82 static inline unsigned int bcm_uart_readl(struct uart_port *port,  in bcm_uart_readl()  argument
85 	return bcm_readl(port->membase + offset);  in bcm_uart_readl()
88 static inline void bcm_uart_writel(struct uart_port *port,  in bcm_uart_writel()  argument
91 	bcm_writel(value, port->membase + offset);  in bcm_uart_writel()
97 static unsigned int bcm_uart_tx_empty(struct uart_port *port)  in bcm_uart_tx_empty()  argument
101 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_tx_empty()
108 static void bcm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in bcm_uart_set_mctrl()  argument
112 	val = bcm_uart_readl(port, UART_MCTL_REG);  in bcm_uart_set_mctrl()
119 	bcm_uart_writel(port, val, UART_MCTL_REG);  in bcm_uart_set_mctrl()
121 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_set_mctrl()
126 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_set_mctrl()
132 static unsigned int bcm_uart_get_mctrl(struct uart_port *port)  in bcm_uart_get_mctrl()  argument
137 	val = bcm_uart_readl(port, UART_EXTINP_REG);  in bcm_uart_get_mctrl()
152 static void bcm_uart_stop_tx(struct uart_port *port)  in bcm_uart_stop_tx()  argument
156 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_stop_tx()
158 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_stop_tx()
160 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_stop_tx()
162 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_stop_tx()
168 static void bcm_uart_start_tx(struct uart_port *port)  in bcm_uart_start_tx()  argument
172 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_start_tx()
174 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_start_tx()
176 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_start_tx()
178 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_start_tx()
182  * serial core request to stop rx, called before port shutdown
184 static void bcm_uart_stop_rx(struct uart_port *port)  in bcm_uart_stop_rx()  argument
188 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_stop_rx()
190 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_stop_rx()
196 static void bcm_uart_enable_ms(struct uart_port *port)  in bcm_uart_enable_ms()  argument
200 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_enable_ms()
202 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_enable_ms()
208 static void bcm_uart_break_ctl(struct uart_port *port, int ctl)  in bcm_uart_break_ctl()  argument
213 	spin_lock_irqsave(&port->lock, flags);  in bcm_uart_break_ctl()
215 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_break_ctl()
220 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_break_ctl()
222 	spin_unlock_irqrestore(&port->lock, flags);  in bcm_uart_break_ctl()
226  * return port type in string format
228 static const char *bcm_uart_type(struct uart_port *port)  in bcm_uart_type()  argument
230 	return (port->type == PORT_BCM63XX) ? "bcm63xx_uart" : NULL;  in bcm_uart_type()
236 static void bcm_uart_do_rx(struct uart_port *port)  in bcm_uart_do_rx()  argument
243 	 * serial port */  in bcm_uart_do_rx()
245 	tty = port->state->port.tty;  in bcm_uart_do_rx()
252 		iestat = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_do_rx()
259 			val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_do_rx()
261 			bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_do_rx()
