On Tue, Feb 9, 2016 at 10:31 PM, Heikki Krogerus <heikki.kroge...@linux.intel.com> 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
Since we have capability details of ports in user space, I believe cable capability is also necessary for policy decision(power, alt mode). Is that something we are cautiously leaving out ? pls explain > 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. > > > Heikki Krogerus (3): > usb: USB Type-C Connector Class > usb: type-c: USB Type-C Connector System Software Interface > usb: type-c: UCSI ACPI driver > > drivers/usb/Kconfig | 2 + > drivers/usb/Makefile | 2 + > drivers/usb/type-c/Kconfig | 25 +++ > drivers/usb/type-c/Makefile | 3 + > drivers/usb/type-c/typec.c | 446 ++++++++++++++++++++++++++++++++++++++++ > drivers/usb/type-c/ucsi.c | 450 > +++++++++++++++++++++++++++++++++++++++++ > drivers/usb/type-c/ucsi.h | 219 ++++++++++++++++++++ > drivers/usb/type-c/ucsi_acpi.c | 133 ++++++++++++ > include/linux/usb/typec.h | 114 +++++++++++ > 9 files changed, 1394 insertions(+) > create mode 100644 drivers/usb/type-c/Kconfig > create mode 100644 drivers/usb/type-c/Makefile > create mode 100644 drivers/usb/type-c/typec.c > create mode 100644 drivers/usb/type-c/ucsi.c > create mode 100644 drivers/usb/type-c/ucsi.h > create mode 100644 drivers/usb/type-c/ucsi_acpi.c > create mode 100644 include/linux/usb/typec.h > > -- > 2.7.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
