Relocate PS2 code (#14895)

* Relocate ps2 protocol code

* clang

* Move makefile logic

10 files changed, 0 insertions, 1485 deletions

diff --git a/tmk_core/protocol.mk b/tmk_core/protocol.mk
index 30c87a0f12..8aa063c911 100644
--- a/tmk_core/protocol.mk
+++ b/tmk_core/protocol.mk
@@ -1,30 +1,5 @@
 PROTOCOL_DIR = protocol
 
-ifeq ($(strip $(PS2_MOUSE_ENABLE)), yes)
-    SRC += $(PROTOCOL_DIR)/ps2_mouse.c
-    OPT_DEFS += -DPS2_MOUSE_ENABLE
-    OPT_DEFS += -DMOUSE_ENABLE
-endif
-
-ifeq ($(strip $(PS2_USE_BUSYWAIT)), yes)
-    SRC += protocol/ps2_busywait.c
-    SRC += protocol/ps2_io_avr.c
-    OPT_DEFS += -DPS2_USE_BUSYWAIT
-endif
-
-ifeq ($(strip $(PS2_USE_INT)), yes)
-    SRC += protocol/ps2_interrupt.c
-    SRC += protocol/ps2_io_$(PLATFORM_KEY).c
-    OPT_DEFS += -DPS2_USE_INT
-endif
-
-ifeq ($(strip $(PS2_USE_USART)), yes)
-    SRC += protocol/ps2_usart.c
-    SRC += protocol/ps2_io_$(PLATFORM_KEY).c
-    OPT_DEFS += -DPS2_USE_USART
-endif
-
-
 ifeq ($(strip $(SERIAL_MOUSE_MICROSOFT_ENABLE)), yes)
     SRC += $(PROTOCOL_DIR)/serial_mouse_microsoft.c
     OPT_DEFS += -DSERIAL_MOUSE_ENABLE -DSERIAL_MOUSE_MICROSOFT \
diff --git a/tmk_core/protocol/ps2.h b/tmk_core/protocol/ps2.h
deleted file mode 100644
index f123192852..0000000000
--- a/tmk_core/protocol/ps2.h
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
-Copyright 2010,2011,2012,2013 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.
-*/
-
-#pragma once
-
-#include <stdbool.h>
-#include "wait.h"
-#include "ps2_io.h"
-#include "print.h"
-
-/*
- * Primitive PS/2 Library for AVR
- *
- * PS/2 Resources
- * --------------
- * [1] The PS/2 Mouse/Keyboard Protocol
- * http://www.computer-engineering.org/ps2protocol/
- * Concise and thorough primer of PS/2 protocol.
- *
- * [2] Keyboard and Auxiliary Device Controller
- * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
- * Signal Timing and Format
- *
- * [3] Keyboards(101- and 102-key)
- * http://www.mcamafia.de/pdf/ibm_hitrc11.pdf
- * Keyboard Layout, Scan Code Set, POR, and Commands.
- *
- * [4] PS/2 Reference Manuals
- * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
- * Collection of IBM Personal System/2 documents.
