patch-2.3.13 linux/drivers/char/hfmodem/refclock.c

• Lines: 155
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.12/linux/drivers/char/hfmodem/refclock.c
• Orig date: Thu Jul 8 15:42:20 1999

diff -u --recursive --new-file v2.3.12/linux/drivers/char/hfmodem/refclock.c linux/drivers/char/hfmodem/refclock.c
@@ -1,154 +0,0 @@
-/*****************************************************************************/
-
-/*
- *      refclock.c  --  Linux soundcard HF FSK driver,
- *                      Reference clock routines.
- *
- *      Copyright (C) 1997  Thomas Sailer (sailer@ife.ee.ethz.ch)
- *        Swiss Federal Institute of Technology (ETH), Electronics Lab
- *
- *      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.
- *
- *      This program is distributed in the hope that it will be useful,
- *      but WITHOUT ANY WARRANTY; without even the implied warranty of
- *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *      GNU General Public License for more details.
- *
- *      You should have received a copy of the GNU General Public License
- *      along with this program; if not, write to the Free Software
- *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- */
-
-/*****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/hfmodem.h>
-#include <asm/processor.h>
-
-/* --------------------------------------------------------------------- */
-
-/*
- * currently this module is supposed to support both module styles, i.e.
- * the old one present up to about 2.1.9, and the new one functioning
- * starting with 2.1.21. The reason is I have a kit allowing to compile
- * this module also under 2.0.x which was requested by several people.
- * This will go in 2.2
- */
-#include <linux/version.h>
-
-#if LINUX_VERSION_CODE >= 0x20123
-#include <linux/init.h>
-#else
-#define __init
-#define __initdata
-#define __initfunc(x) x
-#endif
-
-/* --------------------------------------------------------------------- */
-/*
- * command line params
- */
-
-static unsigned int scale_tvusec = 1UL<<24;
-
-#ifdef __i386__
-static unsigned int scale_rdtsc = 0;
-static int rdtsc_ok = 1;
-#endif /* __i386__ */
-
-/* --------------------------------------------------------------------- */
-
-#ifdef __i386__
-static void __init i386_capability(void)
-{
-	if (boot_cpu_data.x86_capability & X86_FEATURE_TSC)
-		rdtsc_ok = 1;
-	else
-		printk(KERN_INFO "%s: cpu does not support the rdtsc instruction\n", hfmodem_drvname);
-}
-#endif /* __i386__ */   
-
-/* --------------------------------------------------------------------- */
-
-void __init hfmodem_refclock_probe(void)
-{
-#ifdef __i386__
-	if (rdtsc_ok) {
-		rdtsc_ok = 0;
-		i386_capability();
-		if (rdtsc_ok) {
-			unsigned int tmp0, tmp1, tmp2, tmp3;
-			__asm__("rdtsc" : "=a" (tmp0), "=d" (tmp1));
-			__asm__("rdtsc" : "=a" (tmp2), "=d" (tmp3));
-			if (tmp0 == tmp2 && tmp1 == tmp3) {
-				rdtsc_ok = 0;
-				printk(KERN_WARNING "%s: rdtsc unusable, does not change\n",
-				       hfmodem_drvname);
-			}
-		}
-	}
-	printk(KERN_INFO "%s: using %s as timing source\n", hfmodem_drvname,
-	       rdtsc_ok ? "rdtsc" : "gettimeofday");
-#endif /* __i386__ */
-}
-
-/* --------------------------------------------------------------------- */
-
-void hfmodem_refclock_init(struct hfmodem_state *dev)
-{
-	struct timeval tv;
-
-	dev->clk.lasttime = 0;
-#ifdef __i386__
-	if (rdtsc_ok) {
-		__asm__("rdtsc;" : "=&d" (dev->clk.starttime_hi), "=&a" (dev->clk.starttime_lo));
-		return;
-	}
-#endif /* __i386__ */
-	do_gettimeofday(&tv);
-	dev->clk.last_tvusec = tv.tv_usec;
-	dev->clk.time_cnt = 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-hfmodem_time_t hfmodem_refclock_current(struct hfmodem_state *dev, hfmodem_time_t expected, int exp_valid)
-{
-	struct timeval tv;
-	hfmodem_time_t curtime;
-	long diff;
-
-#ifdef __i386__
-	if (rdtsc_ok) {
-		unsigned int tmp0, tmp1;
-		unsigned int tmp2, tmp3;
-		
-		__asm__("rdtsc;\n\t"
-			"subl %2,%%eax\n\t"
-			"sbbl %3,%%edx\n\t" : "=&a" (tmp0), "=&d" (tmp1) 
-			: "m" (dev->clk.starttime_lo), "m" (dev->clk.starttime_hi) : "ax", "dx");
-		__asm__("mull %1" : "=d" (tmp2) : "m" (scale_rdtsc), "a" (tmp0) : "ax");
-		__asm__("mull %1" : "=a" (tmp3) : "m" (scale_rdtsc), "a" (tmp1) : "dx");
-		curtime = tmp2 + tmp3;
-		goto time_known;
-	}
-#endif /* __i386__ */
-	do_gettimeofday(&tv);
-	dev->clk.time_cnt += (unsigned)(1000000 + tv.tv_usec - dev->clk.last_tvusec) % 1000000;
-	dev->clk.last_tvusec = tv.tv_usec;
-	curtime = (dev->clk.time_cnt * scale_tvusec) >> 24;
-  time_known:
-	if (exp_valid && abs(diff = (curtime - dev->clk.lasttime - expected)) >= 1000)
-		printk(KERN_DEBUG "%s: refclock adjustment %ld more than 1ms\n", 
-		       hfmodem_drvname, diff);
-	return (dev->clk.lasttime = curtime);
-}
-
-/* --------------------------------------------------------------------- */