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