78 	struct uart_port port;  member
84 static u32 altera_uart_readl(struct uart_port *port, int reg)  in altera_uart_readl()  argument
86 	return readl(port->membase + (reg << port->regshift));  in altera_uart_readl()
89 static void altera_uart_writel(struct uart_port *port, u32 dat, int reg)  in altera_uart_writel()  argument
91 	writel(dat, port->membase + (reg << port->regshift));  in altera_uart_writel()
94 static unsigned int altera_uart_tx_empty(struct uart_port *port)  in altera_uart_tx_empty()  argument
96 	return (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_tx_empty()
100 static unsigned int altera_uart_get_mctrl(struct uart_port *port)  in altera_uart_get_mctrl()  argument
102 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_get_mctrl()
105 	sigs = (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_get_mctrl()
120 	if (!pp->port.irq)  in altera_uart_update_ctrl_reg()
123 	altera_uart_writel(&pp->port, imr, ALTERA_UART_CONTROL_REG);  in altera_uart_update_ctrl_reg()
126 static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs)  in altera_uart_set_mctrl()  argument
128 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_set_mctrl()
138 static void altera_uart_start_tx(struct uart_port *port)  in altera_uart_start_tx()  argument
140 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_start_tx()
146 static void altera_uart_stop_tx(struct uart_port *port)  in altera_uart_stop_tx()  argument
148 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_stop_tx()
154 static void altera_uart_stop_rx(struct uart_port *port)  in altera_uart_stop_rx()  argument
156 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_stop_rx()
162 static void altera_uart_break_ctl(struct uart_port *port, int break_state)  in altera_uart_break_ctl()  argument
164 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_break_ctl()
167 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_break_ctl()
173 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_break_ctl()
176 static void altera_uart_set_termios(struct uart_port *port,  in altera_uart_set_termios()  argument
183 	baud = uart_get_baud_rate(port, termios, old, 0, 4000000);  in altera_uart_set_termios()
184 	baudclk = port->uartclk / baud;  in altera_uart_set_termios()
190 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_set_termios()
191 	uart_update_timeout(port, termios->c_cflag, baud);  in altera_uart_set_termios()
192 	altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG);  in altera_uart_set_termios()
193 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_set_termios()
202 static void altera_uart_rx_chars(struct uart_port *port)  in altera_uart_rx_chars()  argument
207 	while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) &  in altera_uart_rx_chars()
209 		ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG);  in altera_uart_rx_chars()
211 		port->icount.rx++;  in altera_uart_rx_chars()
214 			altera_uart_writel(port, status,  in altera_uart_rx_chars()
218 				port->icount.brk++;  in altera_uart_rx_chars()
219 				if (uart_handle_break(port))  in altera_uart_rx_chars()
222 				port->icount.parity++;  in altera_uart_rx_chars()
224 				port->icount.overrun++;  in altera_uart_rx_chars()
226 				port->icount.frame++;  in altera_uart_rx_chars()
229 			status &= port->read_status_mask;  in altera_uart_rx_chars()
239 		if (uart_handle_sysrq_char(port, ch))  in altera_uart_rx_chars()
241 		uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch,  in altera_uart_rx_chars()
245 	tty_flip_buffer_push(&port->state->port);  in altera_uart_rx_chars()
248 static void altera_uart_tx_chars(struct uart_port *port)  in altera_uart_tx_chars()  argument
252 	uart_port_tx(port, ch,  in altera_uart_tx_chars()
253 		altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_tx_chars()
255 		altera_uart_writel(port, ch, ALTERA_UART_TXDATA_REG));  in altera_uart_tx_chars()
260 	struct uart_port *port = data;  in altera_uart_interrupt()  local
261 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_interrupt()
265 	isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr;  in altera_uart_interrupt()
267 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_interrupt()
269 		altera_uart_rx_chars(port);  in altera_uart_interrupt()
271 		altera_uart_tx_chars(port);  in altera_uart_interrupt()
272 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_interrupt()
280 	struct uart_port *port = &pp->port;  in altera_uart_timer()  local
282 	altera_uart_interrupt(0, port);  in altera_uart_timer()
283 	mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));  in altera_uart_timer()
286 static void altera_uart_config_port(struct uart_port *port, int flags)  in altera_uart_config_port()  argument
288 	port->type = PORT_ALTERA_UART;  in altera_uart_config_port()
291 	altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG);  in altera_uart_config_port()
293 	altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG);  in altera_uart_config_port()
