forked from Imagelibrary/rtems
159 lines
4.6 KiB
C
159 lines
4.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* This file contains the TTY driver for the serial ports on the LEON.
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*
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* This driver uses the termios pseudo driver.
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* Modified for LEON3 BSP.
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* COPYRIGHT (c) 2011.
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* Aeroflex Gaisler.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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#include <bsp.h>
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#include <bsp/leon3.h>
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#include <rtems/bspIo.h>
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#include <rtems/sysinit.h>
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#include <grlib/apbuart.h>
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#include <grlib/io.h>
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#if !defined(LEON3_APBUART_BASE)
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#include <grlib/ambapp.h>
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int leon3_debug_uart_index __attribute__((weak)) = 0;
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apbuart *leon3_debug_uart = NULL;
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#endif
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static void bsp_debug_uart_init(void);
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static void apbuart_enable_receive_and_transmit(apbuart *regs)
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{
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uint32_t ctrl;
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ctrl = grlib_load_32(®s->ctrl);
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ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE;
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grlib_store_32(®s->ctrl, ctrl);
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grlib_store_32(®s->status, 0);
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}
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static void bsp_debug_uart_output_char(char c)
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{
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apbuart_outbyte_polled(leon3_debug_uart, c);
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apbuart_outbyte_wait(leon3_debug_uart);
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}
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static int bsp_debug_uart_poll_char(void)
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{
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return apbuart_inbyte_nonblocking(leon3_debug_uart);
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}
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static void bsp_debug_uart_pre_init_out(char c)
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{
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bsp_debug_uart_init();
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(*BSP_output_char)(c);
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}
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#if defined(LEON3_APBUART_BASE)
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static void bsp_debug_uart_init(void)
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{
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apbuart_enable_receive_and_transmit(leon3_debug_uart);
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BSP_poll_char = bsp_debug_uart_poll_char;
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BSP_output_char = bsp_debug_uart_output_char;
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}
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#else /* !LEON3_APBUART_BASE */
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static void bsp_debug_uart_discard(char c)
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{
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(void) c;
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}
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/* Initialize the BSP system debug console layer. It will scan AMBA Plu&Play
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* for a debug APBUART and enable RX/TX for that UART.
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*/
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static void bsp_debug_uart_init(void)
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{
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int i;
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struct ambapp_dev *adev;
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if ( BSP_output_char != bsp_debug_uart_pre_init_out ) {
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return;
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}
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BSP_output_char = bsp_debug_uart_discard;
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/* Update leon3_debug_uart_index to index used as debug console. Let user
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* select Debug console by setting leon3_debug_uart_index. If the BSP is to
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* provide the default UART (leon3_debug_uart_index==0):
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* non-MP: APBUART[0] is debug console
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* MP: LEON CPU index select UART
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*/
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if (leon3_debug_uart_index == 0) {
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#if defined(RTEMS_MULTIPROCESSING)
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leon3_debug_uart_index = LEON3_Cpu_Index;
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#else
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leon3_debug_uart_index = 0;
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#endif
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} else {
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leon3_debug_uart_index--; /* User selected dbg-console */
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}
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/* Find APBUART core for System Debug Console */
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i = leon3_debug_uart_index;
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adev = (void *)ambapp_for_each(ambapp_plb(), (OPTIONS_ALL|OPTIONS_APB_SLVS),
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VENDOR_GAISLER, GAISLER_APBUART,
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ambapp_find_by_idx, (void *)&i);
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if (adev != NULL) {
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struct ambapp_apb_info *apb;
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/*
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* Found a matching debug console, initialize debug UART if present for
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* printk().
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*/
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apb = (struct ambapp_apb_info *)adev->devinfo;
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leon3_debug_uart = (apbuart *)apb->start;
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apbuart_enable_receive_and_transmit(leon3_debug_uart);
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BSP_poll_char = bsp_debug_uart_poll_char;
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BSP_output_char = bsp_debug_uart_output_char;
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}
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}
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#endif /* LEON3_APBUART_BASE */
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RTEMS_SYSINIT_ITEM(
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bsp_debug_uart_init,
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RTEMS_SYSINIT_BSP_START,
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RTEMS_SYSINIT_ORDER_FOURTH
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);
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BSP_output_char_function_type BSP_output_char = bsp_debug_uart_pre_init_out;
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BSP_polling_getchar_function_type BSP_poll_char;
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