76 	struct uart_port port;  member
84 static inline void owl_uart_write(struct uart_port *port, u32 val, unsigned int off)  in owl_uart_write()  argument
86 	writel(val, port->membase + off);  in owl_uart_write()
89 static inline u32 owl_uart_read(struct uart_port *port, unsigned int off)  in owl_uart_read()  argument
91 	return readl(port->membase + off);  in owl_uart_read()
94 static void owl_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in owl_uart_set_mctrl()  argument
98 	ctl = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_set_mctrl()
105 	owl_uart_write(port, ctl, OWL_UART_CTL);  in owl_uart_set_mctrl()
108 static unsigned int owl_uart_get_mctrl(struct uart_port *port)  in owl_uart_get_mctrl()  argument
113 	ctl = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_get_mctrl()
114 	stat = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_get_mctrl()
122 static unsigned int owl_uart_tx_empty(struct uart_port *port)  in owl_uart_tx_empty()  argument
128 	uart_port_lock_irqsave(port, &flags);  in owl_uart_tx_empty()
130 	val = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_tx_empty()
133 	uart_port_unlock_irqrestore(port, flags);  in owl_uart_tx_empty()
138 static void owl_uart_stop_rx(struct uart_port *port)  in owl_uart_stop_rx()  argument
142 	val = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_stop_rx()
144 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_stop_rx()
146 	val = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_stop_rx()
148 	owl_uart_write(port, val, OWL_UART_STAT);  in owl_uart_stop_rx()
151 static void owl_uart_stop_tx(struct uart_port *port)  in owl_uart_stop_tx()  argument
155 	val = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_stop_tx()
157 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_stop_tx()
159 	val = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_stop_tx()
161 	owl_uart_write(port, val, OWL_UART_STAT);  in owl_uart_stop_tx()
164 static void owl_uart_start_tx(struct uart_port *port)  in owl_uart_start_tx()  argument
168 	if (uart_tx_stopped(port)) {  in owl_uart_start_tx()
169 		owl_uart_stop_tx(port);  in owl_uart_start_tx()
173 	val = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_start_tx()
175 	owl_uart_write(port, val, OWL_UART_STAT);  in owl_uart_start_tx()
177 	val = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_start_tx()
179 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_start_tx()
182 static void owl_uart_send_chars(struct uart_port *port)  in owl_uart_send_chars()  argument
186 	uart_port_tx(port, ch,  in owl_uart_send_chars()
187 		!(owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU),  in owl_uart_send_chars()
188 		owl_uart_write(port, ch, OWL_UART_TXDAT));  in owl_uart_send_chars()
191 static void owl_uart_receive_chars(struct uart_port *port)  in owl_uart_receive_chars()  argument
195 	val = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_receive_chars()
197 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_receive_chars()
199 	stat = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_receive_chars()
205 			port->icount.overrun++;  in owl_uart_receive_chars()
209 			port->icount.brk++;  in owl_uart_receive_chars()
210 			port->icount.frame++;  in owl_uart_receive_chars()
212 			stat &= port->read_status_mask;  in owl_uart_receive_chars()
216 			port->icount.rx++;  in owl_uart_receive_chars()
218 		val = owl_uart_read(port, OWL_UART_RXDAT);  in owl_uart_receive_chars()
221 		sysrq = uart_prepare_sysrq_char(port, val);  in owl_uart_receive_chars()
223 		if (!sysrq && (stat & port->ignore_status_mask) == 0)  in owl_uart_receive_chars()
224 			tty_insert_flip_char(&port->state->port, val, flag);  in owl_uart_receive_chars()
