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