Add ADB "button" driver. used for brightness/volume control on some systems.

From Nbsd.

1 files changed, 128 insertions, 0 deletions

diff --git a/sys/arch/powerpc/mac/abtn.c b/sys/arch/powerpc/mac/abtn.c
new file mode 100644
index 00000000000..8a9d2a2dbf9
--- /dev/null
+++ b/sys/arch/powerpc/mac/abtn.c
@@ -0,0 +1,128 @@
+/*	$NetBSD: abtn.c,v 1.1 1999/07/12 17:48:26 tsubai Exp $	*/
+
+/*-
+ * 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.
+ */
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+
+#include <powerpc/mac/adbvar.h>
+
+#define NVRAM_BRIGHTNESS 0x140e
+#define ABTN_HANDLER_ID 31
+
+struct abtn_softc {
+	struct device sc_dev;
+
+	int origaddr;		/* ADB device type */
+	int adbaddr;		/* current ADB address */
+	int handler_id;
+
+	int brightness;		/* backlight brightness */
+	int volume;		/* speaker volume (not yet) */
+};
+
+static int abtn_match __P((struct device *, void *, void *));
+static void abtn_attach __P((struct device *, struct device *, void *));
+static void abtn_adbcomplete __P((caddr_t, caddr_t, int));
+
+struct cfattach abtn_ca = {
+	sizeof(struct abtn_softc), abtn_match, abtn_attach
+};
+struct cfdriver abtn_cd = {
+	NULL, "abtn", DV_DULL
+};
+
+int
+abtn_match(parent, cf, aux)
+	struct device *parent;
+	void *cf;
+	void *aux;
+{
+	struct adb_attach_args *aa = aux;
+
+	if (aa->origaddr == ADBADDR_MISC &&
+	    aa->handler_id == ABTN_HANDLER_ID)
+		return 1;
+
+	return 0;
+}
+
+void
+abtn_attach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct abtn_softc *sc = (struct abtn_softc *)self;
+	struct adb_attach_args *aa = aux;
+	ADBSetInfoBlock adbinfo;
+	int bright;
+
+	printf("brightness/volume button\n");
+
+	bright = pm_read_nvram(NVRAM_BRIGHTNESS);
+	pm_set_brightness(bright);
+	sc->brightness = bright;
+
+	sc->origaddr = aa->origaddr;
+	sc->adbaddr = aa->adbaddr;
+	sc->handler_id = aa->handler_id;
+
+	adbinfo.siServiceRtPtr = (Ptr)abtn_adbcomplete;
+	adbinfo.siDataAreaAddr = (caddr_t)sc;
+
+	SetADBInfo(&adbinfo, sc->adbaddr);
+}
+
+void 
+abtn_adbcomplete(buffer, data, adb_command)
+	caddr_t buffer, data;
+	int adb_command;
+{
+	struct abtn_softc *sc = (struct abtn_softc *)data;
+	u_int cmd;
+
+	cmd = buffer[1];
+
+	switch (cmd) {
+	case 0x0a:
+		sc->brightness -= 8;
+		if (sc->brightness < 8)
+			sc->brightness = 8;
+		pm_set_brightness(sc->brightness);
+		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
+		break;
+
+	case 0x09:
+		sc->brightness += 8;
+		if (sc->brightness > 0x78)
+			sc->brightness = 0x78;
+		pm_set_brightness(sc->brightness);
+		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
+		break;
+	}
+}