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      1 /*	$NetBSD: bth5.h,v 1.2 2017/09/03 23:11:19 nat Exp $	*/
      2 /*
      3  * Copyright (c) 2017 Nathanial Sloss <nathanialsloss (at) yahoo.com.au>
      4  * All rights reserved.
      5  *
      6  * Copyright (c) 2007 KIYOHARA Takashi
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef _DEV_BLUETOOTH_BTH5_H_
     32 #define _DEV_BLUETOOTH_BTH5_H_
     33 
     34 /*
     35  * BT UART H5 (3-wire) serial protocol definitions.
     36  */
     37 
     38 /* BTH5 packet header */
     39 typedef struct {
     40 	uint8_t flags;
     41 #if BYTE_ORDER == BIG_ENDIAN
     42 	uint8_t plen1 :4;		/* Payload Length (bits 0-3) */
     43 	uint8_t ident :4;		/* Protocol Identifier */
     44 #else
     45 	uint8_t ident :4;		/* Protocol Identifier */
     46 	uint8_t plen1 :4;		/* Payload Length (bits 0-3) */
     47 #endif
     48 	uint8_t plen2;			/* Payload Length (bits 4-11) */
     49 	uint8_t csum;			/* Checksum */
     50 	u_char payload[0];
     51 } __packed bth5_hdr_t;
     52 
     53 #define BTH5_FLAGS_SEQ_SHIFT	0
     54 #define BTH5_FLAGS_SEQ_MASK	0x07
     55 #define BTH5_FLAGS_SEQ(n) \
     56 	(((n) & BTH5_FLAGS_SEQ_MASK) >> BTH5_FLAGS_SEQ_SHIFT)
     57 #define BTH5_FLAGS_ACK_SHIFT	3
     58 #define BTH5_FLAGS_ACK_MASK	0x38
     59 #define BTH5_FLAGS_ACK(n) \
     60 	(((n) & BTH5_FLAGS_ACK_MASK) >> BTH5_FLAGS_ACK_SHIFT)
     61 #define BTH5_FLAGS_CRC_PRESENT	0x40
     62 #define BTH5_FLAGS_PROTOCOL_TYPE 0x80
     63 #define BTH5_FLAGS_PROTOCOL_REL	0x80
     64 
     65 #define BTH5_CONFIG_ACK_MASK	0x07
     66 #define BTH5_CONFIG_FLOW_MASK	(1 << 7)
     67 
     68 #define BTH5_SET_PLEN(hdrp, n)				\
     69 	do {						\
     70 		(hdrp)->plen1 = ((n) & 0x00f);		\
     71 		(hdrp)->plen2 = ((n) >> 4);		\
     72 	} while (0)
     73 #define BTH5_GET_PLEN(hdrp)	((hdrp)->plen1 | ((hdrp)->plen2 << 4))
     74 
     75 #define BTH5_GET_CSUM(hdrp)						\
     76 	(0xff - (uint8_t)((hdrp)->flags + ((hdrp)->plen1 << 4) +	\
     77 	(hdrp)->ident + (hdrp)->plen2))
     78 #define BTH5_SET_CSUM(hdrp)	((hdrp)->csum = BTH5_GET_CSUM(hdrp))
     79 
     80 
     81 #define BTH5_IDENT_ACKPKT	0	/* Used by MUX Layer */
     82 
     83 /* definitions of SLIP Layer */
     84 #define BTH5_SLIP_PKTSTART	0xc0
     85 #define BTH5_SLIP_PKTEND	BTH5_SLIP_PKTSTART
     86 #define BTH5_SLIP_XON		0x11
     87 #define BTH5_SLIP_XOFF		0x13
     88 #define BTH5_SLIP_ESCAPE	0xdb
     89 #define BTH5_SLIP_ESCAPE_PKTEND	0xdc
     90 #define BTH5_SLIP_ESCAPE_ESCAPE	0xdd
     91 #define BTH5_SLIP_ESCAPE_XON	0xde
     92 #define BTH5_SLIP_ESCAPE_XOFF	0xdf
     93 
     94 
     95 /* definitions of Sequencing Layer */
     96 #define BTH5_SEQ_TX_TIMEOUT	(hz / 4)	/* 250 msec */
     97 #define BTH5_SEQ_TX_WINSIZE	7
     98 #define BTH5_SEQ_TX_RETRY_LIMIT	20
     99 
    100 
    101 /*
    102  *   Channel Allocation
    103  */
    104 #define BTH5_CHANNEL_HCI_CMD	1	/* HCI Command and Event */
    105 #define BTH5_CHANNEL_HCI_EVT	4	/* HCI Command and Event */
    106 #define BTH5_CHANNEL_HCI_ACL	2	/* HCI ACL data */
    107 #define BTH5_CHANNEL_HCI_SCO	3	/* HCI SCO data */
    108 #define BTH5_CHANNEL_LE		15	/* Link Establishment */
    109 
    110 
    111 /*
    112  *   Link Establishment Protocol
    113  */
    114 typedef enum {
    115 	le_state_shy,
    116 	le_state_curious,
    117 	le_state_garrulous
    118 } bth5_le_state_t;
    119 
    120 #define BTH5_LE_SYNC		{ 0x01, 0x7e };
    121 #define BTH5_LE_SYNCRESP	{ 0x02, 0x7d };
    122 #define BTH5_LE_CONF		{ 0x03, 0xfc, 0x0f };
    123 #define BTH5_LE_CONFRESP	{ 0x04, 0x7b, 0x0f };
    124 
    125 #define BTH5_LE_TSHY_TIMEOUT	hz	/* XXXX: 1sec ? */
    126 #define BTH5_LE_TCONF_TIMEOUT	hz	/* XXXX: 1sec ? */
    127 
    128 #endif	/* !_DEV_BLUETOOTH_BTH5_H_ */
    129