682 lines
17 KiB
C
682 lines
17 KiB
C
/*
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* Copyright (c) 1997, 1999 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4b_isac.c - i4b siemens isdn chipset driver ISAC handler
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* ---------------------------------------------------------
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*
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* $Id: i4b_isac.c,v 1.30 1999/02/14 19:51:01 hm Exp $
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*
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* last edit-date: [Sun Feb 14 10:27:09 1999]
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*
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*---------------------------------------------------------------------------*/
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#ifdef __FreeBSD__
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#include "isic.h"
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#else
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#define NISIC 1 /* non-FreeBSD handles this via config(8) */
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#endif
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#if NISIC > 0
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#ifdef __FreeBSD__
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#include "opt_i4b.h"
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#endif
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#include <sys/param.h>
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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#include <sys/ioccom.h>
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#else
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#include <sys/ioctl.h>
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#endif
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <machine/stdarg.h>
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#ifdef __FreeBSD__
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#include <machine/clock.h>
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#include <i386/isa/isa_device.h>
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#else
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#ifndef __bsdi__
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#include <machine/bus.h>
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#endif
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#include <sys/device.h>
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#endif
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#include <sys/socket.h>
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#include <net/if.h>
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#ifdef __FreeBSD__
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#include <machine/i4b_debug.h>
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#include <machine/i4b_ioctl.h>
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#include <machine/i4b_trace.h>
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#else
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#include <i4b/i4b_debug.h>
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#include <i4b/i4b_ioctl.h>
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#include <i4b/i4b_trace.h>
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#endif
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#include <i4b/layer1/i4b_l1.h>
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#include <i4b/layer1/i4b_isac.h>
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#include <i4b/layer1/i4b_hscx.h>
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#include <i4b/include/i4b_global.h>
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#include <i4b/include/i4b_l1l2.h>
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#include <i4b/include/i4b_mbuf.h>
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static u_char isic_isac_exir_hdlr(register struct isic_softc *sc, u_char exir);
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static void isic_isac_ind_hdlr(register struct isic_softc *sc, int ind);
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/*---------------------------------------------------------------------------*
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* ISAC interrupt service routine
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*---------------------------------------------------------------------------*/
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void
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isic_isac_irq(struct isic_softc *sc, int ista)
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{
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register u_char c = 0;
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DBGL1(L1_F_MSG, "isic_isac_irq", ("unit %d: ista = 0x%02x\n", sc->sc_unit, ista));
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if(ista & ISAC_ISTA_EXI) /* extended interrupt */
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{
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c |= isic_isac_exir_hdlr(sc, ISAC_READ(I_EXIR));
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}
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if(ista & ISAC_ISTA_RME) /* receive message end */
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{
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register int rest;
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u_char rsta;
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/* get rx status register */
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rsta = ISAC_READ(I_RSTA);
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if((rsta & ISAC_RSTA_MASK) != 0x20)
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{
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int error = 0;
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if(!(rsta & ISAC_RSTA_CRC)) /* CRC error */
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{
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error++;
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DBGL1(L1_I_ERR, "isic_isac_irq", ("unit %d: CRC error\n", sc->sc_unit));
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}
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if(rsta & ISAC_RSTA_RDO) /* ReceiveDataOverflow */
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{
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error++;
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DBGL1(L1_I_ERR, "isic_isac_irq", ("unit %d: Data Overrun error\n", sc->sc_unit));
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}
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if(rsta & ISAC_RSTA_RAB) /* ReceiveABorted */
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{
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error++;
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DBGL1(L1_I_ERR, "isic_isac_irq", ("unit %d: Receive Aborted error\n", sc->sc_unit));
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}
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if(error == 0)
