;
+	struct usb_attach_arg *uaa = (struct usb_attach_arg *)aux;
+	char devinfo[1024];
+	usbd_status r;
+	
+	usbd_devinfo(uaa->device, 0, devinfo);
+	printf(": %s\n", devinfo);
+
+	sc->sc_udev = uaa->device;
+	r = ugen_set_config(sc, 1);
+	if (r != USBD_NORMAL_COMPLETION) {
+		printf("%s: setting configuration 0 failed\n", 
+		       sc->sc_dev.dv_xname);
+		sc->sc_disconnected = 1;
+		return;
+	}
+}
+
+int
+ugen_set_config(sc, configno)
+	struct ugen_softc *sc;
+	int configno;
+{
+	usbd_device_handle dev = sc->sc_udev;
+	usbd_interface_handle iface;
+	usb_endpoint_descriptor_t *ed;
+	struct ugen_endpoint *sce;
+	u_int8_t niface, nendpt;
+	int ifaceno, endptno, endpt;
+	usbd_status r;
+
+	DPRINTFN(1,("ugen_set_config: %s to configno %d, sc=%p\n",
+		    sc->sc_dev.dv_xname, configno, sc));
+	r = usbd_set_config_no(dev, configno, 0);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+
+	r = usbd_interface_count(dev, &niface);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	memset(sc->sc_endpoints, 0, sizeof sc->sc_endpoints);
+	for (ifaceno = 0; ifaceno < niface; ifaceno++) {
+		DPRINTFN(1,("ugen_set_config: ifaceno %d\n", ifaceno));
+		r = usbd_device2interface_handle(dev, ifaceno, &iface);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (r);
+		r = usbd_endpoint_count(iface, &nendpt);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (r);
+		for (endptno = 0; endptno < nendpt; endptno++) {
+			ed = usbd_interface2endpoint_descriptor(iface,endptno);
+			endpt = ed->bEndpointAddress;
+			sce = &sc->sc_endpoints[UE_GET_ADDR(endpt)]
+				               [UE_GET_IN(endpt)];
+			DPRINTFN(1,("ugen_set_config: endptno %d, endpt=0x%02x(%d,%d), sce=%p\n", 
+				    endptno, endpt, UE_GET_ADDR(endpt),
+				    UE_GET_IN(endpt), sce));
+			sce->sc = sc;
+			sce->edesc = ed;
+			sce->iface = iface;
+		}
+	}
+	return (USBD_NORMAL_COMPLETION);
+}
+
+void
+ugen_disco(p)
+	void *p;
+{
+	struct ugen_softc *sc = p;
+	sc->sc_disconnected = 1;
+}
+
+int
+ugenopen(dev, flag, mode, p)
+	dev_t dev;
+	int flag;
+	int mode;
+	struct proc *p;
+{
+	int unit = UGENUNIT(dev);
+	int endpt = UGENENDPOINT(dev);
+	usb_endpoint_descriptor_t *edesc;
+	struct ugen_softc *sc;
+	struct ugen_endpoint *sce;
+	int dir, isize;
+	usbd_status r;
+
+	DPRINTFN(5, ("ugenopen: flag=%d, unit=%d endpt=%d\n", 
+		     flag, unit, endpt));
+	if (unit >= ugen_cd.cd_ndevs)
+		return (ENXIO);
+	sc = ugen_cd.cd_devs[unit];
+	if (!sc)
+		return (ENXIO);
+
+	if (sc->sc_disconnected)
+		return (EIO);
+
+	if (endpt == USB_CONTROL_ENDPOINT) {
+		/*if ((flag & (FWRITE|FREAD)) != (FWRITE|FREAD))
+		  return (EACCES);*/
+		sce = &sc->sc_endpoints[USB_CONTROL_ENDPOINT][OUT];
+		if (sce->state & UGEN_OPEN)
