36 	struct uart_port port;  member
146 static inline struct asc_port *to_asc_port(struct uart_port *port)  in to_asc_port()  argument
148 	return container_of(port, struct asc_port, port);  in to_asc_port()
151 static inline u32 asc_in(struct uart_port *port, u32 offset)  in asc_in()  argument
154 	return readl_relaxed(port->membase + offset);  in asc_in()
156 	return readl(port->membase + offset);  in asc_in()
160 static inline void asc_out(struct uart_port *port, u32 offset, u32 value)  in asc_out()  argument
163 	writel_relaxed(value, port->membase + offset);  in asc_out()
165 	writel(value, port->membase + offset);  in asc_out()
173 static inline void asc_disable_tx_interrupts(struct uart_port *port)  in asc_disable_tx_interrupts()  argument
175 	u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_THE;  in asc_disable_tx_interrupts()
176 	asc_out(port, ASC_INTEN, intenable);  in asc_disable_tx_interrupts()
177 	(void)asc_in(port, ASC_INTEN);	/* Defeat bus write posting */  in asc_disable_tx_interrupts()
180 static inline void asc_enable_tx_interrupts(struct uart_port *port)  in asc_enable_tx_interrupts()  argument
182 	u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_THE;  in asc_enable_tx_interrupts()
183 	asc_out(port, ASC_INTEN, intenable);  in asc_enable_tx_interrupts()
186 static inline void asc_disable_rx_interrupts(struct uart_port *port)  in asc_disable_rx_interrupts()  argument
188 	u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_RBE;  in asc_disable_rx_interrupts()
189 	asc_out(port, ASC_INTEN, intenable);  in asc_disable_rx_interrupts()
190 	(void)asc_in(port, ASC_INTEN);	/* Defeat bus write posting */  in asc_disable_rx_interrupts()
193 static inline void asc_enable_rx_interrupts(struct uart_port *port)  in asc_enable_rx_interrupts()  argument
195 	u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_RBE;  in asc_enable_rx_interrupts()
196 	asc_out(port, ASC_INTEN, intenable);  in asc_enable_rx_interrupts()
199 static inline u32 asc_txfifo_is_empty(struct uart_port *port)  in asc_txfifo_is_empty()  argument
201 	return asc_in(port, ASC_STA) & ASC_STA_TE;  in asc_txfifo_is_empty()
204 static inline u32 asc_txfifo_is_half_empty(struct uart_port *port)  in asc_txfifo_is_half_empty()  argument
206 	return asc_in(port, ASC_STA) & ASC_STA_THE;  in asc_txfifo_is_half_empty()
209 static inline const char *asc_port_name(struct uart_port *port)  in asc_port_name()  argument
211 	return to_platform_device(port->dev)->name;  in asc_port_name()
221 static inline unsigned asc_hw_txroom(struct uart_port *port)  in asc_hw_txroom()  argument
223 	u32 status = asc_in(port, ASC_STA);  in asc_hw_txroom()
226 		return port->fifosize / 2;  in asc_hw_txroom()
238 static void asc_transmit_chars(struct uart_port *port)  in asc_transmit_chars()  argument
240 	struct circ_buf *xmit = &port->state->xmit;  in asc_transmit_chars()
244 	txroom = asc_hw_txroom(port);  in asc_transmit_chars()
246 	if ((txroom != 0) && port->x_char) {  in asc_transmit_chars()
247 		c = port->x_char;  in asc_transmit_chars()
248 		port->x_char = 0;  in asc_transmit_chars()
249 		asc_out(port, ASC_TXBUF, c);  in asc_transmit_chars()
250 		port->icount.tx++;  in asc_transmit_chars()
251 		txroom = asc_hw_txroom(port);  in asc_transmit_chars()