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DBGL1(L1_I_ERR, "isic_isac_irq", ("unit %d: RME unknown error, RSTA = 0x%02x!\n", sc->sc_unit, rsta));
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i4b_Dfreembuf(sc->sc_ibuf);
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c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES;
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sc->sc_ibuf = NULL;
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sc->sc_ib = NULL;
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sc->sc_ilen = 0;
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ISAC_WRITE(I_CMDR, ISAC_CMDR_RMC|ISAC_CMDR_RRES);
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ISACCMDRWRDELAY();
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return;
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}
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rest = (ISAC_READ(I_RBCL) & (ISAC_FIFO_LEN-1));
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if(rest == 0)
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rest = ISAC_FIFO_LEN;
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if(sc->sc_ibuf == NULL)
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{
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if((sc->sc_ibuf = i4b_Dgetmbuf(rest)) != NULL)
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sc->sc_ib = sc->sc_ibuf->m_data;
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else
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panic("isic_isac_irq: RME, i4b_Dgetmbuf returns NULL!\n");
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sc->sc_ilen = 0;
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}
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if(sc->sc_ilen <= (MAX_DFRAME_LEN - rest))
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{
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ISAC_RDFIFO(sc->sc_ib, rest);
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sc->sc_ilen += rest;
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sc->sc_ibuf->m_pkthdr.len =
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sc->sc_ibuf->m_len = sc->sc_ilen;
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if(sc->sc_trace & TRACE_D_RX)
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{
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i4b_trace_hdr_t hdr;
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hdr.unit = sc->sc_unit;
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hdr.type = TRC_CH_D;
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hdr.dir = FROM_NT;
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hdr.count = ++sc->sc_trace_dcount;
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MICROTIME(hdr.time);
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MPH_Trace_Ind(&hdr, sc->sc_ibuf->m_len, sc->sc_ibuf->m_data);
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}
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c |= ISAC_CMDR_RMC;
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if(sc->sc_enabled)
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PH_Data_Ind(sc->sc_unit, sc->sc_ibuf);
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else
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i4b_Dfreembuf(sc->sc_ibuf);
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}
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else
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{
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DBGL1(L1_I_ERR, "isic_isac_irq", ("RME, input buffer overflow!\n"));
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i4b_Dfreembuf(sc->sc_ibuf);
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c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES;
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}
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sc->sc_ibuf = NULL;
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sc->sc_ib = NULL;
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sc->sc_ilen = 0;
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}
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if(ista & ISAC_ISTA_RPF) /* receive fifo full */
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{
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if(sc->sc_ibuf == NULL)
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{
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if((sc->sc_ibuf = i4b_Dgetmbuf(MAX_DFRAME_LEN)) != NULL)
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sc->sc_ib= sc->sc_ibuf->m_data;
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else
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panic("isic_isac_irq: RPF, i4b_Dgetmbuf returns NULL!\n");
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sc->sc_ilen = 0;
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}
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if(sc->sc_ilen <= (MAX_DFRAME_LEN - ISAC_FIFO_LEN))
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{
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ISAC_RDFIFO(sc->sc_ib, ISAC_FIFO_LEN);
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sc->sc_ilen += ISAC_FIFO_LEN;
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sc->sc_ib += ISAC_FIFO_LEN;
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c |= ISAC_CMDR_RMC;
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}
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else
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{
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DBGL1(L1_I_ERR, "isic_isac_irq", ("RPF, input buffer overflow!\n"));
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i4b_Dfreembuf(sc->sc_ibuf);
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sc->sc_ibuf = NULL;
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sc->sc_ib = NULL;
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sc->sc_ilen = 0;
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c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES;
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}
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}
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if(ista & ISAC_ISTA_XPR) /* transmit fifo empty (XPR bit set) */
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{
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if((sc->sc_obuf2 != NULL) && (sc->sc_obuf == NULL))
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{
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sc->sc_freeflag = sc->sc_freeflag2;
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sc->sc_obuf = sc->sc_obuf2;
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sc->sc_op = sc->sc_obuf->m_data;
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sc->sc_ol = sc->sc_obuf->m_len;
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sc->sc_obuf2 = NULL;
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#ifdef NOTDEF
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printf("ob2=%x, op=%x, ol=%d, f=%d #",
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sc->sc_obuf,
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sc->sc_op,
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sc->sc_ol,
