1 /******************************************************************************
2 *
3 * Copyright (C) 1999-2014 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 <android-base/logging.h>
27 #include <android-base/stringprintf.h>
28
29 #include "bt_types.h"
30 #include "nfc_api.h"
31 #include "nfc_int.h"
32
33 using android::base::StringPrintf;
34
35 /*******************************************************************************
36 **
37 ** Function nfc_alloc_conn_cb
38 **
39 ** Description This function is called to allocation a control block for
40 ** NCI logical connection
41 **
42 ** Returns The allocated control block or NULL
43 **
44 *******************************************************************************/
nfc_alloc_conn_cb(tNFC_CONN_CBACK * p_cback)45 tNFC_CONN_CB* nfc_alloc_conn_cb(tNFC_CONN_CBACK* p_cback) {
46 int xx, max = NCI_MAX_CONN_CBS;
47 tNFC_CONN_CB* p_conn_cb = nullptr;
48
49 NFC_CHECK_MAX_CONN();
50 for (xx = 0; xx < max; xx++) {
51 if (nfc_cb.conn_cb[xx].conn_id == NFC_ILLEGAL_CONN_ID) {
52 nfc_cb.conn_cb[xx].conn_id =
53 NFC_PEND_CONN_ID; /* to indicate this cb is used */
54 p_conn_cb = &nfc_cb.conn_cb[xx];
55 p_conn_cb->p_cback = p_cback;
56 break;
57 }
58 }
59 return p_conn_cb;
60 }
61
62 /*******************************************************************************
63 **
64 ** Function nfc_set_conn_id
65 **
66 ** Description This function is called to set the connection id to the
67 ** connection control block and the id mapping table
68 **
69 ** Returns void
70 **
71 *******************************************************************************/
nfc_set_conn_id(tNFC_CONN_CB * p_cb,uint8_t conn_id)72 void nfc_set_conn_id(tNFC_CONN_CB* p_cb, uint8_t conn_id) {
73 uint8_t handle;
74
75 if (p_cb == nullptr) return;
76
77 p_cb->conn_id = conn_id;
78 handle = (uint8_t)(p_cb - nfc_cb.conn_cb + 1);
79 nfc_cb.conn_id[conn_id] = handle;
80 LOG(VERBOSE) << StringPrintf("nfc_set_conn_id conn_id:%d, handle:%d", conn_id,
81 handle);
82 }
83
84 /*******************************************************************************
85 **
86 ** Function nfc_find_conn_cb_by_handle
87 **
88 ** Description This function is called to locate the control block for
89 ** loopback test.
90 **
91 ** Returns The loopback test control block or NULL
92 **
93 *******************************************************************************/
nfc_find_conn_cb_by_handle(uint8_t id)94 tNFC_CONN_CB* nfc_find_conn_cb_by_handle(uint8_t id) {
95 int xx;
96 tNFC_CONN_CB* p_conn_cb = nullptr;
97
98 for (xx = 0; xx < NCI_MAX_CONN_CBS; xx++) {
99 if (nfc_cb.conn_cb[xx].id == id) {
100 p_conn_cb = &nfc_cb.conn_cb[xx];
101 break;
102 }
103 }
104 return p_conn_cb;
105 }
106
107 /*******************************************************************************
108 **
109 ** Function nfc_find_conn_cb_by_conn_id
110 **
111 ** Description This function is called to locate the control block for
112 ** the given connection id
113 **
114 ** Returns The control block or NULL
115 **
116 *******************************************************************************/
nfc_find_conn_cb_by_conn_id(uint8_t conn_id)117 tNFC_CONN_CB* nfc_find_conn_cb_by_conn_id(uint8_t conn_id) {
118 tNFC_CONN_CB* p_conn_cb = nullptr;
119 uint8_t handle;
120 uint8_t id;
121 int xx;
122
123 if (conn_id == NFC_PEND_CONN_ID) {
124 for (xx = 0; xx < NCI_MAX_CONN_CBS; xx++) {
125 if (nfc_cb.conn_cb[xx].conn_id == NFC_PEND_CONN_ID) {
126 p_conn_cb = &nfc_cb.conn_cb[xx];
127 break;
128 }
129 }
130 } else {
131 id = conn_id & NFC_CONN_ID_ID_MASK;
132 if (id < NFC_MAX_CONN_ID) {
133 handle = nfc_cb.conn_id[id];
134 if (handle > 0) p_conn_cb = &nfc_cb.conn_cb[handle - 1];
135 }
136 }
137
138 return p_conn_cb;
139 }
140
141 /*******************************************************************************
142 **
143 ** Function nfc_free_conn_cb
144 **
145 ** Description This function is called to free the control block and
146 ** resources and id mapping table
147 **
148 ** Returns void
149 **
150 *******************************************************************************/
nfc_free_conn_cb(tNFC_CONN_CB * p_cb)151 void nfc_free_conn_cb(tNFC_CONN_CB* p_cb) {
152 void* p_buf;
153
154 if (p_cb == nullptr) return;
155
156 while ((p_buf = GKI_dequeue(&p_cb->rx_q)) != nullptr) GKI_freebuf(p_buf);
157
158 while ((p_buf = GKI_dequeue(&p_cb->tx_q)) != nullptr) GKI_freebuf(p_buf);
159
160 if (p_cb->conn_id <= NFC_MAX_CONN_ID) {
161 nfc_cb.conn_id[p_cb->conn_id] = 0;
162 } else {
163 LOG(ERROR) << StringPrintf("invalid conn_id.");
164 }
165 p_cb->p_cback = nullptr;
166 p_cb->conn_id = NFC_ILLEGAL_CONN_ID;
167 }
168
169 /*******************************************************************************
170 **
171 ** Function nfc_reset_all_conn_cbs
172 **
173 ** Description This function is called to free all the control blocks and
174 ** resources and id mapping table
175 **
176 ** Returns void
177 **
178 *******************************************************************************/
nfc_reset_all_conn_cbs(void)179 extern void nfc_reset_all_conn_cbs(void) {
180 int xx;
181 tNFC_CONN_CB* p_conn_cb = &nfc_cb.conn_cb[0];
182 tNFC_DEACTIVATE_DEVT deact = tNFC_DEACTIVATE_DEVT();
183
184 deact.status = NFC_STATUS_NOT_INITIALIZED;
185 deact.type = NFC_DEACTIVATE_TYPE_IDLE;
186 deact.is_ntf = TRUE;
187 for (xx = 0; xx < NCI_MAX_CONN_CBS; xx++, p_conn_cb++) {
188 if (p_conn_cb->conn_id != NFC_ILLEGAL_CONN_ID) {
189 if (p_conn_cb->p_cback) {
190 tNFC_CONN nfc_conn;
191 nfc_conn.deactivate = deact;
192 (*p_conn_cb->p_cback)(p_conn_cb->conn_id, NFC_DEACTIVATE_CEVT,
193 &nfc_conn);
194 }
195 nfc_free_conn_cb(p_conn_cb);
196 }
197 }
198 }
199