Add a bootdev driver for USB host. It can use the distro boot mechanism to locate a file, or any other available bootmeth.
Signed-off-by: Simon Glass sjg@chromium.org ---
(no changes since v1)
common/usb_storage.c | 12 +++++++ drivers/usb/host/Makefile | 4 +++ drivers/usb/host/usb_bootdev.c | 61 ++++++++++++++++++++++++++++++++++ 3 files changed, 77 insertions(+) create mode 100644 drivers/usb/host/usb_bootdev.c
diff --git a/common/usb_storage.c b/common/usb_storage.c index c9e2d7343c..24ccb21701 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -34,6 +34,7 @@
#include <common.h> #include <blk.h> +#include <bootdev.h> #include <command.h> #include <dm.h> #include <errno.h> @@ -239,6 +240,17 @@ static int usb_stor_probe_device(struct usb_device *udev) if (ret) return ret; } + + ret = bootdev_setup_sibling_blk(dev, "usb_bootdev"); + if (ret) { + int ret2; + + ret2 = device_unbind(dev); + if (ret2) + return log_msg_ret("bootdev", ret2); + return log_msg_ret("bootdev", ret); + } + } #else /* We don't have space to even probe if we hit the maximum */ diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index eb6fe9f6b3..742957d199 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -8,6 +8,10 @@ obj-y += usb-uclass.o obj-$(CONFIG_SANDBOX) += usb-sandbox.o endif
+ifdef CONFIG_$(SPL_TPL_)USB_STORAGE +obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += usb_bootdev.o +endif + # ohci obj-$(CONFIG_USB_OHCI_NEW) += ohci-hcd.o obj-$(CONFIG_USB_ATMEL) += ohci-at91.o diff --git a/drivers/usb/host/usb_bootdev.c b/drivers/usb/host/usb_bootdev.c new file mode 100644 index 0000000000..b85f699933 --- /dev/null +++ b/drivers/usb/host/usb_bootdev.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Bootdevice for USB + * + * Copyright 2021 Google LLC + * Written by Simon Glass sjg@chromium.org + */ + +#include <common.h> +#include <bootdev.h> +#include <dm.h> +#include <usb.h> + +static int usb_get_bootflow(struct udevice *dev, struct bootflow_iter *iter, + struct bootflow *bflow) +{ + struct udevice *blk; + int ret; + + ret = bootdev_get_sibling_blk(dev, &blk); + /* + * If there is no media, indicate that no more partitions should be + * checked + */ + if (ret == -EOPNOTSUPP) + ret = -ESHUTDOWN; + if (ret) + return log_msg_ret("blk", ret); + assert(blk); + ret = bootdev_find_in_blk(dev, blk, iter, bflow); + if (ret) + return log_msg_ret("find", ret); + + return 0; +} + +static int usb_bootdev_bind(struct udevice *dev) +{ + struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); + + ucp->prio = BOOTDEVP_3_SCAN_SLOW; + + return 0; +} + +struct bootdev_ops usb_bootdev_ops = { + .get_bootflow = usb_get_bootflow, +}; + +static const struct udevice_id usb_bootdev_ids[] = { + { .compatible = "u-boot,bootdev-usb" }, + { } +}; + +U_BOOT_DRIVER(usb_bootdev) = { + .name = "usb_bootdev", + .id = UCLASS_BOOTDEV, + .ops = &usb_bootdev_ops, + .bind = usb_bootdev_bind, + .of_match = usb_bootdev_ids, +};