57 files changed, 570 insertions, 287 deletions

diff --git a/common_features.mk b/common_features.mk
index 8c9d0a90c..bdde278b9 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -422,10 +422,6 @@ ifeq ($(strip $(TERMINAL_ENABLE)), yes)
     OPT_DEFS += -DUSER_PRINT
 endif
 
-ifeq ($(strip $(USB_HID_ENABLE)), yes)
-    include $(TMK_DIR)/protocol/usb_hid.mk
-endif
-
 ifeq ($(strip $(WPM_ENABLE)), yes)
     SRC += $(QUANTUM_DIR)/wpm.c
     OPT_DEFS += -DWPM_ENABLE
@@ -459,6 +455,23 @@ ifeq ($(strip $(DIP_SWITCH_ENABLE)), yes)
     SRC += $(QUANTUM_DIR)/dip_switch.c
 endif
 
+VALID_MAGIC_TYPES := yes full lite
+BOOTMAGIC_ENABLE ?= no
+ifneq ($(strip $(BOOTMAGIC_ENABLE)), no)
+  ifeq ($(filter $(BOOTMAGIC_ENABLE),$(VALID_MAGIC_TYPES)),)
+    $(error BOOTMAGIC_ENABLE="$(BOOTMAGIC_ENABLE)" is not a valid type of magic)
+  endif
+  ifeq ($(strip $(BOOTMAGIC_ENABLE)), lite)
+      OPT_DEFS += -DBOOTMAGIC_LITE
+      QUANTUM_SRC += $(QUANTUM_DIR)/bootmagic/bootmagic_lite.c
+  else
+    OPT_DEFS += -DBOOTMAGIC_ENABLE
+    QUANTUM_SRC += $(QUANTUM_DIR)/bootmagic/bootmagic_full.c
+  endif
+endif
+COMMON_VPATH += $(QUANTUM_DIR)/bootmagic
+QUANTUM_SRC += $(QUANTUM_DIR)/bootmagic/magic.c
+
 VALID_CUSTOM_MATRIX_TYPES:= yes lite no
 
 CUSTOM_MATRIX ?= no
diff --git a/docs/keycodes.md b/docs/keycodes.md
index 9acf8b683..f3c519b13 100644
--- a/docs/keycodes.md
+++ b/docs/keycodes.md
@@ -516,6 +516,9 @@ See also: [One Shot Keys](one_shot_keys.md)
 |------------|----------------------------------|
 |`OSM(mod)`  |Hold `mod` for one keypress       |
 |`OSL(layer)`|Switch to `layer` for one keypress|
+|`OS_ON`     |Turns One Shot keys on            |
+|`OS_OFF`    |Turns One Shot keys off           |
+|`OS_TOGG`   |Toggles One Shot keys status      |
 
 ## Space Cadet :id=space-cadet
 
diff --git a/docs/one_shot_keys.md b/docs/one_shot_keys.md
index 9a082d7d6..9fc548629 100644
--- a/docs/one_shot_keys.md
+++ b/docs/one_shot_keys.md
@@ -17,6 +17,9 @@ You can control the behavior of one shot keys by defining these in `config.h`:
 
 * `OSM(mod)` - Momentarily hold down *mod*. You must use the `MOD_*` keycodes as shown in [Mod Tap](mod_tap.md), not the `KC_*` codes.
 * `OSL(layer)` - momentary switch to *layer*.
+* `OS_ON` - Turns on One Shot keys.
+* `OS_OFF` - Turns off One Shot keys. OSM act as regular mod keys, OSL act like `MO`.
+* `ON_TOGG` - Toggles the one shot key status.
 
 Sometimes, you want to activate a one-shot key as part of a macro or tap dance routine.  
 
diff --git a/keyboards/aeboards/ext65/rev2/config.h b/keyboards/aeboards/ext65/rev2/config.h
index 541f07ee9..dc1bfb71c 100644
--- a/keyboards/aeboards/ext65/rev2/config.h
+++ b/keyboards/aeboards/ext65/rev2/config.h
@@ -74,3 +74,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BACKLIGHT_LEVELS 6
 #define BACKLIGHT_BREATHING
 #define BREATHING_PERIOD 6
+
+#define SLEEP_LED_GPT_DRIVER GPTD1
diff --git a/keyboards/aeboards/ext65/rev2/halconf.h b/keyboards/aeboards/ext65/rev2/halconf.h
index 6e2f53640..9fa1eca60 100644
--- a/keyboards/aeboards/ext65/rev2/halconf.h
+++ b/keyboards/aeboards/ext65/rev2/halconf.h
@@ -27,5 +27,7 @@
 
 #define HAL_USE_SPI TRUE
 
+#define HAL_USE_GPT TRUE
+
 #include_next <halconf.h>
 
diff --git a/keyboards/aeboards/ext65/rev2/mcuconf.h b/keyboards/aeboards/ext65/rev2/mcuconf.h
index 26ce80615..43d53d4f2 100644
--- a/keyboards/aeboards/ext65/rev2/mcuconf.h
+++ b/keyboards/aeboards/ext65/rev2/mcuconf.h
@@ -32,3 +32,5 @@
 #undef STM32_SPI_USE_SPI2
 #define STM32_SPI_USE_SPI2 TRUE
 
