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/*
* Cobalt Reset operations
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 1996, 1997 by Ralf Baechle
* Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/leds.h>
#include <cobalt.h>
#define RESET_PORT ((void __iomem *)CKSEG1ADDR(0x1c000000))
#define RESET 0x0f
DEFINE_LED_TRIGGER(power_off_led_trigger);
static int __init ledtrig_power_off_init(void)
{
led_trigger_register_simple("power-off", &power_off_led_trigger);
return 0;
}
device_initcall(ledtrig_power_off_init);
void cobalt_machine_halt(void)
{
int state, last, diff;
unsigned long mark;
/*
* turn on power off LED on RaQ
*
* restart if ENTER and SELECT are pressed
*/
last = COBALT_KEY_PORT;
led_trigger_event(power_off_led_trigger, LED_FULL);
for (state = 0;;) {
diff = COBALT_KEY_PORT ^ last;
last ^= diff;
if((diff & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)) && !(~last & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)))
writeb(RESET, RESET_PORT);
for (mark = jiffies; jiffies - mark < HZ;)
;
}
}
void cobalt_machine_restart(char *command)
{
writeb(RESET, RESET_PORT);
/* we should never get here */
cobalt_machine_halt();
}
/*
* This triggers the luser mode device driver for the power switch ;-)
*/
void cobalt_machine_power_off(void)
{
printk("You can switch the machine off now.\n");
cobalt_machine_halt();
}
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