77 static inline unsigned int bcm_uart_readl(struct uart_port *port,  in bcm_uart_readl()  argument
80 	return __raw_readl(port->membase + offset);  in bcm_uart_readl()
83 static inline void bcm_uart_writel(struct uart_port *port,  in bcm_uart_writel()  argument
86 	__raw_writel(value, port->membase + offset);  in bcm_uart_writel()
92 static unsigned int bcm_uart_tx_empty(struct uart_port *port)  in bcm_uart_tx_empty()  argument
96 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_tx_empty()
103 static void bcm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in bcm_uart_set_mctrl()  argument
107 	val = bcm_uart_readl(port, UART_MCTL_REG);  in bcm_uart_set_mctrl()
114 	bcm_uart_writel(port, val, UART_MCTL_REG);  in bcm_uart_set_mctrl()
116 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_set_mctrl()
121 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_set_mctrl()
127 static unsigned int bcm_uart_get_mctrl(struct uart_port *port)  in bcm_uart_get_mctrl()  argument
132 	val = bcm_uart_readl(port, UART_EXTINP_REG);  in bcm_uart_get_mctrl()
147 static void bcm_uart_stop_tx(struct uart_port *port)  in bcm_uart_stop_tx()  argument
151 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_stop_tx()
153 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_stop_tx()
155 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_stop_tx()
157 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_stop_tx()
163 static void bcm_uart_start_tx(struct uart_port *port)  in bcm_uart_start_tx()  argument
167 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_start_tx()
169 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_start_tx()
171 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_start_tx()
173 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_start_tx()
177  * serial core request to stop rx, called before port shutdown
179 static void bcm_uart_stop_rx(struct uart_port *port)  in bcm_uart_stop_rx()  argument
183 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_stop_rx()
185 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_stop_rx()
191 static void bcm_uart_enable_ms(struct uart_port *port)  in bcm_uart_enable_ms()  argument
195 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_enable_ms()
197 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_enable_ms()
203 static void bcm_uart_break_ctl(struct uart_port *port, int ctl)  in bcm_uart_break_ctl()  argument
208 	spin_lock_irqsave(&port->lock, flags);  in bcm_uart_break_ctl()
210 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_break_ctl()
215 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_break_ctl()
217 	spin_unlock_irqrestore(&port->lock, flags);  in bcm_uart_break_ctl()
221  * return port type in string format
223 static const char *bcm_uart_type(struct uart_port *port)  in bcm_uart_type()  argument
225 	return (port->type == PORT_BCM63XX) ? "bcm63xx_uart" : NULL;  in bcm_uart_type()
231 static void bcm_uart_do_rx(struct uart_port *port)  in bcm_uart_do_rx()  argument
233 	struct tty_port *tty_port = &port->state->port;  in bcm_uart_do_rx()
238 	 * serial port */  in bcm_uart_do_rx()
246 		iestat = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_do_rx()
253 			val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_do_rx()
255 			bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_do_rx()
257 			port->icount.overrun++;  in bcm_uart_do_rx()
264 		cstat = c = bcm_uart_readl(port, UART_FIFO_REG);  in bcm_uart_do_rx()
265 		port->icount.rx++;  in bcm_uart_do_rx()
272 				port->icount.brk++;  in bcm_uart_do_rx()
273 				if (uart_handle_break(port))  in bcm_uart_do_rx()
278 				port->icount.parity++;  in bcm_uart_do_rx()
280 				port->icount.frame++;  in bcm_uart_do_rx()
283 			cstat &= port->read_status_mask;  in bcm_uart_do_rx()
292 		if (uart_handle_sysrq_char(port, c))  in bcm_uart_do_rx()
296 		if ((cstat & port->ignore_status_mask) == 0)  in bcm_uart_do_rx()
301 	spin_unlock(&port->lock);  in bcm_uart_do_rx()
303 	spin_lock(&port->lock);  in bcm_uart_do_rx()
310 static void bcm_uart_do_tx(struct uart_port *port)  in bcm_uart_do_tx()  argument
315 	if (port->x_char) {  in bcm_uart_do_tx()
316 		bcm_uart_writel(port, port->x_char, UART_FIFO_REG);  in bcm_uart_do_tx()
317 		port->icount.tx++;  in bcm_uart_do_tx()
318 		port->x_char = 0;  in bcm_uart_do_tx()
322 	if (uart_tx_stopped(port)) {  in bcm_uart_do_tx()
323 		bcm_uart_stop_tx(port);  in bcm_uart_do_tx()
327 	xmit = &port->state->xmit;  in bcm_uart_do_tx()
