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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 _UAPI_LINUX_SERIAL_H
12  #define _UAPI_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	/* usurped by cyclades.c */
56  #define PORT_16650	6
57  #define PORT_16650V2	7
58  #define PORT_16750	8
59  #define PORT_STARTECH	9	/* usurped by cyclades.c */
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   * 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  
117  struct 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   */
140  struct 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 /* _UAPI_LINUX_SERIAL_H */
153