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From:   Peter Chen <peter.chen@nxp.com>
To:     Pawel Laszczak <pawell@cadence.com>
CC:     "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "balbi@kernel.org" <balbi@kernel.org>,
        "colin.king@canonical.com" <colin.king@canonical.com>,
        "rogerq@ti.com" <rogerq@ti.com>,
        "kurahul@cadence.com" <kurahul@cadence.com>,
        "nsekhar@ti.com" <nsekhar@ti.com>
Subject: Re: [PATCH v3 00/10] Introduced new Cadence USBSSP DRD Driver.
Thread-Topic: [PATCH v3 00/10] Introduced new Cadence USBSSP DRD Driver.
Thread-Index: AQHWvn5dJMNE6+//dE+JAvEKZI/EXanW7/CA
Date:   Tue, 24 Nov 2020 07:50:53 +0000
Message-ID: <20201124075023.GC32310@b29397-desktop>
References: <20201119141307.8342-1-pawell@cadence.com>
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On 20-11-19 15:12:57, Pawel Laszczak wrote:
> This patch introduce new Cadence USBSS DRD driver to linux kernel.
>=20
> The Cadence USBSS DRD Controller is a highly configurable IP Core which
> can be instantiated as Dual-Role Device (DRD), Peripheral Only and
> Host Only (XHCI)configurations.
>=20
> The current driver has been validated with FPGA burned. We have support
> for PCIe bus, which is used on FPGA prototyping.
>=20
> The host side of USBSS-DRD controller is compliance with XHCI
> specification, so it works with standard XHCI Linux driver.
>=20
> The device side of USBSS DRD controller is compliant with XHCI.
> The architecture for device side is almost the same as for host side,
> and most of the XHCI specification can be used to understand how
> this controller operates.
>=20
> This controller and driver support Full Speed, Hight Speed, Supper Speed
> and Supper Speed Plus USB protocol.
>=20
> The prefix cdnsp used in driver has chosen by analogy to cdn3 driver.
> The last letter of this acronym means PLUS. The formal name of controller
> is USBSSP but it's to generic so I've decided to use CDNSP.
>=20
> The patch 1: adds support for DRD CDNSP.
> The patch 2: separates common code that can be reusable by cdnsp driver.
> The patch 3: moves reusable code to separate module.
> The patch 4: changes prefixes in reusable code from cdns3 to common cdns.
> The patch 5: adopts gadget_dev pointer in cdns structure to make possible=
=20
>              use it in both drivers.
> The patches 6-8: add the main part of driver and has been intentionally
>              split into 3 part. In my opinion such division should not
>              affect understanding and reviewing the driver, and cause tha=
t
>              main patch (7/8) is little smaller. Patch 6 introduces main
>              header file for driver, 7 is the main part that implements a=
ll
>              functionality of driver and 8 introduces tracepoints.
> The patch 9: Adds cdns3 prefixes to files related with USBSS driver.
> the patch 10: Adds USBSSP DRD IP driver entry to MAINTAINERS file.
>=20
> Changlog from v2:
> - removed not used pdev parameter from cdnsp_read/wite_64 functions
> - fixed incorrect value assigned to CDNSP_ENDPOINTS_NUM (32 -> 31)
> - replaced some constant value with CDNSP_ENDPOINTS_NUM macro
> - replaced 'true' with '1' in bits description in cdnsp-gadget.h file
> - fixed some typos
> - some other less important changes suggested by Peter Chen

Hi Pawel,

I have updated my -next tree as the latest usb-next tree which v5.10-rc4
is included, would you please rebase my tree and send again, I could apply =
your
patches and test, if test could pass, I will apply it to my -next tree.
You don't need to rebase again since it is a huge patch set, will take some
efforts for rebase.

