/*      $OpenBSD: ohci.c,v 1.165 2022/04/12 19:41:11 naddy Exp $ */
/*      $NetBSD: ohci.c,v 1.139 2003/02/22 05:24:16 tsutsui Exp $       */
/*      $FreeBSD: src/sys/dev/usb/ohci.c,v 1.22 1999/11/17 22:33:40 n_hibma 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 (lennart@augustsson.net) 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.
 *
 * 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/malloc.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/timeout.h>
#include <sys/pool.h>
#include <sys/endian.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/ohcireg.h>
#include <dev/usb/ohcivar.h>

struct cfdriver ohci_cd = {
        NULL, "ohci", DV_DULL, CD_SKIPHIBERNATE
};

#ifdef OHCI_DEBUG
#define DPRINTF(x)      do { if (ohcidebug) printf x; } while (0)
#define DPRINTFN(n,x)   do { if (ohcidebug>(n)) printf x; } while (0)
int ohcidebug = 0;
#define bitmask_snprintf(q,f,b,l) snprintf((b), (l), "%b", (q), (f))
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif

struct pool *ohcixfer;

struct ohci_pipe;

struct ohci_soft_ed *ohci_alloc_sed(struct ohci_softc *);
void            ohci_free_sed(struct ohci_softc *, struct ohci_soft_ed *);

struct ohci_soft_td *ohci_alloc_std(struct ohci_softc *);
void            ohci_free_std(struct ohci_softc *, struct ohci_soft_td *);

struct ohci_soft_itd *ohci_alloc_sitd(struct ohci_softc *);
void            ohci_free_sitd(struct ohci_softc *, struct ohci_soft_itd *);

#if 0
void            ohci_free_std_chain(struct ohci_softc *, struct ohci_soft_td *,
                    struct ohci_soft_td *);
#endif
usbd_status     ohci_alloc_std_chain(struct ohci_softc *, u_int,
                    struct usbd_xfer *, struct ohci_soft_td *,
                    struct ohci_soft_td **);

usbd_status     ohci_open(struct usbd_pipe *);
int             ohci_setaddr(struct usbd_device *, int);
void            ohci_poll(struct usbd_bus *);
void            ohci_softintr(void *);
void            ohci_add_done(struct ohci_softc *, ohci_physaddr_t);
void            ohci_rhsc(struct ohci_softc *, struct usbd_xfer *);

usbd_status     ohci_device_request(struct usbd_xfer *xfer);
void            ohci_add_ed(struct ohci_soft_ed *, struct ohci_soft_ed *);
void            ohci_rem_ed(struct ohci_soft_ed *, struct ohci_soft_ed *);
void            ohci_hash_add_td(struct ohci_softc *, struct ohci_soft_td *);
struct ohci_soft_td *ohci_hash_find_td(struct ohci_softc *, ohci_physaddr_t);
void            ohci_hash_add_itd(struct ohci_softc *, struct ohci_soft_itd *);
void            ohci_hash_rem_itd(struct ohci_softc *, struct ohci_soft_itd *);
struct ohci_soft_itd *ohci_hash_find_itd(struct ohci_softc *, ohci_physaddr_t);

usbd_status     ohci_setup_isoc(struct usbd_pipe *pipe);
void            ohci_device_isoc_enter(struct usbd_xfer *);

struct usbd_xfer *ohci_allocx(struct usbd_bus *);
void            ohci_freex(struct usbd_bus *, struct usbd_xfer *);

usbd_status     ohci_root_ctrl_transfer(struct usbd_xfer *);
usbd_status     ohci_root_ctrl_start(struct usbd_xfer *);
void            ohci_root_ctrl_abort(struct usbd_xfer *);
void            ohci_root_ctrl_close(struct usbd_pipe *);
void            ohci_root_ctrl_done(struct usbd_xfer *);

usbd_status     ohci_root_intr_transfer(struct usbd_xfer *);
usbd_status     ohci_root_intr_start(struct usbd_xfer *);
void            ohci_root_intr_abort(struct usbd_xfer *);
void            ohci_root_intr_close(struct usbd_pipe *);
void            ohci_root_intr_done(struct usbd_xfer *);

usbd_status     ohci_device_ctrl_transfer(struct usbd_xfer *);
usbd_status     ohci_device_ctrl_start(struct usbd_xfer *);
void            ohci_device_ctrl_abort(struct usbd_xfer *);
void            ohci_device_ctrl_close(struct usbd_pipe *);
void            ohci_device_ctrl_done(struct usbd_xfer *);

usbd_status     ohci_device_bulk_transfer(struct usbd_xfer *);
usbd_status     ohci_device_bulk_start(struct usbd_xfer *);
void            ohci_device_bulk_abort(struct usbd_xfer *);
void            ohci_device_bulk_close(struct usbd_pipe *);
void            ohci_device_bulk_done(struct usbd_xfer *);

usbd_status     ohci_device_intr_transfer(struct usbd_xfer *);
usbd_status     ohci_device_intr_start(struct usbd_xfer *);
void            ohci_device_intr_abort(struct usbd_xfer *);
void            ohci_device_intr_close(struct usbd_pipe *);
void            ohci_device_intr_done(struct usbd_xfer *);

usbd_status     ohci_device_isoc_transfer(struct usbd_xfer *);
usbd_status     ohci_device_isoc_start(struct usbd_xfer *);
void            ohci_device_isoc_abort(struct usbd_xfer *);
void            ohci_device_isoc_close(struct usbd_pipe *);
void            ohci_device_isoc_done(struct usbd_xfer *);

usbd_status     ohci_device_setintr(struct ohci_softc *sc,
                            struct ohci_pipe *pipe, int ival);

void            ohci_timeout(void *);
void            ohci_timeout_task(void *);
void            ohci_rhsc_able(struct ohci_softc *, int);
void            ohci_rhsc_enable(void *);

void            ohci_close_pipe(struct usbd_pipe *, struct ohci_soft_ed *);
void            ohci_abort_xfer(struct usbd_xfer *, usbd_status);

void            ohci_device_clear_toggle(struct usbd_pipe *pipe);

#ifdef OHCI_DEBUG
void            ohci_dumpregs(struct ohci_softc *);
void            ohci_dump_tds(struct ohci_soft_td *);
void            ohci_dump_td(struct ohci_soft_td *);
void            ohci_dump_ed(struct ohci_soft_ed *);
void            ohci_dump_itd(struct ohci_soft_itd *);
void            ohci_dump_itds(struct ohci_soft_itd *);
#endif

#define OBARR(sc) bus_space_barrier((sc)->iot, (sc)->ioh, 0, (sc)->sc_size, \
                        BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
#define OWRITE1(sc, r, x) \
 do { OBARR(sc); bus_space_write_1((sc)->iot, (sc)->ioh, (r), (x)); } while (0)
#define OWRITE2(sc, r, x) \
 do { OBARR(sc); bus_space_write_2((sc)->iot, (sc)->ioh, (r), (x)); } while (0)
#define OWRITE4(sc, r, x) \
 do { OBARR(sc); bus_space_write_4((sc)->iot, (sc)->ioh, (r), (x)); } while (0)

__unused static __inline u_int8_t
OREAD1(struct ohci_softc *sc, bus_size_t r)
{
        OBARR(sc);
        return bus_space_read_1(sc->iot, sc->ioh, r);
}

__unused static __inline u_int16_t
OREAD2(struct ohci_softc *sc, bus_size_t r)
{
        OBARR(sc);
        return bus_space_read_2(sc->iot, sc->ioh, r);
}

__unused static __inline u_int32_t
OREAD4(struct ohci_softc *sc, bus_size_t r)
{
        OBARR(sc);
        return bus_space_read_4(sc->iot, sc->ioh, r);
}

/* Reverse the bits in a value 0 .. 31 */
const u_int8_t revbits[OHCI_NO_INTRS] =
  { 0x00, 0x10, 0x08, 0x18, 0x04, 0x14, 0x0c, 0x1c,
    0x02, 0x12, 0x0a, 0x1a, 0x06, 0x16, 0x0e, 0x1e,
    0x01, 0x11, 0x09, 0x19, 0x05, 0x15, 0x0d, 0x1d,
    0x03, 0x13, 0x0b, 0x1b, 0x07, 0x17, 0x0f, 0x1f };

struct ohci_pipe {
        struct usbd_pipe pipe;
        struct ohci_soft_ed *sed;
        union {
                struct ohci_soft_td *td;
                struct ohci_soft_itd *itd;
        } tail;
        union {
                /* Control pipe */
                struct {
                        struct usb_dma reqdma;
                } ctl;
                /* Interrupt pipe */
                struct {
                        int nslots;
                        int pos;
                } intr;
                /* Iso pipe */
                struct iso {
                        int next, inuse;
                } iso;
        } u;
};

#define OHCI_INTR_ENDPT 1

const struct usbd_bus_methods ohci_bus_methods = {
        .open_pipe = ohci_open,
        .dev_setaddr = ohci_setaddr,
        .soft_intr = ohci_softintr,
        .do_poll = ohci_poll,
        .allocx = ohci_allocx,
        .freex = ohci_freex,
};

const struct usbd_pipe_methods ohci_root_ctrl_methods = {
        .transfer = ohci_root_ctrl_transfer,
        .start = ohci_root_ctrl_start,
        .abort = ohci_root_ctrl_abort,
        .close = ohci_root_ctrl_close,
        .done = ohci_root_ctrl_done,
};

const struct usbd_pipe_methods ohci_root_intr_methods = {
        .transfer = ohci_root_intr_transfer,
        .start = ohci_root_intr_start,
        .abort = ohci_root_intr_abort,
        .close = ohci_root_intr_close,
        .done = ohci_root_intr_done,
};

const struct usbd_pipe_methods ohci_device_ctrl_methods = {
        .transfer = ohci_device_ctrl_transfer,
        .start = ohci_device_ctrl_start,
        .abort = ohci_device_ctrl_abort,
        .close = ohci_device_ctrl_close,
        .done = ohci_device_ctrl_done,
};

const struct usbd_pipe_methods ohci_device_intr_methods = {
        .transfer = ohci_device_intr_transfer,
        .start = ohci_device_intr_start,
        .abort = ohci_device_intr_abort,
        .close = ohci_device_intr_close,
        .cleartoggle = ohci_device_clear_toggle,
        .done = ohci_device_intr_done,
};

const struct usbd_pipe_methods ohci_device_bulk_methods = {
        .transfer = ohci_device_bulk_transfer,
        .start = ohci_device_bulk_start,
        .abort = ohci_device_bulk_abort,
        .close = ohci_device_bulk_close,
        .cleartoggle = ohci_device_clear_toggle,
        .done = ohci_device_bulk_done,
};

const struct usbd_pipe_methods ohci_device_isoc_methods = {
        .transfer = ohci_device_isoc_transfer,
        .start = ohci_device_isoc_start,
        .abort = ohci_device_isoc_abort,
        .close = ohci_device_isoc_close,
        .done = ohci_device_isoc_done,
};

int
ohci_activate(struct device *self, int act)
{
        struct ohci_softc *sc = (struct ohci_softc *)self;
        u_int32_t reg;
        int rv = 0;

        switch (act) {
        case DVACT_SUSPEND:
                rv = config_activate_children(self, act);
                sc->sc_bus.use_polling++;
                reg = OREAD4(sc, OHCI_CONTROL) & ~OHCI_HCFS_MASK;
                if (sc->sc_control == 0) {
                        /*
                         * Preserve register values, in case that APM BIOS
                         * does not recover them.
                         */
                        sc->sc_control = reg;
                        sc->sc_intre = OREAD4(sc, OHCI_INTERRUPT_ENABLE);
                        sc->sc_ival = OHCI_GET_IVAL(OREAD4(sc,
                            OHCI_FM_INTERVAL));
                }
                reg |= OHCI_HCFS_SUSPEND;
                OWRITE4(sc, OHCI_CONTROL, reg);
                usb_delay_ms(&sc->sc_bus, USB_RESUME_WAIT);
                sc->sc_bus.use_polling--;
                break;
        case DVACT_RESUME:
                sc->sc_bus.use_polling++;

                /* Some broken BIOSes do not recover these values */
                OWRITE4(sc, OHCI_HCCA, DMAADDR(&sc->sc_hccadma, 0));
                OWRITE4(sc, OHCI_CONTROL_HEAD_ED, sc->sc_ctrl_head->physaddr);
                OWRITE4(sc, OHCI_BULK_HEAD_ED, sc->sc_bulk_head->physaddr);
                if (sc->sc_intre)
                        OWRITE4(sc, OHCI_INTERRUPT_ENABLE,
                            sc->sc_intre & (OHCI_ALL_INTRS | OHCI_MIE));
                if (sc->sc_control)
                        reg = sc->sc_control;
                else
                        reg = OREAD4(sc, OHCI_CONTROL);
                reg |= OHCI_HCFS_RESUME;
                OWRITE4(sc, OHCI_CONTROL, reg);
                usb_delay_ms(&sc->sc_bus, USB_RESUME_DELAY);
                reg = (reg & ~OHCI_HCFS_MASK) | OHCI_HCFS_OPERATIONAL;
                OWRITE4(sc, OHCI_CONTROL, reg);

                reg = (OREAD4(sc, OHCI_FM_REMAINING) & OHCI_FIT) ^ OHCI_FIT;
                reg |= OHCI_FSMPS(sc->sc_ival) | sc->sc_ival;
                OWRITE4(sc, OHCI_FM_INTERVAL, reg);
                OWRITE4(sc, OHCI_PERIODIC_START, OHCI_PERIODIC(sc->sc_ival));

