3eabe6e9ec
Build the UART drivers for the postcar stage. TEST=Build and run on Galileo Gen2 Change-Id: I8bf51135ab7e62fa4bc3e8d45583f2feac56942f Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/15843 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
82 lines
2.7 KiB
C
82 lines
2.7 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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/* Return the baudrate determined from option_table, or when that is
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* not used, CONFIG_TTYS0_BAUD.
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*/
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unsigned int default_baudrate(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__ CONFIG_CONSOLE_SERIAL && \
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(ENV_BOOTBLOCK || ENV_ROMSTAGE || ENV_RAMSTAGE || ENV_VERSTAGE || \
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ENV_POSTCAR || (ENV_SMM && CONFIG_DEBUG_SMI))
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#if __CONSOLE_SERIAL_ENABLE__
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static inline void __uart_init(void) { uart_init(CONFIG_UART_FOR_CONSOLE); }
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static inline void __uart_tx_byte(u8 data) { uart_tx_byte(CONFIG_UART_FOR_CONSOLE, data); }
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static inline void __uart_tx_flush(void) { uart_tx_flush(CONFIG_UART_FOR_CONSOLE); }
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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 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) { uart_tx_byte(CONFIG_UART_FOR_GDB, data); }
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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) { return uart_rx_byte(CONFIG_UART_FOR_GDB); }
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#endif
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#endif /* __ROMCC__ */
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#endif /* CONSOLE_UART_H */
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