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1 /******************************************************************************
2  *
3  *  Copyright (C) 1999-2012 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 file contains functions that interface with the NFC NCI transport.
22  *  On the receive side, it routes events to the appropriate handler
23  *  (callback). On the transmit side, it manages the command transmission.
24  *
25  ******************************************************************************/
26 #include "nfc_target.h"
27 #include "bt_types.h"
28 #include "nfc_api.h"
29 
30 #if (NFC_INCLUDED == TRUE)
31 #include "nfc_int.h"
32 
33 
34 /*******************************************************************************
35 **
36 ** Function         nfc_alloc_conn_cb
37 **
38 ** Description      This function is called to allocation a control block for
39 **                  NCI logical connection
40 **
41 ** Returns          The allocated control block or NULL
42 **
43 *******************************************************************************/
nfc_alloc_conn_cb(tNFC_CONN_CBACK * p_cback)44 tNFC_CONN_CB * nfc_alloc_conn_cb (tNFC_CONN_CBACK *p_cback)
45 {
46     int xx, max = NCI_MAX_CONN_CBS;
47     tNFC_CONN_CB *p_conn_cb = NULL;
48 
49     NFC_CHECK_MAX_CONN ();
50     for (xx = 0; xx < max; xx++)
51     {
52         if (nfc_cb.conn_cb[xx].conn_id == NFC_ILLEGAL_CONN_ID)
53         {
54             nfc_cb.conn_cb[xx].conn_id  = NFC_PEND_CONN_ID; /* to indicate this cb is used */
55             p_conn_cb                   = &nfc_cb.conn_cb[xx];
56             p_conn_cb->p_cback          = p_cback;
57             break;
58         }
59     }
60     return p_conn_cb;
61 }
62 
63 /*******************************************************************************
64 **
65 ** Function         nfc_set_conn_id
66 **
67 ** Description      This function is called to set the connection id to the
68 **                  connection control block and the id mapping table
69 **
70 ** Returns          void
71 **
72 *******************************************************************************/
nfc_set_conn_id(tNFC_CONN_CB * p_cb,UINT8 conn_id)73 void nfc_set_conn_id (tNFC_CONN_CB * p_cb, UINT8 conn_id)
74 {
75     UINT8   handle;
76 
77     if (p_cb == NULL)
78         return;
79 
80     p_cb->conn_id           = conn_id;
81     handle                  = (UINT8) (p_cb - nfc_cb.conn_cb + 1);
82     nfc_cb.conn_id[conn_id] = handle;
83     NFC_TRACE_DEBUG2 ("nfc_set_conn_id conn_id:%d, handle:%d", conn_id, handle);
84 }
85 
86 /*******************************************************************************
87 **
88 ** Function         nfc_find_conn_cb_by_handle
89 **
90 ** Description      This function is called to locate the control block for
91 **                  loopback test.
92 **
93 ** Returns          The loopback test control block or NULL
94 **
95 *******************************************************************************/
nfc_find_conn_cb_by_handle(UINT8 id)96 tNFC_CONN_CB * nfc_find_conn_cb_by_handle (UINT8 id)
97 {
98     int xx;
99     tNFC_CONN_CB *p_conn_cb = NULL;
100 
101     for (xx = 0; xx < NCI_MAX_CONN_CBS; xx++)
102     {
103         if (nfc_cb.conn_cb[xx].id == id)
104         {
105             p_conn_cb = &nfc_cb.conn_cb[xx];
106             break;
107         }
108     }
109     return p_conn_cb;
110 }
111 
112 /*******************************************************************************
113 **
114 ** Function         nfc_find_conn_cb_by_conn_id
115 **
116 ** Description      This function is called to locate the control block for
117 **                  the given connection id
118 **
119 ** Returns          The control block or NULL
120 **
121 *******************************************************************************/
nfc_find_conn_cb_by_conn_id(UINT8 conn_id)122 tNFC_CONN_CB * nfc_find_conn_cb_by_conn_id (UINT8 conn_id)
123 {
124     tNFC_CONN_CB *p_conn_cb = NULL;
125     UINT8   handle;
126     UINT8   id;
127     int     xx;
128 
129     if (conn_id == NFC_PEND_CONN_ID)
130     {
131         for (xx = 0; xx < NCI_MAX_CONN_CBS; xx++)
132         {
133             if (nfc_cb.conn_cb[xx].conn_id == NFC_PEND_CONN_ID)
134             {
135                 p_conn_cb   = &nfc_cb.conn_cb[xx];
136                 break;
137             }
138         }
139     }
140     else
141     {
142         id         = conn_id & NFC_CONN_ID_ID_MASK;
143         if (id < NFC_MAX_CONN_ID)
144         {
145             handle = nfc_cb.conn_id[id];
146             if (handle > 0)
147                 p_conn_cb = &nfc_cb.conn_cb[handle - 1];
148         }
149     }
150 
151     return p_conn_cb;
152 }
153 
154 /*******************************************************************************
155 **
156 ** Function         nfc_free_conn_cb
157 **
158 ** Description      This function is called to free the control block and
159 **                  resources and id mapping table
160 **
161 ** Returns          void
162 **
163 *******************************************************************************/
nfc_free_conn_cb(tNFC_CONN_CB * p_cb)164 void nfc_free_conn_cb (tNFC_CONN_CB *p_cb)
165 {
166     void    *p_buf;
167 
168     if (p_cb == NULL)
169         return;
170 
171     while ((p_buf = GKI_dequeue (&p_cb->rx_q)) != NULL)
172         GKI_freebuf (p_buf);
173 
174     while ((p_buf = GKI_dequeue (&p_cb->tx_q)) != NULL)
175         GKI_freebuf (p_buf);
176 
177     nfc_cb.conn_id[p_cb->conn_id]   = 0;
178     p_cb->p_cback                   = NULL;
179     p_cb->conn_id                   = NFC_ILLEGAL_CONN_ID;
180 }
181 
182 /*******************************************************************************
183 **
184 ** Function         nfc_reset_all_conn_cbs
185 **
186 ** Description      This function is called to free all the control blocks and
187 **                  resources and id mapping table
188 **
189 ** Returns          void
190 **
191 *******************************************************************************/
nfc_reset_all_conn_cbs(void)192 NFC_API extern void nfc_reset_all_conn_cbs (void)
193 {
194     int xx;
195     tNFC_CONN_CB *p_conn_cb = &nfc_cb.conn_cb[0];
196     tNFC_DEACTIVATE_DEVT    deact;
197 
198     deact.status     = NFC_STATUS_NOT_INITIALIZED;
199     deact.type       = NFC_DEACTIVATE_TYPE_IDLE;
200     deact.is_ntf     = TRUE;
201     for (xx = 0; xx < NCI_MAX_CONN_CBS; xx++, p_conn_cb++)
202     {
203         if (p_conn_cb->conn_id != NFC_ILLEGAL_CONN_ID)
204         {
205             if (p_conn_cb->p_cback)
206                 (*p_conn_cb->p_cback) (p_conn_cb->conn_id, NFC_DEACTIVATE_CEVT, (tNFC_CONN *) &deact);
207             nfc_free_conn_cb (p_conn_cb);
208         }
209     }
210 }
211 
212 
213 #endif /* NFC_INCLUDED == TRUE */
214