More iPod 3G code from Seven Le Mesle

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

7 files changed, 610 insertions, 16 deletions

diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c
index 3c79c1be8f..a5fb78d6bd 100644
--- a/firmware/drivers/ata.c
+++ b/firmware/drivers/ata.c
@@ -71,13 +71,20 @@
 #define SET_REG(reg,val) reg = ((val) << 8)
 #define SET_16BITREG(reg,val) reg = (val)
 
-#elif CONFIG_CPU == PP5020
+#elif (CONFIG_CPU == PP5002) || (CONFIG_CPU == PP5020)
 
 /* don't use sh7034 assembler routines */
 #define PREFER_C_READING
 #define PREFER_C_WRITING
 
+#if (CONFIG_CPU == PP5002)
+#define ATA_IOBASE      0xc00031e0
+#define ATA_CONTROL     (*((volatile unsigned char*)(0xc00033f8)))
+#elif (CONFIG_CPU == PP5020)
 #define ATA_IOBASE      0xc30001e0
+#define ATA_CONTROL     (*((volatile unsigned char*)(0xc30003f8)))
+#endif
+
 #define ATA_DATA        (*((volatile unsigned short*)(ATA_IOBASE)))
 #define ATA_ERROR       (*((volatile unsigned char*)(ATA_IOBASE + 0x04)))
 #define ATA_NSECTOR     (*((volatile unsigned char*)(ATA_IOBASE + 0x08)))
@@ -86,7 +93,6 @@
 #define ATA_HCYL        (*((volatile unsigned char*)(ATA_IOBASE + 0x14)))
 #define ATA_SELECT      (*((volatile unsigned char*)(ATA_IOBASE + 0x18)))
 #define ATA_COMMAND     (*((volatile unsigned char*)(ATA_IOBASE + 0x1c)))
-#define ATA_CONTROL     (*((volatile unsigned char*)(0xc30003f8)))
 
 #define STATUS_BSY      0x80
 #define STATUS_RDY      0x40
@@ -928,6 +934,11 @@ extern void ata_flush(void)
 
 static int check_registers(void)
 {
+#if (CONFIG_CPU == PP5002)
+    /* This fails on the PP5002, but the ATA driver still works.  This
+       needs more investigation. */
+    return 0;
+#else
     int i;
     if ( ATA_STATUS & STATUS_BSY )
             return -1;
@@ -939,13 +950,14 @@ static int check_registers(void)
       SET_REG(ATA_HCYL,    WRITE_PATTERN4);
       
       if ((ATA_NSECTOR == READ_PATTERN1) &&
-          (ATA_SECTOR  == READ_PATTERN2) &&
-          (ATA_LCYL    == READ_PATTERN3) &&
-          (ATA_HCYL    == READ_PATTERN4))
+          (ATA_SECTOR  == READ_PATTERN2) &&
+          (ATA_LCYL    == READ_PATTERN3) &&
+          (ATA_HCYL    == READ_PATTERN4))
         return 0;
     }
 
     return -2;
+#endif
 }
 
 static int freeze_lock(void)
@@ -1254,7 +1266,7 @@ void ata_enable(bool on)
     (void)on;
 #elif CONFIG_CPU == TCC730
 
-#elif CONFIG_CPU == PP5020
+#elif (CONFIG_CPU == PP5002) || (CONFIG_CPU == PP5020)
     /* TODO: Implement ata_enable() */
     (void)on;
 #endif
@@ -1410,7 +1422,7 @@ int ata_init(void)
 #elif defined(IAUDIO_X5)
     /* X5 TODO */
     bool coldstart = true;
-#elif CONFIG_CPU == PP5020
+#elif (CONFIG_CPU == PP5002) || (CONFIG_CPU == PP5020)
     bool coldstart = false;
     /* TODO: Implement coldstart variable */
 #else
@@ -1440,6 +1452,13 @@ int ata_init(void)
     or_l(0x00080000, &GPIO_FUNCTION);
 
