1 files changed, 3246 insertions, 0 deletions

diff --git a/sys/dev/firewire/firewire.c b/sys/dev/firewire/firewire.c
new file mode 100644
index 000000000000..bdff903a145f
--- /dev/null
+++ b/sys/dev/firewire/firewire.c
@@ -0,0 +1,3246 @@
+/*
+ * Copyright (c) 1998-2002 Katsushi Kobayashi and Hidetoshi Shimokawa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the acknowledgement as bellow:
+ *
+ *    This product includes software developed by K. Kobayashi and H. Shimokawa
+ *
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ * 
+ * $FreeBSD$
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/conf.h>
+#include <sys/uio.h>
+#include <sys/sysctl.h>
+#include <sys/poll.h>
+
+#include <machine/cpufunc.h>    /* for rdtsc proto for clock.h below */
+#include <machine/clock.h>
+#include <pci/pcivar.h>
+#include <pci/pcireg.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>            /* for vtophys proto */
+#include <vm/vm_extern.h> 
+
+#include <sys/bus.h>		/* used by smbus and newbus */
+
+#include <machine/bus.h>	/* used by newbus */
+#include <sys/rman.h>		/* used by newbus */
+#include <machine/resource.h>	/* used by newbus */
+
+#include <sys/signal.h>
+#include <sys/mman.h>
+#include <sys/ioccom.h>
+
+#include <dev/firewire/firewire.h>
+#include <dev/firewire/firewirereg.h>
+#include <dev/firewire/fwmem.h>
+#include <dev/firewire/iec13213.h>
+#include <dev/firewire/iec68113.h>
+
+int firewire_debug=0;
+SYSCTL_NODE(_hw, OID_AUTO, firewire, CTLFLAG_RD, 0, "Firewire Subsystem");
+SYSCTL_INT(_debug, OID_AUTO, firewire_debug, CTLFLAG_RW, &firewire_debug, 0,
+	"Firewire driver debug flag");
+
+#define CDEV_MAJOR 127
+#define FW_MAXASYRTY 4
+#define FW_MAXDEVRCNT 4
+#define	FWNODE_INVAL 0xffff
+
+#define XFER_TIMEOUT 0
+
+static	d_open_t	fw_open;
+static	d_close_t	fw_close;
+static	d_ioctl_t	fw_ioctl;
+static	d_poll_t	fw_poll;
+static	d_read_t	fw_read;	/* for Isochronous packet */
+static	d_write_t	fw_write;
+static	d_mmap_t	fw_mmap;
+
+devclass_t firewire_devclass;
+
+
+static int firewire_match      __P((device_t));
+static int firewire_attach      __P((device_t));
+static int firewire_detach      __P((device_t));
+#if 0
+static int firewire_shutdown    __P((device_t));
+#endif
+static device_t firewire_add_child   __P((device_t, int, const char *, int));
+static struct fw_bind *fw_bindlookup __P((struct firewire_comm *, u_int32_t, u_int32_t));
+static void fw_try_bmr __P((void *));
+static void fw_try_bmr_callback __P((struct fw_xfer *));
+static u_int16_t fw_noderesolve __P((struct firewire_comm *, struct fw_eui64));
+static void fw_asystart __P((struct fw_xfer *));
+static int fw_get_tlabel __P((struct firewire_comm *, struct fw_xfer *));
+static void fw_bus_probe __P((struct firewire_comm *));
+static void fw_bus_explore __P((struct firewire_comm *));
+static void fw_bus_explore_callback __P((struct fw_xfer *));
+static void fw_attach_dev __P((struct firewire_comm *));
+static void fw_vmaccess __P((struct fw_xfer *));
+struct fw_xfer *asyreqq __P((struct firewire_comm *, u_int8_t, u_int8_t, u_int8_t,
+	u_int32_t, u_int32_t, void (*)__P((struct fw_xfer *))));
+
+static device_method_t firewire_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		firewire_match),
+	DEVMETHOD(device_attach,	firewire_attach),
+	DEVMETHOD(device_detach,	firewire_detach),
+	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
+
+	/* Bus interface */
+	DEVMETHOD(bus_add_child,	firewire_add_child),
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+
+	{ 0, 0 }
+};
+char linkspeed[7][0x10]={"S100","S200","S400","S800","S1600","S3200","Unknown"};
+u_int maxrec[6]={512,1024,2048,4096,8192,0};
+
+#define MAX_GAPHOP  16
+u_int gap_cnt[] = {1, 1, 4, 6, 9, 12, 14, 17,
+			20, 23, 25, 28, 31, 33, 36, 39, 42};
+/*
+ * The probe routine.
+ */
+struct cdevsw firewire_cdevsw = 
+{
+	fw_open, fw_close, fw_read, fw_write, fw_ioctl,
+	fw_poll, fw_mmap, nostrategy, "fw", CDEV_MAJOR, nodump, nopsize, D_MEM
+};
+static driver_t firewire_driver = {
+	"firewire",
+	firewire_methods,
+	sizeof(struct firewire_softc),
+};
+
+static int
+fw_open (dev_t dev, int flags, int fmt, fw_proc *td)
+{
+	struct firewire_softc *sc;
+	int unit = DEV2UNIT(dev);
+	int sub = DEV2DMACH(dev);
+
+	int err = 0;
+
+	if (DEV_FWMEM(dev))
+		return fwmem_open(dev, flags, fmt, td);
+
+	sc = devclass_get_softc(firewire_devclass, unit);
+	if(sc->fc->ir[sub]->flag & FWXFERQ_OPEN){
+		err = EBUSY;
+		return err;
+	}
+	if(sc->fc->it[sub]->flag & FWXFERQ_OPEN){
+		err = EBUSY;
+		return err;
+	}
+	if(sc->fc->ir[sub]->flag & FWXFERQ_MODEMASK){
+		err = EBUSY;
+		return err;
+	}
+/* Default is per packet mode */
+	sc->fc->ir[sub]->flag |= FWXFERQ_OPEN;
+	sc->fc->it[sub]->flag |= FWXFERQ_OPEN;
+	sc->fc->ir[sub]->flag |= FWXFERQ_PACKET;
+	return err;
+}
+static int
+fw_close (dev_t dev, int flags, int fmt, fw_proc *td)
+{
+	struct firewire_softc *sc;
+	int unit = DEV2UNIT(dev);
+	int sub = DEV2DMACH(dev);
+	struct fw_xfer *xfer;
+	struct fw_dvbuf *dvbuf;
+	struct fw_bind *fwb;
+	int err = 0;
+
+	if (DEV_FWMEM(dev))
+		return fwmem_close(dev, flags, fmt, td);
+
+	sc = devclass_get_softc(firewire_devclass, unit);
+	if(!(sc->fc->ir[sub]->flag & FWXFERQ_OPEN)){
+		err = EINVAL;
+		return err;
+	}
+	sc->fc->ir[sub]->flag &= ~FWXFERQ_OPEN;
+	if(!(sc->fc->it[sub]->flag & FWXFERQ_OPEN)){
+		err = EINVAL;
+		return err;
+	}
+	sc->fc->it[sub]->flag &= ~FWXFERQ_OPEN;
+
+	if(sc->fc->ir[sub]->flag & FWXFERQ_RUNNING){
+		sc->fc->irx_disable(sc->fc, sub);
+	}
+	if(sc->fc->it[sub]->flag & FWXFERQ_RUNNING){
+		sc->fc->it[sub]->flag &= ~FWXFERQ_RUNNING;
+		sc->fc->itx_disable(sc->fc, sub);
+	}
+	if(sc->fc->it[sub]->flag & FWXFERQ_DV){
+		if((dvbuf = sc->fc->it[sub]->dvproc) != NULL){
+			free(dvbuf->buf, M_DEVBUF);
+			sc->fc->it[sub]->dvproc = NULL;
+		}
+		if((dvbuf = sc->fc->it[sub]->dvdma) != NULL){
+			free(dvbuf->buf, M_DEVBUF);
+			sc->fc->it[sub]->dvdma = NULL;
+		}
+		while((dvbuf = STAILQ_FIRST(&sc->fc->it[sub]->dvvalid)) != NULL){
+			STAILQ_REMOVE_HEAD(&sc->fc->it[sub]->dvvalid, link);
+			free(dvbuf->buf, M_DEVBUF);
+		}
+		while((dvbuf = STAILQ_FIRST(&sc->fc->it[sub]->dvfree)) != NULL){
+			STAILQ_REMOVE_HEAD(&sc->fc->it[sub]->dvfree, link);
+			free(dvbuf->buf, M_DEVBUF);
+		}
+		free(sc->fc->it[sub]->dvbuf, M_DEVBUF);
+		sc->fc->it[sub]->dvbuf = NULL;
+	}
+	if(sc->fc->ir[sub]->flag & FWXFERQ_EXTBUF){
+		free(sc->fc->ir[sub]->buf, M_DEVBUF);
+		sc->fc->ir[sub]->buf = NULL;
+		free(sc->fc->ir[sub]->bulkxfer, M_DEVBUF);
+		sc->fc->ir[sub]->bulkxfer = NULL;
+		sc->fc->ir[sub]->flag &= ~FWXFERQ_EXTBUF;
+		sc->fc->ir[sub]->psize = FWPMAX_S400;
+		sc->fc->ir[sub]->maxq = FWMAXQUEUE;
+	}
+	if(sc->fc->it[sub]->flag & FWXFERQ_EXTBUF){
+		free(sc->fc->it[sub]->buf, M_DEVBUF);
+		sc->fc->it[sub]->buf = NULL;
+		free(sc->fc->it[sub]->bulkxfer, M_DEVBUF);
+		sc->fc->it[sub]->bulkxfer = NULL;
+		sc->fc->it[sub]->dvbuf = NULL;
+		sc->fc->it[sub]->flag &= ~FWXFERQ_EXTBUF;
+		sc->fc->it[sub]->psize = FWPMAX_S400;
+		sc->fc->it[sub]->maxq = FWMAXQUEUE;
+	}
+	for(xfer = STAILQ_FIRST(&sc->fc->ir[sub]->q);
+		xfer != NULL; xfer = STAILQ_FIRST(&sc->fc->ir[sub]->q)){
+		sc->fc->ir[sub]->queued--;
+		STAILQ_REMOVE_HEAD(&sc->fc->ir[sub]->q, link);
+
+		xfer->resp = 0;
+		switch(xfer->act_type){
+		case FWACT_XFER:
+			fw_xfer_done(xfer);
+			break;
+		default:
+			break;
+		}
+		fw_xfer_free(xfer);
+	}
+	for(fwb = STAILQ_FIRST(&sc->fc->ir[sub]->binds); fwb != NULL;
+		fwb = STAILQ_FIRST(&sc->fc->ir[sub]->binds)){
+		STAILQ_REMOVE(&sc->fc->binds, fwb, fw_bind, fclist);
+		STAILQ_REMOVE_HEAD(&sc->fc->ir[sub]->binds, chlist);
+		free(fwb, M_DEVBUF);
+	}
+	sc->fc->ir[sub]->flag &= ~FWXFERQ_MODEMASK;
+	sc->fc->it[sub]->flag &= ~FWXFERQ_MODEMASK;
+	return err;
+}
+/*
+ * read request.
