[PATCH] location: support updating the GPS refresh time

Dan Williams dcbw at redhat.com
Mon Dec 14 11:50:19 PST 2015


On Thu, 2015-12-10 at 23:49 +0100, Aleksander Morgado wrote:
> The default setup uses a refresh time of 30s, which means that even
> if the GPS
> location updates are received at a higher frequency, the DBus
> interface will
> still expose at most one update every 30s.
> 
> This patch includes a new "SetGpsRefreshTime()" method in the
> Location
> interface, which takes a single 'u' parameter, specifying the refresh
> rate to
> use, in seconds. This method also allows 0 being passed, which will
> make the
> implementation to publish the GPS location updates are soon as
> ModemManager
> detects them.

Looks mostly good.  Though I did get an error attempting to disable a
my QMI-based E397 while location gathering was active, which probably
wasn't caused by this specific patch:

ModemManager[28430]: <debug> [1450122321.042945] [mm-broadband-modem
-qmi.c:8470] location_event_report_indication_cb(): [NMEA]
$GPGSA,A,2,<stuff>

ModemManager[28430]: <debug> [1450122321.348501] [mm-broadband
-modem.c:8637] iface_modem_location_disable_ready(): Couldn't disable
interface: 'Couldn't disable location 'gps-nmea' gathering: QMI
operation failed: Transaction timed out'
ModemManager[28430]: [/dev/cdc-wdm1] Received message...

<more GPS indications>
<try 'mmcli -m 1 -d' again>

ModemManager[28430]: <debug> [1450122356.348270] [mm-port
-serial.c:1294] _close_internal(): (ttyUSB1) device open count is 0
(close)
ModemManager[28430]: <debug> [1450122356.348314] [mm-port
-serial.c:1310] _close_internal(): (ttyUSB1) closing serial port...
ModemManager[28430]: <debug> [1450122356.348954] [mm-port
-serial.c:1359] _close_internal(): (ttyUSB1) serial port closed
ModemManager[28430]: <debug> [1450122356.349013] [mm-port
-serial.c:1294] _close_internal(): (ttyUSB2) device open count is 0
(close)
ModemManager[28430]: <debug> [1450122356.349050] [mm-port
-serial.c:1310] _close_internal(): (ttyUSB2) closing serial port...
ModemManager[28430]: <debug> [1450122356.349551] [mm-port
-serial.c:1359] _close_internal(): (ttyUSB2) serial port closed
ModemManager[28430]: <info>  [1450122356.349624] [mm-iface
-modem.c:1431] __iface_modem_update_state_internal(): Modem
/org/freedesktop/ModemManager1/Modem/1: state changed (disabling ->
unknown)

<still receiving location updates...>

Dan


> Along with the new method, a "GpsRefreshTime" read-only property is
> exposed
> to specify the refresh time in effect.
> 
> The new method and property will only be applicable if the device has
> GPS
> capabilities.
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=89924
> ---
>  cli/mmcli-modem-location.c                         |  93
> +++++++++++++++++-
>  docs/reference/libmm-glib/libmm-glib-sections.txt  |  10 ++
>  ...rg.freedesktop.ModemManager1.Modem.Location.xml |  21 +++++
>  libmm-glib/mm-modem-location.c                     | 103
> ++++++++++++++++++++
>  libmm-glib/mm-modem-location.h                     |  15 +++
>  src/mm-iface-modem-location.c                      | 104
> ++++++++++++++++++++-
>  6 files changed, 339 insertions(+), 7 deletions(-)
> 
> diff --git a/cli/mmcli-modem-location.c b/cli/mmcli-modem-location.c
> index 650ff75..ecfc0ef 100644
> --- a/cli/mmcli-modem-location.c
> +++ b/cli/mmcli-modem-location.c
> @@ -64,6 +64,7 @@ static gboolean enable_gps_unmanaged_flag;
>  static gboolean disable_gps_unmanaged_flag;
>  static gboolean get_all_flag;
>  static gchar *set_supl_server_str;
> +static gchar *set_gps_refresh_rate_str;
>  
>  static GOptionEntry entries[] = {
>      { "location-status", 0, 0, G_OPTION_ARG_NONE, &status_flag,
> @@ -142,6 +143,10 @@ static GOptionEntry entries[] = {
>        "Set SUPL server address",
>        "[IP:PORT] or [URL]"
>      },
> +    { "location-set-gps-refresh-rate", 0, 0, G_OPTION_ARG_STRING,
> &set_gps_refresh_rate_str,
> +      "Set GPS refresh rate in seconds, or 0 disable the explicit
> rate.",
> +      "[RATE]"
