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PL286/system/bt/bta/sys/bta_sys_main.cc

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/******************************************************************************
*
* Copyright (C) 2003-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This is the main implementation file for the BTA system manager.
*
******************************************************************************/
#define LOG_TAG "bt_bta_sys_main"
#include <base/bind.h>
#include <base/logging.h>
#include <base/threading/thread.h>
#include <pthread.h>
#include <string.h>
#include "bt_common.h"
#include "bta_api.h"
#include "bta_sys.h"
#include "bta_sys_int.h"
#include "btm_api.h"
#include "btu.h"
#include "osi/include/alarm.h"
#include "osi/include/fixed_queue.h"
#include "osi/include/log.h"
#include "osi/include/osi.h"
#include "osi/include/thread.h"
#include "utl.h"
#if (defined BTA_AR_INCLUDED) && (BTA_AR_INCLUDED == true)
#include "bta_ar_api.h"
#endif
/* system manager control block definition */
tBTA_SYS_CB bta_sys_cb;
extern thread_t* bt_workqueue_thread;
/* trace level */
/* TODO Hard-coded trace levels - Needs to be configurable */
uint8_t appl_trace_level = BT_TRACE_LEVEL_WARNING; // APPL_INITIAL_TRACE_LEVEL;
uint8_t btif_trace_level = BT_TRACE_LEVEL_WARNING;
static const tBTA_SYS_REG bta_sys_hw_reg = {bta_sys_sm_execute, NULL};
/* type for action functions */
typedef void (*tBTA_SYS_ACTION)(tBTA_SYS_HW_MSG* p_data);
/* action function list */
const tBTA_SYS_ACTION bta_sys_action[] = {
/* device manager local device API events - cf bta_sys.h for events */
bta_sys_hw_api_enable, /* 0 BTA_SYS_HW_API_ENABLE_EVT */
bta_sys_hw_evt_enabled, /* 1 BTA_SYS_HW_EVT_ENABLED_EVT */
bta_sys_hw_evt_stack_enabled, /* 2 BTA_SYS_HW_EVT_STACK_ENABLED_EVT */
bta_sys_hw_api_disable, /* 3 BTA_SYS_HW_API_DISABLE_EVT */
bta_sys_hw_evt_disabled, /* 4 BTA_SYS_HW_EVT_DISABLED_EVT */
bta_sys_hw_error /* 5 BTA_SYS_HW_ERROR_EVT */
};
/* state machine action enumeration list */
enum {
/* device manager local device API events */
BTA_SYS_HW_API_ENABLE,
BTA_SYS_HW_EVT_ENABLED,
BTA_SYS_HW_EVT_STACK_ENABLED,
BTA_SYS_HW_API_DISABLE,
BTA_SYS_HW_EVT_DISABLED,
BTA_SYS_HW_ERROR
};
#define BTA_SYS_NUM_ACTIONS (BTA_SYS_MAX_EVT & 0x00ff)
#define BTA_SYS_IGNORE BTA_SYS_NUM_ACTIONS
/* state table information */
#define BTA_SYS_ACTIONS 2 /* number of actions */
#define BTA_SYS_NEXT_STATE 2 /* position of next state */
#define BTA_SYS_NUM_COLS 3 /* number of columns in state tables */
/* state table for OFF state */
const uint8_t bta_sys_hw_off[][BTA_SYS_NUM_COLS] = {
/* Event Action 1 Action 2
Next State */
/* API_ENABLE */ {BTA_SYS_HW_API_ENABLE, BTA_SYS_IGNORE,
BTA_SYS_HW_STARTING},
/* EVT_ENABLED */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE, BTA_SYS_HW_STARTING},
/* STACK_ENABLED */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE, BTA_SYS_HW_ON},
