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mgnsc.c revision 1.3 
      1 /*
      2  * Copyright (c) 1994 Michael L. Hitch
      3  * Copyright (c) 1982, 1990 The Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by the University of
     17  *	California, Berkeley and its contributors.
     18  * 4. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)dma.c
     35  *	$Id: mgnsc.c,v 1.3 1994/06/14 00:58:49 chopps Exp $
     36  */
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/kernel.h>
     41 #include <sys/device.h>
     42 #include <scsi/scsi_all.h>
     43 #include <scsi/scsiconf.h>
     44 #include <amiga/amiga/custom.h>
     45 #include <amiga/amiga/cc.h>
     46 #include <amiga/amiga/device.h>
     47 #include <amiga/dev/siopreg.h>
     48 #include <amiga/dev/siopvar.h>
     49 #include <amiga/dev/zthreebusvar.h>
     50 
     51 int mgnscprint __P((void *auxp, char *));
     52 void mgnscattach __P((struct device *, struct device *, void *));
     53 int mgnscmatch __P((struct device *, struct cfdata *, void *));
     54 
     55 struct scsi_adapter mgnsc_scsiswitch = {
     56 	siop_scsicmd,
     57 	siop_minphys,
     58 	0,			/* no lun support */
     59 	0,			/* no lun support */
     60 	siop_adinfo,
     61 	"mgnsc",
     62 };
     63 
     64 struct scsi_device mgnsc_scsidev = {
     65 	NULL,		/* use default error handler */
     66 	NULL,		/* do not have a start functio */
     67 	NULL,		/* have no async handler */
     68 	NULL,		/* Use default done routine */
     69 	"mgnsc",
     70 	0,
     71 };
     72 
     73 
     74 #ifdef DEBUG
     75 #endif
     76 
     77 struct cfdriver mgnsccd = {
     78 	NULL, "mgnsc", mgnscmatch, mgnscattach,
     79 	DV_DULL, sizeof(struct siop_softc), NULL, 0 };
     80 
     81 /*
     82  * if we are a CSA Magnum 40 SCSI
     83  */
     84 int
     85 mgnscmatch(pdp, cdp, auxp)
     86 	struct device *pdp;
     87 	struct cfdata *cdp;
     88 	void *auxp;
     89 {
     90 	struct zthreebus_args *zap;
     91 
     92 	zap = auxp;
     93 	if (zap->manid == 1058 && zap->prodid == 17)
     94 		return(1);
     95 	return(0);
     96 }
     97 
     98 void
     99 mgnscattach(pdp, dp, auxp)
    100 	struct device *pdp, *dp;
    101 	void *auxp;
    102 {
    103 	struct siop_softc *sc;
    104 	struct zthreebus_args *zap;
    105 	siop_regmap_p rp;
    106 
    107 	zap = auxp;
    108 
    109 	sc = (struct siop_softc *)dp;
    110 	sc->sc_siopp = rp = zap->va + 0x40000;
    111 
    112 	/*
    113 	 * DCNTL = 25.01->37.5MHZ / SCLK/1.5
    114 	 * CTEST7 = TT1
    115 	 */
    116 	sc->sc_clock_freq = 0x0240;
    117 
    118 	siopinitialize(sc);
    119 
    120 	sc->sc_link.adapter_softc = sc;
    121 	sc->sc_link.adapter_targ = 7;
    122 	sc->sc_link.adapter = &mgnsc_scsiswitch;
    123 	sc->sc_link.device = &mgnsc_scsidev;
    124 	TAILQ_INIT(&sc->sc_xslist);
    125 
    126 	custom.intreq = INTF_PORTS;
    127 	custom.intena = INTF_SETCLR | INTF_PORTS;
    128 
    129 	/*
    130 	 * attach all scsi units on us
    131 	 */
    132 	config_found(dp, &sc->sc_link, mgnscprint);
    133 }
    134 
    135 /*
    136  * print diag if pnp is NULL else just extra
    137  */
    138 int
    139 mgnscprint(auxp, pnp)
    140 	void *auxp;
    141 	char *pnp;
    142 {
    143 	if (pnp == NULL)
    144 		return(UNCONF);
    145 	return(QUIET);
    146 }
    147 
    148 
    149 int
    150 mgnsc_dmaintr()
    151 {
    152 	siop_regmap_p rp;
    153 	struct siop_softc *dev;
    154 	int i, found;
    155 	u_char istat;
    156 
    157 	found = 0;
    158 	for (i = 0; i < mgnsccd.cd_ndevs; i++) {
    159 		dev = mgnsccd.cd_devs[i];
    160 		if (dev == NULL)
    161 			continue;
    162 		rp = dev->sc_siopp;
    163 		istat = rp->siop_istat;
    164 		if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
    165 			continue;
    166 		if ((dev->sc_flags & (SIOP_DMA | SIOP_SELECTED)) == SIOP_SELECTED)
    167 			continue;	/* doing non-interrupt I/O */
    168 		found++;
    169 		dev->sc_istat = istat;
    170 		dev->sc_dstat = rp->siop_dstat;
    171 		dev->sc_sstat0 = rp->siop_sstat0;
    172 		siopintr(dev);
    173 	}
    174 	return(found);
    175 }
    176