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