     /* FYI: The IDECONFIGx registers are set by set_cpu_frequency() */
+#elif CONFIG_CPU == PP5002
+    /* From ipod-ide.c:ipod_ide_register() */
+    outl(inl(0xc0003024) | (1 << 7), 0xc0003024);
+    outl(inl(0xc0003024) & ~(1<<2), 0xc0003024);
+
+    outl(0x10, 0xc0003000);
+    outl(0x80002150, 0xc0003004);
 #elif CONFIG_CPU == PP5020
     /* From ipod-ide.c:ipod_ide_register() */
     outl(inl(0xc3000028) | (1 << 5), 0xc3000028);
diff --git a/firmware/drivers/button.c b/firmware/drivers/button.c
index 654852c516..5098cbe556 100644
--- a/firmware/drivers/button.c
+++ b/firmware/drivers/button.c
@@ -61,7 +61,8 @@ static bool flipped;  /* buttons can be flipped to match the LCD flip */
 #define REPEAT_INTERVAL_FINISH  5
 
 /* the power-off button and number of repeated keys before shutting off */
-#if (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IRIVER_IFP7XX_PAD)
+#if (CONFIG_KEYPAD == IPOD_3G_PAD) || (CONFIG_KEYPAD == IPOD_4G_PAD) ||\
+    (CONFIG_KEYPAD == IRIVER_IFP7XX_PAD)
 #define POWEROFF_BUTTON BUTTON_PLAY
 #define POWEROFF_COUNT 40
 #else
@@ -220,7 +221,132 @@ void ipod_4g_button_int(void)
     CPU_HI_INT_EN = I2C_MASK;
 }
 #endif 
+#if CONFIG_KEYPAD == IPOD_3G_PAD
+/* Variable to use for setting button status in interrupt handler */
+int int_btn = BUTTON_NONE;
 
+/**
+ * 
+ * 
+ */
+void handle_scroll_wheel(int new_scroll, int was_hold, int reverse)
+{
+    int wheel_keycode = BUTTON_NONE;
+    static int prev_scroll = -1;
+    static int scroll_state[4][4] = {
+        {0, 1, -1, 0},
+        {-1, 0, 0, 1},
+        {1, 0, 0, -1},
+        {0, -1, 1, 0}
+    };
+
+    if ( prev_scroll == -1 ) {
+        prev_scroll = new_scroll;
+    }
+    else if (!was_hold) {
+        switch (scroll_state[prev_scroll][new_scroll]) {
+        case 1:
+            if (reverse) {
+                /* 'r' keypress */
+                wheel_keycode = BUTTON_SCROLL_FWD;
+            }
+            else {
+                /* 'l' keypress */
+                wheel_keycode = BUTTON_SCROLL_BACK;
+            }
+            break;
+        case -1:
+            if (reverse) {
+                /* 'l' keypress */
+                wheel_keycode = BUTTON_SCROLL_BACK;
+            }
+            else {
+                /* 'r' keypress */
+                wheel_keycode = BUTTON_SCROLL_FWD;
+            break;
+        default:
+            /* only happens if we get out of sync */
+            break;
+        }
+    }
+    }
+    if (wheel_keycode != BUTTON_NONE)
+              queue_post(&button_queue, wheel_keycode, NULL);
+    prev_scroll = new_scroll;
+}
+
+static int ipod_3g_button_read(void)
+{
+     unsigned char source, state;
+    static int was_hold = 0;
+int btn = BUTTON_NONE;
+    /*
+     * we need some delay for g3, cause hold generates several interrupts,
+     * some of them delayed
+     */
+        udelay(250);
+
+    /* get source of interupts */
+    source = inb(0xcf000040);
+    if (source) {
+        
+        /* get current keypad status */
+        state = inb(0xcf000030);
+        outb(~state, 0xcf000060);
+    
+            if (was_hold && source == 0x40 && state == 0xbf) {
+                /* ack any active interrupts */
+                outb(source, 0xcf000070);
+                return BUTTON_NONE;
+            }
+            was_hold = 0;
+    
+    
+        if ( source & 0x20 ) {
+                /* 3g hold switch is active low */
+                    btn |= BUTTON_HOLD;
+                    was_hold = 1;
+                /* hold switch on 3g causes all outputs to go low */
+                /* we shouldn't interpret these as key presses */
+                goto done;
+        }
+        if (source & 0x1) {
+             btn |= BUTTON_RIGHT;
+        }
+        if (source & 0x2) {
+            btn |= BUTTON_SELECT;
+        }
+        if (source & 0x4) {
+            btn |= BUTTON_PLAY;
+        }
+        if (source & 0x8) {
+            btn |= BUTTON_LEFT;
+        }
+        if (source & 0x10) {
+            btn |= BUTTON_MENU;
+        }
+    
+        if (source & 0xc0) {
+            handle_scroll_wheel((state & 0xc0) >> 6, was_hold, 0);
+        }
+    done:
+    
+        /* ack any active interrupts */
+        outb(source, 0xcf000070);
+    }
+    return btn;
+}
+
+void ipod_3g_button_int(void)
+{
+    /**
+     *  Theire is other things to do but for now ...
+     * TODO: implement this function in a better way 
+     **/
+   int_btn = ipod_3g_button_read();
+   
+}
+#endif 
 static void button_tick(void)
 {
     static int tick = 0;
@@ -404,8 +530,13 @@ void button_init(void)
     GPIOA_INT_EN = 0x20;
     CPU_INT_EN = 0x40000000;
     CPU_HI_INT_EN = I2C_MASK;
-#endif /* CONFIG_KEYPAD */
 
