diff options
author | jhibbits <jhibbits@FreeBSD.org> | 2012-08-04 03:05:01 +0000 |
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committer | jhibbits <jhibbits@FreeBSD.org> | 2012-08-04 03:05:01 +0000 |
commit | dcbbf29bee04d5d6865d3b725fae95fbf4c76a78 (patch) | |
tree | b46940b38b9836a10a342b14b3a3bc5d5a0efd47 /sys/powerpc | |
parent | 1f063923e4a43c0d03e5cb1ecffce526ae846cff (diff) | |
download | FreeBSD-src-dcbbf29bee04d5d6865d3b725fae95fbf4c76a78.zip FreeBSD-src-dcbbf29bee04d5d6865d3b725fae95fbf4c76a78.tar.gz |
Add backlight support for nVidia-based PowerBooks/iBooks/iMacs.
Approved by: nwhitehorn (mentor)
MFC after: 9.1-RELEASE
Diffstat (limited to 'sys/powerpc')
-rw-r--r-- | sys/powerpc/conf/GENERIC | 1 | ||||
-rw-r--r-- | sys/powerpc/conf/GENERIC64 | 1 | ||||
-rw-r--r-- | sys/powerpc/powermac/nvbl.c | 197 |
3 files changed, 199 insertions, 0 deletions
diff --git a/sys/powerpc/conf/GENERIC b/sys/powerpc/conf/GENERIC index 4ca103a..75314d9 100644 --- a/sys/powerpc/conf/GENERIC +++ b/sys/powerpc/conf/GENERIC @@ -197,6 +197,7 @@ device powermac_nvram # Open Firmware configuration NVRAM device smu # Apple System Management Unit device windtunnel # Apple G4 MDD fan controller device atibl # ATI-based backlight driver for PowerBooks/iBooks +device nvbl # nVidia-based backlight driver for PowerBooks/iBooks # ADB support device adb diff --git a/sys/powerpc/conf/GENERIC64 b/sys/powerpc/conf/GENERIC64 index e7577be..088f5ae 100644 --- a/sys/powerpc/conf/GENERIC64 +++ b/sys/powerpc/conf/GENERIC64 @@ -194,6 +194,7 @@ device max6690 # PowerMac7,2 temperature sensor device powermac_nvram # Open Firmware configuration NVRAM device smu # Apple System Management Unit device atibl # ATI-based backlight driver for PowerBooks/iBooks +device nvbl # nVidia-based backlight driver for PowerBooks/iBooks # ADB support device adb diff --git a/sys/powerpc/powermac/nvbl.c b/sys/powerpc/powermac/nvbl.c new file mode 100644 index 0000000..3317075 --- /dev/null +++ b/sys/powerpc/powermac/nvbl.c @@ -0,0 +1,197 @@ +/*- + * Copyright (c) 2012 Justin Hibbits + * 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 ``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 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/kernel.h> +#include <sys/rman.h> +#include <sys/sysctl.h> + +#include <machine/bus.h> + +#include <dev/ofw/openfirm.h> + +#define NVIDIA_BRIGHT_MIN (0x0ec) +#define NVIDIA_BRIGHT_MAX (0x538) +#define NVIDIA_BRIGHT_SCALE ((NVIDIA_BRIGHT_MAX - NVIDIA_BRIGHT_MIN)/100) +/* nVidia's MMIO registers are at PCI BAR[0] */ +#define NVIDIA_MMIO_PMC (0x0) +#define NVIDIA_PMC_OFF (NVIDIA_MMIO_PMC + 0x10f0) +#define NVIDIA_PMC_BL_SHIFT (16) +#define NVIDIA_PMC_BL_EN (1 << 31) + + +struct nvbl_softc { + device_t dev; + struct resource *sc_memr; +}; + +static void nvbl_identify(driver_t *driver, device_t parent); +static int nvbl_probe(device_t dev); +static int nvbl_attach(device_t dev); +static int nvbl_setlevel(struct nvbl_softc *sc, int