From NetBSD; USB support.

1 files changed, 2744 insertions, 0 deletions

diff --git a/sys/dev/usb/uhci.c b/sys/dev/usb/uhci.c
new file mode 100644
index 00000000000..96400f513c0
--- /dev/null
+++ b/sys/dev/usb/uhci.c
@@ -0,0 +1,2744 @@
+/*	$OpenBSD: uhci.c,v 1.1 1999/08/13 05:28:04 fgsch Exp $	*/
+/*	$NetBSD: uhci.c,v 1.34 1999/08/02 23:35:55 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.
+ */
+
+/*
+ * USB Universal Host Controller driver.
+ * Handles e.g. PIIX3 and PIIX4.
+ *
+ * Data sheets: ftp://download.intel.com/design/intarch/datashts/29055002.pdf
+ *              ftp://download.intel.com/design/intarch/datashts/29056201.pdf
+ * UHCI spec: http://www.intel.com/design/usb/uhci11d.pdf
+ * USB spec: http://www.usb.org/developers/data/usb11.pdf
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#if defined(__NetBSD__) || defined(__OpenBSD__)
+#include <sys/device.h>
+#elif defined(__FreeBSD__)
+#include <sys/module.h>
+#include <sys/bus.h>
+#endif
+#include <sys/proc.h>
+#include <sys/queue.h>
+#include <sys/select.h>
+
+#include <machine/bus.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+#include <dev/usb/usbdivar.h>
+#include <dev/usb/usb_mem.h>
+#include <dev/usb/usb_quirks.h>
+
+#include <dev/usb/uhcireg.h>
+#include <dev/usb/uhcivar.h>
+
+#if defined(__FreeBSD__)
+#include <machine/clock.h>
+
+#define delay(d)		DELAY(d)
+#endif
+
+#define MS_TO_TICKS(ms) ((ms) * hz / 1000)
+
+#if defined(__OpenBSD__)
+struct cfdriver uhci_cd = {
+	NULL, "uhci", DV_DULL
+};
+#endif
+
+struct uhci_pipe {
+	struct usbd_pipe pipe;
+	uhci_intr_info_t *iinfo;
+	int nexttoggle;
+	/* Info needed for different pipe kinds. */
+	union {
+		/* Control pipe */
+		struct {
+			uhci_soft_qh_t *sqh;
+			usb_dma_t reqdma;
+			usb_dma_t datadma;
+			uhci_soft_td_t *setup, *stat;
+			u_int length;
+		} ctl;
+		/* Interrupt pipe */
+		struct {
+			usb_dma_t datadma;
+			int npoll;
+			uhci_soft_qh_t **qhs;
+		} intr;
+		/* Bulk pipe */
+		struct {
+			uhci_soft_qh_t *sqh;
+			usb_dma_t datadma;
+			u_int length;
+			int isread;
+		} bulk;
+		/* Iso pipe */
+		struct iso {
+			u_int bufsize;
+			u_int nbuf;
+			usb_dma_t *bufs;
+			uhci_soft_td_t **stds;
+		} iso;
+	} u;
+};
+
+/* 
+ * The uhci_intr_info free list can be global since they contain
+ * no dma specific data.  The other free lists do.
+ */
+LIST_HEAD(, uhci_intr_info) uhci_ii_free;
+
+void		uhci_busreset __P((uhci_softc_t *));
+void		uhci_power __P((int, void *));
+usbd_status	uhci_run __P((uhci_softc_t *, int run));
+uhci_soft_td_t *uhci_alloc_std __P((uhci_softc_t *));
+void		uhci_free_std __P((uhci_softc_t *, uhci_soft_td_t *));
+uhci_soft_qh_t *uhci_alloc_sqh __P((uhci_softc_t *));
+void		uhci_free_sqh __P((uhci_softc_t *, uhci_soft_qh_t *));
+uhci_intr_info_t *uhci_alloc_intr_info __P((uhci_softc_t *));
+void		uhci_free_intr_info __P((uhci_intr_info_t *ii));
+#if 0
+void		uhci_enter_ctl_q __P((uhci_softc_t *, uhci_soft_qh_t *,
+				      uhci_intr_info_t *));
+void		uhci_exit_ctl_q __P((uhci_softc_t *, uhci_soft_qh_t *));
+#endif
+
+void		uhci_free_std_chain __P((uhci_softc_t *, 
+					 uhci_soft_td_t *, uhci_soft_td_t *));
+usbd_status	uhci_alloc_std_chain __P((struct uhci_pipe *, uhci_softc_t *,
+					  int, int, int, usb_dma_t *, 
+					  uhci_soft_td_t **,
+					  uhci_soft_td_t **));
+void		uhci_timo __P((void *));
+void		uhci_waitintr __P((uhci_softc_t *, usbd_request_handle));
+void		uhci_check_intr __P((uhci_softc_t *, uhci_intr_info_t *));
+void		uhci_ii_done __P((uhci_intr_info_t *));
+void		uhci_ii_finish __P((uhci_intr_info_t *));
+void		uhci_abort_req __P((usbd_request_handle, usbd_status status));
+void		uhci_timeout __P((void *));
+void		uhci_wakeup_ctrl __P((void *, int, int, void *, int));
+void		uhci_lock_frames __P((uhci_softc_t *));
+void		uhci_unlock_frames __P((uhci_softc_t *));
+void		uhci_add_ctrl __P((uhci_softc_t *, uhci_soft_qh_t *));
+void		uhci_add_bulk __P((uhci_softc_t *, uhci_soft_qh_t *));
+void		uhci_remove_ctrl __P((uhci_softc_t *, uhci_soft_qh_t *));
+void		uhci_remove_bulk __P((uhci_softc_t *, uhci_soft_qh_t *));
+int		uhci_str __P((usb_string_descriptor_t *, int, char *));
+
+void		uhci_wakeup_cb __P((usbd_request_handle reqh));
+
+usbd_status	uhci_device_ctrl_transfer __P((usbd_request_handle));
+usbd_status	uhci_device_ctrl_start __P((usbd_request_handle));
+void		uhci_device_ctrl_abort __P((usbd_request_handle));
+void		uhci_device_ctrl_close __P((usbd_pipe_handle));
+usbd_status	uhci_device_intr_transfer __P((usbd_request_handle));
+usbd_status	uhci_device_intr_start __P((usbd_request_handle));
+void		uhci_device_intr_abort __P((usbd_request_handle));
+void		uhci_device_intr_close __P((usbd_pipe_handle));
+usbd_status	uhci_device_bulk_transfer __P((usbd_request_handle));
+usbd_status	uhci_device_bulk_start __P((usbd_request_handle));
+void		uhci_device_bulk_abort __P((usbd_request_handle));
+void		uhci_device_bulk_close __P((usbd_pipe_handle));
+usbd_status	uhci_device_isoc_transfer __P((usbd_request_handle));
+usbd_status	uhci_device_isoc_start __P((usbd_request_handle));
+void		uhci_device_isoc_abort __P((usbd_request_handle));
+void		uhci_device_isoc_close __P((usbd_pipe_handle));
+usbd_status	uhci_device_isoc_setbuf __P((usbd_pipe_handle, u_int, u_int));
+
+usbd_status	uhci_root_ctrl_transfer __P((usbd_request_handle));
+usbd_status	uhci_root_ctrl_start __P((usbd_request_handle));
+void		uhci_root_ctrl_abort __P((usbd_request_handle));
+void		uhci_root_ctrl_close __P((usbd_pipe_handle));
+usbd_status	uhci_root_intr_transfer __P((usbd_request_handle));
+usbd_status	uhci_root_intr_start __P((usbd_request_handle));
+void		uhci_root_intr_abort __P((usbd_request_handle));
+void		uhci_root_intr_close __P((usbd_pipe_handle));
+
+usbd_status	uhci_open __P((usbd_pipe_handle));
+void		uhci_poll __P((struct usbd_bus *));
+
+usbd_status	uhci_device_request __P((usbd_request_handle reqh));
+void		uhci_ctrl_done __P((uhci_intr_info_t *ii));
+void		uhci_bulk_done __P((uhci_intr_info_t *ii));
+
+void		uhci_add_intr __P((uhci_softc_t *, int, uhci_soft_qh_t *));
+void		uhci_remove_intr __P((uhci_softc_t *, int, uhci_soft_qh_t *));
+usbd_status	uhci_device_setintr __P((uhci_softc_t *sc, 
+					 struct uhci_pipe *pipe, int ival));
+void		uhci_intr_done __P((uhci_intr_info_t *ii));
+void		uhci_isoc_done __P((uhci_intr_info_t *ii));
+
+#ifdef USB_DEBUG
+static void	uhci_dumpregs __P((uhci_softc_t *));
+void		uhci_dump_tds __P((uhci_soft_td_t *));
+void		uhci_dump_qh __P((uhci_soft_qh_t *));
+void		uhci_dump __P((void));
+void		uhci_dump_td __P((uhci_soft_td_t *));
+#endif
+
+#if defined(__NetBSD__) || defined(__OpenBSD__)
+#define UWRITE2(sc, r, x) bus_space_write_2((sc)->iot, (sc)->ioh, (r), (x))
+#define UWRITE4(sc, r, x) bus_space_write_4((sc)->iot, (sc)->ioh, (r), (x))
+#define UREAD2(sc, r) bus_space_read_2((sc)->iot, (sc)->ioh, (r))
+#define UREAD4(sc, r) bus_space_read_4((sc)->iot, (sc)->ioh, (r))
+#elif defined(__FreeBSD__)
+#define UWRITE2(sc,r,x)	outw((sc)->sc_iobase + (r), (x))
+#define UWRITE4(sc,r,x)	outl((sc)->sc_iobase + (r), (x))
+#define UREAD2(sc,r)	inw((sc)->sc_iobase + (r))
+#define UREAD4(sc,r)	inl((sc)->sc_iobase + (r))
+#endif
+
+#define UHCICMD(sc, cmd) UWRITE2(sc, UHCI_CMD, cmd)
+#define UHCISTS(sc) UREAD2(sc, UHCI_STS)
+
+#define UHCI_RESET_TIMEOUT 100	/* reset timeout */
+
+#define UHCI_CURFRAME(sc) (UREAD2(sc, UHCI_FRNUM) & UHCI_FRNUM_MASK)
+
+#define UHCI_INTR_ENDPT 1
+
+struct usbd_methods uhci_root_ctrl_methods = {	
+	uhci_root_ctrl_transfer,
+	uhci_root_ctrl_start,
+	uhci_root_ctrl_abort,
+	uhci_root_ctrl_close,
+	0,
+};
+
+struct usbd_methods uhci_root_intr_methods = {	
+	uhci_root_intr_transfer,
+	uhci_root_intr_start,
+	uhci_root_intr_abort,
+	uhci_root_intr_close,
+	0,
+};
+
+struct usbd_methods uhci_device_ctrl_methods = {
+	uhci_device_ctrl_transfer,
+	uhci_device_ctrl_start,
+	uhci_device_ctrl_abort,
+	uhci_device_ctrl_close,
+	0,
+};
+
+struct usbd_methods uhci_device_intr_methods = {
+	uhci_device_intr_transfer,
+	uhci_device_intr_start,
+	uhci_device_intr_abort,
+	uhci_device_intr_close,
+	0,
+};
+
+struct usbd_methods uhci_device_bulk_methods = {
+	uhci_device_bulk_transfer,
+	uhci_device_bulk_start,
+	uhci_device_bulk_abort,
+	uhci_device_bulk_close,
+	0,
+};
+
+struct usbd_methods uhci_device_isoc_methods = {
+	uhci_device_isoc_transfer,
+	uhci_device_isoc_start,
+	uhci_device_isoc_abort,
+	uhci_device_isoc_close,
+	uhci_device_isoc_setbuf,
+};
+
+void
+uhci_busreset(sc)
+	uhci_softc_t *sc;
+{
+	UHCICMD(sc, UHCI_CMD_GRESET);	/* global reset */
+	usb_delay_ms(&sc->sc_bus, USB_BUS_RESET_DELAY); /* wait a little */
+	UHCICMD(sc, 0);			/* do nothing */
+}
+
+usbd_status
+uhci_init(sc)
+	uhci_softc_t *sc;
+{
+	usbd_status r;
+	int i, j;
+	uhci_soft_qh_t *csqh, *bsqh, *sqh;
+	uhci_soft_td_t *std;
+
+	DPRINTFN(1,("uhci_init: start\n"));
+
+#if defined(USB_DEBUG)
+	if (uhcidebug > 2)
+		uhci_dumpregs(sc);
+#endif
+
+	uhci_run(sc, 0);			/* stop the controller */
+	UWRITE2(sc, UHCI_INTR, 0);		/* disable interrupts */
+
+	uhci_busreset(sc);
+
+	/* Allocate and initialize real frame array. */
+	r = usb_allocmem(sc->sc_dmatag, 
+			 UHCI_FRAMELIST_COUNT * sizeof(uhci_physaddr_t),
+			 UHCI_FRAMELIST_ALIGN, &sc->sc_dma);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	sc->sc_pframes = KERNADDR(&sc->sc_dma);
+	UWRITE2(sc, UHCI_FRNUM, 0);		/* set frame number to 0 */
+	UWRITE4(sc, UHCI_FLBASEADDR, DMAADDR(&sc->sc_dma)); /* set frame list */
+
+	/* Allocate the dummy QH where bulk traffic will be queued. */
+	bsqh = uhci_alloc_sqh(sc);
+	if (!bsqh)
+		return (USBD_NOMEM);
+	bsqh->qh->qh_hlink = UHCI_PTR_T;	/* end of QH chain */
+	bsqh->qh->qh_elink = UHCI_PTR_T;
+	sc->sc_bulk_start = sc->sc_bulk_end = bsqh;
+
+	/* Allocate the dummy QH where control traffic will be queued. */
+	csqh = uhci_alloc_sqh(sc);
+	if (!csqh)
+		return (USBD_NOMEM);
+	csqh->qh->hlink = bsqh;
+	csqh->qh->qh_hlink = bsqh->physaddr | UHCI_PTR_Q;
+	csqh->qh->qh_elink = UHCI_PTR_T;
+	sc->sc_ctl_start = sc->sc_ctl_end = csqh;
+
+	/* 
+	 * Make all (virtual) frame list pointers point to the interrupt
+	 * queue heads and the interrupt queue heads at the control
+	 * queue head and point the physical frame list to the virtual.
