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abtn.c revision 1.1.2.2 
      1 /*	$NetBSD: abtn.c,v 1.1.2.2 1999/08/02 19:55:12 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/param.h>
     30 #include <sys/device.h>
     31 #include <sys/systm.h>
     32 
     33 #include <macppc/dev/adbvar.h>
     34 
     35 #define NVRAM_BRIGHTNESS 0x140e
     36 #define ABTN_HANDLER_ID 31
     37 
     38 struct abtn_softc {
     39 	struct device sc_dev;
     40 
     41 	int origaddr;		/* ADB device type */
     42 	int adbaddr;		/* current ADB address */
     43 	int handler_id;
     44 
     45 	int brightness;		/* backlight brightness */
     46 	int volume;		/* speaker volume (not yet) */
     47 };
     48 
     49 static int abtn_match __P((struct device *, struct cfdata *, void *));
     50 static void abtn_attach __P((struct device *, struct device *, void *));
     51 static void abtn_adbcomplete __P((caddr_t, caddr_t, int));
     52 
     53 struct cfattach abtn_ca = {
     54 	sizeof(struct abtn_softc), abtn_match, abtn_attach
     55 };
     56 
     57 int
     58 abtn_match(parent, cf, aux)
     59 	struct device *parent;
     60 	struct cfdata *cf;
     61 	void *aux;
     62 {
     63 	struct adb_attach_args *aa = aux;
     64 
     65 	if (aa->origaddr == ADBADDR_MISC &&
     66 	    aa->handler_id == ABTN_HANDLER_ID)
     67 		return 1;
     68 
     69 	return 0;
     70 }
     71 
     72 void
     73 abtn_attach(parent, self, aux)
     74 	struct device *parent, *self;
     75 	void *aux;
     76 {
     77 	struct abtn_softc *sc = (struct abtn_softc *)self;
     78 	struct adb_attach_args *aa = aux;
     79 	ADBSetInfoBlock adbinfo;
     80 	int bright;
     81 
     82 	printf("brightness/volume button\n");
     83 
     84 	bright = pm_read_nvram(NVRAM_BRIGHTNESS);
     85 	pm_set_brightness(bright);
     86 	sc->brightness = bright;
     87 
     88 	sc->origaddr = aa->origaddr;
     89 	sc->adbaddr = aa->adbaddr;
     90 	sc->handler_id = aa->handler_id;
     91 
     92 	adbinfo.siServiceRtPtr = (Ptr)abtn_adbcomplete;
     93 	adbinfo.siDataAreaAddr = (caddr_t)sc;
     94 
     95 	SetADBInfo(&adbinfo, sc->adbaddr);
     96 }
     97 
     98 void
     99 abtn_adbcomplete(buffer, data, adb_command)
    100 	caddr_t buffer, data;
    101 	int adb_command;
    102 {
    103 	struct abtn_softc *sc = (struct abtn_softc *)data;
    104 	u_int cmd;
    105 
    106 	cmd = buffer[1];
    107 
    108 	switch (cmd) {
    109 	case 0x0a:
    110 		sc->brightness -= 8;
    111 		if (sc->brightness < 8)
    112 			sc->brightness = 8;
    113 		pm_set_brightness(sc->brightness);
    114 		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
    115 		break;
    116 
    117 	case 0x09:
    118 		sc->brightness += 8;
    119 		if (sc->brightness > 0x78)
    120 			sc->brightness = 0x78;
    121 		pm_set_brightness(sc->brightness);
    122 		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
    123 		break;
    124 	}
    125 }
    126