FreeBSD-5.3/sys/i4b/driver/i4b_rbch.c
/*
* Copyright (c) 1997, 2002 Hellmuth Michaelis. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*---------------------------------------------------------------------------
*
* i4b_rbch.c - device driver for raw B channel data
* ---------------------------------------------------
* last edit-date: [Sun Mar 17 09:51:03 2002]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i4b/driver/i4b_rbch.c,v 1.33 2004/06/16 09:47:10 phk Exp $");
#include "i4brbch.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/filio.h>
#include <sys/tty.h>
#include <net/if.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_rbch_ioctl.h>
#include <machine/i4b_debug.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/layer4/i4b_l4.h>
#include <sys/ioccom.h>
#include <sys/poll.h>
static drvr_link_t rbch_drvr_linktab[NI4BRBCH];
static isdn_link_t *isdn_linktab[NI4BRBCH];
#define I4BRBCHACCT 1 /* enable accounting messages */
#define I4BRBCHACCTINTVL 2 /* accounting msg interval in secs */
static struct rbch_softc {
int sc_unit; /* unit number */
int sc_devstate; /* state of driver */
#define ST_IDLE 0x00
#define ST_CONNECTED 0x01
#define ST_ISOPEN 0x02
#define ST_RDWAITDATA 0x04
#define ST_WRWAITEMPTY 0x08
#define ST_NOBLOCK 0x10
int sc_bprot; /* B-ch protocol used */
call_desc_t *sc_cd; /* Call Descriptor */
struct termios it_in;
struct ifqueue sc_hdlcq; /* hdlc read queue */
#define I4BRBCHMAXQLEN 10
struct selinfo selp; /* select / poll */
#if I4BRBCHACCT
struct callout_handle sc_callout;
int sc_iinb; /* isdn driver # of inbytes */
int sc_ioutb; /* isdn driver # of outbytes */
int sc_linb; /* last # of bytes rx'd */
int sc_loutb; /* last # of bytes tx'd */
int sc_fn; /* flag, first null acct */
#endif
} rbch_softc[NI4BRBCH];
static void rbch_rx_data_rdy(int unit);
static void rbch_tx_queue_empty(int unit);
static void rbch_connect(int unit, void *cdp);
static void rbch_disconnect(int unit, void *cdp);
static void rbch_init_linktab(int unit);
static void rbch_clrq(int unit);
static d_open_t i4brbchopen;
static d_close_t i4brbchclose;
static d_read_t i4brbchread;
static d_read_t i4brbchwrite;
static d_ioctl_t i4brbchioctl;
static d_poll_t i4brbchpoll;
static struct cdevsw i4brbch_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = i4brbchopen,
.d_close = i4brbchclose,
.d_read = i4brbchread,
.d_write = i4brbchwrite,
.d_ioctl = i4brbchioctl,
.d_poll = i4brbchpoll,
.d_name = "i4brbch",
};
static void i4brbchattach(void *);
PSEUDO_SET(i4brbchattach, i4b_rbch);
/*===========================================================================*
* DEVICE DRIVER ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
static void
i4brbchattach(void *dummy)
{
int i;
printf("i4brbch: %d raw B channel access device(s) attached\n", NI4BRBCH);
for(i=0; i < NI4BRBCH; i++)
{
make_dev(&i4brbch_cdevsw, i,
UID_ROOT, GID_WHEEL, 0600, "i4brbch%d", i);
#if I4BRBCHACCT
callout_handle_init(&rbch_softc[i].sc_callout);
rbch_softc[i].sc_fn = 1;
#endif
rbch_softc[i].sc_unit = i;
rbch_softc[i].sc_devstate = ST_IDLE;
rbch_softc[i].sc_hdlcq.ifq_maxlen = I4BRBCHMAXQLEN;
if(!mtx_initialized(&rbch_softc[i].sc_hdlcq.ifq_mtx))
mtx_init(&rbch_softc[i].sc_hdlcq.ifq_mtx, "i4b_rbch", NULL, MTX_DEF);
rbch_softc[i].it_in.c_ispeed = rbch_softc[i].it_in.c_ospeed = 64000;
termioschars(&rbch_softc[i].it_in);
rbch_init_linktab(i);
}
}
/*---------------------------------------------------------------------------*
* open rbch device
*---------------------------------------------------------------------------*/
static int
i4brbchopen(struct cdev *dev, int flag, int fmt, struct thread *td)
{
int unit = minor(dev);
if(unit >= NI4BRBCH)
return(ENXIO);