                /* Fiddle the No OverCurrent Protection to avoid a chip bug */
                reg = OREAD4(sc, OHCI_RH_DESCRIPTOR_A);
                OWRITE4(sc, OHCI_RH_DESCRIPTOR_A, reg | OHCI_NOCP);
                OWRITE4(sc, OHCI_RH_STATUS, OHCI_LPSC); /* Enable port power */
                usb_delay_ms(&sc->sc_bus, OHCI_ENABLE_POWER_DELAY);
                OWRITE4(sc, OHCI_RH_DESCRIPTOR_A, reg);

                usb_delay_ms(&sc->sc_bus, USB_RESUME_RECOVERY);
                sc->sc_control = sc->sc_intre = sc->sc_ival = 0;
                sc->sc_bus.use_polling--;
                rv = config_activate_children(self, act);
                break;
        case DVACT_POWERDOWN:
                rv = config_activate_children(self, act);
                OWRITE4(sc, OHCI_CONTROL, OHCI_HCFS_RESET);
                break;
        default:
                rv = config_activate_children(self, act);
                break;
        }
        return (rv);
}

int
ohci_detach(struct device *self, int flags)
{
        struct ohci_softc *sc = (struct ohci_softc *)self;
        int rv;

        rv = config_detach_children(self, flags);
        if (rv != 0)
                return (rv);

        timeout_del(&sc->sc_tmo_rhsc);

        usb_delay_ms(&sc->sc_bus, 300); /* XXX let stray task complete */

        /* free data structures XXX */

        return (rv);
}

struct ohci_soft_ed *
ohci_alloc_sed(struct ohci_softc *sc)
{
        struct ohci_soft_ed *sed = NULL;
        usbd_status err;
        int i, offs;
        struct usb_dma dma;
        int s;

        s = splusb();
        if (sc->sc_freeeds == NULL) {
                DPRINTFN(2, ("ohci_alloc_sed: allocating chunk\n"));
                err = usb_allocmem(&sc->sc_bus, OHCI_SED_SIZE * OHCI_SED_CHUNK,
                          OHCI_ED_ALIGN, USB_DMA_COHERENT, &dma);
                if (err)
                        goto out;
                for (i = 0; i < OHCI_SED_CHUNK; i++) {
                        offs = i * OHCI_SED_SIZE;
                        sed = KERNADDR(&dma, offs);
                        sed->physaddr = DMAADDR(&dma, offs);
                        sed->next = sc->sc_freeeds;
                        sc->sc_freeeds = sed;
                }
        }
        sed = sc->sc_freeeds;
        sc->sc_freeeds = sed->next;
        memset(&sed->ed, 0, sizeof(struct ohci_ed));
        sed->next = NULL;

out:
        splx(s);
        return (sed);
}

void
ohci_free_sed(struct ohci_softc *sc, struct ohci_soft_ed *sed)
{
        int s;

        s = splusb();
        sed->next = sc->sc_freeeds;
        sc->sc_freeeds = sed;
        splx(s);
}

struct ohci_soft_td *
ohci_alloc_std(struct ohci_softc *sc)
{
        struct ohci_soft_td *std = NULL;
        usbd_status err;
        int i, offs;
        struct usb_dma dma;
        int s;

        s = splusb();
        if (sc->sc_freetds == NULL) {
                DPRINTFN(2, ("ohci_alloc_std: allocating chunk\n"));
                err = usb_allocmem(&sc->sc_bus, OHCI_STD_SIZE * OHCI_STD_CHUNK,
                          OHCI_TD_ALIGN, USB_DMA_COHERENT, &dma);
                if (err)
                        goto out;
                for (i = 0; i < OHCI_STD_CHUNK; i++) {
                        offs = i * OHCI_STD_SIZE;
                        std = KERNADDR(&dma, offs);
                        std->physaddr = DMAADDR(&dma, offs);
                        std->nexttd = sc->sc_freetds;
                        sc->sc_freetds = std;
                }
        }

        std = sc->sc_freetds;
        sc->sc_freetds = std->nexttd;
        memset(&std->td, 0, sizeof(struct ohci_td));
        std->nexttd = NULL;
        std->xfer = NULL;
        ohci_hash_add_td(sc, std);

out:
        splx(s);
        return (std);
}

void
ohci_free_std(struct ohci_softc *sc, struct ohci_soft_td *std)
{
        int s;

        s = splusb();
        LIST_REMOVE(std, hnext);
        std->nexttd = sc->sc_freetds;
        sc->sc_freetds = std;
        splx(s);
}

usbd_status
ohci_alloc_std_chain(struct ohci_softc *sc, u_int alen, struct usbd_xfer *xfer,
    struct ohci_soft_td *sp, struct ohci_soft_td **ep)
{
        struct ohci_soft_td *next, *cur, *end;
        ohci_physaddr_t dataphys, dataphysend;
        u_int32_t tdflags;
        u_int len, curlen;
        int mps;
        int rd = usbd_xfer_isread(xfer);
        struct usb_dma *dma = &xfer->dmabuf;
        u_int16_t flags = xfer->flags;

        DPRINTFN(alen < 4096,("ohci_alloc_std_chain: start len=%u\n", alen));

        usb_syncmem(&xfer->dmabuf, 0, xfer->length,
            usbd_xfer_isread(xfer) ?
            BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);

        len = alen;
        cur = sp;
        end = NULL;

        dataphys = DMAADDR(dma, 0);
        dataphysend = OHCI_PAGE(dataphys + len - 1);
        tdflags = htole32(
            (rd ? OHCI_TD_IN : OHCI_TD_OUT) |
            (flags & USBD_SHORT_XFER_OK ? OHCI_TD_R : 0) |
            OHCI_TD_NOCC | OHCI_TD_TOGGLE_CARRY | OHCI_TD_NOINTR);
        mps = UGETW(xfer->pipe->endpoint->edesc->wMaxPacketSize);

        while (len > 0) {
                next = ohci_alloc_std(sc);
                if (next == NULL)
                        goto nomem;

                /* The OHCI hardware can handle at most one page crossing. */
                if (OHCI_PAGE(dataphys) == dataphysend ||
                    OHCI_PAGE(dataphys) + OHCI_PAGE_SIZE == dataphysend) {
                        /* we can handle it in this TD */
                        curlen = len;
                } else {
                        /* must use multiple TDs, fill as much as possible. */
                        curlen = 2 * OHCI_PAGE_SIZE -
                                 (dataphys & (OHCI_PAGE_SIZE-1));
                        /* the length must be a multiple of the max size */
                        curlen -= curlen % mps;
#ifdef DIAGNOSTIC
                        if (curlen == 0)
                                panic("ohci_alloc_std: curlen == 0");
#endif
                }
                DPRINTFN(4,("ohci_alloc_std_chain: dataphys=0x%08x "
                            "dataphysend=0x%08x len=%u curlen=%u\n",
                            dataphys, dataphysend,
                            len, curlen));
                len -= curlen;

                cur->td.td_flags = tdflags;
                cur->td.td_cbp = htole32(dataphys);
                cur->nexttd = next;
                cur->td.td_nexttd = htole32(next->physaddr);
                cur->td.td_be = htole32(dataphys + curlen - 1);
                cur->len = curlen;
                cur->flags = OHCI_ADD_LEN;
                cur->xfer = xfer;
                DPRINTFN(10,("ohci_alloc_std_chain: cbp=0x%08x be=0x%08x\n",
                            dataphys, dataphys + curlen - 1));
                DPRINTFN(10,("ohci_alloc_std_chain: extend chain\n"));
                dataphys += curlen;
                end = cur;
                cur = next;
        }
        if (!rd && ((flags & USBD_FORCE_SHORT_XFER) || alen == 0) &&
            alen % mps == 0) {
                /* Force a 0 length transfer at the end. */

                next = ohci_alloc_std(sc);
                if (next == NULL)
                        goto nomem;

                cur->td.td_flags = tdflags;
                cur->td.td_cbp = 0; /* indicate 0 length packet */
                cur->nexttd = next;
                cur->td.td_nexttd = htole32(next->physaddr);
                cur->td.td_be = ~0;
                cur->len = 0;
                cur->flags = 0;
                cur->xfer = xfer;
                DPRINTFN(2,("ohci_alloc_std_chain: add 0 xfer\n"));
                end = cur;
        }
        *ep = end;

        return (USBD_NORMAL_COMPLETION);

 nomem:
        /* XXX free chain */
        return (USBD_NOMEM);
}

#if 0
void
ohci_free_std_chain(struct ohci_softc *sc, struct ohci_soft_td *std,
    struct ohci_soft_td *stdend)
{
        struct ohci_soft_td *p;

        for (; std != stdend; std = p) {
                p = std->nexttd;
                ohci_free_std(sc, std);
        }
}
#endif

struct ohci_soft_itd *
ohci_alloc_sitd(struct ohci_softc *sc)
{
        struct ohci_soft_itd *sitd;
        usbd_status err;
        int i, s, offs;
        struct usb_dma dma;

        if (sc->sc_freeitds == NULL) {
                DPRINTFN(2, ("ohci_alloc_sitd: allocating chunk\n"));
                err = usb_allocmem(&sc->sc_bus, OHCI_SITD_SIZE * OHCI_SITD_CHUNK,
                          OHCI_ITD_ALIGN, USB_DMA_COHERENT, &dma);
                if (err)
                        return (NULL);
                s = splusb();
                for(i = 0; i < OHCI_SITD_CHUNK; i++) {
                        offs = i * OHCI_SITD_SIZE;
                        sitd = KERNADDR(&dma, offs);
                        sitd->physaddr = DMAADDR(&dma, offs);
                        sitd->nextitd = sc->sc_freeitds;
                        sc->sc_freeitds = sitd;
                }
                splx(s);
        }

        s = splusb();
        sitd = sc->sc_freeitds;
        sc->sc_freeitds = sitd->nextitd;
        memset(&sitd->itd, 0, sizeof(struct ohci_itd));
        sitd->nextitd = NULL;
        sitd->xfer = NULL;
        ohci_hash_add_itd(sc, sitd);
        splx(s);

#ifdef DIAGNOSTIC
        sitd->isdone = 0;
#endif

        return (sitd);
}

void
ohci_free_sitd(struct ohci_softc *sc, struct ohci_soft_itd *sitd)
{
        int s;

        DPRINTFN(10,("ohci_free_sitd: sitd=%p\n", sitd));

#ifdef DIAGNOSTIC
        if (!sitd->isdone) {
                panic("ohci_free_sitd: sitd=%p not done", sitd);
                return;
        }
        /* Warn double free */
        sitd->isdone = 0;
#endif

        s = splusb();
        ohci_hash_rem_itd(sc, sitd);
        sitd->nextitd = sc->sc_freeitds;
        sc->sc_freeitds = sitd;
        splx(s);
}

usbd_status
ohci_checkrev(struct ohci_softc *sc)
{
        u_int32_t rev;

        rev = OREAD4(sc, OHCI_REVISION);
        printf("version %d.%d%s\n", OHCI_REV_HI(rev), OHCI_REV_LO(rev),
               OHCI_REV_LEGACY(rev) ? ", legacy support" : "");

        if (OHCI_REV_HI(rev) != 1 || OHCI_REV_LO(rev) != 0) {
                printf("%s: unsupported OHCI revision\n",
                       sc->sc_bus.bdev.dv_xname);
                sc->sc_bus.usbrev = USBREV_UNKNOWN;
                return (USBD_INVAL);
        }
        sc->sc_bus.usbrev = USBREV_1_0;

        return (USBD_NORMAL_COMPLETION);
}

usbd_status
ohci_handover(struct ohci_softc *sc)
{
        u_int32_t s, ctl;
        int i;

        ctl = OREAD4(sc, OHCI_CONTROL);
        if (ctl & OHCI_IR) {
                /* SMM active, request change */
                DPRINTF(("ohci_handover: SMM active, request owner change\n"));
                if ((sc->sc_intre & (OHCI_OC | OHCI_MIE)) == 
                    (OHCI_OC | OHCI_MIE))
                        OWRITE4(sc, OHCI_INTERRUPT_ENABLE, OHCI_MIE);
                s = OREAD4(sc, OHCI_COMMAND_STATUS);
                OWRITE4(sc, OHCI_COMMAND_STATUS, s | OHCI_OCR);
                for (i = 0; i < 100 && (ctl & OHCI_IR); i++) {
                        usb_delay_ms(&sc->sc_bus, 1);
                        ctl = OREAD4(sc, OHCI_CONTROL);
                }
                OWRITE4(sc, OHCI_INTERRUPT_DISABLE, OHCI_MIE);
                if (ctl & OHCI_IR) {
                        printf("%s: SMM does not respond, will reset\n",
                            sc->sc_bus.bdev.dv_xname);
                }
        }

        return (USBD_NORMAL_COMPLETION);
}

usbd_status
ohci_init(struct ohci_softc *sc)
{
        struct ohci_soft_ed *sed, *psed;
        usbd_status err;
        int i;
        u_int32_t ctl, rwc, ival, hcr, fm, per, desca, descb;

        DPRINTF(("ohci_init: start\n"));

        for (i = 0; i < OHCI_HASH_SIZE; i++)
                LIST_INIT(&sc->sc_hash_tds[i]);
        for (i = 0; i < OHCI_HASH_SIZE; i++)
                LIST_INIT(&sc->sc_hash_itds[i]);

        if (ohcixfer == NULL) {
                ohcixfer = malloc(sizeof(struct pool), M_USBHC, M_NOWAIT);
                if (ohcixfer == NULL) {
                        printf("%s: unable to allocate pool descriptor\n",
                            sc->sc_bus.bdev.dv_xname);
                        return (ENOMEM);
                }
                pool_init(ohcixfer, sizeof(struct ohci_xfer), 0, IPL_SOFTUSB,
                    0, "ohcixfer", NULL);
        }

        /* XXX determine alignment by R/W */
        /* Allocate the HCCA area. */
        err = usb_allocmem(&sc->sc_bus, OHCI_HCCA_SIZE, OHCI_HCCA_ALIGN,
            USB_DMA_COHERENT, &sc->sc_hccadma);
        if (err)
                return (err);
        sc->sc_hcca = KERNADDR(&sc->sc_hccadma, 0);
        memset(sc->sc_hcca, 0, OHCI_HCCA_SIZE);

        sc->sc_eintrs = OHCI_NORMAL_INTRS;

        /* Allocate dummy ED that starts the control list. */
        sc->sc_ctrl_head = ohci_alloc_sed(sc);
        if (sc->sc_ctrl_head == NULL) {
                err = USBD_NOMEM;
                goto bad1;
        }
        sc->sc_ctrl_head->ed.ed_flags |= htole32(OHCI_ED_SKIP);

        /* Allocate dummy ED that starts the bulk list. */
        sc->sc_bulk_head = ohci_alloc_sed(sc);
        if (sc->sc_bulk_head == NULL) {
                err = USBD_NOMEM;
                goto bad2;
        }
        sc->sc_bulk_head->ed.ed_flags |= htole32(OHCI_ED_SKIP);

        /* Allocate dummy ED that starts the isochronous list. */
        sc->sc_isoc_head = ohci_alloc_sed(sc);
        if (sc->sc_isoc_head == NULL) {
                err = USBD_NOMEM;
                goto bad3;
        }
        sc->sc_isoc_head->ed.ed_flags |= htole32(OHCI_ED_SKIP);

