From: Guenter Roeck <linux@roeck-us.net>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Felipe Balbi <balbi@kernel.org>
Subject: Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI
Date: Fri, 6 May 2016 07:08:12 -0700 [thread overview]
Message-ID: <572CA54C.6000204@roeck-us.net> (raw)
In-Reply-To: <20160506080840.GB29820@kuha.fi.intel.com>
On 05/06/2016 01:08 AM, Heikki Krogerus wrote:
> Hi,
>
> On Wed, May 04, 2016 at 08:05:44PM -0700, Guenter Roeck wrote:
>> On Tue, Feb 09, 2016 at 07:01:20PM +0200, Heikki Krogerus wrote:
>>> Hi,
>>>
>>> The OS, or more precisely the user space, needs to be able to control
>>> a few things regarding USB Type-C ports. The first thing that must be
>>> allowed to be controlled is the data role. USB Type-C ports will
>>> select the data role randomly with DRP ports. When USB PD is
>>> supported, also independent (from data role) power role swapping can
>>> be supported together with Alternate Mode control.
>>>
>>> I'm proposing with this set a Class for the Type-C connectors that
>>> gives the user space control over those things on top of getting basic
>>> details about the USB Type-C connectors and also partners. The details
>>> include the capabilities of the port, the supported data and power
>>> roles, supported accessories (audio and debug), supported Alternate
>>> Modes, USB PD support and of course the type of the partner (USB, Alt
>>> Mode, Accessory or Charger), and more or less the same details about
>>> the partner.
>>>
>>> I'm not considering cables with this Class, and I have deliberately
>>> left out some more technical details, like cable orientation, firstly
>>> because I did not see much use for the user space from knowing that
>>> an secondly because that kind of details are not always available for
>>> example with UCSI.
>>>
>>> So the interface to the user space is kept as simple as I dared to
>>> make it.
>>>
>>> NOTE: In case there is somebody wondering, this is not adding USB PD
>>> support to Linux kernel. This is just about USB Type-C.
>>>
>>
>> Hello Heikki,
>>
>> we have implemented a prototype TCPM (USB Type-C Protocol Manager)
>> software on top of your patch set. It will support TCPCI as well
>> as other USB-C controllers such as FUSB302. The plan is to use
>> this software in systems where no separate controller is available.
>
> Interesting. So I'm guessing TCPM is actually an implementation USB PD
> software stack, no? AFAIK FUSB302 has USB PD transceiver, right?
>
Yes, both correct.
>> Is there any chance to advance this patch set ? It would be instrumental
>> to get a unified interface to user space.
>
> I don't have not made any new code for the class driver yet, but I'm
> attempting to prepare v2 next week.
>
Excellent! Please cc me - either this e-mail address or groeck@chromium.org.
Thanks,
Guenter
next prev parent reply other threads:[~2016-05-06 14:08 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 17:01 [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus
2016-02-09 17:01 ` [PATCH 1/3] usb: USB Type-C Connector Class Heikki Krogerus
2016-02-09 18:20 ` Greg KH
2016-02-10 10:38 ` Heikki Krogerus
