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 #define UART_IER_ALL_INTR	(UART_IER_MSI | \
16 				 UART_IER_RLSI | \
17 				 UART_IER_THRI | \
18 				 UART_IER_RDI)
19 
20 /* Helper for dealing with UART_LCR_WLEN* defines */
21 #define UART_LCR_WLEN(x)	((x) - 5)
22 
23 /* FIFO and shifting register empty */
24 #define UART_LSR_BOTH_EMPTY	(UART_LSR_TEMT | UART_LSR_THRE)
25 
uart_lsr_tx_empty(u16 lsr)26 static inline bool uart_lsr_tx_empty(u16 lsr)
27 {
28 	return (lsr & UART_LSR_BOTH_EMPTY) == UART_LSR_BOTH_EMPTY;
29 }
30 
31 #define UART_MSR_STATUS_BITS	(UART_MSR_DCD | \
32 				 UART_MSR_RI | \
33 				 UART_MSR_DSR | \
34 				 UART_MSR_CTS)
35 
36 /*
37  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
38  */
39 
40 struct async_icount {
41 	__u32	cts, dsr, rng, dcd, tx, rx;
42 	__u32	frame, parity, overrun, brk;
43 	__u32	buf_overrun;
44 };
45 
46 #include <linux/compiler.h>
47 
48 #endif /* _LINUX_SERIAL_H */
49