65 static void mlb_usio_stop_tx(struct uart_port *port)  in mlb_usio_stop_tx()  argument
67 	writew(readw(port->membase + MLB_USIO_REG_FCR) & ~MLB_USIO_FCR_FTIE,  in mlb_usio_stop_tx()
68 	       port->membase + MLB_USIO_REG_FCR);  in mlb_usio_stop_tx()
69 	writeb(readb(port->membase + MLB_USIO_REG_SCR) & ~MLB_USIO_SCR_TBIE,  in mlb_usio_stop_tx()
70 	       port->membase + MLB_USIO_REG_SCR);  in mlb_usio_stop_tx()
73 static void mlb_usio_tx_chars(struct uart_port *port)  in mlb_usio_tx_chars()  argument
75 	struct tty_port *tport = &port->state->port;  in mlb_usio_tx_chars()
78 	writew(readw(port->membase + MLB_USIO_REG_FCR) & ~MLB_USIO_FCR_FTIE,  in mlb_usio_tx_chars()
79 	       port->membase + MLB_USIO_REG_FCR);  in mlb_usio_tx_chars()
80 	writeb(readb(port->membase + MLB_USIO_REG_SCR) &  in mlb_usio_tx_chars()
82 	       port->membase + MLB_USIO_REG_SCR);  in mlb_usio_tx_chars()
84 	if (port->x_char) {  in mlb_usio_tx_chars()
85 		writew(port->x_char, port->membase + MLB_USIO_REG_DR);  in mlb_usio_tx_chars()
86 		port->icount.tx++;  in mlb_usio_tx_chars()
87 		port->x_char = 0;  in mlb_usio_tx_chars()
90 	if (kfifo_is_empty(&tport->xmit_fifo) || uart_tx_stopped(port)) {  in mlb_usio_tx_chars()
91 		mlb_usio_stop_tx(port);  in mlb_usio_tx_chars()
95 	count = port->fifosize -  in mlb_usio_tx_chars()
96 		(readw(port->membase + MLB_USIO_REG_FBYTE) & 0xff);  in mlb_usio_tx_chars()
101 		if (!uart_fifo_get(port, &ch))  in mlb_usio_tx_chars()
104 		writew(ch, port->membase + MLB_USIO_REG_DR);  in mlb_usio_tx_chars()
105 		port->icount.tx++;  in mlb_usio_tx_chars()
108 	writew(readw(port->membase + MLB_USIO_REG_FCR) & ~MLB_USIO_FCR_FDRQ,  in mlb_usio_tx_chars()
109 	       port->membase + MLB_USIO_REG_FCR);  in mlb_usio_tx_chars()
111 	writeb(readb(port->membase + MLB_USIO_REG_SCR) | MLB_USIO_SCR_TBIE,  in mlb_usio_tx_chars()
112 	       port->membase + MLB_USIO_REG_SCR);  in mlb_usio_tx_chars()
115 		uart_write_wakeup(port);  in mlb_usio_tx_chars()
118 		mlb_usio_stop_tx(port);  in mlb_usio_tx_chars()
121 static void mlb_usio_start_tx(struct uart_port *port)  in mlb_usio_start_tx()  argument
123 	u16 fcr = readw(port->membase + MLB_USIO_REG_FCR);  in mlb_usio_start_tx()
125 	writew(fcr | MLB_USIO_FCR_FTIE, port->membase + MLB_USIO_REG_FCR);  in mlb_usio_start_tx()
129 	writeb(readb(port->membase + MLB_USIO_REG_SCR) | MLB_USIO_SCR_TBIE,  in mlb_usio_start_tx()
130 	       port->membase + MLB_USIO_REG_SCR);  in mlb_usio_start_tx()
132 	if (readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TBI)  in mlb_usio_start_tx()
133 		mlb_usio_tx_chars(port);  in mlb_usio_start_tx()
136 static void mlb_usio_stop_rx(struct uart_port *port)  in mlb_usio_stop_rx()  argument
138 	writeb(readb(port->membase + MLB_USIO_REG_SCR) & ~MLB_USIO_SCR_RIE,  in mlb_usio_stop_rx()
139 	       port->membase + MLB_USIO_REG_SCR);  in mlb_usio_stop_rx()
142 static void mlb_usio_enable_ms(struct uart_port *port)  in mlb_usio_enable_ms()  argument
