1/******************************************************************************
2 *
3 *  Copyright (C) 2009-2012 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19/******************************************************************************
20 *
21 *  This is the implementation file for the MCAP Data Channel Action
22 *  Functions.
23 *
24 ******************************************************************************/
25#include "bt_target.h"
26#include "bt_utils.h"
27#include "gki.h"
28#include "mca_api.h"
29#include "mca_int.h"
30
31/*******************************************************************************
32**
33** Function         mca_dcb_report_cong
34**
35** Description      This function is called to report the congestion flag.
36**
37** Returns          void.
38**
39*******************************************************************************/
40void mca_dcb_report_cong (tMCA_DCB *p_dcb)
41{
42    tMCA_CTRL   evt_data;
43
44    evt_data.cong_chg.cong   = p_dcb->cong;
45    evt_data.cong_chg.mdl    = mca_dcb_to_hdl(p_dcb);
46    evt_data.cong_chg.mdl_id = p_dcb->mdl_id;
47    mca_ccb_report_event (p_dcb->p_ccb, MCA_CONG_CHG_EVT, &evt_data);
48}
49
50/*******************************************************************************
51**
52** Function         mca_dcb_tc_open
53**
54** Description      This function is called to report MCA_OPEN_IND_EVT or
55**                  MCA_OPEN_CFM_EVT event.
56**                  It also clears the congestion flag (dcb.cong).
57**
58** Returns          void.
59**
60*******************************************************************************/
61void mca_dcb_tc_open (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
62{
63    tMCA_CTRL   evt_data;
64    tMCA_CCB    *p_ccb = p_dcb->p_ccb;
65    UINT8       event = MCA_OPEN_IND_EVT;
66
67    if (p_data->open.param == MCA_INT)
68        event = MCA_OPEN_CFM_EVT;
69    p_dcb->cong  = FALSE;
70    evt_data.open_cfm.mtu       = p_data->open.peer_mtu;
71    evt_data.open_cfm.mdl_id    = p_dcb->mdl_id;
72    evt_data.open_cfm.mdl       = mca_dcb_to_hdl(p_dcb);
73    mca_ccb_event (p_ccb, MCA_CCB_DL_OPEN_EVT, NULL);
74    mca_ccb_report_event (p_ccb, event, &evt_data);
75}
76
77/*******************************************************************************
78**
79** Function         mca_dcb_cong
80**
81** Description      This function sets the congestion state for the DCB.
82**
83** Returns          void.
84**
85*******************************************************************************/
86void mca_dcb_cong (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
87{
88    p_dcb->cong  = p_data->llcong;
89    mca_dcb_report_cong(p_dcb);
90}
91
92/*******************************************************************************
93**
94** Function         mca_dcb_free_data
95**
96** Description      This function frees the received message.
97**
98** Returns          void.
99**
100*******************************************************************************/
101void mca_dcb_free_data (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
102{
103    UNUSED(p_dcb);
104
105    GKI_freebuf (p_data);
106}
107
108/*******************************************************************************
109**
110** Function         mca_dcb_do_disconn
111**
112** Description      This function closes a data channel.
113**
114** Returns          void.
115**
116*******************************************************************************/
117void mca_dcb_do_disconn (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
118{
119    tMCA_CLOSE  close;
120    UNUSED(p_data);
121
122    if ((p_dcb->lcid == 0) || (L2CA_DisconnectReq(p_dcb->lcid) == FALSE))
123    {
124        close.param  = MCA_INT;
125        close.reason = L2CAP_DISC_OK;
126        close.lcid   = 0;
127        mca_dcb_event(p_dcb, MCA_DCB_TC_CLOSE_EVT, (tMCA_DCB_EVT *) &close);
128    }
129}
130
131/*******************************************************************************
132**
133** Function         mca_dcb_snd_data
134**
135** Description      This function sends the data from application to the peer device.
136**
137** Returns          void.
138**
139*******************************************************************************/
140void mca_dcb_snd_data (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
141{
142    UINT8   status;
143
144    /* do not need to check cong, because API already checked the status */
145    status = L2CA_DataWrite (p_dcb->lcid, p_data->p_pkt);
146    if (status == L2CAP_DW_CONGESTED)
147    {
148        p_dcb->cong = TRUE;
149        mca_dcb_report_cong(p_dcb);
150    }
151}
152
153/*******************************************************************************
154**
155** Function         mca_dcb_hdl_data
156**
157** Description      This function reports the received data through the data
158**                  callback function.
159**
160** Returns          void.
161**
162*******************************************************************************/
163void mca_dcb_hdl_data (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
164{
165    (*p_dcb->p_cs->p_data_cback) (mca_dcb_to_hdl(p_dcb), (BT_HDR *)p_data);
166}
167
168