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asc.c revision 1.12.2.1
      1  1.12.2.1    skrll /*	$NetBSD: asc.c,v 1.12.2.1 2004/08/03 10:30:55 skrll Exp $	*/
      2       1.1  reinoud 
      3       1.1  reinoud /*
      4       1.1  reinoud  * Copyright (c) 2001 Richard Earnshaw
      5       1.1  reinoud  * All rights reserved.
      6       1.1  reinoud  *
      7       1.1  reinoud  * 1. Redistributions of source code must retain the above copyright
      8       1.1  reinoud  *    notice, this list of conditions and the following disclaimer.
      9       1.1  reinoud  * 2. Redistributions in binary form must reproduce the above copyright
     10       1.1  reinoud  *    notice, this list of conditions and the following disclaimer in the
     11       1.1  reinoud  *    documentation and/or other materials provided with the distribution.
     12       1.1  reinoud  * 3. The name of the company nor the name of the author may be used to
     13       1.1  reinoud  *    endorse or promote products derived from this software without specific
     14       1.1  reinoud  *    prior written permission.
     15       1.1  reinoud  *
     16       1.1  reinoud  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17       1.1  reinoud  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18       1.1  reinoud  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19       1.1  reinoud  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     20       1.1  reinoud  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     21       1.1  reinoud  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     22       1.1  reinoud  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23       1.1  reinoud  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24       1.1  reinoud  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25       1.1  reinoud  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26       1.1  reinoud  * POSSIBILITY OF SUCH DAMAGE.
     27       1.1  reinoud  *
     28       1.1  reinoud  * Copyright (c) 1982, 1990 The Regents of the University of California.
     29       1.1  reinoud  * All rights reserved.
     30       1.1  reinoud  *
     31       1.1  reinoud  * Redistribution and use in source and binary forms, with or without
     32       1.1  reinoud  * modification, are permitted provided that the following conditions
     33       1.1  reinoud  * are met:
     34       1.1  reinoud  * 1. Redistributions of source code must retain the above copyright
     35       1.1  reinoud  *    notice, this list of conditions and the following disclaimer.
     36       1.1  reinoud  * 2. Redistributions in binary form must reproduce the above copyright
     37       1.1  reinoud  *    notice, this list of conditions and the following disclaimer in the
     38       1.1  reinoud  *    documentation and/or other materials provided with the distribution.
     39  1.12.2.1    skrll  * 3. Neither the name of the University nor the names of its contributors
     40  1.12.2.1    skrll  *    may be used to endorse or promote products derived from this software
     41  1.12.2.1    skrll  *    without specific prior written permission.
     42  1.12.2.1    skrll  *
     43  1.12.2.1    skrll  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     44  1.12.2.1    skrll  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     45  1.12.2.1    skrll  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     46  1.12.2.1    skrll  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     47  1.12.2.1    skrll  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     48  1.12.2.1    skrll  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     49  1.12.2.1    skrll  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     50  1.12.2.1    skrll  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     51  1.12.2.1    skrll  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     52  1.12.2.1    skrll  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     53  1.12.2.1    skrll  * SUCH DAMAGE.
     54  1.12.2.1    skrll  *
     55  1.12.2.1    skrll  * Copyright (c) 1996 Mark Brinicombe
     56  1.12.2.1    skrll  *
     57  1.12.2.1    skrll  * Redistribution and use in source and binary forms, with or without
     58  1.12.2.1    skrll  * modification, are permitted provided that the following conditions
     59  1.12.2.1    skrll  * are met:
     60  1.12.2.1    skrll  * 1. Redistributions of source code must retain the above copyright
     61  1.12.2.1    skrll  *    notice, this list of conditions and the following disclaimer.
     62  1.12.2.1    skrll  * 2. Redistributions in binary form must reproduce the above copyright
     63  1.12.2.1    skrll  *    notice, this list of conditions and the following disclaimer in the
     64  1.12.2.1    skrll  *    documentation and/or other materials provided with the distribution.
     65       1.1  reinoud  * 3. All advertising materials mentioning features or use of this software
     66       1.1  reinoud  *    must display the following acknowledgement:
     67       1.1  reinoud  *	This product includes software developed by the University of
     68       1.1  reinoud  *	California, Berkeley and its contributors.
     69       1.1  reinoud  * 4. Neither the name of the University nor the names of its contributors
     70       1.1  reinoud  *    may be used to endorse or promote products derived from this software
     71       1.1  reinoud  *    without specific prior written permission.
