Since we handle FIFOs and endpoint separately, using variable named 'ep'
in context of FIFO is misleading, hence we rename it to 'fifo'.
Signed-off-by: NRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

According to DWC2 documentation, DPTxFSize field of DPTXFSIZn register
is read only, which means that software cannot change FIFO size.

Register description says:
"The value of this register is the Largest Device Mode Periodic Tx Data
FIFO Depth (parameter OTG_TX_DPERIO_DFIFO_DEPTH_n), as specified during
coreConsultant configuration."

That means, that we have to setup only FIFO start addresses (DPTxFStAddr),
taking into account reset values of DPTxFSize.

Initialize FIFO start addresses properly and remove unneeded core related
to incorrect FIFO size initialization.
Signed-off-by: NRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In context of FIFO registers we use ep->fifo_index instead of ep->index.
Signed-off-by: NRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

All kmalloc-based functions print enough information on failures.
Signed-off-by: NWolfram Sang <wsa-dev@sang-engineering.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Done fixes and tested hsotg gadget's BDMA mode. Tested Control,
Bulk, Isoc, Inter transfers. Added code for isoc transfers,
removed unusable code, done minor fixes. Affected functions
and IRQ handlers:
- dwc2_hsotg_start_req(),
- dwc2_hsotg_ep_enable(),
- dwc2_hsotg_ep_queue(),
- dwc2_hsotg_handle_outdone(),
- GINTSTS_GOUTNAKEFF handler,

Removed 'has_correct_parity' flag from 'dwc2_hsotg_ep' struct.
Before this patch series, to set the data pid the DWC2 gadget
driver was toggling the even/odd until it match, then were
leaving it set. But now I have added mechanism to set pid and
excluded all code where this flag was set.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Reimplemented EP disabled interrupt handler and moved to
corresponding function.

This interrupt indicates that the endpoint has been disabled per
the application's request.

For IN endpoints flushes txfifo, in case of BULK clears DCTL_CGNPINNAK,
in case of ISOC completes current request.

For ISOC-OUT endpoints completes expired requests. If there is
remaining request starts it. This is the part of ISOC-OUT transfer
drop flow. When ISOC-OUT transfer expired we must disable ep to drop
ongoing transfer.
Tested-by: NJohn Keeping <john@metanate.com>
Reviewed-by: NVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Incomplete ISO IN interrupt indicates one of the following conditions
occurred while transmitting an ISOC transaction.
- Corrupted IN Token for ISOC EP.
- Packet not complete in FIFO.

Incomplete ISO OUT indicates that there is at least one isochronous OUT
endpoint on which the transfer is not completed in the current
microframe.

The following actions will be taken:

In case of EP-IN
- Determine the EP
- Disable EP directly from this handler; when "Endpoint Disabled"
  interrupt is received flush FIFO

In case of EP-OUT
- Determine the EP
- If target frame elapsed set DCTL_SGOUTNAK, unmask GOUTNAKEFF and
  proceed as described in section 7.5.1 of DWC-HSOTG Programming Guide

Also added dwc2_gadget_target_frame_elapsed() helper function which
will be used in Incomplete ISO IN/OUT Interrupt handlers.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

NAKINTRPT interrupt is starting point for isoc-in transfer,
synchronization done with first in token received from host,
core asserts this interrupt when responds with 0 length data
to in token, received from host.

The first IN token is asynchronous for device - device does not
know when first one token will arrive from host. On first token
arrival HW generates 2 interrupts: 'in token received while FIFO
empty' and 'NAK'. NAK interrupt for ISOC in means that token has
arrived and ZLP was sent in response to that as there was no data
in FIFO. SW is basing on this interrupt to obtain frame in which
token has come and then based on the interval calculates next
frame for transfer.

OUTTKNEPDIS interrupt is starting point for isoc-out transfer,
synchronization done with first out token received from host
while corresponding ep is disabled.

For OUTs the reason is same - device does not know initial frame
in which out token will come. For this HW generates OUTTKNEPDIS
- out token is received while EP is disabled. Upon getting this
interrupt SW starts calculation for next transfer frame.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Replaced repeating code with function call.