+#elif CONFIG_KEYPAD == IPOD_3G_PAD
+    outb(~inb(GPIOA_INPUT_VAL), GPIOA_INT_LEV);
+    outb(inb(GPIOA_INT_STAT), GPIOA_INT_CLR);
+    outb(0xff, GPIOA_INT_EN);
+
+#endif /* CONFIG_KEYPAD */
     queue_init(&button_queue);
     button_read();
     lastbtn = button_read();
@@ -418,7 +549,7 @@ void button_init(void)
 }
 
 #ifdef HAVE_LCD_BITMAP /* only bitmap displays can be flipped */
-#if (CONFIG_KEYPAD != IPOD_4G_PAD)
+#if (CONFIG_KEYPAD != IPOD_3G_PAD) && (CONFIG_KEYPAD != IPOD_4G_PAD)
 /*
  * helper function to swap UP/DOWN, LEFT/RIGHT (and F1/F3 for Recorder)
  */
@@ -883,7 +1014,7 @@ static int button_read(void)
     if (data & 0x01)
         btn |= BUTTON_ON;
 
-#elif CONFIG_KEYPAD == IPOD_4G_PAD
+#elif (CONFIG_KEYPAD == IPOD_3G_PAD) || (CONFIG_KEYPAD == IPOD_4G_PAD)
     (void)data;
     /* The int_btn variable is set in the button interrupt handler */
     btn = int_btn;
diff --git a/firmware/drivers/i2c-pp5002.c b/firmware/drivers/i2c-pp5002.c
new file mode 100644
index 0000000000..dc26d8a5d9
--- /dev/null
+++ b/firmware/drivers/i2c-pp5002.c
@@ -0,0 +1,168 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * PP5002 I2C driver
+ *
+ * Based on code from the ipodlinux project - http://ipodlinux.org/
+ * Adapted for Rockbox in January 2006
+ *
+ * Original file: linux/arch/armnommu/mach-ipod/hardware.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 "cpu.h"
+#include "kernel.h"
+#include "logf.h"
+#include "system.h"
+#include "i2c-pp5002.h"
+
+/* Local functions definitions */
+
+#define IPOD_I2C_BASE   0xc0008000
+#define IPOD_I2C_CTRL   (IPOD_I2C_BASE+0x00)
+#define IPOD_I2C_ADDR   (IPOD_I2C_BASE+0x04)
+#define IPOD_I2C_DATA0  (IPOD_I2C_BASE+0x0c)
+#define IPOD_I2C_DATA1  (IPOD_I2C_BASE+0x10)
+#define IPOD_I2C_DATA2  (IPOD_I2C_BASE+0x14)
+#define IPOD_I2C_DATA3  (IPOD_I2C_BASE+0x18)
+#define IPOD_I2C_STATUS (IPOD_I2C_BASE+0x1c)
+
+/* IPOD_I2C_CTRL bit definitions */
+#define IPOD_I2C_SEND   0x80
+
+/* IPOD_I2C_STATUS bit definitions */
+#define IPOD_I2C_BUSY   (1<<6)
+
+#define POLL_TIMEOUT (HZ)
+
+static int ipod_i2c_wait_not_busy(void)
+{
+    unsigned long timeout;
+    timeout = current_tick + POLL_TIMEOUT;
+    while (TIME_BEFORE(current_tick, timeout)) {
+         if (!(inb(IPOD_I2C_STATUS) & IPOD_I2C_BUSY)) {
+            return 0;
+         }
+         yield();
+    }
+
+    return -1;
+}
+
+
+/* Public functions */
+
