예제 #1
0
static int
isicattach(int flags, struct isic_softc *sc)
{
	int ret = 0;
	const char *drvid;

#ifdef __FreeBSD__

	struct isic_softc *sc = &l1_sc[dev->id_unit];
#define	PARM	dev
#define	PARM2	dev, iobase2
#define	FLAGS	dev->id_flags

#elif defined(__bsdi__)

	struct isic_softc *sc = device_private(self);
#define	PARM	parent, self, ia
#define	PARM2	parent, self, ia
#define	FLAGS	sc->sc_flags

#else

#define PARM	sc
#define PARM2	sc
#define	FLAGS	flags

#endif /* __FreeBSD__ */

  	static const char *ISACversion[] = {
  		"2085 Version A1/A2 or 2086/2186 Version 1.1",
		"2085 Version B1",
		"2085 Version B2",
		"2085 Version V2.3 (B3)",
		"Unknown Version"
	};

	static const char *HSCXversion[] = {
		"82525 Version A1",
		"Unknown (0x01)",
		"82525 Version A2",
		"Unknown (0x03)",
		"82525 Version A3",
		"82525 or 21525 Version 2.1",
		"Unknown Version"
	};

	/* card dependent setup */
	switch(FLAGS)
	{
#ifdef ISICISA_DYNALINK
#if defined(__bsdi__) || defined(__FreeBSD__)
		case FLAG_DYNALINK:
			ret = isic_attach_Dyn(PARM2);
			break;
#endif
#endif

#ifdef ISICISA_TEL_S0_8
		case FLAG_TELES_S0_8:
			ret = isic_attach_s08(PARM);
			break;
#endif

#ifdef ISICISA_TEL_S0_16
		case FLAG_TELES_S0_16:
			ret = isic_attach_s016(PARM);
			break;
#endif

#ifdef ISICISA_TEL_S0_16_3
		case FLAG_TELES_S0_163:
			ret = isic_attach_s0163(PARM);
			break;
#endif

#ifdef ISICISA_AVM_A1
		case FLAG_AVM_A1:
			ret = isic_attach_avma1(PARM);
			break;
#endif

#ifdef ISICISA_USR_STI
		case FLAG_USR_ISDN_TA_INT:
			ret = isic_attach_usrtai(PARM);
			break;
#endif

#ifdef ISICISA_ITKIX1
		case FLAG_ITK_IX1:
			ret = isic_attach_itkix1(PARM);
			break;
#endif

#ifdef ISICISA_ELSA_PCC16
		case FLAG_ELSA_PCC16:
			ret = isic_attach_Eqs1pi(dev, 0);
			break;
#endif

#ifdef amiga
		case FLAG_BLMASTER:
			ret = 1; /* full detection was done in caller */
			break;
#endif

/* ======================================================================
 * Only P&P cards follow below!!!
 */

#ifdef __FreeBSD__		/* we've already splitted all non-ISA stuff
				   out of this ISA specific part for the other
				   OS */

#ifdef AVM_A1_PCMCIA
		case FLAG_AVM_A1_PCMCIA:
                      ret = isic_attach_fritzpcmcia(PARM);
			break;
#endif

#ifdef TEL_S0_16_3_P
		case FLAG_TELES_S0_163_PnP:
			ret = isic_attach_s0163P(PARM2);
			break;
#endif

#ifdef CRTX_S0_P
		case FLAG_CREATIX_S0_PnP:
			ret = isic_attach_Cs0P(PARM2);
			break;
#endif

#ifdef DRN_NGO
		case FLAG_DRN_NGO:
			ret = isic_attach_drnngo(PARM2);
			break;
#endif

#ifdef SEDLBAUER
		case FLAG_SWS:
			ret = isic_attach_sws(PARM);
			break;
#endif

#ifdef ELSA_QS1ISA
		case FLAG_ELSA_QS1P_ISA:
			ret = isic_attach_Eqs1pi(PARM2);
			break;
#endif

#ifdef AVM_PNP
		case FLAG_AVM_PNP:
			ret = isic_attach_avm_pnp(PARM2);
			ret = 0;
			break;
#endif

#ifdef SIEMENS_ISURF2
		case FLAG_SIEMENS_ISURF2:
			ret = isic_attach_siemens_isurf(PARM2);
			break;
#endif

#ifdef ASUSCOM_IPAC
		case FLAG_ASUSCOM_IPAC:
			ret = isic_attach_asi(PARM2);
			break;
#endif

