blob: 910f1b479809ec91cbf4e238eda6b03fa54dacf8 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Building an expo from an FDT description
*
* Copyright 2022 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY LOGC_EXPO
#include <common.h>
#include <expo.h>
#include <fdtdec.h>
#include <log.h>
#include <malloc.h>
#include <dm/ofnode.h>
#include <linux/libfdt.h>
/**
* struct build_info - Information to use when building
*
* @str_for_id: String for each ID in use, NULL if empty. The string is NULL
* if there is nothing for this ID. Since ID 0 is never used, the first
* element of this array is always NULL
* @str_count: Number of entries in @str_for_id
*/
struct build_info {
const char **str_for_id;
int str_count;
};
/**
* add_txt_str - Add a string or lookup its ID, then add to expo
*
* @info: Build information
* @node: Node describing scene
* @scn: Scene to add to
* @find_name: Name to look for (e.g. "title"). This will find a property called
* "title" if it exists, else will look up the string for "title-id"
* Return: ID of added string, or -ve on error
*/
int add_txt_str(struct build_info *info, ofnode node, struct scene *scn,
const char *find_name, uint obj_id)
{
const char *text;
uint str_id;
int ret;
text = ofnode_read_string(node, find_name);
if (!text) {
char name[40];
u32 id;
snprintf(name, sizeof(name), "%s-id", find_name);
ret = ofnode_read_u32(node, name, &id);
if (ret)
return log_msg_ret("id", -EINVAL);
if (id >= info->str_count)
return log_msg_ret("id", -E2BIG);
text = info->str_for_id[id];
if (!text)
return log_msg_ret("id", -EINVAL);
}
ret = expo_str(scn->expo, find_name, 0, text);
if (ret < 0)
return log_msg_ret("add", ret);
str_id = ret;
ret = scene_txt_str(scn, find_name, obj_id, str_id, text, NULL);
if (ret < 0)
return log_msg_ret("add", ret);
return ret;
}
/**
* add_txt_str_list - Add a list string or lookup its ID, then add to expo
*
* @info: Build information
* @node: Node describing scene
* @scn: Scene to add to
* @find_name: Name to look for (e.g. "title"). This will find a string-list
* property called "title" if it exists, else will look up the string in the
* "title-id" string list.
* Return: ID of added string, or -ve on error
*/
int add_txt_str_list(struct build_info *info, ofnode node, struct scene *scn,
const char *find_name, int index, uint obj_id)
{
const char *text;
uint str_id;
int ret;
ret = ofnode_read_string_index(node, find_name, index, &text);
if (ret) {
char name[40];
u32 id;
snprintf(name, sizeof(name), "%s-id", find_name);
ret = ofnode_read_u32_index(node, name, index, &id);
if (ret)
return log_msg_ret("id", -ENOENT);
if (id >= info->str_count)
return log_msg_ret("id", -E2BIG);
text = info->str_for_id[id];
if (!text)
return log_msg_ret("id", -EINVAL);
}
ret = expo_str(scn->expo, find_name, 0, text);
if (ret < 0)
return log_msg_ret("add", ret);
str_id = ret;
ret = scene_txt_str(scn, find_name, obj_id, str_id, text, NULL);
if (ret < 0)
return log_msg_ret("add", ret);
return ret;
}
/*
* build_element() - Handle creating a text object from a label
*
* Look up a property called @label or @label-id and create a string for it
*/
int build_element(void *ldtb, int node, const char *label)
{
return 0;
}
/**
* read_strings() - Read in the list of strings
*
* Read the strings into an ID-indexed list, so they can be used for building
* an expo. The strings are in a /strings node and each has its own subnode
* containing the ID and the string itself:
*
* example {
* id = <123>;
* value = "This is a test";
* };
*
* Future work may add support for unicode and multiple languages
*
* @info: Build information
* @root: Root node to read from
* Returns: 0 if OK, -ENOMEM if out of memory, -EINVAL if there is a format
* error
*/
static int read_strings(struct build_info *info, ofnode root)
{
ofnode strings, node;
strings = ofnode_find_subnode(root, "strings");
if (!ofnode_valid(strings))
return log_msg_ret("str", -EINVAL);
ofnode_for_each_subnode(node, strings) {
const char *val;
int ret;
u32 id;
ret = ofnode_read_u32(node, "id", &id);
if (ret)
return log_msg_ret("id", -EINVAL);
val = ofnode_read_string(node, "value");
if (!val)
return log_msg_ret("val", -EINVAL);
if (id >= info->str_count) {
int new_count = info->str_count + 20;
void *new_arr;
new_arr = realloc(info->str_for_id,
new_count * sizeof(char *));
if (!new_arr)
return log_msg_ret("id", -ENOMEM);
memset(new_arr + info->str_count, '\0',
(new_count - info->str_count) * sizeof(char *));
info->str_for_id = new_arr;
info->str_count = new_count;
}
info->str_for_id[id] = val;
}
return 0;
}
/**
* list_strings() - List the available strings with their IDs
*
* @info: Build information
*/
static void list_strings(struct build_info *info)
{
int i;
for (i = 0; i < info->str_count; i++) {
if (info->str_for_id[i])