+#undef STM32_GPT_USE_TIM1
+#define STM32_GPT_USE_TIM1 TRUE
diff --git a/keyboards/cannonkeys/an_c/rules.mk b/keyboards/cannonkeys/an_c/rules.mk
index 8ed2d0ead..7309744d1 100644
--- a/keyboards/cannonkeys/an_c/rules.mk
+++ b/keyboards/cannonkeys/an_c/rules.mk
@@ -11,7 +11,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 BACKLIGHT_ENABLE = yes
diff --git a/keyboards/cannonkeys/chimera65/rules.mk b/keyboards/cannonkeys/chimera65/rules.mk
index 4d940da78..a08f2fa49 100644
--- a/keyboards/cannonkeys/chimera65/rules.mk
+++ b/keyboards/cannonkeys/chimera65/rules.mk
@@ -11,7 +11,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 BACKLIGHT_ENABLE = yes
diff --git a/keyboards/cannonkeys/instant60/rules.mk b/keyboards/cannonkeys/instant60/rules.mk
index 0973ad954..e5ba2903b 100644
--- a/keyboards/cannonkeys/instant60/rules.mk
+++ b/keyboards/cannonkeys/instant60/rules.mk
@@ -10,7 +10,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 BACKLIGHT_ENABLE = yes
diff --git a/keyboards/cannonkeys/iron165/rules.mk b/keyboards/cannonkeys/iron165/rules.mk
index 3925458dd..9de75a614 100644
--- a/keyboards/cannonkeys/iron165/rules.mk
+++ b/keyboards/cannonkeys/iron165/rules.mk
@@ -9,7 +9,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 BACKLIGHT_ENABLE = yes
diff --git a/keyboards/cannonkeys/satisfaction75/rules.mk b/keyboards/cannonkeys/satisfaction75/rules.mk
index e3abea546..3861b4849 100644
--- a/keyboards/cannonkeys/satisfaction75/rules.mk
+++ b/keyboards/cannonkeys/satisfaction75/rules.mk
@@ -15,7 +15,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = no  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 ENCODER_ENABLE = yes
diff --git a/keyboards/cannonkeys/savage65/rules.mk b/keyboards/cannonkeys/savage65/rules.mk
index 8e1b984fd..2454573d2 100644
--- a/keyboards/cannonkeys/savage65/rules.mk
+++ b/keyboards/cannonkeys/savage65/rules.mk
@@ -11,7 +11,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 BACKLIGHT_ENABLE = yes
diff --git a/keyboards/cannonkeys/tmov2/rules.mk b/keyboards/cannonkeys/tmov2/rules.mk
index 9b29e8fd1..294c873ee 100644
--- a/keyboards/cannonkeys/tmov2/rules.mk
+++ b/keyboards/cannonkeys/tmov2/rules.mk
@@ -11,7 +11,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 BACKLIGHT_ENABLE = yes
diff --git a/keyboards/cannonkeys/tsukuyomi/rules.mk b/keyboards/cannonkeys/tsukuyomi/rules.mk
index ce881f198..4e7791a79 100644
--- a/keyboards/cannonkeys/tsukuyomi/rules.mk
+++ b/keyboards/cannonkeys/tsukuyomi/rules.mk
@@ -10,7 +10,7 @@ EXTRAKEY_ENABLE = yes       # Audio control and System control
 CONSOLE_ENABLE = yes        # Console for debug
 COMMAND_ENABLE = yes        # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = yes      # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 NKRO_ENABLE = yes           # USB Nkey Rollover
 BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
diff --git a/keyboards/daji/seis_cinco/rules.mk b/keyboards/daji/seis_cinco/rules.mk
index fa34092cd..768e50069 100644
--- a/keyboards/daji/seis_cinco/rules.mk
+++ b/keyboards/daji/seis_cinco/rules.mk
@@ -11,7 +11,7 @@ EXTRAKEY_ENABLE = yes       # Audio control and System control
 CONSOLE_ENABLE = no         # Console for debug
 COMMAND_ENABLE = no         # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = yes      # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 NKRO_ENABLE = yes           # USB Nkey Rollover
 BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
diff --git a/keyboards/handwired/ck4x4/rules.mk b/keyboards/handwired/ck4x4/rules.mk
index 0709f341b..e5785270b 100644
--- a/keyboards/handwired/ck4x4/rules.mk
+++ b/keyboards/handwired/ck4x4/rules.mk
@@ -10,7 +10,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 CUSTOM_MATRIX = no # Custom matrix file
 
diff --git a/keyboards/handwired/onekey/rules.mk b/keyboards/handwired/onekey/rules.mk
index 259050d55..df2ec1ecf 100644
--- a/keyboards/handwired/onekey/rules.mk
+++ b/keyboards/handwired/onekey/rules.mk
@@ -7,9 +7,9 @@ EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 CONSOLE_ENABLE = yes        # Console for debug(+400)
 COMMAND_ENABLE = no         # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = yes       # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-NKRO_ENABLE = yes            # USB Nkey Rollover
+NKRO_ENABLE = yes           # USB Nkey Rollover
 BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 MIDI_ENABLE = no            # MIDI support (+2400 to 4200, depending on config)
diff --git a/keyboards/projectkb/alice/config.h b/keyboards/projectkb/alice/config.h
new file mode 100644
index 000000000..95fb682e1
--- /dev/null
+++ b/keyboards/projectkb/alice/config.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define SLEEP_LED_GPT_DRIVER GPTD1
diff --git a/keyboards/projectkb/alice/halconf.h b/keyboards/projectkb/alice/halconf.h
index b17808ffe..0016e53ba 100644
--- a/keyboards/projectkb/alice/halconf.h
+++ b/keyboards/projectkb/alice/halconf.h
@@ -27,5 +27,7 @@
 
 #define HAL_USE_SPI TRUE
 
+#define HAL_USE_GPT TRUE
+
 #include_next <halconf.h>
 
diff --git a/keyboards/projectkb/alice/mcuconf.h b/keyboards/projectkb/alice/mcuconf.h
index 4bfc7f946..6e0f1a50d 100644
--- a/keyboards/projectkb/alice/mcuconf.h
+++ b/keyboards/projectkb/alice/mcuconf.h
@@ -32,3 +32,5 @@
 #undef STM32_SPI_USE_SPI2
 #define STM32_SPI_USE_SPI2 TRUE
 
+#undef STM32_GPT_USE_TIM1
+#define STM32_GPT_USE_TIM1 TRUE
diff --git a/keyboards/projectkb/signature87/rules.mk b/keyboards/projectkb/signature87/rules.mk
index fe0d976d1..caad4c83c 100644
--- a/keyboards/projectkb/signature87/rules.mk
+++ b/keyboards/projectkb/signature87/rules.mk
@@ -9,7 +9,7 @@ MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes   # Audio control and System control
 CONSOLE_ENABLE = yes    # Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no   # Breathing sleep LED during USB suspend
 NKRO_ENABLE = yes           # USB Nkey Rollover
 BACKLIGHT_ENABLE = no
 
diff --git a/keyboards/ramonimbao/wete/config.h b/keyboards/ramonimbao/wete/config.h
index 5d68a7efd..3d8955009 100644
--- a/keyboards/ramonimbao/wete/config.h
+++ b/keyboards/ramonimbao/wete/config.h
@@ -46,6 +46,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLED_NUM 24
 #define RGBLIGHT_ANIMATIONS
 
+#define SLEEP_LED_GPT_DRIVER GPTD1
+
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/ramonimbao/wete/halconf.h b/keyboards/ramonimbao/wete/halconf.h
index c43440a45..b3de873be 100644
--- a/keyboards/ramonimbao/wete/halconf.h
+++ b/keyboards/ramonimbao/wete/halconf.h
@@ -23,5 +23,7 @@
 
 #define HAL_USE_PWM TRUE
 
+#define HAL_USE_GPT TRUE
+
 #include_next <halconf.h>
 
diff --git a/keyboards/ramonimbao/wete/mcuconf.h b/keyboards/ramonimbao/wete/mcuconf.h
index b7f2c481c..7a2e87776 100644
--- a/keyboards/ramonimbao/wete/mcuconf.h
+++ b/keyboards/ramonimbao/wete/mcuconf.h
@@ -35,3 +35,5 @@
 #undef STM32_SPI_USE_SPI2
 #define STM32_SPI_USE_SPI2 TRUE
 
