496027bf08
- Add support for calling 32-bit code in other segments - Add support for calling 16-bit protected mode code Update APM to use this facility. Submitted by: jlemon
1242 lines
28 KiB
C
1242 lines
28 KiB
C
/*
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* APM (Advanced Power Management) BIOS Device Driver
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*
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* Copyright (c) 1994 UKAI, Fumitoshi.
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* Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
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* Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
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* Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
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*
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* This software may be used, modified, copied, and distributed, in
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* both source and binary form provided that the above copyright and
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* these terms are retained. Under no circumstances is the author
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* responsible for the proper functioning of this software, nor does
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* the author assume any responsibility for damages incurred with its
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* use.
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*
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* Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
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*
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* $Id: apm.c,v 1.93 1999/07/28 20:20:29 msmith Exp $
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*/
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#include "opt_devfs.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <sys/time.h>
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#include <sys/reboot.h>
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#include <sys/bus.h>
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#include <sys/select.h>
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#include <sys/poll.h>
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#include <sys/fcntl.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/signalvar.h>
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#include <machine/apm_bios.h>
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#include <machine/segments.h>
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#include <machine/clock.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <sys/syslog.h>
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#include <machine/pc/bios.h>
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#include <machine/vm86.h>
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static int apm_display __P((int newstate));
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static void apm_resume __P((void));
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static int apm_bioscall(void);
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static u_long apm_version;
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#define APM_NEVENTS 16
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#define APM_NPMEV 13
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int apm_evindex;
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/* static data */
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struct apm_softc {
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int initialized, active, bios_busy;
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int always_halt_cpu, slow_idle_cpu;
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int disabled, disengaged;
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u_int minorversion, majorversion;
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u_int intversion, connectmode;
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struct bios_args bios;
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struct apmhook sc_suspend;
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struct apmhook sc_resume;
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struct selinfo sc_rsel;
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int sc_flags;
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int event_count;
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int event_ptr;
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struct apm_event_info event_list[APM_NEVENTS];
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u_char event_filter[APM_NPMEV];
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#ifdef DEVFS
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void *sc_devfs_token;
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#endif
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};
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#define SCFLAG_ONORMAL 0x0000001
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#define SCFLAG_OCTL 0x0000002
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#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
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#define APMDEV(dev) (minor(dev)&0x0f)
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#define APMDEV_NORMAL 0
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#define APMDEV_CTL 8
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static struct apm_softc apm_softc;
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static struct apmhook *hook[NAPM_HOOK]; /* XXX */
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#define is_enabled(foo) ((foo) ? "enabled" : "disabled")
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/* Map version number to integer (keeps ordering of version numbers) */
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#define INTVERSION(major, minor) ((major)*100 + (minor))
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static struct callout_handle apm_timeout_ch =
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CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
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static timeout_t apm_timeout;
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static d_open_t apmopen;
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static d_close_t apmclose;
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static d_write_t apmwrite;
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static d_ioctl_t apmioctl;
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static d_poll_t apmpoll;
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#define CDEV_MAJOR 39
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static struct cdevsw apm_cdevsw = {
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/* open */ apmopen,
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/* close */ apmclose,
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/* read */ noread,
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/* write */ apmwrite,
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/* ioctl */ apmioctl,
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/* stop */ nostop,
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/* reset */ noreset,
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/* devtotty */ nodevtotty,
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/* poll */ apmpoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "apm",
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/* parms */ noparms,
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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/* maxio */ 0,
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/* bmaj */ -1
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};
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static int
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apm_bioscall(void)
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{
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struct apm_softc *sc = &apm_softc;
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int errno = 0;
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sc->bios_busy = 1;
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if (sc->connectmode == APM_PROT32CONNECT) {
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set_bios_selectors(&sc->bios.seg,
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BIOSCODE_FLAG | BIOSDATA_FLAG);
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errno = bios32(&sc->bios.r,
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sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
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} else {
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errno = bios16(&sc->bios, NULL);
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}
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sc->bios_busy = 0;
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return (errno);
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}
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/* enable/disable power management */
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static int
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apm_enable_disable_pm(int enable)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
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if (sc->intversion >= INTVERSION(1, 1))
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sc->bios.r.ebx = PMDV_ALLDEV;
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else
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sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
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sc->bios.r.ecx = enable;
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sc->bios.r.edx = 0;
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return (apm_bioscall());
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}
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/* register driver version (APM 1.1 or later) */
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static int
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apm_driver_version(int version)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
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sc->bios.r.ebx = 0x0;
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sc->bios.r.ecx = version;
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sc->bios.r.edx = 0;
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if (apm_bioscall() == 0 && sc->bios.r.eax == version)
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return (0);
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return (1);
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}
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/* engage/disengage power management (APM 1.1 or later) */
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static int
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apm_engage_disengage_pm(int engage)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
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sc->bios.r.ebx = PMDV_ALLDEV;
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sc->bios.r.ecx = engage;
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sc->bios.r.edx = 0;
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return (apm_bioscall());
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}
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/* get PM event */
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static u_int
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apm_getevent(void)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
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sc->bios.r.ebx = 0;
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sc->bios.r.ecx = 0;
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sc->bios.r.edx = 0;
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if (apm_bioscall())
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return (PMEV_NOEVENT);
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return (sc->bios.r.ebx & 0xffff);
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}
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/* suspend entire system */
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static int
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apm_suspend_system(int state)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
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sc->bios.r.ebx = PMDV_ALLDEV;
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sc->bios.r.ecx = state;
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sc->bios.r.edx = 0;
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if (apm_bioscall()) {
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printf("Entire system suspend failure: errcode = %d\n",
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0xff & (sc->bios.r.eax >> 8));
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return 1;
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}
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return 0;
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}
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/* Display control */
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/*
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* Experimental implementation: My laptop machine can't handle this function
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* If your laptop can control the display via APM, please inform me.
