1/*	$NetBSD: init_swave.c,v 1.2 2009/04/15 00:32:23 lukem Exp $	*/
2
3/*-
4 * Copyright (c) 2008 Iain Hibbert
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28/*
29 * init information in this file gleaned from hciattach(8)
30 * command from BlueZ for Linux - see http://www.bluez.org/
31 */
32
33#include <sys/cdefs.h>
34__RCSID("$NetBSD: init_swave.c,v 1.2 2009/04/15 00:32:23 lukem Exp $");
35
36#include <bluetooth.h>
37#include <err.h>
38#include <errno.h>
39#include <stdlib.h>
40#include <string.h>
41#include <termios.h>
42
43#include "btattach.h"
44
45#define HCI_CMD_SWAVE_PARAM_ACCESS_SET \
46	HCI_OPCODE(HCI_OGF_VENDOR, 0x00b)
47
48typedef struct {
49	uint8_t		sub_command;
50	uint8_t		param_type;
51	uint8_t		param_length;
52	uint8_t		transport_flow;
53	uint8_t		transport_type;
54	uint8_t		transport_rate;
55} __attribute__ ((__packed__)) hci_param_access_set_cp;
56
57typedef struct {
58	uint8_t			d0;	/* ? */
59	hci_param_access_set_cp	cp;
60} __attribute__ ((__packed__)) hci_param_access_set_rp;
61
62void
63init_swave(int fd, unsigned int speed)
64{
65	hci_param_access_set_cp cp;
66	hci_param_access_set_rp rp;
67	size_t n;
68
69	cp.sub_command    = 0x01; /* set */
70	cp.param_type     = 0x11; /* HCI Transport */
71	cp.param_length   = 0x03;
72	cp.transport_flow = 0x01; /* flow control */
73	cp.transport_type = 0x01; /* UART */
74
75	switch(speed) {
76	case B19200:	cp.transport_rate = 0x03;	break;
77	case B38400:	cp.transport_rate = 0x02;	break;
78	case B57600:	cp.transport_rate = 0x01;	break;
79	case B115200:	cp.transport_rate = 0x00;	break;
80	default:
81		errx(EXIT_FAILURE, "invalid speed for swave: %u\n", speed);
82	}
83
84	uart_send_cmd(fd, HCI_CMD_SWAVE_PARAM_ACCESS_SET, &cp, sizeof(cp));
85
86	/*
87	 * we wait for a HCI_EVENT_VENDOR response with "0x0b" in the
88	 * first byte (possibly corresponding to the OGF?), and the
89	 * response should contain our settings as confirmation.
90	 */
91	do {
92		n = uart_recv_ev(fd, HCI_EVENT_VENDOR, &rp, sizeof(rp));
93	} while (n != sizeof(rp) || rp.d0 != 0x0b);
94
95	if (memcmp(&cp, &rp.cp, sizeof(cp)))
96		errx(EXIT_FAILURE, "param access set failed");
97
98	/*
99	 * now send a soft reset to make those parameters used
100	 */
101	uart_send_cmd(fd, HCI_CMD_RESET, NULL, 0);
102	/* assume it succeeded? */
103
104	/* bluez also says there will be a confirmation packet
105	 * on the new baud rate - ignore that for now
106	 */
107}
108