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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 <linux/module.h>
#include <asm/i8259.h>
#include <asm/mipsregs.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include "ec_kb3310b.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;
}
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();
/* Wakeup CPU via SCI lid open event */
outb(irq_mask & ~(1 << PIC_CASCADE_IR), PIC_MASTER_IMR);
inb(PIC_MASTER_IMR);
outb(0xff & ~(1 << (SCI_IRQ_NUM - 8)), PIC_SLAVE_IMR);
inb(PIC_SLAVE_IMR);
break;
default:
break;
}
}
static struct delayed_work lid_task;
static int initialized;
/* yeeloong_report_lid_status will be implemented in yeeloong_laptop.c */
sci_handler yeeloong_report_lid_status;
EXPORT_SYMBOL(yeeloong_report_lid_status);
static void yeeloong_lid_update_task(struct work_struct *work)
{
if (yeeloong_report_lid_status)
yeeloong_report_lid_status(BIT_LID_DETECT_ON);
}
int wakeup_loongson(void)
{
int irq;
/* query the interrupt number */
irq = mach_i8259_irq();
if (irq < 0)
return 0;
printk(KERN_INFO "%s: irq = %d\n", __func__, irq);
if (irq == I8042_KBD_IRQ)
return 1;
else if (irq == SCI_IRQ_NUM) {
int ret, sci_event;
/* query the event number */
ret = ec_query_seq(CMD_GET_EVENT_NUM);
if (ret < 0)
return 0;
sci_event = ec_get_event_num();
if (sci_event < 0)
return 0;
if (sci_event == EVENT_LID) {
int lid_status;
/* check the LID status */
lid_status = ec_read(REG_LID_DETECT);
/* wakeup cpu when people open the LID */
if (lid_status == BIT_LID_DETECT_ON) {
/* If we call it directly here, the WARNING
* will be sent out by getnstimeofday
* via "WARN_ON(timekeeping_suspended);"
* because we can not schedule in suspend mode.
*/
if (initialized == 0) {
INIT_DELAYED_WORK(&lid_task,
yeeloong_lid_update_task);
initialized = 1;
}
schedule_delayed_work(&lid_task, 1);
return 1;
}
}
}
return 0;
}
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