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sc->sc_state);
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#endif
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}
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else
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{
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#ifdef NOTDEF
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printf("ob=%x, op=%x, ol=%d, f=%d #",
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sc->sc_obuf,
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sc->sc_op,
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sc->sc_ol,
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sc->sc_state);
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#endif
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}
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if(sc->sc_obuf)
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{
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ISAC_WRFIFO(sc->sc_op, min(sc->sc_ol, ISAC_FIFO_LEN));
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if(sc->sc_ol > ISAC_FIFO_LEN) /* length > 32 ? */
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{
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sc->sc_op += ISAC_FIFO_LEN; /* bufferptr+32 */
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sc->sc_ol -= ISAC_FIFO_LEN; /* length - 32 */
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c |= ISAC_CMDR_XTF; /* set XTF bit */
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}
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else
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{
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if(sc->sc_freeflag)
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{
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i4b_Dfreembuf(sc->sc_obuf);
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sc->sc_freeflag = 0;
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}
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sc->sc_obuf = NULL;
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sc->sc_op = NULL;
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sc->sc_ol = 0;
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c |= ISAC_CMDR_XTF | ISAC_CMDR_XME;
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}
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}
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else
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{
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sc->sc_state &= ~ISAC_TX_ACTIVE;
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}
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}
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if(ista & ISAC_ISTA_CISQ) /* channel status change CISQ */
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{
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register u_char ci;
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/* get command/indication rx register*/
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ci = ISAC_READ(I_CIRR);
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/* if S/Q IRQ, read SQC reg to clr SQC IRQ */
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if(ci & ISAC_CIRR_SQC)
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(void) ISAC_READ(I_SQRR);
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/* C/I code change IRQ (flag already cleared by CIRR read) */
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if(ci & ISAC_CIRR_CIC0)
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isic_isac_ind_hdlr(sc, (ci >> 2) & 0xf);
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}
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if(c)
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{
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ISAC_WRITE(I_CMDR, c);
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ISACCMDRWRDELAY();
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}
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}
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/*---------------------------------------------------------------------------*
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* ISAC L1 Extended IRQ handler
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*---------------------------------------------------------------------------*/
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static u_char
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isic_isac_exir_hdlr(register struct isic_softc *sc, u_char exir)
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{
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u_char c = 0;
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if(exir & ISAC_EXIR_XMR)
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{
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Tx Message Repeat\n"));
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c |= ISAC_CMDR_XRES;
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}
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if(exir & ISAC_EXIR_XDU)
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{
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Tx Data Underrun\n"));
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c |= ISAC_CMDR_XRES;
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}
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if(exir & ISAC_EXIR_PCE)
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{
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Protocol Error\n"));
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}
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if(exir & ISAC_EXIR_RFO)
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{
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Rx Frame Overflow\n"));
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c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES;
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}
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if(exir & ISAC_EXIR_SOV)
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{
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Sync Xfer Overflow\n"));
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}
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if(exir & ISAC_EXIR_MOS)
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{
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DBGL1(L1_I_ERR, "L1 isic_isac_exir_hdlr", ("EXIRQ Monitor Status\n"));
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}
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if(exir & ISAC_EXIR_SAW)
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{
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/* cannot happen, STCR:TSF is set to 0 */
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Subscriber Awake\n"));
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}
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if(exir & ISAC_EXIR_WOV)
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{
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/* cannot happen, STCR:TSF is set to 0 */
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DBGL1(L1_I_ERR, "isic_isac_exir_hdlr", ("EXIRQ Watchdog Timer Overflow\n"));
