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/* $OpenBSD: abtn.c,v 1.2 2001/07/04 08:38:49 niklas Exp $ */
/* $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;
}
}
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