diff --git a/LICENSE.txt b/LICENSE.txt
deleted file mode 100644
index de622df..0000000
--- a/LICENSE.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-Codes are released under each license. See heading of each file for details.
-
-Modified BSD license:
-    ps2.c
-    ps2.h
-    adb.c
-    adb.h
-
-GPLv2 or later:
-    other codes
-
-PJRC's license:
-    print.c
-    print.h
-    pjrc/
-
-GPLv2 or GPLv3 or OBJECTIVE DEVELOPMENT's commercial license:
-    vusb/
-
-
-
-
-This software includes following codes from other parties.
-    - V-USB from OBJECTIVE DEVELOPMENT
-        http://www.obdev.at/products/vusb/index.html
-    - Teensy example codes from PJRC
-        http://www.pjrc.com/teensy/
diff --git a/bootloader.c b/common/bootloader.c
similarity index 100%
rename from bootloader.c
rename to common/bootloader.c
diff --git a/bootloader.h b/common/bootloader.h
similarity index 100%
rename from bootloader.h
rename to common/bootloader.h
diff --git a/command.c b/common/command.c
similarity index 100%
rename from command.c
rename to common/command.c
diff --git a/command.h b/common/command.h
similarity index 100%
rename from command.h
rename to common/command.h
diff --git a/controller_teensy.h b/common/controller_teensy.h
similarity index 100%
rename from controller_teensy.h
rename to common/controller_teensy.h
diff --git a/debug.h b/common/debug.h
similarity index 100%
rename from debug.h
rename to common/debug.h
diff --git a/host.c b/common/host.c
similarity index 100%
rename from host.c
rename to common/host.c
diff --git a/host.h b/common/host.h
similarity index 100%
rename from host.h
rename to common/host.h
diff --git a/host_driver.h b/common/host_driver.h
similarity index 100%
rename from host_driver.h
rename to common/host_driver.h
diff --git a/keyboard.c b/common/keyboard.c
similarity index 100%
rename from keyboard.c
rename to common/keyboard.c
diff --git a/keyboard.h b/common/keyboard.h
similarity index 100%
rename from keyboard.h
rename to common/keyboard.h
diff --git a/keymap.h b/common/keymap.h
similarity index 100%
rename from keymap.h
rename to common/keymap.h
diff --git a/layer.c b/common/layer.c
similarity index 100%
rename from layer.c
rename to common/layer.c
diff --git a/layer.h b/common/layer.h
similarity index 100%
rename from layer.h
rename to common/layer.h
diff --git a/led.h b/common/led.h
similarity index 100%
rename from led.h
rename to common/led.h
diff --git a/matrix.h b/common/matrix.h
similarity index 100%
rename from matrix.h
rename to common/matrix.h
diff --git a/mousekey.c b/common/mousekey.c
similarity index 100%
rename from mousekey.c
rename to common/mousekey.c
diff --git a/mousekey.h b/common/mousekey.h
similarity index 100%
rename from mousekey.h
rename to common/mousekey.h
diff --git a/print.c b/common/print.c
similarity index 100%
rename from print.c
rename to common/print.c
diff --git a/print.h b/common/print.h
similarity index 100%
rename from print.h
rename to common/print.h
diff --git a/report.h b/common/report.h
similarity index 100%
rename from report.h
rename to common/report.h
diff --git a/sendchar.h b/common/sendchar.h
similarity index 100%
rename from sendchar.h
rename to common/sendchar.h
diff --git a/sendchar_null.c b/common/sendchar_null.c
similarity index 100%
rename from sendchar_null.c
rename to common/sendchar_null.c
diff --git a/sendchar_uart.c b/common/sendchar_uart.c
similarity index 100%
rename from sendchar_uart.c
rename to common/sendchar_uart.c
diff --git a/timer.c b/common/timer.c
similarity index 100%