+	 */
+	for(i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
+		std = uhci_alloc_std(sc);
+		sqh = uhci_alloc_sqh(sc);
+		if (!std || !sqh)
+			return (USBD_NOMEM);
+		std->td->link.sqh = sqh;
+		std->td->td_link = sqh->physaddr | UHCI_PTR_Q;
+		std->td->td_status = UHCI_TD_IOS;	/* iso, inactive */
+		std->td->td_token = 0;
+		std->td->td_buffer = 0;
+		sqh->qh->hlink = csqh;
+		sqh->qh->qh_hlink = csqh->physaddr | UHCI_PTR_Q;
+		sqh->qh->elink = 0;
+		sqh->qh->qh_elink = UHCI_PTR_T;
+		sc->sc_vframes[i].htd = std;
+		sc->sc_vframes[i].etd = std;
+		sc->sc_vframes[i].hqh = sqh;
+		sc->sc_vframes[i].eqh = sqh;
+		for (j = i; 
+		     j < UHCI_FRAMELIST_COUNT; 
+		     j += UHCI_VFRAMELIST_COUNT)
+			sc->sc_pframes[j] = std->physaddr;
+	}
+
+	LIST_INIT(&sc->sc_intrhead);
+
+	/* Set up the bus struct. */
+	sc->sc_bus.open_pipe = uhci_open;
+	sc->sc_bus.pipe_size = sizeof(struct uhci_pipe);
+	sc->sc_bus.do_poll = uhci_poll;
+
+#if !defined(__OpenBSD__)
+	sc->sc_suspend = PWR_RESUME;
+	(void)powerhook_establish(uhci_power, sc);
+#endif
+
+	DPRINTFN(1,("uhci_init: enabling\n"));
+	UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE | 
+		UHCI_INTR_IOCE | UHCI_INTR_SPIE);	/* enable interrupts */
+
+	return (uhci_run(sc, 1));		/* and here we go... */
+}
+
+#if !defined(__OpenBSD__)
+/*
+ * Handle suspend/resume.
+ *
+ * Must use delay() here since we are called from an interrupt
+ * context, but since we are close to being inactive anyway
+ * it doesn't matter.
+ */
+void
+uhci_power(why, v)
+	int why;
+	void *v;
+{
+	uhci_softc_t *sc = v;
+	int cmd;
+	int s;
+
+	s = splusb();
+	cmd = UREAD2(sc, UHCI_CMD);
+
+	DPRINTF(("uhci_power: sc=%p, why=%d (was %d), cmd=0x%x\n", 
+		 sc, why, sc->sc_suspend, cmd));
+
+	if (why != PWR_RESUME) {
+#if defined(USB_DEBUG)
+		if (uhcidebug > 2)
+			uhci_dumpregs(sc);
+#endif
+		if (sc->sc_has_timo)
+			usb_untimeout(uhci_timo, sc->sc_has_timo, 
+				      sc->sc_has_timo->timo_handle);
+		uhci_run(sc, 0); /* stop the controller */
+		UHCICMD(sc, cmd | UHCI_CMD_EGSM); /* enter global suspend */
+		delay(USB_RESUME_WAIT * 1000);
+		sc->sc_suspend = why;
+		DPRINTF(("uhci_power: cmd=0x%x\n", UREAD2(sc, UHCI_CMD)));
+	} else {
+		/*
+		 * XXX We should really do much more here in case the
+		 * controller registers have been lost and BIOS has
+		 * not restored them.
+		 */
+		sc->sc_suspend = why;
+		if (cmd & UHCI_CMD_RS)
+			uhci_run(sc, 0); /* in case BIOS has started it */
+		UHCICMD(sc, cmd | UHCI_CMD_FGR); /* force global resume */
+		delay(USB_RESUME_DELAY * 1000);
+		UHCICMD(sc, cmd & ~UHCI_CMD_EGSM); /* back to normal */
+		UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE | 
+			UHCI_INTR_IOCE | UHCI_INTR_SPIE); /* re-enable intrs */
+		uhci_run(sc, 1); /* and start traffic again */
+		delay(USB_RESUME_RECOVERY * 1000);
+		if (sc->sc_has_timo)
+			usb_timeout(uhci_timo, sc->sc_has_timo, 
+				    sc->sc_ival, sc->sc_has_timo->timo_handle);
+#if defined(USB_DEBUG)
+		if (uhcidebug > 2)
+			uhci_dumpregs(sc);
+#endif
+	}
+	splx(s);
+}
+#endif
+
+#ifdef USB_DEBUG
+static void
+uhci_dumpregs(sc)
+	uhci_softc_t *sc;
+{
+	printf("%s regs: cmd=%04x, sts=%04x, intr=%04x, frnum=%04x, "
+	       "flbase=%08x, sof=%04x, portsc1=%04x, portsc2=%04x\n",
+	       USBDEVNAME(sc->sc_bus.bdev),
+	       UREAD2(sc, UHCI_CMD),
+	       UREAD2(sc, UHCI_STS),
+	       UREAD2(sc, UHCI_INTR),
+	       UREAD2(sc, UHCI_FRNUM),
+	       UREAD4(sc, UHCI_FLBASEADDR),
+	       UREAD2(sc, UHCI_SOF),
+	       UREAD2(sc, UHCI_PORTSC1),
+	       UREAD2(sc, UHCI_PORTSC2));
+}
+
+int uhci_longtd = 1;
+
+void
+uhci_dump_td(p)
+	uhci_soft_td_t *p;
+{
+	printf("TD(%p) at %08lx = link=0x%08lx status=0x%08lx "
+	       "token=0x%08lx buffer=0x%08lx\n",
+	       p, (long)p->physaddr,
+	       (long)p->td->td_link,
+	       (long)p->td->td_status,
+	       (long)p->td->td_token,
+	       (long)p->td->td_buffer);
+	if (uhci_longtd)
+		printf("  %b %b,errcnt=%d,actlen=%d pid=%02x,addr=%d,endpt=%d,"
+		       "D=%d,maxlen=%d\n",
+		       (int)p->td->td_link,
+		       "\20\1T\2Q\3VF",
+		       (int)p->td->td_status,
+		       "\20\22BITSTUFF\23CRCTO\24NAK\25BABBLE\26DBUFFER\27"
+		       "STALLED\30ACTIVE\31IOC\32ISO\33LS\36SPD",
+		       UHCI_TD_GET_ERRCNT(p->td->td_status),
+		       UHCI_TD_GET_ACTLEN(p->td->td_status),
+		       UHCI_TD_GET_PID(p->td->td_token),
+		       UHCI_TD_GET_DEVADDR(p->td->td_token),
+		       UHCI_TD_GET_ENDPT(p->td->td_token),
+		       UHCI_TD_GET_DT(p->td->td_token),
+		       UHCI_TD_GET_MAXLEN(p->td->td_token));
+}
+
+void
+uhci_dump_qh(p)
+	uhci_soft_qh_t *p;
+{
+	printf("QH(%p) at %08x: hlink=%08x elink=%08x\n", p, (int)p->physaddr,
+	       p->qh->qh_hlink, p->qh->qh_elink);
+}
+
+
+#if 0
+void
+uhci_dump()
+{
+	uhci_softc_t *sc = uhci;
+
+	uhci_dumpregs(sc);
+	printf("intrs=%d\n", sc->sc_intrs);
+	printf("framelist[i].link = %08x\n", sc->sc_framelist[0].link);
+	uhci_dump_qh(sc->sc_ctl_start->qh->hlink);
+}
+#endif
+
+void
+uhci_dump_tds(std)
+	uhci_soft_td_t *std;
+{
+	uhci_soft_td_t *p;
+
+	for(p = std; p; p = p->td->link.std)
+		uhci_dump_td(p);
+}
+#endif
+
+/*
+ * This routine is executed periodically and simulates interrupts
+ * from the root controller interrupt pipe for port status change.
+ */
+void
+uhci_timo(addr)
+	void *addr;
+{
+	usbd_request_handle reqh = addr;
+	usbd_pipe_handle pipe = reqh->pipe;
+	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	int s;
+	u_char *p;
+
+	DPRINTFN(15, ("uhci_timo\n"));
+
+	p = KERNADDR(&upipe->u.intr.datadma);
+	p[0] = 0;
+	if (UREAD2(sc, UHCI_PORTSC1) & (UHCI_PORTSC_CSC|UHCI_PORTSC_OCIC))
+		p[0] |= 1<<1;
+	if (UREAD2(sc, UHCI_PORTSC2) & (UHCI_PORTSC_CSC|UHCI_PORTSC_OCIC))
+		p[0] |= 1<<2;
+	s = splusb();
+	if (p[0] != 0) {
+		reqh->actlen = 1;
+		reqh->status = USBD_NORMAL_COMPLETION;
+		reqh->xfercb(reqh);
+	}
+	if (reqh->pipe->repeat) {
+		usb_timeout(uhci_timo, reqh, sc->sc_ival, reqh->timo_handle);
+	} else {
+		usb_freemem(sc->sc_dmatag, &upipe->u.intr.datadma);
+		usb_start_next(reqh->pipe);
+	}
+	splx(s);
+}
+
+
+void
+uhci_lock_frames(sc)
+	uhci_softc_t *sc;
+{
+	int s = splusb();
+	while (sc->sc_vflock) {
+		sc->sc_vflock |= UHCI_WANT_LOCK;
+		tsleep(&sc->sc_vflock, PRIBIO, "uhcqhl", 0);
+	}
+	sc->sc_vflock = UHCI_HAS_LOCK;
+	splx(s);
+}
+
+void
+uhci_unlock_frames(sc)
+	uhci_softc_t *sc;
+{
+	int s = splusb();
+	sc->sc_vflock &= ~UHCI_HAS_LOCK;
+	if (sc->sc_vflock & UHCI_WANT_LOCK)
+		wakeup(&sc->sc_vflock);
+	splx(s);
+}
+
+/*
+ * Allocate an interrupt information struct.  A free list is kept
+ * for fast allocation.
