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mgnsc.c revision 1.13
      1  1.13  chopps /*	$NetBSD: mgnsc.c,v 1.13 1995/08/18 15:28:01 chopps Exp $	*/
      2   1.6     cgd 
      3   1.1  chopps /*
      4   1.2  chopps  * Copyright (c) 1994 Michael L. Hitch
      5   1.1  chopps  * Copyright (c) 1982, 1990 The Regents of the University of California.
      6   1.1  chopps  * All rights reserved.
      7   1.1  chopps  *
      8   1.1  chopps  * Redistribution and use in source and binary forms, with or without
      9   1.1  chopps  * modification, are permitted provided that the following conditions
     10   1.1  chopps  * are met:
     11   1.1  chopps  * 1. Redistributions of source code must retain the above copyright
     12   1.1  chopps  *    notice, this list of conditions and the following disclaimer.
     13   1.1  chopps  * 2. Redistributions in binary form must reproduce the above copyright
     14   1.1  chopps  *    notice, this list of conditions and the following disclaimer in the
     15   1.1  chopps  *    documentation and/or other materials provided with the distribution.
     16   1.1  chopps  * 3. All advertising materials mentioning features or use of this software
     17   1.1  chopps  *    must display the following acknowledgement:
     18   1.1  chopps  *	This product includes software developed by the University of
     19   1.1  chopps  *	California, Berkeley and its contributors.
     20   1.1  chopps  * 4. Neither the name of the University nor the names of its contributors
     21   1.1  chopps  *    may be used to endorse or promote products derived from this software
     22   1.1  chopps  *    without specific prior written permission.
     23   1.1  chopps  *
     24   1.1  chopps  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25   1.1  chopps  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26   1.1  chopps  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27   1.1  chopps  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28   1.1  chopps  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29   1.1  chopps  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30   1.1  chopps  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31   1.1  chopps  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32   1.1  chopps  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33   1.1  chopps  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34   1.1  chopps  * SUCH DAMAGE.
     35   1.1  chopps  *
     36   1.1  chopps  *	@(#)dma.c
     37   1.1  chopps  */
     38   1.1  chopps 
     39   1.2  chopps #include <sys/param.h>
     40   1.2  chopps #include <sys/systm.h>
     41   1.2  chopps #include <sys/kernel.h>
     42   1.2  chopps #include <sys/device.h>
     43   1.2  chopps #include <scsi/scsi_all.h>
     44   1.2  chopps #include <scsi/scsiconf.h>
     45   1.2  chopps #include <amiga/amiga/custom.h>
     46   1.2  chopps #include <amiga/amiga/cc.h>
     47   1.2  chopps #include <amiga/amiga/device.h>
     48  1.10  chopps #include <amiga/amiga/isr.h>
     49   1.2  chopps #include <amiga/dev/siopreg.h>
     50   1.2  chopps #include <amiga/dev/siopvar.h>
     51   1.8  chopps #include <amiga/dev/zbusvar.h>
     52   1.2  chopps 
     53   1.2  chopps int mgnscprint __P((void *auxp, char *));
     54   1.2  chopps void mgnscattach __P((struct device *, struct device *, void *));
     55   1.2  chopps int mgnscmatch __P((struct device *, struct cfdata *, void *));
     56  1.11  chopps int siopintr __P((struct siop_softc *));
     57  1.10  chopps int mgnsc_dmaintr __P((struct siop_softc *));
     58   1.2  chopps 
     59   1.2  chopps struct scsi_adapter mgnsc_scsiswitch = {
     60   1.2  chopps 	siop_scsicmd,
     61   1.2  chopps 	siop_minphys,
     62   1.2  chopps 	0,			/* no lun support */
     63   1.2  chopps 	0,			/* no lun support */
     64   1.2  chopps };
     65   1.2  chopps 
     66   1.2  chopps struct scsi_device mgnsc_scsidev = {
     67   1.2  chopps 	NULL,		/* use default error handler */
     68   1.2  chopps 	NULL,		/* do not have a start functio */
     69   1.2  chopps 	NULL,		/* have no async handler */
     70   1.2  chopps 	NULL,		/* Use default done routine */
     71   1.2  chopps };
     72   1.2  chopps 
     73   1.2  chopps 
     74   1.2  chopps #ifdef DEBUG
     75   1.2  chopps #endif
     76   1.2  chopps 
     77   1.2  chopps struct cfdriver mgnsccd = {
     78   1.7  chopps 	NULL, "mgnsc", (cfmatch_t)mgnscmatch, mgnscattach,
     79   1.2  chopps 	DV_DULL, sizeof(struct siop_softc), NULL, 0 };
     80   1.2  chopps 
