Add /dev/leds support for the 3/470.
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gwr
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/* $NetBSD: leds.h,v 1.1 1997/04/25 15:15:45 gwr Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross and der Mouse.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Data structure supported by /dev/leds */
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struct led_patterns {
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u_char divisor; /* divides 100 Hz clock (0 means 256). */
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u_char patlen; /* patterns to use (0 means 256). */
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u_char pat[256]; /* the patters... */
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};
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/* $NetBSD: leds.c,v 1.1 1997/04/25 15:15:47 gwr Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross and der Mouse.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Functions to flash the LEDs with some pattern.
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* The 3/80 has just one LED on the front panel,
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* which we turn on during boot and leave alone.
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* The 3/470 has the usual 8-position LED array,
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* in which some pattern is animated.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <machine/autoconf.h>
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#include <machine/obio.h>
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#include <machine/leds.h>
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#include <machine/machdep.h>
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static u_char led_countdown = 0;
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static u_char led_px = 0;
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/* Initial value is the default pattern set. */
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static struct led_patterns ledpat = {
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8, /* divisor */
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8, /* patlen */
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{ /* patterns */
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0xF0, 0xE1, 0xC3, 0x87,
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0x0F, 0x1E, 0x3C, 0x78
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}
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};
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static char *diagreg;
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/*
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* This is called early during startup to find the
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* diag register (LEDs) and turn on the light(s).
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*/
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void
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leds_init()
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{
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diagreg = obio_find_mapping(OBIO_DIAGREG, 1);
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*diagreg = 0; /* active low (all on) */
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}
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/*
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* This is called by the clock interrupt.
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*/
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void
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leds_intr()
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{
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register u_char i;
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if (led_countdown) {
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led_countdown--;
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return;
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}
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led_countdown = ledpat.divisor - 1;
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i = led_px;
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*diagreg = (char) ledpat.pat[i];
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i = i+1;
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if (i == ledpat.patlen)
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i = 0;
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led_px = i;
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}
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/*
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* This is called by mem.c to handle /dev/leds
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*/
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int
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leds_uio(struct uio *uio)
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{
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int cnt, error;
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int off; /* NOT off_t */
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caddr_t va;
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off = uio->uio_offset;
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if ((off < 0) || (off > sizeof(ledpat)))
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return (EFAULT);
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cnt = min(uio->uio_resid, (sizeof(ledpat) - off));
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if (cnt == 0)
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return (0); /* EOF */
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va = ((char*)(&ledpat)) + off;
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error = uiomove(va, cnt, uio);
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return (error);
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}
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