#endif /* __FreeBSD__ / P&P specific part */

		default:
			break;
	}

	if(ret == 0)
		return(0);

	if(sc->sc_ipac)
	{
		sc->sc_ipac_version = IPAC_READ(IPAC_ID);

		switch(sc->sc_ipac_version)
		{
			case IPAC_V11:
			case IPAC_V12:
				break;

			default:
				aprint_error_dev(sc->sc_dev, "Error, IPAC version %d unknown!\n", ret);
				return(0);
				break;
		}
	}
	else
	{
		sc->sc_isac_version = ((ISAC_READ(I_RBCH)) >> 5) & 0x03;

		switch(sc->sc_isac_version)
		{
			case ISAC_VA:
			case ISAC_VB1:
			case ISAC_VB2:
			case ISAC_VB3:
				break;

			default:
				printf(ISIC_FMT "Error, ISAC version %d unknown!\n",
				ISIC_PARM, sc->sc_isac_version);
				return(0);
				break;
		}

		sc->sc_hscx_version = HSCX_READ(0, H_VSTR) & 0xf;

		switch(sc->sc_hscx_version)
		{
			case HSCX_VA1:
			case HSCX_VA2:
			case HSCX_VA3:
			case HSCX_V21:
				break;

			default:
				printf(ISIC_FMT "Error, HSCX version %d unknown!\n",
					ISIC_PARM, sc->sc_hscx_version);
				return(0);
				break;
		}
	}

        sc->sc_intr_valid = ISIC_INTR_DISABLED;

	/* HSCX setup */

	isic_bchannel_setup(sc, HSCX_CH_A, BPROT_NONE, 0);

	isic_bchannel_setup(sc, HSCX_CH_B, BPROT_NONE, 0);

	/* setup linktab */

	isic_init_linktab(sc);

	/* set trace level */

	sc->sc_trace = TRACE_OFF;

	sc->sc_state = ISAC_IDLE;

	sc->sc_ibuf = NULL;
	sc->sc_ib = NULL;
	sc->sc_ilen = 0;

	sc->sc_obuf = NULL;
	sc->sc_op = NULL;
	sc->sc_ol = 0;
	sc->sc_freeflag = 0;

	sc->sc_obuf2 = NULL;
	sc->sc_freeflag2 = 0;

#if defined(__FreeBSD__) && __FreeBSD__ >=3
	callout_handle_init(&sc->sc_T3_callout);
	callout_handle_init(&sc->sc_T4_callout);
#endif

#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
	callout_init(&sc->sc_T3_callout, 0);
	callout_init(&sc->sc_T4_callout, 0);
#endif

	/* announce manufacturer and card type */

	switch(FLAGS)
	{
		case FLAG_TELES_S0_8:
			drvid = "Teles S0/8 or Niccy 1008";
			break;

		case FLAG_TELES_S0_16:
			drvid = "Teles S0/16, Creatix ISDN S0-16 or Niccy 1016";
			break;

		case FLAG_TELES_S0_163:
			drvid = "Teles S0/16.3";
			break;

		case FLAG_AVM_A1:
			drvid = "AVM A1 or AVM Fritz!Card";
			break;

		case FLAG_AVM_A1_PCMCIA:
			drvid = "AVM PCMCIA Fritz!Card";
			break;

		case FLAG_TELES_S0_163_PnP:
			drvid = "Teles S0/PnP";
			break;

		case FLAG_CREATIX_S0_PnP:
			drvid = "Creatix ISDN S0-16 P&P";
			break;

		case FLAG_USR_ISDN_TA_INT:
			drvid = "USRobotics Sportster ISDN TA intern";
			break;

		case FLAG_DRN_NGO:
			drvid = "Dr. Neuhaus NICCY Go@";
			break;

		case FLAG_DYNALINK:
			drvid = "Dynalink IS64PH";
			break;

		case FLAG_SWS:
			drvid = "Sedlbauer WinSpeed";
			break;

		case FLAG_BLMASTER:
			/* board announcement was done by caller */
			drvid = (char *)0;
			break;

		case FLAG_ELSA_QS1P_ISA:
			drvid = "ELSA QuickStep 1000pro (ISA)";
			break;

		case FLAG_ITK_IX1:
			drvid = "ITK ix1 micro";
			break;

		case FLAG_ELSA_PCC16:
			drvid = "ELSA PCC-16";
			break;

		case FLAG_ASUSCOM_IPAC:
			drvid = "Asuscom ISDNlink 128K PnP";
			break;

		case FLAG_SIEMENS_ISURF2:
			drvid = "Siemens I-Surf 2.0";
			break;

		default:
			drvid = "ERROR, unknown flag used";
			break;
	}
#ifndef __FreeBSD__
	printf("\n");
#endif
	if (drvid)
		printf(ISIC_FMT "%s\n", ISIC_PARM, drvid);

