From a0874dc4ac7153f49f72c3fb818422d940ecbfea Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 1 Jun 2023 10:23:02 -0600
Subject: expo: Add a configuration editor

Add a new 'cedit' command which allows editing configuration using an
expo. The configuration items appear as menus on the display.

This is extremely basic, only supporting menus and not providing any way
to load or save the configuration.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 cmd/Kconfig  |  9 ++++++
 cmd/Makefile |  1 +
 cmd/cedit.c  | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 103 insertions(+)
 create mode 100644 cmd/cedit.c

(limited to 'cmd')

diff --git a/cmd/Kconfig b/cmd/Kconfig
index c1941849f98..f6b10e01f84 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -428,6 +428,15 @@ config CMD_ABOOTIMG
 
 	  See doc/android/boot-image.rst for details.
 
+config CMD_CEDIT
+	bool "cedit - Configuration editor"
+	depends on CEDIT
+	default y
+	help
+	  Provides a command to allow editing of board configuration and
+	  providing a UI for the user to adjust settings. Subcommands allow
+	  loading and saving of configuration as well as showing an editor.
+
 config CMD_ELF
 	bool "bootelf, bootvx"
 	default y
diff --git a/cmd/Makefile b/cmd/Makefile
index 6c37521b4e2..9f8c0b058be 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_CMD_BUTTON) += button.o
 obj-$(CONFIG_CMD_CAT) += cat.o
 obj-$(CONFIG_CMD_CACHE) += cache.o
 obj-$(CONFIG_CMD_CBFS) += cbfs.o
+obj-$(CONFIG_CMD_CEDIT) += cedit.o
 obj-$(CONFIG_CMD_CLK) += clk.o
 obj-$(CONFIG_CMD_CLS) += cls.o
 obj-$(CONFIG_CMD_CONFIG) += config.o
diff --git a/cmd/cedit.c b/cmd/cedit.c
new file mode 100644
index 00000000000..0cae304c4ad
--- /dev/null
+++ b/cmd/cedit.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * 'cedit' command
+ *
+ * Copyright 2023 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <expo.h>
+#include <fs.h>
+#include <dm/ofnode.h>
+#include <linux/sizes.h>
+
+struct expo *cur_exp;
+
+static int do_cedit_load(struct cmd_tbl *cmdtp, int flag, int argc,
+			 char *const argv[])
+{
+	const char *fname;
+	struct expo *exp;
+	oftree tree;
+	ulong size;
+	void *buf;
+	int ret;
+
+	if (argc < 4)
+		return CMD_RET_USAGE;
+	fname = argv[3];
+
+	ret = fs_load_alloc(argv[1], argv[2], argv[3], SZ_1M, 0, &buf, &size);
+	if (ret) {
+		printf("File not found\n");
+		return CMD_RET_FAILURE;
+	}
+
+	tree = oftree_from_fdt(buf);
+	if (!oftree_valid(tree)) {
+		printf("Cannot create oftree\n");
+		return CMD_RET_FAILURE;
+	}
+
+	ret = expo_build(oftree_root(tree), &exp);
+	oftree_dispose(tree);
+	if (ret) {
+		printf("Failed to build expo: %dE\n", ret);
+		return CMD_RET_FAILURE;
+	}
+
+	cur_exp = exp;
+
+	return 0;
+}
+
+static int do_cedit_run(struct cmd_tbl *cmdtp, int flag, int argc,
+			char *const argv[])
+{
+	ofnode node;
+	int ret;
+
+	if (!cur_exp) {
+		printf("No expo loaded\n");
+		return CMD_RET_FAILURE;
+	}
+
+	node = ofnode_path("/cedit-theme");
+	if (ofnode_valid(node)) {
+		ret = expo_apply_theme(cur_exp, node);
+		if (ret)
+			return CMD_RET_FAILURE;
+	} else {
+		log_warning("No theme found\n");
+	}
+	ret = cedit_run(cur_exp);
+	if (ret) {
+		log_err("Failed (err=%dE)\n", ret);
+		return CMD_RET_FAILURE;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_SYS_LONGHELP
+static char cedit_help_text[] =
+	"load <interface> <dev[:part]> <filename>   - load config editor\n"
+	"cedit run                                        - run config editor";
+#endif /* CONFIG_SYS_LONGHELP */
+
+U_BOOT_CMD_WITH_SUBCMDS(cedit, "Configuration editor", cedit_help_text,
+	U_BOOT_SUBCMD_MKENT(load, 5, 1, do_cedit_load),
+	U_BOOT_SUBCMD_MKENT(run, 1, 1, do_cedit_run),
+);
-- 
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