179 lines
4.4 KiB
C
179 lines
4.4 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2004 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Serial port emulator for hosted environments.
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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*/
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#include "cfg/cfg_ser.h"
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#include <cfg/debug.h>
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#include <cfg/compiler.h>
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#include <drv/ser.h>
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#include <drv/ser_p.h>
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#include <struct/fifobuf.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h> /* open() */
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#include <unistd.h> /* read(), write() */
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/* From the high-level serial driver */
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extern struct Serial ser_handles[SER_CNT];
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/* TX and RX buffers */
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static unsigned char uart0_txbuffer[CONFIG_UART0_TXBUFSIZE];
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static unsigned char uart0_rxbuffer[CONFIG_UART0_RXBUFSIZE];
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static unsigned char uart1_txbuffer[CONFIG_UART1_TXBUFSIZE];
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static unsigned char uart1_rxbuffer[CONFIG_UART1_RXBUFSIZE];
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/**
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* Internal state structure
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*/
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struct EmulSerial
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{
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struct SerialHardware hw;
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struct Serial *ser;
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int fd;
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};
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/*
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* Callbacks
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*/
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static void uart_init(struct SerialHardware *_hw, struct Serial *ser)
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{
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struct EmulSerial *hw = (struct EmulSerial *)_hw;
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hw->ser = ser;
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hw->fd = open("/dev/ttyS0", O_RDWR);
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}
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static void uart_cleanup(UNUSED_ARG(struct SerialHardware *, _hw))
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{
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struct EmulSerial *hw = (struct EmulSerial *)_hw;
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close(hw->fd);
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hw->fd = -1;
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}
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static void uart_txStart(struct SerialHardware * _hw)
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{
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struct EmulSerial *hw = (struct EmulSerial *)_hw;
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while(!fifo_isempty(&hw->ser->txfifo))
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{
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char c = fifo_pop(&hw->ser->txfifo);
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write(hw->fd, &c, 1);
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}
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}
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static bool uart_txSending(UNUSED_ARG(struct SerialHardware *, _hw))
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{
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return false;
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}
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static void uart_setBaudrate(UNUSED_ARG(struct SerialHardware *, _hw), unsigned long rate)
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{
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TRACEMSG("rate=%lu", rate);
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// TODO
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}
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static void uart_setParity(UNUSED_ARG(struct SerialHardware *, _hw), int parity)
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{
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TRACEMSG("parity=%d", parity);
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// TODO
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}
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// FIXME: move into compiler.h? Ditch?
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#if COMPILER_C99
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#define C99INIT(name,val) .name = val
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#elif defined(__GNUC__)
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#define C99INIT(name,val) name: val
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#else
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#warning No designated initializers, double check your code
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#define C99INIT(name,val) (val)
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#endif
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/*
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* High-level interface data structures.
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*/
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static const struct SerialHardwareVT uart_vtable =
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{
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C99INIT(init, uart_init),
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C99INIT(cleanup, uart_cleanup),
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C99INIT(setBaudrate, uart_setBaudrate),
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C99INIT(setParity, uart_setParity),
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C99INIT(txStart, uart_txStart),
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C99INIT(txSending, uart_txSending),
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};
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static struct EmulSerial UARTDescs[SER_CNT] =
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{
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{
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C99INIT(hw, /**/) {
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C99INIT(table, &uart_vtable),
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C99INIT(txbuffer, uart0_txbuffer),
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C99INIT(rxbuffer, uart0_rxbuffer),
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C99INIT(txbuffer_size, sizeof(uart0_txbuffer)),
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C99INIT(rxbuffer_size, sizeof(uart0_rxbuffer)),
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},
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C99INIT(ser, NULL),
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C99INIT(fd, -1),
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},
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{
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C99INIT(hw, /**/) {
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C99INIT(table, &uart_vtable),
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C99INIT(txbuffer, uart1_txbuffer),
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C99INIT(rxbuffer, uart1_rxbuffer),
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C99INIT(txbuffer_size, sizeof(uart1_txbuffer)),
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C99INIT(rxbuffer_size, sizeof(uart1_rxbuffer)),
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},
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C99INIT(ser, NULL),
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C99INIT(fd, -1),
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},
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};
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struct SerialHardware *ser_hw_getdesc(int unit)
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{
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ASSERT(unit < SER_CNT);
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return &UARTDescs[unit].hw;
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}
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