if(rbch_softc[unit].sc_devstate & ST_ISOPEN)
return(EBUSY);
#if 0
rbch_clrq(unit);
#endif
rbch_softc[unit].sc_devstate |= ST_ISOPEN;
NDBGL4(L4_RBCHDBG, "unit %d, open", unit);
return(0);
}
/*---------------------------------------------------------------------------*
* close rbch device
*---------------------------------------------------------------------------*/
static int
i4brbchclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
if(sc->sc_devstate & ST_CONNECTED)
i4b_l4_drvrdisc(BDRV_RBCH, unit);
sc->sc_devstate &= ~ST_ISOPEN;
rbch_clrq(unit);
NDBGL4(L4_RBCHDBG, "unit %d, closed", unit);
return(0);
}
/*---------------------------------------------------------------------------*
* read from rbch device
*---------------------------------------------------------------------------*/
static int
i4brbchread(struct cdev *dev, struct uio *uio, int ioflag)
{
struct mbuf *m;
int error = 0;
int unit = minor(dev);
struct ifqueue *iqp;
struct rbch_softc *sc = &rbch_softc[unit];
CRIT_VAR;
NDBGL4(L4_RBCHDBG, "unit %d, enter read", unit);
CRIT_BEG;
if(!(sc->sc_devstate & ST_ISOPEN))
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, read while not open", unit);
return(EIO);
}
if((sc->sc_devstate & ST_NOBLOCK))
{
if(!(sc->sc_devstate & ST_CONNECTED)) {
CRIT_END;
return(EWOULDBLOCK);
}
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = isdn_linktab[unit]->rx_queue;
if(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN)) {
CRIT_END;
return(EWOULDBLOCK);
}
}
else
{
while(!(sc->sc_devstate & ST_CONNECTED))
{
NDBGL4(L4_RBCHDBG, "unit %d, wait read init", unit);
if((error = tsleep( &rbch_softc[unit],
I4BPRI | PCATCH,
"rrrbch", 0 )) != 0)
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep", unit, error);
return(error);
}
}
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = isdn_linktab[unit]->rx_queue;
while(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN))
{
sc->sc_devstate |= ST_RDWAITDATA;
NDBGL4(L4_RBCHDBG, "unit %d, wait read data", unit);
if((error = tsleep( &isdn_linktab[unit]->rx_queue,
I4BPRI | PCATCH,
"rrbch", 0 )) != 0)
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep read", unit, error);
sc->sc_devstate &= ~ST_RDWAITDATA;
return(error);
}
}
}
IF_DEQUEUE(iqp, m);
NDBGL4(L4_RBCHDBG, "unit %d, read %d bytes", unit, m->m_len);
if(m && m->m_len)
{
error = uiomove(m->m_data, m->m_len, uio);
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, error %d uiomove", unit, error);
error = EIO;
}
if(m)
i4b_Bfreembuf(m);
CRIT_END;
return(error);
}
/*---------------------------------------------------------------------------*
* write to rbch device
*---------------------------------------------------------------------------*/
static int
i4brbchwrite(struct cdev *dev, struct uio * uio, int ioflag)
{
struct mbuf *m;
int error = 0;
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
CRIT_VAR;
NDBGL4(L4_RBCHDBG, "unit %d, write", unit);
CRIT_BEG;
if(!(sc->sc_devstate & ST_ISOPEN))
{
NDBGL4(L4_RBCHDBG, "unit %d, write while not open", unit);
CRIT_END;
return(EIO);
}
if((sc->sc_devstate & ST_NOBLOCK))
{
if(!(sc->sc_devstate & ST_CONNECTED)) {
CRIT_END;
return(EWOULDBLOCK);
}
if(_IF_QFULL(isdn_linktab[unit]->tx_queue) && (sc->sc_devstate & ST_ISOPEN)) {
CRIT_END;
return(EWOULDBLOCK);
}
}
else
{
while(!(sc->sc_devstate & ST_CONNECTED))
{
NDBGL4(L4_RBCHDBG, "unit %d, write wait init", unit);
error = tsleep( &rbch_softc[unit],
I4BPRI | PCATCH,
"wrrbch", 0 );
if(error == ERESTART) {
CRIT_END;
return (ERESTART);
}
else if(error == EINTR)
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait init", unit);
return(EINTR);
}
else if(error)
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep init", unit, error);