+ */
+uhci_intr_info_t *
+uhci_alloc_intr_info(sc)
+	uhci_softc_t *sc;
+{
+	uhci_intr_info_t *ii;
+
+	ii = LIST_FIRST(&uhci_ii_free);
+	if (ii)
+		LIST_REMOVE(ii, list);
+	else {
+		ii = malloc(sizeof(uhci_intr_info_t), M_USBHC, M_NOWAIT);
+	}
+	ii->sc = sc;
+	return ii;
+}
+
+void
+uhci_free_intr_info(ii)
+	uhci_intr_info_t *ii;
+{
+	LIST_INSERT_HEAD(&uhci_ii_free, ii, list); /* and put on free list */
+}
+
+/* Add control QH, called at splusb(). */
+void
+uhci_add_ctrl(sc, sqh)
+	uhci_softc_t *sc;
+	uhci_soft_qh_t *sqh;
+{
+	uhci_qh_t *eqh;
+
+	DPRINTFN(10, ("uhci_add_ctrl: sqh=%p\n", sqh));
+	eqh = sc->sc_ctl_end->qh;
+	sqh->qh->hlink     = eqh->hlink;
+	sqh->qh->qh_hlink  = eqh->qh_hlink;
+	eqh->hlink         = sqh;
+	eqh->qh_hlink      = sqh->physaddr | UHCI_PTR_Q;
+	sc->sc_ctl_end = sqh;
+}
+
+/* Remove control QH, called at splusb(). */
+void
+uhci_remove_ctrl(sc, sqh)
+	uhci_softc_t *sc;
+	uhci_soft_qh_t *sqh;
+{
+	uhci_soft_qh_t *pqh;
+
+	DPRINTFN(10, ("uhci_remove_ctrl: sqh=%p\n", sqh));
+	for (pqh = sc->sc_ctl_start; pqh->qh->hlink != sqh; pqh=pqh->qh->hlink)
+#if defined(DIAGNOSTIC) || defined(USB_DEBUG)		
+		if (pqh->qh->qh_hlink & UHCI_PTR_T) {
+			printf("uhci_remove_ctrl: QH not found\n");
+			return;
+		}
+#else
+		;
+#endif
+	pqh->qh->hlink    = sqh->qh->hlink;
+	pqh->qh->qh_hlink = sqh->qh->qh_hlink;
+	if (sc->sc_ctl_end == sqh)
+		sc->sc_ctl_end = pqh;
+}
+
+/* Add bulk QH, called at splusb(). */
+void
+uhci_add_bulk(sc, sqh)
+	uhci_softc_t *sc;
+	uhci_soft_qh_t *sqh;
+{
+	uhci_qh_t *eqh;
+
+	DPRINTFN(10, ("uhci_add_bulk: sqh=%p\n", sqh));
+	eqh = sc->sc_bulk_end->qh;
+	sqh->qh->hlink     = eqh->hlink;
+	sqh->qh->qh_hlink  = eqh->qh_hlink;
+	eqh->hlink         = sqh;
+	eqh->qh_hlink      = sqh->physaddr | UHCI_PTR_Q;
+	sc->sc_bulk_end = sqh;
+}
+
+/* Remove bulk QH, called at splusb(). */
+void
+uhci_remove_bulk(sc, sqh)
+	uhci_softc_t *sc;
+	uhci_soft_qh_t *sqh;
+{
+	uhci_soft_qh_t *pqh;
+
+	DPRINTFN(10, ("uhci_remove_bulk: sqh=%p\n", sqh));
+	for (pqh = sc->sc_bulk_start; 
+	     pqh->qh->hlink != sqh; 
+	     pqh = pqh->qh->hlink)
+#if defined(DIAGNOSTIC) || defined(USB_DEBUG)		
+		if (pqh->qh->qh_hlink & UHCI_PTR_T) {
+			printf("uhci_remove_bulk: QH not found\n");
+			return;
+		}
+#else
+		;
+#endif
+	pqh->qh->hlink    = sqh->qh->hlink;
+	pqh->qh->qh_hlink = sqh->qh->qh_hlink;
+	if (sc->sc_bulk_end == sqh)
+		sc->sc_bulk_end = pqh;
+}
+
+int
+uhci_intr(p)
+	void *p;
+{
+	uhci_softc_t *sc = p;
+	int status, ret;
+	uhci_intr_info_t *ii;
+
+	sc->sc_intrs++;
+#if defined(USB_DEBUG)
+	if (uhcidebug > 9) {
+		printf("uhci_intr %p\n", sc);
+		uhci_dumpregs(sc);
+	}
+#endif
+	status = UREAD2(sc, UHCI_STS);
+#if !defined(__OpenBSD__)
+#ifdef DIAGNOSTIC
+	if (sc->sc_suspend != PWR_RESUME)
+		printf("uhci_intr: suspended sts=0x%x\n", status);
+#endif
+#endif
+	ret = 0;
+	if (status & UHCI_STS_USBINT) {
+		UWRITE2(sc, UHCI_STS, UHCI_STS_USBINT); /* acknowledge */
+		ret = 1;
+	}
+	if (status & UHCI_STS_USBEI) {
+		UWRITE2(sc, UHCI_STS, UHCI_STS_USBEI); /* acknowledge */
+		ret = 1;
+	}
+	if (status & UHCI_STS_RD) {
+		UWRITE2(sc, UHCI_STS, UHCI_STS_RD); /* acknowledge */
+		printf("%s: resume detect\n", USBDEVNAME(sc->sc_bus.bdev));
+		ret = 1;
+	}
+	if (status & UHCI_STS_HSE) {
+		UWRITE2(sc, UHCI_STS, UHCI_STS_HSE); /* acknowledge */
+		printf("%s: Host System Error\n", USBDEVNAME(sc->sc_bus.bdev));
+		ret = 1;
+	}
+	if (status & UHCI_STS_HCPE) {
+		UWRITE2(sc, UHCI_STS, UHCI_STS_HCPE); /* acknowledge */
+		printf("%s: Host System Error\n", USBDEVNAME(sc->sc_bus.bdev));
+		ret = 1;
+	}
+	if (status & UHCI_STS_HCH)
+		printf("%s: controller halted\n", USBDEVNAME(sc->sc_bus.bdev));
+	if (!ret)
+		return 0;
+
+	/*
+	 * Interrupts on UHCI really suck.  When the host controller
+	 * interrupts because a transfer is completed there is no
+	 * way of knowing which transfer it was.  You can scan down
+	 * the TDs and QHs of the previous frame to limit the search,
+	 * but that assumes that the interrupt was not delayed by more
+	 * than 1 ms, which may not always be true (e.g. after debug
+	 * output on a slow console).
+	 * We scan all interrupt descriptors to see if any have
+	 * completed.
+	 */
+	for (ii = LIST_FIRST(&sc->sc_intrhead); ii; ii = LIST_NEXT(ii, list))
+		uhci_check_intr(sc, ii);
+
+	DPRINTFN(10, ("uhci_intr: exit\n"));
+	return 1;
+}
+
+/* Check for an interrupt. */
+void
+uhci_check_intr(sc, ii)
+	uhci_softc_t *sc;
+	uhci_intr_info_t *ii;
+{
+	struct uhci_pipe *upipe;
+	uhci_soft_td_t *std, *lstd;
+	u_int32_t status;
+
+	DPRINTFN(15, ("uhci_check_intr: ii=%p\n", ii));
+#ifdef DIAGNOSTIC
+	if (!ii) {
+		printf("uhci_check_intr: no ii? %p\n", ii);
+		return;
+	}
+#endif
+	if (!ii->stdstart)
+		return;
+	lstd = ii->stdend;
+#ifdef DIAGNOSTIC
+	if (!lstd) {
+		printf("uhci_check_intr: std==0\n");
+		return;
+	}
+#endif
+	/* 
+	 * If the last TD is still active we need to check whether there
+	 * is a an error somewhere in the middle, or whether there was a
+	 * short packet (SPD and not ACTIVE).
+	 */
+	if (lstd->td->td_status & UHCI_TD_ACTIVE) {
+		DPRINTFN(15, ("uhci_check_intr: active ii=%p\n", ii));
+		for (std = ii->stdstart; std != lstd; std = std->td->link.std){
+			status = std->td->td_status;
+			if ((status & UHCI_TD_STALLED) ||
+			     (status & (UHCI_TD_SPD | UHCI_TD_ACTIVE)) == 
+			     UHCI_TD_SPD)
+				goto done;
+		}
+		DPRINTFN(15, ("uhci_check_intr: ii=%p std=%p still active\n",
+			      ii, ii->stdstart));
+		return;
+	}
+ done:
+	usb_untimeout(uhci_timeout, ii, ii->timeout_handle);
+	upipe = (struct uhci_pipe *)ii->reqh->pipe;
+	uhci_ii_done(ii);
+	upipe->pipe.endpoint->toggle = upipe->nexttoggle;
+}
+
+void
+uhci_ii_done(ii)
+	uhci_intr_info_t *ii;
+{
+	usbd_request_handle reqh = ii->reqh;
+	uhci_soft_td_t *std;
+	u_int32_t status;
+	int actlen;
+
+#ifdef USB_DEBUG
+	DPRINTFN(10, ("uhci_ii_done: ii=%p ready\n", ii));
+	if (uhcidebug > 10)
+		uhci_dump_tds(ii->stdstart);
+#endif
+
+	if (reqh->status == USBD_CANCELLED ||
+	    reqh->status == USBD_TIMEOUT) {
+		DPRINTF(("uhci_ii_done: aborted reqh=%p\n", reqh));
+		return;
+	}
+
+#ifdef DIAGNOSTIC
+	{
+		int s = splhigh();
+		if (ii->isdone) {
+			splx(s);
+			printf("uhci_ii_done: ii=%p is done!\n", ii);
+			return;
+		}
+		ii->isdone = 1;
+		splx(s);
+	}
+#endif
+
+	/* The transfer is done, compute actual length and status. */
+	/* XXX Is this correct for control xfers? */
+	actlen = 0;
+	for (std = ii->stdstart; std; std = std->td->link.std) {
+		status = std->td->td_status;
+		if (status & UHCI_TD_ACTIVE)
+			break;
+		if (UHCI_TD_GET_PID(std->td->td_token) != UHCI_TD_PID_SETUP)
+			actlen += UHCI_TD_GET_ACTLEN(status);
+	}
+	status &= UHCI_TD_ERROR;
+	DPRINTFN(10, ("uhci_check_intr: actlen=%d, status=0x%x\n", 
+		      actlen, status));
+	reqh->actlen = actlen;
+	if (status != 0) {
+		DPRINTFN(-1+((status&UHCI_TD_STALLED)!=0),
+			 ("uhci_ii_done: error, addr=%d, endpt=0x%02x, "
+			  "status 0x%b\n",
+			  reqh->pipe->device->address,
+			  reqh->pipe->endpoint->edesc->bEndpointAddress,
+			  (int)status, 
+			  "\20\22BITSTUFF\23CRCTO\24NAK\25BABBLE\26DBUFFER\27"
+			  "STALLED\30ACTIVE"));
+		if (status == UHCI_TD_STALLED)
+			reqh->status = USBD_STALLED;
+		else
+			reqh->status = USBD_IOERROR; /* more info XXX */
+	} else {
+		reqh->status = USBD_NORMAL_COMPLETION;
+	}
+	uhci_ii_finish(ii);
+}
+
+void
+uhci_ii_finish(ii)
+	uhci_intr_info_t *ii;
+{
+	usbd_request_handle reqh = ii->reqh;
+
+	DPRINTFN(5, ("uhci_ii_finish: calling handler ii=%p\n", ii));
+
+	switch (reqh->pipe->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
+	case UE_CONTROL:
+		uhci_ctrl_done(ii);
+		usb_start_next(reqh->pipe);
+		break;
+	case UE_ISOCHRONOUS:
+		uhci_isoc_done(ii);
+		usb_start_next(reqh->pipe);
+		break;
+	case UE_BULK:
+		uhci_bulk_done(ii);
+		usb_start_next(reqh->pipe);
+		break;
+	case UE_INTERRUPT:
+		uhci_intr_done(ii);
+		break;
+	}
+
+	/* And finally execute callback. */
+	reqh->xfercb(reqh);
+}
+
+/*
+ * Called when a request does not complete.
+ */
+void
+uhci_timeout(addr)
+	void *addr;
+{
+	uhci_intr_info_t *ii = addr;
+
+	DPRINTF(("uhci_timeout: ii=%p\n", ii));
+	uhci_abort_req(ii->reqh, USBD_TIMEOUT);
+}
+
+/*
+ * Wait here until controller claims to have an interrupt.
+ * Then call uhci_intr and return.  Use timeout to avoid waiting
+ * too long.
+ * Only used during boot when interrupts are not enabled yet.
