mirror of
https://github.com/fail0verflow/switch-coreboot.git
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2e42b88a9a
Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@137 f3766cd6-281f-0410-b1cd-43a5c92072e9
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
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* serial.c -- uart init function
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*
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* Copyright (C) 2007 coresystems GmbH <stepan@coresystems.de>
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* Copyright (C) 2007 Ronald G. Minnich <rminnich@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*
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*/
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#include <arch/io.h>
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/* Base Address */
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#if defined(CONFIG_CONSOLE_SERIAL_COM1)
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#define TTYSx_BASE 0x3f8
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#elif defined(CONFIG_CONSOLE_SERIAL_COM2)
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#define TTYSx_BASE 0x2f8
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#else
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#define TTYSx_BASE 0x3f8
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#warning no serial port set
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#endif
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#if defined(CONFIG_CONSOLE_SERIAL_115200)
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#define TTYSx_BAUD 115200
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#elif defined(CONFIG_CONSOLE_SERIAL_57600)
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#define TTYSx_BAUD 57600
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#elif defined(CONFIG_CONSOLE_SERIAL_38400)
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#define TTYSx_BAUD 38400
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#elif defined(CONFIG_CONSOLE_SERIAL_19200)
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#define TTYSx_BAUD 19200
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#elif defined(CONFIG_CONSOLE_SERIAL_9600)
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#define TTYSx_BAUD 9600
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#else // default
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#define TTYSx_BAUD 115200
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#warning no serial speed set
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#endif
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#if ((115200%TTYSx_BAUD) != 0)
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#error Bad ttys0 baud rate
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#endif
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#define TTYSx_DIV (115200/TTYSx_BAUD)
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/* Line Control Settings */
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#ifndef TTYSx_LCS
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/* Set 8bit, 1 stop bit, no parity */
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#define TTYSx_LCS 0x3
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#endif
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#define UART_LCS TTYSx_LCS
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void uart8250_init(unsigned base_port, unsigned divisor, unsigned lcs);
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void uart_init(void)
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{
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unsigned ttysx_div;
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#if 0
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unsigned ttysx_index;
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static const unsigned char divisor[] = { 1,2,3,6,12,24,48,96 };
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// read CMOS settings?
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ttysx_index = read_option(CMOS_VSTART_baud_rate, CMOS_VLEN_baud_rate, 0);
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ttysx_index &= 7;
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ttysx_div = divisor[ttysx_index];
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#else
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ttysx_div = TTYSx_DIV;
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#endif
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uart8250_init(TTYSx_BASE, ttysx_div, UART_LCS);
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}
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