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* HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
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*/
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static int
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apm_display(int newstate)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
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sc->bios.r.ebx = PMDV_DISP0;
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sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
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sc->bios.r.edx = 0;
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if (apm_bioscall()) {
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printf("Display off failure: errcode = %d\n",
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0xff & (sc->bios.r.eax >> 8));
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return 1;
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}
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return 0;
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}
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/*
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* Turn off the entire system.
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*/
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static void
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apm_power_off(int howto, void *junk)
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{
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struct apm_softc *sc = &apm_softc;
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/* Not halting powering off, or not active */
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if (!(howto & RB_POWEROFF) || !apm_softc.active)
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return;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
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sc->bios.r.ebx = PMDV_ALLDEV;
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sc->bios.r.ecx = PMST_OFF;
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sc->bios.r.edx = 0;
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(void) apm_bioscall();
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}
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/* APM Battery low handler */
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static void
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apm_battery_low(void)
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{
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printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
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}
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/* APM hook manager */
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static struct apmhook *
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apm_add_hook(struct apmhook **list, struct apmhook *ah)
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{
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int s;
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struct apmhook *p, *prev;
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#ifdef APM_DEBUG
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printf("Add hook \"%s\"\n", ah->ah_name);
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#endif
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s = splhigh();
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if (ah == NULL)
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panic("illegal apm_hook!");
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prev = NULL;
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for (p = *list; p != NULL; prev = p, p = p->ah_next)
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if (p->ah_order > ah->ah_order)
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break;
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if (prev == NULL) {
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ah->ah_next = *list;
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*list = ah;
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} else {
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ah->ah_next = prev->ah_next;
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prev->ah_next = ah;
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}
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splx(s);
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return ah;
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}
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static void
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apm_del_hook(struct apmhook **list, struct apmhook *ah)
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{
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int s;
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struct apmhook *p, *prev;
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s = splhigh();
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prev = NULL;
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for (p = *list; p != NULL; prev = p, p = p->ah_next)
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if (p == ah)
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goto deleteit;
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panic("Tried to delete unregistered apm_hook.");
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goto nosuchnode;
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deleteit:
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if (prev != NULL)
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prev->ah_next = p->ah_next;
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else
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*list = p->ah_next;
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nosuchnode:
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splx(s);
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}
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/* APM driver calls some functions automatically */
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static void
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apm_execute_hook(struct apmhook *list)
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{
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struct apmhook *p;
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for (p = list; p != NULL; p = p->ah_next) {
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#ifdef APM_DEBUG
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printf("Execute APM hook \"%s.\"\n", p->ah_name);
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#endif
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if ((*(p->ah_fun))(p->ah_arg))
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printf("Warning: APM hook \"%s\" failed", p->ah_name);
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}
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}
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/* establish an apm hook */
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struct apmhook *
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apm_hook_establish(int apmh, struct apmhook *ah)
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{
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if (apmh < 0 || apmh >= NAPM_HOOK)
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return NULL;
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return apm_add_hook(&hook[apmh], ah);
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}
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/* disestablish an apm hook */
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void
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apm_hook_disestablish(int apmh, struct apmhook *ah)
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{
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if (apmh < 0 || apmh >= NAPM_HOOK)
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return;
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apm_del_hook(&hook[apmh], ah);
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}
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static struct timeval suspend_time;
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static struct timeval diff_time;
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static int
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apm_default_resume(void *arg)
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{
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int pl;
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u_int second, minute, hour;
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struct timeval resume_time, tmp_time;
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/* modified for adjkerntz */
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pl = splsoftclock();
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inittodr(0); /* adjust time to RTC */
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microtime(&resume_time);
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getmicrotime(&tmp_time);
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timevaladd(&tmp_time, &diff_time);
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#ifdef FIXME
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/* XXX THIS DOESN'T WORK!!! */
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time = tmp_time;
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#endif
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#ifdef APM_FIXUP_CALLTODO
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/* Calculate the delta time suspended */
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timevalsub(&resume_time, &suspend_time);
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/* Fixup the calltodo list with the delta time. */
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adjust_timeout_calltodo(&resume_time);
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#endif /* APM_FIXUP_CALLTODOK */
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splx(pl);
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#ifndef APM_FIXUP_CALLTODO
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second = resume_time.tv_sec - suspend_time.tv_sec;
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#else /* APM_FIXUP_CALLTODO */
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/*
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* We've already calculated resume_time to be the delta between
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* the suspend and the resume.
