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2007-01-18dynamic properties for Icon widgetmichael4-51/+32
2007-01-17dynamic properties for GPO'smichael2-33/+26
2007-01-17removed DOS newlines again :-(michael1-60/+61
2007-01-17indentmichael2-9/+8
2007-01-17changed version number from 0.10.1-CVS to 0.10.1-SVNmichael2-12/+12
2007-01-16new driver 'HD44780-I2C'michael4-8/+97
2007-01-16Fix compilation of plugin_wireless.c with linux kernel 2.6.19 from Guillaume ...michael1-0/+1
2007-01-16Patch from Robert Buchholz: NULL driver link error fixed, m4 files included i...michael4-0/+8
2007-01-16patch from Mattia Jona-Lasinio for lcd-linux 0.12.0michael1-25/+24
2007-01-16svn keywordsmichael1-2/+2
2007-01-16removed some DOS newlinesmichael1-7/+8
2007-01-15minor cosmetic changes and fixesmichael5-11/+5
2007-01-14re-bootstrappedmichael4-10/+284
2007-01-14svn keywords correctedmichael1-1/+2
2007-01-14svn keywords correctedmichael6-47/+5
2007-01-14added svn properties and keywordsmichael14-320/+53
2007-01-14changed $Revision to $Revmichael28-28/+28
2007-01-14removed all tagsmichael125-6749/+0
2007-01-14svn properties fixedmichael132-153/+282
2007-01-14svn:ignore ported from .cvsignoremichael0-0/+0
2007-01-14switch from CVS to SVNmichael6-1658/+511
2006-10-01[lcd4linux @ 2006-10-01 11:54:38 by reinelt]reinelt3-60/+41
2006-09-29[lcd4linux @ 2006-09-29 04:48:21 by reinelt]reinelt8-240/pre { line-height: 125%; } td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; } span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; } td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; } span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; } .highlight .hll { background-color: #ffffcc } .highlight .c { color: #888888 } /* Comment */ .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */ .highlight .k { color: #008800; font-weight: bold } /* Keyword */ .highlight .ch { color: #888888 } /* Comment.Hashbang */ .highlight .cm { color: #888888 } /* Comment.Multiline */ .highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */ .highlight .cpf { color: #888888 } /* Comment.PreprocFile */ .highlight .c1 { color: #888888 } /* Comment.Single */ .highlight .cs { color: #cc0000; 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/* $Id$
 * $URL$
 *
 * short delays
 *
 * Copyright (C) 1999, 2000 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux 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, or (at your option)
 * any later version.
 *
 * LCD4Linux 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.
 *
 */

/* 
 *
 * exported fuctions:
 *
 * void udelay_init (void)
 *   selects delay method (gettimeofday() ord rdtsc() according
 *   to processor features
 *
 * unsigned long timing (const char *driver, const char *section, const char *name, const int defval, const char *unit);
 *   returns a timing value from config or the default value
 *
 * void udelay (unsigned long usec)
 *   delays program execution for usec micro
2-0/+4
2006-08-16[lcd4linux @ 2006-08-16 14:18:14 by reinelt]reinelt5-76/+100
2006-08-15[lcd4linux @ 2006-08-15 17:28:27 by harbaum]harbaum1-62/+115
2006-08-14[lcd4linux @ 2006-08-14 19:24:22 by harbaum]harbaum6-33/+137
generated by cgit v1.2.3 (git 2.39.1) at 2026-02-13 11:41:43 +0000
"> "cfg.h" #include "qprintf.h" #include "udelay.h" static unsigned int ticks_per_usec = 0; static void getCPUinfo(int *hasTSC, double *MHz) { int fd; char buffer[4096], *p; *hasTSC = 0; *MHz = -1; fd = open("/proc/cpuinfo", O_RDONLY); if (fd == -1) { error("udelay: open(/proc/cpuinfo) failed: %s", strerror(errno)); return; } if (read(fd, &buffer, sizeof(buffer) - 1) == -1) { error("udelay: read(/proc/cpuinfo) failed: %s", strerror(errno)); close(fd); return; } close(fd); p = strstr(buffer, "flags"); if (p == NULL) { info("udelay: /proc/cpuinfo has no 'flags' line"); } else { p = strstr(p, "tsc"); if (p == NULL) { info("udelay: CPU does not support Time Stamp Counter"); } else { info("udelay: CPU supports Time Stamp Counter"); *hasTSC = 1; } } p = strstr(buffer, "cpu MHz"); if (p == NULL) { info("udelay: /proc/cpuinfo has no 'cpu MHz' line"); } else { if (sscanf(p + 7, " : %lf", MHz) != 1) { error("udelay: parse(/proc/cpuinfo) failed: unknown 'cpu MHz' format"); *MHz = -1; } else { info("udelay: CPU runs at %f MHz", *MHz); } } } void udelay_init(void) { #ifdef HAVE_ASM_MSR_H int tsc; double mhz; getCPUinfo(&tsc, &mhz); if (tsc && mhz > 0.0) { ticks_per_usec = ceil(mhz); info("udelay: using TSC delay loop, %u ticks per microsecond", ticks_per_usec); } else #else error("udelay: The file 'include/asm/msr.h' was missing at compile time."); error("udelay: Even if your CPU supports TSC, it will not be used!"); error("udelay: You *really* should install msr.h and recompile LCD4linux!"); #endif { ticks_per_usec = 0; info("udelay: using gettimeofday() delay loop"); } } unsigned long timing(const char *driver, const char *section, const char *name, const int defval, const char *unit) { char sec[256]; int fuzz, val; qprintf(sec, sizeof(sec), "%s.Timing", section); /* fuzz all timings by given factor */ cfg_number(sec, "fuzz", 100, 1, -1, &fuzz); cfg_number(sec, name, defval, 0, -1, &val); val = val * fuzz / 100; if (val != defval) { if (fuzz != 100) { info("%s: timing: %6s = %5d %s (default %d %s, fuzz %d)", driver, name, val, unit, defval, unit, fuzz); } else { info("%s: timing: %6s = %5d %s (default %d %s)", driver, name, val, unit, defval, unit); } } else { info("%s: timing: %6s = %5d %s (default)", driver, name, defval, unit); } return val; } void ndelay(const unsigned long nsec) { #ifdef HAVE_ASM_MSR_H if (ticks_per_usec) { unsigned int t1, t2; unsigned long tsc; tsc = (nsec * ticks_per_usec + 999) / 1000; rdtscl(t1); do { rep_nop(); rdtscl(t2); } while ((t2 - t1) < tsc); } else #endif { struct timeval now, end; gettimeofday(&end, NULL); end.tv_usec += (nsec + 999) / 1000; while (end.tv_usec > 1000000) { end.tv_usec -= 1000000; end.tv_sec++; } do { rep_nop(); gettimeofday(&now, NULL); } while (now.tv_sec == end.tv_sec ? now.tv_usec < end.tv_usec : now.tv_sec < end.tv_sec); } }