Enable "LPM Transaction Received" interrupt for receive an
interrupt when host will send LPM token.
Signed-off-by: NSevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Added function for supporting Active Clock Gating functionality
in the driver.

PCGCCTL1 (Power and Clock Control) register will be used
for controlling the core`s active clock gating feature, and
the previously reserved 12th bit in GHWCFG4 now indicates that the
controller supports the Dynamic Power Reduction (Active Clock Gating)
during no traffic scenarios such as L0, idle, resume and suspend
states.

dwc2_enable_acg() function sets GATEEN bit in PCGCCTL1 register
and enables ACG, if it supported.

According to ACG functional specification, enabling of ACG feature
in host mode done in host initialization, before turning Vbus on,
specifically in dwc2_core_host_init function.

Enabling of ACG feature in device mode done in device initialization,
before clearing the SftDiscon bit in DCTL.
This bit was cleared in dwc2_hsotg_core_connect() function.So
dwc2_enable_acg() called before dwc2_core_connect() calls.
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Renamed __orr32 and __bic32 function names to more descriptive
dwc2_set_bit and dwc2_clear_bit respectively.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Disabled only unmasked endpoints based on DAINTMSK register.
This will allow to minimize GINTSTS_GOUTNAKEFF interrupt handling.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In 'for' loop skipped masked and non-ISOC EPs. Also breaked 'for' loop
after setting SGOUTNAK in DCTL,when one enabled EP was detected.

This will allow to minimize incomplete ISOC OUT interrupt handling.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Disabled only that ISOC endpoints,for which interrupt bit was set
in the DAINTMSK register. This will allow to minimize incomplete
ISOC IN interrupt handling.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In dwc2_hsotg_core_init_disconnected() function used AHB burst size
parameter, instead of calculating already calculated value.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Move dwc2_hsotg_wait_bit_set function to core.c so it can be used
anywhere in the code.

Added dwc2_hsotg_wait_bit_clear function in core.c.

Replace all the parts of register bit polling code with
dwc2_hsotg_wait_bit_set or dwc2_hsotg_wait_bit_clear functions
calls depends on code logic.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NSevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

The irq is available in hsotg already, so there's no need to pass it as
separate function parameter.
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

We should call dwc2_hsotg_enqueue_setup() after properly
setting lx_state. Because it may cause error-out from
dwc2_hsotg_enqueue_setup() due to wrong value in lx_state.

Issue can be reproduced by loading driver while connected
A-Connector (start in A-HOST mode) then disconnect A-Connector
to switch to B-DEVICE.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

STSPHSERCVD (status phase received) interrupt should be
handled when EP0 is in DWC2_EP0_DATA_OUT state.

Sometimes STSPHSERCVD interrupt asserted , when EP0
is not in DATA_OUT state. Spurios interrupt.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In some cases device sending ZLP IN on non EP0 which
reassigning EP0 OUT descriptor pointer to that EP.
Dedicated for EP0 OUT descriptor multiple time re-used by
other EP while that descriptor already in use by EP0 OUT
for SETUP transaction. As result when SETUP packet received
BNA interrupt asserting.

In dwc2_hsotg_program_zlp() function dwc2_gadget_set_ep0_desc_chain()
must be called only for EP0.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In host mode reading from DPTXSIZn returning invalid value in
dwc2_check_param_tx_fifo_sizes function.

In total TxFIFO size calculations unnecessarily reducing by ep_info.
hw->total_fifo_size can be fully allocated for FIFO's.

Added num_dev_in_eps member in dwc2_hw_params structure to save number
of IN EPs.

Added g_tx_fifo_size array in dwc2_hw_params structure to store power
on reset values of DPTXSIZn registers in forced device mode.

Updated dwc2_hsotg_tx_fifo_count() function to get TxFIFO count from
num_dev_in_eps.

Updated dwc2_get_dev_hwparams() function to store DPTXFSIZn in
g_tx_fifo_size array.

dwc2_get_host/dev_hwparams() functions call moved after num_dev_in_eps
set from hwcfg4.

