drivers/bluetooth/hci_bcsp.h

   1 /*
   2    BlueCore Serial Protocol (BCSP) for Linux Bluetooth stack (BlueZ).
   3    Copyright 2002 by Fabrizio Gennari <fabrizio.gennari@philips.com>
   4
   5    Based on
   6        hci_h4.c  by Maxim Krasnyansky <maxk@qualcomm.com>
   7        ABCSP     by Carl Orsborn <cjo@csr.com>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License version 2 as
  11    published by the Free Software Foundation;
  12
  13    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  14    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  16    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  17    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  18    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  19    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  20    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21
  22    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  23    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  24    SOFTWARE IS DISCLAIMED.
  25 */
  26
  27 /*
  28  * $Id: hci_bcsp.h,v 1.2 2002/09/26 05:05:14 maxk Exp $
  29  */
  30
  31 #ifndef __HCI_BCSP_H__
  32 #define __HCI_BCSP_H__
  33
  34 #define BCSP_TXWINSIZE  4
  35
  36 #define BCSP_ACK_PKT    0x05
  37 #define BCSP_LE_PKT     0x06
  38
  39 struct bcsp_struct {
  40         struct sk_buff_head unack;      /* Unack'ed packets queue */
  41         struct sk_buff_head rel;        /* Reliable packets queue */
  42         struct sk_buff_head unrel;      /* Unreliable packets queue */
  43
  44         unsigned long rx_count;
  45         struct  sk_buff *rx_skb;
  46         u8      rxseq_txack;            /* rxseq == txack. */
  47         u8      rxack;                  /* Last packet sent by us that the peer ack'ed */
  48         struct  timer_list tbcsp;
  49
  50         enum {
  51                 BCSP_W4_PKT_DELIMITER,
  52                 BCSP_W4_PKT_START,
  53                 BCSP_W4_BCSP_HDR,
  54                 BCSP_W4_DATA,
  55                 BCSP_W4_CRC
  56         } rx_state;
  57
  58         enum {
  59                 BCSP_ESCSTATE_NOESC,
  60                 BCSP_ESCSTATE_ESC
  61         } rx_esc_state;
  62
  63         u16     message_crc;
  64         u8      txack_req;              /* Do we need to send ack's to the peer? */
  65
  66         /* Reliable packet sequence number - used to assign seq to each rel pkt. */
  67         u8      msgq_txseq;
  68 };
  69
  70 #endif  /* __HCI_BCSP_H__ */