+#undef STM32_GPT_USE_TIM1
+#define STM32_GPT_USE_TIM1 TRUE
diff --git a/keyboards/westfoxtrot/prophet/config.h b/keyboards/westfoxtrot/prophet/config.h
index 4f447e4ca..0f2ddc1dc 100644
--- a/keyboards/westfoxtrot/prophet/config.h
+++ b/keyboards/westfoxtrot/prophet/config.h
@@ -30,3 +30,5 @@
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
+
+#define SLEEP_LED_GPT_DRIVER GPTD1
diff --git a/keyboards/westfoxtrot/prophet/halconf.h b/keyboards/westfoxtrot/prophet/halconf.h
new file mode 100644
index 000000000..cbfd1307f
--- /dev/null
+++ b/keyboards/westfoxtrot/prophet/halconf.h
@@ -0,0 +1,27 @@
+/* Copyright 2020 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 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/>.
+ */
+
+/*
+ * This file was auto-generated by:
+ *    `qmk chibios-confmigrate -i keyboards/projectkb/alice/halconf.h -r platforms/chibios/common/configs/halconf.h`
+ */
+
+#pragma once
+
+#define HAL_USE_GPT TRUE
+
+#include_next <halconf.h>
+
diff --git a/keyboards/westfoxtrot/prophet/mcuconf.h b/keyboards/westfoxtrot/prophet/mcuconf.h
index 2665f9c9e..550141af6 100644
--- a/keyboards/westfoxtrot/prophet/mcuconf.h
+++ b/keyboards/westfoxtrot/prophet/mcuconf.h
@@ -23,6 +23,5 @@
 
 #include_next <mcuconf.h>
 
-#undef STM32_PWM_USE_TIM3
-#define STM32_PWM_USE_TIM3 TRUE
-
+#undef STM32_GPT_USE_TIM1
+#define STM32_GPT_USE_TIM1 TRUE
diff --git a/quantum/bootmagic/bootmagic.h b/quantum/bootmagic/bootmagic.h
new file mode 100644
index 000000000..959750178
--- /dev/null
+++ b/quantum/bootmagic/bootmagic.h
@@ -0,0 +1,24 @@
+/* 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
+
+#if defined(BOOTMAGIC_ENABLE)
+#    include "bootmagic_full.h"
+#elif defined(BOOTMAGIC_LITE)
+#    include "bootmagic_lite.h"
+#endif
+
+void bootmagic(void);
diff --git a/tmk_core/common/bootmagic.c b/quantum/bootmagic/bootmagic_full.c
index c1b3adf94..a7a0dcfcb 100644
--- a/tmk_core/common/bootmagic.c
+++ b/quantum/bootmagic/bootmagic_full.c
@@ -1,3 +1,18 @@
+/* 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/>.
+ */
 #include <stdint.h>
 #include <stdbool.h>
 #include "wait.h"
@@ -10,18 +25,35 @@
 #include "eeconfig.h"
 #include "bootmagic.h"
 
-keymap_config_t keymap_config;
-
-/** \brief Bootmagic
+/** \brief Scan Keycode
  *
  * FIXME: needs doc
  */
-void bootmagic(void) {
-    /* check signature */
-    if (!eeconfig_is_enabled()) {
-        eeconfig_init();
+static bool scan_keycode(uint8_t keycode) {
+    for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
+        matrix_row_t matrix_row = matrix_get_row(r);
+        for (uint8_t c = 0; c < MATRIX_COLS; c++) {
+            if (matrix_row & ((matrix_row_t)1 << c)) {
+                if (keycode == keymap_key_to_keycode(0, (keypos_t){.row = r, .col = c})) {
+                    return true;
+                }
+            }
+        }
     }
+    return false;
+}
+
+/** \brief Bootmagic Scan Keycode
+ *
+ * FIXME: needs doc
+ */
+static bool bootmagic_scan_keycode(uint8_t keycode) {
+    if (!scan_keycode(BOOTMAGIC_KEY_SALT)) return false;
+
+    return scan_keycode(keycode);
+}
 
+void bootmagic(void) {
     /* do scans in case of bounce */
     print("bootmagic scan: ... ");
     uint8_t scan = 100;
@@ -46,8 +78,6 @@ void bootmagic(void) {
         bootloader_jump();
     }
 
-    /* debug enable */
-    debug_config.raw = eeconfig_read_debug();
     if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEBUG_ENABLE)) {
         if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEBUG_MATRIX)) {
             debug_config.matrix = !debug_config.matrix;
@@ -61,8 +91,6 @@ void bootmagic(void) {
     }
     eeconfig_update_debug(debug_config.raw);
 
-    /* keymap config */
-    keymap_config.raw = eeconfig_read_keymap();
     if (bootmagic_scan_keycode(BOOTMAGIC_KEY_SWAP_CONTROL_CAPSLOCK)) {
         keymap_config.swap_control_capslock = !keymap_config.swap_control_capslock;
     }
@@ -93,71 +121,27 @@ void bootmagic(void) {
     uint8_t default_layer = 0;
     if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_0)) {
         default_layer |= (1 << 0);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_1)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_1)) {
         default_layer |= (1 << 1);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_2)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_2)) {
         default_layer |= (1 << 2);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_3)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_3)) {
         default_layer |= (1 << 3);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_4)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_4)) {
         default_layer |= (1 << 4);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_5)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_5)) {
         default_layer |= (1 << 5);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_6)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_6)) {
         default_layer |= (1 << 6);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_7)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_DEFAULT_LAYER_7)) {
         default_layer |= (1 << 7);
     }
-    if (default_layer) {
-        eeconfig_update_default_layer(default_layer);
-        default_layer_set((layer_state_t)default_layer);
-    } else {
-        default_layer = eeconfig_read_default_layer();
-        default_layer_set((layer_state_t)default_layer);
-    }
-    /* Also initialize layer state to trigger callback functions for layer_state */
-    layer_state_set_kb((layer_state_t)layer_state);
+    eeconfig_update_default_layer(default_layer);
 
