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Some gadget drivers don't implement suspend and/or resume functions.
Instead of changing the gadget drivers, make suspend and resume in
ci13xxx_udc (following other udc drivers) optional.
Tested-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
* 'for-next/musb' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb:
usb: musb: omap2430: fix compile warning
usb: musb: fix pm_runtime calls while atomic
usb: musb: drop ARCH dependency
usb: musb: headers cleanup
usb: musb: allow building USB_MUSB_TUSB6010 as a module
usb: musb: use a Kconfig choice to pick the right DMA method
usb: musb: omap2+: save and restore OTG_INTERFSEL
usb: musb: omap2+: fix context api's
usb: musb: ux500: optimize DMA callback routine
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fix the following compile warning:
drivers/usb/musb/omap2430.c: In function 'musb_otg_notifier_work':
drivers/usb/musb/omap2430.c:279:3: warning: 'return' with a value, in
function returning void
drivers/usb/musb/omap2430.c:282:2: warning: 'return' with a value, in
function returning void
Signed-off-by: Felipe Balbi <balbi@ti.com>
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musb pm_runtime_get_sync call happens in intrrupt context on cable attach case
That can result in re-enabling the interrupts and cause side affects.
So move the code to a work queue.
Following is the error path hit on cable attach:
BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:802
in_atomic(): 0, irqs_disabled(): 0, pid: 18, name: irq/378-twl6030
Backtrace:
[<c00520f0>] (dump_backtrace+0x0/0x110) from [<c054f454>] (dump_stack+0x18/0x1c)
[<c054f43c>] (dump_stack+0x0/0x1c) from [<c007f59c>] (__might_sleep+0x130/0x134)
[<c007f46c>] (__might_sleep+0x0/0x134) from [<c02c2794>] (__pm_runtime_resume+0x94/0x98)
[<c02c2700>] (__pm_runtime_resume+0x0/0x98) from [<c033e7e4>] (musb_otg_notifications+0x9c/0x164)
[<c033e748>] (musb_otg_notifications+0x0/0x164) from [<c00b3df0>] (notifier_call_chain+0x4c/0x8c)
[<c00b3da4>] (notifier_call_chain+0x0/0x8c) from [<c00b44a8>] (__atomic_notifier_call_chain+0x40/0x54)
[<c00b4468>] (__atomic_notifier_call_chain+0x0/0x54) from [<c00b44dc>] (atomic_notifier_call_chain+0x20/0x28)
[<c00b44bc>] (atomic_notifier_call_chain+0x0/0x28) from [<c033f124>] (twl6030_usb_irq+0xc8/0xdc)
[<c033f05c>] (twl6030_usb_irq+0x0/0xdc) from [<c00d79f8>] (irq_thread_fn+0x24/0x40)
[<c00d79d4>] (irq_thread_fn+0x0/0x40) from [<c00d7b64>] (irq_thread+0x150/0x1d8)
[<c00d7a14>] (irq_thread+0x0/0x1d8) from [<c00adf70>] (kthread+0x94/0x98)
[<c00adedc>] (kthread+0x0/0x98) from [<c0094388>] (do_exit+0x0/0x720)
Tested with:
MUSB Device mode: Cold boot / Hot plug
MUSB Host mode: Cold boot / Hot plug
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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musb core driver and tusb6010 glue layer don't
depend on anything which is ARCH-specific. It
builds fine on x86 and ARM. Dropping the dependency
so we can compile-test on linux-next.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Remove a few unnecessary headers from a
few files.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Commit 1376d92f9 "usb: musb: allow musb and glue layers to be modules"
made the USB_MUSB_TUSB6010 option modular, but actually building
the driver as a module does not work, so various randconfig builds
actually fail. This changes all code that depends on the
option to also check for modular builds, and exports the necessary
symbols.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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The logic to allow only one DMA driver in MUSB is currently
flawed, because it also allows picking no DMA driver at all
and also not selecting PIO mode.