	/* announce chip versions */

	if(sc->sc_ipac)
	{
		if(sc->sc_ipac_version == IPAC_V11)
			printf(ISIC_FMT "IPAC PSB2115 Version 1.1\n", ISIC_PARM);
		else
			printf(ISIC_FMT "IPAC PSB2115 Version 1.2\n", ISIC_PARM);
	}
	else
	{
		if(sc->sc_isac_version >= ISAC_UNKN)
		{
			printf(ISIC_FMT "ISAC Version UNKNOWN (VN=0x%x)" TERMFMT,
					ISIC_PARM,
					sc->sc_isac_version);
			sc->sc_isac_version = ISAC_UNKN;
		}
		else
		{
			printf(ISIC_FMT "ISAC %s (IOM-%c)" TERMFMT,
					ISIC_PARM,
					ISACversion[sc->sc_isac_version],
					sc->sc_bustyp == BUS_TYPE_IOM1 ? '1' : '2');
		}

#ifdef __FreeBSD__
		printf("(Addr=0x%lx)\n", (u_long)ISAC_BASE);
#endif

		if(sc->sc_hscx_version >= HSCX_UNKN)
		{
			printf(ISIC_FMT "HSCX Version UNKNOWN (VN=0x%x)" TERMFMT,
					ISIC_PARM,
					sc->sc_hscx_version);
			sc->sc_hscx_version = HSCX_UNKN;
		}
		else
		{
			printf(ISIC_FMT "HSCX %s" TERMFMT,
					ISIC_PARM,
					HSCXversion[sc->sc_hscx_version]);
		}

#ifdef __FreeBSD__
		printf("(AddrA=0x%lx, AddrB=0x%lx)\n", (u_long)HSCX_A_BASE, (u_long)HSCX_B_BASE);

#endif /* __FreeBSD__ */
	}

#ifdef __FreeBSD__
	next_isic_unit++;

#if defined(__FreeBSD_version) && __FreeBSD_version >= 300003

	/* set the interrupt handler - no need to change isa_device.h */
	dev->id_intr = (inthand2_t *)isicintr;

#endif

#endif /* __FreeBSD__ */

	/* init higher protocol layers */
	isic_attach_bri(sc, drvid, &isic_std_driver);

	return(1);
#undef PARM
#undef FLAGS
}
예제 #2
0
/*---------------------------------------------------------------------------*
 *	isic_attach_common - common attach routine for all busses
 *---------------------------------------------------------------------------*/
int
isic_attach_common(device_t dev)
{
	char *drvid = NULL;
	int unit = device_get_unit(dev);
	struct l1_softc *sc = &l1_sc[unit];
	
	sc->sc_unit = unit;
	
	sc->sc_isac_version = 0;
	sc->sc_hscx_version = 0;

	if(sc->sc_ipac)
	{
		sc->sc_ipac_version = IPAC_READ(IPAC_ID);

		switch(sc->sc_ipac_version)
  		{
			case IPAC_V11:
			case IPAC_V12:
  				break;

  			default:
  				printf("isic%d: Error, IPAC version %d unknown!\n",
  					unit, sc->sc_ipac_version);
  				return(0);
  				break;
		}
	}
	else
	{
		sc->sc_isac_version = ((ISAC_READ(I_RBCH)) >> 5) & 0x03;
	
		switch(sc->sc_isac_version)
		{
			case ISAC_VA:
			case ISAC_VB1:
			case ISAC_VB2:
			case ISAC_VB3:
				break;
	
			default:
				printf("isic%d: Error, ISAC version %d unknown!\n",
					unit, sc->sc_isac_version);
				return ENXIO;
				break;
		}

		sc->sc_hscx_version = HSCX_READ(0, H_VSTR) & 0xf;

		switch(sc->sc_hscx_version)
		{
			case HSCX_VA1:
			case HSCX_VA2:
			case HSCX_VA3:
			case HSCX_V21:
				break;
				
