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// SPDX-License-Identifier: GPL-2.0+
/*
* Bootmethod for booting via a U-Boot script
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_BOOTSTD
#include <common.h>
#include <blk.h>
#include <bootflow.h>
#include <bootmeth.h>
#include <bootstd.h>
#include <dm.h>
#include <env.h>
#include <fs.h>
#include <image.h>
#include <malloc.h>
#include <mapmem.h>
#define SCRIPT_FNAME1 "boot.scr.uimg"
#define SCRIPT_FNAME2 "boot.scr"
static int script_check(struct udevice *dev, struct bootflow_iter *iter)
{
int ret;
/* This only works on block devices */
ret = bootflow_iter_uses_blk_dev(iter);
if (ret)
return log_msg_ret("blk", ret);
return 0;
}
static int script_read_bootflow(struct udevice *dev, struct bootflow *bflow)
{
struct blk_desc *desc = NULL;
const char *const *prefixes;
struct udevice *bootstd;
const char *prefix;
int ret, i;
ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd);
if (ret)
return log_msg_ret("std", ret);
/* We require a partition table */
if (!bflow->part)
return -ENOENT;
if (bflow->blk)
desc = dev_get_uclass_plat(bflow->blk);
prefixes = bootstd_get_prefixes(bootstd);
i = 0;
do {
prefix = prefixes ? prefixes[i] : NULL;
ret = bootmeth_try_file(bflow, desc, prefix, SCRIPT_FNAME1);
if (ret)
ret = bootmeth_try_file(bflow, desc, prefix,
SCRIPT_FNAME2);
} while (ret && prefixes && prefixes[++i]);
if (ret)
return log_msg_ret("try", ret);
bflow->subdir = strdup(prefix ? prefix : "");
if (!bflow->subdir)
return log_msg_ret("prefix", -ENOMEM);
ret = bootmeth_alloc_file(bflow, 0x10000, 1);
if (ret)
return log_msg_ret("read", ret);
return 0;
}
static int script_boot(struct udevice *dev, struct bootflow *bflow)
{
struct blk_desc *desc = dev_get_uclass_plat(bflow->blk);
ulong addr;
int ret;
ret = env_set("devtype", blk_get_devtype(bflow->blk));
if (!ret)
ret = env_set_hex("devnum", desc->devnum);
if (!ret)
ret = env_set("prefix", bflow->subdir);
if (!ret && IS_ENABLED(CONFIG_ARCH_SUNXI) &&
!strcmp("mmc", blk_get_devtype(bflow->blk)))
ret = env_set_hex("mmc_bootdev", desc->devnum);
if (ret)
return log_msg_ret("env", ret);
log_debug("devtype: %s\n", env_get("devtype"));
log_debug("devnum: %s\n", env_get("devnum"));
log_debug("prefix: %s\n", env_get("prefix"));
log_debug("mmc_bootdev: %s\n", env_get("mmc_bootdev"));
addr = map_to_sysmem(bflow->buf);
ret = image_source_script(addr, NULL);
if (ret)
return log_msg_ret("boot", ret);
return 0;
}
static int script_bootmeth_bind(struct udevice *dev)
{
struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ?
"Script boot from a block device" : "script";
return 0;
}
static struct bootmeth_ops script_bootmeth_ops = {
.check = script_check,
.read_bootflow = script_read_bootflow,
.read_file = bootmeth_common_read_file,
.boot = script_boot,
};
static const struct udevice_id script_bootmeth_ids[] = {
{ .compatible = "u-boot,script" },
{ }
};
U_BOOT_DRIVER(bootmeth_script) = {
.name = "bootmeth_script",
.id = UCLASS_BOOTMETH,
.of_match = script_bootmeth_ids,
.ops = &script_bootmeth_ops,
.bind = script_bootmeth_bind,
};
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