xDuoo X3II and X20 port

Provided by Roman Stolyarov
Integration, Refactoring, and Upstreaming by Solomon Peachy

X3II confirmed working by forum tester, X20 is nearly identical.

This includes bootloader, main firmware, and the flash image patcher.

Eventual Todo:

 * Further refactor AGPTek Rocker & xduoo hiby bootloaders
 * Further refactor AGPTek Rocker & xduoo hosted platform code

Change-Id: I34a674051d368efcc75d1d18c725971fe46c3eee

1 files changed, 64 insertions, 0 deletions

diff --git a/firmware/target/hosted/backlight-unix.c b/firmware/target/hosted/backlight-unix.c
new file mode 100644
index 0000000000..2f00787f72
--- /dev/null
+++ b/firmware/target/hosted/backlight-unix.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *             __________               __   ___
+ *   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 <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include "config.h"
+#include "backlight-target.h"
+#include "sysfs.h"
+#include "panic.h"
+
+static const char * const sysfs_bl_brightness =
+    "/sys/class/backlight/pwm-backlight.0/brightness";
+
+static const char * const sysfs_bl_power =
+    "/sys/class/backlight/pwm-backlight.0/bl_power";
+
+bool backlight_hw_init(void)
+{
+    backlight_hw_on();
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    return true;
+}
+
+void backlight_hw_on(void)
+{
+    sysfs_set_int(sysfs_bl_power, 0);
+}
+
+void backlight_hw_off(void)
+{
+    sysfs_set_int(sysfs_bl_power, 1);
+}
+
+void backlight_hw_brightness(int brightness)
+{
+    /* cap range, just in case */
+    if (brightness > MAX_BRIGHTNESS_SETTING)
+        brightness = MAX_BRIGHTNESS_SETTING;
+    if (brightness < MIN_BRIGHTNESS_SETTING)
+        brightness = MIN_BRIGHTNESS_SETTING;
+
+    sysfs_set_int(sysfs_bl_brightness, brightness);
+}