263 			port->icount.overrun++;  in bcm_uart_do_rx()
270 		cstat = c = bcm_uart_readl(port, UART_FIFO_REG);  in bcm_uart_do_rx()
271 		port->icount.rx++;  in bcm_uart_do_rx()
278 				port->icount.brk++;  in bcm_uart_do_rx()
279 				if (uart_handle_break(port))  in bcm_uart_do_rx()
284 				port->icount.parity++;  in bcm_uart_do_rx()
286 				port->icount.frame++;  in bcm_uart_do_rx()
289 			cstat &= port->read_status_mask;  in bcm_uart_do_rx()
298 		if (uart_handle_sysrq_char(port, c))  in bcm_uart_do_rx()
302 		if ((cstat & port->ignore_status_mask) == 0)  in bcm_uart_do_rx()
314 static void bcm_uart_do_tx(struct uart_port *port)  in bcm_uart_do_tx()  argument
319 	if (port->x_char) {  in bcm_uart_do_tx()
320 		bcm_uart_writel(port, port->x_char, UART_FIFO_REG);  in bcm_uart_do_tx()
321 		port->icount.tx++;  in bcm_uart_do_tx()
322 		port->x_char = 0;  in bcm_uart_do_tx()
326 	if (uart_tx_stopped(port)) {  in bcm_uart_do_tx()
327 		bcm_uart_stop_tx(port);  in bcm_uart_do_tx()
331 	xmit = &port->state->xmit;  in bcm_uart_do_tx()
335 	val = bcm_uart_readl(port, UART_MCTL_REG);  in bcm_uart_do_tx()
337 	max_count = port->fifosize - val;  in bcm_uart_do_tx()
343 		bcm_uart_writel(port, c, UART_FIFO_REG);  in bcm_uart_do_tx()
345 		port->icount.tx++;  in bcm_uart_do_tx()
351 		uart_write_wakeup(port);  in bcm_uart_do_tx()
359 	val = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_do_tx()
361 	bcm_uart_writel(port, val, UART_IR_REG);  in bcm_uart_do_tx()
370 	struct uart_port *port;  in bcm_uart_interrupt()  local
373 	port = dev_id;  in bcm_uart_interrupt()
374 	spin_lock(&port->lock);  in bcm_uart_interrupt()
376 	irqstat = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_interrupt()
378 		bcm_uart_do_rx(port);  in bcm_uart_interrupt()
381 		bcm_uart_do_tx(port);  in bcm_uart_interrupt()
386 		estat = bcm_uart_readl(port, UART_EXTINP_REG);  in bcm_uart_interrupt()
388 			uart_handle_cts_change(port,  in bcm_uart_interrupt()
391 			uart_handle_dcd_change(port,  in bcm_uart_interrupt()
395 	spin_unlock(&port->lock);  in bcm_uart_interrupt()
402 static void bcm_uart_enable(struct uart_port *port)  in bcm_uart_enable()  argument
406 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_enable()
408 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_enable()
414 static void bcm_uart_disable(struct uart_port *port)  in bcm_uart_disable()  argument
418 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_disable()
421 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_disable()
427 static void bcm_uart_flush(struct uart_port *port)  in bcm_uart_flush()  argument
432 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_flush()
434 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_flush()
438 	(void)bcm_uart_readl(port, UART_FIFO_REG);  in bcm_uart_flush()
444 static int bcm_uart_startup(struct uart_port *port)  in bcm_uart_startup()  argument
449 	/* mask all irq and flush port */  in bcm_uart_startup()
450 	bcm_uart_disable(port);  in bcm_uart_startup()
451 	bcm_uart_writel(port, 0, UART_IR_REG);  in bcm_uart_startup()
452 	bcm_uart_flush(port);  in bcm_uart_startup()
455 	(void)bcm_uart_readl(port, UART_EXTINP_REG);  in bcm_uart_startup()
458 	val = bcm_uart_readl(port, UART_MCTL_REG);  in bcm_uart_startup()
460 	val |= (port->fifosize / 2) << UART_MCTL_RXFIFOTHRESH_SHIFT;  in bcm_uart_startup()