			default:
				printf("isic%d: Error, HSCX version %d unknown!\n",
					unit, sc->sc_hscx_version);
				return ENXIO;
				break;
		}
	}
	
	isic_isac_init(sc);		/* ISAC setup */

	/* HSCX setup */

	isic_bchannel_setup(sc->sc_unit, HSCX_CH_A, BPROT_NONE, 0);
	
	isic_bchannel_setup(sc->sc_unit, HSCX_CH_B, BPROT_NONE, 0);

	isic_init_linktab(sc);		/* setup linktab */

	sc->sc_trace = TRACE_OFF;	/* set trace level */

	sc->sc_state = ISAC_IDLE;	/* set state */

	sc->sc_ibuf = NULL;		/* input buffering */
	sc->sc_ib = NULL;
	sc->sc_ilen = 0;

	sc->sc_obuf = NULL;		/* output buffering */
	sc->sc_op = NULL;
	sc->sc_ol = 0;
	sc->sc_freeflag = 0;

	sc->sc_obuf2 = NULL;		/* second output buffer */
	sc->sc_freeflag2 = 0;

	/* timer setup */
	
	callout_handle_init(&sc->sc_T3_callout);
	callout_handle_init(&sc->sc_T4_callout);	
	
	/* init higher protocol layers */
	
	i4b_l1_mph_status_ind(L0ISICUNIT(sc->sc_unit), STI_ATTACH, sc->sc_cardtyp, &isic_l1mux_func);

	/* announce manufacturer and card type for ISA cards */
	
	switch(sc->sc_cardtyp)
	{
		case CARD_TYPEP_8:
			drvid = "Teles S0/8 (or compatible)";
			break;

		case CARD_TYPEP_16:
			drvid = "Teles S0/16 (or compatible)";
			break;

		case CARD_TYPEP_16_3:
			drvid = "Teles S0/16.3";
			break;

		case CARD_TYPEP_AVMA1:
			drvid = "AVM A1 or Fritz!Card Classic";
			break;

		case CARD_TYPEP_PCFRITZ:
			drvid = "AVM Fritz!Card PCMCIA";
			break;

		case CARD_TYPEP_USRTA:
			drvid = "USRobotics Sportster ISDN TA intern";
			break;

		case CARD_TYPEP_ITKIX1:
			drvid = "ITK ix1 micro";
			break;

		case CARD_TYPEP_PCC16:
			drvid = "ELSA MicroLink ISDN/PCC-16";
			break;

		default:
			drvid = NULL;	/* pnp/pci cards announce themselves */
			break;
	}

	if(drvid)
		printf("isic%d: %s\n", unit, drvid);
	
	if(bootverbose)
	{
		/* announce chip versions */
		
		if(sc->sc_ipac)
		{
			if(sc->sc_ipac_version == IPAC_V11)
				printf("isic%d: IPAC PSB2115 Version 1.1\n", unit);
			else
				printf("isic%d: IPAC PSB2115 Version 1.2\n", unit);
		}
		else
		{
			printf("isic%d: ISAC %s (IOM-%c)\n",
				unit,
				ISACversion[sc->sc_isac_version],
				sc->sc_bustyp == BUS_TYPE_IOM1 ? '1' : '2');

			printf("isic%d: HSCX %s\n",
				unit,
				HSCXversion[sc->sc_hscx_version]);
		}
	}
	return 0;
}
예제 #3
0
/*---------------------------------------------------------------------------*
 *	isic - device driver interrupt routine
 *---------------------------------------------------------------------------*/
void
isicintr(struct l1_softc *sc)
{
	if(sc->sc_ipac == 0)	/* HSCX/ISAC interupt routine */
	{
		u_char was_hscx_irq = 0;
		u_char was_isac_irq = 0;

		register u_char hscx_irq_stat;
		register u_char isac_irq_stat;

		for(;;)
		{
			/* get hscx irq status from hscx b ista */
			hscx_irq_stat =
	 	    	    HSCX_READ(HSCX_CH_B, H_ISTA) & ~HSCX_B_IMASK;
	
			/* get isac irq status */
			isac_irq_stat = ISAC_READ(I_ISTA);
	