296 static int altera_uart_startup(struct uart_port *port)  in altera_uart_startup()  argument
298 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_startup()
301 	if (!port->irq) {  in altera_uart_startup()
303 		mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));  in altera_uart_startup()
307 		ret = request_irq(port->irq, altera_uart_interrupt, 0,  in altera_uart_startup()
308 				DRV_NAME, port);  in altera_uart_startup()
311 			       "interrupt vector=%d\n", port->line, port->irq);  in altera_uart_startup()
316 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_startup()
322 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_startup()
327 static void altera_uart_shutdown(struct uart_port *port)  in altera_uart_shutdown()  argument
329 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_shutdown()
332 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_shutdown()
338 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_shutdown()
340 	if (port->irq)  in altera_uart_shutdown()
341 		free_irq(port->irq, port);  in altera_uart_shutdown()
346 static const char *altera_uart_type(struct uart_port *port)  in altera_uart_type()  argument
348 	return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL;  in altera_uart_type()
351 static int altera_uart_request_port(struct uart_port *port)  in altera_uart_request_port()  argument
357 static void altera_uart_release_port(struct uart_port *port)  in altera_uart_release_port()  argument
362 static int altera_uart_verify_port(struct uart_port *port,  in altera_uart_verify_port()  argument
371 static int altera_uart_poll_get_char(struct uart_port *port)  in altera_uart_poll_get_char()  argument
373 	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_poll_get_char()
377 	return altera_uart_readl(port, ALTERA_UART_RXDATA_REG);  in altera_uart_poll_get_char()
380 static void altera_uart_poll_put_char(struct uart_port *port, unsigned char c)  in altera_uart_poll_put_char()  argument
382 	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_poll_put_char()
386 	altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG);  in altera_uart_poll_put_char()
419 static void altera_uart_console_putc(struct uart_port *port, unsigned char c)  in altera_uart_console_putc()  argument
421 	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_console_putc()
425 	altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG);  in altera_uart_console_putc()
431 	struct uart_port *port = &(altera_uart_ports + co->index)->port;  in altera_uart_console_write()  local
433 	uart_console_write(port, s, count, altera_uart_console_putc);  in altera_uart_console_write()
438 	struct uart_port *port;  in altera_uart_console_setup()  local
446 	port = &altera_uart_ports[co->index].port;  in altera_uart_console_setup()
447 	if (!port->membase)  in altera_uart_console_setup()
453 	return uart_set_options(port, co, baud, parity, bits, flow);  in altera_uart_console_setup()
483 	uart_console_write(&dev->port, s, count, altera_uart_console_putc);  in altera_uart_earlycon_write()
489 	struct uart_port *port = &dev->port;  in altera_uart_earlycon_setup()  local
491 	if (!port->membase)  in altera_uart_earlycon_setup()
495 	altera_uart_writel(port, ALTERA_UART_CONTROL_RRDY_MSK,  in altera_uart_earlycon_setup()
499 		unsigned int baudclk = port->uartclk / dev->baud;  in altera_uart_earlycon_setup()
501 		altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG);  in altera_uart_earlycon_setup()
532 	struct uart_port *port;  in altera_uart_probe()  local
540 			if (altera_uart_ports[i].port.mapbase == 0)  in altera_uart_probe()
547 	port = &altera_uart_ports[i].port;  in altera_uart_probe()
551 		port->mapbase = res_mem->start;  in altera_uart_probe()
553 		port->mapbase = platp->mapbase;  in altera_uart_probe()
561 		port->irq = ret;  in altera_uart_probe()
563 		port->irq = platp->irq;  in altera_uart_probe()
567 		port->uartclk = platp->uartclk;  in altera_uart_probe()
570 					   &port->uartclk);  in altera_uart_probe()
575 	port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);  in altera_uart_probe()
576 	if (!port->membase)  in altera_uart_probe()
580 		port->regshift = platp->bus_shift;  in altera_uart_probe()
582 		port->regshift = 0;  in altera_uart_probe()
584 	port->line = i;  in altera_uart_probe()
585 	port->type = PORT_ALTERA_UART;  in altera_uart_probe()
586 	port->iotype = SERIAL_IO_MEM;  in altera_uart_probe()
587 	port->ops = &altera_uart_ops;  in altera_uart_probe()
588 	port->flags = UPF_BOOT_AUTOCONF;  in altera_uart_probe()
589 	port->dev = &pdev->dev;  in altera_uart_probe()
591 	platform_set_drvdata(pdev, port);  in altera_uart_probe()
593 	uart_add_one_port(&altera_uart_driver, port);  in altera_uart_probe()
600 	struct uart_port *port = platform_get_drvdata(pdev);  in altera_uart_remove()  local
602 	if (port) {  in altera_uart_remove()
603 		uart_remove_one_port(&altera_uart_driver, port);  in altera_uart_remove()
604 		port->mapbase = 0;  in altera_uart_remove()
605 		iounmap(port->membase);  in altera_uart_remove()