Add framework for z180 SCC driver

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5436 42af7a65-404d-4744-a932-0658087f49c3

7 files changed, 1402 insertions, 24 deletions

diff --git a/nuttx/arch/z80/src/z180/Kconfig b/nuttx/arch/z80/src/z180/Kconfig
index 3082e69cbb..d00fa643b4 100644
--- a/nuttx/arch/z80/src/z180/Kconfig
+++ b/nuttx/arch/z80/src/z180/Kconfig
@@ -142,12 +142,334 @@ menu "Z180 Peripheral Support"
 config Z180_UART0
 	bool "UART0"
 	default n
-	select ARCH_HAVE_UART0
+	---help---
+		Select to enable a serial port on UART0.  On the Z8x182, bits 0-4 of
+		port B will not be available if ASCI channel 0 is selected.
 
 config Z180_UART1
 	bool "UART1"
 	default n
-	select ARCH_HAVE_UART1
+	---help---
+		Select to enable a serial port on UART1.  On the Z8x182, bits 5-7 of
+		port B will not be available if ASCI channel 0 is selected.
+
+config Z180_SCC
+	bool "SCC"
+	default n
+	depends on ARCH_CHIP_Z8L181
+	---help---
+		Select to enable a serial port on the SCC
+
+config Z180_ESCCA
+	bool "ESCC Channel A"
+	default n
+	depends on ARCH_CHIP_Z8L182 && !Z180_PORTC
+	---help---
+		Select to enable a serial port on ESCC Channel A.  Not available
+		if port C is selected.
+
+config Z180_ESCCB
+	bool "ESCC Channel B"
+	default n
+	depends on ARCH_CHIP_Z8L182 && !Z180_MIMIC
+	---help---
+		Select to enable a serial port on ESCC Channel B
+
+config Z180_TMR1
+	bool "Timer 1"
+	default n
+	---help---
+		Select to enable a Timer 1 (Timer 0 is used by NuttX as the system timer)
+
+# config Z180_DMA0
+#	bool "DMA0"
+#	default n
+#	---help---
+#		Select to enable support for DMA0
+#
+# config Z180_DMA1
+#	bool "DMA1"
+#	default n
+#	---help---
+#		Select to enable support for DMA1
+
+config Z180_PORTA
+	bool "PORT A"
+	default n
+	depends on ARCH_CHIP_Z8L181 || ARCH_CHIP_Z8L182 || !Z180_CTC
+	---help---
+		Select to enable a Port A (called PIA1 on the Z8x181)
+
+config Z180_PORTB
+	bool "PORT B"
+	default n
+	depends on ARCH_CHIP_Z8L181 || ARCH_CHIP_Z8L182
+	---help---
+		Select to enable a Port B (called PIA2 on the Z8x181).  On the Z8x182,
+		Bits 5-7 will not be available if ASCI channel 1 is used; Bits 0-4 will
+		not be available if ASCI channel 0 is used.
+
+config Z180_PORTC
+	bool "PORT C"
+	default n
+	depends on ARCH_CHIP_Z8L182 && !Z180_ESCCA
+	---help---
+		Select to enable a Port C.  Not available if ESCC channel A is selected.
+
+config Z180_CTC
+	bool "CTC"
+	default n
+	depends on ARCH_CHIP_Z8L181
+	---help---
+		Select to enable the Counter/Timer (CTC)
+
+config Z180_MIMIC
+	bool "16550 MIMIC"
+	default n
+	depends on ARCH_CHIP_Z8L182 && !Z180_ESCCB
+	---help---
+		Select to enable the 16550 MIMIC
+
+endmenu
+
+choice
+	prompt "Serial console"
+	default NO_SERIAL_CONSOLE
+
+config Z180_UART0_SERIAL_CONSOLE
+	bool "UART0"
+	depends on Z180_UART0
+
+config Z180_UART1_SERIAL_CONSOLE
+	bool "UART1"
+	depends on Z180_UART1
+
+config Z180_SCC_SERIAL_CONSOLE
+	bool "SCC"
+	depends on Z180_SCC
+
+config Z180_ESCCA_SERIAL_CONSOLE
+	bool "ESCC Channel A"
+	depends on Z180_ESCCA
+
+config Z180_ESCCB_SERIAL_CONSOLE
+	bool "ESCC Channel B"
+	depends on Z180_ESCCB
+
+endchoice
+
+menu "UART0 Configuration"
+	depends on Z180_UART0
+
+config Z180_UART0_RXBUFSIZE
+	int "Receive Buffer Size"
+	default 64
+	help
+	  Characters are buffered as they are received. This specifies
+	  the size of the receive buffer.
+
+config Z180_UART0_TXBUFSIZE
+	int "Transmit Buffer Size"
+	default 64
+	help
+	  Characters are buffered before being sent.  This specifies
+	  the size of the transmit buffer.
+
+config Z180_UART0_BAUD
+	int "Baud Rate"
+	default 9600
+	help
+	  The configured BAUD of the SCC.
+
+config Z180_UART0_BITS
+	int "Character Size"
+	default 8
+	help
+	  The number of bits in one character.  Must be either 5, 6, 7, or 8.
+
+config Z180_UART0_PARITY
+	int "Parity Setting"
+	default 0
+	help
+	  0=no parity, 1=odd parity, 2=even parity
+
+config Z180_UART0_2STOP
+	int "use 2 stop bits"
+	default 0
+	help
+	  1=Two stop bits
+
+endmenu
+
+menu "UART1 Configuration"
+	depends on Z180_UART1
+
+config Z180_UART1_RXBUFSIZE
+	int "Receive Buffer Size"
+	default 64
+	help
+	  Characters are buffered as they are received. This specifies
+	  the size of the receive buffer.
