FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/sb_isa.c

     /*      $OpenBSD: sb_isa.c,v 1.12 2022/04/06 18:59:28 naddy Exp $       */
     /*      $NetBSD: sb_isa.c,v 1.15 1997/11/30 15:32:25 drochner Exp $     */
     
     /*
      * Copyright (c) 1991-1993 Regents of the University of California.
      * All rights reserved.
      *
      * 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 Computer Systems
     *      Engineering Group at Lawrence Berkeley Laboratory.
     * 4. Neither the name of the University nor of the Laboratory 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.
     *
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/errno.h>
    #include <sys/ioctl.h>
    #include <sys/syslog.h>
    #include <sys/device.h>
    
    #include <machine/bus.h>
    
    #include <sys/audioio.h>
    #include <dev/audio_if.h>
    #include <dev/midi_if.h>
    
    #include <dev/isa/isavar.h>
    #include <dev/isa/isadmavar.h>
    
    #include <dev/isa/sbreg.h>
    #include <dev/isa/sbvar.h>
    
    #include <dev/isa/sbdspvar.h>
    
    static  int sbfind(struct device *, struct sbdsp_softc *, struct isa_attach_args *);
    
    int     sb_isa_match(struct device *, void *, void *);
    void    sb_isa_attach(struct device *, struct device *, void *);
    
    const struct cfattach sb_isa_ca = {
            sizeof(struct sbdsp_softc), sb_isa_match, sb_isa_attach
    };
    
    /*
     * Probe / attach routines.
     */
    
    /*
     * Probe for the soundblaster hardware.
     */
    int
    sb_isa_match(struct device *parent, void *match, void *aux)
    {
            struct sbdsp_softc probesc, *sc = &probesc;
    
            bzero(sc, sizeof *sc);
            sc->sc_dev.dv_cfdata = ((struct device *)match)->dv_cfdata;
            strlcpy(sc->sc_dev.dv_xname, "sb", sizeof sc->sc_dev.dv_xname);
            return sbfind(parent, sc, aux);
    }
    
    static int
    sbfind(struct device *parent, struct sbdsp_softc *sc,
        struct isa_attach_args *ia)
    {
            int rc = 0;
    
            if (!SB_BASE_VALID(ia->ia_iobase))
                    return 0;
    
            sc->sc_iot = ia->ia_iot;
    
            /* Map i/o space [we map 24 ports which is the max of the sb and pro] */
            if (bus_space_map(sc->sc_iot, ia->ia_iobase, SBP_NPORT, 0,
                &sc->sc_ioh))
                   return 0;
   
           sc->sc_iobase = ia->ia_iobase;
           sc->sc_irq = ia->ia_irq;
           sc->sc_drq8 = ia->ia_drq;
           sc->sc_drq16 = ia->ia_drq2;
           sc->sc_ic = ia->ia_ic;
   
           if (!sbmatch(sc))
                   goto bad;
   
           if ((sc->sc_drq8 != -1 && !isa_drq_isfree(parent, sc->sc_drq8)) ||
               (sc->sc_drq16 != -1 && !isa_drq_isfree(parent, sc->sc_drq16)))
                   goto bad;
   
           if (ISSBPROCLASS(sc))
                   ia->ia_iosize = SBP_NPORT;
           else
                   ia->ia_iosize = SB_NPORT;
   
           if (!ISSB16CLASS(sc) && sc->sc_model != SB_JAZZ)
                   ia->ia_drq2 = -1;
   
           ia->ia_irq = sc->sc_irq;
   
           rc = 1;
   
   bad:
           bus_space_unmap(sc->sc_iot, sc->sc_ioh, SBP_NPORT);
           return rc;
   }
   
   
   /*
    * Attach hardware to driver, attach hardware driver to audio
    * pseudo-device driver .
    */
   void
   sb_isa_attach(struct device *parent, struct device *self, void *aux)
   {
           struct sbdsp_softc *sc = (struct sbdsp_softc *)self;
           struct isa_attach_args *ia = aux;
   
           if (!sbfind(parent, sc, ia) || 
               bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
               &sc->sc_ioh)) {
                   printf("%s: sbfind failed\n", sc->sc_dev.dv_xname);
                   return;
           }
           sc->sc_ic = ia->ia_ic;
           sc->sc_isa = parent;
           sbattach(sc);
   }

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