a56f663f07
At present we put the driver in the /chosen node in U-Boot. This is a bit strange, since U-Boot doesn't normally use that node itself. It is better to put it under the bootstd node. To make this work we need to copy create the node under /chosen when fixing up the device tree. Copy over all the properties so that fwupd knows what to do. Update the sandbox device tree accordingly. Signed-off-by: Simon Glass <sjg@chromium.org>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
// 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 = 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);
|
|
|
|
ret = device_probe(dev);
|
|
if (ret)
|
|
return log_msg_ret("probe", 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);
|