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*/
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second = resume_time.tv_sec;
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#endif /* APM_FIXUP_CALLTODO */
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hour = second / 3600;
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second %= 3600;
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minute = second / 60;
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second %= 60;
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log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n",
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hour, minute, second);
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return 0;
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}
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static int
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apm_default_suspend(void *arg)
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{
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int pl;
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pl = splsoftclock();
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microtime(&diff_time);
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inittodr(0);
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microtime(&suspend_time);
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timevalsub(&diff_time, &suspend_time);
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splx(pl);
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return 0;
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}
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static int apm_record_event __P((struct apm_softc *, u_int));
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static void apm_processevent(void);
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static u_int apm_op_inprog = 0;
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static void
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apm_lastreq_notify(void)
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{
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struct apm_softc *sc = &apm_softc;
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sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
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sc->bios.r.ebx = PMDV_ALLDEV;
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sc->bios.r.ecx = PMST_LASTREQNOTIFY;
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sc->bios.r.edx = 0;
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apm_bioscall();
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}
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|
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static int
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apm_lastreq_rejected(void)
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{
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struct apm_softc *sc = &apm_softc;
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|
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if (apm_op_inprog == 0) {
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return 1; /* no operation in progress */
|
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}
|
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|
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sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
|
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sc->bios.r.ebx = PMDV_ALLDEV;
|
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sc->bios.r.ecx = PMST_LASTREQREJECT;
|
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sc->bios.r.edx = 0;
|
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|
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if (apm_bioscall()) {
|
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#ifdef APM_DEBUG
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printf("apm_lastreq_rejected: failed\n");
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#endif
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return 1;
|
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}
|
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apm_op_inprog = 0;
|
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return 0;
|
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}
|
|
|
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/*
|
|
* Public interface to the suspend/resume:
|
|
*
|
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* Execute suspend and resume hook before and after sleep, respectively.
|
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*
|
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*/
|
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|
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void
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apm_suspend(int state)
|
|
{
|
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struct apm_softc *sc = &apm_softc;
|
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int error;
|
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|
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if (!sc)
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return;
|
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|
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apm_op_inprog = 0;
|
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|
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if (sc->initialized) {
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error = DEVICE_SUSPEND(root_bus);
|
|
/*
|
|
* XXX Shouldn't ignore the error like this, but should
|
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* instead fix the newbus code. Until that happens,
|
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* I'm doing this to get suspend working again.
