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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2018, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
- * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
- */
- #include <common.h>
- #include <blk.h>
- #include <command.h>
- #include <dm.h>
- #include <virtio_types.h>
- #include <virtio.h>
- static int virtio_curr_dev;
- static int do_virtio(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- if (argc == 2 && !strcmp(argv[1], "scan")) {
- /*
- * make sure all virtio devices are enumerated.
- * Do the same as virtio_init(), but also call
- * device_probe() for children (i.e. virtio devices)
- */
- struct udevice *bus, *child;
- uclass_first_device(UCLASS_VIRTIO, &bus);
- if (!bus)
- return CMD_RET_FAILURE;
- while (bus) {
- device_foreach_child_probe(child, bus)
- ;
- uclass_next_device(&bus);
- }
- return CMD_RET_SUCCESS;
- }
- return blk_common_cmd(argc, argv, UCLASS_VIRTIO, &virtio_curr_dev);
- }
- U_BOOT_CMD(
- virtio, 8, 1, do_virtio,
- "virtio block devices sub-system",
- "scan - initialize virtio bus\n"
- "virtio info - show all available virtio block devices\n"
- "virtio device [dev] - show or set current virtio block device\n"
- "virtio part [dev] - print partition table of one or all virtio block devices\n"
- "virtio read addr blk# cnt - read `cnt' blocks starting at block\n"
- " `blk#' to memory address `addr'\n"
- "virtio write addr blk# cnt - write `cnt' blocks starting at block\n"
- " `blk#' from memory address `addr'"
- );
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