+			return (EBUSY);
+	} else {
+		switch (flag & (FWRITE|FREAD)) {
+		case FWRITE:
+			dir = OUT;
+			break;
+		case FREAD:
+			dir = IN;
+			break;
+		default:
+			return (EACCES);
+		}
+		sce = &sc->sc_endpoints[endpt][dir];
+		DPRINTFN(5, ("ugenopen: sc=%p, endpt=%d, dir=%d, sce=%p\n", sc, endpt, dir, sce));
+		if (sce->state & UGEN_OPEN)
+			return (EBUSY);
+		edesc = sce->edesc;
+		if (!edesc)
+			return (ENXIO);
+		switch (edesc->bmAttributes & UE_XFERTYPE) {
+		case UE_INTERRUPT:
+			isize = UGETW(edesc->wMaxPacketSize);
+			if (isize == 0)	/* shouldn't happen */
+				return (EINVAL);
+			sce->ibuf = malloc(isize, M_USB, M_NOWAIT);
+			DPRINTFN(5, ("ugenopen: intr endpt=%d,isize=%d\n", 
+				     endpt, isize));
+			if (clalloc(&sce->q, UGEN_IBSIZE, 0) == -1)
+				return (ENOMEM);
+			r = usbd_open_pipe_intr(sce->iface, 
+				edesc->bEndpointAddress, 
+				USBD_SHORT_XFER_OK, &sce->pipeh, sce, 
+				sce->ibuf, isize, ugenintr);
+			if (r != USBD_NORMAL_COMPLETION) {
+				free(sce->ibuf, M_USB);
+				clfree(&sce->q);
+				return (EIO);
+			}
+			usbd_set_disco(sce->pipeh, ugen_disco, sc);
+			DPRINTFN(5, ("ugenopen: interrupt open done\n"));
+			break;
+		case UE_BULK:
+			r = usbd_open_pipe(sce->iface, 
+					   edesc->bEndpointAddress, 0, 
+					   &sce->pipeh);
+			if (r != USBD_NORMAL_COMPLETION)
+				return (EIO);
+			break;
+		case UE_CONTROL:
+		case UE_ISOCHRONOUS:
+			return (EINVAL);
+		}
+	}
+	sce->state |= UGEN_OPEN;
+	return (0);
+}
+
+int
+ugenclose(dev, flag, mode, p)
+	dev_t dev;
+	int flag;
+	int mode;
+	struct proc *p;
+{
+	struct ugen_softc *sc = ugen_cd.cd_devs[UGENUNIT(dev)];
+	int endpt = UGENENDPOINT(dev);
+	struct ugen_endpoint *sce;
+	int dir;
+
+	DPRINTFN(5, ("ugenclose\n"));
+	if (sc->sc_disconnected)
+		return (EIO);
+
+	if (endpt == USB_CONTROL_ENDPOINT) {
+		sc->sc_endpoints[endpt][OUT].state &= ~UGEN_OPEN;
+		return (0);
+	}
+	dir = flag & FWRITE ? OUT : IN;
+	sce = &sc->sc_endpoints[endpt][dir];
+	sce->state &= ~UGEN_OPEN;
+
+	usbd_abort_pipe(sce->pipeh);
+	usbd_close_pipe(sce->pipeh);
+
+	if (sce->ibuf) {
+		free(sce->ibuf, M_USB);
+		sce->ibuf = 0;
+	}
+
+	return (0);
+}
+
+int
+ugenread(dev, uio, flag)
+	dev_t dev;
+	struct uio *uio;
+	int flag;
+{
+	struct ugen_softc *sc = ugen_cd.cd_devs[UGENUNIT(dev)];
+	int endpt = UGENENDPOINT(dev);
+	struct ugen_endpoint *sce = &sc->sc_endpoints[endpt][IN];
+	size_t n;
+	char buf[UGEN_BBSIZE];
+	usbd_request_handle reqh;
+	usbd_status r;
+	int s;
+	int error = 0;
+	u_char buffer[UGEN_CHUNK];
+
+	DPRINTFN(5, ("ugenread: %d:%d\n", UGENUNIT(dev), UGENENDPOINT(dev)));
+	if (sc->sc_disconnected)
+		return (EIO);
+
+#ifdef DIAGNOSTIC
+	if (!sce->edesc) {
+		printf("ugenread: no edesc\n");
+		return (EIO);
