ModemManager/plugins/mm-plugin-generic.c

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details:
 *
 * Copyright (C) 2008 - 2009 Dan Williams <dcbw@redhat.com>
 */

#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <time.h>

#include <gmodule.h>

#include "mm-plugin-generic.h"
#include "mm-generic-gsm.h"
#include "mm-generic-cdma.h"
#include "mm-errors.h"
#include "mm-serial-parsers.h"

G_DEFINE_TYPE (MMPluginGeneric, mm_plugin_generic, MM_TYPE_PLUGIN_BASE)

int mm_plugin_major_version = MM_PLUGIN_MAJOR_VERSION;
int mm_plugin_minor_version = MM_PLUGIN_MINOR_VERSION;

G_MODULE_EXPORT MMPlugin *
mm_plugin_create (void)
{
    return MM_PLUGIN (g_object_new (MM_TYPE_PLUGIN_GENERIC,
                                    MM_PLUGIN_BASE_NAME, MM_PLUGIN_GENERIC_NAME,
                                    NULL));
}

/*****************************************************************************/

#define CAP_CDMA (MM_PLUGIN_BASE_PORT_CAP_IS707_A | \
                  MM_PLUGIN_BASE_PORT_CAP_IS707_P | \
                  MM_PLUGIN_BASE_PORT_CAP_IS856 | \
                  MM_PLUGIN_BASE_PORT_CAP_IS856_A)

static guint32
get_level_for_capabilities (guint32 capabilities)
{
    if (capabilities & MM_PLUGIN_BASE_PORT_CAP_GSM)
        return 5;
    if (capabilities & CAP_CDMA)
        return 5;
    return 0;
}

static void
probe_result (MMPluginBase *base,
              MMPluginBaseSupportsTask *task,
              guint32 capabilities,
              gpointer user_data)
{
    mm_plugin_base_supports_task_complete (task, get_level_for_capabilities (capabilities));
}

static MMPluginSupportsResult
supports_port (MMPluginBase *base,
               MMModem *existing,
               MMPluginBaseSupportsTask *task)
{
    GUdevDevice *port;
    guint32 cached = 0, level;

    /* Can't do anything with non-serial ports */
    port = mm_plugin_base_supports_task_get_port (task);
    if (strcmp (g_udev_device_get_subsystem (port), "tty"))
        return MM_PLUGIN_SUPPORTS_PORT_UNSUPPORTED;

    if (mm_plugin_base_get_cached_port_capabilities (base, port, &cached)) {
        level = get_level_for_capabilities (cached);
        if (level) {
            mm_plugin_base_supports_task_complete (task, level);
            return MM_PLUGIN_SUPPORTS_PORT_IN_PROGRESS;
        }
        return MM_PLUGIN_SUPPORTS_PORT_UNSUPPORTED;
    }

    /* Otherwise kick off a probe */
    if (mm_plugin_base_probe_port (base, task, NULL))
        return MM_PLUGIN_SUPPORTS_PORT_IN_PROGRESS;

    return MM_PLUGIN_SUPPORTS_PORT_UNSUPPORTED;
}

static MMModem *
grab_port (MMPluginBase *base,
           MMModem *existing,
           MMPluginBaseSupportsTask *task,
           GError **error)
{
    GUdevDevice *port = NULL, *physdev = NULL;
    MMModem *modem = NULL;
    const char *name, *subsys, *devfile, *sysfs_path;
    guint32 caps;

    port = mm_plugin_base_supports_task_get_port (task);
    g_assert (port);

    devfile = g_udev_device_get_device_file (port);
    if (!devfile) {
        g_set_error (error, 0, 0, "Could not get port's sysfs file.");
        return NULL;
    }

    physdev = mm_plugin_base_supports_task_get_physdev (task);
    g_assert (physdev);
    sysfs_path = g_udev_device_get_sysfs_path (physdev);
    if (!sysfs_path) {
        g_set_error (error, 0, 0, "Could not get port's physical device sysfs path.");
        return NULL;
    }

    subsys = g_udev_device_get_subsystem (port);
    name = g_udev_device_get_name (port);

    caps = mm_plugin_base_supports_task_get_probed_capabilities (task);
    if (!existing) {
        if (caps & MM_PLUGIN_BASE_PORT_CAP_GSM) {
            modem = mm_generic_gsm_new (sysfs_path,
                                        mm_plugin_base_supports_task_get_driver (task),
                                        mm_plugin_get_name (MM_PLUGIN (base)));
        } else if (caps & CAP_CDMA) {
            modem = mm_generic_cdma_new (sysfs_path,
                                         mm_plugin_base_supports_task_get_driver (task),
                                         mm_plugin_get_name (MM_PLUGIN (base)));
        }

        if (modem) {
            if (!mm_modem_grab_port (modem, subsys, name, NULL, error)) {
                g_object_unref (modem);
                return NULL;
            }
        }
    } else {
        if (caps & (MM_PLUGIN_BASE_PORT_CAP_GSM | CAP_CDMA)) {
            modem = existing;
            if (!mm_modem_grab_port (modem, subsys, name, NULL, error))
                return NULL;
        }
    }

    return modem;
}

/*****************************************************************************/

static void
mm_plugin_generic_init (MMPluginGeneric *self)
{
    g_signal_connect (self, "probe-result", G_CALLBACK (probe_result), NULL);
}

static void
mm_plugin_generic_class_init (MMPluginGenericClass *klass)
{
    MMPluginBaseClass *pb_class = MM_PLUGIN_BASE_CLASS (klass);

    pb_class->supports_port = supports_port;
    pb_class->grab_port = grab_port;
}