     /* EE_HANDS handedness */
     if (bootmagic_scan_keycode(BOOTMAGIC_KEY_EE_HANDS_LEFT)) {
         eeconfig_update_handedness(true);
-    }
-    if (bootmagic_scan_keycode(BOOTMAGIC_KEY_EE_HANDS_RIGHT)) {
+    } else if (bootmagic_scan_keycode(BOOTMAGIC_KEY_EE_HANDS_RIGHT)) {
         eeconfig_update_handedness(false);
     }
 }
-
-/** \brief Scan Keycode
- *
- * FIXME: needs doc
- */
-static bool scan_keycode(uint8_t keycode) {
-    for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
-        matrix_row_t matrix_row = matrix_get_row(r);
-        for (uint8_t c = 0; c < MATRIX_COLS; c++) {
-            if (matrix_row & ((matrix_row_t)1 << c)) {
-                if (keycode == keymap_key_to_keycode(0, (keypos_t){.row = r, .col = c})) {
-                    return true;
-                }
-            }
-        }
-    }
-    return false;
-}
-
-/** \brief Bootmagic Scan Keycode
- *
- * FIXME: needs doc
- */
-bool bootmagic_scan_keycode(uint8_t keycode) {
-    if (!scan_keycode(BOOTMAGIC_KEY_SALT)) return false;
-
-    return scan_keycode(keycode);
-}
diff --git a/tmk_core/common/bootmagic.h b/quantum/bootmagic/bootmagic_full.h
index 8209d0194..28f914c1b 100644
--- a/tmk_core/common/bootmagic.h
+++ b/quantum/bootmagic/bootmagic_full.h
@@ -1,3 +1,19 @@
+/* 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
 
 /* FIXME: Add special doxygen comments for defines here. */
@@ -96,7 +112,4 @@
 #endif
 #ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_7
 #    define BOOTMAGIC_KEY_DEFAULT_LAYER_7 KC_7
-#endif
-
-void bootmagic(void);
-bool bootmagic_scan_keycode(uint8_t keycode);
+#endif
\ No newline at end of file
diff --git a/tmk_core/common/bootmagic_lite.c b/quantum/bootmagic/bootmagic_lite.c
index cbf756a17..9cbdcb0bb 100644
--- a/tmk_core/common/bootmagic_lite.c
+++ b/quantum/bootmagic/bootmagic_lite.c
@@ -1,3 +1,18 @@
+/* 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/>.
+ */
 #include "quantum.h"
 
 /** \brief Reset eeprom
@@ -47,3 +62,5 @@ __attribute__((weak)) void bootmagic_lite(void) {
         bootloader_jump();
     }
 }
+
+void bootmagic(void) { bootmagic_lite(); }
diff --git a/quantum/bootmagic/bootmagic_lite.h b/quantum/bootmagic/bootmagic_lite.h
new file mode 100644
index 000000000..17777e6b4
--- /dev/null
+++ b/quantum/bootmagic/bootmagic_lite.h
@@ -0,0 +1,25 @@
+/* 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
+
+#ifndef BOOTMAGIC_LITE_COLUMN
+#    define BOOTMAGIC_LITE_COLUMN 0
+#endif
+#ifndef BOOTMAGIC_LITE_ROW
+#    define BOOTMAGIC_LITE_ROW 0
+#endif
+
+void bootmagic_lite(void);
diff --git a/quantum/bootmagic/magic.c b/quantum/bootmagic/magic.c
new file mode 100644
index 000000000..f1cb11c39
--- /dev/null
+++ b/quantum/bootmagic/magic.c
@@ -0,0 +1,54 @@
+/* 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/>.
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include "wait.h"
+#include "matrix.h"
+#include "bootloader.h"
+#include "debug.h"
+#include "keymap.h"
+#include "host.h"
+#include "action_layer.h"
+#include "eeconfig.h"
+#include "bootmagic.h"
+
+keymap_config_t keymap_config;
+
+__attribute__((weak)) void bootmagic(void) {}
+
+/** \brief Magic
+ *
+ * FIXME: Needs doc
+ */
+void magic(void) {
+    /* check signature */
+    if (!eeconfig_is_enabled()) {
+        eeconfig_init();
+    }
+
+    /* init globals */
+    debug_config.raw  = eeconfig_read_debug();
+    keymap_config.raw = eeconfig_read_keymap();
+
+    bootmagic();
+
+    /* read here just incase bootmagic process changed its value */
+    layer_state_t default_layer = (layer_state_t)eeconfig_read_default_layer();
+    default_layer_set(default_layer);
+
+    /* Also initialize layer state to trigger callback functions for layer_state */
+    layer_state_set_kb((layer_state_t)layer_state);
+}
diff --git a/quantum/bootmagic/magic.h b/quantum/bootmagic/magic.h
new file mode 100644
index 000000000..2c3969b85
--- /dev/null
+++ b/quantum/bootmagic/magic.h
@@ -0,0 +1,18 @@
+/* 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
+
+void magic(void);
diff --git a/quantum/keycode_config.h b/quantum/keycode_config.h
index f878168c5..d7e334fdc 100644
--- a/quantum/keycode_config.h
+++ b/quantum/keycode_config.h
@@ -37,6 +37,7 @@ typedef union {
         bool nkro : 1;
         bool swap_lctl_lgui : 1;
         bool swap_rctl_rgui : 1;
+        bool oneshot_disable : 1;
     };
 } keymap_config_t;
 
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 80c4e8f00..78601ce6b 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -15,6 +15,7 @@
  */
 
 #include "quantum.h"
+#include "magic.h"
 
 #ifdef BLUETOOTH_ENABLE
 #    include "outputselect.h"
@@ -318,6 +319,17 @@ bool process_record_quantum(keyrecord_t *record) {
                 set_output(OUTPUT_BLUETOOTH);
                 return false;
 #endif
+#ifndef NO_ACTION_ONESHOT
+            case ONESHOT_TOGGLE:
+                oneshot_toggle();
+                break;
+            case ONESHOT_ENABLE:
+                oneshot_enable();
+                break;
+            case ONESHOT_DISABLE:
+                oneshot_disable();
+                break;
+#endif
         }
     }
 
@@ -369,12 +381,7 @@ void tap_random_base64(void) {
 }
 
 void matrix_init_quantum() {
-#ifdef BOOTMAGIC_LITE
-    bootmagic_lite();
-#endif
-    if (!eeconfig_is_enabled()) {
-        eeconfig_init();
-    }
+    magic();
 #if defined(LED_NUM_LOCK_PIN) || defined(LED_CAPS_LOCK_PIN) || defined(LED_SCROLL_LOCK_PIN) || defined(LED_COMPOSE_PIN) || defined(LED_KANA_PIN)
     // TODO: remove calls to led_init_ports from keyboards and remove ifdef
     led_init_ports();
diff --git a/quantum/quantum.h b/quantum/quantum.h
index b1600dd72..070bd0131 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -52,6 +52,7 @@
 #include "action_layer.h"
 #include "eeconfig.h"
 #include "bootloader.h"
+#include "bootmagic.h"
 #include "timer.h"
 #include "sync_timer.h"
 #include "config_common.h"
@@ -258,15 +259,6 @@ bool     process_record_user(uint16_t keycode, keyrecord_t *record);
 void     post_process_record_kb(uint16_t keycode, keyrecord_t *record);
 void     post_process_record_user(uint16_t keycode, keyrecord_t *record);
 