|
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*/
|
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if (error)
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printf("DEVICE_SUSPEND error %d, ignored\n", error);
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apm_execute_hook(hook[APM_HOOK_SUSPEND]);
|
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if (apm_suspend_system(state) == 0)
|
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apm_processevent();
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else
|
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/* Failure, 'resume' the system again */
|
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apm_execute_hook(hook[APM_HOOK_RESUME]);
|
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}
|
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}
|
|
|
|
void
|
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apm_resume(void)
|
|
{
|
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struct apm_softc *sc = &apm_softc;
|
|
|
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if (!sc)
|
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return;
|
|
|
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if (sc->initialized) {
|
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DEVICE_RESUME(root_bus);
|
|
apm_execute_hook(hook[APM_HOOK_RESUME]);
|
|
}
|
|
}
|
|
|
|
|
|
/* get APM information */
|
|
static int
|
|
apm_get_info(apm_info_t aip)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
|
|
sc->bios.r.ebx = PMDV_ALLDEV;
|
|
sc->bios.r.ecx = 0;
|
|
sc->bios.r.edx = 0xffff; /* default to unknown battery time */
|
|
|
|
if (apm_bioscall())
|
|
return 1;
|
|
|
|
aip->ai_infoversion = 1;
|
|
aip->ai_acline = (sc->bios.r.ebx >> 8) & 0xff;
|
|
aip->ai_batt_stat = sc->bios.r.ebx & 0xff;
|
|
aip->ai_batt_life = sc->bios.r.ecx & 0xff;
|
|
aip->ai_major = (u_int)sc->majorversion;
|
|
aip->ai_minor = (u_int)sc->minorversion;
|
|
aip->ai_status = (u_int)sc->active;
|
|
sc->bios.r.edx &= 0xffff;
|
|
if (sc->bios.r.edx == 0xffff) /* Time is unknown */
|
|
aip->ai_batt_time = -1;
|
|
else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
|
|
aip->ai_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
|
|
else /* Time is in seconds */
|
|
aip->ai_batt_time = sc->bios.r.edx;
|
|
|
|
sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
|
|
sc->bios.r.ebx = 0;
|
|
sc->bios.r.ecx = 0;
|
|
sc->bios.r.edx = 0;
|
|
if (apm_bioscall()) {
|
|
aip->ai_batteries = -1; /* Unknown */
|
|
aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
|
|
} else {
|
|
aip->ai_batteries = sc->bios.r.ebx & 0xff;
|
|
aip->ai_capabilities = sc->bios.r.ecx & 0xf;
|
|
}
|
|
|
|
bzero(aip->ai_spare, sizeof aip->ai_spare);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* inform APM BIOS that CPU is idle */
|
|
void
|
|
apm_cpu_idle(void)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
if (sc->active) {
|
|
|
|
sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
|
|
sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
|
|
(void) apm_bioscall();
|
|
}
|
|
/*
|
|
* Some APM implementation halts CPU in BIOS, whenever
|
|
* "CPU-idle" function are invoked, but swtch() of
|
|
* FreeBSD halts CPU, therefore, CPU is halted twice
|
|
* in the sched loop. It makes the interrupt latency
|
|
* terribly long and be able to cause a serious problem
|
|
* in interrupt processing. We prevent it by removing
|
|
* "hlt" operation from swtch() and managed it under
|
|
* APM driver.
|
|
*/
|
|
if (!sc->active || sc->always_halt_cpu)
|
|
__asm("hlt"); /* wait for interrupt */
|
|
}
|
|
|
|
/* inform APM BIOS that CPU is busy */
|
|
void
|
|
apm_cpu_busy(void)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
/*
|
|
* The APM specification says this is only necessary if your BIOS
|
|
* slows down the processor in the idle task, otherwise it's not
|
|
* necessary.
|
|
*/
|
|
if (sc->slow_idle_cpu && sc->active) {
|
|
|
|
sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
|
|
sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
|
|
apm_bioscall();
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* APM timeout routine:
|
|
*
|
|
* This routine is automatically called by timer once per second.
