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// SPDX-License-Identifier: GPL-2.0+
/*
* Uclass implementation for standard boot
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <bootflow.h>
#include <bootstd.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/read.h>
#include <dm/uclass-internal.h>
DECLARE_GLOBAL_DATA_PTR;
/* These are used if filename-prefixes is not present */
const char *const default_prefixes[] = {"/", "/boot/", NULL};
static int bootstd_of_to_plat(struct udevice *dev)
{
struct bootstd_priv *priv = dev_get_priv(dev);
int ret;
if (IS_ENABLED(CONFIG_BOOTSTD_FULL)) {
/* Don't check errors since livetree and flattree are different */
ret = dev_read_string_list(dev, "filename-prefixes",
&priv->prefixes);
dev_read_string_list(dev, "bootdev-order",
&priv->bootdev_order);
}
return 0;
}
static void bootstd_clear_glob_(struct bootstd_priv *priv)
{
while (!list_empty(&priv->glob_head)) {
struct bootflow *bflow;
bflow = list_first_entry(&priv->glob_head, struct bootflow,
glob_node);
bootflow_remove(bflow);
}
}
void bootstd_clear_glob(void)
{
struct bootstd_priv *std;
if (bootstd_get_priv(&std))
return;
bootstd_clear_glob_(std);
}
static int bootstd_remove(struct udevice *dev)
{
struct bootstd_priv *priv = dev_get_priv(dev);
free(priv->prefixes);
free(priv->bootdev_order);
bootstd_clear_glob_(priv);
return 0;
}
const char *const *const bootstd_get_bootdev_order(struct udevice *dev)
{
struct bootstd_priv *std = dev_get_priv(dev);
return std->bootdev_order;
}
const char *const *const bootstd_get_prefixes(struct udevice *dev)
{
struct bootstd_priv *std = dev_get_priv(dev);
return std->prefixes ? std->prefixes : default_prefixes;
}
int bootstd_get_priv(struct bootstd_priv **stdp)
{
struct udevice *dev;
int ret;
ret = uclass_first_device_err(UCLASS_BOOTSTD, &dev);
if (ret)
return ret;
*stdp = dev_get_priv(dev);
return 0;
}
static int bootstd_probe(struct udevice *dev)
{
struct bootstd_priv *std = dev_get_priv(dev);
INIT_LIST_HEAD(&std->glob_head);
return 0;
}
/* For now, bind the boormethod device if none are found in the devicetree */
int dm_scan_other(bool pre_reloc_only)
{
struct driver *drv = ll_entry_start(struct driver, driver);
const int n_ents = ll_entry_count(struct driver, driver);
struct udevice *dev, *bootstd;
int i, ret;
/* These are not needed before relocation */
if (!(gd->flags & GD_FLG_RELOC))
return 0;
/* Create a bootstd device if needed */
uclass_find_first_device(UCLASS_BOOTSTD, &bootstd);
if (!bootstd) {
ret = device_bind_driver(gd->dm_root, "bootstd_drv", "bootstd",
&bootstd);
if (ret)
return log_msg_ret("bootstd", ret);
}
/* If there are no bootmeth devices, create them */
uclass_find_first_device(UCLASS_BOOTMETH, &dev);
if (dev)
return 0;
for (i = 0; i < n_ents; i++, drv++) {
if (drv->id == UCLASS_BOOTMETH) {
const char *name = drv->name;
if (!strncmp("bootmeth_", name, 9))
name += 9;
ret = device_bind(bootstd, drv, name, 0, ofnode_null(),
&dev);
if (ret)
return log_msg_ret("meth", ret);
}
}
return 0;
}
static const struct udevice_id bootstd_ids[] = {
{ .compatible = "u-boot,boot-std" },
{ }
};
U_BOOT_DRIVER(bootstd_drv) = {
.id = UCLASS_BOOTSTD,
.name = "bootstd_drv",
.of_to_plat = bootstd_of_to_plat,
.probe = bootstd_probe,
.remove = bootstd_remove,
.of_match = bootstd_ids,
.priv_auto = sizeof(struct bootstd_priv),
};
UCLASS_DRIVER(bootstd) = {
.id = UCLASS_BOOTSTD,
.name = "bootstd",
#if CONFIG_IS_ENABLED(OF_REAL)
.post_bind = dm_scan_fdt_dev,
#endif
};
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