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/hid.h> 15 #include <linux/slab.h> 16 #include "hid-roccat-common.h" 17 18 static inline uint16_t roccat_common_feature_report(uint8_t report_id) 19 { 20 return 0x300 | report_id; 21 } 22 23 int roccat_common_receive(struct usb_device *usb_dev, uint report_id, 24 void *data, uint size) 25 { 26 char *buf; 27 int len; 28 29 buf = kmalloc(size, GFP_KERNEL); 30 if (buf == NULL) 31 return -ENOMEM; 32 33 len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 34 HID_REQ_GET_REPORT, 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); 38 39 memcpy(data, buf, size); 40 kfree(buf); 41 return ((len < 0) ? len : ((len != size) ? -EIO : 0)); 42 } 43 EXPORT_SYMBOL_GPL(roccat_common_receive); 44 45 int roccat_common_send(struct usb_device *usb_dev, uint report_id, 46 void const *data, uint size) 47 { 48 char *buf; 49 int len; 50 51 buf = kmalloc(size, GFP_KERNEL); 52 if (buf == NULL) 53 return -ENOMEM; 54 55 memcpy(buf, data, size); 56 57 len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 58 HID_REQ_SET_REPORT, 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); 62 63 kfree(buf); 64 return ((len < 0) ? len : ((len != size) ? -EIO : 0)); 65 } 66 EXPORT_SYMBOL_GPL(roccat_common_send); 67 68 MODULE_AUTHOR("Stefan Achatz"); 69 MODULE_DESCRIPTION("USB Roccat common driver"); 70 MODULE_LICENSE("GPL v2"); 71