[Keyboard} Add ISO support for the GMMK Pro (#13532)

* Added iso layer support for the GMMK Pro iso version

* Adjusted the mapping

* aligning with best practises
* aligning with comments from PR

* Added iso layout to info.json

3 files changed, 197 insertions, 0 deletions

diff --git a/keyboards/gmmk/pro/info.json b/keyboards/gmmk/pro/info.json
index 37ab5b43ee..427e562e36 100644
--- a/keyboards/gmmk/pro/info.json
+++ b/keyboards/gmmk/pro/info.json
@@ -106,6 +106,109 @@
                 {"x":14.25, "y":5.5},
                 {"x":15.25, "y":5.5}
             ]
+        },
+        "LAYOUT_iso": {
+            "layout": [
+                {"label":"Esc", "x":0, "y":0},
+
+                {"label":"F1", "x":1.25, "y":0},
+                {"label":"F2", "x":2.25, "y":0},
+                {"label":"F3", "x":3.25, "y":0},
+                {"label":"F4", "x":4.25, "y":0},
+
+                {"label":"F5", "x":5.5, "y":0},
+                {"label":"F6", "x":6.5, "y":0},
+                {"label":"F7", "x":7.5, "y":0},
+                {"label":"F8", "x":8.5, "y":0},
+
+                {"label":"F9", "x":9.75, "y":0},
+                {"label":"F10", "x":10.75, "y":0},
+                {"label":"F11", "x":11.75, "y":0},
+                {"label":"F12", "x":12.75, "y":0},
+
+                {"label":"Printscreen", "x":14, "y":0},
+                {"label":"Rotary", "x":15.5, "y":0},
+
+                {"label":"`", "x":0, "y":1.25},
+                {"label":"1", "x":1, "y":1.25},
+                {"label":"2", "x":2, "y":1.25},
+                {"label":"3", "x":3, "y":1.25},
+                {"label":"4", "x":4, "y":1.25},
+                {"label":"5", "x":5, "y":1.25},
+                {"label":"6", "x":6, "y":1.25},
+                {"label":"7", "x":7, "y":1.25},
+                {"label":"8", "x":8, "y":1.25},
+                {"label":"9", "x":9, "y":1.25},
+                {"label":"0", "x":10, "y":1.25},
+                {"label":"-", "x":11, "y":1.25},
+                {"label":"=", "x":12, "y":1.25},
+                {"label":"Backspace", "x":13, "y":1.25, "w":2},
+
+                {"label":"Delete", "x":15.5, "y":1.25},
+
+                {"label":"Tab", "x":0, "y":2.25, "w":1.5},
+                {"label":"Q", "x":1.5, "y":2.25},
+                {"label":"W", "x":2.5, "y":2.25},
+                {"label":"E", "x":3.5, "y":2.25},
+                {"label":"R", "x":4.5, "y":2.25},
+                {"label":"T", "x":5.5, "y":2.25},
+                {"label":"Y", "x":6.5, "y":2.25},
+                {"label":"U", "x":7.5, "y":2.25},
+                {"label":"I", "x":8.5, "y":2.25},
+                {"label":"O", "x":9.5, "y":2.25},
+                {"label":"P", "x":10.5, "y":2.25},
+                {"label":"[", "x":11.5, "y":2.25},
+                {"label":"]", "x":12.5, "y":2.25},
+
+                {"label":"Page Up", "x":15.5, "y":2.25},
+
+                {"label":"Caps Lock", "x":0, "y":3.25, "w":1.75},
+                {"label":"A", "x":1.75, "y":3.25},
+                {"label":"S", "x":2.75, "y":3.25},
+                {"label":"D", "x":3.75, "y":3.25},
+                {"label":"F", "x":4.75, "y":3.25},
+                {"label":"G", "x":5.75, "y":3.25},
+                {"label":"H", "x":6.75, "y":3.25},
+                {"label":"J", "x":7.75, "y":3.25},
+                {"label":"K", "x":8.75, "y":3.25},
+                {"label":"L", "x":9.75, "y":3.25},
+                {"label":";", "x":10.75, "y":3.25},
+                {"label":"'", "x":11.75, "y":3.25},
+                {"label":"Iso #", "x":12.75, "y":3.25},
+                {"label":"Enter", "x":13.75, "y":2.25, "w":1.25, "h":2},
+
+                {"label":"Page Down", "x":15.5, "y":3.25},
+
+                {"label":"Shift", "x":0, "y":4.25, "w":1.25},
+                {"label":"Iso \\", "x":1.25, "y":4.25},
+                {"label":"Z", "x":2.25, "y":4.25},
+                {"label":"X", "x":3.25, "y":4.25},
+                {"label":"C", "x":4.25, "y":4.25},
+                {"label":"V", "x":5.25, "y":4.25},
+                {"label":"B", "x":6.25, "y":4.25},
+                {"label":"N", "x":7.25, "y":4.25},
+                {"label":"M", "x":8.25, "y":4.25},
+                {"label":",", "x":9.25, "y":4.25},
+                {"label":".", "x":10.25, "y":4.25},
+                {"label":"/", "x":11.25, "y":4.25},
+                {"label":"Shift", "x":12.25, "y":4.25, "w":1.75},
+
+                {"label":"Up", "x":14.25, "y":4.5},
+
+                {"label":"End", "x":15.5, "y":4.25},
+
+                {"label":"Ctrl", "x":0, "y":5.25, "w":1.25},
+                {"label":"GUI", "x":1.25, "y":5.25, "w":1.25},
+                {"label":"Alt", "x":2.5, "y":5.25, "w":1.25},
+                {"label":"Space", "x":3.75, "y":5.25, "w":6.25},
+                {"label":"Alt", "x":10, "y":5.25},
+                {"label":"Fn", "x":11, "y":5.25},
+                {"label":"Ctrl", "x":12, "y":5.25},
+
+                {"label":"Left", "x":13.25, "y":5.5},
+                {"label":"Down", "x":14.25, "y":5.5},
+                {"label":"Right", "x":15.25, "y":5.5}
+            ]
         }
     }
 }
