sys/dev/bluetooth/bthub.c

   1 /*      $NetBSD: bthub.c,v 1.14 2008/06/12 21:47:11 cegger Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2006 Itronix Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Iain Hibbert for Itronix Inc.
   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  * 3. The name of Itronix Inc. may not be used to endorse
  18  *    or promote products derived from this software without specific
  19  *    prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
  25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28  * ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: bthub.c,v 1.14 2008/06/12 21:47:11 cegger Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/conf.h>
  39 #include <sys/device.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/kernel.h>
  42 #include <sys/queue.h>
  43 #include <sys/malloc.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/proc.h>
  46 #include <sys/systm.h>
  47
  48 #include <prop/proplib.h>
  49
  50 #include <netbt/bluetooth.h>
  51
  52 #include <dev/bluetooth/btdev.h>
  53
  54 #include "ioconf.h"
  55
  56 /*****************************************************************************
  57  *
  58  *      Bluetooth Device Hub
  59  */
  60
  61 /* autoconf(9) glue */
  62 static int      bthub_match(device_t, cfdata_t, void *);
  63 static void     bthub_attach(device_t, device_t, void *);
  64 static int      bthub_detach(device_t, int);
  65
  66 CFATTACH_DECL_NEW(bthub, 0,
  67     bthub_match, bthub_attach, bthub_detach, NULL);
  68
  69 /* control file */
  70 dev_type_ioctl(bthubioctl);
  71
  72 const struct cdevsw bthub_cdevsw = {
  73         nullopen, nullclose, noread, nowrite, bthubioctl,
  74         nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
  75 };
  76
  77 /* bthub functions */
  78 static int      bthub_print(void *, const char *);
  79 static int      bthub_pioctl(dev_t, unsigned long, prop_dictionary_t, int, struct lwp *);
  80
  81 /*****************************************************************************
  82  *
  83  *      bthub autoconf(9) routines
  84  *
  85  *      A Hub is attached to each Bluetooth Controller as it is enabled
  86  */
  87
  88 static int
  89 bthub_match(device_t self, cfdata_t cfdata, void *arg)
  90 {
  91
  92         return 1;
  93 }
  94
  95 static void
  96 bthub_attach(device_t parent, device_t self, void *aux)
  97 {
  98         bdaddr_t *addr = aux;
  99         prop_dictionary_t dict;
 100         prop_object_t obj;
 101
 102         dict = device_properties(self);
 103         obj = prop_data_create_data(addr, sizeof(*addr));
 104         prop_dictionary_set(dict, BTDEVladdr, obj);
 105         prop_object_release(obj);
 106
 107         aprint_verbose(" %s %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 108                         BTDEVladdr,
 109                         addr->b[5], addr->b[4], addr->b[3],
 110                         addr->b[2], addr->b[1], addr->b[0]);
 111
 112         aprint_normal("\n");
 113 }
 114
 115 static int
 116 bthub_detach(device_t self, int flags)
 117 {
 118
 119         return config_detach_children(self, flags);
 120 }
 121
 122 /*****************************************************************************
 123  *
 124  *      bthub access functions to control device
 125  */
 126
 127 int
 128 bthubioctl(dev_t devno, unsigned long cmd, void *data, int flag, struct lwp *l)
 129 {
 130         prop_dictionary_t dict;
 131         int err;
 132
 133         switch(cmd) {
 134         case BTDEV_ATTACH:
 135         case BTDEV_DETACH:
 136                 /* load dictionary */
 137                 err = prop_dictionary_copyin_ioctl(data, cmd, &dict);
 138                 if (err == 0) {
 139                         err = bthub_pioctl(devno, cmd, dict, flag, l);
 140                         prop_object_release(dict);
 141                 }
 142                 break;
 143
 144         default:
 145                 err = EPASSTHROUGH;
 146                 break;
 147         }
 148
 149         return err;
 150 }