Modified dwc2_check_param_tx_fifo_sizes() function to check TxFIFOn
sizes based on g_tx_fifo_size array.

Removed ep_info subtraction during calculation of tx_addr_max in
dwc2_hsotg_tx_fifo_total_depth() function. Also removed
dwc2_hsotg_ep_info_size() function as no more need.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NGevorg Sahakyan <sahakyan@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: John Youn <johnyoun@synopsys.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NFelipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: NJohan Hovold <johan@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

It has been noticed that the dwc2 udc state reporting doesn't
seem to work (at least on HiKey boards). Where after the initial
setup, the sysfs /sys/class/udc/f72c0000.usb/state file would
report "configured" no matter the state of the OTG port.

This patch adds a call so that we report to the UDC layer when
the gadget device is disconnected.

This patch does depend on the previous patch ("usb: dwc2:
Improve gadget state disconnection handling") in this patch set
in order to properly work.

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: YongQin Liu <yongqin.liu@linaro.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Acked-by: NMinas Harutyunyan <hminas@synopsys.com>
Tested-by: NMinas Harutyunyan <hminas@synopsys.com>
Reported-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

We've found that while in host mode, using Android, if one runs
the command:
  stop adbd

The existing usb devices being utilized in host mode are disconnected.
This is most visible with usb networking devices.

This seems to be due to adbd closing the file:
  /dev/usb-ffs/adb/ep0
Which calls ffs_ep0_release() and the following backtrace:

[<ffffff800875a430>] dwc2_hsotg_ep_disable+0x148/0x150
[<ffffff800875a498>] dwc2_hsotg_udc_stop+0x60/0x110
[<ffffff8008787950>] usb_gadget_remove_driver+0x58/0x78
[<ffffff80087879e4>] usb_gadget_unregister_driver+0x74/0xe8
[<ffffff80087850c0>] unregister_gadget+0x28/0x58
[<ffffff800878511c>] unregister_gadget_item+0x2c/0x40
[<ffffff8008790ea8>] ffs_data_clear+0xe8/0xf8
[<ffffff8008790ed8>] ffs_data_reset+0x20/0x58
[<ffffff8008793218>] ffs_data_closed+0x98/0xe8
[<ffffff80087932d8>] ffs_ep0_release+0x20/0x30

Then when dwc2_hsotg_ep_disable() is called, we call
kill_all_requests() which causes a bunch of the following
messages:

dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode
init: Service 'adbd' (pid 1915) killed by signal 9
init: Sending signal 9 to service 'adbd' (pid 1915) process group...
init: Successfully killed process cgroup uid 0 pid 1915 in 0ms
init: processing action (init.svc.adbd=stopped) from (/init.usb.configfs.rc:15)
dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 8 - ChHltd set, but reason is unknown
dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029
dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 12 - ChHltd set, but reason is unknown
dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029
dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 15 - ChHltd set, but reason is unknown
dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029
dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 3 - ChHltd set, but reason is unknown
dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029
dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 4 - ChHltd set, but reason is unknown
dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029
dwc2 f72c0000.usb: dwc2_update_urb_state_abn(): trimming xfer length

And the usb devices connected are basically hung at this point.

It seems like if we're in host mode, we probably shouldn't run
the dwc2_hostg_ep_disable logic, so this patch returns an error
in that case.

With this patch (along with the previous patch in this set), we avoid
the mismatched interrupts and connected usb devices continue to function.

I'm not sure if some other solution would be better here, but this seems
to work, so I wanted to send it out for input on what the right approach
should be.

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: YongQin Liu <yongqin.liu@linaro.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Acked-by: NMinas Harutyunyan <hminas@synopsys.com>
Tested-by: NMinas Harutyunyan <hminas@synopsys.com>
Reported-by: NYongQin Liu <yongqin.liu@linaro.org>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Make the structure const as it is only stored in the ops field of a
usb_ep structure, which is of type const.
Done using Coccinelle.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Reseted DEVADDR field in DCFG to zero on USB RESET.

