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
42