 151
 152 static int
 153 bthub_pioctl(dev_t devno, unsigned long cmd, prop_dictionary_t dict,
 154     int flag, struct lwp *l)
 155 {
 156         prop_data_t laddr, raddr;
 157         prop_string_t service;
 158         prop_dictionary_t prop;
 159         prop_object_t obj;
 160         device_t dev, self;
 161         deviter_t di;
 162         int unit;
 163
 164         /* validate local address */
 165         laddr = prop_dictionary_get(dict, BTDEVladdr);
 166         if (prop_data_size(laddr) != sizeof(bdaddr_t))
 167                 return EINVAL;
 168
 169         /* locate the relevant bthub */
 170         for (unit = 0 ; ; unit++) {
 171                 if (unit == bthub_cd.cd_ndevs)
 172                         return ENXIO;
 173
 174                 self = device_lookup(&bthub_cd, unit);
 175                 if (self == NULL)
 176                         continue;
 177
 178                 prop = device_properties(self);
 179                 obj = prop_dictionary_get(prop, BTDEVladdr);
 180                 if (prop_data_equals(laddr, obj))
 181                         break;
 182         }
 183
 184         /* validate remote address */
 185         raddr = prop_dictionary_get(dict, BTDEVraddr);
 186         if (prop_data_size(raddr) != sizeof(bdaddr_t)
 187             || bdaddr_any(prop_data_data_nocopy(raddr)))
 188                 return EINVAL;
 189
 190         /* validate service name */
 191         service = prop_dictionary_get(dict, BTDEVservice);
 192         if (prop_object_type(service) != PROP_TYPE_STRING)
 193                 return EINVAL;
 194
 195         /* locate matching child device, if any */
 196         deviter_init(&di, 0);
 197         while ((dev = deviter_next(&di)) != NULL) {
 198                 if (device_parent(dev) != self)
 199                         continue;
 200
 201                 prop = device_properties(dev);
 202
 203                 obj = prop_dictionary_get(prop, BTDEVraddr);
 204                 if (!prop_object_equals(raddr, obj))
 205                         continue;
 206
 207                 obj = prop_dictionary_get(prop, BTDEVservice);
 208                 if (!prop_object_equals(service, obj))
 209                         continue;
 210
 211                 break;
 212         }
 213         deviter_release(&di);
 214
 215         switch (cmd) {
 216         case BTDEV_ATTACH:      /* attach BTDEV */
 217                 if (dev != NULL)
 218                         return EADDRINUSE;
 219
 220                 dev = config_found(self, dict, bthub_print);
 221                 if (dev == NULL)
 222                         return ENXIO;
 223
 224                 prop = device_properties(dev);
 225                 prop_dictionary_set(prop, BTDEVladdr, laddr);
 226                 prop_dictionary_set(prop, BTDEVraddr, raddr);
 227                 prop_dictionary_set(prop, BTDEVservice, service);
 228                 break;
 229
 230         case BTDEV_DETACH:      /* detach BTDEV */
 231                 if (dev == NULL)
 232                         return ENXIO;
 233
 234                 config_detach(dev, DETACH_FORCE);
 235                 break;
 236         }
 237
 238         return 0;
 239 }
 240
 241 static int
 242 bthub_print(void *aux, const char *pnp)
 243 {
 244         prop_dictionary_t dict = aux;
 245         prop_object_t obj;
 246         const bdaddr_t *raddr;
 247
 248         if (pnp != NULL) {
 249                 obj = prop_dictionary_get(dict, BTDEVtype);
 250                 aprint_normal("%s: %s '%s',", pnp, BTDEVtype,
 251                                         prop_string_cstring_nocopy(obj));
 252         }
 253
 254         obj = prop_dictionary_get(dict, BTDEVraddr);
 255         raddr = prop_data_data_nocopy(obj);
 256
 257         aprint_verbose(" %s %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 258                         BTDEVraddr,
 259                         raddr->b[5], raddr->b[4], raddr->b[3],
 260                         raddr->b[2], raddr->b[1], raddr->b[0]);
 261
 262         return UNCONF;
 263 }