        /* Allocate all the dummy EDs that make up the interrupt tree. */
        for (i = 0; i < OHCI_NO_EDS; i++) {
                sed = ohci_alloc_sed(sc);
                if (sed == NULL) {
                        while (--i >= 0)
                                ohci_free_sed(sc, sc->sc_eds[i]);
                        err = USBD_NOMEM;
                        goto bad4;
                }
                /* All ED fields are set to 0. */
                sc->sc_eds[i] = sed;
                sed->ed.ed_flags |= htole32(OHCI_ED_SKIP);
                if (i != 0)
                        psed = sc->sc_eds[(i-1) / 2];
                else
                        psed= sc->sc_isoc_head;
                sed->next = psed;
                sed->ed.ed_nexted = htole32(psed->physaddr);
        }
        /*
         * Fill HCCA interrupt table.  The bit reversal is to get
         * the tree set up properly to spread the interrupts.
         */
        for (i = 0; i < OHCI_NO_INTRS; i++)
                sc->sc_hcca->hcca_interrupt_table[revbits[i]] =
                    htole32(sc->sc_eds[OHCI_NO_EDS-OHCI_NO_INTRS+i]->physaddr);

#ifdef OHCI_DEBUG
        if (ohcidebug > 15) {
                for (i = 0; i < OHCI_NO_EDS; i++) {
                        printf("ed#%d ", i);
                        ohci_dump_ed(sc->sc_eds[i]);
                }
                printf("iso ");
                ohci_dump_ed(sc->sc_isoc_head);
        }
#endif
        /* Preserve values programmed by SMM/BIOS but lost over reset. */
        ctl = OREAD4(sc, OHCI_CONTROL);
        rwc = ctl & OHCI_RWC;
        fm = OREAD4(sc, OHCI_FM_INTERVAL);
        desca = OREAD4(sc, OHCI_RH_DESCRIPTOR_A);
        descb = OREAD4(sc, OHCI_RH_DESCRIPTOR_B);

        /* Determine in what context we are running. */
        if (ctl & OHCI_IR) {
                OWRITE4(sc, OHCI_CONTROL, OHCI_HCFS_RESET | rwc);
                goto reset;
#if 0
/* Don't bother trying to reuse the BIOS init, we'll reset it anyway. */
        } else if ((ctl & OHCI_HCFS_MASK) != OHCI_HCFS_RESET) {
                /* BIOS started controller. */
                DPRINTF(("ohci_init: BIOS active\n"));
                if ((ctl & OHCI_HCFS_MASK) != OHCI_HCFS_OPERATIONAL) {
                        OWRITE4(sc, OHCI_CONTROL, OHCI_HCFS_OPERATIONAL | rwc);
                        usb_delay_ms(&sc->sc_bus, USB_RESUME_DELAY);
                }
#endif
        } else {
                DPRINTF(("ohci_init: cold started\n"));
        reset:
                /* Controller was cold started. */
                usb_delay_ms(&sc->sc_bus, USB_BUS_RESET_DELAY);
        }

        /*
         * This reset should not be necessary according to the OHCI spec, but
         * without it some controllers do not start.
         */
        DPRINTF(("%s: resetting\n", sc->sc_bus.bdev.dv_xname));
        OWRITE4(sc, OHCI_CONTROL, OHCI_HCFS_RESET | rwc);
        usb_delay_ms(&sc->sc_bus, USB_BUS_RESET_DELAY);

        /* We now own the host controller and the bus has been reset. */

        OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_HCR); /* Reset HC */
        /* Nominal time for a reset is 10 us. */
        for (i = 0; i < 10; i++) {
                delay(10);
                hcr = OREAD4(sc, OHCI_COMMAND_STATUS) & OHCI_HCR;
                if (!hcr)
                        break;
        }
        if (hcr) {
                printf("%s: reset timeout\n", sc->sc_bus.bdev.dv_xname);
                err = USBD_IOERROR;
                goto bad5;
        }
#ifdef OHCI_DEBUG
        if (ohcidebug > 15)
                ohci_dumpregs(sc);
#endif

        /* The controller is now in SUSPEND state, we have 2ms to finish. */

        /* Set up HC registers. */
        OWRITE4(sc, OHCI_HCCA, DMAADDR(&sc->sc_hccadma, 0));
        OWRITE4(sc, OHCI_CONTROL_HEAD_ED, sc->sc_ctrl_head->physaddr);
        OWRITE4(sc, OHCI_BULK_HEAD_ED, sc->sc_bulk_head->physaddr);
        /* disable all interrupts and then switch on all desired interrupts */
        OWRITE4(sc, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS);
        /* switch on desired functional features */
        ctl = OREAD4(sc, OHCI_CONTROL);
        ctl &= ~(OHCI_CBSR_MASK | OHCI_LES | OHCI_HCFS_MASK | OHCI_IR);
        ctl |= OHCI_PLE | OHCI_IE | OHCI_CLE | OHCI_BLE |
                OHCI_RATIO_1_4 | OHCI_HCFS_OPERATIONAL | rwc;
        /* And finally start it! */
        OWRITE4(sc, OHCI_CONTROL, ctl);

        /*
         * The controller is now OPERATIONAL.  Set a some final
         * registers that should be set earlier, but that the
         * controller ignores when in the SUSPEND state.
         */
        ival = OHCI_GET_IVAL(fm);
        fm = (OREAD4(sc, OHCI_FM_REMAINING) & OHCI_FIT) ^ OHCI_FIT;
        fm |= OHCI_FSMPS(ival) | ival;
        OWRITE4(sc, OHCI_FM_INTERVAL, fm);
        per = OHCI_PERIODIC(ival); /* 90% periodic */
        OWRITE4(sc, OHCI_PERIODIC_START, per);

        /* Fiddle the No OverCurrent Protection bit to avoid chip bug. */
        OWRITE4(sc, OHCI_RH_DESCRIPTOR_A, desca | OHCI_NOCP);
        OWRITE4(sc, OHCI_RH_STATUS, OHCI_LPSC); /* Enable port power */
        usb_delay_ms(&sc->sc_bus, OHCI_ENABLE_POWER_DELAY);
        OWRITE4(sc, OHCI_RH_DESCRIPTOR_A, desca);
        OWRITE4(sc, OHCI_RH_DESCRIPTOR_B, descb);
        usb_delay_ms(&sc->sc_bus, OHCI_GET_POTPGT(desca) * UHD_PWRON_FACTOR);

        /*
         * The AMD756 requires a delay before re-reading the register,
         * otherwise it will occasionally report 0 ports.
         */
        sc->sc_noport = 0;
        for (i = 0; i < 10 && sc->sc_noport == 0; i++) {
                usb_delay_ms(&sc->sc_bus, OHCI_READ_DESC_DELAY);
                sc->sc_noport = OHCI_GET_NDP(OREAD4(sc, OHCI_RH_DESCRIPTOR_A));
        }

#ifdef OHCI_DEBUG
        if (ohcidebug > 5)
                ohci_dumpregs(sc);
#endif

        /* Set up the bus struct. */
        sc->sc_bus.methods = &ohci_bus_methods;
        sc->sc_bus.pipe_size = sizeof(struct ohci_pipe);

        sc->sc_control = sc->sc_intre = 0;

        timeout_set(&sc->sc_tmo_rhsc, ohci_rhsc_enable, sc);

        /* Finally, turn on interrupts. */
        DPRINTFN(1,("ohci_init: enabling\n"));
        OWRITE4(sc, OHCI_INTERRUPT_ENABLE, sc->sc_eintrs | OHCI_MIE);

        return (USBD_NORMAL_COMPLETION);

 bad5:
        for (i = 0; i < OHCI_NO_EDS; i++)
                ohci_free_sed(sc, sc->sc_eds[i]);
 bad4:
        ohci_free_sed(sc, sc->sc_isoc_head);
 bad3:
        ohci_free_sed(sc, sc->sc_bulk_head);
 bad2:
        ohci_free_sed(sc, sc->sc_ctrl_head);
 bad1:
        usb_freemem(&sc->sc_bus, &sc->sc_hccadma);
        return (err);
}

struct usbd_xfer *
ohci_allocx(struct usbd_bus *bus)
{
        return (pool_get(ohcixfer, PR_NOWAIT | PR_ZERO));
}

void
ohci_freex(struct usbd_bus *bus, struct usbd_xfer *xfer)
{
        pool_put(ohcixfer, xfer);
}

#ifdef OHCI_DEBUG
void
ohci_dumpregs(struct ohci_softc *sc)
{
        DPRINTF(("ohci_dumpregs: rev=0x%08x control=0x%08x command=0x%08x\n",
                 OREAD4(sc, OHCI_REVISION),
                 OREAD4(sc, OHCI_CONTROL),
                 OREAD4(sc, OHCI_COMMAND_STATUS)));
        DPRINTF(("               intrstat=0x%08x intre=0x%08x intrd=0x%08x\n",
                 OREAD4(sc, OHCI_INTERRUPT_STATUS),
                 OREAD4(sc, OHCI_INTERRUPT_ENABLE),
                 OREAD4(sc, OHCI_INTERRUPT_DISABLE)));
        DPRINTF(("               hcca=0x%08x percur=0x%08x ctrlhd=0x%08x\n",
                 OREAD4(sc, OHCI_HCCA),
                 OREAD4(sc, OHCI_PERIOD_CURRENT_ED),
                 OREAD4(sc, OHCI_CONTROL_HEAD_ED)));
        DPRINTF(("               ctrlcur=0x%08x bulkhd=0x%08x bulkcur=0x%08x\n",
                 OREAD4(sc, OHCI_CONTROL_CURRENT_ED),
                 OREAD4(sc, OHCI_BULK_HEAD_ED),
                 OREAD4(sc, OHCI_BULK_CURRENT_ED)));
        DPRINTF(("               done=0x%08x fmival=0x%08x fmrem=0x%08x\n",
                 OREAD4(sc, OHCI_DONE_HEAD),
                 OREAD4(sc, OHCI_FM_INTERVAL),
                 OREAD4(sc, OHCI_FM_REMAINING)));
        DPRINTF(("               fmnum=0x%08x perst=0x%08x lsthrs=0x%08x\n",
                 OREAD4(sc, OHCI_FM_NUMBER),
                 OREAD4(sc, OHCI_PERIODIC_START),
                 OREAD4(sc, OHCI_LS_THRESHOLD)));
        DPRINTF(("               desca=0x%08x descb=0x%08x stat=0x%08x\n",
                 OREAD4(sc, OHCI_RH_DESCRIPTOR_A),
                 OREAD4(sc, OHCI_RH_DESCRIPTOR_B),
                 OREAD4(sc, OHCI_RH_STATUS)));
        DPRINTF(("               port1=0x%08x port2=0x%08x\n",
                 OREAD4(sc, OHCI_RH_PORT_STATUS(1)),
                 OREAD4(sc, OHCI_RH_PORT_STATUS(2))));
        DPRINTF(("         HCCA: frame_number=0x%04x done_head=0x%08x\n",
                 letoh32(sc->sc_hcca->hcca_frame_number),
                 letoh32(sc->sc_hcca->hcca_done_head)));
}
#endif

int ohci_intr1(struct ohci_softc *);

int
ohci_intr(void *p)
{
        struct ohci_softc *sc = p;

        if (sc == NULL || sc->sc_bus.dying)
                return (0);

        /* If we get an interrupt while polling, then just ignore it. */
        if (sc->sc_bus.use_polling) {
#ifdef DIAGNOSTIC
                static struct timeval ohci_intr_tv;
                if ((OREAD4(sc, OHCI_INTERRUPT_STATUS) & sc->sc_eintrs) &&
                    usbd_ratecheck(&ohci_intr_tv))
                        DPRINTFN(16,
                            ("ohci_intr: ignored interrupt while polling\n"));
#endif
                return (0);
        }

        return (ohci_intr1(sc));
}

int
ohci_intr1(struct ohci_softc *sc)
{
        u_int32_t intrs, eintrs;
        ohci_physaddr_t done;

        DPRINTFN(14,("ohci_intr1: enter\n"));

        /* In case the interrupt occurs before initialization has completed. */
        if (sc == NULL || sc->sc_hcca == NULL) {
#ifdef DIAGNOSTIC
                printf("ohci_intr: sc->sc_hcca == NULL\n");
#endif
                return (0);
        }

        intrs = 0;
        done = letoh32(sc->sc_hcca->hcca_done_head);
        if (done != 0) {
                if (done & ~OHCI_DONE_INTRS)
                        intrs = OHCI_WDH;
                if (done & OHCI_DONE_INTRS)
                        intrs |= OREAD4(sc, OHCI_INTERRUPT_STATUS);
                sc->sc_hcca->hcca_done_head = 0;
        } else {
                intrs = OREAD4(sc, OHCI_INTERRUPT_STATUS);
                /* If we've flushed out a WDH then reread */
                if (intrs & OHCI_WDH) {
                        done = letoh32(sc->sc_hcca->hcca_done_head);
                        sc->sc_hcca->hcca_done_head = 0;
                }
        }

        if (intrs == 0xffffffff) {
                sc->sc_bus.dying = 1;
                return (0);
        }

        if (!intrs)
                return (0);

        intrs &= ~OHCI_MIE;
        OWRITE4(sc, OHCI_INTERRUPT_STATUS, intrs); /* Acknowledge */
        eintrs = intrs & sc->sc_eintrs;
        if (!eintrs)
                return (0);

        sc->sc_bus.intr_context++;
        sc->sc_bus.no_intrs++;
        DPRINTFN(7, ("ohci_intr: sc=%p intrs=0x%x(0x%x) eintrs=0x%x\n",
                     sc, (u_int)intrs, OREAD4(sc, OHCI_INTERRUPT_STATUS),
                     (u_int)eintrs));

        if (eintrs & OHCI_SO) {
                sc->sc_overrun_cnt++;
                if (usbd_ratecheck(&sc->sc_overrun_ntc)) {
                        printf("%s: %u scheduling overruns\n",
                            sc->sc_bus.bdev.dv_xname, sc->sc_overrun_cnt);
                        sc->sc_overrun_cnt = 0;
                }
                /* XXX do what */
                eintrs &= ~OHCI_SO;
        }
        if (eintrs & OHCI_WDH) {
                ohci_add_done(sc, done &~ OHCI_DONE_INTRS);
                usb_schedsoftintr(&sc->sc_bus);
                eintrs &= ~OHCI_WDH;
        }
        if (eintrs & OHCI_RD) {
                printf("%s: resume detect\n", sc->sc_bus.bdev.dv_xname);
                /* XXX process resume detect */
        }
        if (eintrs & OHCI_UE) {
                printf("%s: unrecoverable error, controller halted\n",
                       sc->sc_bus.bdev.dv_xname);
                OWRITE4(sc, OHCI_CONTROL, OHCI_HCFS_RESET);
                /* XXX what else */
        }
        if (eintrs & OHCI_RHSC) {
                ohci_rhsc(sc, sc->sc_intrxfer);
                /*
                 * Disable RHSC interrupt for now, because it will be
                 * on until the port has been reset.
                 */
                ohci_rhsc_able(sc, 0);
                DPRINTFN(2, ("%s: rhsc interrupt disabled\n",
                             sc->sc_bus.bdev.dv_xname));

