📄 canpie_hal.c.svn-base
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//****************************************************************************//// File: canpie_hal.c //// Description: CANpie hardware abstraction layer (HAL) //// Author: Uwe Koppe //// e-mail: koppe@microcontrol.net //// ////============================================================================//// This program is free software; you can redistribute it and/or modify //// it under the terms of the GNU Lesser General Public License as published //// by the Free Software Foundation; either version 2.1 of the License, or //// (at your option) any later version. ////============================================================================//// //// Date History //// ---------- -------------------------------------------------------------- //// 29.07.2003 Initial version //// ////****************************************************************************////------------------------------------------------------------------------------// CVS version information:// $Id: canpie_hal.c,v 1.4 2005/06/23 13:29:54 microcontrol Exp $//------------------------------------------------------------------------------/*----------------------------------------------------------------------------*\** Include files **** **\*----------------------------------------------------------------------------*/#include <asm/uaccess.h> // memset()#include <linux/kernel.h>#include <linux/module.h>#include <linux/init.h>#include <linux/can/canpie_dbg.h>#include <linux/can/canpie_hal.h> // Hardware abstraction layer#include <linux/can/canpie_proc.h> // interface to /proc filesystem#include <linux/can/cpcanmsg.h> // CAN message struct access#if CP_CONFIG_SOCKET == 1#include <linux/can/af_can.h> // socket support#endif/*----------------------------------------------------------------------------*\** Definitions **** **\*----------------------------------------------------------------------------*//*----------------------------------------------------------------------------*\** Module information **** **\*----------------------------------------------------------------------------*/MODULE_DESCRIPTION("CANpie kernel driver");MODULE_AUTHOR("Uwe Koppe <koppe@microcontrol.net>");MODULE_LICENSE("GPL");MODULE_VERSION("1:"CP_MODULE_VERSION);EXPORT_SYMBOL(can_register_driver);EXPORT_SYMBOL(can_unregister_driver);EXPORT_SYMBOL(can_queue_rcv_pop);EXPORT_SYMBOL(can_queue_rcv_push);EXPORT_SYMBOL(can_queue_trm_pop);EXPORT_SYMBOL(can_queue_trm_push);/*----------------------------------------------------------------------------*\** Module variables **** **\*----------------------------------------------------------------------------*/static _TsCpHal atsCpHalS[CP_CHANNEL_MAX];/*----------------------------------------------------------------------------*\** Debugging **** **\*----------------------------------------------------------------------------*/#ifdef CP_DEBUGunsigned short uwCpDebugG = 2;module_param_named(debug, uwCpDebugG, ushort, 0);MODULE_PARM_DESC(debug, " Set debug level, 0=quiet .. 5=noisy");static char szMsgDbgS[64]; // CAN message debugging -> can_debug_frame()static char *aszBitratesS[] = { "10 kBit/s", "20 kBit/s", "50 kBit/s", "100 kBit/s", "125 kBit/s", "250 kBit/s", "500 kBit/s", "800 kBit/s", "1 MBit/s", "Used defined, BTR values" }; static char *aszModeS[] = { "STOP", "ACTIVE", "SLEEP" };#endif#ifdef CP_DEBUGstatic void can_print_frame(_TsCpCanMsg * ptsCanMsgV, char * szBufferV);#else#define can_print_frame(A, B) #endif/*----------------------------------------------------------------------------*\** Functions **** **\*----------------------------------------------------------------------------*///----------------------------------------------------------------------------//// CpCoreBitrate() //// Setup baudrate of CAN controller ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBitrate(_TsCpPort * ptsPortV, _TsCpBitrate * ptsBitrateV){ _U08 ubReturnT; _FnBitrate pfnHalT; // function of HAL //---------------------------------------------------------------- // check logic port number // if(ptsPortV == 0L) return(CpErr_CHANNEL); if( (ptsPortV->slLogIf) >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); //---------------------------------------------------------------- // test if handler is installed on the requested channel // pfnHalT = atsCpHalS[ptsPortV->slLogIf].pfnBitrate; if(pfnHalT == 0L) { PK_DBG(eDBG_FUNC, "can%d: No driver function", ptsPortV->slLogIf); return(CpErr_NOT_SUPPORTED); } if(ptsBitrateV->ubBaudSel > CP_BAUD_MAX) { PK_DBG( eDBG_FUNC, "can%d: bitrate out of range (ubBaudSel=%d)", ptsPortV->slLogIf, ptsBitrateV->ubBaudSel ); return(CpErr_BAUDRATE); } //---------------------------------------------------------------- // call the handler // // PK_DBG( eDBG_FUNC, "can%d: set bitrate to %s", ptsPortV->slLogIf, aszBitratesS[ptsBitrateV->ubBaudSel] ); ubReturnT = (* pfnHalT )(ptsPortV, ptsBitrateV); return(ubReturnT);}//----------------------------------------------------------------------------//// CpCoreBufferGetDlc() //// Get DLC of buffer ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBufferGetDlc(_TsCpPort * ptsPortV, _U08 ubBufferV, _U08 * pubDlcV){ _U08 ubReturnT; _FnBufferGetDlc