2 * include/linux/serial.h
4 * Copyright (C) 1992 by Theodore Ts'o.
6 * Redistribution of this file is permitted under the terms of the GNU
10 #ifndef _UAPI_LINUX_SERIAL_H
11 #define _UAPI_LINUX_SERIAL_H
13 #include <linux/types.h>
15 #include <linux/tty_flags.h>
18 struct serial_struct
{
27 unsigned short close_delay
;
29 char reserved_char
[1];
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 */
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.
43 #define ASYNC_CLOSING_WAIT_INF 0
44 #define ASYNC_CLOSING_WAIT_NONE 65535
47 * These are the supported serial types.
49 #define PORT_UNKNOWN 0
54 #define PORT_CIRRUS 5 /* usurped by cyclades.c */
56 #define PORT_16650V2 7
58 #define PORT_STARTECH 9 /* usurped by cyclades.c */
59 #define PORT_16C950 10 /* Oxford Semiconductor */
62 #define PORT_RSA 13 /* RSA-DV II/S card */
65 #define SERIAL_IO_PORT 0
66 #define SERIAL_IO_HUB6 1
67 #define SERIAL_IO_MEM 2
69 #define UART_CLEAR_FIFO 0x01
70 #define UART_USE_FIFO 0x02
71 #define UART_STARTECH 0x04
72 #define UART_NATSEMI 0x08
76 * Multiport serial configuration structure --- external structure
78 struct serial_multiport_struct
{
81 unsigned char mask1
, match1
;
83 unsigned char mask2
, match2
;
85 unsigned char mask3
, match3
;
87 unsigned char mask4
, match4
;
93 * Serial input interrupt line counters -- external structure
94 * Four lines can interrupt: CTS, DSR, RI, DCD
96 struct serial_icounter_struct
{
97 int cts
, dsr
, rng
, dcd
;
99 int frame
, overrun
, parity
, brk
;
105 * Serial interface for controlling RS485 settings on chips with suitable
106 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
107 * platform. The set function returns the new state, with any unsupported bits
108 * reverted appropriately.
111 struct serial_rs485
{
112 __u32 flags
; /* RS485 feature flags */
113 #define SER_RS485_ENABLED (1 << 0) /* If enabled */
114 #define SER_RS485_RTS_ON_SEND (1 << 1) /* Logical level for
117 #define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for
119 #define SER_RS485_RX_DURING_TX (1 << 4)
120 __u32 delay_rts_before_send
; /* Delay before send (milliseconds) */
121 __u32 delay_rts_after_send
; /* Delay after send (milliseconds) */
122 __u32 padding
[5]; /* Memory is cheap, new structs
123 are a royal PITA .. */
126 #endif /* _UAPI_LINUX_SERIAL_H */