From: Igor Kotrasinski <i.kotrasinsk@xxxxxxxxxxx>
Add main vudc module file. This allows us to register suitable
platform device and driver (just like dummy_hcd does).
Currently number of vudc instances is determined using module
parameter but whole infrastructure is suitable to make vudc
creation dynamic (for example via configfs).
This commit is a result of cooperation between Samsung R&D Institute
Poland and Open Operating Systems Student Society at University
of Warsaw (O2S3@UW) consisting of:
Igor Kotrasinski <ikotrasinsk@xxxxxxxxx>
Karol Kosik <karo9@xxxxxxxxxx>
Ewelina Kosmider <3w3lfin@xxxxxxxxx>
Dawid Lazarczyk <lazarczyk.dawid@xxxxxxxxx>
Piotr Szulc <ps347277@xxxxxxxxxxxxxxxxxxxxx>
Tutor and project owner:
Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
Signed-off-by: Igor Kotrasinski <i.kotrasinsk@xxxxxxxxxxx>
Signed-off-by: Karol Kosik <karo9@xxxxxxxxxx>
[Various bug fixes and commit message update]
Signed-off-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
---
drivers/usb/usbip/vudc_main.c | 113 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 113 insertions(+)
create mode 100644 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 0000000..9e65571
--- /dev/null
+++ b/drivers/usb/usbip/vudc_main.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@xxxxxxxxxx>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@xxxxxxxxxxx>
+ * Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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,
+ },
+};
+
+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);
+ 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);
+ platform_device_unregister(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");
--
1.7.9.5
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