+int ipod_i2c_read_byte(unsigned int addr, unsigned int *data)
+{
+    if (ipod_i2c_wait_not_busy() < 0)
+    {
+        return -1;
+    }
+
+    /* clear top 15 bits, left shift 1, or in 0x1 for a read */
+    outb(((addr << 17) >> 16) | 0x1, IPOD_I2C_ADDR);
+
+    outb(inb(IPOD_I2C_CTRL) | 0x20, IPOD_I2C_CTRL);
+
+    outb(inb(IPOD_I2C_CTRL) | IPOD_I2C_SEND, IPOD_I2C_CTRL);
+
+    if (ipod_i2c_wait_not_busy() < 0)
+    {
+        return -1;
+    }
+
+    if (data)
+    {
+        *data = inb(IPOD_I2C_DATA0);
+    }
+
+    return 0;
+}
+
+int ipod_i2c_send_bytes(unsigned int addr, unsigned int len, unsigned char *data)
+{
+    int data_addr;
+    unsigned int i;
+
+    if (len < 1 || len > 4)
+    {
+        return -1;
+    }
+
+    if (ipod_i2c_wait_not_busy() < 0)
+    {
+        return -2;
+    }
+
+    /* clear top 15 bits, left shift 1 */
+    outb((addr << 17) >> 16, IPOD_I2C_ADDR);
+
+    outb(inb(IPOD_I2C_CTRL) & ~0x20, IPOD_I2C_CTRL);
+
+    data_addr = IPOD_I2C_DATA0;
+    for ( i = 0; i < len; i++ )
+    {
+        outb(*data++, data_addr);
+        data_addr += 4;
+    }
+
+    outb((inb(IPOD_I2C_CTRL) & ~0x26) | ((len-1) << 1), IPOD_I2C_CTRL);
+
+    outb(inb(IPOD_I2C_CTRL) | IPOD_I2C_SEND, IPOD_I2C_CTRL);
+
+    return 0x0;
+}
+
+int ipod_i2c_send_byte(unsigned int addr, int data0)
+{
+    unsigned char data[1];
+
+    data[0] = data0;
+
+    return ipod_i2c_send_bytes(addr, 1, data);
+}
+
+
+int i2c_readbyte(unsigned int dev_addr, int addr)
+{
+    int data;
+
+    ipod_i2c_send_byte(dev_addr, addr);
+    ipod_i2c_read_byte(dev_addr, &data);
+
+    return data;
+}
+
+int ipod_i2c_send(unsigned int addr, int data0, int data1)
+{
+    unsigned char data[2];
+
+    data[0] = data0;
+    data[1] = data1;
+
+    return ipod_i2c_send_bytes(addr, 2, data);
+}
+
+void i2c_init(void)
+{
+   /* From ipodlinux */
+
+   outl(inl(0xcf005000) | 0x2, 0xcf005000);
+        
+   outl(inl(0xcf005030) | (1<<8), 0xcf005030);
+   outl(inl(0xcf005030) & ~(1<<8), 0xcf005030);
+}
diff --git a/firmware/drivers/pcf50605.c b/firmware/drivers/pcf50605.c
index d205f89882..122ba6ee38 100644
--- a/firmware/drivers/pcf50605.c
+++ b/firmware/drivers/pcf50605.c
@@ -24,7 +24,11 @@
  *
  ****************************************************************************/
 #include "config.h"
+#if CONFIG_I2C == I2C_PP5020
 #include "i2c-pp5020.h"
+#elif CONFIG_I2C == I2C_PP5002
+#include "i2c-pp5002.h"
+#endif
 #include "rtc.h"
 