Starts next request from ep queue.
If queue is empty and ep is isoc
-In case of OUT-EP unmasks OUTTKNEPDIS.

OUTTKNEPDIS is masked in it's handler, so we need to unmask it here
to be able to do resynchronization.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Reads and returns interrupts for given endpoint, by masking epint_reg
with corresponding mask.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Calculate the interval according to the USB 2.0 specification section
9.6.6.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Increases and checks targeted frame number of current ep
if overrun happened, sets flag and masks with DSTS_SOFFN_LIMIT

Added following fields to struct dwc2_hsotg_ep
-target_frame: Targeted frame num to setup next ISOC transfer
-frame_overrun: Indicates SOF number overrun in DSTS
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

According DWC-OTG databook, "GOUTNakEff" is read only and can be
cleared only by "DCTL.CGOUTNak", but here we do not need to clear
it because DWC-OTG programming guide says that before disabling
any OUT endpoint, the application must enable Global OUT NAK mode,
so if this mode is enabled we can continue without this step.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

No-op change. Changed field names to prevent misunderstanding.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

This chunk is not needed here. There is no functionality
depend on this, so if no-op, I think we do not need to have
this interrupt unmasked.
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Removed "ctrl |= DXEPCTL_USBACTEP" from
dwc2_hsotg_start_req() function because this
step is done in dwc2_hsotg_ep_enable().
Tested-by: NJohn Keeping <john@metanate.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Add a check in dwc2_hsotg_ep_sethalt() so that it does not halt
isochronous endpoints.
Signed-off-by: NVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

The gadget API function usb_ep_set_halt() expects the gadget to return
-EAGAIN if the ep is active. Add support for this behavior.

Otherwise this may break mass storage protocol if a STALL is attempted
on the endpoint.
Signed-off-by: NVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In host slave mode, the core asserts the rxready, txfifoempty interrupts
that get serviced in the gadget irq handler. Prevent servicing of these
when not in the gadget mode of operation.
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Replaced the WARN_ON with a check and return of -EINVAL in the
dwc2_hsotg_ep_enable function if ep0 is passed in.
Signed-off-by: NVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

The host/device mode set with dr_mode should be kept all the time,
not being changed to OTG in gadget setup (by overriding CFGUSB_FORCEDEVMODE
and CFGUSB_FORCEHOSTMODE bits).
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NPrzemek Rudy <prudy1@o2.pl>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Move the register save and restore functions into the host and gadget
specific files.
Tested-by: NDouglas Anderson <dianders@chromium.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@kernel.org>

The "enumspd" field is located in register DSTS[2:1], but the code
which checks the bitfield does not shift the value accordingly. This
in turn causes incorrect detection of gadget link partner speed in
dwc2_hsotg_irq_enumdone() .

Shift the value accordingly to fix the problem with speed detection.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: John Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Remove call to dwc2_hsotg_init() from dwc2_gadget_init(). The
gadget_init function should not access any device registers because the
mode isn't guaranteed here.

Also, this is already called elsewhere before anything starts on the
gadget so it is not necessary here.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The dwc2_core_reset() function exists in the core so use that one
instead.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Use the previously cached hw params in the gadget. This saves a reset
and force mode in the gadget initialization during probe and makes
getting the hardware parameters consistent between gadget and host.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When receiving GINTSTS_GINNAKEFF or GINTSTS_GOUTNAKEFF interrupt,
DCTL will be overwritten with DCTL_CGOUTNAK or DCTL_CGNPINNAK values.
Instead of overwriting it, write only needed bits.

