| Simon Glass | 39db199 | 2022-10-20 18:23:11 -0600 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Verified Boot for Embedded (VBE) loading firmware phases |
| 4 | * |
| 5 | * Copyright 2022 Google LLC |
| 6 | * Written by Simon Glass <sjg@chromium.org> |
| 7 | */ |
| 8 | |
| 9 | #define LOG_CATEGORY LOGC_BOOT |
| 10 | |
| 11 | #include <common.h> |
| 12 | #include <dm.h> |
| 13 | #include <bootflow.h> |
| 14 | #include <vbe.h> |
| 15 | #include <version_string.h> |
| 16 | #include <dm/device-internal.h> |
| 17 | #include "vbe_simple.h" |
| 18 | |
| 19 | int vbe_simple_fixup_node(ofnode node, struct simple_state *state) |
| 20 | { |
| 21 | char *version; |
| 22 | int ret; |
| 23 | |
| 24 | version = strdup(state->fw_version); |
| 25 | if (!version) |
| 26 | return log_msg_ret("dup", -ENOMEM); |
| 27 | |
| 28 | ret = ofnode_write_string(node, "cur-version", version); |
| 29 | if (ret) |
| 30 | return log_msg_ret("ver", ret); |
| 31 | ret = ofnode_write_u32(node, "cur-vernum", state->fw_vernum); |
| 32 | if (ret) |
| 33 | return log_msg_ret("num", ret); |
| 34 | ret = ofnode_write_string(node, "bootloader-version", version_string); |
| 35 | if (ret) |
| 36 | return log_msg_ret("bl", ret); |
| 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * bootmeth_vbe_simple_ft_fixup() - Write out all VBE simple data to the DT |
| 43 | * |
| 44 | * @ctx: Context for event |
| 45 | * @event: Event to process |
| 46 | * @return 0 if OK, -ve on error |
| 47 | */ |
| 48 | static int bootmeth_vbe_simple_ft_fixup(void *ctx, struct event *event) |
| 49 | { |
| 50 | oftree tree = event->data.ft_fixup.tree; |
| 51 | struct udevice *dev; |
| 52 | |
| 53 | /* |
| 54 | * Ideally we would have driver model support for fixups, but that does |
| 55 | * not exist yet. It is a step too far to try to do this before VBE is |
| 56 | * in place. |
| 57 | */ |
| 58 | for (vbe_find_first_device(&dev); dev; vbe_find_next_device(&dev)) { |
| 59 | struct simple_state state; |
| 60 | ofnode node, subnode; |
| 61 | int ret; |
| 62 | |
| 63 | if (strcmp("vbe_simple", dev->driver->name)) |
| 64 | continue; |
| 65 | |
| 66 | /* Check if there is a node to fix up */ |
| 67 | node = oftree_path(tree, "/chosen/fwupd"); |
| 68 | if (!ofnode_valid(node)) |
| 69 | continue; |
| 70 | subnode = ofnode_find_subnode(node, dev->name); |
| 71 | if (!ofnode_valid(subnode)) |
| 72 | continue; |
| 73 | |
| 74 | log_debug("Fixing up: %s\n", dev->name); |
| 75 | ret = device_probe(dev); |
| 76 | if (ret) |
| 77 | return log_msg_ret("probe", ret); |
| 78 | ret = simple_read_state(dev, &state); |
| 79 | if (ret) |
| 80 | return log_msg_ret("read", ret); |
| 81 | |
| 82 | ret = vbe_simple_fixup_node(subnode, &state); |
| 83 | if (ret) |
| 84 | return log_msg_ret("fix", ret); |
| 85 | } |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | EVENT_SPY(EVT_FT_FIXUP, bootmeth_vbe_simple_ft_fixup); |