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view src/ui/mfw/ti1_tmr.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 92abb46dc1ba
children
line wrap: on
line source

/*
+--------------------------------------------------------------------+
| PROJECT: MMI-Framework (8417)         $Workfile:: ti1_tmr.c       $|
| $Author:: Es  $ CONDAT GmbH           $Revision:: 8               $|
| CREATED: 28.01.99                     $Modtime:: 18.02.00 17:57   $|
| STATE  : code                                                      |
+--------------------------------------------------------------------+

   MODULE  : TI1_TMR

   PURPOSE : timer driver interface (TI1 VERSION)
             uses only one system timer (programmed in milliseconds)

   EXPORT  :

   TO DO   :

   $History:: ti1_tmr.c                                             $
 *
 *Sep 19, 2006  DRT OMAPS00091093   x0047075(Archana)
 *	Description: optimizing of the timer related vsi interface
 *	Solution:Replacing the Vsi_t_start ,Vsi_t_stop with TIMER_START and TIMER_STOP
 *****************  Version 8  *****************
 * User: Es           Date: 18.02.00   Time: 17:58
 * Updated in $/GSM/Condat/MS/SRC/MFW
 * tmrStart(): bug in inner 'if'-clause
 *
 * *****************  Version 7  *****************
 * User: Es           Date: 6.07.99    Time: 12:41
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 6  *****************
 * User: Es           Date: 14.06.99   Time: 12:15
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 5  *****************
 * User: Es           Date: 1.04.99    Time: 17:07
 * Updated in $/GSM/DEV/MS/SRC/MFW
 * removed lots of traces
 *
 * *****************  Version 4  *****************
 * User: Es           Date: 17.02.99   Time: 19:11
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 3  *****************
 * User: Es           Date: 14.02.99   Time: 20:57
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 2  *****************
 * User: Es           Date: 11.02.99   Time: 16:43
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 1  *****************
 * User: Es           Date: 9.02.99    Time: 14:54
 * Created in $/GSM/DEV/MS/SRC/MFW
 * TI display & keyboard interface for MFW
*/
#define ENTITY_MFW

#if defined (NEW_FRAME)

#include "typedefs.h"
#include "vsi.h"
#include "custom.h"
#include "gsm.h"

#else

#include "STDDEFS.H"
#include "custom.h"
#include "gsm.h"
#include "vsi.h"

#endif

#include "mfw_mfw.h"
#include "mfw_sys.h"
#include "drv_tmr.h"
#include "l4_tim.h"
#include "ti1_tmr.h"

#include "cus_aci.h"

#if !defined (NEW_FRAME)
void aci_flush_fifo (T_VSI_THANDLE timer);
#endif

static void (*sig) (void) = 0;          /* timer signaling function */
#if !defined (NEW_FRAME)
static T_VSI_THANDLE timer = 0;         /* VSI timer handle         */
#endif

/*
+--------------------------------------------------------------------+
| PROJECT : MMI-Framework (8417)        MODULE  : ti1_tmr            |
| STATE   : code                        ROUTINE : tmrTimer           |
+--------------------------------------------------------------------+

  PURPOSE : forward timer signal

*/
#if defined (NEW_FRAME)

int mfw_timeout (USHORT t)
{
    if (sig AND t EQ MFW_TIMER)
    {
      sig();
      return 1;
    }
    return 0;
}

#else

int mfw_timeout (T_VSI_THANDLE t)
{
    if (sig && t == timer)
    {
        sig();
        return 1;
    }

    return 0;
}
#endif

/*
+--------------------------------------------------------------------+
| PROJECT : MMI-Framework (8417)        MODULE  : ti1_tmr            |
| STATE   : code                        ROUTINE : tmrInit            |
+--------------------------------------------------------------------+

  PURPOSE : initialize timer driver

*/

#if defined (NEW_FRAME)

int tmrInit (void (*s)(void))
{
    sig = s;

    TRACE_FUNCTION("tmrInit()");

    if (!s)
        return 0;

    return 1;
}

#else

int tmrInit (void (*s)(void))
{
    sig = s;

