1 files changed, 149 insertions, 0 deletions

diff --git a/arch/mips/loongson/lemote-2f/pm.c b/arch/mips/loongson/lemote-2f/pm.c
new file mode 100644
index 000000000000..d7af2e616592
--- /dev/null
+++ b/arch/mips/loongson/lemote-2f/pm.c
@@ -0,0 +1,149 @@
+/*
+ *  Lemote loongson2f family machines' specific suspend support
+ *
+ *  Copyright (C) 2009 Lemote Inc.
+ *  Author: Wu Zhangjin <wuzj@lemote.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/suspend.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/i8042.h>
+#include <linux/module.h>
+
+#include <asm/i8259.h>
+#include <asm/mipsregs.h>
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+#include <cs5536/cs5536_mfgpt.h>
+#include "ec_kb3310b.h"
+
+#define I8042_KBD_IRQ           1
+#define I8042_CTR_KBDINT        0x01
+#define I8042_CTR_KBDDIS        0x10
+
+static unsigned char i8042_ctr;
+
+static int i8042_enable_kbd_port(void)
+{
+        if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) {
+                pr_err("i8042.c: Can't read CTR while enabling i8042 kbd port."
+                       "\n");
+                return -EIO;
+        }
+
+        i8042_ctr &= ~I8042_CTR_KBDDIS;
+        i8042_ctr |= I8042_CTR_KBDINT;
+
+        if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
+                i8042_ctr &= ~I8042_CTR_KBDINT;
+                i8042_ctr |= I8042_CTR_KBDDIS;
+                pr_err("i8042.c: Failed to enable KBD port.\n");
+
+                return -EIO;
+        }
+
+        return 0;
+}
+
+void setup_wakeup_events(void)
+{
+        int irq_mask;
+
+        switch (mips_machtype) {
+        case MACH_LEMOTE_ML2F7:
+        case MACH_LEMOTE_YL2F89:
+                /* open the keyboard irq in i8259A */
+                outb((0xff & ~(1 << I8042_KBD_IRQ)), PIC_MASTER_IMR);
+                irq_mask = inb(PIC_MASTER_IMR);
+
+                /* enable keyboard port */
+                i8042_enable_kbd_port();
+
+                /* Wakeup CPU via SCI lid open event */
+                outb(irq_mask & ~(1 << PIC_CASCADE_IR), PIC_MASTER_IMR);
+                inb(PIC_MASTER_IMR);
+                outb(0xff & ~(1 << (SCI_IRQ_NUM - 8)), PIC_SLAVE_IMR);
+                inb(PIC_SLAVE_IMR);
+
+                break;
+
+        default:
+                break;
+        }
+}
+
+static struct delayed_work lid_task;
+static int initialized;
+/* yeeloong_report_lid_status will be implemented in yeeloong_laptop.c */
+sci_handler yeeloong_report_lid_status;
+EXPORT_SYMBOL(yeeloong_report_lid_status);
+static void yeeloong_lid_update_task(struct work_struct *work)
+{
+        if (yeeloong_report_lid_status)
+                yeeloong_report_lid_status(BIT_LID_DETECT_ON);
+}
+
+int wakeup_loongson(void)
+{
+        int irq;
+
+        /* query the interrupt number */
+        irq = mach_i8259_irq();
+        if (irq < 0)
+                return 0;
+
+        printk(KERN_INFO "%s: irq = %d\n", __func__, irq);
+
+        if (irq == I8042_KBD_IRQ)
+                return 1;
+        else if (irq == SCI_IRQ_NUM) {
+                int ret, sci_event;
+                /* query the event number */
+                ret = ec_query_seq(CMD_GET_EVENT_NUM);
+                if (ret < 0)
+                        return 0;
+                sci_event = ec_get_event_num();
+                if (sci_event < 0)
+                        return 0;
+                if (sci_event == EVENT_LID) {
+                        int lid_status;
+                        /* check the LID status */
+                        lid_status = ec_read(REG_LID_DETECT);
+                        /* wakeup cpu when people open the LID */
+                        if (lid_status == BIT_LID_DETECT_ON) {
+                                /* If we call it directly here, the WARNING
+                                 * will be sent out by getnstimeofday
+                                 * via "WARN_ON(timekeeping_suspended);"
+                                 * because we can not schedule in suspend mode.
+                                 */
+                                if (initialized == 0) {
+                                        INIT_DELAYED_WORK(&lid_task,
+                                                yeeloong_lid_update_task);
+                                        initialized = 1;
+                                }
+                                schedule_delayed_work(&lid_task, 1);
+                                return 1;
+                        }
+                }
+        }
+
+        return 0;
+}
+
+void __weak mach_suspend(void)
+{
+        disable_mfgpt0_counter();
+}
+
+void __weak mach_resume(void)
+{
+        enable_mfgpt0_counter();
+}