b29078e401
There have been discussions about removing this since it does not seem to be used much and only creates troubles for boards without defaults, not to mention that it was configurable on many boards that do not even feature uart. It is still possible to configure the baudrate through the Kconfig option. Change-Id: I71698d9b188eeac73670b18b757dff5fcea0df41 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19682 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.
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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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#ifndef CONSOLE_UART_H
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#define CONSOLE_UART_H
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#include <rules.h>
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#include <stdint.h>
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/* Return the clock frequency UART uses as reference clock for
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* baudrate generator. */
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unsigned int uart_platform_refclk(void);
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/* Returns the divisor value for a given baudrate.
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* The formula to satisfy is:
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* refclk / divisor = baudrate * oversample
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*/
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unsigned int uart_baudrate_divisor(unsigned int baudrate,
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unsigned int refclk, unsigned int oversample);
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/* Returns the oversample divisor multiplied by any other divisors that act
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* on the input clock
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*/
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unsigned int uart_input_clock_divider(void);
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void uart_init(int idx);
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void uart_tx_byte(int idx, unsigned char data);
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void uart_tx_flush(int idx);
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unsigned char uart_rx_byte(int idx);
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uintptr_t uart_platform_base(int idx);
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#if !defined(__ROMCC__)
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static inline void *uart_platform_baseptr(int idx)
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{
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return (void *)uart_platform_base(idx);
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}
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void oxford_remap(unsigned int new_base);
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#define __CONSOLE_SERIAL_ENABLE__ (IS_ENABLED(CONFIG_CONSOLE_SERIAL) && \
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(ENV_BOOTBLOCK || ENV_ROMSTAGE || ENV_RAMSTAGE || ENV_VERSTAGE || \
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ENV_POSTCAR || (ENV_SMM && IS_ENABLED(CONFIG_DEBUG_SMI))))
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#if __CONSOLE_SERIAL_ENABLE__
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static inline void __uart_init(void)
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{
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uart_init(CONFIG_UART_FOR_CONSOLE);
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}
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static inline void __uart_tx_byte(u8 data)
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{
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uart_tx_byte(CONFIG_UART_FOR_CONSOLE, data);
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}
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static inline void __uart_tx_flush(void)
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{
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uart_tx_flush(CONFIG_UART_FOR_CONSOLE);
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}
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#else
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static inline void __uart_init(void) {}
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static inline void __uart_tx_byte(u8 data) {}
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static inline void __uart_tx_flush(void) {}
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#endif
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#if IS_ENABLED(CONFIG_GDB_STUB) && (ENV_ROMSTAGE || ENV_RAMSTAGE)
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#define CONFIG_UART_FOR_GDB CONFIG_UART_FOR_CONSOLE
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static inline void __gdb_hw_init(void) { uart_init(CONFIG_UART_FOR_GDB); }
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static inline void __gdb_tx_byte(u8 data)
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{
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uart_tx_byte(CONFIG_UART_FOR_GDB, data);
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}
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static inline void __gdb_tx_flush(void) { uart_tx_flush(CONFIG_UART_FOR_GDB); }
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static inline u8 __gdb_rx_byte(void)
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{
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return uart_rx_byte(CONFIG_UART_FOR_GDB);
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}
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#endif
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#endif /* __ROMCC__ */
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#endif /* CONSOLE_UART_H */
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