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view src/cs/services/audio/audio_mode.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 4e78acac3d88
children
line wrap: on
line source

/****************************************************************************/
/*                                                                          */
/*  File Name:  audio_mode.c                                                */
/*                                                                          */
/*  Purpose:  This file contains all the functions used for audio mode misc */
/*            services.                                                     */
/*                                                                          */
/*  Version   0.1                                                           */
/*                                                                          */
/*  Date        Modification                                                */
/*  ------------------------------------------------------------------------*/
/*  14 Jan 2002  Create                                                     */
/*                                                                          */
/*  Author      Francois Mazard                                             */
/*                                                                          */
/* (C) Copyright 2001 by Texas Instruments Incorporated, All Rights Reserved*/
/****************************************************************************/

#include "rv/rv_defined_swe.h"

#ifdef RVM_AUDIO_MAIN_SWE
  #ifndef _WINDOWS
    #include "config/swconfig.cfg"
    #include "config/sys.cfg"
    #include "config/chipset.cfg"
  #endif

  #include "l1_confg.h"
  #include "rv/rv_general.h"
  #include "rvm/rvm_gen.h"
  #include "audio/audio_ffs_i.h"
  #include "audio/audio_api.h"
  #include "audio/audio_structs_i.h"
  #include "audio/audio_error_hdlr_i.h"
  #include "audio/audio_var_i.h"
  #include "audio/audio_messages_i.h"
  #include "audio/audio_macro_i.h"
  #include "rvf/rvf_target.h"
  #include "audio/audio_const_i.h"

  /* include the usefull L1 header */
  #ifdef _WINDOWS
    #define BOOL_FLAG
    //#define CHAR_FLAG
  #endif
  #include "l1_types.h"
  #include "l1audio_const.h"
  #include "l1audio_cust.h"
  #include "l1audio_defty.h"
  #include "l1audio_msgty.h"
  #include "l1audio_signa.h"
  #if TESTMODE
   #include "l1tm_defty.h"
  #endif
  #if (L1_GTT == 1)
    #include "l1gtt_const.h"
    #include "l1gtt_defty.h"
  #endif
  #include "l1_const.h"
  #include "l1_defty.h"
  #include "l1_msgty.h"
  #include "l1_signa.h"
  #ifdef _WINDOWS
    #define L1_ASYNC_C
  #endif
  #include "l1_varex.h"

  /* external functions */
  extern void audio_mode_full_access_write_send_status (T_AUDIO_RET status, T_RV_RETURN return_path);
  extern void audio_mode_load_send_status              (T_AUDIO_RET status, T_RV_RETURN return_path);
  extern void audio_mode_save_send_status              (T_AUDIO_RET status, T_RV_RETURN return_path);
  extern void audio_mode_speaker_volume_send_status    (T_AUDIO_RET status, T_RV_RETURN return_path);

