From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/usb/usbip/vudc_main.c | 110 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 drivers/usb/usbip/vudc_main.c

(limited to 'drivers/usb/usbip/vudc_main.c')

diff --git a/drivers/usb/usbip/vudc_main.c b/drivers/usb/usbip/vudc_main.c
new file mode 100644
index 000000000..993e721cb
--- /dev/null
+++ b/drivers/usb/usbip/vudc_main.c
@@ -0,0 +1,110 @@
+// 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 LIST_HEAD(vudc_devices);
+
+static int __init vudc_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(vudc_init);
+
+static void __exit vudc_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(vudc_cleanup);
+
+MODULE_DESCRIPTION("USB over IP Device Controller");
+MODULE_AUTHOR("Krzysztof Opasiak, Karol Kosik, Igor Kotrasinski");
+MODULE_LICENSE("GPL");
-- 
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