From: Felipe Balbi <balbi@kernel.org>
To: Marcus Folkesson <marcus.folkesson@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonathan Corbet <corbet@lwn.net>,
davem@davemloft.net,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Randy Dunlap <rdunlap@infradead.org>,
Ruslan Bilovol <ruslan.bilovol@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Kate Stewart <kstewart@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 1/3] usb: gadget: ccid: add support for USB CCID Gadget Device
Date: Mon, 18 Jun 2018 11:22:04 +0300 [thread overview]
Message-ID: <87efh4zeqb.fsf@linux.intel.com> (raw)
In-Reply-To: <20180608185443.GB874@gmail.com>
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Hi,
Marcus Folkesson <marcus.folkesson@gmail.com> writes:
> Hi Felipe,
>
> Should I send out v4 or what do you think?
sorry for the delay, have been busy with other tasks.
> On Wed, May 30, 2018 at 04:04:15PM +0200, Marcus Folkesson wrote:
>> Hi Filipe,
>>
>> On Wed, May 30, 2018 at 03:28:18PM +0300, Felipe Balbi wrote:
>> > Marcus Folkesson <marcus.folkesson@gmail.com> writes:
>> >
>> > > Chip Card Interface Device (CCID) protocol is a USB protocol that
>> > > allows a smartcard device to be connected to a computer via a card
>> > > reader using a standard USB interface, without the need for each manufacturer
>> > > of smartcards to provide its own reader or protocol.
>> > >
>> > > This gadget driver makes Linux show up as a CCID device to the host and let a
>> > > userspace daemon act as the smartcard.
>> > >
>> > > This is useful when the Linux gadget itself should act as a cryptographic
>> > > device or forward APDUs to an embedded smartcard device.
>> > >
>> > > Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
>> >
>> > this could be done entirely in userspace with functionfs, why do we need
>> > this part in the kernel? It does very little.
>>
>> Andrzej pointed this out, and I actually do not have any good answer
>> more than that the userspace application could be kept small and the
>> important configuration of the CCID device is done with well (I hope)
>> documented configfs attributes.
can we use existing open source applications without modification by
accepting this glue layer?
--
balbi
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next prev parent reply other threads:[~2018-06-18 9:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-29 18:50 [PATCH v3 1/3] usb: gadget: ccid: add support for USB CCID Gadget Device Marcus Folkesson
2018-05-29 18:50 ` [PATCH v3 2/3] Documentation: usb: add documentation " Marcus Folkesson
2018-05-29 20:27 ` Randy Dunlap
2018-05-30 11:34 ` Marcus Folkesson
2018-05-29 18:50 ` [PATCH v3 3/3] MAINTAINERS: add " Marcus Folkesson
2018-05-30 0:55 ` [PATCH v3 1/3] usb: gadget: ccid: add support for " Andy Shevchenko
2018-05-30 11:24 ` Marcus Folkesson
2018-05-30 11:30 ` Greg Kroah-Hartman
2018-05-30 12:13 ` Marcus Folkesson
2018-05-30 12:20 ` Greg Kroah-Hartman
2018-05-30 12:28 ` Felipe Balbi
2018-05-30 14:04 ` Marcus Folkesson
2018-06-08 18:54 ` Marcus Folkesson
2018-06-18 8:22 ` Felipe Balbi [this message]
2018-06-22 16:48 ` Marcus Folkesson
2018-07-10 18:46 ` Marcus Folkesson
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