Peter
>=20
> Changlog from v1:
> - updated common code to latest cdns3 driver
> - moved cdnsp driver files to cdns3 as sugested by Peter Chan
> - removed duplicate code from cdnsp_ep0_set_config function
> - added cdns3 prefixes to file related with USBSS driver
> - updated MAINTAINERS file
> - fixed issue with U1
> - fixed issue with L1
> - some less improtant changes sugested by Chunfeng Yun
> ---
>=20
> Pawel Laszczak (10):
>   usb: cdns3: Add support for DRD CDNSP
>   usb: cdns3: Split core.c into cdns3-plat and core.c file
>   usb: cdns3: Moves reusable code to separate module
>   usb: cdns3: Refactoring names in reusable code
>   usb: cdns3: Changed type of gadget_dev in cdns structure
>   usb: cdnsp: Device side header file for CDNSP driver
>   usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver
>   usb: cdnsp: Add tracepoints for CDNSP driver
>   usb: cdns3: Change file names for cdns3 driver.
>   MAINTAINERS: add Cadence USBSSP DRD IP driver entry
>=20
>  MAINTAINERS                                   |    8 +
>  drivers/usb/Makefile                          |    2 +
>  drivers/usb/cdns3/Kconfig                     |   61 +-
>  drivers/usb/cdns3/Makefile                    |   30 +-
>  drivers/usb/cdns3/{debug.h =3D> cdns3-debug.h}  |    0
>  drivers/usb/cdns3/{ep0.c =3D> cdns3-ep0.c}      |    4 +-
>  .../usb/cdns3/{gadget.c =3D> cdns3-gadget.c}    |   28 +-
>  .../usb/cdns3/{gadget.h =3D> cdns3-gadget.h}    |    0
>  drivers/usb/cdns3/cdns3-imx.c                 |    2 +-
>  drivers/usb/cdns3/cdns3-plat.c                |  315 +++
>  drivers/usb/cdns3/{trace.c =3D> cdns3-trace.c}  |    2 +-
>  drivers/usb/cdns3/{trace.h =3D> cdns3-trace.h}  |    6 +-
>  drivers/usb/cdns3/cdnsp-debug.h               |  583 ++++
>  drivers/usb/cdns3/cdnsp-ep0.c                 |  495 ++++
>  drivers/usb/cdns3/cdnsp-gadget.c              | 2017 ++++++++++++++
>  drivers/usb/cdns3/cdnsp-gadget.h              | 1600 +++++++++++
>  drivers/usb/cdns3/cdnsp-mem.c                 | 1325 +++++++++
>  drivers/usb/cdns3/cdnsp-pci.c                 |  255 ++
>  drivers/usb/cdns3/cdnsp-ring.c                | 2439 +++++++++++++++++
>  drivers/usb/cdns3/cdnsp-trace.c               |   12 +
>  drivers/usb/cdns3/cdnsp-trace.h               |  840 ++++++
>  drivers/usb/cdns3/core.c                      |  454 +--
>  drivers/usb/cdns3/core.h                      |   54 +-
>  drivers/usb/cdns3/drd.c                       |  222 +-
>  drivers/usb/cdns3/drd.h                       |   94 +-
>  drivers/usb/cdns3/gadget-export.h             |   22 +-
>  drivers/usb/cdns3/host-export.h               |   13 +-
>  drivers/usb/cdns3/host.c                      |   22 +-
>  28 files changed, 10398 insertions(+), 507 deletions(-)
>  rename drivers/usb/cdns3/{debug.h =3D> cdns3-debug.h} (100%)
>  rename drivers/usb/cdns3/{ep0.c =3D> cdns3-ep0.c} (99%)
>  rename drivers/usb/cdns3/{gadget.c =3D> cdns3-gadget.c} (99%)
>  rename drivers/usb/cdns3/{gadget.h =3D> cdns3-gadget.h} (100%)
>  create mode 100644 drivers/usb/cdns3/cdns3-plat.c
>  rename drivers/usb/cdns3/{trace.c =3D> cdns3-trace.c} (89%)
>  rename drivers/usb/cdns3/{trace.h =3D> cdns3-trace.h} (99%)
>  create mode 100644 drivers/usb/cdns3/cdnsp-debug.h
>  create mode 100644 drivers/usb/cdns3/cdnsp-ep0.c
>  create mode 100644 drivers/usb/cdns3/cdnsp-gadget.c
>  create mode 100644 drivers/usb/cdns3/cdnsp-gadget.h
>  create mode 100644 drivers/usb/cdns3/cdnsp-mem.c
>  create mode 100644 drivers/usb/cdns3/cdnsp-pci.c
>  create mode 100644 drivers/usb/cdns3/cdnsp-ring.c
>  create mode 100644 drivers/usb/cdns3/cdnsp-trace.c
>  create mode 100644 drivers/usb/cdns3/cdnsp-trace.h
>=20
> --=20
> 2.17.1
>=20

--=20

Thanks,
Peter Chen=