89 #define efm_debug(efm_port, format, arg...)			\  argument
90 	dev_dbg(efm_port->port.dev, format, ##arg)
92 static void efm32_uart_write32(struct efm32_uart_port *efm_port,  in efm32_uart_write32()  argument
95 	writel_relaxed(value, efm_port->port.membase + offset);  in efm32_uart_write32()
98 static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,  in efm32_uart_read32()  argument
101 	return readl_relaxed(efm_port->port.membase + offset);  in efm32_uart_read32()
106 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_tx_empty()  local
107 	u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_tx_empty()
128 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_stop_tx()  local
129 	u32 ien = efm32_uart_read32(efm_port,  UARTn_IEN);  in efm32_uart_stop_tx()
131 	efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);  in efm32_uart_stop_tx()
133 	efm32_uart_write32(efm_port, ien, UARTn_IEN);  in efm32_uart_stop_tx()
136 static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)  in efm32_uart_tx_chars()  argument
138 	struct uart_port *port = &efm_port->port;  in efm32_uart_tx_chars()
141 	while (efm32_uart_read32(efm_port, UARTn_STATUS) &  in efm32_uart_tx_chars()
145 			efm32_uart_write32(efm_port, port->x_char,  in efm32_uart_tx_chars()
152 			efm32_uart_write32(efm_port, xmit->buf[xmit->tail],  in efm32_uart_tx_chars()
163 			efm32_uart_read32(efm_port, UARTn_STATUS) &  in efm32_uart_tx_chars()
170 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_start_tx()  local
173 	efm32_uart_write32(efm_port,  in efm32_uart_start_tx()
175 	ien = efm32_uart_read32(efm_port, UARTn_IEN);  in efm32_uart_start_tx()
176 	efm32_uart_write32(efm_port,  in efm32_uart_start_tx()
178 	efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);  in efm32_uart_start_tx()
180 	efm32_uart_tx_chars(efm_port);  in efm32_uart_start_tx()
185 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_stop_rx()  local
187 	efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);  in efm32_uart_stop_rx()
195 static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)  in efm32_uart_rx_chars()  argument
197 	struct uart_port *port = &efm_port->port;  in efm32_uart_rx_chars()
199 	while (efm32_uart_read32(efm_port, UARTn_STATUS) &  in efm32_uart_rx_chars()
201 		u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);  in efm32_uart_rx_chars()
245 	struct efm32_uart_port *efm_port = data;  in efm32_uart_rxirq()  local
246 	u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);  in efm32_uart_rxirq()
248 	struct uart_port *port = &efm_port->port;  in efm32_uart_rxirq()
254 		efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);  in efm32_uart_rxirq()
255 		efm32_uart_rx_chars(efm_port);  in efm32_uart_rxirq()
261 		efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);  in efm32_uart_rxirq()
277 	struct efm32_uart_port *efm_port = data;  in efm32_uart_txirq()  local
278 	u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);  in efm32_uart_txirq()
282 		efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);  in efm32_uart_txirq()
285 		efm32_uart_tx_chars(efm_port);  in efm32_uart_txirq()
293 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_startup()  local
296 	ret = clk_enable(efm_port->clk);  in efm32_uart_startup()
298 		efm_debug(efm_port, "failed to enable clk\n");  in efm32_uart_startup()
301 	port->uartclk = clk_get_rate(efm_port->clk);  in efm32_uart_startup()
304 	efm32_uart_write32(efm_port,  in efm32_uart_startup()
305 			UARTn_ROUTE_LOCATION(efm_port->pdata.location) |  in efm32_uart_startup()
310 			DRIVER_NAME, efm_port);  in efm32_uart_startup()
312 		efm_debug(efm_port, "failed to register rxirq\n");  in efm32_uart_startup()
317 	efm32_uart_write32(efm_port, 0, UARTn_IEN);  in efm32_uart_startup()
319 	ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,  in efm32_uart_startup()
320 			DRIVER_NAME, efm_port);  in efm32_uart_startup()
322 		efm_debug(efm_port, "failed to register txirq\n");  in efm32_uart_startup()
323 		free_irq(port->irq, efm_port);  in efm32_uart_startup()
326 		clk_disable(efm_port->clk);  in efm32_uart_startup()
328 		efm32_uart_write32(efm_port,  in efm32_uart_startup()
330 		efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);  in efm32_uart_startup()
339 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_shutdown()  local
341 	efm32_uart_write32(efm_port, 0, UARTn_IEN);  in efm32_uart_shutdown()
342 	free_irq(port->irq, efm_port);  in efm32_uart_shutdown()
344 	clk_disable(efm_port->clk);  in efm32_uart_shutdown()
350 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_set_termios()  local
400 	efm32_uart_write32(efm_port,  in efm32_uart_set_termios()
419 	efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);  in efm32_uart_set_termios()
420 	efm32_uart_write32(efm_port, frame, UARTn_FRAME);  in efm32_uart_set_termios()
421 	efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);  in efm32_uart_set_termios()
