2 * Roccat common functions for device specific drivers
4 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
14 #include <linux/hid.h>
15 #include <linux/slab.h>
16 #include "hid-roccat-common.h"
18 static inline uint16_t roccat_common_feature_report(uint8_t report_id)
20 return 0x300 | report_id;
23 int roccat_common_receive(struct usb_device *usb_dev, uint report_id,
24 void *data, uint size)
29 buf = kmalloc(size, GFP_KERNEL);
33 len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
35 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
36 roccat_common_feature_report(report_id),
37 0, buf, size, USB_CTRL_SET_TIMEOUT);
39 memcpy(data, buf, size);
41 return ((len < 0) ? len : ((len != size) ? -EIO : 0));
43 EXPORT_SYMBOL_GPL(roccat_common_receive);
45 int roccat_common_send(struct usb_device *usb_dev, uint report_id,
46 void const *data, uint size)
51 buf = kmalloc(size, GFP_KERNEL);
55 memcpy(buf, data, size);
57 len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
59 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
60 roccat_common_feature_report(report_id),
61 0, buf, size, USB_CTRL_SET_TIMEOUT);
64 return ((len < 0) ? len : ((len != size) ? -EIO : 0));
66 EXPORT_SYMBOL_GPL(roccat_common_send);
68 MODULE_AUTHOR("Stefan Achatz");
69 MODULE_DESCRIPTION("USB Roccat common driver");
70 MODULE_LICENSE("GPL v2");