serial.h revision 12e1f28cce28271eb109a5bae818a804f0c3bb27 
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 _UAPI_LINUX_SERIAL_H
11#define _UAPI_LINUX_SERIAL_H
12
13#include <linux/types.h>
14
15#include <linux/tty_flags.h>
16
17
18struct serial_struct {
19	int	type;
20	int	line;
21	unsigned int	port;
22	int	irq;
23	int	flags;
24	int	xmit_fifo_size;
25	int	custom_divisor;
26	int	baud_base;
27	unsigned short	close_delay;
28	char	io_type;
29	char	reserved_char[1];
30	int	hub6;
31	unsigned short	closing_wait; /* time to wait before closing */
32	unsigned short	closing_wait2; /* no longer used... */
33	unsigned char	*iomem_base;
34	unsigned short	iomem_reg_shift;
35	unsigned int	port_high;
36	unsigned long	iomap_base;	/* cookie passed into ioremap */
37};
38
39/*
40 * For the close wait times, 0 means wait forever for serial port to
41 * flush its output.  65535 means don't wait at all.
42 */
43#define ASYNC_CLOSING_WAIT_INF	0
44#define ASYNC_CLOSING_WAIT_NONE	65535
45
46/*
47 * These are the supported serial types.
48 */
49#define PORT_UNKNOWN	0
50#define PORT_8250	1
51#define PORT_16450	2
52#define PORT_16550	3
53#define PORT_16550A	4
54#define PORT_CIRRUS     5	/* usurped by cyclades.c */
55#define PORT_16650	6
56#define PORT_16650V2	7
57#define PORT_16750	8
58#define PORT_STARTECH	9	/* usurped by cyclades.c */
59#define PORT_16C950	10	/* Oxford Semiconductor */
60#define PORT_16654	11
61#define PORT_16850	12
62#define PORT_RSA	13	/* RSA-DV II/S card */
63#define PORT_MAX	13
64
65#define SERIAL_IO_PORT	0
66#define SERIAL_IO_HUB6	1
67#define SERIAL_IO_MEM	2
68#define SERIAL_IO_MEM32	  3
69#define SERIAL_IO_AU	  4
70#define SERIAL_IO_TSI	  5
71#define SERIAL_IO_MEM32BE 6
72
73#define UART_CLEAR_FIFO		0x01
74#define UART_USE_FIFO		0x02
75#define UART_STARTECH		0x04
76#define UART_NATSEMI		0x08
77
78
79/*
80 * Multiport serial configuration structure --- external structure
81 */
82struct serial_multiport_struct {
83	int		irq;
84	int		port1;
85	unsigned char	mask1, match1;
86	int		port2;
87	unsigned char	mask2, match2;
88	int		port3;
89	unsigned char	mask3, match3;
90	int		port4;
91	unsigned char	mask4, match4;
92	int		port_monitor;
93	int	reserved[32];
94};
95
96/*
97 * Serial input interrupt line counters -- external structure
98 * Four lines can interrupt: CTS, DSR, RI, DCD
99 */
100struct serial_icounter_struct {
101	int cts, dsr, rng, dcd;
102	int rx, tx;
103	int frame, overrun, parity, brk;
104	int buf_overrun;
105	int reserved[9];
106};
107
108/*
109 * Serial interface for controlling RS485 settings on chips with suitable
110 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
111 * platform. The set function returns the new state, with any unsupported bits
112 * reverted appropriately.
113 */
114
115struct serial_rs485 {
116	__u32	flags;			/* RS485 feature flags */
117#define SER_RS485_ENABLED		(1 << 0)	/* If enabled */
118#define SER_RS485_RTS_ON_SEND		(1 << 1)	/* Logical level for
119							   RTS pin when
120							   sending */
121#define SER_RS485_RTS_AFTER_SEND	(1 << 2)	/* Logical level for
122							   RTS pin after sent*/
123#define SER_RS485_RX_DURING_TX		(1 << 4)
124	__u32	delay_rts_before_send;	/* Delay before send (milliseconds) */
125	__u32	delay_rts_after_send;	/* Delay after send (milliseconds) */
126	__u32	padding[5];		/* Memory is cheap, new structs
127					   are a royal PITA .. */
128};
129
130#endif /* _UAPI_LINUX_SERIAL_H */
131