40 	struct uart_port port;  member
147 static inline struct asc_port *to_asc_port(struct uart_port *port)  in to_asc_port()  argument
149 	return container_of(port, struct asc_port, port);  in to_asc_port()
152 static inline u32 asc_in(struct uart_port *port, u32 offset)  in asc_in()  argument
155 	return readl_relaxed(port->membase + offset);  in asc_in()
157 	return readl(port->membase + offset);  in asc_in()
161 static inline void asc_out(struct uart_port *port, u32 offset, u32 value)  in asc_out()  argument
164 	writel_relaxed(value, port->membase + offset);  in asc_out()
166 	writel(value, port->membase + offset);  in asc_out()
174 static inline void asc_disable_tx_interrupts(struct uart_port *port)  in asc_disable_tx_interrupts()  argument
176 	u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_THE;  in asc_disable_tx_interrupts()
177 	asc_out(port, ASC_INTEN, intenable);  in asc_disable_tx_interrupts()
178 	(void)asc_in(port, ASC_INTEN);	/* Defeat bus write posting */  in asc_disable_tx_interrupts()
181 static inline void asc_enable_tx_interrupts(struct uart_port *port)  in asc_enable_tx_interrupts()  argument
183 	u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_THE;  in asc_enable_tx_interrupts()
184 	asc_out(port, ASC_INTEN, intenable);  in asc_enable_tx_interrupts()
187 static inline void asc_disable_rx_interrupts(struct uart_port *port)  in asc_disable_rx_interrupts()  argument
189 	u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_RBE;  in asc_disable_rx_interrupts()
190 	asc_out(port, ASC_INTEN, intenable);  in asc_disable_rx_interrupts()
191 	(void)asc_in(port, ASC_INTEN);	/* Defeat bus write posting */  in asc_disable_rx_interrupts()
194 static inline void asc_enable_rx_interrupts(struct uart_port *port)  in asc_enable_rx_interrupts()  argument
196 	u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_RBE;  in asc_enable_rx_interrupts()
197 	asc_out(port, ASC_INTEN, intenable);  in asc_enable_rx_interrupts()
200 static inline u32 asc_txfifo_is_empty(struct uart_port *port)  in asc_txfifo_is_empty()  argument
202 	return asc_in(port, ASC_STA) & ASC_STA_TE;  in asc_txfifo_is_empty()
205 static inline u32 asc_txfifo_is_half_empty(struct uart_port *port)  in asc_txfifo_is_half_empty()  argument
207 	return asc_in(port, ASC_STA) & ASC_STA_THE;  in asc_txfifo_is_half_empty()
210 static inline const char *asc_port_name(struct uart_port *port)  in asc_port_name()  argument
212 	return to_platform_device(port->dev)->name;  in asc_port_name()
222 static inline unsigned asc_hw_txroom(struct uart_port *port)  in asc_hw_txroom()  argument
224 	u32 status = asc_in(port, ASC_STA);  in asc_hw_txroom()
227 		return port->fifosize / 2;  in asc_hw_txroom()
239 static void asc_transmit_chars(struct uart_port *port)  in asc_transmit_chars()  argument
241 	struct circ_buf *xmit = &port->state->xmit;  in asc_transmit_chars()
245 	txroom = asc_hw_txroom(port);  in asc_transmit_chars()
247 	if ((txroom != 0) && port->x_char) {  in asc_transmit_chars()
248 		c = port->x_char;  in asc_transmit_chars()
249 		port->x_char = 0;  in asc_transmit_chars()
250 		asc_out(port, ASC_TXBUF, c);  in asc_transmit_chars()
251 		port->icount.tx++;  in asc_transmit_chars()
252 		txroom = asc_hw_txroom(port);  in asc_transmit_chars()
255 	if (uart_tx_stopped(port)) {  in asc_transmit_chars()
260 		asc_disable_tx_interrupts(port);  in asc_transmit_chars()
265 		asc_disable_tx_interrupts(port);  in asc_transmit_chars()
275 		asc_out(port, ASC_TXBUF, c);  in asc_transmit_chars()
276 		port->icount.tx++;  in asc_transmit_chars()
281 		uart_write_wakeup(port);  in asc_transmit_chars()
284 		asc_disable_tx_interrupts(port);  in asc_transmit_chars()
287 static void asc_receive_chars(struct uart_port *port)  in asc_receive_chars()  argument
289 	struct tty_port *tport = &port->state->port;  in asc_receive_chars()
294 	if (port->irq_wake)  in asc_receive_chars()
297 	while ((status = asc_in(port, ASC_STA)) & ASC_STA_RBF) {  in asc_receive_chars()
298 		c = asc_in(port, ASC_RXBUF) | ASC_RXBUF_DUMMY_RX;  in asc_receive_chars()
300 		port->icount.rx++;  in asc_receive_chars()
307 					port->icount.brk++;  in asc_receive_chars()
