diff options
Diffstat (limited to 'drivers/sk98lin/skgehwt.c')
| -rw-r--r-- | drivers/sk98lin/skgehwt.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/sk98lin/skgehwt.c b/drivers/sk98lin/skgehwt.c new file mode 100644 index 0000000..8996b7f --- /dev/null +++ b/drivers/sk98lin/skgehwt.c @@ -0,0 +1,214 @@ +/****************************************************************************** + * + * Name: skgehwt.c + * Project: GEnesis, PCI Gigabit Ethernet Adapter + * Version: $Revision: 1.13 $ + * Date: $Date: 1999/11/22 13:31:12 $ + * Purpose: Hardware Timer. + * + ******************************************************************************/ + +/****************************************************************************** + * + * (C)Copyright 1998,1999 SysKonnect, + * a business unit of Schneider & Koch & Co. Datensysteme GmbH. + * + * 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 1.13 1999/11/22 13:31:12 cgoos + * Changed license header to GPL. + * + * 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 1.13 1999/11/22 13:31:12 cgoos 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 */ |