1/*
2 *  linux/drivers/char/8250.h
3 *
4 *  Driver for 8250/16550-type serial ports
5 *
6 *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
7 *
8 *  Copyright (C) 2001 Russell King.
9 *
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.
14 *
15 *  $Id: 8250.h,v 1.1.1.1 2007/08/03 18:53:00 Exp $
16 */
17
18#include <linux/serial_8250.h>
19
20struct old_serial_port {
21	unsigned int uart;
22	unsigned int baud_base;
23	unsigned int port;
24	unsigned int irq;
25	unsigned int flags;
26	unsigned char hub6;
27	unsigned char io_type;
28	unsigned char *iomem_base;
29	unsigned short iomem_reg_shift;
30};
31
32/*
33 * This replaces serial_uart_config in include/linux/serial.h
34 */
35struct serial8250_config {
36	const char	*name;
37	unsigned short	fifo_size;
38	unsigned short	tx_loadsz;
39	unsigned char	fcr;
40	unsigned int	flags;
41};
42
43#define UART_CAP_FIFO	(1 << 8)	/* UART has FIFO */
44#define UART_CAP_EFR	(1 << 9)	/* UART has EFR */
45#define UART_CAP_SLEEP	(1 << 10)	/* UART has IER sleep */
46#define UART_CAP_AFE	(1 << 11)	/* MCR-based hw flow control */
47#define UART_CAP_UUE	(1 << 12)	/* UART needs IER bit 6 set (Xscale) */
48
49#define UART_BUG_QUOT	(1 << 0)	/* UART has buggy quot LSB */
50#define UART_BUG_TXEN	(1 << 1)	/* UART has buggy TX IIR status */
51#define UART_BUG_NOMSR	(1 << 2)	/* UART has buggy MSR status bits (Au1x00) */
52
53#define PROBE_RSA	(1 << 0)
54#define PROBE_ANY	(~0)
55
56#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
57
58#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
59#define SERIAL8250_SHARE_IRQS 1
60#else
61#define SERIAL8250_SHARE_IRQS 0
62#endif
63
64#if defined(__alpha__) && !defined(CONFIG_PCI)
65/*
66 * Digital did something really horribly wrong with the OUT1 and OUT2
67 * lines on at least some ALPHA's.  The failure mode is that if either
68 * is cleared, the machine locks up with endless interrupts.
69 */
70#define ALPHA_KLUDGE_MCR  (UART_MCR_OUT2 | UART_MCR_OUT1)
71#elif defined(CONFIG_SBC8560)
72/*
73 * WindRiver did something similarly broken on their SBC8560 board. The
74 * UART tristates its IRQ output while OUT2 is clear, but they pulled
75 * the interrupt line _up_ instead of down, so if we register the IRQ
76 * while the UART is in that state, we die in an IRQ storm. */
77#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
78#else
79#define ALPHA_KLUDGE_MCR 0
80#endif
81