71e3c3083b
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. 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.
206 lines
5.2 KiB
C
206 lines
5.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 Justin Hibbits
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#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/systm.h>
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#include <sys/module.h>
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#include <sys/kernel.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <machine/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/pci/pcivar.h>
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#define PCI_VENDOR_ID_NVIDIA 0x10de
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#define NVIDIA_BRIGHT_MIN (0x0ec)
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#define NVIDIA_BRIGHT_MAX (0x538)
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#define NVIDIA_BRIGHT_SCALE ((NVIDIA_BRIGHT_MAX - NVIDIA_BRIGHT_MIN)/100)
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/* nVidia's MMIO registers are at PCI BAR[0] */
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#define NVIDIA_MMIO_PMC (0x0)
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#define NVIDIA_PMC_OFF (NVIDIA_MMIO_PMC + 0x10f0)
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#define NVIDIA_PMC_BL_SHIFT (16)
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#define NVIDIA_PMC_BL_EN (1U << 31)
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struct nvbl_softc {
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device_t dev;
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struct resource *sc_memr;
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};
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static void nvbl_identify(driver_t *driver, device_t parent);
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static int nvbl_probe(device_t dev);
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static int nvbl_attach(device_t dev);
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static int nvbl_setlevel(struct nvbl_softc *sc, int newlevel);
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static int nvbl_getlevel(struct nvbl_softc *sc);
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static int nvbl_sysctl(SYSCTL_HANDLER_ARGS);
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static device_method_t nvbl_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, nvbl_identify),
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DEVMETHOD(device_probe, nvbl_probe),
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DEVMETHOD(device_attach, nvbl_attach),
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{0, 0},
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};
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static driver_t nvbl_driver = {
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"backlight",
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nvbl_methods,
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sizeof(struct nvbl_softc)
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};
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static devclass_t nvbl_devclass;
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DRIVER_MODULE(nvbl, vgapci, nvbl_driver, nvbl_devclass, 0, 0);
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static void
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nvbl_identify(driver_t *driver, device_t parent)
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{
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if (OF_finddevice("mac-io/backlight") == -1)
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return;
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if (device_find_child(parent, "backlight", -1) == NULL)
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device_add_child(parent, "backlight", -1);
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}
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static int
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nvbl_probe(device_t dev)
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{
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char control[8];
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phandle_t handle;
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handle = OF_finddevice("mac-io/backlight");
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if (handle == -1)
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return (ENXIO);
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if (OF_getprop(handle, "backlight-control", &control, sizeof(control)) < 0)
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return (ENXIO);
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if ((strcmp(control, "mnca") != 0) ||
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pci_get_vendor(device_get_parent(dev)) != PCI_VENDOR_ID_NVIDIA)
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return (ENXIO);
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device_set_desc(dev, "PowerBook backlight for nVidia graphics");
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return (0);
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}
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static int
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nvbl_attach(device_t dev)
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{
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struct nvbl_softc *sc;
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struct sysctl_ctx_list *ctx;
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struct sysctl_oid *tree;
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int rid;
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sc = device_get_softc(dev);
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rid = 0x10; /* BAR[0], for the MMIO register */
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sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->sc_memr == NULL) {
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device_printf(dev, "Could not alloc mem resource!\n");
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return (ENXIO);
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}
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/* Turn on big-endian mode */
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if (!(bus_read_stream_4(sc->sc_memr, NVIDIA_MMIO_PMC + 4) & 0x01000001)) {
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bus_write_stream_4(sc->sc_memr, NVIDIA_MMIO_PMC + 4, 0x01000001);
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mb();
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}
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ctx = device_get_sysctl_ctx(dev);
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tree = device_get_sysctl_tree(dev);
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
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"level", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
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nvbl_sysctl, "I", "Backlight level (0-100)");
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return (0);
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}
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static int
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nvbl_setlevel(struct nvbl_softc *sc, int newlevel)
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{
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uint32_t pmc_reg;
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if (newlevel > 100)
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newlevel = 100;
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if (newlevel < 0)
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newlevel = 0;
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if (newlevel > 0)
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newlevel = (newlevel * NVIDIA_BRIGHT_SCALE) + NVIDIA_BRIGHT_MIN;
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pmc_reg = bus_read_stream_4(sc->sc_memr, NVIDIA_PMC_OFF) & 0xffff;
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pmc_reg |= NVIDIA_PMC_BL_EN | (newlevel << NVIDIA_PMC_BL_SHIFT);
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bus_write_stream_4(sc->sc_memr, NVIDIA_PMC_OFF, pmc_reg);
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return (0);
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}
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static int
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nvbl_getlevel(struct nvbl_softc *sc)
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{
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uint16_t level;
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level = bus_read_stream_2(sc->sc_memr, NVIDIA_PMC_OFF) & 0x7fff;
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if (level < NVIDIA_BRIGHT_MIN)
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return 0;
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level = (level - NVIDIA_BRIGHT_MIN) / NVIDIA_BRIGHT_SCALE;
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return (level);
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}
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static int
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nvbl_sysctl(SYSCTL_HANDLER_ARGS)
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{
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struct nvbl_softc *sc;
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int newlevel, error;
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sc = arg1;
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newlevel = nvbl_getlevel(sc);
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error = sysctl_handle_int(oidp, &newlevel, 0, req);
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if (error || !req->newptr)
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return (error);
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return (nvbl_setlevel(sc, newlevel));
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}
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