integrate V-USB support into ps2_usb

13 files changed, 1084 insertions, 109 deletions

diff --git a/ps2_usb/Makefile b/ps2_usb/Makefile
index bd9a76eb85..af73be2c92 100644
--- a/ps2_usb/Makefile
+++ b/ps2_usb/Makefile
@@ -1,46 +1,5 @@
-# Hey Emacs, this is a -*- makefile -*-
-#----------------------------------------------------------------------------
-# WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, et al.
-#
-# Released to the Public Domain
-#
-# Additional material for this makefile was written by:
-# Peter Fleury
-# Tim Henigan
-# Colin O'Flynn
-# Reiner Patommel
-# Markus Pfaff
-# Sander Pool
-# Frederik Rouleau
-# Carlos Lamas
-#
-#----------------------------------------------------------------------------
-# On command line:
-#
-# make all = Make software.
-#
-# make clean = Clean out built project files.
-#
-# make coff = Convert ELF to AVR COFF.
-#
-# make extcoff = Convert ELF to AVR Extended COFF.
-#
-# make program = Download the hex file to the device, using avrdude.
-#                Please customize the avrdude settings below first!
-#
-# make debug = Start either simulavr or avarice as specified for debugging, 
-#              with avr-gdb or avr-insight as the front end for debugging.
-#
-# make filename.s = Just compile filename.c into the assembler code only.
-#
-# make filename.i = Create a preprocessed source file for use in submitting
-#                   bug reports to the GCC project.
-#
-# To rebuild project do "make clean" then "make all".
-#----------------------------------------------------------------------------
-
 # Target file name (without extension).
-TARGET = tmk_ps2_usb
+TARGET = ps2_usb
 
 # Directory common source filess exist
 COMMON_DIR = ..
@@ -49,10 +8,14 @@ COMMON_DIR = ..
 TARGET_DIR = .
 
 # keyboard dependent files
-TARGET_SRC =	keymap.c \
+TARGET_SRC =	main_pjrc.c \
+		keymap.c \
   	        matrix.c \
+		led.c \
 		ps2.c
 
+CONFIG_H = config_pjrc.h
+
 
 # MCU name, you MUST set this to match the board you are using
 # type "make clean" after changing this, so all files will be rebuilt
@@ -78,4 +41,11 @@ USB_EXTRA_ENABLE = yes	# Enhanced feature for Windows(Audio control and System c
 USB_NKRO_ENABLE = yes	# USB Nkey Rollover
 
 
+
+#---------------- Programming Options --------------------------
+PROGRAM_CMD = teensy_loader_cli.exe -mmcu=$(MCU) -w -v $(TARGET).hex
+
+
+
+include $(COMMON_DIR)/Makefile.pjrc
 include $(COMMON_DIR)/Makefile.common
diff --git a/ps2_usb/Makefile.vusb b/ps2_usb/Makefile.vusb
new file mode 100644
index 0000000000..7b69dc27b5
--- /dev/null
+++ b/ps2_usb/Makefile.vusb
@@ -0,0 +1,84 @@
+# Target file name (without extension).
+TARGET = ps2_vusb
+
+# Directory common source filess exist
+COMMON_DIR = ..
+
+# Directory keyboard dependent files exist
+TARGET_DIR = .
+
+# keyboard dependent files
+TARGET_SRC =	main_vusb.c \
+		keymap.c \
+		matrix.c \
+		led.c \
+		ps2_usart.c \
+		sendchar_dummy.c
+#		sendchar_usart.c
+
+CONFIG_H = config_vusb.h
+
+
+OPT_DEFS = -DDEBUG_LEVEL=0
+
+
+# MCU name, you MUST set this to match the board you are using
+# type "make clean" after changing this, so all files will be rebuilt
+#MCU = at90usb162       # Teensy 1.0
+#MCU = atmega32u4       # Teensy 2.0
+#MCU = at90usb646       # Teensy++ 1.0
+#MCU = at90usb1286      # Teensy++ 2.0
+MCU = atmega168
+
+
+# Processor frequency.
+#   Normally the first thing your program should do is set the clock prescaler,
+#   so your program will run at the correct speed.  You should also set this
+#   variable to same clock speed.  The _delay_ms() macro uses this, and many
+#   examples use this variable to calculate timings.  Do not add a "UL" here.
+F_CPU = 20000000
+
+
+# Build Options
+#   comment out to disable the options.
+#
+MOUSEKEY_ENABLE = yes	# Mouse keys
+#USB_EXTRA_ENABLE = yes	# Enhanced feature for Windows(Audio control and System control)
+#USB_NKRO_ENABLE = yes	# USB Nkey Rollover
+
+
+
+#---------------- Programming Options --------------------------
+AVRDUDE = avrdude
+# Type: avrdude -c ? to get a full listing.
+AVRDUDE_PROGRAMMER = usbasp
+AVRDUDE_PORT =
+AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
+#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
+
+# Uncomment the following if you want avrdude's erase cycle counter.
+# Note that this counter needs to be initialized first using -Yn,
+# see avrdude manual.
+#AVRDUDE_ERASE_COUNTER = -y
+
+# Uncomment the following if you do /not/ wish a verification to be
+# performed after programming the device.
+#AVRDUDE_NO_VERIFY = -V
+
+# Increase verbosity level.  Please use this when submitting bug
+# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude> 
+# to submit bug reports.
+#AVRDUDE_VERBOSE = -v -v
+
+#AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
+AVRDUDE_FLAGS = -p $(MCU) -c $(AVRDUDE_PROGRAMMER)
+AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
+AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
+AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
+
+PROGRAM_CMD = $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
+
+
+
+include $(COMMON_DIR)/Makefile.vusb
+include $(COMMON_DIR)/Makefile.common
diff --git a/ps2_usb/README b/ps2_usb/README
index 3c9eb14282..ad5c6c4311 100644
--- a/ps2_usb/README
+++ b/ps2_usb/README
@@ -47,10 +47,10 @@ Keymap customization
     You can customize keymaps easily by editing source code.
 
