46 	struct uart_port port;  member
51 #define to_liteuart_port(port)	container_of(port, struct liteuart_port, port)  argument
71 static void liteuart_update_irq_reg(struct uart_port *port, bool set, u8 mask)  in liteuart_update_irq_reg()  argument
73 	struct liteuart_port *uart = to_liteuart_port(port);  in liteuart_update_irq_reg()
80 	if (port->irq)  in liteuart_update_irq_reg()
81 		litex_write8(port->membase + OFF_EV_ENABLE, uart->irq_reg);  in liteuart_update_irq_reg()
84 static void liteuart_stop_tx(struct uart_port *port)  in liteuart_stop_tx()  argument
86 	liteuart_update_irq_reg(port, false, EV_TX);  in liteuart_stop_tx()
89 static void liteuart_start_tx(struct uart_port *port)  in liteuart_start_tx()  argument
91 	liteuart_update_irq_reg(port, true, EV_TX);  in liteuart_start_tx()
94 static void liteuart_stop_rx(struct uart_port *port)  in liteuart_stop_rx()  argument
96 	struct liteuart_port *uart = to_liteuart_port(port);  in liteuart_stop_rx()
102 static void liteuart_rx_chars(struct uart_port *port)  in liteuart_rx_chars()  argument
104 	unsigned char __iomem *membase = port->membase;  in liteuart_rx_chars()
109 		port->icount.rx++;  in liteuart_rx_chars()
115 		if (!(uart_handle_sysrq_char(port, ch)))  in liteuart_rx_chars()
116 			uart_insert_char(port, 1, 0, ch, TTY_NORMAL);  in liteuart_rx_chars()
119 	tty_flip_buffer_push(&port->state->port);  in liteuart_rx_chars()
122 static void liteuart_tx_chars(struct uart_port *port)  in liteuart_tx_chars()  argument
126 	uart_port_tx(port, ch,  in liteuart_tx_chars()
127 		!litex_read8(port->membase + OFF_TXFULL),  in liteuart_tx_chars()
128 		litex_write8(port->membase + OFF_RXTX, ch));  in liteuart_tx_chars()
134 	struct uart_port *port = &uart->port;  in liteuart_interrupt()  local
142 	uart_port_lock_irqsave(port, &flags);  in liteuart_interrupt()
143 	isr = litex_read8(port->membase + OFF_EV_PENDING) & uart->irq_reg;  in liteuart_interrupt()
145 		liteuart_rx_chars(port);  in liteuart_interrupt()
147 		liteuart_tx_chars(port);  in liteuart_interrupt()
148 	uart_port_unlock_irqrestore(port, flags);  in liteuart_interrupt()
156 	struct uart_port *port = &uart->port;  in liteuart_timer()  local
158 	liteuart_interrupt(0, port);  in liteuart_timer()
159 	mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));  in liteuart_timer()
162 static unsigned int liteuart_tx_empty(struct uart_port *port)  in liteuart_tx_empty()  argument
165 	if (!litex_read8(port->membase + OFF_TXFULL))  in liteuart_tx_empty()
171 static void liteuart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in liteuart_set_mctrl()  argument
176 static unsigned int liteuart_get_mctrl(struct uart_port *port)  in liteuart_get_mctrl()  argument
181 static int liteuart_startup(struct uart_port *port)  in liteuart_startup()  argument
183 	struct liteuart_port *uart = to_liteuart_port(port);  in liteuart_startup()
187 	if (port->irq) {  in liteuart_startup()
188 		ret = request_irq(port->irq, liteuart_interrupt, 0,  in liteuart_startup()
191 			dev_warn(port->dev,  in liteuart_startup()
193 				port->line, port->irq);  in liteuart_startup()
194 			port->irq = 0;  in liteuart_startup()
198 	uart_port_lock_irqsave(port, &flags);  in liteuart_startup()
200 	liteuart_update_irq_reg(port, true, EV_RX);  in liteuart_startup()
201 	uart_port_unlock_irqrestore(port, flags);  in liteuart_startup()
203 	if (!port->irq) {  in liteuart_startup()
205 		mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));  in liteuart_startup()
211 static void liteuart_shutdown(struct uart_port *port)  in liteuart_shutdown()  argument