                /* Do not allow RHSC interrupts > 1 per second */
                timeout_add_sec(&sc->sc_tmo_rhsc, 1);
                eintrs &= ~OHCI_RHSC;
        }

        sc->sc_bus.intr_context--;

        if (eintrs != 0) {
                /* Block unprocessed interrupts. XXX */
                OWRITE4(sc, OHCI_INTERRUPT_DISABLE, eintrs);
                sc->sc_eintrs &= ~eintrs;
                printf("%s: blocking intrs 0x%x\n",
                       sc->sc_bus.bdev.dv_xname, eintrs);
        }

        return (1);
}

void
ohci_rhsc_able(struct ohci_softc *sc, int on)
{
        DPRINTFN(4, ("ohci_rhsc_able: on=%d\n", on));
        if (on) {
                sc->sc_eintrs |= OHCI_RHSC;
                OWRITE4(sc, OHCI_INTERRUPT_ENABLE, OHCI_RHSC);
        } else {
                sc->sc_eintrs &= ~OHCI_RHSC;
                OWRITE4(sc, OHCI_INTERRUPT_DISABLE, OHCI_RHSC);
        }
}

void
ohci_rhsc_enable(void *v_sc)
{
        struct ohci_softc *sc = v_sc;
        int s;

        if (sc->sc_bus.dying)
                return;

        s = splhardusb();
        ohci_rhsc(sc, sc->sc_intrxfer);
        DPRINTFN(2, ("%s: rhsc interrupt enabled\n",
                     sc->sc_bus.bdev.dv_xname));

        ohci_rhsc_able(sc, 1);
        splx(s);
}

#ifdef OHCI_DEBUG
const char *ohci_cc_strs[] = {
        "NO_ERROR",
        "CRC",
        "BIT_STUFFING",
        "DATA_TOGGLE_MISMATCH",
        "STALL",
        "DEVICE_NOT_RESPONDING",
        "PID_CHECK_FAILURE",
        "UNEXPECTED_PID",
        "DATA_OVERRUN",
        "DATA_UNDERRUN",
        "BUFFER_OVERRUN",
        "BUFFER_UNDERRUN",
        "reserved",
        "reserved",
        "NOT_ACCESSED",
        "NOT_ACCESSED",
};
#endif

void
ohci_add_done(struct ohci_softc *sc, ohci_physaddr_t done)
{
        struct ohci_soft_itd *sitd, *sidone, **ip;
        struct ohci_soft_td *std, *sdone, **p;

        /* Reverse the done list. */
        for (sdone = NULL, sidone = NULL; done != 0; ) {
                std = ohci_hash_find_td(sc, done);
                if (std != NULL) {
                        std->dnext = sdone;
                        done = letoh32(std->td.td_nexttd);
                        sdone = std;
                        DPRINTFN(10,("add TD %p\n", std));
                        continue;
                }
                sitd = ohci_hash_find_itd(sc, done);
                if (sitd != NULL) {
                        sitd->dnext = sidone;
                        done = letoh32(sitd->itd.itd_nextitd);
                        sidone = sitd;
                        DPRINTFN(5,("add ITD %p\n", sitd));
                        continue;
                }
                panic("ohci_add_done: addr 0x%08lx not found", (u_long)done);
        }

        /* sdone & sidone now hold the done lists. */
        /* Put them on the already processed lists. */
        for (p = &sc->sc_sdone; *p != NULL; p = &(*p)->dnext)
                ;
        *p = sdone;
        for (ip = &sc->sc_sidone; *ip != NULL; ip = &(*ip)->dnext)
                ;
        *ip = sidone;
}

void
ohci_softintr(void *v)
{
        struct ohci_softc *sc = v;
        struct ohci_soft_itd *sitd, *sidone, *sitdnext;
        struct ohci_soft_td *std, *sdone, *stdnext;
        struct usbd_xfer *xfer;
        struct ohci_pipe *opipe;
        int len, cc, s;
        int i, j, actlen, iframes, uedir;

        DPRINTFN(10,("ohci_softintr: enter\n"));

        if (sc->sc_bus.dying)
                return;

        sc->sc_bus.intr_context++;

        s = splhardusb();
        sdone = sc->sc_sdone;
        sc->sc_sdone = NULL;
        sidone = sc->sc_sidone;
        sc->sc_sidone = NULL;
        splx(s);

        DPRINTFN(10,("ohci_softintr: sdone=%p sidone=%p\n", sdone, sidone));

#ifdef OHCI_DEBUG
        if (ohcidebug > 10) {
                DPRINTF(("ohci_process_done: TD done:\n"));
                ohci_dump_tds(sdone);
        }
#endif

        for (std = sdone; std; std = stdnext) {
                xfer = std->xfer;
                stdnext = std->dnext;
                DPRINTFN(10, ("ohci_process_done: std=%p xfer=%p hcpriv=%p\n",
                                std, xfer, xfer ? xfer->hcpriv : 0));
                if (xfer == NULL) {
                        /*
                         * xfer == NULL: There seems to be no xfer associated
                         * with this TD. It is tailp that happened to end up on
                         * the done queue.
                         * Shouldn't happen, but some chips are broken(?).
                         */
                        continue;
                }
                if (xfer->status == USBD_CANCELLED ||
                    xfer->status == USBD_TIMEOUT) {
                        DPRINTF(("ohci_process_done: cancel/timeout %p\n",
                                 xfer));
                        /* Handled by abort routine. */
                        continue;
                }
                timeout_del(&xfer->timeout_handle);
                usb_rem_task(xfer->device, &xfer->abort_task);

                len = std->len;
                if (std->td.td_cbp != 0)
                        len -= letoh32(std->td.td_be) -
                            letoh32(std->td.td_cbp) + 1;
                DPRINTFN(10, ("ohci_process_done: len=%d, flags=0x%x\n", len,
                    std->flags));
                if (std->flags & OHCI_ADD_LEN)
                        xfer->actlen += len;

                cc = OHCI_TD_GET_CC(letoh32(std->td.td_flags));
                if (cc == OHCI_CC_NO_ERROR) {
                        int done = (std->flags & OHCI_CALL_DONE);

                        ohci_free_std(sc, std);
                        if (done) {
                                if (xfer->actlen)
                                        usb_syncmem(&xfer->dmabuf, 0,
                                            xfer->actlen,
                                            usbd_xfer_isread(xfer) ?
                                            BUS_DMASYNC_POSTREAD :
                                            BUS_DMASYNC_POSTWRITE);
                                xfer->status = USBD_NORMAL_COMPLETION;
                                s = splusb();
                                usb_transfer_complete(xfer);
                                splx(s);
                        }
                } else {
                        /*
                         * Endpoint is halted.  First unlink all the TDs
                         * belonging to the failed transfer, and then restart
                         * the endpoint.
                         */
                        struct ohci_soft_td *p, *n;
                        opipe = (struct ohci_pipe *)xfer->pipe;

                        DPRINTFN(15,("ohci_process_done: error cc=%d (%s)\n",
                          OHCI_TD_GET_CC(letoh32(std->td.td_flags)),
                          ohci_cc_strs[OHCI_TD_GET_CC(letoh32(std->td.td_flags))]));

                        /* remove TDs */
                        for (p = std; p->xfer == xfer; p = n) {
                                n = p->nexttd;
                                ohci_free_std(sc, p);
                        }

                        /* clear halt */
                        opipe->sed->ed.ed_headp = htole32(p->physaddr);
                        OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_CLF);

                        if (cc == OHCI_CC_STALL)
                                xfer->status = USBD_STALLED;
                        else if (cc == OHCI_CC_DATA_UNDERRUN) {
                                if (xfer->actlen)
                                        usb_syncmem(&xfer->dmabuf, 0,
                                            xfer->actlen,
                                            usbd_xfer_isread(xfer) ?
                                            BUS_DMASYNC_POSTREAD :
                                            BUS_DMASYNC_POSTWRITE);
                                xfer->status = USBD_NORMAL_COMPLETION;
                        } else
                                xfer->status = USBD_IOERROR;
                        s = splusb();
                        usb_transfer_complete(xfer);
                        splx(s);
                }
        }

#ifdef OHCI_DEBUG
        if (ohcidebug > 10) {
                DPRINTF(("ohci_softintr: ITD done:\n"));
                ohci_dump_itds(sidone);
        }
#endif

        for (sitd = sidone; sitd != NULL; sitd = sitdnext) {
                xfer = sitd->xfer;
                sitdnext = sitd->dnext;
                DPRINTFN(1, ("ohci_process_done: sitd=%p xfer=%p hcpriv=%p\n",
                             sitd, xfer, xfer ? xfer->hcpriv : 0));
                if (xfer == NULL)
                        continue;
                if (xfer->status == USBD_CANCELLED ||
                    xfer->status == USBD_TIMEOUT) {
                        DPRINTF(("ohci_process_done: cancel/timeout %p\n",
                                 xfer));
                        /* Handled by abort routine. */
                        continue;
                }
#ifdef DIAGNOSTIC
                if (sitd->isdone)
                        printf("ohci_softintr: sitd=%p is done\n", sitd);
                sitd->isdone = 1;
#endif
                if (sitd->flags & OHCI_CALL_DONE) {
                        struct ohci_soft_itd *next;

                        opipe = (struct ohci_pipe *)xfer->pipe;
                        opipe->u.iso.inuse -= xfer->nframes;
                        uedir = UE_GET_DIR(xfer->pipe->endpoint->edesc->
                            bEndpointAddress);
                        xfer->status = USBD_NORMAL_COMPLETION;
                        actlen = 0;
                        for (i = 0, sitd = xfer->hcpriv; ;
                            sitd = next) {
                                next = sitd->nextitd;
                                if (OHCI_ITD_GET_CC(letoh32(sitd->
                                    itd.itd_flags)) != OHCI_CC_NO_ERROR)
                                        xfer->status = USBD_IOERROR;
                                /* For input, update frlengths with actual */
                                /* XXX anything necessary for output? */
                                if (uedir == UE_DIR_IN &&
                                    xfer->status == USBD_NORMAL_COMPLETION) {
                                        iframes = OHCI_ITD_GET_FC(letoh32(
                                            sitd->itd.itd_flags));
                                        for (j = 0; j < iframes; i++, j++) {
                                                len = letoh16(sitd->
                                                    itd.itd_offset[j]);
                                                if ((OHCI_ITD_PSW_GET_CC(len) &
                                                    OHCI_CC_NOT_ACCESSED_MASK)
                                                    == OHCI_CC_NOT_ACCESSED)
                                                        len = 0;
                                                else
                                                        len = OHCI_ITD_PSW_LENGTH(len);
                                                xfer->frlengths[i] = len;
                                                actlen += len;
                                        }
                                }
                                if (sitd->flags & OHCI_CALL_DONE)
                                        break;
                                ohci_free_sitd(sc, sitd);
                        }
                        ohci_free_sitd(sc, sitd);
                        if (uedir == UE_DIR_IN &&
                            xfer->status == USBD_NORMAL_COMPLETION)
                                xfer->actlen = actlen;
                        xfer->hcpriv = NULL;

                        if (xfer->status == USBD_NORMAL_COMPLETION) {
                                usb_syncmem(&xfer->dmabuf, 0, xfer->length,
                                    usbd_xfer_isread(xfer) ?
                                    BUS_DMASYNC_POSTREAD :
                                    BUS_DMASYNC_POSTWRITE);
                        }

                        s = splusb();
                        usb_transfer_complete(xfer);
                        splx(s);
                }
        }

        if (sc->sc_softwake) {
                sc->sc_softwake = 0;
                wakeup(&sc->sc_softwake);
        }

        sc->sc_bus.intr_context--;
        DPRINTFN(10,("ohci_softintr: done:\n"));
}

void
ohci_device_ctrl_done(struct usbd_xfer *xfer)
{
        DPRINTFN(10,("ohci_device_ctrl_done: xfer=%p\n", xfer));

#ifdef DIAGNOSTIC
        if (!(xfer->rqflags & URQ_REQUEST)) {
                panic("ohci_device_ctrl_done: not a request");
        }
#endif
}

void
ohci_device_intr_done(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        struct ohci_soft_ed *sed = opipe->sed;
        struct ohci_soft_td *data, *tail;


