linux-kernel - RE: [PATCH 00/31] Introduced new Cadence USBSSP DRD Driver

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Date:   Thu, 2 Aug 2018 04:26:45 +0000
From:   Pawel Laszczak <pawell@...ence.com>
To:     Roger Quadros <rogerq@...com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        Felipe Balbi <balbi@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Lukasz Tyrala <ltyrala@...ence.com>,
        Alan Douglas <adouglas@...ence.com>
Subject: RE: [PATCH 00/31] Introduced new Cadence USBSSP DRD Driver

> > This patch set introduce new Cadence USBSSP DRD driver to linux
> > kernel.
> >
> > The Cadence USBSSP DRD Driver s a highly configurable IP Core which
> > can be instantiated as Dual-Role Device (DRD), Peripheral Only and
> > Host Only (XHCI) configurations.
> >
> > The current driver has been validated with FPGA burned. We have
> > support for PCIe bus, which is used on FPGA prototyping.
> >
> > The host site of USBSSP controller is compliance with XHCI
> > specification, so it works with standard XHCI linux driver.
> >
> > Also, device side of USBSSP controller was designed in such way to
> > looks like XHCI. It means that most of logic of USBSSP controller is
> > also compliance with XHCI specification.
> >
> > Consequently, the USBSSP driver for peripheral mode is very similar to
> > XHCI driver.
> >
> > This version of driver supports only Device mode but DRD and Host mode
> > will be added in the future.
> >
> 
> Based on the posting date this series looks like v3.
> 
> You should add the version prefix to the patches next time.
> e.g. [PATCH v4 ...]
>
I wanted to start versioning driver after this set patch will be approved. 
Also I have plan to add change-log after approval this patch set. 
I now treat this patch set as Initial version of driver. 
If my approach  is incorrect please correct me ??
Maybe before approval  the better versioning will be [PATCH vrc4] ?
 
> It is also recommended to add a Change-log in the cover letter explaining
> what changes were made in each revision.
> 
I

> There are a bunch of checkpatch warnings in this series.
> You can use ./scripts/checkpatch.pl on the patches and fix the issues.
Yes I know, but most of them are related to "line over 80 characters" 
and " quoted string split across lines" warnings. The first group I could correct
but then I will make readability worse. 
To eliminate the second group I will have to enlarge the first group of warnings and 
the number of  characters in single line will be bigger than 100.  
> > ---
> >
> > Pawel Laszczak (31):
> >   usb: usbssp: Defined register maps and other useful structures.
> >   usb: usbssp: Added some decoding functions.
> >   usb: usbssp: Add trace events used in driver
> >   usb: usbssp: Added USBSSP platform driver
> >   usb: usbssp: Added first part of initialization sequence.
> >   usb: usbssp: added template functions used by upper layer.
> >   usb: usbssp: Initialization - added usbssp_mem_init
> >   usb: usbssp: Added ring and segment handling functions.
> >   usb: usbssp: add implementation of usbssp_mem_cleanup
> >   usb: usbssp: added usbssp_trb_in_td function.
> >   usb: usbssp: added function for stopping driver.
> >   usb: usbssp: added functions for queuing commands.
> >   usb: usbssp: addec procedure for handlin Port Status Change events.
> >   usb: usbssp: added procedure handling command completion events.
> >   usb: usbssp: added device controller error, transfer and SETUP
> >     completion event.
> >   usb: usbssp: added connect/disconnect procedures.
> >   usb: usbssp: added implementation of usbssp_halt_endpoint function.
> >   usb: usbssp: added handling of Port Reset event.
> >   usb: usbssp: added support for USB enumeration process.
> >   usb: usbssp: added queuing procedure for control transfer.
> >   usb: usbssp: added queuing procedure for BULK and INT transfer.
> >   usb: usbssp: added procedure removing request from transfer ring
> >   usb: usbssp: added implementation of transfer events.
> >   usb: usbssp: added detecting command timeout.
> >   usb: usbssp: added implementation of usbssp interface.
> >   usb: usbssp: added endpoint configuration functionality.
> >   usb: usbssp: implements usbssp_gadget_ep_enable function
> >   usb: usbssp: implemented usbssp_gadget_ep_disable function.
> >   usb: usbssp: added support for LPM.
> >   usb: usbssp: added support for TEST_MODE.
> >   usb: usbssp: add pci to platform driver wrapper.
> >
> >  drivers/usb/Kconfig                  |    2 +
> >  drivers/usb/Makefile                 |    2 +
> >  drivers/usb/usbssp/Kconfig           |   29 +
> >  drivers/usb/usbssp/Makefile          |   15 +
> >  drivers/usb/usbssp/gadget-dbg.c      |   39 +
> >  drivers/usb/usbssp/gadget-ep0.c      |  571 +++++
> >  drivers/usb/usbssp/gadget-ext-caps.h |  102 +
> >  drivers/usb/usbssp/gadget-if.c       |  569 +++++
> >  drivers/usb/usbssp/gadget-mem.c      | 1938 +++++++++++++++
> >  drivers/usb/usbssp/gadget-port.c     |  287 +++
> >  drivers/usb/usbssp/gadget-ring.c     | 3452 ++++++++++++++++++++++++++
> >  drivers/usb/usbssp/gadget-trace.c    |   13 +
> >  drivers/usb/usbssp/gadget-trace.h    |  482 ++++
> >  drivers/usb/usbssp/gadget.c          | 1909 ++++++++++++++
> >  drivers/usb/usbssp/gadget.h          | 2373 ++++++++++++++++++
> >  drivers/usb/usbssp/usbssp-pci-wrap.c |  226 ++
> >  drivers/usb/usbssp/usbssp-plat.c     |  186 ++
> >  17 files changed, 12195 insertions(+)  create mode 100644
> > drivers/usb/usbssp/Kconfig  create mode 100644
> > drivers/usb/usbssp/Makefile  create mode 100644
> > drivers/usb/usbssp/gadget-dbg.c  create mode 100644
> > drivers/usb/usbssp/gadget-ep0.c  create mode 100644
> > drivers/usb/usbssp/gadget-ext-caps.h
> >  create mode 100644 drivers/usb/usbssp/gadget-if.c  create mode 100644
> > drivers/usb/usbssp/gadget-mem.c  create mode 100644
> > drivers/usb/usbssp/gadget-port.c  create mode 100644
> > drivers/usb/usbssp/gadget-ring.c  create mode 100644
> > drivers/usb/usbssp/gadget-trace.c  create mode 100644
> > drivers/usb/usbssp/gadget-trace.h  create mode 100644
> > drivers/usb/usbssp/gadget.c  create mode 100644
> > drivers/usb/usbssp/gadget.h  create mode 100644
> > drivers/usb/usbssp/usbssp-pci-wrap.c
> >  create mode 100644 drivers/usb/usbssp/usbssp-plat.c
> >
> 
> --
cheers,
Pawel