Using a choice statement makes this foolproof for now and
also simplifies the Makefile.
Unfortunately, we will have to revisit this when we start
supporting multiple ARM platforms in a single kernel binary,
because at that point we will actually need to select
multiple DMA drivers and pick the right one at run-time.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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we need to save and restore OTG_INTERFSEL register
else we will be unable to function on resume after
OFF mode.
Reported-by: Devaraj Rangasamy <dev@ti.com>
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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RxFifoSz, TxFifoSz, RxFifoAddr, TxFifoAddr
are all indexed registers.
So before doing a context save or restore, INDEX register
should be set, then only one gets to the right register offset.
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Skip the use of work queue and call musb_dma_completion() directly from
DMA callback context.
Here follows measurements on a Snowball board with ondemand governor active.
Performance using work queue:
(105 MB) copied, 6.23758 s, 16.8 MB/s
(105 MB) copied, 5.7151 s, 18.3 MB/s
(105 MB) copied, 5.83583 s, 18.0 MB/s
(105 MB) copied, 5.93611 s, 17.7 MB/s
Performance without work queue
(105 MB) copied, 5.62173 s, 18.7 MB/s
(105 MB) copied, 5.61811 s, 18.7 MB/s
(105 MB) copied, 5.57817 s, 18.8 MB/s
(105 MB) copied, 5.58549 s, 18.8 MB/s
Signed-off-by: Per Forlin <per.forlin@linaro.org>
Acked-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
* 'for-next/dwc3' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (392 commits)
usb: dwc3: ep0: fix for possible early delayed_status
usb: dwc3: gadget: fix stream enable bit
usb: dwc3: ep0: fix GetStatus handling (again)
usb: dwc3: ep0: use dwc3_request for ep0 requsts instead of usb_request
usb: dwc3: use correct hwparam register for power mgm check
usb: dwc3: omap: move to module_platform_driver
usb: dwc3: workaround: missing disconnect event
usb: dwc3: workaround: missing USB3 Reset event
usb: dwc3: workaround: U1/U2 -> U0 transiton
usb: dwc3: gadget: return early in dwc3_cleanup_done_reqs()
usb: dwc3: ep0: handle delayed_status again
usb: dwc3: ep0: push ep0state into xfernotready processing
usb: dwc3: fix sparse errors
usb: dwc3: fix few coding style problems
usb: dwc3: move generic dwc3 code from gadget into core
usb: dwc3: use a helper function for operation mode setting
usb: dwc3: ep0: don't use ep0in for transfers
usb: dwc3: ep0: use proper endianess in SetFeature for wIndex
usb: dwc3: core: drop DWC3_EVENT_BUFFERS_MAX
usb: dwc3: omap: add multiple instances support to OMAP
...
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There is a very small possibility (previously unimagined
by us) that the whole Mass Storage delayed status happens
rather early, before we even get our XferNotReady event.
In that case, we will be queueing a request to ep0 while
we're still on Setup Phase and we would be waiting for
another usb_ep_queue() forever.
Handle such cases by clearing dwc->delayed_status so that
we start control status from the next XferNotReady like
there was no wait for Delayed Status.
Tested against Linux 3.2-rc3 and USB30CV tool from USB-IF
(on a Windows XP with USB3 PCIe card).
Signed-off-by: Felipe Balbi <balbi@ti.com>
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ep->max_streams is a mere hint to the gadget
driver that 'ep' supports stream handling. Using
that as a decision variable for enabling streams
was my worst brain-fart to date.
Instead, we should check from the Superspeed
Endpoint Companion Descriptor if the endpoint
has requested streams. For that we need a little
re-factoring but it is now correct.
Debugged-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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previous commit fixed part of it but it was still
calling usb_ep_queue() from IRQ context without
loosing locks. That cannot be done otherwise we will
have a recursive locking.
Also, we need to assign the 'dep' pointer on
dwc->ep0_usb_req otherwise we will have a NULL
pointer dereference on dwc3_map_buffer_to_dma().
