leds.c revision 1.2
1/* $NetBSD: leds.c,v 1.2 2001/05/16 05:36:56 matt Exp $ */ 2 3/*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross and der Mouse. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * Functions to flash the LEDs with some pattern. 41 */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/device.h> 46#include <sys/conf.h> 47#include <sys/buf.h> 48#include <sys/malloc.h> 49#include <sys/proc.h> 50 51#include <machine/cpu.h> 52#include <machine/sid.h> 53#include <machine/leds.h> 54 55#include "opt_cputype.h" 56 57static volatile u_short *diagreg = 0; 58static u_char led_countdown = 0; 59static u_char led_px = 0; 60 61/* 62 * Initial value is the default pattern set. 63 */ 64static struct led_patterns ledpat = { 65 16, /* divisor */ 66 12, /* patlen */ 67 { /* patterns */ 68 0x03, 0x06, 0x0c, 0x18, 69 0x30, 0x60, 0xc0, 0x60, 70 0x30, 0x18, 0x0c, 0x06, 71 } 72}; 73 74void 75ledsattach(int a) 76{ 77 switch (vax_boardtype) { 78#if VAX46 || VAXANY 79 case VAX_BTYP_46: { 80 extern struct vs_cpu *ka46_cpu; 81 diagreg = (volatile u_short *)(&ka46_cpu->vc_diagdsp); 82 break; 83 } 84#endif 85#if VAX48 || VAXANY 86 case VAX_BTYP_48: { 87 extern struct vs_cpu *ka48_cpu; 88 diagreg = (volatile u_short *)(&ka48_cpu->vc_diagdsp); 89 break; 90 } 91#endif 92#if VAX49 || VAXANY 93 case VAX_BTYP_49: 94 diagreg = (volatile u_short *)vax_map_physmem(0x25800000, 1); 95 diagreg += 2; 96 break; 97#endif 98 default: 99 return; 100 } 101 102 /* Turn on some lights. */ 103 leds_intr(); 104} 105 106/* 107 * This is called by the clock interrupt. 108 */ 109void 110leds_intr() 111{ 112 register u_char i; 113 114 if (diagreg == 0) 115 return; 116 117 if (led_countdown) { 118 led_countdown--; 119 return; 120 } 121 122 led_countdown = ledpat.divisor - 1; 123 i = led_px; 124 125 *diagreg = ~ledpat.pat[i]; 126 127 i = i+1; 128 if (i == ledpat.patlen) 129 i = 0; 130 led_px = i; 131} 132 133/* 134 * This is called by mem.c to handle /dev/leds 135 */ 136int 137leds_uio(struct uio *uio) 138{ 139 int cnt, error; 140 int off; /* NOT off_t */ 141 caddr_t va; 142 143 off = uio->uio_offset; 144 if ((off < 0) || (off > sizeof(ledpat))) 145 return (EIO); 146 147 cnt = min(uio->uio_resid, (sizeof(ledpat) - off)); 148 if (cnt == 0) 149 return (0); /* EOF */ 150 151 va = ((char*)(&ledpat)) + off; 152 error = uiomove(va, cnt, uio); 153 154 return (error); 155} 156 157