103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/*
|
|
* linux/arch/sh/kernel/led_microdev.c
|
|
*
|
|
* Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com>
|
|
* Copyright (C) 2003 Richard Curnow (Richard.Curnow@superh.com)
|
|
*
|
|
* May be copied or modified under the terms of the GNU General Public
|
|
* License. See linux/COPYING for more information.
|
|
*
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/io.h>
|
|
|
|
#define LED_REGISTER 0xa6104d20
|
|
|
|
static void mach_led_d9(int value)
|
|
{
|
|
unsigned long reg;
|
|
reg = ctrl_inl(LED_REGISTER);
|
|
reg &= ~1;
|
|
reg |= (value & 1);
|
|
ctrl_outl(reg, LED_REGISTER);
|
|
return;
|
|
}
|
|
|
|
static void mach_led_d10(int value)
|
|
{
|
|
unsigned long reg;
|
|
reg = ctrl_inl(LED_REGISTER);
|
|
reg &= ~2;
|
|
reg |= ((value & 1) << 1);
|
|
ctrl_outl(reg, LED_REGISTER);
|
|
return;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_HEARTBEAT
|
|
#include <linux/sched.h>
|
|
|
|
static unsigned char banner_table[] = {
|
|
0x11, 0x01, 0x11, 0x01, 0x11, 0x03,
|
|
0x11, 0x01, 0x11, 0x01, 0x13, 0x03,
|
|
0x11, 0x01, 0x13, 0x01, 0x13, 0x01, 0x11, 0x03,
|
|
0x11, 0x03,
|
|
0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
|
|
0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x11, 0x07,
|
|
0x13, 0x01, 0x13, 0x03,
|
|
0x11, 0x01, 0x11, 0x03,
|
|
0x13, 0x01, 0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
|
|
0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
|
|
0x13, 0x01, 0x13, 0x01, 0x13, 0x03,
|
|
0x13, 0x01, 0x11, 0x01, 0x11, 0x03,
|
|
0x11, 0x03,
|
|
0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x13, 0x07,
|
|
0xff
|
|
};
|
|
|
|
static void banner(void)
|
|
{
|
|
static int pos = 0;
|
|
static int count = 0;
|
|
|
|
if (count) {
|
|
count--;
|
|
} else {
|
|
int val = banner_table[pos];
|
|
if (val == 0xff) {
|
|
pos = 0;
|
|
val = banner_table[pos];
|
|
}
|
|
pos++;
|
|
mach_led_d10((val >> 4) & 1);
|
|
count = 10 * (val & 0xf);
|
|
}
|
|
}
|
|
|
|
/* From heartbeat_harp in the stboards directory */
|
|
/* acts like an actual heart beat -- ie thump-thump-pause... */
|
|
void microdev_heartbeat(void)
|
|
{
|
|
static unsigned cnt = 0, period = 0, dist = 0;
|
|
|
|
if (cnt == 0 || cnt == dist)
|
|
mach_led_d9(1);
|
|
else if (cnt == 7 || cnt == dist+7)
|
|
mach_led_d9(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;
|
|
}
|
|
|
|
banner();
|
|
}
|
|
|
|
#endif
|