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 *
22 *  This file contains the main LLCP entry points
23 *
24 ******************************************************************************/
25
26#include <string.h>
27#include "gki.h"
28#include "nfc_target.h"
29#include "bt_types.h"
30#include "llcp_api.h"
31#include "llcp_int.h"
32#include "llcp_defs.h"
33#include "nfc_int.h"
34
35#if (LLCP_DYNAMIC_MEMORY == FALSE)
36tLLCP_CB llcp_cb;
37#endif
38
39/*******************************************************************************
40**
41** Function         llcp_init
42**
43** Description      This function is called once at startup to initialize
44**                  all the LLCP structures
45**
46** Returns          void
47**
48*******************************************************************************/
49void llcp_init (void)
50{
51    UINT32 pool_count;
52
53    memset (&llcp_cb, 0, sizeof (tLLCP_CB));
54
55    llcp_cb.trace_level = LLCP_INITIAL_TRACE_LEVEL;
56
57    LLCP_TRACE_DEBUG0 ("LLCP - llcp_init ()");
58
59    llcp_cb.lcb.local_link_miu = (LLCP_MIU <= LLCP_MAX_MIU ? LLCP_MIU : LLCP_MAX_MIU);
60    llcp_cb.lcb.local_opt      = LLCP_OPT_VALUE;
61    llcp_cb.lcb.local_wt       = LLCP_WAITING_TIME;
62    llcp_cb.lcb.local_lto      = LLCP_LTO_VALUE;
63
64    llcp_cb.lcb.inact_timeout_init   = LLCP_INIT_INACTIVITY_TIMEOUT;
65    llcp_cb.lcb.inact_timeout_target = LLCP_TARGET_INACTIVITY_TIMEOUT;
66    llcp_cb.lcb.symm_delay           = LLCP_DELAY_RESP_TIME;
67    llcp_cb.lcb.data_link_timeout    = LLCP_DATA_LINK_CONNECTION_TOUT;
68    llcp_cb.lcb.delay_first_pdu_timeout = LLCP_DELAY_TIME_TO_SEND_FIRST_PDU;
69
70    llcp_cb.lcb.wks  = LLCP_WKS_MASK_LM;
71
72    /* total number of buffers for LLCP */
73    pool_count = GKI_poolcount (LLCP_POOL_ID);
74
75    /* number of buffers for receiving data */
76    llcp_cb.num_rx_buff = (pool_count * LLCP_RX_BUFF_RATIO) / 100;
77
78    /* rx congestion start/end threshold */
79    llcp_cb.overall_rx_congest_start = (UINT8) ((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_START) / 100);
80    llcp_cb.overall_rx_congest_end   = (UINT8) ((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_END) / 100);
81
82    /* max number of buffers for receiving data on logical data link */
83    llcp_cb.max_num_ll_rx_buff = (UINT8) ((llcp_cb.num_rx_buff * LLCP_LL_RX_BUFF_LIMIT) / 100);
84
85    LLCP_TRACE_DEBUG4 ("num_rx_buff = %d, rx_congest_start = %d, rx_congest_end = %d, max_num_ll_rx_buff = %d",
86                        llcp_cb.num_rx_buff, llcp_cb.overall_rx_congest_start,
87                        llcp_cb.overall_rx_congest_end, llcp_cb.max_num_ll_rx_buff);
88
89    /* max number of buffers for transmitting data */
90    llcp_cb.max_num_tx_buff    = (UINT8) (pool_count - llcp_cb.num_rx_buff);
91
92    /* max number of buffers for transmitting data on logical data link */
93    llcp_cb.max_num_ll_tx_buff = (UINT8) ((llcp_cb.max_num_tx_buff * LLCP_LL_TX_BUFF_LIMIT) / 100);
94
95    LLCP_TRACE_DEBUG2 ("max_num_tx_buff = %d, max_num_ll_tx_buff = %d",
96                        llcp_cb.max_num_tx_buff, llcp_cb.max_num_ll_tx_buff);
97
98    llcp_cb.ll_tx_uncongest_ntf_start_sap = LLCP_SAP_SDP + 1;
99
100    LLCP_RegisterServer (LLCP_SAP_SDP, LLCP_LINK_TYPE_DATA_LINK_CONNECTION, "urn:nfc:sn:sdp", llcp_sdp_proc_data);
101}
102
103/*******************************************************************************
104**
105** Function         llcp_cleanup
106**
107** Description      This function is called once at closing to clean up
108**
109** Returns          void
110**
111*******************************************************************************/
112void llcp_cleanup (void)
113{
114    UINT8 sap;
115    tLLCP_APP_CB *p_app_cb;
116
117    LLCP_TRACE_DEBUG0 ("LLCP - llcp_cleanup ()");
118
119    for (sap = LLCP_SAP_SDP; sap < LLCP_NUM_SAPS; sap++)
120    {
121        p_app_cb = llcp_util_get_app_cb (sap);
122
123        if (  (p_app_cb)
124            &&(p_app_cb->p_app_cback)  )
125        {
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*******************************************************************************/
143void llcp_process_timeout (TIMER_LIST_ENT *p_tle)
144{
145    UINT8 reason;
146
147    LLCP_TRACE_DEBUG1 ("llcp_process_timeout: event=%d", p_tle->event);
148
149    switch (p_tle->event)
150    {
151    case NFC_TTYPE_LLCP_LINK_MANAGER:
152        /* Link timeout or Symm timeout */
153        llcp_link_process_link_timeout ();
154        break;
155
156    case NFC_TTYPE_LLCP_LINK_INACT:
157        /* inactivity timeout */
158        llcp_link_deactivate (LLCP_LINK_LOCAL_INITIATED);
159        break;
160
161    case NFC_TTYPE_LLCP_DATA_LINK:
162        reason = LLCP_SAP_DISCONNECT_REASON_TIMEOUT;
163        llcp_dlsm_execute ((tLLCP_DLCB *) (p_tle->param), LLCP_DLC_EVENT_TIMEOUT, &reason);
164        break;
165
166    case NFC_TTYPE_LLCP_DELAY_FIRST_PDU:
167        llcp_link_check_send_data ();
168        break;
169
170    default:
171        break;
172    }
173}
174
175/*******************************************************************************
176**
177** Function         LLCP_SetTraceLevel
178**
179** Description      This function sets the trace level for LLCP.  If called with
180**                  a value of 0xFF, it simply returns the current trace level.
181**
182** Returns          The new or current trace level
183**
184*******************************************************************************/
185UINT8 LLCP_SetTraceLevel (UINT8 new_level)
186{
187    if (new_level != 0xFF)
188        llcp_cb.trace_level = new_level;
189
190    return (llcp_cb.trace_level);
191}
192