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abtn.c revision 1.3 
      1 /*	$NetBSD: abtn.c,v 1.3 2001/06/08 00:32:01 matt 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 #include <macppc/dev/pm_direct.h>
     35 
     36 #define NVRAM_BRIGHTNESS 0x140e
     37 #define ABTN_HANDLER_ID 31
     38 
     39 struct abtn_softc {
     40 	struct device sc_dev;
     41 
     42 	int origaddr;		/* ADB device type */
     43 	int adbaddr;		/* current ADB address */
     44 	int handler_id;
     45 
     46 	int brightness;		/* backlight brightness */
     47 	int volume;		/* speaker volume (not yet) */
     48 };
     49 
     50 static int abtn_match __P((struct device *, struct cfdata *, void *));
     51 static void abtn_attach __P((struct device *, struct device *, void *));
     52 static void abtn_adbcomplete __P((caddr_t, caddr_t, int));
     53 
     54 struct cfattach abtn_ca = {
     55 	sizeof(struct abtn_softc), abtn_match, abtn_attach
     56 };
     57 
     58 int
     59 abtn_match(parent, cf, aux)
     60 	struct device *parent;
     61 	struct cfdata *cf;
     62 	void *aux;
     63 {
     64 	struct adb_attach_args *aa = aux;
     65 
     66 	if (aa->origaddr == ADBADDR_MISC &&
     67 	    aa->handler_id == ABTN_HANDLER_ID)
     68 		return 1;
     69 
     70 	return 0;
     71 }
     72 
     73 void
     74 abtn_attach(parent, self, aux)
     75 	struct device *parent, *self;
     76 	void *aux;
     77 {
     78 	struct abtn_softc *sc = (struct abtn_softc *)self;
     79 	struct adb_attach_args *aa = aux;
     80 	ADBSetInfoBlock adbinfo;
     81 	int bright;
     82 
     83 	printf("brightness/volume button\n");
     84 
     85 	bright = pm_read_nvram(NVRAM_BRIGHTNESS);
     86 	if (bright != 0)
     87 		pm_set_brightness(bright);
     88 	sc->brightness = bright;
     89 
     90 	sc->origaddr = aa->origaddr;
     91 	sc->adbaddr = aa->adbaddr;
     92 	sc->handler_id = aa->handler_id;
     93 
     94 	adbinfo.siServiceRtPtr = (Ptr)abtn_adbcomplete;
     95 	adbinfo.siDataAreaAddr = (caddr_t)sc;
     96 
     97 	SetADBInfo(&adbinfo, sc->adbaddr);
     98 }
     99 
    100 void
    101 abtn_adbcomplete(buffer, data, adb_command)
    102 	caddr_t buffer, data;
    103 	int adb_command;
    104 {
    105 	struct abtn_softc *sc = (struct abtn_softc *)data;
    106 	u_int cmd;
    107 
    108 	cmd = buffer[1];
    109 
    110 	switch (cmd) {
    111 	case 0x0a:
    112 		sc->brightness -= 8;
    113 		if (sc->brightness < 8)
    114 			sc->brightness = 8;
    115 		pm_set_brightness(sc->brightness);
    116 		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
    117 		break;
    118 
    119 	case 0x09:
    120 		sc->brightness += 8;
    121 		if (sc->brightness > 0x78)
    122 			sc->brightness = 0x78;
    123 		pm_set_brightness(sc->brightness);
    124 		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
    125 		break;
    126 	}
    127 }
    128