diff --git a/keyboards/gmmk/pro/keymaps/iso/keymap.c b/keyboards/gmmk/pro/keymaps/iso/keymap.c
new file mode 100644
index 0000000000..402becbe6e
--- /dev/null
+++ b/keyboards/gmmk/pro/keymaps/iso/keymap.c
@@ -0,0 +1,65 @@
+/* Copyright 2021 Glorious, LLC <salman@pcgamingrace.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 QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+//      ESC      F1       F2       F3       F4       F5       F6       F7       F8       F9       F10      F11      F12	     Prt           Rotary(Mute)
+//      ~        1        2        3        4        5        6        7        8        9        0         -       (=)	     BackSpc           Del
+//      Tab      Q        W        E        R        T        Y        U        I        O        P        [        ]                          PgUp
+//      Caps     A        S        D        F        G        H        J        K        L        ;        "        #        Enter             PgDn
+//      Sh_L     /        Z        X        C        V        B        N        M        ,        .        ?                 Sh_R     Up       End
+//      Ct_L     Win_L    Alt_L                               SPACE                               Alt_R    FN       Ct_R     Left     Down     Right
+
+
+    // The FN key by default maps to a momentary toggle to layer 1 to provide access to the RESET key (to put the board into bootloader mode). Without
+    // this mapping, you have to open the case to hit the button on the bottom of the PCB (near the USB cable attachment) while plugging in the USB
+    // cable to get the board into bootloader mode - definitely not fun when you're working on your QMK builds. Remove this and put it back to KC_RGUI
+    // if that's your preference.
+    //
+    // To put the keyboard in bootloader mode, use FN+backspace. If you accidentally put it into bootloader, you can just unplug the USB cable and
+    // it'll be back to normal when you plug it back in.
+    [0] = LAYOUT_iso(
+        KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_PSCR,          KC_MUTE,
+        KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC,          KC_DEL,
+        KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC,                   KC_PGUP,
+        KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_NUHS, KC_ENT,           KC_PGDN,
+        KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT, KC_UP,   KC_END,
+        KC_LCTL, KC_LGUI, KC_LALT,                            KC_SPC,                             KC_RALT, MO(1),   KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT
+    ),
+
+    [1] = LAYOUT_iso(
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RESET,            _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                   _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______, _______, _______,
+        _______, _______, _______,                            _______,                            _______, _______, _______, _______, _______, _______
+    ),
+
+
+};
+
+
+bool encoder_update_user(uint8_t index, bool clockwise) {
+    if (clockwise) {
+      tap_code(KC_VOLU);
+    } else {
+      tap_code(KC_VOLD);
+    }
+    return true;
+}
diff --git a/keyboards/gmmk/pro/pro.h b/keyboards/gmmk/pro/pro.h
index ddce60241b..8295bb2f75 100644
--- a/keyboards/gmmk/pro/pro.h
+++ b/keyboards/gmmk/pro/pro.h
@@ -48,3 +48,32 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     { k90, k91, k92, k93, k94, k95, ___, k97}, \
     { ___, ka1, ka2, ka3, ka4, ka5, ka6, ka7}  \
 }
+
+//  ESC  F1   F2   F3   F4   F5   F6   F7   F8   F9   F10  F11  F12  Prt    Rotary(Mute)
+//  ~    1    2    3    4    5    6    7    8    9    0    -    (=)  BSpc     Del
+//  Tab  Q    W    E    R    T    Y    U    I    O    P    [    ]             PgUp
+//  Caps A    S    D    F    G    H    J    K    L    ;    "    #    Enter    PgDn
+//  Sh_L /    Z    X    C    V    B    N    M    ,    .    ?  Sh_R       Up   End
+//  Ct_L    Win_L   Alt_L      SPACE          Alt_R   FN   Ct_R     Left Down Right
+
+#define LAYOUT_iso( \
+    k13, k26, k36, k31, k33, k07, k63, k71, k76, ka6, ka7, ka3, ka5, k97,     k01, \
+    k16, k17, k27, k37, k47, k46, k56, k57, k67, k77, k87, k86, k66, ka1,     k65, \
+    k11, k10, k20, k30, k40, k41, k51, k50, k60, k70, k80, k81, k61,          k15, \
+    k21, k12, k22, k32, k42, k43, k53, k52, k62, k72, k82, k83, k84, ka4,     k25, \
+    k00, k23, k14, k24, k34, k44, k45, k55, k54, k64, k74, k85,    k91,       k35, k75, \
+    k06,    k90,    k93,       k94,          k95,     k92, k04,     k03, k73, k05  \
+) \
+{ \
+    { k00, k01, ___, k03, k04, k05, k06, k07}, \
+    { k10, k11, k12, k13, k14, k15, k16, k17}, \
+    { k20, k21, k22, k23, k24, k25, k26, k27}, \
+    { k30, k31, k32, k33, k34, k35, k36, k37}, \
+    { k40, k41, k42, k43, k44, k45, k46, k47}, \
+    { k50, k51, k52, k53, k54, k55, k56, k57}, \
+    { k60, k61, k62, k63, k64, k65, k66, k67}, \
+    { k70, k71, k72, k73, k74, k75, k76, k77}, \
+    { k80, k81, k82, k83, k84, k85, k86, k87}, \
+    { k90, k91, k92, k93, k94, k95, ___, k97}, \
+    { ___, ka1, ___, ka3, ka4, ka5, ka6, ka7}  \
+}