1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
64 lines
1 KiB
C
64 lines
1 KiB
C
/*
|
|
* linux/arch/sh/kernel/led_mpc1211.c
|
|
*
|
|
* Copyright (C) 2001 Saito.K & Jeanne
|
|
*
|
|
* This file contains Interface MPC-1211 specific LED code.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
|
|
static void mach_led(int position, int value)
|
|
{
|
|
volatile unsigned char* p = (volatile unsigned char*)0xa2000000;
|
|
|
|
if (value) {
|
|
*p |= 1;
|
|
} else {
|
|
*p &= ~1;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_HEARTBEAT
|
|
|
|
#include <linux/sched.h>
|
|
|
|
/* Cycle the LED's in the clasic Knightrider/Sun pattern */
|
|
void heartbeat_mpc1211(void)
|
|
{
|
|
static unsigned int cnt = 0, period = 0;
|
|
volatile unsigned char* p = (volatile unsigned char*)0xa2000000;
|
|
static unsigned bit = 0, up = 1;
|
|
|
|
cnt += 1;
|
|
if (cnt < period) {
|
|
return;
|
|
}
|
|
|
|
cnt = 0;
|
|
|
|
/* Go through the points (roughly!):
|
|
* f(0)=10, f(1)=16, f(2)=20, f(5)=35,f(inf)->110
|
|
*/
|
|
period = 110 - ( (300<<FSHIFT)/
|
|
((avenrun[0]/5) + (3<<FSHIFT)) );
|
|
|
|
if (up) {
|
|
if (bit == 7) {
|
|
bit--;
|
|
up=0;
|
|
} else {
|
|
bit ++;
|
|
}
|
|
} else {
|
|
if (bit == 0) {
|
|
bit++;
|
|
up=1;
|
|
} else {
|
|
bit--;
|
|
}
|
|
}
|
|
*p = 1<<bit;
|
|
|
|
}
|
|
#endif /* CONFIG_HEARTBEAT */
|