461 	val |= (port->fifosize / 2) << UART_MCTL_TXFIFOTHRESH_SHIFT;  in bcm_uart_startup()
462 	bcm_uart_writel(port, val, UART_MCTL_REG);  in bcm_uart_startup()
465 	val = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_startup()
468 	bcm_uart_writel(port, val, UART_CTL_REG);  in bcm_uart_startup()
474 	bcm_uart_writel(port, val, UART_EXTINP_REG);  in bcm_uart_startup()
477 	ret = request_irq(port->irq, bcm_uart_interrupt, 0,  in bcm_uart_startup()
478 			  bcm_uart_type(port), port);  in bcm_uart_startup()
481 	bcm_uart_writel(port, UART_RX_INT_MASK, UART_IR_REG);  in bcm_uart_startup()
482 	bcm_uart_enable(port);  in bcm_uart_startup()
489 static void bcm_uart_shutdown(struct uart_port *port)  in bcm_uart_shutdown()  argument
493 	spin_lock_irqsave(&port->lock, flags);  in bcm_uart_shutdown()
494 	bcm_uart_writel(port, 0, UART_IR_REG);  in bcm_uart_shutdown()
495 	spin_unlock_irqrestore(&port->lock, flags);  in bcm_uart_shutdown()
497 	bcm_uart_disable(port);  in bcm_uart_shutdown()
498 	bcm_uart_flush(port);  in bcm_uart_shutdown()
499 	free_irq(port->irq, port);  in bcm_uart_shutdown()
505 static void bcm_uart_set_termios(struct uart_port *port,  in bcm_uart_set_termios()  argument
512 	spin_lock_irqsave(&port->lock, flags);  in bcm_uart_set_termios()
515 	bcm_uart_disable(port);  in bcm_uart_set_termios()
516 	bcm_uart_flush(port);  in bcm_uart_set_termios()
519 	ctl = bcm_uart_readl(port, UART_CTL_REG);  in bcm_uart_set_termios()
549 	bcm_uart_writel(port, ctl, UART_CTL_REG);  in bcm_uart_set_termios()
552 	baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);  in bcm_uart_set_termios()
553 	quot = uart_get_divisor(port, baud) - 1;  in bcm_uart_set_termios()
554 	bcm_uart_writel(port, quot, UART_BAUD_REG);  in bcm_uart_set_termios()
557 	ier = bcm_uart_readl(port, UART_IR_REG);  in bcm_uart_set_termios()
560 	if (UART_ENABLE_MS(port, new->c_cflag))  in bcm_uart_set_termios()
563 	bcm_uart_writel(port, ier, UART_IR_REG);  in bcm_uart_set_termios()
566 	port->read_status_mask = UART_FIFO_VALID_MASK;  in bcm_uart_set_termios()
568 		port->read_status_mask |= UART_FIFO_FRAMEERR_MASK;  in bcm_uart_set_termios()
569 		port->read_status_mask |= UART_FIFO_PARERR_MASK;  in bcm_uart_set_termios()
572 		port->read_status_mask |= UART_FIFO_BRKDET_MASK;  in bcm_uart_set_termios()
574 	port->ignore_status_mask = 0;  in bcm_uart_set_termios()
576 		port->ignore_status_mask |= UART_FIFO_PARERR_MASK;  in bcm_uart_set_termios()
578 		port->ignore_status_mask |= UART_FIFO_BRKDET_MASK;  in bcm_uart_set_termios()
580 		port->ignore_status_mask |= UART_FIFO_VALID_MASK;  in bcm_uart_set_termios()
582 	uart_update_timeout(port, new->c_cflag, baud);  in bcm_uart_set_termios()
583 	bcm_uart_enable(port);  in bcm_uart_set_termios()
584 	spin_unlock_irqrestore(&port->lock, flags);  in bcm_uart_set_termios()
590 static int bcm_uart_request_port(struct uart_port *port)  in bcm_uart_request_port()  argument
595 	if (!request_mem_region(port->mapbase, size, "bcm63xx")) {  in bcm_uart_request_port()
596 		dev_err(port->dev, "Memory region busy\n");  in bcm_uart_request_port()
600 	port->membase = ioremap(port->mapbase, size);  in bcm_uart_request_port()
601 	if (!port->membase) {  in bcm_uart_request_port()
602 		dev_err(port->dev, "Unable to map registers\n");  in bcm_uart_request_port()
