74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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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 <wuzj@lemote.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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 <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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#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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/*
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* The i8042 is connnected to i8259A
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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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break;
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default:
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break;
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}
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}
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