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}
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return(c);
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}
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/*---------------------------------------------------------------------------*
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* ISAC L1 Indication handler
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*---------------------------------------------------------------------------*/
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static void
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isic_isac_ind_hdlr(register struct isic_softc *sc, int ind)
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{
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register int event;
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switch(ind)
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{
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case ISAC_CIRR_IAI8:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx AI8 in state %s\n", isic_printstate(sc)));
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if(sc->sc_bustyp == BUS_TYPE_IOM2)
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isic_isac_l1_cmd(sc, CMD_AR8);
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event = EV_INFO48;
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MPH_Status_Ind(sc->sc_unit, STI_L1STAT, LAYER_ACTIVE);
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break;
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case ISAC_CIRR_IAI10:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx AI10 in state %s\n", isic_printstate(sc)));
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if(sc->sc_bustyp == BUS_TYPE_IOM2)
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isic_isac_l1_cmd(sc, CMD_AR10);
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event = EV_INFO410;
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MPH_Status_Ind(sc->sc_unit, STI_L1STAT, LAYER_ACTIVE);
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break;
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case ISAC_CIRR_IRSY:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx RSY in state %s\n", isic_printstate(sc)));
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event = EV_RSY;
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break;
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case ISAC_CIRR_IPU:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx PU in state %s\n", isic_printstate(sc)));
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event = EV_PU;
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break;
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case ISAC_CIRR_IDR:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx DR in state %s\n", isic_printstate(sc)));
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isic_isac_l1_cmd(sc, CMD_DIU);
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event = EV_DR;
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break;
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case ISAC_CIRR_IDID:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx DID in state %s\n", isic_printstate(sc)));
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event = EV_INFO0;
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MPH_Status_Ind(sc->sc_unit, STI_L1STAT, LAYER_IDLE);
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break;
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case ISAC_CIRR_IDIS:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx DIS in state %s\n", isic_printstate(sc)));
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event = EV_DIS;
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break;
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case ISAC_CIRR_IEI:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx EI in state %s\n", isic_printstate(sc)));
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isic_isac_l1_cmd(sc, CMD_DIU);
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event = EV_EI;
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break;
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case ISAC_CIRR_IARD:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx ARD in state %s\n", isic_printstate(sc)));
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event = EV_INFO2;
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break;
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case ISAC_CIRR_ITI:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx TI in state %s\n", isic_printstate(sc)));
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event = EV_INFO0;
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break;
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case ISAC_CIRR_IATI:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx ATI in state %s\n", isic_printstate(sc)));
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event = EV_INFO0;
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break;
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case ISAC_CIRR_ISD:
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DBGL1(L1_I_CICO, "isic_isac_ind_hdlr", ("rx SD in state %s\n", isic_printstate(sc)));
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event = EV_INFO0;
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break;
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default:
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DBGL1(L1_I_ERR, "isic_isac_ind_hdlr", ("UNKNOWN Indication 0x%x in state %s\n", ind, isic_printstate(sc)));
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event = EV_INFO0;
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break;
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}
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isic_next_state(sc, event);
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}
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/*---------------------------------------------------------------------------*
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* execute a layer 1 command
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*---------------------------------------------------------------------------*/
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void
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isic_isac_l1_cmd(struct isic_softc *sc, int command)
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{
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u_char cmd;
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#ifdef I4B_SMP_WORKAROUND
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/* XXXXXXXXXXXXXXXXXXX */
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/*
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* patch from Wolfgang Helbig:
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*
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* Here is a patch that makes i4b work on an SMP:
|
|
* The card (TELES 16.3) didn't interrupt on an SMP machine.
|
|
* This is a gross workaround, but anyway it works *and* provides
|
|
* some information as how to finally fix this problem.
