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Date: Tue, 24 Nov 2020 07:50:53 +0000
From: Peter Chen <peter.chen@....com>
To: Pawel Laszczak <pawell@...ence.com>
CC: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"balbi@...nel.org" <balbi@...nel.org>,
"colin.king@...onical.com" <colin.king@...onical.com>,
"rogerq@...com" <rogerq@...com>,
"kurahul@...ence.com" <kurahul@...ence.com>,
"nsekhar@...com" <nsekhar@...com>
Subject: Re: [PATCH v3 00/10] Introduced new Cadence USBSSP DRD Driver.
On 20-11-19 15:12:57, Pawel Laszczak wrote:
> This patch introduce new Cadence USBSS DRD driver to linux kernel.
>
> 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.
>
> The current driver has been validated with FPGA burned. We have support
> for PCIe bus, which is used on FPGA prototyping.
>
> The host side of USBSS-DRD controller is compliance with XHCI
> specification, so it works with standard XHCI Linux driver.
>
> 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.
>
> This controller and driver support Full Speed, Hight Speed, Supper Speed
> and Supper Speed Plus USB protocol.
>
> 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.
>
> 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
> 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 that
> main patch (7/8) is little smaller. Patch 6 introduces main
> header file for driver, 7 is the main part that implements all
> 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.
>
> 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
>
> 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
> ---
>
> 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
>
> MAINTAINERS | 8 +
> drivers/usb/Makefile | 2 +
> drivers/usb/cdns3/Kconfig | 61 +-
> drivers/usb/cdns3/Makefile | 30 +-
> drivers/usb/cdns3/{debug.h => cdns3-debug.h} | 0
> drivers/usb/cdns3/{ep0.c => cdns3-ep0.c} | 4 +-
> .../usb/cdns3/{gadget.c => cdns3-gadget.c} | 28 +-
> .../usb/cdns3/{gadget.h => cdns3-gadget.h} | 0
> drivers/usb/cdns3/cdns3-imx.c | 2 +-
> drivers/usb/cdns3/cdns3-plat.c | 315 +++
> drivers/usb/cdns3/{trace.c => cdns3-trace.c} | 2 +-
> drivers/usb/cdns3/{trace.h => 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 => cdns3-debug.h} (100%)
> rename drivers/usb/cdns3/{ep0.c => cdns3-ep0.c} (99%)
> rename drivers/usb/cdns3/{gadget.c => cdns3-gadget.c} (99%)
> rename drivers/usb/cdns3/{gadget.h => cdns3-gadget.h} (100%)
> create mode 100644 drivers/usb/cdns3/cdns3-plat.c
> rename drivers/usb/cdns3/{trace.c => cdns3-trace.c} (89%)
> rename drivers/usb/cdns3/{trace.h => 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
>
> --
> 2.17.1
>
--
Thanks,
Peter Chen
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