- *
- * [5] TrackPoint Engineering Specifications for version 3E
- * https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
- */
-#define PS2_ACK 0xFA
-#define PS2_RESEND 0xFE
-#define PS2_SET_LED 0xED
-
-// TODO: error numbers
-#define PS2_ERR_NONE 0
-#define PS2_ERR_STARTBIT1 1
-#define PS2_ERR_STARTBIT2 2
-#define PS2_ERR_STARTBIT3 3
-#define PS2_ERR_PARITY 0x10
-#define PS2_ERR_NODATA 0x20
-
-#define PS2_LED_SCROLL_LOCK 0
-#define PS2_LED_NUM_LOCK 1
-#define PS2_LED_CAPS_LOCK 2
-
-extern uint8_t ps2_error;
-
-void    ps2_host_init(void);
-uint8_t ps2_host_send(uint8_t data);
-uint8_t ps2_host_recv_response(void);
-uint8_t ps2_host_recv(void);
-void    ps2_host_set_led(uint8_t usb_led);
-
-/*--------------------------------------------------------------------
- * static functions
- *------------------------------------------------------------------*/
-static inline uint16_t wait_clock_lo(uint16_t us) {
-    while (clock_in() && us) {
-        asm("");
-        wait_us(1);
-        us--;
-    }
-    return us;
-}
-static inline uint16_t wait_clock_hi(uint16_t us) {
-    while (!clock_in() && us) {
-        asm("");
-        wait_us(1);
-        us--;
-    }
-    return us;
-}
-static inline uint16_t wait_data_lo(uint16_t us) {
-    while (data_in() && us) {
-        asm("");
-        wait_us(1);
-        us--;
-    }
-    return us;
-}
-static inline uint16_t wait_data_hi(uint16_t us) {
-    while (!data_in() && us) {
-        asm("");
-        wait_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();
-}
diff --git a/tmk_core/protocol/ps2_busywait.c b/tmk_core/protocol/ps2_busywait.c
deleted file mode 100644
index 983194eea8..0000000000
--- a/tmk_core/protocol/ps2_busywait.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
-Copyright 2010,2011,2012,2013 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.
-*/
-
-/*
- * PS/2 protocol busywait version
- */
-
-#include <stdbool.h>
-#include "wait.h"
-#include "ps2.h"
-#include "ps2_io.h"
-#include "debug.h"
-
-#define WAIT(stat, us, err)     \
-    do {                        \
-        if (!wait_##stat(us)) { \
-            ps2_error = err;    \
-            goto ERROR;         \
-        }                       \
-    } while (0)
-
-uint8_t ps2_error = PS2_ERR_NONE;
-
-void ps2_host_init(void) {
-    clock_init();
-    data_init();
-
-    // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
-    wait_ms(2500);
-
-    inhibit();
-}
-
-uint8_t ps2_host_send(uint8_t data) {
-    bool parity = true;
-    ps2_error   = PS2_ERR_NONE;
-
-    /* terminate a transmission if we have */
-    inhibit();
-    wait_us(100);  // 100us [4]p.13, [5]p.50
-
-    /* 'Request to Send' and Start bit */
-    data_lo();
-    clock_hi();
-    WAIT(clock_lo, 10000, 10);  // 10ms [5]p.50
-
-    /* Data bit */
-    for (uint8_t i = 0; i < 8; i++) {
-        wait_us(15);
-        if (data & (1 << i)) {
-            parity = !parity;
-            data_hi();
-        } else {
-            data_lo();
-        }
-        WAIT(clock_hi, 50, 2);
-        WAIT(clock_lo, 50, 3);
-    }
-
-    /* Parity bit */
-    wait_us(15);
-    if (parity) {
-        data_hi();
-    } else {
-        data_lo();
-    }
-    WAIT(clock_hi, 50, 4);
-    WAIT(clock_lo, 50, 5);
-
-    /* Stop bit */
-    wait_us(15);
-    data_hi();
-
-    /* Ack */
-    WAIT(data_lo, 50, 6);
-    WAIT(clock_lo, 50, 7);
-
-    /* wait for idle state */
-    WAIT(clock_hi, 50, 8);
-    WAIT(data_hi, 50, 9);
-
-    inhibit();
-    return ps2_host_recv_response();
-ERROR:
-    inhibit();
-    return 0;
-}
-
-/* receive data when host want else inhibit communication */
-uint8_t ps2_host_recv_response(void) {
-    // Command may take 25ms/20ms at most([5]p.46, [3]p.21)
-    // 250 * 100us(wait for start bit in ps2_host_recv)
-    uint8_t data = 0;
-    uint8_t try
-        = 250;
-    do {
-        data = ps2_host_recv();
-    } while (try --&&ps2_error);
-    return data;
-}
-
-/* called after start bit comes */
-uint8_t ps2_host_recv(void) {
-    uint8_t data   = 0;
-    bool    parity = true;
-    ps2_error      = PS2_ERR_NONE;
-
-    /* release lines(idle state) */
-    idle();
-
-    /* start bit [1] */
-    WAIT(clock_lo, 100, 1);  // TODO: this is enough?