144 	writeb(readb(port->membase + MLB_USIO_REG_SCR) |  in mlb_usio_enable_ms()
146 	       port->membase + MLB_USIO_REG_SCR);  in mlb_usio_enable_ms()
149 static void mlb_usio_rx_chars(struct uart_port *port)  in mlb_usio_rx_chars()  argument
151 	struct tty_port *ttyport = &port->state->port;  in mlb_usio_rx_chars()
157 		status = readb(port->membase + MLB_USIO_REG_SSR);  in mlb_usio_rx_chars()
164 			ch = readw(port->membase + MLB_USIO_REG_DR);  in mlb_usio_rx_chars()
166 			port->icount.rx++;  in mlb_usio_rx_chars()
167 			if (uart_handle_sysrq_char(port, ch))  in mlb_usio_rx_chars()
169 			uart_insert_char(port, status, MLB_USIO_SSR_ORE,  in mlb_usio_rx_chars()
174 			port->icount.parity++;  in mlb_usio_rx_chars()
176 			port->icount.overrun++;  in mlb_usio_rx_chars()
177 		status &= port->read_status_mask;  in mlb_usio_rx_chars()
191 			uart_insert_char(port, status, MLB_USIO_SSR_ORE,  in mlb_usio_rx_chars()
194 		writeb(readb(port->membase + MLB_USIO_REG_SSR) |  in mlb_usio_rx_chars()
196 				port->membase + MLB_USIO_REG_SSR);  in mlb_usio_rx_chars()
198 		max_count = readw(port->membase + MLB_USIO_REG_FBYTE) >> 8;  in mlb_usio_rx_chars()
199 		writew(readw(port->membase + MLB_USIO_REG_FCR) |  in mlb_usio_rx_chars()
201 		port->membase + MLB_USIO_REG_FCR);  in mlb_usio_rx_chars()
209 	struct uart_port *port = dev_id;  in mlb_usio_rx_irq()  local
211 	uart_port_lock(port);  in mlb_usio_rx_irq()
212 	mlb_usio_rx_chars(port);  in mlb_usio_rx_irq()
213 	uart_port_unlock(port);  in mlb_usio_rx_irq()
220 	struct uart_port *port = dev_id;  in mlb_usio_tx_irq()  local
222 	uart_port_lock(port);  in mlb_usio_tx_irq()
223 	if (readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TBI)  in mlb_usio_tx_irq()
224 		mlb_usio_tx_chars(port);  in mlb_usio_tx_irq()
225 	uart_port_unlock(port);  in mlb_usio_tx_irq()
230 static unsigned int mlb_usio_tx_empty(struct uart_port *port)  in mlb_usio_tx_empty()  argument
232 	return (readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TBI) ?  in mlb_usio_tx_empty()
236 static void mlb_usio_set_mctrl(struct uart_port *port, unsigned int mctrl)  in mlb_usio_set_mctrl()  argument
240 static unsigned int mlb_usio_get_mctrl(struct uart_port *port)  in mlb_usio_get_mctrl()  argument
246 static void mlb_usio_break_ctl(struct uart_port *port, int break_state)  in mlb_usio_break_ctl()  argument
250 static int mlb_usio_startup(struct uart_port *port)  in mlb_usio_startup()  argument
252 	const char *portname = to_platform_device(port->dev)->name;  in mlb_usio_startup()
254 	int ret, index = port->line;  in mlb_usio_startup()
258 				0, portname, port);  in mlb_usio_startup()
262 				0, portname, port);  in mlb_usio_startup()
264 		free_irq(mlb_usio_irq[index][RX], port);  in mlb_usio_startup()
268 	escr = readb(port->membase + MLB_USIO_REG_ESCR);  in mlb_usio_startup()
269 	if (of_property_read_bool(port->dev->of_node, "auto-flow-control"))  in mlb_usio_startup()
