view src/g23m-gprs/llc/llc_llmep.c @ 597:f18b29e27be5

First attempt at MCSI voice path automatic switching The function is implemented at the ACI level in both aci2 and aci3, successfully avoids triggering the DSP bug on the first call, but the shutdown of MCSI upon call completion is not working properly yet in either version.
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Mar 2019 22:18:35 +0000
parents 219afcfc6250
children
line wrap: on
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/* 
+----------------------------------------------------------------------------- 
|  Project :  
|  Modul   :  
+----------------------------------------------------------------------------- 
|  Copyright 2002 Texas Instruments Berlin, AG 
|                 All rights reserved. 
| 
|                 This file is confidential and a trade secret of Texas 
|                 Instruments Berlin, AG 
|                 The receipt of or possession of this file does not convey 
|                 any rights to reproduce or disclose its contents or to 
|                 manufacture, use, or sell anything it may describe, in 
|                 whole, or in part, without the specific written consent of 
|                 Texas Instruments Berlin, AG. 
+----------------------------------------------------------------------------- 
|  Purpose :  This modul is part of the entity LLC and implements all 
|             functions to handles the incoming primitives as described in 
|             the SDL-documentation (LLME-statemachine)
+----------------------------------------------------------------------------- 
*/ 

#ifndef LLC_LLMEP_C
#define LLC_LLMEP_C
#endif

#define ENTITY_LLC

/*==== INCLUDES =============================================================*/

#include "typedefs.h"   /* to get Condat data types */
#include "vsi.h"        /* to get a lot of macros */
#include "macdef.h"
#include "gprs.h"
#include "gsm.h"        /* to get a lot of macros */
#include "cnf_llc.h"    /* to get cnf-definitions */
#include "mon_llc.h"    /* to get mon-definitions */
#include "prim.h"       /* to get the definitions of used SAP and directions */
#include "llc.h"        /* to get the global entity definitions */

#include "llc_f.h"      /* to get global functions, e.g. llc_init_parameters */
#include "llc_llmef.h"  /* to get local LLME functions */
#include "llc_us.h"     /* to get signal interface to U */
#include "llc_itxs.h"   /* to get signal interface to ITX */
#include "llc_irxs.h"   /* to get signal interface to IRX */
#include "llc_uitxs.h"  /* to get signal interface to UITX */
#include "llc_uirxs.h"  /* to get signal interface to UIRX */
#include "llc_t200s.h"  /* to get signal interface to T200 */
#include "llc_txs.h"    /* to get signal interface to TX */
#include "llc_rxs.h"    /* to get signal interface to RX */

/*==== CONST ================================================================*/

/*==== LOCAL VARS ===========================================================*/

/*==== PRIVATE FUNCTIONS ====================================================*/

/*==== PUBLIC FUNCTIONS =====================================================*/



/*
+------------------------------------------------------------------------------
| Function    : llme_llgmm_assign_req
+------------------------------------------------------------------------------
| Description : Handles the primitive LLGMM_ASSIGN_REQ
|
| Parameters  : *llgmm_assign_req - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void llme_llgmm_assign_req ( T_LLGMM_ASSIGN_REQ *llgmm_assign_req )
{
  T_SAPI sapi;


  TRACE_FUNCTION( "llme_llgmm_assign_req" );
  
  switch( GET_STATE( LLME ) )
  {
    case LLME_TLLI_UNASSIGNED:
      /*
       * ATTENTION: Every ASSIGN_REQ primitive must contain a valid new_tlli
       * when LLC is unassigned, otherwise it should be a protocol error...?
       * Therefore this check could be omitted.
       */
#ifdef LL_2to1
      if (llgmm_assign_req->new_tlli == PS_TLLI_INVALID)
#else
      if (llgmm_assign_req->new_tlli == LLGMM_TLLI_INVALID)
#endif
      {
        PFREE (llgmm_assign_req);
        TRACE_ERROR ("LLME in state TLLI_UNASSIGNED and new_tlli is invalid!");
      }
      else /* LLGMM_TLLI_VALID */
      {
        TRACE_1_INFO("TLLI 0x%.8X assigned", llgmm_assign_req->new_tlli);

        llc_data->tlli_new = llgmm_assign_req->new_tlli;
        llc_data->tlli_old = llgmm_assign_req->old_tlli;

        llme_init_cipher (llgmm_assign_req->llgmm_kc, 
          llgmm_assign_req->ciphering_algorithm);

        PFREE (llgmm_assign_req);

        /*
         * Initialises the LLC layer parameters.
         * NOTE: IOV-UI and IOV-I[] are initialised the second time with this
         * function call because they were already set in llme_init_cipher().
         */
        llc_init_parameters();

        /*
         * Label ASSIGN
         */

        SET_STATE (LLME, LLME_TLLI_ASSIGNED);

