linux-kernel - [PATCH RFC 0/5] Introduced new Cadence USBSSP DRD Driver.

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Date:   Fri, 26 Jun 2020 06:54:45 +0200
From:   Pawel Laszczak <pawell@...ence.com>
To:     <gregkh@...uxfoundation.org>, <robh+dt@...nel.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <balbi@...nel.org>, <devicetree@...r.kernel.org>
CC:     <dan.carpenter@...cle.com>, <ben.dooks@...ethink.co.uk>,
        <colin.king@...onical.com>, <rogerq@...com>, <peter.chen@....com>,
        <weiyongjun1@...wei.com>, <jpawar@...ence.com>,
        <kurahul@...ene.com>, <sparmar@...ence.com>,
        Pawel Laszczak <pawell@...ence.com>
Subject: [PATCH RFC 0/5] Introduced new Cadence USBSSP DRD Driver.

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 host 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 DT binding.
The patch 2: adds PCI to platform wrapper used on Cadnece testing
             platform. It is FPGA based on platform.
The patches 3-5: 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 (4/5) is little smaller. Patch 3 introduces main
             header file for driver, 4 is the main part that implements all
             functionality of driver and 5 introduces tracepoints.

---

Pawel Laszczak (5):
  dt-bindings: add binding for CDNSP-DRD controller
  usb:cdns3: Add pci to platform driver wrapper
  usb: cdnsp: Device side header file for CDNSP driver
  usb: cdnsp: usb:cdns3 Add main part of Cadence USBSSP DRD Driver
  usb: cdnsp: Add tracepoints for CDNSP driver

 .../devicetree/bindings/usb/cdns-cdnsp.yaml   |  104 +
 drivers/usb/Kconfig                           |    1 +
 drivers/usb/Makefile                          |    1 +
 drivers/usb/cdnsp/Kconfig                     |   49 +
 drivers/usb/cdnsp/Makefile                    |   15 +
 drivers/usb/cdnsp/cdnsp-pci.c                 |  214 ++
 drivers/usb/cdnsp/core.c                      |  632 +++++
 drivers/usb/cdnsp/core.h                      |   90 +
 drivers/usb/cdnsp/debug.h                     |  583 ++++
 drivers/usb/cdnsp/drd.c                       |  372 +++
 drivers/usb/cdnsp/drd.h                       |  127 +
 drivers/usb/cdnsp/ep0.c                       |  482 ++++
 drivers/usb/cdnsp/export.h                    |   36 +
 drivers/usb/cdnsp/gadget.c                    | 1990 ++++++++++++++
 drivers/usb/cdnsp/gadget.h                    | 1586 +++++++++++
 drivers/usb/cdnsp/host.c                      |   74 +
 drivers/usb/cdnsp/mem.c                       | 1340 +++++++++
 drivers/usb/cdnsp/ring.c                      | 2443 +++++++++++++++++
 drivers/usb/cdnsp/trace.c                     |   12 +
 drivers/usb/cdnsp/trace.h                     |  839 ++++++
 20 files changed, 10990 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/cdns-cdnsp.yaml
 create mode 100644 drivers/usb/cdnsp/Kconfig
 create mode 100644 drivers/usb/cdnsp/Makefile
 create mode 100644 drivers/usb/cdnsp/cdnsp-pci.c
 create mode 100644 drivers/usb/cdnsp/core.c
 create mode 100644 drivers/usb/cdnsp/core.h
 create mode 100644 drivers/usb/cdnsp/debug.h
 create mode 100644 drivers/usb/cdnsp/drd.c
 create mode 100644 drivers/usb/cdnsp/drd.h
 create mode 100644 drivers/usb/cdnsp/ep0.c
 create mode 100644 drivers/usb/cdnsp/export.h
 create mode 100644 drivers/usb/cdnsp/gadget.c
 create mode 100644 drivers/usb/cdnsp/gadget.h
 create mode 100644 drivers/usb/cdnsp/host.c
 create mode 100644 drivers/usb/cdnsp/mem.c
 create mode 100644 drivers/usb/cdnsp/ring.c
 create mode 100644 drivers/usb/cdnsp/trace.c
 create mode 100644 drivers/usb/cdnsp/trace.h

-- 
2.17.1