2016-02-10 17:26 ` Greg KH
2016-02-11 14:07 ` Heikki Krogerus
2016-02-10 10:49 ` Oliver Neukum
2016-02-10 11:05 ` Andy Shevchenko
2016-02-10 11:11 ` Heikki Krogerus
2016-02-10 11:14 ` Andy Shevchenko
2016-02-10 11:23 ` Heikki Krogerus
2016-02-15 15:16 ` Oliver Neukum
2016-02-11 8:55 ` Felipe Balbi
2016-02-11 9:08 ` Oliver Neukum
2016-02-11 14:51 ` Heikki Krogerus
2016-02-11 14:36 ` Heikki Krogerus
2016-02-11 14:56 ` Oliver Neukum
2016-02-17 14:07 ` Oliver Neukum
2016-02-18 8:47 ` Heikki Krogerus
2016-02-18 9:21 ` Oliver Neukum
2016-02-18 13:09 ` Heikki Krogerus
2016-02-18 9:35 ` Oliver Neukum
2016-02-18 13:25 ` Heikki Krogerus
2016-02-18 13:44 ` Oliver Neukum
2016-02-18 15:13 ` Heikki Krogerus
2016-02-26 13:09 ` Heikki Krogerus
2016-02-09 17:01 ` [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Heikki Krogerus
2016-02-09 18:21 ` Greg KH
2016-02-10 10:30 ` Heikki Krogerus
2016-02-10 17:20 ` Greg KH
2016-02-11 13:50 ` Heikki Krogerus
2016-02-15 15:30 ` Oliver Neukum
2016-02-16 9:22 ` Heikki Krogerus
2016-02-16 13:39 ` Oliver Neukum
2016-02-17 7:58 ` Heikki Krogerus
2016-02-17 9:03 ` Oliver Neukum
2016-02-17 10:29 ` Felipe Balbi
2016-02-17 10:36 ` Oliver Neukum
2016-02-17 11:11 ` Heikki Krogerus
2016-02-17 13:36 ` Felipe Balbi
2016-02-17 14:28 ` Heikki Krogerus
2016-02-18 9:07 ` Peter Chen
2016-02-18 10:44 ` Heikki Krogerus
2016-02-18 10:37 ` Rajaram R
2016-02-18 10:47 ` Heikki Krogerus
2016-02-18 11:06 ` Rajaram R
2016-02-17 13:34 ` Felipe Balbi
2016-02-17 13:51 ` Oliver Neukum
2016-02-18 7:08 ` Felipe Balbi
2016-02-18 10:18 ` Oliver Neukum
2016-02-18 10:30 ` Felipe Balbi
2016-02-18 10:40 ` Oliver Neukum
2016-02-18 9:29 ` Peter Chen
2016-02-18 9:44 ` Oliver Neukum
2016-02-10 11:19 ` Oliver Neukum
2016-02-10 12:04 ` Heikki Krogerus
2016-02-10 11:56 ` Andy Shevchenko
2016-02-10 13:21 ` Oliver Neukum
2016-02-10 14:02 ` Andy Shevchenko
2016-02-10 15:11 ` Bjørn Mork
2016-02-11 8:26 ` Andy Shevchenko
2016-02-11 8:59 ` Bjørn Mork
2016-02-10 14:15 ` Oliver Neukum
2016-02-10 14:24 ` Andy Shevchenko
2016-02-10 15:08 ` Oliver Neukum
[not found] ` <CAHp75VfmGsskf7Cmni3b4=tCbkPsR8d3jPYiv93Lm6DM9gq1-g@mail.gmail.com>
2016-02-11 8:13 ` Fwd: " Andy Shevchenko
2016-02-11 14:10 ` Heikki Krogerus
2016-02-10 13:04 ` Oliver Neukum
2016-02-11 14:08 ` Heikki Krogerus
2016-02-09 17:01 ` [PATCH 3/3] usb: type-c: UCSI ACPI driver Heikki Krogerus
2016-02-09 18:22 ` Greg KH
2016-02-10 10:23 ` Heikki Krogerus
2016-02-17 18:53 ` [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Oliver Neukum
2016-02-18 9:21 ` Heikki Krogerus
2016-02-17 19:34 ` Rajaram R
2016-02-18 11:05 ` Heikki Krogerus
2016-02-18 11:15 ` Oliver Neukum
2016-05-05 3:05 ` Guenter Roeck
2016-05-06 6:50 ` Felipe Balbi
2016-05-06 8:05 ` Guenter Roeck
2016-05-06 8:29 ` Heikki Krogerus
2016-05-06 14:10 ` Guenter Roeck
2016-05-06 8:23 ` Heikki Krogerus
2016-05-06 8:08 ` Heikki Krogerus
2016-05-06 14:08 ` Guenter Roeck [this message]
2016-05-11 3:14 ` Guenter Roeck
2016-05-11 9:40 ` Heikki Krogerus
2016-05-11 14:47 ` Guenter Roeck
2016-05-13 14:23 ` Heikki Krogerus
2016-05-13 17:48 ` Guenter Roeck
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