+
+config Z180_UART1_TXBUFSIZE
+	int "Transmit Buffer Size"
+	default 64
+	help
+	  Characters are buffered before being sent.  This specifies
+	  the size of the transmit buffer.
+
+config Z180_UART1_BAUD
+	int "Baud Rate"
+	default 9600
+	help
+	  The configured BAUD of the SCC.
+
+config Z180_UART1_BITS
+	int "Character Size"
+	default 8
+	help
+	  The number of bits in one character.  Must be either 5, 6, 7, or 8.
+
+config Z180_UART1_PARITY
+	int "Parity Setting"
+	default 0
+	help
+	  0=no parity, 1=odd parity, 2=even parity
+
+config Z180_UART1_2STOP
+	int "use 2 stop bits"
+	default 0
+	help
+	  1=Two stop bits
+
+endmenu
+
+menu "SCC Configuration"
+	depends on Z180_SCC
+
+config Z180_SCC_RXBUFSIZE
+	int "Receive Buffer Size"
+	default 64
+	help
+	  Characters are buffered as they are received. This specifies
+	  the size of the receive buffer.
+
+config Z180_SCC_TXBUFSIZE
+	int "Transmit Buffer Size"
+	default 64
+	help
+	  Characters are buffered before being sent.  This specifies
+	  the size of the transmit buffer.
+
+config Z180_SCC_BAUD
+	int "Baud Rate"
+	default 9600
+	help
+	  The configured BAUD of the SCC.
+
+config Z180_SCC_BITS
+	int "Character Size"
+	default 8
+	help
+	  The number of bits in one character.  Must be either 5, 6, 7, or 8.
+
+config Z180_SCC_PARITY
+	int "Parity Setting"
+	default 0
+	help
+	  0=no parity, 1=odd parity, 2=even parity
+
+config Z180_SCC_2STOP
+	int "use 2 stop bits"
+	default 0
+	help
+	  1=Two stop bits
+
+endmenu
+
+menu "ESCC Channel A Configuration"
+	depends on Z180_ESCCA
+
+config Z180_ESCCA_RXBUFSIZE
+	int "Receive Buffer Size"
+	default 64
+	help
+	  Characters are buffered as they are received. This specifies
+	  the size of the receive buffer.
+
+config Z180_ESCCA_TXBUFSIZE
+	int "Transmit Buffer Size"
+	default 64
+	help
+	  Characters are buffered before being sent.  This specifies
+	  the size of the transmit buffer.
+
+config Z180_ESCCA_BAUD
+	int "Baud Rate"
+	default 9600
+	help
+	  The configured BAUD of the SCC.
+
+config Z180_ESCCA_BITS
+	int "Character Size"
+	default 8
+	help
+	  The number of bits in one character.  Must be either 5, 6, 7, or 8.
+
+config Z180_ESCCA_PARITY
+	int "Parity Setting"
+	default 0
+	help
+	  0=no parity, 1=odd parity, 2=even parity
+
+config Z180_ESCCA_2STOP
+	int "use 2 stop bits"
+	default 0
+	help
+	  1=Two stop bits
+
+endmenu
+
+menu "ESCC Channel B Configuration"
+	depends on Z180_ESCCB
+
+config Z180_ESCCB_RXBUFSIZE
+	int "Receive Buffer Size"
+	default 64
+	help
+	  Characters are buffered as they are received. This specifies
+	  the size of the receive buffer.
+
+config Z180_ESCCB_TXBUFSIZE
+	int "Transmit Buffer Size"
+	default 64
+	help
+	  Characters are buffered before being sent.  This specifies
+	  the size of the transmit buffer.
+
+config Z180_ESCCB_BAUD
+	int "Baud Rate"
+	default 9600
+	help
+	  The configured BAUD of the SCC.
+
+config Z180_ESCCB_BITS
+	int "Character Size"
+	default 8
+	help
+	  The number of bits in one character.  Must be either 5, 6, 7, or 8.
