72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* Roccat common functions for device specific drivers
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*
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* Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/hid.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "hid-roccat-common.h"
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static inline uint16_t roccat_common_feature_report(uint8_t report_id)
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{
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return 0x300 | report_id;
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}
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int roccat_common_receive(struct usb_device *usb_dev, uint report_id,
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void *data, uint size)
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{
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char *buf;
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int len;
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buf = kmalloc(size, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
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HID_REQ_GET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
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roccat_common_feature_report(report_id),
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0, buf, size, USB_CTRL_SET_TIMEOUT);
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memcpy(data, buf, size);
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kfree(buf);
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return ((len < 0) ? len : ((len != size) ? -EIO : 0));
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}
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EXPORT_SYMBOL_GPL(roccat_common_receive);
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int roccat_common_send(struct usb_device *usb_dev, uint report_id,
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void const *data, uint size)
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{
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char *buf;
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int len;
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buf = kmalloc(size, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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memcpy(buf, data, size);
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len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
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HID_REQ_SET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
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roccat_common_feature_report(report_id),
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0, buf, size, USB_CTRL_SET_TIMEOUT);
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kfree(buf);
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return ((len < 0) ? len : ((len != size) ? -EIO : 0));
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}
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EXPORT_SYMBOL_GPL(roccat_common_send);
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MODULE_AUTHOR("Stefan Achatz");
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MODULE_DESCRIPTION("USB Roccat common driver");
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MODULE_LICENSE("GPL v2");
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