1 files changed, 0 insertions, 166 deletions

diff --git a/tmk_core/protocol/xt_interrupt.c b/tmk_core/protocol/xt_interrupt.c
deleted file mode 100644
index ba9d71848..000000000
--- a/tmk_core/protocol/xt_interrupt.c
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
-Copyright 2018 Jun WAKO <wakojun@gmail.com>
-Copyright 2016 Ethan Apodaca <papodaca@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.
-*/
-
-#include <stdbool.h>
-#include <avr/interrupt.h>
-#include "xt.h"
-#include "wait.h"
-#include "debug.h"
-
-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);
-
-void xt_host_init(void) {
-    XT_INT_INIT();
-    XT_INT_OFF();
-
-    /* hard reset */
-#ifdef XT_RESET
-    XT_RESET();
-#endif
-
-    /* soft reset: pull clock line down for 20ms */
-    XT_DATA_LO();
-    XT_CLOCK_LO();
-    wait_ms(20);
-
-    /* input mode with pullup */
-    XT_CLOCK_IN();
-    XT_DATA_IN();
-
-    XT_INT_ON();
-}
-
-/* get data received by interrupt */
-uint8_t xt_host_recv(void) {
-    if (pbuf_has_data()) {
-        return pbuf_dequeue();
-    } else {
-        return 0;
-    }
-}
-
-ISR(XT_INT_VECT) {
-    /*
-     * XT signal format consits of 10 or 9 clocks and sends start bits and 8-bit data,
-     * which should be read on falling edge of clock.
-     *
-     *  start(0), start(1), bit0, bit1, bit2, bit3, bit4, bit5, bit6, bit7
-     *
-     * Original IBM XT keyboard sends start(0) bit while some of clones don't.
-     * Start(0) bit is read as low on data line while start(1) as high.
-     *
-     * https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol
-     */
-    static enum { START, BIT0, BIT1, BIT2, BIT3, BIT4, BIT5, BIT6, BIT7 } state = START;
-    static uint8_t data                                                         = 0;
-
-    uint8_t dbit = XT_DATA_READ();
-
-    // This is needed if using PCINT which can be called on both falling and rising edge
-    // if (XT_CLOCK_READ()) return;
-
-    switch (state) {
-        case START:
-            // ignore start(0) bit
-            if (!dbit) return;
-            break;
-        case BIT0 ... BIT7:
-            data >>= 1;
-            if (dbit) data |= 0x80;
-            break;
-    }
-    if (state++ == BIT7) {
-        pbuf_enqueue(data);
-        state = START;
-        data  = 0;
-    }
-    return;
-}
-
-/*--------------------------------------------------------------------
- * 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) {
-    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 {
-        dprintf("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;
-}
-
-static inline bool pbuf_has_data(void) {
-    uint8_t sreg = SREG;
-    cli();
-    bool has_data = (pbuf_head != pbuf_tail);
-    SREG          = sreg;
-    return has_data;
-}
-
-static inline void pbuf_clear(void) {
-    uint8_t sreg = SREG;
-    cli();
-    pbuf_head = pbuf_tail = 0;
-    SREG                  = sreg;
-}