rename from timer.c
rename to common/timer.c
diff --git a/timer.h b/common/timer.h
similarity index 100%
rename from timer.h
rename to common/timer.h
diff --git a/uart.c b/common/uart.c
similarity index 100%
rename from uart.c
rename to common/uart.c
diff --git a/uart.h b/common/uart.h
similarity index 100%
rename from uart.h
rename to common/uart.h
diff --git a/usb_keycodes.h b/common/usb_keycodes.h
similarity index 100%
rename from usb_keycodes.h
rename to common/usb_keycodes.h
diff --git a/util.c b/common/util.c
similarity index 100%
rename from util.c
rename to common/util.c
diff --git a/util.h b/common/util.h
similarity index 100%
rename from util.h
rename to common/util.h
diff --git a/COPYING.GPLv2 b/doc/COPYING.GPLv2
similarity index 100%
rename from COPYING.GPLv2
rename to doc/COPYING.GPLv2
diff --git a/COPYING.GPLv3 b/doc/COPYING.GPLv3
similarity index 100%
rename from COPYING.GPLv3
rename to doc/COPYING.GPLv3
diff --git a/hhkb/FUSE.txt b/doc/FUSE.txt
similarity index 100%
rename from hhkb/FUSE.txt
rename to doc/FUSE.txt
diff --git a/POWER.txt b/doc/POWER.txt
similarity index 100%
rename from POWER.txt
rename to doc/POWER.txt
diff --git a/USB_NKRO.txt b/doc/USB_NKRO.txt
similarity index 100%
rename from USB_NKRO.txt
rename to doc/USB_NKRO.txt
diff --git a/pjrc/host.c b/pjrc/host.c
deleted file mode 100644
index fcf71d5..0000000
--- a/pjrc/host.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
-Copyright 2011 Jun Wako <wakojun@gmail.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.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <stdint.h>
-#include <avr/interrupt.h>
-#include "usb_keycodes.h"
-#include "usb_keyboard.h"
-#if defined(MOUSEKEY_ENABLE) || defined(PS2_MOUSE_ENABLE)
-#include "usb_mouse.h"
-#endif
-#ifdef EXTRAKEY_ENABLE
-#include "usb_extra.h"
-#endif
-#include "debug.h"
-#include "host.h"
-#include "util.h"
-
-
-#ifdef NKRO_ENABLE
-bool keyboard_nkro = false;
-#endif
-
-static report_keyboard_t report0;
-static report_keyboard_t report1;
-report_keyboard_t *keyboard_report = &report0;
-report_keyboard_t *keyboard_report_prev = &report1;
-
-static inline void add_key_byte(uint8_t code);
-static inline void add_key_bit(uint8_t code);
-
-
-uint8_t host_keyboard_leds(void)
-{
-    return usb_keyboard_leds;
-}
-
-/* keyboard report operations */
-void host_add_key(uint8_t key)
-{
-#ifdef NKRO_ENABLE
-    if (keyboard_nkro) {
-        add_key_bit(key);
-        return;
-    }
-#endif
-    add_key_byte(key);
-}
-
-void host_add_mod_bit(uint8_t mod)
-{
-    keyboard_report->mods |= mod;
-}
-
-void host_set_mods(uint8_t mods)
-{
-    keyboard_report->mods = mods;
-}
-
-void host_add_code(uint8_t code)
-{
-    if (IS_MOD(code)) {
-        host_add_mod_bit(MOD_BIT(code));
-    } else {
-        host_add_key(code);
-    }
-}
-
-void host_swap_keyboard_report(void)
-{
-    uint8_t sreg = SREG;
-    cli();
-    report_keyboard_t *tmp = keyboard_report_prev;
-    keyboard_report_prev = keyboard_report;
-    keyboard_report = tmp;
-    SREG = sreg;
-}
-
-void host_clear_keyboard_report(void)
-{
-    keyboard_report->mods = 0;
-    for (int8_t i = 0; i < REPORT_KEYS; i++) {
-        keyboard_report->keys[i] = 0;
-    }
-}
-
-uint8_t host_has_anykey(void)
-{
-    uint8_t cnt = 0;
-    for (int i = 0; i < REPORT_KEYS; i++) {
-        if (keyboard_report->keys[i])
-            cnt++;
-    }
-    return cnt;
-}
-
-uint8_t host_get_first_key(void)
-{
-#ifdef NKRO_ENABLE
-    if (keyboard_nkro) {
-        uint8_t i = 0;
-        for (; i < REPORT_KEYS && !keyboard_report->keys[i]; i++)
