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/******************************************************************************
*
* 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 "bt_target.h"
#if defined(BTA_HH_INCLUDED) && (BTA_HH_INCLUDED == TRUE)
#include <string.h>
#include "bta_hh_api.h"
#include "bta_hh_int.h"
#include "gki.h"
/*****************************************************************************
** Constants and types
*****************************************************************************/
/* state machine action enumeration list */
enum
{
BTA_HH_API_DISC_ACT, /* HID host process API close action */
BTA_HH_OPEN_ACT, /* HID host process BTA_HH_EVT_OPEN */
BTA_HH_CLOSE_ACT, /* HID host process BTA_HH_EVT_CLOSE */
BTA_HH_DATA_ACT, /* HID host receive data report */
BTA_HH_CTRL_DAT_ACT,
BTA_HH_HANDSK_ACT,
BTA_HH_START_SDP, /* HID host inquery */
BTA_HH_SDP_CMPL,
BTA_HH_WRITE_DEV_ACT,
BTA_HH_GET_DSCP_ACT,
BTA_HH_MAINT_DEV_ACT,
BTA_HH_OPEN_CMPL_ACT,
BTA_HH_NUM_ACTIONS
};
#define BTA_HH_IGNORE BTA_HH_NUM_ACTIONS
/* type for action functions */
typedef void (*tBTA_HH_ACTION)(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_data);
/* action functions */
const tBTA_HH_ACTION bta_hh_action[] =
{
bta_hh_api_disc_act,
bta_hh_open_act,
bta_hh_close_act,
bta_hh_data_act,
bta_hh_ctrl_dat_act,
bta_hh_handsk_act,
bta_hh_start_sdp,
bta_hh_sdp_cmpl,
bta_hh_write_dev_act,
bta_hh_get_dscp_act,
bta_hh_maint_dev_act,
bta_hh_open_cmpl_act
};
/* state table information */
#define BTA_HH_ACTION 0 /* position of action */
#define BTA_HH_NEXT_STATE 1 /* position of next state */
#define BTA_HH_NUM_COLS 2 /* number of columns */
/* state table for idle state */
const UINT8 bta_hh_st_idle[][BTA_HH_NUM_COLS] =
{
/* Event Action Next state */
/* BTA_HH_API_OPEN_EVT */ {BTA_HH_START_SDP, BTA_HH_W4_CONN_ST },
/* BTA_HH_API_CLOSE_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_INT_OPEN_EVT */ {BTA_HH_OPEN_ACT, BTA_HH_W4_CONN_ST },
/* BTA_HH_INT_CLOSE_EVT */ {BTA_HH_CLOSE_ACT, BTA_HH_IDLE_ST },
/* BTA_HH_INT_DATA_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_INT_CTRL_DATA */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_INT_HANDSK_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_SDP_CMPL_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_API_WRITE_DEV_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_API_GET_DSCP_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_API_MAINT_DEV_EVT */ {BTA_HH_MAINT_DEV_ACT, BTA_HH_IDLE_ST },
/* BTA_HH_OPEN_CMPL_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST }
};
const UINT8 bta_hh_st_w4_conn[][BTA_HH_NUM_COLS] =
{
/* Event Action Next state */
/* BTA_HH_API_OPEN_EVT */ {BTA_HH_IGNORE, BTA_HH_W4_CONN_ST },
/* BTA_HH_API_CLOSE_EVT */ {BTA_HH_IGNORE, BTA_HH_IDLE_ST },
/* BTA_HH_INT_OPEN_EVT */ {BTA_HH_OPEN_ACT, BTA_HH_W4_CONN_ST },
/* BTA_HH_INT_CLOSE_EVT */ {BTA_HH_CLOSE_ACT, BTA_HH_IDLE_ST },
/* BTA_HH_INT_DATA_EVT */ {BTA_HH_IGNORE, BTA_HH_W4_CONN_ST },
/* BTA_HH_INT_CTRL_DATA */ {BTA_HH_IGNORE, BTA_HH_W4_CONN_ST },
/* BTA_HH_INT_HANDSK_EVT */ {BTA_HH_IGNORE, BTA_HH_W4_CONN_ST },
/* BTA_HH_SDP_CMPL_EVT */ {BTA_HH_SDP_CMPL, BTA_HH_W4_CONN_ST },
/* BTA_HH_API_WRITE_DEV_EVT */ {BTA_HH_IGNORE , BTA_HH_W4_CONN_ST },
/* BTA_HH_API_GET_DSCP_EVT */ {BTA_HH_IGNORE, BTA_HH_W4_CONN_ST },