> +    },
>      { NULL }
>  };
>  
> @@ -203,7 +208,8 @@ mmcli_modem_location_options_enabled (void)
>                      get_gps_nmea_flag +
>                      get_gps_raw_flag +
>                      get_cdma_bs_flag) +
> -                 !!set_supl_server_str);
> +                 !!set_supl_server_str +
> +                 !!set_gps_refresh_rate_str);
>  
>      if (n_actions > 1) {
>          g_printerr ("error: too many Location actions requested\n");
> @@ -269,9 +275,9 @@ print_location_status (void)
>      g_print ("\n"
>               "%s\n"
>               "  ----------------------------\n"
> -             "  Location | capabilities: '%s'\n"
> -             "           |      enabled: '%s'\n"
> -             "           |      signals: '%s'\n",
> +             "  Location |   capabilities: '%s'\n"
> +             "           |        enabled: '%s'\n"
> +             "           |        signals: '%s'\n",
>               mm_modem_location_get_path (ctx->modem_location),
>               capabilities_str,
>               enabled_str,
> @@ -280,9 +286,22 @@ print_location_status (void)
>      /* If A-GPS supported, show SUPL server setup */
>      if (mm_modem_location_get_capabilities (ctx->modem_location) &
> MM_MODEM_LOCATION_SOURCE_AGPS)
>          g_print ("  ----------------------------\n"
> -                 "  A-GPS    |  SUPL server: '%s'\n",
> +                 "  A-GPS    |    SUPL server: '%s'\n",
>                   mm_modem_location_get_supl_server (ctx
> ->modem_location));
>  
> +    /* If GPS supported, show GPS refresh rate */
> +    if (mm_modem_location_get_capabilities (ctx->modem_location) &
> (MM_MODEM_LOCATION_SOURCE_GPS_RAW |
> +                                                                   
>  MM_MODEM_LOCATION_SOURCE_GPS_NMEA)) {
> +        guint rate;
> +
> +        rate = mm_modem_location_get_gps_refresh_rate (ctx
> ->modem_location);
> +        g_print ("  ----------------------------\n");
> +        if (rate > 0)
> +            g_print ("  GPS      |  refresh rate: '%u'\n", rate);
> +        else
> +            g_print ("  GPS      |  refresh rate: disabled\n");
> +    }
> +
>      g_free (capabilities_str);
>      g_free (enabled_str);
>  }
> @@ -339,6 +358,32 @@ set_supl_server_ready (MMModemLocation
> *modem_location,
>      mmcli_async_operation_done ();
>  }
>  
> +static void
> +set_gps_refresh_rate_process_reply (gboolean result,
> +                                    const GError *error)
> +{
> +    if (!result) {
> +        g_printerr ("error: couldn't set GPS refresh rate: '%s'\n",
> +                    error ? error->message : "unknown error");
> +        exit (EXIT_FAILURE);
> +    }
> +
> +    g_print ("successfully set GPS refresh rate\n");
> +}
> +
> +static void
> +set_gps_refresh_rate_ready (MMModemLocation *modem_location,
> +                            GAsyncResult    *result)
> +{
> +    gboolean operation_result;
> +    GError *error = NULL;
> +
> +    operation_result = mm_modem_location_set_gps_refresh_rate_finish
> (modem_location, result, &error);
> +    set_gps_refresh_rate_process_reply (operation_result, error);
> +
> +    mmcli_async_operation_done ();
> +}
> +
>  static MMModemLocationSource
>  build_sources_from_flags (void)
>  {
> @@ -587,6 +632,24 @@ get_modem_ready (GObject      *source,
>          return;
>      }
>  
> +    /* Request to set GPS refresh rate? */
> +    if (set_gps_refresh_rate_str) {
> +        guint rate;
> +
> +        if (!mm_get_uint_from_str (set_gps_refresh_rate_str, &rate))
> {
> +            g_printerr ("error: couldn't set GPS refresh rate:
> invalid rate given: '%s'\n",
> +                        set_gps_refresh_rate_str);
> +            exit (EXIT_FAILURE);
> +        }
> +        g_debug ("Asynchronously setting GPS refresh rate...");
> +        mm_modem_location_set_gps_refresh_rate (ctx->modem_location,
> +                                                rate,
> +                                                ctx->cancellable,
