include/linux/serial.h at v6.1 · tjh.dev/kernel

tjh.dev / kernel

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kernel os linux

kernel / include / linux / serial.h

at v6.1 836 B view raw

 1/*
 2 * include/linux/serial.h
 3 *
 4 * Copyright (C) 1992 by Theodore Ts'o.
 5 * 
 6 * Redistribution of this file is permitted under the terms of the GNU 
 7 * Public License (GPL)
 8 */
 9#ifndef _LINUX_SERIAL_H
10#define _LINUX_SERIAL_H
11
12#include <uapi/linux/serial.h>
13#include <uapi/linux/serial_reg.h>
14
15/* Helper for dealing with UART_LCR_WLEN* defines */
16#define UART_LCR_WLEN(x)	((x) - 5)
17
18/* FIFO and shifting register empty */
19#define UART_LSR_BOTH_EMPTY	(UART_LSR_TEMT | UART_LSR_THRE)
20
21static inline bool uart_lsr_tx_empty(u16 lsr)
22{
23	return (lsr & UART_LSR_BOTH_EMPTY) == UART_LSR_BOTH_EMPTY;
24}
25
26/*
27 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
28 */
29
30struct async_icount {
31	__u32	cts, dsr, rng, dcd, tx, rx;
32	__u32	frame, parity, overrun, brk;
33	__u32	buf_overrun;
34};
35
36#include <linux/compiler.h>
37
38#endif /* _LINUX_SERIAL_H */