More iPod 3G code from Seven Le Mesle

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8582 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 268 insertions, 0 deletions

diff --git a/firmware/drivers/wm8731l.c b/firmware/drivers/wm8731l.c
new file mode 100644
index 0000000000..d49e8f4476
--- /dev/null
+++ b/firmware/drivers/wm8731l.c
@@ -0,0 +1,268 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Driver for WM8731L audio codec
+ *
+ * Based on code from the ipodlinux project - http://ipodlinux.org/
+ * Adapted for Rockbox in January 2006
+ *
+ * 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"
+
+#include "i2c-pp5002.h"
+#include "wm8731l.h"
+#include "pcf50605.h"
+
+void wm8731l_reset(void);
+
+#define IPOD_PCM_LEVEL 0x65       /* -6dB */
+
+#define RESET     (0x0f<<1)
+#define PWRMGMT1  (0x19<<1)
+#define PWRMGMT2  (0x1a<<1)
+#define AINTFCE   (0x07<<1)
+#define LOUT1VOL  (0x02<<1)
+#define ROUT1VOL  (0x03<<1)
+#define LOUT2VOL  (0x28<<1)
+#define ROUT2VOL  (0x29<<1)
+
+int wm8731l_mute(int mute)
+{
+    if (mute)
+    {
+        /* Set DACMU = 1 to soft-mute the audio DACs. */
+        ipod_i2c_send(0x1a, 0xa, 0x8);
+    } else {
+        /* Set DACMU = 0 to soft-un-mute the audio DACs. */
+        ipod_i2c_send(0x1a, 0xa, 0x0);
+    }
+
+    return 0;
+}
+/** From ipodLinux **/
+static void codec_set_active(int active)
+{
+    /* set active to 0x0 or 0x1 */
+    if (active) {
+        ipod_i2c_send(0x1a, 0x12, 0x01);
+    } else {
+        ipod_i2c_send(0x1a, 0x12, 0x00);
+    }
+}
+
+/*
+ * Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
+ */
+static void i2s_reset(void)
+{
+    /* 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);
+}
+
+/*
+ * Initialise the WM8975 for playback via headphone and line out.
+ * Note, I'm using the WM8750 datasheet as its apparently close.
+ */
+int wm8731l_init(void) {
+    /* reset I2C */
+    i2c_init();
+
+    /* 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);
+    
+    return 0;
+}
+
+/* Silently enable / disable audio output */
+void wm8731l_enable_output(bool enable)
+{
+    if (enable) 
+    {
+        /* reset the I2S controller into known state */
+        i2s_reset();
+
+        ipod_i2c_send(0x1a, 0x1e, 0x0);        /*Reset*/
+
+        codec_set_active(0x0);
+
+        /* DACSEL=1 */
+        /* BYPASS=1 */
+        ipod_i2c_send(0x1a, 0x8, 0x18);
+    
+        /* set power register to POWEROFF=0 on OUTPD=0, DACPD=0 */
+        ipod_i2c_send(0x1a, 0xc, 0x67);
+
+        /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
+        /* IWL=00(16 bit) FORMAT=10(I2S format) */
+        ipod_i2c_send(0x1a, 0xe, 0x42);
+
+        wm8731l_set_sample_rate(WM8731L_44100HZ);
+
+        /* set the volume to -6dB */
+        ipod_i2c_send(0x1a, 0x4, IPOD_PCM_LEVEL);
+        ipod_i2c_send(0x1a, 0x6 | 0x1, IPOD_PCM_LEVEL);
+
+        /* ACTIVE=1 */
+        codec_set_active(1);
+
+        /* 5. Set DACMU = 0 to soft-un-mute the audio DACs. */
+        ipod_i2c_send(0x1a, 0xa, 0x0);
+
+        wm8731l_mute(0);
+    } else {
+        wm8731l_mute(1);
+    }
+}
+
+int wm8731l_set_master_vol(int vol_l, int vol_r)
+{
+    /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
+    /* 1111111 == +6dB */
+    /* 1111001 == 0dB */
+    /* 0110000 == -73dB */
+    /* 0101111 == mute (0x2f) */
+    if (vol_l == vol_r) {
+        ipod_i2c_send(0x1a, 0x4 | 0x1, vol_l);
+    } else {
+        ipod_i2c_send(0x1a, 0x4, vol_l);
+        ipod_i2c_send(0x1a, 0x6, vol_r);
+    }
+ 
+    return 0;
+}
+
+int wm8975_set_mixer_vol(int channel1, int channel2)
+{
+    (void)channel1;
+    (void)channel2;
+
+    return 0;
+}
+
+void wm8731l_set_bass(int value)
+{
+    (void)value;
+}
+
+void wm8731l_set_treble(int value)
+{
+    (void)value;
+}
+
+/* Nice shutdown of WM8975 codec */
+void wm8731l_close(void)
+{
+   /* set DACMU=1 DEEMPH=0 */
+    ipod_i2c_send(0x1a, 0xa, 0x8);
+
+    /* ACTIVE=0 */
+    codec_set_active(0x0);
+
+    /* line in mute left & right*/
+    ipod_i2c_send(0x1a, 0x0 | 0x1, 0x80);
+
+    /* set DACSEL=0, MUTEMIC=1 */
+    ipod_i2c_send(0x1a, 0x8, 0x2);
+
+    /* set POWEROFF=0 OUTPD=0 DACPD=1 */
+    ipod_i2c_send(0x1a, 0xc, 0x6f);
+
+    /* set POWEROFF=1 OUTPD=1 DACPD=1 */
+    ipod_i2c_send(0x1a, 0xc, 0xff);
+}
+
+/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
+void wm8731l_set_nsorder(int order)
+{
+    (void)order;
+}
+
+/*  */
+void wm8731l_set_sample_rate(int sampling_control)
+{
+    codec_set_active(0x0);
+    ipod_i2c_send(0x1a, 0x10, sampling_control);
+    codec_set_active(0x1);
+}
+
+void wm8731l_enable_recording(bool source_mic)
+{
+    (void)source_mic;
+}
+
+void wm8731l_disable_recording(void)
+{
+
+}
+
+void wm8731l_set_recvol(int left, int right, int type)
+{
+    (void)left;
+    (void)right;
+    (void)type;
+}
+
+void wm8731l_set_monitor(int enable)
+{
+    (void)enable;
+}