|
|
*/
|
|
|
|
static void
|
|
apm_timeout(void *dummy)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
if (apm_op_inprog)
|
|
apm_lastreq_notify();
|
|
|
|
if (!sc->bios_busy)
|
|
apm_processevent();
|
|
|
|
if (sc->active == 1)
|
|
/* Run slightly more oftan than 1 Hz */
|
|
apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 );
|
|
}
|
|
|
|
/* enable APM BIOS */
|
|
static void
|
|
apm_event_enable(void)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
#ifdef APM_DEBUG
|
|
printf("called apm_event_enable()\n");
|
|
#endif
|
|
if (sc->initialized) {
|
|
sc->active = 1;
|
|
apm_timeout(sc);
|
|
}
|
|
}
|
|
|
|
/* disable APM BIOS */
|
|
static void
|
|
apm_event_disable(void)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
#ifdef APM_DEBUG
|
|
printf("called apm_event_disable()\n");
|
|
#endif
|
|
if (sc->initialized) {
|
|
untimeout(apm_timeout, NULL, apm_timeout_ch);
|
|
sc->active = 0;
|
|
}
|
|
}
|
|
|
|
/* halt CPU in scheduling loop */
|
|
static void
|
|
apm_halt_cpu(void)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
if (sc->initialized)
|
|
sc->always_halt_cpu = 1;
|
|
}
|
|
|
|
/* don't halt CPU in scheduling loop */
|
|
static void
|
|
apm_not_halt_cpu(void)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
if (sc->initialized)
|
|
sc->always_halt_cpu = 0;
|
|
}
|
|
|
|
/* device driver definitions */
|
|
|
|
/*
|
|
* probe for APM BIOS
|
|
*/
|
|
static int
|
|
apm_probe(device_t dev)
|
|
{
|
|
#define APM_KERNBASE KERNBASE
|
|
struct vm86frame vmf;
|
|
struct apm_softc *sc = &apm_softc;
|
|
int disabled, flags;
|
|
|
|
if (resource_int_value("apm", 0, "disabled", &disabled) == 0
|
|
&& disabled != 0)
|
|
return ENXIO;
|
|
|
|
device_set_desc(dev, "APM BIOS");
|
|
|
|
if ( device_get_unit(dev) > 0 ) {
|
|
printf("apm: Only one APM driver supported.\n");
|
|
return ENXIO;
|
|
}
|
|
|
|
if (resource_int_value("apm", 0, "flags", &flags) != 0)
|
|
flags = 0;
|
|
|
|
bzero(&vmf, sizeof(struct vm86frame)); /* safety */
|
|
bzero(&apm_softc, sizeof(apm_softc));
|
|
vmf.vmf_ah = APM_BIOS;
|
|
vmf.vmf_al = APM_INSTCHECK;
|
|
vmf.vmf_bx = 0;
|
|
if (vm86_intcall(APM_INT, &vmf))
|
|
return ENXIO; /* APM not found */
|
|
if (vmf.vmf_bx != 0x504d) {
|
|
printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
|
|
return ENXIO;
|
|
}
|
|
if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
|
|
printf("apm: protected mode connections are not supported\n");
|
|
return ENXIO;
|
|
}
|
|
|
|
apm_version = vmf.vmf_ax;
|
|
sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
|
|
sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
|
|
sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
|
|
|
|
vmf.vmf_ah = APM_BIOS;
|
|
vmf.vmf_al = APM_DISCONNECT;
|
|
vmf.vmf_bx = 0;
|
|
vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
|
|
|
|
if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
|
|
vmf.vmf_ah = APM_BIOS;
|
|
vmf.vmf_al = APM_PROT32CONNECT;
|
|
vmf.vmf_bx = 0;
|
|
if (vm86_intcall(APM_INT, &vmf)) {
|
|
printf("apm: 32-bit connection error.\n");
|
|
return (ENXIO);
|
|
}
|
|
sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
|
|
sc->bios.seg.code32.limit = 0xffff;
|
|
sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
|
|
sc->bios.seg.code16.limit = vmf.vmf_si;
|
|
sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
|
|
sc->bios.seg.data.limit = vmf.vmf_di;
|
|
sc->bios.entry = vmf.vmf_ebx;
|
|
sc->connectmode = APM_PROT32CONNECT;
|
|
} else {
|
|
/* use 16-bit connection */
|
|
vmf.vmf_ah = APM_BIOS;
|
|
vmf.vmf_al = APM_PROT16CONNECT;
|
|
vmf.vmf_bx = 0;
|
|
if (vm86_intcall(APM_INT, &vmf)) {
|
|
printf("apm: 16-bit connection error.\n");
|
|
return (ENXIO);
|
|
}
|
|
sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
|
|
sc->bios.seg.code16.limit = vmf.vmf_si;
|
|
sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
|
|
sc->bios.seg.data.limit = vmf.vmf_di;
|
|
sc->bios.entry = vmf.vmf_bx;
|
|
sc->connectmode = APM_PROT16CONNECT;
|
|
}
|
|
if (apm_version == 0x100) {
|
|
/* APM v1.0 does not set SI/DI */
|
|
sc->bios.seg.code16.limit = 0xffff;
|
|
sc->bios.seg.data.limit = 0xffff;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* return 0 if the user will notice and handle the event,
|
|
* return 1 if the kernel driver should do so.