-    WAIT(data_lo, 1, 2);
-    WAIT(clock_hi, 50, 3);
-
-    /* data [2-9] */
-    for (uint8_t i = 0; i < 8; i++) {
-        WAIT(clock_lo, 50, 4);
-        if (data_in()) {
-            parity = !parity;
-            data |= (1 << i);
-        }
-        WAIT(clock_hi, 50, 5);
-    }
-
-    /* parity [10] */
-    WAIT(clock_lo, 50, 6);
-    if (data_in() != parity) {
-        ps2_error = PS2_ERR_PARITY;
-        goto ERROR;
-    }
-    WAIT(clock_hi, 50, 7);
-
-    /* stop bit [11] */
-    WAIT(clock_lo, 50, 8);
-    WAIT(data_hi, 1, 9);
-    WAIT(clock_hi, 50, 10);
-
-    inhibit();
-    return data;
-ERROR:
-    if (ps2_error > PS2_ERR_STARTBIT3) {
-        xprintf("x%02X\n", ps2_error);
-    }
-    inhibit();
-    return 0;
-}
-
-/* send LED state to keyboard */
-void ps2_host_set_led(uint8_t led) {
-    ps2_host_send(0xED);
-    ps2_host_send(led);
-}
diff --git a/tmk_core/protocol/ps2_interrupt.c b/tmk_core/protocol/ps2_interrupt.c
deleted file mode 100644
index 70debd02f7..0000000000
--- a/tmk_core/protocol/ps2_interrupt.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
-Copyright 2010,2011,2012,2013 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.
-*/
-
-/*
- * PS/2 protocol Pin interrupt version
- */
-
-#include <stdbool.h>
-
-#if defined(__AVR__)
-#    include <avr/interrupt.h>
-#elif defined(PROTOCOL_CHIBIOS)  // TODO: or STM32 ?
-// chibiOS headers
-#    include "ch.h"
-#    include "hal.h"
-#endif
-
-#include "ps2.h"
-#include "ps2_io.h"
-#include "print.h"
-#include "wait.h"
-
-#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 uint8_t pbuf_dequeue(void);
-static inline void    pbuf_enqueue(uint8_t data);
-static inline bool    pbuf_has_data(void);
-static inline void    pbuf_clear(void);
-
-#if defined(PROTOCOL_CHIBIOS)
-void ps2_interrupt_service_routine(void);
-void palCallback(void *arg) { ps2_interrupt_service_routine(); }
-
-#    define PS2_INT_INIT()                                 \
-        { palSetLineMode(PS2_CLOCK_PIN, PAL_MODE_INPUT); } \
-        while (0)
-#    define PS2_INT_ON()                                                    \
-        {                                                                   \
-            palEnableLineEvent(PS2_CLOCK_PIN, PAL_EVENT_MODE_FALLING_EDGE); \
-            palSetLineCallback(PS2_CLOCK_PIN, palCallback, NULL);           \
-        }                                                                   \
-        while (0)
-#    define PS2_INT_OFF()                       \
-        { palDisableLineEvent(PS2_CLOCK_PIN); } \
-        while (0)
-#endif  // PROTOCOL_CHIBIOS
-
-void ps2_host_init(void) {
-    idle();
-    PS2_INT_INIT();
-    PS2_INT_ON();
-    // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
-    // wait_ms(2500);
-}
-
-uint8_t ps2_host_send(uint8_t data) {
-    bool parity = true;
-    ps2_error   = PS2_ERR_NONE;
-
-    PS2_INT_OFF();
-
-    /* terminate a transmission if we have */
-    inhibit();
-    wait_us(100);  // 100us [4]p.13, [5]p.50
-
-    /* 'Request to Send' and Start bit */
-    data_lo();
-    clock_hi();
-    WAIT(clock_lo, 10000, 10);  // 10ms [5]p.50
-
-    /* Data bit[2-9] */
-    for (uint8_t i = 0; i < 8; i++) {
-        if (data & (1 << i)) {
-            parity = !parity;
