Linux kernel mirror (for testing)
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1/*
2 * include/linux/serial.h
3 *
4 * Copyright (C) 1992 by Theodore Ts'o.
5 *
6 * Redistribution of this file is permitted under the terms of the GNU
7 * Public License (GPL)
8 */
9
10#ifndef _LINUX_SERIAL_H
11#define _LINUX_SERIAL_H
12
13#ifdef __KERNEL__
14#include <linux/types.h>
15#include <asm/page.h>
16
17/*
18 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
19 */
20
21struct async_icount {
22 __u32 cts, dsr, rng, dcd, tx, rx;
23 __u32 frame, parity, overrun, brk;
24 __u32 buf_overrun;
25};
26
27/*
28 * The size of the serial xmit buffer is 1 page, or 4096 bytes
29 */
30#define SERIAL_XMIT_SIZE PAGE_SIZE
31
32#endif
33
34struct serial_struct {
35 int type;
36 int line;
37 unsigned int port;
38 int irq;
39 int flags;
40 int xmit_fifo_size;
41 int custom_divisor;
42 int baud_base;
43 unsigned short close_delay;
44 char io_type;
45 char reserved_char[1];
46 int hub6;
47 unsigned short closing_wait; /* time to wait before closing */
48 unsigned short closing_wait2; /* no longer used... */
49 unsigned char *iomem_base;
50 unsigned short iomem_reg_shift;
51 unsigned int port_high;
52 unsigned long iomap_base; /* cookie passed into ioremap */
53};
54
55/*
56 * For the close wait times, 0 means wait forever for serial port to
57 * flush its output. 65535 means don't wait at all.
58 */
59#define ASYNC_CLOSING_WAIT_INF 0
60#define ASYNC_CLOSING_WAIT_NONE 65535
61
62/*
63 * These are the supported serial types.
64 */
65#define PORT_UNKNOWN 0
66#define PORT_8250 1
67#define PORT_16450 2
68#define PORT_16550 3
69#define PORT_16550A 4
70#define PORT_CIRRUS 5 /* usurped by cyclades.c */
71#define PORT_16650 6
72#define PORT_16650V2 7
73#define PORT_16750 8
74#define PORT_STARTECH 9 /* usurped by cyclades.c */
75#define PORT_16C950 10 /* Oxford Semiconductor */
76#define PORT_16654 11
77#define PORT_16850 12
78#define PORT_RSA 13 /* RSA-DV II/S card */
79#define PORT_MAX 13
80
81#define SERIAL_IO_PORT 0
82#define SERIAL_IO_HUB6 1
83#define SERIAL_IO_MEM 2
84
85struct serial_uart_config {
86 char *name;
87 int dfl_xmit_fifo_size;
88 int flags;
89};
90
91#define UART_CLEAR_FIFO 0x01
92#define UART_USE_FIFO 0x02
93#define UART_STARTECH 0x04
94#define UART_NATSEMI 0x08
95
96/*
97 * Definitions for async_struct (and serial_struct) flags field
98 */
99#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
100 on the callout port */
101#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
102#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */
103#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
104
105#define ASYNC_SPD_MASK 0x1030
106#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
107
108#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
109#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */
110
111#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
112#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
113#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
114#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
115#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
116
117#define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */
118
119#define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */
120#define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */
121
122#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
123
124#define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety
125 * checks. Note: can be dangerous! */
126
127#define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */
128
129#define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */
130#define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged
131 * users can set or reset */
132
133/* Internal flags used only by kernel/chr_drv/serial.c */
134#define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */
135#define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
136#define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
137#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */
138#define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */
139#define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */
140#define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards
141 --- no longer used */
142#define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */
143
144#define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */
145#define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */
146
147/*
148 * Multiport serial configuration structure --- external structure
149 */
150struct serial_multiport_struct {
151 int irq;
152 int port1;
153 unsigned char mask1, match1;
154 int port2;
155 unsigned char mask2, match2;
156 int port3;
157 unsigned char mask3, match3;
158 int port4;
159 unsigned char mask4, match4;
160 int port_monitor;
161 int reserved[32];
162};
163
164/*
165 * Serial input interrupt line counters -- external structure
166 * Four lines can interrupt: CTS, DSR, RI, DCD
167 */
168struct serial_icounter_struct {
169 int cts, dsr, rng, dcd;
170 int rx, tx;
171 int frame, overrun, parity, brk;
172 int buf_overrun;
173 int reserved[9];
174};
175
176
177#ifdef __KERNEL__
178#include <linux/compiler.h>
179
180#endif /* __KERNEL__ */
181#endif /* _LINUX_SERIAL_H */