 
-Build
------
+Build for Teensy
+----------------
 0. Connect PS/2 keyboard to Teensy by 4 lines(Vcc, GND, Data, Clock).
-1. Define following macros for PS/2 connection in config.h:
+1. Define following macros for PS/2 connection in config_pjrc.h:
    PS2_DATA_PORT
    PS2_DATA_PIN
    PS2_DATA_DDR
@@ -65,6 +65,15 @@ Build
    http://www.pjrc.com/teensy/loader.html
 
 
+Build for V-USB
+---------------
+0. Build V-USB controller board and connect PS/2 keyboard.
+1. Define macros in config_vusb.h if needed.
+2. Edit Makefile.vusb for build options and MCU setting.
+3. make -f Makefile.vusb
+4. program your V-USB controller.
+
+
 Keymap
 ------
 You can change a keymap by editing code of keymap.c like following.
diff --git a/ps2_usb/config.h b/ps2_usb/config_pjrc.h
index be96f004a8..6205c48015 100644
--- a/ps2_usb/config.h
+++ b/ps2_usb/config_pjrc.h
@@ -10,22 +10,26 @@
 #define PRODUCT         PS/2 keyboard converter
 #define DESCRIPTION     convert PS/2 keyboard to USB
 
+
 /* matrix size */
 #define MATRIX_ROWS 32  // keycode bit: 3-0
 #define MATRIX_COLS 8   // keycode bit: 6-4
-/* define if matrix has ghost */
-//#define MATRIX_HAS_GHOST
 
-/* USB NKey Rollover */
-#ifdef USB_NKRO_ENABLE
-#endif
+
+/* key combination for command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (BIT_LSHIFT | BIT_RSHIFT) || \
+    keyboard_report->mods == (BIT_LCTRL | BIT_RSHIFT) \
+)
+
 
 /* mouse keys */
 #ifdef MOUSEKEY_ENABLE
 #   define MOUSEKEY_DELAY_TIME 255
 #endif
 
