1 // SPDX-License-Identifier: GPL-2.0-or-later
17 #define DRIVER_NAME	"esp32s3-acm"
41 		.compatible = "esp,esp32s3-acm",
50 	writel(v, port->membase + reg);  in esp32s3_acm_write()
55 	return readl(port->membase + reg);  in esp32s3_acm_read()
105 	struct tty_port *tty_port = &port->state->port;  in esp32s3_acm_rxint()
113 	spin_lock_irqsave(&port->lock, flags);  in esp32s3_acm_rxint()
118 		++port->icount.rx;  in esp32s3_acm_rxint()
121 	spin_unlock_irqrestore(&port->lock, flags);  in esp32s3_acm_rxint()
144 			dev_warn(port->dev, "timeout waiting for TX FIFO\n");  in esp32s3_acm_put_char_sync()
164 				       ESP32S3_ACM_TX_FIFO_SIZE - tx_fifo_used,  in esp32s3_acm_transmit_buffer()
216 	ret = request_irq(port->irq, esp32s3_acm_int, 0, DRIVER_NAME, port);  in esp32s3_acm_startup()
228 	free_irq(port->irq, port);  in esp32s3_acm_shutdown()
239 	return "ESP32S3 ACM";  in esp32s3_acm_type()
242 /* configure/auto-configure the port */
246 		port->type = PORT_GENERIC;  in esp32s3_acm_config_port()
291 	struct uart_port *port = esp32s3_acm_ports[co->index];  in esp32s3_acm_console_write()
295 	if (port->sysrq)  in esp32s3_acm_console_write()
298 		locked = spin_trylock_irqsave(&port->lock, flags);  in esp32s3_acm_console_write()
300 		spin_lock_irqsave(&port->lock, flags);  in esp32s3_acm_console_write()
305 		spin_unlock_irqrestore(&port->lock, flags);  in esp32s3_acm_console_write()
314 	.index		= -1,
321 	struct earlycon_device *dev = con->data;  in esp32s3_acm_earlycon_write()
323 	uart_console_write(&dev->port, s, n, esp32s3_acm_put_char_sync);  in esp32s3_acm_earlycon_write()
329 	struct earlycon_device *dev = con->data;  in esp32s3_acm_earlycon_read()
333 		int c = esp32s3_acm_poll_get_char(&dev->port);  in esp32s3_acm_earlycon_read()
346 	if (!device->port.membase)  in esp32s3_acm_early_console_setup()
347 		return -ENODEV;  in esp32s3_acm_early_console_setup()
349 	device->con->write = esp32s3_acm_earlycon_write;  in esp32s3_acm_early_console_setup()
351 	device->con->read = esp32s3_acm_earlycon_read;  in esp32s3_acm_early_console_setup()
356 OF_EARLYCON_DECLARE(esp32s3acm, "esp,esp32s3-acm",
369 	struct device_node *np = pdev->dev.of_node;  in esp32s3_acm_probe()
374 	port = devm_kzalloc(&pdev->dev, sizeof(*port), GFP_KERNEL);  in esp32s3_acm_probe()
376 		return -ENOMEM;  in esp32s3_acm_probe()
380 		dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret);  in esp32s3_acm_probe()
384 		dev_err(&pdev->dev, "driver limited to %d serial ports\n",  in esp32s3_acm_probe()
386 		return -ENOMEM;  in esp32s3_acm_probe()
389 	port->line = ret;  in esp32s3_acm_probe()
393 		return -ENODEV;  in esp32s3_acm_probe()
395 	port->mapbase = res->start;  in esp32s3_acm_probe()
396 	port->membase = devm_ioremap_resource(&pdev->dev, res);  in esp32s3_acm_probe()
397 	if (IS_ERR(port->membase))  in esp32s3_acm_probe()
398 		return PTR_ERR(port->membase);  in esp32s3_acm_probe()
400 	port->dev = &pdev->dev;  in esp32s3_acm_probe()
401 	port->type = PORT_GENERIC;  in esp32s3_acm_probe()
402 	port->iotype = UPIO_MEM;  in esp32s3_acm_probe()
403 	port->irq = platform_get_irq(pdev, 0);  in esp32s3_acm_probe()
404 	port->ops = &esp32s3_acm_pops;  in esp32s3_acm_probe()
405 	port->flags = UPF_BOOT_AUTOCONF;  in esp32s3_acm_probe()
406 	port->has_sysrq = 1;  in esp32s3_acm_probe()
407 	port->fifosize = ESP32S3_ACM_TX_FIFO_SIZE;  in esp32s3_acm_probe()
409 	esp32s3_acm_ports[port->line] = port;  in esp32s3_acm_probe()
458 MODULE_DESCRIPTION("Espressif ESP32 USB ACM gadget support");