diff options
Diffstat (limited to 'src/include/console/uart.h')
-rw-r--r-- | src/include/console/uart.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/include/console/uart.h b/src/include/console/uart.h new file mode 100644 index 0000000000..9b52a78c69 --- /dev/null +++ b/src/include/console/uart.h @@ -0,0 +1,49 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef CONSOLE_UART_H +#define CONSOLE_UART_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); + + +unsigned char uart_rx_byte(void); +void uart_tx_byte(unsigned char data); +void uart_tx_flush(void); +void uart_init(void); + +uint32_t uartmem_getbaseaddr(void); + +void oxford_init(void); + +#endif /* CONSOLE_UART_H */ |