-            data_hi();
-        } else {
-            data_lo();
-        }
-        WAIT(clock_hi, 50, 2);
-        WAIT(clock_lo, 50, 3);
-    }
-
-    /* Parity bit */
-    wait_us(15);
-    if (parity) {
-        data_hi();
-    } else {
-        data_lo();
-    }
-    WAIT(clock_hi, 50, 4);
-    WAIT(clock_lo, 50, 5);
-
-    /* Stop bit */
-    wait_us(15);
-    data_hi();
-
-    /* Ack */
-    WAIT(data_lo, 50, 6);
-    WAIT(clock_lo, 50, 7);
-
-    /* wait for idle state */
-    WAIT(clock_hi, 50, 8);
-    WAIT(data_hi, 50, 9);
-
-    idle();
-    PS2_INT_ON();
-    return ps2_host_recv_response();
-ERROR:
-    idle();
-    PS2_INT_ON();
-    return 0;
-}
-
-uint8_t ps2_host_recv_response(void) {
-    // Command may take 25ms/20ms at most([5]p.46, [3]p.21)
-    uint8_t retry = 25;
-    while (retry-- && !pbuf_has_data()) {
-        wait_ms(1);
-    }
-    return pbuf_dequeue();
-}
-
-/* get data received by interrupt */
-uint8_t ps2_host_recv(void) {
-    if (pbuf_has_data()) {
-        ps2_error = PS2_ERR_NONE;
-        return pbuf_dequeue();
-    } else {
-        ps2_error = PS2_ERR_NODATA;
-        return 0;
-    }
-}
-
-void ps2_interrupt_service_routine(void) {
-    static enum {
-        INIT,
-        START,
-        BIT0,
-        BIT1,
-        BIT2,
-        BIT3,
-        BIT4,
-        BIT5,
-        BIT6,
-        BIT7,
-        PARITY,
-        STOP,
-    } state               = INIT;
-    static uint8_t data   = 0;
-    static uint8_t parity = 1;
-
-    // TODO: abort if elapse 100us from previous interrupt
-
-    // return unless falling edge
-    if (clock_in()) {
-        goto RETURN;
-    }
-
-    state++;
-    switch (state) {
-        case START:
-            if (data_in()) goto ERROR;
-            break;
-        case BIT0:
-        case BIT1:
-        case BIT2:
-        case BIT3:
-        case BIT4:
-        case BIT5:
-        case BIT6:
-        case BIT7:
-            data >>= 1;
-            if (data_in()) {
-                data |= 0x80;
-                parity++;
-            }
-            break;
-        case PARITY:
-            if (data_in()) {
-                if (!(parity & 0x01)) goto ERROR;
-            } else {
-                if (parity & 0x01) goto ERROR;
-            }
-            break;
-        case STOP:
-            if (!data_in()) goto ERROR;
-            pbuf_enqueue(data);
-            goto DONE;
-            break;
-        default:
-            goto ERROR;
-    }
-    goto RETURN;
-ERROR:
-    ps2_error = state;
-DONE:
-    state  = INIT;
-    data   = 0;
-    parity = 1;
-RETURN:
-    return;
-}
-
-#if defined(__AVR__)
-ISR(PS2_INT_VECT) { ps2_interrupt_service_routine(); }
-#endif
-
-/* send LED state to keyboard */
-void ps2_host_set_led(uint8_t led) {
-    ps2_host_send(0xED);
-    ps2_host_send(led);
-}
-
-/*--------------------------------------------------------------------
- * Ring buffer to store scan codes from keyboard
- *------------------------------------------------------------------*/
-#define PBUF_SIZE 32
-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 defined(__AVR__)
-    uint8_t sreg = SREG;
-    cli();
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysLockFromISR();
-#endif
-
