/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/bsd/bsd_apm.c,v 1.1 2000/02/29 03:09:25 dawes Exp $ */

#include "X.h"
#include "os.h"
#include "xf86.h"
#include "xf86Priv.h"
#define XF86_OS_PRIVS
#include "xf86_OSproc.h"
#include "xf86_OSlib.h"

#include <machine/apmvar.h>

#define APM_DEVICE "/dev/apm"

static pointer APMihPtr = NULL;
static void bsdCloseAPM(void);

static struct {
    u_int apmBsd;
    pmEvent xf86;
} bsdToXF86Array [] = {
    { APM_STANDBY_REQ, XF86_APM_SYS_STANDBY },
    { APM_SUSPEND_REQ, XF86_APM_SYS_SUSPEND },
    { APM_NORMAL_RESUME, XF86_APM_NORMAL_RESUME },
    { APM_CRIT_RESUME, XF86_APM_CRITICAL_RESUME },
    { APM_BATTERY_LOW, XF86_APM_LOW_BATTERY },
    { APM_POWER_CHANGE, XF86_APM_POWER_STATUS_CHANGE },
    { APM_UPDATE_TIME, XF86_APM_UPDATE_TIME },
    { APM_CRIT_SUSPEND_REQ, XF86_APM_CRITICAL_SUSPEND },
    { APM_USER_STANDBY_REQ, XF86_APM_USER_STANDBY },
    { APM_USER_SUSPEND_REQ, XF86_APM_USER_SUSPEND },
    { APM_SYS_STANDBY_RESUME, XF86_APM_STANDBY_RESUME },
#ifdef APM_CAPABILITY_CHANGE
    { APM_CAPABILITY_CHANGE, XF86_APM_CAPABILITY_CHANGED },
#endif
};

#define numApmEvents (sizeof(bsdToXF86Array) / sizeof(bsdToXF86Array[0]))

static pmEvent
bsdToXF86(int type)
{
    int i;

    for (i = 0; i < numApmEvents; i++) {
	if (type == bsdToXF86Array[i].apmBsd) {
	    return bsdToXF86Array[i].xf86;
	}
    }
    return XF86_APM_UNKNOWN;
}

/*
 * APM events can be requested direclty from /dev/apm 
 */
static int 
bsdPMGetEventFromOS(int fd, pmEvent *events, int num)
{
    struct apm_event_info bsdEvent;
    int i;

    for (i = 0; i < num; i++) {
	
	if (ioctl(fd, APM_IOC_NEXTEVENT, &bsdEvent) < 0) {
	    if (errno != EAGAIN) {
		xf86Msg(X_WARNING, "bsdPMGetEventFromOS: APM_IOC_NEXTEVENT"
			" errno = %d\n", errno);
	    }
	    break;
	}
	events[i] = bsdToXF86(bsdEvent.type);
    }
    return i;
}

/*
 * XXX This won't work on /dev/apm !
 *     We should either use /dev/apm_ctl (and kill apmd(8))
 *     or talk to apmd (but its protocol is not publically available)...
 */
static pmWait
bsdPMConfirmEventToOs(int fd, pmEvent event)
{
    switch (event) {
      case XF86_APM_SYS_STANDBY:
      case XF86_APM_USER_STANDBY:
        if (ioctl( fd, APM_IOC_STANDBY, NULL ) == 0)
            return PM_WAIT;  /* should we stop the Xserver in standby, too? */
        else
            return PM_NONE;
      case XF86_APM_SYS_SUSPEND:
      case XF86_APM_CRITICAL_SUSPEND:
      case XF86_APM_USER_SUSPEND:
        if (ioctl( fd, APM_IOC_SUSPEND, NULL ) == 0)
            return PM_WAIT;
        else
            return PM_NONE;
      case XF86_APM_STANDBY_RESUME:
      case XF86_APM_NORMAL_RESUME:
      case XF86_APM_CRITICAL_RESUME:
      case XF86_APM_STANDBY_FAILED:
      case XF86_APM_SUSPEND_FAILED:
        return PM_CONTINUE;
      default:
	return PM_NONE;
    }
}

PMClose
xf86OSPMOpen(void)
{
    int fd;

    if (APMihPtr || !xf86Info.pmFlag) {
	return NULL;
    }

    if ((fd = open(APM_DEVICE, O_RDWR)) == -1) {
	return NULL;
    }
    xf86PMGetEventFromOs = bsdPMGetEventFromOS;
    xf86PMConfirmEventToOs = bsdPMConfirmEventToOs;
    APMihPtr = xf86AddInputHandler(fd, xf86HandlePMEvents, NULL);
    return bsdCloseAPM;
}

static void
bsdCloseAPM(void)
{
    int fd;

    if (APMihPtr) {
	fd = xf86RemoveInputHandler(APMihPtr);
	close(fd);
	APMihPtr = NULL;
    }
}
