mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-29 16:10:58 +00:00
42d1f0394b
- Added Motorola CPU 8540/8560 support (cpu/85xx) - Added Motorola MPC8540ADS board support (board/mpc8540ads) - Added Motorola MPC8560ADS board support (board/mpc8560ads) * Minor code cleanup
220 lines
4.7 KiB
C
220 lines
4.7 KiB
C
/******************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*
|
|
*
|
|
*
|
|
******************************************************************************/
|
|
|
|
|
|
#include <config.h>
|
|
|
|
#ifdef CONFIG_SK98
|
|
|
|
/*
|
|
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) ;
|
|
}
|
|
|
|
#endif /* CONFIG_SK98 */
|
|
|
|
/* End of file */
|