254 	if (uart_tx_stopped(port)) {  in asc_transmit_chars()
259 		asc_disable_tx_interrupts(port);  in asc_transmit_chars()
264 		asc_disable_tx_interrupts(port);  in asc_transmit_chars()
274 		asc_out(port, ASC_TXBUF, c);  in asc_transmit_chars()
275 		port->icount.tx++;  in asc_transmit_chars()
280 		uart_write_wakeup(port);  in asc_transmit_chars()
283 		asc_disable_tx_interrupts(port);  in asc_transmit_chars()
286 static void asc_receive_chars(struct uart_port *port)  in asc_receive_chars()  argument
288 	struct tty_port *tport = &port->state->port;  in asc_receive_chars()
299 	mode = asc_in(port, ASC_CTL) & ASC_CTL_MODE_MSK;  in asc_receive_chars()
303 	if (irqd_is_wakeup_set(irq_get_irq_data(port->irq)))  in asc_receive_chars()
306 	while ((status = asc_in(port, ASC_STA)) & ASC_STA_RBF) {  in asc_receive_chars()
307 		c = asc_in(port, ASC_RXBUF) | ASC_RXBUF_DUMMY_RX;  in asc_receive_chars()
309 		port->icount.rx++;  in asc_receive_chars()
316 					port->icount.brk++;  in asc_receive_chars()
317 					if (uart_handle_break(port))  in asc_receive_chars()
321 					port->icount.frame++;  in asc_receive_chars()
324 				port->icount.parity++;  in asc_receive_chars()
331 				port->icount.overrun++;  in asc_receive_chars()
335 			c &= port->read_status_mask;  in asc_receive_chars()
345 		if (uart_handle_sysrq_char(port, c & 0xff))  in asc_receive_chars()
348 		uart_insert_char(port, c, ASC_RXBUF_DUMMY_OE, c & 0xff, flag);  in asc_receive_chars()
357 	struct uart_port *port = ptr;  in asc_interrupt()  local
360 	spin_lock(&port->lock);  in asc_interrupt()
362 	status = asc_in(port, ASC_STA);  in asc_interrupt()
366 		asc_receive_chars(port);  in asc_interrupt()
370 	    (asc_in(port, ASC_INTEN) & ASC_INTEN_THE)) {  in asc_interrupt()
372 		asc_transmit_chars(port);  in asc_interrupt()
375 	spin_unlock(&port->lock);  in asc_interrupt()
386 static unsigned int asc_tx_empty(struct uart_port *port)  in asc_tx_empty()  argument
388 	return asc_txfifo_is_empty(port) ? TIOCSER_TEMT : 0;  in asc_tx_empty()
391 static void asc_set_mctrl(struct uart_port *port, unsigned int mctrl)  in asc_set_mctrl()  argument
393 	struct asc_port *ascport = to_asc_port(port);  in asc_set_mctrl()
410 	if (asc_in(port, ASC_CTL) & ASC_CTL_CTSENABLE)  in asc_set_mctrl()
416 static unsigned int asc_get_mctrl(struct uart_port *port)  in asc_get_mctrl()  argument
426 static void asc_start_tx(struct uart_port *port)  in asc_start_tx()  argument
428 	struct circ_buf *xmit = &port->state->xmit;  in asc_start_tx()
431 		asc_enable_tx_interrupts(port);  in asc_start_tx()
435 static void asc_stop_tx(struct uart_port *port)  in asc_stop_tx()  argument
437 	asc_disable_tx_interrupts(port);  in asc_stop_tx()
441 static void asc_stop_rx(struct uart_port *port)  in asc_stop_rx()  argument
443 	asc_disable_rx_interrupts(port);  in asc_stop_rx()
447 static void asc_break_ctl(struct uart_port *port, int break_state)  in asc_break_ctl()  argument
455 static int asc_startup(struct uart_port *port)  in asc_startup()  argument
457 	if (request_irq(port->irq, asc_interrupt, 0,  in asc_startup()
458 			asc_port_name(port), port)) {  in asc_startup()
459 		dev_err(port->dev, "cannot allocate irq.\n");  in asc_startup()
463 	asc_transmit_chars(port);  in asc_startup()
464 	asc_enable_rx_interrupts(port);  in asc_startup()
