FreeBSD/Linux Kernel Cross Reference
sys/dev/radio.c

     /* $NetBSD: radio.c,v 1.19 2006/11/16 01:32:45 christos Exp $ */
     /* $OpenBSD: radio.c,v 1.2 2001/12/05 10:27:06 mickey Exp $ */
     /* $RuOBSD: radio.c,v 1.7 2001/12/04 06:03:05 tm Exp $ */
     
     /*
      * Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net>
      * 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 ``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 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.
     */
    
    /* This is the /dev/radio driver from OpenBSD */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: radio.c,v 1.19 2006/11/16 01:32:45 christos Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/proc.h>
    #include <sys/errno.h>
    #include <sys/ioctl.h>
    #include <sys/device.h>
    #include <sys/vnode.h>
    #include <sys/radioio.h>
    #include <sys/conf.h>
    
    #include <dev/radio_if.h>
    #include <dev/radiovar.h>
    
    int     radioprobe(struct device *, struct cfdata *, void *);
    void    radioattach(struct device *, struct device *, void *);
    int     radioprint(void *, const char *);
    int     radiodetach(struct device *, int);
    int     radioactivate(struct device *, enum devact);
    
    CFATTACH_DECL(radio, sizeof(struct radio_softc),
        radioprobe, radioattach, radiodetach, radioactivate);
    
    dev_type_open(radioopen);
    dev_type_close(radioclose);
    dev_type_ioctl(radioioctl);
    
    const struct cdevsw radio_cdevsw = {
            radioopen, radioclose, noread, nowrite, radioioctl,
            nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
    };
    
    extern struct cfdriver radio_cd;
    
    int
    radioprobe(struct device *parent, struct cfdata *match,
        void *aux)
    {
            return (1);
    }
    
    void
    radioattach(struct device *parent, struct device *self, void *aux)
    {
            struct radio_softc *sc = (void *)self;
            struct radio_attach_args *sa = aux;
            const struct radio_hw_if *hwp = sa->hwif;
            void  *hdlp = sa->hdl;
    
            printf("\n");
            sc->hw_if = hwp;
            sc->hw_hdl = hdlp;
            sc->sc_dev = parent;
    }
    
    int
    radioopen(dev_t dev, int flags, int fmt, struct lwp *l)
    {
            int     unit;
            struct radio_softc *sc;
    
            unit = RADIOUNIT(dev);
            if (unit >= radio_cd.cd_ndevs ||
                (sc = radio_cd.cd_devs[unit]) == NULL ||
                 sc->hw_if == NULL)
                    return (ENXIO);
   
           if (sc->hw_if->open != NULL)
                   return (sc->hw_if->open(sc->hw_hdl, flags, fmt, l->l_proc));
           else
                   return (0);
   }
   
   int
   radioclose(dev_t dev, int flags, int fmt, struct lwp *l)
   {
           struct radio_softc *sc;
   
           sc = radio_cd.cd_devs[RADIOUNIT(dev)];
   
           if (sc->hw_if->close != NULL)
                   return (sc->hw_if->close(sc->hw_hdl, flags, fmt, l->l_proc));
           else
                   return (0);
   }
   
   int
   radioioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
       struct lwp *l)
   {
           struct radio_softc *sc;
           int unit, error;
   
           unit = RADIOUNIT(dev);
           if (unit >= radio_cd.cd_ndevs ||
               (sc = radio_cd.cd_devs[unit]) == NULL || sc->hw_if == NULL)
                   return (ENXIO);
   
           error = EOPNOTSUPP;
           switch (cmd) {
           case RIOCGINFO:
                   if (sc->hw_if->get_info)
                           error = (sc->hw_if->get_info)(sc->hw_hdl,
                                           (struct radio_info *)data);
                           break;
           case RIOCSINFO:
                   if (sc->hw_if->set_info)
                           error = (sc->hw_if->set_info)(sc->hw_hdl,
                                   (struct radio_info *)data);
                   break;
           case RIOCSSRCH:
                   if (sc->hw_if->search)
                           error = (sc->hw_if->search)(sc->hw_hdl,
                                           *(int *)data);
                   break;
           default:
                   error = EINVAL;
           }
   
           return (error);
   }
   
   /*
    * Called from hardware driver. This is where the MI radio driver gets
    * probed/attached to the hardware driver
    */
   struct device *
   radio_attach_mi(const struct radio_hw_if *rhwp, void *hdlp, struct device *dev)
   {
           struct radio_attach_args arg;
   
           arg.hwif = rhwp;
           arg.hdl = hdlp;
           return (config_found(dev, &arg, radioprint));
   }
   
   int
   radioprint(void *aux, const char *pnp)
   {
           if (pnp != NULL)
                   aprint_normal("radio at %s", pnp);
           return (UNCONF);
   }
   
   int
   radiodetach(struct device *self, int flags)
   {
           /*struct radio_softc *sc = (struct radio_softc *)self;*/
           int maj, mn;
   
           /* locate the major number */
           maj = cdevsw_lookup_major(&radio_cdevsw);
   
           /* Nuke the vnodes for any open instances (calls close). */
           mn = device_unit(self);
           vdevgone(maj, mn, mn, VCHR);
   
           return (0);
   }
   
   int
   radioactivate(struct device *self, enum devact act)
   {
           struct radio_softc *sc = (struct radio_softc *)self;
   
           switch (act) {
           case DVACT_ACTIVATE:
                   return (EOPNOTSUPP);
   
           case DVACT_DEACTIVATE:
                   sc->sc_dying = 1;
                   break;
           }
           return (0);
   }

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