331 	val = bcm_uart_readl(port, UART_MCTL_REG);  in bcm_uart_do_tx()
333 	max_count = port->fifosize - val;  in bcm_uart_do_tx()
339 		bcm_uart_writel(port, c, UART_FIFO_REG);  in bcm_uart_do_tx()
341 		port->icount.tx++;  in bcm_uart_do_tx()
347 		uart_write_wakeup(port);  in bcm_uart_do_tx()
355 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_do_tx()
357 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_do_tx()
366 	struct uart_port *port;  in bcm_uart_interrupt()  local
369 	port = dev_id;  in bcm_uart_interrupt()
370 	spin_lock(&port->lock);  in bcm_uart_interrupt()
372 	irqstat = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_interrupt()
374 		bcm_uart_do_rx(port);  in bcm_uart_interrupt()
377 		bcm_uart_do_tx(port);  in bcm_uart_interrupt()
382 		estat = bcm_uart_readl(port, UART_EXTINP_REG);  in bcm_uart_interrupt()
384 			uart_handle_cts_change(port,  in bcm_uart_interrupt()
387 			uart_handle_dcd_change(port,  in bcm_uart_interrupt()
391 	spin_unlock(&port->lock);  in bcm_uart_interrupt()
398 static void bcm_uart_enable(struct uart_port *port)  in bcm_uart_enable()  argument
402 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_enable()
404 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_enable()
410 static void bcm_uart_disable(struct uart_port *port)  in bcm_uart_disable()  argument
414 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_disable()
417 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_disable()
423 static void bcm_uart_flush(struct uart_port *port)  in bcm_uart_flush()  argument
428 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_flush()
430 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_flush()
434 	(void)bcm_uart_readl(port, UART_FIFO_REG);  in bcm_uart_flush()
440 static int bcm_uart_startup(struct uart_port *port)  in bcm_uart_startup()  argument
445 	/* mask all irq and flush port */  in bcm_uart_startup()
446 	bcm_uart_disable(port);  in bcm_uart_startup()
447 	bcm_uart_writel(port, 0, UART_IR_REG);  in bcm_uart_startup()
448 	bcm_uart_flush(port);  in bcm_uart_startup()
451 	(void)bcm_uart_readl(port, UART_EXTINP_REG);  in bcm_uart_startup()
454 	val = bcm_uart_readl(port, UART_MCTL_REG);  in bcm_uart_startup()
456 	val |= (port->fifosize / 2) << UART_MCTL_RXFIFOTHRESH_SHIFT;  in bcm_uart_startup()
457 	val |= (port->fifosize / 2) << UART_MCTL_TXFIFOTHRESH_SHIFT;  in bcm_uart_startup()
458 	bcm_uart_writel(port, val, UART_MCTL_REG);  in bcm_uart_startup()
461 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_startup()
464 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_startup()
470 	bcm_uart_writel(port, val, UART_EXTINP_REG);  in bcm_uart_startup()
473 	ret = request_irq(port->irq, bcm_uart_interrupt, 0,  in bcm_uart_startup()
474 			  dev_name(port->dev), port);  in bcm_uart_startup()
477 	bcm_uart_writel(port, UART_RX_INT_MASK, UART_IR_REG);  in bcm_uart_startup()
478 	bcm_uart_enable(port);  in bcm_uart_startup()
485 static void bcm_uart_shutdown(struct uart_port *port)  in bcm_uart_shutdown()  argument
489 	spin_lock_irqsave(&port->lock, flags);  in bcm_uart_shutdown()
490 	bcm_uart_writel(port, 0, UART_IR_REG);  in bcm_uart_shutdown()
491 	spin_unlock_irqrestore(&port->lock, flags);  in bcm_uart_shutdown()
493 	bcm_uart_disable(port);  in bcm_uart_shutdown()
494 	bcm_uart_flush(port);  in bcm_uart_shutdown()
495 	free_irq(port->irq, port);  in bcm_uart_shutdown()
501 static void bcm_uart_set_termios(struct uart_port *port,  in bcm_uart_set_termios()  argument
509 	spin_lock_irqsave(&port->lock, flags);  in bcm_uart_set_termios()
512 	for (tries = 3; !bcm_uart_tx_empty(port) && tries; tries--)  in bcm_uart_set_termios()
516 	bcm_uart_disable(port);  in bcm_uart_set_termios()
517 	bcm_uart_flush(port);  in bcm_uart_set_termios()
520 	ctl = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_set_termios()
550 	bcm_uart_writel(port, ctl, UART_CTL_REG);  in bcm_uart_set_termios()
553 	baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);  in bcm_uart_set_termios()
554 	quot = uart_get_divisor(port, baud) - 1;  in bcm_uart_set_termios()
555 	bcm_uart_writel(port, quot, UART_BAUD_REG);  in bcm_uart_set_termios()
558 	ier = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_set_termios()
561 	if (UART_ENABLE_MS(port, new->c_cflag))  in bcm_uart_set_termios()
564 	bcm_uart_writel(port, ier, UART_IR_REG);  in bcm_uart_set_termios()
567 	port->read_status_mask = UART_FIFO_VALID_MASK;  in bcm_uart_set_termios()