|
|
*/
|
|
static int
|
|
apm_record_event(struct apm_softc *sc, u_int event_type)
|
|
{
|
|
struct apm_event_info *evp;
|
|
|
|
if ((sc->sc_flags & SCFLAG_OPEN) == 0)
|
|
return 1; /* no user waiting */
|
|
if (sc->event_count == APM_NEVENTS)
|
|
return 1; /* overflow */
|
|
if (sc->event_filter[event_type] == 0)
|
|
return 1; /* not registered */
|
|
evp = &sc->event_list[sc->event_ptr];
|
|
sc->event_count++;
|
|
sc->event_ptr++;
|
|
sc->event_ptr %= APM_NEVENTS;
|
|
evp->type = event_type;
|
|
evp->index = ++apm_evindex;
|
|
selwakeup(&sc->sc_rsel);
|
|
return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
|
|
}
|
|
|
|
/* Process APM event */
|
|
static void
|
|
apm_processevent(void)
|
|
{
|
|
int apm_event;
|
|
struct apm_softc *sc = &apm_softc;
|
|
|
|
#ifdef APM_DEBUG
|
|
# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
|
|
printf("Received APM Event: " #symbol "\n");
|
|
#else
|
|
# define OPMEV_DEBUGMESSAGE(symbol) case symbol:
|
|
#endif
|
|
do {
|
|
apm_event = apm_getevent();
|
|
switch (apm_event) {
|
|
OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
|
|
if (apm_op_inprog == 0) {
|
|
apm_op_inprog++;
|
|
if (apm_record_event(sc, apm_event)) {
|
|
apm_suspend(PMST_STANDBY);
|
|
}
|
|
}
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
|
|
apm_lastreq_notify();
|
|
if (apm_op_inprog == 0) {
|
|
apm_op_inprog++;
|
|
if (apm_record_event(sc, apm_event)) {
|
|
apm_suspend(PMST_SUSPEND);
|
|
}
|
|
}
|
|
return; /* XXX skip the rest */
|
|
OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
|
|
apm_lastreq_notify();
|
|
if (apm_op_inprog == 0) {
|
|
apm_op_inprog++;
|
|
if (apm_record_event(sc, apm_event)) {
|
|
apm_suspend(PMST_SUSPEND);
|
|
}
|
|
}
|
|
return; /* XXX skip the rest */
|
|
OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
|
|
apm_suspend(PMST_SUSPEND);
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
|
|
apm_record_event(sc, apm_event);
|
|
apm_resume();
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
|
|
apm_record_event(sc, apm_event);
|
|
apm_resume();
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
|
|
apm_record_event(sc, apm_event);
|
|
apm_resume();
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
|
|
if (apm_record_event(sc, apm_event)) {
|
|
apm_battery_low();
|
|
apm_suspend(PMST_SUSPEND);
|
|
}
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
|
|
apm_record_event(sc, apm_event);
|
|
break;
|
|
OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
|
|
apm_record_event(sc, apm_event);
|
|
inittodr(0); /* adjust time to RTC */
|
|
break;
|
|
case PMEV_NOEVENT:
|
|
break;
|
|
default:
|
|
printf("Unknown Original APM Event 0x%x\n", apm_event);
|
|
break;
|
|
}
|
|
} while (apm_event != PMEV_NOEVENT);
|
|
}
|
|
|
|
/*
|
|
* Attach APM:
|
|
*
|
|
* Initialize APM driver
|
|
*/
|
|
|
|
static int
|
|
apm_attach(device_t dev)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
int flags;
|
|
int drv_version;
|
|
|
|
if (resource_int_value("apm", 0, "flags", &flags) != 0)
|
|
flags = 0;
|
|
|
|
if (flags & 0x20)
|
|
statclock_disable = 1;
|
|
|
|
sc->initialized = 0;
|
|
|
|
/* Must be externally enabled */
|
|
sc->active = 0;
|
|
|
|
/* Always call HLT in idle loop */
|
|
sc->always_halt_cpu = 1;
|
|
|
|
/* print bootstrap messages */
|
|
#ifdef APM_DEBUG
|
|
printf("apm: APM BIOS version %04x\n", apm_version);
|
|
printf("apm: Code16 0x%08x, Data 0x%08x\n",
|
|
sc->bios.seg.code16.base, sc->bios.seg.data.base);
|
|
printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
|
|
sc->bios.entry, is_enabled(sc->slow_idle_cpu),
|
|
is_enabled(!sc->disabled));
|
|
printf("apm: CS_limit=0x%x, DS_limit=0x%x\n",
|
|
sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
|
|
#endif /* APM_DEBUG */
|
|
|
|
#if 0
|
|
/*
|
|
* XXX this may not be needed anymore
|
|
*/
|
|
if ((flags & 0x10)) {
|
|
if ((flags & 0xf) >= 0x2) {
|
|
apm_driver_version(0x102);
|
|
}
|
|
if (!apm_version && (flags & 0xf) >= 0x1) {
|
|
apm_driver_version(0x101);
|
|
}
|
|
} else {
|
|
apm_driver_version(0x102);
|
|
if (!apm_version)
|
|
apm_driver_version(0x101);
|
|
}
|
|
#endif
|
|
/*
|
|
* In one test, apm bios version was 1.02; an attempt to register
|
|
* a 1.04 driver resulted in a 1.00 connection! Registering a
|
|
* 1.02 driver resulted in a 1.02 connection.