226 		stat = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_receive_chars()
229 	tty_flip_buffer_push(&port->state->port);  in owl_uart_receive_chars()
234 	struct uart_port *port = dev_id;  in owl_uart_irq()  local
237 	uart_port_lock(port);  in owl_uart_irq()
239 	stat = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_irq()
242 		owl_uart_receive_chars(port);  in owl_uart_irq()
245 		owl_uart_send_chars(port);  in owl_uart_irq()
247 	stat = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_irq()
249 	owl_uart_write(port, stat, OWL_UART_STAT);  in owl_uart_irq()
251 	uart_unlock_and_check_sysrq(port);  in owl_uart_irq()
256 static void owl_uart_shutdown(struct uart_port *port)  in owl_uart_shutdown()  argument
261 	uart_port_lock_irqsave(port, &flags);  in owl_uart_shutdown()
263 	val = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_shutdown()
266 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_shutdown()
268 	uart_port_unlock_irqrestore(port, flags);  in owl_uart_shutdown()
270 	free_irq(port->irq, port);  in owl_uart_shutdown()
273 static int owl_uart_startup(struct uart_port *port)  in owl_uart_startup()  argument
279 	ret = request_irq(port->irq, owl_uart_irq, IRQF_TRIGGER_HIGH,  in owl_uart_startup()
280 			"owl-uart", port);  in owl_uart_startup()
284 	uart_port_lock_irqsave(port, &flags);  in owl_uart_startup()
286 	val = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_startup()
289 	owl_uart_write(port, val, OWL_UART_STAT);  in owl_uart_startup()
291 	val = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_startup()
294 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_startup()
296 	uart_port_unlock_irqrestore(port, flags);  in owl_uart_startup()
307 static void owl_uart_set_termios(struct uart_port *port,  in owl_uart_set_termios()  argument
311 	struct owl_uart_port *owl_port = to_owl_uart_port(port);  in owl_uart_set_termios()
316 	uart_port_lock_irqsave(port, &flags);  in owl_uart_set_termios()
318 	ctl = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_set_termios()
361 	owl_uart_write(port, ctl, OWL_UART_CTL);  in owl_uart_set_termios()
363 	baud = uart_get_baud_rate(port, termios, old, 9600, 3200000);  in owl_uart_set_termios()
370 	port->read_status_mask |= OWL_UART_STAT_RXER;  in owl_uart_set_termios()
372 		port->read_status_mask |= OWL_UART_STAT_RXST;  in owl_uart_set_termios()
374 	uart_update_timeout(port, termios->c_cflag, baud);  in owl_uart_set_termios()
376 	uart_port_unlock_irqrestore(port, flags);  in owl_uart_set_termios()
379 static void owl_uart_release_port(struct uart_port *port)  in owl_uart_release_port()  argument
381 	struct platform_device *pdev = to_platform_device(port->dev);  in owl_uart_release_port()
388 	if (port->flags & UPF_IOREMAP) {  in owl_uart_release_port()
389 		devm_release_mem_region(port->dev, port->mapbase,  in owl_uart_release_port()
391 		devm_iounmap(port->dev, port->membase);  in owl_uart_release_port()
392 		port->membase = NULL;  in owl_uart_release_port()
396 static int owl_uart_request_port(struct uart_port *port)  in owl_uart_request_port()  argument
398 	struct platform_device *pdev = to_platform_device(port->dev);  in owl_uart_request_port()
405 	if (!devm_request_mem_region(port->dev, port->mapbase,  in owl_uart_request_port()
406 			resource_size(res), dev_name(port->dev)))  in owl_uart_request_port()
409 	if (port->flags & UPF_IOREMAP) {  in owl_uart_request_port()
410 		port->membase = devm_ioremap(port->dev, port->mapbase,  in owl_uart_request_port()
412 		if (!port->membase)  in owl_uart_request_port()
419 static const char *owl_uart_type(struct uart_port *port)  in owl_uart_type()  argument
421 	return (port->type == PORT_OWL) ? "owl-uart" : NULL;  in owl_uart_type()