			/* do as long as there are pending irqs in the chips */
			if(!hscx_irq_stat && !isac_irq_stat)
				break;
	
			if(hscx_irq_stat & (HSCX_ISTA_RME | HSCX_ISTA_RPF |
					    HSCX_ISTA_RSC | HSCX_ISTA_XPR |
					    HSCX_ISTA_TIN | HSCX_ISTA_EXB))
			{
				isic_hscx_irq(sc, hscx_irq_stat,
						HSCX_CH_B,
						hscx_irq_stat & HSCX_ISTA_EXB);
				was_hscx_irq = 1;			
			}
			
			if(hscx_irq_stat & (HSCX_ISTA_ICA | HSCX_ISTA_EXA))
			{
				isic_hscx_irq(sc,
				    HSCX_READ(HSCX_CH_A, H_ISTA) & ~HSCX_A_IMASK,
				    HSCX_CH_A,
				    hscx_irq_stat & HSCX_ISTA_EXA);
				was_hscx_irq = 1;
			}
	
			if(isac_irq_stat)
			{
				isic_isac_irq(sc, isac_irq_stat); /* isac handler */
				was_isac_irq = 1;
			}
		}

		HSCX_WRITE(0, H_MASK, 0xff);
		ISAC_WRITE(I_MASK, 0xff);
		HSCX_WRITE(1, H_MASK, 0xff);
	
#ifdef ELSA_QS1ISA
		DELAY(80);
		
		if((sc->sc_cardtyp == CARD_TYPEP_ELSAQS1ISA) && (sc->clearirq))
		{
			sc->clearirq(sc);
		}
#else
		DELAY(100);
#endif	
	
		HSCX_WRITE(0, H_MASK, HSCX_A_IMASK);
		ISAC_WRITE(I_MASK, ISAC_IMASK);
		HSCX_WRITE(1, H_MASK, HSCX_B_IMASK);
	}
	else	/* IPAC interrupt routine */
	{
		register u_char ipac_irq_stat;
		register u_char was_ipac_irq = 0;

		for(;;)
		{
			/* get global irq status */
			
			ipac_irq_stat = (IPAC_READ(IPAC_ISTA)) & 0x3f;
			
			/* check hscx a */
			
			if(ipac_irq_stat & (IPAC_ISTA_ICA | IPAC_ISTA_EXA))
			{
				/* HSCX A interrupt */
				isic_hscx_irq(sc, HSCX_READ(HSCX_CH_A, H_ISTA),
						HSCX_CH_A,
						ipac_irq_stat & IPAC_ISTA_EXA);
				was_ipac_irq = 1;			
			}
			if(ipac_irq_stat & (IPAC_ISTA_ICB | IPAC_ISTA_EXB))
			{
				/* HSCX B interrupt */
				isic_hscx_irq(sc, HSCX_READ(HSCX_CH_B, H_ISTA),
						HSCX_CH_B,
						ipac_irq_stat & IPAC_ISTA_EXB);
				was_ipac_irq = 1;			
			}
			if(ipac_irq_stat & IPAC_ISTA_ICD)
			{
				/* ISAC interrupt */
				isic_isac_irq(sc, ISAC_READ(I_ISTA));
				was_ipac_irq = 1;
			}
			if(ipac_irq_stat & IPAC_ISTA_EXD)
			{
				/* force ISAC interrupt handling */
				isic_isac_irq(sc, ISAC_ISTA_EXI);
				was_ipac_irq = 1;
			}
	
			/* do as long as there are pending irqs in the chip */
			if(!ipac_irq_stat)
				break;
		}

		IPAC_WRITE(IPAC_MASK, 0xff);
		DELAY(50);
		IPAC_WRITE(IPAC_MASK, 0xc0);
	}		
}
예제 #4
0
파일: isic.c 프로젝트: MarginC/kame
/*---------------------------------------------------------------------------*
 *	isic - device driver interrupt routine
 *---------------------------------------------------------------------------*/
int
isicintr(void *arg)
{
	struct isic_softc *sc = arg;

	/* could this be an interrupt for us? */
	if (sc->sc_intr_valid == ISIC_INTR_DYING)
		return 0;	/* do not touch removed hardware */

	if(sc->sc_ipac == 0)	/* HSCX/ISAC interupt routine */
	{
		u_char was_hscx_irq = 0;
		u_char was_isac_irq = 0;

		register u_char hscx_irq_stat;
		register u_char isac_irq_stat;

		for(;;)
		{
			/* get hscx irq status from hscx b ista */
			hscx_irq_stat =
	 	    	    HSCX_READ(HSCX_CH_B, H_ISTA) & ~HSCX_B_IMASK;
	