> +                                               
>  (GAsyncReadyCallback)set_gps_refresh_rate_ready,
> +                                                NULL);
> +        return;
> +    }
> +
>      g_warn_if_reached ();
>  }
>  
> @@ -692,5 +755,25 @@ mmcli_modem_location_run_synchronous
> (GDBusConnection *connection)
>          return;
>      }
>  
> +    /* Request to set GPS refresh rate? */
> +    if (set_gps_refresh_rate_str) {
> +        gboolean result;
> +        guint rate;
> +
> +        if (!mm_get_uint_from_str (set_gps_refresh_rate_str, &rate))
> {
> +            g_printerr ("error: couldn't set GPS refresh rate:
> invalid rate given: '%s'\n",
> +                        set_gps_refresh_rate_str);
> +            exit (EXIT_FAILURE);
> +        }
> +
> +        g_debug ("Synchronously setting GPS refresh rate...");
> +        result = mm_modem_location_set_gps_refresh_rate_sync (ctx
> ->modem_location,
> +                                                              rate,
> +                                                              NULL,
> +                                                             
>  &error);
> +        set_gps_refresh_rate_process_reply (result, error);
> +        return;
> +    }
> +
>      g_warn_if_reached ();
>  }
> diff --git a/docs/reference/libmm-glib/libmm-glib-sections.txt
> b/docs/reference/libmm-glib/libmm-glib-sections.txt
> index 90c3ac4..27a98cd 100644
> --- a/docs/reference/libmm-glib/libmm-glib-sections.txt
> +++ b/docs/reference/libmm-glib/libmm-glib-sections.txt
> @@ -382,6 +382,7 @@ mm_modem_location_get_enabled
>  mm_modem_location_signals_location
>  mm_modem_location_dup_supl_server
>  mm_modem_location_get_supl_server
> +mm_modem_location_get_gps_refresh_rate
>  <SUBSECTION Methods>
>  mm_modem_location_setup
>  mm_modem_location_setup_finish
> @@ -389,6 +390,9 @@ mm_modem_location_setup_sync
>  mm_modem_location_set_supl_server
>  mm_modem_location_set_supl_server_finish
>  mm_modem_location_set_supl_server_sync
> +mm_modem_location_set_gps_refresh_rate
> +mm_modem_location_set_gps_refresh_rate_finish
> +mm_modem_location_set_gps_refresh_rate_sync
>  mm_modem_location_get_3gpp
>  mm_modem_location_get_3gpp_finish
>  mm_modem_location_get_3gpp_sync
> @@ -2046,6 +2050,7 @@ mm_gdbus_modem_location_get_location
>  mm_gdbus_modem_location_dup_location
>  mm_gdbus_modem_location_dup_supl_server
>  mm_gdbus_modem_location_get_supl_server
> +mm_gdbus_modem_location_get_gps_refresh_rate
>  <SUBSECTION Methods>
>  mm_gdbus_modem_location_call_get_location
>  mm_gdbus_modem_location_call_get_location_finish
> @@ -2056,15 +2061,20 @@ mm_gdbus_modem_location_call_setup_sync
>  mm_gdbus_modem_location_call_set_supl_server
>  mm_gdbus_modem_location_call_set_supl_server_finish
>  mm_gdbus_modem_location_call_set_supl_server_sync
> +mm_gdbus_modem_location_call_set_gps_refresh_rate
> +mm_gdbus_modem_location_call_set_gps_refresh_rate_finish
> +mm_gdbus_modem_location_call_set_gps_refresh_rate_sync
>  <SUBSECTION Private>
>  mm_gdbus_modem_location_set_capabilities
>  mm_gdbus_modem_location_set_enabled
>  mm_gdbus_modem_location_set_location
>  mm_gdbus_modem_location_set_signals_location
>  mm_gdbus_modem_location_set_supl_server
> +mm_gdbus_modem_location_set_gps_refresh_rate
>  mm_gdbus_modem_location_complete_get_location
>  mm_gdbus_modem_location_complete_setup
>  mm_gdbus_modem_location_complete_set_supl_server
> +mm_gdbus_modem_location_complete_set_gps_refresh_rate
>  mm_gdbus_modem_location_interface_info
>  mm_gdbus_modem_location_override_properties
>  <SUBSECTION Standard>
> diff --git
> a/introspection/org.freedesktop.ModemManager1.Modem.Location.xml
> b/introspection/org.freedesktop.ModemManager1.Modem.Location.xml
> index 93cf640..c38f428 100644
> --- a/introspection/org.freedesktop.ModemManager1.Modem.Location.xml
> +++ b/introspection/org.freedesktop.ModemManager1.Modem.Location.xml
> @@ -80,6 +80,20 @@
>      </method>
>  
>      <!--
> +        SetGpsRefreshRate:
> +        @rate: Rate, in seconds.
