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view src/g23m-aci/aci/ati_io.c @ 220:0ed36de51973

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ABB semaphore protection overhaul The ABB semaphone protection logic that came with TCS211 from TI was broken in several ways: * Some semaphore-protected functions were called from Application_Initialize() context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with NU_INVALID_SUSPEND in this context, but the return value wasn't checked, and NU_Release_Semaphore() would be called unconditionally at the end. The latter call would increment the semaphore count past 1, making the semaphore no longer binary and thus no longer effective for resource protection. The fix is to check the return value from NU_Obtain_Semaphore() and skip the NU_Release_Semaphore() call if the semaphore wasn't properly obtained. * Some SPI hardware manipulation was being done before entering the semaphore- protected critical section. The fix is to reorder the code: first obtain the semaphore, then do everything else. * In the corner case of L1/DSP recovery, l1_abb_power_on() would call some non-semaphore-protected ABB & SPI init functions. The fix is to skip those calls in the case of recovery. * A few additional corner cases existed, all of which are fixed by making ABB semaphore protection 100% consistent for all ABB functions and code paths. There is still one remaining problem of priority inversion: suppose a low- priority task calls an ABB function, and some medium-priority task just happens to preempt right in the middle of that semaphore-protected ABB operation. Then the high-priority SPI task is locked out for a non-deterministic time until that medium-priority task finishes its work and goes back to sleep. This priority inversion problem remains outstanding for now.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Apr 2021 20:55:25 +0000
parents fa8dc04885d8
children
line wrap: on
line source

/* 
+----------------------------------------------------------------------------- 
|  Project :  GSM-F&D (8411)
|  Modul   :  ATI
+----------------------------------------------------------------------------- 
|  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 :  
+----------------------------------------------------------------------------- 
*/ 

#ifndef ATI_IO_C
#define ATI_IO_C

#undef DUMMY_ATI_STRINGS

#include "aci_all.h"
#include "aci.h"
#ifdef UART
#include "dti.h"      /* functionality of the dti library */
#endif
#include "aci_cmh.h"
#include "ati_cmd.h"
#include "aci_io.h"
#include "aci_cmd.h"
#include "l4_tim.h"

#include "aci_lst.h"

#ifdef UART
#include "dti_conn_mng.h"
#include "psa_uart.h"
#include "cmh_uart.h"
#endif

#include "ati_io.h"
#include "aci_mem.h"
#include "aci_fd.h"
#include "psa.h"
#include "cmh.h"

#include "cmh_cc.h"
#include "psa_cc.h"

#include "ati_int.h"

#if !defined (STRACE_LEN)
  #define STRACE_LEN 80
#endif

#define LIST_MAX_LENGTH 30

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_CMD            |
| STATE   : code                        ROUTINE : io_SendMessage     |
+--------------------------------------------------------------------+

  PURPOSE :
*/

GLOBAL void io_sendMessage(UBYTE srcId, CHAR *msg,
                           T_ATI_OUTPUT_TYPE output_type)
{
  T_ATI_SRC_PARAMS *src_params;

  src_params = find_element (ati_src_list, srcId, search_ati_src_id);
  if (src_params EQ NULL)
  {
    TRACE_EVENT_P1 ("[ERR] io_sendMessage: srcId=%d not found", srcId);
    return;
  }
  if (IS_INDICATION_OUTPUT (output_type))
  {
    io_sendIndication(srcId, msg, output_type);
    return;
  }
  else if (!IS_ECHO_OUTPUT ( output_type))   /* ECHO_OUTPUT must not be terminated      */
  {                                          /*  with CRLF, see definition in ati_cmh.h */
    output_type |= ATI_END_CRLF_OUTPUT;
  }

  if (src_params->result_cb NEQ NULL)
  {
    src_params->result_cb (srcId, output_type,
                           (UBYTE*)msg, (USHORT)strlen (msg));
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_sendMessage: no result callback srcId=%d",
                    srcId);

    if ( (strlen (msg)) >= STRACE_LEN )
    {
      /* terminate traced string if too long */
      msg[STRACE_LEN-1] = '\0';
    }

    TRACE_EVENT_P1 ("%s", msg);
  }
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_CMD            |
| STATE   : code                        ROUTINE : io_SendMessageEx   |
+--------------------------------------------------------------------+