+ */
+static int
+fw_read (dev_t dev, struct uio *uio, int ioflag)
+{
+	struct firewire_softc *sc;
+	struct fw_xferq *ir;
+	struct fw_xfer *xfer;
+	int err = 0, s, slept = 0;
+	int unit = DEV2UNIT(dev);
+	int sub = DEV2DMACH(dev);
+	struct fw_pkt *fp;
+
+	if (DEV_FWMEM(dev))
+		return fwmem_read(dev, uio, ioflag);
+
+	sc = devclass_get_softc(firewire_devclass, unit);
+
+	ir = sc->fc->ir[sub];
+
+	if(ir->flag & FWXFERQ_PACKET){
+		ir->stproc = NULL;
+	}
+readloop:
+	xfer = STAILQ_FIRST(&ir->q);
+	if(!(ir->flag & FWXFERQ_PACKET) && ir->stproc == NULL){
+		ir->stproc = STAILQ_FIRST(&ir->stvalid);
+		if(ir->stproc != NULL){
+			s = splfw();
+			STAILQ_REMOVE_HEAD(&ir->stvalid, link);
+			splx(s);
+			ir->queued = 0;
+		}
+	}
+
+	if(xfer == NULL && ir->stproc == NULL){
+		if(slept == 0){
+			slept = 1;
+			if(!(ir->flag & FWXFERQ_RUNNING)
+				&& (ir->flag & FWXFERQ_PACKET)){
+				err = sc->fc->irx_enable(sc->fc, sub);
+			}
+			if(err){
+				return err;
+			}
+			ir->flag |= FWXFERQ_WAKEUP;
+			err = tsleep((caddr_t)ir, FWPRI, "fw_read", hz);
+			if(err){
+				ir->flag &= ~FWXFERQ_WAKEUP;
+				return err;
+			}
+			goto readloop;
+		}else{
+			err = EIO;
+			return err;
+		}
+	}else if(xfer != NULL){
+		s = splfw();
+		ir->queued --;
+		STAILQ_REMOVE_HEAD(&ir->q, link);
+		splx(s);
+		fp = (struct fw_pkt *)(xfer->recv.buf + xfer->recv.off);
+		if(sc->fc->irx_post != NULL)
+			sc->fc->irx_post(sc->fc, fp->mode.ld);
+		err = uiomove(xfer->recv.buf + xfer->recv.off, xfer->recv.len, uio);
+		fw_xfer_free( xfer);
+	}else if(ir->stproc != NULL){
+		fp = (struct fw_pkt *)(ir->stproc->buf + ir->queued * ir->psize);
+		if(sc->fc->irx_post != NULL)
+			sc->fc->irx_post(sc->fc, fp->mode.ld);
+		if(ntohs(fp->mode.stream.len) == 0){
+			err = EIO;
+			return err;
+		}
+		err = uiomove((caddr_t)fp, ntohs(fp->mode.stream.len) + sizeof(u_int32_t), uio);
+		fp->mode.stream.len = 0;
+		ir->queued ++;
+		if(ir->queued >= ir->bnpacket){
+			s = splfw();
+			ir->stproc->flag = 0;
+			STAILQ_INSERT_TAIL(&ir->stfree, ir->stproc, link);
+			splx(s);
+			ir->stproc = NULL;
+		}
+	}
+#if 0
+	if(STAILQ_FIRST(&ir->q) == NULL &&
+		(ir->flag & FWXFERQ_RUNNING) && (ir->flag & FWXFERQ_PACKET)){
+		err = sc->fc->irx_enable(sc->fc, sub);
+	}
+#endif
+#if 0
+	if(STAILQ_FIRST(&ir->stvalid) == NULL &&
+		(ir->flag & FWXFERQ_RUNNING) && !(ir->flag & FWXFERQ_PACKET)){
+		err = sc->fc->irx_enable(sc->fc, sub);
+	}
+#endif
+	return err;
+}
+static int
+fw_write (dev_t dev, struct uio *uio, int ioflag)
+{
+	int err = 0;
+	struct firewire_softc *sc;
+	int unit = DEV2UNIT(dev);
+	int sub = DEV2DMACH(dev);
+	int tl, s, slept = 0;
+	struct fw_pkt *fp;
+	struct fw_xfer *xfer;
+	struct fw_xferq *xferq;
+	struct firewire_comm *fc;
+	struct fw_xferq *it;
+
+	if (DEV_FWMEM(dev))
+		return fwmem_write(dev, uio, ioflag);
+
+	sc = devclass_get_softc(firewire_devclass, unit);
+	fc = sc->fc;
+	it = sc->fc->it[sub];
+
+	fp = (struct fw_pkt *)uio->uio_iov->iov_base;
+	switch(fp->mode.common.tcode){
+	case FWTCODE_RREQQ:
+	case FWTCODE_RREQB:
+	case FWTCODE_LREQ:
+		err = EINVAL;
+		return err;
+	case FWTCODE_WREQQ:
+	case FWTCODE_WREQB:
+		xferq = fc->atq;
+		break;
+	case FWTCODE_STREAM:
+		if(it->flag & FWXFERQ_PACKET){
+			xferq = fc->atq;
+		}else{
+			xferq = NULL;
+		}
+		break;
+	case FWTCODE_WRES:
+	case FWTCODE_RRESQ:
+	case FWTCODE_RRESB:
+	case FWTCODE_LRES:
+		xferq = fc->ats;
+		break;
+	default:
+		err = EINVAL;
+		return err;
+	}
+	/* Discard unsent buffered stream packet, when sending Asyrequrst */
+	if(xferq != NULL && it->stproc != NULL){
+		s = splfw();
+		it->stproc->flag = 0;
+		STAILQ_INSERT_TAIL(&it->stfree, it->stproc, link);
+		splx(s);
+		it->stproc = NULL;
+	}
+	if(xferq == NULL && !(it->flag & FWXFERQ_DV)){
+isoloop:
+		if(it->stproc == NULL){
+			it->stproc = STAILQ_FIRST(&it->stfree);
+			if(it->stproc != NULL){
+				s = splfw();
+				STAILQ_REMOVE_HEAD(&it->stfree, link);
+				splx(s);
+				it->queued = 0;
+			}else if(slept == 0){
+				slept = 1;
+				err = sc->fc->itx_enable(sc->fc, sub);
+				if(err){
+					return err;
+				}
+				err = tsleep((caddr_t)it, FWPRI, "fw_write", hz);
+				if(err){
+					return err;
+				}
+				goto isoloop;
+			}else{
+				err = EIO;
+				return err;
+			}
+		}
+		fp = (struct fw_pkt *)(it->stproc->buf + it->queued * it->psize);
+		fp->mode.stream.len = htons(uio->uio_resid - sizeof(u_int32_t));
+		err = uiomove(it->stproc->buf + it->queued * it->psize,
+							uio->uio_resid, uio);
+		it->queued ++;
+		if(it->queued >= it->btpacket){
+			s = splfw();
+			STAILQ_INSERT_TAIL(&it->stvalid, it->stproc, link);
+			splx(s);
+			it->stproc = NULL;
+			fw_tbuf_update(sc->fc, sub, 0);
+			err = sc->fc->itx_enable(sc->fc, sub);
+		}
+		return err;
+	} if(xferq == NULL && it->flag & FWXFERQ_DV){
+dvloop:
+		if(it->dvproc == NULL){
+			it->dvproc = STAILQ_FIRST(&it->dvfree);
+			if(it->dvproc != NULL){
+				s = splfw();
+				STAILQ_REMOVE_HEAD(&it->dvfree, link);
+				splx(s);
+				it->dvptr = 0;
+			}else if(slept == 0){
+				slept = 1;
+				err = sc->fc->itx_enable(sc->fc, sub);
+				if(err){
+					return err;
+				}
+				err = tsleep((caddr_t)it, FWPRI, "fw_write", hz);
+				if(err){
+					return err;
+				}
+				goto dvloop;
+			}else{
+				err = EIO;
+				return err;
+			}
+		}
+		fp = (struct fw_pkt *)(it->dvproc->buf + it->queued * it->psize);
+		fp->mode.stream.len = htons(uio->uio_resid - sizeof(u_int32_t));
+		err = uiomove(it->dvproc->buf + it->dvptr,
+							uio->uio_resid, uio);
+		it->dvptr += it->psize;
+		if(err){
+			return err;
+		}
+		if(it->dvptr >= it->psize * it->dvpacket){
+			s = splfw();
+			STAILQ_INSERT_TAIL(&it->dvvalid, it->dvproc, link);
+			splx(s);
+			it->dvproc = NULL;
+			err = fw_tbuf_update(sc->fc, sub, 0);
+			if(err){
+				return err;
+			}
+			err = sc->fc->itx_enable(sc->fc, sub);
+		}
+		return err;
+	}
+	if(xferq != NULL){
+		xfer = fw_xfer_alloc();
+		if(xfer == NULL){
+			err = ENOMEM;
+			return err;
+		}
+		xfer->send.buf = malloc(uio->uio_resid, M_DEVBUF, M_NOWAIT);
+		if(xfer->send.buf == NULL){
+			fw_xfer_free( xfer);
+			err = ENOBUFS;
+			return err;
+		}
+		xfer->dst = ntohs(fp->mode.hdr.dst);
+	
+		switch(fp->mode.common.tcode){
+		case FWTCODE_WREQQ:
+		case FWTCODE_WREQB:
+			if((tl = fw_get_tlabel(fc, xfer)) == -1 ){
+				fw_xfer_free( xfer);
+				err = EAGAIN;
+				return err;
+			}
+			fp->mode.hdr.tlrt = tl << 2;
+		default:
+			break;
+		}
+	
+		xfer->tl = fp->mode.hdr.tlrt >> 2;
+		xfer->send.len = uio->uio_resid; 
+		xfer->send.off = 0; 
+		xfer->tcode = fp->mode.common.tcode;
+		xfer->spd = 0;/* XXX: how to setup it */
+		xfer->fc = fc; 
+		xfer->q = xferq;
+		xfer->act_type = FWACT_XFER;
+		xfer->act.hand = fw_asy_callback;
+		xfer->retry_req = fw_asybusy;
+			
+		err = uiomove(xfer->send.buf, uio->uio_resid, uio);
+		if(err){
+			return err;
+		}
+		fw_asystart(xfer);
+		err = tsleep((caddr_t)xfer, FWPRI, "fw_write", hz);
+		if(xfer->resp == EBUSY)
+			return EBUSY;
+		fw_xfer_free( xfer);
+		return err;
+	}
+	return EINVAL;
+}
+/*
+ * transmitter buffer update.
+ */
+int
+fw_tbuf_update(struct firewire_comm *fc, int sub, int flag){
+	struct fw_bulkxfer *bulkxfer, *bulkxfer2 = NULL;
+	struct fw_dvbuf *dvbuf = NULL;
+	struct fw_xferq *it;
+	int s, err = 0, i, j, chtag;
+	struct fw_pkt *fp;
+	u_int64_t tmpsync, dvsync;
+
+	it = fc->it[sub];
+	
+	s = splfw();
+	if(it->stdma == NULL){
+		bulkxfer = STAILQ_FIRST(&it->stvalid);
+	}else if(flag != 0){
+		bulkxfer = STAILQ_FIRST(&it->stvalid);
+		if(bulkxfer == it->stdma){
+			STAILQ_REMOVE_HEAD(&it->stvalid, link);
+			it->stdma->flag = 0;
+			STAILQ_INSERT_TAIL(&it->stfree, it->stdma, link);
+			if(!(it->flag & FWXFERQ_DV))
+				wakeup(it);
+		}
+		bulkxfer = STAILQ_FIRST(&it->stvalid);
+	}else{
+		bulkxfer = it->stdma;
+	}
+	splx(s);
+	if(bulkxfer != NULL){
+		s = splfw();
+		bulkxfer2 = STAILQ_NEXT(bulkxfer, link);
+#if 0
+		if(it->flag & FWXFERQ_DV && bulkxfer2 == NULL){
+			bulkxfer2 = STAILQ_FIRST(&it->stfree);
+			STAILQ_REMOVE_HEAD(&it->stfree, link);
+			splx(s);
+			bcopy(bulkxfer->buf, bulkxfer2->buf,
+					it->psize * it->btpacket);
+			s = splfw();
+			STAILQ_INSERT_TAIL(&it->stvalid, bulkxfer2, link);
+		}
+#endif
+		splx(s);
+	}
+	it->stdma = bulkxfer;
+	it->stdma2 = bulkxfer2;
+
+	if(it->flag & FWXFERQ_DV){
+		chtag = it->flag & 0xff;
+dvloop:
+		if(it->dvdma == NULL){
+			dvbuf = STAILQ_FIRST(&it->dvvalid);
+			if(dvbuf != NULL){
+				s = splfw();
+				STAILQ_REMOVE_HEAD(&it->dvvalid, link);
+				it->dvdma = dvbuf;
+				splx(s);
+				it->queued = 0;
+			}
+		}
+		if(it->dvdma == NULL)
+			return err;
+
+		it->stproc = STAILQ_FIRST(&it->stfree);
+		if(it->stproc != NULL){
+			s = splfw();
+			STAILQ_REMOVE_HEAD(&it->stfree, link);
+			splx(s);
+		}else{
+			return err;
+		}
+/*
+ * Insert least significant 12 bits timestamp value by computation. 
+ * Highest significant 4 bits is insert at just before packet sending.
+ */
+		fp = (struct fw_pkt *)(it->stproc->buf);
+/* XXX: Parameter relies on NTSC type DV video */
+		tmpsync = (u_int64_t)3072 * 8000 * 100 / 2997;
+		tmpsync *= it->dvsync;
+		dvsync = tmpsync;
+		dvsync %= 0xc00;
+		fp->mode.ld[2] = htonl(0x80000000 | (dvsync % 0xc00));
+		it->dvsync ++;
+		it->dvsync %= 2997;
+
+		for( i = 0, j = 0 ; i < it->dvpacket ; i++){
+			bcopy(it->dvdma->buf + it->queued * it->psize,
+				it->stproc->buf + j * it->psize, it->psize);
+			fp = (struct fw_pkt *)(it->stproc->buf + j * it->psize);
+			fp->mode.stream.len = htons(488);
+			fp->mode.stream.chtag = chtag;
+			fp->mode.stream.tcode = FWTCODE_STREAM;
+			fp->mode.ld[1] = htonl((fc->nodeid << 24) | 0x00780000 | it->dvdbc);
+			it->dvdbc++;
+			it->dvdbc %= 256;
+			it->queued ++;
+			j++;
+/* XXX: Parameter relies on NTSC type DV video */
+#if 1
+#define DVDIFF 203
+#define DVFRAC 2997
+#else
+#define DVDIFF 127
+#define DVFRAC 1875
+#endif
+			it->dvdiff += DVDIFF;
+			if(it->dvdiff >= DVFRAC){
+				it->dvdiff %= DVFRAC;
+				fp = (struct fw_pkt *)(it->stproc->buf + j * it->psize);
+
+				fp->mode.stream.len = htons(0x8);
+				fp->mode.stream.chtag = chtag;
+				fp->mode.stream.tcode = FWTCODE_STREAM;
+				fp->mode.ld[1] = htonl((fc->nodeid << 24) | 
+					 0x00780000 | it->dvdbc);
+				j++;
+			}
+		}
+		it->stproc->npacket = j;
+		s = splfw();
+		STAILQ_INSERT_TAIL(&it->stvalid, it->stproc, link);
+		splx(s);
+		if(it->queued >= it->dvpacket){
+			s = splfw();
+			STAILQ_INSERT_TAIL(&it->dvfree, it->dvdma, link);
+			it->dvdma = NULL;
+			splx(s);
+			wakeup(it);
+			goto dvloop;
+		}
+	}
+	return err;
+}
+/*
+ * receving buffer update.
+ */
+int
+fw_rbuf_update(struct firewire_comm *fc, int sub, int flag){
+	struct fw_bulkxfer *bulkxfer, *bulkxfer2 = NULL;
+	struct fw_xferq *ir;
+	int s, err = 0;
+
+	ir = fc->ir[sub];
+	s = splfw();
+	if(ir->stdma != NULL){
+		if(flag != 0){
+			STAILQ_INSERT_TAIL(&ir->stvalid, ir->stdma, link);
+		}else{
+			ir->stdma->flag = 0;
+			STAILQ_INSERT_TAIL(&ir->stfree, ir->stdma, link);
+		}
+	}
+	if(ir->stdma2 != NULL){
+		bulkxfer = ir->stdma2;
+		bulkxfer2 = STAILQ_FIRST(&ir->stfree);
+		if(bulkxfer2 != NULL){
+			STAILQ_REMOVE_HEAD(&ir->stfree, link);
+		}
+	}else{
+		bulkxfer = STAILQ_FIRST(&ir->stfree);
+		if(bulkxfer != NULL){
+			STAILQ_REMOVE_HEAD(&ir->stfree, link);
+			bulkxfer2 = STAILQ_FIRST(&ir->stfree);
+			if(bulkxfer2 != NULL){
+				STAILQ_REMOVE_HEAD(&ir->stfree, link);
+			}
+		}else{
+			bulkxfer = STAILQ_FIRST(&ir->stvalid);
+			STAILQ_REMOVE_HEAD(&ir->stvalid, link);
+		}
+	}
+	splx(s);
+	ir->stdma = bulkxfer;
+	ir->stdma2 = bulkxfer2;
+	return err;
+}
+/*
+ * ioctl support.
