231 lines
6.2 KiB
C
231 lines
6.2 KiB
C
/*-
|
|
* Copyright (c) 2008 Yahoo!, Inc.
|
|
* All rights reserved.
|
|
* Written by: John Baldwin <jhb@FreeBSD.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2004 Benjamin Close <Benjamin.Close@clearchain.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Support for managing the display via DPMS for suspend/resume.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/libkern.h>
|
|
#include <sys/module.h>
|
|
|
|
#include <compat/x86bios/x86bios.h>
|
|
|
|
/*
|
|
* VESA DPMS States
|
|
*/
|
|
#define DPMS_ON 0x00
|
|
#define DPMS_STANDBY 0x01
|
|
#define DPMS_SUSPEND 0x02
|
|
#define DPMS_OFF 0x04
|
|
#define DPMS_REDUCEDON 0x08
|
|
|
|
#define VBE_DPMS_FUNCTION 0x4F10
|
|
#define VBE_DPMS_GET_SUPPORTED_STATES 0x00
|
|
#define VBE_DPMS_GET_STATE 0x02
|
|
#define VBE_DPMS_SET_STATE 0x01
|
|
#define VBE_MAJORVERSION_MASK 0x0F
|
|
#define VBE_MINORVERSION_MASK 0xF0
|
|
|
|
struct dpms_softc {
|
|
int dpms_supported_states;
|
|
int dpms_initial_state;
|
|
};
|
|
|
|
static int dpms_attach(device_t);
|
|
static int dpms_detach(device_t);
|
|
static int dpms_get_supported_states(int *);
|
|
static int dpms_get_current_state(int *);
|
|
static void dpms_identify(driver_t *, device_t);
|
|
static int dpms_probe(device_t);
|
|
static int dpms_resume(device_t);
|
|
static int dpms_set_state(int);
|
|
static int dpms_suspend(device_t);
|
|
|
|
static device_method_t dpms_methods[] = {
|
|
DEVMETHOD(device_identify, dpms_identify),
|
|
DEVMETHOD(device_probe, dpms_probe),
|
|
DEVMETHOD(device_attach, dpms_attach),
|
|
DEVMETHOD(device_detach, dpms_detach),
|
|
DEVMETHOD(device_suspend, dpms_suspend),
|
|
DEVMETHOD(device_resume, dpms_resume),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t dpms_driver = {
|
|
"dpms",
|
|
dpms_methods,
|
|
sizeof(struct dpms_softc),
|
|
};
|
|
|
|
static devclass_t dpms_devclass;
|
|
|
|
DRIVER_MODULE(dpms, vgapm, dpms_driver, dpms_devclass, NULL, NULL);
|
|
MODULE_DEPEND(dpms, x86bios, 1, 1, 1);
|
|
|
|
static void
|
|
dpms_identify(driver_t *driver, device_t parent)
|
|
{
|
|
|
|
if (x86bios_match_device(0xc0000, device_get_parent(parent)))
|
|
device_add_child(parent, "dpms", 0);
|
|
}
|
|
|
|
static int
|
|
dpms_probe(device_t dev)
|
|
{
|
|
int error, states;
|
|
|
|
error = dpms_get_supported_states(&states);
|
|
if (error)
|
|
return (error);
|
|
device_set_desc(dev, "DPMS suspend/resume");
|
|
device_quiet(dev);
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
static int
|
|
dpms_attach(device_t dev)
|
|
{
|
|
struct dpms_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
error = dpms_get_supported_states(&sc->dpms_supported_states);
|
|
if (error)
|
|
return (error);
|
|
error = dpms_get_current_state(&sc->dpms_initial_state);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
dpms_detach(device_t dev)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
dpms_suspend(device_t dev)
|
|
{
|
|
struct dpms_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
if ((sc->dpms_supported_states & DPMS_OFF) != 0)
|
|
dpms_set_state(DPMS_OFF);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
dpms_resume(device_t dev)
|
|
{
|
|
struct dpms_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
dpms_set_state(sc->dpms_initial_state);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
dpms_call_bios(int subfunction, int *bh)
|
|
{
|
|
x86regs_t regs;
|
|
|
|
if (x86bios_get_intr(0x10) == 0)
|
|
return (ENXIO);
|
|
|
|
x86bios_init_regs(®s);
|
|
regs.R_AX = VBE_DPMS_FUNCTION;
|
|
regs.R_BL = subfunction;
|
|
regs.R_BH = *bh;
|
|
x86bios_intr(®s, 0x10);
|
|
|
|
if (regs.R_AX != 0x004f)
|
|
return (ENXIO);
|
|
|
|
*bh = regs.R_BH;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
dpms_get_supported_states(int *states)
|
|
{
|
|
|
|
*states = 0;
|
|
return (dpms_call_bios(VBE_DPMS_GET_SUPPORTED_STATES, states));
|
|
}
|
|
|
|
static int
|
|
dpms_get_current_state(int *state)
|
|
{
|
|
|
|
*state = 0;
|
|
return (dpms_call_bios(VBE_DPMS_GET_STATE, state));
|
|
}
|
|
|
|
static int
|
|
dpms_set_state(int state)
|
|
{
|
|
|
|
return (dpms_call_bios(VBE_DPMS_SET_STATE, &state));
|
|
}
|