/*
 * Copyright 2007, Haiku Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              JiSheng Zhang
 *              Jérôme DUVAL
 */
/*-
 * Copyright (c) 2003 Hidetoshi Shimokawa
 * 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: src/sys/dev/firewire/fwdev.c,v 1.52 2007/06/06 14:31:36 simokawa Exp $
 *
 */

#include <sys/param.h>
#include <sys/types.h>

#include <Drivers.h>
#include <OS.h>
#include <KernelExport.h>
#include <malloc.h>
#include <module.h>
#include <stdio.h>
#include <ByteOrder.h>
#include <string.h>
#include <sys/ioccom.h>

#include "queue.h"
#include "firewire.h"
#include "iec13213.h"
#include "firewirereg.h"
#include "fwdma.h"
//#include "fwmem.h"
#include "iec68113.h"

#define TRACE(x...)
//#define TRACE(x...) dprintf(x)

#include "firewire_module.h"

#define FWNODE_INVAL 0xffff

int32 api_version = B_CUR_DRIVER_API_VERSION;
struct fw_module_info *gFirewire;
const char fwname[] = "bus/fw/%ld";
#define FWNAMEMAX 9
static char ** devices;
uint32 devices_count = 0;


struct fw_drv1 {
        struct firewire_comm *fc;
        struct fw_xferq *ir;
        struct fw_xferq *it;
        struct fw_isobufreq bufreq;
        STAILQ_HEAD(, fw_bind) binds;
        STAILQ_HEAD(, fw_xfer) rq;
        sem_id rqSem;
};

static int
fwdev_allocbuf(struct fw_xferq *q,
        struct fw_bufspec *b)
{
        int i;

        if (q->flag & (FWXFERQ_RUNNING | FWXFERQ_EXTBUF))
                return(EBUSY);

        q->bulkxfer = (struct fw_bulkxfer *) malloc(
                sizeof(struct fw_bulkxfer) * b->nchunk);
        if (q->bulkxfer == NULL)
                return(ENOMEM);

        b->psize = roundup2(b->psize, sizeof(uint32_t));
        q->buf = gFirewire->fwdma_malloc_multiseg(sizeof(uint32_t), 
                        b->psize, b->nchunk * b->npacket);
TRACE("fwdev_allocbuf %d\n", b->psize*b->nchunk*b->npacket);
        if (q->buf == NULL) {
                free(q->bulkxfer);
                q->bulkxfer = NULL;
                return(ENOMEM);
        }
        q->bnchunk = b->nchunk;
        q->bnpacket = b->npacket;
        q->psize = (b->psize + 3) & ~3;
        q->queued = 0;

        STAILQ_INIT(&q->stvalid);
        STAILQ_INIT(&q->stfree);
        STAILQ_INIT(&q->stdma);
        q->stproc = NULL;

        for (i = 0 ; i < q->bnchunk; i++) {
                q->bulkxfer[i].poffset = i * q->bnpacket;
                //q->bulkxfer[i].mbuf = NULL; //to be completed when find mbuf's counterpart
                STAILQ_INSERT_TAIL(&q->stfree, &q->bulkxfer[i], link);
        }

        q->flag &= ~FWXFERQ_MODEMASK;
        q->flag |= FWXFERQ_STREAM;
        q->flag |= FWXFERQ_EXTBUF;

        return (0);
}

static int
fwdev_freebuf(struct fw_xferq *q)
{
        if (q->flag & FWXFERQ_EXTBUF) {
                if (q->buf != NULL)
                        gFirewire->fwdma_free_multiseg(q->buf);
                q->buf = NULL;
                free(q->bulkxfer);
                q->bulkxfer = NULL;
                q->flag &= ~FWXFERQ_EXTBUF;
                q->psize = 0;
                q->maxq = FWMAXQUEUE;
        }
        return (0);
}


static status_t
fw_open (const char *name, uint32 flags, void **cookie)
{
        int32 count = -1;
        int32 i;
        struct fw_drv1 *d;
        struct firewire_softc *sc = NULL;
        