> +
> +        Set the refresh rate of the GPS information in the API. If
> not explicitly
> +        set, a default of 30s will be used.
> +
> +        The refresh rate can be set to 0 to disable it, so that
> every update reported by
> +        the modem is published in the interface.
> +    -->
> +    <method name="SetGpsRefreshRate">
> +      <arg name="rate" type="u" direction="in" />
> +    </method>
> +
> +    <!--
>          Capabilities:
>  
>          Bitmask of <link
> linkend="MMModemLocationSource">MMModemLocationSource</link>
> @@ -290,5 +304,12 @@
>      -->
>      <property name="SuplServer" type="s" access="read" />
>  
> +    <!--
> +        GpsRefreshRate:
> +
> +        Rate of refresh of the GPS information in the interface.
> +    -->
> +    <property name="GpsRefreshRate" type="u" access="read" />
> +
>    </interface>
>  </node>
> diff --git a/libmm-glib/mm-modem-location.c b/libmm-glib/mm-modem
> -location.c
> index 229d604..71b4c41 100644
> --- a/libmm-glib/mm-modem-location.c
> +++ b/libmm-glib/mm-modem-location.c
> @@ -306,6 +306,91 @@ mm_modem_location_set_supl_server_sync
> (MMModemLocation *self,
>  
>  /*******************************************************************
> **********/
>  
> +/**
> + * mm_modem_location_set_gps_refresh_rate_finish:
> + * @self: A #MMModemLocation.
> + * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback
> passed to mm_modem_location_set_gps_refresh_rate().
> + * @error: Return location for error or %NULL.
> + *
> + * Finishes an operation started with
> mm_modem_location_set_gps_refresh_rate().
> + *
> + * Returns: %TRUE if setting the GPS refresh rate was successful,
> %FALSE if @error is set.
> + */
> +gboolean
> +mm_modem_location_set_gps_refresh_rate_finish (MMModemLocation
> *self,
> +                                               GAsyncResult *res,
> +                                               GError **error)
> +{
> +    g_return_val_if_fail (MM_IS_MODEM_LOCATION (self), FALSE);
> +
> +    return mm_gdbus_modem_location_call_set_gps_refresh_rate_finish
> (MM_GDBUS_MODEM_LOCATION (self), res, error);
> +}
> +
> +/**
> + * mm_modem_location_set_gps_refresh_rate:
> + * @self: A #MMModemLocation.
> + * @rate: The GPS refresh rate, in seconds.
> + * @cancellable: (allow-none): A #GCancellable or %NULL.
> + * @callback: A #GAsyncReadyCallback to call when the request is
> satisfied or %NULL.
> + * @user_data: User data to pass to @callback.
> + *
> + * Asynchronously configures the GPS refresh rate.
> +
> + * If a 0 rate is used, the GPS location updates will be immediately
> propagated to the interface.
> + *
> + * When the operation is finished, @callback will be invoked in the
> <link linkend="g-main-context-push-thread-default">thread-default
> main loop</link> of the thread you are calling this method from.
> + * You can then call mm_modem_location_set_gps_refresh_rate_finish()
> to get the result of the operation.
> + *
> + * See mm_modem_location_set_gps_refresh_rate_sync() for the
> synchronous, blocking version of this method.
