mirror of
https://git.proxmox.com/git/fwupd
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cf4f34572b
This is needed because multiple plugins will soon be consuming the system FDT, and we don't want to either parse this multiple times, or duplicate the loading logic.
138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
/*
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* Copyright (C) 2022 Richard Hughes <richard@hughsie.com>
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* Copyright (C) 2022 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include "config.h"
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#include "fu-vbe-plugin.h"
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#include "fu-vbe-simple-device.h"
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struct _FuVbePlugin {
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FuPlugin parent_instance;
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};
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G_DEFINE_TYPE(FuVbePlugin, fu_vbe_plugin, FU_TYPE_PLUGIN)
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static gboolean
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fu_vbe_plugin_coldplug_img(FuPlugin *plugin,
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FuFdtImage *fdt_root,
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FuFdtImage *fdt_node,
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GError **error)
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{
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GType device_gtype = G_TYPE_INVALID;
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g_autofree gchar *compatible = NULL;
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g_auto(GStrv) split = NULL;
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g_autoptr(FuDevice) dev = NULL;
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/* we expect 'fwupd,vbe-<driver>' */
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if (!fu_fdt_image_get_attr_str(fdt_node,
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FU_FIT_FIRMWARE_ATTR_COMPATIBLE,
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&compatible,
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error)) {
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g_prefix_error(error, "missing update mechanism: ");
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return FALSE;
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}
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split = g_strsplit(compatible, ",", 2);
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if (g_strv_length(split) != 2) {
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g_set_error(error,
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FWUPD_ERROR,
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FWUPD_ERROR_INVALID_FILE,
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"update mechanism is invalid: %s",
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compatible);
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return FALSE;
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}
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if (g_strcmp0(split[0], "fwupd") != 0) {
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g_set_error(error,
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FWUPD_ERROR,
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FWUPD_ERROR_INVALID_FILE,
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"update mechanism should have manufacturer of fwupd: %s",
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split[0]);
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return FALSE;
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}
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/* skip past 'vbe-' */
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if (!g_str_has_prefix(split[1], "vbe-")) {
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g_set_error(error,
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FWUPD_ERROR,
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FWUPD_ERROR_INVALID_FILE,
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"update mechanism is missing vbe prefix: %s",
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split[1]);
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return FALSE;
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}
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if (g_strcmp0(split[1], "vbe-simple") == 0) {
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device_gtype = FU_TYPE_VBE_SIMPLE_DEVICE;
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} else {
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g_set_error(error,
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FWUPD_ERROR,
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FWUPD_ERROR_INVALID_FILE,
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"no driver for VBE method '%s'",
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split[1]);
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return FALSE;
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}
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/* success */
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dev = g_object_new(device_gtype,
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"context",
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fu_plugin_get_context(plugin),
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"fdt-root",
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fdt_root,
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"fdt-node",
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fdt_node,
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NULL);
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fu_plugin_device_add(plugin, dev);
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return TRUE;
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}
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static gboolean
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fu_vbe_plugin_coldplug(FuPlugin *plugin, FuProgress *progress, GError **error)
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{
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g_autoptr(FuFirmware) fdt = NULL;
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g_autoptr(FuFdtImage) fdt_root = NULL;
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g_autoptr(GPtrArray) fdt_imgs = NULL;
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/* get compatible from root node */
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fdt = fu_context_get_fdt(fu_plugin_get_context(plugin), error);
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if (fdt == NULL)
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return FALSE;
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fdt_root = fu_fdt_firmware_get_image_by_path(FU_FDT_FIRMWARE(fdt), "/chosen/fwupd", error);
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if (fdt_root == NULL)
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return FALSE;
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fdt_imgs = fu_firmware_get_images(FU_FIRMWARE(fdt_root));
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for (guint i = 0; i < fdt_imgs->len; i++) {
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FuFdtImage *fdt_node = g_ptr_array_index(fdt_imgs, i);
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g_autoptr(GError) error_local = NULL;
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if (!fu_vbe_plugin_coldplug_img(plugin, fdt_root, fdt_node, &error_local)) {
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g_warning("%s", error_local->message);
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continue;
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}
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}
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/* nothing found? */
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if (fu_plugin_get_devices(plugin)->len == 0) {
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g_set_error(error,
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FWUPD_ERROR,
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FWUPD_ERROR_NOT_SUPPORTED,
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"no valid VBE update mechanism found");
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return FALSE;
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}
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/* success */
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return TRUE;
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}
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static void
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fu_vbe_plugin_init(FuVbePlugin *self)
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{
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}
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static void
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fu_vbe_plugin_class_init(FuVbePluginClass *klass)
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{
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FuPluginClass *plugin_class = FU_PLUGIN_CLASS(klass);
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plugin_class->coldplug = fu_vbe_plugin_coldplug;
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}
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