printf("%3d %s\n", i, info->str_for_id[i]);
}
}
/**
* menu_build() - Build a menu and add it to a scene
*
* See doc/develop/expo.rst for a description of the format
*
* @info: Build information
* @node: Node containing the menu description
* @scn: Scene to add the menu to
* @id: ID for the menu
* @objp: Returns the object pointer
* Returns: 0 if OK, -ENOMEM if out of memory, -EINVAL if there is a format
* error, -ENOENT if there is a references to a non-existent string
*/
static int menu_build(struct build_info *info, ofnode node, struct scene *scn,
uint id, struct scene_obj **objp)
{
struct scene_obj_menu *menu;
uint title_id, menu_id;
const u32 *item_ids;
int ret, size, i;
const char *name;
name = ofnode_get_name(node);
ret = scene_menu(scn, name, id, &menu);
if (ret < 0)
return log_msg_ret("men", ret);
menu_id = ret;
/* Set the title */
ret = add_txt_str(info, node, scn, "title", 0);
if (ret < 0)
return log_msg_ret("tit", ret);
title_id = ret;
ret = scene_menu_set_title(scn, menu_id, title_id);
item_ids = ofnode_read_prop(node, "item-id", &size);
if (!item_ids)
return log_msg_ret("itm", -EINVAL);
if (!size || size % sizeof(u32))
return log_msg_ret("isz", -EINVAL);
size /= sizeof(u32);
for (i = 0; i < size; i++) {
struct scene_menitem *item;
uint label, key, desc;
ret = add_txt_str_list(info, node, scn, "item-label", i, 0);
if (ret < 0 && ret != -ENOENT)
return log_msg_ret("lab", ret);
label = max(0, ret);
ret = add_txt_str_list(info, node, scn, "key-label", i, 0);
if (ret < 0 && ret != -ENOENT)
return log_msg_ret("key", ret);
key = max(0, ret);
ret = add_txt_str_list(info, node, scn, "desc-label", i, 0);
if (ret < 0 && ret != -ENOENT)
return log_msg_ret("lab", ret);
desc = max(0, ret);
ret = scene_menuitem(scn, menu_id, simple_xtoa(i),
fdt32_to_cpu(item_ids[i]), key, label,
desc, 0, 0, &item);
if (ret < 0)
return log_msg_ret("mi", ret);
}
*objp = &menu->obj;
return 0;
}
/**
* obj_build() - Build an expo object and add it to a scene
*
* See doc/develop/expo.rst for a description of the format
*
* @info: Build information
* @node: Node containing the object description
* @scn: Scene to add the object to
* Returns: 0 if OK, -ENOMEM if out of memory, -EINVAL if there is a format
* error, -ENOENT if there is a references to a non-existent string
*/
static int obj_build(struct build_info *info, ofnode node, struct scene *scn)
{
struct scene_obj *obj;
const char *type;
u32 id, val;
int ret;
log_debug("- object %s\n", ofnode_get_name(node));
ret = ofnode_read_u32(node, "id", &id);
if (ret)
return log_msg_ret("id", -EINVAL);
type = ofnode_read_string(node, "type");
if (!type)
return log_msg_ret("typ", -EINVAL);
if (!strcmp("menu", type))
ret = menu_build(info, node, scn, id, &obj);
else
ret = -EINVAL;
if (ret)
return log_msg_ret("bld", ret);
if (!ofnode_read_u32(node, "start-bit", &val))
obj->start_bit = val;
if (!ofnode_read_u32(node, "bit-length", &val))
obj->bit_length = val;
return 0;
}
/**
* scene_build() - Build a scene and all its objects
*
* See doc/develop/expo.rst for a description of the format
*
* @info: Build information
* @node: Node containing the scene description
* @scn: Scene to add the object to
* Returns: 0 if OK, -ENOMEM if out of memory, -EINVAL if there is a format
* error, -ENOENT if there is a references to a non-existent string
*/
static int scene_build(struct build_info *info, ofnode scn_node,
struct expo *exp)
{
const char *name;
struct scene *scn;
uint id, title_id;
ofnode node;
int ret;
name = ofnode_get_name(scn_node);
log_debug("Building scene %s\n", name);
ret = ofnode_read_u32(scn_node, "id", &id);
if (ret)
return log_msg_ret("id", -EINVAL);
ret = scene_new(exp, name, id, &scn);
if (ret < 0)
return log_msg_ret("scn", ret);
ret = add_txt_str(info, scn_node, scn, "title", 0);
if (ret < 0)
return log_msg_ret("tit", ret);
title_id = ret;
scene_title_set(scn, title_id);
ret = add_txt_str(info, scn_node, scn, "prompt", 0);
if (ret < 0)
return log_msg_ret("pr", ret);
ofnode_for_each_subnode(node, scn_node) {
ret = obj_build(info, node, scn);
if (ret < 0)
return log_msg_ret("mit", ret);
}
return 0;
}
int expo_build(ofnode root, struct expo **expp)
{
struct build_info info;
ofnode scenes, node;
struct expo *exp;
u32 dyn_start;
int ret;
memset(&info, '\0', sizeof(info));
ret = read_strings(&info, root);
if (ret)
return log_msg_ret("str", ret);
if (_DEBUG)
list_strings(&info);
ret = expo_new("name", NULL, &exp);
if (ret)
return log_msg_ret("exp", ret);
if (!ofnode_read_u32(root, "dynamic-start", &dyn_start))
expo_set_dynamic_start(exp, dyn_start);
scenes = ofnode_find_subnode(root, "scenes");
if (!ofnode_valid(scenes))
return log_msg_ret("sno", -EINVAL);
ofnode_for_each_subnode(node, scenes) {
ret = scene_build(&info, node, exp);
if (ret < 0)
return log_msg_ret("scn", ret);
}
*expp = exp;
return 0;
}