-    uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
-    if (next != pbuf_tail) {
-        pbuf[pbuf_head] = data;
-        pbuf_head       = next;
-    } else {
-        print("pbuf: full\n");
-    }
-
-#if defined(__AVR__)
-    SREG = sreg;
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysUnlockFromISR();
-#endif
-}
-static inline uint8_t pbuf_dequeue(void) {
-    uint8_t val = 0;
-
-#if defined(__AVR__)
-    uint8_t sreg = SREG;
-    cli();
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysLock();
-#endif
-
-    if (pbuf_head != pbuf_tail) {
-        val       = pbuf[pbuf_tail];
-        pbuf_tail = (pbuf_tail + 1) % PBUF_SIZE;
-    }
-
-#if defined(__AVR__)
-    SREG = sreg;
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysUnlock();
-#endif
-
-    return val;
-}
-static inline bool pbuf_has_data(void) {
-#if defined(__AVR__)
-    uint8_t sreg = SREG;
-    cli();
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysLock();
-#endif
-
-    bool has_data = (pbuf_head != pbuf_tail);
-
-#if defined(__AVR__)
-    SREG = sreg;
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysUnlock();
-#endif
-    return has_data;
-}
-static inline void pbuf_clear(void) {
-#if defined(__AVR__)
-    uint8_t sreg = SREG;
-    cli();
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysLock();
-#endif
-
-    pbuf_head = pbuf_tail = 0;
-
-#if defined(__AVR__)
-    SREG = sreg;
-#elif defined(PROTOCOL_CHIBIOS)
-    chSysUnlock();
-#endif
-}
diff --git a/tmk_core/protocol/ps2_io.h b/tmk_core/protocol/ps2_io.h
deleted file mode 100644
index de93cb7a39..0000000000
--- a/tmk_core/protocol/ps2_io.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#pragma once
-
-void clock_init(void);
-void clock_lo(void);
-void clock_hi(void);
-bool clock_in(void);
-
-void data_init(void);
-void data_lo(void);
-void data_hi(void);
-bool data_in(void);
diff --git a/tmk_core/protocol/ps2_io_avr.c b/tmk_core/protocol/ps2_io_avr.c
deleted file mode 100644
index 7c826fbf1a..0000000000
--- a/tmk_core/protocol/ps2_io_avr.c
+++ /dev/null
@@ -1,51 +0,0 @@
-#include <stdbool.h>
-#include "ps2_io.h"
-#include "gpio.h"
-#include "wait.h"
-
-/* Check port settings for clock and data line */
-#if !(defined(PS2_CLOCK_PIN))
-#    error "PS/2 clock setting is required in config.h"
-#endif
-
-#if !(defined(PS2_DATA_PIN))
-#    error "PS/2 data setting is required in config.h"
-#endif
-
-/*
- * Clock
- */
-void clock_init(void) {}
-
-void clock_lo(void) {
-    // Transition from input with pull-up to output low via Hi-Z instead of output high
-    writePinLow(PS2_CLOCK_PIN);
-    setPinOutput(PS2_CLOCK_PIN);
-}
-
-void clock_hi(void) { setPinInputHigh(PS2_CLOCK_PIN); }
-
-bool clock_in(void) {
-    setPinInputHigh(PS2_CLOCK_PIN);
-    wait_us(1);
-    return readPin(PS2_CLOCK_PIN);
-}
-
-/*
- * Data
- */
-void data_init(void) {}
-
-void data_lo(void) {
-    // Transition from input with pull-up to output low via Hi-Z instead of output high
-    writePinLow(PS2_DATA_PIN);
-    setPinOutput(PS2_DATA_PIN);
-}
-
-void data_hi(void) { setPinInputHigh(PS2_DATA_PIN); }
-
-bool data_in(void) {
-    setPinInputHigh(PS2_DATA_PIN);
-    wait_us(1);
-    return readPin(PS2_DATA_PIN);
-}
diff --git a/tmk_core/protocol/ps2_io_chibios.c b/tmk_core/protocol/ps2_io_chibios.c