return(error);
}
tsleep( &rbch_softc[unit], I4BPRI | PCATCH, "xrbch", (hz*1));
}
while(_IF_QFULL(isdn_linktab[unit]->tx_queue) && (sc->sc_devstate & ST_ISOPEN))
{
sc->sc_devstate |= ST_WRWAITEMPTY;
NDBGL4(L4_RBCHDBG, "unit %d, write queue full", unit);
if ((error = tsleep( &isdn_linktab[unit]->tx_queue,
I4BPRI | PCATCH,
"wrbch", 0)) != 0) {
sc->sc_devstate &= ~ST_WRWAITEMPTY;
if(error == ERESTART)
{
CRIT_END;
return(ERESTART);
}
else if(error == EINTR)
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait write", unit);
return(error);
}
else if(error)
{
CRIT_END;
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep write", unit, error);
return(error);
}
}
}
}
if(!(sc->sc_devstate & ST_ISOPEN))
{
NDBGL4(L4_RBCHDBG, "unit %d, not open anymore", unit);
CRIT_END;
return(EIO);
}
if((m = i4b_Bgetmbuf(BCH_MAX_DATALEN)) != NULL)
{
m->m_len = min(BCH_MAX_DATALEN, uio->uio_resid);
NDBGL4(L4_RBCHDBG, "unit %d, write %d bytes", unit, m->m_len);
error = uiomove(m->m_data, m->m_len, uio);
(void) IF_HANDOFF(isdn_linktab[unit]->tx_queue, m, NULL);
(*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
}
CRIT_END;
return(error);
}
/*---------------------------------------------------------------------------*
* rbch device ioctl handlibg
*---------------------------------------------------------------------------*/
static int
i4brbchioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
int error = 0;
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
switch(cmd)
{
case FIOASYNC: /* Set async mode */
if (*(int *)data)
{
NDBGL4(L4_RBCHDBG, "unit %d, setting async mode", unit);
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, clearing async mode", unit);
}
break;
case FIONBIO:
if (*(int *)data)
{
NDBGL4(L4_RBCHDBG, "unit %d, setting non-blocking mode", unit);
sc->sc_devstate |= ST_NOBLOCK;
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, clearing non-blocking mode", unit);
sc->sc_devstate &= ~ST_NOBLOCK;
}
break;
case TIOCCDTR: /* Clear DTR */
if(sc->sc_devstate & ST_CONNECTED)
{
NDBGL4(L4_RBCHDBG, "unit %d, disconnecting for DTR down", unit);
i4b_l4_drvrdisc(BDRV_RBCH, unit);
}
break;
case I4B_RBCH_DIALOUT:
{
size_t l;
for (l = 0; l < TELNO_MAX && ((char *)data)[l]; l++)
;
if (l)
{
NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout to %s", unit, (char *)data);
i4b_l4_dialoutnumber(BDRV_RBCH, unit, l, (char *)data);
break;
}
/* FALLTHROUGH to SDTR */
}
case TIOCSDTR: /* Set DTR */
NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout (DTR)", unit);
i4b_l4_dialout(BDRV_RBCH, unit);
break;
case TIOCSETA: /* Set termios struct */
break;
case TIOCGETA: /* Get termios struct */
*(struct termios *)data = sc->it_in;
break;
case TIOCMGET:
*(int *)data = TIOCM_LE|TIOCM_DTR|TIOCM_RTS|TIOCM_CTS|TIOCM_DSR;
if (sc->sc_devstate & ST_CONNECTED)
*(int *)data |= TIOCM_CD;
break;
case I4B_RBCH_VR_REQ:
{
msg_vr_req_t *mvr;
mvr = (msg_vr_req_t *)data;
mvr->version = VERSION;
mvr->release = REL;
mvr->step = STEP;
break;
}
default: /* Unknown stuff */
NDBGL4(L4_RBCHDBG, "unit %d, ioctl, unknown cmd %lx", unit, (u_long)cmd);
error = EINVAL;
break;
}
return(error);
}
/*---------------------------------------------------------------------------*
* device driver poll
*---------------------------------------------------------------------------*/
static int
i4brbchpoll(struct cdev *dev, int events, struct thread *td)
{
int revents = 0; /* Events we found */
int s;
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
/* We can't check for anything but IN or OUT */
s = splhigh();
if(!(sc->sc_devstate & ST_ISOPEN))
{
splx(s);
return(POLLNVAL);
}
/*
* Writes are OK if we are connected and the
* transmit queue can take them