        DPRINTFN(10, ("ohci_device_intr_done: xfer=%p, actlen=%d\n", xfer,
            xfer->actlen));

        if (xfer->pipe->repeat) {
                data = opipe->tail.td;
                tail = ohci_alloc_std(sc);
                if (tail == NULL) {
                        xfer->status = USBD_NOMEM;
                        return;
                }
                tail->xfer = NULL;

                data->td.td_flags = htole32(
                        OHCI_TD_IN | OHCI_TD_NOCC |
                        OHCI_TD_SET_DI(1) | OHCI_TD_TOGGLE_CARRY);
                if (xfer->flags & USBD_SHORT_XFER_OK)
                        data->td.td_flags |= htole32(OHCI_TD_R);
                data->td.td_cbp = htole32(DMAADDR(&xfer->dmabuf, 0));
                data->nexttd = tail;
                data->td.td_nexttd = htole32(tail->physaddr);
                data->td.td_be = htole32(letoh32(data->td.td_cbp) +
                        xfer->length - 1);
                data->len = xfer->length;
                data->xfer = xfer;
                data->flags = OHCI_CALL_DONE | OHCI_ADD_LEN;
                xfer->hcpriv = data;
                xfer->actlen = 0;

                sed->ed.ed_tailp = htole32(tail->physaddr);
                opipe->tail.td = tail;
        }
}

void
ohci_device_bulk_done(struct usbd_xfer *xfer)
{
        DPRINTFN(10, ("ohci_device_bulk_done: xfer=%p, actlen=%d\n", xfer,
            xfer->actlen));
}

void
ohci_rhsc(struct ohci_softc *sc, struct usbd_xfer *xfer)
{
        u_char *p;
        int i, m;
        int hstatus;

        hstatus = OREAD4(sc, OHCI_RH_STATUS);
        DPRINTF(("ohci_rhsc: sc=%p xfer=%p hstatus=0x%08x\n",
                 sc, xfer, hstatus));

        if (xfer == NULL) {
                /* Just ignore the change. */
                return;
        }

        p = KERNADDR(&xfer->dmabuf, 0);
        m = min(sc->sc_noport, xfer->length * 8 - 1);
        memset(p, 0, xfer->length);
        for (i = 1; i <= m; i++) {
                /* Pick out CHANGE bits from the status reg. */
                if (OREAD4(sc, OHCI_RH_PORT_STATUS(i)) >> 16)
                        p[i/8] |= 1 << (i%8);
        }
        DPRINTF(("ohci_rhsc: change=0x%02x\n", *p));
        xfer->actlen = xfer->length;
        xfer->status = USBD_NORMAL_COMPLETION;

        usb_transfer_complete(xfer);
}

void
ohci_root_intr_done(struct usbd_xfer *xfer)
{
}

void
ohci_root_ctrl_done(struct usbd_xfer *xfer)
{
}

void
ohci_poll(struct usbd_bus *bus)
{
        struct ohci_softc *sc = (struct ohci_softc *)bus;
#ifdef OHCI_DEBUG
        static int last;
        int new;
        new = OREAD4(sc, OHCI_INTERRUPT_STATUS);
        if (new != last) {
                DPRINTFN(10,("ohci_poll: intrs=0x%04x\n", new));
                last = new;
        }
#endif

        if (OREAD4(sc, OHCI_INTERRUPT_STATUS) & sc->sc_eintrs)
                ohci_intr1(sc);
}

usbd_status
ohci_device_request(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        usb_device_request_t *req = &xfer->request;
        struct ohci_soft_td *setup, *stat, *next, *tail;
        struct ohci_soft_ed *sed;
        u_int len;
        usbd_status err;
        int s;

        len = UGETW(req->wLength);

        DPRINTFN(3,("ohci_device_control type=0x%02x, request=0x%02x, "
                    "wValue=0x%04x, wIndex=0x%04x len=%u, addr=%d, endpt=%d\n",
                    req->bmRequestType, req->bRequest, UGETW(req->wValue),
                    UGETW(req->wIndex), len, xfer->device->address,
                    xfer->pipe->endpoint->edesc->bEndpointAddress));

        setup = opipe->tail.td;
        stat = ohci_alloc_std(sc);
        if (stat == NULL) {
                err = USBD_NOMEM;
                goto bad1;
        }
        tail = ohci_alloc_std(sc);
        if (tail == NULL) {
                err = USBD_NOMEM;
                goto bad2;
        }
        tail->xfer = NULL;

        sed = opipe->sed;

        next = stat;

        /* Set up data transaction */
        if (len != 0) {
                struct ohci_soft_td *std = stat;

                err = ohci_alloc_std_chain(sc, len, xfer, std, &stat);
                stat = stat->nexttd; /* point at free TD */
                if (err)
                        goto bad3;
                /* Start toggle at 1 and then use the carried toggle. */
                std->td.td_flags &= htole32(~OHCI_TD_TOGGLE_MASK);
                std->td.td_flags |= htole32(OHCI_TD_TOGGLE_1);
        }

        memcpy(KERNADDR(&opipe->u.ctl.reqdma, 0), req, sizeof *req);

        setup->td.td_flags = htole32(OHCI_TD_SETUP | OHCI_TD_NOCC |
                                     OHCI_TD_TOGGLE_0 | OHCI_TD_NOINTR);
        setup->td.td_cbp = htole32(DMAADDR(&opipe->u.ctl.reqdma, 0));
        setup->nexttd = next;
        setup->td.td_nexttd = htole32(next->physaddr);
        setup->td.td_be = htole32(letoh32(setup->td.td_cbp) + sizeof *req - 1);
        setup->len = 0;
        setup->xfer = xfer;
        setup->flags = 0;
        xfer->hcpriv = setup;

        stat->td.td_flags = htole32(
                (usbd_xfer_isread(xfer) ? OHCI_TD_OUT : OHCI_TD_IN) |
                OHCI_TD_NOCC | OHCI_TD_TOGGLE_1 | OHCI_TD_SET_DI(1));
        stat->td.td_cbp = 0;
        stat->nexttd = tail;
        stat->td.td_nexttd = htole32(tail->physaddr);
        stat->td.td_be = 0;
        stat->flags = OHCI_CALL_DONE;
        stat->len = 0;
        stat->xfer = xfer;

#ifdef OHCI_DEBUG
        if (ohcidebug > 5) {
                DPRINTF(("ohci_device_request:\n"));
                ohci_dump_ed(sed);
                ohci_dump_tds(setup);
        }
#endif

        /* Insert ED in schedule */
        s = splusb();
        sed->ed.ed_tailp = htole32(tail->physaddr);
        opipe->tail.td = tail;
        OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_CLF);
        if (xfer->timeout && !sc->sc_bus.use_polling) {
                timeout_del(&xfer->timeout_handle);
                timeout_set(&xfer->timeout_handle, ohci_timeout, xfer);
                timeout_add_msec(&xfer->timeout_handle, xfer->timeout);
        }
        splx(s);

#ifdef OHCI_DEBUG
        if (ohcidebug > 20) {
                delay(10000);
                DPRINTF(("ohci_device_request: status=%x\n",
                         OREAD4(sc, OHCI_COMMAND_STATUS)));
                ohci_dumpregs(sc);
                printf("ctrl head:\n");
                ohci_dump_ed(sc->sc_ctrl_head);
                printf("sed:\n");
                ohci_dump_ed(sed);
                ohci_dump_tds(setup);
        }
#endif

        return (USBD_NORMAL_COMPLETION);

 bad3:
        ohci_free_std(sc, tail);
 bad2:
        ohci_free_std(sc, stat);
 bad1:
        return (err);
}

/*
 * Add an ED to the schedule.  Called at splusb().
 */
void
ohci_add_ed(struct ohci_soft_ed *sed, struct ohci_soft_ed *head)
{
        DPRINTFN(8,("ohci_add_ed: sed=%p head=%p\n", sed, head));

        splsoftassert(IPL_SOFTUSB);
        sed->next = head->next;
        sed->ed.ed_nexted = head->ed.ed_nexted;
        head->next = sed;
        head->ed.ed_nexted = htole32(sed->physaddr);
}

/*
 * Remove an ED from the schedule.  Called at splusb().
 */
void
ohci_rem_ed(struct ohci_soft_ed *sed, struct ohci_soft_ed *head)
{
        struct ohci_soft_ed *p;

        splsoftassert(IPL_SOFTUSB);

        /* XXX */
        for (p = head; p != NULL && p->next != sed; p = p->next)
                ;
        if (p == NULL)
                panic("ohci_rem_ed: ED not found");
        p->next = sed->next;
        p->ed.ed_nexted = sed->ed.ed_nexted;
}

/*
 * When a transfer is completed the TD is added to the done queue by
 * the host controller.  This queue is the processed by software.
 * Unfortunately the queue contains the physical address of the TD
 * and we have no simple way to translate this back to a kernel address.
 * To make the translation possible (and fast) we use a hash table of
 * TDs currently in the schedule.  The physical address is used as the
 * hash value.
 */

#define HASH(a) (((a) >> 4) % OHCI_HASH_SIZE)
/* Called at splusb() */
void
ohci_hash_add_td(struct ohci_softc *sc, struct ohci_soft_td *std)
{
        int h = HASH(std->physaddr);

        splsoftassert(IPL_SOFTUSB);

        LIST_INSERT_HEAD(&sc->sc_hash_tds[h], std, hnext);
}

struct ohci_soft_td *
ohci_hash_find_td(struct ohci_softc *sc, ohci_physaddr_t a)
{
        int h = HASH(a);
        struct ohci_soft_td *std;

        for (std = LIST_FIRST(&sc->sc_hash_tds[h]);
             std != NULL;
             std = LIST_NEXT(std, hnext))
                if (std->physaddr == a)
                        return (std);
        return (NULL);
}

/* Called at splusb() */
void
ohci_hash_add_itd(struct ohci_softc *sc, struct ohci_soft_itd *sitd)
{
        int h = HASH(sitd->physaddr);

        splsoftassert(IPL_SOFTUSB);

        DPRINTFN(10,("ohci_hash_add_itd: sitd=%p physaddr=0x%08lx\n",
                    sitd, (u_long)sitd->physaddr));

        LIST_INSERT_HEAD(&sc->sc_hash_itds[h], sitd, hnext);
}

/* Called at splusb() */
void
ohci_hash_rem_itd(struct ohci_softc *sc, struct ohci_soft_itd *sitd)
{
        splsoftassert(IPL_SOFTUSB);

        DPRINTFN(10,("ohci_hash_rem_itd: sitd=%p physaddr=0x%08lx\n",
                    sitd, (u_long)sitd->physaddr));

        LIST_REMOVE(sitd, hnext);
}

struct ohci_soft_itd *
ohci_hash_find_itd(struct ohci_softc *sc, ohci_physaddr_t a)
{
        int h = HASH(a);
        struct ohci_soft_itd *sitd;

        for (sitd = LIST_FIRST(&sc->sc_hash_itds[h]);
             sitd != NULL;
             sitd = LIST_NEXT(sitd, hnext))
                if (sitd->physaddr == a)
                        return (sitd);
        return (NULL);
}

void
ohci_timeout(void *addr)
{
        struct usbd_xfer *xfer = addr;
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;

        if (sc->sc_bus.dying) {
                ohci_timeout_task(addr);
                return;
        }

        usb_init_task(&xfer->abort_task, ohci_timeout_task, addr,
            USB_TASK_TYPE_ABORT);
        usb_add_task(xfer->device, &xfer->abort_task);
}

void
ohci_timeout_task(void *addr)
{
        struct usbd_xfer *xfer = addr;
        int s;

        DPRINTF(("%s: xfer=%p\n", __func__, xfer));

        s = splusb();
        ohci_abort_xfer(xfer, USBD_TIMEOUT);
        splx(s);
}

#ifdef OHCI_DEBUG
void
ohci_dump_tds(struct ohci_soft_td *std)
{
        for (; std; std = std->nexttd)
                ohci_dump_td(std);
}

void
ohci_dump_td(struct ohci_soft_td *std)
{
        char sbuf[128];

        bitmask_snprintf((u_int32_t)letoh32(std->td.td_flags),
                         "\20\23R\24OUT\25IN\31TOG1\32SETTOGGLE",
                         sbuf, sizeof(sbuf));

        printf("TD(%p) at %08lx: %s delay=%d ec=%d cc=%d\ncbp=0x%08lx "
               "nexttd=0x%08lx be=0x%08lx\n",
               std, (u_long)std->physaddr, sbuf,
               OHCI_TD_GET_DI(letoh32(std->td.td_flags)),
               OHCI_TD_GET_EC(letoh32(std->td.td_flags)),
               OHCI_TD_GET_CC(letoh32(std->td.td_flags)),
               (u_long)letoh32(std->td.td_cbp),
               (u_long)letoh32(std->td.td_nexttd),
               (u_long)letoh32(std->td.td_be));
}

void
ohci_dump_itd(struct ohci_soft_itd *sitd)
{
        int i;

        printf("ITD(%p) at %08lx: sf=%d di=%d fc=%d cc=%d\n"
               "bp0=0x%08lx next=0x%08lx be=0x%08lx\n",
               sitd, (u_long)sitd->physaddr,
               OHCI_ITD_GET_SF(letoh32(sitd->itd.itd_flags)),
               OHCI_ITD_GET_DI(letoh32(sitd->itd.itd_flags)),
               OHCI_ITD_GET_FC(letoh32(sitd->itd.itd_flags)),
               OHCI_ITD_GET_CC(letoh32(sitd->itd.itd_flags)),
               (u_long)letoh32(sitd->itd.itd_bp0),
               (u_long)letoh32(sitd->itd.itd_nextitd),
               (u_long)letoh32(sitd->itd.itd_be));
        for (i = 0; i < OHCI_ITD_NOFFSET; i++)
                printf("offs[%d]=0x%04x ", i,
                       (u_int)letoh16(sitd->itd.itd_offset[i]));
        printf("\n");
}

void
ohci_dump_itds(struct ohci_soft_itd *sitd)
{
        for (; sitd; sitd = sitd->nextitd)
                ohci_dump_itd(sitd);
}

void
ohci_dump_ed(struct ohci_soft_ed *sed)
{
        char sbuf[128], sbuf2[128];

        bitmask_snprintf((u_int32_t)letoh32(sed->ed.ed_flags),
                         "\20\14OUT\15IN\16LOWSPEED\17SKIP\20ISO",
                         sbuf, sizeof(sbuf));
        bitmask_snprintf((u_int32_t)letoh32(sed->ed.ed_headp),
                         "\20\1HALT\2CARRY", sbuf2, sizeof(sbuf2));

        printf("ED(%p) at 0x%08lx: addr=%d endpt=%d maxp=%d flags=%s\n"
               "tailp=0x%08lx headflags=%s headp=0x%08lx nexted=0x%08lx\n",
               sed, (u_long)sed->physaddr,
               OHCI_ED_GET_FA(letoh32(sed->ed.ed_flags)),
               OHCI_ED_GET_EN(letoh32(sed->ed.ed_flags)),
               OHCI_ED_GET_MAXP(letoh32(sed->ed.ed_flags)), sbuf,
               (u_long)letoh32(sed->ed.ed_tailp), sbuf2,
               (u_long)letoh32(sed->ed.ed_headp),
               (u_long)letoh32(sed->ed.ed_nexted));
}
#endif

usbd_status
ohci_open(struct usbd_pipe *pipe)
{
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;
        usb_endpoint_descriptor_t *ed = pipe->endpoint->edesc;
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        u_int8_t xfertype = UE_GET_XFERTYPE(ed->bmAttributes);
        struct ohci_soft_ed *sed = NULL;
        struct ohci_soft_td *std = NULL;
        struct ohci_soft_itd *sitd;
        ohci_physaddr_t tdphys;
        u_int32_t fmt;
        usbd_status err;
        int s;
        int ival;