     72       1.1  reinoud  *
     73       1.1  reinoud  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     74       1.1  reinoud  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     75       1.1  reinoud  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     76       1.1  reinoud  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     77       1.1  reinoud  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     78       1.1  reinoud  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     79       1.1  reinoud  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     80       1.1  reinoud  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     81       1.1  reinoud  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     82       1.1  reinoud  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     83       1.1  reinoud  * SUCH DAMAGE.
     84       1.1  reinoud  *
     85       1.1  reinoud  *	from:ahsc.c
     86       1.1  reinoud  */
     87       1.1  reinoud 
     88       1.1  reinoud /*
     89       1.1  reinoud  * Driver for the Acorn SCSI card using the SBIC (WD33C93A) generic driver
     90       1.1  reinoud  *
     91       1.1  reinoud  * Thanks to Acorn for supplying programming information on this card.
     92       1.1  reinoud  */
     93       1.1  reinoud 
     94       1.1  reinoud /* #define ASC_DMAMAP_DEBUG */
     95       1.1  reinoud /* #define DEBUG */
     96       1.1  reinoud 
     97       1.1  reinoud #include "opt_ddb.h"
     98       1.1  reinoud 
     99       1.1  reinoud #include <sys/param.h>
    100       1.4    bjh21 
    101  1.12.2.1    skrll __KERNEL_RCSID(0, "$NetBSD: asc.c,v 1.12.2.1 2004/08/03 10:30:55 skrll Exp $");
    102       1.4    bjh21 
    103       1.1  reinoud #include <sys/systm.h>
    104       1.1  reinoud #include <sys/kernel.h>
    105       1.1  reinoud #include <sys/device.h>
    106       1.1  reinoud #include <sys/buf.h>
    107       1.1  reinoud 
    108       1.1  reinoud #include <uvm/uvm_extern.h>
    109       1.1  reinoud 
    110       1.1  reinoud #include <machine/bus.h>
    111       1.3  thorpej #include <machine/intr.h>
    112       1.1  reinoud #include <machine/bootconfig.h>		/* asc_poll */
    113       1.1  reinoud 
    114       1.1  reinoud #include <dev/scsipi/scsi_all.h>
    115       1.1  reinoud #include <dev/scsipi/scsipi_all.h>
    116       1.1  reinoud #include <dev/scsipi/scsiconf.h>
    117       1.1  reinoud 
    118       1.2  thorpej #include <arm/arm32/katelib.h>
    119       1.1  reinoud 
    120       1.1  reinoud #include <dev/podulebus/podules.h>
    121       1.1  reinoud #include <dev/podulebus/powerromreg.h>
    122       1.1  reinoud 
    123       1.1  reinoud #include <acorn32/podulebus/podulebus.h>
    124       1.1  reinoud #include <acorn32/podulebus/sbicreg.h>
    125       1.1  reinoud #include <acorn32/podulebus/sbicvar.h>
    126       1.1  reinoud #include <acorn32/podulebus/ascreg.h>
    127       1.1  reinoud #include <acorn32/podulebus/ascvar.h>
    128       1.1  reinoud 
    129       1.1  reinoud void ascattach		(struct device *, struct device *, void *);
    130       1.1  reinoud int  ascmatch		(struct device *, struct cfdata *, void *);
    131       1.1  reinoud 
    132       1.1  reinoud void asc_enintr		(struct sbic_softc *);
    133       1.1  reinoud 
    134       1.1  reinoud int  asc_dmaok		(void *, bus_dma_tag_t, struct sbic_acb *);
    135       1.1  reinoud int  asc_dmasetup	(void *, bus_dma_tag_t, struct sbic_acb *, int);
    136       1.1  reinoud int  asc_dmanext	(void *, bus_dma_tag_t, struct sbic_acb *, int);
    137       1.1  reinoud void asc_dmastop	(void *, bus_dma_tag_t, struct sbic_acb *);
    138       1.1  reinoud void asc_dmafinish	(void *, bus_dma_tag_t, struct sbic_acb *);
    139       1.1  reinoud 