+ */
+void
+uhci_waitintr(sc, reqh)
+	uhci_softc_t *sc;
+	usbd_request_handle reqh;
+{
+	int timo = reqh->timeout;
+	uhci_intr_info_t *ii;
+
+	DPRINTFN(10,("uhci_waitintr: timeout = %dms\n", timo));
+
+	reqh->status = USBD_IN_PROGRESS;
+	for (; timo >= 0; timo--) {
+		usb_delay_ms(&sc->sc_bus, 1);
+		DPRINTFN(20,("uhci_waitintr: 0x%04x\n", UREAD2(sc, UHCI_STS)));
+		if (UREAD2(sc, UHCI_STS) & UHCI_STS_USBINT) {
+			uhci_intr(sc);
+			if (reqh->status != USBD_IN_PROGRESS)
+				return;
+		}
+	}
+
+	/* Timeout */
+	DPRINTF(("uhci_waitintr: timeout\n"));
+	for (ii = LIST_FIRST(&sc->sc_intrhead);
+	     ii && ii->reqh != reqh; 
+	     ii = LIST_NEXT(ii, list))
+		;
+	if (ii)
+		uhci_ii_done(ii);
+	else
+		panic("uhci_waitintr: lost intr_info\n");
+}
+
+void
+uhci_poll(bus)
+	struct usbd_bus *bus;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)bus;
+
+	if (UREAD2(sc, UHCI_STS) & UHCI_STS_USBINT)
+		uhci_intr(sc);
+}
+
+#if 0
+void
+uhci_reset(p)
+	void *p;
+{
+	uhci_softc_t *sc = p;
+	int n;
+
+	UHCICMD(sc, UHCI_CMD_HCRESET);
+	/* The reset bit goes low when the controller is done. */
+	for (n = 0; n < UHCI_RESET_TIMEOUT && 
+		    (UREAD2(sc, UHCI_CMD) & UHCI_CMD_HCRESET); n++)
+		delay(100);
+	if (n >= UHCI_RESET_TIMEOUT)
+		printf("%s: controller did not reset\n", 
+		       USBDEVNAME(sc->sc_bus.bdev));
+}
+#endif
+
+usbd_status
+uhci_run(sc, run)
+	uhci_softc_t *sc;
+	int run;
+{
+	int s, n, running;
+
+	run = run != 0;
+	s = splusb();
+	DPRINTF(("uhci_run: setting run=%d\n", run));
+	UHCICMD(sc, run ? UHCI_CMD_RS : 0);
+	for(n = 0; n < 10; n++) {
+		running = !(UREAD2(sc, UHCI_STS) & UHCI_STS_HCH);
+		/* return when we've entered the state we want */
+		if (run == running) {
+			splx(s);
+			DPRINTF(("uhci_run: done cmd=0x%x sts=0x%x\n",
+				 UREAD2(sc, UHCI_CMD), UREAD2(sc, UHCI_STS)));
+			return (USBD_NORMAL_COMPLETION);
+		}
+		usb_delay_ms(&sc->sc_bus, 1);
+	}
+	splx(s);
+	printf("%s: cannot %s\n", USBDEVNAME(sc->sc_bus.bdev),
+	       run ? "start" : "stop");
+	return (USBD_IOERROR);
+}
+
+/*
+ * Memory management routines.
+ *  uhci_alloc_std allocates TDs
+ *  uhci_alloc_sqh allocates QHs
+ * These two routines do their own free list management,
+ * partly for speed, partly because allocating DMAable memory
+ * has page size granularaity so much memory would be wasted if
+ * only one TD/QH (32 bytes) was placed in each allocated chunk.
+ */
+
+uhci_soft_td_t *
+uhci_alloc_std(sc)
+	uhci_softc_t *sc;
+{
+	uhci_soft_td_t *std;
+	usbd_status r;
+	int i;
+	usb_dma_t dma;
+
+	if (!sc->sc_freetds) {
+		DPRINTFN(2,("uhci_alloc_std: allocating chunk\n"));
+		std = malloc(sizeof(uhci_soft_td_t) * UHCI_TD_CHUNK, 
+			     M_USBHC, M_NOWAIT);
+		if (!std)
+			return (0);
+		r = usb_allocmem(sc->sc_dmatag, UHCI_TD_SIZE * UHCI_TD_CHUNK,
+				 UHCI_TD_ALIGN, &dma);
+		if (r != USBD_NORMAL_COMPLETION) {
+			free(std, M_USBHC);
+			return (0);
+		}
+		for(i = 0; i < UHCI_TD_CHUNK; i++, std++) {
+			std->physaddr = DMAADDR(&dma) + i * UHCI_TD_SIZE;
+			std->td = (uhci_td_t *)
+				((char *)KERNADDR(&dma) + i * UHCI_TD_SIZE);
+			std->td->link.std = sc->sc_freetds;
+			sc->sc_freetds = std;
+		}
+	}
+	std = sc->sc_freetds;
+	sc->sc_freetds = std->td->link.std;
+	memset(std->td, 0, UHCI_TD_SIZE);
+	return std;
+}
+
+void
+uhci_free_std(sc, std)
+	uhci_softc_t *sc;
+	uhci_soft_td_t *std;
+{
+#ifdef DIAGNOSTIC
+#define TD_IS_FREE 0x12345678
+	if (std->td->td_token == TD_IS_FREE) {
+		printf("uhci_free_std: freeing free TD %p\n", std);
+		return;
+	}
+	std->td->td_token = TD_IS_FREE;
+#endif
+	std->td->link.std = sc->sc_freetds;
+	sc->sc_freetds = std;
+}
+
+uhci_soft_qh_t *
+uhci_alloc_sqh(sc)
+	uhci_softc_t *sc;
+{
+	uhci_soft_qh_t *sqh;
+	usbd_status r;
+	int i, offs;
+	usb_dma_t dma;
+
+	if (!sc->sc_freeqhs) {
+		DPRINTFN(2, ("uhci_alloc_sqh: allocating chunk\n"));
+		sqh = malloc(sizeof(uhci_soft_qh_t) * UHCI_QH_CHUNK, 
+			     M_USBHC, M_NOWAIT);
+		if (!sqh)
+			return 0;
+		r = usb_allocmem(sc->sc_dmatag, UHCI_QH_SIZE * UHCI_QH_CHUNK,
+				 UHCI_QH_ALIGN, &dma);
+		if (r != USBD_NORMAL_COMPLETION) {
+			free(sqh, M_USBHC);
+			return 0;
+		}
+		for(i = 0; i < UHCI_QH_CHUNK; i++, sqh++) {
+			offs = i * UHCI_QH_SIZE;
+			sqh->physaddr = DMAADDR(&dma) + offs;
+			sqh->qh = (uhci_qh_t *)
+					((char *)KERNADDR(&dma) + offs);
+			sqh->qh->hlink = sc->sc_freeqhs;
+			sc->sc_freeqhs = sqh;
+		}
+	}
+	sqh = sc->sc_freeqhs;
+	sc->sc_freeqhs = sqh->qh->hlink;
+	memset(sqh->qh, 0, UHCI_QH_SIZE);
+	return (sqh);
+}
+
+void
+uhci_free_sqh(sc, sqh)
+	uhci_softc_t *sc;
+	uhci_soft_qh_t *sqh;
+{
+	sqh->qh->hlink = sc->sc_freeqhs;
+	sc->sc_freeqhs = sqh;
+}
+
+#if 0
+/* 
+ * Enter a list of transfers onto a control queue.
+ * Called at splusb() 
+ */
+void
+uhci_enter_ctl_q(sc, sqh, ii)
+	uhci_softc_t *sc;
+	uhci_soft_qh_t *sqh;
+	uhci_intr_info_t *ii;
+{
+	DPRINTFN(5, ("uhci_enter_ctl_q: sqh=%p\n", sqh));
+
+}
+#endif
+
+void
+uhci_free_std_chain(sc, std, stdend)
+	uhci_softc_t *sc;
+	uhci_soft_td_t *std;
+	uhci_soft_td_t *stdend;
+{
+	uhci_soft_td_t *p;
+
+	for (; std != stdend; std = p) {
+		p = std->td->link.std;
+		uhci_free_std(sc, std);
+	}
+}
+
+usbd_status
+uhci_alloc_std_chain(upipe, sc, len, rd, shortok, dma, sp, ep)
+	struct uhci_pipe *upipe;
+	uhci_softc_t *sc;
+	int len, rd, shortok;
+	usb_dma_t *dma;
+	uhci_soft_td_t **sp, **ep;
+{
+	uhci_soft_td_t *p, *lastp;
+	uhci_physaddr_t lastlink;
+	int i, ntd, l, tog, maxp;
+	u_int32_t status;
+	int addr = upipe->pipe.device->address;
+	int endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
+
+	DPRINTFN(8, ("uhci_alloc_std_chain: addr=%d endpt=%d len=%d ls=%d "
+		      "shortok=%d\n", addr, UE_GET_ADDR(endpt), len, 
+		      upipe->pipe.device->lowspeed, shortok));
+	if (len == 0) {
+		*sp = *ep = 0;
+		DPRINTFN(-1,("uhci_alloc_std_chain: len=0\n"));
+		return (USBD_NORMAL_COMPLETION);
+	}
+	maxp = UGETW(upipe->pipe.endpoint->edesc->wMaxPacketSize);
+	if (maxp == 0) {
+		printf("uhci_alloc_std_chain: maxp=0\n");
+		return (USBD_INVAL);
+	}
+	ntd = (len + maxp - 1) / maxp;
+	tog = upipe->pipe.endpoint->toggle;
+	if (ntd % 2 == 0)
+		tog ^= 1;
+	upipe->nexttoggle = tog ^ 1;
+	lastp = 0;
+	lastlink = UHCI_PTR_T;
+	ntd--;
+	status = UHCI_TD_ZERO_ACTLEN(UHCI_TD_SET_ERRCNT(3) | UHCI_TD_ACTIVE);
+	if (upipe->pipe.device->lowspeed)
+		status |= UHCI_TD_LS;
+	if (shortok)
+		status |= UHCI_TD_SPD;
+	for (i = ntd; i >= 0; i--) {
+		p = uhci_alloc_std(sc);
+		if (!p) {
+			uhci_free_std_chain(sc, lastp, 0);
+			return (USBD_NOMEM);
+		}
+		p->td->link.std = lastp;
+		p->td->td_link = lastlink;
+		lastp = p;
+		lastlink = p->physaddr;
+		p->td->td_status = status;
+		if (i == ntd) {
+			/* last TD */
+			l = len % maxp;
+			if (l == 0) l = maxp;
+			*ep = p;
+		} else
+			l = maxp;
+		p->td->td_token = 
+		    rd ? UHCI_TD_IN (l, endpt, addr, tog) :
+			 UHCI_TD_OUT(l, endpt, addr, tog);
+		p->td->td_buffer = DMAADDR(dma) + i * maxp;
+		tog ^= 1;
+	}
+	*sp = lastp;
+	/*upipe->pipe.endpoint->toggle = tog;*/
+	DPRINTFN(10, ("uhci_alloc_std_chain: oldtog=%d nexttog=%d\n", 
+		      upipe->pipe.endpoint->toggle, upipe->nexttoggle));
+	return (USBD_NORMAL_COMPLETION);
+}
+
+usbd_status
+uhci_device_bulk_transfer(reqh)
+	usbd_request_handle reqh;
+{
+	int s;
+	usbd_status r;
+
+	s = splusb();
+	r = usb_insert_transfer(reqh);
+	splx(s);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	else
+		return (uhci_device_bulk_start(reqh));
