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a9e8641f WZ |
1 | /* |
2 | * Lemote loongson2f family machines' specific suspend support | |
3 | * | |
4 | * Copyright (C) 2009 Lemote Inc. | |
5 | * Author: Wu Zhangjin <wuzj@lemote.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> | |
cb1ed9e1 | 17 | #include <linux/module.h> |
a9e8641f WZ |
18 | |
19 | #include <asm/i8259.h> | |
20 | #include <asm/mipsregs.h> | |
21 | #include <asm/bootinfo.h> | |
22 | ||
23 | #include <loongson.h> | |
24 | ||
c47a48d8 | 25 | #include <cs5536/cs5536_mfgpt.h> |
cb1ed9e1 WZ |
26 | #include "ec_kb3310b.h" |
27 | ||
a9e8641f WZ |
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 | ||
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 | ||
a9e8641f WZ |
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(); | |
cb1ed9e1 WZ |
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 | ||
a9e8641f WZ |
76 | break; |
77 | ||
78 | default: | |
79 | break; | |
80 | } | |
81 | } | |
cb1ed9e1 WZ |
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); | |
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 | ||
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 | } | |
c47a48d8 WZ |
140 | |
141 | void __weak mach_suspend(void) | |
142 | { | |
143 | disable_mfgpt0_counter(); | |
144 | } | |
145 | ||
146 | void __weak mach_resume(void) | |
147 | { | |
148 | enable_mfgpt0_counter(); | |
149 | } |