| commit | a0f38eeb4994de159bbbd6e9198d949fed50ea1a | [log] [tgz] |
|---|---|---|
| author | Igor Kononenko <i.kononenko.e@gmail.com> | Thu Dec 14 16:27:06 2023 +0300 |
| committer | i.kononenko.e <i.kononenko.e@gmail.com> | Mon Nov 25 22:51:06 2024 +0000 |
| tree | b0de88bd611e1e8ac6cdb6ce82d8593e3f43cfa8 | |
| parent | b68e2285f2ebab000f3d0d7d7cdc6693b09c7e93 [diff] |
usb-ctrl: add a way to mount composite gdts
The usb-vhub has a limited number of usb-gadget ports. The BMC features
might want to attach usb-device count greater than the aspeed-vhub
contains ports. One of the ways to solve the issue could be by attaching
usb-gadget functions to a composite usb interface.
The change brings a way to mount mass_storage and cdc-based devices
under composite device configuration (VID/PID: 1D6B:0104)
This make possible to mount bouth device functions under single
vhub-port.
Tested:
* Insert usb-gadget:mass-storage device is success:
```bash
#: usb-ctrl insert usb0 /tmp/image.iso cdrom
```
* Insert usb-gadget:usb-ecm device for same port is success:
```bash
#: usb-ctrl ecm usb0 on A0:C5:F2:15:B5:89 A0:C5:F2:15:B5:88
```
* the sysfs displays function-descriptors for both interfaces:
```bash
#: root@vegman-r120-020323000A:~# cd /sys/kernel/config/usb_gadget
#: root@vegman-r120-020323000A:~# ls -la ./usb0/functions/
drwxr-xr-x 4 root root 0 Dec 14 12:13 .
drwxr-xr-x 6 root root 0 Dec 14 12:14 ..
drwxr-xr-x 2 root root 0 Dec 14 12:13 ecm.usb0
drwxr-xr-x 3 root root 0 Dec 14 12:11 mass_storage.usb0
```
* eject one of the mounted device works properly, another one stay
online:
```bash
#: usb-ctrl ecm usb0 off
#: ls -la /sys/kernel/config/usb_gadget/usb0/functions/
drwxr-xr-x 3 root root 0 Dec 14 12:19 .
drwxr-xr-x 6 root root 0 Dec 14 12:19 ..
drwxr-xr-x 3 root root 0 Dec 14 12:11 mass_storage.usb0
```
* output on the host side
```bash
#: root@ubuntu:/home/ubuntu# lsusb -d 1d6b:0104 -v
Bus 001 Device 003: ID 1d6b:0104 Linux Foundation Multifunction ...
Device Descriptor:
...
idVendor 0x1d6b Linux Foundation
idProduct 0x0104 Multifunction Composite Gadget
...
Interface Descriptor:
...
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 5 Mass Storage
...
Interface Descriptor:
...
bInterfaceClass 2 Communications
bInterfaceSubClass 6 Ethernet Networking
bInterfaceProtocol 0
iInterface 7 CDC Ethernet Control Model (ECM)
...
```
Change-Id: I6f54ac5c116ee0bb08e9d18c33267f5b401c2c00
Signed-off-by: Igor Kononenko <i.kononenko.e@gmail.com>
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