-            ;
-        return i<<3 | biton(keyboard_report->keys[i]);
-    }
-#endif
-    return keyboard_report->keys[0];
-}
-
-
-void host_send_keyboard_report(void)
-{
-    usb_keyboard_send_report(keyboard_report);
-}
-
-#if defined(MOUSEKEY_ENABLE) || defined(PS2_MOUSE_ENABLE)
-void host_mouse_send(report_mouse_t *report)
-{
-    usb_mouse_send(report->x, report->y, report->v, report->h, report->buttons);
-}
-#endif
-
-#ifdef EXTRAKEY_ENABLE
-void host_system_send(uint16_t data)
-{
-    usb_extra_system_send(data);
-}
-
-void host_consumer_send(uint16_t data)
-{
-    static uint16_t last_data = 0;
-    if (data == last_data) return;
-    last_data = data;
-
-    usb_extra_consumer_send(data);
-}
-#endif
-
-
-static inline void add_key_byte(uint8_t code)
-{
-    // TODO: fix ugly code
-    int8_t i = 0;
-    int8_t empty = -1;
-    for (; i < REPORT_KEYS; i++) {
-        if (keyboard_report_prev->keys[i] == code) {
-            keyboard_report->keys[i] = code;
-            break;
-        }
-        if (empty == -1 &&
-                keyboard_report_prev->keys[i] == 0 &&
-                keyboard_report->keys[i] == 0) {
-            empty = i;
-        }
-    }
-    if (i == REPORT_KEYS) {
-        if (empty != -1) {
-            keyboard_report->keys[empty] = code;
-        }
-    }
-}
-
-static inline void add_key_bit(uint8_t code)
-{
-    if ((code>>3) < REPORT_KEYS) {
-        keyboard_report->keys[code>>3] |= 1<<(code&7);
-    } else {
-        debug("add_key_bit: can't add: "); phex(code); debug("\n");
-    }
-}
diff --git a/adb.c b/protocol/adb.c
similarity index 100%
rename from adb.c
rename to protocol/adb.c
diff --git a/adb.h b/protocol/adb.h
similarity index 100%
rename from adb.h
rename to protocol/adb.h
diff --git a/iwrap.mk b/protocol/iwrap.mk
similarity index 100%
rename from iwrap.mk
rename to protocol/iwrap.mk
diff --git a/iwrap/iWRAP.txt b/protocol/iwrap/iWRAP.txt
similarity index 100%
rename from iwrap/iWRAP.txt
rename to protocol/iwrap/iWRAP.txt
diff --git a/iwrap/iwrap.c b/protocol/iwrap/iwrap.c
similarity index 100%
rename from iwrap/iwrap.c
rename to protocol/iwrap/iwrap.c
diff --git a/iwrap/iwrap.h b/protocol/iwrap/iwrap.h
similarity index 100%
rename from iwrap/iwrap.h
rename to protocol/iwrap/iwrap.h
diff --git a/iwrap/main.c b/protocol/iwrap/main.c
similarity index 100%
rename from iwrap/main.c
rename to protocol/iwrap/main.c
diff --git a/iwrap/suart.S b/protocol/iwrap/suart.S
similarity index 100%
rename from iwrap/suart.S
rename to protocol/iwrap/suart.S
diff --git a/iwrap/suart.h b/protocol/iwrap/suart.h
similarity index 100%
rename from iwrap/suart.h
rename to protocol/iwrap/suart.h
diff --git a/iwrap/wd.h b/protocol/iwrap/wd.h
similarity index 100%
rename from iwrap/wd.h
rename to protocol/iwrap/wd.h
diff --git a/m0110.c b/protocol/m0110.c
similarity index 100%
rename from m0110.c
rename to protocol/m0110.c
diff --git a/m0110.h b/protocol/m0110.h
similarity index 100%
rename from m0110.h
rename to protocol/m0110.h
diff --git a/pjrc.mk b/protocol/pjrc.mk
similarity index 100%
rename from pjrc.mk
rename to protocol/pjrc.mk
diff --git a/pjrc/bootloader_teensy.c b/protocol/pjrc/bootloader_teensy.c
similarity index 100%
rename from pjrc/bootloader_teensy.c
rename to protocol/pjrc/bootloader_teensy.c
diff --git a/pjrc/main.c b/protocol/pjrc/main.c
similarity index 100%
rename from pjrc/main.c
rename to protocol/pjrc/main.c
diff --git a/pjrc/pjrc.c b/protocol/pjrc/pjrc.c
similarity index 100%
rename from pjrc/pjrc.c
