From 5cf79723ecb9a22de432d169ce65eb19aa651e8a Mon Sep 17 00:00:00 2001
From: Rafaël Carré <rafael.carre@gmail.com>
Date: Tue, 3 Jan 2012 04:39:56 +0000
Subject: move PP specific files to pp/

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31533 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/pp/i2s-pp.c | 95 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 firmware/target/arm/pp/i2s-pp.c

(limited to 'firmware/target/arm/pp/i2s-pp.c')

diff --git a/firmware/target/arm/pp/i2s-pp.c b/firmware/target/arm/pp/i2s-pp.c
new file mode 100644
index 0000000000..83f39515c4
--- /dev/null
+++ b/firmware/target/arm/pp/i2s-pp.c
@@ -0,0 +1,95 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Portalplayer specific code for I2S
+ *
+ * Based on code from the ipodlinux project - http://ipodlinux.org/
+ * Adapted for Rockbox in December 2005
+ *
+ * Original file: linux/arch/armnommu/mach-ipod/audio.c
+ *
+ * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
+ *
+ * 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 "system.h"
+#include "cpu.h"
+#include "i2s.h"
+#if defined (SANSA_E200) || defined (SANSA_C200)
+#include "audiohw.h"
+#include "pcm_sampr.h"
+#endif
+
+#if CONFIG_CPU == PP5002
+void i2s_reset(void)
+{
+    /* I2S device reset */
+    DEV_RS |= DEV_I2S;
+    DEV_RS &= ~DEV_I2S;
+
+    /* I2S controller enable */
+    IISCONFIG |= IIS_ENABLE;
+
+    /* reset DAC and ADC fifo */
+    IISFIFO_CFG |= IIS_RXCLR | IIS_TXCLR;
+}
+#else /* PP502X */
+
+/*
+ * Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
+ */
+void i2s_reset(void)
+{
+    /* I2S soft reset */
+    IISCONFIG |= IIS_RESET;
+    IISCONFIG &= ~IIS_RESET;
+
+    /* BIT.FORMAT */
+    IISCONFIG = ((IISCONFIG & ~IIS_FORMAT_MASK) | IIS_FORMAT_IIS);
+    /* BIT.SIZE */
+    IISCONFIG = ((IISCONFIG & ~IIS_SIZE_MASK) | IIS_SIZE_16BIT);
+
+    /* FIFO.FORMAT */
+    /* If BIT.SIZE < FIFO.FORMAT low bits will be 0 */
+#ifdef HAVE_AS3514
+    /* AS3514 can only operate as I2S Slave */
+    IISCONFIG |= IIS_MASTER;
+
+    /* Set I2S to 44.1kHz */
+#ifdef PHILIPS_SA9200
+    /* values taken from the SA9200 OF */
+    IISCLK = (IISCLK & ~0x1ff) | 31;
+    IISDIV = (IISDIV & ~0xc0000000) | (2 << 30);
+    IISDIV = (IISDIV & ~0x3f) | 16;
+#elif defined (SANSA_E200) || defined (SANSA_C200)
+    audiohw_set_sampr_dividers(HW_FREQ_DEFAULT);
+#else
+    IISCLK = (IISCLK & ~0x1ff) | 33;
+    IISDIV = 7;
+#endif
+#endif /* HAVE_AS3514 */
+
+    IISCONFIG = ((IISCONFIG & ~IIS_FIFO_FORMAT_MASK) | IIS_FIFO_FORMAT_LE16_2);
+
+    /* RX_ATN_LVL = when 12 slots full */
+    /* TX_ATN_LVL = DMA request when 4 slots empty */
+    IISFIFO_CFG |= IIS_RX_FULL_LVL_12 | IIS_TX_EMPTY_LVL_4;
+
+    /* Rx.CLR = 1, TX.CLR = 1 */
+    IISFIFO_CFG |= IIS_RXCLR | IIS_TXCLR;
+}
+
+#endif /* CONFIG_CPU == */
-- 
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