patch-2.3.29 linux/drivers/net/sk98lin/skgehwt.c

• Lines: 214
• Date: Tue Nov 23 10:15:42 1999
• Orig file: v2.3.28/linux/drivers/net/sk98lin/skgehwt.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.28/linux/drivers/net/sk98lin/skgehwt.c linux/drivers/net/sk98lin/skgehwt.c
@@ -0,0 +1,213 @@
+/******************************************************************************
+ *
+ * Name:	skgehwt.c
+ * Project:	GEnesis, PCI Gigabit Ethernet Adapter
+ * Version:	$Revision: 1.12 $
+ * Date:	$Date: 1998/10/15 15:11:34 $
+ * Purpose:	Hardware Timer.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	See the file "skge.c" for further information.
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	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 */