+}
+
+usbd_status
+uhci_device_bulk_start(reqh)
+	usbd_request_handle reqh;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+	uhci_intr_info_t *ii = upipe->iinfo;
+	uhci_soft_td_t *xfer, *xferend;
+	uhci_soft_qh_t *sqh;
+	usb_dma_t *dmap;
+	usbd_status r;
+	int len, isread;
+	int s;
+
+	DPRINTFN(3, ("uhci_device_bulk_transfer: reqh=%p buf=%p len=%d "
+		     "flags=%d\n",
+		     reqh, reqh->buffer, reqh->length, reqh->flags));
+
+	if (reqh->isreq)
+		panic("uhci_device_bulk_transfer: a request\n");
+
+	len = reqh->length;
+	dmap = &upipe->u.bulk.datadma;
+	isread = reqh->pipe->endpoint->edesc->bEndpointAddress & UE_IN;
+	sqh = upipe->u.bulk.sqh;
+
+	upipe->u.bulk.isread = isread;
+	upipe->u.bulk.length = len;
+
+	r = usb_allocmem(sc->sc_dmatag, len, 0, dmap);
+	if (r != USBD_NORMAL_COMPLETION)
+		goto ret1;
+	r = uhci_alloc_std_chain(upipe, sc, len, isread, 
+				 reqh->flags & USBD_SHORT_XFER_OK,
+				 dmap, &xfer, &xferend);
+	if (r != USBD_NORMAL_COMPLETION)
+		goto ret2;
+	xferend->td->td_status |= UHCI_TD_IOC;
+
+	if (!isread && len != 0)
+		memcpy(KERNADDR(dmap), reqh->buffer, len);
+
+#ifdef USB_DEBUG
+	if (uhcidebug > 8) {
+		printf("uhci_device_bulk_transfer: xfer(1)\n");
+		uhci_dump_tds(xfer);
+	}
+#endif
+
+	/* Set up interrupt info. */
+	ii->reqh = reqh;
+	ii->stdstart = xfer;
+	ii->stdend = xferend;
+#ifdef DIAGNOSTIC
+	ii->isdone = 0;
+#endif
+
+	sqh->qh->elink = xfer;
+	sqh->qh->qh_elink = xfer->physaddr;
+	sqh->intr_info = ii;
+
+	s = splusb();
+	uhci_add_bulk(sc, sqh);
+	LIST_INSERT_HEAD(&sc->sc_intrhead, ii, list);
+
+	if (reqh->timeout && !sc->sc_bus.use_polling) {
+		usb_timeout(uhci_timeout, ii,
+                            MS_TO_TICKS(reqh->timeout), ii->timeout_handle);
+	}
+	splx(s);
+
+#ifdef USB_DEBUG
+	if (uhcidebug > 10) {
+		printf("uhci_device_bulk_transfer: xfer(2)\n");
+		uhci_dump_tds(xfer);
+	}
+#endif
+
+	if (sc->sc_bus.use_polling)
+		uhci_waitintr(sc, reqh);
+
+	return (USBD_IN_PROGRESS);
+
+ ret2:
+	if (len != 0)
+		usb_freemem(sc->sc_dmatag, dmap);
+ ret1:
+	return (r);
+}
+
+/* Abort a device bulk request. */
+void
+uhci_device_bulk_abort(reqh)
+	usbd_request_handle reqh;
+{
+	DPRINTF(("uhci_device_bulk_abort:\n"));
+	uhci_abort_req(reqh, USBD_CANCELLED);
+}
+
+void
+uhci_abort_req(reqh, status)
+	usbd_request_handle reqh;
+	usbd_status status;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	uhci_intr_info_t *ii = upipe->iinfo;
+	uhci_soft_td_t *std;
+	int s;
+
+	/* Make interrupt routine ignore it, */
+	reqh->status = USBD_CANCELLED;
+
+	/* make hardware ignore it, */
+	for (std = ii->stdstart; std != 0; std = std->td->link.std)
+		std->td->td_status &= ~UHCI_TD_ACTIVE;
+	/* make sure hardware has completed, */
+	usb_delay_ms(reqh->pipe->device->bus, 1);
+
+	/* and call final part of interrupt handler. */
+	s = splusb();
+	uhci_ii_finish(ii);
+	splx(s);
+}
+
+/* Close a device bulk pipe. */
+void
+uhci_device_bulk_close(pipe)
+	usbd_pipe_handle pipe;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+
+	uhci_free_sqh(sc, upipe->u.bulk.sqh);
+	uhci_free_intr_info(upipe->iinfo);
+	/* XXX free other resources */
+}
+
+usbd_status
+uhci_device_ctrl_transfer(reqh)
+	usbd_request_handle reqh;
+{
+	int s;
+	usbd_status r;
+
+	s = splusb();
+	r = usb_insert_transfer(reqh);
+	splx(s);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	else
+		return (uhci_device_ctrl_start(reqh));
+}
+
+usbd_status
+uhci_device_ctrl_start(reqh)
+	usbd_request_handle reqh;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)reqh->pipe->device->bus;
+	usbd_status r;
+
+	if (!reqh->isreq)
+		panic("uhci_device_ctrl_transfer: not a request\n");
+
+	r = uhci_device_request(reqh);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+
+	if (sc->sc_bus.use_polling)
+		uhci_waitintr(sc, reqh);
+	return (USBD_IN_PROGRESS);
+}
+
+usbd_status
+uhci_device_intr_transfer(reqh)
+	usbd_request_handle reqh;
+{
+	int s;
+	usbd_status r;
+
+	s = splusb();
+	r = usb_insert_transfer(reqh);
+	splx(s);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	else
+		return (uhci_device_intr_start(reqh));
+}
+
+usbd_status
+uhci_device_intr_start(reqh)
+	usbd_request_handle reqh;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+	uhci_intr_info_t *ii = upipe->iinfo;
+	uhci_soft_td_t *xfer, *xferend;
+	uhci_soft_qh_t *sqh;
+	usb_dma_t *dmap;
+	usbd_status r;
+	int len, i;
+	int s;
+
+	DPRINTFN(3, ("uhci_device_intr_transfer: reqh=%p buf=%p len=%d "
+		     "flags=%d\n",
+		     reqh, reqh->buffer, reqh->length, reqh->flags));
+
+	if (reqh->isreq)
+		panic("uhci_device_intr_transfer: a request\n");
+
+	len = reqh->length;
+	dmap = &upipe->u.intr.datadma;
+	if (len == 0)
+		return (USBD_INVAL); /* XXX should it be? */
+
+	r = usb_allocmem(sc->sc_dmatag, len, 0, dmap);
+	if (r != USBD_NORMAL_COMPLETION)
+		goto ret1;
+	r = uhci_alloc_std_chain(upipe, sc, len, 1,
+ 				 reqh->flags & USBD_SHORT_XFER_OK,
+				 dmap, &xfer, &xferend);
+	if (r != USBD_NORMAL_COMPLETION)
+		goto ret2;
+	xferend->td->td_status |= UHCI_TD_IOC;
+
+#ifdef USB_DEBUG
+	if (uhcidebug > 10) {
+		printf("uhci_device_intr_transfer: xfer(1)\n");
+		uhci_dump_tds(xfer);
+		uhci_dump_qh(upipe->u.intr.qhs[0]);
+	}
+#endif
+
+	s = splusb();
+	/* Set up interrupt info. */
+	ii->reqh = reqh;
+	ii->stdstart = xfer;
+	ii->stdend = xferend;
+#ifdef DIAGNOSTIC
+	ii->isdone = 0;
+#endif
+
+	DPRINTFN(10,("uhci_device_intr_transfer: qhs[0]=%p\n", 
+		     upipe->u.intr.qhs[0]));
+	for (i = 0; i < upipe->u.intr.npoll; i++) {
+		sqh = upipe->u.intr.qhs[i];
+		sqh->qh->elink = xfer;
+		sqh->qh->qh_elink = xfer->physaddr;
+	}
+	splx(s);
+
+#ifdef USB_DEBUG
+	if (uhcidebug > 10) {
+		printf("uhci_device_intr_transfer: xfer(2)\n");
+		uhci_dump_tds(xfer);
+		uhci_dump_qh(upipe->u.intr.qhs[0]);
+	}
+#endif
+
+	return (USBD_IN_PROGRESS);
+
+ ret2:
+	if (len != 0)
+		usb_freemem(sc->sc_dmatag, dmap);
+ ret1:
+	return (r);
+}
+
+/* Abort a device control request. */
+void
+uhci_device_ctrl_abort(reqh)
+	usbd_request_handle reqh;
+{
+	DPRINTF(("uhci_device_ctrl_abort:\n"));
+	uhci_abort_req(reqh, USBD_CANCELLED);
+}
+
+/* Close a device control pipe. */
+void
+uhci_device_ctrl_close(pipe)
+	usbd_pipe_handle pipe;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+
+	uhci_free_intr_info(upipe->iinfo);
+	/* XXX free other resources */
+}
+
+/* Abort a device interrupt request. */
+void
+uhci_device_intr_abort(reqh)
+	usbd_request_handle reqh;
+{
+	struct uhci_pipe *upipe;
+
+	DPRINTFN(1, ("uhci_device_intr_abort: reqh=%p\n", reqh));
+	/* XXX inactivate */
+	usb_delay_ms(reqh->pipe->device->bus, 2); /* make sure it is done */
+	if (reqh->pipe->repeat) {
+		DPRINTF(("uhci_device_intr_abort: remove\n"));
+		reqh->pipe->repeat = 0;
+		upipe = (struct uhci_pipe *)reqh->pipe;
+		uhci_intr_done(upipe->u.intr.qhs[0]->intr_info);
+	}
+}
+
+/* Close a device interrupt pipe. */
+void
+uhci_device_intr_close(pipe)
+	usbd_pipe_handle pipe;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
+	int i, s, npoll;
+
+	upipe->iinfo->stdstart = 0;		/* inactive */
+
+	/* Unlink descriptors from controller data structures. */
+	npoll = upipe->u.intr.npoll;
+	uhci_lock_frames(sc);
+	for (i = 0; i < npoll; i++)
+		uhci_remove_intr(sc, upipe->u.intr.qhs[i]->pos, 
+				 upipe->u.intr.qhs[i]);
+	uhci_unlock_frames(sc);
+
+	/* 
+	 * We now have to wait for any activity on the physical
+	 * descriptors to stop.