423 	efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,  in efm32_uart_set_termios()
436 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_release_port()  local
438 	clk_unprepare(efm_port->clk);  in efm32_uart_release_port()
439 	clk_put(efm_port->clk);  in efm32_uart_release_port()
445 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_request_port()  local
449 	if (!efm_port->port.membase) {  in efm32_uart_request_port()
451 		efm_debug(efm_port, "failed to remap\n");  in efm32_uart_request_port()
455 	efm_port->clk = clk_get(port->dev, NULL);  in efm32_uart_request_port()
456 	if (IS_ERR(efm_port->clk)) {  in efm32_uart_request_port()
457 		ret = PTR_ERR(efm_port->clk);  in efm32_uart_request_port()
458 		efm_debug(efm_port, "failed to get clock\n");  in efm32_uart_request_port()
462 	ret = clk_prepare(efm_port->clk);  in efm32_uart_request_port()
464 		clk_put(efm_port->clk);  in efm32_uart_request_port()
515 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_console_putchar()  local
520 		status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_console_putchar()
527 	efm32_uart_write32(efm_port, ch, UARTn_TXDATA);  in efm32_uart_console_putchar()
533 	struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];  in efm32_uart_console_write()  local
534 	u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_console_write()
538 		efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);  in efm32_uart_console_write()
540 	uart_console_write(&efm_port->port, s, count,  in efm32_uart_console_write()
545 		u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_console_write()
553 		efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);  in efm32_uart_console_write()
556 static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,  in efm32_uart_console_get_options()  argument
559 	u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);  in efm32_uart_console_get_options()
566 	route = efm32_uart_read32(efm_port, UARTn_ROUTE);  in efm32_uart_console_get_options()
571 	clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);  in efm32_uart_console_get_options()
573 	*baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,  in efm32_uart_console_get_options()
576 	frame = efm32_uart_read32(efm_port, UARTn_FRAME);  in efm32_uart_console_get_options()
591 	efm_debug(efm_port, "get_opts: options=%d%c%d\n",  in efm32_uart_console_get_options()
597 	struct efm32_uart_port *efm_port;  in efm32_uart_console_setup()  local
616 	efm_port = efm32_uart_ports[co->index];  in efm32_uart_console_setup()
617 	if (!efm_port) {  in efm32_uart_console_setup()
622 	ret = clk_prepare(efm_port->clk);  in efm32_uart_console_setup()
624 		dev_warn(efm_port->port.dev,  in efm32_uart_console_setup()
629 	efm_port->port.uartclk = clk_get_rate(efm_port->clk);  in efm32_uart_console_setup()
634 		efm32_uart_console_get_options(efm_port,  in efm32_uart_console_setup()
637 	return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);  in efm32_uart_console_setup()
665 		struct efm32_uart_port *efm_port)  in efm32_uart_probe_dt()  argument
689 		efm_debug(efm_port, "using location %u\n", location);  in efm32_uart_probe_dt()
690 		efm_port->pdata.location = location;  in efm32_uart_probe_dt()
692 		efm_debug(efm_port, "fall back to location 0\n");  in efm32_uart_probe_dt()
700 		efm_port->port.line = ret;  in efm32_uart_probe_dt()
708 	struct efm32_uart_port *efm_port;  in efm32_uart_probe()  local
713 	efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);  in efm32_uart_probe()
714 	if (!efm_port) {  in efm32_uart_probe()
738 	efm_port->port.irq = ret;  in efm32_uart_probe()
742 		ret = efm_port->port.irq + 1;  in efm32_uart_probe()
744 	efm_port->txirq = ret;  in efm32_uart_probe()
746 	efm_port->port.dev = &pdev->dev;  in efm32_uart_probe()
747 	efm_port->port.mapbase = res->start;  in efm32_uart_probe()
748 	efm_port->port.type = PORT_EFMUART;  in efm32_uart_probe()
749 	efm_port->port.iotype = UPIO_MEM32;  in efm32_uart_probe()
750 	efm_port->port.fifosize = 2;  in efm32_uart_probe()
751 	efm_port->port.ops = &efm32_uart_pops;  in efm32_uart_probe()
752 	efm_port->port.flags = UPF_BOOT_AUTOCONF;  in efm32_uart_probe()
754 	ret = efm32_uart_probe_dt(pdev, efm_port);  in efm32_uart_probe()
759 		efm_port->port.line = pdev->id;  in efm32_uart_probe()
762 			efm_port->pdata = *pdata;  in efm32_uart_probe()
766 	line = efm_port->port.line;  in efm32_uart_probe()
769 		efm32_uart_ports[line] = efm_port;  in efm32_uart_probe()
771 	ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);  in efm32_uart_probe()
781 		kfree(efm_port);  in efm32_uart_probe()
783 		platform_set_drvdata(pdev, efm_port);  in efm32_uart_probe()
792 	struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);  in efm32_uart_remove()  local
793 	unsigned int line = efm_port->port.line;  in efm32_uart_remove()
795 	uart_remove_one_port(&efm32_uart_reg, &efm_port->port);  in efm32_uart_remove()
800 	kfree(efm_port);  in efm32_uart_remove()