mirror of https://gitee.com/openkylin/linux.git
172 lines
3.4 KiB
C
172 lines
3.4 KiB
C
/******************************************************************************
|
|
*
|
|
* Name: skgehwt.c
|
|
* Project: Gigabit Ethernet Adapters, Event Scheduler Module
|
|
* Version: $Revision: 1.15 $
|
|
* Date: $Date: 2003/09/16 13:41:23 $
|
|
* Purpose: Hardware Timer
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* (C)Copyright 1998-2002 SysKonnect GmbH.
|
|
* (C)Copyright 2002-2003 Marvell.
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Event queue and dispatcher
|
|
*/
|
|
#if (defined(DEBUG) || ((!defined(LINT)) && (!defined(SK_SLIM))))
|
|
static const char SysKonnectFileId[] =
|
|
"@(#) $Id: skgehwt.c,v 1.15 2003/09/16 13:41:23 rschmidt Exp $ (C) Marvell.";
|
|
#endif
|
|
|
|
#include "h/skdrv1st.h" /* Driver Specific Definitions */
|
|
#include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
|
|
|
|
#ifdef __C2MAN__
|
|
/*
|
|
* Hardware Timer function queue management.
|
|
*/
|
|
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_CTRL, 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_CTRL, TIM_STOP);
|
|
|
|
SK_OUT16(Ioc, B2_TI_CTRL, 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 wraped around) */
|
|
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 */
|