1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Lemote loongson2f family machines' specific suspend support |
4 | * |
5 | * Copyright (C) 2009 Lemote Inc. |
6 | * Author: Wu Zhangjin <wuzhangjin@gmail.com> |
7 | */ |
8 | |
9 | #include <linux/suspend.h> |
10 | #include <linux/interrupt.h> |
11 | #include <linux/pm.h> |
12 | #include <linux/i8042.h> |
13 | #include <linux/export.h> |
14 | |
15 | #include <asm/i8259.h> |
16 | #include <asm/mipsregs.h> |
17 | #include <asm/bootinfo.h> |
18 | |
19 | #include <loongson.h> |
20 | |
21 | #include <cs5536/cs5536_mfgpt.h> |
22 | #include "ec_kb3310b.h" |
23 | |
24 | #define I8042_KBD_IRQ 1 |
25 | #define I8042_CTR_KBDINT 0x01 |
26 | #define I8042_CTR_KBDDIS 0x10 |
27 | |
28 | static unsigned char i8042_ctr; |
29 | |
30 | static int i8042_enable_kbd_port(void) |
31 | { |
32 | if (i8042_command(param: &i8042_ctr, I8042_CMD_CTL_RCTR)) { |
33 | pr_err("i8042.c: Can't read CTR while enabling i8042 kbd port." |
34 | "\n" ); |
35 | return -EIO; |
36 | } |
37 | |
38 | i8042_ctr &= ~I8042_CTR_KBDDIS; |
39 | i8042_ctr |= I8042_CTR_KBDINT; |
40 | |
41 | if (i8042_command(param: &i8042_ctr, I8042_CMD_CTL_WCTR)) { |
42 | i8042_ctr &= ~I8042_CTR_KBDINT; |
43 | i8042_ctr |= I8042_CTR_KBDDIS; |
44 | pr_err("i8042.c: Failed to enable KBD port.\n" ); |
45 | |
46 | return -EIO; |
47 | } |
48 | |
49 | return 0; |
50 | } |
51 | |
52 | void setup_wakeup_events(void) |
53 | { |
54 | int irq_mask; |
55 | |
56 | switch (mips_machtype) { |
57 | case MACH_LEMOTE_ML2F7: |
58 | case MACH_LEMOTE_YL2F89: |
59 | /* open the keyboard irq in i8259A */ |
60 | outb(value: (0xff & ~(1 << I8042_KBD_IRQ)), PIC_MASTER_IMR); |
61 | irq_mask = inb(PIC_MASTER_IMR); |
62 | |
63 | /* enable keyboard port */ |
64 | i8042_enable_kbd_port(); |
65 | |
66 | /* Wakeup CPU via SCI lid open event */ |
67 | outb(value: irq_mask & ~(1 << PIC_CASCADE_IR), PIC_MASTER_IMR); |
68 | inb(PIC_MASTER_IMR); |
69 | outb(value: 0xff & ~(1 << (SCI_IRQ_NUM - 8)), PIC_SLAVE_IMR); |
70 | inb(PIC_SLAVE_IMR); |
71 | |
72 | break; |
73 | |
74 | default: |
75 | break; |
76 | } |
77 | } |
78 | |
79 | static struct delayed_work lid_task; |
80 | static int initialized; |
81 | /* yeeloong_report_lid_status will be implemented in yeeloong_laptop.c */ |
82 | sci_handler yeeloong_report_lid_status; |
83 | EXPORT_SYMBOL(yeeloong_report_lid_status); |
84 | static void yeeloong_lid_update_task(struct work_struct *work) |
85 | { |
86 | if (yeeloong_report_lid_status) |
87 | yeeloong_report_lid_status(BIT_LID_DETECT_ON); |
88 | } |
89 | |
90 | int wakeup_loongson(void) |
91 | { |
92 | int irq; |
93 | |
94 | /* query the interrupt number */ |
95 | irq = mach_i8259_irq(); |
96 | if (irq < 0) |
97 | return 0; |
98 | |
99 | printk(KERN_INFO "%s: irq = %d\n" , __func__, irq); |
100 | |
101 | if (irq == I8042_KBD_IRQ) |
102 | return 1; |
103 | else if (irq == SCI_IRQ_NUM) { |
104 | int ret, sci_event; |
105 | /* query the event number */ |
106 | ret = ec_query_seq(CMD_GET_EVENT_NUM); |
107 | if (ret < 0) |
108 | return 0; |
109 | sci_event = ec_get_event_num(); |
110 | if (sci_event < 0) |
111 | return 0; |
112 | if (sci_event == EVENT_LID) { |
113 | int lid_status; |
114 | /* check the LID status */ |
115 | lid_status = ec_read(REG_LID_DETECT); |
116 | /* wakeup cpu when people open the LID */ |
117 | if (lid_status == BIT_LID_DETECT_ON) { |
118 | /* If we call it directly here, the WARNING |
119 | * will be sent out by getnstimeofday |
120 | * via "WARN_ON(timekeeping_suspended);" |
121 | * because we can not schedule in suspend mode. |
122 | */ |
123 | if (initialized == 0) { |
124 | INIT_DELAYED_WORK(&lid_task, |
125 | yeeloong_lid_update_task); |
126 | initialized = 1; |
127 | } |
128 | schedule_delayed_work(dwork: &lid_task, delay: 1); |
129 | return 1; |
130 | } |
131 | } |
132 | } |
133 | |
134 | return 0; |
135 | } |
136 | |
137 | void __weak mach_suspend(void) |
138 | { |
139 | disable_mfgpt0_counter(); |
140 | } |
141 | |
142 | void __weak mach_resume(void) |
143 | { |
144 | enable_mfgpt0_counter(); |
145 | } |
146 | |