+
+config Z180_ESCCB_PARITY
+	int "Parity Setting"
+	default 0
+	help
+	  0=no parity, 1=odd parity, 2=even parity
+
+config Z180_ESCCB_2STOP
+	int "use 2 stop bits"
+	default 0
+	help
+	  1=Two stop bits
 
 endmenu
 endif
diff --git a/nuttx/arch/z80/src/z180/Make.defs b/nuttx/arch/z80/src/z180/Make.defs
index f196c45d78..a50c67f39a 100644
--- a/nuttx/arch/z80/src/z180/Make.defs
+++ b/nuttx/arch/z80/src/z180/Make.defs
@@ -41,14 +41,14 @@ HEAD_ASRC = z180_head.asm
 endif
 endif
 
-CMN_ASRCS = 
-CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_createstack.c 
+CMN_ASRCS  = 
+CMN_CSRCS  = up_allocateheap.c up_assert.c up_blocktask.c up_createstack.c 
 CMN_CSRCS += up_doirq.c up_exit.c up_idle.c up_initialize.c
 CMN_CSRCS += up_interruptcontext.c up_mdelay.c up_releasepending.c
 CMN_CSRCS += up_releasestack.c up_reprioritizertr.c up_unblocktask.c
 CMN_CSRCS += up_udelay.c up_usestack.c
 
-CHIP_ASRCS = z180_restoreusercontext.asm z180_saveusercontext.asm
+CHIP_ASRCS  = z180_restoreusercontext.asm z180_saveusercontext.asm
 CHIP_ASRCS += z180_vectcommon.asm
 
 ifeq ($(CONFIG_LINKER_ROM_AT_0000),y)
@@ -57,6 +57,6 @@ else
 CHIP_ASRCS += z180_vectors.asm
 endif
 
-CHIP_CSRCS = z180_copystate.c z180_initialstate.c z180_io.c z180_irq.c
-CHIP_CSRCS += z180_mmu.c z180_registerdump.c z180_schedulesigaction.c
-CHIP_CSRCS += z180_sigdeliver.c
+CHIP_CSRCS  = z180_copystate.c z180_initialstate.c z180_io.c z180_irq.c
+CHIP_CSRCS += z180_modifiyreg8.c z180_mmu.c z180_registerdump.c
+CHIP_CSRCS += z180_schedulesigaction.c z180_sigdeliver.c
diff --git a/nuttx/arch/z80/src/z180/z180_config.h b/nuttx/arch/z80/src/z180/z180_config.h
new file mode 100644
index 0000000000..9f5bb95894
--- /dev/null
+++ b/nuttx/arch/z80/src/z180/z180_config.h
@@ -0,0 +1,140 @@
+/************************************************************************************
+ * arch/z80/src/z180/z180_config.h
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_Z80_SRC_Z180_Z180_CONFIG_H
+#define __ARCH_Z80_SRC_Z180_Z180_CONFIG_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <arch/z180/chip.h>
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Verify that selected features match the capability of the selected CPU */
+
+#ifndef HAVE_Z8X181
+#  undef CONFIG_Z180_SCC
+#  undef CONFIG_Z180_CTC
+#endif
+
+#ifndef HAVE_Z8X182
+#  undef CONFIG_Z180_ESCCA
+#  undef CONFIG_Z180_ESCCB
+#  undef CONFIG_Z180_PORTC
+#  undef CONFIG_Z180_MIMIC
+#endif
+
+#if !defined(HAVE_Z8X181) && !defined(HAVE_Z8X182)
+#  undef CONFIG_Z180_PORTA
+#  undef CONFIG_Z180_PORTB
+#endif
+
+/* Are any UARTs enabled? */
+
+#undef HAVE_SERIAL
+#if defined(CONFIG_Z180_UART0) || defined(CONFIG_Z180_UART1) || \
+    defined(CONFIG_Z180_SCC) || defined(CONFIG_Z180_ESCCA) || \
+    defined(CONFIG_Z180_ESCCB)
+#  define HAVE_SERIAL 1
+#endif
+
+/* Make sure all features are disabled for disabled UARTs/[E]SCC channels.  This
+ * simplifies checking later.
+ */
+
+#ifndef CONFIG_Z180_UART0
+#  undef CONFIG_Z180_UART0_SERIAL_CONSOLE
+#endif
+
+#ifndef CONFIG_Z180_UART1
+#  undef CONFIG_Z180_UART1_SERIAL_CONSOLE
+#endif
+
+#ifndef CONFIG_Z180_SCC
+#  undef CONFIG_SCC_SERIAL_CONSOLE
+#endif
+
+#ifndef CONFIG_Z180_ESCCA
+#  undef CONFIG_Z180_ESCCA_SERIAL_CONSOLE
+#endif
+
+#ifndef CONFIG_Z180_ESCCA
+#  undef CONFIG_Z180_ESCCB_SERIAL_CONSOLE
+#endif
+
+/* Is there a serial console? There should be at most one defined. */
+
+#if defined(CONFIG_Z180_UART0_SERIAL_CONSOLE)
+#  undef CONFIG_Z180_UART1_SERIAL_CONSOLE
+#  undef CONFIG_Z180_SCC_SERIAL_CONSOLE
+#  undef CONFIG_Z180_ESCCA_SERIAL_CONSOLE
+#  undef CONFIG_Z180_ESCCB_SERIAL_CONSOLE
+#  define HAVE_SERIAL_CONSOLE 1
+#elif defined(CONFIG_Z180_UART1_SERIAL_CONSOLE)
+#  undef CONFIG_Z180_SCC_SERIAL_CONSOLE
+#  undef CONFIG_Z180_ESCCA_SERIAL_CONSOLE
+#  undef CONFIG_Z180_ESCCB_SERIAL_CONSOLE
+#  define HAVE_SERIAL_CONSOLE 1
+#elif defined(CONFIG_Z180_ESCC_SERIAL_CONSOLE)
+#  undef CONFIG_Z180_ESCCA_SERIAL_CONSOLE
+#  undef CONFIG_Z180_ESCCB_SERIAL_CONSOLE
+#  define HAVE_SERIAL_CONSOLE 1
+#elif defined(CONFIG_Z180_ESCCA_SERIAL_CONSOLE)
+#  undef CONFIG_Z180_ESCCB_SERIAL_CONSOLE
+#  define HAVE_SERIAL_CONSOLE 1
+#elif defined(CONFIG_Z180_ESCCB_SERIAL_CONSOLE)
+#  define HAVE_SERIAL_CONSOLE 1
+#else
+#  undef HAVE_SERIAL_CONSOLE
+#endif
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+#endif /* __ARCH_Z80_SRC_Z180_Z180_CONFIG_H */
diff --git a/nuttx/arch/z80/src/z180/z180_iomap.h b/nuttx/arch/z80/src/z180/z180_iomap.h
index 4a695f95d6..c429fe7d31 100644
