Implement GPIO abstraction for atsam (#13567)

* Implement GPIO abstraction for atsam

* Convert Drop boards to normal matrix config

* Work round pin conflicts and matrix delay

keyboards/massdrop/alt/alt.c

@@ -0,0 +1,21 @@
+/*
+Copyright 2021 Massdrop Inc.
+
+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 "alt.h"
+
+/* Temporary solution for matrix delay */
+void matrix_output_select_delay(void) { matrix_io_delay(); }
+void matrix_output_unselect_delay(void) { }

keyboards/massdrop/alt/config.h

@@ -32,18 +32,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 5
 #define MATRIX_COLS 15
 
+
+#define MATRIX_ROW_PINS { A00, A01, A02, A03, A04 }
+#define MATRIX_COL_PINS { B04, B05, B06, B07, B08, B09, B10, B11, B12, B13, A05, A06, A07, A10, A11 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Temporary solution for matrix delay */
+#define IGNORE_ATOMIC_BLOCK
+
 /* MCU Port name definitions */
 #define PA 0
 #define PB 1
 
-/* Port and Pin definition of key row hardware configuration */
-#define MATRIX_ROW_PORTS PA, PA, PA, PA, PA
-#define MATRIX_ROW_PINS   0,  1,  2,  3,  4
-
-/* Port and Pin definition of key column hardware configuration */
-#define MATRIX_COL_PORTS PB, PB, PB, PB, PB, PB, PB, PB, PB, PB, PA, PA, PA, PA, PA
-#define MATRIX_COL_PINS   4,  5,  6,  7,  8,  9, 10, 11, 12, 13,  5,  6,  7, 10, 11
-
 /* This Shift Register expands available hardware output lines to control additional peripherals */
 /* It uses four lines from the MCU to provide 16 output lines */
 /* Shift Register Clock configuration (MCU to ShiftRegister.RCLK) */

keyboards/massdrop/alt/rules.mk

@@ -1,13 +1,10 @@
 # project specific files
-SRC = matrix.c
 SRC += config_led.c
 
 #For platform and packs
 ARM_ATSAM = SAMD51J18A
 MCU = cortex-m4
 
-CUSTOM_MATRIX = lite
-
 # Build Options
 #   comment out to disable the options.
 #

keyboards/massdrop/ctrl/config.h

@@ -32,18 +32,20 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 11
 #define MATRIX_COLS 8
 
+#define MATRIX_ROW_PINS { B04, B05, B06, B07, B08, B09, A10, A11, B10, B11, B12 }
+#define MATRIX_COL_PINS { A00, A01, A02, A03, A04, A05, A06, A07 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Temporary solution for matrix delay */
+#define IGNORE_ATOMIC_BLOCK
+
 /* MCU Port name definitions */
 #define PA 0
 #define PB 1
 
-/* Port and Pin definition of key row hardware configuration */
-#define MATRIX_ROW_PORTS PB, PB, PB, PB, PB, PB, PA, PA, PB, PB, PB
-#define MATRIX_ROW_PINS   4,  5,  6,  7,  8,  9, 10, 11, 10, 11, 12
-
-/* Port and Pin definition of key column hardware configuration */
-#define MATRIX_COL_PORTS PA, PA, PA, PA, PA, PA, PA, PA
-#define MATRIX_COL_PINS   0,  1,  2,  3,  4,  5,  6,  7
-
 /* This Shift Register expands available hardware output lines to control additional peripherals */
 /* It uses four lines from the MCU to provide 16 output lines */
 /* Shift Register Clock configuration (MCU to ShiftRegister.RCLK) */

keyboards/massdrop/ctrl/ctrl.c

@@ -0,0 +1,21 @@
+/*
+Copyright 2021 Massdrop Inc.
+
+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 "ctrl.h"
+
+/* Temporary solution for matrix delay */
+void matrix_output_select_delay(void) { matrix_io_delay(); }
+void matrix_output_unselect_delay(void) { }

keyboards/massdrop/ctrl/rules.mk

@@ -1,13 +1,10 @@
 # project specific files
-SRC = matrix.c
 SRC += config_led.c
 
 #For platform and packs
 ARM_ATSAM = SAMD51J18A
 MCU = cortex-m4
 
-CUSTOM_MATRIX = lite
-
 # Build Options
 #   comment out to disable the options.
 #