/* API_DISABLE */ {BTA_SYS_HW_EVT_DISABLED, BTA_SYS_IGNORE,
BTA_SYS_HW_OFF},
/* EVT_DISABLED */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE, BTA_SYS_HW_OFF},
/* EVT_ERROR */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE, BTA_SYS_HW_OFF}};
const uint8_t bta_sys_hw_starting[][BTA_SYS_NUM_COLS] = {
/* Event Action 1 Action 2
Next State */
/* API_ENABLE */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE,
BTA_SYS_HW_STARTING}, /* wait for completion event */
/* EVT_ENABLED */ {BTA_SYS_HW_EVT_ENABLED, BTA_SYS_IGNORE,
BTA_SYS_HW_STARTING},
/* STACK_ENABLED */ {BTA_SYS_HW_EVT_STACK_ENABLED, BTA_SYS_IGNORE,
BTA_SYS_HW_ON},
/* API_DISABLE */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE,
BTA_SYS_HW_STOPPING}, /* successive disable/enable:
change state wait for
completion to disable */
/* EVT_DISABLED */ {BTA_SYS_HW_EVT_DISABLED, BTA_SYS_HW_API_ENABLE,
BTA_SYS_HW_STARTING}, /* successive enable/disable:
notify, then restart HW */
/* EVT_ERROR */ {BTA_SYS_HW_ERROR, BTA_SYS_IGNORE, BTA_SYS_HW_ON}};
const uint8_t bta_sys_hw_on[][BTA_SYS_NUM_COLS] = {
/* Event Action 1 Action 2
Next State */
/* API_ENABLE */ {BTA_SYS_HW_API_ENABLE, BTA_SYS_IGNORE, BTA_SYS_HW_ON},
/* EVT_ENABLED */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE, BTA_SYS_HW_ON},
/* STACK_ENABLED */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE, BTA_SYS_HW_ON},
/* API_DISABLE */
{BTA_SYS_HW_API_DISABLE, BTA_SYS_IGNORE,
BTA_SYS_HW_ON}, /* don't change the state here, as some
other modules might be active */
/* EVT_DISABLED */ {BTA_SYS_HW_ERROR, BTA_SYS_IGNORE, BTA_SYS_HW_ON},
/* EVT_ERROR */ {BTA_SYS_HW_ERROR, BTA_SYS_IGNORE, BTA_SYS_HW_ON}};
const uint8_t bta_sys_hw_stopping[][BTA_SYS_NUM_COLS] = {
/* Event Action 1 Action 2
Next State */
/* API_ENABLE */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE,
BTA_SYS_HW_STARTING}, /* change state, and wait for
completion event to enable */
/* EVT_ENABLED */ {BTA_SYS_HW_EVT_ENABLED, BTA_SYS_IGNORE,
BTA_SYS_HW_STOPPING}, /* successive enable/disable:
finish the enable before
disabling */
/* STACK_ENABLED */ {BTA_SYS_HW_EVT_STACK_ENABLED, BTA_SYS_HW_API_DISABLE,
BTA_SYS_HW_STOPPING}, /* successive enable/disable:
notify, then stop */
/* API_DISABLE */ {BTA_SYS_IGNORE, BTA_SYS_IGNORE,
BTA_SYS_HW_STOPPING}, /* wait for completion event */
/* EVT_DISABLED */ {BTA_SYS_HW_EVT_DISABLED, BTA_SYS_IGNORE,
BTA_SYS_HW_OFF},
/* EVT_ERROR */ {BTA_SYS_HW_API_DISABLE, BTA_SYS_IGNORE,
BTA_SYS_HW_STOPPING}};
typedef const uint8_t (*tBTA_SYS_ST_TBL)[BTA_SYS_NUM_COLS];
/* state table */
const tBTA_SYS_ST_TBL bta_sys_st_tbl[] = {bta_sys_hw_off, bta_sys_hw_starting,
bta_sys_hw_on, bta_sys_hw_stopping};
/*******************************************************************************
*
* Function bta_sys_init
*
* Description BTA initialization; called from task initialization.
