From bd5f323bec8f5bd309eb570a65685f23f44654a3 Mon Sep 17 00:00:00 2001
From: Priyadi Iman Nurcahyo <priyadi@priyadi.net>
Date: Wed, 14 Dec 2016 16:21:01 +0700
Subject: IBM Terminal M-122 converter support

Code ported from TMK to QMK.
---
 keyboards/converter/ibm_terminal/matrix.c | 232 ++++++++++++++++++++++++++++++
 1 file changed, 232 insertions(+)
 create mode 100644 keyboards/converter/ibm_terminal/matrix.c

(limited to 'keyboards/converter/ibm_terminal/matrix.c')

diff --git a/keyboards/converter/ibm_terminal/matrix.c b/keyboards/converter/ibm_terminal/matrix.c
new file mode 100644
index 000000000..c0b5971c3
--- /dev/null
+++ b/keyboards/converter/ibm_terminal/matrix.c
@@ -0,0 +1,232 @@
+/*
+Copyright 2011 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 <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "util.h"
+#include "debug.h"
+#include "ps2.h"
+#include "matrix.h"
+
+#define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
+#define print_matrix_header()  print("\nr/c 01234567\n")
+#define matrix_bitpop(i)       bitpop(matrix[i])
+#define ROW_SHIFTER ((uint8_t)1)
+
+
+static void matrix_make(uint8_t code);
+static void matrix_break(uint8_t code);
+
+
+/*
+ * Matrix Array usage:
+ * 'Scan Code Set 3' is assigned into 17x8 cell matrix.
+ *
+ *    8bit wide
+ *   +---------+
+ *  0|         |
+ *  :|         | 0x00-0x87
+ *  ;|         |
+ * 17|         |
+ *   +---------+
+ */
+static uint8_t matrix[MATRIX_ROWS];
+#define ROW(code)      (code>>3)
+#define COL(code)      (code&0x07)
+
+
+void matrix_init(void)
+{
+    debug_enable = true;
+    //debug_matrix = true;
+    //debug_keyboard = true;
+    //debug_mouse = false;
+
+    ps2_host_init();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
+
+    return;
+}
+
+uint8_t matrix_scan(void)
+{
+
+    // scan code reading states
+    static enum {
+        RESET,
+        RESET_RESPONSE,
+        KBD_ID0,
+        KBD_ID1,
+        CONFIG,
+        READY,
+        F0,
+    } state = RESET;
+
+    uint8_t code;
+    if ((code = ps2_host_recv())) {
+        debug("r"); debug_hex(code); debug(" ");
+    }
+
+    switch (state) {
+        case RESET:
+            debug("wFF ");
+            if (ps2_host_send(0xFF) == 0xFA) {
+                debug("[ack]\nRESET_RESPONSE: ");
+                state = RESET_RESPONSE;
+            }
+            break;
+        case RESET_RESPONSE:
+            if (code == 0xAA) {
+                debug("[ok]\nKBD_ID: ");
+                state = KBD_ID0;
+            } else if (code) {
+                debug("err\nRESET: ");
+                state = RESET;
+            }
+            break;
+        // after reset receive keyboad ID(2 bytes)
+        case KBD_ID0:
+            if (code) {
+                state = KBD_ID1;
+            }
+            break;
+        case KBD_ID1:
+            if (code) {
+                debug("\nCONFIG: ");
+                state = CONFIG;
+            }
+            break;
+        case CONFIG:
+            debug("wF8 ");
+            if (ps2_host_send(0xF8) == 0xFA) {
+                debug("[ack]\nREADY\n");
+                state = READY;
+            }
+            break;
+        case READY:
+            switch (code) {
+                case 0x00:
+                    break;
+                case 0xF0:
+                    state = F0;
+                    debug(" ");
+                    break;
+                default:    // normal key make
+                    if (code < 0x88) {
+                        matrix_make(code);
+                    } else {
+                        debug("unexpected scan code at READY: "); debug_hex(code); debug("\n");
+                    }
+                    state = READY;
+                    debug("\n");
+            }
+            break;
+        case F0:    // Break code
+            switch (code) {
+                case 0x00:
+                    break;
+                default:
+                    if (code < 0x88) {
+                        matrix_break(code);
+                    } else {
+                        debug("unexpected scan code at F0: "); debug_hex(code); debug("\n");
+                    }
+                    state = READY;
+                    debug("\n");
+            }
+            break;
+    }
+    return 1;
+}
+
+inline
+uint8_t matrix_get_row(uint8_t row)
+{
+    return matrix[row];
+}
+
+inline
+static void matrix_make(uint8_t code)
+{
+    if (!matrix_is_on(ROW(code), COL(code))) {
+        matrix[ROW(code)] |= 1<<COL(code);
+    }
+}
+
+inline
+static void matrix_break(uint8_t code)
+{
+    if (matrix_is_on(ROW(code), COL(code))) {
+        matrix[ROW(code)] &= ~(1<<COL(code));
+    }
+}
+
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+    return (matrix_get_row(row) & (1<<col));
+}
+
+void matrix_print(void)
+{
+#if (MATRIX_COLS <= 8)
+    print("r/c 01234567\n");
+#elif (MATRIX_COLS <= 16)
+    print("r/c 0123456789ABCDEF\n");
+#elif (MATRIX_COLS <= 32)
+    print("r/c 0123456789ABCDEF0123456789ABCDEF\n");
+#endif
+
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+
+#if (MATRIX_COLS <= 8)
+        xprintf("%02X: %08b%s\n", row, bitrev(matrix_get_row(row)),
+#elif (MATRIX_COLS <= 16)
+        xprintf("%02X: %016b%s\n", row, bitrev16(matrix_get_row(row)),
+#elif (MATRIX_COLS <= 32)
+        xprintf("%02X: %032b%s\n", row, bitrev32(matrix_get_row(row)),
+#endif
+#ifdef MATRIX_HAS_GHOST
+        matrix_has_ghost_in_row(row) ?  " <ghost" : ""
+#else
+        ""
+#endif
+        );
+    }
+}
+
+#ifdef MATRIX_HAS_GHOST
+__attribute__ ((weak))
+bool matrix_has_ghost_in_row(uint8_t row)
+{
+    matrix_row_t matrix_row = matrix_get_row(row);
+    // No ghost exists when less than 2 keys are down on the row
+    if (((matrix_row - 1) & matrix_row) == 0)
+        return false;
+
+    // Ghost occurs when the row shares column line with other row
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        if (i != row && (matrix_get_row(i) & matrix_row))
+            return true;
+    }
+    return false;
+}
+#endif
-- 
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