1 /******************************************************************************
2 *
3 * Copyright 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 ******************************************************************************/
80 static const hci_t* hci;
81
82 /*******************************************************************************
83 * Externs
84 ******************************************************************************/
85 extern 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 *****************************************************************************/
post_to_hci_message_loop(const tracked_objects::Location & from_here,BT_HDR * p_msg)100 void 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 *****************************************************************************/
bte_main_boot_entry(void)122 void 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 *****************************************************************************/
bte_main_cleanup()145 void 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 *****************************************************************************/
bte_main_enable()161 void 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 *****************************************************************************/
bte_main_disable(void)180 void 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 *****************************************************************************/
bte_main_postload_cfg(void)198 void 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 *****************************************************************************/
bte_main_hci_send(BT_HDR * p_msg,uint16_t event)214 void 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