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/******************************************************************************
*
* Copyright 2016 The Android Open Source Project
* Copyright 2005-2012 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 file contains the HID host main functions and state machine.
*
******************************************************************************/
#include <cstdint>
// BTA_HD_INCLUDED
#include "bt_target.h" // Must be first to define build configuration
#if defined(BTA_HD_INCLUDED) && (BTA_HD_INCLUDED == TRUE)
#include "bta/hd/bta_hd_int.h"
#include "stack/include/bt_hdr.h"
/*****************************************************************************
* Constants and types
****************************************************************************/
/* state machine states */
enum {
BTA_HD_INIT_ST,
BTA_HD_IDLE_ST, /* not connected, waiting for connection */
BTA_HD_CONN_ST, /* host connected */
BTA_HD_TRANSIENT_TO_INIT_ST, /* transient state: going back from CONN to INIT
*/
};
typedef uint8_t tBTA_HD_STATE;
/*****************************************************************************
* Global data
****************************************************************************/
tBTA_HD_CB bta_hd_cb;
static tBTA_HD_STATE get_state() { return bta_hd_cb.state; }
static void set_state(tBTA_HD_STATE state) { bta_hd_cb.state = state; }
static void bta_hd_better_state_machine(uint16_t event, tBTA_HD_DATA* p_data) {
switch (get_state()) {
case BTA_HD_INIT_ST:
switch (event) {
case BTA_HD_API_REGISTER_APP_EVT:
set_state(BTA_HD_IDLE_ST);
bta_hd_register_act(p_data);
break;
case BTA_HD_API_ADD_DEVICE_EVT:
bta_hd_add_device_act(p_data);
break;
case BTA_HD_API_REMOVE_DEVICE_EVT:
bta_hd_remove_device_act(p_data);
break;
}
break;
case BTA_HD_IDLE_ST:
switch (event) {
case BTA_HD_API_UNREGISTER_APP_EVT:
set_state(BTA_HD_INIT_ST);
bta_hd_unregister_act();
break;
case BTA_HD_API_CONNECT_EVT:
bta_hd_connect_act(p_data);
break;
case BTA_HD_API_DISCONNECT_EVT:
bta_hd_disconnect_act();
break;
case BTA_HD_API_ADD_DEVICE_EVT:
bta_hd_add_device_act(p_data);
break;
case BTA_HD_API_REMOVE_DEVICE_EVT:
bta_hd_remove_device_act(p_data);
break;
case BTA_HD_API_SEND_REPORT_EVT:
bta_hd_send_report_act(p_data);
break;
case BTA_HD_INT_OPEN_EVT:
set_state(BTA_HD_CONN_ST);
bta_hd_open_act(p_data);
break;
case BTA_HD_INT_CLOSE_EVT:
bta_hd_close_act(p_data);
break;
}
break;
case BTA_HD_CONN_ST:
switch (event) {
case BTA_HD_API_UNREGISTER_APP_EVT:
set_state(BTA_HD_TRANSIENT_TO_INIT_ST);
bta_hd_disconnect_act();
break;
case BTA_HD_API_DISCONNECT_EVT:
bta_hd_disconnect_act();
break;
case BTA_HD_API_ADD_DEVICE_EVT:
bta_hd_add_device_act(p_data);
break;
case BTA_HD_API_REMOVE_DEVICE_EVT:
bta_hd_remove_device_act(p_data);
break;
case BTA_HD_API_SEND_REPORT_EVT:
bta_hd_send_report_act(p_data);
break;
case BTA_HD_API_REPORT_ERROR_EVT:
bta_hd_report_error_act(p_data);
break;
case BTA_HD_API_VC_UNPLUG_EVT:
bta_hd_vc_unplug_act();
break;
case BTA_HD_INT_CLOSE_EVT:
set_state(BTA_HD_IDLE_ST);
bta_hd_close_act(p_data);
break;
case BTA_HD_INT_INTR_DATA_EVT:
bta_hd_intr_data_act(p_data);
break;
case BTA_HD_INT_GET_REPORT_EVT:
bta_hd_get_report_act(p_data);
break;
case BTA_HD_INT_SET_REPORT_EVT:
bta_hd_set_report_act(p_data);
break;
case BTA_HD_INT_SET_PROTOCOL_EVT:
bta_hd_set_protocol_act(p_data);
break;
case BTA_HD_INT_VC_UNPLUG_EVT:
set_state(BTA_HD_IDLE_ST);
bta_hd_vc_unplug_done_act(p_data);
break;
case BTA_HD_INT_SUSPEND_EVT:
bta_hd_suspend_act(p_data);
break;
case BTA_HD_INT_EXIT_SUSPEND_EVT:
bta_hd_exit_suspend_act(p_data);
break;
}
break;
case BTA_HD_TRANSIENT_TO_INIT_ST:
switch (event) {
case BTA_HD_INT_CLOSE_EVT:
set_state(BTA_HD_INIT_ST);
bta_hd_unregister2_act(p_data);
break;
case BTA_HD_INT_VC_UNPLUG_EVT:
set_state(BTA_HD_INIT_ST);
bta_hd_unregister2_act(p_data);
break;
}
break;
}
}
/*******************************************************************************
*
* Function bta_hd_hdl_event
*
* Description HID device main event handling function.
*
* Returns void
*
******************************************************************************/
bool bta_hd_hdl_event(BT_HDR_RIGID* p_msg) {
APPL_TRACE_API("%s: p_msg->event=%d", __func__, p_msg->event);
switch (p_msg->event) {
case BTA_HD_API_ENABLE_EVT:
bta_hd_api_enable((tBTA_HD_DATA*)p_msg);
break;
case BTA_HD_API_DISABLE_EVT:
if (bta_hd_cb.state == BTA_HD_CONN_ST) {
APPL_TRACE_WARNING("%s: host connected, disconnect before disabling",
__func__);
// unregister (and disconnect)
bta_hd_cb.disable_w4_close = TRUE;
bta_hd_better_state_machine(BTA_HD_API_UNREGISTER_APP_EVT,
(tBTA_HD_DATA*)p_msg);
} else {
bta_hd_api_disable();
}
break;
default:
bta_hd_better_state_machine(p_msg->event, (tBTA_HD_DATA*)p_msg);
}
return (TRUE);
}
#endif /* BTA_HD_INCLUDED */
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