-/* PS/2 mouse */
+
+/* PS/2 lines */
 #define PS2_CLOCK_PORT  PORTF
 #define PS2_CLOCK_PIN   PINF
 #define PS2_CLOCK_DDR   DDRF
diff --git a/ps2_usb/config_vusb.h b/ps2_usb/config_vusb.h
new file mode 100644
index 0000000000..0463f68ba9
--- /dev/null
+++ b/ps2_usb/config_vusb.h
@@ -0,0 +1,116 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x2233
+// TODO: share these strings with usbconfig.h
+// Edit usbconfig.h to change these.
+#define MANUFACTURER    t.m.k.
+#define PRODUCT         PS/2 keyboard converter
+#define DESCRIPTION     convert PS/2 keyboard to USB
+
+
+/* matrix size */
+#define MATRIX_ROWS 32  // keycode bit: 3-0
+#define MATRIX_COLS 8   // keycode bit: 6-4
+
+
+/* key combination for command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (BIT_LSHIFT | BIT_RSHIFT) || \
+    keyboard_report->mods == (BIT_LCTRL | BIT_RSHIFT) \
+)
+
+
+/* mouse keys */
+#ifdef MOUSEKEY_ENABLE
+#   define MOUSEKEY_DELAY_TIME 255
+#endif
+
+
+/* PS/2 lines */
+#define PS2_CLOCK_PORT  PORTD
+#define PS2_CLOCK_PIN   PIND
+#define PS2_CLOCK_DDR   DDRD
+#define PS2_CLOCK_BIT   4
+#define PS2_DATA_PORT   PORTD
+#define PS2_DATA_PIN    PIND
+#define PS2_DATA_DDR    DDRD
+#define PS2_DATA_BIT    0
+
+
+// Synchronous USART is used to receive data from keyboard.
+// Use RXD pin for PS/2 DATA line and XCK for PS/2 CLOCK.
+// NOTE: This is recomended strongly if you use V-USB library.
+#define PS2_USE_USART
+
+// External or Pin Change Interrupt is used to receive data from keyboard.
+// Use INT1 or PCINTxx for PS/2 CLOCK line. see below.
+//#define PS2_USE_INT
+
+
+#ifdef PS2_USE_USART
+// synchronous, odd parity, 1-bit stop, 8-bit data, sample at falling edge
+// set DDR of CLOCK as input to be slave
+#define PS2_USART_INIT() do {   \
+    PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);   \
+    PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);     \
+    UCSR0C = ((1 << UMSEL00) |  \
+              (3 << UPM00)   |  \
+              (0 << USBS0)   |  \
+              (3 << UCSZ00)  |  \
+              (0 << UCPOL0));   \
+    UCSR0A = 0;                 \
+    UBRR0H = 0;                 \
+    UBRR0L = 0;                 \
+} while (0)
+#define PS2_USART_RX_INT_ON() do {  \
+    UCSR0B = ((1 << RXCIE0) |       \
+              (1 << RXEN0));        \
+} while (0)
+#define PS2_USART_RX_POLL_ON() do { \
+    UCSR0B = (1 << RXEN0);          \
+} while (0)
+#define PS2_USART_OFF() do {    \
+    UCSR0C = 0;                 \
+    UCSR0B &= ~((1 << RXEN0) |  \
+                (1 << TXEN0));  \
+} while (0)
+#define PS2_USART_RX_READY      (UCSR0A & (1<<RXC0))
+#define PS2_USART_RX_DATA       UDR0
+#define PS2_USART_ERROR         (UCSR0A & ((1<<FE0) | (1<<DOR0) | (1<<UPE0)))
+#define PS2_USART_RX_VECT       USART_RX_vect
+#endif
+
+
+#ifdef PS2_USE_INT
+/* INT1
+#define PS2_INT_INIT()  do {    \
+    EICRA |= ((1<<ISC11) |      \
+              (0<<ISC10));      \
+} while (0)
+#define PS2_INT_ON()  do {      \
+    EIMSK |= (1<<INT1);         \
+} while (0)
+#define PS2_INT_OFF() do {      \
+    EIMSK &= ~(1<<INT1);        \
+} while (0)
+#define PS2_INT_VECT    INT1_vect
+*/
+
+/* PCINT20 */
+#define PS2_INT_INIT()  do {    \
+    PCICR  |= (1<<PCIE2);       \
+} while (0)
+#define PS2_INT_ON()  do {      \
+    PCMSK2 |= (1<<PCINT20);     \
+} while (0)
+#define PS2_INT_OFF() do {      \
+    PCMSK2 &= ~(1<<PCINT20);    \
+    PCICR  &= ~(1<<PCIE2);      \
+} while (0)
+#define PS2_INT_VECT    PCINT2_vect
+#endif
+
+#endif
diff --git a/ps2_usb/keymap.c b/ps2_usb/keymap.c
index 47db18bfa1..253351f697 100644
--- a/ps2_usb/keymap.c
+++ b/ps2_usb/keymap.c
@@ -4,12 +4,11 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include <avr/pgmspace.h>
-#include "usb_keyboard.h"
 #include "usb_keycodes.h"
 #include "print.h"
 #include "debug.h"
 #include "util.h"
-#include "keymap_skel.h"
+#include "keymap.h"
 
