[grub2.git] / include / grub / i386 / pc / serial.h

/* 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_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 */
Commit	Line	Data
47d2d65e	1	/* serial.h - serial device interface */
	2	/*
	3	* GRUB -- GRand Unified Bootloader
5a79f472	4	* Copyright (C) 2000,2001,2002,2005,2007 Free Software Foundation, Inc.
47d2d65e	5	*
5a79f472	6	* GRUB is free software: you can redistribute it and/or modify
47d2d65e	7	* it under the terms of the GNU General Public License as published by
5a79f472	8	* the Free Software Foundation, either version 3 of the License, or
47d2d65e	9	* (at your option) any later version.
47d2d65e	10	*
5a79f472	11	* GRUB is distributed in the hope that it will be useful,
47d2d65e	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
5a79f472	17	* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
47d2d65e	18	*/
	19
	20	#ifndef GRUB_SERIAL_MACHINE_HEADER
	21	#define GRUB_SERIAL_MACHINE_HEADER 1
	22
	23	/* Macros. */
	24
	25	/* The offsets of UART registers. */
	26	#define UART_TX 0
	27	#define UART_RX 0
	28	#define UART_DLL 0
	29	#define UART_IER 1
	30	#define UART_DLH 1
	31	#define UART_IIR 2
	32	#define UART_FCR 2
	33	#define UART_LCR 3
	34	#define UART_MCR 4
	35	#define UART_LSR 5
	36	#define UART_MSR 6
	37	#define UART_SR 7
	38
	39	/* For LSR bits. */
	40	#define UART_DATA_READY 0x01
	41	#define UART_EMPTY_TRANSMITTER 0x20
	42
	43	/* The type of parity. */
	44	#define UART_NO_PARITY 0x00
	45	#define UART_ODD_PARITY 0x08
	46	#define UART_EVEN_PARITY 0x18
	47
	48	/* The type of word length. */
	49	#define UART_5BITS_WORD 0x00
	50	#define UART_6BITS_WORD 0x01
	51	#define UART_7BITS_WORD 0x02
	52	#define UART_8BITS_WORD 0x03
	53
	54	/* The type of the length of stop bit. */
	55	#define UART_1_STOP_BIT 0x00
	56	#define UART_2_STOP_BITS 0x04
	57
	58	/* the switch of DLAB. */
	59	#define UART_DLAB 0x80
	60
	61	/* Enable the FIFO. */
	62	#define UART_ENABLE_FIFO 0xC7
	63
	64	/* Turn on DTR, RTS, and OUT2. */
	65	#define UART_ENABLE_MODEM 0x0B
	66
	67	#endif /* ! GRUB_SERIAL_MACHINE_HEADER */