/* BTA_HH_API_MAINT_DEV_EVT */ {BTA_HH_MAINT_DEV_ACT, BTA_HH_IDLE_ST },
/* BTA_HH_OPEN_CMPL_EVT */ {BTA_HH_OPEN_CMPL_ACT, BTA_HH_CONN_ST }
};
const UINT8 bta_hh_st_connected[][BTA_HH_NUM_COLS] =
{
/* Event Action Next state */
/* BTA_HH_API_OPEN_EVT */ {BTA_HH_IGNORE, BTA_HH_CONN_ST },
/* BTA_HH_API_CLOSE_EVT */ {BTA_HH_API_DISC_ACT, BTA_HH_CONN_ST },
/* BTA_HH_INT_OPEN_EVT */ {BTA_HH_OPEN_ACT, BTA_HH_CONN_ST },
/* BTA_HH_INT_CLOSE_EVT */ {BTA_HH_CLOSE_ACT, BTA_HH_IDLE_ST },
/* BTA_HH_INT_DATA_EVT */ {BTA_HH_DATA_ACT, BTA_HH_CONN_ST },
/* BTA_HH_INT_CTRL_DATA */ {BTA_HH_CTRL_DAT_ACT, BTA_HH_CONN_ST },
/* BTA_HH_INT_HANDSK_EVT */ {BTA_HH_HANDSK_ACT, BTA_HH_CONN_ST },
/* BTA_HH_SDP_CMPL_EVT */ {BTA_HH_IGNORE, BTA_HH_CONN_ST },
/* BTA_HH_API_WRITE_DEV_EVT */ {BTA_HH_WRITE_DEV_ACT, BTA_HH_CONN_ST },
/* BTA_HH_API_GET_DSCP_EVT */ {BTA_HH_GET_DSCP_ACT, BTA_HH_CONN_ST },
/* BTA_HH_API_MAINT_DEV_EVT */ {BTA_HH_MAINT_DEV_ACT, BTA_HH_CONN_ST },
/* BTA_HH_OPEN_CMPL_EVT */ {BTA_HH_IGNORE, BTA_HH_CONN_ST }
};
/* type for state table */
typedef const UINT8 (*tBTA_HH_ST_TBL)[BTA_HH_NUM_COLS];
/* state table */
const tBTA_HH_ST_TBL bta_hh_st_tbl[] =
{
bta_hh_st_idle,
bta_hh_st_w4_conn,
bta_hh_st_connected
};
/*****************************************************************************
** Global data
*****************************************************************************/
#if BTA_DYNAMIC_MEMORY == FALSE
tBTA_HH_CB bta_hh_cb;
#endif
/*****************************************************************************
** Static functions
*****************************************************************************/
#if BTA_HH_DEBUG == TRUE
static char *bta_hh_evt_code(tBTA_HH_INT_EVT evt_code);
static char *bta_hh_state_code(tBTA_HH_STATE state_code);
#endif
/*******************************************************************************
**
** Function bta_hh_sm_execute
**
** Description State machine event handling function for HID Host
**
**
** Returns void
**
*******************************************************************************/
void bta_hh_sm_execute(tBTA_HH_DEV_CB *p_cb, UINT16 event, tBTA_HH_DATA * p_data)
{
tBTA_HH_ST_TBL state_table;
UINT8 action;
tBTA_HH cback_data;
tBTA_HH_EVT cback_event = 0;
#if BTA_HH_DEBUG == TRUE
tBTA_HH_STATE in_state ;
UINT16 debug_event = event;
#endif
memset(&cback_data, 0, sizeof(tBTA_HH));
/* handle exception, no valid control block was found */
if (!p_cb)
{
/* BTA HH enabled already? otherwise ignore the event although it's bad*/
if (bta_hh_cb.p_cback != NULL)
{
switch (event)
{
/* no control block available for new connection */
case BTA_HH_API_OPEN_EVT:
cback_event = BTA_HH_OPEN_EVT;
/* build cback data */
bdcpy(cback_data.conn.bda, ((tBTA_HH_API_CONN *)p_data)->bd_addr);
cback_data.conn.status = BTA_HH_ERR_DB_FULL;
cback_data.conn.handle = BTA_HH_INVALID_HANDLE;
break;
/* DB full, BTA_HhAddDev */
case BTA_HH_API_MAINT_DEV_EVT:
cback_event = p_data->api_maintdev.sub_event;
if (p_data->api_maintdev.sub_event == BTA_HH_ADD_DEV_EVT)
{
bdcpy(cback_data.dev_info.bda, p_data->api_maintdev.bda);
cback_data.dev_info.status = BTA_HH_ERR_DB_FULL;
cback_data.dev_info.handle = BTA_HH_INVALID_HANDLE;
}
else
{
cback_data.dev_info.status = BTA_HH_ERR_HDL;
cback_data.dev_info.handle = (UINT8)p_data->api_maintdev.hdr.layer_specific;
