[PATCH v5 0/5] Add support for Fujitsu USB host controller

From: Sneeker Yeh
Date: Sat Feb 21 2015 - 23:26:13 EST

These patches add support for XHCI compliant Host controller found
on Fujitsu Socs, and are based on http://lwn.net/Articles/629162/
The first patch is to add Fujitsu glue layer of Synopsis DesignWare USB3 driver
and last four patch is about quirk implementation of errata in Synopsis
DesignWare USB3 IP.

Patch 1 introduces a quirk with device disconnection management necessary
Synopsys Designware USB3 IP with versions < 3.00a and hardware configuration
DWC_USB3_SUSPEND_ON_DISCONNECT_EN=1. It solves a problem where without the
quirk, that host controller will die after a usb device is disconnected from
port of root hub.

Patch 2 is to set Synopsis quirk in xhci platform driver based on xhci platform

Patch 3 is to add a revison number 2.90a and 3.00a of Synopsis DesignWare USB3
IP core driver.

Patch 4 introduces using a quirk based on a errata of Synopsis
DesignWare USB3 IP which is versions < 3.00a and has hardware configuration
DWC_USB3_SUSPEND_ON_DISCONNECT_EN=1, which cannot be read from software. As a
result this quirk has to be enabled via platform data or device tree.

Patch 5 introduces Fujitsu Specific Glue layer in Synopsis DesignWare USB3 IP

Successfully tested on Fujitsu mb86s7x board.

Changes since v4 (RFC):
- based on Felipe's comment, rename dwc3-mb86s70.c to dwc3-fujitsu.c which is
more generic.
- based on Mathias's comment, remove unhelpful comment, and change the
function name of xhci_try_to_clear_csc() to xhci_late_csc_clear_quirk()
which is more appropriate.

Changes since v3 (RFC):
- based on Mathias's comment, fix bug and using xhci_port_state_to_neutral()
helper function to mask out some RW1C bits, prevent writing back all the
bits read from the PORTSC register.

Changes since v2 (RFC):
- based on Felipe's comment, re-order patches to avoid breaking bisectability,
- based on Felipe's comment, add comment to structure's member, and sort it
- based on Felipe's comment, add another v2.90 revision number in dwc3 IP.

Changes since v1 (RFC):
- based on Arnd's comment, remove entire unnecessary Fujitsu EHCI/OHCI glue,
- based on Felipe's comment, fix mis-using of runtime-pm API and setting dma
mask, remove unnecessary comment, and refactor suspend/resume handler in
Fujitsu Specific Glue layer in dwc3,
- based on Felipe's comment, add more commit log and comments in Synopsis
quirk implementation, and separate it into four patches.

Sneeker Yeh (5):
xhci: add a quirk for device disconnection errata for Synopsis
Designware USB3 core
xhci: Platform: Set Synopsis device disconnection quirk based on
platform data
usb: dwc3: add revision number DWC3_REVISION_290A and
usb: dwc3: Add quirk for Synopsis device disconnection errata
usb: dwc3: add Fujitsu Specific Glue layer

Documentation/devicetree/bindings/usb/dwc3.txt | 17 ++
.../devicetree/bindings/usb/fujitsu-dwc3.txt | 33 ++++
drivers/usb/dwc3/Kconfig | 10 +
drivers/usb/dwc3/Makefile | 1 +
drivers/usb/dwc3/core.c | 6 +
drivers/usb/dwc3/core.h | 6 +
drivers/usb/dwc3/dwc3-fujitsu.c | 206 ++++++++++++++++++++
drivers/usb/dwc3/host.c | 4 +
drivers/usb/dwc3/platform_data.h | 8 +
drivers/usb/host/xhci-hub.c | 4 +
drivers/usb/host/xhci-plat.c | 3 +
drivers/usb/host/xhci.c | 33 ++++
drivers/usb/host/xhci.h | 24 +++
include/linux/usb/xhci_pdriver.h | 4 +
14 files changed, 359 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt
create mode 100644 drivers/usb/dwc3/dwc3-fujitsu.c


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