1/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
2/*
3 * include/linux/serial.h
4 *
5 * Copyright (C) 1992 by Theodore Ts'o.
6 *
7 * Redistribution of this file is permitted under the terms of the GNU
8 * Public License (GPL)
9 */
10
11#ifndef _LINUX_SERIAL_H
12#define _LINUX_SERIAL_H
13
14#include <linux/types.h>
15
16#include <linux/tty_flags.h>
17
18
19struct serial_struct {
20 int type;
21 int line;
22 unsigned int port;
23 int irq;
24 int flags;
25 int xmit_fifo_size;
26 int custom_divisor;
27 int baud_base;
28 unsigned short close_delay;
29 char io_type;
30 char reserved_char[1];
31 int hub6;
32 unsigned short closing_wait; /* time to wait before closing */
33 unsigned short closing_wait2; /* no longer used... */
34 unsigned char *iomem_base;
35 unsigned short iomem_reg_shift;
36 unsigned int port_high;
37 unsigned long iomap_base; /* cookie passed into ioremap */
38};
39
40/*
41 * For the close wait times, 0 means wait forever for serial port to
42 * flush its output. 65535 means don't wait at all.
43 */
44#define ASYNC_CLOSING_WAIT_INF 0
45#define ASYNC_CLOSING_WAIT_NONE 65535
46
47/*
48 * These are the supported serial types.
49 */
50#define PORT_UNKNOWN 0
51#define PORT_8250 1
52#define PORT_16450 2
53#define PORT_16550 3
54#define PORT_16550A 4
55#define PORT_CIRRUS 5
56#define PORT_16650 6
57#define PORT_16650V2 7
58#define PORT_16750 8
59#define PORT_STARTECH 9
60#define PORT_16C950 10 /* Oxford Semiconductor */
61#define PORT_16654 11
62#define PORT_16850 12
63#define PORT_RSA 13 /* RSA-DV II/S card */
64#define PORT_MAX 13
65
66#define SERIAL_IO_PORT 0
67#define SERIAL_IO_HUB6 1
68#define SERIAL_IO_MEM 2
69#define SERIAL_IO_MEM32 3
70#define SERIAL_IO_AU 4
71#define SERIAL_IO_TSI 5
72#define SERIAL_IO_MEM32BE 6
73#define SERIAL_IO_MEM16 7
74
75#define UART_CLEAR_FIFO 0x01
76#define UART_USE_FIFO 0x02
77#define UART_STARTECH 0x04
78#define UART_NATSEMI 0x08
79
80
81/*
82 * Multiport serial configuration structure --- external structure
83 */
84struct serial_multiport_struct {
85 int irq;
86 int port1;
87 unsigned char mask1, match1;
88 int port2;
89 unsigned char mask2, match2;
90 int port3;
91 unsigned char mask3, match3;
92 int port4;
93 unsigned char mask4, match4;
94 int port_monitor;
95 int reserved[32];
96};
97
98/*
99 * Serial input interrupt line counters -- external structure
100 * Four lines can interrupt: CTS, DSR, RI, DCD
101 */
102struct serial_icounter_struct {
103 int cts, dsr, rng, dcd;
104 int rx, tx;
105 int frame, overrun, parity, brk;
106 int buf_overrun;
107 int reserved[9];
108};
109
110/*
111 * Serial interface for controlling RS485 settings on chips with suitable
112 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
113 * platform. The set function returns the new state, with any unsupported bits
114 * reverted appropriately.
115 */
116
117struct serial_rs485 {
118 __u32 flags; /* RS485 feature flags */
119#define SER_RS485_ENABLED (1 << 0) /* If enabled */
120#define SER_RS485_RTS_ON_SEND (1 << 1) /* Logical level for
121 RTS pin when
122 sending */
123#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for
124 RTS pin after sent*/
125#define SER_RS485_RX_DURING_TX (1 << 4)
126#define SER_RS485_TERMINATE_BUS (1 << 5) /* Enable bus
127 termination
128 (if supported) */
129 __u32 delay_rts_before_send; /* Delay before send (milliseconds) */
130 __u32 delay_rts_after_send; /* Delay after send (milliseconds) */
131 __u32 padding[5]; /* Memory is cheap, new structs
132 are a royal PITA .. */
133};
134
135/*
136 * Serial interface for controlling ISO7816 settings on chips with suitable
137 * support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by
138 * your platform.
139 */
140struct serial_iso7816 {
141 __u32 flags; /* ISO7816 feature flags */
142#define SER_ISO7816_ENABLED (1 << 0)
143#define SER_ISO7816_T_PARAM (0x0f << 4)
144#define SER_ISO7816_T(t) (((t) & 0x0f) << 4)
145 __u32 tg;
146 __u32 sc_fi;
147 __u32 sc_di;
148 __u32 clk;
149 __u32 reserved[5];
150};
151
152#endif /* _LINUX_SERIAL_H */
153

source code of include/linux/serial.h