Add the Sansa M200 (v1) as a target - it's extremely similar to the Logik DAX (the LCD driver worked unchanged). Plus various tcc77x work, including a working tick interrupt (enabled in the bootloader). Rockbox itself builds for the M200 (there are no keymaps yet for the DAX), but doesn't progress very far due to the lack of an ATA (NAND flash) driver.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17306 a1c6a512-1295-4272-9138-f99709370657

20 files changed, 1171 insertions, 30 deletions

diff --git a/firmware/target/arm/tcc77x/app.lds b/firmware/target/arm/tcc77x/app.lds
new file mode 100644
index 0000000000..03a427f76b
--- /dev/null
+++ b/firmware/target/arm/tcc77x/app.lds
@@ -0,0 +1,144 @@
+#include "config.h"
+
+ENTRY(start)
+
+OUTPUT_FORMAT(elf32-littlearm)
+OUTPUT_ARCH(arm)
+STARTUP(target/arm/tcc77x/crt0.o)
+
+#define PLUGINSIZE PLUGIN_BUFFER_SIZE
+#define CODECSIZE CODEC_SIZE
+
+#include "imx31l.h"
+
+#define DRAMSIZE (MEMORYSIZE * 0x100000) - PLUGINSIZE - CODECSIZE
+
+#define DRAMORIG 0x20000000
+#define IRAMORIG 0x00000000
+#define IRAMSIZE IRAM_SIZE
+
+/* End of the audio buffer, where the codec buffer starts */
+#define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
+
+/* Where the codec buffer ends, and the plugin buffer starts */
+#define ENDADDR (ENDAUDIOADDR + CODECSIZE)
+
+MEMORY
+{
+    DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
+    IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
+}
+
+SECTIONS
+{
+    .text :
+    {
+        loadaddress = .;
+        _loadaddress = .;
+        . = ALIGN(0x200);
+        *(.init.text)
+        *(.text*)
+        *(.glue_7)
+        *(.glue_7t)
+        . = ALIGN(0x4);
+    } > DRAM
+
+    .rodata :
+    {
+        *(.rodata)  /* problems without this, dunno why */
+        *(.rodata*)
+        *(.rodata.str1.1)
+        *(.rodata.str1.4)
+        . = ALIGN(0x4);
+
+        /* Pseudo-allocate the copies of the data sections */
+        _datacopy = .;
+    } > DRAM
+
+    /* TRICK ALERT! For RAM execution, we put the .data section at the
+       same load address as the copy. Thus, we don't waste extra RAM
+       when we don't actually need the copy.  */
+    .data : AT ( _datacopy )
+    {
+        _datastart = .;
+        *(.data*)
+        . = ALIGN(0x4);
+        _dataend  = .;
+    } > DRAM
+
+    /DISCARD/ :
+    {
+        *(.eh_frame)
+    }
+
+    .vectors 0x0 :
+    {
+        _vectorsstart = .;
+        *(.vectors);
+        _vectorsend = .;
+    } AT> DRAM
+
+    _vectorscopy = LOADADDR(.vectors);
+
+    .iram :
+    {
+        _iramstart = .;
+        *(.icode)
+        *(.irodata)
+        *(.idata)
+        . = ALIGN(0x4);
+        _iramend = .;
+    } > DRAM
+
+    _iramcopy = LOADADDR(.iram);
+
+    .ibss (NOLOAD) :
+    {
+        _iedata = .;
+        *(.ibss)
+        . = ALIGN(0x4);
+        _iend = .;
+    } > DRAM
+
+    .stack :
+    {
+       *(.stack)
+       stackbegin = .;
+       . += 0x2000;
+       stackend = .;
+    } > DRAM
+
+    .bss :
+    {
+       _edata = .;
+        *(.bss*)
+        *(COMMON)
+        . = ALIGN(0x4);
+       _end = .;
+    } > DRAM
+
+    .audiobuf ALIGN(4) :
+    {
+        _audiobuffer = .;
+        audiobuffer = .;
+    } > DRAM
+
+    .audiobufend ENDAUDIOADDR:
+    {
+        audiobufend = .;
+        _audiobufend = .;
+    } > DRAM
+
+    .codec ENDAUDIOADDR:
+    {
+        codecbuf = .;
+        _codecbuf = .;
+    }
+
+    .plugin ENDADDR:
+    {
+        _pluginbuf = .;
+        pluginbuf = .;
+    }
+}
+
diff --git a/firmware/target/arm/tcc77x/ata-nand-tcc77x.c b/firmware/target/arm/tcc77x/ata-nand-tcc77x.c
index dd0ae7a950..d7ae5d5ed6 100644
--- a/firmware/target/arm/tcc77x/ata-nand-tcc77x.c
+++ b/firmware/target/arm/tcc77x/ata-nand-tcc77x.c
@@ -32,6 +32,9 @@ int ata_spinup_time = 0;
 
 long last_disk_activity = -1;
 
+/* Used to store (fake?) identify info */
+static unsigned short identify_info[256];
+
 /** static, private data **/ 
 static bool initialized = false;
 