--- a/nuttx/arch/z80/src/z180/z180_iomap.h
+++ b/nuttx/arch/z80/src/z180/z180_iomap.h
@@ -106,24 +106,26 @@
 
 /* DMA Registers */
 
-#define Z180_DMA_SAR0L       (SFR_OFFSET+0x20) /* DMA Source Address Register Ch 0L */
-#define Z180_DMA_SAR0H       (SFR_OFFSET+0x21) /* DMA Source Address Register Ch 0H */
-#define Z180_DMA_SAR0B       (SFR_OFFSET+0x22) /* DMA Source Address Register Ch 0B */
-#define Z180_DMA_DAR0L       (SFR_OFFSET+0x23) /* DMA Destination Address Register Ch 0L */
-#define Z180_DMA_DAR0H       (SFR_OFFSET+0x24) /* DMA Destination Address Register Ch 0H */
-#define Z180_DMA_DAR0B       (SFR_OFFSET+0x25) /* DMA Destination Address Register Ch 0B */
-#define Z180_DMA_BCR0L       (SFR_OFFSET+0x26) /* DMA Byte Count Register Ch 0L */
-#define Z180_DMA_BCR0H       (SFR_OFFSET+0x27) /* DMA Byte Count Register Ch 0H */
-#define Z180_DMA_MAR1L       (SFR_OFFSET+0x28) /* DMA Memory Address Register Ch 1L */
-#define Z180_DMA_MAR1H       (SFR_OFFSET+0x29) /* DMA Memory Address Register Ch 1H */
-#define Z180_DMA_MAR1B       (SFR_OFFSET+0x2a) /* DMA Memory Address Register Ch 1B */
-#define Z180_DMA_IAR1L       (SFR_OFFSET+0x2b) /* DMA I/0 Address Register Ch 1L */
-#define Z180_DMA_IAR1H       (SFR_OFFSET+0x2c) /* DMA I/0 Address Register Ch 1H */
+#define Z180_DMA0_SARL       (SFR_OFFSET+0x20) /* DMA Source Address Register Ch 0L */
+#define Z180_DMA0_SARH       (SFR_OFFSET+0x21) /* DMA Source Address Register Ch 0H */
+#define Z180_DMA0_SARB       (SFR_OFFSET+0x22) /* DMA Source Address Register Ch 0B */
+#define Z180_DMA0_DARL       (SFR_OFFSET+0x23) /* DMA Destination Address Register Ch 0L */
+#define Z180_DMA0_DARH       (SFR_OFFSET+0x24) /* DMA Destination Address Register Ch 0H */
+#define Z180_DMA0_DARB       (SFR_OFFSET+0x25) /* DMA Destination Address Register Ch 0B */
+#define Z180_DMA0_BCRL       (SFR_OFFSET+0x26) /* DMA Byte Count Register Ch 0L */
+#define Z180_DMA0_BCRH       (SFR_OFFSET+0x27) /* DMA Byte Count Register Ch 0H */
+
+#define Z180_DMA1_MARL       (SFR_OFFSET+0x28) /* DMA Memory Address Register Ch 1L */
+#define Z180_DMA1_MARH       (SFR_OFFSET+0x29) /* DMA Memory Address Register Ch 1H */
+#define Z180_DMA1_MARB       (SFR_OFFSET+0x2a) /* DMA Memory Address Register Ch 1B */
+#define Z180_DMA1_IARL       (SFR_OFFSET+0x2b) /* DMA I/0 Address Register Ch 1L */
+#define Z180_DMA1_IARH       (SFR_OFFSET+0x2c) /* DMA I/0 Address Register Ch 1H */
 #ifdef HAVE_Z8S180 /* Z8S180/Z8L180 class processors */
-#  define Z180_DMA_IAR1B     (SFR_OFFSET+0x2d) /* DMA I/O Address Register Ch 1B */
+#  define Z180_DMA1_IARB     (SFR_OFFSET+0x2d) /* DMA I/O Address Register Ch 1B */
 #endif
-#define Z180_DMA_BCR1L       (SFR_OFFSET+0x2e) /* DMA Byte Count Register Ch 1L */
-#define Z180_DMA_BCR1H       (SFR_OFFSET+0x2f) /* DMA Byte Count Register Ch 1H */
+#define Z180_DMA1_BCRL       (SFR_OFFSET+0x2e) /* DMA Byte Count Register Ch 1L */
+#define Z180_DMA1_BCRH       (SFR_OFFSET+0x2f) /* DMA Byte Count Register Ch 1H */
+
 #define Z180_DMA_DSTAT       (SFR_OFFSET+0x30) /* DMA Status Register */
 #define Z180_DMA_DMODE       (SFR_OFFSET+0x31) /* DMA Mode Register */
 #define Z180_DMA_DCNTL       (SFR_OFFSET+0x32) /* DMA/WAIT Control Register */
diff --git a/nuttx/arch/z80/src/z180/z180_lowscc.c b/nuttx/arch/z80/src/z180/z180_lowscc.c
new file mode 100644
index 0000000000..b44414d553
--- /dev/null
+++ b/nuttx/arch/z80/src/z180/z180_lowscc.c
@@ -0,0 +1,135 @@
+/****************************************************************************
+ * arch/z80/src/z180/z180_loweruart.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <string.h>
+
+#include <arch/io.h>
+#include <nuttx/arch.h>
+#include <nuttx/sched.h>
+
+#include "chip/chip.h"
+#include "common/up_internal.h"
+#include "z80_config.h"
+
+#ifdef USE_LOWUARTINIT
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+/* Select UART parameters for the selected console */
+
+#if defined(CONFIG_Z180_SCC_SERIAL_CONSOLE)
+#  define CONSOLE_CR           Z181_SCC_CR
+#  define CONSOLE_DR           Z181_SCC_DR
+#  define CONSOLE_BAUD         CONFIG_Z180_SCC_BAUD
+#  define CONSOLE_BITS         CONFIG_Z180_SCC_BITS
+#  define CONSOLE_2STOP        CONFIG_Z180_SCC_2STOP
+#  define CONSOLE_PARITY       CONFIG_Z180_SCC_PARITY
+
+#elif defined(CONFIG_Z180_ESCCB_SERIAL_CONSOLE)
+#  define CONSOLE_CR           Z182_ESCCA_CR
+#  define CONSOLE_DR           Z182_ESCCA_DR
+#  define CONSOLE_BAUD         CONFIG_Z180_ESCCA_BAUD
