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/* $OpenBSD: led.c,v 1.4 1998/09/15 04:27:08 jason Exp $ */
/*
* Copyright (c) 1998 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <machine/autoconf.h>
#include <machine/ctlreg.h>
#include <sparc/sparc/asm.h>
#include <sparc/dev/led.h>
/*
* This is the driver for the "led" register available on some Sun4
* machines.
*/
static int ledmatch __P((struct device *, void *, void *));
static void ledattach __P((struct device *, struct device *, void *));
struct cfattach led_ca = {
sizeof(struct device), ledmatch, ledattach
};
struct cfdriver led_cd = {
NULL, "led", DV_DULL
};
extern int sparc_led_blink; /* from machdep */
static char led_attached = 0;
static int led_index = 0;
/*
* These led patterns produce a line that scrolls across the display, then
* back again. Note that a value of 0 for a particular bit lights the
* corresponding LED, and 1 leaves it dark.
*/
static char led_patterns[] =
{ 0xff, 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0xfe,
0xff, 0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f, };
static int
ledmatch(parent, vcf, aux)
struct device *parent;
void *aux, *vcf;
{
register struct confargs *ca = aux;
if (CPU_ISSUN4)
return (strcmp("led", ca->ca_ra.ra_name) == 0);
return (0);
}
/* ARGSUSED */
static void
ledattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
led_attached = 1;
printf("\n");
/* In case it's initialized to true... */
if (sparc_led_blink)
led_sun4_cycle((caddr_t)0);
}
/*
* Check to see whether we were configured and whether machdep.led_blink != 0.
* If so, put a new pattern into the register and schedule ourselves to
* be called again later. The timeout is set to: [(1/8) * loadavg] seconds.
*/
void
led_sun4_cycle(zero)
void *zero;
{
int s;
if (!sparc_led_blink || !led_attached)
return;
led_index = (led_index + 1) % sizeof(led_patterns);
s = splhigh();
stba(AC_DIAG_REG, ASI_CONTROL, led_patterns[led_index]);
splx(s);
s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 3));
timeout(led_sun4_cycle, (caddr_t)0, s);
}
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