+	}
+#endif
+
+	switch (sce->edesc->bmAttributes & UE_XFERTYPE) {
+	case UE_INTERRUPT:
+		/* Block until activity occured. */
+		s = spltty();
+		while (sce->q.c_cc == 0) {
+			if (flag & IO_NDELAY) {
+				splx(s);
+				return EWOULDBLOCK;
+			}
+			sce->state |= UGEN_ASLP;
+			DPRINTFN(5, ("ugenread: sleep on %p\n", sc));
+			error = tsleep((caddr_t)sce, PZERO | PCATCH, 
+				       "ugenrea", 0);
+			DPRINTFN(5, ("ugenread: woke, error=%d\n", error));
+			if (error) {
+				sce->state &= ~UGEN_ASLP;
+				splx(s);
+				return (error);
+			}
+		}
+		splx(s);
+
+		/* Transfer as many chunks as possible. */
+		while (sce->q.c_cc > 0 && uio->uio_resid > 0) {
+			n = min(sce->q.c_cc, uio->uio_resid);
+			if (n > sizeof(buffer))
+				n = sizeof(buffer);
+
+			/* Remove a small chunk from the input queue. */
+			q_to_b(&sce->q, buffer, n);
+			DPRINTFN(5, ("ugenread: got %d chars\n", n));
+
+			/* Copy the data to the user process. */
+			error = uiomove(buffer, n, uio);
+			if (error)
+				break;
+		}
+		break;
+	case UE_BULK:
+		reqh = usbd_alloc_request();
+		if (reqh == 0)
+			return (ENOMEM);
+		while ((n = min(UGEN_BBSIZE, uio->uio_resid)) != 0) {
+			/* XXX use callback to enable interrupt? */
+			r = usbd_setup_request(reqh, sce->pipeh, 0, buf, n,
+					       0, USBD_NO_TIMEOUT, 0);
+			if (r != USBD_NORMAL_COMPLETION) {
+				error = EIO;
+				break;
+			}
+			DPRINTFN(1, ("ugenread: transfer %d bytes\n", n));
+			r = usbd_sync_transfer(reqh);
+			if (r != USBD_NORMAL_COMPLETION) {
+				DPRINTF(("ugenread: error=%d\n", r));
+				usbd_clear_endpoint_stall(sce->pipeh);
+				error = EIO;
+				break;
+			}
+			error = uiomove(buf, n, uio);
+			if (error)
+				break;
+		}
+		usbd_free_request(reqh);
+		break;
+	default:
+		return (ENXIO);
+	}
+
+	return (error);
+}
+
+int
+ugenwrite(dev, uio, flag)
+	dev_t dev;
+	struct uio *uio;
+	int flag;
+{
+	struct ugen_softc *sc = ugen_cd.cd_devs[UGENUNIT(dev)];
+	int endpt = UGENENDPOINT(dev);
+	struct ugen_endpoint *sce = &sc->sc_endpoints[endpt][IN];
+	size_t n;
+	int error = 0;
+	char buf[UGEN_BBSIZE];
+	usbd_request_handle reqh;
+	usbd_status r;
+
+	if (sc->sc_disconnected)
+		return (EIO);
+
+#ifdef DIAGNOSTIC
+	if (!sce->edesc) {
+		printf("ugenwrite: no edesc\n");
+		return (EIO);
+	}
+#endif
+
+	DPRINTF(("ugenwrite\n"));
+	switch (sce->edesc->bmAttributes & UE_XFERTYPE) {
+	case UE_BULK:
+		reqh = usbd_alloc_request();
+		if (reqh == 0)
+			return (EIO);
+		while ((n = min(UGEN_BBSIZE, uio->uio_resid)) != 0) {
+			error = uiomove(buf, n, uio);
+			if (error)
+				break;
+			/* XXX use callback to enable interrupt? */
+			r = usbd_setup_request(reqh, sce->pipeh, 0, buf, n,
+					       0, USBD_NO_TIMEOUT, 0);
