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// SPDX-License-Identifier: GPL-2.0/* * USB Serial Converter Generic functions * * Copyright (C) 2010 - 2013 Johan Hovold (jhovold@gmail.com) * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) */static __u16 vendor = 0x05f9;static __u16 product = 0xffff;module_param(vendor, ushort, 0);MODULE_PARM_DESC(vendor, "User specified USB idVendor");module_param(product, ushort, 0);MODULE_PARM_DESC(product, "User specified USB idProduct");static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */static int usb_serial_generic_probe(struct usb_serial *serial, const struct usb_device_id *id){ struct device *dev = &serial->interface->dev; dev_info(dev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n"); dev_info(dev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n"); return 0;}static int usb_serial_generic_calc_num_ports(struct usb_serial *serial, struct usb_serial_endpoints *epds){ struct device *dev = &serial->interface->dev; int num_ports; num_ports = max(epds->num_bulk_in, epds->num_bulk_out); if (num_ports == 0) { dev_err(dev, "device has no bulk endpoints\n"); return -ENODEV; } return num_ports;}static struct usb_serial_driver usb_serial_generic_device = { .driver = { .owner = THIS_MODULE, .name = "generic", }, .id_table = generic_device_ids, .probe = usb_serial_generic_probe, .calc_num_ports = usb_serial_generic_calc_num_ports, .throttle = usb_serial_generic_throttle, .unthrottle = usb_serial_generic_unthrottle, .resume = usb_serial_generic_resume,};static struct usb_serial_driver * const serial_drivers[] = { &usb_serial_generic_device, NULL};int usb_serial_generic_register(void){ int retval = 0; generic_device_ids[0].idVendor = vendor; generic_device_ids[0].idProduct = product; generic_device_ids[0].match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT;