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 */
15struct 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
37#define spk_serial_tx_busy() \
38	(!uart_lsr_tx_empty(inb(speakup_info.port_tts + UART_LSR)))
39
40#endif