+			if (r != USBD_NORMAL_COMPLETION) {
+				error = EIO;
+				break;
+			}
+			DPRINTFN(1, ("ugenwrite: transfer %d bytes\n", n));
+			r = usbd_sync_transfer(reqh);
+			if (r != USBD_NORMAL_COMPLETION) {
+				DPRINTF(("ugenwrite: error=%d\n", r));
+				usbd_clear_endpoint_stall(sce->pipeh);
+				error = EIO;
+				break;
+			}
+		}
+		usbd_free_request(reqh);
+		break;
+	default:
+		return (ENXIO);
+	}
+	return (error);
+}
+
+
+void
+ugenintr(reqh, addr, status)
+	usbd_request_handle reqh;
+	usbd_private_handle addr;
+	usbd_status status;
+{
+	struct ugen_endpoint *sce = addr;
+	/*struct ugen_softc *sc = sce->sc;*/
+	u_char *ibuf;
+	int isize;
+
+	if (status == USBD_CANCELLED)
+		return;
+
+	if (status != USBD_NORMAL_COMPLETION) {
+		DPRINTF(("ugenintr: status=%d\n", status));
+		usbd_clear_endpoint_stall_async(sce->pipeh);
+		return;
+	}
+
+	ibuf = sce->ibuf;
+	isize = UGETW(sce->edesc->wMaxPacketSize);
+
+	/*DPRINTFN(5, ("ugenintr: addr=%d endpt=%d\n", 
+		     addr, endpt, isize));
+	DPRINTFN(5, ("          data = %02x %02x %02x\n",
+	ibuf[0], ibuf[1], ibuf[2]));*/
+
+	(void)b_to_q(ibuf, isize, &sce->q);
+		
+	if (sce->state & UGEN_ASLP) {
+		sce->state &= ~UGEN_ASLP;
+		DPRINTFN(5, ("ugen_intr: waking %p\n", sce));
+		wakeup((caddr_t)sce);
+	}
+	selwakeup(&sce->rsel);
+}
+
+usbd_status
+ugen_set_interface(sc, ifaceidx, altno)
+	struct ugen_softc *sc;
+	int ifaceidx, altno;
+{
+	usbd_interface_handle iface;
+	usb_endpoint_descriptor_t *ed;
+	usbd_status r;
+	struct ugen_endpoint *sce;
+	u_int8_t niface, nendpt, endptno, endpt;
+
+	DPRINTFN(15, ("ugen_set_interface %d %d\n", ifaceidx, altno));
+
+	r = usbd_interface_count(sc->sc_udev, &niface);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	if (ifaceidx < 0 || ifaceidx >= niface)
+		return (USBD_INVAL);
+	
+	r = usbd_device2interface_handle(sc->sc_udev, ifaceidx, &iface);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	r = usbd_endpoint_count(iface, &nendpt);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	for (endptno = 0; endptno < nendpt; endptno++) {
+		ed = usbd_interface2endpoint_descriptor(iface,endptno);
+		endpt = ed->bEndpointAddress;
+		sce = &sc->sc_endpoints[UE_GET_ADDR(endpt)][UE_GET_IN(endpt)];
+		sce->sc = 0;
+		sce->edesc = 0;
+		sce->iface = 0;
+	}
+
+	/* change setting */
+	r = usbd_set_interface(iface, altno);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+
+	r = usbd_endpoint_count(iface, &nendpt);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	for (endptno = 0; endptno < nendpt; endptno++) {
+		ed = usbd_interface2endpoint_descriptor(iface,endptno);
+		endpt = ed->bEndpointAddress;
+		sce = &sc->sc_endpoints[UE_GET_ADDR(endpt)][UE_GET_IN(endpt)];
+		sce->sc = sc;