@@ -91,4 +94,11 @@ void ata_enable(bool on)
 
 int ata_init(void)
 {
+     return 0;
+}
+
+/* TEMP: This will return junk, it's here for compilation only */
+unsigned short* ata_get_identify(void)
+{
+    return identify_info;
 }
diff --git a/firmware/target/arm/tcc77x/boot.lds b/firmware/target/arm/tcc77x/boot.lds
index 21fc7db96a..890c4ec785 100644
--- a/firmware/target/arm/tcc77x/boot.lds
+++ b/firmware/target/arm/tcc77x/boot.lds
@@ -10,16 +10,11 @@ STARTUP(target/arm/tcc77x/crt0.o)
 #define DRAMORIG 0x20000000
 #define IRAMORIG 0x00000000
 #define IRAMSIZE 64K
-#define FLASHORIG 0x0000000
-#define FLASHSIZE 1M
+
 
 MEMORY
 {
-#ifdef TCCBOOT
    DRAM : ORIGIN = DRAMORIG + DRAMSIZE - 0x100000, LENGTH = 0x100000
-#else
-   DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
-#endif
    IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
 }
 
@@ -52,6 +47,7 @@ SECTIONS
          _stackend = .;
          stackend = .;
     } > DRAM
+
     .bss : {
          _edata = .;
          *(.bss*);
diff --git a/firmware/target/arm/tcc77x/crt0.S b/firmware/target/arm/tcc77x/crt0.S
index e4ecb05a4e..246d02a1d7 100644
--- a/firmware/target/arm/tcc77x/crt0.S
+++ b/firmware/target/arm/tcc77x/crt0.S
@@ -29,6 +29,11 @@
 
     .section .init.text,"ax",%progbits
 
+    .extern irq
+    .extern fiq
+    .extern UIE
+    .extern main
+
     .global    start
 
 /* Telechips firmware files start with a 32-byte header, as part of the code. */
@@ -44,7 +49,8 @@ start:
     .word  0              /* Saved entrypoint of original firmware*/
     .word  0              /* Location in RAM of the start of our bootloader */
 #else
-    ldr    pc, =start_loc    /* jump to the main entry point  */
+//    ldr    pc, =start_loc    /* jump to the main entry point  */
+    b       start_loc
 
     .word  0xffff0601        /* Unknown magic */
     .word  0x3a726556        /* "Ver:" */
@@ -65,21 +71,40 @@ start:
 start_loc:
 
 #ifdef BOOTLOADER
+
+/*
+  If we are appended to the OF (i.e. dual-booting), do a simple GPIO
+  button check, and branch to the OF's entry point (saved by mktccboot)
+  if not active 
+*/
+
 #ifdef TCCBOOT
-#ifdef LOGIK_DAX
     mov    r0, #0x80000000
-    ldr    r0, [r0, #0x300]     /* Read GPIO A */
+#ifdef LOGIK_DAX
+    ldr    r0, [r0, #0x300]     /* Hold button is GPIO A, pin 0x2 */
     tst    r0, #0x2
-    ldrne  pc, [pc, #-28]     /* Jump to original firmware if HOLD button not pressed */
+#elif defined(SANSA_M200)
+    ldr    r0, [r0, #0x310]     /* Hold button is GPIO B, pin 0x200 */
+    tst    r0, #0x200
 #else
     #error No bootup key detection implemented for this target
 #endif
 
-    /* Copy bootloader to safe area - 0x21000000 (DRAM) */
-    /* TODO: Adjust this for other targets - DRAM + DRAMSIZE - 0x100000 */
-    ldr    r0, [pc, #-28]
-    mov    r1, #0x20000000
-    add    r1, r1, #0x100000
+    ldrne  pc, [pc, #-28]     /* Jump to OF if HOLD button not pressed */
+#endif /* TCCBOOT */
+
+/* We are now definitely executing the bootloader, so we relocate to the
+   linked address (see boot.lds) - 1MB from the end of DRAM.
+*/
+
+#ifdef TCCBOOT
+    ldr    r0, [pc, #-28]     /* mktccboot fills in the load address */
+#else
+    mov    r0, #0x20000000    /* Otherwise, load address is the start of DRAM */
+#endif
+    mov    r1, #0x20000000    /* Destination: 1MB from end of DRAM */
+    add    r1, r1, #((MEM - 1) * 0x100000)
+
     ldr    r2, =_dataend
 1:
     cmp    r2, r1
@@ -88,16 +113,14 @@ start_loc:
     bhi    1b
 
     ldr    pc, =copied_start   /* jump to the relocated start_loc:  */
-
 copied_start:
-#endif
-#else
-    /* We don't use interrupts in the bootloader */
+#endif /* BOOTLOADER */
 
     /* Set up stack for IRQ mode */ 
     mov    r0,#0xd2
     msr    cpsr, r0
     ldr    sp, =irq_stack
+
     /* Set up stack for FIQ mode */ 
     mov    r0,#0xd1
     msr    cpsr, r0
@@ -110,13 +133,22 @@ copied_start:
     mov    r0,#0xdb
     msr    cpsr, r0
     ldr    sp, =irq_stack
-#endif
 