        *cookie = NULL;
        for (i = 0; i < devices_count; i++) {
                if (strcmp(name, devices[i]) == 0) {
                        count = i;
                        break;
                }
        }
        
        if (count < 0) {
                return B_BAD_VALUE;
        }
        
        if (gFirewire->get_handle(count, &sc) != B_OK) {
                return ENODEV;
        }
        
        if (sc == NULL)
                return (ENXIO);

        FW_GLOCK(sc->fc);
        if (*cookie != NULL) {
                FW_GUNLOCK(sc->fc);
                return (EBUSY);
        }
        /* set dummy value for allocation */
        *cookie = (void *)-1;
        FW_GUNLOCK(sc->fc);

        *cookie = malloc(sizeof(struct fw_drv1));
        if (*cookie == NULL)
                return (ENOMEM);
        memset(*cookie, 0, sizeof(struct fw_drv1));

        d = (struct fw_drv1 *)(*cookie);
        d->fc = sc->fc;
        STAILQ_INIT(&d->binds);
        STAILQ_INIT(&d->rq);
        d->rqSem = create_sem(0, "fw_raw rq");
        if (d->rqSem < B_OK) {
                dprintf("fwraw: failed creating rq semaphore\n");
                free(*cookie);
                return B_ERROR;
        }

        return B_OK;    
}


static status_t 
fw_close (void *cookie)
{
        return B_OK;
}


static status_t
fw_free(void *cookie)
{
        struct firewire_comm *fc;
        struct fw_drv1 *d;
        struct fw_xfer *xfer;
        struct fw_bind *fwb;

        TRACE("fw_free\n");
        d = (struct fw_drv1 *)cookie;
        delete_sem(d->rqSem);
        fc = d->fc;

        /* remove binding */
        for (fwb = STAILQ_FIRST(&d->binds); fwb != NULL;
                        fwb = STAILQ_FIRST(&d->binds)) {
                gFirewire->fw_bindremove(fc, fwb);
                STAILQ_REMOVE_HEAD(&d->binds, chlist);
                gFirewire->fw_xferlist_remove(&fwb->xferlist);
                free(fwb);
        }
        if (d->ir != NULL) {
                struct fw_xferq *ir = d->ir;

                if ((ir->flag & FWXFERQ_OPEN) == 0)
                        return (EINVAL);
                if (ir->flag & FWXFERQ_RUNNING) {
                        ir->flag &= ~FWXFERQ_RUNNING;
                        fc->irx_disable(fc, ir->dmach);
                }
                /* free extbuf */
                fwdev_freebuf(ir);
                /* drain receiving buffer */
                for (xfer = STAILQ_FIRST(&ir->q);
                        xfer != NULL; xfer = STAILQ_FIRST(&ir->q)) {
                        ir->queued --;
                        STAILQ_REMOVE_HEAD(&ir->q, link);

                        xfer->resp = 0;
                        gFirewire->fw_xfer_done(xfer);
                }
                ir->flag &= ~(FWXFERQ_OPEN |
                        FWXFERQ_MODEMASK | FWXFERQ_CHTAGMASK);
                d->ir = NULL;

        }
        if (d->it != NULL) {
                struct fw_xferq *it = d->it;

                if ((it->flag & FWXFERQ_OPEN) == 0)
                        return (EINVAL);
                if (it->flag & FWXFERQ_RUNNING) {
                        it->flag &= ~FWXFERQ_RUNNING;
                        fc->itx_disable(fc, it->dmach);
                }
                /* free extbuf */
                fwdev_freebuf(it);
                it->flag &= ~(FWXFERQ_OPEN | FWXFERQ_MODEMASK | FWXFERQ_CHTAGMASK);
                d->it = NULL;
        }
        free(d);
        d = NULL;
        
        return B_OK;
}


static int
fw_read_async(struct fw_drv1 *d, off_t position, void *buf, size_t *num_bytes)
{
        int err = 0;
        struct fw_xfer *xfer;
        struct fw_bind *fwb;
        struct fw_pkt *fp;
        struct tcode_info *tinfo;
        cpu_status s;
        
        int len, pbytes = (int)*num_bytes;//pbytes:to be processed bytes
        *num_bytes = 0;