    140       1.1  reinoud int  asc_intr		(void *);
    141       1.1  reinoud void asc_minphys	(struct buf *);
    142       1.1  reinoud 
    143       1.4    bjh21 void asc_dump		(void);
    144       1.4    bjh21 
    145       1.1  reinoud #ifdef DEBUG
    146       1.1  reinoud int	asc_dmadebug = 0;
    147       1.1  reinoud #endif
    148       1.1  reinoud 
    149      1.10  thorpej CFATTACH_DECL(asc, sizeof(struct asc_softc),
    150      1.11  thorpej     ascmatch, ascattach, NULL, NULL);
    151       1.1  reinoud 
    152       1.1  reinoud extern struct cfdriver asc_cd;
    153       1.1  reinoud 
    154       1.1  reinoud u_long scsi_nosync;
    155       1.1  reinoud int shift_nosync;
    156       1.1  reinoud 
    157       1.1  reinoud #if ASC_POLL > 0
    158       1.1  reinoud int asc_poll = 0;
    159       1.1  reinoud 
    160       1.1  reinoud #endif
    161       1.1  reinoud 
    162       1.1  reinoud int
    163       1.1  reinoud ascmatch(struct device *pdp, struct cfdata *cf, void *auxp)
    164       1.1  reinoud {
    165       1.1  reinoud 	struct podule_attach_args *pa = (struct podule_attach_args *)auxp;
    166       1.1  reinoud 
    167       1.1  reinoud 	/* Look for the card */
    168       1.1  reinoud 
    169       1.1  reinoud 	/* Standard ROM, skipping the MCS card that used the same ID. */
    170       1.6    bjh21 	if (pa->pa_product == PODULE_ACORN_SCSI &&
    171       1.1  reinoud 	    strncmp(pa->pa_podule->description, "MCS", 3) != 0)
    172       1.1  reinoud 		return 1;
    173       1.1  reinoud 
    174       1.1  reinoud 	/* PowerROM */
    175       1.1  reinoud         if (pa->pa_product == PODULE_ALSYSTEMS_SCSI &&
    176       1.1  reinoud             podulebus_initloader(pa) == 0 &&
    177       1.1  reinoud             podloader_callloader(pa, 0, 0) == PRID_ACORN_SCSI1)
    178       1.1  reinoud                 return 1;
    179       1.1  reinoud 
    180       1.1  reinoud 	return 0;
    181       1.1  reinoud }
    182       1.1  reinoud 
    183       1.1  reinoud void
    184       1.1  reinoud ascattach(struct device *pdp, struct device *dp, void *auxp)
    185       1.1  reinoud {
    186       1.1  reinoud 	/* volatile struct sdmac *rp;*/
    187       1.1  reinoud 	struct asc_softc *sc;
    188       1.1  reinoud 	struct sbic_softc *sbic;
    189       1.1  reinoud 	struct podule_attach_args *pa;
    190       1.1  reinoud 
    191       1.1  reinoud 	sc = (struct asc_softc *)dp;
    192       1.1  reinoud 	pa = (struct podule_attach_args *)auxp;
    193       1.1  reinoud 
    194       1.1  reinoud 	if (pa->pa_podule_number == -1)
    195       1.1  reinoud 		panic("Podule has disappeared !");
    196       1.1  reinoud 
    197       1.1  reinoud 	sc->sc_podule_number = pa->pa_podule_number;
    198       1.1  reinoud 	sc->sc_podule = pa->pa_podule;
    199       1.1  reinoud 	podules[sc->sc_podule_number].attached = 1;
    200       1.1  reinoud 
    201       1.1  reinoud 	sbic = &sc->sc_softc;
    202       1.1  reinoud 
    203       1.1  reinoud 	sbic->sc_enintr = asc_enintr;
    204       1.1  reinoud 	sbic->sc_dmaok = asc_dmaok;
    205       1.1  reinoud 	sbic->sc_dmasetup = asc_dmasetup;
    206       1.1  reinoud 	sbic->sc_dmanext = asc_dmanext;
    207       1.1  reinoud 	sbic->sc_dmastop = asc_dmastop;
    208       1.1  reinoud 	sbic->sc_dmafinish = asc_dmafinish;
    209       1.1  reinoud 
    210       1.1  reinoud 	/* Map sbic */
    211       1.1  reinoud 	sbic->sc_sbicp.sc_sbiciot = pa->pa_iot;
    212       1.1  reinoud 	if (bus_space_map (sbic->sc_sbicp.sc_sbiciot,
    213       1.1  reinoud 	    sc->sc_podule->mod_base + ASC_SBIC, ASC_SBIC_SPACE, 0,
    214       1.1  reinoud 	    &sbic->sc_sbicp.sc_sbicioh))
    215       1.8   provos 		panic("%s: Cannot map SBIC", dp->dv_xname);
    216       1.1  reinoud 
