xref: /src/usr.sbin/btattach/init_bcm2035.c

/*	$NetBSD: init_bcm2035.c,v 1.3 2015/06/16 23:04:14 christos Exp $	*/

/*-
 * Copyright (c) 2008 Iain Hibbert
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * init information in this file gleaned from hciattach(8)
 * command from BlueZ for Linux - see http://www.bluez.org/
 */

#include <sys/cdefs.h>
__RCSID("$NetBSD: init_bcm2035.c,v 1.3 2015/06/16 23:04:14 christos Exp $");

#include <bluetooth.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <termios.h>

#include "btattach.h"

#define HCI_CMD_BCM2035_SET_UART_BAUD_RATE	\
	HCI_OPCODE(HCI_OGF_VENDOR, 0x018)

#define HCI_CMD_BCM2035_SET_BDADDR		\
	HCI_OPCODE(HCI_OGF_VENDOR, 0x001)

void
init_bcm2035(int fd, unsigned int speed)
{
	uint16_t rate;

	uart_send_cmd(fd, HCI_CMD_RESET, NULL, 0);

	uart_recv_cc(fd, HCI_CMD_RESET, NULL, 0);
	/* assume it succeeded? */

	/* can also set the bdaddr */

	switch(speed) {
	case B57600:	rate = 0xe600;	break;
	case B115200:	rate = 0xf300;	break;
	case B230400:	rate = 0xfa22;	break;
	case B460800:	rate = 0xfd22;	break;
	case B921600:	rate = 0xff55;	break;
	default:
		errx(EXIT_FAILURE, "invalid speed for bcm2035: %u", speed);
	};

	rate = htole16(rate);
	uart_send_cmd(fd, HCI_CMD_BCM2035_SET_UART_BAUD_RATE, &rate, sizeof(rate));
	uart_recv_cc(fd, HCI_CMD_BCM2035_SET_UART_BAUD_RATE, NULL, 0);
	/* assume it succeeded? */
}