     /* Switch to supervisor mode */
     mov    r0,#0xd3
     msr    cpsr, r0
     ldr    sp, =stackend
     
+    /* Copy exception handler code to address 0 */
+    mov    r2, #0x0
+    ldr    r3, =vectors_start
+    ldr    r4, =vectors_end
+1:
+    cmp    r4, r3
+    ldrhi  r5, [r3], #4
+    strhi  r5, [r2], #4
+    bhi    1b
+
     /* Initialise bss section to zero */
     ldr    r2, =_edata
     ldr    r3, =_end
@@ -139,9 +171,68 @@ copied_start:
     bl     main
     /* main() should never return */
 
-#ifndef BOOTLOADER
-    /* We don't use interrupts in the bootloader */
+/* Exception handlers. Will be copied to address 0 after memory remapping */
+vectors_start:
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+    ldr    pc, [pc, #24]
+
+    /* Exception vectors */
+    .global vectors
+vectors:
+    .word  start
+    .word  undef_instr_handler
+    .word  software_int_handler
+    .word  prefetch_abort_handler
+    .word  data_abort_handler
+    .word  reserved_handler
+    .word  irq_handler
+    .word  fiq_handler
+vectors_end:
+
+    .text
+
+/* All illegal exceptions call into UIE with exception address as first
+   parameter. This is calculated differently depending on which exception
+   we're in. Second parameter is exception number, used for a string lookup
+   in UIE.
+ */
+undef_instr_handler:
+    mov    r0, lr
+    mov    r1, #0
+    b      UIE
 
+/* We run supervisor mode most of the time, and should never see a software
+   exception being thrown. Perhaps make it illegal and call UIE?
+ */
+software_int_handler:
+reserved_handler:
+    movs   pc, lr
+
+prefetch_abort_handler:
+    sub    r0, lr, #4
+    mov    r1, #1
+    b      UIE
+
+data_abort_handler:
+    sub    r0, lr, #8
+    mov    r1, #2
+    b      UIE
+
+irq_handler:
+    stmfd  sp!, {r0-r3, r12, lr}
+    bl     irq
+    ldmfd  sp!, {r0-r3, r12, lr}
+    subs   pc, lr, #4
+
+/* Align stacks to cache line boundary */
+    .balign 16
+    
 /* 256 words of IRQ stack */
     .space 256*4
 irq_stack:
@@ -150,4 +241,3 @@ irq_stack:
     .space 256*4
 fiq_stack:
 
