30 files changed, 1236 insertions, 20 deletions

diff --git a/firmware/SOURCES b/firmware/SOURCES
index 89f4f52895..7be6010ab7 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -113,25 +113,37 @@ target/hosted/sonynwz/nvp-nwz.c
 target/hosted/sonynwz/nwz-db.c
 #endif
 
-#if defined(AGPTEK_ROCKER) && !defined(SIMULATOR)
+#if ((defined(AGPTEK_ROCKER) || defined(XDUOO_X3II) || defined(XDUOO_X20)) && !defined(SIMULATOR))
 drivers/lcd-memframe.c
+target/hosted/alsa-controls.c
+target/hosted/pcm-alsa.c
 target/hosted/backtrace-glibc.c
-target/hosted/kernel-unix.c
 target/hosted/filesystem-unix.c
+target/hosted/kernel-unix.c
 target/hosted/lc-unix.c
-target/hosted/alsa-controls.c
-target/hosted/pcm-alsa.c
-target/hosted/agptek/sysfs.c
-target/hosted/agptek/backlight-agptek.c
+target/hosted/sysfs.c
+target/hosted/backlight-unix.c
+target/hosted/system-hosted.c
+#endif
+
+#if defined(AGPTEK_ROCKER) && !defined(SIMULATOR)
 target/hosted/agptek/button-agptek.c
 target/hosted/agptek/debug-agptek.c
 target/hosted/agptek/lcd-agptek.c
 target/hosted/agptek/power-agptek.c
 target/hosted/agptek/powermgmt-agptek.c
-target/hosted/agptek/system-agptek.c
 target/hosted/agptek/usb-agptek.c
 #endif
 
+#if ((defined(XDUOO_X3II)||defined(XDUOO_X20)) && !defined(SIMULATOR))
+target/hosted/xduoo/button-xduoo.c
+target/hosted/xduoo/debug-xduoo.c
+target/hosted/xduoo/lcd-xduoo.c
+target/hosted/xduoo/power-xduoo.c
+target/hosted/xduoo/powermgmt-xduoo.c
+target/hosted/xduoo/usb-xduoo.c
+#endif
+
 #if defined(SAMSUNG_YPR0) && !defined(SIMULATOR)
 drivers/adc-as3514.c
 #if (CONFIG_RTC == RTC_AS3514)
@@ -502,6 +514,8 @@ target/hosted/alsa-controls.c
 target/hosted/pcm-alsa.c
 #elif defined(HAVE_ROCKER_CODEC) && !defined(SIMULATOR)
 drivers/audio/rocker_codec.c
+#elif defined(HAVE_XDUOO_LINUX_CODEC) && !defined(SIMULATOR)
+drivers/audio/xduoolinux_codec.c
 #elif defined(HAVE_SDL_AUDIO)
 drivers/audio/sdl.c
 #if CONFIG_CODEC == SWCODEC
@@ -584,7 +598,7 @@ target/arm/ipod/powermgmt-ipod-pcf.c
 target/arm/pp/i2c-pp.c
 #elif CONFIG_I2C == I2C_PNX0101
 target/arm/pnx0101/i2c-pnx0101.c
-#elif CONFIG_I2C == I2C_TCC780X || CONFIG_I2C == I2C_TCC77X 
+#elif CONFIG_I2C == I2C_TCC780X || CONFIG_I2C == I2C_TCC77X
 target/arm/i2c-telechips.c
 #elif CONFIG_I2C == I2C_S3C2440
 target/arm/s3c2440/i2c-s3c2440.c
@@ -837,9 +851,9 @@ drivers/isp1583.c
 target/arm/rk27xx/usb-drv-rk27xx.c
 #endif
 #else /* !defined(HAVE_USBSTACK) */
-#if CONFIG_USBOTG == USBOTG_ISP1362      
+#if CONFIG_USBOTG == USBOTG_ISP1362
 drivers/isp1362.c
-#elif CONFIG_USBOTG == USBOTG_M5636      
+#elif CONFIG_USBOTG == USBOTG_M5636
 drivers/m5636.c
 #endif
 #endif /* !defined(HAVE_USBSTACK) */
@@ -1415,7 +1429,7 @@ target/arm/pnx0101/iriver-ifp7xx/button-ifp7xx.c
 target/arm/pnx0101/iriver-ifp7xx/lcd-ifp7xx.c
 target/arm/pnx0101/iriver-ifp7xx/power-ifp7xx.c
 target/arm/pnx0101/iriver-ifp7xx/powermgmt-ifp7xx.c
-target/arm/pnx0101/iriver-ifp7xx/usb-ifp7xx.c   
+target/arm/pnx0101/iriver-ifp7xx/usb-ifp7xx.c
 #ifndef BOOTLOADER
 target/arm/pnx0101/pcm-pnx0101.c
 #endif /* BOOTLOADER */
@@ -1989,7 +2003,7 @@ target/hosted/ibasso/dx90/button-dx90.c
 #ifdef WIN32
 asm/mempcpy.c
 target/hosted/filesystem-win32.c
-#else /* !WIN32 */ 
+#else /* !WIN32 */
 target/hosted/filesystem-unix.c
 #endif /* WIN32 */
 target/hosted/sdl/load_code-sdl.c
diff --git a/firmware/asm/SOURCES b/firmware/asm/SOURCES
index eba5bd2cb6..085b6351a5 100644
--- a/firmware/asm/SOURCES
+++ b/firmware/asm/SOURCES
@@ -15,7 +15,7 @@ mempcpy.c
     defined(CREATIVE_ZVx) || defined(SANSA_CONNECT) || defined(SANSA_FUZEPLUS) || \
     defined(COWON_D2) || defined(MINI2440) || defined(SAMSUNG_YPR0) || \
     defined(SAMSUNG_YPR1) || defined(DX50) || defined(DX90) || (defined(MROBE_500) && !defined(LCD_USE_DMA)) || \
-    defined(CREATIVE_ZEN) || defined(CREATIVE_ZENXFI) || defined(SONY_NWZ_LINUX) || defined(AGPTEK_ROCKER)) && \
+    defined(CREATIVE_ZEN) || defined(CREATIVE_ZENXFI) || defined(SONY_NWZ_LINUX) || defined(AGPTEK_ROCKER) || defined(XDUOO_X3II) || defined(XDUOO_X20)) && \
     !defined(SIMULATOR)
 #if LCD_DEPTH >= 24
 lcd-as-memframe-24bit.c
diff --git a/firmware/drivers/audio/xduoolinux_codec.c b/firmware/drivers/audio/xduoolinux_codec.c
new file mode 100644
index 0000000000..5db4902e5f
--- /dev/null
+++ b/firmware/drivers/audio/xduoolinux_codec.c
@@ -0,0 +1,122 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ *
+ * Copyright (c) 2018 Marcin Bukat
+ * Copyright (c) 2018 Roman Stolyarov
+ *
+ * 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 "config.h"
+#include "audio.h"
+#include "audiohw.h"
+#include "system.h"
+#include "kernel.h"
+#include "panic.h"
+#include "sysfs.h"
+#include "alsa-controls.h"
+
+static int fd_hw;
+
+static void hw_open(void)
+{
+    fd_hw = open("/dev/snd/controlC0", O_RDWR);
+    if(fd_hw < 0)
+        panicf("Cannot open '/dev/snd/controlC0'");
+}
+
+static void hw_close(void)
+{
+    close(fd_hw);
+}
+
+void audiohw_preinit(void)
+{
+    alsa_controls_init();
+    hw_open();
+}
+
+void audiohw_postinit(void)
+{
+    long int ps = 2; // headset
+    int status = 0;
+
+    const char * const sysfs_lo_switch = "/sys/class/switch/lineout/state";
+    const char * const sysfs_hs_switch = "/sys/class/switch/headset/state";
+#ifdef XDUOO_X20
+    const char * const sysfs_bal_switch = "/sys/class/switch/balance/state";
+#endif
+
+#if defined(XDUOO_X3II)
+    alsa_controls_set_bool("AK4490 Soft Mute", true);
+#endif
+
+    sysfs_get_int(sysfs_lo_switch, &status);
+    if (status) ps = 1; // lineout
+
+    sysfs_get_int(sysfs_hs_switch, &status);
+    if (status) ps = 2; // headset
+
+#ifdef XDUOO_X20
+    sysfs_get_int(sysfs_bal_switch, &status);
+    if (status) ps = 3; // balance
+#endif
+
+    /* Output port switch */
+    alsa_controls_set_ints("Output Port Switch", 1, &ps);
+
+#if defined(XDUOO_X3II)
+    alsa_controls_set_bool("AK4490 Soft Mute", false);
+#endif
+}
+
+void audiohw_close(void)
+{
+    hw_close();
+    alsa_controls_close();
+}
+
+void audiohw_set_frequency(int fsel)
+{
+    (void)fsel;
+}
+
+void audiohw_set_volume(int vol_l, int vol_r)
+{
+    long int vol_l_hw = -vol_l/5;
+    long int vol_r_hw = -vol_r/5;
+
+    alsa_controls_set_ints("Left Playback Volume", 1, &vol_l_hw);
+    alsa_controls_set_ints("Right Playback Volume", 1, &vol_r_hw);
+}
+
+void audiohw_set_filter_roll_off(int value)
+{
+    /* 0 = fast (sharp);
+       1 = slow;
+       2 = fast2
+       3 = slow2
+       4 = NOS ? */
+    long int value_hw = value;
+#if defined(XDUOO_X3II)
+    alsa_controls_set_ints("AK4490 Digital Filter", 1, &value_hw);
+#elif defined(XDUOO_X20)
+    alsa_controls_set_ints("ES9018_K2M Digital Filter", 1, &value_hw);
+#else
+    (void)value;
+#endif
+}
diff --git a/firmware/export/audiohw.h b/firmware/export/audiohw.h
index 458fba3412..00bb15812d 100644
--- a/firmware/export/audiohw.h
+++ b/firmware/export/audiohw.h
@@ -224,6 +224,8 @@ struct sound_settings_info
 #include "codec-dx90.h"
 #elif defined(HAVE_ROCKER_CODEC)
 #include "rocker_codec.h"
+#elif defined(HAVE_XDUOO_LINUX_CODEC)
+#include "rocker_codec.h"
 #endif
 
