]> Git Repo - u-boot.git/blob - cmd/virtio.c
Subtree merge tag 'v6.10-dts' of devicetree-rebasing repo [1] into dts/upstream
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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2018, Tuomas Tynkkynen <[email protected]>
4  * Copyright (C) 2018, Bin Meng <[email protected]>
5  */
6
7 #include <blk.h>
8 #include <command.h>
9 #include <dm.h>
10 #include <virtio_types.h>
11 #include <virtio.h>
12
13 static int virtio_curr_dev;
14
15 static int do_virtio(struct cmd_tbl *cmdtp, int flag, int argc,
16                      char *const argv[])
17 {
18         if (argc == 2 && !strcmp(argv[1], "scan")) {
19                 /*
20                  * make sure all virtio devices are enumerated.
21                  * Do the same as virtio_init(), but also call
22                  * device_probe() for children (i.e. virtio devices)
23                  */
24                 struct udevice *bus, *child;
25
26                 uclass_first_device(UCLASS_VIRTIO, &bus);
27                 if (!bus)
28                         return CMD_RET_FAILURE;
29
30                 while (bus) {
31                         device_foreach_child_probe(child, bus)
32                                 ;
33                         uclass_next_device(&bus);
34                 }
35
36                 return CMD_RET_SUCCESS;
37         }
38
39         return blk_common_cmd(argc, argv, UCLASS_VIRTIO, &virtio_curr_dev);
40 }
41
42 U_BOOT_CMD(
43         virtio, 8, 1, do_virtio,
44         "virtio block devices sub-system",
45         "scan - initialize virtio bus\n"
46         "virtio info - show all available virtio block devices\n"
47         "virtio device [dev] - show or set current virtio block device\n"
48         "virtio part [dev] - print partition table of one or all virtio block devices\n"
49         "virtio read addr blk# cnt - read `cnt' blocks starting at block\n"
50         "     `blk#' to memory address `addr'\n"
51         "virtio write addr blk# cnt - write `cnt' blocks starting at block\n"
52         "     `blk#' from memory address `addr'"
53 );
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