bootstd: Support creating a boot menu

Create an expo to handle the boot menu. For now this is quite simple, with
just a header, some menu items and a pointer to show the current one.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 241 insertions, 0 deletions

diff --git a/boot/bootflow_menu.c b/boot/bootflow_menu.c
new file mode 100644
index 0000000000..1105783afe
--- /dev/null
+++ b/boot/bootflow_menu.c
@@ -0,0 +1,241 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Provide a menu of available bootflows and related options
+ *
+ * Copyright 2022 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#define LOG_CATEGORY UCLASS_BOOTSTD
+
+#include <common.h>
+#include <bootflow.h>
+#include <bootstd.h>
+#include <cli.h>
+#include <dm.h>
+#include <expo.h>
+#include <malloc.h>
+#include <menu.h>
+#include <video_console.h>
+#include <watchdog.h>
+#include <linux/delay.h>
+#include "bootflow_internal.h"
+
+/**
+ * struct menu_priv - information about the menu
+ *
+ * @num_bootflows: Number of bootflows in the menu
+ */
+struct menu_priv {
+	int num_bootflows;
+};
+
+int bootflow_menu_new(struct expo **expp)
+{
+	struct udevice *last_bootdev;
+	struct scene_obj_menu *menu;
+	struct menu_priv *priv;
+	struct bootflow *bflow;
+	struct scene *scn;
+	struct expo *exp;
+	void *logo;
+	int ret, i;
+
+	priv = calloc(1, sizeof(*priv));
+	if (!priv)
+		return log_msg_ret("prv", -ENOMEM);
+
+	ret = expo_new("bootflows", priv, &exp);
+	if (ret)
+		return log_msg_ret("exp", ret);
+
+	ret = scene_new(exp, "main", MAIN, &scn);
+	if (ret < 0)
+		return log_msg_ret("scn", ret);
+
+	ret |= scene_txt_str(scn, "prompt", OBJ_PROMPT, STR_PROMPT,
+			     "UP and DOWN to choose, ENTER to select", NULL);
+
+	ret = scene_menu(scn, "main", OBJ_MENU, &menu);
+	ret |= scene_obj_set_pos(scn, OBJ_MENU, MARGIN_LEFT, 100);
+	ret |= scene_txt_str(scn, "title", OBJ_MENU_TITLE, STR_MENU_TITLE,
+			     "U-Boot - Boot Menu", NULL);
+	ret |= scene_menu_set_title(scn, OBJ_MENU, OBJ_PROMPT);
+
+	logo = video_get_u_boot_logo();
+	if (logo) {
+		ret |= scene_img(scn, "ulogo", OBJ_U_BOOT_LOGO, logo, NULL);
+		ret |= scene_obj_set_pos(scn, OBJ_U_BOOT_LOGO, -4, 4);
+	}
+
+	ret |= scene_txt_str(scn, "cur_item", OBJ_POINTER, STR_POINTER, ">",
+			     NULL);
+	ret |= scene_menu_set_pointer(scn, OBJ_MENU, OBJ_POINTER);
+	if (ret < 0)
+		return log_msg_ret("new", -EINVAL);
+
+	last_bootdev = NULL;
+	for (ret = bootflow_first_glob(&bflow), i = 0; !ret && i < 36;
+	     ret = bootflow_next_glob(&bflow), i++) {
+		char str[2], *label, *key;
+		uint preview_id;
+		bool add_gap;
+
+		if (bflow->state != BOOTFLOWST_READY)
+			continue;
+
+		*str = i < 10 ? '0' + i : 'A' + i - 10;
+		str[1] = '\0';
+		key = strdup(str);
+		if (!key)
+			return log_msg_ret("key", -ENOMEM);
+		label = strdup(dev_get_parent(bflow->dev)->name);
+		if (!label) {
+			free(key);
+			return log_msg_ret("nam", -ENOMEM);
+		}
+
+		add_gap = last_bootdev != bflow->dev;