deleted file mode 100644
index 906d85d848..0000000000
--- a/tmk_core/protocol/ps2_io_chibios.c
+++ /dev/null
@@ -1,55 +0,0 @@
-#include <stdbool.h>
-#include "ps2_io.h"
-
-// chibiOS headers
-#include "ch.h"
-#include "hal.h"
-
-/* Check port settings for clock and data line */
-#if !(defined(PS2_CLOCK_PIN))
-#    error "PS/2 clock setting is required in config.h"
-#endif
-
-#if !(defined(PS2_DATA_PIN))
-#    error "PS/2 data setting is required in config.h"
-#endif
-
-/*
- * Clock
- */
-void clock_init(void) {}
-
-void clock_lo(void) {
-    palSetLineMode(PS2_CLOCK_PIN, PAL_MODE_OUTPUT_OPENDRAIN);
-    palWriteLine(PS2_CLOCK_PIN, PAL_LOW);
-}
-
-void clock_hi(void) {
-    palSetLineMode(PS2_CLOCK_PIN, PAL_MODE_OUTPUT_OPENDRAIN);
-    palWriteLine(PS2_CLOCK_PIN, PAL_HIGH);
-}
-
-bool clock_in(void) {
-    palSetLineMode(PS2_CLOCK_PIN, PAL_MODE_INPUT);
-    return palReadLine(PS2_CLOCK_PIN);
-}
-
-/*
- * Data
- */
-void data_init(void) {}
-
-void data_lo(void) {
-    palSetLineMode(PS2_DATA_PIN, PAL_MODE_OUTPUT_OPENDRAIN);
-    palWriteLine(PS2_DATA_PIN, PAL_LOW);
-}
-
-void data_hi(void) {
-    palSetLineMode(PS2_DATA_PIN, PAL_MODE_OUTPUT_OPENDRAIN);
-    palWriteLine(PS2_DATA_PIN, PAL_HIGH);
-}
-
-bool data_in(void) {
-    palSetLineMode(PS2_DATA_PIN, PAL_MODE_INPUT);
-    return palReadLine(PS2_DATA_PIN);
-}
diff --git a/tmk_core/protocol/ps2_mouse.c b/tmk_core/protocol/ps2_mouse.c
deleted file mode 100644
index 39251a6434..0000000000
--- a/tmk_core/protocol/ps2_mouse.c
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
-Copyright 2011,2013 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 <stdbool.h>
-
-#if defined(__AVR__)
-#    include <avr/io.h>
-#endif
-
-#include "ps2_mouse.h"
-#include "wait.h"
-#include "host.h"
-#include "timer.h"
-#include "print.h"
-#include "report.h"
-#include "debug.h"
-#include "ps2.h"
-
-/* ============================= MACROS ============================ */
-
-static report_mouse_t mouse_report = {};
-
-static inline void ps2_mouse_print_report(report_mouse_t *mouse_report);
-static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report);
-static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report);
-static inline void ps2_mouse_enable_scrolling(void);
-static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report);
-
-/* ============================= IMPLEMENTATION ============================ */
-
-/* supports only 3 button mouse at this time */
-void ps2_mouse_init(void) {
-    ps2_host_init();
-
-    wait_ms(PS2_MOUSE_INIT_DELAY);  // wait for powering up
-
-    PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset");
-
-    PS2_MOUSE_RECEIVE("ps2_mouse_init: read BAT");
-    PS2_MOUSE_RECEIVE("ps2_mouse_init: read DevID");
-
-#ifdef PS2_MOUSE_USE_REMOTE_MODE
-    ps2_mouse_set_remote_mode();
-#else
-    ps2_mouse_enable_data_reporting();
-#endif
-
-#ifdef PS2_MOUSE_ENABLE_SCROLLING
-    ps2_mouse_enable_scrolling();
-#endif
-
-#ifdef PS2_MOUSE_USE_2_1_SCALING
-    ps2_mouse_set_scaling_2_1();
-#endif
-
-    ps2_mouse_init_user();
-}
-
-__attribute__((weak)) void ps2_mouse_init_user(void) {}
-
-__attribute__((weak)) void ps2_mouse_moved_user(report_mouse_t *mouse_report) {}
-
-void ps2_mouse_task(void) {