|
|
*/
|
|
|
|
HSCX_WRITE(0, H_MASK, 0xff);
|
|
HSCX_WRITE(1, H_MASK, 0xff);
|
|
ISAC_WRITE(I_MASK, 0xff);
|
|
DELAY(100);
|
|
HSCX_WRITE(0, H_MASK, HSCX_A_IMASK);
|
|
HSCX_WRITE(1, H_MASK, HSCX_B_IMASK);
|
|
ISAC_WRITE(I_MASK, ISAC_IMASK);
|
|
|
|
/* XXXXXXXXXXXXXXXXXXX */
|
|
|
|
#endif /* I4B_SMP_WORKAROUND */
|
|
|
|
if(command < 0 || command > CMD_ILL)
|
|
{
|
|
DBGL1(L1_I_ERR, "isic_isac_l1_cmd", ("illegal cmd 0x%x in state %s\n", command, isic_printstate(sc)));
|
|
return;
|
|
}
|
|
|
|
if(sc->sc_bustyp == BUS_TYPE_IOM2)
|
|
cmd = ISAC_CIX0_LOW;
|
|
else
|
|
cmd = 0;
|
|
|
|
switch(command)
|
|
{
|
|
case CMD_TIM:
|
|
DBGL1(L1_I_CICO, "isic_isac_l1_cmd", ("tx TIM in state %s\n", isic_printstate(sc)));
|
|
cmd |= (ISAC_CIXR_CTIM << 2);
|
|
break;
|
|
|
|
case CMD_RS:
|
|
DBGL1(L1_I_CICO, "isic_isac_l1_cmd", ("tx RS in state %s\n", isic_printstate(sc)));
|
|
cmd |= (ISAC_CIXR_CRS << 2);
|
|
break;
|
|
|
|
case CMD_AR8:
|
|
DBGL1(L1_I_CICO, "isic_isac_l1_cmd", ("tx AR8 in state %s\n", isic_printstate(sc)));
|
|
cmd |= (ISAC_CIXR_CAR8 << 2);
|
|
break;
|
|
|
|
case CMD_AR10:
|
|
DBGL1(L1_I_CICO, "isic_isac_l1_cmd", ("tx AR10 in state %s\n", isic_printstate(sc)));
|
|
cmd |= (ISAC_CIXR_CAR10 << 2);
|
|
break;
|
|
|
|
case CMD_DIU:
|
|
DBGL1(L1_I_CICO, "isic_isac_l1_cmd", ("tx DIU in state %s\n", isic_printstate(sc)));
|
|
cmd |= (ISAC_CIXR_CDIU << 2);
|
|
break;
|
|
}
|
|
ISAC_WRITE(I_CIXR, cmd);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* L1 ISAC initialization
|
|
*---------------------------------------------------------------------------*/
|
|
int
|
|
isic_isac_init(struct isic_softc *sc)
|
|
{
|
|
ISAC_IMASK = 0xff; /* disable all irqs */
|
|
|
|
ISAC_WRITE(I_MASK, ISAC_IMASK);
|
|
|
|
if(sc->sc_bustyp != BUS_TYPE_IOM2)
|
|
{
|
|
DBGL1(L1_I_SETUP, "isic_isac_setup", ("configuring for IOM-1 mode\n"));
|
|
|
|
/* ADF2: Select mode IOM-1 */
|
|
ISAC_WRITE(I_ADF2, 0x00);
|
|
|
|
/* SPCR: serial port control register:
|
|
* SPU - software power up = 0
|
|
* SAC - SIP port high Z
|
|
* SPM - timing mode 0
|
|
* TLP - test loop = 0
|
|
* C1C, C2C - B1 and B2 switched to/from SPa
|
|
*/
|
|
ISAC_WRITE(I_SPCR, ISAC_SPCR_C1C1|ISAC_SPCR_C2C1);
|
|
|
|
/* SQXR: S/Q channel xmit register:
|
|
* SQIE - S/Q IRQ enable = 0
|
|
* SQX1-4 - Fa bits = 1
|
|
*/
|
|
ISAC_WRITE(I_SQXR, ISAC_SQXR_SQX1|ISAC_SQXR_SQX2|ISAC_SQXR_SQX3|ISAC_SQXR_SQX4);
|
|
|
|
/* ADF1: additional feature reg 1:
|
|
* WTC - watchdog = 0
|
|
* TEM - test mode = 0
|
|
* PFS - pre-filter = 0
|
|
* CFS - IOM clock/frame always active
|
|
* FSC1/2 - polarity of 8kHz strobe
|
|
* ITF - interframe fill = idle
|
|
*/
|
|
ISAC_WRITE(I_ADF1, ISAC_ADF1_FC2); /* ADF1 */
|
|
|
|
/* STCR: sync transfer control reg:
|
|
* TSF - terminal secific functions = 0
|
|
