Improve JJ40 Cockpit documentation (#2729)

* Add JJ40 Cockpit keymap

* Fix lower layer symbols

* Improve documentation JJ40 Cockpit

2 files changed, 58 insertions, 2 deletions

diff --git a/keyboards/jj40/keymaps/cockpit/keymap.c b/keyboards/jj40/keymaps/cockpit/keymap.c
index 8480f221eb..e8534b63d2 100644
--- a/keyboards/jj40/keymaps/cockpit/keymap.c
+++ b/keyboards/jj40/keymaps/cockpit/keymap.c
@@ -122,10 +122,10 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  * |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |  F7  |  F8  |  F9  | F10  | F11  | F12  |
  * |------+------+------+------+------+-------------+------+------+------+------+------|
  * |      | RGB  | RGB  | RGB  | RGB  |  BL  |  BL  |  BL  |      |      |      |      |
- * | Caps | Togl | Hue+ | Sat+ | Brt+ | Togl |Breath| Brt+ |      |      |      |VolUp |
+ * | Caps | Togl | Hue+ | Sat+ | Brt+ | Togl |Breath| Brt+ |      |      |      | Vol+ |
  * |------+------+------+------+------+------|------+------+------+------+------+------|
  * |      |      | RGB  | RGB  | RGB  | WWW  | WWW  |  BL  |      |      |      |      |
- * |Shift | Term | Hue- | Sat- | Brt- | Back | Fwd  | Brt- |      |      |PrScr |VolDn |
+ * |Shift | Term | Hue- | Sat- | Brt- |  <   |  >   | Brt- |      |      |PrScr | Vol- |
  * |------+------+------+------+------+------+------+------+------+------+------+------|
  * |      |||||||| RGB  |      |      |             |      |      |      |      |      |
  * | Ctrl |||Fn||| Mode | Alt  |      |    Space    |MPrev |MStop |MNext |MPlay | Lock |
diff --git a/keyboards/jj40/keymaps/cockpit/readme.md b/keyboards/jj40/keymaps/cockpit/readme.md
new file mode 100644
index 0000000000..37bd47b1d9
--- /dev/null
+++ b/keyboards/jj40/keymaps/cockpit/readme.md
@@ -0,0 +1,56 @@
+# Cockpit custom layout
+
+> This configuration is built around Lithuanian keyboard layout, but you can easily modify it to fit your needs
+
+## Layers
+
+### Default QWERTY
+
+|           |        |        |        |        |        |        |        |        |        |        |           |
+| :-------: | :----: | :----: | :----: | :----: | :----: | :----: | :----: | :----: | :----: | :----: | :-------: |
+|  <br>Esc  | Q<br>q | W<br>w | E<br>e | R<br>r | T<br>t | Y<br>y | U<br>u | I<br>i | O<br>o | P<br>p | <br>Bksp  |
+|  <br>Tab  | A<br>a | S<br>s | D<br>d | F<br>f | G<br>g | H<br>h | J<br>j | K<br>k | L<br>l | :<br>; |  "<br>'   |
+| <br>Shift | Z<br>z | X<br>x | C<br>c | V<br>v | B<br>b | N<br>n | M<br>m | <<br>, | ><br>. | ?<br>/ | <br>Enter |
+|   Ctrl    |   Fn   |  GUI   |  Alt   | Lower  |   Sp   |  ace   | Raise  |  Left  |  Down  |   Up   |   Right   |
+
+### Lower
+
+|           |        |        |        |           |        |        |        |        |        |         |          |
+| :-------: | :----: | :----: | :----: | :-------: | :----: | :----: | :----: | :----: | :----: | :-----: | :------: |
+|  ~<br>\`  | Ą<br>ą | Č<br>č | Ę<br>ę |  Ė<br>ė   | Į<br>į | Š<br>š | Ų<br>ų | Ū<br>ū | Ž<br>ž | \_<br>- | <br>Bksp |
+|  <br>Tab  | <br>!  | <br>@  | <br>#  |   <br>$   | <br>%  | <br>^  | <br>&  | <br>\* | <br>(  |  <br>)  | <br>Del  |
+| <br>Shift | <br>=  | <br>+  | <br>-  |  <br>\|   | {<br>[ | }<br>] | <br><  | <br>>  | <br>{  |  <br>}  | <br>Ins  |
+|   Ctrl    |        |        |  Alt   | **Lower** |   Sp   |  ace   |        |  Home  |  PgDn  |  PgUp   |   End    |
+
+### Raise
+
+|           |        |         |        |        |        |        |           |         |        |        |           |
+| :-------: | :----: | :-----: | :----: | :----: | :----: | :----: | :-------: | :-----: | :----: | :----: | :-------: |
+|  ~<br>\`  | !<br>1 | @<br>2  | #<br>3 | $<br>4 | %<br>5 | ^<br>6 |  &<br>7   | \*<br>8 | (<br>9 | )<br>0 | <br>Bksp  |
+|  <br>Tab  | $<br>4 | %<br>5  | ^<br>6 |        |        |        |           |         |        |        | \|<br>\   |
+| <br>Shift | &<br>7 | \*<br>8 | (<br>9 | )<br>0 |        |        |           | <<br>,  | ><br>. | ?<br>/ | <br>Enter |
+|   Ctrl    |        |         |  Alt   |        |   Sp   |  ace   | **Raise** |  Left   |  Down  |   Up   |   Right   |
+
+### Function
+
+*   Caps does not work. Might be an issue with my laptop, not JJ40 specific.
+*   Backlight breathing does not work.
+*   **Term** button is bound to `Calculator`. I have set this button as a shortcut to open a terminal.
+*   **Lock** is a shortcut for `Alt + L`
+
+|           |             |             |             |             |            |              |            |        |         |         |          |
+| :-------: | :---------: | :---------: | :---------: | :---------: | :--------: | :----------: | :--------: | :----: | :-----: | :-----: | :------: |
+|  <br>F1   |   <br>F2    |   <br>F3    |   <br>F4    |   <br>F5    |   <br>F6   |    <br>F7    |   <br>F8   | <br>F9 | <br>F10 | <br>F11 | <br>F12  |
+| <br>Caps  | RGB<br>Togl | RGB<br>Hue+ | RGB<br>Sat+ | RGB<br>Brt+ | BL<br>Togl | BL<br>Breath | BL<br>Brt+ |        |         |         | <br>Vol+ |
+| <br>Shift |  <br>Term   | RGB<br>Hue- | RGB<br>Sat- | RGB<br>Brt- |  WWW<br><  |   WWW<br>>   | BL<br>Brt- |        |         |  PrScr  | <br>Vol- |
+|   Ctrl    |   **Fn**    | RGB<br>Mode |     Alt     |             |     Sp     |     ace      |   MPrev    | MStop  |  MNext  |  MPlay  |   Lock   |
+
+## Usage
+
+```bash
+cd qmk_firmware
+make jj40:cockpit
+bootloadHID .build/jj40_cockpit.hex
+```
+
+_if you're getting permission errors use sudo_