It could cause an issue if GINTSTS_GINNAKEFF or GINTSTS_GOUTNAKEFF
interrupt is received after dwc2 disabled pullup by writing
DCTL_SFTDISCON bit.
Pullup will then be re-enabled whereas it should not.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

To stop an out endpoint, software should set sets the Global OUT NAK,
but not the Global Non-periodic IN NAK. This driver bug leads the out-ep
failed be in disabled state with below error.

dwc2_hsotg_ep_stop_xfr: timeout DOEPCTL.EPDisable
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NDu, Changbin <changbin.du@intel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

DWC2 module on some platforms needs three additional hardware
resources: phy controller, clock and power supply. All of them must be
enabled/activated to properly initialize and operate. This was initially
handled in s3c-hsotg driver, which has been converted to 'gadget' part
of dwc2 driver. Unfortunately, not all of this code got moved to common
platform code, what resulted in accessing DWC2 registers without
enabling low-level hardware resources. This fails for example on Exynos
SoCs. This patch moves all the code for managing those resources to
common platform.c file and provides convenient wrappers for controlling
them.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

init_mutex is a leftover from the time, when s3c-hsotg driver did not
implement proper pull up/down control and emulated it by enabling
enabling/disabling usb phy. Proper pull up/down control has been added
by commit 5b9451f8 ("usb: dwc2: gadget:
use soft-disconnect udc feature in pullup() method"), so init_muxtex can
be removed now to avoid potential deadlocks with other locks.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

USB OTG driver in isochronous mode has to set the parity of the receiving
microframe. The parity is set to even by default. This causes problems for
an audio gadget, if the host starts transmitting on odd microframes.

This fix uses Incomplete Periodic Transfer interrupt to toggle between
even and odd parity until the Transfer Complete interrupt is received.
Signed-off-by: NRoman Bacik <rbacik@broadcom.com>
Reviewed-by: NAbhinav Ratna <aratna@broadcom.com>
Reviewed-by: NSrinath Mannam <srinath.mannam@broadcom.com>
Signed-off-by: NScott Branden <sbranden@broadcom.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

During typical gadget operation, dwc2 clock was enabled 3 times: from
dwc2_gadget_init(), dwc2_hsotg_udc_start() and dwc2_hsotg_pullup(), and
then disabled in s3c_hsotg_pullup(), s3c_hsotg_udc_stop() and
dwc2_hsotg_remove(). This really makes no sense, so leave clock control
code only in dwc2_gadget_init/remove functions.
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch removes doubled call to dwc2_hsotg_of_probe() function.
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When dwc2_hsotg_handle_unaligned_buf_complete() hs_req->req.buf
already destroyed, in dwc2_hsotg_unmap_dma(), it touches
hs_req->req.dma again, so dwc2_hsotg_unmap_dma() should be called
before dwc2_hsotg_handle_unaligned_buf_complete(). Otherwise, it
will cause a bad_page BUG, when allocate this memory page next
time.

This bug led to the following crash:

