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      1 /******************************************************************************
      2  *
      3  *  Copyright (C) 2010-2012 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 the main LLCP entry points
     22  *
     23  ******************************************************************************/
     24 
     25 #include <string.h>
     26 #include "gki.h"
     27 #include "nfc_target.h"
     28 #include "bt_types.h"
     29 #include "llcp_api.h"
     30 #include "llcp_int.h"
     31 #include "llcp_defs.h"
     32 #include "nfc_int.h"
     33 
     34 #if (LLCP_DYNAMIC_MEMORY == FALSE)
     35 tLLCP_CB llcp_cb;
     36 #endif
     37 
     38 /*******************************************************************************
     39 **
     40 ** Function         llcp_init
     41 **
     42 ** Description      This function is called once at startup to initialize
     43 **                  all the LLCP structures
     44 **
     45 ** Returns          void
     46 **
     47 *******************************************************************************/
     48 void llcp_init (void)
     49 {
     50     UINT32 pool_count;
     51 
     52     memset (&llcp_cb, 0, sizeof (tLLCP_CB));
     53 
     54     llcp_cb.trace_level = LLCP_INITIAL_TRACE_LEVEL;
     55 
     56     LLCP_TRACE_DEBUG0 ("LLCP - llcp_init ()");
     57 
     58     llcp_cb.lcb.local_link_miu = (LLCP_MIU <= LLCP_MAX_MIU ? LLCP_MIU : LLCP_MAX_MIU);
     59     llcp_cb.lcb.local_opt      = LLCP_OPT_VALUE;
     60     llcp_cb.lcb.local_wt       = LLCP_WAITING_TIME;
     61     llcp_cb.lcb.local_lto      = LLCP_LTO_VALUE;
     62 
     63     llcp_cb.lcb.inact_timeout_init   = LLCP_INIT_INACTIVITY_TIMEOUT;
     64     llcp_cb.lcb.inact_timeout_target = LLCP_TARGET_INACTIVITY_TIMEOUT;
     65     llcp_cb.lcb.symm_delay           = LLCP_DELAY_RESP_TIME;
     66     llcp_cb.lcb.data_link_timeout    = LLCP_DATA_LINK_CONNECTION_TOUT;
     67     llcp_cb.lcb.delay_first_pdu_timeout = LLCP_DELAY_TIME_TO_SEND_FIRST_PDU;
     68 
     69     llcp_cb.lcb.wks  = LLCP_WKS_MASK_LM;
     70 
     71     /* total number of buffers for LLCP */
     72     pool_count = GKI_poolcount (LLCP_POOL_ID);
     73 
     74     /* number of buffers for receiving data */
     75     llcp_cb.num_rx_buff = (pool_count * LLCP_RX_BUFF_RATIO) / 100;
     76 
     77     /* rx congestion start/end threshold */
     78     llcp_cb.overall_rx_congest_start = (UINT8) ((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_START) / 100);
     79     llcp_cb.overall_rx_congest_end   = (UINT8) ((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 = (UINT8) ((llcp_cb.num_rx_buff * LLCP_LL_RX_BUFF_LIMIT) / 100);
     83 
     84     LLCP_TRACE_DEBUG4 ("num_rx_buff = %d, rx_congest_start = %d, rx_congest_end = %d, max_num_ll_rx_buff = %d",
     85                         llcp_cb.num_rx_buff, llcp_cb.overall_rx_congest_start,
     86                         llcp_cb.overall_rx_congest_end, llcp_cb.max_num_ll_rx_buff);
     87 
     88     /* max number of buffers for transmitting data */
     89     llcp_cb.max_num_tx_buff    = (UINT8) (pool_count - llcp_cb.num_rx_buff);
     90 
     91     /* max number of buffers for transmitting data on logical data link */
     92     llcp_cb.max_num_ll_tx_buff = (UINT8) ((llcp_cb.max_num_tx_buff * LLCP_LL_TX_BUFF_LIMIT) / 100);
     93 
     94     LLCP_TRACE_DEBUG2 ("max_num_tx_buff = %d, max_num_ll_tx_buff = %d",
     95                         llcp_cb.max_num_tx_buff, llcp_cb.max_num_ll_tx_buff);
     96 
     97     llcp_cb.ll_tx_uncongest_ntf_start_sap = LLCP_SAP_SDP + 1;
     98 
     99     LLCP_RegisterServer (LLCP_SAP_SDP, LLCP_LINK_TYPE_DATA_LINK_CONNECTION, "urn:nfc:sn:sdp", llcp_sdp_proc_data);
    100 }
    101 
    102 /*******************************************************************************
    103 **
    104 ** Function         llcp_cleanup
    105 **
    106 ** Description      This function is called once at closing to clean up
    107 **
    108 ** Returns          void
    109 **
    110 *******************************************************************************/
    111 void llcp_cleanup (void)
    112 {
    113     UINT8 sap;
    114     tLLCP_APP_CB *p_app_cb;
    115 
    116     LLCP_TRACE_DEBUG0 ("LLCP - llcp_cleanup ()");
    117 
    118     for (sap = LLCP_SAP_SDP; sap < LLCP_NUM_SAPS; sap++)
    119     {
    120         p_app_cb = llcp_util_get_app_cb (sap);
    121 
    122         if (  (p_app_cb)
    123             &&(p_app_cb->p_app_cback)  )
    124         {
    125             LLCP_Deregister (sap);
    126         }
    127     }
    128 
    129     nfc_stop_quick_timer (&llcp_cb.lcb.inact_timer);
    130     nfc_stop_quick_timer (&llcp_cb.lcb.timer);
    131 }
    132 
    133 /*******************************************************************************
    134 **
    135 ** Function         llcp_process_timeout
    136 **
    137 ** Description      This function is called when an LLCP-related timeout occurs
    138 **
    139 ** Returns          void
    140 **
    141 *******************************************************************************/
    142 void llcp_process_timeout (TIMER_LIST_ENT *p_tle)
    143 {
    144     UINT8 reason;
    145 
    146     LLCP_TRACE_DEBUG1 ("llcp_process_timeout: event=%d", p_tle->event);
    147 
    148     switch (p_tle->event)
    149     {
    150     case NFC_TTYPE_LLCP_LINK_MANAGER:
    151         /* Link timeout or Symm timeout */
    152         llcp_link_process_link_timeout ();
    153         break;
    154 
    155     case NFC_TTYPE_LLCP_LINK_INACT:
    156         /* inactivity timeout */
    157         llcp_link_deactivate (LLCP_LINK_LOCAL_INITIATED);
    158         break;
    159 
    160     case NFC_TTYPE_LLCP_DATA_LINK:
    161         reason = LLCP_SAP_DISCONNECT_REASON_TIMEOUT;
    162         llcp_dlsm_execute ((tLLCP_DLCB *) (p_tle->param), LLCP_DLC_EVENT_TIMEOUT, &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 *******************************************************************************/
    184 UINT8 LLCP_SetTraceLevel (UINT8 new_level)
    185 {
    186     if (new_level != 0xFF)
    187         llcp_cb.trace_level = new_level;
    188 
    189     return (llcp_cb.trace_level);
    190 }
    191