308 					if (uart_handle_break(port))  in asc_receive_chars()
312 					port->icount.frame++;  in asc_receive_chars()
315 				port->icount.parity++;  in asc_receive_chars()
322 				port->icount.overrun++;  in asc_receive_chars()
326 			c &= port->read_status_mask;  in asc_receive_chars()
336 		if (uart_handle_sysrq_char(port, c & 0xff))  in asc_receive_chars()
339 		uart_insert_char(port, c, ASC_RXBUF_DUMMY_OE, c & 0xff, flag);  in asc_receive_chars()
348 	struct uart_port *port = ptr;  in asc_interrupt()  local
351 	spin_lock(&port->lock);  in asc_interrupt()
353 	status = asc_in(port, ASC_STA);  in asc_interrupt()
357 		asc_receive_chars(port);  in asc_interrupt()
361 	    (asc_in(port, ASC_INTEN) & ASC_INTEN_THE)) {  in asc_interrupt()
363 		asc_transmit_chars(port);  in asc_interrupt()
366 	spin_unlock(&port->lock);  in asc_interrupt()
377 static unsigned int asc_tx_empty(struct uart_port *port)  in asc_tx_empty()  argument
379 	return asc_txfifo_is_empty(port) ? TIOCSER_TEMT : 0;  in asc_tx_empty()
382 static void asc_set_mctrl(struct uart_port *port, unsigned int mctrl)  in asc_set_mctrl()  argument
392 static unsigned int asc_get_mctrl(struct uart_port *port)  in asc_get_mctrl()  argument
402 static void asc_start_tx(struct uart_port *port)  in asc_start_tx()  argument
404 	struct circ_buf *xmit = &port->state->xmit;  in asc_start_tx()
407 		asc_enable_tx_interrupts(port);  in asc_start_tx()
411 static void asc_stop_tx(struct uart_port *port)  in asc_stop_tx()  argument
413 	asc_disable_tx_interrupts(port);  in asc_stop_tx()
417 static void asc_stop_rx(struct uart_port *port)  in asc_stop_rx()  argument
419 	asc_disable_rx_interrupts(port);  in asc_stop_rx()
423 static void asc_break_ctl(struct uart_port *port, int break_state)  in asc_break_ctl()  argument
431 static int asc_startup(struct uart_port *port)  in asc_startup()  argument
433 	if (request_irq(port->irq, asc_interrupt, IRQF_NO_SUSPEND,  in asc_startup()
434 			asc_port_name(port), port)) {  in asc_startup()
435 		dev_err(port->dev, "cannot allocate irq.\n");  in asc_startup()
439 	asc_transmit_chars(port);  in asc_startup()
440 	asc_enable_rx_interrupts(port);  in asc_startup()
445 static void asc_shutdown(struct uart_port *port)  in asc_shutdown()  argument
447 	asc_disable_tx_interrupts(port);  in asc_shutdown()
448 	asc_disable_rx_interrupts(port);  in asc_shutdown()
449 	free_irq(port->irq, port);  in asc_shutdown()
452 static void asc_pm(struct uart_port *port, unsigned int state,  in asc_pm()  argument
455 	struct asc_port *ascport = to_asc_port(port);  in asc_pm()
469 		spin_lock_irqsave(&port->lock, flags);  in asc_pm()
470 		ctl = asc_in(port, ASC_CTL) & ~ASC_CTL_RUN;  in asc_pm()
471 		asc_out(port, ASC_CTL, ctl);  in asc_pm()
472 		spin_unlock_irqrestore(&port->lock, flags);  in asc_pm()
478 static void asc_set_termios(struct uart_port *port, struct ktermios *termios,  in asc_set_termios()  argument
481 	struct asc_port *ascport = to_asc_port(port);  in asc_set_termios()
491 	port->uartclk = clk_get_rate(ascport->clk);  in asc_set_termios()
493 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);  in asc_set_termios()
496 	spin_lock_irqsave(&port->lock, flags);  in asc_set_termios()
499 	ctrl_val = asc_in(port, ASC_CTL);  in asc_set_termios()
502 	asc_out(port, ASC_CTL, (ctrl_val & ~ASC_CTL_RUN));  in asc_set_termios()
506 	asc_out(port, ASC_TXRESET, 1);  in asc_set_termios()
507 	asc_out(port, ASC_RXRESET, 1);  in asc_set_termios()
529 		asc_out(port, ASC_BAUDRATE, (port->uartclk / (16 * baud)));  in asc_set_termios()
542 		do_div(dividend, port->uartclk / 16);  in asc_set_termios()
543 		asc_out(port, ASC_BAUDRATE, dividend);  in asc_set_termios()
547 	uart_update_timeout(port, cflag, baud);  in asc_set_termios()
549 	ascport->port.read_status_mask = ASC_RXBUF_DUMMY_OE;  in asc_set_termios()
551 		ascport->port.read_status_mask |= ASC_RXBUF_FE | ASC_RXBUF_PE;  in asc_set_termios()
553 		ascport->port.read_status_mask |= ASC_RXBUF_DUMMY_BE;  in asc_set_termios()
558 	ascport->port.ignore_status_mask = 0;  in asc_set_termios()
560 		ascport->port.ignore_status_mask |= ASC_RXBUF_FE | ASC_RXBUF_PE;  in asc_set_termios()
562 		ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_BE;  in asc_set_termios()
