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view src/g23m-aci/aci/cmh_uart.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 fa8dc04885d8
children
line wrap: on
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/*
+----------------------------------------------------------------------------- 
|  Project :  GSM-PS (6147)
|  Modul   :  CMH_UART
+----------------------------------------------------------------------------- 
|  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 CMH_UART_H
#define CMH_UART_H


EXTERN T_ACI_LIST *uart_src_params;
EXTERN T_ACI_LIST *uart_com_par;

/*==== CONSTANTS ==================================================*/
#define NOT_SUPPORTED_UART_IO_PA_MARK 4 /* the UART does not support parity mark directly */

/*==== TYPES ======================================================*/

typedef struct
{
  UBYTE         *data;
  USHORT        data_len;
  T_ACI_CMD_SRC srcId;
} T_ACI_DTI_SEND;

typedef T_comPar T_ACI_UART_COM_PAR;
typedef struct {
  UBYTE               device;
  T_ACI_UART_COM_PAR  comPar;
  
} T_ACI_DEVICE_ENTRY;



/*==== PROTOTYPES =================================================*/

/*==== EXPORT =====================================================*/
EXTERN void           timeout_PlusIPR (void);

EXTERN BOOL           cmhUART_CMUX (T_ACI_CMD_SRC srcId);

EXTERN void           cmhUART_lst_init (void);
EXTERN BOOL           cmhUARTtest_srcId (UBYTE srcId,
                                         void *elem);

EXTERN BOOL           cmhUARTtest_device (UBYTE device,
                                          void *elem);

EXTERN T_ACI_DTI_PRC *cmhUART_find_dlci (T_ACI_LIST *search_list,
                                         UBYTE device,
                                         UBYTE dlci );
EXTERN void cmhUART_startConnection (UBYTE srcId, 
                                      T_ACI_DEVICE_TYPE device_type);

EXTERN BOOL cmhUART_stopConnection (UBYTE srcId);
EXTERN void cmhUART_getdata ( T_ACI_CMD_SRC srcId );

EXTERN void cmhUART_ParmsUpdated( UBYTE device );
EXTERN void cmhUART_DetectedESC_DTR( UBYTE device, UBYTE dlci, UBYTE cause );
EXTERN void cmhUART_init_ipr_params(void);

/*
 *  functions for cotroling UART parameters (baud rate, character framing, flow control)
 */
EXTERN void cmhUART_AddDeviceToComParameter( UBYTE device );
EXTERN void cmhUART_CleanComParameterList( void );

EXTERN T_ACI_DEVICE_TYPE cmhUART_GetDeviceType( UBYTE srcId );
EXTERN BOOL cmhUART_ChangeDeviceType( UBYTE             srcId, 
                                      T_ACI_DEVICE_TYPE device_type );
EXTERN T_ACI_DEVICE_ENTRY* cmhUART_GetDeviceParOverDevice( UBYTE device );
EXTERN T_ACI_DEVICE_ENTRY* cmhUART_GetDeviceParOverSrcID( UBYTE srcId );
EXTERN void cmhUART_SetComParToUnchanged( T_comPar *comPar );
EXTERN T_ACI_RETURN cmhUART_SetDataRate ( UBYTE srcId, T_ACI_BD_RATE  rate);
EXTERN T_ACI_RETURN cmhUART_SetCharacterFraming ( UBYTE srcId, 
                                                  T_ACI_BS_FRM format, 
                                                  T_ACI_BS_PAR parity );
EXTERN T_ACI_RETURN cmhUART_SetFlowControl(UBYTE srcId, T_ACI_RX_FLOW_CTRL DCE_by_DTE);
EXTERN T_ACI_BS_FRM cmhUART_GetFktInterfaceFormat( T_ACI_UART_COM_PAR *comPar );
EXTERN T_ACI_BS_PAR cmhUART_GetFktInterfaceParity( T_ACI_UART_COM_PAR *comPar );

EXTERN UBYTE cmhUART_GetParityOverSrcID( UBYTE srcId );
EXTERN UBYTE cmhUART_GetDataBitOverSrcID( UBYTE srcId );
EXTERN UBYTE cmhUART_GetStopBitOverSrcID( UBYTE srcId );
EXTERN void  cmhUART_lst_exit (void);


#ifdef CMH_UARTF_C

GLOBAL T_ACI_AT_CMD uartEntcurCmd[CMD_SRC_MAX];

#else

EXTERN T_ACI_AT_CMD uartEntcurCmd[];

#endif /* CMH_UARTF_C */

#endif /* CMH_UART_H */

/*==== EOF =======================================================*/