Wu Zhangjin | a9e8641 | 2009-11-11 14:57:41 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Lemote loongson2f family machines' specific suspend support |
| 3 | * |
| 4 | * Copyright (C) 2009 Lemote Inc. |
Wu Zhangjin | f7a904d | 2010-01-04 17:16:51 +0800 | [diff] [blame] | 5 | * Author: Wu Zhangjin <wuzhangjin@gmail.com> |
Wu Zhangjin | a9e8641 | 2009-11-11 14:57:41 +0800 | [diff] [blame] | 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> |
Wu Zhangjin | cb1ed9e | 2009-11-21 19:05:24 +0800 | [diff] [blame] | 17 | #include <linux/module.h> |
Wu Zhangjin | a9e8641 | 2009-11-11 14:57:41 +0800 | [diff] [blame] | 18 | |
| 19 | #include <asm/i8259.h> |
| 20 | #include <asm/mipsregs.h> |
| 21 | #include <asm/bootinfo.h> |
| 22 | |
| 23 | #include <loongson.h> |
| 24 | |
Wu Zhangjin | c47a48d | 2009-11-24 21:48:36 +0800 | [diff] [blame] | 25 | #include <cs5536/cs5536_mfgpt.h> |
Wu Zhangjin | cb1ed9e | 2009-11-21 19:05:24 +0800 | [diff] [blame] | 26 | #include "ec_kb3310b.h" |
| 27 | |
Wu Zhangjin | a9e8641 | 2009-11-11 14:57:41 +0800 | [diff] [blame] | 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 | |
Wu Zhangjin | a9e8641 | 2009-11-11 14:57:41 +0800 | [diff] [blame] | 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(); |
Wu Zhangjin | cb1ed9e | 2009-11-21 19:05:24 +0800 | [diff] [blame] | 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 | |
Wu Zhangjin | a9e8641 | 2009-11-11 14:57:41 +0800 | [diff] [blame] | 76 | break; |
| 77 | |
| 78 | default: |
| 79 | break; |
| 80 | } |
| 81 | } |
Wu Zhangjin | cb1ed9e | 2009-11-21 19:05:24 +0800 | [diff] [blame] | 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 | } |
Wu Zhangjin | c47a48d | 2009-11-24 21:48:36 +0800 | [diff] [blame] | 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 | } |