Clip: add backlight and buttonlight code

Revive lcd_enable() as well, and use it in _backlight_on/off()
Don't update the lcd framebuffer if the display is off

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18952 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 58 insertions, 0 deletions

diff --git a/firmware/target/arm/as3525/sansa-clip/backlight-clip.c b/firmware/target/arm/as3525/sansa-clip/backlight-clip.c
new file mode 100644
index 0000000000..2064f0992f
--- /dev/null
+++ b/firmware/target/arm/as3525/sansa-clip/backlight-clip.c
@@ -0,0 +1,58 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright © 2008 Rafaël Carré
+ *
+ * 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 "backlight-target.h"
+#include "as3525.h"
+
+/* TODO : backlight brightness */
+
+/* XXX : xpd is used for SD/MCI interface
+ * If interrupts are used to access this interface, they should be
+ * disabled in _buttonlight_on/off ()
+ */
+
+void _buttonlight_on(void)
+{
+    int saved_ccu_io;
+
+    saved_ccu_io = CCU_IO;  /* save XPD setting */
+
+    CCU_IO &= ~(3<<2);      /* setup xpd as GPIO */
+
+    GPIOD_DIR |= (1<<7);
+    GPIOD_PIN(7) = (1<<7);  /* set pin d7 high */
+
+    CCU_IO = saved_ccu_io;  /* restore the previous XPD setting */
+}
+
+void _buttonlight_off(void)
+{
+    int saved_ccu_io;
+
+    saved_ccu_io = CCU_IO;  /* save XPD setting */
+
+    CCU_IO &= ~(3<<2);      /* setup xpd as GPIO */
+
+    GPIOD_DIR |= (1<<7);
+    GPIOD_PIN(7) = 0;       /* set pin d7 low */
+
+    CCU_IO = saved_ccu_io;  /* restore the previous XPD setting */
+}