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/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
/*
* include/linux/serial.h
*
* Copyright (C) 1992 by Theodore Ts'o.
*
* Redistribution of this file is permitted under the terms of the GNU
* Public License (GPL)
*/
#ifndef _LINUX_SERIAL_H
#define _LINUX_SERIAL_H
#include <linux/const.h>
#include <linux/types.h>
#include <linux/tty_flags.h>
struct serial_struct {
int type;
int line;
unsigned int port;
int irq;
int flags;
int xmit_fifo_size;
int custom_divisor;
int baud_base;
unsigned short close_delay;
char io_type;
char reserved_char[1];
int hub6;
unsigned short closing_wait; /* time to wait before closing */
unsigned short closing_wait2; /* no longer used... */
unsigned char *iomem_base;
unsigned short iomem_reg_shift;
unsigned int port_high;
unsigned long iomap_base; /* cookie passed into ioremap */
};
/*
* For the close wait times, 0 means wait forever for serial port to
* flush its output. 65535 means don't wait at all.
*/
#define ASYNC_CLOSING_WAIT_INF 0
#define ASYNC_CLOSING_WAIT_NONE 65535
/*
* These are the supported serial types.
*/
#define PORT_UNKNOWN 0
#define PORT_8250 1
#define PORT_16450 2
#define PORT_16550 3
#define PORT_16550A 4
#define PORT_CIRRUS 5
#define PORT_16650 6
#define PORT_16650V2 7
#define PORT_16750 8
#define PORT_STARTECH 9
#define PORT_16C950 10 /* Oxford Semiconductor */
#define PORT_16654 11
#define PORT_16850 12
#define PORT_RSA 13 /* RSA-DV II/S card */
#define PORT_MAX 13
#define SERIAL_IO_PORT 0
#define SERIAL_IO_HUB6 1
#define SERIAL_IO_MEM 2
#define SERIAL_IO_MEM32 3
#define SERIAL_IO_AU 4
#define SERIAL_IO_TSI 5
#define SERIAL_IO_MEM32BE 6
#define SERIAL_IO_MEM16 7
#define UART_CLEAR_FIFO 0x01
#define UART_USE_FIFO 0x02
#define UART_STARTECH 0x04
#define UART_NATSEMI 0x08
/*
* Multiport serial configuration structure --- external structure
*/
struct serial_multiport_struct {
int irq;
int port1;
unsigned char mask1, match1;
int port2;
unsigned char mask2, match2;
int port3;
unsigned char mask3, match3;
int port4;
unsigned char mask4, match4;
int port_monitor;
int reserved[32];
};
/*
* Serial input interrupt line counters -- external structure
* Four lines can interrupt: CTS, DSR, RI, DCD
*/
struct serial_icounter_struct {
int cts, dsr, rng, dcd;
int rx, tx;
int frame, overrun, parity, brk;
int buf_overrun;
int reserved[9];
};
/**
* struct serial_rs485 - serial interface for controlling RS485 settings.
* @flags: RS485 feature flags.
* @delay_rts_before_send: Delay before send (milliseconds).
* @delay_rts_after_send: Delay after send (milliseconds).
* @addr_recv: Receive filter for RS485 addressing mode
* (used only when %SER_RS485_ADDR_RECV is set).
* @addr_dest: Destination address for RS485 addressing mode
* (used only when %SER_RS485_ADDR_DEST is set).
* @padding0: Padding (set to zero).
* @padding1: Padding (set to zero).
* @padding: Deprecated, use @padding0 and @padding1 instead.
* Do not use with @addr_recv and @addr_dest (due to
* overlap).
*
* Serial interface for controlling RS485 settings on chips with suitable
* support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
* platform. The set function returns the new state, with any unsupported bits
* reverted appropriately.
*
* The flag bits are:
*
* * %SER_RS485_ENABLED - RS485 enabled.
* * %SER_RS485_RTS_ON_SEND - Logical level for RTS pin when sending.
* * %SER_RS485_RTS_AFTER_SEND - Logical level for RTS pin after sent.
* * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line.
* * %SER_RS485_TERMINATE_BUS - Enable bus termination (if supported).
* * %SER_RS485_ADDRB - Enable RS485 addressing mode.
* * %SER_RS485_ADDR_RECV - Receive address filter (enables @addr_recv). Requires %SER_RS485_ADDRB.
* * %SER_RS485_ADDR_DEST - Destination address (enables @addr_dest). Requires %SER_RS485_ADDRB.
* * %SER_RS485_MODE_RS422 - Enable RS422. Requires %SER_RS485_ENABLED.
*/
struct serial_rs485 {
__u32 flags;
#define SER_RS485_ENABLED _BITUL(0)
#define SER_RS485_RTS_ON_SEND _BITUL(1)
#define SER_RS485_RTS_AFTER_SEND _BITUL(2)
/* Placeholder for bit 3: SER_RS485_RTS_BEFORE_SEND, which isn't used anymore */
#define SER_RS485_RX_DURING_TX _BITUL(4)
#define SER_RS485_TERMINATE_BUS _BITUL(5)
#define SER_RS485_ADDRB _BITUL(6)
#define SER_RS485_ADDR_RECV _BITUL(7)
#define SER_RS485_ADDR_DEST _BITUL(8)
#define SER_RS485_MODE_RS422 _BITUL(9)
__u32 delay_rts_before_send;
__u32 delay_rts_after_send;
/* The fields below are defined by flags */
union {
__u32 padding[5]; /* Memory is cheap, new structs are a pain */
struct {
__u8 addr_recv;
__u8 addr_dest;
__u8 padding0[2];
__u32 padding1[4];
};
};
};
/*
* Serial interface for controlling ISO7816 settings on chips with suitable
* support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by
* your platform.
*/
struct serial_iso7816 {
__u32 flags; /* ISO7816 feature flags */
#define SER_ISO7816_ENABLED (1 << 0)
#define SER_ISO7816_T_PARAM (0x0f << 4)
#define SER_ISO7816_T(t) (((t) & 0x0f) << 4)
__u32 tg;
__u32 sc_fi;
__u32 sc_di;
__u32 clk;
__u32 reserved[5];
};
#endif /* _LINUX_SERIAL_H */
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