> + */
> +void
> +mm_modem_location_set_gps_refresh_rate (MMModemLocation *self,
> +                                        guint rate,
> +                                        GCancellable *cancellable,
> +                                        GAsyncReadyCallback
> callback,
> +                                        gpointer user_data)
> +{
> +    g_return_if_fail (MM_IS_MODEM_LOCATION (self));
> +
> +    mm_gdbus_modem_location_call_set_gps_refresh_rate
> (MM_GDBUS_MODEM_LOCATION (self),
> +                                                       rate,
> +                                                       cancellable,
> +                                                       callback,
> +                                                       user_data);
> +}
> +
> +/**
> + * mm_modem_location_set_gps_refresh_rate_sync:
> + * @self: A #MMModemLocation.
> + * @rate: The GPS refresh rate, in seconds.
> + * @cancellable: (allow-none): A #GCancellable or %NULL.
> + * @error: Return location for error or %NULL.
> + *
> + * Synchronously configures the GPS refresh rate.
> + *
> + * If a 0 rate is used, the GPS location updates will be immediately
> propagated to the interface.
> + *
> + * The calling thread is blocked until a reply is received. See
> mm_modem_location_set_gps_refresh_rate()
> + * for the asynchronous version of this method.
> + *
> + * Returns: %TRUE if setting the refresh rate was successful, %FALSE
> if @error is set.
> + */
> +gboolean
> +mm_modem_location_set_gps_refresh_rate_sync (MMModemLocation *self,
> +                                             guint rate,
> +                                             GCancellable
> *cancellable,
> +                                             GError **error)
> +{
> +    g_return_val_if_fail (MM_IS_MODEM_LOCATION (self), FALSE);
> +
> +    return mm_gdbus_modem_location_call_set_gps_refresh_rate_sync
> (MM_GDBUS_MODEM_LOCATION (self),
> +                                                                  
>  rate,
> +                                                                  
>  cancellable,
> +                                                                  
>  error);
> +}
> +
> +/*******************************************************************
> **********/
> +
>  static gboolean
>  build_locations (GVariant *dictionary,
>                   MMLocation3gpp **location_3gpp,
> @@ -791,6 +876,24 @@ mm_modem_location_dup_supl_server
> (MMModemLocation *self)
>  
>  /*******************************************************************
> **********/
>  
> +/**
> + * mm_modem_location_get_gps_refresh_rate:
> + * @self: A #MMModemLocation.
> + *
> + * Gets the GPS refresh rate, in seconds.
> + *
> + * Returns: The GPS refresh rate, or 0 if no fixed rate is used.
> + */
> +guint
> +mm_modem_location_get_gps_refresh_rate (MMModemLocation *self)
> +{
> +    g_return_val_if_fail (MM_IS_MODEM_LOCATION (self), 0);
> +
> +    return mm_gdbus_modem_location_get_gps_refresh_rate
> (MM_GDBUS_MODEM_LOCATION (self));
> +}
> +
> +/*******************************************************************
> **********/
> +
>  static void
>  mm_modem_location_init (MMModemLocation *self)
>  {
> diff --git a/libmm-glib/mm-modem-location.h b/libmm-glib/mm-modem
> -location.h
> index 279288d..2d806be 100644
> --- a/libmm-glib/mm-modem-location.h
> +++ b/libmm-glib/mm-modem-location.h
> @@ -79,6 +79,8 @@ gboolean             
>  mm_modem_location_signals_location (MMModemLocation *self)
>  const gchar *mm_modem_location_get_supl_server (MMModemLocation
> *self);
>  gchar       *mm_modem_location_dup_supl_server (MMModemLocation
> *self);
>  
> +guint mm_modem_location_get_gps_refresh_rate (MMModemLocation
> *self);
> +
>  void     mm_modem_location_setup        (MMModemLocation *self,
>                                           MMModemLocationSource
> sources,
>                                           gboolean signal_location,
> @@ -107,6 +109,19 @@ gboolean mm_modem_location_set_supl_server_sync 
>   (MMModemLocation *self,
>                                                     GCancellable
> *cancellable,
