1 /******************************************************************************
2 *
3 * Copyright (C) 2010-2014 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 the main LLCP entry points
22 *
23 ******************************************************************************/
24
25 #include <string.h>
26 #include "bt_types.h"
27 #include "gki.h"
28 #include "llcp_api.h"
29 #include "llcp_defs.h"
30 #include "llcp_int.h"
31 #include "nfc_int.h"
32 #include "nfc_target.h"
33
34 tLLCP_CB llcp_cb;
35
36 /*******************************************************************************
37 **
38 ** Function llcp_init
39 **
40 ** Description This function is called once at startup to initialize
41 ** all the LLCP structures
42 **
43 ** Returns void
44 **
45 *******************************************************************************/
llcp_init(void)46 void llcp_init(void) {
47 uint32_t pool_count;
48
49 memset(&llcp_cb, 0, sizeof(tLLCP_CB));
50
51 llcp_cb.trace_level = LLCP_INITIAL_TRACE_LEVEL;
52
53 LLCP_TRACE_DEBUG0("LLCP - llcp_init ()");
54
55 llcp_cb.lcb.local_link_miu =
56 (LLCP_MIU <= LLCP_MAX_MIU ? LLCP_MIU : LLCP_MAX_MIU);
57 llcp_cb.lcb.local_opt = LLCP_OPT_VALUE;
58 llcp_cb.lcb.local_wt = LLCP_WAITING_TIME;
59 llcp_cb.lcb.local_lto = LLCP_LTO_VALUE;
60
61 llcp_cb.lcb.inact_timeout_init = LLCP_INIT_INACTIVITY_TIMEOUT;
62 llcp_cb.lcb.inact_timeout_target = LLCP_TARGET_INACTIVITY_TIMEOUT;
63 llcp_cb.lcb.symm_delay = LLCP_DELAY_RESP_TIME;
64 llcp_cb.lcb.data_link_timeout = LLCP_DATA_LINK_CONNECTION_TOUT;
65 llcp_cb.lcb.delay_first_pdu_timeout = LLCP_DELAY_TIME_TO_SEND_FIRST_PDU;
66
67 llcp_cb.lcb.wks = LLCP_WKS_MASK_LM;
68
69 /* total number of buffers for LLCP */
70 pool_count = GKI_poolcount(LLCP_POOL_ID);
71
72 /* number of buffers for receiving data */
73 llcp_cb.num_rx_buff = (pool_count * LLCP_RX_BUFF_RATIO) / 100;
74
75 /* rx congestion start/end threshold */
76 llcp_cb.overall_rx_congest_start =
77 (uint8_t)((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_START) / 100);
78 llcp_cb.overall_rx_congest_end =
79 (uint8_t)((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_END) / 100);
80
81 /* max number of buffers for receiving data on logical data link */
82 llcp_cb.max_num_ll_rx_buff =
83 (uint8_t)((llcp_cb.num_rx_buff * LLCP_LL_RX_BUFF_LIMIT) / 100);
84
85 LLCP_TRACE_DEBUG4(
86 "num_rx_buff = %d, rx_congest_start = %d, rx_congest_end = %d, "
87 "max_num_ll_rx_buff = %d",
88 llcp_cb.num_rx_buff, llcp_cb.overall_rx_congest_start,
89 llcp_cb.overall_rx_congest_end, llcp_cb.max_num_ll_rx_buff);
90
91 /* max number of buffers for transmitting data */
92 llcp_cb.max_num_tx_buff = (uint8_t)(pool_count - llcp_cb.num_rx_buff);
93
94 /* max number of buffers for transmitting data on logical data link */
95 llcp_cb.max_num_ll_tx_buff =
96 (uint8_t)((llcp_cb.max_num_tx_buff * LLCP_LL_TX_BUFF_LIMIT) / 100);
97
98 LLCP_TRACE_DEBUG2("max_num_tx_buff = %d, max_num_ll_tx_buff = %d",
99 llcp_cb.max_num_tx_buff, llcp_cb.max_num_ll_tx_buff);
100
101 llcp_cb.ll_tx_uncongest_ntf_start_sap = LLCP_SAP_SDP + 1;
102
103 LLCP_RegisterServer(LLCP_SAP_SDP, LLCP_LINK_TYPE_DATA_LINK_CONNECTION,
104 "urn:nfc:sn:sdp", llcp_sdp_proc_data);
105 }
106
107 /*******************************************************************************
108 **
109 ** Function llcp_cleanup
110 **
111 ** Description This function is called once at closing to clean up
112 **
113 ** Returns void
114 **
115 *******************************************************************************/
llcp_cleanup(void)116 void llcp_cleanup(void) {
117 uint8_t sap;
118 tLLCP_APP_CB* p_app_cb;
119
120 LLCP_TRACE_DEBUG0("LLCP - llcp_cleanup ()");
121
122 for (sap = LLCP_SAP_SDP; sap < LLCP_NUM_SAPS; sap++) {
123 p_app_cb = llcp_util_get_app_cb(sap);
124
125 if ((p_app_cb) && (p_app_cb->p_app_cback)) {
126 LLCP_Deregister(sap);
127 }
128 }
129
130 nfc_stop_quick_timer(&llcp_cb.lcb.inact_timer);
131 nfc_stop_quick_timer(&llcp_cb.lcb.timer);
132 }
133
134 /*******************************************************************************
135 **
136 ** Function llcp_process_timeout
137 **
138 ** Description This function is called when an LLCP-related timeout occurs
139 **
140 ** Returns void
141 **
142 *******************************************************************************/
llcp_process_timeout(TIMER_LIST_ENT * p_tle)143 void llcp_process_timeout(TIMER_LIST_ENT* p_tle) {
144 uint8_t reason;
145
146 LLCP_TRACE_DEBUG1("llcp_process_timeout: event=%d", p_tle->event);
147
148 switch (p_tle->event) {
149 case NFC_TTYPE_LLCP_LINK_MANAGER:
150 /* Link timeout or Symm timeout */
151 llcp_link_process_link_timeout();
152 break;
153
154 case NFC_TTYPE_LLCP_LINK_INACT:
155 /* inactivity timeout */
156 llcp_link_deactivate(LLCP_LINK_LOCAL_INITIATED);
157 break;
158
159 case NFC_TTYPE_LLCP_DATA_LINK:
160 reason = LLCP_SAP_DISCONNECT_REASON_TIMEOUT;
161 llcp_dlsm_execute((tLLCP_DLCB*)(p_tle->param), LLCP_DLC_EVENT_TIMEOUT,
162 &reason);
163 break;
164
165 case NFC_TTYPE_LLCP_DELAY_FIRST_PDU:
166 llcp_link_check_send_data();
167 break;
168
169 default:
170 break;
171 }
172 }
173
174 /*******************************************************************************
175 **
176 ** Function LLCP_SetTraceLevel
177 **
178 ** Description This function sets the trace level for LLCP. If called with
179 ** a value of 0xFF, it simply returns the current trace level.
180 **
181 ** Returns The new or current trace level
182 **
183 *******************************************************************************/
LLCP_SetTraceLevel(uint8_t new_level)184 uint8_t LLCP_SetTraceLevel(uint8_t new_level) {
185 if (new_level != 0xFF) llcp_cb.trace_level = new_level;
186
187 return (llcp_cb.trace_level);
188 }
189