The musb_dsps driver is special in that the parent (glue) device's
driver is accessing registers mapped by the child. The clock is however
shared and is managed by the grandparent device.

Since commit 869c5978 ("usb: musb: dsps: add support for suspend and
resume") the dsps driver has been accessing these registers as part of
suspend and resume.

The parent driver obviously cannot runtime resume the child during
system suspend and is currently relying on the fact that the child will
be RPM_ACTIVE throughout suspend. The suspend implementation also makes
sure to check that the child is indeed present (and hence the clock
enabled) before accessing the registers.

Let's add an explicit runtime resume of the glue device itself to enable
the clock before doing the register accesses in case these assumptions ever
change (i.e. if the child is left runtime suspended).

Note that the glue-timer cancellation is moved after the child-presence
check to keep error handling simple. This should be fine as the timer is
not setup until the controller is being registered and at that time
glue->musb and its driver data have already been initialised.

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure that the controller is runtime resumed when system suspending
to avoid an external abort when accessing the interrupt registers:

  Unhandled fault: external abort on non-linefetch (0x1008) at 0xd025840a
  ...
  [<c05481a4>] (musb_default_readb) from [<c0545abc>] (musb_disable_interrupts+0x84/0xa8)
  [<c0545abc>] (musb_disable_interrupts) from [<c0546b08>] (musb_suspend+0x38/0xb8)
  [<c0546b08>] (musb_suspend) from [<c04a57f8>] (platform_pm_suspend+0x3c/0x64)

This is easily reproduced on a BBB by enabling the peripheral port only
(as the host port may enable the shared clock) and keeping it
disconnected so that the controller is runtime suspended. (Well, you
would also need to the not-yet-merged am33xx-suspend patches by Dave
Gerlach to be able to suspend the BBB.)

This is a regression that was introduced by commit 1c4d0b4e ("usb:
musb: Remove pm_runtime_set_irq_safe") which allowed the parent glue
device to runtime suspend and thereby exposed a couple of older issues:

Register accesses without explicitly making sure the controller is
runtime resumed during suspend was first introduced by commit c338412b
("usb: musb: unconditionally save and restore the context on suspend")
in 3.14.

Commit a1fc1920 ("usb: musb: core: make sure musb is in RPM_ACTIVE on
resume") later started setting the RPM status to active during resume,
and this was also implicitly relying on the parent always being active.
Since commit 71723f95 ("PM / runtime: print error when activating a
child to unactive parent") this now also results in the following
warning:

  musb-hdrc musb-hdrc.0: runtime PM trying to activate child device
    musb-hdrc.0 but parent (47401400.usb) is not active

This patch has been verified on 4.13-rc2, 4.12 and 4.9 using a BBB
(the dsps glue would always be active also in 4.8).

Fixes: c338412b ("usb: musb: unconditionally save and restore the context on suspend")
Fixes: a1fc1920 ("usb: musb: core: make sure musb is in RPM_ACTIVE on resume")
Fixes: 1c4d0b4e ("usb: musb: Remove pm_runtime_set_irq_safe")
Cc: stable <stable@vger.kernel.org>	# 4.8+
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Dave Gerlach <d-gerlach@ti.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The fifo memory allocation in mode_2_cfg[] doesn't utilize all the 4KB
memory.

Increse some endpoint fifo buffers to fully use all the 4KB memory. Now
we can support more webcam usecases on DA8xx.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

There are multiple places in usb core or controller driver which returns
-EMSGSIZE when a class driver queueing urb failed, so the "Message too
long" log doesn't help much for understanding the error.

Let the musb driver to specifically print a error message when
musb_urb_enqueue() returns -EMSGSIZE.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Print an error message with qh maxpacket size and hb_mult when hwep
allocation failed, so we have a better idea why it is failed.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Add helper function musb_ep_xfertype_string() to return the ep transfer
type string.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge tag 'usb-ci-v4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next

Peter writes:

Chipidea changes for v4.14-rc1
- Add chipidea support at Nvidia SoCs
- Improvement for extcon support
- Some code refines

Casting between an 'int' and a pointer causes a warning on
64-bit architectures in compile-testing this driver:

drivers/phy/ralink/phy-ralink-usb.c: In function 'ralink_usb_phy_probe':
drivers/phy/ralink/phy-ralink-usb.c:195:13: error: cast from pointer to
integer of different size [-Werror=pointer-to-int-cast]

This changes the code to cast to uintptr_t instead. This is
guaranteed to do what we want on all architectures and avoids
the warning.