+	 */
+	usb_delay_ms(&sc->sc_bus, 2);
+
+	for(i = 0; i < npoll; i++)
+		uhci_free_sqh(sc, upipe->u.intr.qhs[i]);
+	free(upipe->u.intr.qhs, M_USBHC);
+
+	s = splusb();
+	LIST_REMOVE(upipe->iinfo, list);	/* remove from active list */
+	splx(s);
+	uhci_free_intr_info(upipe->iinfo);
+
+	/* XXX free other resources */
+}
+
+usbd_status
+uhci_device_request(reqh)
+	usbd_request_handle reqh;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	usb_device_request_t *req = &reqh->request;
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+	int addr = dev->address;
+	int endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
+	uhci_intr_info_t *ii = upipe->iinfo;
+	uhci_soft_td_t *setup, *xfer, *stat, *next, *xferend;
+	uhci_soft_qh_t *sqh;
+	usb_dma_t *dmap;
+	int len;
+	u_int32_t ls;
+	usbd_status r;
+	int isread;
+	int s;
+
+	DPRINTFN(3,("uhci_device_control type=0x%02x, request=0x%02x, "
+		    "wValue=0x%04x, wIndex=0x%04x len=%d, addr=%d, endpt=%d\n",
+		    req->bmRequestType, req->bRequest, UGETW(req->wValue),
+		    UGETW(req->wIndex), UGETW(req->wLength),
+		    addr, endpt));
+
+	ls = dev->lowspeed ? UHCI_TD_LS : 0;
+	isread = req->bmRequestType & UT_READ;
+	len = UGETW(req->wLength);
+
+	setup = upipe->u.ctl.setup;
+	stat = upipe->u.ctl.stat;
+	sqh = upipe->u.ctl.sqh;
+	dmap = &upipe->u.ctl.datadma;
+
+	/* Set up data transaction */
+	if (len != 0) {
+		r = usb_allocmem(sc->sc_dmatag, len, 0, dmap);
+		if (r != USBD_NORMAL_COMPLETION)
+			goto ret1;
+		upipe->pipe.endpoint->toggle = 1;
+		r = uhci_alloc_std_chain(upipe, sc, len, isread, 
+					 reqh->flags & USBD_SHORT_XFER_OK,
+					 dmap, &xfer, &xferend);
+		if (r != USBD_NORMAL_COMPLETION)
+			goto ret2;
+		next = xfer;
+		xferend->td->link.std = stat;
+		xferend->td->td_link = stat->physaddr;
+	} else {
+		next = stat;
+	}
+	upipe->u.ctl.length = len;
+
+	memcpy(KERNADDR(&upipe->u.ctl.reqdma), req, sizeof *req);
+	if (!isread && len != 0)
+		memcpy(KERNADDR(dmap), reqh->buffer, len);
+
+	setup->td->link.std = next;
+	setup->td->td_link = next->physaddr;
+	setup->td->td_status = UHCI_TD_SET_ERRCNT(2) | ls | UHCI_TD_ACTIVE;
+	setup->td->td_token = UHCI_TD_SETUP(sizeof *req, endpt, addr);
+	setup->td->td_buffer = DMAADDR(&upipe->u.ctl.reqdma);
+
+	stat->td->link.std = 0;
+	stat->td->td_link = UHCI_PTR_T;
+	stat->td->td_status = UHCI_TD_SET_ERRCNT(2) | ls | 
+		UHCI_TD_ACTIVE | UHCI_TD_IOC;
+	stat->td->td_token = 
+		isread ? UHCI_TD_OUT(0, endpt, addr, 1) :
+		         UHCI_TD_IN (0, endpt, addr, 1);
+	stat->td->td_buffer = 0;
+
+#ifdef USB_DEBUG
+	if (uhcidebug > 20) {
+		printf("uhci_device_request: setup\n");
+		uhci_dump_td(setup);
+		printf("uhci_device_request: stat\n");
+		uhci_dump_td(stat);
+	}
+#endif
+
+	/* Set up interrupt info. */
+	ii->reqh = reqh;
+	ii->stdstart = setup;
+	ii->stdend = stat;
+#ifdef DIAGNOSTIC
+	ii->isdone = 0;
+#endif
+
+	sqh->qh->elink = setup;
+	sqh->qh->qh_elink = setup->physaddr;
+	sqh->intr_info = ii;
+
+	s = splusb();
+	uhci_add_ctrl(sc, sqh);
+	LIST_INSERT_HEAD(&sc->sc_intrhead, ii, list);
+#ifdef USB_DEBUG
+	if (uhcidebug > 12) {
+		uhci_soft_td_t *std;
+		uhci_soft_qh_t *xqh;
+		uhci_soft_qh_t *sxqh;
+		int maxqh = 0;
+		uhci_physaddr_t link;
+		printf("uhci_enter_ctl_q: follow from [0]\n");
+		for (std = sc->sc_vframes[0].htd, link = 0;
+		     (link & UHCI_PTR_Q) == 0;
+		     std = std->td->link.std) {
+			link = std->td->td_link;
+			uhci_dump_td(std);
+		}
+		for (sxqh = xqh = (uhci_soft_qh_t *)std;
+		     xqh;
+		     xqh = (maxqh++ == 5 || xqh->qh->hlink==sxqh || 
+                            xqh->qh->hlink==xqh ? NULL : xqh->qh->hlink)) {
+			uhci_dump_qh(xqh);
+			uhci_dump_qh(sxqh);
+		}
+		printf("Enqueued QH:\n");
+		uhci_dump_qh(sqh);
+		uhci_dump_tds(sqh->qh->elink);
+	}
+#endif
+	if (reqh->timeout && !sc->sc_bus.use_polling) {
+		usb_timeout(uhci_timeout, ii,
+                            MS_TO_TICKS(reqh->timeout), ii->timeout_handle);
+	}
+	splx(s);
+
+	return (USBD_NORMAL_COMPLETION);
+
+ ret2:
+	if (len != 0)
+		usb_freemem(sc->sc_dmatag, dmap);
+ ret1:
+	return (r);
+}
+
+usbd_status
+uhci_device_isoc_transfer(reqh)
+	usbd_request_handle reqh;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+#ifdef USB_DEBUG
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+#endif
+
+	DPRINTFN(1,("uhci_device_isoc_transfer: sc=%p\n", sc));
+	if (upipe->u.iso.bufsize == 0)
+		return (USBD_INVAL);
+
+	/* XXX copy data */
+	return (USBD_XXX);
+}
+
+usbd_status
+uhci_device_isoc_start(reqh)
+	usbd_request_handle reqh;
+{
+	return (USBD_XXX);
+}
+
+void
+uhci_device_isoc_abort(reqh)
+	usbd_request_handle reqh;
+{
+	/* XXX Can't abort this. */
+}
+
+void
+uhci_device_isoc_close(pipe)
+	usbd_pipe_handle pipe;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+	struct iso *iso;
+	int i;
+
+	/*
+	 * Make sure all TDs are marked as inactive.
+	 * Wait for completion.
+	 * Unschedule.
+	 * Deallocate.
+	 */
+	iso = &upipe->u.iso;
+
+	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++)
+		iso->stds[i]->td->td_status &= ~UHCI_TD_ACTIVE;
+	usb_delay_ms(&sc->sc_bus, 2); /* wait for completion */
+
+	uhci_lock_frames(sc);
+	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
+		uhci_soft_td_t *std, *vstd;
+
+		std = iso->stds[i];
+		for (vstd = sc->sc_vframes[i % UHCI_VFRAMELIST_COUNT].htd;
+		     vstd && vstd->td->link.std != std;
+		     vstd = vstd->td->link.std)
+			;
+		if (!vstd) {
+			/*panic*/
+			printf("uhci_device_isoc_close: %p not found\n", std);
+			uhci_unlock_frames(sc);
+			return;
+		}
+		vstd->td->link = std->td->link;
+		vstd->td->td_link = std->td->td_link;
+		uhci_free_std(sc, std);
+	}
+	uhci_unlock_frames(sc);
+
+	for (i = 0; i < iso->nbuf; i++)
+		usb_freemem(sc->sc_dmatag, &iso->bufs[i]);
+	free(iso->stds, M_USBHC);
+	free(iso->bufs, M_USBHC);
+
+	/* XXX what else? */
+}
+
+usbd_status
+uhci_device_isoc_setbuf(pipe, bufsize, nbuf)
+	usbd_pipe_handle pipe;
+	u_int bufsize;
+	u_int nbuf;
+{
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	usbd_device_handle dev = upipe->pipe.device;
+	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
+	int addr = upipe->pipe.device->address;
+	int endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
+	int rd = upipe->pipe.endpoint->edesc->bEndpointAddress & UE_IN;
+	struct iso *iso;
+	int i;
+	usbd_status r;
+
+	/* 
+	 * For simplicity the number of buffers must fit nicely in the frame
+	 * list.
+	 */
+	if (UHCI_VFRAMELIST_COUNT % nbuf != 0)
+		return (USBD_INVAL);
+
+	iso = &upipe->u.iso;
+	iso->bufsize = bufsize;
+	iso->nbuf = nbuf;
+
+	/* Allocate memory for buffers. */
+	iso->bufs = malloc(nbuf * sizeof(usb_dma_t), M_USBHC, M_WAITOK);
+	iso->stds = malloc(UHCI_VFRAMELIST_COUNT * sizeof (uhci_soft_td_t *),
+			   M_USBHC, M_WAITOK);
+
+	for (i = 0; i < nbuf; i++) {
+		r = usb_allocmem(sc->sc_dmatag, bufsize, 0, &iso->bufs[i]);
+		if (r != USBD_NORMAL_COMPLETION) {
+			nbuf = i;
+			goto bad1;
+		}
+	}
+
+	/* Allocate the TDs. */
+	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
+		iso->stds[i] = uhci_alloc_std(sc);
+		if (iso->stds[i] == 0)
+			goto bad2;
+	}
+
+	/* XXX check schedule */
+
+	/* XXX interrupts */
+
+	/* Insert TDs into schedule, all marked inactive. */
+	uhci_lock_frames(sc);
+	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
+		uhci_soft_td_t *std, *vstd;
+
+		std = iso->stds[i];
+		std->td->td_status = UHCI_TD_IOS;	/* iso, inactive */
+		std->td->td_token =
+		    rd ? UHCI_TD_IN (0, endpt, addr, 0) :
+			 UHCI_TD_OUT(0, endpt, addr, 0);
+		std->td->td_buffer = DMAADDR(&iso->bufs[i % nbuf]);
+
+		vstd = sc->sc_vframes[i % UHCI_VFRAMELIST_COUNT].htd;
+		std->td->link = vstd->td->link;
+		std->td->td_link = vstd->td->td_link;
+		vstd->td->link.std = std;
+		vstd->td->td_link = std->physaddr;
+	}
+	uhci_unlock_frames(sc);
+
+	return (USBD_NORMAL_COMPLETION);
+
+ bad2:
+	while (--i >= 0)
+		uhci_free_std(sc, iso->stds[i]);
+ bad1:
+	for (i = 0; i < nbuf; i++)
+		usb_freemem(sc->sc_dmatag, &iso->bufs[i]);
+	free(iso->stds, M_USBHC);
+	free(iso->bufs, M_USBHC);
+	return (USBD_NOMEM);
+}
+
+void
+uhci_isoc_done(ii)
+	uhci_intr_info_t *ii;
+{
+}
+
+void
+uhci_intr_done(ii)
+	uhci_intr_info_t *ii;
+{
+	uhci_softc_t *sc = ii->sc;
+	usbd_request_handle reqh = ii->reqh;
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	usb_dma_t *dma;
+	uhci_soft_qh_t *sqh;
+	int i, npoll;
+
+	DPRINTFN(5, ("uhci_intr_done: length=%d\n", reqh->actlen));
+
+	dma = &upipe->u.intr.datadma;
+	memcpy(reqh->buffer, KERNADDR(dma), reqh->actlen);
+	npoll = upipe->u.intr.npoll;
+	for(i = 0; i < npoll; i++) {
+		sqh = upipe->u.intr.qhs[i];
+		sqh->qh->elink = 0;
+		sqh->qh->qh_elink = UHCI_PTR_T;
+	}
+	uhci_free_std_chain(sc, ii->stdstart, 0);
+
+	/* XXX Wasteful. */
+	if (reqh->pipe->repeat) {
+		uhci_soft_td_t *xfer, *xferend;
+
+		/* This alloc cannot fail since we freed the chain above. */
+		uhci_alloc_std_chain(upipe, sc, reqh->length, 1,
+				     reqh->flags & USBD_SHORT_XFER_OK,
+				     dma, &xfer, &xferend);
+		xferend->td->td_status |= UHCI_TD_IOC;
+
+#ifdef USB_DEBUG
+		if (uhcidebug > 10) {
+			printf("uhci_device_intr_done: xfer(1)\n");
+			uhci_dump_tds(xfer);
+			uhci_dump_qh(upipe->u.intr.qhs[0]);
+		}
+#endif
+
+		ii->stdstart = xfer;
+		ii->stdend = xferend;
+#ifdef DIAGNOSTIC
+		ii->isdone = 0;
+#endif
+		for (i = 0; i < npoll; i++) {
+			sqh = upipe->u.intr.qhs[i];
+			sqh->qh->elink = xfer;
+			sqh->qh->qh_elink = xfer->physaddr;
+		}
+	} else {
+		usb_freemem(sc->sc_dmatag, dma);
+		ii->stdstart = 0;	/* mark as inactive */
+		usb_start_next(reqh->pipe);
+	}
+}
+
+/* Deallocate request data structures */
+void
+uhci_ctrl_done(ii)
+	uhci_intr_info_t *ii;
+{
+	uhci_softc_t *sc = ii->sc;
+	usbd_request_handle reqh = ii->reqh;
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	u_int len = upipe->u.ctl.length;
+	usb_dma_t *dma;
+	uhci_td_t *htd = ii->stdstart->td;
+
+#ifdef DIAGNOSTIC
+	if (!reqh->isreq)
+		panic("uhci_ctrl_done: not a request\n");
+#endif
+
+	LIST_REMOVE(ii, list);	/* remove from active list */
+
+	uhci_remove_ctrl(sc, upipe->u.ctl.sqh);
+
+	if (len != 0) {
+		dma = &upipe->u.ctl.datadma;
+		if (reqh->request.bmRequestType & UT_READ)
+			memcpy(reqh->buffer, KERNADDR(dma), len);
+		uhci_free_std_chain(sc, htd->link.std, ii->stdend);
+		usb_freemem(sc->sc_dmatag, dma);
+	}
+	DPRINTFN(5, ("uhci_ctrl_done: length=%d\n", reqh->actlen));
+}
+
+/* Deallocate request data structures */
+void
+uhci_bulk_done(ii)
+	uhci_intr_info_t *ii;
+{
+	uhci_softc_t *sc = ii->sc;
+	usbd_request_handle reqh = ii->reqh;
+	struct uhci_pipe *upipe = (struct uhci_pipe *)reqh->pipe;
+	uhci_soft_td_t *std;
+	u_int datalen = upipe->u.bulk.length;
+	usb_dma_t *dma;
+
+	LIST_REMOVE(ii, list);	/* remove from active list */
+
+	uhci_remove_bulk(sc, upipe->u.bulk.sqh);
+
+	/* find the toggle for the last transfer and invert it */
+	for (std = ii->stdstart; std; std = std->td->link.std) {
+		if (std->td->td_status & UHCI_TD_ACTIVE)
+			break;
+		upipe->nexttoggle = UHCI_TD_GET_DT(std->td->td_token);
+	}
+	upipe->nexttoggle ^= 1;
+
+	/* copy the data from dma memory to userland storage */
+	dma = &upipe->u.bulk.datadma;
+	if (upipe->u.bulk.isread)
+		memcpy(reqh->buffer, KERNADDR(dma), datalen);
+	uhci_free_std_chain(sc, ii->stdstart, 0);
+	usb_freemem(sc->sc_dmatag, dma);
+
+	DPRINTFN(4, ("uhci_bulk_done: length=%d\n", reqh->actlen));
+}
+
+/* Add interrupt QH, called with vflock. */
+void
+uhci_add_intr(sc, n, sqh)
+	uhci_softc_t *sc;
+	int n;
+	uhci_soft_qh_t *sqh;
+{
+	struct uhci_vframe *vf = &sc->sc_vframes[n];
+	uhci_qh_t *eqh;
+
+	DPRINTFN(4, ("uhci_add_intr: n=%d sqh=%p\n", n, sqh));
+	eqh = vf->eqh->qh;
+	sqh->qh->hlink     = eqh->hlink;
+	sqh->qh->qh_hlink  = eqh->qh_hlink;
+	eqh->hlink         = sqh;
+	eqh->qh_hlink      = sqh->physaddr | UHCI_PTR_Q;
+	vf->eqh = sqh;
+	vf->bandwidth++;
+}
+
+/* Remove interrupt QH, called with vflock. */
+void
+uhci_remove_intr(sc, n, sqh)
+	uhci_softc_t *sc;
+	int n;
+	uhci_soft_qh_t *sqh;
+{
+	struct uhci_vframe *vf = &sc->sc_vframes[n];
+	uhci_soft_qh_t *pqh;
+
+	DPRINTFN(4, ("uhci_remove_intr: n=%d sqh=%p\n", n, sqh));
+
+	for (pqh = vf->hqh; pqh->qh->hlink != sqh; pqh = pqh->qh->hlink)
+#if defined(DIAGNOSTIC) || defined(USB_DEBUG)		
+		if (pqh->qh->qh_hlink & UHCI_PTR_T) {
+			printf("uhci_remove_intr: QH not found\n");
+			return;
+		}
+#else
+		;
+#endif
+	pqh->qh->hlink    = sqh->qh->hlink;
+	pqh->qh->qh_hlink = sqh->qh->qh_hlink;
+	if (vf->eqh == sqh)
+		vf->eqh = pqh;
+	vf->bandwidth--;
+}
+
+usbd_status
+uhci_device_setintr(sc, upipe, ival)
+	uhci_softc_t *sc;
+	struct uhci_pipe *upipe;
+	int ival;
+{
+	uhci_soft_qh_t *sqh;
+	int i, npoll, s;
+	u_int bestbw, bw, bestoffs, offs;
+
+	DPRINTFN(2, ("uhci_setintr: pipe=%p\n", upipe));
+	if (ival == 0) {
+		printf("uhci_setintr: 0 interval\n");
+		return (USBD_INVAL);
+	}
+
+	if (ival > UHCI_VFRAMELIST_COUNT)
+		ival = UHCI_VFRAMELIST_COUNT;
+	npoll = (UHCI_VFRAMELIST_COUNT + ival - 1) / ival;
+	DPRINTFN(2, ("uhci_setintr: ival=%d npoll=%d\n", ival, npoll));
+
+	upipe->u.intr.npoll = npoll;
+	upipe->u.intr.qhs = 
+		malloc(npoll * sizeof(uhci_soft_qh_t *), M_USBHC, M_WAITOK);
+
+	/* 
+	 * Figure out which offset in the schedule that has most
+	 * bandwidth left over.