 /* convert caps into defines */
diff --git a/firmware/export/config.h b/firmware/export/config.h
index a41cceff59..c55d489c26 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -171,6 +171,8 @@
 #define XDUOO_X3_PAD       66
 #define IHIFI_770_PAD      67
 #define IHIFI_800_PAD      68
+#define XDUOO_X3II_PAD     69
+#define XDUOO_X20_PAD      70
 
 /* CONFIG_REMOTE_KEYPAD */
 #define H100_REMOTE   1
@@ -624,6 +626,10 @@ Lyre prototype 1 */
 #include "config/agptekrocker.h"
 #elif defined(XDUOO_X3)
 #include "config/xduoox3.h"
+#elif defined(XDUOO_X3II)
+#include "config/xduoox3ii.h"
+#elif defined(XDUOO_X20)
+#include "config/xduoox20.h"
 #else
 /* no known platform */
 #endif
diff --git a/firmware/export/config/agptekrocker.h b/firmware/export/config/agptekrocker.h
index 172e079721..372287f4b5 100644
--- a/firmware/export/config/agptekrocker.h
+++ b/firmware/export/config/agptekrocker.h
@@ -3,7 +3,7 @@
  */
 
 /* For Rolo and boot loader */
-#define MODEL_NUMBER 103//???
+#define MODEL_NUMBER 105
 
 #define MODEL_NAME   "Agptek Rocker"
 
