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afsc.c revision 1.6 
      1 /*	$NetBSD: afsc.c,v 1.6 1995/02/12 19:19:00 chopps Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Michael L. Hitch
      5  * Copyright (c) 1982, 1990 The Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)dma.c
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/kernel.h>
     42 #include <sys/device.h>
     43 #include <scsi/scsi_all.h>
     44 #include <scsi/scsiconf.h>
     45 #include <amiga/amiga/custom.h>
     46 #include <amiga/amiga/cc.h>
     47 #include <amiga/amiga/device.h>
     48 #include <amiga/amiga/isr.h>
     49 #include <amiga/dev/siopreg.h>
     50 #include <amiga/dev/siopvar.h>
     51 #include <amiga/dev/zbusvar.h>
     52 
     53 int afscprint __P((void *auxp, char *));
     54 void afscattach __P((struct device *, struct device *, void *));
     55 int afscmatch __P((struct device *, struct cfdata *, void *));
     56 int siopintr __P((struct siop_softc *));
     57 int afsc_dmaintr __P((struct siop_softc *));
     58 
     59 struct scsi_adapter afsc_scsiswitch = {
     60 	siop_scsicmd,
     61 	siop_minphys,
     62 	0,			/* no lun support */
     63 	0,			/* no lun support */
     64 };
     65 
     66 struct scsi_device afsc_scsidev = {
     67 	NULL,		/* use default error handler */
     68 	NULL,		/* do not have a start functio */
     69 	NULL,		/* have no async handler */
     70 	NULL,		/* Use default done routine */
     71 };
     72 
     73 
     74 #ifdef DEBUG
     75 #endif
     76 
     77 struct cfdriver afsccd = {
     78 	NULL, "afsc", (cfmatch_t)afscmatch, afscattach,
     79 	DV_DULL, sizeof(struct siop_softc), NULL, 0 };
     80 
     81 /*
     82  * if we are a Commodore Amiga A4091
     83  */
     84 int
     85 afscmatch(pdp, cdp, auxp)
     86 	struct device *pdp;
     87 	struct cfdata *cdp;
     88 	void *auxp;
     89 {
     90 	struct zbus_args *zap;
     91 
     92 	zap = auxp;
     93 	if (zap->manid == 514 && zap->prodid == 84)
     94 		return(1);
     95 	return(0);
     96 }
     97 
     98 void
     99 afscattach(pdp, dp, auxp)
    100 	struct device *pdp, *dp;
    101 	void *auxp;
    102 {
    103 	struct siop_softc *sc;
    104 	struct zbus_args *zap;
    105 	siop_regmap_p rp;
    106 
    107 	printf("\n");
    108 
    109 	zap = auxp;
    110 
    111 	sc = (struct siop_softc *)dp;
    112 	sc->sc_siopp = rp = zap->va + 0x00800000;
    113 
    114 	/*
    115 	 * DCNTL = 37.51->50MHZ / SCLK/2
    116 	 * CTEST7 = 80 [disable burst]
    117 	 */
    118 	sc->sc_clock_freq = 0x8000;
    119 
    120 
    121 	siopinitialize(sc);
    122 
    123 	sc->sc_link.adapter_softc = sc;
    124 	sc->sc_link.adapter_target = 7;
    125 	sc->sc_link.adapter = &afsc_scsiswitch;
    126 	sc->sc_link.device = &afsc_scsidev;
    127 	sc->sc_link.openings = 1;
    128 	TAILQ_INIT(&sc->sc_xslist);
    129 
    130 	sc->sc_isr.isr_intr = afsc_dmaintr;
    131 	sc->sc_isr.isr_arg = sc;
    132 	sc->sc_isr.isr_ipl = 2;
    133 	add_isr (&sc->sc_isr);
    134 
    135 	/*
    136 	 * attach all scsi units on us
    137 	 */
    138 	config_found(dp, &sc->sc_link, afscprint);
    139 }
    140 
    141 /*
    142  * print diag if pnp is NULL else just extra
    143  */
    144 int
    145 afscprint(auxp, pnp)
    146 	void *auxp;
    147 	char *pnp;
    148 {
    149 	if (pnp == NULL)
    150 		return(UNCONF);
    151 	return(QUIET);
    152 }
    153 
    154 int
    155 afsc_dmaintr(sc)
    156 	struct siop_softc *sc;
    157 {
    158 	siop_regmap_p rp;
    159 	u_char istat;
    160 
    161 	rp = sc->sc_siopp;
    162 	istat = rp->siop_istat;
    163 	if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
    164 		return(0);
    165 	if ((rp->siop_sien | rp->siop_dien) == 0)
    166 		return(0);	/* no interrupts enabled */
    167 	/*
    168 	 * save interrupt status, DMA status, and SCSI status 0
    169 	 * (may need to deal with stacked interrupts?)
    170 	 */
    171 	sc->sc_istat = istat;
    172 	sc->sc_dstat = rp->siop_dstat;
    173 	sc->sc_sstat0 = rp->siop_sstat0;
    174 	siopintr(sc);
    175 	return(1);
    176 }
    177