/* SPDX-License-Identifier: BSD-2-Clause */
/*
* This file contains the hardware specific portions of the TTY driver
* for the serial ports on the jmr3904.
*
* Logic based on the jmr3904-io.c file in newlib 1.8.2
*/
/*
* COPYRIGHT (c) 1989-2000.
* On-Line Applications Research Corporation (OAR).
*
* 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 <bsp/console-polled.h>
#include <rtems/libio.h>
#include <stdlib.h>
#include <assert.h>
/* external prototypes for monitor interface routines */
#define READ_UINT8( _register_, _value_ ) \
((_value_) = *((volatile unsigned char *)(_register_)))
#define WRITE_UINT8( _register_, _value_ ) \
(*((volatile unsigned char *)(_register_)) = (_value_))
#define READ_UINT16( _register_, _value_ ) \
((_value_) = *((volatile unsigned short *)(_register_)))
#define WRITE_UINT16( _register_, _value_ ) \
(*((volatile unsigned short *)(_register_)) = (_value_))
/* - Board specific addresses for serial chip */
#define DIAG_BASE 0xfffff300
#define DIAG_SLCR (DIAG_BASE+0x00)
#define DIAG_SLSR (DIAG_BASE+0x04)
#define DIAG_SLDICR (DIAG_BASE+0x08)
#define DIAG_SLDISR (DIAG_BASE+0x0C)
#define DIAG_SFCR (DIAG_BASE+0x10)
#define DIAG_SBRG (DIAG_BASE+0x14)
#define DIAG_TFIFO (DIAG_BASE+0x20)
#define DIAG_RFIFO (DIAG_BASE+0x30)
#define BRG_T0 0x0000
#define BRG_T2 0x0100
#define BRG_T4 0x0200
#define BRG_T5 0x0300
/*
* Eventually console-polled.c should hook to this better.
*/
/*
* console_initialize_hardware
*
* This routine initializes the console hardware.
*
*/
void console_initialize_hardware(void)
{
WRITE_UINT16 (DIAG_SLCR, 0x0020);
WRITE_UINT16 (DIAG_SLDICR, 0x0000);
WRITE_UINT16 (DIAG_SFCR, 0x0000);
WRITE_UINT16 (DIAG_SBRG, BRG_T2 | 5);
}
/*
* console_outbyte_polled
*
* This routine transmits a character using polling.
*/
void console_outbyte_polled(
int port,
char ch
)
{
unsigned short disr;
for (;;) {
READ_UINT16 (DIAG_SLDISR, disr);
if (disr & 0x0002)
break;
}
disr = disr & ~0x0002;
WRITE_UINT8 (DIAG_TFIFO, (unsigned char) ch);
WRITE_UINT16 (DIAG_SLDISR, disr);
}
/*
* console_inbyte_nonblocking
*
* This routine polls for a character.
*/
int console_inbyte_nonblocking(
int port
)
{
unsigned char c;
unsigned short disr;
READ_UINT16 (DIAG_SLDISR, disr);
if (disr & 0x0001) {
disr = disr & ~0x0001;
READ_UINT8 (DIAG_RFIFO, c);
WRITE_UINT16 (DIAG_SLDISR, disr);
return (char) c;
}
return -1;
}
#include <rtems/bspIo.h>
static void JMR3904_output_char(char c) { console_outbyte_polled( 0, c ); }
BSP_output_char_function_type BSP_output_char = JMR3904_output_char;
BSP_polling_getchar_function_type BSP_poll_char = NULL;