568 			ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_OE;  in asc_set_termios()
575 		ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_RX;  in asc_set_termios()
578 	asc_out(port, ASC_TIMEOUT, 20);  in asc_set_termios()
581 	asc_out(port, ASC_CTL, (ctrl_val | ASC_CTL_RUN));  in asc_set_termios()
583 	spin_unlock_irqrestore(&port->lock, flags);  in asc_set_termios()
586 static const char *asc_type(struct uart_port *port)  in asc_type()  argument
588 	return (port->type == PORT_ASC) ? DRIVER_NAME : NULL;  in asc_type()
591 static void asc_release_port(struct uart_port *port)  in asc_release_port()  argument
595 static int asc_request_port(struct uart_port *port)  in asc_request_port()  argument
604 static void asc_config_port(struct uart_port *port, int flags)  in asc_config_port()  argument
607 		port->type = PORT_ASC;  in asc_config_port()
611 asc_verify_port(struct uart_port *port, struct serial_struct *ser)  in asc_verify_port()  argument
623 static int asc_get_poll_char(struct uart_port *port)  in asc_get_poll_char()  argument
625 	if (!(asc_in(port, ASC_STA) & ASC_STA_RBF))  in asc_get_poll_char()
628 	return asc_in(port, ASC_RXBUF);  in asc_get_poll_char()
631 static void asc_put_poll_char(struct uart_port *port, unsigned char c)  in asc_put_poll_char()  argument
633 	while (!asc_txfifo_is_half_empty(port))  in asc_put_poll_char()
635 	asc_out(port, ASC_TXBUF, c);  in asc_put_poll_char()
668 	struct uart_port *port = &ascport->port;  in asc_init_port()  local
671 	port->iotype	= UPIO_MEM;  in asc_init_port()
672 	port->flags	= UPF_BOOT_AUTOCONF;  in asc_init_port()
673 	port->ops	= &asc_uart_ops;  in asc_init_port()
674 	port->fifosize	= ASC_FIFO_SIZE;  in asc_init_port()
675 	port->dev	= &pdev->dev;  in asc_init_port()
676 	port->irq	= platform_get_irq(pdev, 0);  in asc_init_port()
679 	port->membase = devm_ioremap_resource(&pdev->dev, res);  in asc_init_port()
680 	if (IS_ERR(port->membase))  in asc_init_port()
681 		return PTR_ERR(port->membase);  in asc_init_port()
682 	port->mapbase = res->start;  in asc_init_port()
684 	spin_lock_init(&port->lock);  in asc_init_port()
692 	ascport->port.uartclk = clk_get_rate(ascport->clk);  in asc_init_port()
693 	WARN_ON(ascport->port.uartclk == 0);  in asc_init_port()
718 	asc_ports[id].port.line = id;  in asc_of_get_asc_port()
744 	ret = uart_add_one_port(&asc_uart_driver, &ascport->port);  in asc_serial_probe()
748 	platform_set_drvdata(pdev, &ascport->port);  in asc_serial_probe()
755 	struct uart_port *port = platform_get_drvdata(pdev);  in asc_serial_remove()  local
757 	return uart_remove_one_port(&asc_uart_driver, port);  in asc_serial_remove()
764 	struct uart_port *port = platform_get_drvdata(pdev);  in asc_serial_suspend()  local
766 	return uart_suspend_port(&asc_uart_driver, port);  in asc_serial_suspend()
772 	struct uart_port *port = platform_get_drvdata(pdev);  in asc_serial_resume()  local
774 	return uart_resume_port(&asc_uart_driver, port);  in asc_serial_resume()
782 static void asc_console_putchar(struct uart_port *port, int ch)  in asc_console_putchar()  argument
787 	while (--timeout && !asc_txfifo_is_half_empty(port))  in asc_console_putchar()
790 	asc_out(port, ASC_TXBUF, ch);  in asc_console_putchar()
800 	struct uart_port *port = &asc_ports[co->index].port;  in asc_console_write()  local
807 	if (port->sysrq)  in asc_console_write()
810 		locked = spin_trylock(&port->lock);  in asc_console_write()
812 		spin_lock(&port->lock);  in asc_console_write()
818 	intenable = asc_in(port, ASC_INTEN);  in asc_console_write()
819 	asc_out(port, ASC_INTEN, 0);  in asc_console_write()
820 	(void)asc_in(port, ASC_INTEN);	/* Defeat bus write posting */  in asc_console_write()
822 	uart_console_write(port, s, count, asc_console_putchar);  in asc_console_write()
824 	while (--timeout && !asc_txfifo_is_empty(port))  in asc_console_write()
827 	asc_out(port, ASC_INTEN, intenable);  in asc_console_write()
830 		spin_unlock(&port->lock);  in asc_console_write()
853 	if (ascport->port.mapbase == 0 || ascport->port.membase == NULL)  in asc_console_setup()
859 	return uart_set_options(&ascport->port, co, baud, parity, bits, flow);  in asc_console_setup()