Device address in DCFG register does not reset to zero,
which required to pass enumeration, after disconnect and
reconnect.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Remove legacy DWC2_G_P_LEGACY_TX_FIFO_SIZE array for TX FIFOs.
Update dwc2_set_param_tx_fifo_sizes function to calculate
and assign default average FIFO depth to each member of
g_tx_fifo_size array. Total FIFO size, EP Info block's size,
FIFO operation mode and device operation mode are taken into
consideration during the calculation.

Cc: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NSevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Basically when plugging in various cables in different orders, I'm
occasionally seeing the following BUG splat:

[   86.215403] BUG: scheduling while atomic: kworker/u16:2/53/0x00000002
[   86.219164] usb 1-1: USB disconnect, device number 9
[   86.226845] Preemption disabled at:[   86.230218]
[<ffffff8008673558>] dwc2_conn_id_status_change+0x120/0x250
[   86.236894] CPU: 0 PID: 53 Comm: kworker/u16:2 Tainted: G        W
     4.9.0-rc8-00051-gd5a7979-dirty #1702
[   86.246836] Hardware name: HiKey Development Board (DT)
[   86.252100] Workqueue: dwc2 dwc2_conn_id_status_change
[   86.257279] Call trace:
[   86.259771] [<ffffff8008087c28>] dump_backtrace+0x0/0x1a0
[   86.265210] [<ffffff8008087ddc>] show_stack+0x14/0x20
[   86.270308] [<ffffff80084343f0>] dump_stack+0x90/0xb0
[   86.275401] [<ffffff80080d8d94>] __schedule_bug+0x6c/0xb8
[   86.280841] [<ffffff8008a07220>] __schedule+0x4f8/0x5b0
[   86.286099] [<ffffff8008a073e8>] schedule+0x38/0xa0
[   86.291017] [<ffffff8008a0a6cc>] schedule_hrtimeout_range_clock+0x8c/0xf0
[   86.297846] [<ffffff8008a0a740>] schedule_hrtimeout_range+0x10/0x18
[   86.304150] [<ffffff8008a0a4a0>] usleep_range+0x50/0x58
[   86.309418] [<ffffff800866d8dc>] dwc2_wait_for_mode.isra.4+0x54/0xd0
[   86.315815] [<ffffff800866f058>] dwc2_core_reset+0xe0/0x168
[   86.321431] [<ffffff800867e364>] dwc2_hsotg_core_init_disconnected+0x2c/0x310
[   86.328602] [<ffffff8008673568>] dwc2_conn_id_status_change+0x130/0x250
[   86.335254] [<ffffff80080ccd48>] process_one_work+0x118/0x370
[   86.341035] [<ffffff80080ccfe8>] worker_thread+0x48/0x498
[   86.346473] [<ffffff80080d2eb0>] kthread+0xd0/0xe8
[   86.351299] [<ffffff8008082e80>] ret_from_fork+0x10/0x50

This seems to be caused by the dwc2_wait_for_mode() calling
usleep_range() while the hstog->lock spinlock is held, since
we take that before calling dwc2_hsotg_core_init_disconnected().

This patch avoids the issue by adding an extra argument to
dwc2_core_reset(), as suggested by John Youn, which allows us to
skip the waiting, which should be unnecessary when calling from
dwc2_hsotg_core_init_disconnected().

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Check these parameters only for true or false. There is no need to check
for greater or less than 0.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Add programming of GDFIFOCFG register in device mode.
It must contain start address for EP Info block and
total FIFO depth.
Signed-off-by: NSevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Take the sizeof '*req' instead of 'struct dwc2_hsotg_req'.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

The indent should be only one tab.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Fix lines over 80 characters.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

* Remove braces for one-line statements
* Add missing braces where another arm in if-statement uses braces
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Fix misaligned and over 80-character comments.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

This commmit is the result of running checkpatch --fix.

