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modem-manager: Detect presence of modem-power driver

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Quectel EG25-G modem in the Pine64 PinePhone and PinePhone Pro can be
booted with the eg25-manager (user space) or modem-power (kernel space).

We only support the eg25-manager for upgrading these modems.

Based on a patch by Dylan Van Assche <me@dylanvanassche.be>, thanks.
This commit is contained in:
Richard Hughes 2022-03-02 12:33:09 +00:00
parent 409f2be940
commit 2085a2a1c3
1 changed files with 44 additions and 0 deletions
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44
plugins/modem-manager/fu-plugin-modem-manager.c
View File

@ -18,10 +18,14 @@
/* amount of time to wait for ports of the same device being exposed by kernel */
#define FU_MM_UDEV_DEVICE_PORTS_TIMEOUT 3 /* s */
/* out-of-tree modem-power driver is unsupported */
#define MODEM_POWER_SYSFS_PATH "/sys/class/modem-power"
struct FuPluginData {
MMManager *manager;
gboolean manager_ready;
GUdevClient *udev_client;
GFileMonitor *modem_power_monitor;
guint udev_timeout_id;
/* when a device is inhibited from MM, we store all relevant details
@ -214,6 +218,18 @@ fu_plugin_mm_inhibit_device(FuPlugin *plugin, FuDevice *device, GError **error)
return TRUE;
}
static void
fu_plugin_mm_ensure_modem_power_inhibit(FuPlugin *plugin, FuDevice *device)
{
if (g_file_test(MODEM_POWER_SYSFS_PATH, G_FILE_TEST_EXISTS)) {
fu_device_inhibit(device,
"modem-power",
"The modem-power kernel driver cannot be used");
} else {
fu_device_uninhibit(device, "modem-power");
}
}
static void
fu_plugin_mm_device_add(FuPlugin *plugin, MMObject *modem)
{
@ -233,6 +249,7 @@ fu_plugin_mm_device_add(FuPlugin *plugin, MMObject *modem)
g_warning("failed to probe MM device: %s", error->message);
return;
}
fu_plugin_mm_ensure_modem_power_inhibit(plugin, FU_DEVICE(dev));
fu_plugin_device_add(plugin, FU_DEVICE(dev));
fu_plugin_cache_add(plugin, object_path, dev);
fu_plugin_cache_add(plugin, fu_device_get_physical_id(FU_DEVICE(dev)), dev);
@ -346,11 +363,27 @@ fu_plugin_mm_coldplug(FuPlugin *plugin, GError **error)
return TRUE;
}
static void
fu_plugin_mm_modem_power_changed_cb(GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
FuPlugin *plugin = FU_PLUGIN(user_data);
GPtrArray *devices = fu_plugin_get_devices(plugin);
for (guint i = 0; i < devices->len; i++) {
FuDevice *device = g_ptr_array_index(devices, i);
fu_plugin_mm_ensure_modem_power_inhibit(plugin, device);
}
}
static gboolean
fu_plugin_mm_startup(FuPlugin *plugin, GError **error)
{
FuPluginData *priv = fu_plugin_get_data(plugin);
g_autoptr(GDBusConnection) connection = NULL;
g_autoptr(GFile) file = g_file_new_for_path(MODEM_POWER_SYSFS_PATH);
connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, error);
if (connection == NULL)
@ -362,6 +395,15 @@ fu_plugin_mm_startup(FuPlugin *plugin, GError **error)
if (priv->manager == NULL)
return FALSE;
/* detect presence of unsupported modem-power driver */
priv->modem_power_monitor = g_file_monitor(file, G_FILE_MONITOR_NONE, NULL, error);
if (priv->modem_power_monitor == NULL)
return FALSE;
g_signal_connect(priv->modem_power_monitor,
"changed",
G_CALLBACK(fu_plugin_mm_modem_power_changed_cb),
plugin);
return TRUE;
}
@ -384,6 +426,8 @@ fu_plugin_mm_destroy(FuPlugin *plugin)
g_object_unref(priv->udev_client);
if (priv->manager != NULL)
g_object_unref(priv->manager);
if (priv->modem_power_monitor != NULL)
g_object_unref(priv->modem_power_monitor);
}
static gboolean