-#ifndef BOOTMAGIC_LITE_COLUMN
-#    define BOOTMAGIC_LITE_COLUMN 0
-#endif
-#ifndef BOOTMAGIC_LITE_ROW
-#    define BOOTMAGIC_LITE_ROW 0
-#endif
-
-void bootmagic_lite(void);
-
 void reset_keyboard(void);
 
 void startup_user(void);
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index e0f5dbc61..5eba218c9 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -578,6 +578,10 @@ enum quantum_keycodes {
 
 #endif
 
+    ONESHOT_ENABLE,
+    ONESHOT_DISABLE,
+    ONESHOT_TOGGLE,
+
     // always leave at the end
     SAFE_RANGE
 };
@@ -885,3 +889,8 @@ enum quantum_keycodes {
 #define DM_RSTP DYN_REC_STOP
 #define DM_PLY1 DYN_MACRO_PLAY1
 #define DM_PLY2 DYN_MACRO_PLAY2
+
+// One Shot toggle
+#define OS_TOGG ONESHOT_TOGGLE
+#define OS_ON ONESHOT_ENABLE
+#define OS_OFF ONESHOT_DISABLE
diff --git a/quantum/split_common/split_util.c b/quantum/split_common/split_util.c
index 2ae44e6e1..9e75e19ce 100644
--- a/quantum/split_common/split_util.c
+++ b/quantum/split_common/split_util.c
@@ -1,3 +1,18 @@
+/* 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/>.
+ */
 #include "split_util.h"
 #include "matrix.h"
 #include "keyboard.h"
@@ -6,14 +21,7 @@
 #include "transport.h"
 #include "quantum.h"
 #include "wait.h"
-
-#ifdef PROTOCOL_LUFA
-#    include <LUFA/Drivers/USB/USB.h>
-#endif
-
-#ifdef PROTOCOL_VUSB
-#    include <usbdrv/usbdrv.h>
-#endif
+#include "usb_util.h"
 
 #ifdef EE_HANDS
 #    include "eeconfig.h"
@@ -31,56 +39,21 @@
 #    define SPLIT_USB_TIMEOUT_POLL 10
 #endif
 
-#ifdef PROTOCOL_CHIBIOS
-#    define SPLIT_USB_DETECT  // Force this on for now
-#endif
-
 volatile bool isLeftHand = true;
 
 #if defined(SPLIT_USB_DETECT)
-#    if defined(PROTOCOL_LUFA)
-static inline bool usbHasActiveConnection(void) { return USB_Device_IsAddressSet(); }
-static inline void usbDisable(void) {
-    USB_Disable();
-    USB_DeviceState = DEVICE_STATE_Unattached;
-}
-#    elif defined(PROTOCOL_CHIBIOS)
-static inline bool usbHasActiveConnection(void) { return usbGetDriverStateI(&USBD1) == USB_ACTIVE; }
-static inline void usbDisable(void) { usbStop(&USBD1); }
-#    elif defined(PROTOCOL_VUSB)
-static inline bool usbHasActiveConnection(void) {
-    usbPoll();
-    return usbConfiguration;
-}
-static inline void usbDisable(void) { usbDeviceDisconnect(); }
-#    else
-static inline bool usbHasActiveConnection(void) { return true; }
-static inline void usbDisable(void) {}
-#    endif
-
-bool usbIsActive(void) {
+static bool usbIsActive(void) {
     for (uint8_t i = 0; i < (SPLIT_USB_TIMEOUT / SPLIT_USB_TIMEOUT_POLL); i++) {
         // This will return true if a USB connection has been established
-        if (usbHasActiveConnection()) {
+        if (usb_connected_state()) {
             return true;
         }
         wait_ms(SPLIT_USB_TIMEOUT_POLL);
     }
-
-    // Avoid NO_USB_STARTUP_CHECK - Disable USB as the previous checks seem to enable it somehow
-    usbDisable();
-
     return false;
 }
-#elif defined(PROTOCOL_LUFA) && defined(OTGPADE)
-static inline bool usbIsActive(void) {
-    USB_OTGPAD_On();  // enables VBUS pad
-    wait_us(5);
-
-    return USB_VBUS_GetStatus();  // checks state of VBUS
-}
 #else
-static inline bool usbIsActive(void) { return true; }
+static inline bool usbIsActive(void) { return usb_vbus_state(); }
 #endif
 
 #ifdef SPLIT_HAND_MATRIX_GRID
@@ -126,6 +99,11 @@ __attribute__((weak)) bool is_keyboard_master(void) {
     // only check once, as this is called often
     if (usbstate == UNKNOWN) {
         usbstate = usbIsActive() ? MASTER : SLAVE;
+
+        // Avoid NO_USB_STARTUP_CHECK - Disable USB as the previous checks seem to enable it somehow
+        if (usbstate == SLAVE) {
+            usb_disable();
+        }
     }
 
     return (usbstate == MASTER);
diff --git a/readme.md b/readme.md
index 6092f209b..bb85115af 100644
--- a/readme.md
+++ b/readme.md
@@ -9,6 +9,12 @@
 
 This is a keyboard firmware based on the [tmk\_keyboard firmware](https://github.com/tmk/tmk_keyboard) with some useful features for Atmel AVR and ARM controllers, and more specifically, the [OLKB product line](https://olkb.com), the [ErgoDox EZ](https://ergodox-ez.com) keyboard, and the [Clueboard product line](https://clueboard.co).
 
+# THIS IS THE DEVELOP BRANCH
+
+Warning- This is the `develop` branch of QMK Firmware. You may encounter broken code here. Please see [Breaking Changes](https://docs.qmk.fm/#/breaking_changes) for more information.
+
+# Original readme continues
+
 ## Documentation
 
 * [See the official documentation on docs.qmk.fm](https://docs.qmk.fm)
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index 238b3c69f..2f8f81126 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -12,6 +12,7 @@ TMK_COMMON_SRC +=	$(COMMON_DIR)/host.c \
         $(COMMON_DIR)/sendchar_null.c \
         $(COMMON_DIR)/eeconfig.c \
         $(COMMON_DIR)/report.c \
+        $(COMMON_DIR)/usb_util.c \
         $(PLATFORM_COMMON_DIR)/suspend.c \
         $(PLATFORM_COMMON_DIR)/timer.c \
         $(COMMON_DIR)/sync_timer.c \
@@ -24,28 +25,6 @@ else
     include $(TMK_PATH)/$(COMMON_DIR)/lib_printf.mk
 endif
 
