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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* This file contains the TTY driver for the serial ports on the LEON.
*
* This driver uses the termios pseudo driver.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON3 BSP.
* COPYRIGHT (c) 2011.
* Aeroflex Gaisler.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <bsp.h>
#include <leon.h>
#include <rtems/bspIo.h>
#include <rtems/sysinit.h>
#include <rtems/score/thread.h>
#include <grlib/apbuart.h>
int leon3_debug_uart_index __attribute__((weak)) = 0;
struct apbuart_regs *leon3_debug_uart = NULL;
static void bsp_debug_uart_init(void);
static void bsp_debug_uart_discard(char c)
{
(void) c;
}
static void bsp_debug_uart_output_char(char c)
{
apbuart_outbyte_polled(leon3_debug_uart, c);
apbuart_outbyte_wait(leon3_debug_uart);
}
static int bsp_debug_uart_poll_char(void)
{
return apbuart_inbyte_nonblocking(leon3_debug_uart);
}
static void bsp_debug_uart_pre_init_out(char c)
{
bsp_debug_uart_init();
(*BSP_output_char)(c);
}
/* Initialize the BSP system debug console layer. It will scan AMBA Plu&Play
* for a debug APBUART and enable RX/TX for that UART.
*/
static void bsp_debug_uart_init(void)
{
int i;
struct ambapp_dev *adev;
if ( BSP_output_char != bsp_debug_uart_pre_init_out ) {
return;
}
BSP_output_char = bsp_debug_uart_discard;
/* Update leon3_debug_uart_index to index used as debug console. Let user
* select Debug console by setting leon3_debug_uart_index. If the BSP is to
* provide the default UART (leon3_debug_uart_index==0):
* non-MP: APBUART[0] is debug console
* MP: LEON CPU index select UART
*/
if (leon3_debug_uart_index == 0) {
#if defined(RTEMS_MULTIPROCESSING)
leon3_debug_uart_index = LEON3_Cpu_Index;
#else
leon3_debug_uart_index = 0;
#endif
} else {
leon3_debug_uart_index--; /* User selected dbg-console */
}
/* Find APBUART core for System Debug Console */
i = leon3_debug_uart_index;
adev = (void *)ambapp_for_each(ambapp_plb(), (OPTIONS_ALL|OPTIONS_APB_SLVS),
VENDOR_GAISLER, GAISLER_APBUART,
ambapp_find_by_idx, (void *)&i);
if (adev != NULL) {
struct ambapp_apb_info *apb;
/*
* Found a matching debug console, initialize debug UART if present for
* printk().
*/
apb = (struct ambapp_apb_info *)adev->devinfo;
leon3_debug_uart = (struct apbuart_regs *)apb->start;
leon3_debug_uart->ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE;
leon3_debug_uart->status = 0;
BSP_poll_char = bsp_debug_uart_poll_char;
BSP_output_char = bsp_debug_uart_output_char;
}
}
RTEMS_SYSINIT_ITEM(
bsp_debug_uart_init,
RTEMS_SYSINIT_BSP_START,
RTEMS_SYSINIT_ORDER_FOURTH
);
BSP_output_char_function_type BSP_output_char = bsp_debug_uart_pre_init_out;
BSP_polling_getchar_function_type BSP_poll_char;
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