87 #define efm_debug(efm_port, format, arg...)			\  argument
88 	dev_dbg(efm_port->port.dev, format, ##arg)
90 static void efm32_uart_write32(struct efm32_uart_port *efm_port,  in efm32_uart_write32()  argument
93 	writel_relaxed(value, efm_port->port.membase + offset);  in efm32_uart_write32()
96 static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,  in efm32_uart_read32()  argument
99 	return readl_relaxed(efm_port->port.membase + offset);  in efm32_uart_read32()
104 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_tx_empty()  local
105 	u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_tx_empty()
126 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_stop_tx()  local
127 	u32 ien = efm32_uart_read32(efm_port,  UARTn_IEN);  in efm32_uart_stop_tx()
129 	efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);  in efm32_uart_stop_tx()
131 	efm32_uart_write32(efm_port, ien, UARTn_IEN);  in efm32_uart_stop_tx()
134 static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)  in efm32_uart_tx_chars()  argument
136 	struct uart_port *port = &efm_port->port;  in efm32_uart_tx_chars()
139 	while (efm32_uart_read32(efm_port, UARTn_STATUS) &  in efm32_uart_tx_chars()
143 			efm32_uart_write32(efm_port, port->x_char,  in efm32_uart_tx_chars()
150 			efm32_uart_write32(efm_port, xmit->buf[xmit->tail],  in efm32_uart_tx_chars()
161 			efm32_uart_read32(efm_port, UARTn_STATUS) &  in efm32_uart_tx_chars()
168 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_start_tx()  local
171 	efm32_uart_write32(efm_port,  in efm32_uart_start_tx()
173 	ien = efm32_uart_read32(efm_port, UARTn_IEN);  in efm32_uart_start_tx()
174 	efm32_uart_write32(efm_port,  in efm32_uart_start_tx()
176 	efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);  in efm32_uart_start_tx()
178 	efm32_uart_tx_chars(efm_port);  in efm32_uart_start_tx()
183 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_stop_rx()  local
185 	efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);  in efm32_uart_stop_rx()
193 static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)  in efm32_uart_rx_chars()  argument
195 	struct uart_port *port = &efm_port->port;  in efm32_uart_rx_chars()
197 	while (efm32_uart_read32(efm_port, UARTn_STATUS) &  in efm32_uart_rx_chars()
199 		u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);  in efm32_uart_rx_chars()
243 	struct efm32_uart_port *efm_port = data;  in efm32_uart_rxirq()  local
244 	u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);  in efm32_uart_rxirq()
246 	struct uart_port *port = &efm_port->port;  in efm32_uart_rxirq()
252 		efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);  in efm32_uart_rxirq()
253 		efm32_uart_rx_chars(efm_port);  in efm32_uart_rxirq()
259 		efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);  in efm32_uart_rxirq()
275 	struct efm32_uart_port *efm_port = data;  in efm32_uart_txirq()  local
276 	u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);  in efm32_uart_txirq()
280 		efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);  in efm32_uart_txirq()
283 		efm32_uart_tx_chars(efm_port);  in efm32_uart_txirq()
291 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_startup()  local
294 	ret = clk_enable(efm_port->clk);  in efm32_uart_startup()
296 		efm_debug(efm_port, "failed to enable clk\n");  in efm32_uart_startup()
299 	port->uartclk = clk_get_rate(efm_port->clk);  in efm32_uart_startup()
302 	efm32_uart_write32(efm_port,  in efm32_uart_startup()
303 			UARTn_ROUTE_LOCATION(efm_port->pdata.location) |  in efm32_uart_startup()
308 			DRIVER_NAME, efm_port);  in efm32_uart_startup()
310 		efm_debug(efm_port, "failed to register rxirq\n");  in efm32_uart_startup()
315 	efm32_uart_write32(efm_port, 0, UARTn_IEN);  in efm32_uart_startup()
317 	ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,  in efm32_uart_startup()
318 			DRIVER_NAME, efm_port);  in efm32_uart_startup()
320 		efm_debug(efm_port, "failed to register txirq\n");  in efm32_uart_startup()
321 		free_irq(port->irq, efm_port);  in efm32_uart_startup()
324 		clk_disable(efm_port->clk);  in efm32_uart_startup()
326 		efm32_uart_write32(efm_port,  in efm32_uart_startup()
328 		efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);  in efm32_uart_startup()
337 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_shutdown()  local
339 	efm32_uart_write32(efm_port, 0, UARTn_IEN);  in efm32_uart_shutdown()
340 	free_irq(port->irq, efm_port);  in efm32_uart_shutdown()
342 	clk_disable(efm_port->clk);  in efm32_uart_shutdown()
348 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_set_termios()  local
398 	efm32_uart_write32(efm_port,  in efm32_uart_set_termios()
417 	efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);  in efm32_uart_set_termios()
418 	efm32_uart_write32(efm_port, frame, UARTn_FRAME);  in efm32_uart_set_termios()
419 	efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);  in efm32_uart_set_termios()