-# Option modules
-BOOTMAGIC_ENABLE ?= no
-VALID_MAGIC_TYPES := yes full lite
-ifneq ($(strip $(BOOTMAGIC_ENABLE)), no)
-  ifeq ($(filter $(BOOTMAGIC_ENABLE),$(VALID_MAGIC_TYPES)),)
-    $(error BOOTMAGIC_ENABLE="$(BOOTMAGIC_ENABLE)" is not a valid type of magic)
-  endif
-  ifeq ($(strip $(BOOTMAGIC_ENABLE)), lite)
-      TMK_COMMON_DEFS += -DBOOTMAGIC_LITE
-      TMK_COMMON_SRC += $(COMMON_DIR)/bootmagic_lite.c
-
-      TMK_COMMON_DEFS += -DMAGIC_ENABLE
-      TMK_COMMON_SRC += $(COMMON_DIR)/magic.c
-  else
-    TMK_COMMON_DEFS += -DBOOTMAGIC_ENABLE
-    TMK_COMMON_SRC += $(COMMON_DIR)/bootmagic.c
-  endif
-else
-    TMK_COMMON_DEFS += -DMAGIC_ENABLE
-    TMK_COMMON_SRC += $(COMMON_DIR)/magic.c
-endif
-
 SHARED_EP_ENABLE = no
 MOUSE_SHARED_EP ?= yes
 ifeq ($(strip $(KEYBOARD_SHARED_EP)), yes)
diff --git a/tmk_core/common/action_util.c b/tmk_core/common/action_util.c
index 000503b08..a57c8bf66 100644
--- a/tmk_core/common/action_util.c
+++ b/tmk_core/common/action_util.c
@@ -147,12 +147,16 @@ void clear_oneshot_swaphands(void) {
  * FIXME: needs doc
  */
 void set_oneshot_layer(uint8_t layer, uint8_t state) {
-    oneshot_layer_data = layer << 3 | state;
-    layer_on(layer);
+    if (!keymap_config.oneshot_disable) {
+        oneshot_layer_data = layer << 3 | state;
+        layer_on(layer);
 #    if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
-    oneshot_layer_time = timer_read();
+        oneshot_layer_time = timer_read();
 #    endif
-    oneshot_layer_changed_kb(get_oneshot_layer());
+        oneshot_layer_changed_kb(get_oneshot_layer());
+    } else {
+        layer_on(layer);
+    }
 }
 /** \brief Reset oneshot layer
  *
@@ -172,7 +176,7 @@ void reset_oneshot_layer(void) {
 void clear_oneshot_layer_state(oneshot_fullfillment_t state) {
     uint8_t start_state = oneshot_layer_data;
     oneshot_layer_data &= ~state;
-    if (!get_oneshot_layer_state() && start_state != oneshot_layer_data) {
+    if ((!get_oneshot_layer_state() && start_state != oneshot_layer_data) || keymap_config.oneshot_disable) {
         layer_off(get_oneshot_layer());
         reset_oneshot_layer();
     }
@@ -182,6 +186,39 @@ void clear_oneshot_layer_state(oneshot_fullfillment_t state) {
  * FIXME: needs doc
  */
 bool is_oneshot_layer_active(void) { return get_oneshot_layer_state(); }
+
+/** \brief set oneshot
+ *
+ * FIXME: needs doc
+ */
+void oneshot_set(bool active) {
+    if (keymap_config.oneshot_disable != active) {
+        keymap_config.oneshot_disable = active;
+        eeconfig_update_keymap(keymap_config.raw);
+        dprintf("Oneshot: active: %d\n", active);
+    }
+}
+
+/** \brief toggle oneshot
+ *
+ * FIXME: needs doc
+ */
+void oneshot_toggle(void) { oneshot_set(!keymap_config.oneshot_disable); }
+
+/** \brief enable oneshot
+ *
+ * FIXME: needs doc
+ */
+void oneshot_enable(void) { oneshot_set(true); }
+
+/** \brief disable oneshot
+ *
+ * FIXME: needs doc
+ */
+void oneshot_disable(void) { oneshot_set(false); }
+
+bool is_oneshot_enabled(void) { return keymap_config.oneshot_disable; }
+
 #endif
 
 /** \brief Send keyboard report
@@ -321,14 +358,17 @@ void del_oneshot_mods(uint8_t mods) {
  * FIXME: needs doc
  */
 void set_oneshot_mods(uint8_t mods) {
-    if (oneshot_mods != mods) {
+    if (!keymap_config.oneshot_disable) {
+        if (oneshot_mods != mods) {
 #    if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
-        oneshot_time = timer_read();
+            oneshot_time = timer_read();
 #    endif
-        oneshot_mods = mods;
-        oneshot_mods_changed_kb(mods);
+            oneshot_mods = mods;
+            oneshot_mods_changed_kb(mods);
+        }
     }
 }
+
 /** \brief clear oneshot mods
  *
  * FIXME: needs doc
diff --git a/tmk_core/common/action_util.h b/tmk_core/common/action_util.h
index ff29f79b0..f2b3897ae 100644
--- a/tmk_core/common/action_util.h
+++ b/tmk_core/common/action_util.h
@@ -85,6 +85,11 @@ void oneshot_mods_changed_kb(uint8_t mods);
 void oneshot_layer_changed_user(uint8_t layer);
 void oneshot_layer_changed_kb(uint8_t layer);
 
+void oneshot_toggle(void);
+void oneshot_enable(void);
+void oneshot_disable(void);
+bool is_oneshot_enabled(void);
+
 /* inspect */
 uint8_t has_anymod(void);
 
diff --git a/tmk_core/common/chibios/chibios_config.h b/tmk_core/common/chibios/chibios_config.h
index b4d96465d..bebf026de 100644
--- a/tmk_core/common/chibios/chibios_config.h
+++ b/tmk_core/common/chibios/chibios_config.h
@@ -15,6 +15,8 @@
  */
 #pragma once
 
+#define SPLIT_USB_DETECT  // Force this on for now
+
 #if defined(STM32F1XX)
 #    define USE_GPIOV1
 #endif
diff --git a/tmk_core/common/chibios/sleep_led.c b/tmk_core/common/chibios/sleep_led.c
index 5595eec0e..477056a45 100644
--- a/tmk_core/common/chibios/sleep_led.c
+++ b/tmk_core/common/chibios/sleep_led.c
@@ -9,21 +9,13 @@
  * Use LP timer on Kinetises, TIM14 on STM32F0.
  */
 
-#if defined(KL2x) || defined(K20x)
-
-/* Use Low Power Timer (LPTMR) */
-#    define TIMER_INTERRUPT_VECTOR KINETIS_LPTMR0_IRQ_VECTOR
-#    define RESET_COUNTER LPTMR0->CSR |= LPTMRx_CSR_TCF
-
-#elif defined(STM32F0XX)
-
-/* Use TIM14 manually */
-#    define TIMER_INTERRUPT_VECTOR STM32_TIM14_HANDLER
-#    define RESET_COUNTER STM32_TIM14->SR &= ~STM32_TIM_SR_UIF
-
+#ifndef SLEEP_LED_GPT_DRIVER
+#    if defined(STM32F0XX)
+#        define SLEEP_LED_GPT_DRIVER GPTD14
+#    endif
 #endif
 
