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
250 	struct circ_buf *xmit = &port->state->xmit;  in altera_uart_tx_chars()
252 	if (port->x_char) {  in altera_uart_tx_chars()
254 		altera_uart_writel(port, port->x_char, ALTERA_UART_TXDATA_REG);  in altera_uart_tx_chars()
255 		port->x_char = 0;  in altera_uart_tx_chars()
256 		port->icount.tx++;  in altera_uart_tx_chars()
260 	while (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_tx_chars()
264 		altera_uart_writel(port, xmit->buf[xmit->tail],  in altera_uart_tx_chars()
267 		port->icount.tx++;  in altera_uart_tx_chars()
271 		uart_write_wakeup(port);  in altera_uart_tx_chars()
274 		altera_uart_stop_tx(port);  in altera_uart_tx_chars()
279 	struct uart_port *port = data;  in altera_uart_interrupt()  local
280 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_interrupt()
284 	isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr;  in altera_uart_interrupt()
286 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_interrupt()
288 		altera_uart_rx_chars(port);  in altera_uart_interrupt()
290 		altera_uart_tx_chars(port);  in altera_uart_interrupt()
291 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_interrupt()
299 	struct uart_port *port = &pp->port;  in altera_uart_timer()  local
301 	altera_uart_interrupt(0, port);  in altera_uart_timer()
302 	mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));  in altera_uart_timer()
305 static void altera_uart_config_port(struct uart_port *port, int flags)  in altera_uart_config_port()  argument
307 	port->type = PORT_ALTERA_UART;  in altera_uart_config_port()
310 	altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG);  in altera_uart_config_port()
312 	altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG);  in altera_uart_config_port()
315 static int altera_uart_startup(struct uart_port *port)  in altera_uart_startup()  argument
317 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_startup()
320 	if (!port->irq) {  in altera_uart_startup()
322 		mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));  in altera_uart_startup()
326 		ret = request_irq(port->irq, altera_uart_interrupt, 0,  in altera_uart_startup()
327 				DRV_NAME, port);  in altera_uart_startup()
330 			       "interrupt vector=%d\n", port->line, port->irq);  in altera_uart_startup()
335 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_startup()
341 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_startup()
346 static void altera_uart_shutdown(struct uart_port *port)  in altera_uart_shutdown()  argument
348 	struct altera_uart *pp = container_of(port, struct altera_uart, port);  in altera_uart_shutdown()
351 	spin_lock_irqsave(&port->lock, flags);  in altera_uart_shutdown()
357 	spin_unlock_irqrestore(&port->lock, flags);  in altera_uart_shutdown()
359 	if (port->irq)  in altera_uart_shutdown()
360 		free_irq(port->irq, port);  in altera_uart_shutdown()
365 static const char *altera_uart_type(struct uart_port *port)  in altera_uart_type()  argument
367 	return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL;  in altera_uart_type()
370 static int altera_uart_request_port(struct uart_port *port)  in altera_uart_request_port()  argument
376 static void altera_uart_release_port(struct uart_port *port)  in altera_uart_release_port()  argument
381 static int altera_uart_verify_port(struct uart_port *port,  in altera_uart_verify_port()  argument
390 static int altera_uart_poll_get_char(struct uart_port *port)  in altera_uart_poll_get_char()  argument
392 	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_poll_get_char()
396 	return altera_uart_readl(port, ALTERA_UART_RXDATA_REG);  in altera_uart_poll_get_char()
399 static void altera_uart_poll_put_char(struct uart_port *port, unsigned char c)  in altera_uart_poll_put_char()  argument
401 	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_poll_put_char()
405 	altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG);  in altera_uart_poll_put_char()
438 static void altera_uart_console_putc(struct uart_port *port, unsigned char c)  in altera_uart_console_putc()  argument
440 	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &  in altera_uart_console_putc()
444 	altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG);  in altera_uart_console_putc()
450 	struct uart_port *port = &(altera_uart_ports + co->index)->port;  in altera_uart_console_write()  local
452 	uart_console_write(port, s, count, altera_uart_console_putc);  in altera_uart_console_write()
457 	struct uart_port *port;  in altera_uart_console_setup()  local
465 	port = &altera_uart_ports[co->index].port;  in altera_uart_console_setup()
466 	if (!port->membase)  in altera_uart_console_setup()
472 	return uart_set_options(port, co, baud, parity, bits, flow);  in altera_uart_console_setup()
502 	uart_console_write(&dev->port, s, count, altera_uart_console_putc);  in altera_uart_earlycon_write()
508 	struct uart_port *port = &dev->port;  in altera_uart_earlycon_setup()  local
510 	if (!port->membase)  in altera_uart_earlycon_setup()
514 	altera_uart_writel(port, ALTERA_UART_CONTROL_RRDY_MSK,  in altera_uart_earlycon_setup()
518 		unsigned int baudclk = port->uartclk / dev->baud;  in altera_uart_earlycon_setup()
520 		altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG);  in altera_uart_earlycon_setup()
551 	struct uart_port *port;  in altera_uart_probe()  local
559 			if (altera_uart_ports[i].port.mapbase == 0)  in altera_uart_probe()
566 	port = &altera_uart_ports[i].port;  in altera_uart_probe()
570 		port->mapbase = res_mem->start;  in altera_uart_probe()
572 		port->mapbase = platp->mapbase;  in altera_uart_probe()
580 		port->irq = ret;  in altera_uart_probe()
582 		port->irq = platp->irq;  in altera_uart_probe()
586 		port->uartclk = platp->uartclk;  in altera_uart_probe()
589 					   &port->uartclk);  in altera_uart_probe()
594 	port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);  in altera_uart_probe()
595 	if (!port->membase)  in altera_uart_probe()
599 		port->regshift = platp->bus_shift;  in altera_uart_probe()
601 		port->regshift = 0;  in altera_uart_probe()
603 	port->line = i;  in altera_uart_probe()
604 	port->type = PORT_ALTERA_UART;  in altera_uart_probe()
605 	port->iotype = SERIAL_IO_MEM;  in altera_uart_probe()
606 	port->ops = &altera_uart_ops;  in altera_uart_probe()
607 	port->flags = UPF_BOOT_AUTOCONF;  in altera_uart_probe()
608 	port->dev = &pdev->dev;  in altera_uart_probe()
610 	platform_set_drvdata(pdev, port);  in altera_uart_probe()
612 	uart_add_one_port(&altera_uart_driver, port);  in altera_uart_probe()
619 	struct uart_port *port = platform_get_drvdata(pdev);  in altera_uart_remove()  local
621 	if (port) {  in altera_uart_remove()
622 		uart_remove_one_port(&altera_uart_driver, port);  in altera_uart_remove()
623 		port->mapbase = 0;  in altera_uart_remove()
624 		iounmap(port->membase);  in altera_uart_remove()