qmi-firmware-update: new QfuUpdater with the core upgrade logic

Initially, load sysfs path and setup state machine.

1 files changed, 110 insertions, 0 deletions

diff --git a/src/qmi-firmware-update/qfu-udev-helpers.c b/src/qmi-firmware-update/qfu-udev-helpers.c
new file mode 100644
index 0000000..32d8e48
--- /dev/null
+++ b/src/qmi-firmware-update/qfu-udev-helpers.c
@@ -0,0 +1,110 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * qmi-firmware-update -- Command line tool to update firmware in QMI devices
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright (C) 2016 Zodiac Inflight Innovations
+ * Copyright (C) 2016 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#include <gio/gio.h>
+#include <gudev/gudev.h>
+
+#include "qfu-udev-helpers.h"
+
+gchar *
+qfu_udev_helper_get_udev_device_sysfs_path (GUdevDevice  *device,
+                                            GError      **error)
+{
+    GUdevDevice *parent;
+    gchar       *sysfs_path;
+
+    /* We need to look for the parent GUdevDevice which has a "usb_device"
+     * devtype. */
+
+    parent = g_udev_device_get_parent (device);
+    while (parent) {
+        GUdevDevice *next;
+
+        if (g_strcmp0 (g_udev_device_get_devtype (parent), "usb_device") == 0)
+            break;
+
+        /* Check next parent */
+        next = g_udev_device_get_parent (parent);
+        g_object_unref (parent);
+        parent = next;
+    }
+
+    if (!parent) {
+        g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "couldn't find parent physical USB device");
+        return NULL;
+    }
+
+    sysfs_path = g_strdup (g_udev_device_get_sysfs_path (parent));
+    g_object_unref (parent);
+    return sysfs_path;
+}
+
+gchar *
+qfu_udev_helper_get_sysfs_path (GFile               *file,
+                                const gchar *const  *subsys,
+                                GError             **error)
+{
+    guint        i;
+    GUdevClient *udev;
+    gchar       *sysfs_path = NULL;
+    gchar       *basename;
+    gboolean     matched = FALSE;
+
+    /* Get the filename */
+    basename = g_file_get_basename (file);
+    if (!basename) {
+        g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "couldn't get filename");
+        return NULL;
+    }
+
+    udev = g_udev_client_new (NULL);
+
+    /* Note: we'll only get devices reported in either one subsystem or the
+     * other, never in both */
+    for (i = 0; !matched && subsys[i]; i++) {
+        GList *devices, *iter;
+
+        devices = g_udev_client_query_by_subsystem (udev, subsys[i]);
+        for (iter = devices; !matched && iter; iter = g_list_next (iter)) {
+            const gchar *name;
+            GUdevDevice *device;
+
+            device = G_UDEV_DEVICE (iter->data);
+            name = g_udev_device_get_name (device);
+            if (g_strcmp0 (name, basename) != 0)
+                continue;
+
+            /* We'll halt the search once this has been processed */
+            matched = TRUE;
+            sysfs_path = qfu_udev_helper_get_udev_device_sysfs_path (device, error);
+        }
+        g_list_free_full (devices, (GDestroyNotify) g_object_unref);
+    }
+
+    if (!matched) {
+        g_assert (!sysfs_path);
+        g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "couldn't find device");
+    }
+
+    g_free (basename);
+    g_object_unref (udev);
+    return sysfs_path;
+}