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1da177e4 LT |
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__ */ |