+	 */
+#define MOD(i) ((i) & (UHCI_VFRAMELIST_COUNT-1))
+	for (bestoffs = offs = 0, bestbw = ~0; offs < ival; offs++) {
+		for (bw = i = 0; i < npoll; i++)
+			bw += sc->sc_vframes[MOD(i * ival + offs)].bandwidth;
+		if (bw < bestbw) {
+			bestbw = bw;
+			bestoffs = offs;
+		}
+	}
+	DPRINTFN(1, ("uhci_setintr: bw=%d offs=%d\n", bestbw, bestoffs));
+
+	upipe->iinfo->stdstart = 0;
+	for(i = 0; i < npoll; i++) {
+		upipe->u.intr.qhs[i] = sqh = uhci_alloc_sqh(sc);
+		sqh->qh->elink = 0;
+		sqh->qh->qh_elink = UHCI_PTR_T;
+		sqh->pos = MOD(i * ival + bestoffs);
+		sqh->intr_info = upipe->iinfo;
+	}
+#undef MOD
+
+	s = splusb();
+	LIST_INSERT_HEAD(&sc->sc_intrhead, upipe->iinfo, list);
+	splx(s);
+
+	uhci_lock_frames(sc);
+	/* Enter QHs into the controller data structures. */
+	for(i = 0; i < npoll; i++)
+		uhci_add_intr(sc, upipe->u.intr.qhs[i]->pos, 
+			      upipe->u.intr.qhs[i]);
+	uhci_unlock_frames(sc);
+
+	DPRINTFN(5, ("uhci_setintr: returns %p\n", upipe));
+	return (USBD_NORMAL_COMPLETION);
+}
+
+/* Open a new pipe. */
+usbd_status
+uhci_open(pipe)
+	usbd_pipe_handle pipe;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	usb_endpoint_descriptor_t *ed = pipe->endpoint->edesc;
+	usbd_status r;
+
+	DPRINTFN(1, ("uhci_open: pipe=%p, addr=%d, endpt=%d (%d)\n",
+		     pipe, pipe->device->address, 
+		     ed->bEndpointAddress, sc->sc_addr));
+	if (pipe->device->address == sc->sc_addr) {
+		switch (ed->bEndpointAddress) {
+		case USB_CONTROL_ENDPOINT:
+			pipe->methods = &uhci_root_ctrl_methods;
+			break;
+		case UE_IN | UHCI_INTR_ENDPT:
+			pipe->methods = &uhci_root_intr_methods;
+			break;
+		default:
+			return (USBD_INVAL);
+		}
+	} else {
+		upipe->iinfo = uhci_alloc_intr_info(sc);
+		if (upipe->iinfo == 0)
+			return (USBD_NOMEM);
+		switch (ed->bmAttributes & UE_XFERTYPE) {
+		case UE_CONTROL:
+			pipe->methods = &uhci_device_ctrl_methods;
+			upipe->u.ctl.sqh = uhci_alloc_sqh(sc);
+			if (upipe->u.ctl.sqh == 0)
+				goto bad;
+			upipe->u.ctl.setup = uhci_alloc_std(sc);
+			if (upipe->u.ctl.setup == 0) {
+				uhci_free_sqh(sc, upipe->u.ctl.sqh);
+				goto bad;
+			}
+			upipe->u.ctl.stat = uhci_alloc_std(sc);
+			if (upipe->u.ctl.stat == 0) {
+				uhci_free_sqh(sc, upipe->u.ctl.sqh);
+				uhci_free_std(sc, upipe->u.ctl.setup);
+				goto bad;
+			}
+			r = usb_allocmem(sc->sc_dmatag, 
+					 sizeof(usb_device_request_t), 
+					 0, &upipe->u.ctl.reqdma);
+			if (r != USBD_NORMAL_COMPLETION) {
+				uhci_free_sqh(sc, upipe->u.ctl.sqh);
+				uhci_free_std(sc, upipe->u.ctl.setup);
+				uhci_free_std(sc, upipe->u.ctl.stat);
+				goto bad;
+			}
+			break;
+		case UE_INTERRUPT:
+			pipe->methods = &uhci_device_intr_methods;
+			return (uhci_device_setintr(sc, upipe, ed->bInterval));
+		case UE_ISOCHRONOUS:
+			pipe->methods = &uhci_device_isoc_methods;
+			upipe->u.iso.nbuf = 0;
+			return (USBD_NORMAL_COMPLETION);
+		case UE_BULK:
+			pipe->methods = &uhci_device_bulk_methods;
+			upipe->u.bulk.sqh = uhci_alloc_sqh(sc);
+			if (upipe->u.bulk.sqh == 0)
+				goto bad;
+			break;
+		}
+	}
+	return (USBD_NORMAL_COMPLETION);
+
+ bad:
+	uhci_free_intr_info(upipe->iinfo);
+	return (USBD_NOMEM);
+}
+
+/*
+ * Data structures and routines to emulate the root hub.
+ */
+usb_device_descriptor_t uhci_devd = {
+	USB_DEVICE_DESCRIPTOR_SIZE,
+	UDESC_DEVICE,		/* type */
+	{0x00, 0x01},		/* USB version */
+	UCLASS_HUB,		/* class */
+	USUBCLASS_HUB,		/* subclass */
+	0,			/* protocol */
+	64,			/* max packet */
+	{0},{0},{0x00,0x01},	/* device id */
+	1,2,0,			/* string indicies */
+	1			/* # of configurations */
+};
+
+usb_config_descriptor_t uhci_confd = {
+	USB_CONFIG_DESCRIPTOR_SIZE,
+	UDESC_CONFIG,
+	{USB_CONFIG_DESCRIPTOR_SIZE +
+	 USB_INTERFACE_DESCRIPTOR_SIZE +
+	 USB_ENDPOINT_DESCRIPTOR_SIZE},
+	1,
+	1,
+	0,
+	UC_SELF_POWERED,
+	0			/* max power */
+};
+
+usb_interface_descriptor_t uhci_ifcd = {
+	USB_INTERFACE_DESCRIPTOR_SIZE,
+	UDESC_INTERFACE,
+	0,
+	0,
+	1,
+	UCLASS_HUB,
+	USUBCLASS_HUB,
+	0,
+	0
+};
+
+usb_endpoint_descriptor_t uhci_endpd = {
+	USB_ENDPOINT_DESCRIPTOR_SIZE,
+	UDESC_ENDPOINT,
+	UE_IN | UHCI_INTR_ENDPT,
+	UE_INTERRUPT,
+	{8},
+	255
+};
+
+usb_hub_descriptor_t uhci_hubd_piix = {
+	USB_HUB_DESCRIPTOR_SIZE,
+	UDESC_HUB,
+	2,
+	{ UHD_PWR_NO_SWITCH | UHD_OC_INDIVIDUAL, 0 },
+	50,			/* power on to power good */
+	0,
+	{ 0x00 },		/* both ports are removable */
+};
+
+int
+uhci_str(p, l, s)
+	usb_string_descriptor_t *p;
+	int l;
+	char *s;
+{
+	int i;
+
+	if (l == 0)
+		return (0);
+	p->bLength = 2 * strlen(s) + 2;
+	if (l == 1)
+		return (1);
+	p->bDescriptorType = UDESC_STRING;
+	l -= 2;
+	for (i = 0; s[i] && l > 1; i++, l -= 2)
+		USETW2(p->bString[i], 0, s[i]);
+	return (2*i+2);
+}
+
+/*
+ * Simulate a hardware hub by handling all the necessary requests.
+ */
+usbd_status
+uhci_root_ctrl_transfer(reqh)
+	usbd_request_handle reqh;
+{
+	int s;
+	usbd_status r;
+
+	s = splusb();
+	r = usb_insert_transfer(reqh);
+	splx(s);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	else
+		return (uhci_root_ctrl_start(reqh));
+}
+
+usbd_status
+uhci_root_ctrl_start(reqh)
+	usbd_request_handle reqh;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)reqh->pipe->device->bus;
+	usb_device_request_t *req;
+	void *buf;
+	int port, x;
+	int len, value, index, status, change, l, totlen = 0;
+	usb_port_status_t ps;
+	usbd_status r;
+
+	if (!reqh->isreq)
+		panic("uhci_root_ctrl_transfer: not a request\n");
+	req = &reqh->request;
+	buf = reqh->buffer;
+
+	DPRINTFN(2,("uhci_root_ctrl_control type=0x%02x request=%02x\n", 
+		    req->bmRequestType, req->bRequest));
+
+	len = UGETW(req->wLength);
+	value = UGETW(req->wValue);
+	index = UGETW(req->wIndex);
+#define C(x,y) ((x) | ((y) << 8))
+	switch(C(req->bRequest, req->bmRequestType)) {
+	case C(UR_CLEAR_FEATURE, UT_WRITE_DEVICE):
+	case C(UR_CLEAR_FEATURE, UT_WRITE_INTERFACE):
+	case C(UR_CLEAR_FEATURE, UT_WRITE_ENDPOINT):
+		/* 
+		 * DEVICE_REMOTE_WAKEUP and ENDPOINT_HALT are no-ops
+		 * for the integrated root hub.