+		sce->edesc = ed;
+		sce->iface = iface;
+	}
+	return (0);
+}
+
+/* Retrieve a complete descriptor for a certain device and index. */
+usb_config_descriptor_t *
+ugen_get_cdesc(sc, index, lenp)
+	struct ugen_softc *sc;
+	int index;
+	int *lenp;
+{
+	usb_config_descriptor_t *cdesc, *tdesc, cdescr;
+	int len;
+	usbd_status r;
+
+	if (index == USB_CURRENT_CONFIG_INDEX) {
+		tdesc = usbd_get_config_descriptor(sc->sc_udev);
+		len = UGETW(tdesc->wTotalLength);
+		if (lenp)
+			*lenp = len;
+		cdesc = malloc(len, M_TEMP, M_WAITOK);
+		memcpy(cdesc, tdesc, len);
+		DPRINTFN(5,("ugen_get_cdesc: current, len=%d\n", len));
+	} else {
+		r = usbd_get_config_desc(sc->sc_udev, index, &cdescr);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (0);
+		len = UGETW(cdescr.wTotalLength);
+		DPRINTFN(5,("ugen_get_cdesc: index=%d, len=%d\n", index, len));
+		if (lenp)
+			*lenp = len;
+		cdesc = malloc(len, M_TEMP, M_WAITOK);
+		r = usbd_get_config_desc_full(sc->sc_udev, index, cdesc, len);
+		if (r != USBD_NORMAL_COMPLETION) {
+			free(cdesc, M_TEMP);
+			return (0);
+		}
+	}
+	return (cdesc);
+}
+
+int
+ugen_get_alt_index(sc, cdesc, ifaceidx)
+	struct ugen_softc *sc;
+	usb_config_descriptor_t *cdesc;
+	int ifaceidx;
+{
+	u_int8_t alt;
+	usbd_interface_handle iface;
+	usb_interface_descriptor_t *idesc;
+	int altidx, nalt;
+	usbd_status r;
+
+	cdesc = usbd_get_config_descriptor(sc->sc_udev);
+	r = usbd_device2interface_handle(sc->sc_udev, ifaceidx, &iface);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (-1);
+	r = usbd_get_interface(iface, &alt);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (-1);
+	nalt = usbd_get_no_alt(iface);
+	for (altidx = 0; altidx < nalt; altidx++) {
+		idesc = usbd_find_idesc(cdesc, ifaceidx, altidx);
+		if (!idesc) {
+			DPRINTF(("ugen_get_alt_index: ifaceidx=%d altidx=%d failed\n", ifaceidx, altidx));
+			return (-1);
+		}
+		DPRINTF(("ugen_get_alt_index: ifaceidx=%d altidx=%d alt=%d(%d)\n", ifaceidx, altidx, idesc->bAlternateSetting, alt));
+		if (idesc->bAlternateSetting == alt)
+			return (altidx);
+	}
+	return (-1);
+}
+
+int
+ugenioctl(dev, cmd, addr, flag, p)
+	dev_t dev;
+	u_long cmd;
+	caddr_t addr; 
+	int flag;
+	struct proc *p;
+{
+	struct ugen_softc *sc = ugen_cd.cd_devs[UGENUNIT(dev)];
+	int endpt = UGENENDPOINT(dev);
+	usbd_status r;
+	usbd_interface_handle iface;
+	struct usb_config_desc *cd;
+	usb_config_descriptor_t *cdesc;
+	struct usb_interface_desc *id;
+	usb_interface_descriptor_t *idesc;
+	struct usb_endpoint_desc *ed;
+	usb_endpoint_descriptor_t *edesc;
+	struct usb_alt_interface *ai;
+	u_int8_t conf, alt;
+
+	DPRINTFN(5, ("ugenioctl: cmd=%08lx\n", cmd));
+	if (sc->sc_disconnected)
+		return (EIO);
+
