108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/* $NetBSD: init_swave.c,v 1.3 2010/03/09 02:01:51 kiyohara Exp $ */
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/*-
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* Copyright (c) 2008 Iain Hibbert
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* init information in this file gleaned from hciattach(8)
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* command from BlueZ for Linux - see http://www.bluez.org/
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: init_swave.c,v 1.3 2010/03/09 02:01:51 kiyohara Exp $");
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#include <bluetooth.h>
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#include <err.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include "btattach.h"
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#define HCI_CMD_SWAVE_PARAM_ACCESS_SET \
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HCI_OPCODE(HCI_OGF_VENDOR, 0x00b)
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typedef struct {
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uint8_t sub_command;
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uint8_t param_type;
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uint8_t param_length;
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uint8_t transport_flow;
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uint8_t transport_type;
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uint8_t transport_rate;
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} __attribute__ ((__packed__)) hci_param_access_set_cp;
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typedef struct {
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uint8_t d0; /* ? */
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hci_param_access_set_cp cp;
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} __attribute__ ((__packed__)) hci_param_access_set_rp;
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void
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init_swave(int fd, unsigned int speed)
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{
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hci_param_access_set_cp cp;
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hci_param_access_set_rp rp;
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size_t n;
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cp.sub_command = 0x01; /* set */
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cp.param_type = 0x11; /* HCI Transport */
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cp.param_length = 0x03;
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cp.transport_flow = 0x01; /* flow control */
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cp.transport_type = 0x01; /* UART */
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switch(speed) {
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case B19200: cp.transport_rate = 0x03; break;
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case B38400: cp.transport_rate = 0x02; break;
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case B57600: cp.transport_rate = 0x01; break;
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case B115200: cp.transport_rate = 0x00; break;
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default:
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errx(EXIT_FAILURE, "invalid speed for swave: %u\n", speed);
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}
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uart_send_cmd(fd, HCI_CMD_SWAVE_PARAM_ACCESS_SET, &cp, sizeof(cp));
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/*
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* we wait for a HCI_EVENT_VENDOR response with "0x0b" in the
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* first byte (possibly corresponding to the OGF?), and the
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* response should contain our settings as confirmation.
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*/
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do {
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n = uart_recv_ev(fd, HCI_EVENT_VENDOR, &rp, sizeof(rp));
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} while (n != sizeof(rp) || rp.d0 != 0x0b);
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if (memcmp(&cp, &rp.cp, sizeof(cp)))
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errx(EXIT_FAILURE, "param access set failed");
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/*
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* now send a soft reset to make those parameters used
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*/
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uart_send_cmd(fd, HCI_CMD_RESET, NULL, 0);
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/* assume it succeeded? */
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/* bluez also says there will be a confirmation packet
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* on the new baud rate - ignore that for now
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*/
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}
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