| [18] | 1 | /* $Id: timer.c,v 1.1.1.1 2003/07/02 13:57:04 eleph Exp $ */
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| 2 | /*
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| 3 | * OS/2 implementation of Linux timer kernel functions
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| 4 | *
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| 5 | * (C) 2000-2002 InnoTek Systemberatung GmbH
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| 6 | * (C) 2000-2001 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | *
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| 8 | * This program is free software; you can redistribute it and/or
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| 9 | * modify it under the terms of the GNU General Public License as
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| 10 | * published by the Free Software Foundation; either version 2 of
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| 11 | * the License, or (at your option) any later version.
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| 12 | *
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| 13 | * This program is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | * GNU General Public License for more details.
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| 17 | *
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| 18 | * You should have received a copy of the GNU General Public
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| 19 | * License along with this program; if not, write to the Free
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| 20 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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| 21 | * USA.
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| 22 | *
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| 23 | */
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| 24 |
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| 25 | #include "linux.h"
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| 26 | #include <linux/init.h>
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| 27 | #include <linux/poll.h>
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| 28 | #include <asm/uaccess.h>
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| 29 | #include <asm/hardirq.h>
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| 30 | #include <asm/io.h>
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| 31 | #include <linux/time.h>
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| 32 |
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| 33 | #define LINUX
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| 34 | #include <ossidc.h>
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| 35 | #include <irqos2.h>
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| 36 | #include <dbgos2.h>
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| 37 |
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| 38 | static long jiffiems = 1000/HZ;
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| 39 | static long lasttime = 0;
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| 40 | unsigned long volatile jiffies = 0;
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| 41 |
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| 42 | //******************************************************************************
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| 43 | //Timer handler that is called on each timer tick (32 times/second)
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| 44 | //******************************************************************************
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| 45 | void ALSA_TIMER()
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| 46 | {
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| 47 | long delta, newtime, remainder;
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| 48 |
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| 49 | newtime = os2gettimemsec();
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| 50 | delta = newtime - lasttime;
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| 51 |
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| 52 | jiffies += delta/jiffiems;
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| 53 | remainder = delta%jiffiems;
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| 54 |
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| 55 | lasttime = newtime - remainder;
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| 56 | }
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| 57 | //******************************************************************************
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| 58 | //timeout is in 'jiffies', linux talk for units of 1000/HZ ms
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| 59 | //******************************************************************************
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| 60 | signed long schedule_timeout(signed long timeout)
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| 61 | {
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| 62 | dprintf2(("schedule_timeout %d jiffies %x", timeout, jiffies));
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| 63 | mdelay(timeout*jiffiems);
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| 64 | return 0;
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| 65 | }
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| 66 | //******************************************************************************
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| 67 | //iodelay is in 500ns units
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| 68 | void iodelay32(unsigned long);
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| 69 | #pragma aux iodelay32 parm nomemory [ecx] modify nomemory exact [eax ecx];
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| 70 | //******************************************************************************
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| 71 | //microsecond delay
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| 72 | //******************************************************************************
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| 73 | void __udelay(unsigned long usecs)
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| 74 | {
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| 75 | if(usecs == 0) {
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| 76 | DebugInt3();
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| 77 | usecs = 1;
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| 78 | }
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| 79 | iodelay32(usecs*2);
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| 80 | }
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| 81 | //******************************************************************************
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| 82 | //millisecond delay
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| 83 | //******************************************************************************
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| 84 | void mdelay(unsigned long msecs)
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| 85 | {
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| 86 | if(msecs == 0) {
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| 87 | DebugInt3();
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| 88 | msecs = 1;
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| 89 | }
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| 90 | iodelay32(msecs*2*1000);
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| 91 | }
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| 92 | //******************************************************************************
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| 93 | //******************************************************************************
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| 94 | void do_gettimeofday(struct timeval *tv)
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| 95 | {
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| 96 | tv->tv_sec = 0; //os2gettimesec();
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| 97 | tv->tv_usec = os2gettimemsec() * 1000;
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| 98 | }
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| 99 | //******************************************************************************
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| 100 | //******************************************************************************
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| 101 | void add_timer(struct timer_list * timer)
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| 102 | {
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| 103 |
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| 104 | }
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| 105 | //******************************************************************************
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| 106 | //******************************************************************************
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| 107 | int del_timer(struct timer_list * timer)
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| 108 | {
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| 109 | return 0;
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| 110 | }
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| 111 | //******************************************************************************
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| 112 | /*
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| 113 | * mod_timer is a more efficient way to update the expire field of an
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| 114 | * active timer (if the timer is inactive it will be activated)
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| 115 | * mod_timer(a,b) is equivalent to del_timer(a); a->expires = b; add_timer(a)
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| 116 | */
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| 117 | void mod_timer(struct timer_list *timer, unsigned long expires)
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| 118 | {
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| 119 |
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| 120 | }
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| 121 | //******************************************************************************
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| 122 | //******************************************************************************
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| 123 |
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