| /* serial.h - serial device interface */ |
| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2000,2001,2002 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_HEADER |
| #define GRUB_SERIAL_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 |
| |
| |
| /* Function prototypes. */ |
| |
| /* Fetch a key. */ |
| int serial_hw_fetch (void); |
| |
| /* Put a character. */ |
| void serial_hw_put (int c); |
| |
| /* Insert a delay. */ |
| void serial_hw_delay (void); |
| |
| /* Return the port number for the UNITth serial device. */ |
| unsigned short serial_hw_get_port (int unit); |
| |
| /* Initialize a serial device. */ |
| int serial_hw_init (unsigned short port, unsigned int speed, |
| int word_len, int parity, int stop_bit_len); |
| |
| #ifdef GRUB_UTIL |
| /* Set the file name of a serial device (or a pty device). This is a |
| function specific to the grub shell. */ |
| void serial_set_device (const char *device); |
| #endif /* GRUB_UTIL */ |
| |
| #endif /* ! GRUB_SERIAL_HEADER */ |