    TRACE_FUNCTION("tmrInit()");

    if (!s)
        return 0;

    timer = vsi_t_open(VSI_CALLER "mfwTimer");
    if (timer < VSI_OK)
    {
        TRACE_ERROR("TI1_TMR_INIT: No Timer");
        sig = 0;
        return 0;
    }

    return 1;
}
#endif

/*
+--------------------------------------------------------------------+
| PROJECT : MMI-Framework (8417)        MODULE  : ti1_tmr            |
| STATE   : code                        ROUTINE : tmrExit            |
+--------------------------------------------------------------------+

  PURPOSE : finalize timer driver

*/

#if defined (NEW_FRAME)

int tmrExit (void)
{
    TRACE_FUNCTION("tmrExit()");

    if (sig)
    {
      tmrStop();
    }
    sig = 0;

    return 1;
}

#else

int tmrExit (void)
{
    TRACE_FUNCTION("tmrExit()");

    if (sig)
    {
        tmrStop();
        vsi_t_close(VSI_CALLER timer);
    }
    timer = 0;
    sig = 0;

    return 1;
}

#endif

/*
+--------------------------------------------------------------------+
| PROJECT : MMI-Framework (8417)        MODULE  : ti1_tmr            |
| STATE   : code                        ROUTINE : tmrStart           |
+--------------------------------------------------------------------+

  PURPOSE : start timer

*/
#if defined (NEW_FRAME)

void tmrStart (ULONG ms)
{
  if (sig)
  {
    if (ms < 5)                         /* at least one tick        */
      ms = 5;                           /* set to minimum           */
// Sep 19, 2006  DRT OMAPS00091093   x0047075(Archana)
//Replacing Vsi_t_start with TIMER_START
TIMER_START(aci_handle, MFW_TIMER, ms);
  }
}

#else

void tmrStart (U32 ms)
{
    T_VSI_TVALUE toTime;                /* VSI timer value          */

    if (sig && timer >= VSI_OK)
    {
        toTime = (ms * TMR_PREC) / TMR_TICK;
        if (ms && !toTime)
            toTime = 1;                 /* set to minimum           */

// Sep 19, 2006  DRT OMAPS00091093   x0047075(Archana)
//Replacing Vsi_t_start with TIMER_START
       TIMER_START(VSI_CALLER timer,toTime);
    }
}
#endif

/*
+--------------------------------------------------------------------+
| PROJECT : MMI-Framework (8417)        MODULE  : ti1_tmr            |
| STATE   : code                        ROUTINE : tmrStop            |
+--------------------------------------------------------------------+

  PURPOSE : stop timer

*/

#if defined (NEW_FRAME)

ULONG tmrStop (void)
{
  T_TIME left;                         /* VSI timer value          */

  if (sig)
  {
    vsi_t_status(VSI_CALLER MFW_TIMER, &left);
// Sep 19, 2006  DRT OMAPS00091093   x0047075(Archana)
//Replacing Vsi_t_stop with TIMER_STOP
TIMER_STOP(aci_handle, MFW_TIMER);
    return (left);
  }
  return 0;
}

#else

U32 tmrStop (void)
{
    T_VSI_TVALUE left;                  /* VSI timer value          */

    if (sig && timer >= VSI_OK)
    {
        vsi_t_status(VSI_CALLER timer,&left);
// Sep 19, 2006  DRT OMAPS00091093   x0047075(Archana)
//Replacing Vsi_t_stop with TIMER_STOP
TIMER_STOP(VSI_CALLER timer);
        aci_flush_fifo(timer);
        return ((left * TMR_TICK) / TMR_PREC);
    }

    return 0;
}

#endif

/*
+--------------------------------------------------------------------+
| PROJECT : MMI-Framework (8417)        MODULE  : ti1_tmr            |
| STATE   : code                        ROUTINE : tmrLeft            |
+--------------------------------------------------------------------+

  PURPOSE : report left time

*/

#if defined (NEW_FRAME)

ULONG tmrLeft (void)
{
    T_TIME left;                  /* VSI timer value          */

    if (sig)
    {
      vsi_t_status(VSI_CALLER MFW_TIMER, &left);
      return (left);
    }
    return 0;
}

#else

U32 tmrLeft (void)
{
    T_VSI_TVALUE left;                  /* VSI timer value          */

    if (sig && timer >= VSI_OK)
    {
        vsi_t_status(VSI_CALLER timer,&left);
        return ((left * TMR_TICK) / TMR_PREC);
    }

    return 0;
}

#endif