603 		release_mem_region(port->mapbase, size);  in bcm_uart_request_port()
612 static void bcm_uart_release_port(struct uart_port *port)  in bcm_uart_release_port()  argument
614 	release_mem_region(port->mapbase, RSET_UART_SIZE);  in bcm_uart_release_port()
615 	iounmap(port->membase);  in bcm_uart_release_port()
619  * serial core request to do any port required autoconfiguration
621 static void bcm_uart_config_port(struct uart_port *port, int flags)  in bcm_uart_config_port()  argument
624 		if (bcm_uart_request_port(port))  in bcm_uart_config_port()
626 		port->type = PORT_BCM63XX;  in bcm_uart_config_port()
631  * serial core request to check that port information in serinfo are
634 static int bcm_uart_verify_port(struct uart_port *port,  in bcm_uart_verify_port()  argument
637 	if (port->type != PORT_BCM63XX)  in bcm_uart_verify_port()
639 	if (port->irq != serinfo->irq)  in bcm_uart_verify_port()
641 	if (port->iotype != serinfo->io_type)  in bcm_uart_verify_port()
643 	if (port->mapbase != (unsigned long)serinfo->iomem_base)  in bcm_uart_verify_port()
671 static inline void wait_for_xmitr(struct uart_port *port)  in wait_for_xmitr()  argument
680 		val = bcm_uart_readl(port, UART_IR_REG);  in wait_for_xmitr()
687 	if (port->flags & UPF_CONS_FLOW) {  in wait_for_xmitr()
692 			val = bcm_uart_readl(port, UART_EXTINP_REG);  in wait_for_xmitr()
703 static void bcm_console_putchar(struct uart_port *port, int ch)  in bcm_console_putchar()  argument
705 	wait_for_xmitr(port);  in bcm_console_putchar()
706 	bcm_uart_writel(port, ch, UART_FIFO_REG);  in bcm_console_putchar()
715 	struct uart_port *port;  in bcm_console_write()  local
719 	port = &ports[co->index];  in bcm_console_write()
722 	if (port->sysrq) {  in bcm_console_write()
726 		locked = spin_trylock(&port->lock);  in bcm_console_write()
728 		spin_lock(&port->lock);  in bcm_console_write()
733 	uart_console_write(port, s, count, bcm_console_putchar);  in bcm_console_write()
736 	wait_for_xmitr(port);  in bcm_console_write()
739 		spin_unlock(&port->lock);  in bcm_console_write()
745  * port and setup it.
749 	struct uart_port *port;  in bcm_console_setup()  local
757 	port = &ports[co->index];  in bcm_console_setup()
758 	if (!port->membase)  in bcm_console_setup()
763 	return uart_set_options(port, co, baud, parity, bits, flow);  in bcm_console_setup()
807 	struct uart_port *port;  in bcm_uart_probe()  local
829 	port = &ports[pdev->id];  in bcm_uart_probe()
830 	memset(port, 0, sizeof(*port));  in bcm_uart_probe()
831 	port->iotype = UPIO_MEM;  in bcm_uart_probe()
832 	port->mapbase = res_mem->start;  in bcm_uart_probe()
833 	port->irq = res_irq->start;  in bcm_uart_probe()
834 	port->ops = &bcm_uart_ops;  in bcm_uart_probe()
835 	port->flags = UPF_BOOT_AUTOCONF;  in bcm_uart_probe()
836 	port->dev = &pdev->dev;  in bcm_uart_probe()
837 	port->fifosize = 16;  in bcm_uart_probe()
838 	port->uartclk = clk_get_rate(clk) / 2;  in bcm_uart_probe()
839 	port->line = pdev->id;  in bcm_uart_probe()
842 	ret = uart_add_one_port(&bcm_uart_driver, port);  in bcm_uart_probe()
847 	platform_set_drvdata(pdev, port);  in bcm_uart_probe()
853 	struct uart_port *port;  in bcm_uart_remove()  local
855 	port = platform_get_drvdata(pdev);  in bcm_uart_remove()
856 	uart_remove_one_port(&bcm_uart_driver, port);  in bcm_uart_remove()
858 	/* mark port as free */  in bcm_uart_remove()