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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Verified Boot for Embedded (VBE) loading firmware phases
- *
- * Copyright 2022 Google LLC
- * Written by Simon Glass <sjg@chromium.org>
- */
- #define LOG_CATEGORY LOGC_BOOT
- #include <common.h>
- #include <dm.h>
- #include <bootflow.h>
- #include <vbe.h>
- #include <version_string.h>
- #include <dm/device-internal.h>
- #include "vbe_simple.h"
- int vbe_simple_fixup_node(ofnode node, struct simple_state *state)
- {
- const char *version, *str;
- int ret;
- version = strdup(state->fw_version);
- if (!version)
- return log_msg_ret("dup", -ENOMEM);
- ret = ofnode_write_string(node, "cur-version", version);
- if (ret)
- return log_msg_ret("ver", ret);
- ret = ofnode_write_u32(node, "cur-vernum", state->fw_vernum);
- if (ret)
- return log_msg_ret("num", ret);
- /* Drop the 'U-Boot ' at the start */
- str = version_string;
- if (!strncmp("U-Boot ", str, 7))
- str += 7;
- ret = ofnode_write_string(node, "bootloader-version", str);
- if (ret)
- return log_msg_ret("bl", ret);
- return 0;
- }
- /**
- * bootmeth_vbe_simple_ft_fixup() - Write out all VBE simple data to the DT
- *
- * @ctx: Context for event
- * @event: Event to process
- * @return 0 if OK, -ve on error
- */
- static int bootmeth_vbe_simple_ft_fixup(void *ctx, struct event *event)
- {
- oftree tree = event->data.ft_fixup.tree;
- struct udevice *dev;
- /*
- * Ideally we would have driver model support for fixups, but that does
- * not exist yet. It is a step too far to try to do this before VBE is
- * in place.
- */
- for (vbe_find_first_device(&dev); dev; vbe_find_next_device(&dev)) {
- struct simple_state state;
- ofnode node, subnode, chosen;
- int ret;
- if (strcmp("vbe_simple", dev->driver->name))
- continue;
- /* Check if there is a node to fix up, adding if not */
- chosen = oftree_path(tree, "/chosen");
- if (!ofnode_valid(chosen))
- continue;
- ret = device_probe(dev);
- if (ret) {
- /*
- * This should become an error when VBE is updated to
- * only bind this device when a node exists
- */
- log_debug("VBE device '%s' failed to probe (err=%d)",
- dev->name, ret);
- return 0;
- }
- ret = ofnode_add_subnode(chosen, "fwupd", &node);
- if (ret && ret != -EEXIST)
- return log_msg_ret("fwu", ret);
- ret = ofnode_add_subnode(node, dev->name, &subnode);
- if (ret && ret != -EEXIST)
- return log_msg_ret("dev", ret);
- /* Copy over the vbe properties for fwupd */
- log_debug("Fixing up: %s\n", dev->name);
- ret = ofnode_copy_props(dev_ofnode(dev), subnode);
- if (ret)
- return log_msg_ret("cp", ret);
- ret = vbe_simple_read_state(dev, &state);
- if (ret)
- return log_msg_ret("read", ret);
- ret = vbe_simple_fixup_node(subnode, &state);
- if (ret)
- return log_msg_ret("fix", ret);
- }
- return 0;
- }
- EVENT_SPY(EVT_FT_FIXUP, bootmeth_vbe_simple_ft_fixup);
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