}
break;
case BTA_HH_API_WRITE_DEV_EVT:
cback_event = (p_data->api_sndcmd.t_type - BTA_HH_FST_BTE_TRANS_EVT) +
BTA_HH_FST_TRANS_CB_EVT;
if (p_data->api_sndcmd.t_type == HID_TRANS_SET_PROTOCOL ||
p_data->api_sndcmd.t_type == HID_TRANS_SET_REPORT ||
p_data->api_sndcmd.t_type == HID_TRANS_SET_IDLE)
{
cback_data.dev_status.status = BTA_HH_ERR_HDL;
cback_data.dev_status.handle = (UINT8)p_data->api_sndcmd.hdr.layer_specific;
}
else if (p_data->api_sndcmd.t_type != HID_TRANS_DATA &&
p_data->api_sndcmd.t_type != HID_TRANS_CONTROL)
{
cback_data.hs_data.handle = (UINT8)p_data->api_sndcmd.hdr.layer_specific;
cback_data.hs_data.status = BTA_HH_ERR_HDL;
/* hs_data.rsp_data will be all zero, which is not valid value */
}
break;
case BTA_HH_API_CLOSE_EVT:
cback_event = BTA_HH_CLOSE_EVT;
cback_data.dev_status.status = BTA_HH_ERR_HDL;
cback_data.dev_status.handle = (UINT8)p_data->api_sndcmd.hdr.layer_specific;
break;
default:
/* invalid handle, call bad API event */
APPL_TRACE_ERROR1("wrong device handle: [%d]", p_data->hdr.layer_specific);
break;
}
if (cback_event)
(* bta_hh_cb.p_cback)(cback_event, &cback_data);
}
}
/* corresponding CB is found, go to state machine */
else
{
#if BTA_HH_DEBUG == TRUE
in_state = p_cb->state;
APPL_TRACE_EVENT3("bta_hh_sm_execute: State 0x%02x [%s], Event [%s]",
in_state, bta_hh_state_code(in_state),
bta_hh_evt_code(debug_event));
#endif
state_table = bta_hh_st_tbl[p_cb->state - 1];
event &= 0xff;
p_cb->state = state_table[event][BTA_HH_NEXT_STATE] ;
if ((action = state_table[event][BTA_HH_ACTION]) != BTA_HH_IGNORE)
{
(*bta_hh_action[action])(p_cb, p_data);
}
#if BTA_HH_DEBUG == TRUE
if (in_state != p_cb->state)
{
APPL_TRACE_DEBUG3("HH State Change: [%s] -> [%s] after Event [%s]",
bta_hh_state_code(in_state),
bta_hh_state_code(p_cb->state),
bta_hh_evt_code(debug_event));
}
#endif
}
return;
}
/*******************************************************************************
**
** Function bta_hh_hdl_event
**
** Description HID host main event handling function.
**
**
** Returns void
**
*******************************************************************************/
BOOLEAN bta_hh_hdl_event(BT_HDR *p_msg)
{
UINT8 index = BTA_HH_MAX_KNOWN;
tBTA_HH_DEV_CB *p_cb = NULL;
switch (p_msg->event)
{
case BTA_HH_API_ENABLE_EVT:
bta_hh_api_enable((tBTA_HH_DATA *) p_msg);
break;
case BTA_HH_API_DISABLE_EVT:
bta_hh_api_disable();
break;
case BTA_HH_DISC_CMPL_EVT: /* disable complete */
bta_hh_disc_cmpl();
break;
default:
/* all events processed in state machine need to find corresponding
CB before proceed */
if (p_msg->event == BTA_HH_API_OPEN_EVT)
{
index = bta_hh_find_cb(((tBTA_HH_API_CONN *)p_msg)->bd_addr);
}
else if (p_msg->event == BTA_HH_API_MAINT_DEV_EVT)
{
/* if add device */
if (((tBTA_HH_MAINT_DEV *)p_msg)->sub_event == BTA_HH_ADD_DEV_EVT)
{
index = bta_hh_find_cb(((tBTA_HH_MAINT_DEV *)p_msg)->bda);
}
else /* else remove device by handle */
{
index = bta_hh_cb.cb_index[p_msg->layer_specific];
// btla-specific ++
/* If BT disable is done while the HID device is connected and Link_Key uses unauthenticated combination
* then we can get into a situation where remove_bonding is called with the index set to 0 (without getting
* cleaned up). Only when VIRTUAL_UNPLUG is called do we cleanup the index and make it MAX_KNOWN.
