summaryrefslogtreecommitdiff
path: root/arch/mips/loongson64/lemote-2f/pm.c
blob: 3d0027229e3ccc44ae4ab606fe625f216208c57c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
// 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();
}