generalise the wolfson codec code a bit

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11277 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 156 insertions, 0 deletions

diff --git a/firmware/target/arm/wmcodec-pp.c b/firmware/target/arm/wmcodec-pp.c
new file mode 100644
index 0000000000..e9626220e7
--- /dev/null
+++ b/firmware/target/arm/wmcodec-pp.c
@@ -0,0 +1,156 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Portalplayer specific code for Wolfson audio codecs
+ *
+ * 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)
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "lcd.h"
+#include "cpu.h"
+#include "kernel.h"
+#include "thread.h"
+#include "power.h"
+#include "debug.h"
+#include "system.h"
+#include "sprintf.h"
+#include "button.h"
+#include "string.h"
+#include "file.h"
+#include "buffer.h"
+#include "audio.h"
+
+#if CONFIG_CPU == PP5020
+#include "i2c-pp5020.h"
+#elif CONFIG_CPU == PP5002
+#include "i2c-pp5002.h"
+#endif
+
+/*
+ * Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
+ */
+void i2s_reset(void)
+{
+#if CONFIG_CPU == PP5020
+    /* I2S soft reset */
+    outl(inl(0x70002800) | 0x80000000, 0x70002800);
+    outl(inl(0x70002800) & ~0x80000000, 0x70002800);
+
+    /* BIT.FORMAT [11:10] = I2S (default) */
+    outl(inl(0x70002800) & ~0xc00, 0x70002800);
+    /* BIT.SIZE [9:8] = 16bit (default) */
+    outl(inl(0x70002800) & ~0x300, 0x70002800);
+
+    /* FIFO.FORMAT [6:4] = 32 bit LSB */
+    /* since BIT.SIZ < FIFO.FORMAT low 16 bits will be 0 */
+    outl(inl(0x70002800) | 0x30, 0x70002800);
+
+    /* RX_ATN_LVL=1 == when 12 slots full */
+    /* TX_ATN_LVL=1 == when 12 slots empty */
+    outl(inl(0x7000280c) | 0x33, 0x7000280c);
+
+    /* Rx.CLR = 1, TX.CLR = 1 */
+    outl(inl(0x7000280c) | 0x1100, 0x7000280c);
+#elif CONFIG_CPU == PP5002
+    /* I2S device reset */
+    outl(inl(0xcf005030) | 0x80, 0xcf005030);
+    outl(inl(0xcf005030) & ~0x80, 0xcf005030);
+
+    /* I2S controller enable */
+    outl(inl(0xc0002500) | 0x1, 0xc0002500);
+
+    /* BIT.FORMAT [11:10] = I2S (default) */
+    /* BIT.SIZE [9:8] = 24bit */
+    /* FIFO.FORMAT = 24 bit LSB */
+
+    /* reset DAC and ADC fifo */
+    outl(inl(0xc000251c) | 0x30000, 0xc000251c);
+#endif
+}
+
+/*
+ * Initialise the WM8975 for playback via headphone and line out.
+ * Note, I'm using the WM8750 datasheet as its apparently close.
+ */
+int wmcodec_init(void) {
+    /* reset I2C */
+    i2c_init();
+
+#if CONFIG_CPU == PP5020
+    /* normal outputs for CDI and I2S pin groups */
+    outl(inl(0x70000020) & ~0x300, 0x70000020);
+
+    /*mini2?*/
+    outl(inl(0x70000010) & ~0x3000000, 0x70000010);
+    /*mini2?*/
+
+    /* device reset */
+    outl(inl(0x60006004) | 0x800, 0x60006004);
+    outl(inl(0x60006004) & ~0x800, 0x60006004);
+
+    /* device enable */
+    outl(inl(0x6000600C) | 0x807, 0x6000600C);
+
+    /* enable external dev clock clocks */
+    outl(inl(0x6000600c) | 0x2, 0x6000600c);
+
+    /* external dev clock to 24MHz */
+    outl(inl(0x70000018) & ~0xc, 0x70000018);
+#else
+    /* device reset */
+    outl(inl(0xcf005030) | 0x80, 0xcf005030);
+    outl(inl(0xcf005030) & ~0x80, 0xcf005030);
+
+    /* device enable */
+    outl(inl(0xcf005000) | 0x80, 0xcf005000);
+
+    /* GPIO D06 enable for output */
+    outl(inl(0xcf00000c) | 0x40, 0xcf00000c);
+    outl(inl(0xcf00001c) & ~0x40, 0xcf00001c);
+    /* bits 11,10 == 01 */
+    outl(inl(0xcf004040) | 0x400, 0xcf004040);
+    outl(inl(0xcf004040) & ~0x800, 0xcf004040);
+
+    outl(inl(0xcf004048) & ~0x1, 0xcf004048);
+
+    outl(inl(0xcf000004) & ~0xf, 0xcf000004);
+    outl(inl(0xcf004044) & ~0xf, 0xcf004044);
+
+    /* C03 = 0 */
+    outl(inl(0xcf000008) | 0x8, 0xcf000008);
+    outl(inl(0xcf000018) | 0x8, 0xcf000018);
+    outl(inl(0xcf000028) & ~0x8, 0xcf000028);
+#endif
+    
+    return 0;
+}
+
+void wmcodec_write(int reg, int data)
+{
+/* Todo: Since the ipod_i2c_* functions also work on H10 and possibly other PP
+   targets, these functions should probably be renamed */
+#if defined(IRIVER_H10) || defined(IRIVER_H10_5GB)
+    /* The H10's audio codec uses an I2C address of 0x1b */
+    ipod_i2c_send(0x1b, (reg<<1) | ((data&0x100)>>8),data&0xff);
+#else
+    /* The iPod's audio codecs use an I2C address of 0x1a */ 
+    ipod_i2c_send(0x1a, (reg<<1) | ((data&0x100)>>8),data&0xff);
+#endif
+}