        DPRINTFN(1, ("ohci_open: pipe=%p, addr=%d, endpt=%d\n",
                     pipe, pipe->device->address, ed->bEndpointAddress));

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

        /* Root Hub */
        if (pipe->device->depth == 0) {
                switch (ed->bEndpointAddress) {
                case USB_CONTROL_ENDPOINT:
                        pipe->methods = &ohci_root_ctrl_methods;
                        break;
                case UE_DIR_IN | OHCI_INTR_ENDPT:
                        pipe->methods = &ohci_root_intr_methods;
                        break;
                default:
                        return (USBD_INVAL);
                }
        } else {
                sed = ohci_alloc_sed(sc);
                if (sed == NULL)
                        goto bad0;
                opipe->sed = sed;
                if (xfertype == UE_ISOCHRONOUS) {
                        sitd = ohci_alloc_sitd(sc);
                        if (sitd == NULL)
                                goto bad1;
                        opipe->tail.itd = sitd;
                        tdphys = sitd->physaddr;
                        fmt = OHCI_ED_FORMAT_ISO;
                        if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN)
                                fmt |= OHCI_ED_DIR_IN;
                        else
                                fmt |= OHCI_ED_DIR_OUT;
                } else {
                        std = ohci_alloc_std(sc);
                        if (std == NULL)
                                goto bad1;
                        opipe->tail.td = std;
                        tdphys = std->physaddr;
                        fmt = OHCI_ED_FORMAT_GEN | OHCI_ED_DIR_TD;
                }
                sed->ed.ed_flags = htole32(
                        OHCI_ED_SET_FA(pipe->device->address) |
                        OHCI_ED_SET_EN(UE_GET_ADDR(ed->bEndpointAddress)) |
                        (pipe->device->speed == USB_SPEED_LOW ?
                             OHCI_ED_SPEED : 0) |
                        fmt | OHCI_ED_SET_MAXP(UGETW(ed->wMaxPacketSize)));
                sed->ed.ed_headp = htole32(tdphys |
                    (pipe->endpoint->savedtoggle ? OHCI_TOGGLECARRY : 0));
                sed->ed.ed_tailp = htole32(tdphys);

                switch (xfertype) {
                case UE_CONTROL:
                        pipe->methods = &ohci_device_ctrl_methods;
                        err = usb_allocmem(&sc->sc_bus,
                                  sizeof(usb_device_request_t),
                                  0, USB_DMA_COHERENT,
                                  &opipe->u.ctl.reqdma);
                        if (err)
                                goto bad;
                        s = splusb();
                        ohci_add_ed(sed, sc->sc_ctrl_head);
                        splx(s);
                        break;
                case UE_INTERRUPT:
                        pipe->methods = &ohci_device_intr_methods;
                        ival = pipe->interval;
                        if (ival == USBD_DEFAULT_INTERVAL)
                                ival = ed->bInterval;
                        return (ohci_device_setintr(sc, opipe, ival));
                case UE_ISOCHRONOUS:
                        pipe->methods = &ohci_device_isoc_methods;
                        return (ohci_setup_isoc(pipe));
                case UE_BULK:
                        pipe->methods = &ohci_device_bulk_methods;
                        s = splusb();
                        ohci_add_ed(sed, sc->sc_bulk_head);
                        splx(s);
                        break;
                }
        }
        return (USBD_NORMAL_COMPLETION);

 bad:
        if (std != NULL)
                ohci_free_std(sc, std);
 bad1:
        if (sed != NULL)
                ohci_free_sed(sc, sed);
 bad0:
        return (USBD_NOMEM);

}

/*
 * Work around the half configured control (default) pipe when setting
 * the address of a device.
 *
 * Because a single ED is setup per endpoint in ohci_open(), and the
 * control pipe is configured before we could have set the address
 * of the device or read the wMaxPacketSize of the endpoint, we have
 * to re-open the pipe twice here.
 */
int
ohci_setaddr(struct usbd_device *dev, int addr)
{
        /* Root Hub */
        if (dev->depth == 0)
                return (0);

        /* Re-establish the default pipe with the new max packet size. */
        ohci_device_ctrl_close(dev->default_pipe);
        if (ohci_open(dev->default_pipe))
                return (EINVAL);

        if (usbd_set_address(dev, addr))
                return (1);

        dev->address = addr;

        /* Re-establish the default pipe with the new address. */
        ohci_device_ctrl_close(dev->default_pipe);
        if (ohci_open(dev->default_pipe))
                return (EINVAL);

        return (0);
}

/*
 * Close a regular pipe.
 * Assumes that there are no pending transactions.
 */
void
ohci_close_pipe(struct usbd_pipe *pipe, struct ohci_soft_ed *head)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;
        struct ohci_soft_ed *sed = opipe->sed;
        int s;

        s = splusb();
#ifdef DIAGNOSTIC
        sed->ed.ed_flags |= htole32(OHCI_ED_SKIP);
        if ((letoh32(sed->ed.ed_tailp) & OHCI_HEADMASK) !=
            (letoh32(sed->ed.ed_headp) & OHCI_HEADMASK)) {
                struct ohci_soft_td *std;
                std = ohci_hash_find_td(sc, letoh32(sed->ed.ed_headp));
                printf("ohci_close_pipe: pipe not empty sed=%p hd=0x%x "
                       "tl=0x%x pipe=%p, std=%p\n", sed,
                       (int)letoh32(sed->ed.ed_headp),
                       (int)letoh32(sed->ed.ed_tailp),
                       pipe, std);
#ifdef OHCI_DEBUG
                ohci_dump_ed(sed);
                if (std)
                        ohci_dump_td(std);
#endif
                usb_delay_ms(&sc->sc_bus, 2);
                if ((letoh32(sed->ed.ed_tailp) & OHCI_HEADMASK) !=
                    (letoh32(sed->ed.ed_headp) & OHCI_HEADMASK))
                        printf("ohci_close_pipe: pipe still not empty\n");
        }
#endif
        ohci_rem_ed(sed, head);
        /* Make sure the host controller is not touching this ED */
        usb_delay_ms(&sc->sc_bus, 1);
        splx(s);
        pipe->endpoint->savedtoggle =
            (letoh32(sed->ed.ed_headp) & OHCI_TOGGLECARRY) ? 1 : 0;
        ohci_free_sed(sc, opipe->sed);
}

/*
 * Abort a device request.
 * If this routine is called at splusb() it guarantees that the request
 * will be removed from the hardware scheduling and that the callback
 * for it will be called with USBD_CANCELLED status.
 * It's impossible to guarantee that the requested transfer will not
 * have happened since the hardware runs concurrently.
 * If the transaction has already happened we rely on the ordinary
 * interrupt processing to process it.
 */
void
ohci_abort_xfer(struct usbd_xfer *xfer, usbd_status status)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_soft_ed *sed = opipe->sed;
        struct ohci_soft_td *p, *n;
        ohci_physaddr_t headp;
        int s, hit;

        DPRINTF(("ohci_abort_xfer: xfer=%p pipe=%p sed=%p\n", xfer, opipe,
                 sed));

        if (sc->sc_bus.dying) {
                /* If we're dying, just do the software part. */
                s = splusb();
                xfer->status = status;  /* make software ignore it */
                timeout_del(&xfer->timeout_handle);
                usb_rem_task(xfer->device, &xfer->abort_task);
                usb_transfer_complete(xfer);
                splx(s);
                return;
        }

        if (xfer->device->bus->intr_context || !curproc)
                panic("ohci_abort_xfer: not in process context");

        /*
         * Step 1: Make interrupt routine and hardware ignore xfer.
         */
        s = splusb();
        xfer->status = status;  /* make software ignore it */
        timeout_del(&xfer->timeout_handle);
        usb_rem_task(xfer->device, &xfer->abort_task);
        splx(s);
        DPRINTFN(1,("ohci_abort_xfer: stop ed=%p\n", sed));
        sed->ed.ed_flags |= htole32(OHCI_ED_SKIP); /* force hardware skip */

        /*
         * Step 2: Wait until we know hardware has finished any possible
         * use of the xfer.  Also make sure the soft interrupt routine
         * has run.
         */
        usb_delay_ms(xfer->device->bus, 20); /* Hardware finishes in 1ms */
        s = splusb();
        sc->sc_softwake = 1;
        usb_schedsoftintr(&sc->sc_bus);
        tsleep_nsec(&sc->sc_softwake, PZERO, "ohciab", INFSLP);
        splx(s);

        /*
         * Step 3: Remove any vestiges of the xfer from the hardware.
         * The complication here is that the hardware may have executed
         * beyond the xfer we're trying to abort.  So as we're scanning
         * the TDs of this xfer we check if the hardware points to
         * any of them.
         */
        s = splusb();           /* XXX why? */
        p = xfer->hcpriv;
#ifdef DIAGNOSTIC
        if (p == NULL) {
                splx(s);
                printf("ohci_abort_xfer: hcpriv is NULL\n");
                return;
        }
#endif
#ifdef OHCI_DEBUG
        if (ohcidebug > 1) {
                DPRINTF(("ohci_abort_xfer: sed=\n"));
                ohci_dump_ed(sed);
                ohci_dump_tds(p);
        }
#endif
        headp = letoh32(sed->ed.ed_headp) & OHCI_HEADMASK;
        hit = 0;
        for (; p->xfer == xfer; p = n) {
                hit |= headp == p->physaddr;
                n = p->nexttd;
                if (OHCI_TD_GET_CC(letoh32(p->td.td_flags)) ==
                    OHCI_CC_NOT_ACCESSED)
                        ohci_free_std(sc, p);
        }
        /* Zap headp register if hardware pointed inside the xfer. */
        if (hit) {
                DPRINTFN(1,("ohci_abort_xfer: set hd=0x%08x, tl=0x%08x\n",
                            (int)p->physaddr, (int)letoh32(sed->ed.ed_tailp)));
                sed->ed.ed_headp = htole32(p->physaddr); /* unlink TDs */
        } else {
                DPRINTFN(1,("ohci_abort_xfer: no hit\n"));
        }

        /*
         * Step 4: Turn on hardware again.
         */
        sed->ed.ed_flags &= htole32(~OHCI_ED_SKIP); /* remove hardware skip */

        /*
         * Step 5: Execute callback.
         */
        usb_transfer_complete(xfer);

        splx(s);
}

/*
 * Data structures and routines to emulate the root hub.
 */
const usb_device_descriptor_t ohci_devd = {
        USB_DEVICE_DESCRIPTOR_SIZE,
        UDESC_DEVICE,           /* type */
        {0x00, 0x01},           /* USB version */
        UDCLASS_HUB,            /* class */
        UDSUBCLASS_HUB,         /* subclass */
        UDPROTO_FSHUB,
        64,                     /* max packet */
        {0},{0},{0x00,0x01},    /* device id */
        1,2,0,                  /* string indices */
        1                       /* # of configurations */
};

const usb_config_descriptor_t ohci_confd = {
        USB_CONFIG_DESCRIPTOR_SIZE,
        UDESC_CONFIG,
        {USB_CONFIG_DESCRIPTOR_SIZE +
         USB_INTERFACE_DESCRIPTOR_SIZE +
         USB_ENDPOINT_DESCRIPTOR_SIZE},
        1,
        1,
        0,
        UC_BUS_POWERED | UC_SELF_POWERED,
        0                       /* max power */
};

const usb_interface_descriptor_t ohci_ifcd = {
        USB_INTERFACE_DESCRIPTOR_SIZE,
        UDESC_INTERFACE,
        0,
        0,
        1,
        UICLASS_HUB,
        UISUBCLASS_HUB,
        UIPROTO_FSHUB,
        0
};

const usb_endpoint_descriptor_t ohci_endpd = {
        USB_ENDPOINT_DESCRIPTOR_SIZE,
        UDESC_ENDPOINT,
        UE_DIR_IN | OHCI_INTR_ENDPT,
        UE_INTERRUPT,
        {8, 0},                 /* max packet */
        255
};

const usb_hub_descriptor_t ohci_hubd = {
        USB_HUB_DESCRIPTOR_SIZE,
        UDESC_HUB,
        0,
        {0,0},
        0,
        0,
        {0},
};

/*
 * Simulate a hardware hub by handling all the necessary requests.
 */
usbd_status
ohci_root_ctrl_transfer(struct usbd_xfer *xfer)
{
        usbd_status err;

        /* Insert last in queue. */
        err = usb_insert_transfer(xfer);
        if (err)
                return (err);

        /* Pipe isn't running, start first */
        return (ohci_root_ctrl_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
}

usbd_status
ohci_root_ctrl_start(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        usb_device_request_t *req;
        void *buf = NULL;
        int port, i;
        int s, len, value, index, l, totlen = 0;
        usb_port_status_t ps;
        usb_device_descriptor_t devd;
        usb_hub_descriptor_t hubd;
        usbd_status err;
        u_int32_t v;

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

#ifdef DIAGNOSTIC
        if (!(xfer->rqflags & URQ_REQUEST))
                /* XXX panic */
                return (USBD_INVAL);
#endif
        req = &xfer->request;

        DPRINTFN(4,("ohci_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);

        if (len != 0)
                buf = KERNADDR(&xfer->dmabuf, 0);

