Line data Source code
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 :
16 : #include <linux/serial_8250.h>
17 :
18 : struct old_serial_port {
19 : unsigned int uart;
20 : unsigned int baud_base;
21 : unsigned int port;
22 : unsigned int irq;
23 : unsigned int flags;
24 : unsigned char hub6;
25 : unsigned char io_type;
26 : unsigned char *iomem_base;
27 : unsigned short iomem_reg_shift;
28 : unsigned long irqflags;
29 : };
30 1 :
31 : /*
32 : * This replaces serial_uart_config in include/linux/serial.h
33 : */
34 : struct serial8250_config {
35 : const char *name;
36 : unsigned short fifo_size;
37 : unsigned short tx_loadsz;
38 : unsigned char fcr;
39 : unsigned int flags;
40 : };
41 :
42 : #define UART_CAP_FIFO (1 << 8) /* UART has FIFO */
43 : #define UART_CAP_EFR (1 << 9) /* UART has EFR */
44 : #define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */
45 : #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */
46 : #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */
47 :
48 : #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
49 : #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */
50 : #define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */
51 : #define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
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
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