NetBSD/usr.sbin/btattach/init_swave.c

108 lines
3.4 KiB
C

/* $NetBSD: init_swave.c,v 1.3 2010/03/09 02:01:51 kiyohara 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_swave.c,v 1.3 2010/03/09 02:01:51 kiyohara Exp $");
#include <bluetooth.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include "btattach.h"
#define HCI_CMD_SWAVE_PARAM_ACCESS_SET \
HCI_OPCODE(HCI_OGF_VENDOR, 0x00b)
typedef struct {
uint8_t sub_command;
uint8_t param_type;
uint8_t param_length;
uint8_t transport_flow;
uint8_t transport_type;
uint8_t transport_rate;
} __attribute__ ((__packed__)) hci_param_access_set_cp;
typedef struct {
uint8_t d0; /* ? */
hci_param_access_set_cp cp;
} __attribute__ ((__packed__)) hci_param_access_set_rp;
void
init_swave(int fd, unsigned int speed)
{
hci_param_access_set_cp cp;
hci_param_access_set_rp rp;
size_t n;
cp.sub_command = 0x01; /* set */
cp.param_type = 0x11; /* HCI Transport */
cp.param_length = 0x03;
cp.transport_flow = 0x01; /* flow control */
cp.transport_type = 0x01; /* UART */
switch(speed) {
case B19200: cp.transport_rate = 0x03; break;
case B38400: cp.transport_rate = 0x02; break;
case B57600: cp.transport_rate = 0x01; break;
case B115200: cp.transport_rate = 0x00; break;
default:
errx(EXIT_FAILURE, "invalid speed for swave: %u\n", speed);
}
uart_send_cmd(fd, HCI_CMD_SWAVE_PARAM_ACCESS_SET, &cp, sizeof(cp));
/*
* we wait for a HCI_EVENT_VENDOR response with "0x0b" in the
* first byte (possibly corresponding to the OGF?), and the
* response should contain our settings as confirmation.
*/
do {
n = uart_recv_ev(fd, HCI_EVENT_VENDOR, &rp, sizeof(rp));
} while (n != sizeof(rp) || rp.d0 != 0x0b);
if (memcmp(&cp, &rp.cp, sizeof(cp)))
errx(EXIT_FAILURE, "param access set failed");
/*
* now send a soft reset to make those parameters used
*/
uart_send_cmd(fd, HCI_CMD_RESET, NULL, 0);
/* assume it succeeded? */
/* bluez also says there will be a confirmation packet
* on the new baud rate - ignore that for now
*/
}