1 // SPDX-License-Identifier: GPL-2.0+
3 * Bootmethod for booting via a U-Boot script
5 * Copyright 2021 Google LLC
6 * Written by Simon Glass <sjg@chromium.org>
9 #define LOG_CATEGORY UCLASS_BOOTSTD
23 #define SCRIPT_FNAME1 "boot.scr.uimg"
24 #define SCRIPT_FNAME2 "boot.scr"
26 static int script_check(struct udevice *dev, struct bootflow_iter *iter)
30 /* This only works on block devices */
31 ret = bootflow_iter_uses_blk_dev(iter);
33 return log_msg_ret("blk", ret);
39 * script_fill_info() - Decode the U-Boot script to find out distro info
41 * @bflow: Bootflow to process
42 * @return 0 if OK, -ve on error
44 static int script_fill_info(struct bootflow *bflow)
51 log_debug("parsing bflow file size %x\n", bflow->size);
53 ret = image_locate_script(bflow->buf, bflow->size, NULL, NULL, &data, &len);
55 if (strstr(data, "armbianEnv"))
60 bflow->os_name = strdup(name);
62 return log_msg_ret("os", -ENOMEM);
68 static int script_read_bootflow(struct udevice *dev, struct bootflow *bflow)
70 struct blk_desc *desc = NULL;
71 const char *const *prefixes;
72 struct udevice *bootstd;
76 ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd);
78 return log_msg_ret("std", ret);
80 /* We require a partition table */
85 desc = dev_get_uclass_plat(bflow->blk);
87 prefixes = bootstd_get_prefixes(bootstd);
90 prefix = prefixes ? prefixes[i] : NULL;
92 ret = bootmeth_try_file(bflow, desc, prefix, SCRIPT_FNAME1);
94 ret = bootmeth_try_file(bflow, desc, prefix,
96 } while (ret && prefixes && prefixes[++i]);
98 return log_msg_ret("try", ret);
100 bflow->subdir = strdup(prefix ? prefix : "");
102 return log_msg_ret("prefix", -ENOMEM);
104 ret = bootmeth_alloc_file(bflow, 0x10000, 1);
106 return log_msg_ret("read", ret);
108 ret = script_fill_info(bflow);
110 return log_msg_ret("inf", ret);
112 ret = bootmeth_alloc_other(bflow, "boot.bmp", &bflow->logo,
119 static int script_boot(struct udevice *dev, struct bootflow *bflow)
121 struct blk_desc *desc = dev_get_uclass_plat(bflow->blk);
125 ret = env_set("devtype", blk_get_devtype(bflow->blk));
127 ret = env_set_hex("devnum", desc->devnum);
129 ret = env_set("prefix", bflow->subdir);
130 if (!ret && IS_ENABLED(CONFIG_ARCH_SUNXI) &&
131 !strcmp("mmc", blk_get_devtype(bflow->blk)))
132 ret = env_set_hex("mmc_bootdev", desc->devnum);
134 return log_msg_ret("env", ret);
136 log_debug("devtype: %s\n", env_get("devtype"));
137 log_debug("devnum: %s\n", env_get("devnum"));
138 log_debug("prefix: %s\n", env_get("prefix"));
139 log_debug("mmc_bootdev: %s\n", env_get("mmc_bootdev"));
141 addr = map_to_sysmem(bflow->buf);
142 ret = cmd_source_script(addr, NULL, NULL);
144 return log_msg_ret("boot", ret);
149 static int script_bootmeth_bind(struct udevice *dev)
151 struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
153 plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ?
154 "Script boot from a block device" : "script";
159 static struct bootmeth_ops script_bootmeth_ops = {
160 .check = script_check,
161 .read_bootflow = script_read_bootflow,
162 .read_file = bootmeth_common_read_file,
166 static const struct udevice_id script_bootmeth_ids[] = {
167 { .compatible = "u-boot,script" },
171 U_BOOT_DRIVER(bootmeth_script) = {
172 .name = "bootmeth_script",
173 .id = UCLASS_BOOTMETH,
174 .of_match = script_bootmeth_ids,
175 .ops = &script_bootmeth_ops,
176 .bind = script_bootmeth_bind,