Abstract the PortalPlayer AS3514 handling with an "ascodec" API - inspired by the wmcodec API used with the Wolfson codecs. The intention is to implement this API for the AS3525 and then share code with the Sansa V2 ports.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18940 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 66 insertions, 0 deletions

diff --git a/firmware/target/arm/ascodec-pp.c b/firmware/target/arm/ascodec-pp.c
new file mode 100644
index 0000000000..30b6b1f8de
--- /dev/null
+++ b/firmware/target/arm/ascodec-pp.c
@@ -0,0 +1,66 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Driver for AS3514 audio codec
+ *
+ * Copyright (c) 2007 Daniel Ankers
+ * Copyright (c) 2007 Christian Gmeiner
+ *
+ * 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 "cpu.h"
+#include "system.h"
+
+#include "audiohw.h"
+#include "i2s.h"
+
+/*
+ * Initialise the PP I2C and I2S.
+ */
+void audiohw_init(void)
+{
+    /* normal outputs for CDI and I2S pin groups */
+    DEV_INIT2 &= ~0x300;
+
+    /*mini2?*/
+    DEV_INIT1 &=~0x3000000;
+    /*mini2?*/
+
+    /* device reset */
+    DEV_RS |= DEV_I2S;
+    DEV_RS &=~DEV_I2S;
+
+    /* I2S device reset */
+    DEV_RS |= DEV_I2S;
+    DEV_RS &=~DEV_I2S;
+
+    /* I2S device enable */
+    DEV_EN |= DEV_I2S;
+
+    /* enable external dev clock clocks */
+    DEV_EN |= DEV_EXTCLOCKS;
+
+    /* external dev clock to 24MHz */
+    outl(inl(0x70000018) & ~0xc, 0x70000018);
+
+    i2s_reset();
+
+    audiohw_preinit();
+}
+
+void audiohw_postinit(void)
+{
+}