|
|
*/
|
|
drv_version = apm_version > 0x102 ? 0x102 : apm_version;
|
|
for (; drv_version > 0x100; drv_version--)
|
|
if (apm_driver_version(drv_version) == 0)
|
|
break;
|
|
sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
|
|
((drv_version & 0x000f) >> 0);
|
|
sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
|
|
((apm_version & 0x0f00) >> 8);
|
|
|
|
sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
|
|
|
|
#ifdef APM_DEBUG
|
|
if (sc->intversion >= INTVERSION(1, 1))
|
|
printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
|
|
#endif
|
|
|
|
printf("apm: found APM BIOS v%ld.%ld, connected at v%d.%d\n",
|
|
((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
|
|
((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
|
|
sc->majorversion, sc->minorversion);
|
|
|
|
#ifdef APM_DEBUG
|
|
printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
|
|
#endif
|
|
|
|
/* enable power management */
|
|
if (sc->disabled) {
|
|
if (apm_enable_disable_pm(1)) {
|
|
#ifdef APM_DEBUG
|
|
printf("apm: *Warning* enable function failed! [%x]\n",
|
|
apm_errno);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* engage power managment (APM 1.1 or later) */
|
|
if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
|
|
if (apm_engage_disengage_pm(1)) {
|
|
#ifdef APM_DEBUG
|
|
printf("apm: *Warning* engage function failed err=[%x]",
|
|
apm_errno);
|
|
printf(" (Docked or using external power?).\n");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* default suspend hook */
|
|
sc->sc_suspend.ah_fun = apm_default_suspend;
|
|
sc->sc_suspend.ah_arg = sc;
|
|
sc->sc_suspend.ah_name = "default suspend";
|
|
sc->sc_suspend.ah_order = APM_MAX_ORDER;
|
|
|
|
/* default resume hook */
|
|
sc->sc_resume.ah_fun = apm_default_resume;
|
|
sc->sc_resume.ah_arg = sc;
|
|
sc->sc_resume.ah_name = "default resume";
|
|
sc->sc_resume.ah_order = APM_MIN_ORDER;
|
|
|
|
apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend);
|
|
apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume);
|
|
|
|
/* Power the system off using APM */
|
|
at_shutdown_pri(apm_power_off, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_LAST);
|
|
|
|
sc->initialized = 1;
|
|
|
|
#ifdef DEVFS
|
|
sc->sc_devfs_token =
|
|
devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
apmopen(dev_t dev, int flag, int fmt, struct proc *p)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
int ctl = APMDEV(dev);
|
|
|
|
if (!sc->initialized)
|
|
return (ENXIO);
|
|
|
|
switch (ctl) {
|
|
case APMDEV_CTL:
|
|
if (!(flag & FWRITE))
|
|
return EINVAL;
|
|
if (sc->sc_flags & SCFLAG_OCTL)
|
|
return EBUSY;
|
|
sc->sc_flags |= SCFLAG_OCTL;
|
|
bzero(sc->event_filter, sizeof sc->event_filter);
|
|
break;
|
|
case APMDEV_NORMAL:
|
|
sc->sc_flags |= SCFLAG_ONORMAL;
|
|
break;
|
|
default:
|
|
return ENXIO;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
apmclose(dev_t dev, int flag, int fmt, struct proc *p)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
int ctl = APMDEV(dev);
|
|
|
|
switch (ctl) {
|
|
case APMDEV_CTL:
|
|
apm_lastreq_rejected();
|
|
sc->sc_flags &= ~SCFLAG_OCTL;
|
|
bzero(sc->event_filter, sizeof sc->event_filter);
|
|
break;
|
|
case APMDEV_NORMAL:
|
|
sc->sc_flags &= ~SCFLAG_ONORMAL;
|
|
break;
|
|
}
|
|
if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
|
|
sc->event_count = 0;
|
|
sc->event_ptr = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
int error = 0;
|
|
int newstate;
