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/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */

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* include/linux/serial.h

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* Redistribution of this file is permitted under the terms of the GNU

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* Public License (GPL)

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#ifndef _LINUX_SERIAL_H

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#define _LINUX_SERIAL_H

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#include <linux/types.h>

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#include <linux/tty_flags.h>

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struct serial_struct {

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int type;

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int line;

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unsigned int port;

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int irq;

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int flags;

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int xmit_fifo_size;

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int custom_divisor;

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int baud_base;

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unsigned short close_delay;

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char io_type;

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char reserved_char[1];

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int hub6;

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unsigned short closing_wait; /* time to wait before closing */

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unsigned short closing_wait2; /* no longer used... */

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unsigned char *iomem_base;

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unsigned short iomem_reg_shift;

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unsigned int port_high;

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unsigned long iomap_base; /* cookie passed into ioremap */

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};

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* For the close wait times, 0 means wait forever for serial port to

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* flush its output. 65535 means don't wait at all.

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#define ASYNC_CLOSING_WAIT_INF 0

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#define ASYNC_CLOSING_WAIT_NONE 65535

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* These are the supported serial types.

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#define PORT_UNKNOWN 0

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#define PORT_8250 1

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#define PORT_16450 2

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#define PORT_16550 3

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#define PORT_16550A 4

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#define PORT_CIRRUS 5 /* usurped by cyclades.c */

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#define PORT_16650 6

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#define PORT_16650V2 7

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#define PORT_16750 8

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#define PORT_STARTECH 9 /* usurped by cyclades.c */

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#define PORT_16C950 10 /* Oxford Semiconductor */

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#define PORT_16654 11

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#define PORT_16850 12

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#define PORT_RSA 13 /* RSA-DV II/S card */

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#define PORT_MAX 13

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#define SERIAL_IO_PORT 0

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#define SERIAL_IO_HUB6 1

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#define SERIAL_IO_MEM 2

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#define SERIAL_IO_MEM32 3

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#define SERIAL_IO_AU 4

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#define SERIAL_IO_TSI 5

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#define SERIAL_IO_MEM32BE 6

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#define SERIAL_IO_MEM16 7

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#define UART_CLEAR_FIFO 0x01

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#define UART_USE_FIFO 0x02

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#define UART_STARTECH 0x04

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#define UART_NATSEMI 0x08

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* Multiport serial configuration structure --- external structure

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struct serial_multiport_struct {

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int irq;

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int port1;

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unsigned char mask1, match1;

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int port2;

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unsigned char mask2, match2;

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int port3;

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unsigned char mask3, match3;

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int port4;

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unsigned char mask4, match4;

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int port_monitor;

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int reserved[32];

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};

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* Serial input interrupt line counters -- external structure

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* Four lines can interrupt: CTS, DSR, RI, DCD

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struct serial_icounter_struct {

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int cts, dsr, rng, dcd;

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int rx, tx;

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int frame, overrun, parity, brk;

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int buf_overrun;

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int reserved[9];

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};

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* Serial interface for controlling RS485 settings on chips with suitable

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* support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your

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* platform. The set function returns the new state, with any unsupported bits

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* reverted appropriately.

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struct serial_rs485 {

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__u32 flags; /* RS485 feature flags */

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#define SER_RS485_ENABLED (1 << 0) /* If enabled */

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#define SER_RS485_RTS_ON_SEND (1 << 1) /* Logical level for

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RTS pin when

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sending */

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#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for

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RTS pin after sent*/

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#define SER_RS485_RX_DURING_TX (1 << 4)

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#define SER_RS485_TERMINATE_BUS (1 << 5) /* Enable bus

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termination

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(if supported) */

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__u32 delay_rts_before_send; /* Delay before send (milliseconds) */

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__u32 delay_rts_after_send; /* Delay after send (milliseconds) */

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__u32 padding[5]; /* Memory is cheap, new structs

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are a royal PITA .. */

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};

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* Serial interface for controlling ISO7816 settings on chips with suitable

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* support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by

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* your platform.

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struct serial_iso7816 {

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__u32 flags; /* ISO7816 feature flags */

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#define SER_ISO7816_ENABLED (1 << 0)

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#define SER_ISO7816_T_PARAM (0x0f << 4)

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#define SER_ISO7816_T(t) (((t) & 0x0f) << 4)

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__u32 tg;

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__u32 sc_fi;

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__u32 sc_di;

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__u32 clk;

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__u32 reserved[5];

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};

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#endif /* _LINUX_SERIAL_H */

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