        FW_GLOCK(d->fc);
        while ((xfer = STAILQ_FIRST(&d->rq)) == NULL && err == B_OK) {
                //err = msleep(&d->rq, FW_GMTX(d->fc), FWPRI, "fwra", 0);
                FW_GUNLOCK(d->fc);
                err = acquire_sem_etc(d->rqSem, 1, B_CAN_INTERRUPT | B_TIMEOUT,
                        B_INFINITE_TIMEOUT);//B_INFINITE_TIMEOUT means no timeout?
                FW_GLOCK(d->fc);
        }

//      if (err != 0) {
        if (err != B_OK) {

                FW_GUNLOCK(d->fc);
                return (err);
        }

        s = splfw();
        STAILQ_REMOVE_HEAD(&d->rq, link);
        FW_GUNLOCK(xfer->fc);
        splx(s);
        fp = &xfer->recv.hdr;
#if 0 /* for GASP ?? */
        if (fc->irx_post != NULL)
                fc->irx_post(fc, fp->mode.ld);
#endif
        tinfo = &xfer->fc->tcode[fp->mode.hdr.tcode];
//      err = uiomove((void *)fp, tinfo->hdr_len, uio);
        len = tinfo->hdr_len;
        len = MIN(len, pbytes);
        err = user_memcpy(buf, fp, len);
        pbytes -= len;
        *num_bytes += len;
        buf = (void *)((caddr_t)buf + len);

//      if (err)
        if (err < B_OK) {
                goto out;
        }
        
//      err = uiomove((void *)xfer->recv.payload, xfer->recv.pay_len, uio);
        len = xfer->recv.pay_len;
        len = MIN(len, pbytes); 
        err = user_memcpy(buf, (void *)xfer->recv.payload, len);
        pbytes -= len;
        *num_bytes += len;//get have been processed bytes num
        buf = (void *)((caddr_t)buf + len);

out:
        /* recycle this xfer */
        fwb = (struct fw_bind *)xfer->sc;
        gFirewire->fw_xfer_unload(xfer);
        xfer->recv.pay_len = B_PAGE_SIZE;
        FW_GLOCK(xfer->fc);
        STAILQ_INSERT_TAIL(&fwb->xferlist, xfer, link);
        FW_GUNLOCK(xfer->fc);
        return (err);
}


/*
 * read request.
 */
static status_t 
fw_read (void *cookie, off_t position, void *buf, size_t *num_bytes)
{
        struct fw_drv1 *d;
        struct fw_xferq *ir;
        struct firewire_comm *fc;
        int err = 0, slept = 0;
        struct fw_pkt *fp;
        cpu_status s;
        
        int len, pbytes = (int)*num_bytes;
        *num_bytes = 0;

        d = (struct fw_drv1 *)cookie;
        fc = d->fc;
        ir = d->ir;

        if (ir == NULL)
                return (fw_read_async(d, position, buf, num_bytes));

        if (ir->buf == NULL)
                return (EIO);

        FW_GLOCK(fc);
readloop:
        if (ir->stproc == NULL) {
                /* iso bulkxfer */
                ir->stproc = STAILQ_FIRST(&ir->stvalid);
                if (ir->stproc != NULL) {
                        s = splfw();
                        STAILQ_REMOVE_HEAD(&ir->stvalid, link);
                        splx(s);
                        ir->queued = 0;
                }
        }
        if (ir->stproc == NULL) {
                /* no data avaliable */
                if (slept == 0) {
                        slept = 1;
                        ir->flag |= FWXFERQ_WAKEUP;
                        //err = msleep(ir, FW_GMTX(fc), FWPRI, "fw_read", hz);
                        FW_GUNLOCK(fc);
                        err = acquire_sem_etc(ir->Sem, 1, B_CAN_INTERRUPT | B_TIMEOUT, 1000000);
                        FW_GLOCK(fc);