  PURPOSE :
*/

GLOBAL BOOL check_should_buffer_ind(T_ATI_SRC_PARAMS *src_params)
{  

  switch(src_params->buff_uns_mode)
  {
  case(NO_BUFF):
    break;

  case(BUFF_TYPING):
    if(src_params->cmd_state EQ CMD_TYPING)
    {
      TRACE_EVENT("check_should_buffer_ind(): cmd_state EQ CMD_TYPING");
      return(TRUE);
    }   
    break;

  case(BUFF_RUNNING):
    if(src_params->cmd_state NEQ CMD_IDLE )
    {
      TRACE_EVENT("check_should_buffer_ind(): cmd_state NEQ CMD_IDLE");
      return(TRUE);
    } 
    break;
  }
  return(FALSE); 
}

LOCAL void buffer_indication( T_ATI_SRC_PARAMS *src_params, 
                              CHAR *msg, 
                              T_ATI_OUTPUT_TYPE output_type )
{
  T_ATI_INDIC_BUFF *buff_indic_elem;
  CHAR *output;

  if(src_params->indication_buffer EQ NULL)
  {
    src_params->indication_buffer = new_list ();
  }
  
  ACI_MALLOC(output, (USHORT)(strlen(msg)+1));
  memcpy(output, msg, (USHORT)(strlen(msg)+1));

  ACI_MALLOC( buff_indic_elem, sizeof(T_ATI_INDIC_BUFF) );
  buff_indic_elem->output = output;
  buff_indic_elem->output_type = output_type;
  /* if list count is the maximum then the available elements are reused*/
  if(get_list_count(src_params->indication_buffer) >= LIST_MAX_LENGTH)
  {
    insert_shift_list(src_params->indication_buffer, buff_indic_elem);
  }
  else
  {
    insert_list( src_params->indication_buffer, buff_indic_elem);
  }

  if ( (strlen (msg)) >= STRACE_LEN )
  {
    /* terminate traced string if too long */
    msg[STRACE_LEN-1] = '\0';
  }

  TRACE_EVENT_P2("buffering on src %d: %s", src_params->src_id, msg);
}

GLOBAL void io_sendMessageEx (UBYTE srcId, CHAR *msg,
                             T_ATI_OUTPUT_TYPE output_type)
{
  T_ATI_SRC_PARAMS *src_params;

  src_params = find_element (ati_src_list, srcId, search_ati_src_id);
  if (src_params EQ NULL)
  {
    TRACE_EVENT_P1 ("[ERR] io_sendMessageEx: srcId=%d not found", srcId);
    return;
  }

  /*
   *  ATQ suppesses intermidiate, final and unsolicited result codes.
   *  Only information text in responce to commands is not affected.
   */
  if(IS_CONFIRM_OUTPUT(output_type))
  {
    io_setCommandState(src_params, ATI_LINE_STATE_END);
  }
  
  if (ati_user_output_cfg[srcId].atQ)
  {
    if(! IS_NORMAL_OUTPUT(output_type) AND ! IS_ECHO_OUTPUT(output_type))
    {
      return;
    }
  }
  
if ( IS_INDICATION_OUTPUT (output_type)
    AND check_should_buffer_ind(src_params) )
  {
    buffer_indication( src_params, msg, output_type );
    return;
  }

  if (src_params->result_cb NEQ NULL)
  {
    src_params->result_cb (srcId, output_type,
                           (UBYTE*)msg, (USHORT)strlen (msg));
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_sendMessageEx: no result callback srcId=%d",
                    srcId);

    if ( (strlen (msg)) >= STRACE_LEN )
    {
      /* terminate traced string if too long */
      msg[STRACE_LEN-1] = '\0';
    }

    TRACE_EVENT_P1 ("%s", msg);
  }
}

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_CMD            |
| STATE   : code                        ROUTINE : io_SendIndication  |
+--------------------------------------------------------------------+

  PURPOSE :
*/

GLOBAL void io_sendIndication(UBYTE srcId, CHAR *msg,
                              T_ATI_OUTPUT_TYPE output_type)
{
  T_ATI_SRC_PARAMS *src_params = find_element (ati_src_list, srcId, search_ati_src_id);
    
  if (src_params EQ NULL)
  {
    TRACE_EVENT_P1 ("[ERR] io_sendIndication: srcId=%d not found", srcId);
    return;
  }