+	if (endpt != USB_CONTROL_ENDPOINT)
+		return (EINVAL);
+
+	switch (cmd) {
+	case USB_GET_CONFIG:
+		r = usbd_get_config(sc->sc_udev, &conf);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (EIO);
+		*(int *)addr = conf;
+		break;
+	case USB_SET_CONFIG:
+		r = usbd_set_config_no(sc->sc_udev, *(int *)addr, 0);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (EIO);
+		break;
+	case USB_GET_ALTINTERFACE:
+		ai = (struct usb_alt_interface *)addr;
+		r = usbd_device2interface_handle(sc->sc_udev, 
+						 ai->interface_index, &iface);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (EINVAL);
+		idesc = usbd_get_interface_descriptor(iface);
+		ai->alt_no = idesc->bAlternateSetting;
+		break;
+	case USB_SET_ALTINTERFACE:
+		ai = (struct usb_alt_interface *)addr;
+		r = usbd_device2interface_handle(sc->sc_udev, 
+						 ai->interface_index, &iface);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (EINVAL);
+		r = ugen_set_interface(sc, ai->interface_index, ai->alt_no);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (EINVAL);
+		break;
+	case USB_GET_NO_ALT:
+		ai = (struct usb_alt_interface *)addr;
+		r = usbd_device2interface_handle(sc->sc_udev, 
+						 ai->interface_index, &iface);
+		if (r != USBD_NORMAL_COMPLETION)
+			return (EINVAL);
+		ai->alt_no = usbd_get_no_alt(iface);
+		break;
+	case USB_GET_DEVICE_DESC:
+		*(usb_device_descriptor_t *)addr =
+			*usbd_get_device_descriptor(sc->sc_udev);
+		break;
+	case USB_GET_CONFIG_DESC:
+		cd = (struct usb_config_desc *)addr;
+		cdesc = ugen_get_cdesc(sc, cd->config_index, 0);
+		if (!cdesc)
+			return (EINVAL);
+		cd->desc = *cdesc;
+		free(cdesc, M_TEMP);
+		break;
+	case USB_GET_INTERFACE_DESC:
+		id = (struct usb_interface_desc *)addr;
+		cdesc = ugen_get_cdesc(sc, id->config_index, 0);
+		if (!cdesc)
+			return (EINVAL);
+		if (id->config_index == USB_CURRENT_CONFIG_INDEX &&
+		    id->alt_index == USB_CURRENT_ALT_INDEX)
+			alt = ugen_get_alt_index(sc, cdesc, id->interface_index);
+		else
+			alt = id->alt_index;
+		idesc = usbd_find_idesc(cdesc, id->interface_index, alt);
+		if (!idesc) {
+			free(cdesc, M_TEMP);
+			return (EINVAL);
+		}
+		id->desc = *idesc;
+		free(cdesc, M_TEMP);
+		break;
+	case USB_GET_ENDPOINT_DESC:
+		ed = (struct usb_endpoint_desc *)addr;
+		cdesc = ugen_get_cdesc(sc, ed->config_index, 0);
+		if (!cdesc)
+			return (EINVAL);
+		if (ed->config_index == USB_CURRENT_CONFIG_INDEX &&
+		    ed->alt_index == USB_CURRENT_ALT_INDEX)
+			alt = ugen_get_alt_index(sc, cdesc, ed->interface_index);
+		else
+			alt = ed->alt_index;
+		edesc = usbd_find_edesc(cdesc, ed->interface_index, 
+					alt, ed->endpoint_index);
+		if (!edesc) {
+			free(cdesc, M_TEMP);
+			return (EINVAL);
+		}
