[PATCH, v6 0/5] Add MediaTek USB3 DRD Driver

[Chunfeng Yun]

These patches introduce the MediaTek USB3 dual-role controller
driver.

The driver can be configured as Dual-Role Device (DRD),
Peripheral Only and Host Only (xHCI) modes. It works well
with Mass Storage, RNDIS and g_zero on FS/HS and SS. And it is
tested on MT8173 platform which only contains USB2.0 device IP,
and on MT6290 platform which contains USB3.0 device IP.

Change in v6:
1. handle endianness of GPD and SETUP data
2. remove dummy error log and return suitable error number
3. cancel delay work when deregiseter driver

Change in v5:
1. modify some comments
2. rename some unsuitable variables
3. add reg-names property for host node
4. add USB_MTU3_DEBUG to control debug messages

Change in v4:
1. fix build errors on non-mediatek platforms
2. provide manual dual-role switch via debugfs instead of sysfs

Change in v3:
1. fix some typo error
2. rename mtu3.txt to mt8173-mtu3.txt

Change in v2:
1. modify binding docs according to suggestions
2. modify some comments and remove some dummy blank lines
3. fix memory leakage

Chunfeng Yun (5):
  dt-bindings: mt8173-xhci: support host side of dual-role mode
  dt-bindings: mt8173-mtu3: add devicetree bindings
  usb: xhci-mtk: make IPPC register optional
  usb: Add MediaTek USB3 DRD Driver
  arm64: dts: mediatek: add USB3 DRD driver

 .../devicetree/bindings/usb/mt8173-mtu3.txt        |   87 ++
 .../devicetree/bindings/usb/mt8173-xhci.txt        |   54 +-
 arch/arm64/boot/dts/mediatek/mt8173-evb.dts        |   46 +-
 arch/arm64/boot/dts/mediatek/mt8173.dtsi           |   29 +-
 drivers/usb/Kconfig                                |    2 +
 drivers/usb/Makefile                               |    1 +
 drivers/usb/host/xhci-mtk.c                        |   36 +-
 drivers/usb/mtu3/Kconfig                           |   54 ++
 drivers/usb/mtu3/Makefile                          |   19 +
 drivers/usb/mtu3/mtu3.h                            |  422 ++++++++++
 drivers/usb/mtu3/mtu3_core.c                       |  871 +++++++++++++++++++
 drivers/usb/mtu3/mtu3_dr.c                         |  379 +++++++++
 drivers/usb/mtu3/mtu3_dr.h                         |  108 +++
 drivers/usb/mtu3/mtu3_gadget.c                     |  731 ++++++++++++++++
 drivers/usb/mtu3/mtu3_gadget_ep0.c                 |  883 ++++++++++++++++++++
 drivers/usb/mtu3/mtu3_host.c                       |  294 +++++++
 drivers/usb/mtu3/mtu3_hw_regs.h                    |  473 +++++++++++
 drivers/usb/mtu3/mtu3_plat.c                       |  490 +++++++++++
 drivers/usb/mtu3/mtu3_qmu.c                        |  599 +++++++++++++
 drivers/usb/mtu3/mtu3_qmu.h                        |   43 +
 20 files changed, 5603 insertions(+), 18 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/usb/mt8173-mtu3.txt
 create mode 100644 drivers/usb/mtu3/Kconfig
 create mode 100644 drivers/usb/mtu3/Makefile
 create mode 100644 drivers/usb/mtu3/mtu3.h
 create mode 100644 drivers/usb/mtu3/mtu3_core.c
 create mode 100644 drivers/usb/mtu3/mtu3_dr.c
 create mode 100644 drivers/usb/mtu3/mtu3_dr.h
 create mode 100644 drivers/usb/mtu3/mtu3_gadget.c
 create mode 100644 drivers/usb/mtu3/mtu3_gadget_ep0.c
 create mode 100644 drivers/usb/mtu3/mtu3_host.c
 create mode 100644 drivers/usb/mtu3/mtu3_hw_regs.h
 create mode 100644 drivers/usb/mtu3/mtu3_plat.c
 create mode 100644 drivers/usb/mtu3/mtu3_qmu.c
 create mode 100644 drivers/usb/mtu3/mtu3_qmu.h

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1.7.9.5