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Commit	Line	Data
	1	/*-
	2	* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
	3	* Copyright (c) 2008 The DragonFly Project.
	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	18	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	25	* SUCH DAMAGE.
	26	*/
	27
	28	/*
	29	* Timer device driver for power management events.
	30	* The code for suspend/resume is derived from APM device driver.
	31	*/
	32
	33	#include <sys/param.h>
	34	#include <sys/systm.h>
	35	#include <sys/bus.h>
	36	#include <sys/kernel.h>
	37	#include <sys/syslog.h>
	38	#include <sys/thread2.h>
	39	#include <machine/clock.h>
	40
	41	#include <bus/isa/isavar.h>
	42
	43	static devclass_t pmtimer_devclass;
	44
	45	/* reject any PnP devices for now */
	46	static struct isa_pnp_id pmtimer_ids[] = {
	47	{0}
	48	};
	49
	50	static int
	51	pmtimer_probe(device_t dev)
	52	{
	53
	54	if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) {
	55	return (ENXIO);
	56	}
	57
	58	/* only one instance always */
	59	return (device_get_unit(dev));
	60	}
	61
	62	static struct timeval suspend_time;
	63	static struct timeval diff_time;
	64
	65	static int
	66	pmtimer_suspend(device_t dev)
	67	{
	68	crit_enter();
	69	microtime(&diff_time);
	70	inittodr(0);
	71	microtime(&suspend_time);
	72	timevalsub(&diff_time, &suspend_time);
	73	crit_exit();
	74	return (0);
	75	}
	76
	77	static int
	78	pmtimer_resume(device_t dev)
	79	{
	80	u_int second, minute, hour;
	81	struct timeval resume_time;
	82
	83	/* modified for adjkerntz */
	84	crit_enter();
	85	timer_restore(); /* restore the all timers */
	86	inittodr(0); /* adjust time to RTC */
	87	microtime(&resume_time);
	88
	89	crit_exit();
	90	second = resume_time.tv_sec - suspend_time.tv_sec;
	91	hour = second / 3600;
	92	second %= 3600;
	93	minute = second / 60;
	94	second %= 60;
	95	log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
	96	hour, minute, second);
	97	return (0);
	98	}
	99
	100	/*
	101	* Because pmtimer is a static device that always exists under any attached
	102	* isa device, and not scanned by the isa device, we need an identify
	103	* function to install the device.
	104	*/
	105	static device_method_t pmtimer_methods[] = {
	106	/* Device interface */
	107	DEVMETHOD(device_identify, bus_generic_identify),
	108	DEVMETHOD(device_probe, pmtimer_probe),
	109	DEVMETHOD(device_attach, bus_generic_attach),
	110	DEVMETHOD(device_suspend, pmtimer_suspend),
	111	DEVMETHOD(device_resume, pmtimer_resume),
	112	{ 0, 0 }
	113	};
	114
	115	static driver_t pmtimer_driver = {
	116	"pmtimer",
	117	pmtimer_methods,
	118	1, /* no softc */
	119	};
	120
	121	DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);