diff --git a/firmware/export/config/xduoox20.h b/firmware/export/config/xduoox20.h
new file mode 100644
index 0000000000..d451ba31f4
--- /dev/null
+++ b/firmware/export/config/xduoox20.h
@@ -0,0 +1,126 @@
+/*
+ * This config file is for the xDuoo X20
+ */
+
+/* For Rolo and boot loader */
+#define MODEL_NUMBER 111
+
+#define MODEL_NAME   "xDuoo X20"
+
+/* LCD dimensions */
+#define LCD_WIDTH  240
+#define LCD_HEIGHT 320
+/* sqrt(240^2 + 320^2) / 2.4 = 166 */
+#define LCD_DPI 166
+
+#ifndef SIMULATOR
+#define CONFIG_PLATFORM (PLATFORM_HOSTED)
+#endif
+
+/* define this if you have a bitmap LCD display */
+#define HAVE_LCD_BITMAP
+
+/* define this if you have a colour LCD */
+#define HAVE_LCD_COLOR
+
+#define HAVE_LCD_ENABLE
+
+/* Define this if the LCD can shut down */
+#define HAVE_LCD_SHUTDOWN
+
+/* define this if you want album art for this target */
+#define HAVE_ALBUMART
+
+/* define this to enable bitmap scaling */
+#define HAVE_BMP_SCALING
+
+/* define this to enable JPEG decoding */
+#define HAVE_JPEG
+
+/* define this if you have access to the quickscreen */
+#define HAVE_QUICKSCREEN
+
+/* define this if you would like tagcache to build on this target */
+#define HAVE_TAGCACHE
+
+#define LCD_DEPTH  32
+/* Check that but should not matter */
+#define LCD_PIXELFORMAT XRGB8888
+
+#define HAVE_BACKLIGHT
+#define HAVE_BACKLIGHT_BRIGHTNESS
+
+/* Main LCD backlight brightness range and defaults: the backlight driver
+ * has levels from 0 to 2555. But 0 is off so start at 1.
+ */
+#define MIN_BRIGHTNESS_SETTING      1
+#define MAX_BRIGHTNESS_SETTING      255
+#define DEFAULT_BRIGHTNESS_SETTING  70
+
+/* Which backlight fading type? */
+#define CONFIG_BACKLIGHT_FADING BACKLIGHT_FADING_SW_SETTING
+
+/* define this if you have a real-time clock */
+#define CONFIG_RTC APPLICATION
+
+/* The number of bytes reserved for loadable codecs */
+#define CODEC_SIZE 0x80000
+
+/* The number of bytes reserved for loadable plugins */
+#define PLUGIN_BUFFER_SIZE 0x100000
+
+/* Define this if you do software codec */
+#define CONFIG_CODEC SWCODEC
+
+#define HAVE_HEADPHONE_DETECTION
+
+/* KeyPad configuration for plugins */
+#define CONFIG_KEYPAD XDUOO_X20_PAD
+
+/* Define this if a programmable hotkey is mapped */
+#define HAVE_HOTKEY
+
+/* define this if the target has volume keys which can be used in the lists */
+#define HAVE_VOLUME_IN_LIST
+
+#ifndef SIMULATOR
+/* We have usb power and can detect usb but it is handled by Linux */
+#define HAVE_USB_POWER
+
+#endif
+
+#define CONFIG_BATTERY_MEASURE PERCENTAGE_MEASURE
+
+/* Linux controlls charging, we can monitor */
+#define CONFIG_CHARGING CHARGING_MONITOR
+
+/* define this if the hardware can be powered off while charging */
+#define HAVE_POWEROFF_WHILE_CHARGING
+
+/* same dimensions as gigabeats */
+#define CONFIG_LCD LCD_INGENIC_LINUX
+
+/* Define this if you have a software controlled poweroff */
+#define HAVE_SW_POWEROFF
+
+/* Define this to the CPU frequency */
+#define CPU_FREQ            504000000
+
+/* No special storage */
+#define CONFIG_STORAGE STORAGE_HOSTFS
+#define HAVE_STORAGE_FLUSH
+
+/* Battery */
+#define BATTERY_TYPES_COUNT  1
+
+/* Audio codec */
+#define HAVE_XDUOO_LINUX_CODEC
+
+/* We don't have hardware controls */
+#define HAVE_SW_TONE_CONTROLS
+
+/* Battery */
+#define BATTERY_CAPACITY_DEFAULT 2400 /* default battery capacity */
+#define BATTERY_CAPACITY_MIN 2400  /* min. capacity selectable */
+#define BATTERY_CAPACITY_MAX 2400 /* max. capacity selectable */
+#define BATTERY_CAPACITY_INC 0   /* capacity increment */
diff --git a/firmware/export/config/xduoox3ii.h b/firmware/export/config/xduoox3ii.h
new file mode 100644
index 0000000000..af63c4f97b
--- /dev/null
+++ b/firmware/export/config/xduoox3ii.h
@@ -0,0 +1,126 @@
+/*
+ * This config file is for the xDuoo X3ii
+ */
+
+/* For Rolo and boot loader */
+#define MODEL_NUMBER 110
+
+#define MODEL_NAME   "xDuoo X3ii"
+
+/* LCD dimensions */
+#define LCD_WIDTH  240
+#define LCD_HEIGHT 320
+/* sqrt(240^2 + 320^2) / 2.4 = 166 */
+#define LCD_DPI 166
+
+#ifndef SIMULATOR
+#define CONFIG_PLATFORM (PLATFORM_HOSTED)
+#endif
+
+/* define this if you have a bitmap LCD display */
+#define HAVE_LCD_BITMAP
+
+/* define this if you have a colour LCD */
+#define HAVE_LCD_COLOR
+
+#define HAVE_LCD_ENABLE
+
+/* Define this if the LCD can shut down */
+#define HAVE_LCD_SHUTDOWN
+
+/* define this if you want album art for this target */
+#define HAVE_ALBUMART
+
+/* define this to enable bitmap scaling */
+#define HAVE_BMP_SCALING
+
+/* define this to enable JPEG decoding */
+#define HAVE_JPEG
+
+/* define this if you have access to the quickscreen */
+#define HAVE_QUICKSCREEN
+
+/* define this if you would like tagcache to build on this target */
+#define HAVE_TAGCACHE
+
+#define LCD_DEPTH  32
+/* Check that but should not matter */
+#define LCD_PIXELFORMAT XRGB8888
+
+#define HAVE_BACKLIGHT
+#define HAVE_BACKLIGHT_BRIGHTNESS
+
+/* Main LCD backlight brightness range and defaults: the backlight driver
+ * has levels from 0 to 2555. But 0 is off so start at 1.
+ */
+#define MIN_BRIGHTNESS_SETTING      1
+#define MAX_BRIGHTNESS_SETTING      255
+#define DEFAULT_BRIGHTNESS_SETTING  70
+
+/* Which backlight fading type? */
+#define CONFIG_BACKLIGHT_FADING BACKLIGHT_FADING_SW_SETTING
+
+/* define this if you have a real-time clock */
+#define CONFIG_RTC APPLICATION
+
+/* The number of bytes reserved for loadable codecs */
+#define CODEC_SIZE 0x80000
+
+/* The number of bytes reserved for loadable plugins */
+#define PLUGIN_BUFFER_SIZE 0x100000
+
+/* Define this if you do software codec */
+#define CONFIG_CODEC SWCODEC
+
+#define HAVE_HEADPHONE_DETECTION
+
+/* KeyPad configuration for plugins */
+#define CONFIG_KEYPAD XDUOO_X3II_PAD
+
+/* Define this if a programmable hotkey is mapped */
+#define HAVE_HOTKEY
+
+/* define this if the target has volume keys which can be used in the lists */
+#define HAVE_VOLUME_IN_LIST
+
+#ifndef SIMULATOR
+/* We have usb power and can detect usb but it is handled by Linux */
+#define HAVE_USB_POWER
+
+#endif
+
+#define CONFIG_BATTERY_MEASURE VOLTAGE_MEASURE
+
+/* Linux controlls charging, we can monitor */
+#define CONFIG_CHARGING CHARGING_MONITOR
+
+/* define this if the hardware can be powered off while charging */
+#define HAVE_POWEROFF_WHILE_CHARGING
+
+/* same dimensions as gigabeats */
+#define CONFIG_LCD LCD_INGENIC_LINUX
+
+/* Define this if you have a software controlled poweroff */
+#define HAVE_SW_POWEROFF
+
+/* Define this to the CPU frequency */
+#define CPU_FREQ            504000000
+
+/* No special storage */
+#define CONFIG_STORAGE STORAGE_HOSTFS
+#define HAVE_STORAGE_FLUSH
+
+/* Battery */
+#define BATTERY_TYPES_COUNT  1
+
+/* Audio codec */
+#define HAVE_XDUOO_LINUX_CODEC
+
+/* We don't have hardware controls */
+#define HAVE_SW_TONE_CONTROLS
+
+/* Battery */
+#define BATTERY_CAPACITY_DEFAULT 2000 /* default battery capacity */
+#define BATTERY_CAPACITY_MIN 2000  /* min. capacity selectable */
+#define BATTERY_CAPACITY_MAX 2000 /* max. capacity selectable */
+#define BATTERY_CAPACITY_INC 0   /* capacity increment */
diff --git a/firmware/export/rbpaths.h b/firmware/export/rbpaths.h
index 165dd37494..b95f1614eb 100644
--- a/firmware/export/rbpaths.h
+++ b/firmware/export/rbpaths.h
@@ -42,7 +42,7 @@
 
