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

     /*      $OpenBSD: com_isa.c,v 1.10 2022/04/06 18:59:28 naddy Exp $      */
     /*
      * Copyright (c) 1997 - 1999, Jason Downs.  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. Neither the name(s) of the author(s) nor the name OpenBSD
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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.
     */
    /*-
     * Copyright (c) 1993, 1994, 1995, 1996
     *      Charles M. Hannum.  All rights reserved.
     * Copyright (c) 1991 The 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. 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.
     *
     *      @(#)com.c       7.5 (Berkeley) 5/16/91
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/tty.h>
    #include <sys/device.h>
    
    #include <machine/bus.h>
    
    #include <dev/ic/comreg.h>
    #include <dev/ic/comvar.h>
    
    #include <dev/isa/isavar.h>
    
    int com_isa_probe(struct device *, void *, void *);
    void com_isa_attach(struct device *, struct device *, void *);
    
    const struct cfattach com_isa_ca = {
            sizeof(struct com_softc), com_isa_probe, com_isa_attach, NULL,
            com_activate
    };
    
    int
    com_isa_probe(struct device *parent, void *match, void *aux)
    {
            struct isa_attach_args *ia = aux;
            bus_space_handle_t ioh;
            bus_space_tag_t iot;
            int iobase;
            int rv;
    
            iot = ia->ia_iot;
            iobase = ia->ia_iobase;
    
            if (iobase == comconsaddr && !comconsattached)
                    goto out;
    
            if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
                    return (0);
    
           rv = comprobe1(iot, ioh);
   
           bus_space_unmap(iot, ioh, COM_NPORTS);
   
           if (rv == 0)
                   return (0);
   
   out:
           ia->ia_iosize = COM_NPORTS;
           ia->ia_msize = 0;
           return (1);
   }
   
   void
   com_isa_attach(struct device *parent, struct device *self, void *aux)
   {
           struct com_softc *sc = (struct com_softc *)self;
           struct isa_attach_args *ia = aux;
           bus_space_handle_t ioh;
           bus_space_tag_t iot;
           int iobase, irq;
   
           sc->sc_hwflags = 0;
           sc->sc_swflags = 0;
   
           iobase = ia->ia_iobase;
           iot = ia->ia_iot;
   
           if (iobase != comconsaddr) {
                   if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
                           panic("com_isa_attach: mapping failed");
           } else {
                   ioh = comconsioh;
           }
   
           sc->sc_iot = iot;
           sc->sc_ioh = ioh;
           sc->sc_iobase = iobase;
           sc->sc_frequency = COM_FREQ;
   
           com_attach_subr(sc);
   
           irq = ia->ia_irq;
           if (irq != IRQUNK) {
                   sc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
                           IST_EDGE, IPL_TTY, comintr, sc,
                           sc->sc_dev.dv_xname);
           }
   }

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