+ */
+int
+fw_ioctl (dev_t dev, u_long cmd, caddr_t data, int flag, fw_proc *td)
+{
+	struct firewire_softc *sc;
+	int unit = DEV2UNIT(dev);
+	int sub = DEV2DMACH(dev);
+	int i, len, err = 0;
+	struct fw_device *fwdev;
+	struct fw_bind *fwb;
+	struct fw_xferq *ir, *it;
+	struct fw_xfer *xfer;
+	struct fw_pkt *fp;
+
+	struct fw_devlstreq *fwdevlst = (struct fw_devlstreq *)data;
+	struct fw_asyreq *asyreq = (struct fw_asyreq *)data;
+	struct fw_isochreq *ichreq = (struct fw_isochreq *)data;
+	struct fw_isobufreq *ibufreq = (struct fw_isobufreq *)data;
+	struct fw_asybindreq *bindreq = (struct fw_asybindreq *)data;
+#if 0
+	struct fw_map_buf *map_buf = (struct fw_map_buf *)data;
+#endif
+	struct fw_crom_buf *crom_buf = (struct fw_crom_buf *)data;
+
+	if (DEV_FWMEM(dev))
+		return fwmem_ioctl(dev, cmd, data, flag, td);
+
+	sc = devclass_get_softc(firewire_devclass, unit);
+	if (!data)
+		return(EINVAL);
+
+	switch (cmd) {
+	case FW_STSTREAM:
+		sc->fc->it[sub]->flag &= ~0xff;
+		sc->fc->it[sub]->flag |= (0x3f & ichreq->ch);
+		sc->fc->it[sub]->flag |= ((0x3 & ichreq->tag) << 6);
+		err = 0;
+		break;
+	case FW_GTSTREAM:
+		ichreq->ch = sc->fc->it[sub]->flag & 0x3f;
+		ichreq->tag =(sc->fc->it[sub]->flag) >> 2 & 0x3;
+		err = 0;
+		break;
+	case FW_SRSTREAM:
+		sc->fc->ir[sub]->flag &= ~0xff;
+		sc->fc->ir[sub]->flag |= (0x3f & ichreq->ch);
+		sc->fc->ir[sub]->flag |= ((0x3 & ichreq->tag) << 6);
+		err = sc->fc->irx_enable(sc->fc, sub);
+		break;
+	case FW_GRSTREAM:
+		ichreq->ch = sc->fc->ir[sub]->flag & 0x3f;
+		ichreq->tag =(sc->fc->ir[sub]->flag) >> 2 & 0x3;
+		err = 0;
+		break;
+	case FW_SSTDV:
+		ibufreq = (struct fw_isobufreq *)
+			malloc(sizeof(struct fw_isobufreq), M_DEVBUF, M_NOWAIT);
+		if(ibufreq == NULL){
+			err = ENOMEM;
+			break;
+		}
+#define FWDVPACKET 250
+#define FWDVPMAX 512
+		ibufreq->rx.nchunk = 8;
+		ibufreq->rx.npacket = 50;
+		ibufreq->rx.psize = FWDVPMAX;
+
+		ibufreq->tx.nchunk = 5;
+		ibufreq->tx.npacket = 300;
+		ibufreq->tx.psize = FWDVPMAX;
+
+		err = fw_ioctl(dev, FW_SSTBUF, (caddr_t)ibufreq, flag, td);
+		sc->fc->it[sub]->dvpacket = FWDVPACKET;
+		free(ibufreq, M_DEVBUF);
+/* reserve a buffer space */
+#define NDVCHUNK 8
+		sc->fc->it[sub]->dvproc = NULL;
+		sc->fc->it[sub]->dvdma = NULL;
+		sc->fc->it[sub]->flag |= FWXFERQ_DV;
+		sc->fc->it[sub]->dvbuf
+			= (struct fw_dvbuf *)malloc(sizeof(struct fw_dvbuf) * NDVCHUNK, M_DEVBUF, M_DONTWAIT);
+		STAILQ_INIT(&sc->fc->it[sub]->dvvalid);
+		STAILQ_INIT(&sc->fc->it[sub]->dvfree);
+		for( i = 0 ; i < NDVCHUNK ; i++){
+			sc->fc->it[sub]->dvbuf[i].buf
+				= malloc(FWDVPMAX * sc->fc->it[sub]->dvpacket, M_DEVBUF, M_DONTWAIT);
+			STAILQ_INSERT_TAIL(&sc->fc->it[sub]->dvfree,
+					&sc->fc->it[sub]->dvbuf[i], link);
+		}
+		break;
+	case FW_SSTBUF:
+		ir = sc->fc->ir[sub];
+		it = sc->fc->it[sub];
+
+		if(ir->flag & FWXFERQ_RUNNING || it->flag & FWXFERQ_RUNNING){
+			return(EBUSY);
+		}
+		if((ir->flag & FWXFERQ_EXTBUF) || (it->flag & FWXFERQ_EXTBUF)){
+			return(EBUSY);
+		}
+		if((ibufreq->rx.nchunk *
+			ibufreq->rx.psize * ibufreq->rx.npacket) +
+		   (ibufreq->tx.nchunk *
+			ibufreq->tx.psize * ibufreq->tx.npacket) <= 0){
+				return(EINVAL);
+		}
+		if(ibufreq->rx.nchunk > FWSTMAXCHUNK ||
+				ibufreq->tx.nchunk > FWSTMAXCHUNK){
+			return(EINVAL);
+		}
+		ir->bulkxfer
+			= (struct fw_bulkxfer *)malloc(sizeof(struct fw_bulkxfer) * ibufreq->rx.nchunk, M_DEVBUF, M_DONTWAIT);
+		if(ir->bulkxfer == NULL){
+			return(ENOMEM);
+		}
+		it->bulkxfer
+			= (struct fw_bulkxfer *)malloc(sizeof(struct fw_bulkxfer) * ibufreq->tx.nchunk, M_DEVBUF, M_DONTWAIT);
+		if(it->bulkxfer == NULL){
+			return(ENOMEM);
+		}
+		ir->buf = malloc(
+			ibufreq->rx.nchunk * ibufreq->rx.npacket
+			* ((ibufreq->rx.psize + 3) &~3),
+			M_DEVBUF, M_DONTWAIT);
+		if(ir->buf == NULL){
+			free(ir->bulkxfer, M_DEVBUF);
+			free(it->bulkxfer, M_DEVBUF);
+			ir->bulkxfer = NULL;
+			it->bulkxfer = NULL;
+			it->buf = NULL;
+			return(ENOMEM);
+		}
+		it->buf = malloc(
+			ibufreq->tx.nchunk * ibufreq->tx.npacket
+			* ((ibufreq->tx.psize + 3) &~3),
+			M_DEVBUF, M_DONTWAIT);
+		if(it->buf == NULL){
+			free(ir->bulkxfer, M_DEVBUF);
+			free(it->bulkxfer, M_DEVBUF);
+			free(ir->buf, M_DEVBUF);
+			ir->bulkxfer = NULL;
+			it->bulkxfer = NULL;
+			it->buf = NULL;
+			return(ENOMEM);
+		}
+
+		ir->bnchunk = ibufreq->rx.nchunk;
+		ir->bnpacket = ibufreq->rx.npacket;
+		ir->btpacket = ibufreq->rx.npacket;
+		ir->psize = (ibufreq->rx.psize + 3) & ~3;
+		ir->queued = 0;
+
+		it->bnchunk = ibufreq->tx.nchunk;
+		it->bnpacket = ibufreq->tx.npacket;
+		it->btpacket = ibufreq->tx.npacket;
+		it->psize = (ibufreq->tx.psize + 3) & ~3;
+		ir->queued = 0;
+		it->dvdbc = 0;
+		it->dvdiff = 0;
+		it->dvsync = 0;
+
+		STAILQ_INIT(&ir->stvalid);
+		STAILQ_INIT(&ir->stfree);
+		ir->stdma = NULL;
+		ir->stdma2 = NULL;
+		ir->stproc = NULL;
+
+		STAILQ_INIT(&it->stvalid);
+		STAILQ_INIT(&it->stfree);
+		it->stdma = NULL;
+		it->stdma2 = NULL;
+		it->stproc = NULL;
+
+		for(i = 0 ; i < sc->fc->ir[sub]->bnchunk; i++){
+			ir->bulkxfer[i].buf =
+				ir->buf +
+				i * sc->fc->ir[sub]->bnpacket *
+			  	sc->fc->ir[sub]->psize;
+			ir->bulkxfer[i].flag = 0;
+			STAILQ_INSERT_TAIL(&ir->stfree,
+					&ir->bulkxfer[i], link);
+			ir->bulkxfer[i].npacket = ir->bnpacket;
+		}
+		for(i = 0 ; i < sc->fc->it[sub]->bnchunk; i++){
+			it->bulkxfer[i].buf =
+				it->buf +
+				i * sc->fc->it[sub]->bnpacket *
+			  	sc->fc->it[sub]->psize;
+			it->bulkxfer[i].flag = 0;
+			STAILQ_INSERT_TAIL(&it->stfree,
+					&it->bulkxfer[i], link);
+			it->bulkxfer[i].npacket = it->bnpacket;
+		}
+		ir->flag &= ~FWXFERQ_MODEMASK;
+		ir->flag |= FWXFERQ_STREAM;
+		ir->flag |= FWXFERQ_EXTBUF;
+
+		it->flag &= ~FWXFERQ_MODEMASK;
+		it->flag |= FWXFERQ_STREAM;
+		it->flag |= FWXFERQ_EXTBUF;
+		err = 0;
+		break;
+	case FW_GSTBUF:
+		ibufreq->rx.nchunk = sc->fc->ir[sub]->bnchunk;
+		ibufreq->rx.npacket = sc->fc->ir[sub]->bnpacket;
+		ibufreq->rx.psize = sc->fc->ir[sub]->psize;
+
+		ibufreq->tx.nchunk = sc->fc->it[sub]->bnchunk;
+		ibufreq->tx.npacket = sc->fc->it[sub]->bnpacket;
+		ibufreq->tx.psize = sc->fc->it[sub]->psize;
+		break;
+	case FW_ASYREQ:
+		xfer = fw_xfer_alloc();
+		if(xfer == NULL){
+			err = ENOMEM;
+			return err;
+		}
+		fp = &asyreq->pkt;
+		switch (asyreq->req.type) {
+		case FWASREQNODE:
+			xfer->dst = ntohs(fp->mode.hdr.dst);
+			break;
+		case FWASREQEUI:
+			xfer->dst = fw_noderesolve(sc->fc, asyreq->req.dst.eui);
+			if(xfer->dst == FWNODE_INVAL ){
+				printf("%s:cannot found node\n",
+					device_get_nameunit(sc->fc->dev));
+				err = EINVAL;
+				goto error;
+			}
+			fp->mode.hdr.dst = htons(FWLOCALBUS | xfer->dst);
+			break;
+		case FWASRESTL:
+			/* XXX what's this? */
+			break;
+		case FWASREQSTREAM:
+			/* nothing to do */
+			break;
+		}
+		xfer->spd = asyreq->req.sped;
+		xfer->send.len = asyreq->req.len;
+		xfer->send.buf = malloc(xfer->send.len, M_DEVBUF, M_NOWAIT);
+		if(xfer->send.buf == NULL){
+			return ENOMEM;
+		}
+		xfer->send.off = 0; 
+		bcopy(fp, xfer->send.buf, xfer->send.len);
+		xfer->act.hand = fw_asy_callback;
+		err = fw_asyreq(sc->fc, sub, xfer);
+		if(err){
+			fw_xfer_free( xfer);
+			return err;
+		}
+		err = tsleep((caddr_t)xfer, FWPRI, "asyreq", hz);
+		if(err == 0){
+			if(asyreq->req.len >= xfer->recv.len){
+				asyreq->req.len = xfer->recv.len;
+			}else{
+				err = EINVAL;
+			}
+			bcopy(xfer->recv.buf + xfer->recv.off, fp, asyreq->req.len);
+		}
+error:
+		fw_xfer_free( xfer);
+		break;
+	case FW_IBUSRST:
+		sc->fc->ibr(sc->fc);
+		break;
+	case FW_CBINDADDR:
+		fwb = fw_bindlookup(sc->fc,
+				bindreq->start.hi, bindreq->start.lo);
+		if(fwb == NULL){
+			err = EINVAL;
+			break;
+		}
+		STAILQ_REMOVE(&sc->fc->binds, fwb, fw_bind, fclist);
+		STAILQ_REMOVE(&sc->fc->ir[sub]->binds, fwb, fw_bind, chlist);
+		free(fwb, M_DEVBUF);
+		break;
+	case FW_SBINDADDR:
+		if(bindreq->len <= 0 ){
+			err = EINVAL;
+			break;
+		}
+		if(bindreq->start.hi > 0xffff ){
+			err = EINVAL;
+			break;
+		}
+		fwb = (struct fw_bind *)malloc(sizeof (struct fw_bind), M_DEVBUF, M_DONTWAIT);
+		if(fwb == NULL){
+			err = ENOMEM;
+			break;
+		}
+		fwb->start_hi = bindreq->start.hi;
+		fwb->start_lo = bindreq->start.lo;
+		fwb->addrlen = bindreq->len;
+
+		xfer = fw_xfer_alloc();
+		if(xfer == NULL){
+			err = ENOMEM;
+			return err;
+		}
+		xfer->act_type = FWACT_CH;
+		xfer->sub = sub;
+		xfer->fc = sc->fc;
+
+		fwb->xfer = xfer;
+		err = fw_bindadd(sc->fc, fwb);
+		break;
+	case FW_GDEVLST:
+		i = 0;
+		for(fwdev = TAILQ_FIRST(&sc->fc->devices); fwdev != NULL;
+			fwdev = TAILQ_NEXT(fwdev, link)){
+			if(i < fwdevlst->n){
+				fwdevlst->dst[i] = fwdev->dst;
+				fwdevlst->status[i] = 
+					(fwdev->status == FWDEVATTACHED)?1:0;
+				fwdevlst->eui[i].hi = fwdev->eui.hi;
+				fwdevlst->eui[i].lo = fwdev->eui.lo;
+			}
+			i++;
+		}
+		fwdevlst->n = i;
+		break;
+	case FW_GTPMAP:
+		bcopy(sc->fc->topology_map, data,
+				(sc->fc->topology_map->crc_len + 1) * 4);
+		break;
+	case FW_GSPMAP:
+		/* speed_map is larger than a page */
+		err = copyout(sc->fc->speed_map, *(void **)data,
+				(sc->fc->speed_map->crc_len + 1) * 4);
+		break;
+	case FW_GCROM:
+		for (fwdev = TAILQ_FIRST(&sc->fc->devices); fwdev != NULL;
+			fwdev = TAILQ_NEXT(fwdev, link)) {
+			if (fwdev->eui.hi == crom_buf->eui.hi && 
+					fwdev->eui.lo == crom_buf->eui.lo)
+				break;
+		}
+		if (fwdev == NULL) {
+			err = FWNODE_INVAL;
+			break;
+		}
+#if 0
+		if (fwdev->csrrom[0] >> 24 == 1)
+			len = 4;
+		else
+			len = (1 + ((fwdev->csrrom[0] >> 16) & 0xff)) * 4;
+#else
+		if (fwdev->rommax < CSRROMOFF)
+			len = 0;
+		else
+			len = fwdev->rommax - CSRROMOFF + 4;
+#endif
+		if (crom_buf->len < len)
+			len = crom_buf->len;
+		else
+			crom_buf->len = len;
+		err = copyout(&fwdev->csrrom[0], crom_buf->ptr, len);
+		break;
+	default:
+		sc->fc->ioctl (dev, cmd, data, flag, td);
+		break;
+	}
+	return err;
+}
+int
+fw_poll(dev_t dev, int events, fw_proc *td)
+{
+	int revents;
+	int tmp;
+	int unit = DEV2UNIT(dev);
+	int sub = DEV2DMACH(dev);
+	struct firewire_softc *sc;
+
+	if (DEV_FWMEM(dev))
+		return fwmem_poll(dev, events, td);
+
+	sc = devclass_get_softc(firewire_devclass, unit);
+	revents = 0;
+	tmp = POLLIN | POLLRDNORM;
+	if (events & tmp) {
+		if (STAILQ_FIRST(&sc->fc->ir[sub]->q) != NULL)
+			revents |= tmp;
+		else
+			selrecord(td, &sc->fc->ir[sub]->rsel);
+	}
+	tmp = POLLOUT | POLLWRNORM;
+	if (events & tmp) {
+		/* XXX should be fixed */	
+		revents |= tmp;
+	}
+
+	return revents;
+}
+
+/*
+ * To lookup node id. from EUI64.
+ */
+u_int16_t fw_noderesolve(struct firewire_comm *fc, struct fw_eui64 eui)
+{
+	struct fw_device *fwdev;
+	for(fwdev = TAILQ_FIRST(&fc->devices); fwdev != NULL;
+		fwdev = TAILQ_NEXT(fwdev, link)){
+		if(fwdev->eui.hi == eui.hi && fwdev->eui.lo == eui.lo){
+			break;
+		}
+	}
+	if(fwdev == NULL) return FWNODE_INVAL;
+	if(fwdev->status != FWDEVATTACHED) return FWNODE_INVAL;
+	return fwdev->dst;
+}
+/*
+ * Async. request procedure for userland application.
