Remove core library and build files

[qmk_firmware.git] / protocol / ps2_busywait.c

diff --git a/protocol/ps2_busywait.c b/protocol/ps2_busywait.c
deleted file mode 100644 (file)
index a649332..0000000
--- a/protocol/ps2_busywait.c
+++ /dev/null
@@ -1,189 +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);
-}