1 files changed, 95 insertions, 0 deletions
diff --git a/backport-include/linux/usb.h b/backport-include/linux/usb.h
new file mode 100644
index 0000000..1873a33
--- /dev/null
+++ b/backport-include/linux/usb.h
@@ -0,0 +1,95 @@
+#ifndef __BACKPORT_USB_H
+#define __BACKPORT_USB_H
+
+#include_next <linux/usb.h>
+#include <linux/version.h>
+
+#ifndef module_usb_driver
+/**
+ * module_usb_driver() - Helper macro for registering a USB driver
+ * @__usb_driver: usb_driver struct
+ *
+ * Helper macro for USB drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_usb_driver(__usb_driver) \
+	module_driver(__usb_driver, usb_register, \
+		       usb_deregister)
+#endif
+
+#ifndef USB_VENDOR_AND_INTERFACE_INFO
+/**
+ * Backports
+ *
+ * commit d81a5d1956731c453b85c141458d4ff5d6cc5366
+ * Author: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
+ * Date:   Tue Jul 10 19:10:06 2012 -0300
+ *
+ * 	USB: add USB_VENDOR_AND_INTERFACE_INFO() macro
+ */
+#define USB_VENDOR_AND_INTERFACE_INFO(vend, cl, sc, pr) \
+       .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \
+               | USB_DEVICE_ID_MATCH_VENDOR, \
+       .idVendor = (vend), \
+       .bInterfaceClass = (cl), \
+       .bInterfaceSubClass = (sc), \
+       .bInterfaceProtocol = (pr)
+#endif /* USB_VENDOR_AND_INTERFACE_INFO */
+
+#ifndef USB_DEVICE_INTERFACE_NUMBER
+/**
+ * USB_DEVICE_INTERFACE_NUMBER - describe a usb device with a specific interface number
+ * @vend: the 16 bit USB Vendor ID
+ * @prod: the 16 bit USB Product ID
+ * @num: bInterfaceNumber value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific interface number of devices.
+ */
+#define USB_DEVICE_INTERFACE_NUMBER(vend, prod, num) \
+	.match_flags = USB_DEVICE_ID_MATCH_DEVICE, \
+	.idVendor = (vend), \
+	.idProduct = (prod)
+#endif /* USB_DEVICE_INTERFACE_NUMBER */
+
+#ifndef USB_DEVICE_INTERFACE_CLASS
+/**
+ * USB_DEVICE_INTERFACE_CLASS - describe a usb device with a specific interface class
+ * @vend: the 16 bit USB Vendor ID
+ * @prod: the 16 bit USB Product ID
+ * @cl: bInterfaceClass value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific interface class of devices.
+ */
+#define USB_DEVICE_INTERFACE_CLASS(vend, prod, cl) \
+	.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
+		       USB_DEVICE_ID_MATCH_INT_CLASS, \
+	.idVendor = (vend), \
+	.idProduct = (prod), \
+	.bInterfaceClass = (cl)
+#endif /* USB_DEVICE_INTERFACE_CLASS */
+
+#ifndef USB_SUBCLASS_VENDOR_SPEC
+/* this is defined in usb/ch9.h, but we only need it through here */
+#define USB_SUBCLASS_VENDOR_SPEC	0xff
+#endif
+
+#if LINUX_VERSION_IS_LESS(3,2,0)
+#define usb_translate_errors LINUX_BACKPORT(usb_translate_errors)
+static inline int usb_translate_errors(int error_code)
+{
+	switch (error_code) {
+	case 0:
+	case -ENOMEM:
+	case -ENODEV:
+	case -EOPNOTSUPP:
+		return error_code;
+	default:
+		return -EIO;
+	}
+}
+#endif /* LINUX_VERSION_IS_LESS(3,2,0) */
+
+#endif /* __BACKPORT_USB_H */