Add support for special keys (volume/brightness/eject) on Apple laptops with

ADB keyboards.

Submitted by:	Justin Hibbits <jrh29 at alumni dot cwru dot edu>
MFC after:	9.0-RELEASE

1 files changed, 165 insertions, 0 deletions

diff --git a/sys/dev/adb/adb_buttons.c b/sys/dev/adb/adb_buttons.c
new file mode 100644
index 0000000..92cdda1
--- /dev/null
+++ b/sys/dev/adb/adb_buttons.c
@@ -0,0 +1,165 @@
+/*-
+ * Copyright (c) 2011, Justin Hibbits.
+ * Copyright (c) 2002, Miodrag Vallat.
+ * Copyright (C) 1999 Tsubai Masanari.  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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 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.
+ *
+ * OpenBSD: abtn.c,v 1.12 2009/01/10 18:00:59 robert Exp
+ * NetBSD: abtn.c,v 1.1 1999/07/12 17:48:26 tsubai Exp
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/module.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+
+#include <dev/ofw/openfirm.h>
+#include <machine/ofw_machdep.h>
+
+#include <dev/adb/adb.h>
+
+#define ABTN_HANDLER_ID 31
+
+struct abtn_softc {
+	device_t sc_dev;
+
+	int handler_id;
+};
+
+static int abtn_probe(device_t dev);
+static int abtn_attach(device_t dev);
+static u_int abtn_receive_packet(device_t dev, u_char status, 
+    u_char command, u_char reg, int len, u_char *data);
+
+static device_method_t abtn_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,         abtn_probe),
+        DEVMETHOD(device_attach,        abtn_attach),
+        DEVMETHOD(device_shutdown,      bus_generic_shutdown),
+        DEVMETHOD(device_suspend,       bus_generic_suspend),
+        DEVMETHOD(device_resume,        bus_generic_resume),
+
+	/* ADB interface */
+	DEVMETHOD(adb_receive_packet,	abtn_receive_packet),
+
+	{ 0, 0 }
+};
+
+static driver_t abtn_driver = {
+	"abtn",
+	abtn_methods,
+	sizeof(struct abtn_softc),
+};
+
+static devclass_t abtn_devclass;
+
+DRIVER_MODULE(abtn, adb, abtn_driver, abtn_devclass, 0, 0);
+
+static int
+abtn_probe(device_t dev)
+{
+	uint8_t type;
+
+	type = adb_get_device_type(dev);
+
+	if (type != ADB_DEVICE_MISC)
+		return (ENXIO);
+
+	device_set_desc(dev, "ADB Brightness/Volume/Eject Buttons");
+	return (0);
+}
+
+static int
+abtn_attach(device_t dev) 
+{
+	struct abtn_softc *sc;
+
+	sc = device_get_softc(dev);
+	sc->sc_dev = dev;
+
+	sc->handler_id = adb_get_device_handler(dev);
+
+	return 0;
+}
+
+static u_int
+abtn_receive_packet(device_t dev, u_char status, 
+    u_char command, u_char reg, int len, u_char *data)
+{
+	u_int cmd;
+
+	cmd = data[0];
+
+	switch (cmd) {
+	case 0x0a:	/* decrease brightness */
+		if (devctl_process_running())
+			devctl_notify("PMU", "keys", "brightness",
+			    "notify=down");
+		break;
+
+	case 0x09:	/* increase brightness */
+		if (devctl_process_running())
+			devctl_notify("PMU", "keys", "brightness", "notify=up");
+		break;
+
+	case 0x08:	/* mute */
+	case 0x01:	/* mute, AV hardware */
+		if (devctl_process_running())
+			devctl_notify("PMU", "keys", "mute", NULL);
+		break;
+	case 0x07:	/* decrease volume */
+	case 0x02:	/* decrease volume, AV hardware */
+		if (devctl_process_running())
+			devctl_notify("PMU", "keys", "volume", "notify=down");
+		break;
+	case 0x06:	/* increase volume */
+	case 0x03:	/* increase volume, AV hardware */
+		if (devctl_process_running())
+			devctl_notify("PMU", "keys", "volume", "notify=up");
+		break;
+	case 0x0c:	/* mirror display key */
+		/* Need callback to do something with this */
+		break;
+	case 0x0b:	/* eject tray */
+		if (devctl_process_running())
+			devctl_notify("PMU", "keys", "eject", NULL);
+	case 0x7f:	/* numlock */
+		/* Need callback to do something with this */
+		break;
+
+	default:
+#ifdef DEBUG
+		if ((cmd & ~0x7f) == 0)
+			device_printf(dev, "unknown ADB button 0x%x\n", cmd);
+#endif
+		break;
+	}
+	return 0;
+}
+