1 // SPDX-License-Identifier: GPL-2.0
5  *  Copyright (C) 2014-2016 Ricardo Ribalda, Qtechnology A/S
105 	outb(reg, pdata->base_port + ADDR_PORT);  in sio_read_reg()
106 	return inb(pdata->base_port + DATA_PORT);  in sio_read_reg()
111 	outb(reg, pdata->base_port + ADDR_PORT);  in sio_write_reg()
112 	outb(data, pdata->base_port + DATA_PORT);  in sio_write_reg()
127 		return -EBUSY;  in fintek_8250_enter_key()
149 		return -ENODEV;  in fintek_8250_check_id()
152 		return -ENODEV;  in fintek_8250_check_id()
167 		return -ENODEV;  in fintek_8250_check_id()
170 	pdata->pid = chip;  in fintek_8250_check_id()
177 	switch (pdata->pid) {  in fintek_8250_get_ldn_range()
194 	return -ENODEV;  in fintek_8250_get_ldn_range()
201 	struct fintek_8250 *pdata = port->private_data;  in fintek_8250_rs485_config()
204 		return -EINVAL;  in fintek_8250_rs485_config()
207 	if (rs485->flags & SER_RS485_ENABLED) {  in fintek_8250_rs485_config()
209 		if (!(rs485->flags & SER_RS485_RTS_ON_SEND) ==  in fintek_8250_rs485_config()
210 		    !(rs485->flags & SER_RS485_RTS_AFTER_SEND))  in fintek_8250_rs485_config()
211 			return -EINVAL;  in fintek_8250_rs485_config()
215 	if (rs485->delay_rts_before_send) {  in fintek_8250_rs485_config()
216 		rs485->delay_rts_before_send = 1;  in fintek_8250_rs485_config()
220 	if (rs485->delay_rts_after_send) {  in fintek_8250_rs485_config()
221 		rs485->delay_rts_after_send = 1;  in fintek_8250_rs485_config()
225 	if (rs485->flags & SER_RS485_RTS_ON_SEND)  in fintek_8250_rs485_config()
228 	if (fintek_8250_enter_key(pdata->base_port, pdata->key))  in fintek_8250_rs485_config()
229 		return -EBUSY;  in fintek_8250_rs485_config()
231 	sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_rs485_config()
233 	fintek_8250_exit_key(pdata->base_port);  in fintek_8250_rs485_config()
240 	sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_set_irq_mode()
242 	switch (pdata->pid) {  in fintek_8250_set_irq_mode()
269 	switch (pdata->pid) {  in fintek_8250_set_max_fifo()
288 	struct fintek_8250 *pdata = port->private_data;  in fintek_8250_set_termios()
289 	unsigned int baud = tty_termios_baud_rate(termios);  in fintek_8250_set_termios()  local
298 	 * We'll use serial8250_do_set_termios() for baud = 0, otherwise It'll  in fintek_8250_set_termios()
299 	 * crash on baudrate_table[i] % baud with "division by zero".  in fintek_8250_set_termios()
301 	if (!baud)  in fintek_8250_set_termios()
304 	switch (pdata->pid) {  in fintek_8250_set_termios()
315 		dev_warn(port->dev,  in fintek_8250_set_termios()
317 			__func__, pdata->pid);  in fintek_8250_set_termios()
322 		if (baud > baudrate_table[i] || baudrate_table[i] % baud != 0)  in fintek_8250_set_termios()
325 		if (port->uartclk == baudrate_table[i] * 16)  in fintek_8250_set_termios()
328 		if (fintek_8250_enter_key(pdata->base_port, pdata->key))  in fintek_8250_set_termios()
331 		port->uartclk = baudrate_table[i] * 16;  in fintek_8250_set_termios()
333 		sio_write_reg(pdata, LDN, pdata->index);  in fintek_8250_set_termios()
337 		fintek_8250_exit_key(pdata->base_port);  in fintek_8250_set_termios()
342 		baud = tty_termios_baud_rate(old);  in fintek_8250_set_termios()
343 		tty_termios_encode_baud_rate(termios, baud, baud);  in fintek_8250_set_termios()
352 	struct fintek_8250 *pdata = uart->port.private_data;  in fintek_8250_set_termios_handler()
354 	switch (pdata->pid) {  in fintek_8250_set_termios_handler()
359 		uart->port.set_termios = fintek_8250_set_termios;  in fintek_8250_set_termios_handler()
378 			pdata->base_port = addr[i];  in probe_setup_port()
379 			pdata->key = keys[j];  in probe_setup_port()
395 				if (aux != uart->port.iobase)  in probe_setup_port()
398 				pdata->index = k;  in probe_setup_port()
400 				irq_data = irq_get_irq_data(uart->port.irq);  in probe_setup_port()
417 	return -ENODEV;  in probe_setup_port()
433 	struct fintek_8250 *pdata = uart->port.private_data;  in fintek_8250_set_rs485_handler()
435 	switch (pdata->pid) {  in fintek_8250_set_rs485_handler()
441 		uart->port.rs485_config = fintek_8250_rs485_config;  in fintek_8250_set_rs485_handler()
442 		if (!pdata->index)  in fintek_8250_set_rs485_handler()
443 			uart->port.rs485_supported = fintek_8250_rs485_supported_port0;  in fintek_8250_set_rs485_handler()
445 			uart->port.rs485_supported = fintek_8250_rs485_supported;  in fintek_8250_set_rs485_handler()
449 		uart->port.rs485_config = fintek_8250_rs485_config;  in fintek_8250_set_rs485_handler()
450 		uart->port.rs485_supported = fintek_8250_rs485_supported;  in fintek_8250_set_rs485_handler()
453 	default: /* No RS485 Auto direction functional */  in fintek_8250_set_rs485_handler()
464 		return -ENODEV;  in fintek_8250_probe()
466 	pdata = devm_kzalloc(uart->port.dev, sizeof(*pdata), GFP_KERNEL);  in fintek_8250_probe()
468 		return -ENOMEM;  in fintek_8250_probe()
471 	uart->port.private_data = pdata;  in fintek_8250_probe()