    217       1.1  reinoud 	sbic->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143;
    218       1.1  reinoud 
    219       1.1  reinoud 	sbic->sc_adapter.adapt_dev = &sbic->sc_dev;
    220       1.1  reinoud 	sbic->sc_adapter.adapt_nchannels = 1;
    221       1.1  reinoud 	sbic->sc_adapter.adapt_openings = 7;
    222       1.1  reinoud 	sbic->sc_adapter.adapt_max_periph = 1;
    223       1.1  reinoud 	sbic->sc_adapter.adapt_ioctl = NULL;
    224       1.1  reinoud 	sbic->sc_adapter.adapt_minphys = asc_minphys;
    225       1.7    bjh21 	sbic->sc_adapter.adapt_request = sbic_scsi_request;
    226       1.1  reinoud 
    227       1.1  reinoud 	sbic->sc_channel.chan_adapter = &sbic->sc_adapter;
    228       1.1  reinoud 	sbic->sc_channel.chan_bustype = &scsi_bustype;
    229       1.1  reinoud 	sbic->sc_channel.chan_channel = 0;
    230       1.1  reinoud 	sbic->sc_channel.chan_ntargets = 8;
    231       1.1  reinoud 	sbic->sc_channel.chan_nluns = 8;
    232       1.1  reinoud 	sbic->sc_channel.chan_id = 7;
    233       1.1  reinoud 
    234       1.1  reinoud 	/* Provide an override for the host id */
    235       1.1  reinoud 	(void)get_bootconf_option(boot_args, "asc.hostid",
    236       1.1  reinoud 	    BOOTOPT_TYPE_INT, &sbic->sc_channel.chan_id);
    237       1.1  reinoud 
    238       1.1  reinoud 	printf(": hostid=%d", sbic->sc_channel.chan_id);
    239       1.1  reinoud 
    240       1.1  reinoud #if ASC_POLL > 0
    241       1.1  reinoud         if (boot_args)
    242       1.1  reinoud 		get_bootconf_option(boot_args, "ascpoll", BOOTOPT_TYPE_BOOLEAN,
    243       1.1  reinoud 		    &asc_poll);
    244       1.1  reinoud 
    245       1.7    bjh21 	if (asc_poll) {
    246       1.7    bjh21 		sbic->sc_adapter.adapt_flags |= SCSIPI_ADAPT_POLL_ONLY;
    247       1.1  reinoud 		printf(" polling");
    248       1.7    bjh21 	}
    249       1.1  reinoud #endif
    250       1.1  reinoud 	printf("\n");
    251       1.1  reinoud 
    252       1.1  reinoud 	sc->sc_pagereg = sc->sc_podule->fast_base + ASC_PAGEREG;
    253       1.1  reinoud         sc->sc_intstat = sc->sc_podule->fast_base + ASC_INTSTATUS;
    254       1.1  reinoud 
    255       1.1  reinoud 	/* Reset the card */
    256       1.1  reinoud 
    257       1.1  reinoud 	WriteByte(sc->sc_pagereg, 0x80);
    258       1.1  reinoud 	DELAY(500000);
    259       1.1  reinoud 	WriteByte(sc->sc_pagereg, 0x00);
    260       1.1  reinoud 	DELAY(250000);
    261       1.1  reinoud 
    262       1.1  reinoud 	sbicinit(sbic);
    263       1.1  reinoud 
    264       1.1  reinoud 	/* If we are polling only, we don't need a interrupt handler.  */
    265       1.1  reinoud 
    266       1.1  reinoud #ifdef ASC_POLL
    267       1.1  reinoud 	if (!asc_poll)
    268       1.1  reinoud #endif
    269       1.1  reinoud 	{
    270       1.1  reinoud 		evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
    271       1.1  reinoud 		    dp->dv_xname, "intr");
    272       1.1  reinoud 		sc->sc_ih = podulebus_irq_establish(pa->pa_ih, IPL_BIO,
    273       1.1  reinoud 		    asc_intr, sc, &sc->sc_intrcnt);
    274       1.1  reinoud 		if (sc->sc_ih == NULL)
    275       1.8   provos 			panic("%s: Cannot claim podule IRQ", dp->dv_xname);
    276       1.1  reinoud 	}
    277       1.1  reinoud 
    278       1.1  reinoud 	/*
    279       1.1  reinoud 	 * attach all scsi units on us
    280       1.1  reinoud 	 */
    281       1.1  reinoud 	config_found(dp, &sbic->sc_channel, scsiprint);
    282       1.1  reinoud }
    283       1.1  reinoud 
    284       1.1  reinoud 
    285       1.1  reinoud void
    286       1.1  reinoud asc_enintr(struct sbic_softc *sbicsc)
    287       1.1  reinoud {
    288       1.1  reinoud 	struct asc_softc *sc = (struct asc_softc *)sbicsc;
    289       1.1  reinoud 
