[Keyboard] add support for ModelM USB board (#9846)

* add support for ModelM USB board

* EMI improvement: remove unnecessary toggling of MOSI pin

* address review comments

* Update keyboards/mschwingen/modelm/rules.mk

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/mschwingen/modelm/rules.mk

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/mschwingen/modelm/config.h

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/mschwingen/modelm/config.h

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/mschwingen/modelm/rules.mk

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/mschwingen/modelm/keymaps/default/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* update printf usage

* add comment

* EMI improvement: remove unnecessary toggling of MOSI signal

* remove trailing space

* use shorter macros as suggested in review by noroadsleft, re-format table to line up columns

* Update keyboards/mschwingen/modelm/config.h

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mschwingen/modelm/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mschwingen/modelm/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mschwingen/modelm/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mschwingen/modelm/README.md

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mschwingen/modelm/README.md

Co-authored-by: Ryan <fauxpark@gmail.com>

* Apply suggestions from code review

use spi_read from core insteads of our own copy

Co-authored-by: Ryan <fauxpark@gmail.com>

* include spi_master.c to use spi_read()

* Update keyboards/mschwingen/modelm/README.md

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Apply suggestions from code review: correct indenting in keymap

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Apply suggestions from code review

use automatic variant defines from makefile instead of defining our own

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/mschwingen/modelm/rules.mk: use QUANTUM_LIB_SRC for uart.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

Co-authored-by: Michael Schwingen <michael@schwingen.org>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/mschwingen/modelm/config.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2020 Michael Schwingen
+
+ * 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/>.
+ */
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x558E
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    mschwingen
+#define PRODUCT         IBM Model M 101/102
+
+/* key matrix size */
+#define MATRIX_ROWS 16
+#define MATRIX_COLS 8
+
+/* pins for external shift registers */
+#define SR_LOAD_PIN B0
+#define SR_CLK_PIN B1
+#define SR_DIN_PIN B3
+#define SR_DOUT_PIN B2
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed (5 is default) */
+#define DEBOUNCE 5
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+#define NORMAL_PRINT
+//#define USER_PRINT
+
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
+
+//#define DEBUG_MATRIX_SCAN_RATE
+#define DYNAMIC_MACRO_NO_NESTING
+
+#define QMK_LED E6
+
+#define MODELM_LED1 B5
+#define MODELM_LED2 B6
+#define MODELM_LED3 D0
+
+#if defined(KEYBOARD_mschwingen_modelm_led_wired)
+# define MODELM_LED_CAPSLOCK  MODELM_LED1
+# define MODELM_LED_SCROLLOCK MODELM_LED2
+# define MODELM_LED_NUMLOCK   MODELM_LED3
+#elif defined(KEYBOARD_mschwingen_modelm_led_ffc)
+# define MODELM_LED_CAPSLOCK  MODELM_LED2
+# define MODELM_LED_SCROLLOCK MODELM_LED3
+# define MODELM_LED_NUMLOCK   MODELM_LED1
+#elif defined(KEYBOARD_mschwingen_modelm_led_ws2812)
+#else
+# error one of MODELM_LEDS_FFC, MODELM_LEDS_WIRED or MODELM_LEDS_WS2812 must be set!
+#endif
+
+// 3* WS2812 LEDs instead of singlecolor GPIO LEDs
+#define RGB_DI_PIN B6
+#define RGBLED_NUM 3
+
+// disabled, needs PCB patch.
+//#define C6_AUDIO
+//#define NO_MUSIC_MODE