+#  define CONSOLE_BITS         CONFIG_Z180_ESCCA_BITS
+#  define CONSOLE_2STOP        CONFIG_Z180_ESCCA_2STOP
+#  define CONSOLE_PARITY       CONFIG_Z180_ESCCA_PARITY
+
+#elif defined(CONFIG_Z180_ESCCB_SERIAL_CONSOLE)
+#  define CONSOLE_CR           Z182_ESCCB_CR
+#  define CONSOLE_DR           Z182_ESCCB_DR
+#  define CONSOLE_BAUD         CONFIG_Z180_ESCCB_BAUD
+#  define CONSOLE_BITS         CONFIG_Z180_ESCCB_BITS
+#  define CONSOLE_PARITY       CONFIG_Z180_ESCCB_PARITY
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+#if defined(HAVE_SERIAL_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
+static void z180_setbaud(void)
+{
+#warning "Missing logic"
+}
+#endif /* HAVE_SERIAL_CONSOLE && !CONFIG_SUPPRESS_UART_CONFIG */
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_lowuartinit
+ ****************************************************************************/
+
+void up_lowuartinit(void)
+{
+#ifdef HAVE_SERIAL
+#warning "Missing logic"
+
+  /* Configure for usage of {E]SCC channels (whether or not we have a console) */
+
+#ifdef CONFIG_Z180_SCC
+#warning "Missing logic"
+#endif
+
+#ifdef CONFIG_Z180_ESCCA
+#warning "Missing logic"
+#endif
+
+#ifdef CONFIG_Z180_ESCCB
+#warning "Missing logic"
+#endif
+
+  /* Configure the console for immediate usage */
+
+#if defined(HAVE_SERIAL_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
+#warning "Missing logic"
+#endif /* HAVE_SERIAL_CONSOLE && !CONFIG_SUPPRESS_UART_CONFIG */
+#endif /* HAVE_SERIAL */
+}
+
+#endif /* USE_LOWUARTINIT */
diff --git a/nuttx/arch/z80/src/z180/z180_modifiyreg8.c b/nuttx/arch/z80/src/z180/z180_modifiyreg8.c
new file mode 100644
index 0000000000..f5494a6b44
--- /dev/null
+++ b/nuttx/arch/z80/src/z180/z180_modifiyreg8.c
@@ -0,0 +1,82 @@
+/****************************************************************************
+ * arch/arm/src/common/up_modifyreg8.c
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <arch/irq.h>
+#include <arch/io.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: modifyreg8
+ *
+ * Description:
+ *   Atomically modify the specified bits in a I/O register
+ *
+ ****************************************************************************/
+
+void modifyreg8(uint16_t addr, uint8_t clearbits, uint8_t setbits)
+{
+  irqstate_t flags;
+  uint8_t    regval;
+
+  flags   = irqsave();
+  regval  = inp(addr);
+  regval &= ~clearbits;
+  regval |= setbits;
+  outp(regval, addr);
+  irqrestore(flags);
+}
diff --git a/nuttx/arch/z80/src/z180/z180_scc.c b/nuttx/arch/z80/src/z180/z180_scc.c
new file mode 100644
index 0000000000..b15183bda3
--- /dev/null
+++ b/nuttx/arch/z80/src/z180/z180_scc.c
@@ -0,0 +1,697 @@
+/****************************************************************************
+ * arch/z80/src/ez08/z180_scc.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <semaphore.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/arch.h>
+#include <nuttx/serial/serial.h>
+#include <arch/serial.h>
+#include <arch/io.h>
+
+#include "chip/chip.h"
+#include "os_internal.h"
+#include "up_internal.h"
+
+#ifdef USE_SERIALDRIVER
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct z180_dev_s
+{
+  uint32_t     baud;        /* Configured baud */
+  uint8_t      cr;          /* [E]SCC control register */
+  uint8_t      dr;          /* [E]SCC data register */
+  uint8_t      irq;         /* IRQ associated with this [E]SCC */
+  uint8_t      parity;      /* 0=none, 1=odd, 2=even */
+  uint8_t      bits;        /* Number of bits (7 or 8) */
+  bool         stopbits2;   /* true: Configure with 2 (vs 1) */
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static int  z180_setup(struct uart_dev_s *dev);
+static void z180_shutdown(struct uart_dev_s *dev);
+static int  z180_attach(struct uart_dev_s *dev);
+static void z180_detach(struct uart_dev_s *dev);
+static int  z180_interrrupt(int irq, void *context);
+static int  z180_ioctl(struct file *filep, int cmd, unsigned long arg);
+static int  z180_receive(struct uart_dev_s *dev, unsigned int *status);
+static void z180_rxint(struct uart_dev_s *dev, bool enable);
+static bool z180_rxavailable(struct uart_dev_s *dev);
+static void z180_send(struct uart_dev_s *dev, int ch);
+static void z180_txint(struct uart_dev_s *dev, bool enable);
+static bool z180_txready(struct uart_dev_s *dev);
+static bool z180_txempty(struct uart_dev_s *dev);
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+struct uart_ops_s g_uart_ops =
+{
+  z180_setup,          /* setup */
+  z180_shutdown,       /* shutdown */
