Linux Kernel  3.7.1
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pm-mb93093.c
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1 /*
2  * FR-V MB93093 Power Management Routines
3  *
4  * Copyright (c) 2004 Red Hat, Inc.
5  *
6  * Written by: [email protected]
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 
13 #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 
26 static unsigned long imask;
27 /*
28  * Setup interrupt masks, etc to enable wakeup by power switch
29  */
30 static 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  */
40 static 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  */
48 static int mb93093_power_switch_check(void)
49 {
50  return 1;
51 }
52 
53 /*
54  * Initialize power interface
55  */
56 static 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