Merge branch 'remote_wakeup'

1 files changed, 124 insertions, 4 deletions

diff --git a/protocol/lufa/lufa.c b/protocol/lufa/lufa.c
index 98c3a68ffb..127dece547 100644
--- a/protocol/lufa/lufa.c
+++ b/protocol/lufa/lufa.c
@@ -36,12 +36,20 @@
   this software.
 */
 
+#include <avr/sleep.h>
+#include <avr/wdt.h>
 #include "report.h"
 #include "host.h"
 #include "host_driver.h"
 #include "keyboard.h"
+#include "action.h"
+#include "matrix.h"
+#include "led.h"
 #include "sendchar.h"
 #include "debug.h"
+#ifdef SLEEP_LED_ENABLE
+#include "sleep_led.h"
+#endif
 
 #include "descriptor.h"
 #include "lufa.h"
@@ -133,16 +141,45 @@ static void Console_Task(void)
 /*******************************************************************************
  * USB Events
  ******************************************************************************/
-/** Event handler for the USB_Connect event. */
+/*
+ * Event Order of Plug in:
+ * 0) EVENT_USB_Device_Connect
+ * 1) EVENT_USB_Device_Suspend
+ * 2) EVENT_USB_Device_Reset
+ * 3) EVENT_USB_Device_Wake
+*/
 void EVENT_USB_Device_Connect(void)
 {
+    led_set(0x1f);  // all on
 }
 
-/** Event handler for the USB_Disconnect event. */
 void EVENT_USB_Device_Disconnect(void)
 {
 }
 
+void EVENT_USB_Device_Reset(void)
+{
+}
+
+void EVENT_USB_Device_Suspend()
+{
+#ifdef SLEEP_LED_ENABLE
+    sleep_led_enable();
+#endif
+}
+
+void EVENT_USB_Device_WakeUp()
+{
+    // initialize
+    matrix_init();
+    clear_keyboard();
+
+#ifdef SLEEP_LED_ENABLE
+    sleep_led_disable();
+#endif
+    led_set(host_keyboard_leds());
+}
+
 void EVENT_USB_Device_StartOfFrame(void)
 {
     Console_Task();
@@ -466,17 +503,83 @@ static void SetupHardware(void)
     USB_Device_EnableSOFEvents();
 }
 
+
+static bool wakeup_condition(void)
+{
+    matrix_scan();
+    for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
+        if (matrix_get_row(r)) return true;
+    }
+    return false;
+}
+
+#define wdt_intr_enable(value)   \
+__asm__ __volatile__ (  \
+    "in __tmp_reg__,__SREG__" "\n\t"    \
+    "cli" "\n\t"    \
+    "wdr" "\n\t"    \
+    "sts %0,%1" "\n\t"  \
+    "out __SREG__,__tmp_reg__" "\n\t"   \
+    "sts %0,%2" "\n\t" \
+    : /* no outputs */  \
+    : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
+    "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
+    "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
+        _BV(WDIE) | (value & 0x07)) ) \
+    : "r0"  \
+)
+
 int main(void)  __attribute__ ((weak));
 int main(void)
 {
     SetupHardware();
     keyboard_init();
     host_set_driver(&lufa_driver);
+#ifdef SLEEP_LED_ENABLE
+    sleep_led_init();
+#endif
     sei();
 
-    // TODO: can't print here
-    debug("LUFA init\n");
     while (1) {
+        // while suspend
+        while (USB_DeviceState == DEVICE_STATE_Suspended) {
+#ifndef NO_SUSPEND_POWER_DOWN
+            // Enable watchdog to wake from MCU sleep
+            cli();
+            wdt_reset();
+
+            // Watchdog Interrupt and System Reset Mode
+            //wdt_enable(WDTO_1S);
+            //WDTCSR |= _BV(WDIE);
+            
+            // Watchdog Interrupt Mode
+            wdt_intr_enable(WDTO_120MS);
+            
+            // TODO: more power saving
+            // See PicoPower application note
+            // - I/O port input with pullup
+            // - prescale clock
+            // - BOD disable
+            // - Power Reduction Register PRR
+            // sleep in power down mode
+            set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+            sleep_enable();
+            sei();
+            sleep_cpu();
+            sleep_disable();
+
+            // Disable watchdog after sleep
+            wdt_disable();
+#endif
+
+            // Send request of USB Wakeup from Suspend to host
+            if (USB_Device_RemoteWakeupEnabled) {
+                if (wakeup_condition()) {
+                    USB_Device_SendRemoteWakeup();
+                }
+            }
+        }
+
         keyboard_task();
 
 #if !defined(INTERRUPT_CONTROL_ENDPOINT)
@@ -484,3 +587,20 @@ int main(void)
 #endif
     }
 }
+
+#ifndef NO_SUSPEND_POWER_DOWN
+/* watchdog timeout */
+ISR(WDT_vect)
+{
+    /* wakeup from MCU sleep mode */
+/*
+    // blink LED
+    static uint8_t led_state = 0;
+    static uint8_t led_count = 0;
+    led_count++;
+    if ((led_count & 0x07) == 0) {
+        led_set((led_state ^= (1<<USB_LED_CAPS_LOCK)));
+    }
+*/
+}
+#endif