 
 #define KEYCODE(layer, row, col) (pgm_read_byte(&keymaps[(layer)][(row)][(col)]))
@@ -181,9 +180,3 @@ uint8_t keymap_fn_keycode(uint8_t fn_bits)
 {
     return pgm_read_byte(&fn_keycode[(biton(fn_bits))]);
 }
-
-// define a condition to enter special function mode
-bool keymap_is_special_mode(uint8_t fn_bits)
-{
-    return usb_keyboard_mods == (BIT_LSHIFT | BIT_RSHIFT) || usb_keyboard_mods == (BIT_LCTRL | BIT_RSHIFT);
-}
diff --git a/ps2_usb/led.c b/ps2_usb/led.c
new file mode 100644
index 0000000000..d69b1c6759
--- /dev/null
+++ b/ps2_usb/led.c
@@ -0,0 +1,16 @@
+#include "stdint.h"
+#include "ps2.h"
+#include "led.h"
+
+
+void led_set(uint8_t usb_led)
+{
+    uint8_t ps2_led = 0;
+    if (usb_led &  (1<<USB_LED_SCROLL_LOCK))
+        ps2_led |= (1<<PS2_LED_SCROLL_LOCK);
+    if (usb_led &  (1<<USB_LED_NUM_LOCK))
+        ps2_led |= (1<<PS2_LED_NUM_LOCK);
+    if (usb_led &  (1<<USB_LED_CAPS_LOCK))
+        ps2_led |= (1<<PS2_LED_CAPS_LOCK);
+    ps2_host_set_led(ps2_led);
+}
diff --git a/ps2_usb/main_vusb.c b/ps2_usb/main_vusb.c
new file mode 100644
index 0000000000..ec7c5797a1
--- /dev/null
+++ b/ps2_usb/main_vusb.c
@@ -0,0 +1,62 @@
+/* PS/2 to USB keyboard converter
+ * 2011/02/20
+ * Copyright (c) 2011 tmk
+ */
+/* Name: main.c
+ * Project: hid-mouse, a very simple HID example
+ * Author: Christian Starkjohann
+ * Creation Date: 2008-04-07
+ * Tabsize: 4
+ * Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: main.c 790 2010-05-30 21:00:26Z cs $
+ */
+#include <stdint.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "usbdrv.h"
+#include "oddebug.h"
+#include "host_vusb.h"
+#include "keyboard.h"
+
+
+#if 0
+#define DEBUGP_INIT() do { DDRC = 0xFF; } while (0)
+#define DEBUGP(x) do { PORTC = x; } while (0)
+#else
+#define DEBUGP_INIT()
+#define DEBUGP(x)
+#endif
+
+
+int main(void)
+{
+    DEBUGP_INIT();
+    wdt_enable(WDTO_1S);
+    odDebugInit();
+    usbInit();
+
+    /* enforce re-enumeration, do this while interrupts are disabled! */
+    usbDeviceDisconnect();
+    uint8_t i = 0;
+    /* fake USB disconnect for > 250 ms */
+    while(--i){
+        wdt_reset();
+        _delay_ms(1);
+    }
+    usbDeviceConnect();
+
+    keyboard_init();
+
+    sei();
+    while (1) {
+        DEBUGP(0x1);
+        wdt_reset();
+        usbPoll();
+        DEBUGP(0x2);
+        keyboard_proc();
+        DEBUGP(0x3);
+        host_vusb_keyboard_send();
+    }
+}
diff --git a/ps2_usb/matrix.c b/ps2_usb/matrix.c
index aaf89719ef..52479d9752 100644
--- a/ps2_usb/matrix.c
+++ b/ps2_usb/matrix.c
@@ -9,8 +9,7 @@
 #include "util.h"
 #include "debug.h"
 #include "ps2.h"
-#include "usb_keyboard.h"
-#include "matrix_skel.h"
+#include "matrix.h"
 
 
 #if (MATRIX_COLS > 16)
@@ -60,8 +59,6 @@ static bool matrix_has_ghost_in_row(uint8_t row);
 #endif
 static void matrix_make(uint8_t code);
 static void matrix_break(uint8_t code);
-static void ps2_reset(void);
-static void ps2_set_leds(uint8_t leds);
 
 
 inline
@@ -78,20 +75,8 @@ uint8_t matrix_cols(void)
 
 void matrix_init(void)
 {
-    print_enable = true;
     ps2_host_init();
 