*/
if((events & (POLLOUT|POLLWRNORM)) &&
(sc->sc_devstate & ST_CONNECTED) &&
!_IF_QFULL(isdn_linktab[unit]->tx_queue))
{
revents |= (events & (POLLOUT|POLLWRNORM));
}
/* ... while reads are OK if we have any data */
if((events & (POLLIN|POLLRDNORM)) &&
(sc->sc_devstate & ST_CONNECTED))
{
struct ifqueue *iqp;
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = isdn_linktab[unit]->rx_queue;
if(!IF_QEMPTY(iqp))
revents |= (events & (POLLIN|POLLRDNORM));
}
if(revents == 0)
selrecord(td, &sc->selp);
splx(s);
return(revents);
}
#if I4BRBCHACCT
/*---------------------------------------------------------------------------*
* watchdog routine
*---------------------------------------------------------------------------*/
static void
rbch_timeout(struct rbch_softc *sc)
{
bchan_statistics_t bs;
int unit = sc->sc_unit;
/* get # of bytes in and out from the HSCX driver */
(*isdn_linktab[unit]->bch_stat)
(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
sc->sc_ioutb += bs.outbytes;
sc->sc_iinb += bs.inbytes;
if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
{
int ri = (sc->sc_iinb - sc->sc_linb)/I4BRBCHACCTINTVL;
int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BRBCHACCTINTVL;
if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
sc->sc_fn = 0;
else
sc->sc_fn = 1;
sc->sc_linb = sc->sc_iinb;
sc->sc_loutb = sc->sc_ioutb;
i4b_l4_accounting(BDRV_RBCH, unit, ACCT_DURING,
sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_ioutb, sc->sc_iinb);
}
START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz);
}
#endif /* I4BRBCHACCT */
/*===========================================================================*
* ISDN INTERFACE ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at connect time
*---------------------------------------------------------------------------*/
static void
rbch_connect(int unit, void *cdp)
{
call_desc_t *cd = (call_desc_t *)cdp;
struct rbch_softc *sc = &rbch_softc[unit];
sc->sc_bprot = cd->bprot;
#if I4BRBCHACCT
if(sc->sc_bprot == BPROT_RHDLC)
{
sc->sc_iinb = 0;
sc->sc_ioutb = 0;
sc->sc_linb = 0;
sc->sc_loutb = 0;
START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz);
}
#endif
if(!(sc->sc_devstate & ST_CONNECTED))
{
NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit);
sc->sc_devstate |= ST_CONNECTED;
sc->sc_cd = cdp;
wakeup(sc);
}
}
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at disconnect time
*---------------------------------------------------------------------------*/
static void
rbch_disconnect(int unit, void *cdp)
{
call_desc_t *cd = (call_desc_t *)cdp;
struct rbch_softc *sc = &rbch_softc[unit];
CRIT_VAR;
if(cd != sc->sc_cd)
{
NDBGL4(L4_RBCHDBG, "rbch%d: channel %d not active",
cd->driver_unit, cd->channelid);
return;
}
CRIT_BEG;
NDBGL4(L4_RBCHDBG, "unit %d, disconnect", unit);
sc->sc_devstate &= ~ST_CONNECTED;
sc->sc_cd = NULL;
#if I4BRBCHACCT
i4b_l4_accounting(BDRV_RBCH, unit, ACCT_FINAL,
sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_ioutb, sc->sc_iinb);
STOP_TIMER(sc->sc_callout, rbch_timeout, sc);
#endif
CRIT_END;
}
/*---------------------------------------------------------------------------*
* feedback from daemon in case of dial problems
*---------------------------------------------------------------------------*/
static void
rbch_dialresponse(int unit, int status, cause_t cause)
{
}
/*---------------------------------------------------------------------------*
* interface up/down
*---------------------------------------------------------------------------*/
static void
rbch_updown(int unit, int updown)
{
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when a new frame (mbuf) has been received and is to be put on
* the rx queue.