+  z180_attach,         /* attach */
+  z180_detach,         /* detach */
+  z180_ioctl,          /* ioctl */
+  z180_receive,        /* receive */
+  z180_rxint,          /* rxint */
+  z180_rxavailable,    /* rxavailable */
+  z180_send,           /* send */
+  z180_txint,          /* txint */
+  z180_txready,        /* txready */
+  z180_txempty         /* txempty */
+};
+
+/* I/O buffers */
+
+#ifdef CONFIG_Z180_SCC
+static char g_scc_rxbuffer[CONFIG_Z180_SCC_RXBUFSIZE];
+static char g_scc_txbuffer[CONFIG_Z180_SCC_TXBUFSIZE];
+#endif
+#ifdef CONFIG_Z180_ESCCA
+static char g_escca_rxbuffer[CONFIG_Z180_ESCCA_RXBUFSIZE];
+static char g_escca_txbuffer[CONFIG_Z180_ESCCA_TXBUFSIZE];
+#endif
+#ifdef CONFIG_Z180_ESCCB
+static char g_esccb_rxbuffer[CONFIG_Z180_ESCCB_RXBUFSIZE];
+static char g_esccb_txbuffer[CONFIG_Z180_ESCCB_TXBUFSIZE];
+#endif
+
+/* This describes the state of the SCC port. */
+
+#ifdef CONFIG_Z180_SCC
+static const struct z180_dev_s g_scc_priv =
+{
+  CONFIG_Z180_SCC_BAUD,        /* baud */
+  Z181_SCC_CR,                 /* cr */
+  Z181_SCC_DR,                 /* dr */
+  Z180_SCC_IRQ,                /* irq */
+  CONFIG_Z180_SCC_PARITY,      /* parity */
+  CONFIG_Z180_SCC_BITS,        /* bits */
+  CONFIG_Z180_SCC_2STOP        /* stopbits2 */
+};
+
+static uart_dev_t g_scc_port =
+{
+  0,                           /* open_count */
+  false,                       /* xmitwaiting */
+  false,                       /* recvwaiting */
+#ifdef CONFIG_Z180_SCC_SERIAL_CONSOLE
+  true,                        /* isconsole */
+#else
+  false,                       /* isconsole */
+#endif
+  { 0 },                       /* closesem */
+  { 0 },                       /* xmitsem */
+  { 0 },                       /* recvsem */
+  {
+    { 0 },                     /* xmit.sem */
+    0,                         /* xmit.head */
+    0,                         /* xmit.tail */
+    CONFIG_Z180_SCC_TXBUFSIZE, /* xmit.size */
+    g_scc_txbuffer,            /* xmit.buffer */
+  },
+  {
+    { 0 },                     /* recv.sem */
+    0,                         /* recv.head */
+    0,                         /* recv.tail */
+    CONFIG_Z180_SCC_RXBUFSIZE, /* recv.size */
+    g_scc_rxbuffer,            /* recv.buffer */
+  },
+  &g_uart_ops,                 /* ops */
+  &g_scc_priv,                 /* priv */
+};
+#endif
+
+/* This describes the state of the ESCC Channel A port. */
+
+#ifdef CONFIG_Z180_ESCCA
+static const struct z180_dev_s g_escca_priv =
+{
+  CONFIG_Z180_ESCCA_BAUD,      /* baud */
+  Z182_ESCCA_CR,               /* cr */
+  Z182_ESCCA_DR,               /* dr */
+  Z180_UART1_IRQ,              /* irq */
+  CONFIG_Z180_ESCCA_PARITY,    /* parity */
+  CONFIG_Z180_ESCCA_BITS,      /* bits */
+  CONFIG_Z180_ESCCA_2STOP      /* stopbits2 */
+};
+
+static uart_dev_t g_escca_port =
+{
+  0,                           /* open_count */
+  false,                       /* xmitwaiting */
+  false,                       /* recvwaiting */
+#ifdef CONFIG_Z180_ESCCA_SERIAL_CONSOLE
+  true,                        /* isconsole */
+#else
+  false,                       /* isconsole */
+#endif
+  { 0 },                       /* closesem */
+  { 0 },                       /* xmitsem */
+  { 0 },                       /* recvsem */
+  {
+    { 0 },                     /* xmit.sem */
+    0,                         /* xmit.head */
+    0,                         /* xmit.tail */
+    CONFIG_Z180_ESCCA_TXBUFSIZE, /* xmit.size */
+    g_escca_txbuffer,          /* xmit.buffer */
+  },
+  {
+    { 0 },                     /* recv.sem */
+    0,                         /* recv.head */
+    0,                         /* recv.tail */
+    CONFIG_Z180_ESCCA_RXBUFSIZE, /* recv.size */
+    g_escca_rxbuffer,          /* recv.buffer */
+  },
+  &g_uart_ops,                 /* ops */
+  &g_escca_priv,               /* priv */
+};
+#endif
+
+/* This describes the state of the ESCC Channel B port. */
+
+#ifdef CONFIG_Z180_ESCCB
+static const struct z180_dev_s g_esccb_priv =
+{
+  CONFIG_Z180_ESCCB_BAUD,      /* baud */
+  Z182_ESCCB_CR,               /* cr */
+  Z182_ESCCB_DR,               /* dr */
+  Z180_UART1_IRQ,              /* irq */
+  CONFIG_Z180_ESCCB_PARITY,    /* parity */
+  CONFIG_Z180_ESCCB_BITS,      /* bits */
+  CONFIG_Z180_ESCCB_2STOP      /* stopbits2 */
+};
+
+static uart_dev_t g_escca_port =
+{
+  0,                           /* open_count */
+  false,                       /* xmitwaiting */
