diff options
Diffstat (limited to 'include/grub/ns8250.h')
| -rw-r--r-- | include/grub/ns8250.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/include/grub/ns8250.h b/include/grub/ns8250.h new file mode 100644 index 0000000..7947ba9 --- /dev/null +++ b/include/grub/ns8250.h @@ -0,0 +1,80 @@ +/* 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 */ |