2 * linux/drivers/char/8250.h
4 * Driver for 8250/16550-type serial ports
6 * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
8 * Copyright (C) 2001 Russell King.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * $Id: 8250.h,v 1.8 2002/07/21 21:32:30 rmk Exp $
18 #include <linux/config.h>
20 int serial8250_register_port(struct uart_port *);
21 void serial8250_unregister_port(int line);
22 void serial8250_suspend_port(int line);
23 void serial8250_resume_port(int line);
25 struct old_serial_port {
27 unsigned int baud_base;
32 unsigned char io_type;
33 unsigned char *iomem_base;
34 unsigned short iomem_reg_shift;
38 * This replaces serial_uart_config in include/linux/serial.h
40 struct serial8250_config {
42 unsigned short fifo_size;
43 unsigned short tx_loadsz;
48 #define UART_CAP_FIFO (1 << 8) /* UART has FIFO */
49 #define UART_CAP_EFR (1 << 9) /* UART has EFR */
50 #define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */
51 #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */
52 #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */
54 #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
55 #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */
57 #if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486))
58 #define _INLINE_ inline
63 #define PROBE_RSA (1 << 0)
64 #define PROBE_ANY (~0)
66 #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
68 #ifdef CONFIG_SERIAL_8250_SHARE_IRQ
69 #define SERIAL8250_SHARE_IRQS 1
71 #define SERIAL8250_SHARE_IRQS 0
74 #if defined(__alpha__) && !defined(CONFIG_PCI)
76 * Digital did something really horribly wrong with the OUT1 and OUT2
77 * lines on at least some ALPHA's. The failure mode is that if either
78 * is cleared, the machine locks up with endless interrupts.
80 #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
81 #elif defined(CONFIG_SBC8560)
83 * WindRiver did something similarly broken on their SBC8560 board. The
84 * UART tristates its IRQ output while OUT2 is clear, but they pulled
85 * the interrupt line _up_ instead of down, so if we register the IRQ
86 * while the UART is in that state, we die in an IRQ storm. */
87 #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
89 #define ALPHA_KLUDGE_MCR 0