upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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220 lines
4.7 KiB
220 lines
4.7 KiB
/******************************************************************************
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*
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* Name: skgehwt.c
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* Project: GEnesis, PCI Gigabit Ethernet Adapter
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* Version: $Revision: 1.13 $
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* Date: $Date: 1999/11/22 13:31:12 $
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* Purpose: Hardware Timer.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* (C)Copyright 1998,1999 SysKonnect,
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* a business unit of Schneider & Koch & Co. Datensysteme GmbH.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The information in this file is provided "AS IS" without warranty.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* History:
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*
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* $Log: skgehwt.c,v $
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* Revision 1.13 1999/11/22 13:31:12 cgoos
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* Changed license header to GPL.
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*
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* Revision 1.12 1998/10/15 15:11:34 gklug
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* fix: ID_sccs to SysKonnectFileId
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*
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* Revision 1.11 1998/10/08 15:27:51 gklug
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* chg: correction factor is host clock dependent
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*
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* Revision 1.10 1998/09/15 14:18:31 cgoos
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* Changed more BOOLEANs to SK_xxx
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*
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* Revision 1.9 1998/09/15 14:16:06 cgoos
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* Changed line 107: FALSE to SK_FALSE
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*
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* Revision 1.8 1998/08/24 13:04:44 gklug
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* fix: typo
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*
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* Revision 1.7 1998/08/19 09:50:49 gklug
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* fix: remove struct keyword from c-code (see CCC) add typedefs
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*
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* Revision 1.6 1998/08/17 09:59:02 gklug
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* fix: typos
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*
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* Revision 1.5 1998/08/14 07:09:10 gklug
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* fix: chg pAc -> pAC
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*
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* Revision 1.4 1998/08/10 14:14:52 gklug
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* rmv: unneccessary SK_ADDR macro
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*
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* Revision 1.3 1998/08/07 12:53:44 gklug
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* fix: first compiled version
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*
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* Revision 1.2 1998/08/07 09:19:29 gklug
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* adapt functions to the C coding conventions
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* rmv unneccessary functions.
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*
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* Revision 1.1 1998/08/05 11:28:36 gklug
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* first version: adapted from SMT/FDDI
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*
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*
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*
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*
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******************************************************************************/
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#include <config.h>
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#ifdef CONFIG_SK98
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/*
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Event queue and dispatcher
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*/
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static const char SysKonnectFileId[] =
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"$Header: /usr56/projects/ge/schedule/skgehwt.c,v 1.13 1999/11/22 13:31:12 cgoos Exp $" ;
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#include "h/skdrv1st.h" /* Driver Specific Definitions */
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#include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
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#ifdef __C2MAN__
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/*
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Hardware Timer function queue management.
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General Description:
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*/
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intro()
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{}
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#endif
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/*
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* Prototypes of local functions.
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*/
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#define SK_HWT_MAX (65000)
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/* correction factor */
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#define SK_HWT_FAC (1000 * (SK_U32)pAC->GIni.GIHstClkFact / 100)
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/*
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* Initialize hardware timer.
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*
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* Must be called during init level 1.
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*/
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void SkHwtInit(
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SK_AC *pAC, /* Adapters context */
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SK_IOC Ioc) /* IoContext */
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{
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pAC->Hwt.TStart = 0 ;
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pAC->Hwt.TStop = 0 ;
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pAC->Hwt.TActive = SK_FALSE ;
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SkHwtStop(pAC,Ioc) ;
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}
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/*
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*
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* Start hardware timer (clock ticks are 16us).
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*
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*/
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void SkHwtStart(
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SK_AC *pAC, /* Adapters context */
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SK_IOC Ioc, /* IoContext */
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SK_U32 Time) /* Time in units of 16us to load the timer with. */
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{
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SK_U32 Cnt ;
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if (Time > SK_HWT_MAX)
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Time = SK_HWT_MAX ;
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pAC->Hwt.TStart = Time ;
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pAC->Hwt.TStop = 0L ;
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Cnt = Time ;
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/*
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* if time < 16 us
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* time = 16 us
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*/
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if (!Cnt) {
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Cnt++ ;
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}
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SK_OUT32(Ioc, B2_TI_INI, Cnt * SK_HWT_FAC) ;
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SK_OUT16(Ioc, B2_TI_CRTL, TIM_START) ; /* Start timer. */
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pAC->Hwt.TActive = SK_TRUE ;
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}
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/*
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* Stop hardware timer.
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* and clear the timer IRQ
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*/
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void SkHwtStop(
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SK_AC *pAC, /* Adapters context */
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SK_IOC Ioc) /* IoContext */
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{
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SK_OUT16(Ioc, B2_TI_CRTL, TIM_STOP) ;
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SK_OUT16(Ioc, B2_TI_CRTL, TIM_CLR_IRQ) ;
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pAC->Hwt.TActive = SK_FALSE ;
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}
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/*
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* Stop hardware timer and read time elapsed since last start.
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*
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* returns
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* The elapsed time since last start in units of 16us.
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*
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*/
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SK_U32 SkHwtRead(
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SK_AC *pAC, /* Adapters context */
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SK_IOC Ioc) /* IoContext */
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{
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SK_U32 TRead ;
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SK_U32 IStatus ;
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if (pAC->Hwt.TActive) {
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SkHwtStop(pAC,Ioc) ;
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SK_IN32(Ioc, B2_TI_VAL, &TRead);
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TRead /= SK_HWT_FAC;
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SK_IN32(Ioc, B0_ISRC, &IStatus);
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/* Check if timer expired (or wraparound). */
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if ((TRead > pAC->Hwt.TStart) || (IStatus & IS_TIMINT)) {
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SkHwtStop(pAC,Ioc) ;
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pAC->Hwt.TStop = pAC->Hwt.TStart ;
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} else {
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pAC->Hwt.TStop = pAC->Hwt.TStart - TRead ;
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}
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}
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return (pAC->Hwt.TStop) ;
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}
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/*
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* interrupt source= timer
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*/
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void SkHwtIsr(
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SK_AC *pAC, /* Adapters context */
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SK_IOC Ioc) /* IoContext */
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{
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SkHwtStop(pAC,Ioc);
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pAC->Hwt.TStop = pAC->Hwt.TStart;
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SkTimerDone(pAC,Ioc) ;
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}
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#endif /* CONFIG_SK98 */
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/* End of file */
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