From a0728672bf07f626049f8dc0007772794ae95ee1 Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Tue, 22 Oct 2013 00:30:43 +0200
Subject: Initial commit for the Creative ZEN and ZEN X-Fi

Change-Id: Ibd7b1b0b957ef11c200cb63eff7da53f11774748
---
 .../target/arm/imx233/creative-zen/backlight-zen.c | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 firmware/target/arm/imx233/creative-zen/backlight-zen.c

(limited to 'firmware/target/arm/imx233/creative-zen/backlight-zen.c')

diff --git a/firmware/target/arm/imx233/creative-zen/backlight-zen.c b/firmware/target/arm/imx233/creative-zen/backlight-zen.c
new file mode 100644
index 0000000000..0d223b52e9
--- /dev/null
+++ b/firmware/target/arm/imx233/creative-zen/backlight-zen.c
@@ -0,0 +1,69 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2013 by 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 "config.h"
+#include "system.h"
+#include "backlight.h"
+#include "lcd.h"
+#include "backlight-target.h"
+#include "uartdbg-imx233.h"
+#include "pinctrl-imx233.h"
+
+void _backlight_set_brightness(int level)
+{
+    unsigned val = (level + 200) * level / 1000;
+    if(level != 0)
+    {
+        for(unsigned mask = 0x10; mask; mask >>= 1)
+            imx233_uartdbg_send((val & mask) ? 0xff : 0xf8);
+        imx233_uartdbg_send(0);
+        imx233_pinctrl_set_gpio(1, 12, true);
+    }
+    else
+        imx233_pinctrl_set_gpio(1, 12, false);
+}
+
+bool _backlight_init(void)
+{
+    imx233_pinctrl_acquire(1, 12, "backlight_enable");
+    imx233_pinctrl_set_function(1, 12, PINCTRL_FUNCTION_GPIO);
+    imx233_pinctrl_enable_gpio(1, 12, true);
+    imx233_uartdbg_init(BAUD_38400);
+    return true;
+}
+
+void _backlight_on(void)
+{
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(true); /* power on lcd + visible display */
+#endif
+    /* restore the previous backlight level */
+    _backlight_set_brightness(backlight_brightness);
+}
+
+void _backlight_off(void)
+{
+    /* there is no real on/off but we can set to 0 brightness */
+    _backlight_set_brightness(0);
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(false); /* power off visible display */
+#endif
+}
-- 
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