			/* get isac irq status */
			isac_irq_stat = ISAC_READ(I_ISTA);
	
			/* do as long as there are pending irqs in the chips */
			if(!hscx_irq_stat && !isac_irq_stat)
				break;
	
			if(hscx_irq_stat & (HSCX_ISTA_RME | HSCX_ISTA_RPF |
					    HSCX_ISTA_RSC | HSCX_ISTA_XPR |
					    HSCX_ISTA_TIN | HSCX_ISTA_EXB))
			{
				isic_hscx_irq(sc, hscx_irq_stat,
						HSCX_CH_B,
						hscx_irq_stat & HSCX_ISTA_EXB);
				was_hscx_irq = 1;			
			}
			
			if(hscx_irq_stat & (HSCX_ISTA_ICA | HSCX_ISTA_EXA))
			{
				isic_hscx_irq(sc,
				    HSCX_READ(HSCX_CH_A, H_ISTA) & ~HSCX_A_IMASK,
				    HSCX_CH_A,
				    hscx_irq_stat & HSCX_ISTA_EXA);
				was_hscx_irq = 1;
			}
	
			if(isac_irq_stat)
			{
				/* isac handler */
				isic_isac_irq(sc, isac_irq_stat);
				was_isac_irq = 1;
			}
		}
	
		HSCX_WRITE(0, H_MASK, 0xff);
		ISAC_WRITE(I_MASK, 0xff);
		HSCX_WRITE(1, H_MASK, 0xff);
	
		if (sc->clearirq)
		{
			DELAY(80);
			sc->clearirq(sc);
		} else
			DELAY(100);
	
		HSCX_WRITE(0, H_MASK, HSCX_A_IMASK);
		ISAC_WRITE(I_MASK, ISAC_IMASK);
		HSCX_WRITE(1, H_MASK, HSCX_B_IMASK);

		return(was_hscx_irq || was_isac_irq);
	}
	else	/* IPAC interrupt routine */
	{
		register u_char ipac_irq_stat;
		register u_char was_ipac_irq = 0;

		for(;;)
		{
			/* get global irq status */
			
			ipac_irq_stat = (IPAC_READ(IPAC_ISTA)) & 0x3f;
			
			/* check hscx a */
			
			if(ipac_irq_stat & (IPAC_ISTA_ICA | IPAC_ISTA_EXA))
			{
				/* HSCX A interrupt */
				isic_hscx_irq(sc, HSCX_READ(HSCX_CH_A, H_ISTA),
						HSCX_CH_A,
						ipac_irq_stat & IPAC_ISTA_EXA);
				was_ipac_irq = 1;			
			}
			if(ipac_irq_stat & (IPAC_ISTA_ICB | IPAC_ISTA_EXB))
			{
				/* HSCX B interrupt */
				isic_hscx_irq(sc, HSCX_READ(HSCX_CH_B, H_ISTA),
						HSCX_CH_B,
						ipac_irq_stat & IPAC_ISTA_EXB);
				was_ipac_irq = 1;			
			}
			if(ipac_irq_stat & IPAC_ISTA_ICD)
			{
				/* ISAC interrupt, Obey ISAC-IPAC differences */
				u_int8_t isac_ista = ISAC_READ(I_ISTA);
				if (isac_ista & 0xfe)
					isic_isac_irq(sc, isac_ista & 0xfe);
				if (isac_ista & 0x01) /* unexpected */
					printf("%s: unexpected ipac timer2 irq\n", 
					    sc->sc_dev.dv_xname);
				was_ipac_irq = 1;
			}
			if(ipac_irq_stat & IPAC_ISTA_EXD)
			{
				/* ISAC EXI interrupt */
				isic_isac_irq(sc, ISAC_ISTA_EXI);
				was_ipac_irq = 1;
			}
	
			/* do as long as there are pending irqs in the chip */
			if(!ipac_irq_stat)
				break;
		}

#if 0
		/*
		 * This seems not to be necessary on IPACs - no idea why
		 * it is here - but due to limit range of test cards, leave
		 * it in for now, in case we have to resurrect it.
		 */
		IPAC_WRITE(IPAC_MASK, 0xff);
		DELAY(50);
		IPAC_WRITE(IPAC_MASK, 0xc0);
#endif

		return(was_ipac_irq);
	}		
}