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 = kmalloc(size, GFP_KERNEL);
56
memcpy(buf, data, size);
58
len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
60
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
61
roccat_common_feature_report(report_id),
62
0, buf, size, USB_CTRL_SET_TIMEOUT);
65
return ((len < 0) ? len : ((len != size) ? -EIO : 0));
67
EXPORT_SYMBOL_GPL(roccat_common_send);
69
MODULE_AUTHOR("Stefan Achatz");
70
MODULE_DESCRIPTION("USB Roccat common driver");
71
MODULE_LICENSE("GPL v2");