+ */
+int
+fw_asyreq(struct firewire_comm *fc, int sub, struct fw_xfer *xfer)
+{
+	int err = 0;
+	struct fw_xferq *xferq;
+	int tl = 0, len;
+	struct fw_pkt *fp;
+	int tcode;
+	struct tcode_info *info;
+
+	if(xfer == NULL) return EINVAL;
+	if(xfer->send.len > fc->maxrec){
+		printf("send.len > maxrec\n");
+		return EINVAL;
+	}
+	if(xfer->act.hand == NULL){
+		printf("act.hand == NULL\n");
+		return EINVAL;
+	}
+	fp = (struct fw_pkt *)xfer->send.buf;
+
+#if 0
+	switch(fp->mode.common.tcode){
+	case FWTCODE_STREAM:
+		len = ntohs(fp->mode.stream.len) + 4;
+		break;
+	case FWTCODE_RREQQ:
+	case FWTCODE_WRES:
+	case FWTCODE_PHY:
+		len = 12;
+		break;
+	case FWTCODE_WREQQ:
+	case FWTCODE_RRESQ:
+		len = 16;
+		break;
+	default:
+		len = ntohs(fp->mode.rresb.len) + 16;
+		break;
+	}
+	if( len >  xfer->send.len ){
+		printf("len > send.len\n");
+		return EINVAL; 
+	}
+	switch(fp->mode.common.tcode){
+	case FWTCODE_WREQQ:
+	case FWTCODE_WREQB:
+	case FWTCODE_RREQQ:
+	case FWTCODE_RREQB:
+	case FWTCODE_LREQ:
+	case FWTCODE_PHY:
+	case FWTCODE_STREAM:
+		xferq = fc->atq;
+		break;
+	case FWTCODE_WRES:
+	case FWTCODE_RRESQ:
+	case FWTCODE_RRESB:
+	case FWTCODE_LRES:
+		xferq = fc->ats;
+		break;
+	default:
+		return EINVAL;
+	}
+#else
+	tcode = fp->mode.common.tcode & 0xf;
+	info = &fc->tcode[tcode];
+	if (info->flag == 0) {
+		printf("invalid tcode=%d\n", tcode);
+		return EINVAL;
+	}
+	if (info->flag & FWTI_REQ)
+		xferq = fc->atq;
+	else
+		xferq = fc->ats;
+	len = info->hdr_len;
+	if (info->flag & FWTI_BLOCK_STR)
+		len += ntohs(fp->mode.stream.len);
+	else if (info->flag & FWTI_BLOCK_ASY)
+		len += ntohs(fp->mode.rresb.len);
+	if( len >  xfer->send.len ){
+		printf("len(%d) > send.len(%d) (tcode=%d)\n",
+				len, xfer->send.len, tcode);
+		return EINVAL; 
+	}
+	xfer->send.len = len;
+#endif
+	if(xferq->start == NULL){
+		printf("xferq->start == NULL\n");
+		return EINVAL;
+	}
+	if(!(xferq->queued < xferq->maxq)){
+		printf("%s:Discard a packet (queued=%d)\n",
+			device_get_nameunit(fc->dev), xferq->queued);
+		return EINVAL;
+	}
+
+
+#if 0
+	switch(tcode){
+	case FWTCODE_WREQQ:
+	case FWTCODE_WREQB:
+	case FWTCODE_RREQQ:
+	case FWTCODE_RREQB:
+	case FWTCODE_LREQ:
+		if((tl = fw_get_tlabel(fc, xfer)) == -1 ){
+			return EIO;
+		}
+		fp->mode.hdr.tlrt = tl << 2;
+		break;
+	default:
+		break;
+	}
+#else
+	if (info->flag & FWTI_TLABEL) {
+		if((tl = fw_get_tlabel(fc, xfer)) == -1 )
+			return EIO;
+		fp->mode.hdr.tlrt = tl << 2;
+	}
+#endif
+
+	xfer->tl = tl;
+	xfer->tcode = tcode;
+	xfer->resp = 0;
+	xfer->fc = fc;
+	xfer->q = xferq;
+	xfer->act_type = FWACT_XFER;
+	xfer->retry_req = fw_asybusy;
+
+	fw_asystart(xfer);
+	return err;
+}
+/*
+ * Wakeup blocked process.
+ */
+void
+fw_asy_callback(struct fw_xfer *xfer){
+	wakeup(xfer);
+	return;
+}
+/*
+ * Postpone to later retry.
+ */
+void fw_asybusy(struct fw_xfer *xfer){
+#if 0
+	printf("fw_asybusy\n");
+#endif
+#if XFER_TIMEOUT
+	untimeout(fw_xfer_timeout, (void *)xfer, xfer->ch);
+#endif
+/*
+	xfer->ch =  timeout((timeout_t *)fw_asystart, (void *)xfer, 20000);
+*/
+	DELAY(20000);
+	fw_asystart(xfer);
+	return;
+}
+#if XFER_TIMEOUT
+/*
+ * Post timeout for async. request.
+ */
+void
+fw_xfer_timeout(void *arg)
+{
+	int s;
+	struct fw_xfer *xfer;
+
+	xfer = (struct fw_xfer *)arg;
+	printf("fw_xfer_timeout status=%d resp=%d\n", xfer->state, xfer->resp);
+	/* XXX set error code */
+	s = splfw();
+	xfer->act.hand(xfer);
+	splx(s);
+}
+#endif
+/*
+ * Async. request with given xfer structure.
+ */
+static void fw_asystart(struct fw_xfer *xfer){
+	struct firewire_comm *fc = xfer->fc;
+	int s;
+	if(xfer->retry++ >= fc->max_asyretry){
+		xfer->resp = EBUSY;
+		xfer->state = FWXF_BUSY;
+		xfer->act.hand(xfer);
+		return;
+	}
+#if 0 /* XXX allow bus explore packets only after bus rest */
+	if (fc->status < FWBUSEXPLORE) {
+		xfer->resp = EAGAIN;
+		xfer->state = FWXF_BUSY;
+		if (xfer->act.hand != NULL)
+			xfer->act.hand(xfer);
+		return;
+	}
+#endif
+	s = splfw();
+	xfer->state = FWXF_INQ;
+	STAILQ_INSERT_TAIL(&xfer->q->q, xfer, link);
+	xfer->q->queued ++;
+	splx(s);
+	/* XXX just queue for mbuf */
+	if (xfer->mbuf == NULL)
+		xfer->q->start(fc);
+#if XFER_TIMEOUT
+	if (xfer->act.hand != NULL)
+		xfer->ch = timeout(fw_xfer_timeout, (void *)xfer, hz);
+#endif
+	return;
+}
+static int
+fw_mmap (dev_t dev, vm_offset_t offset, int nproto)
+{  
+	struct firewire_softc *fc;
+	int unit = DEV2UNIT(dev);
+
+	if (DEV_FWMEM(dev))
+		return fwmem_mmap(dev, offset, nproto);
+
+	fc = devclass_get_softc(firewire_devclass, unit);
+
+	return EINVAL;
+}
+static int
+firewire_match( device_t dev )
+{
+	device_set_desc(dev, "IEEE1394(Firewire) bus");
+	return -140;
+}
+/*
+ * The attach routine.
+ */
+static int
+firewire_attach( device_t dev )
+{
+	int i, unitmask, mn;
+	struct firewire_softc *sc = device_get_softc(dev);
+	device_t pa = device_get_parent(dev);
+	struct firewire_comm *fc;
+	dev_t d;
+
+	fc = (struct firewire_comm *)device_get_softc(pa);
+	sc->fc = fc;
+	sc->fc->dev = dev;
+
+	unitmask = UNIT2MIN(device_get_unit(dev));
+
+	if( fc->nisodma > FWMAXNDMA) fc->nisodma = FWMAXNDMA;
+	for ( i = 0 ; i < fc->nisodma ; i++ ){
+		mn = unitmask | i;
+		/* XXX device name should be improved */
+		d = make_dev(&firewire_cdevsw, unit2minor(mn),
+			UID_ROOT, GID_OPERATOR, 0770,
+			"fw%x", mn);
+#if __FreeBSD_version >= 500000
+		if (i == 0)
+			sc->dev = d;
+		else
+			dev_depends(sc->dev, d);
+#else
+		sc->dev[i] = d;
+#endif
+	}
+	d = make_dev(&firewire_cdevsw, unit2minor(unitmask | FWMEM_FLAG),
+			UID_ROOT, GID_OPERATOR, 0770,
+			"fwmem%d", device_get_unit(dev));
+#if __FreeBSD_version >= 500000
+	dev_depends(sc->dev, d);
+#else
+	sc->dev[i] = d;
+#endif
+	printf("%s: firewire bus attach\n", device_get_nameunit(sc->fc->dev));
+	sc->fc->timeouthandle = timeout((timeout_t *)sc->fc->timeout, (void *)sc->fc, hz * 10);
+
+	/* Locate our children */
+	bus_generic_probe(dev);
+
+	/* launch attachement of the added children */
+	bus_generic_attach(dev);
+
+	/* bus_reset */
+	fc->ibr(fc);
+
+	return 0;
+}
+
+/*
+ * Attach it as child.
+ */
+static device_t
+firewire_add_child(device_t dev, int order, const char *name, int unit)
+{
+        device_t child;
+	struct firewire_softc *sc;
+
+	sc = (struct firewire_softc *)device_get_softc(dev);
+	child = device_add_child(dev, name, unit);
+	if (child) {
+		device_set_ivars(child, sc->fc);
+		device_probe_and_attach(child);
+	}
+
+	return child;
+}
+/*
+ * Dettach it.
+ */
+static int
+firewire_detach( device_t dev )
+{
+	struct firewire_softc *sc;
+
+	sc = (struct firewire_softc *)device_get_softc(dev);
+#if 0
+	printf("%s:dettach prevented", device_get_nameunit(dev));
+	return(EINVAL);
+#endif
+#if __FreeBSD_version >= 500000
+	destroy_dev(sc->dev);
+#else
+	{
+		int j;
+		for (j = 0 ; j < sc->fc->nisodma + 1; j++)
+			destroy_dev(sc->dev[j]);
+	}
+#endif
+	/* XXX xfree_free and untimeout on all xfers */
+	untimeout((timeout_t *)sc->fc->timeout, sc->fc, sc->fc->timeouthandle);
+	free(sc->fc->topology_map, M_DEVBUF);
+	free(sc->fc->speed_map, M_DEVBUF);
+	bus_generic_detach(dev);
+	return(0);
+}
+#if 0
+static int
+firewire_shutdown( device_t dev )
+{
+	return 0;
+}
+#endif
+/*
+ * Call ater bus reset.
+ */
+void fw_busreset(struct firewire_comm *fc)
+{
+	int i;
+	struct fw_xfer *xfer;
+
+	switch(fc->status){
+	case FWBUSMGRELECT:
+		untimeout((timeout_t *)fw_try_bmr, (void *)fc, fc->bmrhandle);
+		break;
+	default:
+		break;
+	}
+	fc->status = FWBUSRESET;
+/* XXX: discard all queued packet */
+	while((xfer = STAILQ_FIRST(&fc->atq->q)) != NULL){
+		STAILQ_REMOVE_HEAD(&fc->atq->q, link);
+		xfer->resp = EAGAIN;
+		switch(xfer->act_type){
+		case FWACT_XFER:
+			fw_xfer_done(xfer);
+			break;
+		default:
+			break;
+		}
+		fw_xfer_free( xfer);
+	}
+	while((xfer = STAILQ_FIRST(&fc->ats->q)) != NULL){
+		STAILQ_REMOVE_HEAD(&fc->ats->q, link);
+		xfer->resp = EAGAIN;
+		switch(xfer->act_type){
+		case FWACT_XFER:
+			fw_xfer_done(xfer);
+		default:
+			break;
+		}
+		fw_xfer_free( xfer);
+	}
+	for(i = 0; i < fc->nisodma; i++)
+		while((xfer = STAILQ_FIRST(&fc->it[i]->q)) != NULL){
+			STAILQ_REMOVE_HEAD(&fc->it[i]->q, link);
+			xfer->resp = 0;
+			switch(xfer->act_type){
+			case FWACT_XFER:
+				fw_xfer_done(xfer);
+				break;
+			default:
+				break;
+			}
+			fw_xfer_free( xfer);
+		}
+
+	CSRARC(fc, STATE_CLEAR)
+			= 1 << 23 | 0 << 17 | 1 << 16 | 1 << 15 | 1 << 14 ;
+	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
+	CSRARC(fc, NODE_IDS) = 0x3f;
+
+	CSRARC(fc, TOPO_MAP + 8) = 0;
+	fc->irm = -1;
+
+	fc->max_node = -1;
+
+	for(i = 2; i < 0x100/4 - 2 ; i++){
+		CSRARC(fc, SPED_MAP + i * 4) = 0;
+	}
+	CSRARC(fc, STATE_CLEAR) = 1 << 23 | 0 << 17 | 1 << 16 | 1 << 15 | 1 << 14 ;
+	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
+	CSRARC(fc, RESET_START) = 0;
+	CSRARC(fc, SPLIT_TIMEOUT_HI) = 0;
+	CSRARC(fc, SPLIT_TIMEOUT_LO) = 800 << 19;
+	CSRARC(fc, CYCLE_TIME) = 0x0;
+	CSRARC(fc, BUS_TIME) = 0x0;
+	CSRARC(fc, BUS_MGR_ID) = 0x3f;
+	CSRARC(fc, BANDWIDTH_AV) = 4915;
+	CSRARC(fc, CHANNELS_AV_HI) = 0xffffffff;
+	CSRARC(fc, CHANNELS_AV_LO) = 0xffffffff;
+	CSRARC(fc, IP_CHANNELS) = (1 << 31);
+
+	CSRARC(fc, CONF_ROM) = 0x04 << 24;
+	CSRARC(fc, CONF_ROM + 4) = 0x31333934; /* means strings 1394 */
+	CSRARC(fc, CONF_ROM + 8) = 1 << 31 | 1 << 30 | 1 << 29 |
+				1 << 28 | 0xff << 16 | 0x09 << 8;
+	CSRARC(fc, CONF_ROM + 0xc) = 0;
+
+/* DV depend CSRs see blue book */
+	CSRARC(fc, oPCR) &= ~DV_BROADCAST_ON; 
+	CSRARC(fc, iPCR) &= ~DV_BROADCAST_ON; 
+
+	CSRARC(fc, STATE_CLEAR) &= ~(1 << 23 | 1 << 15 | 1 << 14 );
+	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
+}
+/* Call once after reboot */
+void fw_init(fc)
+	struct firewire_comm *fc;
+{
+	int i;
+	struct fw_xfer *xfer;
+	struct fw_bind *fwb;
+	struct csrdir *csrd;
+
+	fc->max_asyretry = FW_MAXASYRTY;
+
+	fc->arq->queued = 0;
+	fc->ars->queued = 0;
+	fc->atq->queued = 0;
+	fc->ats->queued = 0;
+
+	fc->arq->psize = FWPMAX_S400;
+	fc->ars->psize = FWPMAX_S400;
+	fc->atq->psize = FWPMAX_S400;
+	fc->ats->psize = FWPMAX_S400;
+
+
+	fc->arq->buf = NULL;
+	fc->ars->buf = NULL;
+	fc->atq->buf = NULL;
+	fc->ats->buf = NULL;
+
+	fc->arq->flag = FWXFERQ_PACKET;
+	fc->ars->flag = FWXFERQ_PACKET;
+	fc->atq->flag = FWXFERQ_PACKET;
+	fc->ats->flag = FWXFERQ_PACKET;
+
+	STAILQ_INIT(&fc->atq->q);
+	STAILQ_INIT(&fc->ats->q);
+
+	for( i = 0 ; i < fc->nisodma ; i ++ ){
+		fc->it[i]->queued = 0;
+		fc->ir[i]->queued = 0;
+
+		fc->it[i]->start = NULL;
+		fc->ir[i]->start = NULL;
+
+		fc->it[i]->buf = NULL;
+		fc->ir[i]->buf = NULL;
+
+		fc->it[i]->flag = FWXFERQ_STREAM;
+		fc->ir[i]->flag = FWXFERQ_STREAM;
+
+		STAILQ_INIT(&fc->it[i]->q);
+		STAILQ_INIT(&fc->ir[i]->q);
+
+		STAILQ_INIT(&fc->it[i]->binds);
+		STAILQ_INIT(&fc->ir[i]->binds);
+	}
+
+	fc->arq->maxq = FWMAXQUEUE;
+	fc->ars->maxq = FWMAXQUEUE;
+	fc->atq->maxq = FWMAXQUEUE;
+	fc->ats->maxq = FWMAXQUEUE;
+
+	for( i = 0 ; i < fc->nisodma ; i++){
+		fc->ir[i]->maxq = FWMAXQUEUE;
+		fc->it[i]->maxq = FWMAXQUEUE;
+	}
+/* Initialize csr registers */
+	fc->topology_map = (struct fw_topology_map *)malloc(
+				sizeof(struct fw_topology_map),
+				M_DEVBUF, M_DONTWAIT | M_ZERO);
+	fc->speed_map = (struct fw_speed_map *)malloc(
+				sizeof(struct fw_speed_map),
+				M_DEVBUF, M_DONTWAIT | M_ZERO);
+	CSRARC(fc, TOPO_MAP) = 0x3f1 << 16;
+	CSRARC(fc, TOPO_MAP + 4) = 1;
+	CSRARC(fc, SPED_MAP) = 0x3f1 << 16;
+	CSRARC(fc, SPED_MAP + 4) = 1;
+
+	TAILQ_INIT(&fc->devices);
+	STAILQ_INIT(&fc->pending);
+
+/* Initialize csr ROM work space */
+	SLIST_INIT(&fc->ongocsr);
+	SLIST_INIT(&fc->csrfree);
+	for( i = 0 ; i < FWMAXCSRDIR ; i++){
+		csrd = (struct csrdir *) malloc(sizeof(struct csrdir), M_DEVBUF,M_DONTWAIT);
+		if(csrd == NULL) break;
+		SLIST_INSERT_HEAD(&fc->csrfree, csrd, link);
+	}
+
+/* Initialize Async handlers */
+	STAILQ_INIT(&fc->binds);
+	for( i = 0 ; i < 0x40 ; i++){
+		STAILQ_INIT(&fc->tlabels[i]);
+	}
+
+/* DV depend CSRs see blue book */
+#if 0
+	CSRARC(fc, oMPR) = 0x3fff0001; /* # output channel = 1 */
+	CSRARC(fc, oPCR) = 0x8000007a;
+	for(i = 4 ; i < 0x7c/4 ; i+=4){
+		CSRARC(fc, i + oPCR) = 0x8000007a; 
+	}
+ 
+	CSRARC(fc, iMPR) = 0x00ff0001; /* # input channel = 1 */
+	CSRARC(fc, iPCR) = 0x803f0000;
+	for(i = 4 ; i < 0x7c/4 ; i+=4){
+		CSRARC(fc, i + iPCR) = 0x0; 
+	}
+#endif
+
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL) return;
+
+	fwb = (struct fw_bind *)malloc(sizeof (struct fw_bind), M_DEVBUF, M_DONTWAIT);
+	if(fwb == NULL){
+		fw_xfer_free(xfer);
+	}
+	xfer->act.hand = fw_vmaccess;
+	xfer->act_type = FWACT_XFER;
+	xfer->fc = fc;
+	xfer->sc = NULL;
+
+	fwb->start_hi = 0x2;
+	fwb->start_lo = 0;
+	fwb->addrlen = 0xffffffff;
+	fwb->xfer = xfer;
+	fw_bindadd(fc, fwb);
+}
+/*
+ * To lookup binded process from IEEE1394 address.