 #if !defined(APPLICATION) || defined(SAMSUNG_YPR0) || defined(SAMSUNG_YPR1) || \
     defined(DX50) || defined(DX90) || defined(SONY_NWZ_LINUX) || \
-    defined(AGPTEK_ROCKER)
+    defined(AGPTEK_ROCKER) || defined(XDUOO_X3II) || defined(XDUOO_X20)
 
 #if defined(SAMSUNG_YPR0) || defined(SAMSUNG_YPR1)
 #define HOME_DIR "/mnt/media0"
diff --git a/firmware/export/xduoolinux_codec.h b/firmware/export/xduoolinux_codec.h
new file mode 100644
index 0000000000..ccd49f09aa
--- /dev/null
+++ b/firmware/export/xduoolinux_codec.h
@@ -0,0 +1,7 @@
+#ifndef __XDUOOLINUX_CODEC__
+#define __XDUOOLINUX_CODEC__
+
+#define AUDIOHW_CAPS (FILTER_ROLL_OFF_CAP)
+AUDIOHW_SETTING(VOLUME, "dB", 0, 1, -127,  0, -30)
+AUDIOHW_SETTING(FILTER_ROLL_OFF, "", 0, 1, 0, 4, 0)
+#endif
diff --git a/firmware/target/hosted/agptek/backlight-target.h b/firmware/target/hosted/backlight-target.h
index e3b8a7bd78..e3b8a7bd78 100644
--- a/firmware/target/hosted/agptek/backlight-target.h
+++ b/firmware/target/hosted/backlight-target.h
diff --git a/firmware/target/hosted/agptek/backlight-agptek.c b/firmware/target/hosted/backlight-unix.c
index 2f00787f72..2f00787f72 100644
--- a/firmware/target/hosted/agptek/backlight-agptek.c
+++ b/firmware/target/hosted/backlight-unix.c
diff --git a/firmware/target/hosted/filesystem-app.c b/firmware/target/hosted/filesystem-app.c
index d9fcd64e2d..b49412ea48 100644
--- a/firmware/target/hosted/filesystem-app.c
+++ b/firmware/target/hosted/filesystem-app.c
@@ -36,8 +36,7 @@
 #include "rbpaths.h"
 #include "logf.h"
 
-
-#if defined(AGPTEK_ROCKER) && !defined(BOOTLOADER)
+#if (defined(AGPTEK_ROCKER) || defined(XDUOO_X3II) || defined(XDUOO_X20)) && !defined(BOOTLOADER)
 #define PIVOT_ROOT "/mnt/sd_0"
 #endif
 
@@ -52,7 +51,8 @@ static const char rbhome[] = HOME_DIR;
 #endif
 
 #if !(defined(SAMSUNG_YPR0) || defined(SAMSUNG_YPR1) || defined(DX50) || \
-    defined(SONY_NWZ_LINUX) || defined(DX90) || defined(AGPTEK_ROCKER)) && \
+    defined(SONY_NWZ_LINUX) || defined(DX90) || defined(AGPTEK_ROCKER) || \
+    defined(XDUOO_X3II) || defined(XDUOO_X20)) &&       \
     !defined(__PCTOOL__)
 /* Special dirs are user-accessible (and user-writable) dirs which take priority
  * over the ones where Rockbox is installed to. Classic example would be
diff --git a/firmware/target/hosted/rtc.c b/firmware/target/hosted/rtc.c
index 178e797a8d..488531c77c 100644
--- a/firmware/target/hosted/rtc.c
+++ b/firmware/target/hosted/rtc.c
@@ -42,7 +42,7 @@ int rtc_read_datetime(struct tm *tm)
 
 int rtc_write_datetime(const struct tm *tm)
 {
-#if defined(AGPTEK_ROCKER) && !defined(WIN32)
+#if !defined(WIN32)
     struct timeval tv;
     struct tm *tm_time;
 
diff --git a/firmware/target/hosted/sdl/sim-ui-defines.h b/firmware/target/hosted/sdl/sim-ui-defines.h
index 99ae062595..1e96383682 100644
--- a/firmware/target/hosted/sdl/sim-ui-defines.h
+++ b/firmware/target/hosted/sdl/sim-ui-defines.h
@@ -521,6 +521,7 @@
 #define UI_HEIGHT                   380
 #define UI_LCD_POSX                 29
 #define UI_LCD_POSY                 25
+
 #elif defined(XDUOO_X3)
 #define UI_TITLE                    "xDuoo X3"
 #define UI_WIDTH                    192 /* width of GUI window */
@@ -528,6 +529,20 @@
 #define UI_LCD_POSX                 34
 #define UI_LCD_POSY                 73
 
