BSD 4_4 release

[unix-history] / usr / src / sys / sparc / sbus / sbus.c

/*
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)sbus.c      8.1 (Berkeley) 6/11/93
*
* from: $Header: sbus.c,v 1.10 92/11/26 02:28:13 torek Exp $ (LBL)
*/

/*
* Sbus stuff.
*/

#include <sys/param.h>
#include <sys/device.h>

#include <machine/autoconf.h>

#include <sparc/sbus/sbusreg.h>
#include <sparc/sbus/sbusvar.h>

/* autoconfiguration driver */
void    sbus_attach __P((struct device *, struct device *, void *));
struct cfdriver sbuscd =
   { NULL, "sbus", matchbyname, sbus_attach,
     DV_DULL, sizeof(struct sbus_softc) };

/*
* Print the location of some sbus-attached device (called just
* before attaching that device).  If `sbus' is not NULL, the
* device was found but not configured; print the sbus as well.
* Return UNCONF (config_find ignores this if the device was configured).
*/
int
sbus_print(args, sbus)
       void *args;
       char *sbus;
{
       register struct sbus_attach_args *sa = args;

       if (sbus)
               printf("%s at %s", sa->sa_ra.ra_name, sbus);
       printf(" slot %d offset 0x%x", sa->sa_slot, sa->sa_offset);
       return (UNCONF);
}

/*
* Attach an Sbus.
*/
void
sbus_attach(parent, self, aux)
       struct device *parent;
       struct device *self;
       void *aux;
{
       register struct sbus_softc *sc = (struct sbus_softc *)self;
       register int base, node, slot;
       register char *name;
       struct sbus_attach_args sa;
       register struct romaux *ra;

       /*
        * XXX there is only one Sbus, for now -- do not know how to
        * address children on others
        */
       if (sc->sc_dev.dv_unit > 0) {
               printf(" unsupported\n");
               return;
       }

       /*
        * Record clock frequency for synchronous SCSI.
        * IS THIS THE CORRECT DEFAULT??
        */
       ra = aux;
       node = ra->ra_node;
       sc->sc_clockfreq = getpropint(node, "clock-frequency", 25*1000*1000);
       printf(": clock = %s MHz\n", clockfreq(sc->sc_clockfreq));

       if (ra->ra_bp != NULL && strcmp(ra->ra_bp->name, "sbus") == 0)
               sa.sa_ra.ra_bp = ra->ra_bp + 1;
       else
               sa.sa_ra.ra_bp = NULL;

       /*
        * Loop through ROM children, fixing any relative addresses
        * and then configuring each device.
        */
       for (node = firstchild(node); node; node = nextsibling(node)) {
               name = getpropstring(node, "name");
               if (!romprop(&sa.sa_ra, name, node))
                       continue;
               base = (int)sa.sa_ra.ra_paddr;
               if (SBUS_ABS(base)) {
                       sa.sa_slot = SBUS_ABS_TO_SLOT(base);
                       sa.sa_offset = SBUS_ABS_TO_OFFSET(base);
               } else {
                       sa.sa_slot = slot = sa.sa_ra.ra_iospace;
                       sa.sa_offset = base;
                       sa.sa_ra.ra_paddr = (void *)SBUS_ADDR(slot, base);
               }
               (void) config_found(&sc->sc_dev, (void *)&sa, sbus_print);
       }
}

/*
* Each attached device calls sbus_establish after it initializes
* its sbusdev portion.
*/
void
sbus_establish(sd, dev)
       register struct sbusdev *sd;
       register struct device *dev;
{
       register struct sbus_softc *sc = (struct sbus_softc *)dev->dv_parent;

       sd->sd_dev = dev;
       sd->sd_bchain = sc->sc_sbdev;
       sc->sc_sbdev = sd;
}

/*
* Reset the given sbus. (???)
*/
void
sbusreset(sbus)
       int sbus;
{
       register struct sbusdev *sd;
       struct sbus_softc *sc = sbuscd.cd_devs[sbus];
       struct device *dev;

       printf("reset %s:", sc->sc_dev.dv_xname);
       for (sd = sc->sc_sbdev; sd != NULL; sd = sd->sd_bchain) {
               if (sd->sd_reset) {
                       dev = sd->sd_dev;
                       (*sd->sd_reset)(dev);
                       printf(" %s", dev->dv_xname);
               }
       }
}