+ */
+static struct fw_bind *
+fw_bindlookup(fc, dest_hi, dest_lo)
+struct firewire_comm *fc;
+u_int32_t dest_lo, dest_hi;
+{
+	struct fw_bind *tfw;
+	for(tfw = STAILQ_FIRST(&fc->binds) ; tfw != NULL ;
+		tfw = STAILQ_NEXT(tfw, fclist)){
+		if(tfw->xfer->act_type != FWACT_NULL &&
+			tfw->start_hi == dest_hi &&
+			tfw->start_lo <= dest_lo &&
+			(tfw->start_lo + tfw->addrlen) > dest_lo){
+			return(tfw);
+		}
+	}
+	return(NULL);
+}
+/*
+ * To bind IEEE1394 address block to process.
+ */
+int fw_bindadd(struct firewire_comm *fc, struct fw_bind *fwb)
+{
+	struct fw_bind *tfw, *tfw2 = NULL;
+	int err = 0;
+	tfw = STAILQ_FIRST(&fc->binds);
+	if(tfw == NULL){
+		STAILQ_INSERT_HEAD(&fc->binds, fwb, fclist);
+		goto out;
+	}
+	if((tfw->start_hi > fwb->start_hi) ||
+		(tfw->start_hi == fwb->start_hi &&
+		(tfw->start_lo > (fwb->start_lo + fwb->addrlen)))){
+		STAILQ_INSERT_HEAD(&fc->binds, fwb, fclist);
+		goto out;
+	}
+	for(; tfw != NULL; tfw = STAILQ_NEXT(tfw, fclist)){
+		if((tfw->start_hi < fwb->start_hi) ||
+		   (tfw->start_hi == fwb->start_hi &&
+		    (tfw->start_lo + tfw->addrlen) < fwb->start_lo)){
+		   tfw2 = STAILQ_NEXT(tfw, fclist);
+			if(tfw2 == NULL)
+				break;
+			if((tfw2->start_hi > fwb->start_hi) ||
+			   (tfw2->start_hi == fwb->start_hi &&
+			    tfw2->start_lo > (fwb->start_lo + fwb->addrlen))){
+				break;
+			}else{
+				err = EBUSY;
+				goto out;
+			}
+		}
+	}
+	if(tfw != NULL){
+		STAILQ_INSERT_AFTER(&fc->binds, tfw, fwb, fclist);
+	}else{
+		STAILQ_INSERT_TAIL(&fc->binds, fwb, fclist);
+	}
+out:
+	if(!err && fwb->xfer->act_type == FWACT_CH){
+		STAILQ_INSERT_HEAD(&fc->ir[fwb->xfer->sub]->binds, fwb, chlist);
+	}
+	return err;
+}
+
+/*
+ * To free IEEE1394 address block.
+ */
+int fw_bindremove(struct firewire_comm *fc, struct fw_bind *fwb)
+{
+	int s;
+
+	s = splfw();
+	/* shall we check the existance? */
+	STAILQ_REMOVE(&fc->binds, fwb, fw_bind, fclist);
+	splx(s);
+	if (fwb->xfer)
+		fw_xfer_free(fwb->xfer);
+
+	return 0;
+}
+
+/*
+ * To free transaction label.
+ */
+static void fw_tl_free ( struct firewire_comm *fc, struct fw_xfer *xfer )
+{
+	struct tlabel *tl;
+	int s = splfw();
+
+	for( tl = STAILQ_FIRST(&fc->tlabels[xfer->tl]); tl != NULL;
+		tl = STAILQ_NEXT(tl, link)){
+		if(tl->xfer == xfer){
+			STAILQ_REMOVE(&fc->tlabels[xfer->tl], tl, tlabel, link);
+			free(tl, M_DEVBUF);
+			splx(s);
+			return;
+		}
+	}
+	splx(s);
+	return;
+}
+/*
+ * To obtain XFER structure by transaction label.
+ */
+static struct fw_xfer *fw_tl2xfer ( struct firewire_comm *fc, int node, int tlabel )
+{
+	struct fw_xfer *xfer;
+	struct tlabel *tl;
+	int s = splfw();
+
+	for( tl = STAILQ_FIRST(&fc->tlabels[tlabel]); tl != NULL;
+		tl = STAILQ_NEXT(tl, link)){
+		if(tl->xfer->dst == node){
+			xfer = tl->xfer;
+#if 0
+			STAILQ_REMOVE(&fc->tlabels[tlabel], tl, tlabel, link);
+			free(tl, M_DEVBUF);
+#endif
+			splx(s);
+			return(xfer);
+		}
+	}
+	splx(s);
+	return(NULL);
+}
+/*
+ * To allocate IEEE1394 XFER structure.
+ */
+struct fw_xfer *fw_xfer_alloc()
+{
+	struct fw_xfer *xfer;
+#if 0
+	xfer = malloc(sizeof(struct fw_xfer), M_DEVBUF, M_DONTWAIT);
+#else
+	xfer = malloc(sizeof(struct fw_xfer), M_DEVBUF, M_DONTWAIT | M_ZERO);
+#endif
+	if(xfer == NULL) return xfer;
+#if 0 /* xfer->tl = 0 was missing.. */
+	xfer->act_type = FWACT_NULL;
+	xfer->fc = NULL;
+	xfer->retry = 0;
+	xfer->resp = 0;
+	xfer->state = FWXF_INIT;
+	xfer->time = time_second;
+	xfer->sub = -1;
+	xfer->send.buf = NULL;
+	xfer->send.off = 0;
+	xfer->send.len = 0;
+	xfer->recv.buf = NULL;
+	xfer->recv.off = 0;
+	xfer->recv.len = 0;
+	xfer->retry_req = NULL;
+	xfer->act.hand = NULL;
+	xfer->sc = NULL;
+#else
+	xfer->time = time_second;
+	xfer->sub = -1;
+#endif
+	return xfer;
+}
+/*
+ * IEEE1394 XFER post process.
+ */
+void
+fw_xfer_done(struct fw_xfer *xfer)
+{
+	if (xfer->act.hand == NULL)
+		return;
+
+#if XFER_TIMEOUT
+	untimeout(fw_xfer_timeout, (void *)xfer, xfer->ch);
+#endif
+
+	if (xfer->fc->status != FWBUSRESET)
+		xfer->act.hand(xfer);
+	else {
+		printf("fw_xfer_done: pending\n");
+		if (xfer->fc != NULL)
+			STAILQ_INSERT_TAIL(&xfer->fc->pending, xfer, link);
+		else
+			panic("fw_xfer_done: why xfer->fc is NULL?");
+	}
+}
+
+/*
+ * To free IEEE1394 XFER structure. 
+ */
+void fw_xfer_free( struct fw_xfer* xfer)
+{
+	int s;
+	if(xfer == NULL ) return;
+	if(xfer->state == FWXF_INQ){
+		printf("fw_xfer_free FWXF_INQ\n");
+		s = splfw();
+		STAILQ_REMOVE(&xfer->q->q, xfer, fw_xfer, link);
+		xfer->q->queued --;
+		splx(s);
+	}
+	if(xfer->fc != NULL){
+		if(xfer->state == FWXF_START){
+#if 0 /* this could happen if we call fwohci_arcv() before fwohci_txd() */
+			printf("fw_xfer_free FWXF_START\n");
+#endif
+			s = splfw();
+			xfer->q->drain(xfer->fc, xfer);
+			splx(s);
+		}
+	}
+	if(xfer->send.buf != NULL){
+		free(xfer->send.buf, M_DEVBUF);
+	}
+	if(xfer->recv.buf != NULL){
+		free(xfer->recv.buf, M_DEVBUF);
+	}
+	if(xfer->fc != NULL){
+		fw_tl_free(xfer->fc, xfer);
+	}
+	free(xfer, M_DEVBUF);
+}
+
+/*
+ * Callback for PHY configuration. 
+ */
+static void
+fw_phy_config_callback(struct fw_xfer *xfer)
+{
+#if 0
+	printf("phy_config done state=%d resp=%d\n",
+				xfer->state, xfer->resp);
+#endif
+	fw_xfer_free(xfer);
+	/* XXX need bus reset ?? */
+	/* sc->fc->ibr(xfer->fc);  LOOP */
+}
+
+/*
+ * To configure PHY. 
+ */
+static void
+fw_phy_config(struct firewire_comm *fc, int root_node, int gap_count)
+{
+	struct fw_xfer *xfer;
+	struct fw_pkt *fp;
+
+	fc->status = FWBUSPHYCONF;
+
+	DELAY(100000);
+	xfer = fw_xfer_alloc();
+	xfer->send.len = 12;
+	xfer->send.off = 0;
+	xfer->fc = fc;
+	xfer->retry_req = fw_asybusy;
+	xfer->act.hand = fw_phy_config_callback;
+
+	xfer->send.buf = malloc(sizeof(u_int32_t),
+					M_DEVBUF, M_DONTWAIT | M_ZERO);
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.ld[1] = 0;
+	if (root_node >= 0)
+		fp->mode.ld[1] |= htonl((root_node & 0x3f) << 24 | 1 << 23);
+	if (gap_count >= 0)
+		fp->mode.ld[1] |= htonl(1 << 22 | (gap_count & 0x3f) << 16);
+	fp->mode.ld[2] = ~fp->mode.ld[1];
+/* XXX Dangerous, how to pass PHY packet to device driver */
+	fp->mode.common.tcode |= FWTCODE_PHY;
+
+	printf("send phy_config root_node=%d gap_count=%d\n",
+						root_node, gap_count);
+	fw_asyreq(fc, -1, xfer);
+}
+
+#if 0
+/*
+ * Dump self ID. 
+ */
+static void
+fw_print_sid(u_int32_t sid)
+{
+#if 0
+	printf("node:%d link:%d gap:%d spd:%d del:%d con:%d pwr:%d"
+		" p0:%d p1:%d p2:%d i:%d m:%d\n",
+		FWPHYSIDNODE(sid), FWPHYSIDLINK(sid), FWPHYSIDGAP(sid),
+		FWPHYSIDSPD(sid), FWPHYSIDDEL(sid), FWPHYSIDCON(sid),
+		FWPHYSIDPWR(sid), FWPHYSIDP0(sid), FWPHYSIDP1(sid),
+		FWPHYSIDP2(sid), FWPHYSIDIR(sid), FWPHYSIDMORE(sid));
+#else
+	union fw_self_id *s;
+	s = (union fw_self_id *) &sid;
+	printf("node:%d link:%d gap:%d spd:%d del:%d con:%d pwr:%d"
+		" p0:%d p1:%d p2:%d i:%d m:%d\n",
+		s->p0.phy_id, s->p0.link_active, s->p0.gap_count,
+		s->p0.phy_speed, s->p0.phy_delay, s->p0.contender,
+		s->p0.power_class, s->p0.port0, s->p0.port1,
+		s->p0.port2, s->p0.initiated_reset, s->p0.more_packets);
+#endif
+}
+#endif
+
+/*
+ * To receive self ID. 
