diff options
Diffstat (limited to 'boot/vbe_simple_os.c')
-rw-r--r-- | boot/vbe_simple_os.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/boot/vbe_simple_os.c b/boot/vbe_simple_os.c new file mode 100644 index 00000000000..b2041a95a30 --- /dev/null +++ b/boot/vbe_simple_os.c @@ -0,0 +1,104 @@ +// 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); |