 #define OOCS  0x01
diff --git a/firmware/drivers/power.c b/firmware/drivers/power.c
index e91d8a25cc..2150040dd6 100644
--- a/firmware/drivers/power.c
+++ b/firmware/drivers/power.c
@@ -84,7 +84,7 @@ void power_init(void)
     pcf50606_init();
 #endif
 #endif
-#elif CONFIG_CPU == PP5020
+#elif CONFIG_CPU == PP5020 || CONFIG_CPU == PP5002
     /* TODO: Implement power_init() */
 #else
 #ifdef HAVE_POWEROFF_ON_PB5
@@ -181,7 +181,7 @@ void ide_power_enable(bool on)
         or_l(0x80000000, &GPIO_OUT);
 #elif defined(IAUDIO_X5)
     /* X5 TODO */
-#elif CONFIG_CPU == PP5020
+#elif (CONFIG_CPU == PP5002) || (CONFIG_CPU == PP5020)
     /* We do nothing on the iPod */
 #elif defined(GMINI_ARCH)
     if(on)
@@ -237,7 +237,7 @@ bool ide_powered(void)
     return (GPIO_OUT & 0x80000000)?false:true;
 #elif defined(IAUDIO_X5)
     return false; /* X5 TODO */
-#elif CONFIG_CPU == PP5020
+#elif (CONFIG_CPU == PP5002) || (CONFIG_CPU == PP5020)
     /* pretend we are always powered - we don't turn it off on the ipod */
     return true;
 #elif defined(GMINI_ARCH)
@@ -273,7 +273,7 @@ void power_off(void)
     and_l(~0x00080000, &GPIO1_OUT);
 #elif defined(IAUDIO_X5)
     and_l(~0x00000008, &GPIO_OUT);
-#elif CONFIG_CPU == PP5020
+#elif (CONFIG_CPU == PP5002) || (CONFIG_CPU == PP5002)
 #ifndef BOOTLOADER
     /* We don't turn off the ipod, we put it in a deep sleep */
     pcf50605_standby_mode();
diff --git a/firmware/drivers/serial.c b/firmware/drivers/serial.c
index b491b13abb..8479da52f8 100644
--- a/firmware/drivers/serial.c
+++ b/firmware/drivers/serial.c
@@ -27,7 +27,11 @@
 #include "lcd.h"
 #include "serial.h"
 
-#if (CONFIG_CPU != MCF5249) && (CONFIG_CPU != TCC730) && (CONFIG_CPU != PP5020) && (CONFIG_CPU != PNX0101) && (CONFIG_CPU != MCF5250)
+
+#if (CONFIG_CPU != MCF5249) && (CONFIG_CPU != TCC730) && \
+        (CONFIG_CPU != PP5020) && (CONFIG_CPU != PNX0101) && \
+        (CONFIG_CPU != PP5002) && (CONFIG_CPU != MCF5250)
+
 /* FIX: this doesn't work on iRiver or Gmini or iPod yet */
 /* iFP7xx has no remote */
 
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;
+}