1 /* $NetBSD: abtn.c,v 1.5 2002/10/02 05:30:38 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 #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 CFATTACH_DECL(abtn, sizeof(struct abtn_softc), 55 abtn_match, abtn_attach, NULL, NULL); 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 if (bright != 0) 86 pm_set_brightness(bright); 87 sc->brightness = bright; 88 89 sc->origaddr = aa->origaddr; 90 sc->adbaddr = aa->adbaddr; 91 sc->handler_id = aa->handler_id; 92 93 adbinfo.siServiceRtPtr = (Ptr)abtn_adbcomplete; 94 adbinfo.siDataAreaAddr = (caddr_t)sc; 95 96 SetADBInfo(&adbinfo, sc->adbaddr); 97 } 98 99 void 100 abtn_adbcomplete(buffer, data, adb_command) 101 caddr_t buffer, data; 102 int adb_command; 103 { 104 struct abtn_softc *sc = (struct abtn_softc *)data; 105 u_int cmd; 106 107 cmd = buffer[1]; 108 109 switch (cmd) { 110 case 0x0a: 111 sc->brightness -= 8; 112 if (sc->brightness < 8) 113 sc->brightness = 8; 114 pm_set_brightness(sc->brightness); 115 pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness); 116 break; 117 118 case 0x09: 119 sc->brightness += 8; 120 if (sc->brightness > 0x78) 121 sc->brightness = 0x78; 122 pm_set_brightness(sc->brightness); 123 pm_write_nvram(NVRAM_BRIGHTNESS, sc->brightness); 124 break; 125 } 126 } 127