BUG: Bad page state in process swapper/0  pfn:2bdbc
[   26.820440] page:eed76780 count:0 mapcount:0 mapping:  (null) index:0x0
[   26.854710] page flags: 0x200(arch_1)
[   26.885836] page dumped because: PAGE_FLAGS_CHECK_AT_PREP flag set
[   26.919179] bad because of flags:
[   26.948917] page flags: 0x200(arch_1)
[   26.979100] Modules linked in:
[   27.008401] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W3.14.0 #17
[   27.041816] [<c010e1f8>] (unwind_backtrace) from [<c010a704>] (show_stack+0x20/0x24)
[   27.076108] [<c010a704>] (show_stack) from [<c087eea8>] (dump_stack+0x70/0x8c)
[   27.110246] [<c087eea8>] (dump_stack) from [<c01ce0b8>] (bad_page+0xfc/0x12c)
[   27.143958] [<c01ce0b8>] (bad_page) from [<c01ce65c>] (get_page_from_freelist+0x3e4/0x50c)
[   27.179298] [<c01ce65c>] (get_page_from_freelist) from [<c01ce9a0>] (__alloc_pages_nodemask)
[   27.216296] [<c01ce9a0>] (__alloc_pages_nodemask) from [<c01cf00c>] (__get_free_pages+0x20/)
[   27.252326] [<c01cf00c>] (__get_free_pages) from [<c01e5bec>] (kmalloc_order_trace+0x34/0xa)
[   27.288295] [<c01e5bec>] (kmalloc_order_trace) from [<c0203304>] (__kmalloc+0x40/0x1ac)
[   27.323751] [<c0203304>] (__kmalloc) from [<c052abc0>] (dwc2_hsotg_ep_queue.isra.12+0x7c/0x1)
[   27.359937] [<c052abc0>] (dwc2_hsotg_ep_queue.isra.12) from [<c052af88>] (dwc2_hsotg_ep_queue)
[   27.397478] [<c052af88>] (dwc2_hsotg_ep_queue_lock) from [<c0554110>] (rx_submit+0xfc/0x164)
[   27.433619] [<c0554110>] (rx_submit) from [<c05546e8>] (rx_complete+0x22c/0x230)
[   27.468872] [<c05546e8>] (rx_complete) from [<c052b528>] (dwc2_hsotg_complete_request+0xfc/0)
[   27.506240] [<c052b528>] (dwc2_hsotg_complete_request) from [<c052bba0>] (dwc2_hsotg_handle_o)
[   27.545401] [<c052bba0>] (dwc2_hsotg_handle_outdone) from [<c052be70>] (dwc2_hsotg_epint+0x2c)
[   27.583689] [<c052be70>] (dwc2_hsotg_epint) from [<c052c750>] (dwc2_hsotg_irq+0x1dc/0x4ac)
[   27.621041] [<c052c750>] (dwc2_hsotg_irq) from [<c01682e0>] (handle_irq_event_percpu+0x70/0x)
[   27.659066] [<c01682e0>] (handle_irq_event_percpu) from [<c01684ec>] (handle_irq_event+0x4c)
[   27.697322] [<c01684ec>] (handle_irq_event) from [<c016bae0>] (handle_fasteoi_irq+0xc8/0x11)
[   27.735451] [<c016bae0>] (handle_fasteoi_irq) from [<c0167b8c>] (generic_handle_irq+0x30/0x)
[   27.773918] [<c0167b8c>] (generic_handle_irq) from [<c0167ca4>] (__handle_domain_irq+0x84/0)
[   27.812018] [<c0167ca4>] (__handle_domain_irq) from [<c01003b0>] (gic_handle_irq+0x48/0x6c)
[   27.849695] [<c01003b0>] (gic_handle_irq) from [<c010b340>] (__irq_svc+0x40/0x50)
[   27.886907] Exception stack(0xc0d01ee0 to 0xc0d01f28)
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Tested-by: NHeiko Stuebner <heiko@sntech.de>
Tested-by: NJeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: NYunzhi Li <lyz@rock-chips.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If system is loaded, reset, enum-done and setup interrupts can occur
at the same time. Current interrupt handling sequence will handle
setup packet's interrupt before handling reset interrupt. Which will
break the enumeration process. Correct sequence is to handle reset,
enum-done and then any other endpoint interrupts.
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When disconnecting cable, controller will detect a suspend condition
and enter partial power down. If vbus_session is called by the phy
driver during hibernation, make sure controller exit hibernation
before it is accessed.
Signed-off-by: NJianqiang Tang <jianqiang.tang@intel.com>
Signed-off-by: NGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

idstschng interrupt should not be used when id pin control is
external. This is already handled on dwc2 host part. Fix it on gadget
part as well.
Signed-off-by: NGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

There is a 200ms guard period to avoid unnecessary resets of the dwc2
ip. This delay sometimes prove to be too large when usbcv is run with
an ehci host. dwc2 only needs to be reset after addressed state.
Change the logic to reset ip after addressed state.
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Make sure there are no requests pending on ep0 before reinitializing
core. Otherwise, dwc2_hsotg_enqueue_setup will fail afterwards.

Also, take hsotg->lock before calling
dwc2_hsotg_core_init_disconnected() from dwc2_conn_id_status_change()
as dwc2_hsotg_complete_request() expect lock to be held.
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If the request being dequeued is already started, disable endpoint
to stop the transfer and then call dwc2_hsotg_complete_request().
Endpoint will be re-enabled on next call to dwc2_hsotg_start_req().
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>