469 static void asc_shutdown(struct uart_port *port)  in asc_shutdown()  argument
471 	asc_disable_tx_interrupts(port);  in asc_shutdown()
472 	asc_disable_rx_interrupts(port);  in asc_shutdown()
473 	free_irq(port->irq, port);  in asc_shutdown()
476 static void asc_pm(struct uart_port *port, unsigned int state,  in asc_pm()  argument
479 	struct asc_port *ascport = to_asc_port(port);  in asc_pm()
493 		spin_lock_irqsave(&port->lock, flags);  in asc_pm()
494 		ctl = asc_in(port, ASC_CTL) & ~ASC_CTL_RUN;  in asc_pm()
495 		asc_out(port, ASC_CTL, ctl);  in asc_pm()
496 		spin_unlock_irqrestore(&port->lock, flags);  in asc_pm()
502 static void asc_set_termios(struct uart_port *port, struct ktermios *termios,  in asc_set_termios()  argument
505 	struct asc_port *ascport = to_asc_port(port);  in asc_set_termios()
516 	port->uartclk = clk_get_rate(ascport->clk);  in asc_set_termios()
518 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);  in asc_set_termios()
521 	spin_lock_irqsave(&port->lock, flags);  in asc_set_termios()
524 	ctrl_val = asc_in(port, ASC_CTL);  in asc_set_termios()
527 	asc_out(port, ASC_CTL, (ctrl_val & ~ASC_CTL_RUN));  in asc_set_termios()
531 	asc_out(port, ASC_TXRESET, 1);  in asc_set_termios()
532 	asc_out(port, ASC_RXRESET, 1);  in asc_set_termios()
559 			devm_gpiod_put(port->dev, ascport->rts);  in asc_set_termios()
571 			gpiod = devm_gpiod_get(port->dev, "rts", GPIOD_OUT_LOW);  in asc_set_termios()
574 						port->dev->of_node->name);  in asc_set_termios()
581 		asc_out(port, ASC_BAUDRATE, (port->uartclk / (16 * baud)));  in asc_set_termios()
594 		do_div(dividend, port->uartclk / 16);  in asc_set_termios()
595 		asc_out(port, ASC_BAUDRATE, dividend);  in asc_set_termios()
599 	uart_update_timeout(port, cflag, baud);  in asc_set_termios()
601 	ascport->port.read_status_mask = ASC_RXBUF_DUMMY_OE;  in asc_set_termios()
603 		ascport->port.read_status_mask |= ASC_RXBUF_FE | ASC_RXBUF_PE;  in asc_set_termios()
605 		ascport->port.read_status_mask |= ASC_RXBUF_DUMMY_BE;  in asc_set_termios()
610 	ascport->port.ignore_status_mask = 0;  in asc_set_termios()
612 		ascport->port.ignore_status_mask |= ASC_RXBUF_FE | ASC_RXBUF_PE;  in asc_set_termios()
614 		ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_BE;  in asc_set_termios()
620 			ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_OE;  in asc_set_termios()
627 		ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_RX;  in asc_set_termios()
630 	asc_out(port, ASC_TIMEOUT, 20);  in asc_set_termios()
633 	asc_out(port, ASC_CTL, (ctrl_val | ASC_CTL_RUN));  in asc_set_termios()
635 	spin_unlock_irqrestore(&port->lock, flags);  in asc_set_termios()
638 static const char *asc_type(struct uart_port *port)  in asc_type()  argument
640 	return (port->type == PORT_ASC) ? DRIVER_NAME : NULL;  in asc_type()
643 static void asc_release_port(struct uart_port *port)  in asc_release_port()  argument
647 static int asc_request_port(struct uart_port *port)  in asc_request_port()  argument
656 static void asc_config_port(struct uart_port *port, int flags)  in asc_config_port()  argument
659 		port->type = PORT_ASC;  in asc_config_port()
663 asc_verify_port(struct uart_port *port, struct serial_struct *ser)  in asc_verify_port()  argument
675 static int asc_get_poll_char(struct uart_port *port)  in asc_get_poll_char()  argument
