initial commit with v2.6.9
[linux-2.6.9-moxart.git] / arch / sh / boards / se / 770x / led.c
blob5c64e8ab2cfb9b56b981d28285559eb24e62869c
1 /*
2 * linux/arch/sh/kernel/led_se.c
4 * Copyright (C) 2000 Stuart Menefy <stuart.menefy@st.com>
6 * May be copied or modified under the terms of the GNU General Public
7 * License. See linux/COPYING for more information.
9 * This file contains Solution Engine specific LED code.
12 #include <linux/config.h>
13 #include <asm/se/se.h>
15 static void mach_led(int position, int value)
17 volatile unsigned short* p = (volatile unsigned short*)PA_LED;
19 if (value) {
20 *p |= (1<<8);
21 } else {
22 *p &= ~(1<<8);
26 #ifdef CONFIG_HEARTBEAT
28 #include <linux/sched.h>
30 /* Cycle the LED's in the clasic Knightrider/Sun pattern */
31 void heartbeat_se(void)
33 static unsigned int cnt = 0, period = 0;
34 volatile unsigned short* p = (volatile unsigned short*)PA_LED;
35 static unsigned bit = 0, up = 1;
37 cnt += 1;
38 if (cnt < period) {
39 return;
42 cnt = 0;
44 /* Go through the points (roughly!):
45 * f(0)=10, f(1)=16, f(2)=20, f(5)=35,f(inf)->110
47 period = 110 - ( (300<<FSHIFT)/
48 ((avenrun[0]/5) + (3<<FSHIFT)) );
50 if (up) {
51 if (bit == 7) {
52 bit--;
53 up=0;
54 } else {
55 bit ++;
57 } else {
58 if (bit == 0) {
59 bit++;
60 up=1;
61 } else {
62 bit--;
65 *p = 1<<(bit+8);
68 #endif /* CONFIG_HEARTBEAT */