sys/dev/radio.c

   1 /* $NetBSD: radio.c,v 1.21 2008/06/08 18:18:33 tsutsui 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 1.21 2008/06/08 18:18:33 tsutsui 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 struct radio_softc {
  48         void            *hw_hdl;        /* hardware driver handle */
  49         device_t        sc_dev;         /* hardware device struct */
  50         const struct radio_hw_if *hw_if; /* hardware interface */
  51         char            sc_dying;       /* device detached */
  52 };
  53
  54 static int      radioprobe(device_t, cfdata_t, void *);
  55 static void     radioattach(device_t, device_t, void *);
  56 static int      radioprint(void *, const char *);
  57 static int      radiodetach(device_t, int);
  58 static int      radioactivate(device_t, enum devact);
  59
  60 CFATTACH_DECL_NEW(radio, sizeof(struct radio_softc),
  61     radioprobe, radioattach, radiodetach, radioactivate);
  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         radioopen, radioclose, noread, nowrite, radioioctl,
  69         nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
  70 };
  71
  72 extern struct cfdriver radio_cd;
  73
  74 static int
  75 radioprobe(device_t parent, cfdata_t match, void *aux)
  76 {
  77         return (1);
  78 }
  79
  80 static void
  81 radioattach(device_t parent, device_t self, void *aux)
  82 {
  83         struct radio_softc *sc = (void *)self;
  84         struct radio_attach_args *sa = aux;
  85         const struct radio_hw_if *hwp = sa->hwif;
  86         void  *hdlp = sa->hdl;
  87
  88         aprint_naive("\n");
  89         aprint_normal("\n");
  90         sc->hw_if = hwp;
  91         sc->hw_hdl = hdlp;
  92         sc->sc_dev = parent;
  93 }
  94
  95 static int
  96 radioopen(dev_t dev, int flags, int fmt, struct lwp *l)
  97 {
  98         int     unit;
  99         struct radio_softc *sc;
 100
 101         unit = RADIOUNIT(dev);
 102         sc = device_lookup_private(&radio_cd, unit);
 103         if (sc == NULL || sc->hw_if == NULL)
 104                 return (ENXIO);
 105
 106         if (sc->hw_if->open != NULL)
 107                 return (sc->hw_if->open(sc->hw_hdl, flags, fmt, l->l_proc));
 108         else
 109                 return (0);
 110 }
 111
 112 static int
 113 radioclose(dev_t dev, int flags, int fmt, struct lwp *l)
 114 {
 115         struct radio_softc *sc;
 116
 117         sc = device_lookup_private(&radio_cd, RADIOUNIT(dev));
 118
 119         if (sc->hw_if->close != NULL)
 120                 return (sc->hw_if->close(sc->hw_hdl, flags, fmt, l->l_proc));
 121         else
 122                 return (0);
 123 }
 124
 125 static int
 126 radioioctl(dev_t dev, u_long cmd, void *data, int flags,
 127     struct lwp *l)
 128 {
 129         struct radio_softc *sc;
 130         int unit, error;
 131
 132         unit = RADIOUNIT(dev);
 133         sc = device_lookup_private(&radio_cd, unit);
 134         if (sc == NULL || sc->hw_if == NULL)
 135                 return (ENXIO);
 136
 137         error = EOPNOTSUPP;
 138         switch (cmd) {
 139         case RIOCGINFO:
 140                 if (sc->hw_if->get_info)
 141                         error = (sc->hw_if->get_info)(sc->hw_hdl,
 142                                         (struct radio_info *)data);
 143                         break;
 144         case RIOCSINFO:
 145                 if (sc->hw_if->set_info)
 146                         error = (sc->hw_if->set_info)(sc->hw_hdl,
 147                                 (struct radio_info *)data);
 148                 break;
 149         case RIOCSSRCH:
 150                 if (sc->hw_if->search)
 151                         error = (sc->hw_if->search)(sc->hw_hdl,
 152                                         *(int *)data);
 153                 break;
 154         default:
 155                 error = EINVAL;
 156         }
 157
 158         return (error);
 159 }
 160
 161 /*
 162  * Called from hardware driver. This is where the MI radio driver gets
 163  * probed/attached to the hardware driver
 164  */
 165 device_t
 166 radio_attach_mi(const struct radio_hw_if *rhwp, void *hdlp, device_t dev)
 167 {
 168         struct radio_attach_args arg;
 169
 170         arg.hwif = rhwp;
 171         arg.hdl = hdlp;
 172         return (config_found(dev, &arg, radioprint));
 173 }
 174
 175 static int
 176 radioprint(void *aux, const char *pnp)
 177 {
 178         if (pnp != NULL)
 179                 aprint_normal("radio at %s", pnp);
 180         return (UNCONF);
 181 }
 182
 183 static int
 184 radiodetach(device_t self, int flags)
 185 {
 186         /*struct radio_softc *sc = (struct radio_softc *)self;*/
 187         int maj, mn;
 188
 189         /* locate the major number */
 190         maj = cdevsw_lookup_major(&radio_cdevsw);
 191
 192         /* Nuke the vnodes for any open instances (calls close). */
 193         mn = device_unit(self);
 194         vdevgone(maj, mn, mn, VCHR);
 195
 196         return (0);
 197 }
 198
 199 static int
 200 radioactivate(device_t self, enum devact act)
 201 {
 202         struct radio_softc *sc = device_private(self);
 203
 204         switch (act) {
 205         case DVACT_ACTIVATE:
 206                 return (EOPNOTSUPP);
 207
 208         case DVACT_DEACTIVATE:
 209                 sc->sc_dying = 1;
 210                 break;
 211         }
 212         return (0);
 213 }