+		last_bootdev = bflow->dev;
+
+		ret = expo_str(exp, "prompt", STR_POINTER, ">");
+		ret |= scene_txt_str(scn, "label", ITEM_LABEL + i,
+				      STR_LABEL + i, label, NULL);
+		ret |= scene_txt_str(scn, "desc", ITEM_DESC + i, STR_DESC + i,
+				    bflow->os_name ? bflow->os_name :
+				    bflow->name, NULL);
+		ret |= scene_txt_str(scn, "key", ITEM_KEY + i, STR_KEY + i, key,
+				      NULL);
+		preview_id = 0;
+		if (bflow->logo) {
+			preview_id = ITEM_PREVIEW + i;
+			ret |= scene_img(scn, "preview", preview_id,
+					     bflow->logo, NULL);
+		}
+		ret |= scene_menuitem(scn, OBJ_MENU, "item", ITEM + i,
+					  ITEM_KEY + i, ITEM_LABEL + i,
+					  ITEM_DESC + i, preview_id,
+					  add_gap ? SCENEMIF_GAP_BEFORE : 0,
+					  NULL);
+
+		if (ret < 0)
+			return log_msg_ret("itm", -EINVAL);
+		ret = 0;
+		priv->num_bootflows++;
+	}
+
+	*expp = exp;
+
+	return 0;
+}
+
+int bootflow_menu_run(struct bootstd_priv *std, bool text_mode,
+		      struct bootflow **bflowp)
+{
+	struct cli_ch_state s_cch, *cch = &s_cch;
+	struct bootflow *sel_bflow;
+	struct udevice *dev;
+	struct expo *exp;
+	uint sel_id;
+	bool done;
+	int ret;
+
+	cli_ch_init(cch);
+
+	sel_bflow = NULL;
+	*bflowp = NULL;
+
+	ret = bootflow_menu_new(&exp);
+	if (ret)
+		return log_msg_ret("exp", ret);
+
+	/* For now we only support a video console */
+	ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
+	if (ret)
+		return log_msg_ret("vid", ret);
+	ret = expo_set_display(exp, dev);
+	if (ret)
+		return log_msg_ret("dis", ret);
+
+	ret = expo_set_scene_id(exp, MAIN);
+	if (ret)
+		return log_msg_ret("scn", ret);
+
+	if (text_mode)
+		exp_set_text_mode(exp, text_mode);
+
+	done = false;
+	do {
+		struct expo_action act;
+		int ichar, key;
+
+		ret = expo_render(exp);
+		if (ret)
+			break;
+
+		ichar = cli_ch_process(cch, 0);
+		if (!ichar) {
+			while (!ichar && !tstc()) {
+				schedule();
+				mdelay(2);
+				ichar = cli_ch_process(cch, -ETIMEDOUT);
+			}
+			if (!ichar) {
+				ichar = getchar();
+				ichar = cli_ch_process(cch, ichar);
+			}
+		}
+
+		key = 0;
+		if (ichar) {
+			key = bootmenu_conv_key(ichar);
+			if (key == BKEY_NONE)
+				key = ichar;
+		}
+		if (!key)
+			continue;
+
+		ret = expo_send_key(exp, key);
+		if (ret)
+			break;
+
+		ret = expo_action_get(exp, &act);
+		if (!ret) {
+			switch (act.type) {
+			case EXPOACT_SELECT:
+				sel_id = act.select.id;
+				done = true;
+				break;
+			case EXPOACT_QUIT:
+				done = true;
+				break;
+			default:
+				break;
+			}
+		}
+	} while (!done);
+
+	if (ret)
+		return log_msg_ret("end", ret);
+
+	if (sel_id) {
+		struct bootflow *bflow;
+		int i;
+
+		for (ret = bootflow_first_glob(&bflow), i = 0; !ret && i < 36;
+		     ret = bootflow_next_glob(&bflow), i++) {
+			if (i == sel_id - ITEM) {
+				sel_bflow = bflow;
+				break;
+			}
+		}
+	}
+
+	expo_destroy(exp);
+
+	if (!sel_bflow)
+		return -EAGAIN;
+	*bflowp = sel_bflow;
+
+	return 0;
+}