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 *******************************************************************************/
mca_dcb_report_cong(tMCA_DCB * p_dcb)42 void 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 *******************************************************************************/
mca_dcb_tc_open(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)63 void 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 *******************************************************************************/
mca_dcb_cong(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)88 void 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 *******************************************************************************/
mca_dcb_free_data(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)103 void 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 *******************************************************************************/
mca_dcb_do_disconn(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)119 void 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 *******************************************************************************/
mca_dcb_snd_data(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)142 void 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 *******************************************************************************/
mca_dcb_hdl_data(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)165 void 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