+ */
+void fw_sidrcv(struct firewire_comm* fc, caddr_t buf, u_int len, u_int off)
+{
+	u_int32_t *p, *sid = (u_int32_t *)(buf + off);
+	union fw_self_id *self_id;
+	u_int i, j, node, c_port = 0, i_branch = 0;
+
+	fc->sid_cnt = len /(sizeof(u_int32_t) * 2);
+	fc->status = FWBUSINIT;
+	fc->max_node = fc->nodeid & 0x3f;
+	CSRARC(fc, NODE_IDS) = ((u_int32_t)fc->nodeid) << 16;
+	fc->status = FWBUSCYMELECT;
+	fc->topology_map->crc_len = 2;
+	fc->topology_map->generation ++;
+	fc->topology_map->self_id_count = 0;
+	fc->topology_map->node_count = 0;
+	fc->speed_map->generation ++;
+	fc->speed_map->crc_len = 1 + (64*64 + 3) / 4;
+	self_id = &fc->topology_map->self_id[0];
+	for(i = 0; i < fc->sid_cnt; i ++){
+		if (sid[1] != ~sid[0]) {
+			printf("fw_sidrcv: invalid self-id packet\n");
+			sid += 2;
+			continue;
+		}
+		*self_id = *((union fw_self_id *)sid);
+		fc->topology_map->crc_len++;
+		if(self_id->p0.sequel == 0){
+			fc->topology_map->node_count ++;
+			c_port = 0;
+#if 0
+			fw_print_sid(sid[0]);
+#endif
+			node = self_id->p0.phy_id;
+			if(fc->max_node < node){
+				fc->max_node = self_id->p0.phy_id;
+			}
+			/* XXX I'm not sure this is the right speed_map */
+			fc->speed_map->speed[node][node]
+					= self_id->p0.phy_speed;
+			for (j = 0; j < node; j ++) {
+				fc->speed_map->speed[j][node]
+					= fc->speed_map->speed[node][j]
+					= min(fc->speed_map->speed[j][j],
+							self_id->p0.phy_speed);
+			}
+			if ((fc->irm == -1 || self_id->p0.phy_id > fc->irm) &&
+			  (self_id->p0.link_active && self_id->p0.contender)) {
+				fc->irm = self_id->p0.phy_id;
+			}
+			if(self_id->p0.port0 >= 0x2){
+				c_port++;
+			}
+			if(self_id->p0.port1 >= 0x2){
+				c_port++;
+			}
+			if(self_id->p0.port2 >= 0x2){
+				c_port++;
+			}
+		}
+		if(c_port > 2){
+			i_branch += (c_port - 2);
+		}
+		sid += 2;
+		self_id++;
+		fc->topology_map->self_id_count ++;
+	}
+	printf("%s: %d nodes", device_get_nameunit(fc->dev), fc->max_node + 1);
+	/* CRC */
+	fc->topology_map->crc = fw_crc16(
+			(u_int32_t *)&fc->topology_map->generation,
+			fc->topology_map->crc_len * 4);
+	fc->speed_map->crc = fw_crc16(
+			(u_int32_t *)&fc->speed_map->generation,
+			fc->speed_map->crc_len * 4);
+	/* byteswap and copy to CSR */
+	p = (u_int32_t *)fc->topology_map;
+	for (i = 0; i <= fc->topology_map->crc_len; i++)
+		CSRARC(fc, TOPO_MAP + i * 4) = htonl(*p++);
+	p = (u_int32_t *)fc->speed_map;
+	CSRARC(fc, SPED_MAP) = htonl(*p++);
+	CSRARC(fc, SPED_MAP + 4) = htonl(*p++);
+	/* don't byte-swap u_int8_t array */
+	bcopy(p, &CSRARC(fc, SPED_MAP + 8), (fc->speed_map->crc_len - 1)*4);
+
+	fc->max_hop = fc->max_node - i_branch;
+#if 1
+	printf(", maxhop <= %d", fc->max_hop);
+#endif
+		
+	if(fc->irm == -1 ){
+		printf(", Not found IRM capable node");
+	}else{
+		printf(", cable IRM = %d", fc->irm);
+		if (fc->irm == fc->nodeid)
+			printf(" (me)\n");
+		else
+			printf("\n");
+	}
+
+	if((fc->irm != -1) && (CSRARC(fc, BUS_MGR_ID) == 0x3f) ){
+		if(fc->irm == ((CSRARC(fc, NODE_IDS) >> 16 ) & 0x3f)){
+			fc->status = FWBUSMGRDONE;
+			CSRARC(fc, BUS_MGR_ID) = fc->set_bmr(fc, fc->irm);
+		}else{
+			fc->status = FWBUSMGRELECT;
+			fc->bmrhandle = timeout((timeout_t *)fw_try_bmr,(void *)fc, hz / 8);
+		}
+	}else{
+		fc->status = FWBUSMGRDONE;
+		printf("%s: BMR = %x\n", device_get_nameunit(fc->dev), CSRARC(fc, BUS_MGR_ID));
+	}
+	free(buf, M_DEVBUF);
+#if 1
+	/* XXX optimize gap_count, if I am BMGR */
+	if(fc->irm == ((CSRARC(fc, NODE_IDS) >> 16 ) & 0x3f)){
+		fw_phy_config(fc, -1, gap_cnt[fc->max_hop]);
+	}
+#endif
+#if 1
+	timeout((timeout_t *)fw_bus_probe, (void *)fc, hz/4);
+#else
+	fw_bus_probe(fc);
+#endif
+}
+/*
+ * To probe devices on the IEEE1394 bus. 
+ */
+static void fw_bus_probe(struct firewire_comm *fc)
+{
+	int s;
+	struct fw_device *fwdev, *next;
+
+	s = splfw();
+	fc->status = FWBUSEXPLORE;
+	fc->retry_count = 0;
+
+/*
+ * Invalidate all devices, just after bus reset. Devices 
+ * to be removed has not been seen longer time.
+ */
+	for(fwdev = TAILQ_FIRST(&fc->devices); fwdev != NULL; fwdev = next) {
+		next = TAILQ_NEXT(fwdev, link);
+		if(fwdev->status != FWDEVINVAL){
+			fwdev->status = FWDEVINVAL;
+			fwdev->rcnt = 0;
+		}else if(fwdev->rcnt < FW_MAXDEVRCNT){
+			fwdev->rcnt ++;
+		}else{
+			TAILQ_REMOVE(&fc->devices, fwdev, link);
+			free(fwdev, M_DEVBUF);
+		}
+	}
+	fc->ongonode = 0;
+	fc->ongoaddr = CSRROMOFF;
+	fc->ongodev = NULL;
+	fc->ongoeui.hi = 0xffffffff; fc->ongoeui.lo = 0xffffffff;
+	fw_bus_explore(fc);
+	splx(s);
+}
+/*
+ * To collect device informations on the IEEE1394 bus. 
+ */
+static void fw_bus_explore(struct firewire_comm *fc )
+{
+	int err = 0;
+	struct fw_device *fwdev, *tfwdev;
+	u_int32_t addr;
+	struct fw_xfer *xfer;
+	struct fw_pkt *fp;
+
+	if(fc->status != FWBUSEXPLORE)
+		return;
+
+loop:
+	if(fc->ongonode == fc->nodeid) fc->ongonode++;
+
+	if(fc->ongonode > fc->max_node) goto done;
+	if(fc->ongonode >= 0x3f) goto done;
+
+	/* check link */
+	/* XXX we need to check phy_id first */
+	if (!fc->topology_map->self_id[fc->ongonode].p0.link_active) {
+		printf("fw_bus_explore: node %d link down\n", fc->ongonode);
+		fc->ongonode++;
+		goto loop;
+	}
+
+	if(fc->ongoaddr <= CSRROMOFF &&
+		fc->ongoeui.hi == 0xffffffff &&
+		fc->ongoeui.lo == 0xffffffff ){
+		fc->ongoaddr = CSRROMOFF;
+		addr = 0xf0000000 | fc->ongoaddr;
+	}else if(fc->ongoeui.hi == 0xffffffff ){
+		fc->ongoaddr = CSRROMOFF + 0xc;
+		addr = 0xf0000000 | fc->ongoaddr;
+	}else if(fc->ongoeui.lo == 0xffffffff ){
+		fc->ongoaddr = CSRROMOFF + 0x10;
+		addr = 0xf0000000 | fc->ongoaddr;
+	}else if(fc->ongodev == NULL){
+		for(fwdev = TAILQ_FIRST(&fc->devices); fwdev != NULL;
+			fwdev = TAILQ_NEXT(fwdev, link)){
+			if(fwdev->eui.hi == fc->ongoeui.hi && fwdev->eui.lo == fc->ongoeui.lo){
+				break;
+			}
+		}
+		if(fwdev != NULL){
+			fwdev->dst = fc->ongonode;
+			fwdev->status = FWDEVATTACHED;
+			fc->ongonode++;
+			fc->ongoaddr = CSRROMOFF;
+			fc->ongodev = NULL;
+			fc->ongoeui.hi = 0xffffffff; fc->ongoeui.lo = 0xffffffff;
+			goto loop;
+		}
+		fwdev = malloc(sizeof(struct fw_device), M_DEVBUF, M_DONTWAIT);
+		if(fwdev == NULL)
+			return;
+		fwdev->rommax = 0;
+		fwdev->dst = fc->ongonode;
+		fwdev->eui.hi = fc->ongoeui.hi; fwdev->eui.lo = fc->ongoeui.lo;
+		fwdev->status = FWDEVINIT;
+#if 0
+		fwdev->speed = CSRARC(fc, SPED_MAP + 8 + fc->ongonode / 4)
+			>> ((3 - (fc->ongonode % 4)) * 8);
+#else
+		fwdev->speed = fc->speed_map->speed[fc->nodeid][fc->ongonode];
+#endif
+
+#if 0
+		TAILQ_INSERT_TAIL(&fc->devices, fwdev, link);
+#else
+		tfwdev = TAILQ_FIRST(&fc->devices);
+		while( tfwdev != NULL &&
+			(tfwdev->eui.hi > fwdev->eui.hi) &&
+			((tfwdev->eui.hi == fwdev->eui.hi) &&
+				tfwdev->eui.lo > fwdev->eui.lo)){
+			tfwdev = TAILQ_NEXT( tfwdev, link);
+		}
+		if(tfwdev == NULL){
+			TAILQ_INSERT_TAIL(&fc->devices, fwdev, link);
+		}else{
+			TAILQ_INSERT_BEFORE(tfwdev, fwdev, link);
+		}
+#endif
+
+		printf("%s:Discover new %s device ID:%08x%08x\n", device_get_nameunit(fc->dev), linkspeed[fwdev->speed], fc->ongoeui.hi, fc->ongoeui.lo);
+
+		fc->ongodev = fwdev;
+		fc->ongoaddr = CSRROMOFF;
+		addr = 0xf0000000 | fc->ongoaddr;
+	}else{
+		addr = 0xf0000000 | fc->ongoaddr;
+	}
+#if 0
+	xfer = asyreqq(fc, FWSPD_S100, 0, 0,
+		((FWLOCALBUS | fc->ongonode) << 16) | 0xffff , addr,
+		fw_bus_explore_callback);
+	if(xfer == NULL) goto done;
+#else
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		goto done;
+	}
+	xfer->send.len = 16;
+	xfer->spd = 0;
+	xfer->send.buf = malloc(16, M_DEVBUF, M_DONTWAIT);
+	if(xfer->send.buf == NULL){
+		fw_xfer_free( xfer);
+		return;
+	}
+
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.rreqq.dest_hi = htons(0xffff);
+	fp->mode.rreqq.tlrt = 0;
+	fp->mode.rreqq.tcode = FWTCODE_RREQQ;
+	fp->mode.rreqq.pri = 0;
+	fp->mode.rreqq.src = 0;
+	xfer->dst = FWLOCALBUS | fc->ongonode;
+	fp->mode.rreqq.dst = htons(xfer->dst);
+	fp->mode.rreqq.dest_lo = htonl(addr);
+	xfer->act.hand = fw_bus_explore_callback;
+
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return;
+	}
+#endif
+	return;
+done:
+	/* fw_attach_devs */
+	fc->status = FWBUSEXPDONE;
+	printf("bus_explore done\n");
+	fw_attach_dev(fc);
+	return;
+
+}
+/* Portable Async. request read quad */
+struct fw_xfer *asyreqq(struct firewire_comm *fc,
+	u_int8_t spd, u_int8_t tl, u_int8_t rt,
+	u_int32_t addr_hi, u_int32_t addr_lo,
+	void (*hand) __P((struct fw_xfer*)))
+{
+	struct fw_xfer *xfer;
+	struct fw_pkt *fp;
+	int err;
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		return NULL;
+	}
+	xfer->send.len = 16;
+	xfer->spd = spd; /* XXX:min(spd, fc->spd) */
+	xfer->send.buf = malloc(16, M_DEVBUF, M_DONTWAIT);
+	if(xfer->send.buf == NULL){
+		fw_xfer_free( xfer);
+		return NULL;
+	}
+
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.rreqq.dest_hi = htons(addr_hi & 0xffff);
+	if(tl & FWP_TL_VALID){
+		fp->mode.rreqq.tlrt = (tl & 0x3f) << 2;
+	}else{
+		fp->mode.rreqq.tlrt = 0;
+	}
+	fp->mode.rreqq.tlrt |= rt & 0x3;
+	fp->mode.rreqq.tcode = FWTCODE_RREQQ;
+	fp->mode.rreqq.pri = 0;
+	fp->mode.rreqq.src = 0;
+	xfer->dst = addr_hi >> 16;
+	fp->mode.rreqq.dst = htons(xfer->dst);
+	fp->mode.rreqq.dest_lo = htonl(addr_lo);
+	xfer->act.hand = hand;
+
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return NULL;
+	}
+	return xfer;
+}
+/*
+ * Callback for the IEEE1394 bus information collection. 