-#if defined(KL2x) || defined(K20x) || defined(STM32F0XX) /* common parts for timers/interrupts */
+#if defined(KL2x) || defined(K20x) || defined(SLEEP_LED_GPT_DRIVER) /* common parts for timers/interrupts */
 
 /* Breathing Sleep LED brighness(PWM On period) table
  * (64[steps] * 4[duration]) / 64[PWM periods/s] = 4 second breath cycle
@@ -33,10 +25,7 @@
  */
 static const uint8_t breathing_table[64] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 4, 6, 10, 15, 23, 32, 44, 58, 74, 93, 113, 135, 157, 179, 199, 218, 233, 245, 252, 255, 252, 245, 233, 218, 199, 179, 157, 135, 113, 93, 74, 58, 44, 32, 23, 15, 10, 6, 4, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
-/* interrupt handler */
-OSAL_IRQ_HANDLER(TIMER_INTERRUPT_VECTOR) {
-    OSAL_IRQ_PROLOGUE();
-
+void sleep_led_timer_callback(void) {
     /* Software PWM
      * timer:1111 1111 1111 1111
      *       \_____/\/ \_______/____  count(0-255)
@@ -64,17 +53,16 @@ OSAL_IRQ_HANDLER(TIMER_INTERRUPT_VECTOR) {
     if (timer.pwm.count == breathing_table[timer.pwm.index]) {
         led_set(0);
     }
-
-    /* Reset the counter */
-    RESET_COUNTER;
-
-    OSAL_IRQ_EPILOGUE();
 }
 
 #endif /* common parts for known platforms */
 
 #if defined(KL2x) || defined(K20x) /* platform selection: familiar Kinetis chips */
 
+/* Use Low Power Timer (LPTMR) */
+#    define TIMER_INTERRUPT_VECTOR KINETIS_LPTMR0_IRQ_VECTOR
+#    define RESET_COUNTER LPTMR0->CSR |= LPTMRx_CSR_TCF
+
 /* LPTMR clock options */
 #    define LPTMR_CLOCK_MCGIRCLK 0 /* 4MHz clock */
 #    define LPTMR_CLOCK_LPO 1      /* 1kHz clock */
@@ -86,6 +74,18 @@ OSAL_IRQ_HANDLER(TIMER_INTERRUPT_VECTOR) {
 #        define SIM_SCGC5_LPTMR SIM_SCGC5_LPTIMER
 #    endif
 
+/* interrupt handler */
+OSAL_IRQ_HANDLER(TIMER_INTERRUPT_VECTOR) {
+    OSAL_IRQ_PROLOGUE();
+
+    sleep_led_timer_callback();
+
+    /* Reset the counter */
+    RESET_COUNTER;
+
+    OSAL_IRQ_EPILOGUE();
+}
+
 /* Initialise the timer */
 void sleep_led_init(void) {
     /* Make sure the clock to the LPTMR is enabled */
@@ -159,45 +159,23 @@ void sleep_led_toggle(void) {
     LPTMR0->CSR ^= LPTMRx_CSR_TEN;
 }
 
-#elif defined(STM32F0XX) /* platform selection: STM32F0XX */
-
-/* Initialise the timer */
-void sleep_led_init(void) {
-    /* enable clock */
-    rccEnableTIM14(FALSE); /* low power enable = FALSE */
-    rccResetTIM14();
-
-    /* prescale */
-    /* Assuming 48MHz internal clock */
-    /* getting cca 65484 irqs/sec */
-    STM32_TIM14->PSC = 733;
+#elif defined(SLEEP_LED_GPT_DRIVER)
 
-    /* auto-reload */
-    /* 0 => interrupt every time */
-    STM32_TIM14->ARR = 3;
+static void gptTimerCallback(GPTDriver *gptp) {
+    (void)gptp;
+    sleep_led_timer_callback();
+}
 
-    /* enable counter update event interrupt */
-    STM32_TIM14->DIER |= STM32_TIM_DIER_UIE;
+static const GPTConfig gptcfg = {1000000, gptTimerCallback, 0, 0};
 
-    /* register interrupt vector */
-    nvicEnableVector(STM32_TIM14_NUMBER, 2); /* vector, priority */
-}
+/* Initialise the timer */
+void sleep_led_init(void) { gptStart(&SLEEP_LED_GPT_DRIVER, &gptcfg); }
 
-void sleep_led_enable(void) {
-    /* Enable the timer */
-    STM32_TIM14->CR1 = STM32_TIM_CR1_CEN | STM32_TIM_CR1_URS;
-    /* URS => update event only on overflow; setting UG bit disabled */
-}
+void sleep_led_enable(void) { gptStartContinuous(&SLEEP_LED_GPT_DRIVER, gptcfg.frequency / 0xFFFF); }
 
-void sleep_led_disable(void) {
-    /* Disable the timer */
-    STM32_TIM14->CR1 = 0;
-}
+void sleep_led_disable(void) { gptStopTimer(&SLEEP_LED_GPT_DRIVER); }
 
-void sleep_led_toggle(void) {
-    /* Toggle the timer */
-    STM32_TIM14->CR1 ^= STM32_TIM_CR1_CEN;
-}
+void sleep_led_toggle(void) { (SLEEP_LED_GPT_DRIVER.state == GPT_READY) ? sleep_led_enable() : sleep_led_disable(); }
 