+#elif defined(XDUOO_X3II)
+#define UI_TITLE                    "xDuoo X3ii"
+#define UI_WIDTH                    322 /* width of GUI window */
+#define UI_HEIGHT                   609 /* height of GUI window */
+#define UI_LCD_POSX                 43
+#define UI_LCD_POSY                 62
+
+#elif defined(XDUOO_X20)
+#define UI_TITLE                    "xDuoo X20"
+#define UI_WIDTH                    322 /* width of GUI window */
+#define UI_HEIGHT                   609 /* height of GUI window */
+#define UI_LCD_POSX                 43
+#define UI_LCD_POSY                 62
+
 #elif defined(IHIFI770)
 #define UI_TITLE                    "iHiFi 770"
 #define UI_WIDTH                    382 /* width of GUI window */
@@ -554,4 +569,3 @@
 #endif
 
 #endif /* #ifndef __UISDL_H__ */
-
diff --git a/firmware/target/hosted/agptek/sysfs.c b/firmware/target/hosted/sysfs.c
index 177f338911..177f338911 100644
--- a/firmware/target/hosted/agptek/sysfs.c
+++ b/firmware/target/hosted/sysfs.c
diff --git a/firmware/target/hosted/agptek/sysfs.h b/firmware/target/hosted/sysfs.h
index 639cc1c409..639cc1c409 100644
--- a/firmware/target/hosted/agptek/sysfs.h
+++ b/firmware/target/hosted/sysfs.h
diff --git a/firmware/target/hosted/agptek/system-agptek.c b/firmware/target/hosted/system-hosted.c
index 7f0949daf2..7f0949daf2 100644
--- a/firmware/target/hosted/agptek/system-agptek.c
+++ b/firmware/target/hosted/system-hosted.c
diff --git a/firmware/target/hosted/xduoo/adc-target.h b/firmware/target/hosted/xduoo/adc-target.h
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/firmware/target/hosted/xduoo/adc-target.h
diff --git a/firmware/target/hosted/xduoo/button-target.h b/firmware/target/hosted/xduoo/button-target.h
new file mode 100644
index 0000000000..6cca5c22a0
--- /dev/null
+++ b/firmware/target/hosted/xduoo/button-target.h
@@ -0,0 +1,46 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2018 by Roman Stolyarov
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef _BUTTON_TARGET_H_
+#define _BUTTON_TARGET_H_
+
+#define HAS_BUTTON_HOLD
+
+/* Main unit's buttons */
+#define BUTTON_POWER      0x00000001
+#define BUTTON_HOME       0x00000002
+#define BUTTON_OPTION     0x00000004
+#define BUTTON_PREV       0x00000008
+#define BUTTON_NEXT       0x00000010
+#define BUTTON_PLAY       0x00000020
+#define BUTTON_VOL_UP     0x00000040
+#define BUTTON_VOL_DOWN   0x00000080
+
+#define BUTTON_LEFT  0
+#define BUTTON_RIGHT 0
+
+#define BUTTON_MAIN  (BUTTON_POWER | BUTTON_HOME | BUTTON_OPTION | BUTTON_PREV | \
+                      BUTTON_NEXT | BUTTON_PLAY | BUTTON_VOL_UP | BUTTON_VOL_DOWN)
+
+/* Software power-off */
+#define POWEROFF_BUTTON BUTTON_POWER
+#define POWEROFF_COUNT  25
+
+#endif /* _BUTTON_TARGET_H_ */
+
diff --git a/firmware/target/hosted/xduoo/button-xduoo.c b/firmware/target/hosted/xduoo/button-xduoo.c
new file mode 100644
index 0000000000..9fd1392b89
--- /dev/null
+++ b/firmware/target/hosted/xduoo/button-xduoo.c
@@ -0,0 +1,202 @@
+/***************************************************************************
+ *             __________               __   ___
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ * Copyright (C) 2018 Roman Stolyarov
+ *
+ * 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 <poll.h>
+//#include <dir.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <linux/input.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "sysfs.h"
+#include "button.h"
+#include "button-target.h"
+#include "panic.h"
+
+#include "kernel.h"
+#include "backlight.h"
+#include "backlight-target.h"
+
+static bool soft_hold = false;
+#ifndef BOOTLOADER
+static unsigned soft_hold_counter = 0;
+#define SOFT_HOLD_BUTTON   BUTTON_POWER
+#define SOFT_HOLD_CNTMAX_1 (HZ)
+#define SOFT_HOLD_CNTMAX_2 (HZ*2)
+#endif
+
+#define NR_POLL_DESC    3
+static struct pollfd poll_fds[NR_POLL_DESC];
+
+static int button_map(int keycode)
+{
+    switch(keycode)
+    {
+        case KEY_BACK:
+            return BUTTON_HOME;
+
+        case KEY_MENU:
+            return BUTTON_OPTION;
+
+        case KEY_UP:
+            return BUTTON_PREV;
+
+        case KEY_DOWN:
+            return BUTTON_NEXT;
+
+        case KEY_ENTER:
+            return BUTTON_PLAY;
+
+        case KEY_VOLUMEUP:
+            return BUTTON_VOL_UP;
+
+        case KEY_VOLUMEDOWN:
+            return BUTTON_VOL_DOWN;
+
+        case KEY_POWER:
+            return BUTTON_POWER;
+
+        default:
+            return 0;
+    }
+}
+
+void button_init_device(void)
+{
+    const char * const input_devs[] = {
+        "/dev/input/event0",
+        "/dev/input/event1",
+        "/dev/input/event2"
+    };
+
+    for(int i = 0; i < NR_POLL_DESC; i++)
+    {
+        int fd = open(input_devs[i], O_RDWR);
+
+        if(fd < 0)
+        {
+            panicf("Cannot open input device: %s\n", input_devs[i]);
+        }
+
+        poll_fds[i].fd = fd;
+        poll_fds[i].events = POLLIN;
+        poll_fds[i].revents = 0;
+    }
+}
+
+int button_read_device(void)
+{
+    static int button_bitmap = 0;
+    struct input_event event;
+
+    /* check if there are any events pending and process them */
+    while(poll(poll_fds, NR_POLL_DESC, 0))
+    {
+        for(int i = 0; i < NR_POLL_DESC; i++)
+        {
+            /* read only if non-blocking */
+            if(poll_fds[i].revents & POLLIN)
+            {
+                int size = read(poll_fds[i].fd, &event, sizeof(event));
