FreeBSD/Linux Kernel Cross Reference
sys/isa/isahint.c

     /*-
      * Copyright (c) 1999 Doug Rabson
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD: releng/5.1/sys/isa/isahint.c 78135 2001-06-12 09:40:04Z peter $
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/module.h>
    #include <isa/isavar.h>
    #include <machine/resource.h>
    
    static void
    isahint_add_device(device_t parent, const char *name, int unit)
    {
            device_t        child;
            int             sensitive, start, count, t;
            int             order;
    
            /* device-specific flag overrides any wildcard */
            sensitive = 0;
            if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
                    resource_int_value(name, -1, "sensitive", &sensitive);
    
            if (sensitive)
                    order = ISA_ORDER_SENSITIVE;
            else
                    order = ISA_ORDER_SPECULATIVE;
    
            child = BUS_ADD_CHILD(parent, order, name, unit);
            if (child == 0)
                    return;
    
            start = 0;
            count = 0;
            resource_int_value(name, unit, "port", &start);
            resource_int_value(name, unit, "portsize", &count);
            if (start > 0 || count > 0)
                    bus_set_resource(child, SYS_RES_IOPORT, 0, start, count);
    
            start = 0;
            count = 0;
            resource_int_value(name, unit, "maddr", &start);
            resource_int_value(name, unit, "msize", &count);
            if (start > 0 || count > 0)
                    bus_set_resource(child, SYS_RES_MEMORY, 0, start, count);
    
            if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
                    bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
    
            if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
                    bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
    
            if (resource_int_value(name, unit, "flags", &t) == 0)
                    device_set_flags(child, t);
    
            if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
                    device_disable(child);
    }
    
    static void
    isahint_identify(driver_t *driver, device_t parent)
    {
            int i;
            static char buf[] = "isaXXX";
            const char *dname;
            int dunit;
    
            /*
             * Add all devices configured to be attached to parent.
             */
            sprintf(buf, "isa%d", device_get_unit(parent));
            i = 0;
            while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
                    if (strcmp(dname, "atkbd") == 0)
                           continue;       /* old GENERIC kludge */
                   isahint_add_device(parent, dname, dunit);
           }
   
           /*
            * and isa?
            */
           i = 0;
           while ((resource_find_match(&i, &dname, &dunit, "at", "isa")) == 0) {
                   if (strcmp(dname, "atkbd") == 0)
                           continue;       /* old GENERIC kludge */
                   isahint_add_device(parent, dname, dunit);
           }
   }
   
   static device_method_t isahint_methods[] = {
           /* Device interface */
           DEVMETHOD(device_identify,      isahint_identify),
   
           { 0, 0 }
   };
   
   static driver_t isahint_driver = {
           "hint",
           isahint_methods,
           1,                      /* no softc */
   };
   
   static devclass_t hint_devclass;
   
   DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);

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