Add support for booting from a script loaded over FEL. This mirrors the bootcmd_fel provided by distro boot.
Signed-off-by: Simon Glass sjg@chromium.org Reviewed-by: Mattijs Korpershoek mkorpershoek@baylibre.com ---
Changes in v4: - Reword Kconfig - Add a name for the bootflow
Changes in v2: - Put the FEL bootmeth before all other global bootmeths
boot/Kconfig | 14 ++++++++ boot/Makefile | 1 + boot/bootmeth_fel.c | 84 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+) create mode 100644 boot/bootmeth_fel.c
diff --git a/boot/Kconfig b/boot/Kconfig index ccbc113d8e2..7b399ff00a7 100644 --- a/boot/Kconfig +++ b/boot/Kconfig @@ -589,6 +589,20 @@ config BOOTMETH_EFI_BOOTMGR the EFI binary to be launched is determined. To set the EFI variables use the eficonfig command.
+config BOOTMETH_FEL + bool "Bootdev support for Sunxi FEL" + depends on ARCH_SUNXI + default y + help + Enables support for executing an explicit boot script uploaded before + via the USB FEL protocol. The 'fel_scriptaddr' environment variable + holds the address of this script, taken from the SPL header. + + This method is only available if booting from FEL, i.e. the + 'fel_booted' environment variable is set. + + See https://linux-sunxi.org/FEL/Protocol for more information. + config BOOTMETH_QFW bool "Boot method using QEMU parameters" depends on QFW diff --git a/boot/Makefile b/boot/Makefile index b24f806d5bf..5bee34e8531 100644 --- a/boot/Makefile +++ b/boot/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_$(PHASE_)BOOTMETH_EXTLINUX) += bootmeth_extlinux.o obj-$(CONFIG_$(PHASE_)BOOTMETH_EXTLINUX_PXE) += bootmeth_pxe.o obj-$(CONFIG_$(PHASE_)BOOTMETH_EFILOADER) += bootmeth_efi.o obj-$(CONFIG_$(PHASE_)BOOTMETH_CROS) += bootm.o bootm_os.o bootmeth_cros.o +obj-$(CONFIG_$(PHASE_)BOOTMETH_FEL) += bootmeth_fel.o obj-$(CONFIG_$(PHASE_)BOOTMETH_QFW) += bootmeth_qfw.o obj-$(CONFIG_$(PHASE_)BOOTMETH_SANDBOX) += bootmeth_sandbox.o obj-$(CONFIG_$(PHASE_)BOOTMETH_SCRIPT) += bootmeth_script.o diff --git a/boot/bootmeth_fel.c b/boot/bootmeth_fel.c new file mode 100644 index 00000000000..61332d5a3b4 --- /dev/null +++ b/boot/bootmeth_fel.c @@ -0,0 +1,84 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Bootmethod for sunxi FEL loading + * + * Copyright 2024 Google LLC + * Written by Simon Glass sjg@chromium.org + */ + +#define LOG_CATEGORY UCLASS_BOOTSTD + +#include <bootdev.h> +#include <bootflow.h> +#include <bootmeth.h> +#include <command.h> +#include <dm.h> +#include <env.h> + +static int fel_check(struct udevice *dev, struct bootflow_iter *iter) +{ + return 0; +} + +static int fel_read_bootflow(struct udevice *dev, struct bootflow *bflow) +{ + if (!env_get("fel_booted") || !env_get("fel_scriptaddr")) + return -ENOENT; + + bflow->name = strdup("fel-script"); + if (!bflow->name) + return log_msg_ret("fel", -ENOMEM); + bflow->state = BOOTFLOWST_READY; + + return 0; +} + +static int fel_read_file(struct udevice *dev, struct bootflow *bflow, + const char *file_path, ulong addr, ulong *sizep) +{ + return -ENOSYS; +} + +static int fel_boot(struct udevice *dev, struct bootflow *bflow) +{ + ulong addr; + int ret; + + addr = env_get_hex("fel_scriptaddr", 0); + ret = cmd_source_script(addr, NULL, NULL); + if (ret) + return log_msg_ret("boot", ret); + + return 0; +} + +static int fel_bootmeth_bind(struct udevice *dev) +{ + struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev); + + plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ? + "Sunxi FEL boot over USB" : "FEL"; + plat->flags = BOOTMETHF_GLOBAL; + + return 0; +} + +static struct bootmeth_ops fel_bootmeth_ops = { + .check = fel_check, + .read_bootflow = fel_read_bootflow, + .read_file = fel_read_file, + .boot = fel_boot, +}; + +static const struct udevice_id fel_bootmeth_ids[] = { + { .compatible = "u-boot,fel-bootmeth" }, + { } +}; + +U_BOOT_DRIVER(bootmeth_2fel) = { + .name = "bootmeth_fel", + .id = UCLASS_BOOTMETH, + .of_match = fel_bootmeth_ids, + .ops = &fel_bootmeth_ops, + .bind = fel_bootmeth_bind, +};