+                if(size == (int)sizeof(event))
+                {
+                    int keycode = event.code;
+                    /* event.value == 1 means press
+                     * event.value == 0 means release
+                     */
+                    bool press = event.value ? true : false;
+
+                    /* map linux event code to rockbox button bitmap */
+                    if(press)
+                    {
+                        button_bitmap |= button_map(keycode);
+                    }
+                    else
+                    {
+                        button_bitmap &= ~button_map(keycode);
+                    }
+                }
+            }
+        }
+    }
+
+#ifndef BOOTLOADER
+    if (button_bitmap == SOFT_HOLD_BUTTON) {
+        soft_hold_counter++;
+        if (soft_hold_counter == SOFT_HOLD_CNTMAX_1) {
+            soft_hold = !soft_hold;
+            backlight_hold_changed(soft_hold);
+        }
+        else
+        if (soft_hold_counter == SOFT_HOLD_CNTMAX_2) {
+            soft_hold = false;
+            backlight_hold_changed(soft_hold);
+        }
+    } else {
+        soft_hold_counter = 0;
+    }
+
+    if((soft_hold) && (button_bitmap != SOFT_HOLD_BUTTON)) {
+        return BUTTON_NONE;
+    }
+#endif
+
+    return button_bitmap;
+}
+
+bool headphones_inserted(void)
+{
+    int status = 0;
+    const char * const sysfs_lo_switch = "/sys/class/switch/lineout/state";
+    const char * const sysfs_hs_switch = "/sys/class/switch/headset/state";
+#ifdef XDUOO_X20
+    const char * const sysfs_bal_switch = "/sys/class/switch/balance/state";
+#endif
+
+    sysfs_get_int(sysfs_lo_switch, &status);
+    if (status) return true;
+
+    sysfs_get_int(sysfs_hs_switch, &status);
+    if (status) return true;
+
+#ifdef XDUOO_X20
+    sysfs_get_int(sysfs_bal_switch, &status);
+    if (status) return true;
+#endif
+
+    return false;
+}
+
+void button_close_device(void)
+{
+    /* close descriptors */
+    for(int i = 0; i < NR_POLL_DESC; i++)
+    {
+        close(poll_fds[i].fd);
+    }
+}
+
+bool button_hold(void)
+{
+    return soft_hold;
+}
diff --git a/firmware/target/hosted/xduoo/debug-xduoo.c b/firmware/target/hosted/xduoo/debug-xduoo.c
new file mode 100644
index 0000000000..33f3ac4b97
--- /dev/null
+++ b/firmware/target/hosted/xduoo/debug-xduoo.c
@@ -0,0 +1,6 @@
+#include <stdbool.h>
+
+bool debug_hw_info(void)
+{
+    return false;
+}
diff --git a/firmware/target/hosted/xduoo/lcd-target.h b/firmware/target/hosted/xduoo/lcd-target.h
new file mode 100644
index 0000000000..bb9b77771b
--- /dev/null
+++ b/firmware/target/hosted/xduoo/lcd-target.h
@@ -0,0 +1,32 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef __LCD_TARGET_H__
+#define __LCD_TARGET_H__
+
+/* needs special ioctl() to redraw updated framebuffer content */
+#define LCD_OPTIMIZED_UPDATE
+#define LCD_OPTIMIZED_UPDATE_RECT
+
+extern fb_data *framebuffer; /* see lcd-xduoo.c */
+#define LCD_FRAMEBUF_ADDR(col, row) (framebuffer + (row)*LCD_WIDTH + (col))
+
+extern void lcd_set_active(bool active);
+#endif /* __LCD_TARGET_H__ */
diff --git a/firmware/target/hosted/xduoo/lcd-xduoo.c b/firmware/target/hosted/xduoo/lcd-xduoo.c
new file mode 100644
index 0000000000..4b3148da03
--- /dev/null
+++ b/firmware/target/hosted/xduoo/lcd-xduoo.c
@@ -0,0 +1,140 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * 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 <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <linux/fb.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include "lcd.h"
+#include "lcd-target.h"
+#include "backlight-target.h"
+#include "sysfs.h"
+#include "panic.h"
+
+static int fd = -1;
+static struct fb_var_screeninfo vinfo;
+fb_data *framebuffer = 0; /* global variable, see lcd-target.h */
+
+void lcd_init_device(void)
+{
+    const char * const fb_dev = "/dev/fb0";
+    fd = open(fb_dev, O_RDWR);
+    if(fd < 0)
+    {
+        panicf("Cannot open framebuffer: %s\n", fb_dev);
+    }
+
+    /* get fixed and variable information */
+    struct fb_fix_screeninfo finfo;
+    if(ioctl(fd, FBIOGET_FSCREENINFO, &finfo) < 0)
+    {
+        panicf("Cannot read framebuffer fixed information");
+    }
+
+    if(ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) < 0)
+    {
+        panicf("Cannot read framebuffer variable information");
+    }
+
+#if 0
+    /* check resolution and framebuffer size */
+    if(vinfo.xres != LCD_WIDTH || vinfo.yres != LCD_HEIGHT || vinfo.bits_per_pixel != LCD_DEPTH)
+    {
+        panicf("Unexpected framebuffer resolution: %dx%dx%d\n", vinfo.xres,
+            vinfo.yres, vinfo.bits_per_pixel);
+    }
+#endif
+    /* Note: we use a framebuffer size of width*height*bbp. We cannot trust the
+     * values returned by the driver for line_length */
+
+    /* map framebuffer */
+    framebuffer = mmap(0, FRAMEBUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+    if((void *)framebuffer == MAP_FAILED)
+    {
+        panicf("Cannot map framebuffer");
+    }
+
+#ifdef HAVE_LCD_ENABLE
+    lcd_set_active(true);
+#endif
+}
+
+#ifdef HAVE_LCD_SHUTDOWN
+void lcd_shutdown(void)
+{
+    munmap(framebuffer, FRAMEBUFFER_SIZE);
+    close(fd);
+}
+#endif
+
+void lcd_enable(bool on)
+{
+    const char * const sysfs_fb_blank = "/sys/class/graphics/fb0/blank";
+
+    if (lcd_active() != on)
+    {
+        sysfs_set_int(sysfs_fb_blank, on ? 0 : 1);