* So if REMOVE_DEVICE is called and in_use is FALSE then we should treat this as a NULL p_cb. Hence we
* force the index to be MAX_KNOWN
*/
if (bta_hh_cb.kdev[index].in_use == FALSE) {
index = BTA_HH_MAX_KNOWN;
}
// btla-specific --
}
}
else if (p_msg->layer_specific < BTA_HH_MAX_KNOWN )
index = bta_hh_cb.cb_index[p_msg->layer_specific];
if (index != BTA_HH_MAX_KNOWN)
p_cb = &bta_hh_cb.kdev[index];
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG2("bta_hh_hdl_event:: handle = %d dev_cb[%d] ", p_msg->layer_specific, index);
#endif
bta_hh_sm_execute(p_cb, p_msg->event, (tBTA_HH_DATA *) p_msg);
}
return (TRUE);
}
/*****************************************************************************
** Debug Functions
*****************************************************************************/
#if BTA_HH_DEBUG
/*******************************************************************************
**
** Function bta_hh_evt_code
**
** Description
**
** Returns void
**
*******************************************************************************/
static char *bta_hh_evt_code(tBTA_HH_INT_EVT evt_code)
{
switch(evt_code)
{
case BTA_HH_API_DISABLE_EVT:
return "BTA_HH_API_DISABLE_EVT";
case BTA_HH_API_ENABLE_EVT:
return "BTA_HH_API_ENABLE_EVT";
case BTA_HH_API_OPEN_EVT:
return "BTA_HH_API_OPEN_EVT";
case BTA_HH_API_CLOSE_EVT:
return "BTA_HH_API_CLOSE_EVT";
case BTA_HH_INT_OPEN_EVT:
return "BTA_HH_INT_OPEN_EVT";
case BTA_HH_INT_CLOSE_EVT:
return "BTA_HH_INT_CLOSE_EVT";
case BTA_HH_INT_HANDSK_EVT:
return "BTA_HH_INT_HANDSK_EVT";
case BTA_HH_INT_DATA_EVT:
return "BTA_HH_INT_DATA_EVT";
case BTA_HH_INT_CTRL_DATA:
return "BTA_HH_INT_CTRL_DATA";
case BTA_HH_API_WRITE_DEV_EVT:
return "BTA_HH_API_WRITE_DEV_EVT";
case BTA_HH_SDP_CMPL_EVT:
return "BTA_HH_SDP_CMPL_EVT";
case BTA_HH_DISC_CMPL_EVT:
return "BTA_HH_DISC_CMPL_EVT";
case BTA_HH_API_MAINT_DEV_EVT:
return "BTA_HH_API_MAINT_DEV_EVT";
case BTA_HH_API_GET_DSCP_EVT:
return "BTA_HH_API_GET_DSCP_EVT";
case BTA_HH_OPEN_CMPL_EVT:
return "BTA_HH_OPEN_CMPL_EVT";
default:
return "unknown HID Host event code";
}
}
/*******************************************************************************
**
** Function bta_hh_state_code
**
** Description get string representation of HID host state code.
**
** Returns void
**
*******************************************************************************/
static char *bta_hh_state_code(tBTA_HH_STATE state_code)
{
switch (state_code)
{
case BTA_HH_NULL_ST:
return"BTA_HH_NULL_ST";
case BTA_HH_IDLE_ST:
return "BTA_HH_IDLE_ST";
case BTA_HH_W4_CONN_ST:
return "BTA_HH_W4_CONN_ST";
case BTA_HH_CONN_ST:
return "BTA_HH_CONN_ST";
default:
return "unknown HID Host state";
}
}
#endif /* Debug Functions */
#endif /* BTA_HH_INCLUDED */
|