                        ir->flag &= ~FWXFERQ_WAKEUP;
                        if (err == B_OK)
                                goto readloop;
                } else if (slept == 1)
                        err = EIO;
                FW_GUNLOCK(fc);
                return err;
        } else if (ir->stproc != NULL) {
                /* iso bulkxfer */
                FW_GUNLOCK(fc);
                fp = (struct fw_pkt *)fwdma_v_addr(ir->buf, 
                                ir->stproc->poffset + ir->queued);
                if (fc->irx_post != NULL)
                        fc->irx_post(fc, fp->mode.ld);
                if (fp->mode.stream.len == 0) {
                        err = EIO;
                        return err;
                }
        //      err = uiomove((caddr_t)fp,
        //              fp->mode.stream.len + sizeof(uint32_t), uio);
                len = fp->mode.stream.len + sizeof(uint32_t);
                len = MIN(len, pbytes);
                err = user_memcpy(buf, (void *)fp, len);
                pbytes -= len;
                *num_bytes += len;
                buf = (void *)((caddr_t)buf + len);

                ir->queued ++;
                if (ir->queued >= ir->bnpacket) {
                        s = splfw();
                        STAILQ_INSERT_TAIL(&ir->stfree, ir->stproc, link);
                        splx(s);
                        fc->irx_enable(fc, ir->dmach);
                        ir->stproc = NULL;
                }
                if (pbytes >= ir->psize) {
                        slept = -1;
                        FW_GLOCK(fc);
                        goto readloop;
                }
        }
        return err;
}


static int
fw_write_async(struct fw_drv1 *d, off_t position, const void *buf,
        size_t *num_bytes)
{
        struct fw_xfer *xfer;
        struct fw_pkt pkt;
        struct tcode_info *tinfo;
        int err;
        
        int len, pbytes = (int)*num_bytes;
        *num_bytes = 0;

        bzero(&pkt, sizeof(struct fw_pkt));
//      if ((err = uiomove((caddr_t)&pkt, sizeof(uint32_t), uio)))
        len = sizeof(uint32_t);
        len = MIN(len, pbytes);
        err = user_memcpy(&pkt, buf, len);
        pbytes -= len;
        *num_bytes += len;
        buf = (void *)((caddr_t)buf + len);
        if (err < B_OK)
                return (err);

        tinfo = &d->fc->tcode[pkt.mode.hdr.tcode];
//      if ((err = uiomove((caddr_t)&pkt + sizeof(uint32_t),
//          tinfo->hdr_len - sizeof(uint32_t), uio)))
        len = tinfo->hdr_len - sizeof(uint32_t);
        len = MIN(len, pbytes);
        err = user_memcpy((void*)((caddr_t)&pkt + sizeof(uint32_t)), 
                        buf, len);
        pbytes -= len;
        *num_bytes += len;
        buf = (void *)((caddr_t)buf + len);

        if (err < B_OK)
                return (err);

        if ((xfer = gFirewire->fw_xfer_alloc_buf(pbytes,
            B_PAGE_SIZE/*XXX*/)) == NULL)
                return (ENOMEM);

        bcopy(&pkt, &xfer->send.hdr, sizeof(struct fw_pkt));
//      xfer->send.pay_len = uio->uio_resid;
        xfer->send.pay_len = pbytes;