213 	struct liteuart_port *uart = to_liteuart_port(port);  in liteuart_shutdown()
216 	uart_port_lock_irqsave(port, &flags);  in liteuart_shutdown()
217 	liteuart_update_irq_reg(port, false, EV_RX | EV_TX);  in liteuart_shutdown()
218 	uart_port_unlock_irqrestore(port, flags);  in liteuart_shutdown()
220 	if (port->irq)  in liteuart_shutdown()
221 		free_irq(port->irq, port);  in liteuart_shutdown()
226 static void liteuart_set_termios(struct uart_port *port, struct ktermios *new,  in liteuart_set_termios()  argument
232 	uart_port_lock_irqsave(port, &flags);  in liteuart_set_termios()
235 	baud = uart_get_baud_rate(port, new, old, 0, 460800);  in liteuart_set_termios()
236 	uart_update_timeout(port, new->c_cflag, baud);  in liteuart_set_termios()
238 	uart_port_unlock_irqrestore(port, flags);  in liteuart_set_termios()
241 static const char *liteuart_type(struct uart_port *port)  in liteuart_type()  argument
246 static void liteuart_config_port(struct uart_port *port, int flags)  in liteuart_config_port()  argument
249 	 * Driver core for serial ports forces a non-zero value for port type.  in liteuart_config_port()
253 	port->type = 1;  in liteuart_config_port()
256 static int liteuart_verify_port(struct uart_port *port,  in liteuart_verify_port()  argument
259 	if (port->type != PORT_UNKNOWN && ser->type != 1)  in liteuart_verify_port()
283 	struct uart_port *port;  in liteuart_probe()  local
291 	port = &uart->port;  in liteuart_probe()
294 	port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);  in liteuart_probe()
295 	if (IS_ERR(port->membase))  in liteuart_probe()
296 		return PTR_ERR(port->membase);  in liteuart_probe()
302 		port->irq = ret;  in liteuart_probe()
316 	port->dev = &pdev->dev;  in liteuart_probe()
317 	port->iotype = UPIO_MEM;  in liteuart_probe()
318 	port->flags = UPF_BOOT_AUTOCONF;  in liteuart_probe()
319 	port->ops = &liteuart_ops;  in liteuart_probe()
320 	port->fifosize = 16;  in liteuart_probe()
321 	port->type = PORT_UNKNOWN;  in liteuart_probe()
322 	port->line = dev_id;  in liteuart_probe()
323 	spin_lock_init(&port->lock);  in liteuart_probe()
325 	platform_set_drvdata(pdev, port);  in liteuart_probe()
327 	ret = uart_add_one_port(&liteuart_driver, &uart->port);  in liteuart_probe()
341 	struct uart_port *port = platform_get_drvdata(pdev);  in liteuart_remove()  local
342 	unsigned int line = port->line;  in liteuart_remove()
344 	uart_remove_one_port(&liteuart_driver, port);  in liteuart_remove()
365 static void liteuart_putchar(struct uart_port *port, unsigned char ch)  in liteuart_putchar()  argument
367 	while (litex_read8(port->membase + OFF_TXFULL))  in liteuart_putchar()
370 	litex_write8(port->membase + OFF_RXTX, ch);  in liteuart_putchar()
377 	struct uart_port *port;  in liteuart_console_write()  local
381 	port = &uart->port;  in liteuart_console_write()
383 	uart_port_lock_irqsave(port, &flags);  in liteuart_console_write()
384 	uart_console_write(port, s, count, liteuart_putchar);  in liteuart_console_write()
385 	uart_port_unlock_irqrestore(port, flags);  in liteuart_console_write()
391 	struct uart_port *port;  in liteuart_console_setup()  local
401 	port = &uart->port;  in liteuart_console_setup()
402 	if (!port->membase)  in liteuart_console_setup()
408 	return uart_set_options(port, co, baud, parity, bits, flow);  in liteuart_console_setup()
433 	struct uart_port *port = &device->port;  in early_liteuart_write()  local
435 	uart_console_write(port, s, count, liteuart_putchar);  in early_liteuart_write()
441 	if (!device->port.membase)  in early_liteuart_setup()