*
*
* Returns void
*
******************************************************************************/
void bta_sys_init(void) {
memset(&bta_sys_cb, 0, sizeof(tBTA_SYS_CB));
appl_trace_level = APPL_INITIAL_TRACE_LEVEL;
/* register BTA SYS message handler */
bta_sys_register(BTA_ID_SYS, &bta_sys_hw_reg);
/* register for BTM notifications */
BTM_RegisterForDeviceStatusNotif((tBTM_DEV_STATUS_CB*)&bta_sys_hw_btm_cback);
#if (defined BTA_AR_INCLUDED) && (BTA_AR_INCLUDED == true)
bta_ar_init();
#endif
}
void bta_sys_free(void) {
}
/*******************************************************************************
*
* Function bta_dm_sm_execute
*
* Description State machine event handling function for DM
*
*
* Returns void
*
******************************************************************************/
bool bta_sys_sm_execute(BT_HDR* p_msg) {
bool freebuf = true;
tBTA_SYS_ST_TBL state_table;
uint8_t action;
int i;
APPL_TRACE_EVENT("bta_sys_sm_execute state:%d, event:0x%x", bta_sys_cb.state,
p_msg->event);
/* look up the state table for the current state */
state_table = bta_sys_st_tbl[bta_sys_cb.state];
/* update state */
bta_sys_cb.state = state_table[p_msg->event & 0x00ff][BTA_SYS_NEXT_STATE];
/* execute action functions */
for (i = 0; i < BTA_SYS_ACTIONS; i++) {
action = state_table[p_msg->event & 0x00ff][i];
if (action != BTA_SYS_IGNORE) {
(*bta_sys_action[action])((tBTA_SYS_HW_MSG*)p_msg);
} else {
break;
}
}
return freebuf;
}
void bta_sys_hw_register(tBTA_SYS_HW_MODULE module, tBTA_SYS_HW_CBACK* cback) {
bta_sys_cb.sys_hw_cback[module] = cback;
}
void bta_sys_hw_unregister(tBTA_SYS_HW_MODULE module) {
bta_sys_cb.sys_hw_cback[module] = NULL;
}
/*******************************************************************************
*
* Function bta_sys_hw_btm_cback
*
* Description This function is registered by BTA SYS to BTM in order to get
* status notifications
*
*
* Returns
*
******************************************************************************/
void bta_sys_hw_btm_cback(tBTM_DEV_STATUS status) {
tBTA_SYS_HW_MSG* sys_event =
(tBTA_SYS_HW_MSG*)osi_malloc(sizeof(tBTA_SYS_HW_MSG));
APPL_TRACE_DEBUG("%s was called with parameter: %i", __func__, status);
/* send a message to BTA SYS */
if (status == BTM_DEV_STATUS_UP) {
sys_event->hdr.event = BTA_SYS_EVT_STACK_ENABLED_EVT;
} else if (status == BTM_DEV_STATUS_DOWN) {
sys_event->hdr.event = BTA_SYS_ERROR_EVT;
} else {
/* BTM_DEV_STATUS_CMD_TOUT is ignored for now. */
osi_free_and_reset((void**)&sys_event);
}
if (sys_event) bta_sys_sendmsg(sys_event);
}
/*******************************************************************************
*
* Function bta_sys_hw_error
*
* Description In case the HW device stops answering... Try to turn it off,
* then re-enable all
* previously active SW modules.
*
* Returns success or failure
*
******************************************************************************/
void bta_sys_hw_error(UNUSED_ATTR tBTA_SYS_HW_MSG* p_sys_hw_msg) {
uint8_t module_index;
APPL_TRACE_DEBUG("%s", __func__);
for (module_index = 0; module_index < BTA_SYS_MAX_HW_MODULES;
module_index++) {
if (bta_sys_cb.sys_hw_module_active & ((uint32_t)1 << module_index)) {
switch (module_index) {
case BTA_SYS_HW_BLUETOOTH:
/* Send BTA_SYS_HW_ERROR_EVT to DM */
if (bta_sys_cb.sys_hw_cback[module_index] != NULL)
bta_sys_cb.sys_hw_cback[module_index](BTA_SYS_HW_ERROR_EVT);
break;
default:
/* not yet supported */
break;
}
}
}
}
/*******************************************************************************
*
* Function bta_sys_hw_enable
*
* Description this function is called after API enable and HW has been
* turned on
*
*
* Returns success or failure
*
******************************************************************************/
void bta_sys_hw_api_enable(tBTA_SYS_HW_MSG* p_sys_hw_msg) {
if ((!bta_sys_cb.sys_hw_module_active) &&
(bta_sys_cb.state != BTA_SYS_HW_ON)) {
/* register which HW module was turned on */
bta_sys_cb.sys_hw_module_active |= ((uint32_t)1 << p_sys_hw_msg->hw_module);
tBTA_SYS_HW_MSG* p_msg =
(tBTA_SYS_HW_MSG*)osi_malloc(sizeof(tBTA_SYS_HW_MSG));
p_msg->hdr.event = BTA_SYS_EVT_ENABLED_EVT;
p_msg->hw_module = p_sys_hw_msg->hw_module;
bta_sys_sendmsg(p_msg);
} else {
/* register which HW module was turned on */
bta_sys_cb.sys_hw_module_active |= ((uint32_t)1 << p_sys_hw_msg->hw_module);
/* HW already in use, so directly notify the caller */
