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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * FR-V MB93093 Power Management Routines
3 *
4 * Copyright (c) 2004 Red Hat, Inc.
5 *
6 * Written by: msalter@redhat.com
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License.
10 *
11 */
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/init.h>
14#include <linux/pm.h>
15#include <linux/sched.h>
16#include <linux/interrupt.h>
17#include <linux/sysctl.h>
18#include <linux/errno.h>
19#include <linux/delay.h>
20#include <asm/uaccess.h>
21
22#include <asm/mb86943a.h>
23
24#include "local.h"
25
26static unsigned long imask;
27/*
28 * Setup interrupt masks, etc to enable wakeup by power switch
29 */
30static void mb93093_power_switch_setup(void)
31{
32 /* mask all but FPGA interrupt sources. */
33 imask = *(volatile unsigned long *)0xfeff9820;
34 *(volatile unsigned long *)0xfeff9820 = ~(1 << (IRQ_XIRQ2_LEVEL + 16)) & 0xfffe0000;
35}
36
37/*
38 * Cleanup interrupt masks, etc after wakeup by power switch
39 */
40static void mb93093_power_switch_cleanup(void)
41{
42 *(volatile unsigned long *)0xfeff9820 = imask;
43}
44
45/*
46 * Return non-zero if wakeup irq was caused by power switch
47 */
48static int mb93093_power_switch_check(void)
49{
50 return 1;
51}
52
53/*
54 * Initialize power interface
55 */
56static int __init mb93093_pm_init(void)
57{
58 __power_switch_wake_setup = mb93093_power_switch_setup;
59 __power_switch_wake_check = mb93093_power_switch_check;
60 __power_switch_wake_cleanup = mb93093_power_switch_cleanup;
61 return 0;
62}
63
64__initcall(mb93093_pm_init);
65