844 lines
25 KiB
C
844 lines
25 KiB
C
/****************************************************************************
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* arch/z80/src/ez08/ez80_serial.c
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*
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* Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <semaphore.h>
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/serial/serial.h>
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#include <arch/serial.h>
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#include <arch/io.h>
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#include "chip/chip.h"
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#include "up_internal.h"
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#ifdef USE_SERIALDRIVER
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct ez80_dev_s
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{
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uint16_t uartbase; /* Base address of UART registers */
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unsigned int baud; /* Configured baud */
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uint8_t irq; /* IRQ associated with this UART */
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uint8_t parity; /* 0=none, 1=odd, 2=even */
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uint8_t bits; /* Number of bits (7 or 8) */
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bool stopbits2; /* true: Configure with 2 (vs 1) */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int ez80_setup(struct uart_dev_s *dev);
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static void ez80_shutdown(struct uart_dev_s *dev);
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static int ez80_attach(struct uart_dev_s *dev);
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static void ez80_detach(struct uart_dev_s *dev);
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static int ez80_interrupt(int irq, void *context);
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static int ez80_ioctl(struct file *filep, int cmd, unsigned long arg);
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static int ez80_receive(struct uart_dev_s *dev, unsigned int *status);
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static void ez80_rxint(struct uart_dev_s *dev, bool enable);
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static bool ez80_rxavailable(struct uart_dev_s *dev);
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static void ez80_send(struct uart_dev_s *dev, int ch);
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static void ez80_txint(struct uart_dev_s *dev, bool enable);
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static bool ez80_txready(struct uart_dev_s *dev);
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static bool ez80_txempty(struct uart_dev_s *dev);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct uart_ops_s g_uart_ops =
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{
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ez80_setup, /* setup */
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ez80_shutdown, /* shutdown */
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ez80_attach, /* attach */
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ez80_detach, /* detach */
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ez80_ioctl, /* ioctl */
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ez80_receive, /* receive */
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ez80_rxint, /* rxint */
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ez80_rxavailable, /* rxavailable */
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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NULL, /* rxflowcontrol */
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#endif
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ez80_send, /* send */
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ez80_txint, /* txint */
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ez80_txready, /* txready */
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ez80_txempty /* txempty */
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};
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/* I/O buffers */
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#ifdef CONFIG_EZ80_UART0
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static char g_uart0rxbuffer[CONFIG_UART0_RXBUFSIZE];
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static char g_uart0txbuffer[CONFIG_UART0_TXBUFSIZE];
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#endif
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#ifdef CONFIG_EZ80_UART1
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static char g_uart1rxbuffer[CONFIG_UART1_RXBUFSIZE];
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static char g_uart1txbuffer[CONFIG_UART1_TXBUFSIZE];
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#endif
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/* This describes the state of the UART0 port. */
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#ifdef CONFIG_EZ80_UART0
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static struct ez80_dev_s g_uart0priv =
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{
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EZ80_UART0_BASE, /* uartbase */
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CONFIG_UART0_BAUD, /* baud */
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EZ80_UART0_IRQ, /* irq */
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CONFIG_UART0_PARITY, /* parity */
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CONFIG_UART0_BITS, /* bits */
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CONFIG_UART0_2STOP /* stopbits2 */
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};
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static uart_dev_t g_uart0port =
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{
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0, /* open_count */
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false, /* xmitwaiting */
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false, /* recvwaiting */
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#ifdef CONFIG_UART0_SERIAL_CONSOLE
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true, /* isconsole */
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#else
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false, /* isconsole */
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#endif
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{ 0 }, /* closesem */
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{ 0 }, /* xmitsem */
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{ 0 }, /* recvsem */
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{
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{ 0 }, /* xmit.sem */
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0, /* xmit.head */
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0, /* xmit.tail */
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CONFIG_UART0_TXBUFSIZE, /* xmit.size */
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g_uart0txbuffer, /* xmit.buffer */
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},
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{
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{ 0 }, /* recv.sem */
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0, /* recv.head */
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0, /* recv.tail */
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CONFIG_UART0_RXBUFSIZE, /* recv.size */
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g_uart0rxbuffer, /* recv.buffer */
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},
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&g_uart_ops, /* ops */
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&g_uart0priv, /* priv */
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};
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#endif
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/* This describes the state of the UART1 port. */
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#ifdef CONFIG_EZ80_UART1
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static struct ez80_dev_s g_uart1priv =
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{
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EZ80_UART1_BASE, /* uartbase */
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CONFIG_UART1_BAUD, /* baud */
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EZ80_UART1_IRQ, /* irq */
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CONFIG_UART1_PARITY, /* parity */
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CONFIG_UART1_BITS, /* bits */
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CONFIG_UART1_2STOP /* stopbits2 */
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};
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static uart_dev_t g_uart1port =
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{
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0, /* open_count */
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false, /* xmitwaiting */
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false, /* recvwaiting */
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#ifdef CONFIG_UART1_SERIAL_CONSOLE
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true, /* isconsole */
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#else
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false, /* isconsole */
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#endif
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{ 0 }, /* closesem */
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{ 0 }, /* xmitsem */
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{ 0 }, /* recvsem */
