avctrl.c

Bluezan implementation of the Bluetooth&#8482 wireless standards specifications for Linux. The code

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2005  Marcel Holtmann <[e-mail]>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation;
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
 *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
 *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
 *  SOFTWARE IS DISCLAIMED.
 *
 *
 *  $Id: avctrl.c,v 1.1 2005/07/03 10:42:57 holtmann Exp $
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>

#include <usb.h>

#ifdef NEED_USB_GET_BUSSES
static inline struct usb_bus *usb_get_busses(void)
{
	return usb_busses;
}
#endif

#ifndef USB_DIR_OUT
#define USB_DIR_OUT	0x00
#endif

#ifndef USB_DIR_IN
#define USB_DIR_IN	0x80
#endif

#define HID_REQ_GET_REPORT	0x01
#define HID_REQ_GET_IDLE	0x02
#define HID_REQ_GET_PROTOCOL	0x03
#define HID_REQ_SET_REPORT	0x09
#define HID_REQ_SET_IDLE	0x0a
#define HID_REQ_SET_PROTOCOL	0x0b

struct device_info;

struct device_id {
	uint16_t vendor;
	uint16_t product;
	int (*func)(struct device_info *dev);
};

struct device_info {
	struct usb_device *dev;
	struct device_id *id;
};

#define GET_STATE		0x01
#define GET_REMOTE_BDADDR	0x02
#define DISCOVER		0x03
#define SWITCH_TO_DFU		0x04
#define READ_CODEC		0x05

static int dongle_csr(struct device_info *devinfo)
{
	unsigned char buf[8];
	struct usb_dev_handle *udev;
	int err, intf = 2;

	udev = usb_open(devinfo->dev);
	if (!udev)
		return -errno;

	if (usb_claim_interface(udev, intf) < 0) {
		err = -errno;
		usb_close(udev);
		return err;
	}

	memset(buf, 0, sizeof(buf));
	buf[0] = SWITCH_TO_DFU;

	err = usb_control_msg(udev, USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
				HID_REQ_SET_REPORT, 0x03 << 8, intf, buf, sizeof(buf), 10000);

	if (err == 0) {
		err = -1;
		errno = EALREADY;
	} else {
		if (errno == ETIMEDOUT)
			err = 0;
	}

	usb_release_interface(udev, intf);
	usb_close(udev);

	return err;
}

static struct device_id device_list[] = {
	{ 0x0a12, 0x1004, dongle_csr },
	{ -1 }
};

static struct device_id *match_device(uint16_t vendor, uint16_t product)
{
	int i;

	for (i = 0; device_list[i].func; i++) {
		if (vendor == device_list[i].vendor &&
				product == device_list[i].product)
			return &device_list[i];
	}

	return NULL;
}

static int find_devices(struct device_info *devinfo, size_t size)
{
	struct usb_bus *bus;
	struct usb_device *dev;
	struct device_id *id;
	int count = 0;

	usb_find_busses();
	usb_find_devices();

	for (bus = usb_get_busses(); bus; bus = bus->next)
		for (dev = bus->devices; dev; dev = dev->next) {
			id = match_device(dev->descriptor.idVendor,
						dev->descriptor.idProduct);
			if (!id)
				continue;

			if (count < size) {
				devinfo[count].dev = dev;
				devinfo[count].id = id;
				count++;
			}
		}

	return count;
}

static void usage(void)
{
	printf("avctrl - Bluetooth Audio/Video control utility\n\n");

	printf("Usage:\n"
		"\tavctrl [options]\n"
		"\n");

	printf("Options:\n"
		"\t-h, --help           Display help\n"
		"\t-q, --quiet          Don't display any messages\n"
		"\n");
}

static struct option main_options[] = {
	{ "help",	0, 0, 'h' },
	{ "quiet",	0, 0, 'q' },
	{ 0, 0, 0, 0 }
};

int main(int argc, char *argv[])
{
	struct device_info dev[16];
	int i, opt, num, quiet = 0;

	while ((opt = getopt_long(argc, argv, "+qh", main_options, NULL)) != -1) {
		switch (opt) {
		case 'q':
			quiet = 1;
			break;
		case 'h':
			usage();
			exit(0);
		default:
			exit(0);
		}
	}

	argc -= optind;
	argv += optind;
	optind = 0;

	usb_init();

	num = find_devices(dev, sizeof(dev) / sizeof(dev[0]));
	if (num <= 0) {
		if (!quiet)
			fprintf(stderr, "No Audio/Video devices found\n");
		exit(1);
	}

	for (i = 0; i < num; i++) {
		struct device_id *id = dev[i].id;

		if (!quiet)
			printf("Switching device %04x:%04x ",
						id->vendor, id->product);
		fflush(stdout);

		if (id->func(&dev[i]) < 0) {
			if (!quiet)
				printf("failed (%s)\n", strerror(errno));
		} else {
			if (!quiet)
				printf("was successful\n");
		}
	}

	return 0;
}