146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Lemote loongson2f family machines' specific suspend support
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*
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* Copyright (C) 2009 Lemote Inc.
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* Author: Wu Zhangjin <wuzhangjin@gmail.com>
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*/
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#include <linux/suspend.h>
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#include <linux/interrupt.h>
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#include <linux/pm.h>
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#include <linux/i8042.h>
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#include <linux/export.h>
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#include <asm/i8259.h>
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#include <asm/mipsregs.h>
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#include <asm/bootinfo.h>
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#include <loongson.h>
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#include <cs5536/cs5536_mfgpt.h>
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#include "ec_kb3310b.h"
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#define I8042_KBD_IRQ 1
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#define I8042_CTR_KBDINT 0x01
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#define I8042_CTR_KBDDIS 0x10
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static unsigned char i8042_ctr;
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static int i8042_enable_kbd_port(void)
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{
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if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) {
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pr_err("i8042.c: Can't read CTR while enabling i8042 kbd port."
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"\n");
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return -EIO;
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}
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i8042_ctr &= ~I8042_CTR_KBDDIS;
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i8042_ctr |= I8042_CTR_KBDINT;
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if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
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i8042_ctr &= ~I8042_CTR_KBDINT;
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i8042_ctr |= I8042_CTR_KBDDIS;
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pr_err("i8042.c: Failed to enable KBD port.\n");
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return -EIO;
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}
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return 0;
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}
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void setup_wakeup_events(void)
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{
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int irq_mask;
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switch (mips_machtype) {
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case MACH_LEMOTE_ML2F7:
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case MACH_LEMOTE_YL2F89:
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/* open the keyboard irq in i8259A */
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outb((0xff & ~(1 << I8042_KBD_IRQ)), PIC_MASTER_IMR);
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irq_mask = inb(PIC_MASTER_IMR);
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/* enable keyboard port */
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i8042_enable_kbd_port();
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/* Wakeup CPU via SCI lid open event */
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outb(irq_mask & ~(1 << PIC_CASCADE_IR), PIC_MASTER_IMR);
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inb(PIC_MASTER_IMR);
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outb(0xff & ~(1 << (SCI_IRQ_NUM - 8)), PIC_SLAVE_IMR);
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inb(PIC_SLAVE_IMR);
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break;
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default:
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break;
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}
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}
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static struct delayed_work lid_task;
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static int initialized;
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/* yeeloong_report_lid_status will be implemented in yeeloong_laptop.c */
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sci_handler yeeloong_report_lid_status;
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EXPORT_SYMBOL(yeeloong_report_lid_status);
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static void yeeloong_lid_update_task(struct work_struct *work)
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{
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if (yeeloong_report_lid_status)
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yeeloong_report_lid_status(BIT_LID_DETECT_ON);
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}
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int wakeup_loongson(void)
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{
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int irq;
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/* query the interrupt number */
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irq = mach_i8259_irq();
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if (irq < 0)
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return 0;
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printk(KERN_INFO "%s: irq = %d\n", __func__, irq);
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if (irq == I8042_KBD_IRQ)
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return 1;
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else if (irq == SCI_IRQ_NUM) {
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int ret, sci_event;
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/* query the event number */
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ret = ec_query_seq(CMD_GET_EVENT_NUM);
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if (ret < 0)
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return 0;
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sci_event = ec_get_event_num();
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if (sci_event < 0)
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return 0;
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if (sci_event == EVENT_LID) {
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int lid_status;
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/* check the LID status */
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lid_status = ec_read(REG_LID_DETECT);
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/* wakeup cpu when people open the LID */
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if (lid_status == BIT_LID_DETECT_ON) {
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/* If we call it directly here, the WARNING
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* will be sent out by getnstimeofday
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* via "WARN_ON(timekeeping_suspended);"
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* because we can not schedule in suspend mode.
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*/
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if (initialized == 0) {
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INIT_DELAYED_WORK(&lid_task,
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yeeloong_lid_update_task);
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initialized = 1;
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}
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schedule_delayed_work(&lid_task, 1);
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return 1;
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}
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}
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}
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return 0;
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}
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void __weak mach_suspend(void)
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{
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disable_mfgpt0_counter();
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}
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void __weak mach_resume(void)
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{
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enable_mfgpt0_counter();
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}
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