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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;
int ret;
ret = uclass_first_device(UCLASS_VIRTIO, &bus);
if (ret)
return CMD_RET_FAILURE;
while (bus) {
device_foreach_child_probe(child, bus)
;
ret = uclass_next_device(&bus);
if (ret)
break;
}
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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