hw/bt/core.c

   1 /*
   2  * Convenience functions for bluetooth.
   3  *
   4  * Copyright (C) 2008 Andrzej Zaborowski  <balrog@zabor.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 or
   9  * (at your option) version 3 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "qemu/error-report.h"
  22 #include "qemu-common.h"
  23 #include "sysemu/bt.h"
  24 #include "hw/bt.h"
  25
  26 /* Slave implementations can ignore this */
  27 static void bt_dummy_lmp_mode_change(struct bt_link_s *link)
  28 {
  29 }
  30
  31 /* Slaves should never receive these PDUs */
  32 static void bt_dummy_lmp_connection_complete(struct bt_link_s *link)
  33 {
  34     if (link->slave->reject_reason)
  35         error_report("%s: stray LMP_not_accepted received, fixme", __func__);
  36     else
  37         error_report("%s: stray LMP_accepted received, fixme", __func__);
  38     exit(-1);
  39 }
  40
  41 static void bt_dummy_lmp_disconnect_master(struct bt_link_s *link)
  42 {
  43     error_report("%s: stray LMP_detach received, fixme", __func__);
  44     exit(-1);
  45 }
  46
  47 static void bt_dummy_lmp_acl_resp(struct bt_link_s *link,
  48                 const uint8_t *data, int start, int len)
  49 {
  50     error_report("%s: stray ACL response PDU, fixme", __func__);
  51     exit(-1);
  52 }
  53
  54 /* Slaves that don't hold any additional per link state can use these */
  55 static void bt_dummy_lmp_connection_request(struct bt_link_s *req)
  56 {
  57     struct bt_link_s *link = g_malloc0(sizeof(struct bt_link_s));
  58
  59     link->slave = req->slave;
  60     link->host = req->host;
  61
  62     req->host->reject_reason = 0;
  63     req->host->lmp_connection_complete(link);
  64 }
  65
  66 static void bt_dummy_lmp_disconnect_slave(struct bt_link_s *link)
  67 {
  68     g_free(link);
  69 }
  70
  71 static void bt_dummy_destroy(struct bt_device_s *device)
  72 {
  73     bt_device_done(device);
  74     g_free(device);
  75 }
  76
  77 static int bt_dev_idx = 0;
  78
  79 void bt_device_init(struct bt_device_s *dev, struct bt_scatternet_s *net)
  80 {
  81     memset(dev, 0, sizeof(*dev));
  82     dev->inquiry_scan = 1;
  83     dev->page_scan = 1;
  84
  85     dev->bd_addr.b[0] = bt_dev_idx & 0xff;
  86     dev->bd_addr.b[1] = bt_dev_idx >> 8;
  87     dev->bd_addr.b[2] = 0xd0;
  88     dev->bd_addr.b[3] = 0xba;
  89     dev->bd_addr.b[4] = 0xbe;
  90     dev->bd_addr.b[5] = 0xba;
  91     bt_dev_idx ++;
  92
  93     /* Simple slave-only devices need to implement only .lmp_acl_data */
  94     dev->lmp_connection_complete = bt_dummy_lmp_connection_complete;
  95     dev->lmp_disconnect_master = bt_dummy_lmp_disconnect_master;
  96     dev->lmp_acl_resp = bt_dummy_lmp_acl_resp;
  97     dev->lmp_mode_change = bt_dummy_lmp_mode_change;
  98     dev->lmp_connection_request = bt_dummy_lmp_connection_request;
  99     dev->lmp_disconnect_slave = bt_dummy_lmp_disconnect_slave;
 100
 101     dev->handle_destroy = bt_dummy_destroy;
 102
 103     dev->net = net;
 104     dev->next = net->slave;
 105     net->slave = dev;
 106 }
 107
 108 void bt_device_done(struct bt_device_s *dev)
 109 {
 110     struct bt_device_s **p = &dev->net->slave;
 111
 112     while (*p && *p != dev)
 113         p = &(*p)->next;
 114     if (*p != dev) {
 115         error_report("%s: bad bt device \"%s\"", __func__,
 116                      dev->lmp_name ?: "(null)");
 117         exit(-1);
 118     }
 119
 120     *p = dev->next;
 121 }
 122
 123 static struct bt_vlan_s {
 124     struct bt_scatternet_s net;
 125     int id;
 126     struct bt_vlan_s *next;
 127 } *first_bt_vlan;
 128
 129 /* find or alloc a new bluetooth "VLAN" */
 130 struct bt_scatternet_s *qemu_find_bt_vlan(int id)
 131 {
 132     struct bt_vlan_s **pvlan, *vlan;
 133     for (vlan = first_bt_vlan; vlan != NULL; vlan = vlan->next) {
 134         if (vlan->id == id)
 135             return &vlan->net;
 136     }
 137     vlan = g_malloc0(sizeof(struct bt_vlan_s));
 138     vlan->id = id;
 139     pvlan = &first_bt_vlan;
 140     while (*pvlan != NULL)
 141         pvlan = &(*pvlan)->next;
 142     *pvlan = vlan;
 143     return &vlan->net;
 144 }