source: mainline/uspace/app/usbinfo/main.c@ 7ffe82f

/*
 * Copyright (c) 2010-2011 Vojtech Horky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * 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.
 */

/** @addtogroup usbinfo
 * @{
 */
/**
 * @file
 * USB querying.
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <str_error.h>
#include <bool.h>
#include <getopt.h>
#include <devman.h>
#include <devmap.h>
#include <usb/usbdevice.h>
#include <usb/pipes.h>
#include "usbinfo.h"

static void print_usage(char *app_name)
{
#define INDENT "      "
        printf(NAME ": query USB devices for descriptors\n\n");
        printf("Usage: %s [options] device [device [device [ ... ]]]\n",
            app_name);
        printf(INDENT "The device is a devman path to the device.\n");
        printf("\n");
#undef INDENT
}

static bool resolve_hc_handle_and_dev_addr(const char *devpath,
    devman_handle_t *out_hc_handle, usb_address_t *out_device_address)
{
        int rc;

        char *path = str_dup(devpath);
        if (path == NULL) {
                return ENOMEM;
        }

        devman_handle_t hc = 0;
        bool hc_found = false;
        usb_address_t addr = 0;
        bool addr_found = false;

        /* Remove suffixes and hope that we will encounter device node. */
        while (str_length(path) > 0) {
                /* Get device handle first. */
                devman_handle_t dev_handle;
                rc = devman_device_get_handle(path, &dev_handle, 0);
                if (rc != EOK) {
                        free(path);
                        return false;
                }

                /* Try to find its host controller. */
                if (!hc_found) {
                        rc = usb_hc_find(dev_handle, &hc);
                        if (rc == EOK) {
                                hc_found = true;
                        }
                }
                /* Try to get its address. */
                if (!addr_found) {
                        addr = usb_device_get_assigned_address(dev_handle);
                        if (addr >= 0) {
                                addr_found = true;
                        }
                }

                /* Speed-up. */
                if (hc_found && addr_found) {
                        break;
                }

                /* Remove the last suffix. */
                char *slash_pos = str_rchr(path, '/');
                if (slash_pos != NULL) {
                        *slash_pos = 0;
                }
        }

        free(path);

        if (hc_found && addr_found) {
                if (out_hc_handle != NULL) {
                        *out_hc_handle = hc;
                }
                if (out_device_address != NULL) {
                        *out_device_address = addr;
                }
                return true;
        } else {
                return false;
        }
}

int main(int argc, char *argv[])
{
        if (argc <= 1) {
                print_usage(argv[0]);
                return -1;
        }

        /*
         * Process command-line options. They determine what shall be
         * done with the device.
         */

        /* TODO */

        /*
         * Go through all devices given on the command line and run the
         * specified actions.
         */
        int i;
        for (i = 1; i < argc; i++) {
                char *devpath = argv[i];

                /* The initialization is here only to make compiler happy. */
                devman_handle_t hc_handle = 0;
                usb_address_t dev_addr = 0;
                bool found = resolve_hc_handle_and_dev_addr(devpath,
                    &hc_handle, &dev_addr);
                if (!found) {
                        fprintf(stderr, NAME ": device `%s' not found "
                            "or not of USB kind, skipping.\n",
                            devpath);
                        continue;
                }

                printf("Device `%s':\n------------\n", devpath);
                dump_device(hc_handle, dev_addr);
        }

        return 0;
}


/** @}
 */