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Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
233 lines
6.2 KiB
C
233 lines
6.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2008 Yahoo!, Inc.
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* All rights reserved.
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* Written by: John Baldwin <jhb@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 2004 Benjamin Close <Benjamin.Close@clearchain.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Support for managing the display via DPMS for suspend/resume.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/libkern.h>
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#include <sys/module.h>
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#include <compat/x86bios/x86bios.h>
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/*
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* VESA DPMS States
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*/
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#define DPMS_ON 0x00
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#define DPMS_STANDBY 0x01
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#define DPMS_SUSPEND 0x02
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#define DPMS_OFF 0x04
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#define DPMS_REDUCEDON 0x08
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#define VBE_DPMS_FUNCTION 0x4F10
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#define VBE_DPMS_GET_SUPPORTED_STATES 0x00
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#define VBE_DPMS_GET_STATE 0x02
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#define VBE_DPMS_SET_STATE 0x01
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#define VBE_MAJORVERSION_MASK 0x0F
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#define VBE_MINORVERSION_MASK 0xF0
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struct dpms_softc {
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int dpms_supported_states;
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int dpms_initial_state;
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};
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static int dpms_attach(device_t);
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static int dpms_detach(device_t);
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static int dpms_get_supported_states(int *);
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static int dpms_get_current_state(int *);
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static void dpms_identify(driver_t *, device_t);
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static int dpms_probe(device_t);
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static int dpms_resume(device_t);
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static int dpms_set_state(int);
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static int dpms_suspend(device_t);
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static device_method_t dpms_methods[] = {
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DEVMETHOD(device_identify, dpms_identify),
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DEVMETHOD(device_probe, dpms_probe),
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DEVMETHOD(device_attach, dpms_attach),
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DEVMETHOD(device_detach, dpms_detach),
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DEVMETHOD(device_suspend, dpms_suspend),
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DEVMETHOD(device_resume, dpms_resume),
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{ 0, 0 }
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};
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static driver_t dpms_driver = {
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"dpms",
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dpms_methods,
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sizeof(struct dpms_softc),
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};
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static devclass_t dpms_devclass;
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DRIVER_MODULE(dpms, vgapm, dpms_driver, dpms_devclass, NULL, NULL);
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MODULE_DEPEND(dpms, x86bios, 1, 1, 1);
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static void
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dpms_identify(driver_t *driver, device_t parent)
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{
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if (x86bios_match_device(0xc0000, device_get_parent(parent)))
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device_add_child(parent, "dpms", 0);
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}
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static int
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dpms_probe(device_t dev)
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{
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int error, states;
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error = dpms_get_supported_states(&states);
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if (error)
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return (error);
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device_set_desc(dev, "DPMS suspend/resume");
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device_quiet(dev);
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return (BUS_PROBE_DEFAULT);
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}
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static int
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dpms_attach(device_t dev)
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{
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struct dpms_softc *sc;
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int error;
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sc = device_get_softc(dev);
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error = dpms_get_supported_states(&sc->dpms_supported_states);
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if (error)
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return (error);
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error = dpms_get_current_state(&sc->dpms_initial_state);
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return (error);
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}
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static int
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dpms_detach(device_t dev)
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{
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return (0);
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}
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static int
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dpms_suspend(device_t dev)
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{
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struct dpms_softc *sc;
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sc = device_get_softc(dev);
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if ((sc->dpms_supported_states & DPMS_OFF) != 0)
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dpms_set_state(DPMS_OFF);
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return (0);
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}
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static int
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dpms_resume(device_t dev)
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{
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struct dpms_softc *sc;
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sc = device_get_softc(dev);
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dpms_set_state(sc->dpms_initial_state);
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return (0);
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}
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static int
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dpms_call_bios(int subfunction, int *bh)
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{
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x86regs_t regs;
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if (x86bios_get_intr(0x10) == 0)
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return (ENXIO);
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x86bios_init_regs(®s);
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regs.R_AX = VBE_DPMS_FUNCTION;
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regs.R_BL = subfunction;
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regs.R_BH = *bh;
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x86bios_intr(®s, 0x10);
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if (regs.R_AX != 0x004f)
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return (ENXIO);
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*bh = regs.R_BH;
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return (0);
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}
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static int
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dpms_get_supported_states(int *states)
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{
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*states = 0;
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return (dpms_call_bios(VBE_DPMS_GET_SUPPORTED_STATES, states));
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}
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static int
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dpms_get_current_state(int *state)
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{
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*state = 0;
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return (dpms_call_bios(VBE_DPMS_GET_STATE, state));
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}
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static int
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dpms_set_state(int state)
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{
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return (dpms_call_bios(VBE_DPMS_SET_STATE, &state));
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}
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