broadband-modem-mbim: add qdu firmware update check

The manufacturers can offer a firmware update file 'ota.bin' with which
the firmware can be updated in the modem via a manufacturer tool using
windows. The tool is only available for Windows and can therefore not be used
for embedded devices.

A investigation has shown that this tool updates the firmware via 'mbim-qdu'.
The update service 'fwupd' which has a 'modemmanager' plugin can install the
firmware via 'mbim-qdu'. For this to work, the ModemManager must export this
update method via the firmware interface.

As the 'mbim-qdu' is a generic update method, the check is integrated into the
'mm-broadband-modem-mbim' class. If 'mbim-qdu' update method is supported by
the mbim interface and the udev env variable 'ID_MM_MBIM_QDU' is set for this
modem, then the 'mbim-qdu' update is exported via dbus.

The following line must be added to the '77-mm-cinterion-port-types.rules'
udev rules file, for example, so that the mbim-qdu update for the 'MV31' can
be used.

ATTRS{vendor}=="0x1e2d", ATTRS{device}=="0x00b3", ENV{ID_MM_MBIM_QDU}="1"

This is the corresponding output of the 'mmcli' command to show the supported
update method for the 'MV31'.

root@G3-10940 ~ # mmcli -m Modem1 --firmware-status
  Firmware |     method: mbim-qdu
           | device ids: USB\VID_1E2D&PID_00B3&REV_0414&CARRIER_GCF
           |             USB\VID_1E2D&PID_00B3&REV_0414
           |             USB\VID_1E2D&PID_00B3
           |             USB\VID_1E2D
           |    version: T99W175.F0.1.0.0.9.GC.004.063 - 0A000804

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/mm-broadband-modem-mbim.c b/src/mm-broadband-modem-mbim.c
index 9957fe9e..a7dc8dca 100644
--- a/src/mm-broadband-modem-mbim.c
+++ b/src/mm-broadband-modem-mbim.c
@@ -153,6 +153,7 @@ struct _MMBroadbandModemMbimPrivate {
     gboolean is_ms_sar_supported;
     gboolean is_google_carrier_lock_supported;
     gboolean is_ms_device_reset_supported;
+    gboolean is_qdu_supported;
 
     /* Process unsolicited notifications */
     gulong                  notification_id;
@@ -3537,6 +3538,12 @@ query_device_services_ready (MbimDevice   *device,
                 continue;
             }
 
+            if (service == MBIM_SERVICE_QDU) {
+                mm_obj_dbg (self, "Qualcomm Device Upgrade method mbim-qdu supported");
+                self->priv->is_qdu_supported = TRUE;
+                continue;
+            }
+
             /* no optional features to check in remaining services */
         }
         mbim_device_service_element_array_free (device_services);
@@ -10380,11 +10387,43 @@ modem_firmware_load_update_settings_finish (MMIfaceModemFirmware  *self,
     return mm_iface_modem_firmware_load_update_settings_in_port_finish (self, res, error);
 }
 
+static gboolean
+modem_is_qdu_supported (MMBaseModem    *modem,
+                        MMKernelDevice *kernel_device)
+{
+    return mm_kernel_device_get_global_property_as_boolean (kernel_device, "ID_MM_MBIM_QDU");
+}
+
 static void
 modem_firmware_load_update_settings (MMIfaceModemFirmware *self,
                                      GAsyncReadyCallback   callback,
                                      gpointer              user_data)
 {
+    GTask                               *task;
+    MMPortMbim                          *mbim_port;
+    MMKernelDevice                      *kernel_device;
+    MMModemFirmwareUpdateMethod          update_methods;
+    g_autoptr(MMFirmwareUpdateSettings)  update_settings = NULL;
+
+    /* Check first if 'mbim-qdu' is supported and selected via udev. If the
+     * update method 'mbim-qdu' is not supported and not selected via udev,
+     * then the generic update method 'firehose/sahara' are checked.
+     */
+    update_methods = MM_MODEM_FIRMWARE_UPDATE_METHOD_NONE;
+    mbim_port = mm_broadband_modem_mbim_peek_port_mbim (MM_BROADBAND_MODEM_MBIM (self));
+    if (mbim_port) {
+        kernel_device = mm_port_peek_kernel_device (MM_PORT (mbim_port));
+        if ((MM_BROADBAND_MODEM_MBIM (self)->priv->is_qdu_supported) &&
+            modem_is_qdu_supported (MM_BASE_MODEM (self), kernel_device)) {
+            task = g_task_new (self, NULL, callback, user_data);
+            update_settings = mm_firmware_update_settings_new (update_methods);
+            mm_firmware_update_settings_set_method (update_settings, MM_MODEM_FIRMWARE_UPDATE_METHOD_MBIM_QDU);
+            g_task_return_pointer (task, g_object_ref (update_settings), (GDestroyNotify) g_object_unref);
+            g_object_unref (task);
+            return;
+        }
+    }
+
     mm_iface_modem_firmware_load_update_settings_in_port (
         self,
         MM_PORT (mm_broadband_modem_mbim_peek_port_mbim (MM_BROADBAND_MODEM_MBIM (self))),