424 static int owl_uart_verify_port(struct uart_port *port,  in owl_uart_verify_port()  argument
427 	if (port->type != PORT_OWL)  in owl_uart_verify_port()
430 	if (port->irq != ser->irq)  in owl_uart_verify_port()
436 static void owl_uart_config_port(struct uart_port *port, int flags)  in owl_uart_config_port()  argument
439 		port->type = PORT_OWL;  in owl_uart_config_port()
440 		owl_uart_request_port(port);  in owl_uart_config_port()
446 static int owl_uart_poll_get_char(struct uart_port *port)  in owl_uart_poll_get_char()  argument
448 	if (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_RFEM)  in owl_uart_poll_get_char()
451 	return owl_uart_read(port, OWL_UART_RXDAT);  in owl_uart_poll_get_char()
454 static void owl_uart_poll_put_char(struct uart_port *port, unsigned char ch)  in owl_uart_poll_put_char()  argument
460 	ret = readl_poll_timeout_atomic(port->membase + OWL_UART_STAT, reg,  in owl_uart_poll_put_char()
465 		dev_err(port->dev, "Timeout waiting while UART TX FULL\n");  in owl_uart_poll_put_char()
469 	owl_uart_write(port, ch, OWL_UART_TXDAT);  in owl_uart_poll_put_char()
497 static void owl_console_putchar(struct uart_port *port, unsigned char ch)  in owl_console_putchar()  argument
499 	if (!port->membase)  in owl_console_putchar()
502 	while (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU)  in owl_console_putchar()
505 	owl_uart_write(port, ch, OWL_UART_TXDAT);  in owl_console_putchar()
508 static void owl_uart_port_write(struct uart_port *port, const char *s,  in owl_uart_port_write()  argument
516 		locked = uart_port_trylock_irqsave(port, &flags);  in owl_uart_port_write()
518 		uart_port_lock_irqsave(port, &flags);  in owl_uart_port_write()
520 	old_ctl = owl_uart_read(port, OWL_UART_CTL);  in owl_uart_port_write()
524 	owl_uart_write(port, val, OWL_UART_CTL);  in owl_uart_port_write()
526 	uart_console_write(port, s, count, owl_console_putchar);  in owl_uart_port_write()
529 	while (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TRFL_MASK)  in owl_uart_port_write()
533 	val = owl_uart_read(port, OWL_UART_STAT);  in owl_uart_port_write()
535 	owl_uart_write(port, val, OWL_UART_STAT);  in owl_uart_port_write()
537 	owl_uart_write(port, old_ctl, OWL_UART_CTL);  in owl_uart_port_write()
540 		uart_port_unlock_irqrestore(port, flags);  in owl_uart_port_write()
552 	owl_uart_port_write(&owl_port->port, s, count);  in owl_uart_console_write()
567 	if (!owl_port || !owl_port->port.membase)  in owl_uart_console_setup()
573 	return uart_set_options(&owl_port->port, co, baud, parity, bits, flow);  in owl_uart_console_setup()
600 	owl_uart_port_write(&dev->port, s, count);  in owl_uart_early_console_write()
606 	if (!device->port.membase)  in owl_uart_early_console_setup()
675 		dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);  in owl_uart_probe()
695 	owl_port->port.dev = &pdev->dev;  in owl_uart_probe()
696 	owl_port->port.line = pdev->id;  in owl_uart_probe()
697 	owl_port->port.type = PORT_OWL;  in owl_uart_probe()
698 	owl_port->port.iotype = UPIO_MEM;  in owl_uart_probe()
699 	owl_port->port.mapbase = res_mem->start;  in owl_uart_probe()
700 	owl_port->port.irq = irq;  in owl_uart_probe()
701 	owl_port->port.uartclk = clk_get_rate(owl_port->clk);  in owl_uart_probe()
702 	if (owl_port->port.uartclk == 0) {  in owl_uart_probe()
707 	owl_port->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_LOW_LATENCY;  in owl_uart_probe()
708 	owl_port->port.x_char = 0;  in owl_uart_probe()
709 	owl_port->port.fifosize = (info) ? info->tx_fifosize : 16;  in owl_uart_probe()
710 	owl_port->port.ops = &owl_uart_ops;  in owl_uart_probe()
715 	ret = uart_add_one_port(&owl_uart_driver, &owl_port->port);  in owl_uart_probe()
726 	uart_remove_one_port(&owl_uart_driver, &owl_port->port);  in owl_uart_remove()