FreeBSD/Linux Kernel Cross Reference
sys/dev/snc/if_snc_pccard.c

     /*-
      * Copyright (c) 1995, David Greenman
      * 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 unmodified, 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.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     *      National Semiconductor  DP8393X SONIC Driver
     *
     *      This is the PC-Card attachment on FreeBSD
     *              written by Motomichi Matsuzaki <mzaki@e-mail.ne.jp> and
     *                         Hiroshi Yamashita <bluemoon@msj.biglobe.ne.jp>
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/socket.h>
    #include <sys/kernel.h>
    
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <machine/bus.h>
    
    #include <net/if.h>
    #include <net/if_arp.h>
    #include <net/if_media.h>
    
    
    #include <dev/snc/dp83932var.h>
    #include <dev/snc/if_sncvar.h>
    #include <dev/snc/if_sncreg.h>
    
    /*
     *      PC-Card (PCMCIA) specific code.
     */
    static int      snc_pccard_probe(device_t);
    static int      snc_pccard_attach(device_t);
    static int      snc_pccard_detach(device_t);
    
    
    static device_method_t snc_pccard_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         snc_pccard_probe),
            DEVMETHOD(device_attach,        snc_pccard_attach),
            DEVMETHOD(device_detach,        snc_pccard_detach),
    
            { 0, 0 }
    };
    
    static driver_t snc_pccard_driver = {
            "snc",
            snc_pccard_methods,
            sizeof(struct snc_softc)
    };
    
    DRIVER_MODULE(snc, pccard, snc_pccard_driver, snc_devclass, 0, 0);
    MODULE_DEPEND(snc, ether, 1, 1, 1);
    
    /*
     *      snc_pccard_detach - unload the driver and clear the table.
     *      XXX TODO:
     *      This is usually called when the card is ejected, but
     *      can be caused by a modunload of a controller driver.
     *      The idea is to reset the driver's view of the device
     *      and ensure that any driver entry points such as
     *      read and write do not hang.
     */
    static int
    snc_pccard_detach(device_t dev)
    {
            struct snc_softc *sc = device_get_softc(dev);
            struct ifnet *ifp = &sc->sc_if;
    
            if (sc->gone) {
                   device_printf(dev, "already unloaded\n");
                   return (0);
           }
           sncshutdown(sc);
           ifp->if_flags &= ~IFF_RUNNING;
           if_detach(ifp);
           sc->gone = 1;
           bus_teardown_intr(dev, sc->irq, sc->irq_handle);
           snc_release_resources(dev);
           return (0);
   }
   
   /* 
    * Probe framework for pccards.  Replicates the standard framework,
    * minus the pccard driver registration and ignores the ether address
    * supplied (from the CIS), relying on the probe to find it instead.
    */
   static int
   snc_pccard_probe(device_t dev)
   {
           int     error;
   
           error = snc_alloc_port(dev, 0);
           error = max(error, snc_alloc_memory(dev, 0));
           error = max(error, snc_alloc_irq(dev, 0, 0));
   
           if (!error && !snc_probe(dev, SNEC_TYPE_PNP))
                   error = ENOENT;
   
           snc_release_resources(dev);
           return (error);
   }
   
   static int
   snc_pccard_attach(device_t dev)
   {
           struct snc_softc *sc = device_get_softc(dev);
           int error;
           
           bzero(sc, sizeof(struct snc_softc));
   
           snc_alloc_port(dev, 0);
           snc_alloc_memory(dev, 0);
           snc_alloc_irq(dev, 0, 0);
                   
           error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET,
                                  sncintr, sc, &sc->irq_handle);
           if (error) {
                   printf("snc_isa_attach: bus_setup_intr() failed\n");
                   snc_release_resources(dev);
                   return (error);
           }              
   
           /* This interface is always enabled. */
           sc->sc_enabled = 1;
   
           /* pccard_get_ether(dev, ether_addr); */
   
           return snc_attach(dev);
   } 

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