The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /* $NetBSD: radio.c,v 1.19 2006/11/16 01:32:45 christos Exp $ */
    2 /* $OpenBSD: radio.c,v 1.2 2001/12/05 10:27:06 mickey Exp $ */
    3 /* $RuOBSD: radio.c,v 1.7 2001/12/04 06:03:05 tm Exp $ */
    4 
    5 /*
    6  * Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net>
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   24  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   27  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  */
   29 
   30 /* This is the /dev/radio driver from OpenBSD */
   31 
   32 #include <sys/cdefs.h>
   33 __KERNEL_RCSID(0, "$NetBSD: radio.c,v 1.19 2006/11/16 01:32:45 christos Exp $");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/proc.h>
   38 #include <sys/errno.h>
   39 #include <sys/ioctl.h>
   40 #include <sys/device.h>
   41 #include <sys/vnode.h>
   42 #include <sys/radioio.h>
   43 #include <sys/conf.h>
   44 
   45 #include <dev/radio_if.h>
   46 #include <dev/radiovar.h>
   47 
   48 int     radioprobe(struct device *, struct cfdata *, void *);
   49 void    radioattach(struct device *, struct device *, void *);
   50 int     radioprint(void *, const char *);
   51 int     radiodetach(struct device *, int);
   52 int     radioactivate(struct device *, enum devact);
   53 
   54 CFATTACH_DECL(radio, sizeof(struct radio_softc),
   55     radioprobe, radioattach, radiodetach, radioactivate);
   56 
   57 dev_type_open(radioopen);
   58 dev_type_close(radioclose);
   59 dev_type_ioctl(radioioctl);
   60 
   61 const struct cdevsw radio_cdevsw = {
   62         radioopen, radioclose, noread, nowrite, radioioctl,
   63         nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
   64 };
   65 
   66 extern struct cfdriver radio_cd;
   67 
   68 int
   69 radioprobe(struct device *parent, struct cfdata *match,
   70     void *aux)
   71 {
   72         return (1);
   73 }
   74 
   75 void
   76 radioattach(struct device *parent, struct device *self, void *aux)
   77 {
   78         struct radio_softc *sc = (void *)self;
   79         struct radio_attach_args *sa = aux;
   80         const struct radio_hw_if *hwp = sa->hwif;
   81         void  *hdlp = sa->hdl;
   82 
   83         printf("\n");
   84         sc->hw_if = hwp;
   85         sc->hw_hdl = hdlp;
   86         sc->sc_dev = parent;
   87 }
   88 
   89 int
   90 radioopen(dev_t dev, int flags, int fmt, struct lwp *l)
   91 {
   92         int     unit;
   93         struct radio_softc *sc;
   94 
   95         unit = RADIOUNIT(dev);
   96         if (unit >= radio_cd.cd_ndevs ||
   97             (sc = radio_cd.cd_devs[unit]) == NULL ||
   98              sc->hw_if == NULL)
   99                 return (ENXIO);
  100 
  101         if (sc->hw_if->open != NULL)
  102                 return (sc->hw_if->open(sc->hw_hdl, flags, fmt, l->l_proc));
  103         else
  104                 return (0);
  105 }
  106 
  107 int
  108 radioclose(dev_t dev, int flags, int fmt, struct lwp *l)
  109 {
  110         struct radio_softc *sc;
  111 
  112         sc = radio_cd.cd_devs[RADIOUNIT(dev)];
  113 
  114         if (sc->hw_if->close != NULL)
  115                 return (sc->hw_if->close(sc->hw_hdl, flags, fmt, l->l_proc));
  116         else
  117                 return (0);
  118 }
  119 
  120 int
  121 radioioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
  122     struct lwp *l)
  123 {
  124         struct radio_softc *sc;
  125         int unit, error;
  126 
  127         unit = RADIOUNIT(dev);
  128         if (unit >= radio_cd.cd_ndevs ||
  129             (sc = radio_cd.cd_devs[unit]) == NULL || sc->hw_if == NULL)
  130                 return (ENXIO);
  131 
  132         error = EOPNOTSUPP;
  133         switch (cmd) {
  134         case RIOCGINFO:
  135                 if (sc->hw_if->get_info)
  136                         error = (sc->hw_if->get_info)(sc->hw_hdl,
  137                                         (struct radio_info *)data);
  138                         break;
  139         case RIOCSINFO:
  140                 if (sc->hw_if->set_info)
  141                         error = (sc->hw_if->set_info)(sc->hw_hdl,
  142                                 (struct radio_info *)data);
  143                 break;
  144         case RIOCSSRCH:
  145                 if (sc->hw_if->search)
  146                         error = (sc->hw_if->search)(sc->hw_hdl,
  147                                         *(int *)data);
  148                 break;
  149         default:
  150                 error = EINVAL;
  151         }
  152 
  153         return (error);
  154 }
  155 
  156 /*
  157  * Called from hardware driver. This is where the MI radio driver gets
  158  * probed/attached to the hardware driver
  159  */
  160 struct device *
  161 radio_attach_mi(const struct radio_hw_if *rhwp, void *hdlp, struct device *dev)
  162 {
  163         struct radio_attach_args arg;
  164 
  165         arg.hwif = rhwp;
  166         arg.hdl = hdlp;
  167         return (config_found(dev, &arg, radioprint));
  168 }
  169 
  170 int
  171 radioprint(void *aux, const char *pnp)
  172 {
  173         if (pnp != NULL)
  174                 aprint_normal("radio at %s", pnp);
  175         return (UNCONF);
  176 }
  177 
  178 int
  179 radiodetach(struct device *self, int flags)
  180 {
  181         /*struct radio_softc *sc = (struct radio_softc *)self;*/
  182         int maj, mn;
  183 
  184         /* locate the major number */
  185         maj = cdevsw_lookup_major(&radio_cdevsw);
  186 
  187         /* Nuke the vnodes for any open instances (calls close). */
  188         mn = device_unit(self);
  189         vdevgone(maj, mn, mn, VCHR);
  190 
  191         return (0);
  192 }
  193 
  194 int
  195 radioactivate(struct device *self, enum devact act)
  196 {
  197         struct radio_softc *sc = (struct radio_softc *)self;
  198 
  199         switch (act) {
  200         case DVACT_ACTIVATE:
  201                 return (EOPNOTSUPP);
  202 
  203         case DVACT_DEACTIVATE:
  204                 sc->sc_dying = 1;
  205                 break;
  206         }
  207         return (0);
  208 }

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