+  false,                       /* recvwaiting */
+#ifdef CONFIG_Z180_ESCCA_SERIAL_CONSOLE
+  true,                        /* isconsole */
+#else
+  false,                       /* isconsole */
+#endif
+  { 0 },                       /* closesem */
+  { 0 },                       /* xmitsem */
+  { 0 },                       /* recvsem */
+  {
+    { 0 },                     /* xmit.sem */
+    0,                         /* xmit.head */
+    0,                         /* xmit.tail */
+    CONFIG_Z180_ESCCA_TXBUFSIZE, /* xmit.size */
+    g_escca_txbuffer,          /* xmit.buffer */
+  },
+  {
+    { 0 },                     /* recv.sem */
+    0,                         /* recv.head */
+    0,                         /* recv.tail */
+    CONFIG_Z180_ESCCA_RXBUFSIZE, /* recv.size */
+    g_escca_rxbuffer,          /* recv.buffer */
+  },
+  &g_uart_ops,                 /* ops */
+  &g_escca_priv,               /* priv */
+};
+#endif
+
+/* Now, which one with be tty0/console and which tty1? NOTE: SCC and ESCCA/B and
+ * mutually exclusive.
+ */
+
+#undef CONSOLE_DEV
+#undef TTYS0_DEV 
+#undef TTYS1_DEV
+
+#if defined(CONFIG_Z180_SCC_SERIAL_CONSOLE)
+#  define CONSOLE_DEV     g_scc_port
+#  define TTYS0_DEV       g_scc_port
+#elif defined(CONFIG_Z180_SCC)
+#  define TTYS0_DEV       g_scc_port
+
+#elif defined(CONFIG_Z180_ESCCA_SERIAL_CONSOLE)
+#  define CONSOLE_DEV     g_escca_port
+#  define TTYS0_DEV       g_escca_port
+#  if defined(CONFIG_Z180_ESCCB)
+#    define TTYS1_DEV     g_esccb_port
+#  endif
+
+#elif defined(CONFIG_Z180_ESCCB_SERIAL_CONSOLE)
+#  define CONSOLE_DEV     g_esccb_port
+#  define TTYS0_DEV       g_esccb_port
+#  if defined(CONFIG_Z180_ESCCA)
+#    define TTYS1_DEV     g_escca_port
+#  endif
+
+#elif defined(CONFIG_Z180_ESCCA)
+#  define TTYS0_DEV       g_escca_port
+#  if defined(CONFIG_Z180_ESCCB)
+#    define TTYS1_DEV     g_esccb_port
+# endif
+
+#elif defined(CONFIG_Z180_ESCCB)
+# define TTYS0_DEV       g_esccb_port
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: z180_serialin
+ ****************************************************************************/
+
+static inline uint8_t z180_serialin(struct z180_dev_s *priv, uint8_t regaddr)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_serialout
+ ****************************************************************************/
+
+static inline void z180_serialout(struct z180_dev_s *priv, uint8_t regaddr,
+                                  uint8_t value)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_disableuartint
+ ****************************************************************************/
+
+static inline void z180_disableuartint(struct z180_dev_s *priv)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_restoreuartint
+ ****************************************************************************/
+
+static inline void z180_restoreuartint(struct z180_dev_s *priv, uint8_t bits)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_waittxready
+ ****************************************************************************/
+
+static inline void z180_waittxready(struct z180_dev_s *priv)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_setbaud
+ ****************************************************************************/
+
+static inline void z180_setbaud(struct z180_dev_s *priv, uint24_t baud)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_setup
+ *
+ * Description:
+ *   Configure the UART baud, bits, parity, fifos, etc. This method is called
+ *   the first time that the serial port is opened.
+ *
+ ****************************************************************************/
+
+static int z180_setup(struct uart_dev_s *dev)
+{
+#ifndef CONFIG_SUPPRESS_UART_CONFIG
+#  warning "Missing logic"
+#endif
+  return OK;
+}
+
+/****************************************************************************
+ * Name: z180_shutdown
+ *
+ * Description:
+ *   Disable the UART.  This method is called when the serial port is closed
+ *
+ ****************************************************************************/
+
+static void z180_shutdown(struct uart_dev_s *dev)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_attach
+ *
+ * Description:
+ *   Configure the UART to operation in interrupt driven mode.  This method is
+ *   called when the serial port is opened.  Normally, this is just after the
+ *   the setup() method is called, however, the serial console may operate in
+ *   a non-interrupt driven mode during the boot phase.