+ */
+static void fw_bus_explore_callback(struct fw_xfer *xfer){
+	struct firewire_comm *fc;
+	struct fw_pkt *sfp,*rfp;
+	struct csrhdr *chdr;
+	struct csrdir *csrd;
+	struct csrreg *csrreg;
+	u_int32_t offset;
+
+	
+	if(xfer == NULL) return;
+	fc = xfer->fc;
+	if(xfer->resp != 0){
+		printf("resp != 0: node=%d addr=0x%x\n",
+			fc->ongonode, fc->ongoaddr);
+		fc->retry_count++;
+		goto nextnode;
+	}
+
+	if(xfer->send.buf == NULL){
+		printf("send.buf == NULL: node=%d addr=0x%x\n",
+			fc->ongonode, fc->ongoaddr);
+		printf("send.buf == NULL\n");
+		fc->retry_count++;
+		goto nextnode;
+	}
+	sfp = (struct fw_pkt *)xfer->send.buf;
+
+	if(xfer->recv.buf == NULL){
+		printf("recv.buf == NULL: node=%d addr=0x%x\n",
+			fc->ongonode, fc->ongoaddr);
+		fc->retry_count++;
+		goto nextnode;
+	}
+	rfp = (struct fw_pkt *)xfer->recv.buf;
+#if 0
+	{
+		u_int32_t *qld;
+		int i;
+		qld = (u_int32_t *)xfer->recv.buf;
+		printf("len:%d\n", xfer->recv.len);
+		for( i = 0 ; i <= xfer->recv.len && i < 32; i+= 4){
+			printf("0x%08x ", ntohl(rfp->mode.ld[i/4]));
+			if((i % 16) == 15) printf("\n");
+		}
+		if((i % 16) != 15) printf("\n");
+	}
+#endif
+	if(fc->ongodev == NULL){
+		if(sfp->mode.rreqq.dest_lo == htonl((0xf0000000 | CSRROMOFF))){
+			rfp->mode.rresq.data = ntohl(rfp->mode.rresq.data);
+			chdr = (struct csrhdr *)(&rfp->mode.rresq.data);
+/* If CSR is minimul confinguration, more investgation is not needed. */
+			if(chdr->info_len == 1){
+				goto nextnode;
+			}else{
+				fc->ongoaddr = CSRROMOFF + 0xc;
+			}
+		}else if(sfp->mode.rreqq.dest_lo == htonl((0xf0000000 |(CSRROMOFF + 0xc)))){
+			fc->ongoeui.hi = ntohl(rfp->mode.rresq.data);
+			fc->ongoaddr = CSRROMOFF + 0x10;
+		}else if(sfp->mode.rreqq.dest_lo == htonl((0xf0000000 |(CSRROMOFF + 0x10)))){
+			fc->ongoeui.lo = ntohl(rfp->mode.rresq.data);
+			if (fc->ongoeui.hi == 0 && fc->ongoeui.lo == 0)
+				goto nextnode;
+			fc->ongoaddr = CSRROMOFF;
+		}
+	}else{
+		fc->ongodev->csrrom[(fc->ongoaddr - CSRROMOFF)/4] = ntohl(rfp->mode.rresq.data);
+		if(fc->ongoaddr > fc->ongodev->rommax){
+			fc->ongodev->rommax = fc->ongoaddr;
+		}
+		csrd = SLIST_FIRST(&fc->ongocsr);
+		if((csrd = SLIST_FIRST(&fc->ongocsr)) == NULL){
+			chdr = (struct csrhdr *)(fc->ongodev->csrrom);
+			offset = CSRROMOFF;
+		}else{
+			chdr = (struct csrhdr *)&fc->ongodev->csrrom[(csrd->off - CSRROMOFF)/4];
+			offset = csrd->off;
+		}
+		if(fc->ongoaddr > (CSRROMOFF + 0x14) && fc->ongoaddr != offset){
+			csrreg = (struct csrreg *)&fc->ongodev->csrrom[(fc->ongoaddr - CSRROMOFF)/4];
+			if( csrreg->key == 0x81 || csrreg->key == 0xd1){
+				csrd = SLIST_FIRST(&fc->csrfree);
+				if(csrd == NULL){
+					goto nextnode;
+				}else{
+					csrd->ongoaddr = fc->ongoaddr;
+					fc->ongoaddr += csrreg->val * 4;
+					csrd->off = fc->ongoaddr;
+					SLIST_REMOVE_HEAD(&fc->csrfree, link);
+					SLIST_INSERT_HEAD(&fc->ongocsr, csrd, link);
+					goto nextaddr;
+				}
+			}
+		}
+		fc->ongoaddr += 4;
+		if(((fc->ongoaddr - offset)/4 > chdr->crc_len) &&
+				(fc->ongodev->rommax < 0x414)){
+			if(fc->ongodev->rommax <= 0x414){
+				csrd = SLIST_FIRST(&fc->csrfree);
+				if(csrd == NULL) goto nextnode;
+				csrd->off = fc->ongoaddr;
+				csrd->ongoaddr = fc->ongoaddr;
+				SLIST_REMOVE_HEAD(&fc->csrfree, link);
+				SLIST_INSERT_HEAD(&fc->ongocsr, csrd, link);
+			}
+			goto nextaddr;
+		}
+
+		while(((fc->ongoaddr - offset)/4 > chdr->crc_len)){
+			if(csrd == NULL){
+				goto nextnode;
+			};
+			fc->ongoaddr = csrd->ongoaddr + 4;
+			SLIST_REMOVE_HEAD(&fc->ongocsr, link);
+			SLIST_INSERT_HEAD(&fc->csrfree, csrd, link);
+			csrd = SLIST_FIRST(&fc->ongocsr);
+			if((csrd = SLIST_FIRST(&fc->ongocsr)) == NULL){
+				chdr = (struct csrhdr *)(fc->ongodev->csrrom);
+				offset = CSRROMOFF;
+			}else{
+				chdr = (struct csrhdr *)&(fc->ongodev->csrrom[(csrd->off - CSRROMOFF)/4]);
+				offset = csrd->off;
+			}
+		}
+		if((fc->ongoaddr - CSRROMOFF) > CSRROMSIZE){
+			goto nextnode;
+		}
+	}
+nextaddr:
+	fw_xfer_free( xfer);
+	fw_bus_explore(fc);
+	return;
+nextnode:
+	fw_xfer_free( xfer);
+	fc->ongonode++;
+/* housekeeping work space */
+	fc->ongoaddr = CSRROMOFF;
+	fc->ongodev = NULL;
+	fc->ongoeui.hi = 0xffffffff; fc->ongoeui.lo = 0xffffffff;
+	while((csrd = SLIST_FIRST(&fc->ongocsr)) != NULL){
+		SLIST_REMOVE_HEAD(&fc->ongocsr, link);
+		SLIST_INSERT_HEAD(&fc->csrfree, csrd, link);
+	}
+	fw_bus_explore(fc);
+	return;
+}
+/*
+ * Async. write responce support for kernel internal use. 
+ */
+int fw_writeres(struct firewire_comm *fc, u_int32_t dst, u_int32_t tlrt){
+	int err = 0;
+	struct fw_xfer *xfer;
+	struct fw_pkt *fp;
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		err = ENOMEM;
+		return err;
+	}
+	xfer->send.len = 12;
+	xfer->spd = 0;
+	xfer->send.buf = malloc(xfer->send.len, M_DEVBUF, M_NOWAIT);
+	if(xfer->send.buf == NULL){
+		return ENOMEM;
+	}
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	 
+	fp->mode.wres.tlrt = tlrt;
+	fp->mode.wres.tcode = FWTCODE_WRES;
+	fp->mode.wres.pri = 0;
+	fp->mode.wres.dst = htons(dst);
+
+	xfer->act.hand = fw_asy_callback;
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return err;
+	}
+	err = tsleep((caddr_t)xfer, FWPRI, "asyreq", 0);
+	fw_xfer_free( xfer);
+
+	return err;
+}
+/*
+ * Async. read responce block support for kernel internal use. 
+ */
+int fw_readresb(struct firewire_comm *fc, u_int32_t dst, u_int32_t tlrt, u_int32_t len, u_int32_t *buf){
+	int err = 0;
+	struct fw_xfer *xfer ;
+	struct fw_pkt *fp;
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		err = ENOMEM;
+		return err;
+	}
+	xfer->send.len = sizeof(struct fw_pkt) + len;
+	xfer->spd = 0;
+	xfer->send.buf = malloc(sizeof(struct fw_pkt) + 1024, M_DEVBUF, M_DONTWAIT);
+	if(xfer->send.buf == NULL){
+		return ENOMEM;
+	}
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.rresb.tlrt = tlrt;
+	fp->mode.rresb.tcode = FWTCODE_RRESB;
+	fp->mode.rresb.pri = 0;
+	fp->mode.rresb.dst = htons(dst);
+	fp->mode.rresb.rtcode = 0;
+	fp->mode.rresb.extcode = 0;
+	fp->mode.rresb.len = htons(len);
+	bcopy(buf, fp->mode.rresb.payload, len);
+	xfer->act.hand = fw_asy_callback;
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return err;
+	}
+	err = tsleep((caddr_t)xfer, FWPRI, "asyreq", 0);
+
+	fw_xfer_free( xfer);
+	return err;
+}
+/*
+ * Async. write request block support for kernel internal use. 
+ */
+int fw_writereqb(struct firewire_comm *fc, u_int32_t addr_hi, u_int32_t addr_lo, u_int len, u_int32_t *buf){
+	int err = 0;
+	struct fw_xfer *xfer ;
+	struct fw_pkt *fp;
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		err = ENOMEM;
+		return err;
+	}
+	xfer->send.len = sizeof(struct fw_pkt) + len;
+	xfer->spd = 0;
+	xfer->send.buf = malloc(sizeof(struct fw_pkt) + 1024, M_DEVBUF, M_DONTWAIT);
+	if(xfer->send.buf == NULL){
+		return ENOMEM;
+	}
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.wreqb.dest_hi = htonl(addr_hi & 0xffff);
+	fp->mode.wreqb.tlrt = 0;
+	fp->mode.wreqb.tcode = FWTCODE_WREQB;
+	fp->mode.wreqb.pri = 0;
+	fp->mode.wreqb.dst = htons(addr_hi >> 16);
+	fp->mode.wreqb.dest_lo = htonl(addr_lo);
+	fp->mode.wreqb.len = htons(len);
+	fp->mode.wreqb.extcode = 0;
+	bcopy(buf, fp->mode.wreqb.payload, len);
+	xfer->act.hand = fw_asy_callback;
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return err;
+	}
+	err = tsleep((caddr_t)xfer, FWPRI, "asyreq", 0);
+
+	fw_xfer_free( xfer);
+	return err;
+}
+/*
+ * Async. read request support for kernel internal use. 
+ */
+int fw_readreqq(struct firewire_comm *fc, u_int32_t addr_hi, u_int32_t addr_lo, u_int32_t *ret){
+	int err = 0;
+	struct fw_xfer *xfer ;
+	struct fw_pkt *fp, *rfp;
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		err = ENOMEM;
+		return err;
+	}
+	xfer->send.len = 16;
+	xfer->spd = 0;
+	xfer->send.buf = malloc(16, M_DEVBUF, M_DONTWAIT);
+	if(xfer->send.buf == NULL){
+		return ENOMEM;
+	}
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.rreqq.dest_hi = htonl(addr_hi & 0xffff);
+	fp->mode.rreqq.tlrt = 0;
+	fp->mode.rreqq.tcode = FWTCODE_RREQQ;
+	fp->mode.rreqq.pri = 0;
+	xfer->dst = addr_hi >> 16;
+	fp->mode.rreqq.dst = htons(xfer->dst);
+	fp->mode.rreqq.dest_lo = htonl(addr_lo);
+	xfer->act.hand = fw_asy_callback;
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return err;
+	}
+	err = tsleep((caddr_t)xfer, FWPRI, "asyreq", 0);
+
+	if(err == 0 && xfer->recv.buf != NULL){
+		rfp = (struct fw_pkt *)xfer->recv.buf;
+		*ret = ntohl(rfp->mode.rresq.data);
+	}
+	fw_xfer_free( xfer);
+	return err;
+}
+/*
+ * To obtain CSR register values.
+ */
+u_int32_t getcsrdata(struct fw_device *fwdev, u_int8_t key)
+{
+	int i;
+	struct csrhdr *chdr;
+	struct csrreg *creg;
+	chdr = (struct csrhdr *)&fwdev->csrrom[0];
+	for( i = chdr->info_len + 4; i <= fwdev->rommax - CSRROMOFF; i+=4){
+		creg = (struct csrreg *)&fwdev->csrrom[i/4];
+		if(creg->key == key){
+			return (u_int32_t)creg->val;
+		}
+	}
+	return 0;
+}
+/*
+ * To attach sub-devices layer onto IEEE1394 bus.
+ */
+static void fw_attach_dev(struct firewire_comm *fc)
+{
+	struct fw_device *fwdev;
+	struct fw_xfer *xfer;
+	int i, err;
+	device_t *devlistp;
+	int devcnt;
+	struct firewire_dev_comm *fdc;
+
+	for(fwdev = TAILQ_FIRST(&fc->devices); fwdev != NULL;
+			fwdev = TAILQ_NEXT(fwdev, link)){
+		if(fwdev->status == FWDEVINIT){
+			fwdev->spec = getcsrdata(fwdev, CSRKEY_SPEC);
+			if(fwdev->spec == 0)
+				continue;
+			fwdev->ver = getcsrdata(fwdev, CSRKEY_VER);
+			if(fwdev->ver == 0)
+				continue;
+			fwdev->maxrec = (fwdev->csrrom[2] >> 12) & 0xf;
+
+			switch(fwdev->spec){
+			case CSRVAL_ANSIT10:
+				switch(fwdev->ver){
+				case CSRVAL_T10SBP2:
+					printf("Device SBP-II");
+					break;
+				default:
+					break;
+				}
+				break;
+			case CSRVAL_1394TA:
+				switch(fwdev->ver){
+				case CSR_PROTAVC:
+					printf("Device AV/C");
+					break;
+				case CSR_PROTCAL:
+					printf("Device CAL");
+					break;
+				case CSR_PROTEHS:
+					printf("Device EHS");
+					break;
+				case CSR_PROTHAVI:
+					printf("Device HAVi");
+					break;
+				case CSR_PROTCAM104:
+					printf("Device 1394 Cam 1.04");
+					break;
+				case CSR_PROTCAM120:
+					printf("Device 1394 Cam 1.20");
+					break;
+				case CSR_PROTCAM130:
+					printf("Device 1394 Cam 1.30");
+					break;
+				case CSR_PROTDPP:
+					printf("Device 1394 Direct print");
+					break;
+				case CSR_PROTIICP:
+					printf("Device Industrial & Instrument");
+					break;
+				default:
+					printf("Device unkwon 1394TA");
+					break;
+				}
+				break;
+			default:
+				break;
+			}
+			fwdev->status = FWDEVATTACHED;
+			printf("\n");
+		}
+	}
+	err = device_get_children(fc->dev, &devlistp, &devcnt);
+	if( err != 0 )
+		return;
+	for( i = 0 ; i < devcnt ; i++){
+		if (device_get_state(devlistp[i]) >= DS_ATTACHED)  {
+			fdc = device_get_softc(devlistp[i]);
+			if (fdc->post_explore != NULL)
+				fdc->post_explore(fdc);
+		}
+	}
+	free(devlistp, M_TEMP);
+
+	/* call pending handlers */
+	i = 0;
+	while ((xfer = STAILQ_FIRST(&fc->pending))) {
+		STAILQ_REMOVE_HEAD(&fc->pending, link);
+		i++;
+		if (xfer->act.hand)
+			xfer->act.hand(xfer);
+	}
+	if (i > 0)
+		printf("fw_attach_dev: %d pending handlers called\n", i);
+	if (fc->retry_count > 0) {
+		printf("retry_count = %d\n", fc->retry_count);
+		fc->retry_probe_handle = timeout((timeout_t *)fc->ibr,
+							(void *)fc, hz*2);
+	}
+	return;
+}
+/*
+ * To allocate uniq transaction label.
+ */
+static int fw_get_tlabel(struct firewire_comm *fc, struct fw_xfer *xfer)
+{
+	u_int i;
+	struct tlabel *tl, *tmptl;
+	int s;
+	static u_int32_t label = 0;
+
+	s = splfw();
+	for( i = 0 ; i < 0x40 ; i ++){
+		label = (label + 1) & 0x3f;
+		for(tmptl = STAILQ_FIRST(&fc->tlabels[label]);
+			tmptl != NULL; tmptl = STAILQ_NEXT(tmptl, link)){
+			if(tmptl->xfer->dst == xfer->dst) break;
+		}
+		if(tmptl == NULL) {
+			tl = malloc(sizeof(struct tlabel),M_DEVBUF,M_DONTWAIT);
+			if (tl == NULL) {
+				splx(s);
+				return (-1);
+			}
+			tl->xfer = xfer;
+			STAILQ_INSERT_TAIL(&fc->tlabels[label], tl, link);
+			splx(s);
+			return(label);
+		}
+	}
+	splx(s);
+
+	printf("fw_get_tlabel: no free tlabel\n");
+	return(-1);
+}
+/*
+ * Generic packet receving process.