 #else /* platform selection: not on familiar chips */
 
diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
index ce3255c06..65d9e00c7 100644
--- a/tmk_core/common/keyboard.c
+++ b/tmk_core/common/keyboard.c
@@ -34,11 +34,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef BACKLIGHT_ENABLE
 #    include "backlight.h"
 #endif
-#ifdef BOOTMAGIC_ENABLE
-#    include "bootmagic.h"
-#else
-#    include "magic.h"
-#endif
 #ifdef MOUSEKEY_ENABLE
 #    include "mousekey.h"
 #endif
@@ -296,11 +291,6 @@ void keyboard_init(void) {
 #ifdef ADB_MOUSE_ENABLE
     adb_mouse_init();
 #endif
-#ifdef BOOTMAGIC_ENABLE
-    bootmagic();
-#else
-    magic();
-#endif
 #ifdef BACKLIGHT_ENABLE
     backlight_init();
 #endif
diff --git a/tmk_core/common/magic.c b/tmk_core/common/magic.c
deleted file mode 100644
index e14994164..000000000
--- a/tmk_core/common/magic.c
+++ /dev/null
@@ -1,39 +0,0 @@
-#include <stdint.h>
-#include <stdbool.h>
-#if defined(__AVR__)
-#    include <util/delay.h>
-#endif
-#include "matrix.h"
-#include "bootloader.h"
-#include "debug.h"
-#include "keymap.h"
-#include "host.h"
-#include "action_layer.h"
-#include "eeconfig.h"
-#include "magic.h"
-
-keymap_config_t keymap_config;
-
-/** \brief Magic
- *
- * FIXME: Needs doc
- */
-void magic(void) {
-    /* check signature */
-    if (!eeconfig_is_enabled()) {
-        eeconfig_init();
-    }
-
-    /* debug enable */
-    debug_config.raw = eeconfig_read_debug();
-
-    /* keymap config */
-    keymap_config.raw = eeconfig_read_keymap();
-
-    uint8_t default_layer = 0;
-    default_layer         = eeconfig_read_default_layer();
-    default_layer_set((layer_state_t)default_layer);
-
-    /* Also initialize layer state to trigger callback functions for layer_state */
-    layer_state_set_kb((layer_state_t)layer_state);
-}
diff --git a/tmk_core/common/magic.h b/tmk_core/common/magic.h
deleted file mode 100644
index a6552c04d..000000000
--- a/tmk_core/common/magic.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-void magic(void);
diff --git a/tmk_core/common/usb_util.c b/tmk_core/common/usb_util.c
new file mode 100644
index 000000000..e4c50fcb1
--- /dev/null
+++ b/tmk_core/common/usb_util.c
@@ -0,0 +1,29 @@
+/* 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/>.
+ */
+#include "usb_util.h"
+#include "wait.h"
+
+__attribute__((weak)) void usb_disable(void) {}
+__attribute__((weak)) bool usb_connected_state(void) { return true; }
+__attribute__((weak)) bool usb_vbus_state(void) {
+#ifdef USB_VBUS_PIN
+    setPinInput(USB_VBUS_PIN);
+    wait_us(5);
+    return readPin(USB_VBUS_PIN);
+#else
+    return true;
+#endif
+}
diff --git a/tmk_core/common/usb_util.h b/tmk_core/common/usb_util.h
new file mode 100644
index 000000000..4ebedb1e7
--- /dev/null
+++ b/tmk_core/common/usb_util.h
@@ -0,0 +1,22 @@
+/* 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 <stdbool.h>
+
+void usb_disable(void);
+bool usb_connected_state(void);
+bool usb_vbus_state(void);
diff --git a/tmk_core/protocol.mk b/tmk_core/protocol.mk
index 0c41642b9..cc87e8347 100644
--- a/tmk_core/protocol.mk
+++ b/tmk_core/protocol.mk
@@ -54,5 +54,9 @@ ifeq ($(strip $(XT_ENABLE)), yes)
     OPT_DEFS += -DXT_ENABLE
 endif
 
+ifeq ($(strip $(USB_HID_ENABLE)), yes)
+    include $(TMK_DIR)/protocol/usb_hid.mk
+endif
+
 # Search Path
 VPATH += $(TMK_DIR)/protocol
diff --git a/tmk_core/protocol/chibios.mk b/tmk_core/protocol/chibios.mk
index 80554abb3..d01697835 100644
--- a/tmk_core/protocol/chibios.mk
+++ b/tmk_core/protocol/chibios.mk
@@ -6,6 +6,7 @@ SRC += $(CHIBIOS_DIR)/usb_main.c
 SRC += $(CHIBIOS_DIR)/main.c
 SRC += usb_descriptor.c
 SRC += $(CHIBIOS_DIR)/usb_driver.c
+SRC += $(CHIBIOS_DIR)/usb_util.c
 SRC += $(LIBSRC)
 
 VPATH += $(TMK_PATH)/$(PROTOCOL_DIR)
diff --git a/tmk_core/protocol/chibios/usb_util.c b/tmk_core/protocol/chibios/usb_util.c
new file mode 100644
index 000000000..5945e8a8d
--- /dev/null
+++ b/tmk_core/protocol/chibios/usb_util.c
@@ -0,0 +1,21 @@
+/* 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/>.
+ */
+#include <hal.h>
+#include "usb_util.h"
+
+void usb_disable(void) { usbStop(&USBD1); }
+
+bool usb_connected_state(void) { return usbGetDriverStateI(&USBD1) == USB_ACTIVE; }
diff --git a/tmk_core/protocol/lufa.mk b/tmk_core/protocol/lufa.mk
index 1cc1fa04e..9d9fb728b 100644
--- a/tmk_core/protocol/lufa.mk
+++ b/tmk_core/protocol/lufa.mk
@@ -44,6 +44,7 @@ ifeq ($(strip $(VIRTSER_ENABLE)), yes)
 endif
 
 SRC += $(LUFA_SRC)
+SRC += $(LUFA_DIR)/usb_util.c
 
 # Search Path
 VPATH += $(TMK_PATH)/$(LUFA_DIR)
diff --git a/tmk_core/protocol/lufa/usb_util.c b/tmk_core/protocol/lufa/usb_util.c
new file mode 100644
index 000000000..9e943a21b
--- /dev/null
+++ b/tmk_core/protocol/lufa/usb_util.c
@@ -0,0 +1,34 @@
+/* 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/>.
+ */
+#include <LUFA/Drivers/USB/USB.h>
+#include "usb_util.h"
+#include "wait.h"
+
+void usb_disable(void) {
+    USB_Disable();
+    USB_DeviceState = DEVICE_STATE_Unattached;
+}
+
+bool usb_connected_state(void) { return USB_Device_IsAddressSet(); }
+
+#if defined(OTGPADE)
+bool usb_vbus_state(void) {
+    USB_OTGPAD_On();  // enables VBUS pad
+    wait_us(5);
+
+    return USB_VBUS_GetStatus();  // checks state of VBUS
+}
+#endif
diff --git a/tmk_core/protocol/vusb.mk b/tmk_core/protocol/vusb.mk
index 1de600308..e4d013b38 100644
--- a/tmk_core/protocol/vusb.mk
+++ b/tmk_core/protocol/vusb.mk
@@ -5,6 +5,7 @@ VUSB_PATH = $(LIB_PATH)/vusb
 
 SRC += $(VUSB_DIR)/main.c \
         $(VUSB_DIR)/vusb.c \
+        $(VUSB_DIR)/usb_util.c \
         $(VUSB_PATH)/usbdrv/usbdrv.c \
         $(VUSB_PATH)/usbdrv/usbdrvasm.S \
         $(VUSB_PATH)/usbdrv/oddebug.c
diff --git a/tmk_core/protocol/vusb/usb_util.c b/tmk_core/protocol/vusb/usb_util.c
new file mode 100644
index 000000000..602854dbe
--- /dev/null
+++ b/tmk_core/protocol/vusb/usb_util.c
@@ -0,0 +1,24 @@
+/* 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/>.
+ */
+#include <usbdrv/usbdrv.h>
+#include "usb_util.h"
+
+void usb_disable(void) { usbDeviceDisconnect(); }
+
+bool usb_connected_state(void) {
+    usbPoll();
+    return usbConfiguration;
+}