stm32h7/console/printk-support.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (C) 2020 embedded brains GmbH & Co. KG
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #ifdef HAVE_CONFIG_H
0029 #include "config.h"
0030 #endif
0031
0032 #include <bsp.h>
0033 #include <rtems/bspIo.h>
0034 #include <rtems/sysinit.h>
0035
0036 #include <stm32h7/hal.h>
0037
0038 static void stm32h7_output_char(char c)
0039 {
0040   stm32h7_uart_polled_write(&STM32H7_PRINTK_INSTANCE.device, c);
0041 }
0042
0043 static void stm32h7_output_char_init(void)
0044 {
0045   UART_HandleTypeDef *uart;
0046
0047   uart = &STM32H7_PRINTK_INSTANCE.uart;
0048   (void) HAL_UART_Init(uart);
0049   (void) HAL_UARTEx_SetTxFifoThreshold(uart, UART_TXFIFO_THRESHOLD_1_8);
0050   (void) HAL_UARTEx_SetRxFifoThreshold(uart, UART_RXFIFO_THRESHOLD_1_8);
0051   (void) HAL_UARTEx_EnableFifoMode(uart);
0052
0053   BSP_output_char = stm32h7_output_char;
0054 }
0055
0056 static void stm32h7_output_char_init_early(char c)
0057 {
0058   stm32h7_output_char_init();
0059   stm32h7_output_char(c);
0060 }
0061
0062 static int stm32h7_poll_char(void)
0063 {
0064   return stm32h7_uart_polled_read(&STM32H7_PRINTK_INSTANCE.device);
0065 }
0066
0067 BSP_output_char_function_type BSP_output_char = stm32h7_output_char_init_early;
0068
0069 BSP_polling_getchar_function_type BSP_poll_char = stm32h7_poll_char;
0070
0071 RTEMS_SYSINIT_ITEM(
0072   stm32h7_output_char_init,
0073   RTEMS_SYSINIT_BSP_START,
0074   RTEMS_SYSINIT_ORDER_LAST_BUT_5
0075 );