  /********************************************************************************/
  /*                                                                              */
  /*    Function Name:   audio_mode_message_switch                                */
  /*                                                                              */
  /*    Purpose:  This function manages the dispatching of the message usefull    */
  /*              for audio mode services.                                        */
  /*                                                                              */
  /*    Input Parameters:                                                         */
  /*        Audio message.                                                        */
  /*                                                                              */
  /*    Output Parameters:                                                        */
  /*        ID of the message receptor.                                           */
  /*                                                                              */
  /*    Note:                                                                     */
  /*        None.                                                                 */
  /*                                                                              */
  /*    Revision History:                                                         */
  /*        None.                                                                 */
  /*                                                                              */
  /********************************************************************************/
  UINT8 audio_mode_message_switch(T_RV_HDR *p_message)
  {
    switch(p_message->msg_id)
    {
      case AUDIO_MODE_LOAD_REQ :
      {
        if ( (p_audio_gbl_var->audio_mode_var.audio_mode_load_var.state != AUDIO_MODE_LOAD_IDLE) ||
             (p_audio_gbl_var->audio_mode_var.full_access_write_var.state != AUDIO_MODE_FULL_WRITE_IDLE) )
        {
          AUDIO_SEND_TRACE("AUDIO MODE LOAD: an entity already uses this service", RV_TRACE_LEVEL_ERROR);
          audio_mode_load_send_status (AUDIO_ERROR, ((T_AUDIO_MODE_LOAD_REQ *)p_message)->return_path);
          p_audio_gbl_var->message_processed = TRUE;
          return (AUDIO_MODE_NONE);
        }
        return(AUDIO_MODE_LOAD);
        break;
      }
      case AUDIO_MODE_SAVE_REQ :
      {
        if ( (p_audio_gbl_var->audio_mode_var.audio_mode_load_var.state != AUDIO_MODE_LOAD_IDLE) ||
             (p_audio_gbl_var->audio_mode_var.full_access_write_var.state != AUDIO_MODE_FULL_WRITE_IDLE) )
        {
          AUDIO_SEND_TRACE("AUDIO MODE SAVE: an entity currently changes the audio mode", RV_TRACE_LEVEL_ERROR);
          audio_mode_save_send_status (AUDIO_ERROR, ((T_AUDIO_MODE_SAVE_REQ *)p_message)->return_path);
          p_audio_gbl_var->message_processed = TRUE;
          return (AUDIO_MODE_NONE);
        }
        return(AUDIO_MODE_SAVE);
        break;
      }
      case AUDIO_MODE_WRITE_REQ :
      {
        if ( (p_audio_gbl_var->audio_mode_var.audio_mode_load_var.state != AUDIO_MODE_LOAD_IDLE) ||
             (p_audio_gbl_var->audio_mode_var.full_access_write_var.state != AUDIO_MODE_FULL_WRITE_IDLE) )
        {
          AUDIO_SEND_TRACE("AUDIO MODE FULL ACCESS WRITE: an entity currently changes the audio mode", RV_TRACE_LEVEL_ERROR);
          audio_mode_full_access_write_send_status (AUDIO_ERROR,
            ((T_AUDIO_MODE_FULL_ACCESS_WRITE_REQ *)p_message)->return_path);
          p_audio_gbl_var->message_processed = TRUE;
          return (AUDIO_MODE_NONE);
        }
        return(AUDIO_FULL_ACCESS_WRITE);
        break;
      }
      case OML1_START_DAI_TEST_CON :
      case OML1_STOP_DAI_TEST_CON :
      #if (AUDIO_MODE)
        case MMI_AUDIO_MODE_CON :
      #endif
      #if (FIR)
        case MMI_AUDIO_FIR_CON :
      #endif
      case MMI_AEC_CON :
      {
        if (p_audio_gbl_var->audio_mode_var.audio_mode_load_var.state != AUDIO_MODE_LOAD_IDLE)
        {
          return(AUDIO_MODE_LOAD);
        }
        else
        if (p_audio_gbl_var->audio_mode_var.full_access_write_var.state != AUDIO_MODE_FULL_WRITE_IDLE)
        {
          return(AUDIO_FULL_ACCESS_WRITE);
        }
        break;
      }
      case AUDIO_SPEAKER_VOLUME_REQ:
      {
        if ( (p_audio_gbl_var->audio_mode_var.audio_mode_load_var.state != AUDIO_MODE_LOAD_IDLE) ||
             (p_audio_gbl_var->audio_mode_var.full_access_write_var.state != AUDIO_MODE_FULL_WRITE_IDLE) )
        {
          AUDIO_SEND_TRACE("AUDIO MODE SPEAKER VOLUME: an entity currently changes the audio mode", RV_TRACE_LEVEL_ERROR);
          audio_mode_speaker_volume_send_status (AUDIO_ERROR,
            ((T_AUDIO_SPEAKER_VOLUME_REQ *)p_message)->return_path);
          p_audio_gbl_var->message_processed = TRUE;
          return (AUDIO_MODE_NONE);
        }
        return(AUDIO_SPEAKER_VOLUME);
        break;
      }
    }
    return (AUDIO_MODE_NONE);
  }
#endif /*RVM_AUDIO_MAIN_SWE*/