pmtimer.c revision 82971
165865Siwasaki/*- 265865Siwasaki * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org> 365865Siwasaki * All rights reserved. 465865Siwasaki * 565865Siwasaki * Redistribution and use in source and binary forms, with or without 665865Siwasaki * modification, are permitted provided that the following conditions 765865Siwasaki * are met: 865865Siwasaki * 1. Redistributions of source code must retain the above copyright 965865Siwasaki * notice, this list of conditions and the following disclaimer. 1065865Siwasaki * 2. Redistributions in binary form must reproduce the above copyright 1165865Siwasaki * notice, this list of conditions and the following disclaimer in the 1265865Siwasaki * documentation and/or other materials provided with the distribution. 1365865Siwasaki * 1465865Siwasaki * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1565865Siwasaki * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1665865Siwasaki * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1765865Siwasaki * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1865865Siwasaki * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1965865Siwasaki * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2065865Siwasaki * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2165865Siwasaki * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2265865Siwasaki * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2365865Siwasaki * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2465865Siwasaki * SUCH DAMAGE. 2565865Siwasaki * 2665865Siwasaki * $FreeBSD: head/sys/i386/isa/pmtimer.c 82971 2001-09-04 16:02:06Z iwasaki $ 2765865Siwasaki */ 2865865Siwasaki 2965865Siwasaki/* 3065865Siwasaki * Timer device driver for power management events. 3165865Siwasaki * The code for suspend/resume is derived from APM device driver. 3265865Siwasaki */ 3365865Siwasaki 3465865Siwasaki#include <sys/param.h> 3565865Siwasaki#include <sys/systm.h> 3665865Siwasaki#include <sys/bus.h> 3765865Siwasaki#include <sys/kernel.h> 3865865Siwasaki#include <sys/syslog.h> 3965865Siwasaki#include <machine/clock.h> 4065865Siwasaki 4165865Siwasaki#include <isa/isavar.h> 4265865Siwasaki 4365865Siwasaki/* reject any PnP devices for now */ 4465865Siwasakistatic struct isa_pnp_id pmtimer_ids[] = { 4565865Siwasaki {0} 4665865Siwasaki}; 4765865Siwasaki 4865865Siwasakistatic int 4965865Siwasakipmtimer_probe(device_t dev) 5065865Siwasaki{ 5165865Siwasaki 5265865Siwasaki if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) { 5365865Siwasaki return (ENXIO); 5465865Siwasaki } 5565865Siwasaki 5665865Siwasaki /* only one instance always */ 5765865Siwasaki return (device_get_unit(dev)); 5865865Siwasaki} 5965865Siwasaki 6065865Siwasakistatic struct timeval suspend_time; 6165865Siwasakistatic struct timeval diff_time; 6265865Siwasaki 6365865Siwasakistatic int 6465865Siwasakipmtimer_suspend(device_t dev) 6565865Siwasaki{ 6665865Siwasaki int pl; 6765865Siwasaki 6865865Siwasaki pl = splsoftclock(); 6965865Siwasaki microtime(&diff_time); 7065865Siwasaki inittodr(0); 7165865Siwasaki microtime(&suspend_time); 7265865Siwasaki timevalsub(&diff_time, &suspend_time); 7365865Siwasaki splx(pl); 7465865Siwasaki return (0); 7565865Siwasaki} 7665865Siwasaki 7765865Siwasakistatic int 7865865Siwasakipmtimer_resume(device_t dev) 7965865Siwasaki{ 8065865Siwasaki int pl; 8165865Siwasaki u_int second, minute, hour; 8265865Siwasaki struct timeval resume_time, tmp_time; 8365865Siwasaki 8465865Siwasaki /* modified for adjkerntz */ 8565865Siwasaki pl = splsoftclock(); 8682971Siwasaki timer_restore(); /* restore the all timers */ 8765865Siwasaki inittodr(0); /* adjust time to RTC */ 8865865Siwasaki microtime(&resume_time); 8965865Siwasaki getmicrotime(&tmp_time); 9065865Siwasaki timevaladd(&tmp_time, &diff_time); 9165865Siwasaki 9265865Siwasaki#ifdef FIXME 9365865Siwasaki /* XXX THIS DOESN'T WORK!!! */ 9465865Siwasaki time = tmp_time; 9565865Siwasaki#endif 9665865Siwasaki 9765865Siwasaki#ifdef PMTIMER_FIXUP_CALLTODO 9865865Siwasaki /* Calculate the delta time suspended */ 9965865Siwasaki timevalsub(&resume_time, &suspend_time); 10065865Siwasaki /* Fixup the calltodo list with the delta time. */ 10165865Siwasaki adjust_timeout_calltodo(&resume_time); 10265865Siwasaki#endif /* PMTIMER_FIXUP_CALLTODOK */ 10365865Siwasaki splx(pl); 10465865Siwasaki#ifndef PMTIMER_FIXUP_CALLTODO 10565865Siwasaki second = resume_time.tv_sec - suspend_time.tv_sec; 10665865Siwasaki#else /* PMTIMER_FIXUP_CALLTODO */ 10765865Siwasaki /* 10865865Siwasaki * We've already calculated resume_time to be the delta between 10965865Siwasaki * the suspend and the resume. 11065865Siwasaki */ 11165865Siwasaki second = resume_time.tv_sec; 11265865Siwasaki#endif /* PMTIMER_FIXUP_CALLTODO */ 11365865Siwasaki hour = second / 3600; 11465865Siwasaki second %= 3600; 11565865Siwasaki minute = second / 60; 11665865Siwasaki second %= 60; 11765865Siwasaki log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n", 11865865Siwasaki hour, minute, second); 11965865Siwasaki return (0); 12065865Siwasaki} 12165865Siwasaki 12265865Siwasakistatic device_method_t pmtimer_methods[] = { 12365865Siwasaki /* Device interface */ 12465865Siwasaki DEVMETHOD(device_probe, pmtimer_probe), 12565865Siwasaki DEVMETHOD(device_attach, bus_generic_attach), 12665865Siwasaki DEVMETHOD(device_suspend, pmtimer_suspend), 12765865Siwasaki DEVMETHOD(device_resume, pmtimer_resume), 12865865Siwasaki { 0, 0 } 12965865Siwasaki}; 13065865Siwasaki 13165865Siwasakistatic driver_t pmtimer_driver = { 13265865Siwasaki "pmtimer", 13365865Siwasaki pmtimer_methods, 13465865Siwasaki 1, /* no softc */ 13565865Siwasaki}; 13665865Siwasaki 13765865Siwasakistatic devclass_t pmtimer_devclass; 13865865Siwasaki 13965865SiwasakiDRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0); 140