1 /******************************************************************************
4 * Project: GEnesis, PCI Gigabit Ethernet Adapter
7 * Purpose: Hardware Timer.
9 ******************************************************************************/
11 /******************************************************************************
13 * (C)Copyright 1998,1999 SysKonnect,
14 * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * The information in this file is provided "AS IS" without warranty.
23 ******************************************************************************/
25 /******************************************************************************
30 * Revision 1.1 2007-03-09 09:43:58 lothar
33 * Revision 1.13 1999/11/22 13:31:12 cgoos
34 * Changed license header to GPL.
36 * Revision 1.12 1998/10/15 15:11:34 gklug
37 * fix: ID_sccs to SysKonnectFileId
39 * Revision 1.11 1998/10/08 15:27:51 gklug
40 * chg: correction factor is host clock dependent
42 * Revision 1.10 1998/09/15 14:18:31 cgoos
43 * Changed more BOOLEANs to SK_xxx
45 * Revision 1.9 1998/09/15 14:16:06 cgoos
46 * Changed line 107: FALSE to SK_FALSE
48 * Revision 1.8 1998/08/24 13:04:44 gklug
51 * Revision 1.7 1998/08/19 09:50:49 gklug
52 * fix: remove struct keyword from c-code (see CCC) add typedefs
54 * Revision 1.6 1998/08/17 09:59:02 gklug
57 * Revision 1.5 1998/08/14 07:09:10 gklug
60 * Revision 1.4 1998/08/10 14:14:52 gklug
61 * rmv: unneccessary SK_ADDR macro
63 * Revision 1.3 1998/08/07 12:53:44 gklug
64 * fix: first compiled version
66 * Revision 1.2 1998/08/07 09:19:29 gklug
67 * adapt functions to the C coding conventions
68 * rmv unneccessary functions.
70 * Revision 1.1 1998/08/05 11:28:36 gklug
71 * first version: adapted from SMT/FDDI
76 ******************************************************************************/
84 Event queue and dispatcher
86 static const char SysKonnectFileId[] =
89 #include "h/skdrv1st.h" /* Driver Specific Definitions */
90 #include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
94 Hardware Timer function queue management.
104 * Prototypes of local functions.
106 #define SK_HWT_MAX (65000)
108 /* correction factor */
109 #define SK_HWT_FAC (1000 * (SK_U32)pAC->GIni.GIHstClkFact / 100)
112 * Initialize hardware timer.
114 * Must be called during init level 1.
117 SK_AC *pAC, /* Adapters context */
118 SK_IOC Ioc) /* IoContext */
120 pAC->Hwt.TStart = 0 ;
122 pAC->Hwt.TActive = SK_FALSE ;
129 * Start hardware timer (clock ticks are 16us).
133 SK_AC *pAC, /* Adapters context */
134 SK_IOC Ioc, /* IoContext */
135 SK_U32 Time) /* Time in units of 16us to load the timer with. */
139 if (Time > SK_HWT_MAX)
142 pAC->Hwt.TStart = Time ;
143 pAC->Hwt.TStop = 0L ;
155 SK_OUT32(Ioc, B2_TI_INI, Cnt * SK_HWT_FAC) ;
156 SK_OUT16(Ioc, B2_TI_CRTL, TIM_START) ; /* Start timer. */
158 pAC->Hwt.TActive = SK_TRUE ;
162 * Stop hardware timer.
163 * and clear the timer IRQ
166 SK_AC *pAC, /* Adapters context */
167 SK_IOC Ioc) /* IoContext */
169 SK_OUT16(Ioc, B2_TI_CRTL, TIM_STOP) ;
170 SK_OUT16(Ioc, B2_TI_CRTL, TIM_CLR_IRQ) ;
172 pAC->Hwt.TActive = SK_FALSE ;
177 * Stop hardware timer and read time elapsed since last start.
180 * The elapsed time since last start in units of 16us.
184 SK_AC *pAC, /* Adapters context */
185 SK_IOC Ioc) /* IoContext */
190 if (pAC->Hwt.TActive) {
193 SK_IN32(Ioc, B2_TI_VAL, &TRead);
196 SK_IN32(Ioc, B0_ISRC, &IStatus);
198 /* Check if timer expired (or wraparound). */
199 if ((TRead > pAC->Hwt.TStart) || (IStatus & IS_TIMINT)) {
201 pAC->Hwt.TStop = pAC->Hwt.TStart ;
203 pAC->Hwt.TStop = pAC->Hwt.TStart - TRead ;
206 return (pAC->Hwt.TStop) ;
210 * interrupt source= timer
213 SK_AC *pAC, /* Adapters context */
214 SK_IOC Ioc) /* IoContext */
217 pAC->Hwt.TStop = pAC->Hwt.TStart;
218 SkTimerDone(pAC,Ioc) ;
221 #endif /* CONFIG_SK98 */