89 static void meson_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in meson_uart_set_mctrl()  argument
93 static unsigned int meson_uart_get_mctrl(struct uart_port *port)  in meson_uart_get_mctrl()  argument
98 static unsigned int meson_uart_tx_empty(struct uart_port *port)  in meson_uart_tx_empty()  argument
102 	val = readl(port->membase + AML_UART_STATUS);  in meson_uart_tx_empty()
106 static void meson_uart_stop_tx(struct uart_port *port)  in meson_uart_stop_tx()  argument
110 	val = readl(port->membase + AML_UART_CONTROL);  in meson_uart_stop_tx()
112 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_stop_tx()
115 static void meson_uart_stop_rx(struct uart_port *port)  in meson_uart_stop_rx()  argument
119 	val = readl(port->membase + AML_UART_CONTROL);  in meson_uart_stop_rx()
121 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_stop_rx()
124 static void meson_uart_shutdown(struct uart_port *port)  in meson_uart_shutdown()  argument
129 	free_irq(port->irq, port);  in meson_uart_shutdown()
131 	spin_lock_irqsave(&port->lock, flags);  in meson_uart_shutdown()
133 	val = readl(port->membase + AML_UART_CONTROL);  in meson_uart_shutdown()
136 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_shutdown()
138 	spin_unlock_irqrestore(&port->lock, flags);  in meson_uart_shutdown()
141 static void meson_uart_start_tx(struct uart_port *port)  in meson_uart_start_tx()  argument
143 	struct circ_buf *xmit = &port->state->xmit;  in meson_uart_start_tx()
146 	if (uart_tx_stopped(port)) {  in meson_uart_start_tx()
147 		meson_uart_stop_tx(port);  in meson_uart_start_tx()
151 	while (!(readl(port->membase + AML_UART_STATUS) & AML_UART_TX_FULL)) {  in meson_uart_start_tx()
152 		if (port->x_char) {  in meson_uart_start_tx()
153 			writel(port->x_char, port->membase + AML_UART_WFIFO);  in meson_uart_start_tx()
154 			port->icount.tx++;  in meson_uart_start_tx()
155 			port->x_char = 0;  in meson_uart_start_tx()
163 		writel(ch, port->membase + AML_UART_WFIFO);  in meson_uart_start_tx()
165 		port->icount.tx++;  in meson_uart_start_tx()
169 		uart_write_wakeup(port);  in meson_uart_start_tx()
172 static void meson_receive_chars(struct uart_port *port)  in meson_receive_chars()  argument
174 	struct tty_port *tport = &port->state->port;  in meson_receive_chars()
180 		port->icount.rx++;  in meson_receive_chars()
181 		status = readl(port->membase + AML_UART_STATUS);  in meson_receive_chars()
185 				port->icount.overrun++;  in meson_receive_chars()
187 				port->icount.frame++;  in meson_receive_chars()
189 				port->icount.frame++;  in meson_receive_chars()
191 			mode = readl(port->membase + AML_UART_CONTROL);  in meson_receive_chars()
193 			writel(mode, port->membase + AML_UART_CONTROL);  in meson_receive_chars()
197 			writel(mode, port->membase + AML_UART_CONTROL);  in meson_receive_chars()
199 			status &= port->read_status_mask;  in meson_receive_chars()
206 		ch = readl(port->membase + AML_UART_RFIFO);  in meson_receive_chars()
209 		if ((status & port->ignore_status_mask) == 0)  in meson_receive_chars()
215 	} while (!(readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY));  in meson_receive_chars()
217 	spin_unlock(&port->lock);  in meson_receive_chars()
219 	spin_lock(&port->lock);  in meson_receive_chars()
224 	struct uart_port *port = (struct uart_port *)dev_id;  in meson_uart_interrupt()  local
226 	spin_lock(&port->lock);  in meson_uart_interrupt()
228 	if (!(readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY))  in meson_uart_interrupt()
229 		meson_receive_chars(port);  in meson_uart_interrupt()
231 	if (!(readl(port->membase + AML_UART_STATUS) & AML_UART_TX_FULL))  in meson_uart_interrupt()
232 		meson_uart_start_tx(port);  in meson_uart_interrupt()
234 	spin_unlock(&port->lock);  in meson_uart_interrupt()
239 static const char *meson_uart_type(struct uart_port *port)  in meson_uart_type()  argument
241 	return (port->type == PORT_MESON) ? "meson_uart" : NULL;  in meson_uart_type()
244 static int meson_uart_startup(struct uart_port *port)  in meson_uart_startup()  argument
249 	val = readl(port->membase + AML_UART_CONTROL);  in meson_uart_startup()
251 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_startup()
254 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_startup()
257 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_startup()
260 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_startup()
262 	val = (AML_UART_RECV_IRQ(1) | AML_UART_XMIT_IRQ(port->fifosize / 2));  in meson_uart_startup()
263 	writel(val, port->membase + AML_UART_MISC);  in meson_uart_startup()
265 	ret = request_irq(port->irq, meson_uart_interrupt, 0,  in meson_uart_startup()
266 			  meson_uart_type(port), port);  in meson_uart_startup()
271 static void meson_uart_change_speed(struct uart_port *port, unsigned long baud)  in meson_uart_change_speed()  argument
275 	while (!(readl(port->membase + AML_UART_STATUS) & AML_UART_TX_EMPTY))  in meson_uart_change_speed()
278 	val = readl(port->membase + AML_UART_REG5);  in meson_uart_change_speed()
