Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |