New port: Shanling Q1 native

- Audio playback works
- Touchscreen and buttons work
- Bootloader works and is capable of dual boot
- Plugins are working
- Cabbiev2 theme has been ported
- Stable for general usage

Thanks to Marc Aarts for porting Cabbiev2 and plugin bitmaps.

There's a few minor known issues:

- Bootloader must be installed manually using 'usbboot' as there is
  no support in jztool yet.

- Keymaps may be lacking, need further testing and feedback.

- Some plugins may not be fully adapted to the screen size and could
  benefit from further tweaking.

- LCD shows abnormal effects under some circumstances: for example,
  after viewing a mostly black screen an afterimage appears briefly
  when going back to a brightly-lit screen. Sudden power-off without
  proper shutdown of the backlight causes a "dissolving" effect.

- CW2015 battery reporting driver is buggy, and disabled for now.
  Battery reporting is currently voltage-based using the AXP192.

Change-Id: I635e83f02a880192c5a82cb0861ad3a61c137c3a

uisimulator/buttonmap/SOURCES

@@ -85,5 +85,7 @@ ihifi2.c
 erosq.c
 #elif CONFIG_KEYPAD == FIIO_M3K_PAD
 fiio-m3k.c
+#elif CONFIG_KEYPAD == SHANLING_Q1_PAD
+shanling-q1.c
 #endif
 #endif /* SIMULATOR */

uisimulator/buttonmap/shanling-q1.c

@@ -0,0 +1,72 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2021 by Aidan MacDonald
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+
+#include <SDL.h>
+#include "button.h"
+#include "buttonmap.h"
+
+int key_to_button(int keyboard_button)
+{
+    int new_btn = BUTTON_NONE;
+    switch (keyboard_button)
+    {
+        case SDLK_KP8:
+        case SDLK_UP:
+            new_btn = BUTTON_PREV;
+            break;
+
+        case SDLK_KP2:
+        case SDLK_DOWN:
+            new_btn = BUTTON_NEXT;
+            break;
+
+        case SDLK_KP5:
+        case SDLK_RETURN:
+        case SDLK_SPACE:
+            new_btn = BUTTON_PLAY;
+            break;
+
+        case SDLK_ESCAPE:
+            new_btn = BUTTON_POWER;
+            break;
+
+        case SDLK_KP_PLUS:
+        case SDLK_EQUALS:
+            new_btn = BUTTON_VOL_UP;
+            break;
+
+        case SDLK_KP_MINUS:
+        case SDLK_MINUS:
+            new_btn = BUTTON_VOL_DOWN;
+            break;
+    }
+    return new_btn;
+}
+
+struct button_map bm[] = {
+    { SDLK_KP_PLUS,  426, 140, 40, "Volume +" },
+    { SDLK_KP_MINUS, 426, 180, 40, "Volume -" },
+    { SDLK_SPACE,      0, 244, 40, "Play" },
+    { SDLK_UP,         0, 133, 40, "Previous" },
+    { SDLK_DOWN,       0, 357, 40, "Next" },
+    { 0, 0, 0, 0, "None" }
+};