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81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/*
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* Copyright (c) Himanshu Chauhan 2009-11.
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* All rights reserved.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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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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* 3. Neither the name of Himanshu Chauhan nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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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 <system.h>
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#include <atomport-types.h>
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#include <stdarg.h>
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#include <8250-serial.h>
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#define PORT1 (void *)0x140003f8
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#define PORT2 (void *)0x140002F8
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#define PORT3 (void *)0x140003E8
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#define PORT4 (void *)0x140002E8
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static inline unsigned int serial_in(int offset)
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{
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return ioreadb(PORT1 + offset);
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}
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static inline void serial_out(int offset, int value)
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{
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iowriteb(PORT1 + offset, value);
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}
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int putch(uint8_t c)
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{
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while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
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;
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serial_out(UART_TX, c);
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return 1;
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}
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void init_console()
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{
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serial_out(1 , 0); /* Turn off interrupts */
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/* Communication Settings */
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serial_out(3 , 0x80); /* SET DLAB ON */
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serial_out(0 , 0x01); /* Set Baud rate - Divisor Latch Low Byte */
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/* 0x03 = 38,400 BPS */
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/* Default 0x01 = 115,200 BPS */
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/* 0x02 = 57,600 BPS */
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/* 0x06 = 19,200 BPS */
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/* 0x0C = 9,600 BPS */
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/* 0x18 = 4,800 BPS */
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/* 0x30 = 2,400 BPS */
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serial_out(1 , 0x00); /* Set Baud rate - Divisor Latch High Byte */
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serial_out(3 , 0x03); /* 8 Bits, No Parity, 1 Stop Bit */
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serial_out(2 , 0xC7); /* FIFO Control Register */
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serial_out(4 , 0x0B); /* Turn on DTR, RTS, and OUT2 */
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}
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