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: Tue, 29 Sep 2020 09:33:03 +0300 [thread overview]
Message-ID: <87k0wd9jog.fsf@kernel.org> (raw)
In-Reply-To: <ce4fc6f6-726e-48b3-97bb-0de2b3801615@www.fastmail.com>
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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?
--
balbi
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next prev parent reply other threads:[~2020-09-29 6:33 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 [this message]
2020-09-29 23:16 ` Sid Spry
2020-10-02 6:54 ` Felipe Balbi
2020-10-03 2:07 ` Sid Spry
2020-10-03 6:07 ` Felipe Balbi
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