-    ps2_reset();
-
-    // flush LEDs
-    ps2_set_leds(1<<PS2_LED_NUM_LOCK);
-    _delay_ms(100);
-    ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK);
-    _delay_ms(100);
-    ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK|1<<PS2_LED_SCROLL_LOCK);
-    _delay_ms(300);
-    ps2_set_leds(0x00);
-    
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 
@@ -191,7 +176,6 @@ uint8_t matrix_scan(void)
 
     uint8_t code;
     while ((code = ps2_host_recv())) {
-debug_hex(code); debug(" ");
         switch (state) {
             case INIT:
                 switch (code) {
@@ -349,22 +333,6 @@ debug_hex(code); debug(" ");
                 state = INIT;
         }
     }
-
-    // handle LED indicators
-    static uint8_t prev_leds = 0;
-    if (prev_leds != usb_keyboard_leds) {
-        uint8_t leds = 0;
-        if (usb_keyboard_leds&(1<<USB_LED_SCROLL_LOCK))
-            leds |= (1<<PS2_LED_SCROLL_LOCK);
-        if (usb_keyboard_leds&(1<<USB_LED_NUM_LOCK))
-            leds |= (1<<PS2_LED_NUM_LOCK);
-        if (usb_keyboard_leds&(1<<USB_LED_CAPS_LOCK))
-            leds |= (1<<PS2_LED_CAPS_LOCK);
-
-        ps2_set_leds(leds);
-        prev_leds = usb_keyboard_leds;
-    }
-
     return 1;
 }
 
