csb350/console/console-io.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  This file contains the hardware specific portions of the TTY driver
0005  *  for the serial ports on the csb350.
0006  */
0007
0008 /*
0009  *  COPYRIGHT (c) 1989-2000.
0010  *  On-Line Applications Research Corporation (OAR).
0011  *
0012  * Redistribution and use in source and binary forms, with or without
0013  * modification, are permitted provided that the following conditions
0014  * are met:
0015  * 1. Redistributions of source code must retain the above copyright
0016  *    notice, this list of conditions and the following disclaimer.
0017  * 2. Redistributions in binary form must reproduce the above copyright
0018  *    notice, this list of conditions and the following disclaimer in the
0019  *    documentation and/or other materials provided with the distribution.
0020  *
0021  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0022  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0023  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0024  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0025  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0026  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0027  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0028  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0029  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0030  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0031  * POSSIBILITY OF SUCH DAMAGE.
0032  */
0033
0034 #include <bsp.h>
0035 #include <bsp/console-polled.h>
0036 #include <rtems/libio.h>
0037 #include <libcpu/au1x00.h>
0038
0039 /*
0040  *  console_initialize_hardware
0041  *
0042  *  This routine initializes the console hardware.
0043  *
0044  */
0045 void console_initialize_hardware(void)
0046 {
0047     uart0->fifoctrl = 0xf1;   /* enable fifo, max sizes */
0048     au_sync();
0049 }
0050
0051
0052 /*
0053  *  console_outbyte_polled
0054  *
0055  *  This routine transmits a character using polling.
0056  */
0057 void console_outbyte_polled(
0058   int  port,
0059   char ch
0060 )
0061 {
0062     /* wait for the fifo to make room */
0063     while ((uart0->linestat & 0x20) == 0) {
0064         continue;
0065     }
0066
0067     uart0->txdata = ch;
0068     au_sync();
0069 }
0070 /*
0071  *  console_inbyte_nonblocking
0072  *
0073  *  This routine polls for a character.
0074  */
0075
0076 int console_inbyte_nonblocking(
0077   int port
0078 )
0079 {
0080   unsigned char c;
0081
0082   if (uart0->linestat & 1) {
0083       c = (char)uart0->rxdata;
0084       return c;
0085   } else {
0086       return -1;
0087   }
0088 }
0089
0090 #include <rtems/bspIo.h>
0091
0092 static void csb250_output_char(char c)
0093 {
0094     console_outbyte_polled( 0, c );
0095 }
0096
0097 static int csb250_get_char(void)
0098 {
0099   return console_inbyte_nonblocking(0);
0100 }
0101
0102 BSP_output_char_function_type           BSP_output_char = csb250_output_char;
0103 BSP_polling_getchar_function_type       BSP_poll_char = csb250_get_char;
0104