        /*
         * ATTENTION:
         * The following loop implies that all SAPIs are odd numbers beginning
         * with 1!
         */
#ifdef LL_2to1
        for (sapi = PS_SAPI_1; sapi <= PS_SAPI_11; sapi += 2)
#else
        for (sapi = LL_SAPI_1; sapi <= LL_SAPI_11; sapi += 2)
#endif
        {
          SWITCH_LLC (sapi);

          sig_llme_u_assign_req();
          sig_llme_uitx_assign_req();
          sig_llme_uirx_assign_req();
          sig_llme_t200_assign_req();

#ifdef LL_2to1
          if ((sapi != PS_SAPI_1) && (sapi != PS_SAPI_7))
#else
          if ((sapi != LL_SAPI_1) && (sapi != LL_SAPI_7))
#endif
          {
            sig_llme_itx_assign_req();
            sig_llme_irx_assign_req();
          }
        }

        sig_llme_rx_assign_req();
        sig_llme_tx_assign_req();

        llc_init_requested_xid();
      }
      break;

    case LLME_TLLI_ASSIGNED_SUSPENDED:
      /* 
       * No break
       */
    case LLME_TLLI_ASSIGNED:
      llc_data->tlli_new = llgmm_assign_req->new_tlli;
      llc_data->tlli_old = llgmm_assign_req->old_tlli;

      llme_init_cipher (llgmm_assign_req->llgmm_kc,
                        llgmm_assign_req->ciphering_algorithm);

#ifdef LL_2to1
      if (llgmm_assign_req->new_tlli EQ PS_TLLI_INVALID)
#else
      if (llgmm_assign_req->new_tlli EQ LLGMM_TLLI_INVALID)
#endif
      {
        TRACE_0_INFO("TLLI unassigned");

        /*
         * Label UNASSIGN
         */

        SET_STATE (LLME, LLME_TLLI_UNASSIGNED);

        /*
         * ATTENTION:
         * The following loop implies that all SAPIs are odd numbers beginning
         * with 1!
         */
#ifdef LL_2to1
        for (sapi = PS_SAPI_1; sapi <= PS_SAPI_11; sapi += 2)
#else
        for (sapi = LL_SAPI_1; sapi <= LL_SAPI_11; sapi += 2)
#endif
        {
          SWITCH_LLC (sapi);

          sig_llme_u_unassign_req();
          sig_llme_uitx_unassign_req();
          sig_llme_uirx_unassign_req();
          sig_llme_t200_unassign_req();

          if ((sapi != LL_SAPI_1) && (sapi != LL_SAPI_7))
          {
            sig_llme_itx_unassign_req();
            sig_llme_irx_unassign_req();
          }
        }

        sig_llme_rx_unassign_req();
        sig_llme_tx_unassign_req();

        /*
         * Clear suspended mode with unassign.
         */
        llc_data->suspended = FALSE;

        /*
         * In case we have suspended GRLC we have to resume GRLC to 
         * 'normal operation'
         */
        if (llc_data->grlc_suspended == TRUE)
        {
          /*
           * Resume TX operation and indicate, that GRLC was suspened.
           */
          sig_llme_tx_resume_req (llc_data->grlc_suspended);

          llc_data->grlc_suspended = FALSE;

        /*  {
            PALLOC (grr_resume_req, GRR_RESUME_REQ);
            PSEND (hCommGRR, grr_resume_req);
          }*/
        }

        PFREE (llgmm_assign_req);
      }
      else /* LLGMM_TLLI_VALID */
      {
        TRACE_1_INFO("TLLI 0x%.8X (re-)assigned", llgmm_assign_req->new_tlli);
        PFREE (llgmm_assign_req);
      }
      break;

    default:
      PFREE (llgmm_assign_req);
      TRACE_ERROR( "LLGMM_ASSIGN_REQ unexpected" );
      break;
  }

} /* llme_llgmm_assign_req() */



/*
+------------------------------------------------------------------------------
| Function    : llme_llgmm_trigger_req
+------------------------------------------------------------------------------
| Description : Handles the primitive LLGMM_TRIGGER_REQ
|
| Parameters  : *llgmm_trigger_req - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void llme_llgmm_trigger_req ( T_LLGMM_TRIGGER_REQ *llgmm_trigger_req )
{ 
  TRACE_FUNCTION( "llme_llgmm_trigger_req" );
  
  switch( GET_STATE( LLME ) )
  {
    case LLME_TLLI_ASSIGNED:
      /* No break. */
    case LLME_TLLI_ASSIGNED_SUSPENDED:
      /*
       * Switch LLC to SAPI 1 in case TX forwards the trigger request to UITX.
       */
      SWITCH_LLC (LL_SAPI_1);

      sig_llme_tx_trigger_req (llgmm_trigger_req->trigger_cause);

      PFREE (llgmm_trigger_req);
      break;
    default:
      PFREE (llgmm_trigger_req);
      TRACE_ERROR( "LLGMM_TRIGGER_REQ unexpected" );
      break;
  }

} /* llme_llgmm_trigger_req() */



/*
+------------------------------------------------------------------------------
| Function    : llme_llgmm_suspend_req
+------------------------------------------------------------------------------
| Description : Handles the primitive LLGMM_SUSPEND_REQ
|
| Parameters  : *llgmm_suspend_req - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void llme_llgmm_suspend_req ( T_LLGMM_SUSPEND_REQ *llgmm_suspend_req )
{ 
  T_SAPI sapi;

  
  TRACE_FUNCTION( "llme_llgmm_suspend_req" );

  TRACE_1_PARA("cause:%d", llgmm_suspend_req->susp_cause );
  
  switch( GET_STATE( LLME ) )
  {
    case LLME_TLLI_ASSIGNED:
      TRACE_0_INFO("LLC suspended");

      /*
       * Set global suspended indicator for the other services.
       */
      llc_data->suspended = TRUE;

      SET_STATE (LLME, LLME_TLLI_ASSIGNED_SUSPENDED);

      /*
       * ATTENTION:
       * The following loop implies that all the relevant SAPIs are the odd 
       * numbers from 3 to 11 (except 7)
       */
      for (sapi = LL_SAPI_3; sapi <= LL_SAPI_11; sapi += 2)
      {
        SWITCH_LLC (sapi);

        if (sapi != LL_SAPI_7)
        {
          sig_llme_itx_suspend_req();
        }
      }

      /*
       * No break!
       */
    case LLME_TLLI_ASSIGNED_SUSPENDED:
      /*
       * In case of RAU suspend GRLC if not already done
       */
      if ( (llc_data->grlc_suspended == FALSE)           AND 
           (llgmm_suspend_req->susp_cause == LLGMM_RAU)   )
      {
        sig_llme_tx_suspend_req ();

        llc_data->grlc_suspended = TRUE;

        {
          PALLOC (grlc_activate_gmm_queue_req, GRLC_ACTIVATE_GMM_QUEUE_REQ);
          PSEND (hCommGRLC, grlc_activate_gmm_queue_req);
        }
      }

      break;
  
    default:
      TRACE_ERROR( "LLGMM_SUSPEND_REQ unexpected" );
      break;
  
  }
  if ( (llgmm_suspend_req->susp_cause == LLGMM_LIMITED) OR
           (llgmm_suspend_req->susp_cause == LLGMM_NO_GPRS_SERVICE))
      /* init current values */
#ifdef REL99
      llc_data->cur_pfi          = LL_PFI_SIGNALING; 
#endif
      llc_data->cur_qos.delay    = LL_DELAY_SUB;
      llc_data->cur_qos.relclass = LL_NO_REL;
      llc_data->cur_qos.peak     = LL_PEAK_SUB;
      llc_data->cur_qos.preced   = LL_PRECED_SUB;
      llc_data->cur_qos.mean     = LL_MEAN_SUB;
      llc_data->cur_radio_prio   = LL_RADIO_PRIO_1;  
  PFREE (llgmm_suspend_req);

} /* llme_llgmm_suspend_req() */



/*
+------------------------------------------------------------------------------
| Function    : llme_llgmm_resume_req
+------------------------------------------------------------------------------
| Description : Handles the primitive LLGMM_RESUME_REQ
|
| Parameters  : *llgmm_resume_req - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void llme_llgmm_resume_req ( T_LLGMM_RESUME_REQ *llgmm_resume_req )
{ 
  T_SAPI sapi;

  
  TRACE_FUNCTION( "llme_llgmm_resume_req" );
  
  switch( GET_STATE( LLME ) )
  {
    case LLME_TLLI_ASSIGNED_SUSPENDED:
      TRACE_0_INFO("LLC resumed");

      /*
       * Clear global suspended indicator for the other services.
       */
      llc_data->suspended = FALSE;

      SET_STATE (LLME, LLME_TLLI_ASSIGNED);

      /*
       * FIRST! indicate to TX that we resume normal operation and 
       * that LLC/GRLC flow control should be reseted in case GRLC was 
       * suspened.
       */
      sig_llme_tx_resume_req (llc_data->grlc_suspended);

      /*
       * Reset GRLC, if suspended, to 'normal operation'
       */
      if (llc_data->grlc_suspended == TRUE)
      {
       /* PALLOC (grr_resume_req, GRR_RESUME_REQ);
        PSEND (hCommGRR, grr_resume_req);*/

        llc_data->grlc_suspended = FALSE;
      }

      /*
       * ATTENTION:
       * The following loop implies that all the relevant SAPIs are the odd 
       * numbers from 3 to 11 (except 7)
       */
      for (sapi = LL_SAPI_3; sapi <= LL_SAPI_11; sapi += 2)
      {
        SWITCH_LLC (sapi);

        if (sapi != LL_SAPI_7)
        {
          sig_llme_itx_resume_req();
        }
      }
      break;
  
    default:
      TRACE_ERROR( "LLGMM_RESUME_REQ unexpected" );
      break;
  }

  PFREE (llgmm_resume_req);

} /* llme_llgmm_resume_req() */