1/*
2 * Cobalt Reset operations
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 1995, 1996, 1997 by Ralf Baechle
9 * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
10 */
11#include <linux/jiffies.h>
12
13#include <asm/io.h>
14#include <asm/reboot.h>
15
16#include <cobalt.h>
17
18void cobalt_machine_halt(void)
19{
20	int state, last, diff;
21	unsigned long mark;
22
23	/*
24	 * turn off bar on Qube, flash power off LED on RaQ (0.5Hz)
25	 *
26	 * restart if ENTER and SELECT are pressed
27	 */
28
29	last = COBALT_KEY_PORT;
30
31	for (state = 0;;) {
32
33		state ^= COBALT_LED_POWER_OFF;
34		COBALT_LED_PORT = state;
35
36		diff = COBALT_KEY_PORT ^ last;
37		last ^= diff;
38
39		if((diff & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)) && !(~last & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)))
40			COBALT_LED_PORT = COBALT_LED_RESET;
41
42		for (mark = jiffies; jiffies - mark < HZ;)
43			;
44	}
45}
46
47void cobalt_machine_restart(char *command)
48{
49	COBALT_LED_PORT = COBALT_LED_RESET;
50
51	/* we should never get here */
52	cobalt_machine_halt();
53}
54
55/*
56 * This triggers the luser mode device driver for the power switch ;-)
57 */
58void cobalt_machine_power_off(void)
59{
60	printk("You can switch the machine off now.\n");
61	cobalt_machine_halt();
62}
63