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Date: Sat, 5 Dec 2020 11:13:38 +0000
From: Peter Chen <peter.chen@....com>
To: Aswath Govindraju <a-govindraju@...com>,
Pawel Laszczak <pawell@...ence.com>
CC: "rogerq@...com" <rogerq@...com>, "nsekhar@...com" <nsekhar@...com>,
"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>,
"kurahul@...ence.com" <kurahul@...ence.com>
Subject: Re: [PATCH v4 00/10] Introduced new Cadence USBSSP DRD Driver.
On 20-12-05 11:12:44, Aswath Govindraju wrote:
> Hi,
> On 04/12/20 6:49 am, Peter Chen 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.
> >>
> >
> > Hi Roger & Sekhar,
> >
> > Would you please test this patch set and see if it works well at TI platforms?
> >
>
> Tested this patch series on TI SOC J7200. All given below tests were
> performed and they passed,
>
> Host mode:
> - Connected a mass storage device (USB flash stick) and performed read
> and write tests
> - Connected mouse and keyboard to check enumeration
>
> Device mode:
> - Tested g_mass_storage module by performing read and write
> - Tested g_ether module by the pinging host and device from either sides
>
> OTG:
> - Switching between host and device mode based on the device connected.
>
>
> Tested-by: Aswath Govindraju <a-govindraju@...com>
Thanks Aswath.
Basic functions at NXP also work. Pawel, you could post your v5 with my last comments.
Peter
>
> Thanks,
> Aswath
>
> > Peter
> >
> >> Changlog from v3:
> >> - added 'T' to MAINTAINERS file for CDNSP entry
> >> - updated common code with latest cdns3 fixes
> >>
> >> 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
> >>
> >> 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 | 9 +
> >> 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 | 455 +--
> >> 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, 10400 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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