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
26#include <stddef.h>
27#include "bt_target.h"
28#include "bt_utils.h"
29#include "gki.h"
30#include "mca_api.h"
31#include "mca_int.h"
32
33/*******************************************************************************
34**
35** Function         mca_dcb_report_cong
36**
37** Description      This function is called to report the congestion flag.
38**
39** Returns          void.
40**
41*******************************************************************************/
42void mca_dcb_report_cong (tMCA_DCB *p_dcb)
43{
44    tMCA_CTRL   evt_data;
45
46    evt_data.cong_chg.cong   = p_dcb->cong;
47    evt_data.cong_chg.mdl    = mca_dcb_to_hdl(p_dcb);
48    evt_data.cong_chg.mdl_id = p_dcb->mdl_id;
49    mca_ccb_report_event (p_dcb->p_ccb, MCA_CONG_CHG_EVT, &evt_data);
50}
51
52/*******************************************************************************
53**
54** Function         mca_dcb_tc_open
55**
56** Description      This function is called to report MCA_OPEN_IND_EVT or
57**                  MCA_OPEN_CFM_EVT event.
58**                  It also clears the congestion flag (dcb.cong).
59**
60** Returns          void.
61**
62*******************************************************************************/
63void mca_dcb_tc_open (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
64{
65    tMCA_CTRL   evt_data;
66    tMCA_CCB    *p_ccb = p_dcb->p_ccb;
67    UINT8       event = MCA_OPEN_IND_EVT;
68
69    if (p_data->open.param == MCA_INT)
70        event = MCA_OPEN_CFM_EVT;
71    p_dcb->cong  = FALSE;
72    evt_data.open_cfm.mtu       = p_data->open.peer_mtu;
73    evt_data.open_cfm.mdl_id    = p_dcb->mdl_id;
74    evt_data.open_cfm.mdl       = mca_dcb_to_hdl(p_dcb);
75    mca_ccb_event (p_ccb, MCA_CCB_DL_OPEN_EVT, NULL);
76    mca_ccb_report_event (p_ccb, event, &evt_data);
77}
78
79/*******************************************************************************
80**
81** Function         mca_dcb_cong
82**
83** Description      This function sets the congestion state for the DCB.
84**
85** Returns          void.
86**
87*******************************************************************************/
88void mca_dcb_cong (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
89{
90    p_dcb->cong  = p_data->llcong;
91    mca_dcb_report_cong(p_dcb);
92}
93
94/*******************************************************************************
95**
96** Function         mca_dcb_free_data
97**
98** Description      This function frees the received message.
99**
100** Returns          void.
101**
102*******************************************************************************/
103void mca_dcb_free_data (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
104{
105    UNUSED(p_dcb);
106
107    GKI_freebuf (p_data);
108}
109
110/*******************************************************************************
111**
112** Function         mca_dcb_do_disconn
113**
114** Description      This function closes a data channel.
115**
116** Returns          void.
117**
118*******************************************************************************/
119void mca_dcb_do_disconn (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
120{
121    tMCA_CLOSE  close;
122    UNUSED(p_data);
123
124    if ((p_dcb->lcid == 0) || (L2CA_DisconnectReq(p_dcb->lcid) == FALSE))
125    {
126        close.param  = MCA_INT;
127        close.reason = L2CAP_DISC_OK;
128        close.lcid   = 0;
129        mca_dcb_event(p_dcb, MCA_DCB_TC_CLOSE_EVT, (tMCA_DCB_EVT *) &close);
130    }
131}
132
133/*******************************************************************************
134**
135** Function         mca_dcb_snd_data
136**
137** Description      This function sends the data from application to the peer device.
138**
139** Returns          void.
140**
141*******************************************************************************/
142void mca_dcb_snd_data (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
143{
144    UINT8   status;
145
146    /* do not need to check cong, because API already checked the status */
147    status = L2CA_DataWrite (p_dcb->lcid, p_data->p_pkt);
148    if (status == L2CAP_DW_CONGESTED)
149    {
150        p_dcb->cong = TRUE;
151        mca_dcb_report_cong(p_dcb);
152    }
153}
154
155/*******************************************************************************
156**
157** Function         mca_dcb_hdl_data
158**
159** Description      This function reports the received data through the data
160**                  callback function.
161**
162** Returns          void.
163**
164*******************************************************************************/
165void mca_dcb_hdl_data (tMCA_DCB *p_dcb, tMCA_DCB_EVT *p_data)
166{
167    (*p_dcb->p_cs->p_data_cback) (mca_dcb_to_hdl(p_dcb), (BT_HDR *)p_data);
168}
169
170