@@ -472,19 +440,3 @@ static void matrix_break(uint8_t code)
         is_modified = true;
     }
 }
-
-static void ps2_reset(void)
-{
-    ps2_host_send(0xFF);
-    ps2_host_recv(); // 0xFA
-    ps2_host_recv(); // 0xAA
-    _delay_ms(1000);
-}
-
-static void ps2_set_leds(uint8_t leds)
-{
-        ps2_host_send(0xED);
-        ps2_host_recv();        // 0xFA
-        ps2_host_send(leds);
-        ps2_host_recv();        // 0xFA
-}
diff --git a/ps2_usb/ps2_usart.c b/ps2_usb/ps2_usart.c
new file mode 100644
index 0000000000..e45b94c93b
--- /dev/null
+++ b/ps2_usb/ps2_usart.c
@@ -0,0 +1,325 @@
+/*
+Copyright (c) 2010,2011 Jun WAKO <wakojun@gmail.com>
+
+This software is licensed with a Modified BSD License.
+All of this is supposed to be Free Software, Open Source, DFSG-free,
+GPL-compatible, and OK to use in both free and proprietary applications.
+Additions and corrections to this file are welcome.
+
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in
+  the documentation and/or other materials provided with the
+  distribution.
+
+* Neither the name of the copyright holders nor the names of
+  contributors may be used to endorse or promote products derived
+  from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+*/
+/*
+Primitive PS/2 Library for AVR
+==============================
+Host side is only supported now.
+Synchronous USART is used to receive data by hardware process
+rather than interrupt. During V-USB interrupt runs, CLOCK interrupt
+cannot interpose. In the result it is prone to lost CLOCK edge.
+
+
+I/O control
+-----------
+High state is asserted by internal pull-up.
+If you have a signaling problem, you may need to have
+external pull-up resisters on CLOCK and DATA line.
+
+
+PS/2 References
+---------------
+http://www.computer-engineering.org/ps2protocol/
+http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
+*/
+#include <stdbool.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "ps2.h"
+#include "debug.h"
+
+
+#if 0
+#define DEBUGP_INIT() do { DDRC = 0xFF; } while (0)
+#define DEBUGP(x) do { PORTC = x; } while (0)
+#else
+#define DEBUGP_INIT()
+#define DEBUGP(x)
+#endif
+
+#define WAIT(stat, us, err) do { \
+    if (!wait_##stat(us)) { \
+        ps2_error = err; \
+        goto ERROR; \
+    } \
+} while (0)
+
+
+uint8_t ps2_error = PS2_ERR_NONE;
+
+
+static inline void clock_lo(void);
+static inline void clock_hi(void);
+static inline bool clock_in(void);
+static inline void data_lo(void);
+static inline void data_hi(void);
+static inline bool data_in(void);
+static inline uint16_t wait_clock_lo(uint16_t us);
+static inline uint16_t wait_clock_hi(uint16_t us);
+static inline uint16_t wait_data_lo(uint16_t us);
+static inline uint16_t wait_data_hi(uint16_t us);
+static inline void idle(void);
+static inline void inhibit(void);
+#if defined PS2_USE_INT || defined PS2_USE_USART
+static inline uint8_t pbuf_dequeue(void);
+static inline void pbuf_enqueue(uint8_t data);
+#endif
+
+
+void ps2_host_init(void)
+{
+    DEBUGP_INIT();
+    DEBUGP(0x1);
+    idle();
+    PS2_USART_INIT();
+    PS2_USART_RX_INT_ON();
+}
+
+uint8_t ps2_host_send(uint8_t data)
+{
+    uint8_t res = 0;
+    bool parity = true;
+    ps2_error = PS2_ERR_NONE;
+
+    DEBUGP(0x6);
+    PS2_USART_OFF();
+
+    /* terminate a transmission if we have */
+    inhibit();
+    _delay_us(100);
+
+    /* start bit [1] */
+    data_lo();
+    clock_hi();
+    WAIT(clock_lo, 15000, 1);
+    /* data [2-9] */
+    for (uint8_t i = 0; i < 8; i++) {
+        _delay_us(15);
+        if (data&(1<<i)) {
+            parity = !parity;
+            data_hi();
+        } else {
+            data_lo();
+        }
+        WAIT(clock_hi, 50, 2);
+        WAIT(clock_lo, 50, 3);
+    }
+    /* parity [10] */
+    _delay_us(15);
+    if (parity) { data_hi(); } else { data_lo(); }
+    WAIT(clock_hi, 50, 4);
+    WAIT(clock_lo, 50, 5);
+    /* stop bit [11] */
+    _delay_us(15);
+    data_hi();
+    /* ack [12] */
+    WAIT(data_lo, 50, 6);
+    WAIT(clock_lo, 50, 7);
+
+    /* wait for idle state */
+    WAIT(clock_hi, 50, 8);
+    WAIT(data_hi, 50, 9);
+
+    res = ps2_host_recv_response();
+ERROR:
+    idle();
+    PS2_USART_INIT();
+    PS2_USART_RX_INT_ON();
+    return res;
+}
+
+// Do polling data from keyboard to get response to last command.
