1 /*
2 * Lemote loongson2f family machines' specific suspend support
3 *
4 * Copyright (C) 2009 Lemote Inc.
5 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13 #include <linux/suspend.h>
14 #include <linux/interrupt.h>
15 #include <linux/pm.h>
16 #include <linux/i8042.h>
17 #include <linux/export.h>
18
19 #include <asm/i8259.h>
20 #include <asm/mipsregs.h>
21 #include <asm/bootinfo.h>
22
23 #include <loongson.h>
24
25 #include <cs5536/cs5536_mfgpt.h>
26 #include "ec_kb3310b.h"
27
28 #define I8042_KBD_IRQ 1
29 #define I8042_CTR_KBDINT 0x01
30 #define I8042_CTR_KBDDIS 0x10
31
32 static unsigned char i8042_ctr;
33
i8042_enable_kbd_port(void)34 static int i8042_enable_kbd_port(void)
35 {
36 if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) {
37 pr_err("i8042.c: Can't read CTR while enabling i8042 kbd port."
38 "\n");
39 return -EIO;
40 }
41
42 i8042_ctr &= ~I8042_CTR_KBDDIS;
43 i8042_ctr |= I8042_CTR_KBDINT;
44
45 if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
46 i8042_ctr &= ~I8042_CTR_KBDINT;
47 i8042_ctr |= I8042_CTR_KBDDIS;
48 pr_err("i8042.c: Failed to enable KBD port.\n");
49
50 return -EIO;
51 }
52
53 return 0;
54 }
55
setup_wakeup_events(void)56 void setup_wakeup_events(void)
57 {
58 int irq_mask;
59
60 switch (mips_machtype) {
61 case MACH_LEMOTE_ML2F7:
62 case MACH_LEMOTE_YL2F89:
63 /* open the keyboard irq in i8259A */
64 outb((0xff & ~(1 << I8042_KBD_IRQ)), PIC_MASTER_IMR);
65 irq_mask = inb(PIC_MASTER_IMR);
66
67 /* enable keyboard port */
68 i8042_enable_kbd_port();
69
70 /* Wakeup CPU via SCI lid open event */
71 outb(irq_mask & ~(1 << PIC_CASCADE_IR), PIC_MASTER_IMR);
72 inb(PIC_MASTER_IMR);
73 outb(0xff & ~(1 << (SCI_IRQ_NUM - 8)), PIC_SLAVE_IMR);
74 inb(PIC_SLAVE_IMR);
75
76 break;
77
78 default:
79 break;
80 }
81 }
82
83 static struct delayed_work lid_task;
84 static int initialized;
85 /* yeeloong_report_lid_status will be implemented in yeeloong_laptop.c */
86 sci_handler yeeloong_report_lid_status;
87 EXPORT_SYMBOL(yeeloong_report_lid_status);
yeeloong_lid_update_task(struct work_struct * work)88 static void yeeloong_lid_update_task(struct work_struct *work)
89 {
90 if (yeeloong_report_lid_status)
91 yeeloong_report_lid_status(BIT_LID_DETECT_ON);
92 }
93
wakeup_loongson(void)94 int wakeup_loongson(void)
95 {
96 int irq;
97
98 /* query the interrupt number */
99 irq = mach_i8259_irq();
100 if (irq < 0)
101 return 0;
102
103 printk(KERN_INFO "%s: irq = %d\n", __func__, irq);
104
105 if (irq == I8042_KBD_IRQ)
106 return 1;
107 else if (irq == SCI_IRQ_NUM) {
108 int ret, sci_event;
109 /* query the event number */
110 ret = ec_query_seq(CMD_GET_EVENT_NUM);
111 if (ret < 0)
112 return 0;
113 sci_event = ec_get_event_num();
114 if (sci_event < 0)
115 return 0;
116 if (sci_event == EVENT_LID) {
117 int lid_status;
118 /* check the LID status */
119 lid_status = ec_read(REG_LID_DETECT);
120 /* wakeup cpu when people open the LID */
121 if (lid_status == BIT_LID_DETECT_ON) {
122 /* If we call it directly here, the WARNING
123 * will be sent out by getnstimeofday
124 * via "WARN_ON(timekeeping_suspended);"
125 * because we can not schedule in suspend mode.
126 */
127 if (initialized == 0) {
128 INIT_DELAYED_WORK(&lid_task,
129 yeeloong_lid_update_task);
130 initialized = 1;
131 }
132 schedule_delayed_work(&lid_task, 1);
133 return 1;
134 }
135 }
136 }
137
138 return 0;
139 }
140
mach_suspend(void)141 void __weak mach_suspend(void)
142 {
143 disable_mfgpt0_counter();
144 }
145
mach_resume(void)146 void __weak mach_resume(void)
147 {
148 enable_mfgpt0_counter();
149 }
150