    290       1.1  reinoud 	sbicsc->sc_flags |= SBICF_INTR;
    291       1.1  reinoud 	WriteByte(sc->sc_pagereg, 0x40);
    292       1.1  reinoud }
    293       1.1  reinoud 
    294       1.1  reinoud int
    295       1.1  reinoud asc_dmaok (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb)
    296       1.1  reinoud {
    297       1.1  reinoud 	return 0;
    298       1.1  reinoud }
    299       1.1  reinoud 
    300       1.1  reinoud int
    301       1.1  reinoud asc_dmasetup (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb, int dir)
    302       1.1  reinoud {
    303       1.1  reinoud 	printf("asc_dmasetup()");
    304       1.1  reinoud #ifdef DDB
    305       1.1  reinoud 	Debugger();
    306       1.1  reinoud #else
    307       1.8   provos 	panic("Hit a brick wall");
    308       1.1  reinoud #endif
    309       1.1  reinoud 	return 0;
    310       1.1  reinoud }
    311       1.1  reinoud 
    312       1.1  reinoud int
    313       1.1  reinoud asc_dmanext (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb, int dir)
    314       1.1  reinoud {
    315       1.1  reinoud 	printf("asc_dmanext()");
    316       1.1  reinoud #ifdef DDB
    317       1.1  reinoud 	Debugger();
    318       1.1  reinoud #else
    319       1.8   provos 	panic("Hit a brick wall");
    320       1.1  reinoud #endif
    321       1.1  reinoud 	return 0;
    322       1.1  reinoud }
    323       1.1  reinoud 
    324       1.1  reinoud void
    325       1.1  reinoud asc_dmastop (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb)
    326       1.1  reinoud {
    327       1.1  reinoud 	printf("asc_dmastop\n");
    328       1.1  reinoud }
    329       1.1  reinoud 
    330       1.1  reinoud void
    331       1.1  reinoud asc_dmafinish (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb)
    332       1.1  reinoud {
    333       1.1  reinoud 	printf("asc_dmafinish\n");
    334       1.1  reinoud }
    335       1.1  reinoud 
    336       1.1  reinoud void
    337       1.1  reinoud asc_dump(void)
    338       1.1  reinoud {
    339       1.1  reinoud 	int i;
    340       1.1  reinoud 
    341       1.1  reinoud 	for (i = 0; i < asc_cd.cd_ndevs; ++i)
    342       1.1  reinoud 		if (asc_cd.cd_devs[i])
    343       1.1  reinoud 			sbic_dump(asc_cd.cd_devs[i]);
    344       1.1  reinoud }
    345       1.1  reinoud 
    346       1.1  reinoud int
    347       1.1  reinoud asc_intr(void *arg)
    348       1.1  reinoud {
    349       1.1  reinoud 	struct asc_softc *sc = arg;
    350       1.1  reinoud 	int intr;
    351       1.1  reinoud 
    352       1.1  reinoud 	/* printf("ascintr:");*/
    353       1.1  reinoud        	intr = ReadByte(sc->sc_intstat);
    354       1.1  reinoud 	/* printf("%02x\n", intr);*/
    355       1.1  reinoud 
    356       1.1  reinoud 	if (intr & IS_SBIC_IRQ)
    357       1.1  reinoud 		sbicintr((struct sbic_softc *)sc);
    358       1.1  reinoud 
    359       1.1  reinoud 	return 0;	/* Pass interrupt on down the chain */
    360       1.1  reinoud }
    361       1.1  reinoud 
    362       1.1  reinoud /*
    363       1.1  reinoud  * limit the transfer as required.
    364       1.1  reinoud  */
    365       1.1  reinoud void
    366       1.1  reinoud asc_minphys(struct buf *bp)
    367       1.1  reinoud {
    368       1.1  reinoud #if 0
    369       1.1  reinoud 	/*
    370       1.1  reinoud 	 * We must limit the DMA xfer size
    371       1.1  reinoud 	 */
    372       1.1  reinoud 	if (bp->b_bcount > MAX_DMA_LEN) {
    373      1.12      wiz 		printf("asc: Reducing DMA length\n");
    374       1.1  reinoud 		bp->b_bcount = MAX_DMA_LEN;
    375       1.1  reinoud 	}
    376       1.1  reinoud #endif
    377       1.1  reinoud 	minphys(bp);
    378       1.1  reinoud }
    379       1.1  reinoud 
    380