     81   1.1  chopps /*
     82   1.2  chopps  * if we are a CSA Magnum 40 SCSI
     83   1.1  chopps  */
     84   1.2  chopps int
     85   1.2  chopps mgnscmatch(pdp, cdp, auxp)
     86   1.2  chopps 	struct device *pdp;
     87   1.2  chopps 	struct cfdata *cdp;
     88   1.2  chopps 	void *auxp;
     89   1.2  chopps {
     90   1.8  chopps 	struct zbus_args *zap;
     91   1.2  chopps 
     92   1.2  chopps 	zap = auxp;
     93   1.2  chopps 	if (zap->manid == 1058 && zap->prodid == 17)
     94   1.2  chopps 		return(1);
     95   1.2  chopps 	return(0);
     96   1.2  chopps }
     97   1.2  chopps 
     98   1.2  chopps void
     99   1.2  chopps mgnscattach(pdp, dp, auxp)
    100   1.2  chopps 	struct device *pdp, *dp;
    101   1.2  chopps 	void *auxp;
    102   1.2  chopps {
    103   1.2  chopps 	struct siop_softc *sc;
    104   1.8  chopps 	struct zbus_args *zap;
    105   1.2  chopps 	siop_regmap_p rp;
    106   1.2  chopps 
    107   1.4  chopps 	printf("\n");
    108   1.2  chopps 	zap = auxp;
    109  1.13  chopps 
    110   1.2  chopps 	sc = (struct siop_softc *)dp;
    111   1.5  chopps 	sc->sc_siopp = rp = zap->va + 0x8000;
    112   1.1  chopps 
    113   1.2  chopps 	/*
    114   1.2  chopps 	 * DCNTL = 25.01->37.5MHZ / SCLK/1.5
    115   1.2  chopps 	 * CTEST7 = TT1
    116   1.2  chopps 	 */
    117   1.2  chopps 	sc->sc_clock_freq = 0x0240;
    118  1.13  chopps 
    119  1.12  chopps 	alloc_sicallback();
    120   1.1  chopps 
    121   1.2  chopps 	sc->sc_link.adapter_softc = sc;
    122   1.9  chopps 	sc->sc_link.adapter_target = 7;
    123   1.2  chopps 	sc->sc_link.adapter = &mgnsc_scsiswitch;
    124   1.2  chopps 	sc->sc_link.device = &mgnsc_scsidev;
    125  1.13  chopps 	sc->sc_link.openings = 2;
    126  1.13  chopps 
    127  1.13  chopps 	siopinitialize(sc);
    128   1.1  chopps 
    129  1.10  chopps 	sc->sc_isr.isr_intr = mgnsc_dmaintr;
    130  1.10  chopps 	sc->sc_isr.isr_arg = sc;
    131  1.11  chopps 	sc->sc_isr.isr_ipl = 6;
    132  1.10  chopps 	add_isr (&sc->sc_isr);
    133   1.2  chopps 
    134   1.2  chopps 	/*
    135   1.2  chopps 	 * attach all scsi units on us
    136   1.2  chopps 	 */
    137   1.2  chopps 	config_found(dp, &sc->sc_link, mgnscprint);
    138   1.2  chopps }
    139   1.2  chopps 
    140   1.2  chopps /*
    141   1.2  chopps  * print diag if pnp is NULL else just extra
    142   1.2  chopps  */
    143   1.2  chopps int
    144   1.2  chopps mgnscprint(auxp, pnp)
    145   1.2  chopps 	void *auxp;
    146   1.2  chopps 	char *pnp;
    147   1.1  chopps {
    148   1.2  chopps 	if (pnp == NULL)
    149   1.2  chopps 		return(UNCONF);
    150   1.2  chopps 	return(QUIET);
    151   1.1  chopps }
    152   1.1  chopps 
    153  1.11  chopps /*
    154  1.11  chopps  * Level 6 interrupt processing for the Magnum/40 SCSI. Because the
    155  1.11  chopps  * level 6 interrupt is above splbio, the interrupt status is saved
    156  1.11  chopps  * and an sicallback to the level 2 interrupt handler scheduled.
    157  1.11  chopps  * This way, the actual processing of the interrupt can be deferred
    158  1.11  chopps  * until splbio is unblocked.
    159  1.11  chopps  */
    160  1.12  chopps 
    161   1.2  chopps int
    162  1.10  chopps mgnsc_dmaintr(sc)
    163  1.10  chopps 	struct siop_softc *sc;
    164   1.2  chopps {
    165   1.2  chopps 	siop_regmap_p rp;
    166   1.2  chopps 	u_char istat;
    167   1.2  chopps 
    168  1.13  chopps 	if (sc->sc_flags & SIOP_INTSOFF)
    169  1.13  chopps 		return (0);	/* interrupts are not active */
    170  1.10  chopps 	rp = sc->sc_siopp;
    171  1.10  chopps 	istat = rp->siop_istat;
    172  1.10  chopps 	if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
    173  1.10  chopps 		return (0);
    174  1.10  chopps 	/*
    175  1.10  chopps 	 * save interrupt status, DMA status, and SCSI status 0
    176  1.10  chopps 	 * (may need to deal with stacked interrupts?)
    177  1.10  chopps 	 */
    178  1.13  chopps 	sc->sc_sstat0 = rp->siop_sstat0;
    179  1.10  chopps 	sc->sc_istat = istat;
    180  1.10  chopps 	sc->sc_dstat = rp->siop_dstat;
    181  1.13  chopps 	/*
    182  1.13  chopps 	 * disable interrupts until the callback can process this
    183  1.13  chopps 	 * interrupt.
    184  1.13  chopps 	 */
    185  1.13  chopps 	rp->siop_sien = 0;
    186  1.13  chopps 	rp->siop_dien = 0;
    187  1.13  chopps 	sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
    188  1.12  chopps 	add_sicallback (siopintr, sc, NULL);
    189  1.10  chopps 	return (1);
    190   1.2  chopps }
    191