[Keyboard] Adapt downsteam Ghost Squid support to latest QMK (#14607)

Co-authored-by: fenuks <fenuks>

1 files changed, 97 insertions, 0 deletions

diff --git a/keyboards/bpiphany/ghost_squid/matrix.c b/keyboards/bpiphany/ghost_squid/matrix.c
new file mode 100644
index 0000000000..b0ad607555
--- /dev/null
+++ b/keyboards/bpiphany/ghost_squid/matrix.c
@@ -0,0 +1,97 @@
+/*
+  Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+  Copyright 2016 Daniel Svensson <dsvensson@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 "matrix.h"
+#include "quantum.h"
+
+matrix_row_t read_rows(void) {
+    return
+        (PINB & (1 << 1) ? 0 : ((matrix_row_t)1 << 0)) |
+        (PINC & (1 << 2) ? 0 : ((matrix_row_t)1 << 1)) |
+        (PINB & (1 << 6) ? 0 : ((matrix_row_t)1 << 2)) |
+        (PINB & (1 << 4) ? 0 : ((matrix_row_t)1 << 3)) |
+        (PINB & (1 << 3) ? 0 : ((matrix_row_t)1 << 4)) |
+        (PINB & (1 << 2) ? 0 : ((matrix_row_t)1 << 5)) |
+        (PINB & (1 << 0) ? 0 : ((matrix_row_t)1 << 6)) |
+        (PINB & (1 << 5) ? 0 : ((matrix_row_t)1 << 7));
+}
+
+void select_col(uint8_t col) {
+    switch (col) {
+        case  0: PORTD = (PORTD & ~0b01111110) | 0b01100010; break;
+        case  1: PORTD = (PORTD & ~0b01111110) | 0b01101000; break;
+        case  2: PORTD = (PORTD & ~0b01111110) | 0b01101100; break;
+        case  3: PORTD = (PORTD & ~0b01111110) | 0b01110000; break;
+        case  4: PORTD = (PORTD & ~0b01111110) | 0b01111000; break;
+        case  5: PORTD = (PORTD & ~0b01111110) | 0b01100000; break;
+        case  6: PORTD = (PORTD & ~0b01111110) | 0b01110100; break;
+        case  7: PORTD = (PORTD & ~0b01111110) | 0b01100100; break;
+        case  8: PORTD = (PORTD & ~0b01111110) | 0b01111100; break;
+        case  9: PORTD = (PORTD & ~0b01111110) | 0b01101010; break;
+        case 10: PORTD = (PORTD & ~0b01111110) | 0b00110110; break;
+        case 11: PORTD = (PORTD & ~0b01111110) | 0b00010110; break;
+        case 12: PORTD = (PORTD & ~0b01111110) | 0b01001110; break;
+        case 13: PORTD = (PORTD & ~0b01111110) | 0b00111110; break;
+        case 14: PORTD = (PORTD & ~0b01111110) | 0b00011110; break;
+        case 15: PORTD = (PORTD & ~0b01111110) | 0b01000110; break;
+        case 16: PORTD = (PORTD & ~0b01111110) | 0b00100110; break;
+        case 17: PORTD = (PORTD & ~0b01111110) | 0b00101110; break;
+    }
+}
+
+void matrix_init_custom(void) {
+    /* Column output pins */
+    setPinOutput(D1);
+    setPinOutput(D2);
+    setPinOutput(D3);
+    setPinOutput(D4);
+    setPinOutput(D5);
+    setPinOutput(D6);
+
+    /* Row input pins */
+    writePinHigh(B0);
+    writePinHigh(B1);
+    writePinHigh(B2);
+    writePinHigh(B3);
+    writePinHigh(B4);
+    writePinHigh(B5);
+    writePinHigh(B6);
+    writePinHigh(C2);
+}
+
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+    bool changed = false;
+
+    for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+        select_col(col);
+        matrix_io_delay();
+        matrix_row_t rows = read_rows();
+
+        for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+            bool prev_bit = current_matrix[row] & ((matrix_row_t)1 << col);
+            bool curr_bit = rows & (1 << row);
+
+            if (prev_bit != curr_bit) {
+                current_matrix[row] ^= (matrix_row_t)1 << col;
+                changed = true;
+            }
+        }
+    }
+
+    return changed;
+}