*---------------------------------------------------------------------------*/
static void
rbch_rx_data_rdy(int unit)
{
if(rbch_softc[unit].sc_bprot == BPROT_RHDLC)
{
register struct mbuf *m;
if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
return;
m->m_pkthdr.len = m->m_len;
if (! IF_HANDOFF(&(rbch_softc[unit].sc_hdlcq), m, NULL))
{
NDBGL4(L4_RBCHDBG, "unit %d: hdlc rx queue full!", unit);
}
}
if(rbch_softc[unit].sc_devstate & ST_RDWAITDATA)
{
NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit);
rbch_softc[unit].sc_devstate &= ~ST_RDWAITDATA;
wakeup( &isdn_linktab[unit]->rx_queue);
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, NO wakeup", unit);
}
selwakeuppri(&rbch_softc[unit].selp, I4BPRI);
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when the last frame has been sent out and there is no
* further frame (mbuf) in the tx queue.
*---------------------------------------------------------------------------*/
static void
rbch_tx_queue_empty(int unit)
{
if(rbch_softc[unit].sc_devstate & ST_WRWAITEMPTY)
{
NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit);
rbch_softc[unit].sc_devstate &= ~ST_WRWAITEMPTY;
wakeup( &isdn_linktab[unit]->tx_queue);
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, NO wakeup", unit);
}
selwakeuppri(&rbch_softc[unit].selp, TTOPRI);
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* each time a packet is received or transmitted
*---------------------------------------------------------------------------*/
static void
rbch_activity(int unit, int rxtx)
{
if (rbch_softc[unit].sc_cd)
rbch_softc[unit].sc_cd->last_active_time = SECOND;
selwakeuppri(&rbch_softc[unit].selp, I4BPRI);
}
/*---------------------------------------------------------------------------*
* clear an hdlc rx queue for a rbch unit
*---------------------------------------------------------------------------*/
static void
rbch_clrq(int unit)
{
CRIT_VAR;
CRIT_BEG;
IF_DRAIN(&rbch_softc[unit].sc_hdlcq);
CRIT_END;
}
/*---------------------------------------------------------------------------*
* return this drivers linktab address
*---------------------------------------------------------------------------*/
drvr_link_t *
rbch_ret_linktab(int unit)
{
rbch_init_linktab(unit);
return(&rbch_drvr_linktab[unit]);
}
/*---------------------------------------------------------------------------*
* setup the isdn_linktab for this driver
*---------------------------------------------------------------------------*/
void
rbch_set_linktab(int unit, isdn_link_t *ilt)
{
isdn_linktab[unit] = ilt;
}
/*---------------------------------------------------------------------------*
* initialize this drivers linktab
*---------------------------------------------------------------------------*/
static void
rbch_init_linktab(int unit)
{
rbch_drvr_linktab[unit].unit = unit;
rbch_drvr_linktab[unit].bch_rx_data_ready = rbch_rx_data_rdy;
rbch_drvr_linktab[unit].bch_tx_queue_empty = rbch_tx_queue_empty;
rbch_drvr_linktab[unit].bch_activity = rbch_activity;
rbch_drvr_linktab[unit].line_connected = rbch_connect;
rbch_drvr_linktab[unit].line_disconnected = rbch_disconnect;
rbch_drvr_linktab[unit].dial_response = rbch_dialresponse;
rbch_drvr_linktab[unit].updown_ind = rbch_updown;
}
/*===========================================================================*/