235daa4bf6
The rationale is to allow the mainboard to override the default baudrate for instance by sampling GPIOs at boot. A new configuration option is available for mainboards to select this behaviour. It will then have to define the function get_uart_baudrate to return the computed baudrate. Change-Id: I970ee788bf90b9e1a8c6ccdc5eee8029d9af0ecc Signed-off-by: Julien Viard de Galbert <jviarddegalbert@online.net> Reviewed-on: https://review.coreboot.org/23713 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2013 Google Inc.
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* Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@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 or (at your option)
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* any later version.
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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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* Glue to UART code to enable serial console
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*/
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#include <types.h>
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#include <console/uart.h>
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#include <boot/coreboot_tables.h>
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#include "memmap.h"
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uintptr_t uart_platform_base(int idx)
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{
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/* UART blocks are mapped 0x400 bytes apart */
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if (idx < 8)
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return A1X_UART0_BASE + 0x400 * idx;
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else
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return 0;
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}
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/* FIXME: We assume clock is 24MHz, which may not be the case. */
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unsigned int uart_platform_refclk(void)
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{
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return 24000000;
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}
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#ifndef __PRE_RAM__
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void uart_fill_lb(void *data)
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{
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struct lb_serial serial;
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serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
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serial.baseaddr = uart_platform_base(CONFIG_UART_FOR_CONSOLE);
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serial.baud = get_uart_baudrate();
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serial.regwidth = 1;
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serial.input_hertz = uart_platform_refclk();
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serial.uart_pci_addr = 0;
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lb_add_serial(&serial, data);
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lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
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}
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#endif
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