if (bta_sys_cb.sys_hw_cback[p_sys_hw_msg->hw_module] != NULL)
bta_sys_cb.sys_hw_cback[p_sys_hw_msg->hw_module](BTA_SYS_HW_ON_EVT);
}
APPL_TRACE_EVENT("bta_sys_hw_api_enable for %d, active modules 0x%04X",
p_sys_hw_msg->hw_module, bta_sys_cb.sys_hw_module_active);
}
/*******************************************************************************
*
* Function bta_sys_hw_disable
*
* Description if no other module is using the HW, this function will call
* (if defined) a user-macro to turn off the HW
*
*
* Returns success or failure
*
******************************************************************************/
void bta_sys_hw_api_disable(tBTA_SYS_HW_MSG* p_sys_hw_msg) {
APPL_TRACE_DEBUG("bta_sys_hw_api_disable for %d, active modules: 0x%04X",
p_sys_hw_msg->hw_module, bta_sys_cb.sys_hw_module_active);
/* make sure the related SW blocks were stopped */
bta_sys_disable(p_sys_hw_msg->hw_module);
/* register which module we turn off */
bta_sys_cb.sys_hw_module_active &= ~((uint32_t)1 << p_sys_hw_msg->hw_module);
/* if there are still some SW modules using the HW, just provide an answer to
* the calling */
if (bta_sys_cb.sys_hw_module_active != 0) {
/* if there are still some SW modules using the HW, directly notify the
* caller */
if (bta_sys_cb.sys_hw_cback[p_sys_hw_msg->hw_module] != NULL)
bta_sys_cb.sys_hw_cback[p_sys_hw_msg->hw_module](BTA_SYS_HW_OFF_EVT);
} else {
/* manually update the state of our system */
bta_sys_cb.state = BTA_SYS_HW_STOPPING;
tBTA_SYS_HW_MSG* p_msg =
(tBTA_SYS_HW_MSG*)osi_malloc(sizeof(tBTA_SYS_HW_MSG));
p_msg->hdr.event = BTA_SYS_EVT_DISABLED_EVT;
p_msg->hw_module = p_sys_hw_msg->hw_module;
bta_sys_sendmsg(p_msg);
}
}
/*******************************************************************************
*
* Function bta_sys_hw_event_enabled
*
* Description
*
*
* Returns success or failure
*
******************************************************************************/
void bta_sys_hw_evt_enabled(tBTA_SYS_HW_MSG* p_sys_hw_msg) {
APPL_TRACE_EVENT("bta_sys_hw_evt_enabled for %i", p_sys_hw_msg->hw_module);
BTM_DeviceReset(NULL);
}
/*******************************************************************************
*
* Function bta_sys_hw_event_disabled
*
* Description
*
*
* Returns success or failure
*
******************************************************************************/
void bta_sys_hw_evt_disabled(tBTA_SYS_HW_MSG* p_sys_hw_msg) {
uint8_t hw_module_index;
APPL_TRACE_DEBUG("bta_sys_hw_evt_disabled - module 0x%X",
p_sys_hw_msg->hw_module);
for (hw_module_index = 0; hw_module_index < BTA_SYS_MAX_HW_MODULES;
hw_module_index++) {
if (bta_sys_cb.sys_hw_cback[hw_module_index] != NULL)
bta_sys_cb.sys_hw_cback[hw_module_index](BTA_SYS_HW_OFF_EVT);
}
}
/*******************************************************************************
*
* Function bta_sys_hw_event_stack_enabled
*
* Description we receive this event once the SW side is ready (stack, FW
* download,... ), i.e. we can really start using the device. So
* notify the app.
*
* Returns success or failure
*
******************************************************************************/
void bta_sys_hw_evt_stack_enabled(UNUSED_ATTR tBTA_SYS_HW_MSG* p_sys_hw_msg) {
uint8_t hw_module_index;
APPL_TRACE_DEBUG(" bta_sys_hw_evt_stack_enabled!notify the callers");
for (hw_module_index = 0; hw_module_index < BTA_SYS_MAX_HW_MODULES;
hw_module_index++) {
if (bta_sys_cb.sys_hw_cback[hw_module_index] != NULL)
bta_sys_cb.sys_hw_cback[hw_module_index](BTA_SYS_HW_ON_EVT);
}
}
/*******************************************************************************
*
* Function bta_sys_event
*
* Description BTA event handler; called from task event handler.
*
*
* Returns void
*
******************************************************************************/
void bta_sys_event(BT_HDR* p_msg) {
uint8_t id;
bool freebuf = true;
APPL_TRACE_EVENT("%s: Event 0x%x", __func__, p_msg->event);
/* get subsystem id from event */
id = (uint8_t)(p_msg->event >> 8);
/* verify id and call subsystem event handler */
if ((id < BTA_ID_MAX) && (bta_sys_cb.reg[id] != NULL)) {
freebuf = (*bta_sys_cb.reg[id]->evt_hdlr)(p_msg);
} else {
APPL_TRACE_WARNING("%s: Received unregistered event id %d", __func__, id);
}
if (freebuf) {
osi_free(p_msg);
}
}
/*******************************************************************************
*
* Function bta_sys_register
*
* Description Called by other BTA subsystems to register their event
* handler.
