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 <linux/module.h>
17 #include "hid-roccat-common.h"
19 static inline uint16_t roccat_common_feature_report(uint8_t report_id)
21 return 0x300 | report_id;
24 int roccat_common_receive(struct usb_device *usb_dev, uint report_id,
25 void *data, uint size)
30 buf = kmalloc(size, GFP_KERNEL);
34 len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
36 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
37 roccat_common_feature_report(report_id),
38 0, buf, size, USB_CTRL_SET_TIMEOUT);
40 memcpy(data, buf, size);
42 return ((len < 0) ? len : ((len != size) ? -EIO : 0));
44 EXPORT_SYMBOL_GPL(roccat_common_receive);
46 int roccat_common_send(struct usb_device *usb_dev, uint report_id,
47 void const *data, uint size)
52 buf = kmemdup(data, size, GFP_KERNEL);
56 len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
58 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
59 roccat_common_feature_report(report_id),
60 0, buf, size, USB_CTRL_SET_TIMEOUT);
63 return ((len < 0) ? len : ((len != size) ? -EIO : 0));
65 EXPORT_SYMBOL_GPL(roccat_common_send);
67 MODULE_AUTHOR("Stefan Achatz");
68 MODULE_DESCRIPTION("USB Roccat common driver");
69 MODULE_LICENSE("GPL v2");