1 // SPDX-License-Identifier: GPL-2.0
15  * Routine which returns the baud rate of the tty
50  *	Convert termios baud rate data into a speed. This should be called
53  *	->c_[io]speed directly as they are updated.
62 	cbaud = termios->c_cflag & CBAUD;  in tty_termios_baud_rate()
66 		return termios->c_ospeed;  in tty_termios_baud_rate()
80  *	Convert termios baud rate data into a speed. This should be called
83  *	->c_[io]speed directly as they are updated.
90 	unsigned int cbaud = (termios->c_cflag >> IBSHIFT) & CBAUD;  in tty_termios_input_baud_rate()
97 		return termios->c_ispeed;  in tty_termios_input_baud_rate()
133 	int ifound = -1, ofound = -1;  in tty_termios_encode_baud_rate()
140 	termios->c_ispeed = ibaud;  in tty_termios_encode_baud_rate()
141 	termios->c_ospeed = obaud;  in tty_termios_encode_baud_rate()
143 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) != B0)  in tty_termios_encode_baud_rate()
148 	 * digesting non-exact replies so fuzz a bit.  in tty_termios_encode_baud_rate()
151 	if ((termios->c_cflag & CBAUD) == BOTHER) {  in tty_termios_encode_baud_rate()
156 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) == BOTHER)  in tty_termios_encode_baud_rate()
159 	termios->c_cflag &= ~CBAUD;  in tty_termios_encode_baud_rate()
160 	termios->c_cflag &= ~(CBAUD << IBSHIFT);  in tty_termios_encode_baud_rate()
163 	 *	Our goal is to find a close match to the standard baud rate  in tty_termios_encode_baud_rate()
164 	 *	returned. Walk the baud rate table and if we get a very close  in tty_termios_encode_baud_rate()
170 		if (obaud - oclose <= baud_table[i] &&  in tty_termios_encode_baud_rate()
172 			termios->c_cflag |= baud_bits[i];  in tty_termios_encode_baud_rate()
175 		if (ibaud - iclose <= baud_table[i] &&  in tty_termios_encode_baud_rate()
184 				termios->c_cflag |= (baud_bits[i] << IBSHIFT);  in tty_termios_encode_baud_rate()
190 	if (ofound == -1)  in tty_termios_encode_baud_rate()
191 		termios->c_cflag |= BOTHER;  in tty_termios_encode_baud_rate()
195 	if (ifound == -1 && (ibaud != obaud || ibinput))  in tty_termios_encode_baud_rate()
196 		termios->c_cflag |= (BOTHER << IBSHIFT);  in tty_termios_encode_baud_rate()
201  *	tty_encode_baud_rate		-	set baud rate of the tty
203  *	@ibaud: input baud rate
204  *	@obaud: output baud rate
213 	tty_termios_encode_baud_rate(&tty->termios, ibaud, obaud);  in tty_encode_baud_rate()