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/* serial.h - serial device interface */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000,2001,2002,2005,2007 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_NS8250_HEADER
#define GRUB_NS8250_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_TRIGGER14 0xC7
/* Enable the FIFO. */
#define UART_ENABLE_FIFO_TRIGGER1 0x07
/* Turn on DTR, RTS, and OUT2. */
#define UART_ENABLE_DTRRTS 0x03
/* Turn on DTR, RTS, and OUT2. */
#define UART_ENABLE_OUT2 0x08
#ifndef ASM_FILE
#include <grub/cpu/io.h>
grub_port_t
grub_ns8250_hw_get_port (const unsigned int unit);
#endif
#endif /* ! GRUB_SERIAL_MACHINE_HEADER */
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