projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a9e8641f WZ |
1 | /* |
| 2 | * Lemote loongson2f family machines' specific suspend support | |
| 3 | * | |
| 4 | * Copyright (C) 2009 Lemote Inc. | |
| f7a904df | 5 | * Author: Wu Zhangjin <wuzhangjin@gmail.com> |
| a9e8641f WZ |
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 | } |