Fixes: 2411a736 ("phy: ralink-usb: add driver for Mediatek/Ralink")
Acked-by: John Crispin <john@phrozen.org>
Tested-by Harvey Hunt <harvey.hunt@imgtec.com>
Reviewed-by Harvey Hunt <harvey.hunt@imgtec.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

All of these Tegra SoC generations have a ChipIdea UDC IP block that can
be used for device mode communication with a host. Implement rudimentary
support that doesn't allow switching between host and device modes.
Tested-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Thierry Reding <treding@nvidia.com>
[digetx@gmail.com: rebased patches and added DMA alignment quirk for Tegra20]
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

NVIDIA Tegra20 UDC can't cope with unaligned DMA and require a USB gadget
quirk that avoids SKB buffer alignment to be set in order to make Ethernet
Gadget working. Later Tegra generations do not require that quirk. Let's
add a new platform data flag that allows to enable USB gadget quirk for
platforms that require it.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

Merge tag 'phy-for-4.14_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy into usb-next

Kishon writes:

phy: for 4.14

 *) Add USB PHY driver for Ralink SoC
 *) Make phy-mt65xx-usb3 driver support PCIe and SATA phy
 *) Add mediatek directory and rename phy-mt65xx-usb3 to phy-mtk-tphy.c
    since it now supports USB3.0, PCIe and SATA PHYs
 *) Make sun4i-usb-phy driver support USB PHYs for A83T SoC
 *) Make phy-qcom-qmp driver support USB PHYs for IPQ8074 SoC
 *) Make rockchip-inno-usb2 driver support usb2-phy for rv1108 SoC
 *) Minor fixes in phy drivers
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Felipe writes:

usb: changes for v4.14 merge window

Not a big pull request this time around. Only 49 non-merge
commits. This pull request is, however, all over the place. Most of
the changes are in the bdc driver adding support for USB Phy layer and
PM.

Renesas adds support for R-Car H3 ES2.0 and R-Car M3-W SoCs.

Also here is PM_RUNTIME support for dwc3-keystone.

UDC Core got a DMA unmap fix to make sure we only unmap requests that
were, indeed, mapped.

Other than these, we have a lot of cleanups, many of them adding
'const' to several places.

We want to timeout with try set to zero so this should be a pre-op
instead of post-op.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

This line was indented further that it should have been.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The "check" variable isn't necessarily initialized when we print it out
in the debugging messages.  It's a pretty haphazard affair and it
doesn't matter very much what we initialize "check" to.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

In order to silent the 'W=1' compile warning:

drivers/phy/rockchip/phy-rockchip-typec.c: In function 'tcphy_get_mode':
drivers/phy/rockchip/phy-rockchip-typec.c:625:7: warning: variable 'dfp'
set but not used [-Wunused-but-set-variable]

Cc: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

This adds support usb2-phy for rv1108 SoCs and amend phy Documentation.
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Add otg-mux property to support multiplexed interrupt in otg-port
on some Rockchip SoC (e.g RV1108).
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The otg-id/otg-bvalid/linestate interrupts are multiplexed together
in otg-port on some Rockchip SoC (e.g RV1108), this patch add support
for it.
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Add rockchip,usbgrf property to support the registers of usb-phy
that are distributed in grf and usbgrf on some special Rockchip
SoCs (e.g RV1108).
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The registers of usb-phy are distributed in grf and usbgrf on some
Rockchip SoCs (e.g RV1108), this patch add a new rockchip,usbgrf
property to support this companion grf design.
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The A83T has 3 USB PHYs, 1 for OTG, 1 for standard USB, 1 for USB HSIC.
The phy initialization procedure is very different from other SoCs, but
the PMU bits are the same, with additional bits for HSIC.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

On the Allwinner A83T SoC, the last USB PHY is an HSIC PHY. It requires
two clocks instead of one.