-#endif
diff --git a/firmware/target/arm/tcc77x/debug-target.h b/firmware/target/arm/tcc77x/debug-target.h
new file mode 100644
index 0000000000..07e8fc4322
--- /dev/null
+++ b/firmware/target/arm/tcc77x/debug-target.h
@@ -0,0 +1,22 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Karl Kurbjun
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+bool __dbg_hw_info(void);
+bool __dbg_ports(void);
+
diff --git a/firmware/target/arm/tcc77x/debug-tcc77x.c b/firmware/target/arm/tcc77x/debug-tcc77x.c
new file mode 100644
index 0000000000..dc3db3926f
--- /dev/null
+++ b/firmware/target/arm/tcc77x/debug-tcc77x.c
@@ -0,0 +1,81 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Rob Purchase
+ *
+ * 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 "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "string.h"
+#include <stdbool.h>
+#include "button.h"
+#include "lcd.h"
+#include "sprintf.h"
+#include "font.h"
+#include "debug-target.h"
+#include "adc.h"
+
+bool __dbg_ports(void)
+{
+    return false;
+}
+
+bool __dbg_hw_info(void)
+{
+    int line = 0, i, button, oldline;
+    bool done=false;
+    char buf[100];
+
+    lcd_setmargins(0, 0);
+    lcd_setfont(FONT_SYSFIXED);
+    lcd_clear_display();
+
+    /* Put all the static text before the while loop */
+    lcd_puts(0, line++, "[Hardware info]");
+
+    line++;
+    oldline=line;
+    while(!done)
+    {
+        line = oldline;
+        button = button_get(false);
+        
+        button &= ~BUTTON_REPEAT;
+        
+        if (button == BUTTON_SELECT)
+            done=true;
+
+        snprintf(buf, sizeof(buf), "current tick: %08x Seconds running: %08d",
+            (unsigned int)current_tick, (unsigned int)current_tick/100);  lcd_puts(0, line++, buf);
+            
+        snprintf(buf, sizeof(buf), "GPIOA: 0x%08x  GPIOB: 0x%08x",
+            (unsigned int)GPIOA, (unsigned int)GPIOB);  lcd_puts(0, line++, buf);
+        snprintf(buf, sizeof(buf), "GPIOC: 0x%08x  GPIOD: 0x%08x",
+            (unsigned int)GPIOC, (unsigned int)GPIOD);  lcd_puts(0, line++, buf);
+        snprintf(buf, sizeof(buf), "GPIOE: 0x%08x",
+            (unsigned int)GPIOE);  lcd_puts(0, line++, buf);
+
+        for (i = 0; i<4; i++)
+        {
+            snprintf(buf, sizeof(buf), "ADC%d: 0x%04x", i, adc_read(i));
+                lcd_puts(0, line++, buf);
+        }
+        
+        lcd_update();
+    }
+    return false;
+}
diff --git a/firmware/target/arm/tcc77x/i2c-target.h b/firmware/target/arm/tcc77x/i2c-target.h
new file mode 100644
index 0000000000..4600b8a576
--- /dev/null
+++ b/firmware/target/arm/tcc77x/i2c-target.h
@@ -0,0 +1,37 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Rob Purchase
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef I2C_TARGET_H
+#define I2C_TARGET_H
+
+/* Definitions for the TCC77X I2C bus */
+
+#define SDA_BIT (1<<10)
+#define SCL_BIT (1<<11)
+
+#define SCL    (GPIOB & SCL_BIT)
+#define SCL_HI GPIOB |= SCL_BIT
+#define SCL_LO GPIOB &= ~SCL_BIT
+
+#define SDA        (GPIOB & SDA_BIT)
+#define SDA_HI     GPIOB |= SDA_BIT
+#define SDA_LO     GPIOB &= ~SDA_BIT
+#define SDA_INPUT  GPIOB_DIR &= ~SDA_BIT
+#define SDA_OUTPUT GPIOB_DIR |= SDA_BIT
+
+#endif /* I2C_TARGET_H */
diff --git a/firmware/target/arm/tcc77x/kernel-tcc77x.c b/firmware/target/arm/tcc77x/kernel-tcc77x.c
new file mode 100644
index 0000000000..17c6ff0734
--- /dev/null
+++ b/firmware/target/arm/tcc77x/kernel-tcc77x.c
@@ -0,0 +1,45 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Copyright (C) 2008 by Rob Purchase
+*
+* 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 "config.h"
+#include "system.h"
+#include "kernel.h"
+#include "timer.h"
+#include "thread.h"
+
+void tick_start(unsigned int interval_in_ms)
+{
+    /* configure Timer T-Clock to 2Mhz (clock source 4 (Xin) divided by 6) */
+    PCLKCFG4 = (1 << 31) | (4 << 28) | (5 << 16);
+
+    /* disable Timer0 */
+    TCFG0 &= ~1;
+
+    /* set counter reference value based on 1Mhz tick */
+    TREF0 = interval_in_ms * 1000;
+
+    /* Timer0 = reset to 0, divide=2, IRQ enable, enable (continuous) */
+    TCFG0 = (1<<8) | (0<<4) | (1<<3) | 1;
+
+    /* Unmask timer IRQ */
+    IEN |= TIMER0_IRQ_MASK;
+}
+
+/* NB: Since we are using a single timer IRQ, tick tasks are dispatched as
+       part of the central timer IRQ processing in timer-tcc77x.c */
diff --git a/firmware/target/arm/tcc77x/lcd-ssd1815.c b/firmware/target/arm/tcc77x/lcd-ssd1815.c
index 4101f6ab7d..feb8bf1765 100644
--- a/firmware/target/arm/tcc77x/lcd-ssd1815.c
+++ b/firmware/target/arm/tcc77x/lcd-ssd1815.c
@@ -208,7 +208,7 @@ void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
 
