forked from mirrors/linux
e15c99be0c
Since the commit93f3350c46("RS485: fix inconsistencies in the meaning of some variables"), the definition for bit 3 has been removed. But with the switch to bit shift macros in commit76ac8e2985("tty: serial: Cleanup the bit shift with macro"), this gap wasn't preserved. To avoid a break in user/kernel api of the system skip bit 3 again and add a placeholder comment. Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com> Fixes:76ac8e2985("tty: serial: Cleanup the bit shift with macro") Fixes:6056f20f27("tty: serial: Add RS422 flag to struct serial_rs485") Reviewed-by: Jiri Slaby <jirislaby@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Crescent CY Hsieh <crescentcy.hsieh@moxa.com> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Lukas Wunner <lukas@wunner.de> Cc: Lino Sanfilippo <l.sanfilippo@kunbus.com> Cc: Hugo Villeneuve <hugo@hugovil.com> Link: https://lore.kernel.org/r/20240119113516.2944-1-cniedermaier@dh-electronics.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
189 lines
5.1 KiB
C
189 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
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/*
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* include/linux/serial.h
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*
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* Copyright (C) 1992 by Theodore Ts'o.
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*
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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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*/
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#ifndef _UAPI_LINUX_SERIAL_H
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#define _UAPI_LINUX_SERIAL_H
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#include <linux/const.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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/*
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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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*/
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#define ASYNC_CLOSING_WAIT_INF 0
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#define ASYNC_CLOSING_WAIT_NONE 65535
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/*
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* These are the supported serial types.
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*/
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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
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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
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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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/*
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* Multiport serial configuration structure --- external structure
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*/
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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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/*
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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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*/
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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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/**
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* struct serial_rs485 - serial interface for controlling RS485 settings.
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* @flags: RS485 feature flags.
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* @delay_rts_before_send: Delay before send (milliseconds).
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* @delay_rts_after_send: Delay after send (milliseconds).
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* @addr_recv: Receive filter for RS485 addressing mode
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* (used only when %SER_RS485_ADDR_RECV is set).
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* @addr_dest: Destination address for RS485 addressing mode
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* (used only when %SER_RS485_ADDR_DEST is set).
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* @padding0: Padding (set to zero).
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* @padding1: Padding (set to zero).
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* @padding: Deprecated, use @padding0 and @padding1 instead.
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* Do not use with @addr_recv and @addr_dest (due to
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* overlap).
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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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*
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* The flag bits are:
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*
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* * %SER_RS485_ENABLED - RS485 enabled.
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* * %SER_RS485_RTS_ON_SEND - Logical level for RTS pin when sending.
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* * %SER_RS485_RTS_AFTER_SEND - Logical level for RTS pin after sent.
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* * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line.
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* * %SER_RS485_TERMINATE_BUS - Enable bus termination (if supported).
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* * %SER_RS485_ADDRB - Enable RS485 addressing mode.
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* * %SER_RS485_ADDR_RECV - Receive address filter (enables @addr_recv). Requires %SER_RS485_ADDRB.
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* * %SER_RS485_ADDR_DEST - Destination address (enables @addr_dest). Requires %SER_RS485_ADDRB.
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* * %SER_RS485_MODE_RS422 - Enable RS422. Requires %SER_RS485_ENABLED.
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*/
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struct serial_rs485 {
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__u32 flags;
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#define SER_RS485_ENABLED _BITUL(0)
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#define SER_RS485_RTS_ON_SEND _BITUL(1)
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#define SER_RS485_RTS_AFTER_SEND _BITUL(2)
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/* Placeholder for bit 3: SER_RS485_RTS_BEFORE_SEND, which isn't used anymore */
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#define SER_RS485_RX_DURING_TX _BITUL(4)
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#define SER_RS485_TERMINATE_BUS _BITUL(5)
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#define SER_RS485_ADDRB _BITUL(6)
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#define SER_RS485_ADDR_RECV _BITUL(7)
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#define SER_RS485_ADDR_DEST _BITUL(8)
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#define SER_RS485_MODE_RS422 _BITUL(9)
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__u32 delay_rts_before_send;
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__u32 delay_rts_after_send;
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/* The fields below are defined by flags */
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union {
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__u32 padding[5]; /* Memory is cheap, new structs are a pain */
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struct {
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__u8 addr_recv;
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__u8 addr_dest;
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__u8 padding0[2];
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__u32 padding1[4];
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};
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};
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};
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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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*/
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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 /* _UAPI_LINUX_SERIAL_H */
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