leds.c revision 1.7
1/* $NetBSD: leds.c,v 1.7 2008/04/28 20:23:39 martin 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 1.7 2008/04/28 20:23:39 martin Exp $"); 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/device.h> 42#include <sys/conf.h> 43#include <sys/buf.h> 44#include <sys/malloc.h> 45#include <sys/proc.h> 46 47#include <machine/cpu.h> 48#include <machine/sid.h> 49#include <machine/leds.h> 50 51#include "opt_cputype.h" 52 53static volatile u_short *diagreg = 0; 54static u_char led_countdown = 0; 55static u_char led_px = 0; 56 57/* 58 * Initial value is the default pattern set. 59 */ 60static const struct led_patterns ledpat = { 61 16, /* divisor */ 62 12, /* patlen */ 63 { /* patterns */ 64 0x03, 0x06, 0x0c, 0x18, 65 0x30, 0x60, 0xc0, 0x60, 66 0x30, 0x18, 0x0c, 0x06, 67 } 68}; 69 70void 71ledsattach(int a) 72{ 73 switch (vax_boardtype) { 74#if VAX46 || VAXANY 75 case VAX_BTYP_46: { 76 extern struct vs_cpu *ka46_cpu; 77 diagreg = (volatile u_short *)(&ka46_cpu->vc_diagdsp); 78 break; 79 } 80#endif 81#if VAX48 || VAXANY 82 case VAX_BTYP_48: { 83 extern struct vs_cpu *ka48_cpu; 84 diagreg = (volatile u_short *)(&ka48_cpu->vc_diagdsp); 85 break; 86 } 87#endif 88#if VAX49 || VAXANY 89 case VAX_BTYP_49: 90 diagreg = (volatile u_short *)vax_map_physmem(0x25800000, 1); 91 diagreg += 2; 92 break; 93#endif 94 default: 95 return; 96 } 97 98 /* Turn on some lights. */ 99 leds_intr(); 100} 101 102/* 103 * This is called by the clock interrupt. 104 */ 105void 106leds_intr(void) 107{ 108 register u_char i; 109 110 if (diagreg == 0) 111 return; 112 113 if (led_countdown) { 114 led_countdown--; 115 return; 116 } 117 118 led_countdown = ledpat.divisor - 1; 119 i = led_px; 120 121 *diagreg = ~ledpat.pat[i]; 122 123 i = i+1; 124 if (i == ledpat.patlen) 125 i = 0; 126 led_px = i; 127} 128 129/* 130 * This is called by mem.c to handle /dev/leds 131 */ 132int 133leds_uio(struct uio *uio) 134{ 135 int cnt, error; 136 int off; /* NOT off_t */ 137 void *va; 138 139 off = uio->uio_offset; 140 if ((off < 0) || (off > sizeof(ledpat))) 141 return (EIO); 142 143 cnt = min(uio->uio_resid, (sizeof(ledpat) - off)); 144 if (cnt == 0) 145 return (0); /* EOF */ 146 147 va = ((char*)(&ledpat)) + off; 148 error = uiomove(va, cnt, uio); 149 150 return (error); 151} 152 153