1 files changed, 85 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c b/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c
new file mode 100644
index 0000000000..59c3c133aa
--- /dev/null
+++ b/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c
@@ -0,0 +1,85 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2012 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 "lcd.h"
+#include "backlight.h"
+#include "backlight-target.h"
+#include "pwm-imx233.h"
+#include "mpr121.h"
+
+void _backlight_set_brightness(int brightness)
+{
+    imx233_pwm_setup_channel(2, 1024, HW_PWM_PERIODx__CDIV__DIV_1,
+        0, HW_PWM_PERIODx__STATE__HIGH,
+        (brightness * 1024) / 100, HW_PWM_PERIODx__STATE__LOW);
+    imx233_pwm_enable_channel(2, true);
+}
+
+bool _backlight_init(void)
+{
+    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    return true;
+}
+
+void _backlight_on(void)
+{
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(true); /* power on lcd + visible display */
+#endif
+    /* don't do anything special, the core will set the 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
+}
+
+/* ELE8 is the button light GPIO */
+void _buttonlight_on(void)
+{
+    /* assume mpr121 was initialized by button-zenxfi3.c */
+    mpr121_set_gpio_output(8, ELE_GPIO_SET);
+}
+
+void _buttonlight_off(void)
+{
+    /* assume mpr121 was initialized by button-zenxfi3.c */
+    mpr121_set_gpio_output(8, ELE_GPIO_CLR);
+}
+
+void _buttonlight_set_brightness(int brightness)
+{
+    /* assume mpr121 was initialized by button-zenxfi3.c */
+    /* since backlight brightness is the same for the screen and the button light,
+     * map [MIN_BRIGHTNESS_SETTING,MAX_BRIGHTNESS_SETTING] to
+     * [ELE_PWM_MIN_DUTY,ELE_PWM_MAX_DUTY] */
+    brightness = ELE_PWM_MIN_DUTY + (brightness - MIN_BRIGHTNESS_SETTING) *
+        (ELE_PWM_MAX_DUTY - ELE_PWM_MIN_DUTY + 1) /
+        (MAX_BRIGHTNESS_SETTING - MIN_BRIGHTNESS_SETTING + 1);
+    brightness = MIN(brightness, ELE_PWM_MAX_DUTY);
+    mpr121_set_gpio_pwm(8, brightness);
+}