+        lcd_set_active(on);
+
+        if (on)
+        {
+            send_event(LCD_EVENT_ACTIVATION, NULL);
+        }
+    }
+}
+
+static void redraw(void)
+{
+    ioctl(fd, FBIOPAN_DISPLAY, &vinfo);
+}
+
+extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
+                                 int width, int height);
+
+void lcd_update(void)
+{
+    /* Copy the Rockbox framebuffer to the second framebuffer */
+    lcd_copy_buffer_rect(LCD_FRAMEBUF_ADDR(0, 0), FBADDR(0,0),
+                         LCD_WIDTH*LCD_HEIGHT, 1);
+    redraw();
+}
+
+void lcd_update_rect(int x, int y, int width, int height)
+{
+    fb_data *dst = LCD_FRAMEBUF_ADDR(x, y);
+    fb_data * src = FBADDR(x,y);
+
+    /* Copy part of the Rockbox framebuffer to the second framebuffer */
+    if (width < LCD_WIDTH)
+    {
+        /* Not full width - do line-by-line */
+        lcd_copy_buffer_rect(dst, src, width, height);
+    }
+    else
+    {
+        /* Full width - copy as one line */
+        lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
+    }
+    redraw();
+}
diff --git a/firmware/target/hosted/xduoo/power-xduoo.c b/firmware/target/hosted/xduoo/power-xduoo.c
new file mode 100644
index 0000000000..97a8dd4779
--- /dev/null
+++ b/firmware/target/hosted/xduoo/power-xduoo.c
@@ -0,0 +1,74 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 by Marcin Bukat
+ *
+ * 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 <sys/types.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "system.h"
+#include "power-xduoo.h"
+#include "power.h"
+#include "panic.h"
+#include "sysfs.h"
+
+const char * const sysfs_bat_voltage =
+    "/sys/class/power_supply/battery/voltage_now";
+
+const char * const sysfs_bat_capacity =
+    "/sys/class/power_supply/battery/capacity";
+
+const char * const sysfs_bat_status =
+    "/sys/class/power_supply/battery/status";
+
+const char * const sysfs_pow_supply =
+    "/sys/class/power_supply/usb/present";
+
+unsigned int xduoo_power_input_status(void)
+{
+    int present = 0;
+    sysfs_get_int(sysfs_pow_supply, &present);
+
+    return present ? POWER_INPUT_USB_CHARGER : POWER_INPUT_NONE;
+}
+
+bool xduoo_power_charging_status(void)
+{
+    char buf[12] = {0};
+    sysfs_get_string(sysfs_bat_status, buf, sizeof(buf));
+
+    return (strncmp(buf, "Charging", 8) == 0);
+}
+
+unsigned int xduoo_power_get_battery_voltage(void)
+{
+    int battery_voltage;
+    sysfs_get_int(sysfs_bat_voltage, &battery_voltage);
+
+    return battery_voltage/1000;
+}
+
+unsigned int xduoo_power_get_battery_capacity(void)
+{
+    int battery_capacity;
+    sysfs_get_int(sysfs_bat_capacity, &battery_capacity);
+
+    return battery_capacity;
+}
diff --git a/firmware/target/hosted/xduoo/power-xduoo.h b/firmware/target/hosted/xduoo/power-xduoo.h
new file mode 100644
index 0000000000..d573865ed2
--- /dev/null
+++ b/firmware/target/hosted/xduoo/power-xduoo.h
@@ -0,0 +1,31 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 by Marcin Bukat
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef _POWER_XDUOO_H_
+#define _POWER_XDUOO_H_
+
+#include <stdbool.h>
+#include "config.h"
+
+unsigned int xduoo_power_input_status(void);
+bool xduoo_power_charging_status(void);
+unsigned int xduoo_power_get_battery_voltage(void);
+unsigned int xduoo_power_get_battery_capacity(void);
+#endif /* _POWER_XDUOO_H_ */
+
diff --git a/firmware/target/hosted/xduoo/powermgmt-xduoo.c b/firmware/target/hosted/xduoo/powermgmt-xduoo.c
new file mode 100644
index 0000000000..30001934ba
--- /dev/null
+++ b/firmware/target/hosted/xduoo/powermgmt-xduoo.c
@@ -0,0 +1,70 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ *
+ * 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 "powermgmt.h"
+#include "power.h"
+#include "power-xduoo.h"
+
+const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
+{
+    3470
+};
+
+/* the OF shuts down at this voltage */
+const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
+{
+    3400
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
+const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
+{
+    { 3400, 3639, 3697, 3723, 3757, 3786, 3836, 3906, 3980, 4050, 4159 }
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
+const unsigned short const percent_to_volt_charge[11] =
+{
+      3485, 3780, 3836, 3857, 3890, 3930, 3986, 4062, 4158, 4185, 4196
+};
+
+unsigned int power_input_status(void)
+{
+    /* POWER_INPUT_USB_CHARGER, POWER_INPUT_NONE */
+    return xduoo_power_input_status();
+}
+
+#if defined(XDUOO_X3II)
+int _battery_voltage(void)
+{
+    return xduoo_power_get_battery_voltage();
+}
+#endif
+
+#if defined(XDUOO_X20)
+int _battery_level(void)
+{
+    return xduoo_power_get_battery_capacity();
+}
+#endif
+
+bool charging_state(void)
+{
+    return xduoo_power_charging_status();
+}
diff --git a/firmware/target/hosted/xduoo/system-target.h b/firmware/target/hosted/xduoo/system-target.h
new file mode 100644
index 0000000000..830f19fde4
--- /dev/null
+++ b/firmware/target/hosted/xduoo/system-target.h
@@ -0,0 +1,28 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef __SYSTEM_TARGET_H__
+#define __SYSTEM_TARGET_H__
+
+#include "kernel-unix.h"
+#include "system-hosted.h"
+
+#define NEED_GENERIC_BYTESWAPS
+#endif /* __SYSTEM_TARGET_H__ */
diff --git a/firmware/target/hosted/xduoo/usb-xduoo.c b/firmware/target/hosted/xduoo/usb-xduoo.c
new file mode 100644
