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#include <linux/types.h>
14
15#ifdef __KERNEL__
16#include <asm/page.h>
17
18/*
19 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
20 */
21
22struct async_icount {
23 __u32 cts, dsr, rng, dcd, tx, rx;
24 __u32 frame, parity, overrun, brk;
25 __u32 buf_overrun;
26};
27
28/*
29 * The size of the serial xmit buffer is 1 page, or 4096 bytes
30 */
31#define SERIAL_XMIT_SIZE PAGE_SIZE
32
33#endif
34
35struct serial_struct {
36 int type;
37 int line;
38 unsigned int port;
39 int irq;
40 int flags;
41 int xmit_fifo_size;
42 int custom_divisor;
43 int baud_base;
44 unsigned short close_delay;
45 char io_type;
46 char reserved_char[1];
47 int hub6;
48 unsigned short closing_wait; /* time to wait before closing */
49 unsigned short closing_wait2; /* no longer used... */
50 unsigned char *iomem_base;
51 unsigned short iomem_reg_shift;
52 unsigned int port_high;
53 unsigned long iomap_base; /* cookie passed into ioremap */
54};
55
56/*
57 * For the close wait times, 0 means wait forever for serial port to
58 * flush its output. 65535 means don't wait at all.
59 */
60#define ASYNC_CLOSING_WAIT_INF 0
61#define ASYNC_CLOSING_WAIT_NONE 65535
62
63/*
64 * These are the supported serial types.
65 */
66#define PORT_UNKNOWN 0
67#define PORT_8250 1
68#define PORT_16450 2
69#define PORT_16550 3
70#define PORT_16550A 4
71#define PORT_CIRRUS 5 /* usurped by cyclades.c */
72#define PORT_16650 6
73#define PORT_16650V2 7
74#define PORT_16750 8
75#define PORT_STARTECH 9 /* usurped by cyclades.c */
76#define PORT_16C950 10 /* Oxford Semiconductor */
77#define PORT_16654 11
78#define PORT_16850 12
79#define PORT_RSA 13 /* RSA-DV II/S card */
80#define PORT_MAX 13
81
82#define SERIAL_IO_PORT 0
83#define SERIAL_IO_HUB6 1
84#define SERIAL_IO_MEM 2
85
86struct serial_uart_config {
87 char *name;
88 int dfl_xmit_fifo_size;
89 int flags;
90};
91
92#define UART_CLEAR_FIFO 0x01
93#define UART_USE_FIFO 0x02
94#define UART_STARTECH 0x04
95#define UART_NATSEMI 0x08
96
97/*
98 * Definitions for async_struct (and serial_struct) flags field
99 */
100#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
101 on the callout port */
102#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
103#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */
104#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
105
106#define ASYNC_SPD_MASK 0x1030
107#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
108
109#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
110#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */
111
112#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
113#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
114#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
115#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
116#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
117
118#define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */
119
120#define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */
121#define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */
122
123#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
124
125#define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety
126 * checks. Note: can be dangerous! */
127
128#define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */
129
130#define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */
131#define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged
132 * users can set or reset */
133
134/* Internal flags used only by kernel/chr_drv/serial.c */
135#define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */
136#define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
137#define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
138#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */
139#define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */
140#define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */
141#define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards
142 --- no longer used */
143#define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */
144
145#define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */
146#define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */
147
148/*
149 * Multiport serial configuration structure --- external structure
150 */
151struct serial_multiport_struct {
152 int irq;
153 int port1;
154 unsigned char mask1, match1;
155 int port2;
156 unsigned char mask2, match2;
157 int port3;
158 unsigned char mask3, match3;
159 int port4;
160 unsigned char mask4, match4;
161 int port_monitor;
162 int reserved[32];
163};
164
165/*
166 * Serial input interrupt line counters -- external structure
167 * Four lines can interrupt: CTS, DSR, RI, DCD
168 */
169struct serial_icounter_struct {
170 int cts, dsr, rng, dcd;
171 int rx, tx;
172 int frame, overrun, parity, brk;
173 int buf_overrun;
174 int reserved[9];
175};
176
177/*
178 * Serial interface for controlling RS485 settings on chips with suitable
179 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
180 * platform. The set function returns the new state, with any unsupported bits
181 * reverted appropriately.
182 */
183
184struct serial_rs485 {
185 __u32 flags; /* RS485 feature flags */
186#define SER_RS485_ENABLED (1 << 0)
187#define SER_RS485_RTS_ON_SEND (1 << 1)
188#define SER_RS485_RTS_AFTER_SEND (1 << 2)
189 __u32 delay_rts_before_send; /* Milliseconds */
190 __u32 padding[6]; /* Memory is cheap, new structs
191 are a royal PITA .. */
192};
193
194#ifdef __KERNEL__
195#include <linux/compiler.h>
196
197#endif /* __KERNEL__ */
198#endif /* _LINUX_SERIAL_H */