On all Allwinner SoCs that share the common USB PHY design supported by
the phy-sun4i-usb driver, the first PHY is always tied to OTG, and there
is at most one HSIC PHY, typically the last.

In this patch we take advantage of these known constraints and store an
index in the compatible-string-related config structure describing which
PHY is HSIC, needing the extra hsic_12M clock.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The A83T has 3 USB PHYs, 1 for OTG, 1 for standard USB, 1 for USB HSIC.

Add a compatible string for it, and describe the needed properties.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The Allwinner H3 SoC has 4 USB PHYs, so it needs four sets of pmu
regions, clocks, resets, and optional vbus properties. These were
not described when the H3 compatible string was added.

Fixes: 626a630e ("phy-sun4i-usb: Add support for the host usb-phys
		      found on the H3 SoC")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Add a driver to setup the USB phy on Mediatek/Ralink SoCs.
The driver sets up power and host mode, but also needs to
configure PHY registers for the MT7628 and MT7688.
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Add a binding for the USB phy on Mediatek/Ralink SoCs.
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

reduce the boilerplate code to get the specific data
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The driver is actually for T-PHY which supports USB3.0, PCIe and SATA,
and supports more SoCs now, but not just only for series of mt65xx SoCs,
so the name of file, data struct, functions etc with 'mt65xx' may cause
misunderstanding when new SoCs are supported. Here rename them to reflect
the real functions and also enhance readability.

And also update MAINTAINERS file to reflect the correct driver
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

add support for PCIe and SATA, also add some new compatibles.

due to phy-mt65xx-usb.txt holds the bindings for all mediatek SoCs
with T-PHY controller, change the name to phy-mtk-tphy.txt to
reflect that.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

This patch adds SATA setting part.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

This patch adds PCIe PHY setting part.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The AM572x Technical Reference Manual, SPRUHZ6H,
Revised November 2016 [1], shows recommended settings for the
SATA DPLL in Table 26-8. DPLL CLKDCOLDO Recommended Settings.

Use those settings in the driver. The TRM does not show
a value for 20MHz SYS_CLK so we use something close to the
26MHz setting.

[1] - http://www.ti.com/lit/ug/spruhz6h/spruhz6h.pdfSigned-off-by: Roger Quadros <rogerq@ti.com>
[nsekhar@ti.com: add exact TRM version to commit text]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Fixing the clk enable failure path in qcom_qmp_phy_init()
and cleanup the reset control deassertion failure path in
qcom_qmp_phy_com_init().

Fixes: e78f3d15 ("phy: qcom-qmp: new qmp phy driver for qcom-chipsets")

Cc: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Add definitions required to enable QMP phy support for IPQ8074.
Signed-off-by: smuthayy <smuthayy@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Presently, the phy pipe clock's name is assumed to be either
usb3_phy_pipe_clk_src or pcie_XX_pipe_clk_src (where XX is the
phy lane's number). However, this will not work if an SoC has
more than one instance of the phy. Hence, instead of assuming
the name of the clock, fetch it from the DT.
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

IPQ8074 uses QMP PHY controller that provides support to PCIe and
USB. Adding DT binding information for the same.
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

The PHY outputs a clock that will act as the parent for
the PHY's pipe clock. Add the name of this clock to the
lane's DT node.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

That quirk is required to make USB Ethernet gadget working on HW that
can't cope with unaligned DMA. For some reason only f_ncm sets up that
quirk, let's setup it directly in u_ether so other network models would
have that quirk applied as well. All network models have been tested with
ChipIdea UDC driver on NVIDIA Tegra20 SoC that require DMA to be aligned.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

When the gadget serial device has no associated TTY, do not pass any
received data into the TTY layer for processing; simply drop it instead.
This prevents the TTY layer from calling back into the gadget serial
driver, which will then crash in e.g. gs_write_room() due to lack of
gadget serial device to TTY association (i.e. a NULL pointer dereference).
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>