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Instead of special functions and shortcuts for sending our internal
answers to the host we started doing what the gadget does and used the
public API for this. Since we only were using a few fields the
usb_request was enough. Later added the list handling in order to
synchronize the host / gadget events and now we require to have the
dwc3_request struct around our usb_request or else we touch memory that
does not belong to us. So this patch does this.
Reported-by: Partha Basak <p-basak2@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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We mask the correct bits within the wrong register. The power
optimization mode is stored hwparam1 register and not in hwparam0.
Reported-by: Partha Basak <p-basak2@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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the new module_platform_driver macro is a helper
for modules which just register and unregister the
platform_driver. It allows us to delete a few
duplicated lines.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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DWC3 revisions <1.88a have an issue which would
case a missing Disconnect event if cable is
disconnected while there's a Setup packet
pending the FIFO.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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DWC3 revisions <1.90a have an issue which would cause
a missing USB3 Reset event. In such cases, it's
suggested that we follow the steps of a normal
USB3 Reset on Connection Done Event.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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RTL revisions <1.83a have an issue where, depending
on the link partner, the USB link might do multiple
entry/exit of low power states before a transfer
takes place causing degraded throughput.
The suggested workaround is to clear bits
12:9 of DCTL register if we see a transition
from U1|U2 to U0 and only re-enable that on
a transfer complete IRQ and we have no pending
transfers on any of the enabled endpoints.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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This patch avoids the compiler spitting out the following warning:
|drivers/usb/dwc3/gadget.c:1304: warning: 'trb' is used uninitialized \
in this function
This is only uninitialized if the list of to-cleanup TRBs is empty which
should not be the case because we call this functions once a transfer
completed so it should be on list.
In order to make the warning disappear we return early. This should
never happen and the WARN_ON_ONCE(1) is there in case it happens
so we can investigate what went wrong.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Since the re-worked ep0 handling (which uses HW's hints to recognize the ep0
status) we lost the delayed status handling. This is used by the file and mass
storage gadget to gain some extra time so setup its internal status before it
can proceed further requests.
In particular the storage gadget does nothing on USB_REQ_SET_CONFIGURATION but
wakes up a thread which handles the request. If the udc driver continues ep0
handling before the thread did its work then then endpoint is not yet
configured and further requests will fail. Once the gadget is ready, it will
enqueue an empty packet which is used for synchronization.
In order to fix this issue, the patch does the following:
Set ->delayed_status once the delayed_status has been notices and do not
continue on the next XferNotReady event. We will continues ep0 processing once
the gadget enqueued the zero packet for synchronization.
A cleaner approach would be to enforce the gadget to enqueue an empty
(zero) request even for the status phase but this would do for now.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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We wait for the XferNotReady before we start the transfer and by then we
know ep0 state in which we supposed to be.
This is some cleanup work for the following patch in which we require to
know the ep0 state before the transfer completes.
While here, also change the argument to dwc3_ep0_do_control_status() so
we don't require the complete event structure but only the required
piece of information.
Inspired-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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sparse caught three mistakes on this driver,
fix them:
drivers/usb/dwc3/ep0.c:806:29: warning: duplicate const
drivers/usb/dwc3/debugfs.c:481:15: warning: symbol 'dwc3_debugfs_init' \
was not declared. Should it be static?
drivers/usb/dwc3/debugfs.c:518:16: warning: symbol 'dwc3_debugfs_exit' \
was not declared. Should it be static?
