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Date: Sat, 5 Dec 2020 11:12:44 +0530
From: Aswath Govindraju <a-govindraju@...com>
To: Peter Chen <peter.chen@....com>,
Pawel Laszczak <pawell@...ence.com>,
"rogerq@...com" <rogerq@...com>, "nsekhar@...com" <nsekhar@...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>,
"kurahul@...ence.com" <kurahul@...ence.com>
Subject: RE: [PATCH v4 00/10] Introduced new Cadence USBSSP DRD Driver.
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
> 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
>
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