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 1.31 2021/08/07 16:19:08 thorpej 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 1.31 2021/08/07 16:19:08 thorpej 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 
   47 #include "ioconf.h"
   48 
   49 struct radio_softc {
   50         void            *hw_hdl;        /* hardware driver handle */
   51         device_t        sc_dev;         /* hardware device struct */
   52         const struct radio_hw_if *hw_if; /* hardware interface */
   53 };
   54 
   55 static int      radioprobe(device_t, cfdata_t, void *);
   56 static void     radioattach(device_t, device_t, void *);
   57 static int      radioprint(void *, const char *);
   58 static int      radiodetach(device_t, int);
   59 
   60 CFATTACH_DECL_NEW(radio, sizeof(struct radio_softc),
   61     radioprobe, radioattach, radiodetach, NULL);
   62 
   63 static dev_type_open(radioopen);
   64 static dev_type_close(radioclose);
   65 static dev_type_ioctl(radioioctl);
   66 
   67 const struct cdevsw radio_cdevsw = {
   68         .d_open = radioopen,
   69         .d_close = radioclose,
   70         .d_read = noread,
   71         .d_write = nowrite,
   72         .d_ioctl = radioioctl,
   73         .d_stop = nostop,
   74         .d_tty = notty,
   75         .d_poll = nopoll,
   76         .d_mmap = nommap,
   77         .d_kqfilter = nokqfilter,
   78         .d_discard = nodiscard,
   79         .d_flag = D_OTHER,
   80 };
   81 
   82 static int
   83 radioprobe(device_t parent, cfdata_t match, void *aux)
   84 {
   85         return (1);
   86 }
   87 
   88 static void
   89 radioattach(device_t parent, device_t self, void *aux)
   90 {
   91         struct radio_softc *sc = device_private(self);
   92         struct radio_attach_args *sa = aux;
   93         const struct radio_hw_if *hwp = sa->hwif;
   94         void  *hdlp = sa->hdl;
   95 
   96         aprint_naive("\n");
   97         aprint_normal("\n");
   98         sc->hw_if = hwp;
   99         sc->hw_hdl = hdlp;
  100         sc->sc_dev = self;
  101 }
  102 
  103 static int
  104 radioopen(dev_t dev, int flags, int fmt, struct lwp *l)
  105 {
  106         int     unit;
  107         struct radio_softc *sc;
  108 
  109         unit = RADIOUNIT(dev);
  110         sc = device_lookup_private(&radio_cd, unit);
  111         if (sc == NULL || sc->hw_if == NULL)
  112                 return (ENXIO);
  113 
  114         if (sc->hw_if->open != NULL)
  115                 return (sc->hw_if->open(sc->hw_hdl, flags, fmt, l->l_proc));
  116         else
  117                 return (0);
  118 }
  119 
  120 static int
  121 radioclose(dev_t dev, int flags, int fmt, struct lwp *l)
  122 {
  123         struct radio_softc *sc;
  124 
  125         sc = device_lookup_private(&radio_cd, RADIOUNIT(dev));
  126 
  127         if (sc->hw_if->close != NULL)
  128                 return (sc->hw_if->close(sc->hw_hdl, flags, fmt, l->l_proc));
  129         else
  130                 return (0);
  131 }
  132 
  133 static int
  134 radioioctl(dev_t dev, u_long cmd, void *data, int flags,
  135     struct lwp *l)
  136 {
  137         struct radio_softc *sc;
  138         int unit, error;
  139 
  140         unit = RADIOUNIT(dev);
  141         sc = device_lookup_private(&radio_cd, unit);
  142         if (sc == NULL || sc->hw_if == NULL)
  143                 return (ENXIO);
  144 
  145         error = EOPNOTSUPP;
  146         switch (cmd) {
  147         case RIOCGINFO:
  148                 if (sc->hw_if->get_info)
  149                         error = (sc->hw_if->get_info)(sc->hw_hdl,
  150                                         (struct radio_info *)data);
  151                 break;
  152         case RIOCSINFO:
  153                 if (sc->hw_if->set_info)
  154                         error = (sc->hw_if->set_info)(sc->hw_hdl,
  155                                 (struct radio_info *)data);
  156                 break;
  157         case RIOCSSRCH:
  158                 if (sc->hw_if->search)
  159                         error = (sc->hw_if->search)(sc->hw_hdl,
  160                                         *(int *)data);
  161                 break;
  162         default:
  163                 error = EINVAL;
  164         }
  165 
  166         return (error);
  167 }
  168 
  169 /*
  170  * Called from hardware driver. This is where the MI radio driver gets
  171  * probed/attached to the hardware driver
  172  */
  173 device_t
  174 radio_attach_mi(const struct radio_hw_if *rhwp, void *hdlp, device_t dev)
  175 {
  176         struct radio_attach_args arg;
  177 
  178         arg.hwif = rhwp;
  179         arg.hdl = hdlp;
  180         return (config_found(dev, &arg, radioprint, CFARGS_NONE));
  181 }
  182 
  183 static int
  184 radioprint(void *aux, const char *pnp)
  185 {
  186         if (pnp != NULL)
  187                 aprint_normal("radio at %s", pnp);
  188         return (UNCONF);
  189 }
  190 
  191 static int
  192 radiodetach(device_t self, int flags)
  193 {
  194         int maj, mn;
  195 
  196         /* locate the major number */
  197         maj = cdevsw_lookup_major(&radio_cdevsw);
  198 
  199         /* Nuke the vnodes for any open instances (calls close). */
  200         mn = device_unit(self);
  201         vdevgone(maj, mn, mn, VCHR);
  202 
  203         return (0);
  204 }

Cache object: 4d508cb16b2290163a93aa470eefe9b7


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