rename to protocol/pjrc/pjrc.c
diff --git a/pjrc/pjrc.h b/protocol/pjrc/pjrc.h
similarity index 100%
rename from pjrc/pjrc.h
rename to protocol/pjrc/pjrc.h
diff --git a/pjrc/usb.c b/protocol/pjrc/usb.c
similarity index 100%
rename from pjrc/usb.c
rename to protocol/pjrc/usb.c
diff --git a/pjrc/usb.h b/protocol/pjrc/usb.h
similarity index 100%
rename from pjrc/usb.h
rename to protocol/pjrc/usb.h
diff --git a/pjrc/usb_debug.c b/protocol/pjrc/usb_debug.c
similarity index 100%
rename from pjrc/usb_debug.c
rename to protocol/pjrc/usb_debug.c
diff --git a/pjrc/usb_debug.h b/protocol/pjrc/usb_debug.h
similarity index 100%
rename from pjrc/usb_debug.h
rename to protocol/pjrc/usb_debug.h
diff --git a/pjrc/usb_extra.c b/protocol/pjrc/usb_extra.c
similarity index 100%
rename from pjrc/usb_extra.c
rename to protocol/pjrc/usb_extra.c
diff --git a/pjrc/usb_extra.h b/protocol/pjrc/usb_extra.h
similarity index 100%
rename from pjrc/usb_extra.h
rename to protocol/pjrc/usb_extra.h
diff --git a/pjrc/usb_keyboard.c b/protocol/pjrc/usb_keyboard.c
similarity index 100%
rename from pjrc/usb_keyboard.c
rename to protocol/pjrc/usb_keyboard.c
diff --git a/pjrc/usb_keyboard.h b/protocol/pjrc/usb_keyboard.h
similarity index 100%
rename from pjrc/usb_keyboard.h
rename to protocol/pjrc/usb_keyboard.h
diff --git a/pjrc/usb_mouse.c b/protocol/pjrc/usb_mouse.c
similarity index 100%
rename from pjrc/usb_mouse.c
rename to protocol/pjrc/usb_mouse.c
diff --git a/pjrc/usb_mouse.h b/protocol/pjrc/usb_mouse.h
similarity index 100%
rename from pjrc/usb_mouse.h
rename to protocol/pjrc/usb_mouse.h
diff --git a/ps2.c b/protocol/ps2.c
similarity index 100%
rename from ps2.c
rename to protocol/ps2.c
diff --git a/ps2.h b/protocol/ps2.h
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rename from ps2.h
rename to protocol/ps2.h
diff --git a/ps2_mouse.c b/protocol/ps2_mouse.c
similarity index 100%
rename from ps2_mouse.c
rename to protocol/ps2_mouse.c
diff --git a/ps2_mouse.h b/protocol/ps2_mouse.h
similarity index 100%
rename from ps2_mouse.h
rename to protocol/ps2_mouse.h
diff --git a/ps2_usart.c b/protocol/ps2_usart.c
similarity index 100%
rename from ps2_usart.c
rename to protocol/ps2_usart.c
diff --git a/vusb.mk b/protocol/vusb.mk
similarity index 100%
rename from vusb.mk
rename to protocol/vusb.mk
diff --git a/vusb/bootloader_usbasp.c b/protocol/vusb/bootloader_usbasp.c
similarity index 100%
rename from vusb/bootloader_usbasp.c
rename to protocol/vusb/bootloader_usbasp.c
diff --git a/vusb/main.c b/protocol/vusb/main.c
similarity index 100%
rename from vusb/main.c
rename to protocol/vusb/main.c
diff --git a/vusb/sendchar_usart.c b/protocol/vusb/sendchar_usart.c
similarity index 100%
rename from vusb/sendchar_usart.c
rename to protocol/vusb/sendchar_usart.c
diff --git a/vusb/usbdrv/Changelog.txt b/protocol/vusb/usbdrv/Changelog.txt
similarity index 100%
rename from vusb/usbdrv/Changelog.txt
rename to protocol/vusb/usbdrv/Changelog.txt
diff --git a/vusb/usbdrv/CommercialLicense.txt b/protocol/vusb/usbdrv/CommercialLicense.txt
similarity index 100%
rename from vusb/usbdrv/CommercialLicense.txt
rename to protocol/vusb/usbdrv/CommercialLicense.txt
diff --git a/vusb/usbdrv/License.txt b/protocol/vusb/usbdrv/License.txt
similarity index 100%
rename from vusb/usbdrv/License.txt
rename to protocol/vusb/usbdrv/License.txt
diff --git a/vusb/usbdrv/Readme.txt b/protocol/vusb/usbdrv/Readme.txt
similarity index 100%
rename from vusb/usbdrv/Readme.txt
rename to protocol/vusb/usbdrv/Readme.txt