pfnHalT; // function of HAL //---------------------------------------------------------------- // check logic port number // if(ptsPortV == 0L) return(CpErr_CHANNEL); if( (ptsPortV->slLogIf) >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); //---------------------------------------------------------------- // test if handler is installed on the requested channel // pfnHalT = atsCpHalS[ptsPortV->slLogIf].pfnBufferGetDlc; if(pfnHalT == 0L) { PK_DBG(2, "NULL pointer on channel %d", ptsPortV->slLogIf); return(CpErr_NOT_SUPPORTED); } //---------------------------------------------------------------- // call the handler // ubReturnT = (* pfnHalT )(ptsPortV, ubBufferV, pubDlcV); return(ubReturnT);}//----------------------------------------------------------------------------//// CpCoreBufferInit() //// Allocate buffer of FullCAN controller ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBufferInit(_U08 ubChannelV, _TsCpCanMsg * ptsCanMsgV, _U08 ubDirectionV){ //--- test the channel number ------------------------------------ if( ubChannelV >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); return (CpErr_OK);}//----------------------------------------------------------------------------//// CpCoreBufferRelease() //// De-Allocate a FullCAN buffer ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBufferRelease(_U08 ubChannelV, _U08 ubBufferNumV){ //--- test the channel number ------------------------------------ if( (ubChannelV + 1) > CP_CHANNEL_MAX) return (CpErr_CHANNEL); return (CpErr_OK);}//----------------------------------------------------------------------------//// CpCoreBufferSetDlc() //// Set DLC of buffer ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBufferSetDlc( _U08 ubChannelV, _U08 ubBufferV, _U08 ubDlcV){ //--- test the channel number ------------------------------------ if( ubChannelV >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); return (CpErr_OK);}//----------------------------------------------------------------------------//// CpCoreBufferSend() //// Send message of FullCAN buffer ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBufferSend(_U08 ubChannelV, _U08 ubBufferV){ //--- test the channel number ------------------------------------ if( ubChannelV >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); return (CpErr_OK);}//----------------------------------------------------------------------------//// CpCoreBufferTransmit() //// Transmit contents of buffer ////----------------------------------------------------------------------------//_TvCpStatus CpCoreBufferTransmit(_U08 ubChannelV, _TsCpCanMsg * ptsCanMsgV){ //--- test the channel number ------------------------------------ if( (ubChannelV + 1) > CP_CHANNEL_MAX) return (CpErr_CHANNEL); return (CpErr_OK);}//----------------------------------------------------------------------------//// CpCoreCanMode() //// Set state of CAN controller ////----------------------------------------------------------------------------//_TvCpStatus CpCoreCanMode(_TsCpPort * ptsPortV, _U08 ubModeV){ _U08 ubReturnT; _FnCanMode pfnHalT; // function of HAL //---------------------------------------------------------------- // check logic port number // if(ptsPortV == 0L) return(CpErr_CHANNEL); if( (ptsPortV->slLogIf) >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); //---------------------------------------------------------------- // test if handler is installed on the requested channel // pfnHalT = atsCpHalS[ptsPortV->slLogIf].pfnCanMode; if(pfnHalT == 0L) { PK_DBG(eDBG_FUNC, "can%d: No driver function", ptsPortV->slLogIf); return(CpErr_NOT_SUPPORTED); } if(ubModeV > CP_MODE_SLEEP) { PK_DBG( eDBG_FUNC, "can%d: mode out of range (mode=%d)", ptsPortV->slLogIf, ubModeV ); return(CpErr_PARAM); } //---------------------------------------------------------------- // call the handler // PK_DBG( eDBG_FUNC, "can%d: set mode to '%s'", ptsPortV->slLogIf, aszModeS[ubModeV] ); ubReturnT = (* pfnHalT )(ptsPortV, ubModeV); return(ubReturnT);}//----------------------------------------------------------------------------//// CpCoreCanState() //// Retrive state of CAN controller ////----------------------------------------------------------------------------//_TvCpStatus CpCoreCanStatus(_TsCpPort * ptsPortV, _U08 * pubStatusV){ _U08 ubReturnT; _FnCanStatus pfnHalT; // function of HAL //---------------------------------------------------------------- // check logic port number // if(ptsPortV == 0L) return(CpErr_CHANNEL); if( (ptsPortV->slLogIf) >= CP_CHANNEL_MAX) return (CpErr_CHANNEL); //---------------------------------------------------------------- // test if handler is installed on the requested channel // pfnHalT = atsCpHalS[ptsPortV->slLogIf].pfnCanStatus; if(pfnHalT == 0L) { PK_DBG(2, "NULL pointer on channel %d", ptsPortV->slLogIf); return(CpErr_NOT_SUPPORTED); } //---------------------------------------------------------------- // call the handler // ubReturnT = (* pfnHalT )(ptsPortV, pubStatusV); return(ubReturnT);}//----------------------------------------------------------------------------//// CpCoreCanStatistic() //// ////----------------------------------------------------------------------------//⌨️ 快捷键说明
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