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{
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{ 0 }, /* xmit.sem */
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0, /* xmit.head */
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0, /* xmit.tail */
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CONFIG_UART1_TXBUFSIZE, /* xmit.size */
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g_uart1txbuffer, /* xmit.buffer */
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},
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{
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{ 0 }, /* recv.sem */
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0, /* recv.head */
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0, /* recv.tail */
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CONFIG_UART1_RXBUFSIZE, /* recv.size */
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g_uart1rxbuffer, /* recv.buffer */
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},
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&g_uart_ops, /* ops */
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&g_uart1priv, /* priv */
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};
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#endif
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/* Now, which one with be tty0/console and which tty1? */
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#if defined(CONFIG_UART0_SERIAL_CONSOLE) && defined(CONFIG_EZ80_UART0)
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# define CONSOLE_DEV g_uart0port
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# define TTYS0_DEV g_uart0port
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# if defined(CONFIG_EZ80_UART1)
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# define TTYS1_DEV g_uart1port
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# endif
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#elif defined(CONFIG_UART1_SERIAL_CONSOLE) && defined(CONFIG_EZ80_UART1)
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# define CONSOLE_DEV g_uart1port
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# define TTYS0_DEV g_uart1port
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# if defined(CONFIG_EZ80_UART0)
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# define TTYS1_DEV g_uart0port
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# endif
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#elif defined(CONFIG_EZ80_UART0)
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# define TTYS0_DEV g_uart0port
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# if defined(CONFIG_EZ80_UART1)
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# define TTYS1_DEV g_uart1port
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# endif
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#elif defined(CONFIG_EZ80_UART0)
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# define TTYS0_DEV g_uart1port
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ez80_serialin
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****************************************************************************/
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static inline uint8_t ez80_serialin(struct ez80_dev_s *priv, uint8_t offset)
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{
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return inp(priv->uartbase + offset);
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}
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/****************************************************************************
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* Name: ez80_serialout
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****************************************************************************/
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static inline void ez80_serialout(struct ez80_dev_s *priv, uint8_t offset,
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uint8_t value)
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{
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outp(priv->uartbase + offset, value);
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}
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/****************************************************************************
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* Name: ez80_disableuartint
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****************************************************************************/
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static inline void ez80_disableuartint(struct ez80_dev_s *priv)
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{
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uint8_t ier = ez80_serialin(priv, EZ80_UART_IER);
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ier &= ~EZ80_UARTEIR_INTMASK;
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ez80_serialout(priv, EZ80_UART_IER, ier);
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}
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/****************************************************************************
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* Name: ez80_restoreuartint
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****************************************************************************/
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static inline void ez80_restoreuartint(struct ez80_dev_s *priv, uint8_t bits)
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{
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uint8_t ier = ez80_serialin(priv, EZ80_UART_IER);
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ier |= bits & (EZ80_UARTEIR_TIE|EZ80_UARTEIR_RIE);
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ez80_serialout(priv, EZ80_UART_IER, ier);
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}
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/****************************************************************************
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* Name: ez80_waittxready
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****************************************************************************/
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static inline void ez80_waittxready(struct ez80_dev_s *priv)
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{
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int tmp;
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for (tmp = 1000 ; tmp > 0 ; tmp--)
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{
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if ((ez80_serialin(priv, EZ80_UART_LSR) & EZ80_UARTLSR_THRE) != 0)
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{
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break;
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}
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}
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}
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/****************************************************************************
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* Name: ez80_setbaud
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****************************************************************************/
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static inline void ez80_setbaud(struct ez80_dev_s *priv, uint24_t baud)
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{
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uint32_t brg_divisor;
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uint8_t lctl;
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/* The resulting BAUD and depends on the system clock frequency and the
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* BRG divisor as follows:
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*
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* BAUD = SYSTEM_CLOCK_FREQUENCY / (16 * BRG_Divisor)
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*
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* Or
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*
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* BRG_Divisor = SYSTEM_CLOCK_FREQUENCY / 16 / BAUD
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*/
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brg_divisor = (ez80_systemclock + (baud << 3)) / (baud << 4);
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/* Set the DLAB bit to enable access to the BRG registers */
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lctl = ez80_serialin(priv, EZ80_UART_LCTL);
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lctl |= EZ80_UARTLCTL_DLAB;
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ez80_serialout(priv, EZ80_UART_LCTL, lctl);
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ez80_serialout(priv, EZ80_UART_BRGL, (uint8_t)(brg_divisor & 0xff));
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ez80_serialout(priv, EZ80_UART_BRGH, (uint8_t)(brg_divisor >> 8));
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lctl &= ~EZ80_UARTLCTL_DLAB;
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ez80_serialout(priv, EZ80_UART_LCTL, lctl);
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}
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/****************************************************************************
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* Name: ez80_setup
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*
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* Description:
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* Configure the UART baud, bits, parity, fifos, etc. This method is called
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* the first time that the serial port is opened.
