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virtio: cmd: Add virtio command for virtio devices

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Add 'virtio' command in U-Boot command line.

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Tuomas Tynkkynen 2018-10-15 02:21:12 -07:00 committed by Simon Glass
parent f4802209e5
commit 78e12901f3
3 changed files with 46 additions and 0 deletions
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7
cmd/Kconfig
View file

@ -1065,6 +1065,13 @@ config CMD_USB_MASS_STORAGE
help
USB mass storage support
config CMD_VIRTIO
bool "virtio"
depends on VIRTIO
default y if VIRTIO
help
VirtIO block device support
config CMD_AXI
bool "axi"
depends on AXI

1
cmd/Makefile
View file

@ -135,6 +135,7 @@ obj-$(CONFIG_CMD_UBI) += ubi.o
obj-$(CONFIG_CMD_UBIFS) += ubifs.o
obj-$(CONFIG_CMD_UNIVERSE) += universe.o
obj-$(CONFIG_CMD_UNZIP) += unzip.o
obj-$(CONFIG_CMD_VIRTIO) += virtio.o
obj-$(CONFIG_CMD_LZMADEC) += lzmadec.o
obj-$(CONFIG_CMD_USB) += usb.o disk.o

38
cmd/virtio.c Normal file
View file

@ -0,0 +1,38 @@
// 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 <command.h>
#include <dm.h>
#include <virtio_types.h>
#include <virtio.h>
static int virtio_curr_dev;
static int do_virtio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (argc == 2 && !strcmp(argv[1], "scan")) {
/* make sure all virtio devices are enumerated */
virtio_init();
return CMD_RET_SUCCESS;
}
return blk_common_cmd(argc, argv, IF_TYPE_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'"
);