+		 */
+		break;
+	case C(UR_GET_CONFIG, UT_READ_DEVICE):
+		if (len > 0) {
+			*(u_int8_t *)buf = sc->sc_conf;
+			totlen = 1;
+		}
+		break;
+	case C(UR_GET_DESCRIPTOR, UT_READ_DEVICE):
+		DPRINTFN(2,("uhci_root_ctrl_control wValue=0x%04x\n", value));
+		switch(value >> 8) {
+		case UDESC_DEVICE:
+			if ((value & 0xff) != 0) {
+				r = USBD_IOERROR;
+				goto ret;
+			}
+			totlen = l = min(len, USB_DEVICE_DESCRIPTOR_SIZE);
+			USETW(uhci_devd.idVendor, sc->sc_id_vendor);
+			memcpy(buf, &uhci_devd, l);
+			break;
+		case UDESC_CONFIG:
+			if ((value & 0xff) != 0) {
+				r = USBD_IOERROR;
+				goto ret;
+			}
+			totlen = l = min(len, USB_CONFIG_DESCRIPTOR_SIZE);
+			memcpy(buf, &uhci_confd, l);
+			buf = (char *)buf + l;
+			len -= l;
+			l = min(len, USB_INTERFACE_DESCRIPTOR_SIZE);
+			totlen += l;
+			memcpy(buf, &uhci_ifcd, l);
+			buf = (char *)buf + l;
+			len -= l;
+			l = min(len, USB_ENDPOINT_DESCRIPTOR_SIZE);
+			totlen += l;
+			memcpy(buf, &uhci_endpd, l);
+			break;
+		case UDESC_STRING:
+			if (len == 0)
+				break;
+			*(u_int8_t *)buf = 0;
+			totlen = 1;
+			switch (value & 0xff) {
+			case 1: /* Vendor */
+				totlen = uhci_str(buf, len, sc->sc_vendor);
+				break;
+			case 2: /* Product */
+				totlen = uhci_str(buf, len, "UHCI root hub");
+				break;
+			}
+			break;
+		default:
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		break;
+	case C(UR_GET_INTERFACE, UT_READ_INTERFACE):
+		if (len > 0) {
+			*(u_int8_t *)buf = 0;
+			totlen = 1;
+		}
+		break;
+	case C(UR_GET_STATUS, UT_READ_DEVICE):
+		if (len > 1) {
+			USETW(((usb_status_t *)buf)->wStatus,UDS_SELF_POWERED);
+			totlen = 2;
+		}
+		break;
+	case C(UR_GET_STATUS, UT_READ_INTERFACE):
+	case C(UR_GET_STATUS, UT_READ_ENDPOINT):
+		if (len > 1) {
+			USETW(((usb_status_t *)buf)->wStatus, 0);
+			totlen = 2;
+		}
+		break;
+	case C(UR_SET_ADDRESS, UT_WRITE_DEVICE):
+		if (value >= USB_MAX_DEVICES) {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		sc->sc_addr = value;
+		break;
+	case C(UR_SET_CONFIG, UT_WRITE_DEVICE):
+		if (value != 0 && value != 1) {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		sc->sc_conf = value;
+		break;
+	case C(UR_SET_DESCRIPTOR, UT_WRITE_DEVICE):
+		break;
+	case C(UR_SET_FEATURE, UT_WRITE_DEVICE):
+	case C(UR_SET_FEATURE, UT_WRITE_INTERFACE):
+	case C(UR_SET_FEATURE, UT_WRITE_ENDPOINT):
+		r = USBD_IOERROR;
+		goto ret;
+	case C(UR_SET_INTERFACE, UT_WRITE_INTERFACE):
+		break;
+	case C(UR_SYNCH_FRAME, UT_WRITE_ENDPOINT):
+		break;
+	/* Hub requests */
+	case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_DEVICE):
+		break;
+	case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_OTHER):
+		DPRINTFN(3, ("uhci_root_ctrl_control: UR_CLEAR_PORT_FEATURE "
+			     "port=%d feature=%d\n",
+			     index, value));
+		if (index == 1)
+			port = UHCI_PORTSC1;
+		else if (index == 2)
+			port = UHCI_PORTSC2;
+		else {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		switch(value) {
+		case UHF_PORT_ENABLE:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x & ~UHCI_PORTSC_PE);
+			break;
+		case UHF_PORT_SUSPEND:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x & ~UHCI_PORTSC_SUSP);
+			break;
+		case UHF_PORT_RESET:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x & ~UHCI_PORTSC_PR);
+			break;
+		case UHF_C_PORT_CONNECTION:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x | UHCI_PORTSC_CSC);
+			break;
+		case UHF_C_PORT_ENABLE:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x | UHCI_PORTSC_POEDC);
+			break;
+		case UHF_C_PORT_OVER_CURRENT:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x | UHCI_PORTSC_OCIC);
+			break;
+		case UHF_C_PORT_RESET:
+			sc->sc_isreset = 0;
+			r = USBD_NORMAL_COMPLETION;
+			goto ret;
+		case UHF_PORT_CONNECTION:
+		case UHF_PORT_OVER_CURRENT:
+		case UHF_PORT_POWER:
+		case UHF_PORT_LOW_SPEED:
+		case UHF_C_PORT_SUSPEND:
+		default:
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		break;
+	case C(UR_GET_BUS_STATE, UT_READ_CLASS_OTHER):
+		if (index == 1)
+			port = UHCI_PORTSC1;
+		else if (index == 2)
+			port = UHCI_PORTSC2;
+		else {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		if (len > 0) {
+			*(u_int8_t *)buf = 
+				(UREAD2(sc, port) & UHCI_PORTSC_LS) >>
+				UHCI_PORTSC_LS_SHIFT;
+			totlen = 1;
+		}
+		break;
+	case C(UR_GET_DESCRIPTOR, UT_READ_CLASS_DEVICE):
+		if (value != 0) {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		l = min(len, USB_HUB_DESCRIPTOR_SIZE);
+		totlen = l;
+		memcpy(buf, &uhci_hubd_piix, l);
+		break;
+	case C(UR_GET_STATUS, UT_READ_CLASS_DEVICE):
+		if (len != 4) {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		memset(buf, 0, len);
+		totlen = len;
+		break;
+	case C(UR_GET_STATUS, UT_READ_CLASS_OTHER):
+		if (index == 1)
+			port = UHCI_PORTSC1;
+		else if (index == 2)
+			port = UHCI_PORTSC2;
+		else {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		if (len != 4) {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		x = UREAD2(sc, port);
+		status = change = 0;
+		if (x & UHCI_PORTSC_CCS  )
+			status |= UPS_CURRENT_CONNECT_STATUS;
+		if (x & UHCI_PORTSC_CSC  ) 
+			change |= UPS_C_CONNECT_STATUS;
+		if (x & UHCI_PORTSC_PE   ) 
+			status |= UPS_PORT_ENABLED;
+		if (x & UHCI_PORTSC_POEDC) 
+			change |= UPS_C_PORT_ENABLED;
+		if (x & UHCI_PORTSC_OCI  ) 
+			status |= UPS_OVERCURRENT_INDICATOR;
+		if (x & UHCI_PORTSC_OCIC ) 
+			change |= UPS_C_OVERCURRENT_INDICATOR;
+		if (x & UHCI_PORTSC_SUSP ) 
+			status |= UPS_SUSPEND;
+		if (x & UHCI_PORTSC_LSDA ) 
+			status |= UPS_LOW_SPEED;
+		status |= UPS_PORT_POWER;
+		if (sc->sc_isreset)
+			change |= UPS_C_PORT_RESET;
+		USETW(ps.wPortStatus, status);
+		USETW(ps.wPortChange, change);
+		l = min(len, sizeof ps);
+		memcpy(buf, &ps, l);
+		totlen = l;
+		break;
+	case C(UR_SET_DESCRIPTOR, UT_WRITE_CLASS_DEVICE):
+		r = USBD_IOERROR;
+		goto ret;
+	case C(UR_SET_FEATURE, UT_WRITE_CLASS_DEVICE):
+		break;
+	case C(UR_SET_FEATURE, UT_WRITE_CLASS_OTHER):
+		if (index == 1)
+			port = UHCI_PORTSC1;
+		else if (index == 2)
+			port = UHCI_PORTSC2;
+		else {
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		switch(value) {
+		case UHF_PORT_ENABLE:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x | UHCI_PORTSC_PE);
+			break;
+		case UHF_PORT_SUSPEND:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x | UHCI_PORTSC_SUSP);
+			break;
+		case UHF_PORT_RESET:
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x | UHCI_PORTSC_PR);
+			usb_delay_ms(&sc->sc_bus, 10);
+			UWRITE2(sc, port, x & ~UHCI_PORTSC_PR);
+			delay(100);
+			x = UREAD2(sc, port);
+			UWRITE2(sc, port, x  | UHCI_PORTSC_PE);
+			delay(100);
+			DPRINTFN(3,("uhci port %d reset, status = 0x%04x\n",
+				    index, UREAD2(sc, port)));
+			sc->sc_isreset = 1;
+			break;
+		case UHF_C_PORT_CONNECTION:
+		case UHF_C_PORT_ENABLE:
+		case UHF_C_PORT_OVER_CURRENT:
+		case UHF_PORT_CONNECTION:
+		case UHF_PORT_OVER_CURRENT:
+		case UHF_PORT_POWER:
+		case UHF_PORT_LOW_SPEED:
+		case UHF_C_PORT_SUSPEND:
+		case UHF_C_PORT_RESET:
+		default:
+			r = USBD_IOERROR;
+			goto ret;
+		}
+		break;
+	default:
+		r = USBD_IOERROR;
+		goto ret;
+	}
+	reqh->actlen = totlen;
+	r = USBD_NORMAL_COMPLETION;
+ ret:
+	reqh->status = r;
+	reqh->xfercb(reqh);
+	usb_start_next(reqh->pipe);
+	return (USBD_IN_PROGRESS);
+}
+
+/* Abort a root control request. */
+void
+uhci_root_ctrl_abort(reqh)
+	usbd_request_handle reqh;
+{
+	/* Nothing to do, all transfers are syncronous. */
+}
+
+/* Close the root pipe. */
+void
+uhci_root_ctrl_close(pipe)
+	usbd_pipe_handle pipe;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
+
+	usb_untimeout(uhci_timo, pipe->intrreqh, pipe->intrreqh->timo_handle);
+	sc->sc_has_timo = 0;
+	DPRINTF(("uhci_root_ctrl_close\n"));
+}
+
+/* Abort a root interrupt request. */
+void
+uhci_root_intr_abort(reqh)
+	usbd_request_handle reqh;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)reqh->pipe->device->bus;
+
+	usb_untimeout(uhci_timo, reqh, reqh->timo_handle);
+	sc->sc_has_timo = 0;
+}
+
+usbd_status
+uhci_root_intr_transfer(reqh)
+	usbd_request_handle reqh;
+{
+	int s;
+	usbd_status r;
+
+	s = splusb();
+	r = usb_insert_transfer(reqh);
+	splx(s);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+	else
+		return (uhci_root_intr_start(reqh));
+}
+
+/* Start a transfer on the root interrupt pipe */
+usbd_status
+uhci_root_intr_start(reqh)
+	usbd_request_handle reqh;
+{
+	usbd_pipe_handle pipe = reqh->pipe;
+	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
+	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
+	usb_dma_t *dmap;
+	usbd_status r;
+	int len;
+
+	DPRINTFN(3, ("uhci_root_intr_transfer: reqh=%p buf=%p len=%d "
+		     "flags=%d\n",
+		     reqh, reqh->buffer, reqh->length, reqh->flags));
+
+	len = reqh->length;
+	dmap = &upipe->u.intr.datadma;
+	if (len == 0)
+		return (USBD_INVAL); /* XXX should it be? */
+
+	r = usb_allocmem(sc->sc_dmatag, len, 0, dmap);
+	if (r != USBD_NORMAL_COMPLETION)
+		return (r);
+
+	sc->sc_ival = MS_TO_TICKS(reqh->pipe->endpoint->edesc->bInterval);
+	usb_timeout(uhci_timo, reqh, sc->sc_ival, reqh->timo_handle);
+	sc->sc_has_timo = reqh;
+	return (USBD_IN_PROGRESS);
+}
+
+/* Close the root interrupt pipe. */
+void
+uhci_root_intr_close(pipe)
+	usbd_pipe_handle pipe;
+{
+	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
+
+	usb_untimeout(uhci_timo, pipe->intrreqh, pipe->intrreqh->timo_handle);
+	sc->sc_has_timo = 0;
+	DPRINTF(("uhci_root_intr_close\n"));
+}
+