+uint8_t ps2_host_recv_response(void)
+{
+    uint8_t data = 0;
+    PS2_USART_INIT();
+    PS2_USART_RX_POLL_ON();
+    while (!PS2_USART_RX_READY)
+        ;
+    data = PS2_USART_RX_DATA;
+    PS2_USART_OFF();
+    DEBUGP(0x9);
+    return data;
+}
+
+uint8_t ps2_host_recv(void)
+{
+    return pbuf_dequeue();
+}
+
+ISR(PS2_USART_RX_VECT)
+{
+    DEBUGP(0x7);
+    uint8_t error = PS2_USART_ERROR;
+    uint8_t data = PS2_USART_RX_DATA;
+    if (error) {
+        DEBUGP(error>>2);
+    } else {
+        pbuf_enqueue(data);
+    }
+    DEBUGP(0x8);
+}
+
+/* send LED state to keyboard */
+void ps2_host_set_led(uint8_t led)
+{
+    // send 0xED then keyboard keeps waiting for next LED data
+    // and keyboard does not send any scan codes during waiting.
+    // If fail to send LED data keyboard looks like being freezed.
+    uint8_t retry = 3;
+    while (retry-- && ps2_host_send(PS2_SET_LED) != PS2_ACK)
+        ;
+    retry = 3;
+    while (retry-- && ps2_host_send(led) != PS2_ACK)
+        ;
+}
+
+
+/*--------------------------------------------------------------------
+ * static functions
+ *------------------------------------------------------------------*/
+static inline void clock_lo()
+{
+    PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
+    PS2_CLOCK_DDR  |=  (1<<PS2_CLOCK_BIT);
+}
+static inline void clock_hi()
+{
+    /* input with pull up */
+    PS2_CLOCK_DDR  &= ~(1<<PS2_CLOCK_BIT);
+    PS2_CLOCK_PORT |=  (1<<PS2_CLOCK_BIT);
+}
+static inline bool clock_in()
+{
+    PS2_CLOCK_DDR  &= ~(1<<PS2_CLOCK_BIT);
+    PS2_CLOCK_PORT |=  (1<<PS2_CLOCK_BIT);
+    _delay_us(1);
+    return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT);
+}
+static inline void data_lo()
+{
+    PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT);
+    PS2_DATA_DDR  |=  (1<<PS2_DATA_BIT);
+}
+static inline void data_hi()
+{
+    /* input with pull up */
+    PS2_DATA_DDR  &= ~(1<<PS2_DATA_BIT);
+    PS2_DATA_PORT |=  (1<<PS2_DATA_BIT);
+}
+static inline bool data_in()
+{
+    PS2_DATA_DDR  &= ~(1<<PS2_DATA_BIT);
+    PS2_DATA_PORT |=  (1<<PS2_DATA_BIT);
+    _delay_us(1);
+    return PS2_DATA_PIN&(1<<PS2_DATA_BIT);
+}
+
+static inline uint16_t wait_clock_lo(uint16_t us)
+{
+    while (clock_in()  && us) { asm(""); _delay_us(1); us--; }
+    return us;
+}
+static inline uint16_t wait_clock_hi(uint16_t us)
+{
+    while (!clock_in() && us) { asm(""); _delay_us(1); us--; }
+    return us;
+}
+static inline uint16_t wait_data_lo(uint16_t us)
+{
+    while (data_in() && us)  { asm(""); _delay_us(1); us--; }
+    return us;
+}
+static inline uint16_t wait_data_hi(uint16_t us)
+{
+    while (!data_in() && us)  { asm(""); _delay_us(1); us--; }
+    return us;
+}
+
+/* idle state that device can send */
+static inline void idle(void)
+{
+    clock_hi();
+    data_hi();
+}
+
+/* inhibit device to send */
+static inline void inhibit(void)
+{
+    clock_lo();
+    data_hi();
+}
+
+
+/*--------------------------------------------------------------------
+ * Ring buffer to store scan codes from keyboard
+ *------------------------------------------------------------------*/
+#define PBUF_SIZE 8
+static uint8_t pbuf[PBUF_SIZE];
+static uint8_t pbuf_head = 0;
+static uint8_t pbuf_tail = 0;
+static inline void pbuf_enqueue(uint8_t data)
+{
+    if (!data)
+        return;
+
+    uint8_t sreg = SREG;
+    cli();
+    uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
+    if (next != pbuf_tail) {
+        pbuf[pbuf_head] = data;
+        pbuf_head = next;
+    } else {
+        debug("pbuf: full\n");
+    }
+    SREG = sreg;
+}
+
+static inline uint8_t pbuf_dequeue(void)
+{
+    uint8_t val = 0;
+
+    uint8_t sreg = SREG;
+    cli();
+    if (pbuf_head != pbuf_tail) {
+        val = pbuf[pbuf_tail];
+        pbuf_tail = (pbuf_tail + 1) % PBUF_SIZE;
+    }
+    SREG = sreg;
+
+    return val;
+}
diff --git a/ps2_usb/sendchar_dummy.c b/ps2_usb/sendchar_dummy.c
new file mode 100644
index 0000000000..8c9e583f12
--- /dev/null
+++ b/ps2_usb/sendchar_dummy.c
@@ -0,0 +1,8 @@
+#include <stdint.h>
+#include "sendchar.h"
+
+
+int8_t sendchar(uint8_t c)
+{
+    return 1;
+}
diff --git a/ps2_usb/sendchar_usart.c b/ps2_usb/sendchar_usart.c
new file mode 100644
index 0000000000..fe18177a3c
--- /dev/null
