| /****************************************************************************** |
| * |
| * 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 */ |