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      1 /******************************************************************************
      2  *
      3  *  Copyright (C) 2010-2013 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)
     36 tLLCP_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 *******************************************************************************/
     49 void 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 *******************************************************************************/
    112 void 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 *******************************************************************************/
    143 void 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 *******************************************************************************/
    185 UINT8 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