index 0000000000..19248ad262
--- /dev/null
+++ b/firmware/target/hosted/xduoo/usb-xduoo.c
@@ -0,0 +1,118 @@
+/***************************************************************************
+ *             __________               __   ___
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2018 by Marcin Bukat
+ *
+ * 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 <stdlib.h>
+#include <sys/mount.h>
+#include <string.h>
+#include "config.h"
+#include "disk.h"
+#include "usb.h"
+#include "sysfs.h"
+#include "power.h"
+#include "power-xduoo.h"
+
+static bool adb_mode = false;
+
+/* TODO: implement usb detection properly */
+int usb_detect(void)
+{
+    return power_input_status() == POWER_INPUT_USB_CHARGER ? USB_INSERTED : USB_EXTRACTED;
+}
+
+void usb_enable(bool on)
+{
+    /* Ignore usb enable/disable when ADB is enabled so we can fireup adb shell
+     * without entering ums mode
+     */
+    if (!adb_mode)
+    {
+        sysfs_set_int("/sys/class/android_usb/android0/enable", on ? 1 : 0);
+    }
+}
+
+/* This is called by usb thread after usb extract in order to return
+ * regular FS access
+ *
+ * returns the # of successful mounts
+*/
+int disk_mount_all(void)
+{
+    const char *dev[] = {"/dev/mmcblk0p1", "/dev/mmcblk0"};
+    const char *fs[] = {"vfat", "exfat"};
+
+    sysfs_set_string("/sys/class/android_usb/android0/f_mass_storage/lun/file", "");
+
+    for (int i=0; i<2; i++)
+    {
+        for (int j=0; j<2; j++)
+        {
+            if (mount(dev[i], "/mnt/sd_0", fs[j], 0, NULL) == 0)
+            {
+                return 1;
+            }
+         }
+    }
+
+    return 0;
+}
+
+/* This is called by usb thread after all threads ACKs usb inserted message
+ *
+ * returns the # of successful unmounts
+ */
+int disk_unmount_all(void)
+{
+    if (umount("/mnt/sd_0") == 0)
+    {
+        sysfs_set_string("/sys/class/android_usb/android0/f_mass_storage/lun/file", "/dev/mmcblk0");
+        return 1;
+    }
+
+    return 0;
+}
+
+void usb_init_device(void)
+{
+    char functions[32] = {0};
+
+    /* Check if ADB was activated in bootloader */
+    sysfs_get_string("/sys/class/android_usb/android0/functions", functions, sizeof(functions));
+    adb_mode = (strstr(functions, "adb") == NULL) ? false : true;
+
+    usb_enable(false);
+
+    if (adb_mode)
+    {
+        sysfs_set_string("/sys/class/android_usb/android0/functions", "mass_storage,adb");
+        sysfs_set_string("/sys/class/android_usb/android0/idVendor", "18D1");
+        sysfs_set_string("/sys/class/android_usb/android0/idProduct", "D002");
+    }
+    else
+    {
+        sysfs_set_string("/sys/class/android_usb/android0/functions", "mass_storage");
+        sysfs_set_string("/sys/class/android_usb/android0/idVendor", "C502");
+        sysfs_set_string("/sys/class/android_usb/android0/idProduct", "0029");
+    }
+
+    sysfs_set_string("/sys/class/android_usb/android0/iManufacturer", "Rockbox.org");
+    sysfs_set_string("/sys/class/android_usb/android0/iProduct", "Rockbox media player");
+    sysfs_set_string("/sys/class/android_usb/android0/iSerial", "0123456789ABCDEF");
+    sysfs_set_string("/sys/class/android_usb/android0/f_mass_storage/inquiry_string", "xDuoo 0100");
+}
diff --git a/firmware/target/hosted/xduoo/xduoo.make b/firmware/target/hosted/xduoo/xduoo.make
new file mode 100644
index 0000000000..5c37d27412
--- /dev/null
+++ b/firmware/target/hosted/xduoo/xduoo.make
@@ -0,0 +1,52 @@
+#             __________               __   ___.
+#   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+#   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+#   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+#   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+#                     \/            \/     \/    \/            \/
+# $Id$
+#
+
+INCLUDES += -I$(FIRMDIR)/include -I$(FIRMDIR)/export $(TARGET_INC) -I$(BUILDDIR) -I$(APPSDIR)
+
+SIMFLAGS += $(INCLUDES) $(DEFINES) -DHAVE_CONFIG_H $(GCCOPTS)
+
+# bootloader build is sligtly different
+ifneq (,$(findstring bootloader,$(APPSDIR)))
+
+SRC += $(call preprocess, $(APPSDIR)/SOURCES)
+CLEANOBJS += $(BUILDDIR)/bootloader.*
+
+endif #bootloader
+
+.SECONDEXPANSION: # $$(OBJ) is not populated until after this
+
+ifneq (,$(findstring bootloader,$(APPSDIR)))
+# bootloader build
+
+$(BUILDDIR)/bootloader.elf : $$(OBJ) $(FIRMLIB) $(CORE_LIBS)
+        $(call PRINTS,LD $(@F))$(CC) $(GCCOPTS) -Os -o $@ $(OBJ) \
+                -L$(BUILDDIR)/firmware -lfirmware \
+                -L$(BUILDDIR)/lib $(call a2lnk,$(CORE_LIBS)) \
+                $(LDOPTS) $(GLOBAL_LDOPTS) -Wl,--gc-sections -Wl,-Map,$(BUILDDIR)/bootloader.map
+
+$(BUILDDIR)/$(BINARY): $(BUILDDIR)/bootloader.elf
+        $(call PRINTS,OC $(@F))$(call objcopy,$^,$@)
+
+else
+# rockbox app build
+
+$(BUILDDIR)/rockbox.elf : $$(OBJ) $(FIRMLIB) $(VOICESPEEXLIB) $(CORE_LIBS)
+        $(call PRINTS,LD $(@F))$(CC) $(GCCOPTS) -Os -o $@ $(OBJ) \
+                -L$(BUILDDIR)/firmware -lfirmware \
+                -L$(RBCODEC_BLD)/codecs $(call a2lnk, $(VOICESPEEXLIB)) \
+                -L$(BUILDDIR)/lib $(call a2lnk,$(CORE_LIBS)) \
+                $(LDOPTS) $(GLOBAL_LDOPTS) -Wl,-Map,$(BUILDDIR)/rockbox.map
+
+$(BUILDDIR)/rockbox.x3ii : $(BUILDDIR)/rockbox.elf
+        $(call PRINTS,OC $(@F))$(call objcopy,$^,$@)
+
+$(BUILDDIR)/rockbox.x20 : $(BUILDDIR)/rockbox.elf
+        $(call PRINTS,OC $(@F))$(call objcopy,$^,$@)
+
+endif