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