*
*
* Returns void
*
******************************************************************************/
void bta_sys_register(uint8_t id, const tBTA_SYS_REG* p_reg) {
bta_sys_cb.reg[id] = (tBTA_SYS_REG*)p_reg;
bta_sys_cb.is_reg[id] = true;
}
/*******************************************************************************
*
* Function bta_sys_deregister
*
* Description Called by other BTA subsystems to de-register
* handler.
*
*
* Returns void
*
******************************************************************************/
void bta_sys_deregister(uint8_t id) { bta_sys_cb.is_reg[id] = false; }
/*******************************************************************************
*
* Function bta_sys_is_register
*
* Description Called by other BTA subsystems to get registeration
* status.
*
*
* Returns void
*
******************************************************************************/
bool bta_sys_is_register(uint8_t id) { return bta_sys_cb.is_reg[id]; }
/*******************************************************************************
*
* Function bta_sys_sendmsg
*
* Description Send a GKI message to BTA. This function is designed to
* optimize sending of messages to BTA. It is called by BTA
* API functions and call-in functions.
*
* TODO (apanicke): Add location object as parameter for easier
* future debugging when doing alarm refactor
*
*
* Returns void
*
******************************************************************************/
void bta_sys_sendmsg(void* p_msg) {
base::MessageLoop* bta_message_loop = get_message_loop();
if (!bta_message_loop || !bta_message_loop->task_runner().get()) {
APPL_TRACE_ERROR("%s: MessageLooper not initialized", __func__);
return;
}
bta_message_loop->task_runner()->PostTask(
FROM_HERE, base::Bind(&bta_sys_event, static_cast<BT_HDR*>(p_msg)));
}
/*******************************************************************************
*
* Function do_in_bta_thread
*
* Description Post a closure to be ran in the bta thread
*
* Returns void
*
******************************************************************************/
void do_in_bta_thread(const tracked_objects::Location& from_here,
const base::Closure& task) {
base::MessageLoop* bta_message_loop = get_message_loop();
if (!bta_message_loop || !bta_message_loop->task_runner().get()) {
APPL_TRACE_ERROR("%s: MessageLooper not initialized", __func__);
return;
}
bta_message_loop->task_runner()->PostTask(from_here, task);
}
/*******************************************************************************
*
* Function bta_sys_start_timer
*
* Description Start a protocol timer for the specified amount
* of time in milliseconds.
*
* Returns void
*
******************************************************************************/
void bta_sys_start_timer(alarm_t* alarm, period_ms_t interval, uint16_t event,
uint16_t layer_specific) {
BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
p_buf->event = event;
p_buf->layer_specific = layer_specific;
alarm_set_on_mloop(alarm, interval, bta_sys_sendmsg, p_buf);
}
/*******************************************************************************
*
* Function bta_sys_disable
*
* Description For each registered subsystem execute its disable function.
*
* Returns void
*
******************************************************************************/
void bta_sys_disable(tBTA_SYS_HW_MODULE module) {
int bta_id = 0;
int bta_id_max = 0;
APPL_TRACE_DEBUG("bta_sys_disable: module %i", module);
switch (module) {
case BTA_SYS_HW_BLUETOOTH:
bta_id = BTA_ID_DM;
bta_id_max = BTA_ID_BLUETOOTH_MAX;
break;
default:
APPL_TRACE_WARNING("bta_sys_disable: unkown module");
return;
}
for (; bta_id <= bta_id_max; bta_id++) {
if (bta_sys_cb.reg[bta_id] != NULL) {
if (bta_sys_cb.is_reg[bta_id] == true &&
bta_sys_cb.reg[bta_id]->disable != NULL) {
(*bta_sys_cb.reg[bta_id]->disable)();
}
}
}
}
/*******************************************************************************
*
* Function bta_sys_set_trace_level
*
* Description Set trace level for BTA
*
* Returns void
*
******************************************************************************/
void bta_sys_set_trace_level(uint8_t level) { appl_trace_level = level; }
/*******************************************************************************
*
* Function bta_sys_get_sys_features
*
* Description Returns sys_features to other BTA modules.
*
* Returns sys_features
*
******************************************************************************/
uint16_t bta_sys_get_sys_features(void) { return bta_sys_cb.sys_features; }