The results were verified for correctness. Some of the fixes result in
line over 80 char which we will fix manually later.

The following is a summary of what was done by checkpatch:
* Remove externs on function prototypes.
* Replace symbolic permissions with octal.
* Align code to open parens.
* Replace 'unsigned' with 'unsigned int'.
* Remove unneccessary blank lines.
* Add blank lines after declarations.
* Add spaces around operators.
* Remove unnecessary spaces after casts.
* Replace 'x == NULL' with '!x'.
* Replace kzalloc() with kcalloc().
* Concatenate multi-line strings.
* Use the BIT() macro.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

USBTrdTim must be programmed to 0x5 when phy has a UTMI+ 16-bit wide
interface or 0x9 when it has a 8-bit wide interface.
GUSBCFG reset value (Value After Reset: 0x1400) sets USBTrdTim to 0x5.
In case of 8-bit UTMI+, without clearing GUSBCFG.USBTRDTIM mask, USBTrdTim
results in 0xD (0x5 | 0x9).
That's why we need to clear GUSBCFG.USBTRDTIM mask before setting USBTrdTim
value, to ensure USBTrdTim is correctly set in case of 8-bit UTMI+.
Signed-off-by: NAmelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Remove DMA memory free from EP disable flow by replacing
dma_alloc_coherent with dmam_alloc_coherent.
Tested-by: NJohn Stultz <john.stultz@linaro.org>
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>

dwc2_hsotg_ep_enable can be called from interrupt context, so all
allocations should be done with GFP_ATOMIC flags. This fixes following
issue on ARM architecture:

[<c010d830>] (unwind_backtrace) from [<c010a51c>] (show_stack+0x10/0x14)
[<c010a51c>] (show_stack) from [<c032930c>] (dump_stack+0x74/0x94)
[<c032930c>] (dump_stack) from [<c011cd30>] (__warn+0xd4/0x100)
[<c011cd30>] (__warn) from [<c011cd7c>] (warn_slowpath_null+0x20/0x28)
[<c011cd7c>] (warn_slowpath_null) from [<c0187e04>] (smp_call_function_many+0xcc/0x2a4)
[<c0187e04>] (smp_call_function_many) from [<c0188014>] (on_each_cpu_mask+0x38/0xa8)
[<c0188014>] (on_each_cpu_mask) from [<c01ddfe0>] (start_isolate_page_range+0x134/0x1b8)
[<c01ddfe0>] (start_isolate_page_range) from [<c01a3c14>] (alloc_contig_range+0xac/0x2f8)
[<c01a3c14>] (alloc_contig_range) from [<c01de3e4>] (cma_alloc+0xe0/0x1a8)
[<c01de3e4>] (cma_alloc) from [<c0110acc>] (__alloc_from_contiguous+0x38/0xe0)
[<c0110acc>] (__alloc_from_contiguous) from [<c0110ba4>] (cma_allocator_alloc+0x30/0x38)
[<c0110ba4>] (cma_allocator_alloc) from [<c0111034>] (__dma_alloc+0x1c0/0x2c8)
[<c0111034>] (__dma_alloc) from [<c01111b4>] (arm_dma_alloc+0x3c/0x48)
[<c01111b4>] (arm_dma_alloc) from [<c04ad800>] (dwc2_hsotg_ep_enable+0xec/0x46c)
[<c04ad800>] (dwc2_hsotg_ep_enable) from [<c04da610>] (usb_ep_enable+0x2c/0x3c)
[<c04da610>] (usb_ep_enable) from [<c04dc0c0>] (ecm_set_alt+0xa8/0x154)
[<c04dc0c0>] (ecm_set_alt) from [<c04d678c>] (composite_setup+0xd74/0x1540)
[<c04d678c>] (composite_setup) from [<c04ae048>] (dwc2_hsotg_complete_setup+0xb8/0x370)
[<c04ae048>] (dwc2_hsotg_complete_setup) from [<c04d987c>] (usb_gadget_giveback_request+0xc/0x10)
[<c04d987c>] (usb_gadget_giveback_request) from [<c04acafc>] (dwc2_hsotg_complete_request+0x78/0x128)
[<c04acafc>] (dwc2_hsotg_complete_request) from [<c04aed28>] (dwc2_hsotg_epint+0x69c/0x81c)
[<c04aed28>] (dwc2_hsotg_epint) from [<c04af6c4>] (dwc2_hsotg_irq+0xfc/0x748)
[<c04af6c4>] (dwc2_hsotg_irq) from [<c0163264>] (__handle_irq_event_percpu+0x58/0x140)
[<c0163264>] (__handle_irq_event_percpu) from [<c0163368>] (handle_irq_event_percpu+0x1c/0x58)
[<c0163368>] (handle_irq_event_percpu) from [<c01633dc>] (handle_irq_event+0x38/0x5c)
[<c01633dc>] (handle_irq_event) from [<c01666e4>] (handle_fasteoi_irq+0xc4/0x19c)
[<c01666e4>] (handle_fasteoi_irq) from [<c0162a2c>] (generic_handle_irq+0x18/0x28)
[<c0162a2c>] (generic_handle_irq) from [<c0162b40>] (__handle_domain_irq+0x6c/0xe4)
[<c0162b40>] (__handle_domain_irq) from [<c0101470>] (gic_handle_irq+0x50/0x9c)
[<c0101470>] (gic_handle_irq) from [<c010b00c>] (__irq_svc+0x6c/0xa8)

