10 files changed, 56 insertions, 12 deletions
diff --git a/quantum/process_keycode/process_audio.c b/quantum/process_keycode/process_audio.c
index 3b5fa8490b..23664721e8 100644
--- a/quantum/process_keycode/process_audio.c
+++ b/quantum/process_keycode/process_audio.c
@@ -57,3 +57,4 @@ void process_audio_noteoff(uint8_t note) { stop_note(compute_freq_for_midi_note(
 void process_audio_all_notes_off(void) { stop_all_notes(); }
 
 __attribute__((weak)) void audio_on_user() {}
+__attribute__((weak)) void audio_off_user() {}
diff --git a/quantum/process_keycode/process_audio.h b/quantum/process_keycode/process_audio.h
index d89a834ea8..42cfab4af2 100644
--- a/quantum/process_keycode/process_audio.h
+++ b/quantum/process_keycode/process_audio.h
@@ -8,3 +8,4 @@ void process_audio_noteoff(uint8_t note);
 void process_audio_all_notes_off(void);
 
 void audio_on_user(void);
+void audio_off_user(void);
diff --git a/quantum/process_keycode/process_combo.c b/quantum/process_keycode/process_combo.c
index a050161edf..8040ede528 100644
--- a/quantum/process_keycode/process_combo.c
+++ b/quantum/process_keycode/process_combo.c
@@ -40,10 +40,18 @@ __attribute__((weak)) bool get_combo_must_tap(uint16_t index, combo_t *combo) {
 __attribute__((weak)) uint16_t get_combo_term(uint16_t index, combo_t *combo) { return COMBO_TERM; }
 #endif
 
+#ifdef COMBO_MUST_PRESS_IN_ORDER_PER_COMBO
+__attribute__((weak)) bool get_combo_must_press_in_order(uint16_t combo_index, combo_t *combo) { return true; }
+#endif
+
 #ifdef COMBO_PROCESS_KEY_RELEASE
 __attribute__((weak)) bool process_combo_key_release(uint16_t combo_index, combo_t *combo, uint8_t key_index, uint16_t keycode) { return false; }
 #endif
 
+#ifdef COMBO_SHOULD_TRIGGER
+__attribute__((weak)) bool combo_should_trigger(uint16_t combo_index, combo_t *combo, uint16_t keycode, keyrecord_t *record) { return true; }
+#endif
+
 #ifndef COMBO_NO_TIMER
 static uint16_t timer = 0;
 #endif
@@ -350,6 +358,28 @@ combo_t *overlaps(combo_t *combo1, combo_t *combo2) {
     return combo1;
 }
 
+#if defined(COMBO_MUST_PRESS_IN_ORDER) || defined(COMBO_MUST_PRESS_IN_ORDER_PER_COMBO)
+static bool keys_pressed_in_order(uint16_t combo_index, combo_t *combo, uint16_t key_index, uint16_t keycode, keyrecord_t *record) {
+#    ifdef COMBO_MUST_PRESS_IN_ORDER_PER_COMBO
+    if (!get_combo_must_press_in_order(combo_index, combo)) {
+        return true;
+    }
+#    endif
+    if (
+        // The `state` bit for the key being pressed.
+        (1 << key_index) ==
+        // The *next* combo key's bit.
+        (COMBO_STATE(combo) + 1)
+        // E.g. two keys already pressed: `state == 11`.
+        // Next possible `state` is `111`.
+        // So the needed bit is `100` which we get with `11 + 1`.
+    ) {
+        return true;
+    }
+    return false;
+}
+#endif
+
 static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record, uint16_t combo_index) {
     uint8_t  key_count = 0;
     uint16_t key_index = -1;
@@ -360,7 +390,14 @@ static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *
         return false;
     }
 
-    bool key_is_part_of_combo = !COMBO_DISABLED(combo) && is_combo_enabled();
+    bool key_is_part_of_combo = (!COMBO_DISABLED(combo) && is_combo_enabled()
+#if defined(COMBO_MUST_PRESS_IN_ORDER) || defined(COMBO_MUST_PRESS_IN_ORDER_PER_COMBO)
+                                 && keys_pressed_in_order(combo_index, combo, key_index, keycode, record)
+#endif
+#ifdef COMBO_SHOULD_TRIGGER
+                                 && combo_should_trigger(combo_index, combo, keycode, record)
+#endif
+    );
 
     if (record->event.pressed && key_is_part_of_combo) {
         uint16_t time = _get_combo_term(combo_index, combo);
diff --git a/quantum/process_keycode/process_grave_esc.c b/quantum/process_keycode/process_grave_esc.c
index 41c50f5cb8..ddf027391d 100644
--- a/quantum/process_keycode/process_grave_esc.c
+++ b/quantum/process_keycode/process_grave_esc.c
@@ -15,13 +15,13 @@
  */
 #include "process_grave_esc.h"
 
