55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
|
/*
|
||
|
|
* linux/arch/sh/kernel/led_bigsur.c
|
||
|
|
*
|
||
|
|
* By Dustin McIntire (dustin@sensoria.com) (c)2001
|
||
|
|
* Derived from led_se.c and led.c, which bore the message:
|
||
|
|
* Copyright (C) 2000 Stuart Menefy <stuart.menefy@st.com>
|
||
|
|
*
|
||
|
|
* May be copied or modified under the terms of the GNU General Public
|
||
|
|
* License. See linux/COPYING for more information.
|
||
|
|
*
|
||
|
|
* This file contains Big Sur specific LED code.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <asm/bigsur/bigsur.h>
|
||
|
|
|
||
|
|
static void mach_led(int position, int value)
|
||
|
|
{
|
||
|
|
int word;
|
||
|
|
|
||
|
|
word = bigsur_inl(BIGSUR_CSLR);
|
||
|
|
if (value) {
|
||
|
|
bigsur_outl(word & ~BIGSUR_LED, BIGSUR_CSLR);
|
||
|
|
} else {
|
||
|
|
bigsur_outl(word | BIGSUR_LED, BIGSUR_CSLR);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_HEARTBEAT
|
||
|
|
|
||
|
|
#include <linux/sched.h>
|
||
|
|
|
||
|
|
/* Cycle the LED on/off */
|
||
|
|
void heartbeat_bigsur(void)
|
||
|
|
{
|
||
|
|
static unsigned cnt = 0, period = 0, dist = 0;
|
||
|
|
|
||
|
|
if (cnt == 0 || cnt == dist)
|
||
|
|
mach_led( -1, 1);
|
||
|
|
else if (cnt == 7 || cnt == dist+7)
|
||
|
|
mach_led( -1, 0);
|
||
|
|
|
||
|
|
if (++cnt > period) {
|
||
|
|
cnt = 0;
|
||
|
|
/* The hyperbolic function below modifies the heartbeat period
|
||
|
|
* length in dependency of the current (5min) load. It goes
|
||
|
|
* through the points f(0)=126, f(1)=86, f(5)=51,
|
||
|
|
* f(inf)->30. */
|
||
|
|
period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
|
||
|
|
dist = period / 4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_HEARTBEAT */
|
||
|
|
|