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*
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****************************************************************************/
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static int ez80_setup(struct uart_dev_s *dev)
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{
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#ifndef CONFIG_SUPPRESS_UART_CONFIG
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struct ez80_dev_s *priv = dev->priv;
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uint8_t reg;
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uint8_t cval;
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if (priv->bits == 7)
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{
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cval = EZ80_UARTCHAR_7BITS;
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}
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else
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{
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cval = EZ80_UARTCHAR_8BITS;
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}
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if (priv->stopbits2)
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{
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cval |= EZ80_UARTLCTL_2STOP;
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}
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if (priv->parity == 1) /* Odd parity */
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{
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cval |= (EZ80_UARTLCTL_PEN);
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}
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else if (priv->parity == 2) /* Even parity */
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{
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cval |= (EZ80_UARTLCTL_PEN|EZ80_UARTLCTL_EPS);
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}
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/* Set the baud rate */
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ez80_disableuartint(priv);
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ez80_setbaud(priv, priv->baud);
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ez80_serialout(priv, EZ80_UART_MCTL, 0);
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/* Set the character properties */
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reg = (ez80_serialin(priv, EZ80_UART_LCTL) & ~EZ80_UARTLCTL_MASK) | cval;
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ez80_serialout(priv, EZ80_UART_LCTL, reg);
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/* Enable and flush the receive FIFO */
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reg = EZ80_UARTFCTL_FIFOEN;
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ez80_serialout(priv, EZ80_UART_FCTL, reg);
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reg |= (EZ80_UARTFCTL_CLRTxF|EZ80_UARTFCTL_CLRRxF);
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ez80_serialout(priv, EZ80_UART_FCTL, reg);
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/* Set the receive trigger level to 4 */
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reg |= EZ80_UARTTRIG_4;
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ez80_serialout(priv, EZ80_UART_FCTL, reg);
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#endif
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return OK;
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}
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/****************************************************************************
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* Name: ez80_shutdown
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*
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* Description:
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* Disable the UART. This method is called when the serial port is closed
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*
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****************************************************************************/
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static void ez80_shutdown(struct uart_dev_s *dev)
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{
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struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
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ez80_disableuartint(priv);
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}
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/****************************************************************************
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* Name: ez80_attach
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*
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* Description:
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* Configure the UART to operation in interrupt driven mode. This method is
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* called when the serial port is opened. Normally, this is just after the
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* the setup() method is called, however, the serial console may operate in
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* a non-interrupt driven mode during the boot phase.
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*
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* RX and TX interrupts are not enabled when by the attach method (unless the
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* hardware supports multiple levels of interrupt enabling). The RX and TX
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* interrupts are not enabled until the txint() and rxint() methods are called.
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*
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****************************************************************************/
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static int ez80_attach(struct uart_dev_s *dev)
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{
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struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
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/* Attach the IRQ */
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return irq_attach(priv->irq, ez80_interrupt);
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}
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/****************************************************************************
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* Name: ez80_detach
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*
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* Description:
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* Detach UART interrupts. This method is called when the serial port is
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* closed normally just before the shutdown method is called. The exception
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* is the serial console which is never shutdown.
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*
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****************************************************************************/
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static void ez80_detach(struct uart_dev_s *dev)
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{
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struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
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ez80_disableuartint(priv);
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irq_detach(priv->irq);
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}
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/****************************************************************************
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* Name: ez80_interrupt
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*
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* Description:
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* This is the UART interrupt handler. It will be invoked
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* when an interrupt received on the 'irq' It should call
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* uart_transmitchars or uart_receivechar to perform the
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* appropriate data transfers. The interrupt handling logic\
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* must be able to map the 'irq' number into the approprite
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* uart_dev_s structure in order to call these functions.