newlevel); +static int nvbl_getlevel(struct nvbl_softc *sc); +static int nvbl_sysctl(SYSCTL_HANDLER_ARGS); + +static device_method_t nvbl_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, nvbl_identify), + DEVMETHOD(device_probe, nvbl_probe), + DEVMETHOD(device_attach, nvbl_attach), + {0, 0}, +}; + +static driver_t nvbl_driver = { + "backlight", + nvbl_methods, + sizeof(struct nvbl_softc) +}; + +static devclass_t nvbl_devclass; + +DRIVER_MODULE(nvbl, vgapci, nvbl_driver, nvbl_devclass, 0, 0); + +static void +nvbl_identify(driver_t *driver, device_t parent) +{ + if (device_find_child(parent, "backlight", -1) == NULL) + device_add_child(parent, "backlight", -1); +} + +static int +nvbl_probe(device_t dev) +{ + char control[8]; + phandle_t handle; + + handle = OF_finddevice("mac-io/backlight"); + + if (handle <= 0) + return (ENXIO); + + if (OF_getprop(handle, "backlight-control", &control, sizeof(control)) < 0) + return (ENXIO); + + if (strcmp(control, "mnca") != 0) + return (ENXIO); + + device_set_desc(dev, "PowerBook backlight for nVidia graphics"); + + return (0); +} + +static int +nvbl_attach(device_t dev) +{ + struct nvbl_softc *sc; + struct sysctl_ctx_list *ctx; + struct sysctl_oid *tree; + int rid; + + sc = device_get_softc(dev); + + rid = 0x10; /* BAR[0], for the MMIO register */ + sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE | RF_SHAREABLE); + if (sc->sc_memr == NULL) { + device_printf(dev, "Could not alloc mem resource!\n"); + return (ENXIO); + } + + /* Turn on big-endian mode */ + if (!(bus_read_stream_4(sc->sc_memr, NVIDIA_MMIO_PMC + 4) & 0x01000001)) { + bus_write_stream_4(sc->sc_memr, NVIDIA_MMIO_PMC + 4, 0x01000001); + mb(); + } + + ctx = device_get_sysctl_ctx(dev); + tree = device_get_sysctl_tree(dev); + + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "level", CTLTYPE_INT | CTLFLAG_RW, sc, 0, + nvbl_sysctl, "I", "Backlight level (0-100)"); + + return (0); +} + +static int +nvbl_setlevel(struct nvbl_softc *sc, int newlevel) +{ + uint32_t pmc_reg; + + if (newlevel > 100) + newlevel = 100; + + if (newlevel < 0) + newlevel = 0; + + if (newlevel > 0) + newlevel = (newlevel * NVIDIA_BRIGHT_SCALE) + NVIDIA_BRIGHT_MIN; + + pmc_reg = bus_read_stream_4(sc->sc_memr, NVIDIA_PMC_OFF) & 0xffff; + pmc_reg |= NVIDIA_PMC_BL_EN | (newlevel << NVIDIA_PMC_BL_SHIFT); + bus_write_stream_4(sc->sc_memr, NVIDIA_PMC_OFF, pmc_reg); + + return (0); +} + +static int +nvbl_getlevel(struct nvbl_softc *sc) +{ + uint16_t level; + + level = bus_read_stream_2(sc->sc_memr, NVIDIA_PMC_OFF) & 0x7fff; + + if (level < NVIDIA_BRIGHT_MIN) + return 0; + + level = (level - NVIDIA_BRIGHT_MIN) / NVIDIA_BRIGHT_SCALE; + + return (level); +} + +static int +nvbl_sysctl(SYSCTL_HANDLER_ARGS) +{ + struct nvbl_softc *sc; + int newlevel, error; + + sc = arg1; + + newlevel = nvbl_getlevel(sc); + + error = sysctl_handle_int(oidp, &newlevel, 0, req); + + if (error || !req->newptr) + return (error); + + return (nvbl_setlevel(sc, newlevel)); +} |