+ */
+void fw_rcv(struct firewire_comm* fc, caddr_t buf, u_int len, u_int sub, u_int off, u_int spd)
+{
+	struct fw_pkt *fp, *resfp;
+	struct fw_xfer *xfer;
+	struct fw_bind *bind;
+	struct firewire_softc *sc;
+	int s;
+#if 0
+	{
+		u_int32_t *qld;
+		int i;
+		qld = (u_int32_t *)buf;
+		printf("spd %d len:%d\n", spd, len);
+		for( i = 0 ; i <= len && i < 32; i+= 4){
+			printf("0x%08x ", ntohl(qld[i/4]));
+			if((i % 16) == 15) printf("\n");
+		}
+		if((i % 16) != 15) printf("\n");
+	}
+#endif
+	fp = (struct fw_pkt *)(buf + off);
+	switch(fp->mode.common.tcode){
+	case FWTCODE_WRES:
+	case FWTCODE_RRESQ:
+	case FWTCODE_RRESB:
+	case FWTCODE_LRES:
+		xfer = fw_tl2xfer(fc, ntohs(fp->mode.hdr.src),
+					fp->mode.hdr.tlrt >> 2);
+		if(xfer == NULL) {
+			printf("fw_rcv: unknown response "
+					"tcode=%d src=0x%x tl=%x rt=%d data=0x%x\n",
+					fp->mode.common.tcode,
+					ntohs(fp->mode.hdr.src),
+					fp->mode.hdr.tlrt >> 2,
+					fp->mode.hdr.tlrt & 3,
+					fp->mode.rresq.data);
+#if 1
+			printf("try ad-hoc work around!!\n");
+			xfer = fw_tl2xfer(fc, ntohs(fp->mode.hdr.src),
+					(fp->mode.hdr.tlrt >> 2)^3);
+			if (xfer == NULL) {
+				printf("no use...\n");
+				goto err;
+			}
+#else
+			goto err;
+#endif
+		}
+		switch(xfer->act_type){
+		case FWACT_XFER:
+			if((xfer->sub >= 0) &&
+				((fc->ir[xfer->sub]->flag & FWXFERQ_MODEMASK ) == 0)){
+				xfer->resp = EINVAL;
+				fw_xfer_done(xfer);
+				goto err;
+			}
+			xfer->recv.len = len;
+			xfer->recv.off = off;
+			xfer->recv.buf = buf;
+			xfer->resp = 0;
+			fw_xfer_done(xfer);
+			return;
+			break;
+		case FWACT_CH:
+		default:
+			goto err;
+			break;
+		}
+		break;
+	case FWTCODE_WREQQ:
+	case FWTCODE_WREQB:
+	case FWTCODE_RREQQ:
+	case FWTCODE_RREQB:
+	case FWTCODE_LREQ:
+		bind = fw_bindlookup(fc, ntohs(fp->mode.rreqq.dest_hi),
+			ntohl(fp->mode.rreqq.dest_lo));
+		if(bind == NULL){
+			printf("Unknown service addr 0x%08x:0x%08x tcode=%x\n",
+				ntohs(fp->mode.rreqq.dest_hi),
+				ntohl(fp->mode.rreqq.dest_lo),
+				fp->mode.common.tcode);
+			if (fc->status == FWBUSRESET) {
+				printf("fw_rcv: cannot response(bus reset)!\n");
+				goto err;
+			}
+			xfer = fw_xfer_alloc();
+			if(xfer == NULL){
+				return;
+			}
+			xfer->spd = spd;
+			xfer->send.buf = malloc(16, M_DEVBUF, M_DONTWAIT);
+			resfp = (struct fw_pkt *)xfer->send.buf;
+			switch(fp->mode.common.tcode){
+			case FWTCODE_WREQQ:
+			case FWTCODE_WREQB:
+				resfp->mode.hdr.tcode = FWTCODE_WRES;
+				xfer->send.len = 12;
+				break;
+			case FWTCODE_RREQQ:
+				resfp->mode.hdr.tcode = FWTCODE_RRESQ;
+				xfer->send.len = 16;
+				break;
+			case FWTCODE_RREQB:
+				resfp->mode.hdr.tcode = FWTCODE_RRESB;
+				xfer->send.len = 16;
+				break;
+			case FWTCODE_LREQ:
+				resfp->mode.hdr.tcode = FWTCODE_LRES;
+				xfer->send.len = 16;
+				break;
+			}
+			resfp->mode.hdr.dst = fp->mode.hdr.src;
+			resfp->mode.hdr.tlrt = fp->mode.hdr.tlrt;
+			resfp->mode.hdr.pri = fp->mode.hdr.pri;
+			resfp->mode.rresb.rtcode = 7;
+			resfp->mode.rresb.extcode = 0;
+			resfp->mode.rresb.len = 0;
+/*
+			xfer->act.hand = fw_asy_callback;
+*/
+			xfer->act.hand = fw_xfer_free;
+			if(fw_asyreq(fc, -1, xfer)){
+				fw_xfer_free( xfer);
+				return;
+			}
+			goto err;
+		}
+		switch(bind->xfer->act_type){
+		case FWACT_XFER:
+			xfer = fw_xfer_alloc();
+			if(xfer == NULL) goto err;
+			xfer->fc = bind->xfer->fc;
+			xfer->sc = bind->xfer->sc;
+			xfer->recv.buf = buf;
+			xfer->recv.len = len;
+			xfer->recv.off = off;
+			xfer->spd = spd;
+			xfer->act.hand = bind->xfer->act.hand;
+			if (fc->status != FWBUSRESET)
+				xfer->act.hand(xfer);
+			else
+				STAILQ_INSERT_TAIL(&fc->pending, xfer, link);
+			return;
+			break;
+		case FWACT_CH:
+			if(fc->ir[bind->xfer->sub]->queued >=
+				fc->ir[bind->xfer->sub]->maxq){
+				printf("%s:Discard a packet %x %d\n",
+					device_get_nameunit(fc->dev),
+					bind->xfer->sub,
+					fc->ir[bind->xfer->sub]->queued);
+				goto err;
+			}
+			xfer = fw_xfer_alloc();
+			if(xfer == NULL) goto err;
+			xfer->recv.buf = buf;
+			xfer->recv.len = len;
+			xfer->recv.off = off;
+			xfer->spd = spd;
+			s = splfw();
+			fc->ir[bind->xfer->sub]->queued++;
+			STAILQ_INSERT_TAIL(&fc->ir[bind->xfer->sub]->q, xfer, link);
+			splx(s);
+
+			wakeup((caddr_t)fc->ir[bind->xfer->sub]);
+
+			return;
+			break;
+		default:
+			goto err;
+			break;
+		}
+		break;
+	case FWTCODE_STREAM:
+	{
+		struct fw_xferq *xferq;
+
+		xferq = fc->ir[sub];
+#if 0
+		printf("stream rcv dma %d len %d off %d spd %d\n",
+			sub, len, off, spd);
+#endif
+		if(xferq->queued >= xferq->maxq) {
+			printf("receive queue is full\n");
+			goto err;
+		}
+		xfer = fw_xfer_alloc();
+		if(xfer == NULL) goto err;
+		xfer->recv.buf = buf;
+		xfer->recv.len = len;
+		xfer->recv.off = off;
+		xfer->spd = spd;
+		s = splfw();
+		xferq->queued++;
+		STAILQ_INSERT_TAIL(&xferq->q, xfer, link);
+		splx(s);
+		sc = device_get_softc(fc->bdev);
+#if __FreeBSD_version >= 500000
+		if (SEL_WAITING(&xferq->rsel))
+#else
+		if (&xferq->rsel.si_pid != 0)
+#endif
+			selwakeup(&xferq->rsel);
+		if (xferq->flag & FWXFERQ_WAKEUP) {
+			xferq->flag &= ~FWXFERQ_WAKEUP;
+			wakeup((caddr_t)xferq);
+		}
+		if (xferq->flag & FWXFERQ_HANDLER) {
+			xferq->hand(xferq);
+		}
+		return;
+		break;
+	}
+	default:
+		printf("fw_rcv: unknow tcode\n");
+		break;
+	}
+err:
+	free(buf, M_DEVBUF);
+}
+/*
+ * Post process for Bus Manager election process.
+ */
+static void
+fw_try_bmr_callback(struct fw_xfer *xfer)
+{
+	struct fw_pkt *sfp,*rfp;
+	struct firewire_comm *fc;
+
+	if(xfer == NULL) return;
+	fc = xfer->fc;
+	if(xfer->resp != 0){
+		goto error;
+	}
+
+	if(xfer->send.buf == NULL){
+		goto error;
+	}
+	sfp = (struct fw_pkt *)xfer->send.buf;
+
+	if(xfer->recv.buf == NULL){
+		goto error;
+	}
+	rfp = (struct fw_pkt *)xfer->recv.buf;
+	CSRARC(fc, BUS_MGR_ID)
+		= fc->set_bmr(fc, ntohl(rfp->mode.lres.payload[0]) & 0x3f);
+	printf("%s: new bus manager %d ",
+		device_get_nameunit(fc->dev), CSRARC(fc, BUS_MGR_ID));
+	if((htonl(rfp->mode.lres.payload[0]) & 0x3f) == fc->nodeid){
+		printf("(me)\n");
+/* If I am bus manager, optimize gapcount */
+		if(fc->max_hop <= MAX_GAPHOP ){
+			fw_phy_config(fc, -1, gap_cnt[fc->max_hop]);
+		}
+	}else{
+		printf("\n");
+	}
+error:
+	fw_xfer_free(xfer);
+}
+/*
+ * To candidate Bus Manager election process.
+ */
+void fw_try_bmr(void *arg)
+{
+	struct fw_xfer *xfer;
+	struct firewire_comm *fc = (struct firewire_comm *)arg;
+	struct fw_pkt *fp;
+	int err = 0;
+
+	xfer = fw_xfer_alloc();
+	if(xfer == NULL){
+		return;
+	}
+	xfer->send.len = 24;
+	xfer->spd = 0;
+	xfer->send.buf = malloc(24, M_DEVBUF, M_DONTWAIT);
+	if(xfer->send.buf == NULL){
+		fw_xfer_free( xfer);
+		return;
+	}
+
+	fc->status = FWBUSMGRELECT;
+
+	xfer->send.off = 0; 
+	fp = (struct fw_pkt *)xfer->send.buf;
+	fp->mode.lreq.dest_hi = htons(0xffff);
+	fp->mode.lreq.tlrt = 0;
+	fp->mode.lreq.tcode = FWTCODE_LREQ;
+	fp->mode.lreq.pri = 0;
+	fp->mode.lreq.src = 0;
+	fp->mode.lreq.len = htons(8);
+	fp->mode.lreq.extcode = htons(FW_LREQ_CMPSWAP);
+	xfer->dst = FWLOCALBUS | fc->irm;
+	fp->mode.lreq.dst = htons(xfer->dst);
+	fp->mode.lreq.dest_lo = htonl(0xf0000000 | BUS_MGR_ID);
+	fp->mode.lreq.payload[0] = 0x3f;
+	fp->mode.lreq.payload[1] = fc->nodeid;
+	xfer->act_type = FWACT_XFER;
+	xfer->act.hand = fw_try_bmr_callback;
+
+	err = fw_asyreq(fc, -1, xfer);
+	if(err){
+		fw_xfer_free( xfer);
+		return;
+	}
+	return;
+}
+/*
+ * Software implementation for physical memory block access.
+ * XXX:Too slow, usef for debug purpose only.
+ */
+static void fw_vmaccess(struct fw_xfer *xfer){
+	struct fw_pkt *rfp, *sfp = NULL;
+	u_int32_t *ld = (u_int32_t *)(xfer->recv.buf + xfer->recv.off);
+
+	printf("vmaccess spd:%2x len:%03x %d data:%08x %08x %08x %08x\n",
+			xfer->spd, xfer->recv.len, xfer->recv.off, ntohl(ld[0]), ntohl(ld[1]), ntohl(ld[2]), ntohl(ld[3]));
+	printf("vmaccess          data:%08x %08x %08x %08x\n", ntohl(ld[4]), ntohl(ld[5]), ntohl(ld[6]), ntohl(ld[7]));
+	if(xfer->resp != 0){
+		fw_xfer_free( xfer);
+		return;
+	}
+	if(xfer->recv.buf == NULL){
+		fw_xfer_free( xfer);
+		return;
+	}
+	rfp = (struct fw_pkt *)xfer->recv.buf;
+	switch(rfp->mode.hdr.tcode){
+		/* XXX need fix for 64bit arch */
+		case FWTCODE_WREQB:
+			xfer->send.buf = malloc(12, M_DEVBUF, M_NOWAIT);
+			xfer->send.len = 12;
+			sfp = (struct fw_pkt *)xfer->send.buf;
+			bcopy(rfp->mode.wreqb.payload,
+				(caddr_t)ntohl(rfp->mode.wreqb.dest_lo), ntohs(rfp->mode.wreqb.len));
+			sfp->mode.wres.tcode = FWTCODE_WRES;
+			sfp->mode.wres.rtcode = 0;
+			break;
+		case FWTCODE_WREQQ:
+			xfer->send.buf = malloc(12, M_DEVBUF, M_NOWAIT);
+			xfer->send.len = 12;
+			sfp->mode.wres.tcode = FWTCODE_WRES;
+			*((u_int32_t *)(ntohl(rfp->mode.wreqb.dest_lo))) = rfp->mode.wreqq.data;
+			sfp->mode.wres.rtcode = 0;
+			break;
+		case FWTCODE_RREQB:
+			xfer->send.buf = malloc(16 + rfp->mode.rreqb.len, M_DEVBUF, M_NOWAIT);
+			xfer->send.len = 16 + ntohs(rfp->mode.rreqb.len);
+			sfp = (struct fw_pkt *)xfer->send.buf;
+			bcopy((caddr_t)ntohl(rfp->mode.rreqb.dest_lo),
+				sfp->mode.rresb.payload, (u_int16_t)ntohs(rfp->mode.rreqb.len));
+			sfp->mode.rresb.tcode = FWTCODE_RRESB;
+			sfp->mode.rresb.len = rfp->mode.rreqb.len;
+			sfp->mode.rresb.rtcode = 0;
+			sfp->mode.rresb.extcode = 0;
+			break;
+		case FWTCODE_RREQQ:
+			xfer->send.buf = malloc(16, M_DEVBUF, M_NOWAIT);
+			xfer->send.len = 16;
+			sfp = (struct fw_pkt *)xfer->send.buf;
+			sfp->mode.rresq.data = *(u_int32_t *)(ntohl(rfp->mode.rreqq.dest_lo));
+			sfp->mode.wres.tcode = FWTCODE_RRESQ;
+			sfp->mode.rresb.rtcode = 0;
+			break;
+		default:
+			fw_xfer_free( xfer);
+			return;
+	}
+	xfer->send.off = 0;
+	sfp->mode.hdr.dst = rfp->mode.hdr.src;
+	xfer->dst = ntohs(rfp->mode.hdr.src);
+	xfer->act.hand = fw_xfer_free;
+	xfer->retry_req = fw_asybusy;
+
+	sfp->mode.hdr.tlrt = rfp->mode.hdr.tlrt;
+	sfp->mode.hdr.pri = 0;
+
+	fw_asyreq(xfer->fc, -1, xfer);
+/**/
+	return;
+}
+/*
+ * CRC16 check-sum for IEEE1394 register blocks.
+ */
+u_int16_t fw_crc16(u_int32_t *ptr, u_int32_t len){
+	u_int32_t i, sum, crc = 0;
+	int shift;
+	len = (len + 3) & ~3;
+	for(i = 0 ; i < len ; i+= 4){
+		for( shift = 28 ; shift >= 0 ; shift -= 4){
+			sum = ((crc >> 12) ^ (ptr[i/4] >> shift)) & 0xf;
+			crc = (crc << 4) ^ ( sum << 12 ) ^ ( sum << 5) ^ sum;
+		}
+		crc &= 0xffff;
+	}
+	return((u_int16_t) crc);
+}
+DRIVER_MODULE(firewire,fwohci,firewire_driver,firewire_devclass,0,0);
+MODULE_VERSION(firewire, 1);