  /*
   *  ATQ suppesses intermidiate, final and unsolicited result codes.
   *  Only information text in responce to commands is not affected.
   */
  if (ati_user_output_cfg[srcId].atQ)
  {
    return;
  }

  output_type |= ATI_INDICATION_OUTPUT | 
                 ATI_BEGIN_CRLF_OUTPUT | 
                 ATI_END_CRLF_OUTPUT;

  if ( check_should_buffer_ind(src_params) )
  {
    buffer_indication( src_params, msg, output_type );
    return;
  }
  if (src_params->result_cb NEQ NULL)
  {
    src_params->result_cb (srcId, output_type,
                           (UBYTE*)msg, (USHORT)strlen (msg));
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_sendIndication: no result callback srcId=%d",
                    srcId);

    if ( (strlen (msg)) >= STRACE_LEN )
    {
      /* terminate traced string if too long */
      msg[STRACE_LEN-1] = '\0';
    }

    TRACE_EVENT_P1 ("%s", msg);
  }
}



/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_CMD            |
| STATE   : code                        ROUTINE : io_sendConfirm     |
+--------------------------------------------------------------------+

  PURPOSE : output to AT interface
*/

GLOBAL void send_buffered_indication( T_ATI_SRC_PARAMS *src_params )
{
  BOOL            go_on = TRUE;
  T_ATI_INDIC_BUFF *indic = src_params->indication_buffer; /* to be sure it's not NULL */

  TRACE_EVENT_P1("send buffered indications for source: %d", src_params->src_id);
  while( go_on )
  {
    indic = remove_first_element( src_params->indication_buffer ); 

    if( indic NEQ NULL )
    {
      io_sendIndication( src_params->src_id,
                         indic->output,
                         indic->output_type );
      ACI_MFREE( indic->output );
      ACI_MFREE( indic );    
    }
    else
    {
      ACI_MFREE( src_params->indication_buffer );
      src_params->indication_buffer = NULL;
      go_on = FALSE;
    }
  }
}
                                       
GLOBAL void io_sendConfirm(UBYTE srcId, CHAR *msg,
                           T_ATI_OUTPUT_TYPE output_type)
{
  BOOL is_CONNECT = FALSE;
  T_ATI_SRC_PARAMS *src_params = find_element (ati_src_list, srcId, search_ati_src_id);

  TRACE_FUNCTION("io_sendConfirm()");

  if (src_params EQ NULL)
  {
    TRACE_EVENT_P1 ("[ERR] io_sendConfirm: srcId=%d not found", srcId);
    return;
  }

  if (BITFIELD_CHECK (output_type, ATI_CONNECT_OUTPUT))
  {
    is_CONNECT = TRUE;
    BITFIELD_CLEAR (output_type, ATI_CONNECT_OUTPUT);/*lint !e64 (Warning: type mismatch)*/
  }

  output_type |= ATI_CONFIRM_OUTPUT    | 
                 ATI_BEGIN_CRLF_OUTPUT | 
                 ATI_END_CRLF_OUTPUT;

  if (src_params->result_cb NEQ NULL)
  {
    /*
     *  ATQ suppesses intermidiate, final and unsolicited result codes.
     *  Only information text in responce to commands is not affected.
     */
    if (ati_user_output_cfg[srcId].atQ EQ 0)
    {
      src_params->result_cb (srcId, output_type,
                             (UBYTE*)msg, (USHORT)strlen (msg));
    }
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_sendConfirm: no result callback srcId=%d",
                    srcId);

    if ( (strlen (msg)) >= STRACE_LEN )
    {
      /* terminate traced string if too long */
      msg[STRACE_LEN-1] = '\0';
    }

    TRACE_EVENT_P1 ("%s", msg);
  }

  io_setCommandState(src_params, ATI_LINE_STATE_END);
  trace_cmd_state(src_params->src_id, src_params->cmd_state, CMD_IDLE);
  src_params->cmd_state = CMD_IDLE;

  if ((src_params->indication_buffer NEQ NULL) /* send buffered indications */
    AND (is_CONNECT EQ FALSE))                  /* but for data call not yet --> when back in CMD mode */
  {
    send_buffered_indication( src_params );
  }
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : CMH_DTIS                |
|                                 ROUTINE : io_sendChar             |
+-------------------------------------------------------------------+

