From: Felipe Balbi <balbi@kernel.org>
To: Sid Spry <sid@aeam.us>, linux-usb@vger.kernel.org
Subject: Re: ConfigFS: bcdUSB forced to 0x0210
Date: Fri, 02 Oct 2020 09:54:39 +0300 [thread overview]
Message-ID: <87ft6xxgls.fsf@kernel.org> (raw)
In-Reply-To: <8baba7f6-35aa-49a6-89eb-f57164cab41f@www.fastmail.com>
[-- Attachment #1: Type: text/plain, Size: 2364 bytes --]
Hi,
"Sid Spry" <sid@aeam.us> writes:
> On Tue, Sep 29, 2020, at 1:33 AM, Felipe Balbi wrote:
>>
>> Hi,
>>
>> "Sid Spry" <sid@aeam.us> writes:
>> > Hi, I can't enable USB3 with e.g. f_ncm because bcdUSB is always reset to 0x0210:
>> >
>> > $ sudo sh -c 'echo "0x0300" > /sys/kernel/config/usb_gadget/g11/bcdUSB'
>> > $ cat /sys/kernel/config/usb_gadget/g11/bcdUSB
>> > 0x0300
>> > $ sudo sh -c 'echo "fe800000.usb" > /sys/kernel/config/usb_gadget/g11/UDC'
>> > $ cat /sys/kernel/config/usb_gadget/g11/bcdUSB
>> > 0x0210
>> > $ tree /sys/kernel/config/usb_gadget/g11
>> > /sys/kernel/config/usb_gadget/g11
>> > ├── bcdDevice
>> > ├── bcdUSB
>> > ├── bDeviceClass
>> > ├── bDeviceProtocol
>> > ├── bDeviceSubClass
>> > ├── bMaxPacketSize0
>> > ├── configs
>> > │ └── c.1
>> > │ ├── bmAttributes
>> > │ ├── MaxPower
>> > │ ├── ncm.0 -> ../../../../usb_gadget/g11/functions/ncm.0
>> > │ └── strings
>> > │ └── 0x409
>> > │ └── configuration
>> > ├── functions
>> > │ └── ncm.0
>> > │ ├── dev_addr
>> > │ ├── host_addr
>> > │ ├── ifname
>> > │ ├── os_desc
>> > │ │ └── interface.ncm
>> > │ │ ├── compatible_id
>> > │ │ └── sub_compatible_id
>> > │ └── qmult
>> > ├── idProduct
>> > ├── idVendor
>> > ├── max_speed
>> > ├── os_desc
>> > │ ├── b_vendor_code
>> > │ ├── qw_sign
>> > │ └── use
>> > ├── strings
>> > │ └── 0x409
>> > │ ├── manufacturer
>> > │ ├── product
>> > │ └── serialnumber
>> > └── UDC
>> >
>> > Board is a RK3399 based RockPro64.
>>
>> what's your max_speed?
>>
>
> $ cat /sys/kernel/config/usb_gadget/g11/max_speed
> super-speed
>
> Looks ok. From Windows, the xHCI driver reports that the device supports
> super speed but chooses high speed. I can't see this info from a Linux host.
It's probably failing Rx.Detect and falling back to high-speed. Which
USB Peripheral Controller is that?
--
balbi
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 857 bytes --]
next prev parent reply other threads:[~2020-10-02 6:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 2:40 ConfigFS: bcdUSB forced to 0x0210 Sid Spry
2020-09-29 6:33 ` Felipe Balbi
2020-09-29 23:16 ` Sid Spry
2020-10-02 6:54 ` Felipe Balbi [this message]
2020-10-03 2:07 ` Sid Spry
2020-10-03 6:07 ` Felipe Balbi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87ft6xxgls.fsf@kernel.org \
--to=balbi@kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=sid@aeam.us \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.