>                                                     GError **error);
>  
> +void     mm_modem_location_set_gps_refresh_rate       
>  (MMModemLocation *self,
> +                                                        guint rate,
> +                                                        GCancellable
> *cancellable,
> +                                                       
>  GAsyncReadyCallback callback,
> +                                                        gpointer
> user_data);
> +gboolean mm_modem_location_set_gps_refresh_rate_finish
> (MMModemLocation *self,
> +                                                        GAsyncResult
> *res,
> +                                                        GError
> **error);
> +gboolean mm_modem_location_set_gps_refresh_rate_sync  
>  (MMModemLocation *self,
> +                                                        guint rate,
> +                                                        GCancellable
> *cancellable,
> +                                                        GError
> **error);
> +
>  void            mm_modem_location_get_3gpp        (MMModemLocation
> *self,
>                                                     GCancellable
> *cancellable,
>                                                    
>  GAsyncReadyCallback callback,
> diff --git a/src/mm-iface-modem-location.c b/src/mm-iface-modem
> -location.c
> index bf1e64e..a15942d 100644
> --- a/src/mm-iface-modem-location.c
> +++ b/src/mm-iface-modem-location.c
> @@ -253,7 +253,7 @@ mm_iface_modem_location_gps_update
> (MMIfaceModemLocation *self,
>          g_assert (ctx->location_gps_nmea != NULL);
>          if (mm_location_gps_nmea_add_trace (ctx->location_gps_nmea,
> nmea_trace) &&
>              (ctx->location_gps_nmea_last_time == 0 ||
> -             time (NULL) - ctx->location_gps_nmea_last_time >=
> MM_LOCATION_GPS_REFRESH_TIME_SECS)) {
> +             time (NULL) - ctx->location_gps_nmea_last_time >=
> mm_gdbus_modem_location_get_gps_refresh_rate (skeleton))) {
>              ctx->location_gps_nmea_last_time = time (NULL);
>              update_nmea = TRUE;
>          }
> @@ -263,7 +263,7 @@ mm_iface_modem_location_gps_update
> (MMIfaceModemLocation *self,
>          g_assert (ctx->location_gps_raw != NULL);
>          if (mm_location_gps_raw_add_trace (ctx->location_gps_raw,
> nmea_trace) &&
>              (ctx->location_gps_raw_last_time == 0 ||
> -             time (NULL) - ctx->location_gps_raw_last_time >=
> MM_LOCATION_GPS_REFRESH_TIME_SECS)) {
> +             time (NULL) - ctx->location_gps_raw_last_time >=
> mm_gdbus_modem_location_get_gps_refresh_rate (skeleton))) {
>              ctx->location_gps_raw_last_time = time (NULL);
>              update_raw = TRUE;
>          }
> @@ -1029,6 +1029,91 @@ typedef struct {
>      MmGdbusModemLocation *skeleton;
>      GDBusMethodInvocation *invocation;
>      MMIfaceModemLocation *self;
> +    guint rate;
> +} HandleSetGpsRefreshRateContext;
> +
> +static void
> +handle_set_gps_refresh_rate_context_free
> (HandleSetGpsRefreshRateContext *ctx)
> +{
> +    g_object_unref (ctx->skeleton);
> +    g_object_unref (ctx->invocation);
> +    g_object_unref (ctx->self);
> +    g_slice_free (HandleSetGpsRefreshRateContext, ctx);
> +}
> +
> +static void
> +handle_set_gps_refresh_rate_auth_ready (MMBaseModem *self,
> +                                        GAsyncResult *res,
> +                                       
>  HandleSetGpsRefreshRateContext *ctx)
> +{
> +    GError *error = NULL;
> +    MMModemState modem_state;
> +
> +    if (!mm_base_modem_authorize_finish (self, res, &error)) {
> +        g_dbus_method_invocation_take_error (ctx->invocation,
> error);
> +        handle_set_gps_refresh_rate_context_free (ctx);
> +        return;
> +    }
> +
> +    modem_state = MM_MODEM_STATE_UNKNOWN;
> +    g_object_get (self,
> +                  MM_IFACE_MODEM_STATE, &modem_state,
> +                  NULL);
> +    if (modem_state < MM_MODEM_STATE_ENABLED) {
> +        g_dbus_method_invocation_return_error (ctx->invocation,
> +                                               MM_CORE_ERROR,