-    static uint8_t buttons_prev = 0;
-    extern int     tp_buttons;
-
-    /* receives packet from mouse */
-    uint8_t rcv;
-    rcv = ps2_host_send(PS2_MOUSE_READ_DATA);
-    if (rcv == PS2_ACK) {
-        mouse_report.buttons = ps2_host_recv_response() | tp_buttons;
-        mouse_report.x       = ps2_host_recv_response() * PS2_MOUSE_X_MULTIPLIER;
-        mouse_report.y       = ps2_host_recv_response() * PS2_MOUSE_Y_MULTIPLIER;
-#ifdef PS2_MOUSE_ENABLE_SCROLLING
-        mouse_report.v = -(ps2_host_recv_response() & PS2_MOUSE_SCROLL_MASK) * PS2_MOUSE_V_MULTIPLIER;
-#endif
-    } else {
-        if (debug_mouse) print("ps2_mouse: fail to get mouse packet\n");
-        return;
-    }
-
-    /* if mouse moves or buttons state changes */
-    if (mouse_report.x || mouse_report.y || mouse_report.v || ((mouse_report.buttons ^ buttons_prev) & PS2_MOUSE_BTN_MASK)) {
-#ifdef PS2_MOUSE_DEBUG_RAW
-        // Used to debug raw ps2 bytes from mouse
-        ps2_mouse_print_report(&mouse_report);
-#endif
-        buttons_prev = mouse_report.buttons;
-        ps2_mouse_convert_report_to_hid(&mouse_report);
-#if PS2_MOUSE_SCROLL_BTN_MASK
-        ps2_mouse_scroll_button_task(&mouse_report);
-#endif
-        if (mouse_report.x || mouse_report.y || mouse_report.v) {
-            ps2_mouse_moved_user(&mouse_report);
-        }
-#ifdef PS2_MOUSE_DEBUG_HID
-        // Used to debug the bytes sent to the host
-        ps2_mouse_print_report(&mouse_report);
-#endif
-        host_mouse_send(&mouse_report);
-    }
-
-    ps2_mouse_clear_report(&mouse_report);
-}
-
-void ps2_mouse_disable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_DISABLE_DATA_REPORTING, "ps2 mouse disable data reporting"); }
-
-void ps2_mouse_enable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_ENABLE_DATA_REPORTING, "ps2 mouse enable data reporting"); }
-
-void ps2_mouse_set_remote_mode(void) {
-    PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_REMOTE_MODE, "ps2 mouse set remote mode");
-    ps2_mouse_mode = PS2_MOUSE_REMOTE_MODE;
-}
-
-void ps2_mouse_set_stream_mode(void) {
-    PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_STREAM_MODE, "ps2 mouse set stream mode");
-    ps2_mouse_mode = PS2_MOUSE_STREAM_MODE;
-}
-
-void ps2_mouse_set_scaling_2_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_2_1, "ps2 mouse set scaling 2:1"); }
-
-void ps2_mouse_set_scaling_1_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_1_1, "ps2 mouse set scaling 1:1"); }
-
-void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_RESOLUTION, resolution, "ps2 mouse set resolution"); }
-
-void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_SAMPLE_RATE, sample_rate, "ps2 mouse set sample rate"); }
-
-/* ============================= HELPERS ============================ */
-
-#define X_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_X_SIGN))
-#define Y_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_Y_SIGN))
-#define X_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_X_OVFLW))
-#define Y_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_Y_OVFLW))
-static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report) {
-    // PS/2 mouse data is '9-bit integer'(-256 to 255) which is comprised of sign-bit and 8-bit value.