+++ b/ps2_usb/sendchar_usart.c
@@ -0,0 +1,58 @@
+#include <stdint.h>
+#include "oddebug.h"
+#include "sendchar.h"
+
+
+/* from oddebug.h */
+#if defined UBRR
+#   define  ODDBG_UBRR  UBRR
+#elif defined UBRRL
+#   define  ODDBG_UBRR  UBRRL
+#elif defined UBRR0
+#   define  ODDBG_UBRR  UBRR0
+#elif defined UBRR0L
+#   define  ODDBG_UBRR  UBRR0L
+#endif
+
+#if defined UCR
+#   define  ODDBG_UCR   UCR
+#elif defined UCSRB
+#   define  ODDBG_UCR   UCSRB
+#elif defined UCSR0B
+#   define  ODDBG_UCR   UCSR0B
+#endif
+
+#if defined TXEN
+#   define  ODDBG_TXEN  TXEN
+#else
+#   define  ODDBG_TXEN  TXEN0
+#endif
+
+#if defined USR
+#   define  ODDBG_USR   USR
+#elif defined UCSRA
+#   define  ODDBG_USR   UCSRA
+#elif defined UCSR0A
+#   define  ODDBG_USR   UCSR0A
+#endif
+
+#if defined UDRE
+#   define  ODDBG_UDRE  UDRE
+#else
+#   define  ODDBG_UDRE  UDRE0
+#endif
+
+#if defined UDR
+#   define  ODDBG_UDR   UDR
+#elif defined UDR0
+#   define  ODDBG_UDR   UDR0
+#endif
+
+
+/* from oddebug.c */
+int8_t sendchar(uint8_t c)
+{
+    while(!(ODDBG_USR & (1 << ODDBG_UDRE)));    /* wait for data register empty */
+    ODDBG_UDR = c;
+    return 1;
+}
diff --git a/ps2_usb/usbconfig.h b/ps2_usb/usbconfig.h
new file mode 100644
index 0000000000..9038f1eb8c
--- /dev/null
+++ b/ps2_usb/usbconfig.h
@@ -0,0 +1,378 @@
+/* Name: usbconfig.h
+ * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers
+ * Author: Christian Starkjohann
+ * Creation Date: 2005-04-01
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: usbconfig-prototype.h 785 2010-05-30 17:57:07Z cs $
+ */
+
+#ifndef __usbconfig_h_included__
+#define __usbconfig_h_included__
+
+#include "config_vusb.h"
+
+/*
+General Description:
+This file is an example configuration (with inline documentation) for the USB
+driver. It configures V-USB for USB D+ connected to Port D bit 2 (which is
+also hardware interrupt 0 on many devices) and USB D- to Port D bit 4. You may
+wire the lines to any other port, as long as D+ is also wired to INT0 (or any
+other hardware interrupt, as long as it is the highest level interrupt, see
+section at the end of this file).
+*/
+
+/* ---------------------------- Hardware Config ---------------------------- */
+
+#define USB_CFG_IOPORTNAME      D
+/* This is the port where the USB bus is connected. When you configure it to
+ * "B", the registers PORTB, PINB and DDRB will be used.
+ */
+#define USB_CFG_DMINUS_BIT      3
+/* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
+ * This may be any bit in the port.
+ */
+#define USB_CFG_DPLUS_BIT       2
+/* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
+ * This may be any bit in the port. Please note that D+ must also be connected
+ * to interrupt pin INT0! [You can also use other interrupts, see section
+ * "Optional MCU Description" below, or you can connect D- to the interrupt, as
+ * it is required if you use the USB_COUNT_SOF feature. If you use D- for the
+ * interrupt, the USB interrupt will also be triggered at Start-Of-Frame
+ * markers every millisecond.]
+ */
+#define USB_CFG_CLOCK_KHZ       (F_CPU/1000)
+/* Clock rate of the AVR in kHz. Legal values are 12000, 12800, 15000, 16000,
+ * 16500, 18000 and 20000. The 12.8 MHz and 16.5 MHz versions of the code
+ * require no crystal, they tolerate +/- 1% deviation from the nominal
+ * frequency. All other rates require a precision of 2000 ppm and thus a
+ * crystal!
+ * Since F_CPU should be defined to your actual clock rate anyway, you should
+ * not need to modify this setting.
+ */
+#define USB_CFG_CHECK_CRC       0
+/* Define this to 1 if you want that the driver checks integrity of incoming
+ * data packets (CRC checks). CRC checks cost quite a bit of code size and are
+ * currently only available for 18 MHz crystal clock. You must choose
+ * USB_CFG_CLOCK_KHZ = 18000 if you enable this option.
+ */
+
+/* ----------------------- Optional Hardware Config ------------------------ */
+
+/* #define USB_CFG_PULLUP_IOPORTNAME   D */
+/* If you connect the 1.5k pullup resistor from D- to a port pin instead of
+ * V+, you can connect and disconnect the device from firmware by calling
+ * the macros usbDeviceConnect() and usbDeviceDisconnect() (see usbdrv.h).
+ * This constant defines the port on which the pullup resistor is connected.
+ */
+/* #de