linux-headers (unknown)
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
19 struct 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 */
84 struct 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 */
102 struct 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 * struct serial_rs485 - serial interface for controlling RS485 settings.
112 * @flags: RS485 feature flags.
113 * @delay_rts_before_send: Delay before send (milliseconds).
114 * @delay_rts_after_send: Delay after send (milliseconds).
115 * @addr_recv: Receive filter for RS485 addressing mode
116 * (used only when %SER_RS485_ADDR_RECV is set).
117 * @addr_dest: Destination address for RS485 addressing mode
118 * (used only when %SER_RS485_ADDR_DEST is set).
119 * @padding0: Padding (set to zero).
120 * @padding1: Padding (set to zero).
121 * @padding: Deprecated, use @padding0 and @padding1 instead.
122 * Do not use with @addr_recv and @addr_dest (due to
123 * overlap).
124 *
125 * Serial interface for controlling RS485 settings on chips with suitable
126 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
127 * platform. The set function returns the new state, with any unsupported bits
128 * reverted appropriately.
129 *
130 * The flag bits are:
131 *
132 * * %SER_RS485_ENABLED - RS485 enabled.
133 * * %SER_RS485_RTS_ON_SEND - Logical level for RTS pin when sending.
134 * * %SER_RS485_RTS_AFTER_SEND - Logical level for RTS pin after sent.
135 * * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line.
136 * * %SER_RS485_TERMINATE_BUS - Enable bus termination (if supported).
137 * * %SER_RS485_ADDRB - Enable RS485 addressing mode.
138 * * %SER_RS485_ADDR_RECV - Receive address filter (enables @addr_recv). Requires %SER_RS485_ADDRB.
139 * * %SER_RS485_ADDR_DEST - Destination address (enables @addr_dest). Requires %SER_RS485_ADDRB.
140 */
141 struct serial_rs485 {
142 __u32 flags;
143 #define SER_RS485_ENABLED (1 << 0)
144 #define SER_RS485_RTS_ON_SEND (1 << 1)
145 #define SER_RS485_RTS_AFTER_SEND (1 << 2)
146 #define SER_RS485_RX_DURING_TX (1 << 4)
147 #define SER_RS485_TERMINATE_BUS (1 << 5)
148 #define SER_RS485_ADDRB (1 << 6)
149 #define SER_RS485_ADDR_RECV (1 << 7)
150 #define SER_RS485_ADDR_DEST (1 << 8)
151
152 __u32 delay_rts_before_send;
153 __u32 delay_rts_after_send;
154
155 /* The fields below are defined by flags */
156 union {
157 __u32 padding[5]; /* Memory is cheap, new structs are a pain */
158
159 struct {
160 __u8 addr_recv;
161 __u8 addr_dest;
162 __u8 padding0[2];
163 __u32 padding1[4];
164 };
165 };
166 };
167
168 /*
169 * Serial interface for controlling ISO7816 settings on chips with suitable
170 * support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by
171 * your platform.
172 */
173 struct serial_iso7816 {
174 __u32 flags; /* ISO7816 feature flags */
175 #define SER_ISO7816_ENABLED (1 << 0)
176 #define SER_ISO7816_T_PARAM (0x0f << 4)
177 #define SER_ISO7816_T(t) (((t) & 0x0f) << 4)
178 __u32 tg;
179 __u32 sc_fi;
180 __u32 sc_di;
181 __u32 clk;
182 __u32 reserved[5];
183 };
184
185 #endif /* _LINUX_SERIAL_H */
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