LXR linux/drivers/staging/speakup/serialio.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _SPEAKUP_SERIAL_H
   3#define _SPEAKUP_SERIAL_H
   4
   5#include <linux/serial.h>       /* for rs_table, serial constants */
   6#include <linux/serial_reg.h>   /* for more serial constants */
   7#ifndef __sparc__
   8#include <linux/serial.h>
   9#endif
  10#include <linux/serial_core.h>
  11
  12#include "spk_priv.h"
  13
  14/*
  15 * this is cut&paste from 8250.h. Get rid of the structure, the definitions
  16 * and this whole broken driver.
  17 */
  18struct old_serial_port {
  19        unsigned int uart; /* unused */
  20        unsigned int baud_base;
  21        unsigned int port;
  22        unsigned int irq;
  23        upf_t flags; /* unused */
  24};
  25
  26/* countdown values for serial timeouts in us */
  27#define SPK_SERIAL_TIMEOUT SPK_SYNTH_TIMEOUT
  28/* countdown values transmitter/dsr timeouts in us */
  29#define SPK_XMITR_TIMEOUT 100000
  30/* countdown values cts timeouts in us */
  31#define SPK_CTS_TIMEOUT 100000
  32/* check ttyS0 ... ttyS3 */
  33#define SPK_LO_TTY 0
  34#define SPK_HI_TTY 3
  35/* # of timeouts permitted before disable */
  36#define NUM_DISABLE_TIMEOUTS 3
  37/* buffer timeout in ms */
  38#define SPK_TIMEOUT 100
  39#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
  40
  41#define spk_serial_tx_busy() \
  42        ((inb(speakup_info.port_tts + UART_LSR) & BOTH_EMPTY) != BOTH_EMPTY)
  43
  44#endif
  45