* TBA - TIC bus address = 7
|
|
* STx/SCx = 0
|
|
*/
|
|
ISAC_WRITE(I_STCR, ISAC_STCR_TBA2|ISAC_STCR_TBA1|ISAC_STCR_TBA0);
|
|
|
|
/* MODE: Mode Register:
|
|
* MDSx - transparent mode 2
|
|
* TMD - timer mode = external
|
|
* RAC - Receiver enabled
|
|
* DIMx - digital i/f mode
|
|
*/
|
|
ISAC_WRITE(I_MODE, ISAC_MODE_MDS2|ISAC_MODE_MDS1|ISAC_MODE_RAC|ISAC_MODE_DIM0);
|
|
}
|
|
else
|
|
{
|
|
DBGL1(L1_I_SETUP, "isic_isac_setup", ("configuring for IOM-2 mode\n"));
|
|
|
|
/* ADF2: Select mode IOM-2 */
|
|
ISAC_WRITE(I_ADF2, ISAC_ADF2_IMS);
|
|
|
|
/* SPCR: serial port control register:
|
|
* SPU - software power up = 0
|
|
* SPM - timing mode 0
|
|
* TLP - test loop = 0
|
|
* C1C, C2C - B1 + C1 and B2 + IC2 monitoring
|
|
*/
|
|
ISAC_WRITE(I_SPCR, 0x00);
|
|
|
|
/* SQXR: S/Q channel xmit register:
|
|
* IDC - IOM direction = 0 (master)
|
|
* CFS - Config Select = 0 (clock always active)
|
|
* CI1E - C/I channel 1 IRQ enable = 0
|
|
* SQIE - S/Q IRQ enable = 0
|
|
* SQX1-4 - Fa bits = 1
|
|
*/
|
|
ISAC_WRITE(I_SQXR, ISAC_SQXR_SQX1|ISAC_SQXR_SQX2|ISAC_SQXR_SQX3|ISAC_SQXR_SQX4);
|
|
|
|
/* ADF1: additional feature reg 1:
|
|
* WTC - watchdog = 0
|
|
* TEM - test mode = 0
|
|
* PFS - pre-filter = 0
|
|
* IOF - IOM i/f off = 0
|
|
* ITF - interframe fill = idle
|
|
*/
|
|
ISAC_WRITE(I_ADF1, 0x00);
|
|
|
|
/* STCR: sync transfer control reg:
|
|
* TSF - terminal secific functions = 0
|
|
* TBA - TIC bus address = 7
|
|
* STx/SCx = 0
|
|
*/
|
|
ISAC_WRITE(I_STCR, ISAC_STCR_TBA2|ISAC_STCR_TBA1|ISAC_STCR_TBA0);
|
|
|
|
/* MODE: Mode Register:
|
|
* MDSx - transparent mode 2
|
|
* TMD - timer mode = external
|
|
* RAC - Receiver enabled
|
|
* DIMx - digital i/f mode
|
|
*/
|
|
ISAC_WRITE(I_MODE, ISAC_MODE_MDS2|ISAC_MODE_MDS1|ISAC_MODE_RAC|ISAC_MODE_DIM0);
|
|
}
|
|
|
|
#ifdef NOTDEF
|
|
/*
|
|
* XXX a transmitter reset causes an ISAC tx IRQ which will not
|
|
* be serviced at attach time under some circumstances leaving
|
|
* the associated IRQ line on the ISA bus active. This prevents
|
|
* any further interrupts to be serviced because no low -> high
|
|
* transition can take place anymore. (-hm)
|
|
*/
|
|
|
|
/* command register:
|
|
* RRES - HDLC receiver reset
|
|
* XRES - transmitter reset
|
|
*/
|
|
ISAC_WRITE(I_CMDR, ISAC_CMDR_RRES|ISAC_CMDR_XRES);
|
|
ISACCMDRWRDELAY();
|
|
#endif
|
|
|
|
/* enabled interrupts:
|
|
* ===================
|
|
* RME - receive message end
|
|
* RPF - receive pool full
|
|
* XPR - transmit pool ready
|
|
* CISQ - CI or S/Q channel change
|
|
* EXI - extended interrupt
|
|
*/
|
|
|
|
ISAC_IMASK = ISAC_MASK_RSC | /* auto mode only */
|
|
ISAC_MASK_TIN | /* timer irq */
|
|
ISAC_MASK_SIN; /* sync xfer irq */
|
|
|
|
ISAC_WRITE(I_MASK, ISAC_IMASK);
|
|
|
|
return(0);
|
|
}
|
|
|
|
#endif /* NISIC > 0 */
|