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 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 */ mb93093_power_switch_setup(void)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 */ mb93093_power_switch_cleanup(void)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 */ mb93093_power_switch_check(void)48static int mb93093_power_switch_check(void) 49 { 50 return 1; 51 } 52 53 /* 54 * Initialize power interface 55 */ mb93093_pm_init(void)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 66