  PURPOSE : send one character through DTI
*/

GLOBAL void io_sendChar (CHAR out, UBYTE srcId)
{
  T_ATI_SRC_PARAMS *src_params;

  src_params = find_element (ati_src_list, srcId, search_ati_src_id);
  if (src_params EQ NULL)
  {
    TRACE_EVENT_P1 ("[ERR] io_sendChar: srcId=%d not found", srcId);
    return;
  }
  if (src_params->result_cb NEQ NULL)
  {
    src_params->result_cb (srcId, ATI_ECHO_OUTPUT, (UBYTE*)&out, 1);
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_sendChar: no result callback srcId=%d",
                    srcId);
  }
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_URT            |
| STATE   : code                        ROUTINE : io_setRngInd       |
+--------------------------------------------------------------------+

  PURPOSE: sets the V.24 ring indicator line

*/
GLOBAL void io_setRngInd (T_IO_RING_STAT state, T_ACI_CRING_SERV_TYP bt1, T_ACI_CRING_SERV_TYP bt2)
{
  T_ATI_SRC_PARAMS *src_params;
  T_IO_RING_PARAMS ring_params;

  src_params = get_next_element (ati_src_list, NULL);
  while (src_params NEQ NULL)
  {
    if (src_params->line_state_cb NEQ NULL)
    {
      ring_params.ring_stat = state;
      ring_params.b_cap_1 = bt1;
      ring_params.b_cap_2 = bt2;

      src_params->line_state_cb (src_params->src_id, 
                                 ATI_LINE_STATE_RNG, 
                                 (ULONG)&ring_params);
    }
    src_params = get_next_element (ati_src_list, src_params);
  }
}

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_URT            |
| STATE   : code                        ROUTINE : io_setDCD          |
+--------------------------------------------------------------------+

  PURPOSE: sets the V.24 data carrier detect line

*/
#ifdef UART
GLOBAL void io_setDCD (T_ACI_CMD_SRC src_id, T_IO_DCD_STAT state)
{
  T_ATI_SRC_PARAMS *src_params;
  T_ACI_DCD_MOD     ATandC_setting;
  
  TRACE_FUNCTION("io_setDCD()");

  src_params = find_element (ati_src_list, (UBYTE)src_id, search_ati_src_id);
  if (src_params EQ NULL)
  {
    TRACE_EVENT_P1 ("[ERR] io_setDCD: srcId=%d not found", src_id);
    return;
  }
  
  qAT_AndC(src_id, &ATandC_setting);
                                    
  /* don't set DCD off if DCD shall be allways on */
  if( (ATandC_setting EQ DCD_ALWAYS_ON) AND
      (state EQ IO_DCD_OFF ) )
  {
    TRACE_EVENT ("[DBG] io_setDCD: DCD_ALWAYS_ON");
    return;
  }

  if (src_params->line_state_cb NEQ NULL)
  {
    src_params->line_state_cb ((UBYTE)src_id, ATI_LINE_STATE_DCD, (ULONG)state);
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_setDCD: no callback for srcId=%d", src_id);
  }
}
#endif /* UART */
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)              MODULE  : ACI_URT            |
| STATE   : code                        ROUTINE : io_setCommandState |
+--------------------------------------------------------------------+

  PURPOSE: sets the command state to start or end

*/
#define UNUSED_ULONG_PARAMETER (ULONG) 0L

GLOBAL void io_setCommandState(T_ATI_SRC_PARAMS *src_params, T_ATI_LINE_STATE_TYPE line_state_type)
{

  TRACE_FUNCTION("io_setCommandState()");

  if (src_params->line_state_cb NEQ NULL)
  {
    src_params->line_state_cb (src_params->src_id, line_state_type, UNUSED_ULONG_PARAMETER);
  }
  else
  {
    TRACE_EVENT_P1 ("[WRN] io_setCommandState: no callback for srcId=%d",
                    src_params->src_id);
  }
}

#endif /* ATI_IO_C */