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
uart_lsr_tx_empty(u16 lsr)21 static 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
30 struct 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 */
39