 /* Performance function that works with an external buffer
    note that by and bheight are in 8-pixel units! */
-void lcd_blit_grey_phase_blit(unsigned char *values, unsigned char *phases,
+void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
                          int x, int by, int width, int bheight, int stride)
 {
     (void)values;
diff --git a/firmware/target/arm/tcc77x/m200/adc-target.h b/firmware/target/arm/tcc77x/m200/adc-target.h
new file mode 100644
index 0000000000..96fb1e44aa
--- /dev/null
+++ b/firmware/target/arm/tcc77x/m200/adc-target.h
@@ -0,0 +1,26 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 Dave Chapman
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef _ADC_TARGET_H_
+#define _ADC_TARGET_H_
+
+#define NUM_ADC_CHANNELS 8
+
+#define ADC_BUTTONS         1
+
+#endif /* _ADC_TARGET_H_ */
diff --git a/firmware/target/arm/tcc77x/m200/backlight-target.h b/firmware/target/arm/tcc77x/m200/backlight-target.h
new file mode 100644
index 0000000000..a54aa4686d
--- /dev/null
+++ b/firmware/target/arm/tcc77x/m200/backlight-target.h
@@ -0,0 +1,42 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Dave Chapman
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef BACKLIGHT_TARGET_H
+#define BACKLIGHT_TARGET_H
+
+#include "tcc77x.h"
+
+static inline bool _backlight_init(void)
+{
+    GPIOA_DIR |= 0x40;
+    return true;
+}
+
+static inline void _backlight_on(void)
+{
+    /* Enable backlight */
+    GPIOA |= 0x40;
+}
+
+static inline void _backlight_off(void)
+{
+    /* Disable backlight */
+    GPIOA &= ~0x40;
+}
+
+#endif
diff --git a/firmware/target/arm/tcc77x/m200/button-m200.c b/firmware/target/arm/tcc77x/m200/button-m200.c
new file mode 100644
index 0000000000..fec745ae99
--- /dev/null
+++ b/firmware/target/arm/tcc77x/m200/button-m200.c
@@ -0,0 +1,97 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Dave Chapman
+ *
+ * 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 "config.h"
+#include "cpu.h"
+#include "button.h"
+#include "adc.h"
+
+/* 
+
+Results of button testing (viewing ADC values whilst pressing buttons):
+
+HOLD:  GPIOB & 0x0200 (0=hold active, 0x0200 = hold inactive)
+
+ADC[1]: (approx values)
+
+Idle        - 0x3ff
+MENU        - unknown
+
+REPEAT/AB   - 0x03?
+LEFT        - 0x07?-0x08?
+SELECT      - 0x0c?
+RIGHT       - 0x11?
+
+PLAY/PAUSE  - 0x17?-0x018?
+VOL UP      - 0x1e?-0x01f?
+VOL DOWN    - 0x26?
+
+*/
+
+void button_init_device(void)
+{
+    /* Nothing to do */
+}
+
+int button_read_device(void)
+{
+    int btn = BUTTON_NONE;
+    int adc;
+ 
+    /* TODO - determine how to detect BUTTON_MENU - it doesn't appear to 
+              be connected to a GPIO or to an ADC 
+     */
+
+    adc = adc_read(ADC_BUTTONS);
+
+    if (adc < 0x384) {
+        if (adc < 0x140) {
+            if (adc < 0x96) {
+                if (adc < 0x50) {
+                    btn |= BUTTON_REPEATAB;   /* 0x00..0x4f */
+                } else {
+                    btn |= BUTTON_LEFT;       /* 0x50..0x95 */
+                }
+            } else {
+                if (adc < 0xe0) {
+                    btn |= BUTTON_SELECT;     /* 0x96..0xdf */
+                } else {
+                    btn |= BUTTON_RIGHT;      /* 0xe0..0x13f */
+                }
+            }
+        } else {
+            if (adc < 0x208) {
+                if (adc < 0x1b0) {
+                    btn |= BUTTON_PLAYPAUSE;  /* 0x140..0x1af */
+                } else {
+                    btn |= BUTTON_VOLUP;      /* 0x1b0..0x207 */
+                }
+            } else {
+                btn |= BUTTON_VOLDOWN;        /* 0x209..0x383 */
+            }
+        }
+    }
+
+    return btn;
+}
+
+bool button_hold(void)
+{
+    return (GPIOB & 0x200)?false:true;
+}
diff --git a/firmware/target/arm/tcc77x/m200/button-target.h b/firmware/target/arm/tcc77x/m200/button-target.h
new file mode 100644
index 0000000000..da7c82e6b2
--- /dev/null
+++ b/firmware/target/arm/tcc77x/m200/button-target.h
@@ -0,0 +1,52 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Dave Chapman
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef _BUTTON_TARGET_H_
+#define _BUTTON_TARGET_H_
+
+#include <stdbool.h>
+#include "config.h"
+
+#define HAS_BUTTON_HOLD
+
+void button_init_device(void);
+int button_read_device(void);
+bool button_hold(void);
+
+/* Main unit's buttons */
+#define BUTTON_MENU         0x00000001
+#define BUTTON_VOLUP        0x00000002
+#define BUTTON_VOLDOWN      0x00000004
+#define BUTTON_PLAYPAUSE    0x00000008
+#define BUTTON_REPEATAB     0x00000010
+#define BUTTON_LEFT         0x00000020
+#define BUTTON_RIGHT        0x00000040
+#define BUTTON_SELECT       0x00000080
+
+#define BUTTON_MAIN (BUTTON_MENU|BUTTON_VOLUP|BUTTON_VOLDOWN\
+                    |BUTTON_PLAYPAUSE|BUTTON_REPEATAB|BUTTON_LEFT\
+                    |BUTTON_RIGHT|BUTTON_SELECT)
+
+#define BUTTON_REMOTE 0
+
+/* Software power-off */
+#define POWEROFF_BUTTON BUTTON_MENU
+#define POWEROFF_COUNT 40
+                
+#endif /* _BUTTON_TARGET_H_ */
diff --git a/firmware/target/arm/tcc77x/m200/power-m200.c b/firmware/target/arm/tcc77x/m200/power-m200.c
new file mode 100644
index 0000000000..df2ee10d6b
--- /dev/null
+++ b/firmware/target/arm/tcc77x/m200/power-m200.c
@@ -0,0 +1,66 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 Dave Chapman
+ *
+ * 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 "config.h"
+#include "cpu.h"
+#include <stdbool.h>
+#include "kernel.h"
+#include "system.h"
+#include "power.h"
+
+#ifndef SIMULATOR
+
+void power_init(void)
+{
+}
+
+void ide_power_enable(bool on)
+{
+}
+
+bool ide_powered(void)
+{
+    return true;
+}
+
+void power_off(void)
+{
+}
+
+#else /* SIMULATOR */
+
+bool charger_inserted(void)
+{
+    return false;
+}
+
+void charger_enable(bool on)
+{
+    (void)on;
+}
+
+void power_off(void)
+{
+}
+
+void ide_power_enable(bool on)
+{
+   (void)on;
+}
+
+#endif /* SIMULATOR */
diff --git a/firmware/target/arm/tcc77x/pcm-tcc77x.c b/firmware/target/arm/tcc77x/pcm-tcc77x.c
new file mode 100644
index 0000000000..953f550612
--- /dev/null
+++ b/firmware/target/arm/tcc77x/pcm-tcc77x.c
@@ -0,0 +1,75 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by [whoever fills in these functions]
+ *
+ * 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 "system.h"
+#include "kernel.h"
+#include "logf.h"
+#include "audio.h"
+#include "sound.h"
+#include "file.h"
+
+void pcm_postinit(void)
+{
+}
+
+const void * pcm_play_dma_get_peak_buffer(int *count)
+{
+    (void)count;
+    return 0;
+}
+
+void pcm_play_dma_init(void)
+{
+}
+
+void pcm_apply_settings(void)
+{
+}
+
+void pcm_set_frequency(unsigned int frequency)
+{
+    (void)frequency;
+}
+
+void pcm_play_dma_start(const void *addr, size_t size)
+{
+    (void)addr;
+    (void)size;
+}
+
+void pcm_play_dma_stop(void)
+{
+}
+
+void pcm_play_lock(void)
+{
+}
+
+void pcm_play_unlock(void)
+{
+}
+
+void pcm_play_dma_pause(bool pause)
+{
+    (void)pause;
+}
+
+size_t pcm_get_bytes_waiting(void)
+{
+    return 0;
+}
diff --git a/firmware/target/arm/tcc77x/powermgmt-tcc77x.c b/firmware/target/arm/tcc77x/powermgmt-tcc77x.c
new file mode 100644
index 0000000000..20172c00ce
--- /dev/null
+++ b/firmware/target/arm/tcc77x/powermgmt-tcc77x.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Karl Kurbjun
+ *
+ * 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 "config.h"
+#include "adc.h"
+#include "powermgmt.h"
+#include "kernel.h"
+#include "pcf50606.h"
+
+unsigned short current_voltage = 3910;
+
+const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
+{
+    /* FIXME: calibrate value */
+    3380
+};
+
+const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
+{
+    /* FIXME: calibrate value */
+    3300
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
+const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
+{
+    /* FIXME: calibrate values. Table is "inherited" from iPod-PCF / H100 */
+    { 3370, 3650, 3700, 3740, 3780, 3820, 3870, 3930, 4000, 4080, 4160 }
+};
+
+#if CONFIG_CHARGING
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
+const unsigned short percent_to_volt_charge[11] =
+{
+    /* FIXME: calibrate values. Table is "inherited" from iPod-PCF / H100 */
+    3370, 3650, 3700, 3740, 3780, 3820, 3870, 3930, 4000, 4080, 4160
+};
+#endif /* CONFIG_CHARGING */
+
+#define BATTERY_SCALE_FACTOR 6000
+/* full-scale ADC readout (2^10) in millivolt */
+
+/* Returns battery voltage from ADC [millivolts] */
+unsigned int battery_adc_voltage(void)
+{
+    return current_voltage;
+}
+
diff --git a/firmware/target/arm/tcc77x/system-tcc77x.c b/firmware/target/arm/tcc77x/system-tcc77x.c
index baa1641c78..7323b0ce55 100644
--- a/firmware/target/arm/tcc77x/system-tcc77x.c
+++ b/firmware/target/arm/tcc77x/system-tcc77x.c
@@ -21,6 +21,28 @@
 #include "system.h"
 #include "panic.h"
 