677 	if (!(asc_in(port, ASC_STA) & ASC_STA_RBF))  in asc_get_poll_char()
680 	return asc_in(port, ASC_RXBUF);  in asc_get_poll_char()
683 static void asc_put_poll_char(struct uart_port *port, unsigned char c)  in asc_put_poll_char()  argument
685 	while (!asc_txfifo_is_half_empty(port))  in asc_put_poll_char()
687 	asc_out(port, ASC_TXBUF, c);  in asc_put_poll_char()
720 	struct uart_port *port = &ascport->port;  in asc_init_port()  local
724 	port->iotype	= UPIO_MEM;  in asc_init_port()
725 	port->flags	= UPF_BOOT_AUTOCONF;  in asc_init_port()
726 	port->ops	= &asc_uart_ops;  in asc_init_port()
727 	port->fifosize	= ASC_FIFO_SIZE;  in asc_init_port()
728 	port->dev	= &pdev->dev;  in asc_init_port()
729 	port->irq	= platform_get_irq(pdev, 0);  in asc_init_port()
730 	port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_ST_ASC_CONSOLE);  in asc_init_port()
733 	port->membase = devm_ioremap_resource(&pdev->dev, res);  in asc_init_port()
734 	if (IS_ERR(port->membase))  in asc_init_port()
735 		return PTR_ERR(port->membase);  in asc_init_port()
736 	port->mapbase = res->start;  in asc_init_port()
738 	spin_lock_init(&port->lock);  in asc_init_port()
746 	ascport->port.uartclk = clk_get_rate(ascport->clk);  in asc_init_port()
747 	WARN_ON(ascport->port.uartclk == 0);  in asc_init_port()
796 	asc_ports[id].port.line = id;  in asc_of_get_asc_port()
824 	ret = uart_add_one_port(&asc_uart_driver, &ascport->port);  in asc_serial_probe()
828 	platform_set_drvdata(pdev, &ascport->port);  in asc_serial_probe()
835 	struct uart_port *port = platform_get_drvdata(pdev);  in asc_serial_remove()  local
837 	return uart_remove_one_port(&asc_uart_driver, port);  in asc_serial_remove()
843 	struct uart_port *port = dev_get_drvdata(dev);  in asc_serial_suspend()  local
845 	return uart_suspend_port(&asc_uart_driver, port);  in asc_serial_suspend()
850 	struct uart_port *port = dev_get_drvdata(dev);  in asc_serial_resume()  local
852 	return uart_resume_port(&asc_uart_driver, port);  in asc_serial_resume()
860 static void asc_console_putchar(struct uart_port *port, unsigned char ch)  in asc_console_putchar()  argument
865 	while (--timeout && !asc_txfifo_is_half_empty(port))  in asc_console_putchar()
868 	asc_out(port, ASC_TXBUF, ch);  in asc_console_putchar()
878 	struct uart_port *port = &asc_ports[co->index].port;  in asc_console_write()  local
884 	if (port->sysrq)  in asc_console_write()
887 		locked = spin_trylock_irqsave(&port->lock, flags);  in asc_console_write()
889 		spin_lock_irqsave(&port->lock, flags);  in asc_console_write()
895 	intenable = asc_in(port, ASC_INTEN);  in asc_console_write()
896 	asc_out(port, ASC_INTEN, 0);  in asc_console_write()
897 	(void)asc_in(port, ASC_INTEN);	/* Defeat bus write posting */  in asc_console_write()
899 	uart_console_write(port, s, count, asc_console_putchar);  in asc_console_write()
901 	while (--timeout && !asc_txfifo_is_empty(port))  in asc_console_write()
904 	asc_out(port, ASC_INTEN, intenable);  in asc_console_write()
907 		spin_unlock_irqrestore(&port->lock, flags);  in asc_console_write()
929 	if (ascport->port.mapbase == 0 || ascport->port.membase == NULL)  in asc_console_setup()
935 	return uart_set_options(&ascport->port, co, baud, parity, bits, flow);  in asc_console_setup()