leds.c revision 1.11
1/* $NetBSD: leds.c,v 1.11 2023/12/20 15:34:46 thorpej 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * Functions to flash the LEDs with some pattern. 34 */ 35 36#include <sys/cdefs.h> 37__KERNEL_RCSID(0, "$NetBSD: leds.c,v 1.11 2023/12/20 15:34:46 thorpej Exp $"); 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/cpu.h> 42#include <sys/conf.h> 43#include <sys/device.h> 44#include <sys/proc.h> 45 46#include <machine/sid.h> 47#include <machine/leds.h> 48 49#include "opt_cputype.h" 50 51static volatile u_short *diagreg = 0; 52static u_char led_countdown = 0; 53static u_char led_px = 0; 54 55/* 56 * Initial value is the default pattern set. 57 */ 58struct led_patterns ledpat = { 59 16, /* divisor */ 60 12, /* patlen */ 61 { /* patterns */ 62 0x03, 0x06, 0x0c, 0x18, 63 0x30, 0x60, 0xc0, 0x60, 64 0x30, 0x18, 0x0c, 0x06, 65 } 66}; 67 68void 69ledsattach(int a) 70{ 71 switch (vax_boardtype) { 72#if VAX46 || VAXANY 73 case VAX_BTYP_46: { 74 extern struct vs_cpu *ka46_cpu; 75 diagreg = (volatile u_short *)(&ka46_cpu->vc_diagdsp); 76 break; 77 } 78#endif 79#if VAX48 || VAXANY 80 case VAX_BTYP_48: { 81 extern struct vs_cpu *ka48_cpu; 82 diagreg = (volatile u_short *)(&ka48_cpu->vc_diagdsp); 83 break; 84 } 85#endif 86#if VAX49 || VAXANY 87 case VAX_BTYP_49: 88 diagreg = (volatile u_short *)vax_map_physmem(0x25800000, 1); 89 diagreg += 2; 90 break; 91#endif 92 default: 93 return; 94 } 95 96 /* Turn on some lights. */ 97 leds_intr(); 98} 99 100/* 101 * This is called by the clock interrupt. 102 */ 103void 104leds_intr(void) 105{ 106 register u_char i; 107 108 if (diagreg == 0) 109 return; 110 111 if (led_countdown) { 112 led_countdown--; 113 return; 114 } 115 116 led_countdown = ledpat.divisor - 1; 117 i = led_px; 118 119 *diagreg = ~ledpat.pat[i]; 120 121 i = i+1; 122 if (i == ledpat.patlen) 123 i = 0; 124 led_px = i; 125} 126 127/* 128 * This is called by mem.c to handle /dev/leds 129 */ 130int 131leds_uio(struct uio *uio) 132{ 133 int cnt, error; 134 int off; /* NOT off_t */ 135 char *va; 136 137 off = uio->uio_offset; 138 if ((off < 0) || (off > sizeof(ledpat))) 139 return (EIO); 140 141 cnt = uimin(uio->uio_resid, (sizeof(ledpat) - off)); 142 if (cnt == 0) 143 return (0); /* EOF */ 144 145 146 va = (char *)&ledpat; 147 va = va + off; 148 error = uiomove(va, cnt, uio); 149 150 return (error); 151} 152 153