/*      if (uio->uio_resid > 0) {
                if ((err = uiomove((caddr_t)&xfer->send.payload[0],
                    uio->uio_resid, uio)));// here the FreeBSD's stack author may be careless?
                        goto out;
        }*/
        if (pbytes > 0) {
                len = pbytes;
                err = user_memcpy((void*)&xfer->send.payload[0], 
                                buf, len);
                pbytes -= len;
                *num_bytes += len;
                buf = (void *)((caddr_t)buf + len);
                if (err < B_OK)
                        goto out;
        }

        xfer->fc = d->fc;
        xfer->sc = NULL;
        xfer->hand = gFirewire->fw_xferwake;
        xfer->send.spd = 2 /* XXX */;

        if ((err = gFirewire->fw_asyreq(xfer->fc, -1, xfer)))
                goto out;

        if ((err = gFirewire->fw_xferwait(xfer)))
                goto out;

        if (xfer->resp != 0) {
                err = xfer->resp;
                goto out;
        }

        if (xfer->flag & FWXF_RCVD) {
                FW_GLOCK(xfer->fc);
                STAILQ_INSERT_TAIL(&d->rq, xfer, link);
                FW_GUNLOCK(xfer->fc);
                return B_OK;
        }

out:
        gFirewire->fw_xfer_free(xfer);
        return (err);
}


static status_t
fw_write (void *cookie, off_t position, const void *buf, size_t *num_bytes)
{
        int err = 0;
        int slept = 0;
        struct fw_drv1 *d;
        struct fw_pkt *fp;
        struct firewire_comm *fc;
        struct fw_xferq *it;
        cpu_status s;

        int len, pbytes = (int)*num_bytes;
        *num_bytes = 0;

        d = (struct fw_drv1 *)cookie;
        fc = d->fc;
        it = d->it;

        if (it == NULL)
                return (fw_write_async(d, position, buf, num_bytes));

        if (it->buf == NULL)
                return (EIO);

        FW_GLOCK(fc);
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;
#if 0   /* XXX to avoid lock recursion */
                        err = fc->itx_enable(fc, it->dmach);
                        if (err)
                                goto out;
#endif
//                      err = msleep(it, FW_GMTX(fc), FWPRI, "fw_write", hz);
                        FW_GUNLOCK(fc);
                        err = acquire_sem_etc(it->Sem, 1, B_CAN_INTERRUPT | B_TIMEOUT, 1000000);
                        FW_GLOCK(fc);

//                      if (err)
                        if (err < B_OK)
                                goto out;
                        goto isoloop;
                } else {
                        err = EIO;
                        goto out;
                }
        }
        FW_GUNLOCK(fc);
        fp = (struct fw_pkt *)fwdma_v_addr(it->buf,
                        it->stproc->poffset + it->queued);
//      err = uiomove((caddr_t)fp, sizeof(struct fw_isohdr), uio);
        len = sizeof(struct fw_isohdr);
        len = MIN(len, pbytes);
        err = user_memcpy(fp, buf, len);
        pbytes -= len;
        *num_bytes += len;
        buf = (void *)((caddr_t)buf + len);

//      err = uiomove((caddr_t)fp->mode.stream.payload,
//                              fp->mode.stream.len, uio);
        len = fp->mode.stream.len;
        len = MIN(len, pbytes);
        err = user_memcpy(fp->mode.stream.payload, buf, len);
        pbytes -= len;
        *num_bytes += len;
        buf = (void *)((caddr_t)buf + len);

        it->queued ++;
        if (it->queued >= it->bnpacket) {
                s = splfw();
                STAILQ_INSERT_TAIL(&it->stvalid, it->stproc, link);
                splx(s);
                it->stproc = NULL;
                err = fc->itx_enable(fc, it->dmach);
        }
//      if (uio->uio_resid >= sizeof(struct fw_isohdr)) {
        if (pbytes >= sizeof(struct fw_isohdr)) {
                slept = 0;
                FW_GLOCK(fc);
                goto isoloop;
        }
        return err;

out:
        FW_GUNLOCK(fc);
        return err;
}


static void
fw_hand(struct fw_xfer *xfer)
{
        struct fw_bind *fwb;
        struct fw_drv1 *d;

        fwb = (struct fw_bind *)xfer->sc;
        d = (struct fw_drv1 *)fwb->sc;
        FW_GLOCK(xfer->fc);
        STAILQ_INSERT_TAIL(&d->rq, xfer, link);
        FW_GUNLOCK(xfer->fc);
//      wakeup(&d->rq);
        release_sem_etc(d->rqSem, 1, B_DO_NOT_RESCHEDULE);
}


