1 /* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
3 * include/linux/serial.h
5 * Copyright (C) 1992 by Theodore Ts'o.
7 * Redistribution of this file is permitted under the terms of the GNU
11 #ifndef _UAPI_LINUX_SERIAL_H
12 #define _UAPI_LINUX_SERIAL_H
14 #include <linux/const.h>
15 #include <linux/types.h>
17 #include <linux/tty_flags.h>
20 struct serial_struct {
29 unsigned short close_delay;
31 char reserved_char[1];
33 unsigned short closing_wait; /* time to wait before closing */
34 unsigned short closing_wait2; /* no longer used... */
35 unsigned char *iomem_base;
36 unsigned short iomem_reg_shift;
37 unsigned int port_high;
38 unsigned long iomap_base; /* cookie passed into ioremap */
42 * For the close wait times, 0 means wait forever for serial port to
43 * flush its output. 65535 means don't wait at all.
45 #define ASYNC_CLOSING_WAIT_INF 0
46 #define ASYNC_CLOSING_WAIT_NONE 65535
49 * These are the supported serial types.
51 #define PORT_UNKNOWN 0
58 #define PORT_16650V2 7
60 #define PORT_STARTECH 9
61 #define PORT_16C950 10 /* Oxford Semiconductor */
64 #define PORT_RSA 13 /* RSA-DV II/S card */
67 #define SERIAL_IO_PORT 0
68 #define SERIAL_IO_HUB6 1
69 #define SERIAL_IO_MEM 2
70 #define SERIAL_IO_MEM32 3
71 #define SERIAL_IO_AU 4
72 #define SERIAL_IO_TSI 5
73 #define SERIAL_IO_MEM32BE 6
74 #define SERIAL_IO_MEM16 7
76 #define UART_CLEAR_FIFO 0x01
77 #define UART_USE_FIFO 0x02
78 #define UART_STARTECH 0x04
79 #define UART_NATSEMI 0x08
83 * Multiport serial configuration structure --- external structure
85 struct serial_multiport_struct {
88 unsigned char mask1, match1;
90 unsigned char mask2, match2;
92 unsigned char mask3, match3;
94 unsigned char mask4, match4;
100 * Serial input interrupt line counters -- external structure
101 * Four lines can interrupt: CTS, DSR, RI, DCD
103 struct serial_icounter_struct {
104 int cts, dsr, rng, dcd;
106 int frame, overrun, parity, brk;
112 * struct serial_rs485 - serial interface for controlling RS485 settings.
113 * @flags: RS485 feature flags.
114 * @delay_rts_before_send: Delay before send (milliseconds).
115 * @delay_rts_after_send: Delay after send (milliseconds).
116 * @addr_recv: Receive filter for RS485 addressing mode
117 * (used only when %SER_RS485_ADDR_RECV is set).
118 * @addr_dest: Destination address for RS485 addressing mode
119 * (used only when %SER_RS485_ADDR_DEST is set).
120 * @padding0: Padding (set to zero).
121 * @padding1: Padding (set to zero).
122 * @padding: Deprecated, use @padding0 and @padding1 instead.
123 * Do not use with @addr_recv and @addr_dest (due to
126 * Serial interface for controlling RS485 settings on chips with suitable
127 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
128 * platform. The set function returns the new state, with any unsupported bits
129 * reverted appropriately.
133 * * %SER_RS485_ENABLED - RS485 enabled.
134 * * %SER_RS485_RTS_ON_SEND - Logical level for RTS pin when sending.
135 * * %SER_RS485_RTS_AFTER_SEND - Logical level for RTS pin after sent.
136 * * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line.
137 * * %SER_RS485_TERMINATE_BUS - Enable bus termination (if supported).
138 * * %SER_RS485_ADDRB - Enable RS485 addressing mode.
139 * * %SER_RS485_ADDR_RECV - Receive address filter (enables @addr_recv). Requires %SER_RS485_ADDRB.
140 * * %SER_RS485_ADDR_DEST - Destination address (enables @addr_dest). Requires %SER_RS485_ADDRB.
141 * * %SER_RS485_MODE_RS422 - Enable RS422. Requires %SER_RS485_ENABLED.
143 struct serial_rs485 {
145 #define SER_RS485_ENABLED _BITUL(0)
146 #define SER_RS485_RTS_ON_SEND _BITUL(1)
147 #define SER_RS485_RTS_AFTER_SEND _BITUL(2)
148 /* Placeholder for bit 3: SER_RS485_RTS_BEFORE_SEND, which isn't used anymore */
149 #define SER_RS485_RX_DURING_TX _BITUL(4)
150 #define SER_RS485_TERMINATE_BUS _BITUL(5)
151 #define SER_RS485_ADDRB _BITUL(6)
152 #define SER_RS485_ADDR_RECV _BITUL(7)
153 #define SER_RS485_ADDR_DEST _BITUL(8)
154 #define SER_RS485_MODE_RS422 _BITUL(9)
156 __u32 delay_rts_before_send;
157 __u32 delay_rts_after_send;
159 /* The fields below are defined by flags */
161 __u32 padding[5]; /* Memory is cheap, new structs are a pain */
173 * Serial interface for controlling ISO7816 settings on chips with suitable
174 * support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by
177 struct serial_iso7816 {
178 __u32 flags; /* ISO7816 feature flags */
179 #define SER_ISO7816_ENABLED (1 << 0)
180 #define SER_ISO7816_T_PARAM (0x0f << 4)
181 #define SER_ISO7816_T(t) (((t) & 0x0f) << 4)
189 #endif /* _UAPI_LINUX_SERIAL_H */