mirror of
https://github.com/kelvinlawson/atomthreads.git
synced 2026-08-26 00:00:05 +02:00
05bd1987ea
* STAND_ALONE conditional compilation is removed. * Previous interim commits are squashed. * printk.h is included from atomport.h * atom-types.h and atommport-types.h have been removed. Signed-off-by: Himanshu Chauhan <hschauhan@nulltrace.org>
75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/*
|
|
* Copyright (c) Himanshu Chauhan 2009-11.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* 3. Neither the name of Himanshu Chauhan nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* 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 <system.h>
|
|
#include <atomport.h>
|
|
#include <8250-serial.h>
|
|
|
|
#define PORT1 (void *)0xc00003f8
|
|
|
|
static inline unsigned int serial_in(int offset)
|
|
{
|
|
return ioreadb(PORT1 + offset);
|
|
}
|
|
|
|
static inline void serial_out(int offset, int value)
|
|
{
|
|
iowriteb(PORT1 + offset, value);
|
|
}
|
|
|
|
void putch(uint8_t c)
|
|
{
|
|
while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
|
|
;
|
|
|
|
serial_out(UART_TX, c);
|
|
}
|
|
|
|
void init_console()
|
|
{
|
|
serial_out(1 , 0); /* Turn off interrupts */
|
|
|
|
/* Communication Settings */
|
|
serial_out(3 , 0x80); /* SET DLAB ON */
|
|
serial_out(0 , 0x01); /* Set Baud rate - Divisor Latch Low Byte */
|
|
/* 0x03 = 38,400 BPS */
|
|
/* Default 0x01 = 115,200 BPS */
|
|
/* 0x02 = 57,600 BPS */
|
|
/* 0x06 = 19,200 BPS */
|
|
/* 0x0C = 9,600 BPS */
|
|
/* 0x18 = 4,800 BPS */
|
|
/* 0x30 = 2,400 BPS */
|
|
serial_out(1 , 0x00); /* Set Baud rate - Divisor Latch High Byte */
|
|
serial_out(3 , 0x03); /* 8 Bits, No Parity, 1 Stop Bit */
|
|
serial_out(2 , 0xC7); /* FIFO Control Register */
|
|
serial_out(4 , 0x0B); /* Turn on DTR, RTS, and OUT2 */
|
|
}
|