-/* true if the last press of GRAVE_ESC was shifted (i.e. GUI or SHIFT were pressed), false otherwise.
+/* true if the last press of QK_GRAVE_ESCAPE was shifted (i.e. GUI or SHIFT were pressed), false otherwise.
  * Used to ensure that the correct keycode is released if the key is released.
  */
 static bool grave_esc_was_shifted = false;
 
 bool process_grave_esc(uint16_t keycode, keyrecord_t *record) {
-    if (keycode == GRAVE_ESC) {
+    if (keycode == QK_GRAVE_ESCAPE) {
         const uint8_t mods    = get_mods();
         uint8_t       shifted = mods & MOD_MASK_SG;
 
diff --git a/quantum/process_keycode/process_key_lock.c b/quantum/process_keycode/process_key_lock.c
index 4bd58f0c1e..941a2c5780 100644
--- a/quantum/process_keycode/process_key_lock.c
+++ b/quantum/process_keycode/process_key_lock.c
@@ -56,6 +56,11 @@ static inline uint16_t translate_keycode(uint16_t keycode) {
     }
 }
 
+void cancel_key_lock(void) {
+    watching = false;
+    UNSET_KEY_STATE(0x0);
+}
+
 bool process_key_lock(uint16_t *keycode, keyrecord_t *record) {
     // We start by categorizing the keypress event. In the event of a down
     // event, there are several possibilities:
diff --git a/quantum/process_keycode/process_key_lock.h b/quantum/process_keycode/process_key_lock.h
index baa0b39077..5159b0ba02 100644
--- a/quantum/process_keycode/process_key_lock.h
+++ b/quantum/process_keycode/process_key_lock.h
@@ -18,4 +18,5 @@
 
 #include "quantum.h"
 
+void cancel_key_lock(void);
 bool process_key_lock(uint16_t *keycode, keyrecord_t *record);
diff --git a/quantum/process_keycode/process_magic.c b/quantum/process_keycode/process_magic.c
index d5cff4f12a..6332be647c 100644
--- a/quantum/process_keycode/process_magic.c
+++ b/quantum/process_keycode/process_magic.c
@@ -44,6 +44,7 @@ bool process_magic(uint16_t keycode, keyrecord_t *record) {
             case MAGIC_SWAP_CONTROL_CAPSLOCK ... MAGIC_TOGGLE_ALT_GUI:
             case MAGIC_SWAP_LCTL_LGUI ... MAGIC_EE_HANDS_RIGHT:
             case MAGIC_TOGGLE_GUI:
+            case MAGIC_TOGGLE_CONTROL_CAPSLOCK:
                 /* keymap config */
                 keymap_config.raw = eeconfig_read_keymap();
                 switch (keycode) {
@@ -168,6 +169,9 @@ bool process_magic(uint16_t keycode, keyrecord_t *record) {
                     case MAGIC_TOGGLE_GUI:
                         keymap_config.no_gui = !keymap_config.no_gui;
                         break;
+                    case MAGIC_TOGGLE_CONTROL_CAPSLOCK:
+                        keymap_config.swap_control_capslock = !keymap_config.swap_control_capslock;
+                        break;
                 }
 
                 eeconfig_update_keymap(keymap_config.raw);
diff --git a/quantum/process_keycode/process_printer.c b/quantum/process_keycode/process_printer.c
index 82528cc680..0801f078ef 100644
--- a/quantum/process_keycode/process_printer.c
+++ b/quantum/process_keycode/process_printer.c
@@ -16,13 +16,14 @@
 
 #include "process_printer.h"
 #include "action_util.h"
+#include "uart.h"
 
 bool    printing_enabled = false;
 uint8_t character_shift  = 0;
 
 void enable_printing(void) {
     printing_enabled = true;
-    serial_init();
+    uart_init(19200);
 }
 
 void disable_printing(void) { printing_enabled = false; }
@@ -35,7 +36,7 @@ uint8_t shifted_numbers[10] = {0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, 0x26, 0x2A, 0
 
 void print_char(char c) {
     USB_Disable();
-    serial_send(c);
+    uart_write(c);
     USB_Init();
 }
 
diff --git a/quantum/process_keycode/process_printer.h b/quantum/process_keycode/process_printer.h
index 3c6d06ff94..6f4d09f333 100644
--- a/quantum/process_keycode/process_printer.h
+++ b/quantum/process_keycode/process_printer.h
@@ -18,6 +18,4 @@
 
 #include "quantum.h"
 
-#include "protocol/serial.h"
-
 bool process_printer(uint16_t keycode, keyrecord_t *record);
diff --git a/quantum/process_keycode/process_rgb.c b/quantum/process_keycode/process_rgb.c
index 69853cd5c4..c805bd615d 100644
--- a/quantum/process_keycode/process_rgb.c
+++ b/quantum/process_keycode/process_rgb.c
@@ -51,12 +51,8 @@ static void __attribute__((noinline, unused)) handleKeycodeRGBMode(const uint8_t
  * Handle keycodes for both rgblight and rgbmatrix
  */
 bool process_rgb(const uint16_t keycode, const keyrecord_t *record) {
-#ifndef SPLIT_KEYBOARD
-    if (record->event.pressed) {
-#else
-    // Split keyboards need to trigger on key-up for edge-case issue
+    // need to trigger on key-up for edge-case issue
     if (!record->event.pressed) {
-#endif
 #if (defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_DISABLE_KEYCODES)) || (defined(RGB_MATRIX_ENABLE) && !defined(RGB_MATRIX_DISABLE_KEYCODES))
         uint8_t shifted = get_mods() & MOD_MASK_SHIFT;
 #endif