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view src/condat/com/include/rx.h @ 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
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/* 
+----------------------------------------------------------------------------- 
|  Project :  GSM (6301)
|  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 :  Types definitions for the fieldstrength driver
|             .
+----------------------------------------------------------------------------- 

 $Hist       

    Oct 05, 2006    ER: OMAPS00094496 x0061088(Prachi)
    Description:Enhance RSSI to 3 parameters: Strength, quality, min-access-level
    Solution:In order to provide a more accurate antenna icon on screen, in addition to "signal strength" the parameters
    "signal quality" and "Min-aces-level" are required. 

*/ 

#ifndef RX_H
#define RX_H

/*
 * Signal Values
 */
#define RX_QUAL_UNAVAILABLE   0xFF /* should be kept identically   */ 
                                   /* with the value defined in RR */
#ifdef FF_PS_RSSI
#define RX_ACCE_UNAVAILABLE   0xFF
#endif

/*
 * Signal Types
 */
#define RX_SIGTYPE_RXLEVEL    0

/*
 * Status Type
 */
typedef struct rx_Status_Type
{
  UBYTE actLevel;
  UBYTE gsmLevel;
  UBYTE rxQuality;
#ifdef FF_PS_RSSI
  UBYTE min_access_level;
#endif
} rx_Status_Type;

/*
 * Driver Control Block
 */
typedef struct rx_DCB_Type
{
  UBYTE    Steps;
} rx_DCB_Type;

#if defined (NEW_FRAME)
/*
 * to achieve backward compatibility with older definitions
 */
#define drv_SignalCB_Type           T_DRV_CB_FUNC
#define drv_SignalID_Type           T_DRV_SIGNAL
#define T_VSI_THANDLE               USHORT
#endif
/*
 * Prototypes
 */
EXTERN UBYTE rx_Init        (drv_SignalCB_Type   in_SignalCBPtr);
EXTERN void  rx_Exit        (void);
EXTERN UBYTE rx_SetConfig   (rx_DCB_Type       * in_DCBPtr);
EXTERN UBYTE rx_GetConfig   (rx_DCB_Type       * out_DCBPtr);
EXTERN UBYTE rx_GetStatus   (rx_Status_Type    * out_StatusPtr);
EXTERN void  rx_timeout     (T_VSI_THANDLE       rx_handle);
#endif