1/******************************************************************************
2 *
3 *  Copyright (C) 2009-2012 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19/******************************************************************************
20 *
21 *  Filename:      bte_main.cc
22 *
23 *  Description:   Contains BTE core stack initialization and shutdown code
24 *
25 ******************************************************************************/
26
27#define LOG_TAG "bt_main"
28
29#include <base/logging.h>
30#include <base/threading/thread.h>
31#include <fcntl.h>
32#include <pthread.h>
33#include <signal.h>
34#include <stdlib.h>
35#include <time.h>
36
37#include <hardware/bluetooth.h>
38
39#include "bt_common.h"
40#include "bt_hci_bdroid.h"
41#include "bt_utils.h"
42#include "bta_api.h"
43#include "btcore/include/module.h"
44#include "bte.h"
45#include "btif_common.h"
46#include "btsnoop.h"
47#include "btu.h"
48#include "device/include/interop.h"
49#include "hci_layer.h"
50#include "hcimsgs.h"
51#include "osi/include/alarm.h"
52#include "osi/include/fixed_queue.h"
53#include "osi/include/future.h"
54#include "osi/include/log.h"
55#include "osi/include/osi.h"
56#include "osi/include/thread.h"
57#include "stack_config.h"
58
59/*******************************************************************************
60 *  Constants & Macros
61 ******************************************************************************/
62
63/* Run-time configuration file for BLE*/
64#ifndef BTE_BLE_STACK_CONF_FILE
65// TODO(armansito): Find a better way than searching by a hardcoded path.
66#if defined(OS_GENERIC)
67#define BTE_BLE_STACK_CONF_FILE "ble_stack.conf"
68#else  // !defined(OS_GENERIC)
69#define BTE_BLE_STACK_CONF_FILE "/etc/bluetooth/ble_stack.conf"
70#endif  // defined(OS_GENERIC)
71#endif  // BT_BLE_STACK_CONF_FILE
72
73/******************************************************************************
74 *  Variables
75 *****************************************************************************/
76
77/*******************************************************************************
78 *  Static variables
79 ******************************************************************************/
80static const hci_t* hci;
81
82/*******************************************************************************
83 *  Externs
84 ******************************************************************************/
85extern void btu_hci_msg_process(BT_HDR* p_msg);
86
87/*******************************************************************************
88 *  Static functions
89 ******************************************************************************/
90
91/******************************************************************************
92 *
93 * Function         post_to_hci_message_loop
94 *
95 * Description      Post an HCI event to the hci message queue
96 *
97 * Returns          None
98 *
99 *****************************************************************************/
100void post_to_hci_message_loop(const tracked_objects::Location& from_here,
101                              BT_HDR* p_msg) {
102  base::MessageLoop* hci_message_loop = get_message_loop();
103  if (!hci_message_loop || !hci_message_loop->task_runner().get()) {
104    LOG_ERROR(LOG_TAG, "%s: HCI message loop not running, accessed from %s",
105              __func__, from_here.ToString().c_str());
106    return;
107  }
108
109  hci_message_loop->task_runner()->PostTask(
110      from_here, base::Bind(&btu_hci_msg_process, p_msg));
111}
112
113/******************************************************************************
114 *
115 * Function         bte_main_boot_entry
116 *
117 * Description      BTE MAIN API - Entry point for BTE chip/stack initialization
118 *
119 * Returns          None
120 *
121 *****************************************************************************/
122void bte_main_boot_entry(void) {
123  module_init(get_module(INTEROP_MODULE));
124
125  hci = hci_layer_get_interface();
126  if (!hci) {
127    LOG_ERROR(LOG_TAG, "%s could not get hci layer interface.", __func__);
128    return;
129  }
130
131  hci->set_data_cb(base::Bind(&post_to_hci_message_loop));
132
133  module_init(get_module(STACK_CONFIG_MODULE));
134}
135
136/******************************************************************************
137 *
138 * Function         bte_main_cleanup
139 *
140 * Description      BTE MAIN API - Cleanup code for BTE chip/stack
141 *
142 * Returns          None
143 *
144 *****************************************************************************/
145void bte_main_cleanup() {
146  module_clean_up(get_module(STACK_CONFIG_MODULE));
147
148  module_clean_up(get_module(INTEROP_MODULE));
149}
150
151/******************************************************************************
152 *
153 * Function         bte_main_enable
154 *
155 * Description      BTE MAIN API - Creates all the BTE tasks. Should be called
156 *                  part of the Bluetooth stack enable sequence
157 *
158 * Returns          None
159 *
160 *****************************************************************************/
161void bte_main_enable() {
162  APPL_TRACE_DEBUG("%s", __func__);
163
164  module_start_up(get_module(BTSNOOP_MODULE));
165  module_start_up(get_module(HCI_MODULE));
166
167  BTU_StartUp();
168}
169
170/******************************************************************************
171 *
172 * Function         bte_main_disable
173 *
174 * Description      BTE MAIN API - Destroys all the BTE tasks. Should be called
175 *                  part of the Bluetooth stack disable sequence
176 *
177 * Returns          None
178 *
179 *****************************************************************************/
180void bte_main_disable(void) {
181  APPL_TRACE_DEBUG("%s", __func__);
182
183  module_shut_down(get_module(HCI_MODULE));
184  module_shut_down(get_module(BTSNOOP_MODULE));
185
186  BTU_ShutDown();
187}
188
189/******************************************************************************
190 *
191 * Function         bte_main_postload_cfg
192 *
193 * Description      BTE MAIN API - Stack postload configuration
194 *
195 * Returns          None
196 *
197 *****************************************************************************/
198void bte_main_postload_cfg(void) {
199  // TODO(eisenbach): [HIDL] DEPRECATE?
200}
201
202/******************************************************************************
203 *
204 * Function         bte_main_hci_send
205 *
206 * Description      BTE MAIN API - This function is called by the upper stack to
207 *                  send an HCI message. The function displays a protocol trace
208 *                  message (if enabled), and then calls the 'transmit' function
209 *                  associated with the currently selected HCI transport
210 *
211 * Returns          None
212 *
213 *****************************************************************************/
214void bte_main_hci_send(BT_HDR* p_msg, uint16_t event) {
215  uint16_t sub_event = event & BT_SUB_EVT_MASK; /* local controller ID */
216
217  p_msg->event = event;
218
219  if ((sub_event == LOCAL_BR_EDR_CONTROLLER_ID) ||
220      (sub_event == LOCAL_BLE_CONTROLLER_ID)) {
221    hci->transmit_downward(event, p_msg);
222  } else {
223    APPL_TRACE_ERROR("Invalid Controller ID. Discarding message.");
224    osi_free(p_msg);
225  }
226}
227