569 		port->read_status_mask |= UART_FIFO_FRAMEERR_MASK;  in bcm_uart_set_termios()
570 		port->read_status_mask |= UART_FIFO_PARERR_MASK;  in bcm_uart_set_termios()
573 		port->read_status_mask |= UART_FIFO_BRKDET_MASK;  in bcm_uart_set_termios()
575 	port->ignore_status_mask = 0;  in bcm_uart_set_termios()
577 		port->ignore_status_mask |= UART_FIFO_PARERR_MASK;  in bcm_uart_set_termios()
579 		port->ignore_status_mask |= UART_FIFO_BRKDET_MASK;  in bcm_uart_set_termios()
581 		port->ignore_status_mask |= UART_FIFO_VALID_MASK;  in bcm_uart_set_termios()
583 	uart_update_timeout(port, new->c_cflag, baud);  in bcm_uart_set_termios()
584 	bcm_uart_enable(port);  in bcm_uart_set_termios()
585 	spin_unlock_irqrestore(&port->lock, flags);  in bcm_uart_set_termios()
591 static int bcm_uart_request_port(struct uart_port *port)  in bcm_uart_request_port()  argument
600 static void bcm_uart_release_port(struct uart_port *port)  in bcm_uart_release_port()  argument
606  * serial core request to do any port required autoconfiguration
608 static void bcm_uart_config_port(struct uart_port *port, int flags)  in bcm_uart_config_port()  argument
611 		if (bcm_uart_request_port(port))  in bcm_uart_config_port()
613 		port->type = PORT_BCM63XX;  in bcm_uart_config_port()
618  * serial core request to check that port information in serinfo are
621 static int bcm_uart_verify_port(struct uart_port *port,  in bcm_uart_verify_port()  argument
624 	if (port->type != PORT_BCM63XX)  in bcm_uart_verify_port()
626 	if (port->irq != serinfo->irq)  in bcm_uart_verify_port()
628 	if (port->iotype != serinfo->io_type)  in bcm_uart_verify_port()
630 	if (port->mapbase != (unsigned long)serinfo->iomem_base)  in bcm_uart_verify_port()
658 static void wait_for_xmitr(struct uart_port *port)  in wait_for_xmitr()  argument
667 		val = bcm_uart_readl(port, UART_IR_REG);  in wait_for_xmitr()
674 	if (port->flags & UPF_CONS_FLOW) {  in wait_for_xmitr()
679 			val = bcm_uart_readl(port, UART_EXTINP_REG);  in wait_for_xmitr()
690 static void bcm_console_putchar(struct uart_port *port, int ch)  in bcm_console_putchar()  argument
692 	wait_for_xmitr(port);  in bcm_console_putchar()
693 	bcm_uart_writel(port, ch, UART_FIFO_REG);  in bcm_console_putchar()
702 	struct uart_port *port;  in bcm_console_write()  local
706 	port = &ports[co->index];  in bcm_console_write()
709 	if (port->sysrq) {  in bcm_console_write()
713 		locked = spin_trylock(&port->lock);  in bcm_console_write()
715 		spin_lock(&port->lock);  in bcm_console_write()
720 	uart_console_write(port, s, count, bcm_console_putchar);  in bcm_console_write()
723 	wait_for_xmitr(port);  in bcm_console_write()
726 		spin_unlock(&port->lock);  in bcm_console_write()
732  * port and setup it.
736 	struct uart_port *port;  in bcm_console_setup()  local
744 	port = &ports[co->index];  in bcm_console_setup()
745 	if (!port->membase)  in bcm_console_setup()
750 	return uart_set_options(port, co, baud, parity, bits, flow);  in bcm_console_setup()
777 	uart_console_write(&dev->port, s, n, bcm_console_putchar);  in bcm_early_write()
778 	wait_for_xmitr(&dev->port);  in bcm_early_write()
784 	if (!device->port.membase)  in bcm_early_console_setup()
814 	struct uart_port *port;  in bcm_uart_probe()  local
828 	port = &ports[pdev->id];  in bcm_uart_probe()
829 	if (port->membase)  in bcm_uart_probe()
831 	memset(port, 0, sizeof(*port));  in bcm_uart_probe()
837 	port->mapbase = res_mem->start;  in bcm_uart_probe()
838 	port->membase = devm_ioremap_resource(&pdev->dev, res_mem);  in bcm_uart_probe()
839 	if (IS_ERR(port->membase))  in bcm_uart_probe()
840 		return PTR_ERR(port->membase);  in bcm_uart_probe()
853 	port->iotype = UPIO_MEM;  in bcm_uart_probe()
854 	port->irq = res_irq->start;  in bcm_uart_probe()
855 	port->ops = &bcm_uart_ops;  in bcm_uart_probe()
856 	port->flags = UPF_BOOT_AUTOCONF;  in bcm_uart_probe()
857 	port->dev = &pdev->dev;  in bcm_uart_probe()
858 	port->fifosize = 16;  in bcm_uart_probe()
859 	port->uartclk = clk_get_rate(clk) / 2;  in bcm_uart_probe()
860 	port->line = pdev->id;  in bcm_uart_probe()
863 	ret = uart_add_one_port(&bcm_uart_driver, port);  in bcm_uart_probe()
868 	platform_set_drvdata(pdev, port);  in bcm_uart_probe()
874 	struct uart_port *port;  in bcm_uart_remove()  local
876 	port = platform_get_drvdata(pdev);  in bcm_uart_remove()
877 	uart_remove_one_port(&bcm_uart_driver, port);  in bcm_uart_remove()
878 	/* mark port as free */  in bcm_uart_remove()