microblaze_fpga/console/debug-io.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSBSPsMicroblaze
0007  *
0008  * @brief MicroBlaze debug IO support
0009  */
0010
0011 /*
0012  * Copyright (C) 2015 Hesham Almatary
0013  * Copyright (C) 2021 On-Line Applications Research Corporation (OAR)
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #include <dev/serial/uartlite_l.h>
0038 #include <rtems/bspIo.h>
0039
0040 #include <bsp.h>
0041 #include <bspopts.h>
0042
0043 static uint32_t mblaze_uart_base = 0;
0044
0045 static void output_char( char c )
0046 {
0047   if (mblaze_uart_base == 0 ) {
0048     mblaze_uart_base = try_get_prop_from_device_tree(
0049       "xlnx,xps-uartlite-1.00.a",
0050       "reg",
0051       BSP_MICROBLAZE_FPGA_UART_BASE
0052     );
0053   }
0054
0055     if ( c == '\n' ) {
0056     XUartLite_SendByte( mblaze_uart_base, '\r' );
0057   }
0058   XUartLite_SendByte( mblaze_uart_base, c );
0059 }
0060
0061 static int xUartLite_RecvByte( int minor )
0062 {
0063   if (mblaze_uart_base == 0 ) {
0064     mblaze_uart_base = try_get_prop_from_device_tree(
0065       "xlnx,xps-uartlite-1.00.a",
0066       "reg",
0067       BSP_MICROBLAZE_FPGA_UART_BASE
0068     );
0069   }
0070
0071   if ( XUartLite_IsReceiveEmpty( mblaze_uart_base ) ) {
0072     return -1;
0073   }
0074
0075   return XUartLite_ReadReg( mblaze_uart_base, XUL_RX_FIFO_OFFSET );
0076 }
0077
0078 static int get_char( void )
0079 {
0080   return xUartLite_RecvByte( 0 );
0081 }
0082
0083 BSP_output_char_function_type BSP_output_char = output_char;
0084
0085 BSP_polling_getchar_function_type BSP_poll_char = get_char;