#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(8,("ohci_root_ctrl_control wValue=0x%04x\n", value));
                switch(value >> 8) {
                case UDESC_DEVICE:
                        if ((value & 0xff) != 0) {
                                err = USBD_IOERROR;
                                goto ret;
                        }
                        devd = ohci_devd;
                        USETW(devd.idVendor, sc->sc_id_vendor);
                        totlen = l = min(len, USB_DEVICE_DESCRIPTOR_SIZE);
                        memcpy(buf, &devd, l);
                        break;
                case UDESC_CONFIG:
                        if ((value & 0xff) != 0) {
                                err = USBD_IOERROR;
                                goto ret;
                        }
                        totlen = l = min(len, USB_CONFIG_DESCRIPTOR_SIZE);
                        memcpy(buf, &ohci_confd, l);
                        buf = (char *)buf + l;
                        len -= l;
                        l = min(len, USB_INTERFACE_DESCRIPTOR_SIZE);
                        totlen += l;
                        memcpy(buf, &ohci_ifcd, l);
                        buf = (char *)buf + l;
                        len -= l;
                        l = min(len, USB_ENDPOINT_DESCRIPTOR_SIZE);
                        totlen += l;
                        memcpy(buf, &ohci_endpd, l);
                        break;
                case UDESC_STRING:
                        if (len == 0)
                                break;
                        *(u_int8_t *)buf = 0;
                        totlen = 1;
                        switch (value & 0xff) {
                        case 0: /* Language table */
                                totlen = usbd_str(buf, len, "\001");
                                break;
                        case 1: /* Vendor */
                                totlen = usbd_str(buf, len, sc->sc_vendor);
                                break;
                        case 2: /* Product */
                                totlen = usbd_str(buf, len, "OHCI root hub");
                                break;
                        }
                        break;
                default:
                        err = 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) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                break;
        case C(UR_SET_CONFIG, UT_WRITE_DEVICE):
                if (value != 0 && value != 1) {
                        err = 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):
                err = 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(8, ("ohci_root_ctrl_control: UR_CLEAR_PORT_FEATURE "
                             "port=%d feature=%d\n",
                             index, value));
                if (index < 1 || index > sc->sc_noport) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                port = OHCI_RH_PORT_STATUS(index);
                switch(value) {
                case UHF_PORT_ENABLE:
                        OWRITE4(sc, port, UPS_CURRENT_CONNECT_STATUS);
                        break;
                case UHF_PORT_SUSPEND:
                        OWRITE4(sc, port, UPS_OVERCURRENT_INDICATOR);
                        break;
                case UHF_PORT_POWER:
                        /* Yes, writing to the LOW_SPEED bit clears power. */
                        OWRITE4(sc, port, UPS_LOW_SPEED);
                        break;
                case UHF_C_PORT_CONNECTION:
                        OWRITE4(sc, port, UPS_C_CONNECT_STATUS << 16);
                        break;
                case UHF_C_PORT_ENABLE:
                        OWRITE4(sc, port, UPS_C_PORT_ENABLED << 16);
                        break;
                case UHF_C_PORT_SUSPEND:
                        OWRITE4(sc, port, UPS_C_SUSPEND << 16);
                        break;
                case UHF_C_PORT_OVER_CURRENT:
                        OWRITE4(sc, port, UPS_C_OVERCURRENT_INDICATOR << 16);
                        break;
                case UHF_C_PORT_RESET:
                        OWRITE4(sc, port, UPS_C_PORT_RESET << 16);
                        break;
                default:
                        err = USBD_IOERROR;
                        goto ret;
                }
                switch(value) {
                case UHF_C_PORT_CONNECTION:
                case UHF_C_PORT_ENABLE:
                case UHF_C_PORT_SUSPEND:
                case UHF_C_PORT_OVER_CURRENT:
                case UHF_C_PORT_RESET:
                        /* Enable RHSC interrupt if condition is cleared. */
                        if ((OREAD4(sc, port) >> 16) == 0)
                                ohci_rhsc_able(sc, 1);
                        break;
                default:
                        break;
                }
                break;
        case C(UR_GET_DESCRIPTOR, UT_READ_CLASS_DEVICE):
                if ((value & 0xff) != 0) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                v = OREAD4(sc, OHCI_RH_DESCRIPTOR_A);
                hubd = ohci_hubd;
                hubd.bNbrPorts = sc->sc_noport;
                USETW(hubd.wHubCharacteristics,
                      (v & OHCI_NPS ? UHD_PWR_NO_SWITCH :
                       v & OHCI_PSM ? UHD_PWR_GANGED : UHD_PWR_INDIVIDUAL)
                      /* XXX overcurrent */
                      );
                hubd.bPwrOn2PwrGood = OHCI_GET_POTPGT(v);
                v = OREAD4(sc, OHCI_RH_DESCRIPTOR_B);
                for (i = 0, l = sc->sc_noport; l > 0; i++, l -= 8, v >>= 8)
                        hubd.DeviceRemovable[i++] = (u_int8_t)v;
                hubd.bDescLength = USB_HUB_DESCRIPTOR_SIZE + i;
                l = min(len, hubd.bDescLength);
                totlen = l;
                memcpy(buf, &hubd, l);
                break;
        case C(UR_GET_STATUS, UT_READ_CLASS_DEVICE):
                if (len != 4) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                memset(buf, 0, len); /* ? XXX */
                totlen = len;
                break;
        case C(UR_GET_STATUS, UT_READ_CLASS_OTHER):
                DPRINTFN(8,("ohci_root_ctrl_transfer: get port status i=%d\n",
                            index));
                if (index < 1 || index > sc->sc_noport) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                if (len != 4) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                v = OREAD4(sc, OHCI_RH_PORT_STATUS(index));
                DPRINTFN(8,("ohci_root_ctrl_transfer: port status=0x%04x\n",
                            v));
                USETW(ps.wPortStatus, v);
                USETW(ps.wPortChange, v >> 16);
                l = min(len, sizeof ps);
                memcpy(buf, &ps, l);
                totlen = l;
                break;
        case C(UR_SET_DESCRIPTOR, UT_WRITE_CLASS_DEVICE):
                err = 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 || index > sc->sc_noport) {
                        err = USBD_IOERROR;
                        goto ret;
                }
                port = OHCI_RH_PORT_STATUS(index);
                switch(value) {
                case UHF_PORT_ENABLE:
                        OWRITE4(sc, port, UPS_PORT_ENABLED);
                        break;
                case UHF_PORT_SUSPEND:
                        OWRITE4(sc, port, UPS_SUSPEND);
                        break;
                case UHF_PORT_RESET:
                        DPRINTFN(5,("ohci_root_ctrl_transfer: reset port %d\n",
                                    index));
                        OWRITE4(sc, port, UPS_RESET);
                        for (i = 0; i < 5; i++) {
                                usb_delay_ms(&sc->sc_bus,
                                             USB_PORT_ROOT_RESET_DELAY);
                                if (sc->sc_bus.dying) {
                                        err = USBD_IOERROR;
                                        goto ret;
                                }
                                if ((OREAD4(sc, port) & UPS_RESET) == 0)
                                        break;
                        }
                        DPRINTFN(8,("ohci port %d reset, status = 0x%04x\n",
                                    index, OREAD4(sc, port)));
                        break;
                case UHF_PORT_POWER:
                        DPRINTFN(2,("ohci_root_ctrl_transfer: set port power "
                                    "%d\n", index));
                        OWRITE4(sc, port, UPS_PORT_POWER);
                        break;
                case UHF_PORT_DISOWN_TO_1_1:
                        /* accept, but do nothing */
                        break;
                default:
                        err = USBD_IOERROR;
                        goto ret;
                }
                break;
        default:
                err = USBD_IOERROR;
                goto ret;
        }
        xfer->actlen = totlen;
        err = USBD_NORMAL_COMPLETION;
 ret:
        xfer->status = err;
        s = splusb();
        usb_transfer_complete(xfer);
        splx(s);
        return (err);
}

/* Abort a root control request. */
void
ohci_root_ctrl_abort(struct usbd_xfer *xfer)
{
        /* Nothing to do, all transfers are synchronous. */
}

/* Close the root pipe. */
void
ohci_root_ctrl_close(struct usbd_pipe *pipe)
{
        DPRINTF(("ohci_root_ctrl_close\n"));
        /* Nothing to do. */
}

usbd_status
ohci_root_intr_transfer(struct usbd_xfer *xfer)
{
        usbd_status err;

        /* Insert last in queue. */
        err = usb_insert_transfer(xfer);
        if (err)
                return (err);

        /* Pipe isn't running, start first */
        return (ohci_root_intr_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
}

usbd_status
ohci_root_intr_start(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

        sc->sc_intrxfer = xfer;

        return (USBD_IN_PROGRESS);
}

void
ohci_root_intr_abort(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        int s;

        sc->sc_intrxfer = NULL;

        xfer->status = USBD_CANCELLED;
        s = splusb();
        usb_transfer_complete(xfer);
        splx(s);
}

void
ohci_root_intr_close(struct usbd_pipe *pipe)
{
}

usbd_status
ohci_device_ctrl_transfer(struct usbd_xfer *xfer)
{
        usbd_status err;

        /* Insert last in queue. */
        err = usb_insert_transfer(xfer);
        if (err)
                return (err);

        /* Pipe isn't running, start first */
        return (ohci_device_ctrl_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
}

usbd_status
ohci_device_ctrl_start(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        usbd_status err;

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

#ifdef DIAGNOSTIC
        if (!(xfer->rqflags & URQ_REQUEST)) {
                /* XXX panic */
                printf("ohci_device_ctrl_transfer: not a request\n");
                return (USBD_INVAL);
        }
#endif

        err = ohci_device_request(xfer);
        if (err)
                return (err);

        return (USBD_IN_PROGRESS);
}

/* Abort a device control request. */
void
ohci_device_ctrl_abort(struct usbd_xfer *xfer)
{
        DPRINTF(("ohci_device_ctrl_abort: xfer=%p\n", xfer));
        ohci_abort_xfer(xfer, USBD_CANCELLED);
}

/* Close a device control pipe. */
void
ohci_device_ctrl_close(struct usbd_pipe *pipe)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;

        DPRINTF(("ohci_device_ctrl_close: pipe=%p\n", pipe));
        ohci_close_pipe(pipe, sc->sc_ctrl_head);
        ohci_free_std(sc, opipe->tail.td);
}

/************************/

void
ohci_device_clear_toggle(struct usbd_pipe *pipe)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;

        opipe->sed->ed.ed_headp &= htole32(~OHCI_TOGGLECARRY);
}

usbd_status
ohci_device_bulk_transfer(struct usbd_xfer *xfer)
{
        usbd_status err;

        /* Insert last in queue. */
        err = usb_insert_transfer(xfer);
        if (err)
                return (err);

        /* Pipe isn't running, start first */
        return (ohci_device_bulk_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
}

usbd_status
ohci_device_bulk_start(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        struct ohci_soft_td *data, *tail, *tdp;
        struct ohci_soft_ed *sed;
        u_int len;
        int s, endpt;
        usbd_status err;

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

#ifdef DIAGNOSTIC
        if (xfer->rqflags & URQ_REQUEST) {
                /* XXX panic */
                printf("ohci_device_bulk_start: a request\n");
                return (USBD_INVAL);
        }
#endif

        len = xfer->length;
        endpt = xfer->pipe->endpoint->edesc->bEndpointAddress;
        sed = opipe->sed;

        DPRINTFN(4,("ohci_device_bulk_start: xfer=%p len=%u "
                    "flags=%d endpt=%d\n", xfer, len, xfer->flags, endpt));

        /* Update device address */
        sed->ed.ed_flags = htole32(
                (letoh32(sed->ed.ed_flags) & ~OHCI_ED_ADDRMASK) |
                OHCI_ED_SET_FA(xfer->device->address));

        /* Allocate a chain of new TDs (including a new tail). */
        data = opipe->tail.td;
        err = ohci_alloc_std_chain(sc, len, xfer, data, &tail);
        /* We want interrupt at the end of the transfer. */
        tail->td.td_flags &= htole32(~OHCI_TD_INTR_MASK);
        tail->td.td_flags |= htole32(OHCI_TD_SET_DI(1));
        tail->flags |= OHCI_CALL_DONE;
        tail = tail->nexttd;    /* point at sentinel */
        if (err)
                return (err);

        tail->xfer = NULL;
        xfer->hcpriv = data;

        DPRINTFN(4,("ohci_device_bulk_start: ed_flags=0x%08x td_flags=0x%08x "
                    "td_cbp=0x%08x td_be=0x%08x\n",
                    (int)letoh32(sed->ed.ed_flags),
                    (int)letoh32(data->td.td_flags),
                    (int)letoh32(data->td.td_cbp),
                    (int)letoh32(data->td.td_be)));

#ifdef OHCI_DEBUG
        if (ohcidebug > 5) {
                ohci_dump_ed(sed);
                ohci_dump_tds(data);
        }
#endif

        /* Insert ED in schedule */
        s = splusb();
        for (tdp = data; tdp != tail; tdp = tdp->nexttd) {
                tdp->xfer = xfer;
        }
        sed->ed.ed_tailp = htole32(tail->physaddr);
        opipe->tail.td = tail;
        sed->ed.ed_flags &= htole32(~OHCI_ED_SKIP);
        OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_BLF);
        if (xfer->timeout && !sc->sc_bus.use_polling) {
                timeout_del(&xfer->timeout_handle);
                timeout_set(&xfer->timeout_handle, ohci_timeout, xfer);
                timeout_add_msec(&xfer->timeout_handle, xfer->timeout);
        }

#if 0
/* This goes wrong if we are too slow. */
        if (ohcidebug > 10) {
                delay(10000);
                DPRINTF(("ohci_device_intr_transfer: status=%x\n",
                         OREAD4(sc, OHCI_COMMAND_STATUS)));
                ohci_dump_ed(sed);
                ohci_dump_tds(data);
        }
#endif

        splx(s);

        return (USBD_IN_PROGRESS);
}

void
ohci_device_bulk_abort(struct usbd_xfer *xfer)
{
        DPRINTF(("ohci_device_bulk_abort: xfer=%p\n", xfer));
        ohci_abort_xfer(xfer, USBD_CANCELLED);
}

/*
 * Close a device bulk pipe.
 */
void
ohci_device_bulk_close(struct usbd_pipe *pipe)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;

        DPRINTF(("ohci_device_bulk_close: pipe=%p\n", pipe));
        ohci_close_pipe(pipe, sc->sc_bulk_head);
        ohci_free_std(sc, opipe->tail.td);
}

/************************/

usbd_status
ohci_device_intr_transfer(struct usbd_xfer *xfer)
{
        usbd_status err;

        /* Insert last in queue. */
        err = usb_insert_transfer(xfer);
        if (err)
                return (err);

        /* Pipe isn't running, start first */
        return (ohci_device_intr_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
}

usbd_status
ohci_device_intr_start(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        struct ohci_soft_ed *sed = opipe->sed;
        struct ohci_soft_td *data, *tail;
        int s, len, endpt;

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

        DPRINTFN(3, ("ohci_device_intr_transfer: xfer=%p len=%u "
                     "flags=%d priv=%p\n",
                     xfer, xfer->length, xfer->flags, xfer->priv));

