From e8a8a1be43afe63079ae48ce1a9eb3052df3b1a4 Mon Sep 17 00:00:00 2001
From: Tomasz Moń <desowin@gmail.com>
Date: Wed, 16 Nov 2011 14:08:01 +0000
Subject: Sandisk Sansa Connect port (FS #12363)

Included are drivers for buttons, backlight, lcd, audio and storage.



git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31000 a1c6a512-1295-4272-9138-f99709370657
---
 .../sansa-connect/backlight-sansaconnect.c         | 93 ++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c

(limited to 'firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c')

diff --git a/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c b/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c
new file mode 100644
index 0000000000..b7989849d7
--- /dev/null
+++ b/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c
@@ -0,0 +1,93 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "cpu.h"
+#include "system.h"
+#include "backlight-target.h"
+#include "backlight.h"
+#include "lcd.h"
+#include "power.h"
+#include "spi-target.h"
+#include "lcd-target.h"
+
+static void _backlight_write_brightness(int brightness)
+{
+    /*
+       Maps brightness int to percentage value found in OF
+
+       OF   PWM1H
+       5%   14
+       10%  140
+       15%  210
+       20%  280
+       ...
+       95%  1330
+       100% 1400
+    */
+    if (brightness > 20)
+        brightness = 20;
+    else if (brightness < 0)
+        brightness = 0;
+
+    IO_CLK_PWM1H = brightness*70;
+}
+
+void _backlight_on(void)
+{
+    /* set GIO34 as PWM1 */
+    IO_GIO_FSEL3 = (IO_GIO_FSEL3 & 0xFFF3) | (1 << 2);
+
+#if (CONFIG_BACKLIGHT_FADING == BACKLIGHT_NO_FADING)
+    _backlight_write_brightness(backlight_brightness);
+#endif
+}
+
+void _backlight_off(void)
+{
+    _backlight_write_brightness(0);
+
+    bitclr16(&IO_GIO_FSEL3, 0xC); /* set GIO34 to normal GIO */
+    bitclr16(&IO_GIO_INV2, (1 << 2)); /* make sure GIO34 is not inverted */
+    IO_GIO_BITCLR2 = (1 << 2); /* drive GIO34 low */
+}
+
+/* Assumes that the backlight has been initialized */
+void _backlight_set_brightness(int brightness)
+{
+    _backlight_write_brightness(brightness);
+}
+
+void __backlight_dim(bool dim_now)
+{
+    _backlight_set_brightness(dim_now ?
+        DEFAULT_BRIGHTNESS_SETTING :
+        DEFAULT_DIMNESS_SETTING);
+}
+
+bool _backlight_init(void)
+{
+    IO_CLK_PWM1C = 0x58D; /* as found in OF */
+
+    _backlight_set_brightness(backlight_brightness);
+    return true;
+}
+
-- 
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