280 	val = ((port->uartclk * 10 / (baud * 4) + 5) / 10) - 1;  in meson_uart_change_speed()
282 	writel(val, port->membase + AML_UART_REG5);  in meson_uart_change_speed()
285 static void meson_uart_set_termios(struct uart_port *port,  in meson_uart_set_termios()  argument
293 	spin_lock_irqsave(&port->lock, flags);  in meson_uart_set_termios()
298 	val = readl(port->membase + AML_UART_CONTROL);  in meson_uart_set_termios()
337 	writel(val, port->membase + AML_UART_CONTROL);  in meson_uart_set_termios()
339 	baud = uart_get_baud_rate(port, termios, old, 9600, 115200);  in meson_uart_set_termios()
340 	meson_uart_change_speed(port, baud);  in meson_uart_set_termios()
342 	port->read_status_mask = AML_UART_TX_FIFO_WERR;  in meson_uart_set_termios()
344 		port->read_status_mask |= AML_UART_PARITY_ERR |  in meson_uart_set_termios()
347 	port->ignore_status_mask = 0;  in meson_uart_set_termios()
349 		port->ignore_status_mask |= AML_UART_PARITY_ERR |  in meson_uart_set_termios()
352 	uart_update_timeout(port, termios->c_cflag, baud);  in meson_uart_set_termios()
353 	spin_unlock_irqrestore(&port->lock, flags);  in meson_uart_set_termios()
356 static int meson_uart_verify_port(struct uart_port *port,  in meson_uart_verify_port()  argument
361 	if (port->type != PORT_MESON)  in meson_uart_verify_port()
363 	if (port->irq != ser->irq)  in meson_uart_verify_port()
370 static void meson_uart_release_port(struct uart_port *port)  in meson_uart_release_port()  argument
372 	if (port->flags & UPF_IOREMAP) {  in meson_uart_release_port()
373 		iounmap(port->membase);  in meson_uart_release_port()
374 		port->membase = NULL;  in meson_uart_release_port()
378 static int meson_uart_request_port(struct uart_port *port)  in meson_uart_request_port()  argument
380 	struct platform_device *pdev = to_platform_device(port->dev);  in meson_uart_request_port()
391 	if (!devm_request_mem_region(port->dev, port->mapbase, size,  in meson_uart_request_port()
392 				     dev_name(port->dev))) {  in meson_uart_request_port()
393 		dev_err(port->dev, "Memory region busy\n");  in meson_uart_request_port()
397 	if (port->flags & UPF_IOREMAP) {  in meson_uart_request_port()
398 		port->membase = devm_ioremap_nocache(port->dev,  in meson_uart_request_port()
399 						     port->mapbase,  in meson_uart_request_port()
401 		if (port->membase == NULL)  in meson_uart_request_port()
408 static void meson_uart_config_port(struct uart_port *port, int flags)  in meson_uart_config_port()  argument
411 		port->type = PORT_MESON;  in meson_uart_config_port()
412 		meson_uart_request_port(port);  in meson_uart_config_port()
435 static void meson_console_putchar(struct uart_port *port, int ch)  in meson_console_putchar()  argument
437 	if (!port->membase)  in meson_console_putchar()
440 	while (readl(port->membase + AML_UART_STATUS) & AML_UART_TX_FULL)  in meson_console_putchar()
442 	writel(ch, port->membase + AML_UART_WFIFO);  in meson_console_putchar()
448 	struct uart_port *port;  in meson_serial_console_write()  local
452 	port = meson_ports[co->index];  in meson_serial_console_write()
453 	if (!port)  in meson_serial_console_write()
457 	if (port->sysrq) {  in meson_serial_console_write()
460 		locked = spin_trylock(&port->lock);  in meson_serial_console_write()
462 		spin_lock(&port->lock);  in meson_serial_console_write()
466 	uart_console_write(port, s, count, meson_console_putchar);  in meson_serial_console_write()
469 		spin_unlock(&port->lock);  in meson_serial_console_write()
475 	struct uart_port *port;  in meson_serial_console_setup()  local
484 	port = meson_ports[co->index];  in meson_serial_console_setup()
485 	if (!port || !port->membase)  in meson_serial_console_setup()
491 	return uart_set_options(port, co, baud, parity, bits, flow);  in meson_serial_console_setup()
527 	struct uart_port *port;  in meson_uart_probe()  local
550 	port = devm_kzalloc(&pdev->dev, sizeof(struct uart_port), GFP_KERNEL);  in meson_uart_probe()
551 	if (!port)  in meson_uart_probe()
558 	port->uartclk = clk_get_rate(clk);  in meson_uart_probe()
559 	port->iotype = UPIO_MEM;  in meson_uart_probe()
560 	port->mapbase = res_mem->start;  in meson_uart_probe()
561 	port->irq = res_irq->start;  in meson_uart_probe()
562 	port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_LOW_LATENCY;  in meson_uart_probe()
563 	port->dev = &pdev->dev;  in meson_uart_probe()
564 	port->line = pdev->id;  in meson_uart_probe()
565 	port->type = PORT_MESON;  in meson_uart_probe()
566 	port->x_char = 0;  in meson_uart_probe()
567 	port->ops = &meson_uart_ops;  in meson_uart_probe()
568 	port->fifosize = 64;  in meson_uart_probe()
570 	meson_ports[pdev->id] = port;  in meson_uart_probe()
571 	platform_set_drvdata(pdev, port);  in meson_uart_probe()
573 	ret = uart_add_one_port(&meson_uart_driver, port);  in meson_uart_probe()
582 	struct uart_port *port;  in meson_uart_remove()  local
584 	port = platform_get_drvdata(pdev);  in meson_uart_remove()
585 	uart_remove_one_port(&meson_uart_driver, port);  in meson_uart_remove()