#ifdef DIAGNOSTIC
        if (xfer->rqflags & URQ_REQUEST)
                panic("ohci_device_intr_transfer: a request");
#endif

        usb_syncmem(&xfer->dmabuf, 0, xfer->length,
            usbd_xfer_isread(xfer) ?
            BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);

        len = xfer->length;
        endpt = xfer->pipe->endpoint->edesc->bEndpointAddress;

        data = opipe->tail.td;
        tail = ohci_alloc_std(sc);
        if (tail == NULL)
                return (USBD_NOMEM);
        tail->xfer = NULL;

        data->td.td_flags = htole32(
                (usbd_xfer_isread(xfer) ? OHCI_TD_IN : OHCI_TD_OUT) |
                OHCI_TD_NOCC |
                OHCI_TD_SET_DI(1) | OHCI_TD_TOGGLE_CARRY);
        if (xfer->flags & USBD_SHORT_XFER_OK)
                data->td.td_flags |= htole32(OHCI_TD_R);
        data->td.td_cbp = htole32(DMAADDR(&xfer->dmabuf, 0));
        data->nexttd = tail;
        data->td.td_nexttd = htole32(tail->physaddr);
        data->td.td_be = htole32(letoh32(data->td.td_cbp) + len - 1);
        data->len = len;
        data->xfer = xfer;
        data->flags = OHCI_CALL_DONE | OHCI_ADD_LEN;
        xfer->hcpriv = data;

#ifdef OHCI_DEBUG
        if (ohcidebug > 5) {
                DPRINTF(("ohci_device_intr_transfer:\n"));
                ohci_dump_ed(sed);
                ohci_dump_tds(data);
        }
#endif

        /* Insert ED in schedule */
        s = splusb();
        sed->ed.ed_tailp = htole32(tail->physaddr);
        opipe->tail.td = tail;
        sed->ed.ed_flags &= htole32(~OHCI_ED_SKIP);

#if 0
/*
 * This goes horribly wrong, printing thousands of descriptors,
 * because false references are followed due to the fact that the
 * TD is gone.
 */
        if (ohcidebug > 5) {
                usb_delay_ms(&sc->sc_bus, 5);
                DPRINTF(("ohci_device_intr_transfer: status=%x\n",
                         OREAD4(sc, OHCI_COMMAND_STATUS)));
                ohci_dump_ed(sed);
                ohci_dump_tds(data);
        }
#endif
        splx(s);

        return (USBD_IN_PROGRESS);
}

void
ohci_device_intr_abort(struct usbd_xfer *xfer)
{
        KASSERT(!xfer->pipe->repeat || xfer->pipe->intrxfer == xfer);

        ohci_abort_xfer(xfer, USBD_CANCELLED);
}

/* Close a device interrupt pipe. */
void
ohci_device_intr_close(struct usbd_pipe *pipe)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;
        int nslots = opipe->u.intr.nslots;
        int pos = opipe->u.intr.pos;
        int j;
        struct ohci_soft_ed *p, *sed = opipe->sed;
        int s;

        DPRINTFN(1,("ohci_device_intr_close: pipe=%p nslots=%d pos=%d\n",
                    pipe, nslots, pos));
        s = splusb();
        sed->ed.ed_flags |= htole32(OHCI_ED_SKIP);
        if ((letoh32(sed->ed.ed_tailp) & OHCI_HEADMASK) !=
            (letoh32(sed->ed.ed_headp) & OHCI_HEADMASK))
                usb_delay_ms(&sc->sc_bus, 2);

        for (p = sc->sc_eds[pos]; p && p->next != sed; p = p->next)
                ;
#ifdef DIAGNOSTIC
        if (p == NULL)
                panic("ohci_device_intr_close: ED not found");
#endif
        p->next = sed->next;
        p->ed.ed_nexted = sed->ed.ed_nexted;
        splx(s);

        for (j = 0; j < nslots; j++)
                --sc->sc_bws[(pos * nslots + j) % OHCI_NO_INTRS];

        ohci_free_std(sc, opipe->tail.td);
        ohci_free_sed(sc, opipe->sed);
}

usbd_status
ohci_device_setintr(struct ohci_softc *sc, struct ohci_pipe *opipe, int ival)
{
        int i, j, s, best;
        u_int npoll, slow, shigh, nslots;
        u_int bestbw, bw;
        struct ohci_soft_ed *hsed, *sed = opipe->sed;

        DPRINTFN(2, ("ohci_setintr: pipe=%p\n", opipe));
        if (ival == 0) {
                printf("ohci_setintr: 0 interval\n");
                return (USBD_INVAL);
        }

        npoll = OHCI_NO_INTRS;
        while (npoll > ival)
                npoll /= 2;
        DPRINTFN(2, ("ohci_setintr: ival=%d npoll=%d\n", ival, npoll));

        /*
         * We now know which level in the tree the ED must go into.
         * Figure out which slot has most bandwidth left over.
         * Slots to examine:
         * npoll
         * 1    0
         * 2    1 2
         * 4    3 4 5 6
         * 8    7 8 9 10 11 12 13 14
         * N    (N-1) .. (N-1+N-1)
         */
        slow = npoll-1;
        shigh = slow + npoll;
        nslots = OHCI_NO_INTRS / npoll;
        for (best = i = slow, bestbw = ~0; i < shigh; i++) {
                bw = 0;
                for (j = 0; j < nslots; j++)
                        bw += sc->sc_bws[(i * nslots + j) % OHCI_NO_INTRS];
                if (bw < bestbw) {
                        best = i;
                        bestbw = bw;
                }
        }
        DPRINTFN(2, ("ohci_setintr: best=%d(%d..%d) bestbw=%d\n",
                     best, slow, shigh, bestbw));

        s = splusb();
        hsed = sc->sc_eds[best];
        sed->next = hsed->next;
        sed->ed.ed_nexted = hsed->ed.ed_nexted;
        hsed->next = sed;
        hsed->ed.ed_nexted = htole32(sed->physaddr);
        splx(s);

        for (j = 0; j < nslots; j++)
                ++sc->sc_bws[(best * nslots + j) % OHCI_NO_INTRS];
        opipe->u.intr.nslots = nslots;
        opipe->u.intr.pos = best;

        DPRINTFN(5, ("ohci_setintr: returns %p\n", opipe));
        return (USBD_NORMAL_COMPLETION);
}

/***********************/

usbd_status
ohci_device_isoc_transfer(struct usbd_xfer *xfer)
{
        usbd_status err;

        DPRINTFN(5,("ohci_device_isoc_transfer: xfer=%p\n", xfer));

        /* Put it on our queue, */
        err = usb_insert_transfer(xfer);

        /* bail out on error, */
        if (err && err != USBD_IN_PROGRESS)
                return (err);

        /* XXX should check inuse here */

        /* insert into schedule, */
        ohci_device_isoc_enter(xfer);

        /* and start if the pipe wasn't running */
        if (!err)
                ohci_device_isoc_start(SIMPLEQ_FIRST(&xfer->pipe->queue));

        return (err);
}

void
ohci_device_isoc_enter(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        struct ohci_soft_ed *sed = opipe->sed;
        struct iso *iso = &opipe->u.iso;
        struct ohci_soft_itd *sitd, *nsitd;
        ohci_physaddr_t buf, offs, noffs, bp0;
        int i, ncur, nframes;
        int s;

        DPRINTFN(1,("ohci_device_isoc_enter: used=%d next=%d xfer=%p "
                    "nframes=%d\n",
                    iso->inuse, iso->next, xfer, xfer->nframes));

        if (sc->sc_bus.dying)
                return;

        usb_syncmem(&xfer->dmabuf, 0, xfer->length,
            usbd_xfer_isread(xfer) ?
            BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);

        if (iso->next == -1) {
                /* Not in use yet, schedule it a few frames ahead. */
                iso->next = letoh32(sc->sc_hcca->hcca_frame_number) + 5;
                DPRINTFN(2,("ohci_device_isoc_enter: start next=%d\n",
                            iso->next));
        }

        sitd = opipe->tail.itd;
        buf = DMAADDR(&xfer->dmabuf, 0);
        bp0 = OHCI_PAGE(buf);
        offs = OHCI_PAGE_OFFSET(buf);
        nframes = xfer->nframes;
        xfer->hcpriv = sitd;
        for (i = ncur = 0; i < nframes; i++, ncur++) {
                noffs = offs + xfer->frlengths[i];
                if (ncur == OHCI_ITD_NOFFSET || /* all offsets used */
                    OHCI_PAGE(buf + noffs) > bp0 + OHCI_PAGE_SIZE) { /* too many page crossings */

                        /* Allocate next ITD */
                        nsitd = ohci_alloc_sitd(sc);
                        if (nsitd == NULL) {
                                /* XXX what now? */
                                printf("%s: isoc TD alloc failed\n",
                                       sc->sc_bus.bdev.dv_xname);
                                return;
                        }

                        /* Fill current ITD */
                        sitd->itd.itd_flags = htole32(
                                OHCI_ITD_NOCC |
                                OHCI_ITD_SET_SF(iso->next) |
                                OHCI_ITD_SET_DI(6) | /* delay intr a little */
                                OHCI_ITD_SET_FC(ncur));
                        sitd->itd.itd_bp0 = htole32(bp0);
                        sitd->nextitd = nsitd;
                        sitd->itd.itd_nextitd = htole32(nsitd->physaddr);
                        sitd->itd.itd_be = htole32(bp0 + offs - 1);
                        sitd->xfer = xfer;
                        sitd->flags = 0;

                        sitd = nsitd;
                        iso->next = iso->next + ncur;
                        bp0 = OHCI_PAGE(buf + offs);
                        ncur = 0;
                }
                sitd->itd.itd_offset[ncur] = htole16(OHCI_ITD_MK_OFFS(offs));
                offs = noffs;
        }
        nsitd = ohci_alloc_sitd(sc);
        if (nsitd == NULL) {
                /* XXX what now? */
                printf("%s: isoc TD alloc failed\n",
                       sc->sc_bus.bdev.dv_xname);
                return;
        }
        /* Fixup last used ITD */
        sitd->itd.itd_flags = htole32(
                OHCI_ITD_NOCC |
                OHCI_ITD_SET_SF(iso->next) |
                OHCI_ITD_SET_DI(0) |
                OHCI_ITD_SET_FC(ncur));
        sitd->itd.itd_bp0 = htole32(bp0);
        sitd->nextitd = nsitd;
        sitd->itd.itd_nextitd = htole32(nsitd->physaddr);
        sitd->itd.itd_be = htole32(bp0 + offs - 1);
        sitd->xfer = xfer;
        sitd->flags = OHCI_CALL_DONE;

        iso->next = iso->next + ncur;
        iso->inuse += nframes;

        xfer->actlen = offs;    /* XXX pretend we did it all */

        xfer->status = USBD_IN_PROGRESS;

#ifdef OHCI_DEBUG
        if (ohcidebug > 5) {
                DPRINTF(("ohci_device_isoc_enter: frame=%d\n",
                         letoh32(sc->sc_hcca->hcca_frame_number)));
                ohci_dump_itds(xfer->hcpriv);
                ohci_dump_ed(sed);
        }
#endif

        s = splusb();
        sed->ed.ed_tailp = htole32(nsitd->physaddr);
        opipe->tail.itd = nsitd;
        sed->ed.ed_flags &= htole32(~OHCI_ED_SKIP);
        splx(s);

#ifdef OHCI_DEBUG
        if (ohcidebug > 5) {
                delay(150000);
                DPRINTF(("ohci_device_isoc_enter: after frame=%d\n",
                         letoh32(sc->sc_hcca->hcca_frame_number)));
                ohci_dump_itds(xfer->hcpriv);
                ohci_dump_ed(sed);
        }
#endif
}

usbd_status
ohci_device_isoc_start(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;

        DPRINTFN(5,("ohci_device_isoc_start: xfer=%p\n", xfer));

        if (sc->sc_bus.dying)
                return (USBD_IOERROR);

#ifdef DIAGNOSTIC
        if (xfer->status != USBD_IN_PROGRESS)
                printf("ohci_device_isoc_start: not in progress %p\n", xfer);
#endif

        return (USBD_IN_PROGRESS);
}

void
ohci_device_isoc_abort(struct usbd_xfer *xfer)
{
        struct ohci_softc *sc = (struct ohci_softc *)xfer->device->bus;
        struct ohci_pipe *opipe = (struct ohci_pipe *)xfer->pipe;
        struct ohci_soft_ed *sed;
        struct ohci_soft_itd *sitd;
        int s;

        s = splusb();

        DPRINTFN(1,("ohci_device_isoc_abort: xfer=%p\n", xfer));

        /* Transfer is already done. */
        if (xfer->status != USBD_NOT_STARTED &&
            xfer->status != USBD_IN_PROGRESS) {
                splx(s);
                printf("ohci_device_isoc_abort: early return\n");
                return;
        }

        /* Give xfer the requested abort code. */
        xfer->status = USBD_CANCELLED;

        sed = opipe->sed;
        sed->ed.ed_flags |= htole32(OHCI_ED_SKIP); /* force hardware skip */

        sitd = xfer->hcpriv;
#ifdef DIAGNOSTIC
        if (sitd == NULL) {
                splx(s);
                printf("ohci_device_isoc_abort: hcpriv==0\n");
                return;
        }
#endif
        for (; sitd->xfer == xfer; sitd = sitd->nextitd) {
#ifdef DIAGNOSTIC
                DPRINTFN(1,("abort sets done sitd=%p\n", sitd));
                sitd->isdone = 1;
#endif
        }

        splx(s);

        usb_delay_ms(&sc->sc_bus, OHCI_ITD_NOFFSET);

        s = splusb();

        /* Run callback. */
        usb_transfer_complete(xfer);

        sed->ed.ed_headp = htole32(sitd->physaddr); /* unlink TDs */
        sed->ed.ed_flags &= htole32(~OHCI_ED_SKIP); /* remove hardware skip */

        splx(s);
}

void
ohci_device_isoc_done(struct usbd_xfer *xfer)
{
        DPRINTFN(1,("ohci_device_isoc_done: xfer=%p\n", xfer));
}

usbd_status
ohci_setup_isoc(struct usbd_pipe *pipe)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;
        struct iso *iso = &opipe->u.iso;
        int s;

        iso->next = -1;
        iso->inuse = 0;

        s = splusb();
        ohci_add_ed(opipe->sed, sc->sc_isoc_head);
        splx(s);

        return (USBD_NORMAL_COMPLETION);
}

void
ohci_device_isoc_close(struct usbd_pipe *pipe)
{
        struct ohci_pipe *opipe = (struct ohci_pipe *)pipe;
        struct ohci_softc *sc = (struct ohci_softc *)pipe->device->bus;

        DPRINTF(("ohci_device_isoc_close: pipe=%p\n", pipe));
        ohci_close_pipe(pipe, sc->sc_isoc_head);
#ifdef DIAGNOSTIC
        opipe->tail.itd->isdone = 1;
#endif
        ohci_free_sitd(sc, opipe->tail.itd);
}