421 	efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,  in efm32_uart_set_termios()
434 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_release_port()  local
436 	clk_unprepare(efm_port->clk);  in efm32_uart_release_port()
437 	clk_put(efm_port->clk);  in efm32_uart_release_port()
443 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_request_port()  local
447 	if (!efm_port->port.membase) {  in efm32_uart_request_port()
449 		efm_debug(efm_port, "failed to remap\n");  in efm32_uart_request_port()
453 	efm_port->clk = clk_get(port->dev, NULL);  in efm32_uart_request_port()
454 	if (IS_ERR(efm_port->clk)) {  in efm32_uart_request_port()
455 		ret = PTR_ERR(efm_port->clk);  in efm32_uart_request_port()
456 		efm_debug(efm_port, "failed to get clock\n");  in efm32_uart_request_port()
460 	ret = clk_prepare(efm_port->clk);  in efm32_uart_request_port()
462 		clk_put(efm_port->clk);  in efm32_uart_request_port()
513 	struct efm32_uart_port *efm_port = to_efm_port(port);  in efm32_uart_console_putchar()  local
518 		status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_console_putchar()
525 	efm32_uart_write32(efm_port, ch, UARTn_TXDATA);  in efm32_uart_console_putchar()
531 	struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];  in efm32_uart_console_write()  local
532 	u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_console_write()
536 		efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);  in efm32_uart_console_write()
538 	uart_console_write(&efm_port->port, s, count,  in efm32_uart_console_write()
543 		u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);  in efm32_uart_console_write()
551 		efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);  in efm32_uart_console_write()
554 static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,  in efm32_uart_console_get_options()  argument
557 	u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);  in efm32_uart_console_get_options()
564 	route = efm32_uart_read32(efm_port, UARTn_ROUTE);  in efm32_uart_console_get_options()
569 	clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);  in efm32_uart_console_get_options()
571 	*baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,  in efm32_uart_console_get_options()
574 	frame = efm32_uart_read32(efm_port, UARTn_FRAME);  in efm32_uart_console_get_options()
585 	efm_debug(efm_port, "get_opts: options=%d%c%d\n",  in efm32_uart_console_get_options()
591 	struct efm32_uart_port *efm_port;  in efm32_uart_console_setup()  local
610 	efm_port = efm32_uart_ports[co->index];  in efm32_uart_console_setup()
611 	if (!efm_port) {  in efm32_uart_console_setup()
616 	ret = clk_prepare(efm_port->clk);  in efm32_uart_console_setup()
618 		dev_warn(efm_port->port.dev,  in efm32_uart_console_setup()
623 	efm_port->port.uartclk = clk_get_rate(efm_port->clk);  in efm32_uart_console_setup()
628 		efm32_uart_console_get_options(efm_port,  in efm32_uart_console_setup()
631 	return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);  in efm32_uart_console_setup()
659 		struct efm32_uart_port *efm_port)  in efm32_uart_probe_dt()  argument
683 		efm_debug(efm_port, "using location %u\n", location);  in efm32_uart_probe_dt()
684 		efm_port->pdata.location = location;  in efm32_uart_probe_dt()
686 		efm_debug(efm_port, "fall back to location 0\n");  in efm32_uart_probe_dt()
694 		efm_port->port.line = ret;  in efm32_uart_probe_dt()
702 	struct efm32_uart_port *efm_port;  in efm32_uart_probe()  local
707 	efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);  in efm32_uart_probe()
708 	if (!efm_port) {  in efm32_uart_probe()
732 	efm_port->port.irq = ret;  in efm32_uart_probe()
736 		ret = efm_port->port.irq + 1;  in efm32_uart_probe()
738 	efm_port->txirq = ret;  in efm32_uart_probe()
740 	efm_port->port.dev = &pdev->dev;  in efm32_uart_probe()
741 	efm_port->port.mapbase = res->start;  in efm32_uart_probe()
742 	efm_port->port.type = PORT_EFMUART;  in efm32_uart_probe()
743 	efm_port->port.iotype = UPIO_MEM32;  in efm32_uart_probe()
744 	efm_port->port.fifosize = 2;  in efm32_uart_probe()
745 	efm_port->port.ops = &efm32_uart_pops;  in efm32_uart_probe()
746 	efm_port->port.flags = UPF_BOOT_AUTOCONF;  in efm32_uart_probe()
748 	ret = efm32_uart_probe_dt(pdev, efm_port);  in efm32_uart_probe()
753 		efm_port->port.line = pdev->id;  in efm32_uart_probe()
756 			efm_port->pdata = *pdata;  in efm32_uart_probe()
760 	line = efm_port->port.line;  in efm32_uart_probe()
763 		efm32_uart_ports[line] = efm_port;  in efm32_uart_probe()
765 	ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);  in efm32_uart_probe()
775 		kfree(efm_port);  in efm32_uart_probe()
777 		platform_set_drvdata(pdev, efm_port);  in efm32_uart_probe()
786 	struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);  in efm32_uart_remove()  local
787 	unsigned int line = efm_port->port.line;  in efm32_uart_remove()
789 	uart_remove_one_port(&efm32_uart_reg, &efm_port->port);  in efm32_uart_remove()
794 	kfree(efm_port);  in efm32_uart_remove()