tmk_core/common/arm_atsam/atomic_util.h

@@ -0,0 +1,37 @@
+/* Copyright 2021 QMK
+ *
+ * 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 3 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/>.
+ */
+#pragma once
+
+#include "samd51j18a.h"
+
+static __inline__ uint8_t __interrupt_disable__(void) {
+    __disable_irq();
+
+    return 1;
+}
+
+static __inline__ void __interrupt_enable__(const uint8_t *__s) {
+    __enable_irq();
+
+    __asm__ volatile("" ::: "memory");
+    (void)__s;
+}
+
+#define ATOMIC_BLOCK(type) for (type, __ToDo = __interrupt_disable__(); __ToDo; __ToDo = 0)
+#define ATOMIC_FORCEON uint8_t sreg_save __attribute__((__cleanup__(__interrupt_enable__))) = 0
+
+#define ATOMIC_BLOCK_RESTORESTATE _Static_assert(0, "ATOMIC_BLOCK_RESTORESTATE not implemented")
+#define ATOMIC_BLOCK_FORCEON ATOMIC_BLOCK(ATOMIC_FORCEON)

tmk_core/common/arm_atsam/gpio.h

@@ -0,0 +1,71 @@
+/* Copyright 2021 QMK
+ *
+ * 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 3 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/>.
+ */
+#pragma once
+
+#include "stdint.h"
+#include "samd51j18a.h"
+
+#include "pin_defs.h"
+
+typedef uint8_t pin_t;
+
+#define SAMD_PORT(pin) ((pin & 0x20) >> 5)
+#define SAMD_PIN(pin) (pin & 0x1f)
+#define SAMD_PIN_MASK(pin) (1 << (pin & 0x1f))
+
+#define setPinInput(pin)                                                                 \
+    do {                                                                                 \
+        PORT->Group[SAMD_PORT(pin)].PINCFG[SAMD_PIN(pin)].bit.INEN = 1;                  \
+        PORT->Group[SAMD_PORT(pin)].DIRCLR.reg                     = SAMD_PIN_MASK(pin); \
+    } while (0)
+
+#define setPinInputHigh(pin)                                                               \
+    do {                                                                                   \
+        PORT->Group[SAMD_PORT(pin)].DIRCLR.reg                       = SAMD_PIN_MASK(pin); \
+        PORT->Group[SAMD_PORT(pin)].OUTSET.reg                       = SAMD_PIN_MASK(pin); \
+        PORT->Group[SAMD_PORT(pin)].PINCFG[SAMD_PIN(pin)].bit.INEN   = 1;                  \
+        PORT->Group[SAMD_PORT(pin)].PINCFG[SAMD_PIN(pin)].bit.PULLEN = 1;                  \
+    } while (0)
+
+#define setPinInputLow(pin)                                                                \
+    do {                                                                                   \
+        PORT->Group[SAMD_PORT(pin)].DIRCLR.reg                       = SAMD_PIN_MASK(pin); \
+        PORT->Group[SAMD_PORT(pin)].OUTCLR.reg                       = SAMD_PIN_MASK(pin); \
+        PORT->Group[SAMD_PORT(pin)].PINCFG[SAMD_PIN(pin)].bit.INEN   = 1;                  \
+        PORT->Group[SAMD_PORT(pin)].PINCFG[SAMD_PIN(pin)].bit.PULLEN = 1;                  \
+    } while (0)
+
+#define setPinOutput(pin)                                            \
+    do {                                                             \
+        PORT->Group[SAMD_PORT(pin)].DIRSET.reg = SAMD_PIN_MASK(pin); \
+        PORT->Group[SAMD_PORT(pin)].OUTCLR.reg = SAMD_PIN_MASK(pin); \
+    } while (0)
+
+#define writePinHigh(pin)                                            \
+    do {                                                             \
+        PORT->Group[SAMD_PORT(pin)].OUTSET.reg = SAMD_PIN_MASK(pin); \
+    } while (0)
+
+#define writePinLow(pin)                                             \
+    do {                                                             \
+        PORT->Group[SAMD_PORT(pin)].OUTCLR.reg = SAMD_PIN_MASK(pin); \
+    } while (0)
+
+#define writePin(pin, level) ((level) ? (writePinHigh(pin)) : (writePinLow(pin)))
+
+#define readPin(pin) ((PORT->Group[SAMD_PORT(pin)].IN.reg & SAMD_PIN_MASK(pin)) != 0)
+
+#define togglePin(pin) (PORT->Group[SAMD_PORT(pin)].OUTTGL.reg = SAMD_PIN_MASK(pin))