/* serial.h - serial device interface */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2000,2001,2002,2005 Free Software Foundation, Inc. * * 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; either version 2 of the License, or * (at your option) any later version. * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef GRUB_SERIAL_MACHINE_HEADER #define GRUB_SERIAL_MACHINE_HEADER 1 /* Macros. */ /* The offsets of UART registers. */ #define UART_TX 0 #define UART_RX 0 #define UART_DLL 0 #define UART_IER 1 #define UART_DLH 1 #define UART_IIR 2 #define UART_FCR 2 #define UART_LCR 3 #define UART_MCR 4 #define UART_LSR 5 #define UART_MSR 6 #define UART_SR 7 /* For LSR bits. */ #define UART_DATA_READY 0x01 #define UART_EMPTY_TRANSMITTER 0x20 /* The type of parity. */ #define UART_NO_PARITY 0x00 #define UART_ODD_PARITY 0x08 #define UART_EVEN_PARITY 0x18 /* The type of word length. */ #define UART_5BITS_WORD 0x00 #define UART_6BITS_WORD 0x01 #define UART_7BITS_WORD 0x02 #define UART_8BITS_WORD 0x03 /* The type of the length of stop bit. */ #define UART_1_STOP_BIT 0x00 #define UART_2_STOP_BITS 0x04 /* the switch of DLAB. */ #define UART_DLAB 0x80 /* Enable the FIFO. */ #define UART_ENABLE_FIFO 0xC7 /* Turn on DTR, RTS, and OUT2. */ #define UART_ENABLE_MODEM 0x0B #endif /* ! GRUB_SERIAL_MACHINE_HEADER */