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*
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****************************************************************************/
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static int ez80_interrupt(int irq, void *context)
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{
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struct uart_dev_s *dev = NULL;
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struct ez80_dev_s *priv;
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volatile uint32_t cause;
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#ifdef CONFIG_EZ80_UART0
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if (g_uart0priv.irq == irq)
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{
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dev = &g_uart0port;
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}
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else
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#endif
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#ifdef CONFIG_EZ80_UART1
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if (g_uart1priv.irq == irq)
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{
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dev = &g_uart1port;
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}
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else
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#endif
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{
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PANIC();
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}
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priv = (struct ez80_dev_s*)dev->priv;
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cause = ez80_serialin(priv, EZ80_UART_IIR) & EZ80_UARTIIR_CAUSEMASK;
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/* Check for character timeout (CTO) or Receiver Data Ready (RDR) */
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if (cause == EZ80_UARTINSTS_CTO || cause == EZ80_UARTINSTS_RDR)
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{
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/* Receive characters from the RX fifo */
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uart_recvchars(dev);
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}
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/* Check for transmission buffer empty */
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else if (cause == EZ80_UARTINSTS_TBE)
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{
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uart_xmitchars(dev);
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}
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return OK;
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}
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|
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/****************************************************************************
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|
* Name: ez80_ioctl
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|
*
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* Description:
|
|
* All ioctl calls will be routed through this method
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int ez80_ioctl(struct file *filep, int cmd, unsigned long arg)
|
|
{
|
|
return -ENOTTY;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_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 ez80_receive(struct uart_dev_s *dev, unsigned int *status)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
uint8_t rbr = ez80_serialin(priv, EZ80_UART_RBR);
|
|
uint8_t lsr = ez80_serialin(priv, EZ80_UART_LSR);
|
|
|
|
*status = (unsigned int)lsr;
|
|
return rbr;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_rxint
|
|
*
|
|
* Description:
|
|
* Call to enable or disable RX interrupts
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void ez80_rxint(struct uart_dev_s *dev, bool enable)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
uint8_t ier = ez80_serialin(priv, EZ80_UART_IER);
|
|
|
|
if (enable)
|
|
{
|
|
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
|
|
ier |= EZ80_UARTEIR_RIE;
|
|
ez80_serialout(priv, EZ80_UART_IER, ier);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
ier &= ~EZ80_UARTEIR_RIE;
|
|
ez80_serialout(priv, EZ80_UART_IER, ier);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_rxavailable
|
|
*
|
|
* Description:
|
|
* Return true if the receive fifo is not empty
|
|
*
|
|
****************************************************************************/
|
|
|
|
static bool ez80_rxavailable(struct uart_dev_s *dev)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
