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/*
* Copyright 2022 Richard Hughes <richard@hughsie.com>
* Copyright 2022 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "fu-vbe-plugin.h"
#include "fu-vbe-simple-device.h"
struct _FuVbePlugin {
FuPlugin parent_instance;
};
G_DEFINE_TYPE(FuVbePlugin, fu_vbe_plugin, FU_TYPE_PLUGIN)
static gboolean
fu_vbe_plugin_coldplug_img(FuPlugin *plugin,
FuFdtImage *fdt_root,
FuFdtImage *fdt_node,
GError **error)
{
GType device_gtype = G_TYPE_INVALID;
g_autofree gchar *compatible = NULL;
g_auto(GStrv) split = NULL;
g_autoptr(FuDevice) dev = NULL;
/* we expect 'fwupd,vbe-<driver>' */
if (!fu_fdt_image_get_attr_str(fdt_node,
FU_FIT_FIRMWARE_ATTR_COMPATIBLE,
&compatible,
error)) {
g_prefix_error_literal(error, "missing update mechanism: ");
return FALSE;
}
split = g_strsplit(compatible, ",", 2);
if (g_strv_length(split) != 2) {
g_set_error(error,
FWUPD_ERROR,
FWUPD_ERROR_INVALID_FILE,
"update mechanism is invalid: %s",
compatible);
return FALSE;
}
if (g_strcmp0(split[0], "fwupd") != 0) {
g_set_error(error,
FWUPD_ERROR,
FWUPD_ERROR_INVALID_FILE,
"update mechanism should have manufacturer of fwupd: %s",
split[0]);
return FALSE;
}
/* skip past 'vbe-' */
if (!g_str_has_prefix(split[1], "vbe-")) {
g_set_error(error,
FWUPD_ERROR,
FWUPD_ERROR_INVALID_FILE,
"update mechanism is missing vbe prefix: %s",
split[1]);
return FALSE;
}
if (g_strcmp0(split[1], "vbe-simple") == 0) {
device_gtype = FU_TYPE_VBE_SIMPLE_DEVICE;
} else {
g_set_error(error,
FWUPD_ERROR,
FWUPD_ERROR_INVALID_FILE,
"no driver for VBE method '%s'",
split[1]);
return FALSE;
}
/* success */
dev = g_object_new(device_gtype,
"context",
fu_plugin_get_context(plugin),
"fdt-root",
fdt_root,
"fdt-node",
fdt_node,
NULL);
fu_plugin_device_add(plugin, dev);
return TRUE;
}
static gboolean
fu_vbe_plugin_coldplug(FuPlugin *plugin, FuProgress *progress, GError **error)
{
g_autoptr(FuFirmware) fdt = NULL;
g_autoptr(FuFdtImage) fdt_root = NULL;
g_autoptr(GPtrArray) fdt_imgs = NULL;
/* get compatible from root node */
fdt = fu_context_get_fdt(fu_plugin_get_context(plugin), error);
if (fdt == NULL)
return FALSE;
fdt_root = fu_fdt_firmware_get_image_by_path(FU_FDT_FIRMWARE(fdt), "/chosen/fwupd", error);
if (fdt_root == NULL)
return FALSE;
fdt_imgs = fu_firmware_get_images(FU_FIRMWARE(fdt_root));
for (guint i = 0; i < fdt_imgs->len; i++) {
FuFdtImage *fdt_node = g_ptr_array_index(fdt_imgs, i);
g_autoptr(GError) error_local = NULL;
if (!fu_vbe_plugin_coldplug_img(plugin, fdt_root, fdt_node, &error_local)) {
g_warning("%s", error_local->message);
continue;
}
}
/* nothing found? */
if (fu_plugin_get_devices(plugin)->len == 0) {
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_NOT_SUPPORTED,
"no valid VBE update mechanism found");
return FALSE;
}
/* success */
return TRUE;
}
static void
fu_vbe_plugin_init(FuVbePlugin *self)
{
}
static void
fu_vbe_plugin_constructed(GObject *obj)
{
FuPlugin *plugin = FU_PLUGIN(obj);
fu_plugin_add_device_gtype(plugin, FU_TYPE_VBE_SIMPLE_DEVICE); /* coverage */
}
static void
fu_vbe_plugin_class_init(FuVbePluginClass *klass)
{
FuPluginClass *plugin_class = FU_PLUGIN_CLASS(klass);
plugin_class->constructed = fu_vbe_plugin_constructed;
plugin_class->coldplug = fu_vbe_plugin_coldplug;
}
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