> +                                              
>  MM_CORE_ERROR_WRONG_STATE,
> +                                               "Cannot set SUPL
> server: "
> +                                               "device not yet
> enabled");
> +        handle_set_gps_refresh_rate_context_free (ctx);
> +        return;
> +    }
> +
> +    /* If GPS is NOT supported, set error */
> +    if (!(mm_gdbus_modem_location_get_capabilities (ctx->skeleton) &
> ((MM_MODEM_LOCATION_SOURCE_GPS_RAW |
> +                                                                    
>    MM_MODEM_LOCATION_SOURCE_GPS_NMEA)))) {
> +        g_dbus_method_invocation_return_error (ctx->invocation,
> +                                               MM_CORE_ERROR,
> +                                              
>  MM_CORE_ERROR_UNSUPPORTED,
> +                                               "Cannot set GPS
> refresh rate: GPS not supported");
> +        handle_set_gps_refresh_rate_context_free (ctx);
> +        return;
> +    }
> +
> +    /* Set the new rate in the interface */
> +    mm_gdbus_modem_location_set_gps_refresh_rate (ctx->skeleton, ctx
> ->rate);
> +    mm_gdbus_modem_location_complete_set_gps_refresh_rate (ctx
> ->skeleton, ctx->invocation);
> +    handle_set_gps_refresh_rate_context_free (ctx);
> +}
> +
> +static gboolean
> +handle_set_gps_refresh_rate (MmGdbusModemLocation *skeleton,
> +                             GDBusMethodInvocation *invocation,
> +                             guint rate,
> +                             MMIfaceModemLocation *self)
> +{
> +    HandleSetGpsRefreshRateContext *ctx;
> +
> +    ctx = g_slice_new (HandleSetGpsRefreshRateContext);
> +    ctx->skeleton = g_object_ref (skeleton);
> +    ctx->invocation = g_object_ref (invocation);
> +    ctx->self = g_object_ref (self);
> +    ctx->rate = rate;
> +
> +    mm_base_modem_authorize (MM_BASE_MODEM (self),
> +                             invocation,
> +                             MM_AUTHORIZATION_DEVICE_CONTROL,
> +                            
>  (GAsyncReadyCallback)handle_set_gps_refresh_rate_auth_ready,
> +                             ctx);
> +    return TRUE;
> +}
> +
> +/*******************************************************************
> **********/
> +
> +typedef struct {
> +    MmGdbusModemLocation *skeleton;
> +    GDBusMethodInvocation *invocation;
> +    MMIfaceModemLocation *self;
>  } HandleGetLocationContext;
>  
>  static void
> @@ -1362,6 +1447,7 @@ typedef enum {
>      INITIALIZATION_STEP_CAPABILITIES,
>      INITIALIZATION_STEP_VALIDATE_CAPABILITIES,
>      INITIALIZATION_STEP_SUPL_SERVER,
> +    INITIALIZATION_STEP_GPS_REFRESH_RATE,
>      INITIALIZATION_STEP_LAST
>  } InitializationStep;
>  
> @@ -1497,6 +1583,16 @@ interface_initialization_step
> (InitializationContext *ctx)
>          /* Fall down to next step */
>          ctx->step++;
>  
> +    case INITIALIZATION_STEP_GPS_REFRESH_RATE:
> +        /* If we have GPS capabilities, expose the GPS refresh rate
> */
> +        if (ctx->capabilities & ((MM_MODEM_LOCATION_SOURCE_GPS_RAW |
> +                                 
>  MM_MODEM_LOCATION_SOURCE_GPS_NMEA)))
> +            /* Set the default rate in the interface */
> +            mm_gdbus_modem_location_set_gps_refresh_rate (ctx
> ->skeleton, MM_LOCATION_GPS_REFRESH_TIME_SECS);
> +
> +        /* Fall down to next step */
> +        ctx->step++;
> +
>      case INITIALIZATION_STEP_LAST:
>          /* We are done without errors! */
>  
> @@ -1510,6 +1606,10 @@ interface_initialization_step
> (InitializationContext *ctx)
>                            G_CALLBACK (handle_set_supl_server),
>                            ctx->self);
>          g_signal_connect (ctx->skeleton,
> +                          "handle-set-gps-refresh-rate",
> +                          G_CALLBACK (handle_set_gps_refresh_rate),
> +                          ctx->self);
> +        g_signal_connect (ctx->skeleton,
>                            "handle-get-location",
>                            G_CALLBACK (handle_get_location),
>                            ctx->self);


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