diff --git a/vusb/usbdrv/USB-ID-FAQ.txt b/protocol/vusb/usbdrv/USB-ID-FAQ.txt
similarity index 100%
rename from vusb/usbdrv/USB-ID-FAQ.txt
rename to protocol/vusb/usbdrv/USB-ID-FAQ.txt
diff --git a/vusb/usbdrv/USB-IDs-for-free.txt b/protocol/vusb/usbdrv/USB-IDs-for-free.txt
similarity index 100%
rename from vusb/usbdrv/USB-IDs-for-free.txt
rename to protocol/vusb/usbdrv/USB-IDs-for-free.txt
diff --git a/vusb/usbdrv/asmcommon.inc b/protocol/vusb/usbdrv/asmcommon.inc
similarity index 100%
rename from vusb/usbdrv/asmcommon.inc
rename to protocol/vusb/usbdrv/asmcommon.inc
diff --git a/vusb/usbdrv/oddebug.c b/protocol/vusb/usbdrv/oddebug.c
similarity index 100%
rename from vusb/usbdrv/oddebug.c
rename to protocol/vusb/usbdrv/oddebug.c
diff --git a/vusb/usbdrv/oddebug.h b/protocol/vusb/usbdrv/oddebug.h
similarity index 100%
rename from vusb/usbdrv/oddebug.h
rename to protocol/vusb/usbdrv/oddebug.h
diff --git a/vusb/usbdrv/usbconfig-prototype.h b/protocol/vusb/usbdrv/usbconfig-prototype.h
similarity index 100%
rename from vusb/usbdrv/usbconfig-prototype.h
rename to protocol/vusb/usbdrv/usbconfig-prototype.h
diff --git a/vusb/usbdrv/usbdrv.c b/protocol/vusb/usbdrv/usbdrv.c
similarity index 100%
rename from vusb/usbdrv/usbdrv.c
rename to protocol/vusb/usbdrv/usbdrv.c
diff --git a/vusb/usbdrv/usbdrv.h b/protocol/vusb/usbdrv/usbdrv.h
similarity index 100%
rename from vusb/usbdrv/usbdrv.h
rename to protocol/vusb/usbdrv/usbdrv.h
diff --git a/vusb/usbdrv/usbdrvasm.S b/protocol/vusb/usbdrv/usbdrvasm.S
similarity index 100%
rename from vusb/usbdrv/usbdrvasm.S
rename to protocol/vusb/usbdrv/usbdrvasm.S
diff --git a/vusb/usbdrv/usbdrvasm.asm b/protocol/vusb/usbdrv/usbdrvasm.asm
similarity index 100%
rename from vusb/usbdrv/usbdrvasm.asm
rename to protocol/vusb/usbdrv/usbdrvasm.asm
diff --git a/vusb/usbdrv/usbdrvasm12.inc b/protocol/vusb/usbdrv/usbdrvasm12.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm12.inc
rename to protocol/vusb/usbdrv/usbdrvasm12.inc
diff --git a/vusb/usbdrv/usbdrvasm128.inc b/protocol/vusb/usbdrv/usbdrvasm128.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm128.inc
rename to protocol/vusb/usbdrv/usbdrvasm128.inc
diff --git a/vusb/usbdrv/usbdrvasm15.inc b/protocol/vusb/usbdrv/usbdrvasm15.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm15.inc
rename to protocol/vusb/usbdrv/usbdrvasm15.inc
diff --git a/vusb/usbdrv/usbdrvasm16.inc b/protocol/vusb/usbdrv/usbdrvasm16.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm16.inc
rename to protocol/vusb/usbdrv/usbdrvasm16.inc
diff --git a/vusb/usbdrv/usbdrvasm165.inc b/protocol/vusb/usbdrv/usbdrvasm165.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm165.inc
rename to protocol/vusb/usbdrv/usbdrvasm165.inc
diff --git a/vusb/usbdrv/usbdrvasm18-crc.inc b/protocol/vusb/usbdrv/usbdrvasm18-crc.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm18-crc.inc
rename to protocol/vusb/usbdrv/usbdrvasm18-crc.inc
diff --git a/vusb/usbdrv/usbdrvasm20.inc b/protocol/vusb/usbdrv/usbdrvasm20.inc
similarity index 100%
rename from vusb/usbdrv/usbdrvasm20.inc
rename to protocol/vusb/usbdrv/usbdrvasm20.inc
diff --git a/vusb/usbdrv/usbportability.h b/protocol/vusb/usbdrv/usbportability.h
similarity index 100%
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rename to protocol/vusb/usbdrv/usbportability.h
diff --git a/vusb/vusb.c b/protocol/vusb/vusb.c
similarity index 100%
rename from vusb/vusb.c
rename to protocol/vusb/vusb.c
diff --git a/vusb/vusb.h b/protocol/vusb/vusb.h
similarity index 100%
rename from vusb/vusb.h
rename to protocol/vusb/vusb.h