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
68 #define SERIAL_IO_MEM32 3
69 #define SERIAL_IO_AU 4
70 #define SERIAL_IO_TSI 5
71 #define SERIAL_IO_MEM32BE 6
73 #define UART_CLEAR_FIFO 0x01
74 #define UART_USE_FIFO 0x02
75 #define UART_STARTECH 0x04
76 #define UART_NATSEMI 0x08
80 * Multiport serial configuration structure --- external structure
82 struct serial_multiport_struct {
85 unsigned char mask1, match1;
87 unsigned char mask2, match2;
89 unsigned char mask3, match3;
91 unsigned char mask4, match4;
97 * Serial input interrupt line counters -- external structure
98 * Four lines can interrupt: CTS, DSR, RI, DCD
100 struct serial_icounter_struct {
101 int cts, dsr, rng, dcd;
103 int frame, overrun, parity, brk;
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.
115 struct 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
121 #define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for
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 .. */
130 #endif /* _UAPI_LINUX_SERIAL_H */