Signed-off-by: Felipe Balbi <balbi@ti.com>
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There were a few coding style issues with this driver
which are now fixed:
drivers/usb/dwc3/debugfs.c:48: WARNING: Use #include \
<linux/uaccess.h> instead of <asm/uaccess.h>
drivers/usb/dwc3/debugfs.c:484: ERROR: space required \
before the open brace '{'
drivers/usb/dwc3/ep0.c:261: WARNING: line over 80 characters
drivers/usb/dwc3/ep0.c:287: WARNING: suspect code indent \
for conditional statements (16, 23)
drivers/usb/dwc3/gadget.c:749: WARNING: line over 80 characters
drivers/usb/dwc3/gadget.c:1267: WARNING: line over 80 characters
drivers/usb/dwc3/gadget.h:116: WARNING: line over 80 characters
drivers/usb/dwc3/io.h:42: WARNING: Use #include \
<linux/io.h> instead of <asm/io.h>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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A few inits like the scale value or the removal of the DISSCRAMBLE is
done in the gadget code however it touches a general register.
Move this piece to the core.c file since it is likely to be requied by
both, parts of the core (device and host).
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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There are two where need to set operational mode:
- during initialization while we decide to run in host,device or DRD
mode
- at runtime via the debugfs interface.
This patch provides a new function which sets the operational mode and
moves its initialiation to the mode switch instead in the gadget code
itself.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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In "usb: dwc3: remove special status request handling in ep0" I simplied
a few things and used the generic API for the status transfers. The bug
I introcuded here is that we queue now requests to dep[1] but we don't
clear that list in the stall+start case.
Actually we don't need to use dep[1] at all. We only did in the past to
talk to the correct endpoint (i.e. in or out). This is now take care of
in a diffent place within the ep0 code. So we could queue the in
transfers to dep[0] and don't use dep[1] at all.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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The first access was correct, the second was wrong.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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hardware will tell us how many event buffers we
need to support, so let's allocate the array
dynamically too.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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if we ever have an omap with multiple instances of
the DWC3 IP, we need unique names for them. In order
to achieve that, let's use the dwc3_get/put_device_id()
calls to give us an unique device identifier.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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if we want to support situations where we have
both SoC and PCIe versions of the IP on the same
platform, we need to have sequential numbers between
them, otherwise we will still have name collisions.
Because of that, we need to move dwc3_get/put_device_id()
to core.c and export that symbol to be used by glue
layers.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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The GetStatus (STD)-request is handled the driver and uses a tiny hack
to send the two bytes long answer. This patch removes the custom hack
uses the normal usb_ep_queue() for that.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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If we stall and restart we have to reset also this flag to 0 as there is
nothing pending anymore.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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None of these are required atm.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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The read and write operation is atomic and we need no locking around
this operations. What we need however is a lock that is held which
ensures that the content of the DWC3_GCTL has not been changed. With
this, the conten may have been change changed after the first but before
our write back.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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We can have three modules here: dwc3.ko, dwc3-omap.ko and dwc3-pci.ko.
The later have already ids-aliases for probing and is fine. The omap
module has alias for DT but lacks alias for the "native"
platform_device. Maybe we should get rid of it and stick to the DT name?
Both glue modules create a new device for which the dwc3.ko module is
responsible and that one lacks the platform alias.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Sometimes the host might be trying to initiate Data or
Status phase for an older Control transfer. In such
situations we must STALL that transfer and restart
the state machine rather than letting such situation
go through the wire.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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This makes testing a lot easier when trying to
switch between host and device modes.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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I have talked to USB-IF about USB30CV issuing SetAddres()
with a device on Configured state and they have agreed on
changing USB30CV not to do so.
Adding back the STALL reply in such case and while at
that, also add a debugging message for an address which
is too large.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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now that we have host support, we must depend
on both sides.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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host prototypes are there, let's move gadget's
closer.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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We can decide in runtime if that will be used
or not.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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The Designware USB3 IP can be configured with
an internal xHCI. If we're running on such a
version, let's start the xHCI stack.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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There's no need to add driver_data for something
we can fetch from HW.
This also makes our id_table unnecessary - at least
for now -, so we also remove it on the same patch.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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This will allow us to only allocate memory when
we actually need.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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this is mainly for testing. In order to be able
to test if we're enumerating correctly on all
speeds, let that be controlled by a module
parameter.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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when we remove the gadget driver, it will already
do that for us.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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