MIPS: Yeeloong 2F: Add LID open event as the wakeup event

[mv-sheeva.git] / arch / mips / loongson / lemote-2f / pm.c

diff --git a/arch/mips/loongson/lemote-2f/pm.c b/arch/mips/loongson/lemote-2f/pm.c
index 8090d05142214d3ab5a198dc0121fc7cf5bd05b6..81c06410aa76fd1ed8237228c42428c768262f6f 100644 (file)
--- a/arch/mips/loongson/lemote-2f/pm.c
+++ b/arch/mips/loongson/lemote-2f/pm.c
@@ -14,6 +14,7 @@
 #include <linux/interrupt.h>
 #include <linux/pm.h>
 #include <linux/i8042.h>
+#include <linux/module.h>
 
 #include <asm/i8259.h>
 #include <asm/mipsregs.h>
@@ -21,6 +22,8 @@
 
 #include <loongson.h>
 
+#include "ec_kb3310b.h"
+
 #define I8042_KBD_IRQ          1
 #define I8042_CTR_KBDINT       0x01
 #define I8042_CTR_KBDDIS       0x10
@@ -49,9 +52,6 @@ static int i8042_enable_kbd_port(void)
        return 0;
 }
 
-/*
- * The i8042 is connnected to i8259A
- */
 void setup_wakeup_events(void)
 {
        int irq_mask;
@@ -65,9 +65,74 @@ void setup_wakeup_events(void)
 
                /* 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;
+}