LXR qemu/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 "sysemu/bt.h"
  23#include "hw/bt.h"
  24
  25/* Slave implementations can ignore this */
  26static void bt_dummy_lmp_mode_change(struct bt_link_s *link)
  27{
  28}
  29
  30/* Slaves should never receive these PDUs */
  31static void bt_dummy_lmp_connection_complete(struct bt_link_s *link)
  32{
  33    if (link->slave->reject_reason)
  34        error_report("%s: stray LMP_not_accepted received, fixme", __func__);
  35    else
  36        error_report("%s: stray LMP_accepted received, fixme", __func__);
  37    exit(-1);
  38}
  39
  40static void bt_dummy_lmp_disconnect_master(struct bt_link_s *link)
  41{
  42    error_report("%s: stray LMP_detach received, fixme", __func__);
  43    exit(-1);
  44}
  45
  46static void bt_dummy_lmp_acl_resp(struct bt_link_s *link,
  47                const uint8_t *data, int start, int len)
  48{
  49    error_report("%s: stray ACL response PDU, fixme", __func__);
  50    exit(-1);
  51}
  52
  53/* Slaves that don't hold any additional per link state can use these */
  54static void bt_dummy_lmp_connection_request(struct bt_link_s *req)
  55{
  56    struct bt_link_s *link = g_malloc0(sizeof(struct bt_link_s));
  57
  58    link->slave = req->slave;
  59    link->host = req->host;
  60
  61    req->host->reject_reason = 0;
  62    req->host->lmp_connection_complete(link);
  63}
  64
  65static void bt_dummy_lmp_disconnect_slave(struct bt_link_s *link)
  66{
  67    g_free(link);
  68}
  69
  70static void bt_dummy_destroy(struct bt_device_s *device)
  71{
  72    bt_device_done(device);
  73    g_free(device);
  74}
  75
  76static int bt_dev_idx = 0;
  77
  78void bt_device_init(struct bt_device_s *dev, struct bt_scatternet_s *net)
  79{
  80    memset(dev, 0, sizeof(*dev));
  81    dev->inquiry_scan = 1;
  82    dev->page_scan = 1;
  83
  84    dev->bd_addr.b[0] = bt_dev_idx & 0xff;
  85    dev->bd_addr.b[1] = bt_dev_idx >> 8;
  86    dev->bd_addr.b[2] = 0xd0;
  87    dev->bd_addr.b[3] = 0xba;
  88    dev->bd_addr.b[4] = 0xbe;
  89    dev->bd_addr.b[5] = 0xba;
  90    bt_dev_idx ++;
  91
  92    /* Simple slave-only devices need to implement only .lmp_acl_data */
  93    dev->lmp_connection_complete = bt_dummy_lmp_connection_complete;
  94    dev->lmp_disconnect_master = bt_dummy_lmp_disconnect_master;
  95    dev->lmp_acl_resp = bt_dummy_lmp_acl_resp;
  96    dev->lmp_mode_change = bt_dummy_lmp_mode_change;
  97    dev->lmp_connection_request = bt_dummy_lmp_connection_request;
  98    dev->lmp_disconnect_slave = bt_dummy_lmp_disconnect_slave;
  99
 100    dev->handle_destroy = bt_dummy_destroy;
 101
 102    dev->net = net;
 103    dev->next = net->slave;
 104    net->slave = dev;
 105}
 106
 107void bt_device_done(struct bt_device_s *dev)
 108{
 109    struct bt_device_s **p = &dev->net->slave;
 110
 111    while (*p && *p != dev)
 112        p = &(*p)->next;
 113    if (*p != dev) {
 114        error_report("%s: bad bt device \"%s\"", __func__,
 115                     dev->lmp_name ?: "(null)");
 116        exit(-1);
 117    }
 118
 119    *p = dev->next;
 120}
 121
 122static struct bt_vlan_s {
 123    struct bt_scatternet_s net;
 124    int id;
 125    struct bt_vlan_s *next;
 126} *first_bt_vlan;
 127
 128/* find or alloc a new bluetooth "VLAN" */
 129struct bt_scatternet_s *qemu_find_bt_vlan(int id)
 130{
 131    struct bt_vlan_s **pvlan, *vlan;
 132    for (vlan = first_bt_vlan; vlan != NULL; vlan = vlan->next) {
 133        if (vlan->id == id)
 134            return &vlan->net;
 135    }
 136    vlan = g_malloc0(sizeof(struct bt_vlan_s));
 137    vlan->id = id;
 138    pvlan = &first_bt_vlan;
 139    while (*pvlan != NULL)
 140        pvlan = &(*pvlan)->next;
 141    *pvlan = vlan;
 142    return &vlan->net;
 143}
 144