1 files changed, 88 insertions, 0 deletions

diff --git a/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c b/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c
new file mode 100644
index 0000000000..551b386f19
--- /dev/null
+++ b/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c
@@ -0,0 +1,88 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2011 by Lorenzo Miori
+ *
+ * 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 "system.h"
+#include "backlight.h"
+#include "backlight-target.h"
+#include "lcd.h"
+#include "as3514.h"
+#include "ascodec.h"
+#include <fcntl.h>
+#include "unistd.h"
+
+static bool backlight_on_status = true; /* Is on or off? */
+
+/*TODO: see if LCD sleep could be implemented in a better way -> ie using a rockbox feature */
+/* Turn off LCD power supply */
+static void _backlight_lcd_sleep(void)
+{
+    int fp = open("/sys/class/graphics/fb0/blank", O_RDWR);
+    write(fp, "1", 1);
+    close(fp);
+}
+/* Turn on LCD screen */
+static void _backlight_lcd_power(void)
+{
+    int fp = open("/sys/class/graphics/fb0/blank", O_RDWR);
+    write(fp, "0", 1);
+    close(fp);
+}
+
+bool _backlight_init(void)
+{
+    /* We have nothing to do */
+    return true;
+}
+
+void _backlight_on(void)
+{
+    if (!backlight_on_status)
+    {
+        /* Turn on lcd power before backlight */
+        _backlight_lcd_power();
+        /* Original app sets this to 0xb1 when backlight is on... */
+        ascodec_write_pmu(AS3543_BACKLIGHT, 0x1, 0xb1);
+    }
+
+    backlight_on_status = true;
+
+}
+
+void _backlight_off(void)
+{
+    if (backlight_on_status) {
+        /* Disabling the DCDC15 completely, keeps brightness register value */
+        ascodec_write_pmu(AS3543_BACKLIGHT, 0x1, 0x00);
+        /* Turn off lcd power then */
+        _backlight_lcd_sleep();
+    }
+
+    backlight_on_status = false;
+}
+
+void _backlight_set_brightness(int brightness)
+{
+    /* Just another check... */
+    if (brightness > MAX_BRIGHTNESS_SETTING)
+        brightness = MAX_BRIGHTNESS_SETTING;
+    if (brightness < MIN_BRIGHTNESS_SETTING)
+        brightness = MIN_BRIGHTNESS_SETTING;
+    ascodec_write_pmu(AS3543_BACKLIGHT, 0x3, brightness << 3 & 0xf8);
+}