/****************************************************************************** * * Copyright (C) 2016 The Android Open Source Project * Copyright (C) 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 "common/bt_target.h" #if defined(BTA_HD_INCLUDED) && (BTA_HD_INCLUDED == TRUE) #include "bta/bta_hd_api.h" #include "bta_hd_int.h" #include <string.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; /* state machine actions */ enum { BTA_HD_REGISTER_ACT, BTA_HD_UNREGISTER_ACT, BTA_HD_UNREGISTER2_ACT, BTA_HD_CONNECT_ACT, BTA_HD_DISCONNECT_ACT, BTA_HD_ADD_DEVICE_ACT, BTA_HD_REMOVE_DEVICE_ACT, BTA_HD_SEND_REPORT_ACT, BTA_HD_REPORT_ERROR_ACT, BTA_HD_VC_UNPLUG_ACT, BTA_HD_OPEN_ACT, BTA_HD_CLOSE_ACT, BTA_HD_INTR_DATA_ACT, BTA_HD_GET_REPORT_ACT, BTA_HD_SET_REPORT_ACT, BTA_HD_SET_PROTOCOL_ACT, BTA_HD_VC_UNPLUG_DONE_ACT, BTA_HD_SUSPEND_ACT, BTA_HD_EXIT_SUSPEND_ACT, BTA_HD_NUM_ACTIONS }; #define BTA_HD_IGNORE BTA_HD_NUM_ACTIONS typedef void (*tBTA_HD_ACTION)(tBTA_HD_DATA *p_data); /* action functions */ const tBTA_HD_ACTION bta_hd_action[] = { bta_hd_register_act, bta_hd_unregister_act, bta_hd_unregister2_act, bta_hd_connect_act, bta_hd_disconnect_act, bta_hd_add_device_act, bta_hd_remove_device_act, bta_hd_send_report_act, bta_hd_report_error_act, bta_hd_vc_unplug_act, bta_hd_open_act, bta_hd_close_act, bta_hd_intr_data_act, bta_hd_get_report_act, bta_hd_set_report_act, bta_hd_set_protocol_act, bta_hd_vc_unplug_done_act, bta_hd_suspend_act, bta_hd_exit_suspend_act, }; /* state table information */ #define BTA_HD_ACTION 0 /* position of action */ #define BTA_HD_NEXT_STATE 1 /* position of next state */ #define BTA_HD_NUM_COLS 2 /* number of columns */ const uint8_t bta_hd_st_init[][BTA_HD_NUM_COLS] = { /* Event Action Next state */ /* BTA_HD_API_REGISTER_APP_EVT */ {BTA_HD_REGISTER_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_API_UNREGISTER_APP_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_API_CONNECT_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_API_DISCONNECT_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_API_ADD_DEVICE_EVT */ {BTA_HD_ADD_DEVICE_ACT, BTA_HD_INIT_ST}, /* BTA_HD_API_REMOVE_DEVICE_EVT */ {BTA_HD_REMOVE_DEVICE_ACT, BTA_HD_INIT_ST}, /* BTA_HD_API_SEND_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_API_REPORT_ERROR_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_API_VC_UNPLUG_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_OPEN_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_CLOSE_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_INTR_DATA_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_GET_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_SET_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_SET_PROTOCOL_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_VC_UNPLUG_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_SUSPEND_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, /* BTA_HD_INT_EXIT_SUSPEND_EVT */ {BTA_HD_IGNORE, BTA_HD_INIT_ST}, }; const uint8_t bta_hd_st_idle[][BTA_HD_NUM_COLS] = { /* Event Action Next state */ /* BTA_HD_API_REGISTER_APP_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_API_UNREGISTER_APP_EVT */ {BTA_HD_UNREGISTER_ACT, BTA_HD_INIT_ST}, /* BTA_HD_API_CONNECT_EVT */ {BTA_HD_CONNECT_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_API_DISCONNECT_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_API_ADD_DEVICE_EVT */ {BTA_HD_ADD_DEVICE_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_API_REMOVE_DEVICE_EVT */ {BTA_HD_REMOVE_DEVICE_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_API_SEND_REPORT_EVT */ {BTA_HD_SEND_REPORT_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_API_REPORT_ERROR_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_API_VC_UNPLUG_EVT */ {BTA_HD_VC_UNPLUG_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_INT_OPEN_EVT */ {BTA_HD_OPEN_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_CLOSE_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_INTR_DATA_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_GET_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_SET_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_SET_PROTOCOL_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_VC_UNPLUG_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_SUSPEND_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, /* BTA_HD_INT_EXIT_SUSPEND_EVT */ {BTA_HD_IGNORE, BTA_HD_IDLE_ST}, }; const uint8_t bta_hd_st_conn[][BTA_HD_NUM_COLS] = { /* Event Action Next state */ /* BTA_HD_API_REGISTER_APP_EVT */ {BTA_HD_IGNORE, BTA_HD_CONN_ST}, /* BTA_HD_API_UNREGISTER_APP_EVT */ {BTA_HD_DISCONNECT_ACT, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_CONNECT_EVT */ {BTA_HD_IGNORE, BTA_HD_CONN_ST}, /* BTA_HD_API_DISCONNECT_EVT */ {BTA_HD_DISCONNECT_ACT, BTA_HD_CONN_ST}, /* BTA_HD_API_ADD_DEVICE_EVT */ {BTA_HD_ADD_DEVICE_ACT, BTA_HD_CONN_ST}, /* BTA_HD_API_REMOVE_DEVICE_EVT */ {BTA_HD_REMOVE_DEVICE_ACT, BTA_HD_CONN_ST}, /* BTA_HD_API_SEND_REPORT_EVT */ {BTA_HD_SEND_REPORT_ACT, BTA_HD_CONN_ST}, /* BTA_HD_API_REPORT_ERROR_EVT */ {BTA_HD_REPORT_ERROR_ACT, BTA_HD_CONN_ST}, /* BTA_HD_API_VC_UNPLUG_EVT */ {BTA_HD_VC_UNPLUG_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_OPEN_EVT */ {BTA_HD_IGNORE, BTA_HD_CONN_ST}, /* BTA_HD_INT_CLOSE_EVT */ {BTA_HD_CLOSE_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_INT_INTR_DATA_EVT */ {BTA_HD_INTR_DATA_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_GET_REPORT_EVT */ {BTA_HD_GET_REPORT_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_SET_REPORT_EVT */ {BTA_HD_SET_REPORT_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_SET_PROTOCOL_EVT */ {BTA_HD_SET_PROTOCOL_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_VC_UNPLUG_EVT */ {BTA_HD_VC_UNPLUG_DONE_ACT, BTA_HD_IDLE_ST}, /* BTA_HD_INT_SUSPEND_EVT */ {BTA_HD_SUSPEND_ACT, BTA_HD_CONN_ST}, /* BTA_HD_INT_EXIT_SUSPEND_EVT */ {BTA_HD_EXIT_SUSPEND_ACT, BTA_HD_CONN_ST}, }; const uint8_t bta_hd_st_transient_to_init[][BTA_HD_NUM_COLS] = { /* Event Action Next state */ /* BTA_HD_API_REGISTER_APP_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_UNREGISTER_APP_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_CONNECT_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_DISCONNECT_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_ADD_DEVICE_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_REMOVE_DEVICE_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_SEND_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_REPORT_ERROR_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_API_VC_UNPLUG_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_OPEN_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_CLOSE_EVT */ {BTA_HD_UNREGISTER2_ACT, BTA_HD_INIT_ST}, /* BTA_HD_INT_INTR_DATA_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_GET_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_SET_REPORT_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_SET_PROTOCOL_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_VC_UNPLUG_EVT */ {BTA_HD_UNREGISTER2_ACT, BTA_HD_INIT_ST}, /* BTA_HD_INT_SUSPEND_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, /* BTA_HD_INT_EXIT_SUSPEND_EVT */ {BTA_HD_IGNORE, BTA_HD_TRANSIENT_TO_INIT_ST}, }; /* type for state table */ typedef const uint8_t (*tBTA_HD_ST_TBL)[BTA_HD_NUM_COLS]; /* state table */ const tBTA_HD_ST_TBL bta_hd_st_tbl[] = {bta_hd_st_init, bta_hd_st_idle, bta_hd_st_conn, bta_hd_st_transient_to_init}; /***************************************************************************** * Global data ****************************************************************************/ #if BTA_DYNAMIC_MEMORY == FALSE tBTA_HD_CB bta_hd_cb; #else tBTA_HD_CB *bta_hd_cb_ptr; #endif static const char *bta_hd_evt_code(tBTA_HD_INT_EVT evt_code); static const char *bta_hd_state_code(tBTA_HD_STATE state_code); /******************************************************************************* * * Function bta_hd_sm_execute * * Description State machine event handling function for HID Device * * Returns void * ******************************************************************************/ void bta_hd_sm_execute(uint16_t event, tBTA_HD_DATA *p_data) { tBTA_HD_ST_TBL state_table; tBTA_HD_STATE prev_state; uint8_t action; tBTA_HD cback_data; APPL_TRACE_EVENT("%s: state=%s (%d) event=%s (%d)", __func__, bta_hd_state_code(bta_hd_cb.state), bta_hd_cb.state, bta_hd_evt_code(event), event); prev_state = bta_hd_cb.state; memset(&cback_data, 0, sizeof(tBTA_HD)); state_table = bta_hd_st_tbl[bta_hd_cb.state]; event &= 0xff; if ((action = state_table[event][BTA_HD_ACTION]) < BTA_HD_IGNORE) { (*bta_hd_action[action])(p_data); } bta_hd_cb.state = state_table[event][BTA_HD_NEXT_STATE]; if (bta_hd_cb.state != prev_state) { APPL_TRACE_EVENT("%s: [new] state=%s (%d)", __func__, bta_hd_state_code(bta_hd_cb.state), bta_hd_cb.state); } return; } /******************************************************************************* * * Function bta_hd_hdl_event * * Description HID device main event handling function. * * Returns void * ******************************************************************************/ bool bta_hd_hdl_event(BT_HDR *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_sm_execute(BTA_HD_API_UNREGISTER_APP_EVT, (tBTA_HD_DATA *)p_msg); } else { bta_hd_api_disable(); } break; default: bta_hd_sm_execute(p_msg->event, (tBTA_HD_DATA *)p_msg); } return (TRUE); } static const char *bta_hd_evt_code(tBTA_HD_INT_EVT evt_code) { switch (evt_code) { case BTA_HD_API_REGISTER_APP_EVT: return "BTA_HD_API_REGISTER_APP_EVT"; case BTA_HD_API_UNREGISTER_APP_EVT: return "BTA_HD_API_UNREGISTER_APP_EVT"; case BTA_HD_API_CONNECT_EVT: return "BTA_HD_API_CONNECT_EVT"; case BTA_HD_API_DISCONNECT_EVT: return "BTA_HD_API_DISCONNECT_EVT"; case BTA_HD_API_ADD_DEVICE_EVT: return "BTA_HD_API_ADD_DEVICE_EVT"; case BTA_HD_API_REMOVE_DEVICE_EVT: return "BTA_HD_API_REMOVE_DEVICE_EVT"; case BTA_HD_API_SEND_REPORT_EVT: return "BTA_HD_API_SEND_REPORT_EVT"; case BTA_HD_API_REPORT_ERROR_EVT: return "BTA_HD_API_REPORT_ERROR_EVT"; case BTA_HD_API_VC_UNPLUG_EVT: return "BTA_HD_API_VC_UNPLUG_EVT"; case BTA_HD_INT_OPEN_EVT: return "BTA_HD_INT_OPEN_EVT"; case BTA_HD_INT_CLOSE_EVT: return "BTA_HD_INT_CLOSE_EVT"; case BTA_HD_INT_INTR_DATA_EVT: return "BTA_HD_INT_INTR_DATA_EVT"; case BTA_HD_INT_GET_REPORT_EVT: return "BTA_HD_INT_GET_REPORT_EVT"; case BTA_HD_INT_SET_REPORT_EVT: return "BTA_HD_INT_SET_REPORT_EVT"; case BTA_HD_INT_SET_PROTOCOL_EVT: return "BTA_HD_INT_SET_PROTOCOL_EVT"; case BTA_HD_INT_VC_UNPLUG_EVT: return "BTA_HD_INT_VC_UNPLUG_EVT"; case BTA_HD_INT_SUSPEND_EVT: return "BTA_HD_INT_SUSPEND_EVT"; case BTA_HD_INT_EXIT_SUSPEND_EVT: return "BTA_HD_INT_EXIT_SUSPEND_EVT"; default: return "<unknown>"; } } static const char *bta_hd_state_code(tBTA_HD_STATE state_code) { switch (state_code) { case BTA_HD_INIT_ST: return "BTA_HD_INIT_ST"; case BTA_HD_IDLE_ST: return "BTA_HD_IDLE_ST"; case BTA_HD_CONN_ST: return "BTA_HD_CONN_ST"; case BTA_HD_TRANSIENT_TO_INIT_ST: return "BTA_HD_TRANSIENT_TO_INIT_ST"; default: return "<unknown>"; } } #if BT_HID_DEVICE_BQB_INCLUDED tBTA_STATUS bta_hd_bqb_set_local_di_record(void) { tBTA_STATUS status = BTA_FAILURE; tBTA_DI_RECORD bqb_device_info; bqb_device_info.vendor = 0; bqb_device_info.vendor_id_source = 0xff; // BTA_HH_VENDOR_ID_INVALID bqb_device_info.product = 1; bqb_device_info.version = 0; bqb_device_info.primary_record = TRUE; return BTA_DmSetLocalDiRecord(&bqb_device_info, &bta_hd_cb.sdp_handle); } #endif /* BT_HID_DEVICE_BQB_INCLUDED */ #endif /* BTA_HD_INCLUDED */