include/linux/serial.h

   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
  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 */