+		ed->desc = *edesc;
+		free(cdesc, M_TEMP);
+		break;
+	case USB_GET_FULL_DESC:
+	{
+		int len;
+		struct iovec iov;
+		struct uio uio;
+		struct usb_full_desc *fd = (struct usb_full_desc *)addr;
+		int error;
+
+		cdesc = ugen_get_cdesc(sc, fd->config_index, &len);
+		if (len > fd->size)
+			len = fd->size;
+		iov.iov_base = (caddr_t)fd->data;
+		iov.iov_len = len;
+		uio.uio_iov = &iov;
+		uio.uio_iovcnt = 1;
+		uio.uio_resid = len;
+		uio.uio_offset = 0;
+		uio.uio_segflg = UIO_USERSPACE;
+		uio.uio_rw = UIO_READ;
+		uio.uio_procp = p;
+		error = uiomove(cdesc, len, &uio);
+		free(cdesc, M_TEMP);
+		return (error);
+	}
+	case USB_DO_REQUEST:
+	{
+		struct usb_ctl_request *ur = (void *)addr;
+		int len = UGETW(ur->request.wLength);
+		struct iovec iov;
+		struct uio uio;
+		void *ptr = 0;
+		usbd_status r;
+		int error = 0;
+
+		/* Avoid requests that would damage the bus integrity. */
+		if ((ur->request.bmRequestType == UT_WRITE_DEVICE &&
+		     ur->request.bRequest == UR_SET_ADDRESS) ||
+		    (ur->request.bmRequestType == UT_WRITE_DEVICE &&
+		     ur->request.bRequest == UR_SET_CONFIG) ||
+		    (ur->request.bmRequestType == UT_WRITE_INTERFACE &&
+		     ur->request.bRequest == UR_SET_INTERFACE))
+			return (EINVAL);
+
+		if (len < 0 || len > 32767)
+			return (EINVAL);
+		if (len != 0) {
+			iov.iov_base = (caddr_t)ur->data;
+			iov.iov_len = len;
+			uio.uio_iov = &iov;
+			uio.uio_iovcnt = 1;
+			uio.uio_resid = len;
+			uio.uio_offset = 0;
+			uio.uio_segflg = UIO_USERSPACE;
+			uio.uio_rw =
+				ur->request.bmRequestType & UT_READ ? 
+				UIO_READ : UIO_WRITE;
+			uio.uio_procp = p;
+			ptr = malloc(len, M_TEMP, M_WAITOK);
+			if (uio.uio_rw == UIO_WRITE) {
+				error = uiomove(ptr, len, &uio);
+				if (error)
+					goto ret;
+			}
+		}
+		r = usbd_do_request(sc->sc_udev, &ur->request, ptr);
+		if (r) {
+			error = EIO;
+			goto ret;
+		}
+		if (len != 0) {
+			if (uio.uio_rw == UIO_READ) {
+				error = uiomove(ptr, len, &uio);
+				if (error)
+					goto ret;
+			}
+		}
+	ret:
+		if (ptr)
+			free(ptr, M_TEMP);
+		return (error);
+	}
+	default:
+		return (EINVAL);
+	}
+	return (0);
+}
+
+int
+ugenpoll(dev, events, p)
+	dev_t dev;
+	int events;
+	struct proc *p;
+{
+	struct ugen_softc *sc = ugen_cd.cd_devs[UGENUNIT(dev)];
+	/* XXX */
+	struct ugen_endpoint *sce = &sc->sc_endpoints[UGENENDPOINT(dev)][IN];
+	int revents = 0;
+	int s;
+
+	if (sc->sc_disconnected)
+		return (EIO);
+
+	s = spltty();
+	switch (0 /*XXXsce->sc_pipekind*/) {
+	case UE_INTERRUPT:
+		if (events & (POLLIN | POLLRDNORM)) {
+			if (sce->q.c_cc > 0)
+				revents |= events & (POLLIN | POLLRDNORM);
+			else
+				selrecord(p, &sce->rsel);
+		}
+		break;
+	}
+	splx(s);
+	return (revents);
+}