Author: jhibbits
Date: Sun Feb 26 13:45:25 2012
New Revision: 232177
URL: http://svn.freebsd.org/changeset/base/232177
Log:
Add backlight control to ATI-graphics PowerBooks and iBooks.
Approved by: nwhitehorn (mentor)
MFC after: 1 week
Added:
head/sys/powerpc/powermac/atibl.c (contents, props changed)
Modified:
head/etc/devd/apple.conf
head/sys/conf/files.powerpc
head/sys/powerpc/conf/GENERIC
head/sys/powerpc/conf/GENERIC64
Modified: head/etc/devd/apple.conf
==============================================================================
--- head/etc/devd/apple.conf Sun Feb 26 13:27:22 2012 (r232176)
+++ head/etc/devd/apple.conf Sun Feb 26 13:45:25 2012 (r232177)
@@ -19,6 +19,26 @@ notify 0 {
};
+# The next blocks enable brightness hotkeys that can be found on Apple laptops
+notify 0 {
+ match "system" "PMU";
+ match "subsystem" "keys";
+ match "type" "brightness";
+ match "notify" "down";
+ action "sysctl dev.backlight.0.level=\
+ $(expr `sysctl -n dev.backlight.0.level` - 10)";
+};
+
+notify 0 {
+ match "system" "PMU";
+ match "subsystem" "keys";
+ match "type" "brightness";
+ match "notify" "up";
+ action "sysctl dev.backlight.0.level=\
+ $(expr `sysctl -n dev.backlight.0.level` + 10)";
+};
+
+
# The next blocks enable volume hotkeys that can be found on Apple laptops
notify 0 {
match "system" "PMU";
Modified: head/sys/conf/files.powerpc
==============================================================================
--- head/sys/conf/files.powerpc Sun Feb 26 13:27:22 2012 (r232176)
+++ head/sys/conf/files.powerpc Sun Feb 26 13:45:25 2012 (r232177)
@@ -145,6 +145,7 @@ powerpc/ofw/rtas.c optional aim
powerpc/powermac/ata_kauai.c optional powermac ata | powermac atamacio
powerpc/powermac/ata_macio.c optional powermac ata | powermac atamacio
powerpc/powermac/ata_dbdma.c optional powermac ata | powermac atamacio
+powerpc/powermac/atibl.c optional powermac atibl
powerpc/powermac/cuda.c optional powermac cuda
powerpc/powermac/cpcht.c optional powermac pci
powerpc/powermac/dbdma.c optional powermac pci
Modified: head/sys/powerpc/conf/GENERIC
==============================================================================
--- head/sys/powerpc/conf/GENERIC Sun Feb 26 13:27:22 2012
(r232176)
+++ head/sys/powerpc/conf/GENERIC Sun Feb 26 13:45:25 2012
(r232177)
@@ -194,6 +194,7 @@ device max6690 # PowerMac7,2 temperatu
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
# ADB support
device adb
Modified: head/sys/powerpc/conf/GENERIC64
==============================================================================
--- head/sys/powerpc/conf/GENERIC64 Sun Feb 26 13:27:22 2012
(r232176)
+++ head/sys/powerpc/conf/GENERIC64 Sun Feb 26 13:45:25 2012
(r232177)
@@ -188,6 +188,7 @@ device fcu # Apple Fan Control Unit
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
# ADB support
device adb
Added: head/sys/powerpc/powermac/atibl.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/powerpc/powermac/atibl.c Sun Feb 26 13:45:25 2012
(r232177)
@@ -0,0 +1,196 @@
+/*-
+ * 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>
+
+/* From the xf86-video-ati driver's radeon_reg.h */
+#define RADEON_LVDS_GEN_CNTL 0x02d0
+#define RADEON_LVDS_ON (1 << 0)
