// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2015 Karol Kosik <karo9@interia.eu> * Copyright (C) 2015-2016 Samsung Electronics * Igor Kotrasinski <i.kotrasinsk@samsung.com> * Krzysztof Opasiak <k.opasiak@samsung.com> */ #include <linux/device.h> #include <linux/list.h> #include <linux/module.h> #include "vudc.h" static unsigned int vudc_number = 1; module_param_named(num, vudc_number, uint, S_IRUGO); MODULE_PARM_DESC(num, "number of emulated controllers"); static struct platform_driver vudc_driver = { .probe = vudc_probe, .remove = vudc_remove, .driver = { .name = GADGET_NAME, .dev_groups = vudc_groups, }, }; static struct list_head vudc_devices = LIST_HEAD_INIT(vudc_devices); static int __init init(void) { int retval = -ENOMEM; int i; struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL; if (usb_disabled()) return -ENODEV; if (vudc_number < 1) { pr_err("Number of emulated UDC must be no less than 1"); return -EINVAL; } retval = platform_driver_register(&vudc_driver); if (retval < 0) goto out; for (i = 0; i < vudc_number; i++) { udc_dev = alloc_vudc_device(i); if (!udc_dev) { retval = -ENOMEM; goto cleanup; } retval = platform_device_add(udc_dev->pdev); if (retval < 0) { put_vudc_device(udc_dev); goto cleanup; } list_add_tail(&udc_dev->dev_entry, &vudc_devices); if (!platform_get_drvdata(udc_dev->pdev)) { /* * The udc was added successfully but its probe * function failed for some reason. */ retval = -EINVAL; goto cleanup; } } goto out; cleanup: list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices, dev_entry) { list_del(&udc_dev->dev_entry); /* * Just do platform_device_del() here, put_vudc_device() * calls the platform_device_put() */ platform_device_del(udc_dev->pdev); put_vudc_device(udc_dev); } platform_driver_unregister(&vudc_driver); out: return retval; } module_init(init); static void __exit cleanup(void) { struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL; list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices, dev_entry) { list_del(&udc_dev->dev_entry); /* * Just do platform_device_del() here, put_vudc_device() * calls the platform_device_put() */ platform_device_del(udc_dev->pdev); put_vudc_device(udc_dev); } platform_driver_unregister(&vudc_driver); } module_exit(cleanup); MODULE_DESCRIPTION("USB over IP Device Controller"); MODULE_AUTHOR("Krzysztof Opasiak, Karol Kosik, Igor Kotrasinski"); MODULE_LICENSE("GPL");