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/*
* Lemote loongson2f family machines' specific suspend support
*
* Copyright (C) 2009 Lemote Inc.
* Author: Wu Zhangjin <wuzj@lemote.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/suspend.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/i8042.h>
#include <asm/i8259.h>
#include <asm/mipsregs.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#define I8042_KBD_IRQ 1
#define I8042_CTR_KBDINT 0x01
#define I8042_CTR_KBDDIS 0x10
static unsigned char i8042_ctr;
static int i8042_enable_kbd_port(void)
{
if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) {
pr_err("i8042.c: Can't read CTR while enabling i8042 kbd port."
"\n");
return -EIO;
}
i8042_ctr &= ~I8042_CTR_KBDDIS;
i8042_ctr |= I8042_CTR_KBDINT;
if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
i8042_ctr &= ~I8042_CTR_KBDINT;
i8042_ctr |= I8042_CTR_KBDDIS;
pr_err("i8042.c: Failed to enable KBD port.\n");
return -EIO;
}
return 0;
}
/*
* The i8042 is connnected to i8259A
*/
void setup_wakeup_events(void)
{
int irq_mask;
switch (mips_machtype) {
case MACH_LEMOTE_ML2F7:
case MACH_LEMOTE_YL2F89:
/* open the keyboard irq in i8259A */
outb((0xff & ~(1 << I8042_KBD_IRQ)), PIC_MASTER_IMR);
irq_mask = inb(PIC_MASTER_IMR);
/* enable keyboard port */
i8042_enable_kbd_port();
break;
default:
break;
}
}
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