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Diffstat (limited to 'drivers/staging/epl/EplTimeruLinuxKernel.c')
| -rw-r--r-- | drivers/staging/epl/EplTimeruLinuxKernel.c | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/drivers/staging/epl/EplTimeruLinuxKernel.c b/drivers/staging/epl/EplTimeruLinuxKernel.c new file mode 100644 index 000000000000..08820d184055 --- /dev/null +++ b/drivers/staging/epl/EplTimeruLinuxKernel.c @@ -0,0 +1,446 @@ +/**************************************************************************** + + (c) SYSTEC electronic GmbH, D-07973 Greiz, August-Bebel-Str. 29 + www.systec-electronic.com + + Project: openPOWERLINK + + Description: source file for EPL User Timermodule for Linux kernel module + + License: + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + 3. Neither the name of SYSTEC electronic GmbH nor the names of its + contributors may be used to endorse or promote products derived + from this software without prior written permission. For written + permission, please contact info@systec-electronic.com. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. + + Severability Clause: + + If a provision of this License is or becomes illegal, invalid or + unenforceable in any jurisdiction, that shall not affect: + 1. the validity or enforceability in that jurisdiction of any other + provision of this License; or + 2. the validity or enforceability in other jurisdictions of that or + any other provision of this License. + + ------------------------------------------------------------------------- + + $RCSfile: EplTimeruLinuxKernel.c,v $ + + $Author: D.Krueger $ + + $Revision: 1.6 $ $Date: 2008/04/17 21:36:32 $ + + $State: Exp $ + + Build Environment: + KEIL uVision 2 + + ------------------------------------------------------------------------- + + Revision History: + + 2006/09/12 d.k.: start of the implementation + +****************************************************************************/ + +#include "user/EplTimeru.h" +#include <linux/timer.h> + +/***************************************************************************/ +/* */ +/* */ +/* G L O B A L D E F I N I T I O N S */ +/* */ +/* */ +/***************************************************************************/ + +//--------------------------------------------------------------------------- +// const defines +//--------------------------------------------------------------------------- + +//--------------------------------------------------------------------------- +// local types +//--------------------------------------------------------------------------- +typedef struct { + struct timer_list m_Timer; + tEplTimerArg TimerArgument; + +} tEplTimeruData; + +//--------------------------------------------------------------------------- +// modul globale vars +//--------------------------------------------------------------------------- + +//--------------------------------------------------------------------------- +// local function prototypes +//--------------------------------------------------------------------------- +static void PUBLIC EplTimeruCbMs(unsigned long ulParameter_p); + +/***************************************************************************/ +/* */ +/* */ +/* C L A S S <Epl Userspace-Timermodule for Linux Kernel> */ +/* */ +/* */ +/***************************************************************************/ +// +// Description: Epl Userspace-Timermodule for Linux Kernel +// +// +/***************************************************************************/ + +//=========================================================================// +// // +// P U B L I C F U N C T I O N S // +// // +//=========================================================================// + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruInit +// +// Description: function inits first instance +// +// Parameters: void +// +// Returns: tEplKernel = errorcode +// +// State: +// +//--------------------------------------------------------------------------- + +tEplKernel PUBLIC EplTimeruInit() +{ + tEplKernel Ret; + + Ret = EplTimeruAddInstance(); + + return Ret; +} + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruAddInstance +// +// Description: function inits additional instance +// +// Parameters: void +// +// Returns: tEplKernel = errorcode +// +// State: +// +//--------------------------------------------------------------------------- + +tEplKernel PUBLIC EplTimeruAddInstance() +{ + tEplKernel Ret; + + Ret = kEplSuccessful; + + return Ret; +} + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruDelInstance +// +// Description: function deletes instance +// -> under Linux nothing to do +// -> no instance table needed +// +// Parameters: void +// +// Returns: tEplKernel = errorcode +// +// State: +// +//--------------------------------------------------------------------------- + +tEplKernel PUBLIC EplTimeruDelInstance() +{ + tEplKernel Ret; + + Ret = kEplSuccessful; + + return Ret; +} + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruSetTimerMs +// +// Description: function creates a timer and returns the corresponding handle +// +// Parameters: pTimerHdl_p = pointer to a buffer to fill in the handle +// ulTime_p = time for timer in ms +// Argument_p = argument for timer +// +// Returns: tEplKernel = errorcode +// +// State: +// +//--------------------------------------------------------------------------- + +tEplKernel PUBLIC EplTimeruSetTimerMs(tEplTimerHdl * pTimerHdl_p, + unsigned long ulTime_p, + tEplTimerArg Argument_p) +{ + tEplKernel Ret = kEplSuccessful; + tEplTimeruData *pData; + + // check pointer to handle + if (pTimerHdl_p == NULL) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + + pData = (tEplTimeruData *) EPL_MALLOC(sizeof(tEplTimeruData)); + if (pData == NULL) { + Ret = kEplNoResource; + goto Exit; + } + + init_timer(&pData->m_Timer); + pData->m_Timer.function = EplTimeruCbMs; + pData->m_Timer.data = (unsigned long)pData; + pData->m_Timer.expires = jiffies + ulTime_p * HZ / 1000; + + EPL_MEMCPY(&pData->TimerArgument, &Argument_p, sizeof(tEplTimerArg)); + + add_timer(&pData->m_Timer); + + *pTimerHdl_p = (tEplTimerHdl) pData; + + Exit: + return Ret; +} + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruModifyTimerMs +// +// Description: function changes a timer and returns the corresponding handle +// +// Parameters: pTimerHdl_p = pointer to a buffer to fill in the handle +// ulTime_p = time for timer in ms +// Argument_p = argument for timer +// +// Returns: tEplKernel = errorcode +// +// State: +// +//--------------------------------------------------------------------------- + +tEplKernel PUBLIC EplTimeruModifyTimerMs(tEplTimerHdl * pTimerHdl_p, + unsigned long ulTime_p, + tEplTimerArg Argument_p) +{ + tEplKernel Ret = kEplSuccessful; + tEplTimeruData *pData; + + // check pointer to handle + if (pTimerHdl_p == NULL) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + // check handle itself, i.e. was the handle initialized before + if (*pTimerHdl_p == 0) { + Ret = EplTimeruSetTimerMs(pTimerHdl_p, ulTime_p, Argument_p); + goto Exit; + } + pData = (tEplTimeruData *) * pTimerHdl_p; + if ((tEplTimeruData *) pData->m_Timer.data != pData) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + + mod_timer(&pData->m_Timer, (jiffies + ulTime_p * HZ / 1000)); + + // copy the TimerArg after the timer is restarted, + // so that a timer occured immediately before mod_timer + // won't use the new TimerArg and + // therefore the old timer cannot be distinguished from the new one. + // But if the new timer is too fast, it may get lost. + EPL_MEMCPY(&pData->TimerArgument, &Argument_p, sizeof(tEplTimerArg)); + + // check if timer is really running + if (timer_pending(&pData->m_Timer) == 0) { // timer is not running + // retry starting it + add_timer(&pData->m_Timer); + } + // set handle to pointer of tEplTimeruData +// *pTimerHdl_p = (tEplTimerHdl) pData; + + Exit: + return Ret; +} + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruDeleteTimer +// +// Description: function deletes a timer +// +// Parameters: pTimerHdl_p = pointer to a buffer to fill in the handle +// +// Returns: tEplKernel = errorcode +// +// State: +// +//--------------------------------------------------------------------------- + +tEplKernel PUBLIC EplTimeruDeleteTimer(tEplTimerHdl * pTimerHdl_p) +{ + tEplKernel Ret = kEplSuccessful; + tEplTimeruData *pData; + + // check pointer to handle + if (pTimerHdl_p == NULL) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + // check handle itself, i.e. was the handle initialized before + if (*pTimerHdl_p == 0) { + Ret = kEplSuccessful; + goto Exit; + } + pData = (tEplTimeruData *) * pTimerHdl_p; + if ((tEplTimeruData *) pData->m_Timer.data != pData) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + +/* if (del_timer(&pData->m_Timer) == 1) + { + kfree(pData); + } +*/ + // try to delete the timer + del_timer(&pData->m_Timer); + // free memory in any case + kfree(pData); + + // uninitialize handle + *pTimerHdl_p = 0; + + Exit: + return Ret; + +} + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruIsTimerActive +// +// Description: checks if the timer referenced by the handle is currently +// active. +// +// Parameters: TimerHdl_p = handle of the timer to check +// +// Returns: BOOL = TRUE, if active; +// FALSE, otherwise +// +// State: +// +//--------------------------------------------------------------------------- + +BOOL PUBLIC EplTimeruIsTimerActive(tEplTimerHdl TimerHdl_p) +{ + BOOL fActive = FALSE; + tEplTimeruData *pData; + + // check handle itself, i.e. was the handle initialized before + if (TimerHdl_p == 0) { // timer was not created yet, so it is not active + goto Exit; + } + pData = (tEplTimeruData *) TimerHdl_p; + if ((tEplTimeruData *) pData->m_Timer.data != pData) { // invalid timer + goto Exit; + } + // check if timer is running + if (timer_pending(&pData->m_Timer) == 0) { // timer is not running + goto Exit; + } + + fActive = TRUE; + + Exit: + return fActive; +} + +//=========================================================================// +// // +// P R I V A T E F U N C T I O N S // +// // +//=========================================================================// + +//--------------------------------------------------------------------------- +// +// Function: EplTimeruCbMs +// +// Description: function to process timer +// +// +// +// Parameters: lpParameter = pointer to structur of type tEplTimeruData +// +// +// Returns: (none) +// +// +// State: +// +//--------------------------------------------------------------------------- +static void PUBLIC EplTimeruCbMs(unsigned long ulParameter_p) +{ + tEplKernel Ret = kEplSuccessful; + tEplTimeruData *pData; + tEplEvent EplEvent; + tEplTimerEventArg TimerEventArg; + + pData = (tEplTimeruData *) ulParameter_p; + + // call event function + TimerEventArg.m_TimerHdl = (tEplTimerHdl) pData; + TimerEventArg.m_ulArg = pData->TimerArgument.m_ulArg; + + EplEvent.m_EventSink = pData->TimerArgument.m_EventSink; + EplEvent.m_EventType = kEplEventTypeTimer; + EPL_MEMSET(&EplEvent.m_NetTime, 0x00, sizeof(tEplNetTime)); + EplEvent.m_pArg = &TimerEventArg; + EplEvent.m_uiSize = sizeof(TimerEventArg); + + Ret = EplEventuPost(&EplEvent); + + // d.k. do not free memory, user has to call EplTimeruDeleteTimer() + //kfree(pData); + +} + +// EOF |