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abtn.c revision 1.6 
      1 /*	$NetBSD: abtn.c,v 1.6 2003/03/05 16:18:24 soren 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 #define BUTTON_LOUDER	0x06
     40 #define BUTTON_SOFTER	0x07
     41 #define BUTTON_MUTE	0x08
     42 #define BUTTON_BRIGHTER	0x09
     43 #define BUTTON_DIMMER	0x0a
     44 #define BUTTON_EJECT	0x0b
     45 #define BUTTON_DISPLAY	0x0c
     46 #define BUTTON_KEYPAD	0x7f
     47 #define BUTTON_DEPRESS	0x80
     48 
     49 struct abtn_softc {
     50 	struct device sc_dev;
     51 
     52 	int origaddr;		/* ADB device type */
     53 	int adbaddr;		/* current ADB address */
     54 	int handler_id;
     55 
     56 	int brightness;		/* backlight brightness */
     57 	int volume;		/* speaker volume (not yet) */
     58 };
     59 
     60 static int abtn_match __P((struct device *, struct cfdata *, void *));
     61 static void abtn_attach __P((struct device *, struct device *, void *));
     62 static void abtn_adbcomplete __P((caddr_t, caddr_t, int));
     63 
     64 CFATTACH_DECL(abtn, sizeof(struct abtn_softc),
     65     abtn_match, abtn_attach, NULL, NULL);
     66 
     67 int
     68 abtn_match(parent, cf, aux)
     69 	struct device *parent;
     70 	struct cfdata *cf;
     71 	void *aux;
     72 {
     73 	struct adb_attach_args *aa = aux;
     74 
     75 	if (aa->origaddr == ADBADDR_MISC &&
     76 	    aa->handler_id == ABTN_HANDLER_ID)
     77 		return 1;
     78 
     79 	return 0;
     80 }
     81 
     82 void
     83 abtn_attach(parent, self, aux)
     84 	struct device *parent, *self;
     85 	void *aux;
     86 {
     87 	struct abtn_softc *sc = (struct abtn_softc *)self;
     88 	struct adb_attach_args *aa = aux;
     89 	ADBSetInfoBlock adbinfo;
     90 	int bright;
     91 
     92 	bright = pm_read_nvram(NVRAM_BRIGHTNESS);
     93 	if (bright != 0)
     94 		pm_set_brightness(bright);
     95 	sc->brightness = bright;
     96 
     97 	sc->origaddr = aa->origaddr;
     98 	sc->adbaddr = aa->adbaddr;
     99 	sc->handler_id = aa->handler_id;
    100 
    101 	adbinfo.siServiceRtPtr = (Ptr)abtn_adbcomplete;
    102 	adbinfo.siDataAreaAddr = (caddr_t)sc;
    103 
    104 	SetADBInfo(&adbinfo, sc->adbaddr);
    105 }
    106 
    107 void
    108 abtn_adbcomplete(buffer, data, adb_command)
    109 	caddr_t buffer, data;
    110 	int adb_command;
    111 {
    112 	struct abtn_softc *sc = (struct abtn_softc *)data;
    113 	u_int cmd;
    114 
    115 	cmd = buffer[1];
    116 
    117 	if (cmd >= BUTTON_DEPRESS)
    118 		return;
    119 
    120 	switch (cmd) {
    121 	case BUTTON_DIMMER:
    122 		sc->brightness -= 8;
    123 		if (sc->brightness < 8)
    124 			sc->brightness = 8;
    125 		pm_set_brightness(sc->brightness);
    126 		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
    127 		break;
    128 
    129 	case BUTTON_BRIGHTER:
    130 		sc->brightness += 8;
    131 		if (sc->brightness > 0x78)
    132 			sc->brightness = 0x78;
    133 		pm_set_brightness(sc->brightness);
    134 		pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness);
    135 		break;
    136 
    137 	case BUTTON_MUTE:
    138 	case BUTTON_SOFTER:
    139 	case BUTTON_LOUDER:
    140 		printf("%s: volume setting not implemented\n",
    141 			sc->sc_dev.dv_xname);
    142 		break;
    143 	case BUTTON_DISPLAY:
    144 		printf("%s: display selection not implemented\n",
    145 			sc->sc_dev.dv_xname);
    146 		break;
    147 	case BUTTON_EJECT:
    148 		printf("%s: eject not implemented\n",
    149 			sc->sc_dev.dv_xname);
    150 		break;
    151 
    152 	/* The keyboard gets wacky when in keypad mode. */
    153 	case BUTTON_KEYPAD:
    154 		break;
    155 
    156 	default:
    157 		printf("%s: unknown button 0x%x\n",
    158 			sc->sc_dev.dv_xname, cmd);
    159 	}
    160 }
    161