/*
 * ioctl support.
 */
static status_t
fw_ioctl (void *cookie, uint32 cmd, void *data, size_t length)
{
        struct firewire_comm *fc;
        struct fw_drv1 *d;
        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_devinfo *devinfo;
        void *ptr;

        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;
        struct fw_crom_buf *crom_buf = (struct fw_crom_buf *)data;

        if (!data)
                return(EINVAL);

        d = (struct fw_drv1 *)cookie;
        fc = d->fc;
        ir = d->ir;
        it = d->it;

        switch (cmd) {
        case FW_STSTREAM:
                if (it == NULL) {
                        i = gFirewire->fw_open_isodma(fc, /* tx */1);
                        if (i < 0) {
                                err = EBUSY;
                                break;
                        }
                        it = fc->it[i];
                        err = fwdev_allocbuf(it, &d->bufreq.tx);
                        if (err) {
                                it->flag &= ~FWXFERQ_OPEN;
                                break;
                        }
                }
                it->flag &= ~0xff;
                it->flag |= (0x3f & ichreq->ch);
                it->flag |= ((0x3 & ichreq->tag) << 6);
                d->it = it;
                break;
        case FW_GTSTREAM:
                if (it != NULL) {
                        ichreq->ch = it->flag & 0x3f;
                        ichreq->tag = it->flag >> 2 & 0x3;
                } else
                        err = EINVAL;
                break;
        case FW_SRSTREAM:
                if (ir == NULL) {
                        i = gFirewire->fw_open_isodma(fc, /* tx */0);
                        if (i < 0) {
                                err = EBUSY;
                                break;
                        }
                        ir = fc->ir[i];
                        err = fwdev_allocbuf(ir, &d->bufreq.rx);
                        if (err) {
                                ir->flag &= ~FWXFERQ_OPEN;
                                break;
                        }
                }
                ir->flag &= ~0xff;
                ir->flag |= (0x3f & ichreq->ch);
                ir->flag |= ((0x3 & ichreq->tag) << 6);
                d->ir = ir;
                err = fc->irx_enable(fc, ir->dmach);
                break;
        case FW_GRSTREAM:
                if (d->ir != NULL) {
                        ichreq->ch = ir->flag & 0x3f;
                        ichreq->tag = ir->flag >> 2 & 0x3;
                } else
                        err = EINVAL;
                break;
        case FW_SSTBUF:
                bcopy(ibufreq, &d->bufreq, sizeof(d->bufreq));
                break;
        case FW_GSTBUF:
                bzero(&ibufreq->rx, sizeof(ibufreq->rx));
                if (ir != NULL) {
                        ibufreq->rx.nchunk = ir->bnchunk;
                        ibufreq->rx.npacket = ir->bnpacket;
                        ibufreq->rx.psize = ir->psize;
                }
                bzero(&ibufreq->tx, sizeof(ibufreq->tx));
                if (it != NULL) {
                        ibufreq->tx.nchunk = it->bnchunk;
                        ibufreq->tx.npacket = it->bnpacket;
                        ibufreq->tx.psize = it->psize;
                }
                break;
        case FW_ASYREQ:
        {
                struct tcode_info *tinfo;
                int pay_len = 0;

                fp = &asyreq->pkt;
                tinfo = &fc->tcode[fp->mode.hdr.tcode];

                if ((tinfo->flag & FWTI_BLOCK_ASY) != 0)
                        pay_len = MAX(0, asyreq->req.len - tinfo->hdr_len);

                xfer = gFirewire->fw_xfer_alloc_buf(pay_len, B_PAGE_SIZE/*XXX*/);
                if (xfer == NULL)
                        return (ENOMEM);

