--- zzzz-none-000/linux-3.10.107/drivers/hid/hid-roccat-common.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/hid/hid-roccat-common.h	2021-02-04 17:41:59.000000000 +0000
@@ -32,4 +32,66 @@
 int roccat_common2_send_with_status(struct usb_device *usb_dev,
 		uint command, void const *buf, uint size);
 
+struct roccat_common2_device {
+	int roccat_claimed;
+	int chrdev_minor;
+	struct mutex lock;
+};
+
+int roccat_common2_device_init_struct(struct usb_device *usb_dev,
+		struct roccat_common2_device *dev);
+ssize_t roccat_common2_sysfs_read(struct file *fp, struct kobject *kobj,
+		char *buf, loff_t off, size_t count,
+		size_t real_size, uint command);
+ssize_t roccat_common2_sysfs_write(struct file *fp, struct kobject *kobj,
+		void const *buf, loff_t off, size_t count,
+		size_t real_size, uint command);
+
+#define ROCCAT_COMMON2_SYSFS_W(thingy, COMMAND, SIZE) \
+static ssize_t roccat_common2_sysfs_write_ ## thingy(struct file *fp, \
+		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
+		loff_t off, size_t count) \
+{ \
+	return roccat_common2_sysfs_write(fp, kobj, buf, off, count, \
+			SIZE, COMMAND); \
+}
+
+#define ROCCAT_COMMON2_SYSFS_R(thingy, COMMAND, SIZE) \
+static ssize_t roccat_common2_sysfs_read_ ## thingy(struct file *fp, \
+		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
+		loff_t off, size_t count) \
+{ \
+	return roccat_common2_sysfs_read(fp, kobj, buf, off, count, \
+			SIZE, COMMAND); \
+}
+
+#define ROCCAT_COMMON2_SYSFS_RW(thingy, COMMAND, SIZE) \
+ROCCAT_COMMON2_SYSFS_W(thingy, COMMAND, SIZE) \
+ROCCAT_COMMON2_SYSFS_R(thingy, COMMAND, SIZE)
+
+#define ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(thingy, COMMAND, SIZE) \
+ROCCAT_COMMON2_SYSFS_RW(thingy, COMMAND, SIZE); \
+static struct bin_attribute bin_attr_ ## thingy = { \
+	.attr = { .name = #thingy, .mode = 0660 }, \
+	.size = SIZE, \
+	.read = roccat_common2_sysfs_read_ ## thingy, \
+	.write = roccat_common2_sysfs_write_ ## thingy \
+}
+
+#define ROCCAT_COMMON2_BIN_ATTRIBUTE_R(thingy, COMMAND, SIZE) \
+ROCCAT_COMMON2_SYSFS_R(thingy, COMMAND, SIZE); \
+static struct bin_attribute bin_attr_ ## thingy = { \
+	.attr = { .name = #thingy, .mode = 0440 }, \
+	.size = SIZE, \
+	.read = roccat_common2_sysfs_read_ ## thingy, \
+}
+
+#define ROCCAT_COMMON2_BIN_ATTRIBUTE_W(thingy, COMMAND, SIZE) \
+ROCCAT_COMMON2_SYSFS_W(thingy, COMMAND, SIZE); \
+static struct bin_attribute bin_attr_ ## thingy = { \
+	.attr = { .name = #thingy, .mode = 0220 }, \
+	.size = SIZE, \
+	.write = roccat_common2_sysfs_write_ ## thingy \
+}
+
 #endif