+extern void TIMER(void);
+
+void irq(void)
+{
+    int irq = IREQ & 0x7fffffff;
+    CREQ = irq;     /* Clears the corresponding IRQ status */
+
+    if (irq & TIMER0_IRQ_MASK)
+    {
+        TIMER();
+    }
+    else
+    {
+        panicf("Unhandled IRQ 0x%08X", irq);
+    }
+}
+
+void fiq_handler(void)
+{
+    /* TODO */
+}
+
 void system_reboot(void)
 {
 }
@@ -49,7 +71,7 @@ static void gpio_init(void)
     GPIOB_DIR = 0x6ffff;
     GPIOB = 0;
     GPIOC_FUNC = 1;
-    GPIOC_DIR = 0x03ffffff;  /* mvn     r2, 0xfc000000 */
+    GPIOC_DIR = 0x03ffffff;  /* mvn r2, 0xfc000000 */
     GPIOC = 0;
 }
 #elif defined(IAUDIO_7)
@@ -72,6 +94,11 @@ static void gpio_init(void)
     GPIOD_DIR = 0x3e3;
     GPIOE_DIR = 0x88;
 }
+#elif defined(SANSA_M200)
+static void gpio_init(void)
+{
+    /* TODO - Implement for M200 */
+}
 #endif
 
 /* Second function called in the original firmware's startup code - we just
@@ -80,14 +107,16 @@ static void clock_init(void)
 {
     unsigned int i;
 
+    /* STP = 0x1, PW = 0x04 , HLD = 0x0 */
     CSCFG3 = (CSCFG3 &~ 0x3fff) | 0x820;
 