+ *
+ *   RX and TX interrupts are not enabled when by the attach method (unless the
+ *   hardware supports multiple levels of interrupt enabling).  The RX and TX
+ *   interrupts are not enabled until the txint() and rxint() methods are called.
+ *
+ ****************************************************************************/
+
+static int z180_attach(struct uart_dev_s *dev)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_detach
+ *
+ * Description:
+ *   Detach UART interrupts.  This method is called when the serial port is
+ *   closed normally just before the shutdown method is called.  The exception
+ *   is the serial console which is never shutdown.
+ *
+ ****************************************************************************/
+
+static void z180_detach(struct uart_dev_s *dev)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_interrrupt
+ *
+ * Description:
+ *   This is the UART interrupt handler.  It will be invoked
+ *   when an interrupt received on the 'irq'  It should call
+ *   uart_transmitchars or uart_receivechar to perform the
+ *   appropriate data transfers.  The interrupt handling logic\
+ *   must be able to map the 'irq' number into the approprite
+ *   uart_dev_s structure in order to call these functions.
+ *
+ ****************************************************************************/
+
+static int z180_interrrupt(int irq, void *context)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_ioctl
+ *
+ * Description:
+ *   All ioctl calls will be routed through this method
+ *
+ ****************************************************************************/
+
+static int z180_ioctl(struct file *filep, int cmd, unsigned long arg)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_receive
+ *
+ * Description:
+ * Called (usually) from the interrupt level to receive one character from
+ * the UART.  Error bits associated with the receipt are provided in the
+ * the return 'status'.
+ *
+ ****************************************************************************/
+
+static int z180_receive(struct uart_dev_s *dev, unsigned int *status)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_rxint
+ *
+ * Description:
+ *   Call to enable or disable RX interrupts
+ *
+ ****************************************************************************/
+
+static void z180_rxint(struct uart_dev_s *dev, bool enable)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_rxavailable
+ *
+ * Description:
+ *   Return true if the receive fifo is not empty
+ *
+ ****************************************************************************/
+
+static bool z180_rxavailable(struct uart_dev_s *dev)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_send
+ *
+ * Description:
+ *   This method will send one byte on the UART
+ *
+ ****************************************************************************/
+
+static void z180_send(struct uart_dev_s *dev, int ch)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_txint
+ *
+ * Description:
+ *   Call to enable or disable TX interrupts
+ *
+ ****************************************************************************/
+
+static void z180_txint(struct uart_dev_s *dev, bool enable)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_txready
+ *
+ * Description:
+ *   Return true if the tranmsit fifo is not full
+ *
+ ****************************************************************************/
+
+static bool z180_txready(struct uart_dev_s *dev)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: z180_txempty
+ *
+ * Description:
+ *   Return true if the transmit fifo is empty
+ *
+ ****************************************************************************/
+
+static bool z180_txempty(struct uart_dev_s *dev)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_serialinit
+ *
+ * Description:
+ *   Register serial console and serial ports.
+ *
+ ****************************************************************************/
+
+void up_serialinit(void)
+{
+  uint8_t regval;
+
+  /* Make sure that all UART interrupts are disabled */
+#warning "Missing logic"
+
+  /* Configure for usage of [E]SCC channels */
+
+#ifdef CONFIG_Z180_SCC
+#  warning "Missing logic"
+#endif
+
+#ifdef CONFIG_Z180_ESCCA
+#  warning "Missing logic"
+#endif
+
+#ifdef CONFIG_Z180_ESCCB
+#  warning "Missing logic"
+#endif
+
+  /* If there is a console, then configure the console now */
+
+#ifdef CONSOLE_DEV
+  CONSOLE_DEV.isconsole = true;
+  z180_setup(&CONSOLE_DEV);
+#endif
+
+  /* Register console and tty devices */
+
+#ifdef CONSOLE_DEV
+  (void)uart_register("/dev/console", &CONSOLE_DEV);
+#endif
+  (void)uart_register("/dev/ttyS0", &TTYS0_DEV);
+#ifdef TTYS1_DEV
+  (void)uart_register("/dev/ttyS1", &TTYS1_DEV);
+#endif
+}
+
+/****************************************************************************
+ * Name: up_putc
+ *
+ * Description:
+ *   Provide priority, low-level access to support OS debug
+ *   writes
+ *
+ ****************************************************************************/
+
+int up_putc(int ch)
+{
+#ifdef CONSOLE_DEV
+#warning "Missing logic"
+  z180_disableuartint(priv);
+
+  /* Check for LF */
+
+  if (ch == '\n')
+    {
+      /* Output CR before LF*/
+#warning "Missing logic"
+
+    }
+
+  /* Output the character */
+
+#warning "Missing logic"
+
+  /* Wait for the character to be sent before re-enabling interrupts */
+ 
+#warning "Missing logic"
+  return ch;
+#endif
+}
+
+#else /* USE_SERIALDRIVER */
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: z180_putc
+ ****************************************************************************/
+
+static void z180_putc(int ch)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_putc
+ ****************************************************************************/
+
+int up_putc(int ch)
+{
+  /* Check for LF */
+
+  if (ch == '\n')
+    {
+      /* Output CR before LF */
+
+      z180_putc('\r');
+    }
+
+  /* Output character */
+
+  z180_putc(ch);
+  return ch;
+}
+
+#endif /* USE_SERIALDRIVER */