+#define RADEON_LVDS_DISPLAY_DIS (1 << 1)
+#define RADEON_LVDS_PANEL_TYPE (1 << 2)
+#define RADEON_LVDS_PANEL_FORMAT (1 << 3)
+#define RADEON_LVDS_RST_FM (1 << 6)
+#define RADEON_LVDS_EN (1 << 7)
+#define RADEON_LVDS_BL_MOD_LEVEL_SHIFT 8
+#define RADEON_LVDS_BL_MOD_LEVEL_MASK (0xff << 8)
+#define RADEON_LVDS_BL_MOD_EN (1 << 16)
+#define RADEON_LVDS_DIGON (1 << 18)
+#define RADEON_LVDS_BLON (1 << 19)
+
+struct atibl_softc {
+ device_t dev;
+ struct resource *sc_memr;
+};
+
+static void atibl_identify(driver_t *driver, device_t parent);
+static int atibl_probe(device_t dev);
+static int atibl_attach(device_t dev);
+static int atibl_setlevel(struct atibl_softc *sc, int newlevel);
+static int atibl_getlevel(struct atibl_softc *sc);
+static int atibl_sysctl(SYSCTL_HANDLER_ARGS);
+
+static device_method_t atibl_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_identify, atibl_identify),
+ DEVMETHOD(device_probe, atibl_probe),
+ DEVMETHOD(device_attach, atibl_attach),
+ {0, 0},
+};
+
+static driver_t atibl_driver = {
+ "backlight",
+ atibl_methods,
+ sizeof(struct atibl_softc)
+};
+
+static devclass_t atibl_devclass;
+
+DRIVER_MODULE(atibl, vgapci, atibl_driver, atibl_devclass, 0, 0);
+
+static void
+atibl_identify(driver_t *driver, device_t parent)
+{
+ if (device_find_child(parent, "backlight", -1) == NULL)
+ device_add_child(parent, "backlight", -1);
+}
+
+static int
+atibl_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, "ati") != 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "PowerBook backlight");
+
+ return (0);
+}
+
+static int
+atibl_attach(device_t dev)
+{
+ struct atibl_softc *sc;
+ struct sysctl_ctx_list *ctx;
+ struct sysctl_oid *tree;
+ int rid;
+
+ sc = device_get_softc(dev);
+
+ rid = 0x18; /* BAR[2], 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);
+ }
+
+ 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,
+ atibl_sysctl, "I", "Backlight level (0-100)");
+
+ return (0);
+}
+
+static int
+atibl_setlevel(struct atibl_softc *sc, int newlevel)
+{
+ uint32_t lvds_gen_cntl;
+
+ if (newlevel > 100)
+ newlevel = 100;
+
+ if (newlevel < 0)
+ newlevel = 0;
+
+ newlevel = (newlevel * 5) / 2 + 5;
+ lvds_gen_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL);
+ lvds_gen_cntl |= RADEON_LVDS_BL_MOD_EN;
+ lvds_gen_cntl &= ~RADEON_LVDS_BL_MOD_LEVEL_MASK;
+ lvds_gen_cntl |= (newlevel << RADEON_LVDS_BL_MOD_LEVEL_SHIFT) &
+ RADEON_LVDS_BL_MOD_LEVEL_MASK;
+ bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
+
+ return (0);
+}
+
+static int
+atibl_getlevel(struct atibl_softc *sc)
+{
+ uint32_t lvds_gen_cntl;
+ int level;
+
+ lvds_gen_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL);
+
+ level = ((lvds_gen_cntl & RADEON_LVDS_BL_MOD_LEVEL_MASK) >>
+ RADEON_LVDS_BL_MOD_LEVEL_SHIFT);
+ level = ((level - 5) * 2) / 5;
+
+ return (level);
+}
+
+static int
+atibl_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct atibl_softc *sc;
+ int newlevel, error;
+
+ sc = arg1;
+
+ newlevel = atibl_getlevel(sc);
+
+ error = sysctl_handle_int(oidp, &newlevel, 0, req);
+
+ if (error || !req->newptr)
+ return (error);
+
+ return (atibl_setlevel(sc, newlevel));
+}
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