271 	uart_port_lock_irqsave(port, &flags);  in mlb_usio_startup()
272 	writeb(0, port->membase + MLB_USIO_REG_SCR);  in mlb_usio_startup()
273 	writeb(escr, port->membase + MLB_USIO_REG_ESCR);  in mlb_usio_startup()
274 	writeb(MLB_USIO_SCR_UPCL, port->membase + MLB_USIO_REG_SCR);  in mlb_usio_startup()
275 	writeb(MLB_USIO_SSR_REC, port->membase + MLB_USIO_REG_SSR);  in mlb_usio_startup()
276 	writew(0, port->membase + MLB_USIO_REG_FCR);  in mlb_usio_startup()
278 	       port->membase + MLB_USIO_REG_FCR);  in mlb_usio_startup()
280 	       port->membase + MLB_USIO_REG_FCR);  in mlb_usio_startup()
281 	writew(0, port->membase + MLB_USIO_REG_FBYTE);  in mlb_usio_startup()
282 	writew(BIT(12), port->membase + MLB_USIO_REG_FBYTE);  in mlb_usio_startup()
285 	       MLB_USIO_SCR_RXE, port->membase + MLB_USIO_REG_SCR);  in mlb_usio_startup()
286 	uart_port_unlock_irqrestore(port, flags);  in mlb_usio_startup()
291 static void mlb_usio_shutdown(struct uart_port *port)  in mlb_usio_shutdown()  argument
293 	int index = port->line;  in mlb_usio_shutdown()
295 	free_irq(mlb_usio_irq[index][RX], port);  in mlb_usio_shutdown()
296 	free_irq(mlb_usio_irq[index][TX], port);  in mlb_usio_shutdown()
299 static void mlb_usio_set_termios(struct uart_port *port,  in mlb_usio_set_termios()  argument
331 	if (of_property_read_bool(port->dev->of_node, "auto-flow-control") ||  in mlb_usio_set_termios()
335 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk);  in mlb_usio_set_termios()
337 		quot = port->uartclk / baud - 1;  in mlb_usio_set_termios()
341 	uart_port_lock_irqsave(port, &flags);  in mlb_usio_set_termios()
342 	uart_update_timeout(port, termios->c_cflag, baud);  in mlb_usio_set_termios()
343 	port->read_status_mask = MLB_USIO_SSR_ORE | MLB_USIO_SSR_RDRF |  in mlb_usio_set_termios()
346 		port->read_status_mask |= MLB_USIO_SSR_FRE | MLB_USIO_SSR_PE;  in mlb_usio_set_termios()
348 	port->ignore_status_mask = 0;  in mlb_usio_set_termios()
350 		port->ignore_status_mask |= MLB_USIO_SSR_FRE | MLB_USIO_SSR_PE;  in mlb_usio_set_termios()
352 		port->ignore_status_mask |= MLB_USIO_SSR_ORE;  in mlb_usio_set_termios()
354 		port->ignore_status_mask |= MLB_USIO_SSR_RDRF;  in mlb_usio_set_termios()
356 	writeb(0, port->membase + MLB_USIO_REG_SCR);  in mlb_usio_set_termios()
357 	writeb(MLB_USIO_SCR_UPCL, port->membase + MLB_USIO_REG_SCR);  in mlb_usio_set_termios()
358 	writeb(MLB_USIO_SSR_REC, port->membase + MLB_USIO_REG_SSR);  in mlb_usio_set_termios()
359 	writew(0, port->membase + MLB_USIO_REG_FCR);  in mlb_usio_set_termios()
360 	writeb(smr, port->membase + MLB_USIO_REG_SMR);  in mlb_usio_set_termios()
361 	writeb(escr, port->membase + MLB_USIO_REG_ESCR);  in mlb_usio_set_termios()
362 	writew(quot, port->membase + MLB_USIO_REG_BGR);  in mlb_usio_set_termios()
363 	writew(0, port->membase + MLB_USIO_REG_FCR);  in mlb_usio_set_termios()
366 	       port->membase + MLB_USIO_REG_FCR);  in mlb_usio_set_termios()
