Remove unreferenced IBM4704, Sony NEWS, NeXT keyboard code. (#14380)

1 files changed, 0 insertions, 185 deletions

diff --git a/tmk_core/protocol/ibm4704.c b/tmk_core/protocol/ibm4704.c
deleted file mode 100644
index a19443976..000000000
--- a/tmk_core/protocol/ibm4704.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
-Copyright 2010,2011,2012,2013 Jun WAKO <wakojun@gmail.com>
-*/
-#include <stdbool.h>
-#include <util/delay.h>
-#include "debug.h"
-#include "ring_buffer.h"
-#include "ibm4704.h"
-
-#define WAIT(stat, us, err)      \
-    do {                         \
-        if (!wait_##stat(us)) {  \
-            ibm4704_error = err; \
-            goto ERROR;          \
-        }                        \
-    } while (0)
-
-uint8_t ibm4704_error = 0;
-
-void ibm4704_init(void) {
-    inhibit();  // keep keyboard from sending
-    IBM4704_INT_INIT();
-    IBM4704_INT_ON();
-    idle();  // allow keyboard sending
-}
-
-/*
-Host to Keyboard
-----------------
-Data bits are LSB first and Parity is odd. Clock has around 60us high and 30us low part.
-
-        ____        __   __   __   __   __   __   __   __   __   ________
-Clock       \______/  \_/  \_/  \_/  \_/  \_/  \_/  \_/  \_/  \_/
-            ^   ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ___
-Data    ____|__/    X____X____X____X____X____X____X____X____X____X   \___
-            |  Start   0    1    2    3    4    5    6    7    P   Stop
-            Request by host
-
-Start bit:  can be long as 300-350us.
-Request:    Host pulls Clock line down to request to send a command.
-Timing:     After Request keyboard pull up Data and down Clock line to low for start bit.
-            After request host release Clock line once Data line becomes hi.
-            Host writes a bit while Clock is hi and Keyboard reads while low.
-Stop bit:   Host releases or pulls up Data line to hi after 9th clock and waits for keyboard pull down the line to lo.
-*/
-uint8_t ibm4704_send(uint8_t data) {
-    bool parity   = true;  // odd parity
-    ibm4704_error = 0;
-
-    IBM4704_INT_OFF();
-
-    /* Request to send */
-    idle();
-    clock_lo();
-
-    /* wait for Start bit(Clock:lo/Data:hi) */
-    WAIT(data_hi, 300, 0x30);
-
-    /* Data bit */
-    for (uint8_t i = 0; i < 8; i++) {
-        WAIT(clock_hi, 100, 0x40 + i);
-        if (data & (1 << i)) {
-            parity = !parity;
-            data_hi();
-        } else {
-            data_lo();
-        }
-        WAIT(clock_lo, 100, 0x48 + i);
-    }
-
-    /* Parity bit */
-    WAIT(clock_hi, 100, 0x34);
-    if (parity) {
-        data_hi();
-    } else {
-        data_lo();
-    }
-    WAIT(clock_lo, 100, 0x35);
-
-    /* Stop bit */
-    WAIT(clock_hi, 100, 0x34);
-    data_hi();
-
-    /* End */
-    WAIT(data_lo, 100, 0x36);
-
-    idle();
-    IBM4704_INT_ON();
-    return 0;
-ERROR:
-    idle();
-    if (ibm4704_error > 0x30) {
-        xprintf("S:%02X ", ibm4704_error);
-    }
-    IBM4704_INT_ON();
-    return -1;
-}
-
-/* wait forever to receive data */
-uint8_t ibm4704_recv_response(void) {
-    while (!rbuf_has_data()) {
-        _delay_ms(1);
-    }
-    return rbuf_dequeue();
-}
-
-uint8_t ibm4704_recv(void) {
-    if (rbuf_has_data()) {
-        return rbuf_dequeue();
-    } else {
-        return -1;
-    }
-}
-
-/*
-Keyboard to Host
-----------------
-Data bits are LSB first and Parity is odd. Clock has around 60us high and 30us low part.
-
-        ____       __   __   __   __   __   __   __   __   __   _______
-Clock       \_____/  \_/  \_/  \_/  \_/  \_/  \_/  \_/  \_/  \_/
-             ____ ____ ____ ____ ____ ____ ____ ____ ____ ____
-Data    ____/    X____X____X____X____X____X____X____X____X____X________
-            Start   0    1    2    3    4    5    6    7    P  Stop
-
-Start bit:  can be long as 300-350us.
-Inhibit:    Pull Data line down to inhibit keyboard to send.
-Timing:     Host reads bit while Clock is hi.(rising edge)
-Stop bit:   Keyboard pulls down Data line to lo after 9th clock.
-*/
-ISR(IBM4704_INT_VECT) {
-    static enum { BIT0, BIT1, BIT2, BIT3, BIT4, BIT5, BIT6, BIT7, PARITY, STOP } state = BIT0;
-    // LSB first
-    static uint8_t data = 0;
-    // Odd parity
-    static uint8_t parity = false;
-
-    ibm4704_error = 0;
-
-    switch (state) {
-        case BIT0:
-        case BIT1:
-        case BIT2:
-        case BIT3:
-        case BIT4:
-        case BIT5:
-        case BIT6:
-        case BIT7:
-            data >>= 1;
-            if (data_in()) {
-                data |= 0x80;
-                parity = !parity;
-            }
-            break;
-        case PARITY:
-            if (data_in()) {
-                parity = !parity;
-            }
-            if (!parity) goto ERROR;
-            break;
-        case STOP:
-            // Data:Low
-            WAIT(data_lo, 100, state);
-            if (!rbuf_enqueue(data)) {
-                print("rbuf: full\n");
-            }
-            ibm4704_error = IBM4704_ERR_NONE;
-            goto DONE;
-            break;
-        default:
-            goto ERROR;
-    }
-    state++;
-    goto RETURN;
-ERROR:
-    ibm4704_error = state;
-    while (ibm4704_send(0xFE)) _delay_ms(1);  // resend
-    xprintf("R:%02X%02X\n", state, data);
-DONE:
-    state  = BIT0;
-    data   = 0;
-    parity = false;
-RETURN:
-    return;
-}