1 /* 2 * Roccat common functions for device specific drivers 3 * 4 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net> 5 */ 6 7 /* 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) 11 * any later version. 12 */ 13 14 #include <linux/slab.h> 15 #include "hid-roccat-common.h" 16 17 int roccat_common_receive(struct usb_device *usb_dev, uint usb_command, 18 void *data, uint size) 19 { 20 char *buf; 21 int len; 22 23 buf = kmalloc(size, GFP_KERNEL); 24 if (buf == NULL) 25 return -ENOMEM; 26 27 len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 28 USB_REQ_CLEAR_FEATURE, 29 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 30 usb_command, 0, buf, size, USB_CTRL_SET_TIMEOUT); 31 32 memcpy(data, buf, size); 33 kfree(buf); 34 return ((len < 0) ? len : ((len != size) ? -EIO : 0)); 35 } 36 EXPORT_SYMBOL_GPL(roccat_common_receive); 37 38 int roccat_common_send(struct usb_device *usb_dev, uint usb_command, 39 void const *data, uint size) 40 { 41 char *buf; 42 int len; 43 44 buf = kmalloc(size, GFP_KERNEL); 45 if (buf == NULL) 46 return -ENOMEM; 47 48 memcpy(buf, data, size); 49 50 len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 51 USB_REQ_SET_CONFIGURATION, 52 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, 53 usb_command, 0, buf, size, USB_CTRL_SET_TIMEOUT); 54 55 kfree(buf); 56 return ((len < 0) ? len : ((len != size) ? -EIO : 0)); 57 } 58 EXPORT_SYMBOL_GPL(roccat_common_send); 59 60 MODULE_AUTHOR("Stefan Achatz"); 61 MODULE_DESCRIPTION("USB Roccat common driver"); 62 MODULE_LICENSE("GPL v2"); 63