|
|
|
|
if (!sc->initialized)
|
|
return (ENXIO);
|
|
#ifdef APM_DEBUG
|
|
printf("APM ioctl: cmd = 0x%x\n", cmd);
|
|
#endif
|
|
switch (cmd) {
|
|
case APMIO_SUSPEND:
|
|
if (sc->active)
|
|
apm_suspend(PMST_SUSPEND);
|
|
else
|
|
error = EINVAL;
|
|
break;
|
|
|
|
case APMIO_STANDBY:
|
|
if (sc->active)
|
|
apm_suspend(PMST_STANDBY);
|
|
else
|
|
error = EINVAL;
|
|
break;
|
|
|
|
case APMIO_GETINFO_OLD:
|
|
{
|
|
struct apm_info info;
|
|
apm_info_old_t aiop;
|
|
|
|
if (apm_get_info(&info))
|
|
error = ENXIO;
|
|
aiop = (apm_info_old_t)addr;
|
|
aiop->ai_major = info.ai_major;
|
|
aiop->ai_minor = info.ai_minor;
|
|
aiop->ai_acline = info.ai_acline;
|
|
aiop->ai_batt_stat = info.ai_batt_stat;
|
|
aiop->ai_batt_life = info.ai_batt_life;
|
|
aiop->ai_status = info.ai_status;
|
|
}
|
|
break;
|
|
case APMIO_GETINFO:
|
|
if (apm_get_info((apm_info_t)addr))
|
|
error = ENXIO;
|
|
break;
|
|
case APMIO_ENABLE:
|
|
apm_event_enable();
|
|
break;
|
|
case APMIO_DISABLE:
|
|
apm_event_disable();
|
|
break;
|
|
case APMIO_HALTCPU:
|
|
apm_halt_cpu();
|
|
break;
|
|
case APMIO_NOTHALTCPU:
|
|
apm_not_halt_cpu();
|
|
break;
|
|
case APMIO_DISPLAY:
|
|
newstate = *(int *)addr;
|
|
if (apm_display(newstate))
|
|
error = ENXIO;
|
|
break;
|
|
#if 0
|
|
case APMIO_BIOS:
|
|
if (apm_bios_call((struct apm_bios_arg*)addr) == 0)
|
|
((struct apm_bios_arg*)addr)->eax &= 0xff;
|
|
break;
|
|
#endif
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
/* for /dev/apmctl */
|
|
if (APMDEV(dev) == APMDEV_CTL) {
|
|
struct apm_event_info *evp;
|
|
int i;
|
|
|
|
error = 0;
|
|
switch (cmd) {
|
|
case APMIO_NEXTEVENT:
|
|
if (!sc->event_count) {
|
|
error = EAGAIN;
|
|
} else {
|
|
evp = (struct apm_event_info *)addr;
|
|
i = sc->event_ptr + APM_NEVENTS - sc->event_count;
|
|
i %= APM_NEVENTS;
|
|
*evp = sc->event_list[i];
|
|
sc->event_count--;
|
|
}
|
|
break;
|
|
case APMIO_REJECTLASTREQ:
|
|
if (apm_lastreq_rejected()) {
|
|
error = EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
apmwrite(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
u_int event_type;
|
|
int error;
|
|
u_char enabled;
|
|
|
|
if (APMDEV(dev) != APMDEV_CTL)
|
|
return(ENODEV);
|
|
if (uio->uio_resid != sizeof(u_int))
|
|
return(E2BIG);
|
|
|
|
if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
|
|
return(error);
|
|
|
|
if (event_type < 0 || event_type >= APM_NPMEV)
|
|
return(EINVAL);
|
|
|
|
if (sc->event_filter[event_type] == 0) {
|
|
enabled = 1;
|
|
} else {
|
|
enabled = 0;
|
|
}
|
|
sc->event_filter[event_type] = enabled;
|
|
#ifdef APM_DEBUG
|
|
printf("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
|
|
#endif
|
|
|
|
return uio->uio_resid;
|
|
}
|
|
|
|
static int
|
|
apmpoll(dev_t dev, int events, struct proc *p)
|
|
{
|
|
struct apm_softc *sc = &apm_softc;
|
|
int revents = 0;
|
|
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
|
if (sc->event_count) {
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
} else {
|
|
selrecord(p, &sc->sc_rsel);
|
|
}
|
|
}
|
|
|
|
return (revents);
|
|
}
|
|
|
|
static device_method_t apm_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, apm_probe),
|
|
DEVMETHOD(device_attach, apm_attach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t apm_driver = {
|
|
"apm",
|
|
apm_methods,
|
|
1, /* no softc (XXX) */
|
|
};
|
|
|
|
static devclass_t apm_devclass;
|
|
|
|
DEV_DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, apm_cdevsw, 0, 0);
|