146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Lemote loongson2f family machines' specific suspend support
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Lemote Inc.
|
||
|
|
* Author: Wu Zhangjin <wuzhangjin@gmail.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/suspend.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/pm.h>
|
||
|
|
#include <linux/i8042.h>
|
||
|
|
#include <linux/export.h>
|
||
|
|
|
||
|
|
#include <asm/i8259.h>
|
||
|
|
#include <asm/mipsregs.h>
|
||
|
|
#include <asm/bootinfo.h>
|
||
|
|
|
||
|
|
#include <loongson.h>
|
||
|
|
|
||
|
|
#include <cs5536/cs5536_mfgpt.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;
|
||
|
|
}
|
||
|
|
|
||
|
|
void __weak mach_suspend(void)
|
||
|
|
{
|
||
|
|
disable_mfgpt0_counter();
|
||
|
|
}
|
||
|
|
|
||
|
|
void __weak mach_resume(void)
|
||
|
|
{
|
||
|
|
enable_mfgpt0_counter();
|
||
|
|
}
|