source: mainline/uspace/app/usbinfo/main.c@ e387d0f

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

        /* Hack for QEMU to save-up on typing ;-). */
        if (str_cmp(devpath, "qemu") == 0) {
                devpath = "/hw/pci0/00:01.2/uhci-rh/usb00_a1";
        }

        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;
        }
}

static void print_usage(char *app_name)
{
#define _INDENT "      "
#define _OPTION(opt, description) \
        printf(_INDENT opt "\n" _INDENT _INDENT description "\n")

        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");

        _OPTION("-h --help", "Print this help and exit.");
        _OPTION("-i --identification", "Brief device identification.");
        _OPTION("-m --match-ids", "Print match ids generated for the device.");
        _OPTION("-t --descriptor-tree", "Print descriptor tree.");
        _OPTION("-T --descriptor-tree-full", "Print detailed descriptor tree");
        _OPTION("-s --strings", "Try to print all string descriptors.");

        printf("\n");
        printf("If no option is specified, `-i' is considered default.\n");
        printf("\n");

#undef _OPTION
#undef _INDENT
}

static struct option long_options[] = {
        {"help", no_argument, NULL, 'h'},
        {"identification", no_argument, NULL, 'i'},
        {"match-ids", no_argument, NULL, 'm'},
        {"descriptor-tree", no_argument, NULL, 't'},
        {"descriptor-tree-full", no_argument, NULL, 'T'},
        {"strings", no_argument, NULL, 's'},
        {0, 0, NULL, 0}
};
static const char *short_options = "himtTs";

static usbinfo_action_t actions[] = {
        {
                .opt = 'i',
                .action = dump_short_device_identification,
                .active = false
        },
        {
                .opt = 'm',
                .action = dump_device_match_ids,
                .active = false
        },
        {
                .opt = 't',
                .action = dump_descriptor_tree_brief,
                .active = false
        },
        {
                .opt = 'T',
                .action = dump_descriptor_tree_full,
                .active = false
        },
        {
                .opt = 's',
                .action = dump_strings,
                .active = false
        },
        {
                .opt = 0
        }
};

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.
         */
        int opt;
        do {
                opt = getopt_long(argc, argv,
                    short_options, long_options, NULL);
                switch (opt) {
                        case -1:
                                break;
                        case '?':
                                print_usage(argv[0]);
                                return 1;
                        case 'h':
                                print_usage(argv[0]);
                                return 0;
                        default: {
                                int idx = 0;
                                while (actions[idx].opt != 0) {
                                        if (actions[idx].opt == opt) {
                                                actions[idx].active = true;
                                                break;
                                        }
                                        idx++;
                                }
                                break;
                        }
                }
        } while (opt > 0);

        /* Set the default action. */
        int idx = 0;
        bool something_active = false;
        while (actions[idx].opt != 0) {
                if (actions[idx].active) {
                        something_active = true;
                        break;
                }
                idx++;
        }
        if (!something_active) {
                actions[0].active = true;
        }

        /*
         * Go through all devices given on the command line and run the
         * specified actions.
         */
        int i;
        for (i = optind; 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;
                }

                usbinfo_device_t *dev = prepare_device(hc_handle, dev_addr);
                if (dev == NULL) {
                        continue;
                }

                /* Run actions the user specified. */
                printf("%s\n", devpath);

                int action = 0;
                while (actions[action].opt != 0) {
                        if (actions[action].active) {
                                actions[action].action(dev);
                        }
                        action++;
                }

                /* Destroy the control pipe (close the session etc.). */
                destroy_device(dev);
        }

        return 0;
}


/** @}
 */