return (ez80_serialin(priv, EZ80_UART_LSR) & EZ80_UARTLSR_DR) != 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_send
|
|
*
|
|
* Description:
|
|
* This method will send one byte on the UART
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void ez80_send(struct uart_dev_s *dev, int ch)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
ez80_serialout(priv, EZ80_UART_THR, (uint8_t)ch);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_txint
|
|
*
|
|
* Description:
|
|
* Call to enable or disable TX interrupts
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void ez80_txint(struct uart_dev_s *dev, bool enable)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
uint8_t ier = ez80_serialin(priv, EZ80_UART_IER);
|
|
|
|
if (enable)
|
|
{
|
|
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
|
|
ier |= EZ80_UARTEIR_TIE;
|
|
ez80_serialout(priv, EZ80_UART_IER, ier);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
ier &= ~EZ80_UARTEIR_TIE;
|
|
ez80_serialout(priv, EZ80_UART_IER, ier);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_txready
|
|
*
|
|
* Description:
|
|
* Return true if the tranmsit fifo is not full
|
|
*
|
|
****************************************************************************/
|
|
|
|
static bool ez80_txready(struct uart_dev_s *dev)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
return (ez80_serialin(priv, EZ80_UART_LSR) & EZ80_UARTLSR_THRE) != 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_txempty
|
|
*
|
|
* Description:
|
|
* Return true if the transmit fifo is empty
|
|
*
|
|
****************************************************************************/
|
|
|
|
static bool ez80_txempty(struct uart_dev_s *dev)
|
|
{
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)dev->priv;
|
|
return (ez80_serialin(priv, EZ80_UART_LSR) & EZ80_UARTLSR_TEMT) != 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* 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 */
|
|
|
|
ez80_disableuartint(TTYS0_DEV.priv);
|
|
#ifdef TTYS1_DEV
|
|
ez80_disableuartint(TTYS1_DEV.priv);
|
|
#endif
|
|
|
|
/* Configure pins for usage of UARTs */
|
|
|
|
#ifdef CONFIG_EZ80_UART0
|
|
/* Set Port D, pins 0 and 1 for their alternate function (Mode 7) to enable UART0 */
|
|
|
|
regval = inp(EZ80_PD_DDR);
|
|
regval |= 3;
|
|
outp(EZ80_PD_DDR, regval);
|
|
|
|
regval = inp(EZ80_PD_ALT1);
|
|
regval &= ~3;
|
|
outp(EZ80_PD_ALT1, regval);
|
|
|
|
regval = inp(EZ80_PD_ALT2);
|
|
regval |= 3;
|
|
outp(EZ80_PD_ALT2, regval);
|
|
#endif
|
|
|
|
#ifdef CONFIG_EZ80_UART1
|
|
/* Set Port C, pins 0 and 1 for their alternate function (Mode 7) to enable UART1 */
|
|
|
|
regval = inp(EZ80_PC_DDR);
|
|
regval |= 3;
|
|
outp(EZ80_PC_DDR, regval);
|
|
|
|
regval = inp(EZ80_PC_ALT1);
|
|
regval &= ~3;
|
|
outp(EZ80_PC_ALT1, regval);
|
|
|
|
regval = inp(EZ80_PC_ALT2);
|
|
regval |= 3;
|
|
outp(EZ80_PC_ALT2, regval);
|
|
#endif
|
|
|
|
/* If there is a console, then configure the console now */
|
|
|
|
#ifdef CONSOLE_DEV
|
|
CONSOLE_DEV.isconsole = true;
|
|
ez80_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
|
|
struct ez80_dev_s *priv = (struct ez80_dev_s*)CONSOLE_DEV.priv;
|
|
uint8_t ier = ez80_serialin(priv, EZ80_UART_IER);
|
|
|
|
ez80_disableuartint(priv);
|
|
|
|
/* Check for LF */
|
|
|
|
if (ch == '\n')
|
|
{
|
|
/* Output CR before LF*/
|
|
|
|
ez80_waittxready(priv);
|
|
ez80_serialout(priv, EZ80_UART_THR, '\r');
|
|
}
|
|
|
|
/* Output the character */
|
|
|
|
ez80_waittxready(priv);
|
|
ez80_serialout(priv, EZ80_UART_THR, (uint8_t)ch);
|
|
|
|
/* Wait for the character to be sent before re-enabling interrupts */
|
|
|
|
ez80_waittxready(priv);
|
|
ez80_restoreuartint(priv, ier);
|
|
return ch;
|
|
#endif
|
|
}
|
|
|
|
#else /* USE_SERIALDRIVER */
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_UART1_SERIAL_CONSOLE
|
|
# define ez80_inp(offs) inp((EZ80_UART1_BASE+(offs)))
|
|
# define ez80_outp(offs,val) outp((EZ80_UART1_BASE+(offs)), (val))
|
|
#else
|
|
# define ez80_inp(offs) inp((EZ80_UART0_BASE+(offs)))
|
|
# define ez80_outp(offs,val) outp((EZ80_UART0_BASE+(offs)), (val))
|
|
#endif
|
|
|
|
#define ez80_txready() ((ez80_inp(EZ80_UART_LSR) & EZ80_UARTLSR_THRE) != 0)
|
|
#define ez80_send(ch) ez80_outp(EZ80_UART_THR, ch)
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: ez80_putc
|
|
****************************************************************************/
|
|
|
|
static void ez80_putc(int ch)
|
|
{
|
|
int tmp;
|
|
for (tmp = 1000 ; tmp > 0 && !ez80_txready(); tmp--);
|
|
ez80_send(ch);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_putc
|
|
****************************************************************************/
|
|
|
|
int up_putc(int ch)
|
|
{
|
|
/* Check for LF */
|
|
|
|
if (ch == '\n')
|
|
{
|
|
/* Output CR before LF */
|
|
|
|
ez80_putc('\r');
|
|
}
|
|
|
|
/* Output character */
|
|
|
|
ez80_putc(ch);
|
|
return ch;
|
|
}
|
|
|
|
#endif /* USE_SERIALDRIVER */
|