1 // SPDX-License-Identifier: GPL-2.0
5  *  Copyright (C) 2014-2016 Ricardo Ribalda, Qtechnology A/S
104 	outb(reg, pdata->base_port + ADDR_PORT);  in sio_read_reg()
105 	return inb(pdata->base_port + DATA_PORT);  in sio_read_reg()
110 	outb(reg, pdata->base_port + ADDR_PORT);  in sio_write_reg()
111 	outb(data, pdata->base_port + DATA_PORT);  in sio_write_reg()
126 		return -EBUSY;  in fintek_8250_enter_key()
148 		return -ENODEV;  in fintek_8250_check_id()
151 		return -ENODEV;  in fintek_8250_check_id()
165 		return -ENODEV;  in fintek_8250_check_id()
168 	pdata->pid = chip;  in fintek_8250_check_id()
175 	switch (pdata->pid) {  in fintek_8250_get_ldn_range()
191 	return -ENODEV;  in fintek_8250_get_ldn_range()
198 	struct fintek_8250 *pdata = port->private_data;  in fintek_8250_rs485_config()
201 		return -EINVAL;  in fintek_8250_rs485_config()
204 	if (!(rs485->flags & SER_RS485_RTS_ON_SEND) ==  in fintek_8250_rs485_config()
205 			!(rs485->flags & SER_RS485_RTS_AFTER_SEND))  in fintek_8250_rs485_config()
206 		return -EINVAL;  in fintek_8250_rs485_config()
208 	if (rs485->flags & SER_RS485_ENABLED) {  in fintek_8250_rs485_config()
209 		memset(rs485->padding, 0, sizeof(rs485->padding));  in fintek_8250_rs485_config()
215 	rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND |  in fintek_8250_rs485_config()
219 	if (pdata->index) {  in fintek_8250_rs485_config()
220 		rs485->delay_rts_before_send = 0;  in fintek_8250_rs485_config()
221 		rs485->delay_rts_after_send = 0;  in fintek_8250_rs485_config()
224 	if (rs485->delay_rts_before_send) {  in fintek_8250_rs485_config()
225 		rs485->delay_rts_before_send = 1;  in fintek_8250_rs485_config()
229 	if (rs485->delay_rts_after_send) {  in fintek_8250_rs485_config()
230 		rs485->delay_rts_after_send = 1;  in fintek_8250_rs485_config()
234 	if (rs485->flags & SER_RS485_RTS_ON_SEND)  in fintek_8250_rs485_config()
237 	if (fintek_8250_enter_key(pdata->base_port, pdata->key))  in fintek_8250_rs485_config()
238 		return -EBUSY;  in fintek_8250_rs485_config()
240 	sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_rs485_config()
242 	fintek_8250_exit_key(pdata->base_port);  in fintek_8250_rs485_config()
244 	port->rs485 = *rs485;  in fintek_8250_rs485_config()
251 	sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_set_irq_mode()
253 	switch (pdata->pid) {  in fintek_8250_set_irq_mode()
279 	switch (pdata->pid) {  in fintek_8250_set_max_fifo()
296 	sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_goto_highspeed()
298 	switch (pdata->pid) {  in fintek_8250_goto_highspeed()
305 		uart->port.uartclk = 921600 * 16;  in fintek_8250_goto_highspeed()
316 	struct fintek_8250 *pdata = port->private_data;  in fintek_8250_set_termios()
317 	unsigned int baud = tty_termios_baud_rate(termios);  in fintek_8250_set_termios()  local
326 	 * We'll use serial8250_do_set_termios() for baud = 0, otherwise It'll  in fintek_8250_set_termios()
327 	 * crash on baudrate_table[i] % baud with "division by zero".  in fintek_8250_set_termios()
329 	if (!baud)  in fintek_8250_set_termios()
332 	switch (pdata->pid) {  in fintek_8250_set_termios()
342 		dev_warn(port->dev,  in fintek_8250_set_termios()
344 			__func__, pdata->pid);  in fintek_8250_set_termios()
349 		if (baud > baudrate_table[i] || baudrate_table[i] % baud != 0)  in fintek_8250_set_termios()
352 		if (port->uartclk == baudrate_table[i] * 16)  in fintek_8250_set_termios()
355 		if (fintek_8250_enter_key(pdata->base_port, pdata->key))  in fintek_8250_set_termios()
358 		port->uartclk = baudrate_table[i] * 16;  in fintek_8250_set_termios()
360 		sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_set_termios()
364 		fintek_8250_exit_key(pdata->base_port);  in fintek_8250_set_termios()
369 		baud = tty_termios_baud_rate(old);  in fintek_8250_set_termios()
370 		tty_termios_encode_baud_rate(termios, baud, baud);  in fintek_8250_set_termios()
379 	struct fintek_8250 *pdata = uart->port.private_data;  in fintek_8250_set_termios_handler()
381 	switch (pdata->pid) {  in fintek_8250_set_termios_handler()
385 		uart->port.set_termios = fintek_8250_set_termios;  in fintek_8250_set_termios_handler()
404 			pdata->base_port = addr[i];  in probe_setup_port()
405 			pdata->key = keys[j];  in probe_setup_port()
421 				if (aux != uart->port.iobase)  in probe_setup_port()
424 				pdata->index = k;  in probe_setup_port()
426 				irq_data = irq_get_irq_data(uart->port.irq);  in probe_setup_port()
444 	return -ENODEV;  in probe_setup_port()
449 	struct fintek_8250 *pdata = uart->port.private_data;  in fintek_8250_set_rs485_handler()
451 	switch (pdata->pid) {  in fintek_8250_set_rs485_handler()
457 		uart->port.rs485_config = fintek_8250_rs485_config;  in fintek_8250_set_rs485_handler()
460 	default: /* No RS485 Auto direction functional */  in fintek_8250_set_rs485_handler()
471 		return -ENODEV;  in fintek_8250_probe()
473 	pdata = devm_kzalloc(uart->port.dev, sizeof(*pdata), GFP_KERNEL);  in fintek_8250_probe()
475 		return -ENOMEM;  in fintek_8250_probe()
478 	uart->port.private_data = pdata;  in fintek_8250_probe()