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serial.h
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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 */