-    // bit: 8    7 ... 0
-    //      sign \8-bit/
-    //
-    // Meanwhile USB HID mouse indicates 8bit data(-127 to 127), note that -128 is not used.
-    //
-    // This converts PS/2 data into HID value. Use only -127-127 out of PS/2 9-bit.
-    mouse_report->x = X_IS_NEG ? ((!X_IS_OVF && -127 <= mouse_report->x && mouse_report->x <= -1) ? mouse_report->x : -127) : ((!X_IS_OVF && 0 <= mouse_report->x && mouse_report->x <= 127) ? mouse_report->x : 127);
-    mouse_report->y = Y_IS_NEG ? ((!Y_IS_OVF && -127 <= mouse_report->y && mouse_report->y <= -1) ? mouse_report->y : -127) : ((!Y_IS_OVF && 0 <= mouse_report->y && mouse_report->y <= 127) ? mouse_report->y : 127);
-
-#ifdef PS2_MOUSE_INVERT_BUTTONS
-    // swap left & right buttons
-    uint8_t needs_left = mouse_report->buttons & PS2_MOUSE_BTN_RIGHT;
-    uint8_t needs_right = mouse_report->buttons & PS2_MOUSE_BTN_LEFT;
-    mouse_report->buttons = (mouse_report->buttons & ~(PS2_MOUSE_BTN_MASK)) | (needs_left ? PS2_MOUSE_BTN_LEFT : 0) | (needs_right ? PS2_MOUSE_BTN_RIGHT : 0);
-#else
-    // remove sign and overflow flags
-    mouse_report->buttons &= PS2_MOUSE_BTN_MASK;
-#endif
-
-#ifdef PS2_MOUSE_INVERT_X
-    mouse_report->x = -mouse_report->x;
-#endif
-#ifndef PS2_MOUSE_INVERT_Y  // NOTE if not!
-    // invert coordinate of y to conform to USB HID mouse
-    mouse_report->y = -mouse_report->y;
-#endif
-
-#ifdef PS2_MOUSE_ROTATE
-    int8_t x = mouse_report->x;
-    int8_t y = mouse_report->y;
-#    if PS2_MOUSE_ROTATE == 90
-    mouse_report->x = y;
-    mouse_report->y = -x;
-#    elif PS2_MOUSE_ROTATE == 180
-    mouse_report->x = -x;
-    mouse_report->y = -y;
-#    elif PS2_MOUSE_ROTATE == 270
-    mouse_report->x = -y;
-    mouse_report->y = x;
-#    endif
-#endif
-}
-
-static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report) {
-    mouse_report->x       = 0;
-    mouse_report->y       = 0;
-    mouse_report->v       = 0;
-    mouse_report->h       = 0;
-    mouse_report->buttons = 0;
-}
-
-static inline void ps2_mouse_print_report(report_mouse_t *mouse_report) {
-    if (!debug_mouse) return;
-    print("ps2_mouse: [");
-    print_hex8(mouse_report->buttons);
-    print("|");
-    print_hex8((uint8_t)mouse_report->x);
-    print(" ");
-    print_hex8((uint8_t)mouse_report->y);
-    print(" ");
-    print_hex8((uint8_t)mouse_report->v);
-    print(" ");
-    print_hex8((uint8_t)mouse_report->h);
-    print("]\n");
-}
-
-static inline void ps2_mouse_enable_scrolling(void) {