Fixes: 5f54c54b ("usb: dwc2: gadget: Add DDMA chain pointers to
	dwc2_hsotg_ep structure")
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Remove request length checking from dwc2_hsotg_unmap_dma() and
dwc2_hsotg_map_dma(). That checking is done in functions called from
those functions, usb_gadget_unmap_request_by_dev() and
usb_gadget_map_request_by_dev() respectively, so it's unnecessary.
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

While sending zlp for DWC2_EP0_STATUS_IN EP direction was changed to IN.
Change it back to complete OUT transfer request.

This affects only on DMA mode, because DMA buffer map/unmap function is
direction sensitive.
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Check the request length in dwc2_hsotg_start_req() function. If
length == 0, do not write DMA address to control register.
Signed-off-by: NRazmik Karapetyan <razmik@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Added new core param for low speed, which can be used only when SNPSID
is equal to DWC2_CORE_FS_IOT. When LS mode is enabled, we are
restricting ep types and providing to upper layer only INTR and CTRL
endpoints.
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>

When device is enumerated in LS we should program ep0_mps accordingly.
USB2 spec says that in LS mode, control ep mps must be 8.
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>

Do modifications in dwc2_hsotg_core_init_disconnected() function to
enable USB 1.1 Full-Speed Serial Transceiver Select in GUSBCFG register
if corresponding speed and PHY types are chosen. Adjust device speed
selection in DCFG register as well.
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>

Check if endpoint is enabled during dwc2_hsotg_ep_disable() function
processing and call dwc2_hsotg_ep_stop_xfr() to disable it and flush
associated FIFO.

Move dwc2_hsotg_ep_stop_xfr() and dwc2_hsotg_wait_bit_set() functions
upper before dwc2_hsotg_ep_enable and dwc2_hsotg_ep_disable function
definitions.
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>

Correct dwc2_hsotg_ep_stop_xfr() function to follow dwc2 programming
guide for setting NAK on specific endpoint, disabling it and flushing
corresponding FIFO.

Current code does not take into account whether core acts in shared or
dedicated FIFO mode, current endpoint is periodic or not. It does not
clear EPDISBLD interrupt after programming of DXEPCTL_EPDIS, does not
flush shared TX FIFO and tries to clear global out NAK in wrong manner
instead of setting DCTL_CGOUTNAK.
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>