+    /* XIN=External main, Fcpu=Fsys, BCKDIV=1 (Fbus = Fsys / 2) */
     CLKCTRL = (CLKCTRL & ~0xff) | 0x14;
 
     if (BMI & 0x20)
-      PCLKCFG0 = 0xc82d7000;
+      PCLKCFG0 = 0xc82d7000; /* EN1 = 1, XIN=Ext. main, DIV1 = 0x2d, P1 = 1 */
     else
-      PCLKCFG0 = 0xc8ba7000;
+      PCLKCFG0 = 0xc8ba7000; /* EN1 = 1, XIN=Ext. main, DIV1 = 0xba, P1 = 1 */
 
     MCFG |= 0x2000;
 
@@ -96,14 +125,20 @@ static void clock_init(void)
     SDCFG = (SDCFG & ~0x7000) | 0x2000;
 #endif
 
+    /* Disable PLL */
     PLL0CFG |= 0x80000000;
 
+    /* Enable PLL, M=0xcf, P=0x13. m=M+8, p=P+2, S = 0
+       Fout = (215/21)*12MHz = 122857142Hz */
     PLL0CFG = 0x0000cf13;
 
     i = 8000;
     while (--i) {};
 
-    CLKDIV0 = 0x81000000;
+    /* Enable PLL0 */
+    CLKDIVC = 0x81000000;
+
+    /* Fsys = PLL0, Fcpu = Fsys, Fbus=Fsys / 2 */
     CLKCTRL = 0x80000010;
 
     asm volatile (
@@ -112,13 +147,118 @@ static void clock_init(void)
     );
 }
 
+static void cpu_init(void)
+{
+ /* Memory protection - see page 48 of ARM946 TRM
+http://infocenter.arm.com/help/topic/com.arm.doc.ddi0201d/DDI0201D_arm946es_r1p1_trm.pdf
+ */
+    asm volatile (
+        /* Region 0 - addr=0, size=4GB, enabled */
+        "mov     r0, #0x3f              \n\t"
+        "mcr     p15, 0, r0, c6, c0, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c0, 1  \n\t"
+
+#ifdef LOGIK_DAX
+        /* Address region 1 - addr 0x2fff0000, size=64KB, enabled*/
+        "ldr     r0, =0x2fff001f        \n\t"
+#elif defined(IAUDIO_7)
+        /* Address region 1 - addr 0x20000000, size=8KB, enabled*/
+        "mov     r0, #0x19              \n\t"
+        "add     r0, r0, #0x20000000    \n\t"
+#elif defined(SANSA_M200)
+        /* Address region 1 - addr 0x20000000, size=256MB, enabled*/
+        "mov     r0, #0x37              \n\t"
+        "add     r0, r0, #0x20000000    \n\t"
+#endif
+        "mcr     p15, 0, r0, c6, c1, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c1, 1  \n\t"
+
+        /* Address region 2 - addr 0x30000000, size=256MB, enabled*/
+        "mov     r0, #0x37              \n\t"
+        "add     r0, r0, #0x30000000    \n\t"
+        "mcr     p15, 0, r0, c6, c2, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c2, 1  \n\t"
+
+        /* Address region 2 - addr 0x40000000, size=512MB, enabled*/
+        "mov     r0, #0x39              \n\t"
+        "add     r0, r0, #0x40000000    \n\t"
+        "mcr     p15, 0, r0, c6, c3, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c3, 1  \n\t"
+
+        /* Address region 4 - addr 0x60000000, size=256MB, enabled*/
+        "mov     r0, #0x37              \n\t"
+        "add     r0, r0, #0x60000000    \n\t"
+        "mcr     p15, 0, r0, c6, c4, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c4, 1  \n\t"
+
+        /* Address region 5 - addr 0x10000000, size=256MB, enabled*/
+        "mov     r0, #0x37              \n\t"
+        "add     r0, r0, #0x10000000    \n\t"
+        "mcr     p15, 0, r0, c6, c5, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c5, 1  \n\t"
+
+        /* Address region 6 - addr 0x80000000, size=2GB, enabled*/
+        "mov     r0, #0x37              \n\t"
+        "add     r0, r0, #0x80000006    \n\t"
+        "mcr     p15, 0, r0, c6, c6, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c6, 1  \n\t"
+
+        /* Address region 7 - addr 0x3000f000, size=4KB, enabled*/
+        "ldr     r0, =0x3000f017        \n\t"
+        "mcr     p15, 0, r0, c6, c7, 0  \n\t"
+        "mcr     p15, 0, r0, c6, c7, 1  \n\t"
+
+
+        /* Register 5 - Access Permission Registers */
+
+        "ldr     r0, =0xffff            \n\t"
+        "mcr     p15, 0, r0, c5, c0, 0  \n\t"  /* write data access permission bits */
+        "mcr     p15, 0, r0, c5, c0, 1  \n\t"  /* write instruction access permission bits */
+
+        "mov     r0, #0xa7              \n\t"
+        "mcr     p15, 0, r0, c3, c0, 0  \n\t"  /* set write buffer control register */
+
+#ifdef LOGIK_DAX
+        "mov     r0, #0xa5              \n\t"
+#elif defined(IAUDIO_7) || defined(SANSA_M200)
+        "mov     r0, #0xa7              \n\t"
+#elif
+    #error NOT DEFINED FOR THIS TARGET!
+#endif
+        "mcr     p15, 0, r0, c2, c0, 0  \n\t"
+        "mcr     p15, 0, r0, c2, c0, 1  \n\t"
+
+        "mov     r0, #0xa0000006        \n\t"
+        "mcr     p15, 0, r0, c9, c1, 0  \n\t"
+
+        "ldr     r1, =0x1107d           \n\t"
+        "mov     r0, #0x0               \n\t"
+        "mcr     p15, 0, r0, c7, c5, 0  \n\t" /* Flush instruction cache */
+        "mcr     p15, 0, r0, c7, c6, 0  \n\t" /* Flush data cache */
+
+        "mcr     p15, 0, r1, c1, c0, 0  \n\t" /* CPU control bits */
+        : : : "r0", "r1"
+    );
+}
+
+
 
 void system_init(void)
 {
-    /* TODO: cache init - the original firmwares have cache init code which
-       is called at the very start of the firmware */
+    /* mask all interrupts */
+    IEN = 0;
+
+    /* Set all interrupts as IRQ for now - some may need to be FIQ in future */
+    IRQSEL = 0xffffffff; 
+
+    /* Set master enable bit */
+    IEN = 0x80000000;
+
+    cpu_init();
     clock_init();
     gpio_init();
+
+    enable_irq();
 }
 
 int system_memory_guard(int newmode)
diff --git a/firmware/target/arm/tcc77x/timer-target.h b/firmware/target/arm/tcc77x/timer-target.h
new file mode 100644
index 0000000000..db25df7cd4
--- /dev/null
+++ b/firmware/target/arm/tcc77x/timer-target.h
@@ -0,0 +1,39 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Copyright (C) 2007 by Karl Kurbjun
+*
+* 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.
+*
+****************************************************************************/
+#ifndef TIMER_TARGET_H
+#define TIMER_TARGET_H
+
+/* timers are based on XIN (12Mhz) */
+#define TIMER_FREQ (12000000)
+
+bool __timer_set(long cycles, bool set);
+bool __timer_register(void);
+void __timer_unregister(void);
+
+#define __TIMER_SET(cycles, set) \
+    __timer_set(cycles, set)
+
+#define __TIMER_REGISTER(reg_prio, unregister_callback, cycles, \
+                              int_prio, timer_callback) \
+    __timer_register()
+
+#define __TIMER_UNREGISTER(...) \
+    __timer_unregister()
+
+#endif /* TIMER_TARGET_H */
diff --git a/firmware/target/arm/tcc77x/timer-tcc77x.c b/firmware/target/arm/tcc77x/timer-tcc77x.c
new file mode 100644
index 0000000000..32010b2d25
--- /dev/null
+++ b/firmware/target/arm/tcc77x/timer-tcc77x.c
@@ -0,0 +1,79 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Copyright (C) 2008 by Rob Purchase
+*
+* 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 "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "timer.h"
+#include "logf.h"
+
+/* Use the TC32 counter [sourced by Xin:12Mhz] for this timer, as it's the
+   only one that allows a 32-bit counter (Timer0-5 are 16/20 bit only). */
+
+bool __timer_set(long cycles, bool start)
+{
+    #warning function not implemented
+    
+    (void)cycles;
+    (void)start;
+    return false;
+}
+
+bool __timer_register(void)
+{
+    #warning function not implemented
+    
+    return false;
+}
+
+void __timer_unregister(void)
+{
+    #warning function not implemented
+}
+
+
+/* Timer interrupt processing - all timers (inc. tick) have a single IRQ */
+
+extern void (*tick_funcs[MAX_NUM_TICK_TASKS])(void);
+
+void TIMER(void)
+{
+    if (TIREQ & TF0)    /* Timer0 reached ref value */
+    {
+        int i;
+
+        /* Run through the list of tick tasks */
+        for(i = 0; i < MAX_NUM_TICK_TASKS; i++)
+        {
+            if(tick_funcs[i])
+            {
+                tick_funcs[i]();
+            }
+        }
+        current_tick++;
+        
+        /* reset Timer 0 IRQ & ref flags */
+        TIREQ |= TI0 | TF0;
+    }
+
+    if (TC32IRQ & (1<<3))    /* end of TC32 prescale */
+    {
+        /* dispatch timer */
+    }
+}
diff --git a/firmware/target/arm/tcc77x/usb-tcc77x.c b/firmware/target/arm/tcc77x/usb-tcc77x.c
new file mode 100644
index 0000000000..7254b919a7
--- /dev/null
+++ b/firmware/target/arm/tcc77x/usb-tcc77x.c
@@ -0,0 +1,36 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by [whoever fills in these functions]
+ *
+ * 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 "config.h"
+#include "usb.h"
+
+void usb_init_device(void)
+{
+}
+
+void usb_enable(bool on)
+{
+    (void)on;
+}
+
+/* Always return false for now */
+int usb_detect(void)
+{
+    return USB_EXTRACTED;
+}