                switch (asyreq->req.type) {
                case FWASREQNODE:
                        break;
                case FWASREQEUI:
                        fwdev = gFirewire->fw_noderesolve_eui64(fc,
                                                &asyreq->req.dst.eui);
                        if (fwdev == NULL) {
                                dprintf("FWASREQEUI cannot find node\n");
                                err = EINVAL;
                                goto out;
                        }
                        fp->mode.hdr.dst = FWLOCALBUS | fwdev->dst;
                        break;
                case FWASRESTL:
                        /* XXX what's this? */
                        break;
                case FWASREQSTREAM:
                        /* nothing to do */
                        break;
                }

                bcopy(fp, (void *)&xfer->send.hdr, tinfo->hdr_len);
                if (pay_len > 0)
                        bcopy((char *)fp + tinfo->hdr_len,
                            (void *)xfer->send.payload, pay_len);
                xfer->send.spd = asyreq->req.sped;
                xfer->hand = gFirewire->fw_xferwake;

                if ((err = gFirewire->fw_asyreq(fc, -1, xfer)) != 0)
                        goto out;
                if ((err = gFirewire->fw_xferwait(xfer)) != 0)
                        goto out;
                if (xfer->resp != 0) {
                        err = EIO;
                        goto out;
                }
                if ((tinfo->flag & FWTI_TLABEL) == 0)
                        goto out;

                /* copy response */
                tinfo = &fc->tcode[xfer->recv.hdr.mode.hdr.tcode];
                if (xfer->recv.hdr.mode.hdr.tcode == FWTCODE_RRESB ||
                    xfer->recv.hdr.mode.hdr.tcode == FWTCODE_LRES) {
                        pay_len = xfer->recv.pay_len;
                        if (asyreq->req.len >= xfer->recv.pay_len + tinfo->hdr_len) {
                                asyreq->req.len = xfer->recv.pay_len +
                                        tinfo->hdr_len;
                        } else {
                                err = EINVAL;
                                pay_len = 0;
                        }
                } else {
                        pay_len = 0;
                }
                bcopy(&xfer->recv.hdr, fp, tinfo->hdr_len);
                bcopy(xfer->recv.payload, (char *)fp + tinfo->hdr_len, pay_len);
out:
                gFirewire->fw_xfer_free_buf(xfer);
                break;
        }
        case FW_IBUSRST:
                fc->ibr(fc);
                break;
        case FW_CBINDADDR:
                fwb = gFirewire->fw_bindlookup(fc,
                                bindreq->start.hi, bindreq->start.lo);
                if (fwb == NULL) {
                        err = EINVAL;
                        break;
                }
                gFirewire->fw_bindremove(fc, fwb);
                STAILQ_REMOVE(&d->binds, fwb, fw_bind, chlist);
                gFirewire->fw_xferlist_remove(&fwb->xferlist);
                free(fwb);
                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));
                if (fwb == NULL) {
                        err = ENOMEM;
                        break;
                }
                fwb->start = ((u_int64_t)bindreq->start.hi << 32) |
                    bindreq->start.lo;
                fwb->end = fwb->start + bindreq->len;
                fwb->sc = (void *)d;
                STAILQ_INIT(&fwb->xferlist);
                err = gFirewire->fw_bindadd(fc, fwb);
                if (err == 0) {
                        gFirewire->fw_xferlist_add(&fwb->xferlist,
                            /* XXX */
                            B_PAGE_SIZE, B_PAGE_SIZE, 5,
                            fc, (void *)fwb, fw_hand);
                        STAILQ_INSERT_TAIL(&d->binds, fwb, chlist);
                }
                break;
        case FW_GDEVLST:
                i = len = 1;
                /* myself */
                devinfo = &fwdevlst->dev[0];
                devinfo->dst = fc->nodeid;
                devinfo->status = 0;    /* XXX */
                devinfo->eui.hi = fc->eui.hi;
                devinfo->eui.lo = fc->eui.lo;
                STAILQ_FOREACH(fwdev, &fc->devices, link) {
                        if (len < FW_MAX_DEVLST) {
                                devinfo = &fwdevlst->dev[len++];
                                devinfo->dst = fwdev->dst;
                                devinfo->status = 
                                        (fwdev->status == FWDEVINVAL) ? 0 : 1;
                                devinfo->eui.hi = fwdev->eui.hi;
                                devinfo->eui.lo = fwdev->eui.lo;
                        }
                        i++;
                }
                fwdevlst->n = i;
                fwdevlst->info_len = len;
                break;
        case FW_GTPMAP:
                bcopy(fc->topology_map, data,
                                (fc->topology_map->crc_len + 1) * 4);
                break;
        case FW_GCROM:
                STAILQ_FOREACH(fwdev, &fc->devices, link)
                        if (FW_EUI64_EQUAL(fwdev->eui, crom_buf->eui))
                                break;
                if (fwdev == NULL) {
                        if (!FW_EUI64_EQUAL(fc->eui, crom_buf->eui)) {
                                err = FWNODE_INVAL;
                                break;
                        }
                        /* myself */
                        ptr = malloc(CROMSIZE);
                        len = CROMSIZE;
                        for (i = 0; i < CROMSIZE / 4; i++)
                                ((uint32_t *)ptr)[i]
                                        = B_BENDIAN_TO_HOST_INT32(fc->config_rom[i]);
                } else {
                        /* found */
                        ptr = (void *)&fwdev->csrrom[0];
                        if (fwdev->rommax < CSRROMOFF)
                                len = 0;
                        else
                                len = fwdev->rommax - CSRROMOFF + 4;
                }
                if (crom_buf->len < len)
                        len = crom_buf->len;
                else
                        crom_buf->len = len;
//              err = copyout(ptr, crom_buf->ptr, len);//to be completed
                err = user_memcpy(crom_buf->ptr, ptr, len);
                if (fwdev == NULL)
                        /* myself */
                        free(ptr);
                break;
        default:
                fc->ioctl (fc, cmd, data, length);
                break;
        }
        return err;
}


