/* * This file is part of the coreboot project. * * Copyright (C) 2012 The ChromiumOS Authors. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #ifndef CONSOLE_UART_H #define CONSOLE_UART_H #include <rules.h> #include <stdint.h> /* Return the clock frequency UART uses as reference clock for * baudrate generator. */ unsigned int uart_platform_refclk(void); /* Return the baudrate determined from option_table, or when that is * not used, CONFIG_TTYS0_BAUD. */ unsigned int default_baudrate(void); /* Returns the divisor value for a given baudrate. * The formula to satisfy is: * refclk / divisor = baudrate * oversample */ unsigned int uart_baudrate_divisor(unsigned int baudrate, unsigned int refclk, unsigned int oversample); /* Returns the oversample divisor multiplied by any other divisors that act * on the input clock */ unsigned int uart_input_clock_divider(void); void uart_init(int idx); void uart_tx_byte(int idx, unsigned char data); void uart_tx_flush(int idx); unsigned char uart_rx_byte(int idx); uintptr_t uart_platform_base(int idx); #if !defined(__ROMCC__) static inline void *uart_platform_baseptr(int idx) { return (void *)uart_platform_base(idx); } void oxford_remap(unsigned int new_base); #define __CONSOLE_SERIAL_ENABLE__ CONFIG_CONSOLE_SERIAL && \ (ENV_BOOTBLOCK || ENV_ROMSTAGE || ENV_RAMSTAGE || ENV_VERSTAGE || \ (ENV_SMM && CONFIG_DEBUG_SMI)) #if __CONSOLE_SERIAL_ENABLE__ static inline void __uart_init(void) { uart_init(CONFIG_UART_FOR_CONSOLE); } static inline void __uart_tx_byte(u8 data) { uart_tx_byte(CONFIG_UART_FOR_CONSOLE, data); } static inline void __uart_tx_flush(void) { uart_tx_flush(CONFIG_UART_FOR_CONSOLE); } #else static inline void __uart_init(void) {} static inline void __uart_tx_byte(u8 data) {} static inline void __uart_tx_flush(void) {} #endif #if CONFIG_GDB_STUB && (ENV_ROMSTAGE || ENV_RAMSTAGE) #define CONFIG_UART_FOR_GDB CONFIG_UART_FOR_CONSOLE static inline void __gdb_hw_init(void) { uart_init(CONFIG_UART_FOR_GDB); } static inline void __gdb_tx_byte(u8 data) { uart_tx_byte(CONFIG_UART_FOR_GDB, data); } static inline void __gdb_tx_flush(void) { uart_tx_flush(CONFIG_UART_FOR_GDB); } static inline u8 __gdb_rx_byte(void) { return uart_rx_byte(CONFIG_UART_FOR_GDB); } #endif #endif /* __ROMCC__ */ #endif /* CONSOLE_UART_H */