367 	writew(0, port->membase + MLB_USIO_REG_FBYTE);  in mlb_usio_set_termios()
368 	writew(BIT(12), port->membase + MLB_USIO_REG_FBYTE);  in mlb_usio_set_termios()
370 	       MLB_USIO_SCR_TXE, port->membase + MLB_USIO_REG_SCR);  in mlb_usio_set_termios()
371 	uart_port_unlock_irqrestore(port, flags);  in mlb_usio_set_termios()
374 static const char *mlb_usio_type(struct uart_port *port)  in mlb_usio_type()  argument
376 	return ((port->type == PORT_MLB_USIO) ? USIO_NAME : NULL);  in mlb_usio_type()
379 static void mlb_usio_config_port(struct uart_port *port, int flags)  in mlb_usio_config_port()  argument
382 		port->type = PORT_MLB_USIO;  in mlb_usio_config_port()
403 static void mlb_usio_console_putchar(struct uart_port *port, unsigned char c)  in mlb_usio_console_putchar()  argument
405 	while (!(readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TDRE))  in mlb_usio_console_putchar()
408 	writew(c, port->membase + MLB_USIO_REG_DR);  in mlb_usio_console_putchar()
414 	struct uart_port *port = &mlb_usio_ports[co->index];  in mlb_usio_console_write()  local
416 	uart_console_write(port, s, count, mlb_usio_console_putchar);  in mlb_usio_console_write()
421 	struct uart_port *port;  in mlb_usio_console_setup()  local
430 	port = &mlb_usio_ports[co->index];  in mlb_usio_console_setup()
431 	if (!port->membase)  in mlb_usio_console_setup()
438 	if (of_property_read_bool(port->dev->of_node, "auto-flow-control"))  in mlb_usio_console_setup()
441 	return uart_set_options(port, co, baud, parity, bits, flow);  in mlb_usio_console_setup()
469 	uart_console_write(&dev->port, s, count, mlb_usio_console_putchar);  in mlb_usio_early_console_write()
475 	if (!device->port.membase)  in mlb_usio_early_console_setup()
500 	struct uart_port *port;  in mlb_usio_probe()  local
515 	port = &mlb_usio_ports[index];  in mlb_usio_probe()
517 	port->private_data = (void *)clk;  in mlb_usio_probe()
524 	port->membase = devm_ioremap(&pdev->dev, res->start,  in mlb_usio_probe()
533 	port->irq = mlb_usio_irq[index][RX];  in mlb_usio_probe()
534 	port->uartclk = clk_get_rate(clk);  in mlb_usio_probe()
535 	port->fifosize = 128;  in mlb_usio_probe()
536 	port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MILBEAUT_USIO_CONSOLE);  in mlb_usio_probe()
537 	port->iotype = UPIO_MEM32;  in mlb_usio_probe()
538 	port->flags = UPF_BOOT_AUTOCONF | UPF_SPD_VHI;  in mlb_usio_probe()
539 	port->line = index;  in mlb_usio_probe()
540 	port->ops = &mlb_usio_ops;  in mlb_usio_probe()
541 	port->dev = &pdev->dev;  in mlb_usio_probe()
543 	ret = uart_add_one_port(&mlb_usio_uart_driver, port);  in mlb_usio_probe()
545 		dev_err(&pdev->dev, "Adding port failed: %d\n", ret);  in mlb_usio_probe()
558 	struct uart_port *port = &mlb_usio_ports[pdev->id];  in mlb_usio_remove()  local
559 	struct clk *clk = port->private_data;  in mlb_usio_remove()
561 	uart_remove_one_port(&mlb_usio_uart_driver, port);  in mlb_usio_remove()