skgehwt.c
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- /******************************************************************************
- *
- * Name: skgehwt.c
- * Project: PCI Gigabit Ethernet Adapter
- * Version: $Revision: 1.12 $
- * Date: $Date: 1998/10/15 15:11:34 $
- * Purpose: Hardware Timer.
- *
- ******************************************************************************/
- /******************************************************************************
- *
- * (C)Copyright 1989-1998 SysKonnect,
- * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
- * All Rights Reserved
- *
- * THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF SYSKONNECT
- * The copyright notice above does not evidence any
- * actual or intended publication of such source code.
- *
- * This Module contains Proprietary Information of SysKonnect
- * and should be treated as Confidential.
- *
- * The information in this file is provided for the exclusive use of
- * the licensees of SysKonnect.
- * Such users have the right to use, modify, and incorporate this code
- * into products for purposes authorized by the license agreement
- * provided they include this notice and the associated copyright notice
- * with any such product.
- * The information in this file is provided "AS IS" without warranty.
- *
- ******************************************************************************/
- /******************************************************************************
- *
- * History:
- *
- * $Log: skgehwt.c,v $
- * Revision 1.12 1998/10/15 15:11:34 gklug
- * fix: ID_sccs to SysKonnectFileId
- *
- * Revision 1.11 1998/10/08 15:27:51 gklug
- * chg: correction factor is host clock dependent
- *
- * Revision 1.10 1998/09/15 14:18:31 cgoos
- * Changed more BOOLEANs to SK_xxx
- *
- * Revision 1.9 1998/09/15 14:16:06 cgoos
- * Changed line 107: FALSE to SK_FALSE
- *
- * Revision 1.8 1998/08/24 13:04:44 gklug
- * fix: typo
- *
- * Revision 1.7 1998/08/19 09:50:49 gklug
- * fix: remove struct keyword from c-code (see CCC) add typedefs
- *
- * Revision 1.6 1998/08/17 09:59:02 gklug
- * fix: typos
- *
- * Revision 1.5 1998/08/14 07:09:10 gklug
- * fix: chg pAc -> pAC
- *
- * Revision 1.4 1998/08/10 14:14:52 gklug
- * rmv: unneccessary SK_ADDR macro
- *
- * Revision 1.3 1998/08/07 12:53:44 gklug
- * fix: first compiled version
- *
- * Revision 1.2 1998/08/07 09:19:29 gklug
- * adapt functions to the C coding conventions
- * rmv unneccessary functions.
- *
- * Revision 1.1 1998/08/05 11:28:36 gklug
- * first version: adapted from SMT/FDDI
- *
- *
- *
- *
- ******************************************************************************/
- /*
- Event queue and dispatcher
- */
- static const char SysKonnectFileId[] =
- "$Header: /usr56/projects/ge/schedule/skgehwt.c,v 1.12 1998/10/15 15:11:34 gklug Exp $" ;
- #include "h/skdrv1st.h" /* Driver Specific Definitions */
- #include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
- #ifdef __C2MAN__
- /*
- Hardware Timer function queue management.
- General Description:
- */
- intro()
- {}
- #endif
- /*
- * Prototypes of local functions.
- */
- #define SK_HWT_MAX (65000)
- /* correction factor */
- #define SK_HWT_FAC (1000 * (SK_U32)pAC->GIni.GIHstClkFact / 100)
- /*
- * Initialize hardware timer.
- *
- * Must be called during init level 1.
- */
- void SkHwtInit(
- SK_AC *pAC, /* Adapters context */
- SK_IOC Ioc) /* IoContext */
- {
- pAC->Hwt.TStart = 0 ;
- pAC->Hwt.TStop = 0 ;
- pAC->Hwt.TActive = SK_FALSE ;
- SkHwtStop(pAC,Ioc) ;
- }
- /*
- *
- * Start hardware timer (clock ticks are 16us).
- *
- */
- void SkHwtStart(
- SK_AC *pAC, /* Adapters context */
- SK_IOC Ioc, /* IoContext */
- SK_U32 Time) /* Time in units of 16us to load the timer with. */
- {
- SK_U32 Cnt ;
- if (Time > SK_HWT_MAX)
- Time = SK_HWT_MAX ;
- pAC->Hwt.TStart = Time ;
- pAC->Hwt.TStop = 0L ;
- Cnt = Time ;
- /*
- * if time < 16 us
- * time = 16 us
- */
- if (!Cnt) {
- Cnt++ ;
- }
- SK_OUT32(Ioc, B2_TI_INI, Cnt * SK_HWT_FAC) ;
- SK_OUT16(Ioc, B2_TI_CRTL, TIM_START) ; /* Start timer. */
- pAC->Hwt.TActive = SK_TRUE ;
- }
- /*
- * Stop hardware timer.
- * and clear the timer IRQ
- */
- void SkHwtStop(
- SK_AC *pAC, /* Adapters context */
- SK_IOC Ioc) /* IoContext */
- {
- SK_OUT16(Ioc, B2_TI_CRTL, TIM_STOP) ;
- SK_OUT16(Ioc, B2_TI_CRTL, TIM_CLR_IRQ) ;
- pAC->Hwt.TActive = SK_FALSE ;
- }
- /*
- * Stop hardware timer and read time elapsed since last start.
- *
- * returns
- * The elapsed time since last start in units of 16us.
- *
- */
- SK_U32 SkHwtRead(
- SK_AC *pAC, /* Adapters context */
- SK_IOC Ioc) /* IoContext */
- {
- SK_U32 TRead ;
- SK_U32 IStatus ;
- if (pAC->Hwt.TActive) {
- SkHwtStop(pAC,Ioc) ;
- SK_IN32(Ioc, B2_TI_VAL, &TRead);
- TRead /= SK_HWT_FAC;
- SK_IN32(Ioc, B0_ISRC, &IStatus);
- /* Check if timer expired (or wraparound). */
- if ((TRead > pAC->Hwt.TStart) || (IStatus & IS_TIMINT)) {
- SkHwtStop(pAC,Ioc) ;
- pAC->Hwt.TStop = pAC->Hwt.TStart ;
- } else {
- pAC->Hwt.TStop = pAC->Hwt.TStart - TRead ;
- }
- }
- return (pAC->Hwt.TStop) ;
- }
- /*
- * interrupt source= timer
- */
- void SkHwtIsr(
- SK_AC *pAC, /* Adapters context */
- SK_IOC Ioc) /* IoContext */
- {
- SkHwtStop(pAC,Ioc);
- pAC->Hwt.TStop = pAC->Hwt.TStart;
- SkTimerDone(pAC,Ioc) ;
- }
- /* End of file */