status_t
init_hardware()
{
        return B_OK;
}


const char **
publish_devices(void)
{
        return (const char **)devices;
}


static device_hooks hooks = {
        &fw_open,
        &fw_close,
        &fw_free,
        &fw_ioctl,
        &fw_read,
        &fw_write,
        NULL,
        NULL,
        NULL,
        NULL
};

device_hooks *
find_device(const char *name)
{
        return &hooks;
}


status_t
init_driver()
{
        status_t err;
        struct firewire_softc *sc = NULL;
        uint32 i;
        
#if DEBUG && !defined(__HAIKU__)
        load_driver_symbols("fw_raw");
#endif

        if ((err = get_module(FIREWIRE_MODULE_NAME, (module_info **)&gFirewire)) != B_OK) {
                dprintf("fw_raw: couldn't load "FIREWIRE_MODULE_NAME"\n");
                return err;
        }

        devices_count = 0;
        while (gFirewire->get_handle(devices_count, &sc) == B_OK) {
                devices_count++;
        }

        if (devices_count <= 0) {
                put_module(FIREWIRE_MODULE_NAME);
                return ENODEV;
        }
        
        devices = malloc(sizeof(char *) * (devices_count + 1));
        if (!devices) {
                put_module(FIREWIRE_MODULE_NAME);
                return ENOMEM;
        }
        for (i = 0; i < devices_count; i++) {
                devices[i] = strdup(fwname);
                snprintf(devices[i], FWNAMEMAX, fwname, i);
        }
        devices[devices_count] = NULL;
        
        TRACE("fw_raw init_driver returns OK\n");
        return B_OK;
}


void
uninit_driver()
{
        int32 i = 0;
        for (i = 0; i < devices_count; i++) {
                free(devices[i]);
        }
        free(devices);
        devices = NULL;

        put_module(FIREWIRE_MODULE_NAME);
}